1-4kg Model Jewelry Vacuum Casting Machine

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1-4kg Aluminum Shell Jewelry Vacuum Casting Machine

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1 KG Mini Jewelry Vacuum Casting Machine

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Semi Automatic Jewelry Vacuum Casting Machine

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The jewelry casting  process as below picture shows

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Finished Product From Jewelry Casting Machine

To learn all equipment in jewelry casting line

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Model number	CDO-JP1	CDO-JP4	CDO-VP4
Power	5kw	35kw	35kw
Voltage	220V,1P,50/60Hz	380V,3P,50/60Hz	380V,3P,50/60Hz
Casting system	Vacuum pressure casting system	Vacuum pressure casting system	Vacuum pressure casting system
Applicable metal	Gold, K-Gold, Silver, Copper, Brass, Bronze, and their alloys
Melting time	3-5min	3-5min	3-5min
Capacity	1kg gold	1-4kg gold	1-4kg gold
Max temperature	1600℃	1600℃	1600℃
Protective gas	Nitrogen or Argon	Nitrogen or Argon	Nitrogen or Argon
Operation system	Manual	Manual/Auto	Manual/Auto
Max pressure	2 MPa	2 MPa	4 MPa
Overall size	645*625*935mm	720*700*1150 mm	800*782*1336 mm
Weight	130 kg	210 kg	300 kg

The parameter of vacuum gypsum mixer

Model number	CDO-GM5	CDO-GM8
Power	750W	1500W
Voltage	380V,3P,50/60Hz	380V,3P,50/60Hz
Max flask size	4*10 inch	4*10 inch
Capacity	5 pcs	8 pcs
Weight	120KG	180KG
Dimension	700*680*1400mm	1000*1000*1550mm
Other sizes can be customized

The parameter of vacuum gypsum mixer pump

Model number	CDO-GMP15	CDO-GMP30	CDO-GMP70
Voltage	380V,3P,50/60Hz	380V,3P,50/60Hz	380V,3P,50/60Hz
Power	2.2KW	3KW	5.5KW
Rotary speed	320RPM	450RPM	420RPM
Oil Capacity	2.8L	2L	4.2L
Weight	190KG	236KG	338KG
Dimension	790*530*540mm	780*500*560mm	910*650*700mm

Click the link to get the crucible size

1: CDOCAST Jewelry Vacuum Pressurized Casting Machine is designed with the most advanced PID temperature control, maximum temperature can reach up to 1600 degrees Celsius, with a temperature difference of only 2 degrees.

2: The strong induction electromagnetic stirring force makes the metal solution more uniform, and the casting quality is higher.

3: The entire melting and casting process is carried out under vacuum, thus minimizing metal oxidation and minimizing metal loss.

4: CDOACAST Jewelry Vacuum Pressurized Casting Machine  Equipped with various safety alarms, such as over-current, over-pressure, water shortage and other alarms, when an emergency occurs, the machine can automatically stop

5: Integrated design of the melting and casting chambers for a more compact structure and a smaller footprint for our Jewelry Casting Machine

6: Jewelry Vacuum Casting Machine’s Pressurized casting design highly improves castings’ density and no porosity compared with the traditional casting

Q1: What are the main advantages of the fully automatic vacuum pressure casting machine?

A: Our vacuum pressure casting machine significantly improves casting quality by effectively eliminating common defects like shrinkage pores, gas holes, and slag inclusions. This results in denser, higher-quality castings. The fully automated process also boosts production efficiency and reduces the need for manual labor, making it ideal for high-volume manufacturing.

Q2: How does the machine operate?

A: The machine is equipped with a user-friendly Siemens touchscreen and a PLC control system. Operators can easily set parameters such as temperature, pressure, and cycle time on the screen. Once configured, the machine runs automatically, ensuring consistent and precise results with minimal operator intervention.

Q3: Can the machine be used for gold, silver, and platinum?

A: Yes, the machine is suitable for casting gold and silver. However, due to its high melting point and poor fluidity in molten form, platinum requires a centrifugal casting machine for optimal results.

Q4: What is the difference between the Steel-shell and Aluminum-shell models?

A: The Aluminum-shell model offers better sealing and higher pressure resistance because its cylinder is made from a single piece of aluminum, ensuring no air leakage.

The Steel-shell model, with its welded cylinder, may be prone to leaks over time. While the aluminum-shell version is more expensive, it provides superior performance and durability.

Q5: What is the maximum flask size supported?

A: The steel-shell machine supports flasks up to φ5×10 inches, while the aluminum-shell model can accommodate larger flasks up to φ5×14 inches.

Q6: What is the maximum pressure the machine can achieve?

A: The steel-shell model operates at 2 MPa, while the aluminum-shell model can reach up to 4 MPa, allowing for denser and more detailed castings.

Q7: What is electromagnetic stirring, and why is it important?

A: Electromagnetic stirring is a non-contact technology that uses electromagnetic forces to mix molten metal evenly. This is especially useful for alloys like K-gold, as it ensures uniform composition and reduces defects, resulting in higher-quality castings.

Q8:  How fine can the castings produced by the machine be?

A: With the electromagnetic stirring function, the machine ensures homogeneous mixing of molten metal, enabling the production of extremely fine details—comparable to the fineness of a human hair, even with K-gold materials.

Q9:  What is the metal loss rate during casting?

A: Metal loss is primarily due to oxidation and varies with the material and casting temperature. For example, in a test using 18K gold at 1060°C, the loss rate was approximately 0.125%. Higher temperatures generally lead to increased loss.

Q10: What are the installation requirements, and do you provide installation training?

A: Installation requires access to water, electrical power (total machine power ~20 kW, with a minimum 60A circuit breaker), protective gas, and an air compressor (30L capacity is sufficient).

We offer free online guidance for installation. If on-site assistance is required, clients are responsible for covering the visa, flight tickets, accommodation, and the engineer’s service fees.

Q11: What does routine and periodic maintenance include?

A: Regular maintenance is crucial for ensuring machine longevity and stability. Weekly/monthly tasks include inspecting seal rings for wear, cleaning vacuum line filters, and checking electrical connections. Vacuum oil should be replaced approximately every month to prevent clogging due to contamination.

Q12: What consumables are used, and how long do they last?

– Crucible: ~50 uses  

– Graphite rod: ~30 uses  

– Thermocouple: Several months

Advantages of  Jewelry Vacuum Pressure Casting Machine

1:Improving the quality of castings: The vacuum pressure casting machine reduces the presence of gases and impurities, making the internal structure of castings dense and reducing the generation of defects such as pores and shrinkage. This helps to improve the mechanical properties and corrosion resistance of castings, making the final product more reliable.

2:Enhanced alloy properties: In a vacuum environment, the oxidation reaction during the casting process is suppressed, thereby reducing the oxidation loss of the alloy. This can maintain the content of specific elements in the alloy and improve its properties and properties

3:Support for complex structural castings: Vacuum pressure casting furnaces can effectively cast castings with complex structures and rich details, as high vacuum environments and pressure operations can ensure more uniform flow of molten metal in the mold, filling fine voids

4: Energy saving: Compared with traditional casting methods, vacuum pressure casting furnaces have lower energy consumption. Due to faster heating and cooling rates in high vacuum environments, the entire casting cycle is shorter, saving energy and time costs.

PRODUCT CATALOG

3kg-30kg Capacity Precious Metal Continuous Casting Machine:

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 Vacuum Continuous Casting Machine For K-GOLD, Metal Alloy 

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Vacuum Continuous Casting Machine For Rod :

Vacuum Continuous Casting Machine With Wire Take Up Device

Model	CDO-JC15	CDO-JC25	CDO-JC30	CDO-JC35
Power	15kw	25kw	30kw	35kw
Voltage	Three phase 380V, 50/60Hz	Three phase 380V, 50/60Hz	Three phase 380V, 50/60Hz	Three phase 380V, 50/60Hz
Suitable Metal	Gold, Silver, Copper, Brass, Bronze, and their alloys	Gold, Silver, Copper, Brass, Bronze, and their alloys	Gold, Silver, Copper, Brass, Bronze, and their alloys	Gold, Silver, Copper, Brass, Bronze, and their alloys
Melting Time	About 5-6 mins	About 5-6 mins	About 15-30 mins	About 15-30 mins
Casting speed	10-20cm/m	10-20cm/m	10-20cm/m	10-20cm/m
Capacity	Gold:3.0 kg Silver: 2.0kg Copper:1.5kg	Gold:6.0 kg Silver: 4.0kg Copper:3.0kg	Gold:10.0 kg Silver: 6.0kg Copper:5.0kg	Gold:20.0 kg Silver:11.0kg Copper:10.0kg
Gas	Argon Gas or Nitrogen	Argon Gas or Nitrogen	Argon Gas or Nitrogen	Argon Gas or Nitrogen
Temperature	1600℃	1600℃	1600℃	1600℃
Overall Size	800*600*1650mm	900*700*1750mm	1000*800*1850mm	1000*800*1850mm
Machine Weight	200kg	220kg	240kg	250kg

Click the link to get the crucible size

Jewelry Continuous Casting Machine Feature

1. CDOCAST  Jewelry Continuous Casting Machine Adopts intermediate frequency induction heating technology, with the advantage of high power and fast melting, and the highest temperature can reach 1300°C.  It has a strong intermediate frequency stirring force, which can lead to a high degree of uniformity of the metal, which is especially helpful for the casting of gold, silver, and copper alloys.

2. Equipped with independent temperature control to continuously monitor the temperature during the entire draw process.

3. Comes with the built-in continuous temperature measurement system, easy to monitor the state of metal lead casting, which leads to the best density and quality of the final product.

4. Design with the ability to work 24 hours per day, this function ensures maximum productivity to meet the high production demands of some customers.

5. Power traction casting can realize drawing pipes, drawing rods, drawing sheets, and drawing strip pipes, which have the characteristics of high speed and high density of finished products. It has the unique magnetic stirring induction heating function to make the metal smelt more uniformly and increase the casting speed.

6. Special device is designed for pulling for automatic detection of slippage phenomena between the roller and the semi-finished product.

7. If a rapid cooling process is required, a water spray system can be installed to cool the semi-finished product directly.

8. Each continuous casting machine is equipped with advanced hydraulic shears for easy cutting of semi-finished products.

9. Abnormal alarm system, it will automatically stop when an abnormality occurs, so as to protect the machine to the greatest extent and prevent damage to the machine.

10. Different capacities can be customized, down-draw casting, effectively reduce the sand hole of the workpiece, and meet the requirements of deep processing.

*Precision-Engineered Outputs for Diverse Industries

From intricately designed jewelry components to standardized minting blanks and R&D prototypes, our Downward Continuous Casting Machine delivers:  

✔ Bars & Plates: Perfect for rolling mills, stamping, and fabrication  

✔ Tubes & Custom Profiles: Ideal for decorative, industrial, or architectural applications  

✔ Tailored Dimensions: Customizable molds and continuous casting parameters ensure products match exact customer specifications.  

*Cutting-Edge Features for Modern Manufacturers

1. Medium-Frequency Melting Technology

Achieve rapid, uniform melting with exceptional temperature stability—critical for preserving material properties and ensuring defect-free results.  

2. Optional Hydraulic Shear System

Streamline production of large plates and continuous bars with an integrated hydraulic shear that automatically cuts cast products to desired lengths. No manual handling, no compromise on precision.  

3. Intuitive Touchscreen Control

Take command of the entire casting process through a user-friendly digital interface. Monitor temperatures, control casting speed, and save custom profiles for different metals and shapes.  

4. Vacuum Casting Upgrade

For oxidation-sensitive metals and alloys, our optional vacuum chamber attachment ensures melt and cast processes occur in an oxygen-free environment, preserving material purity and surface quality.  

*Designed for the Innovators

Whether you’re crafting limited-edition jewelry, producing investment-grade minted products, or pioneering new alloys in a laboratory setting, this machine offers:  

– Repeatable, high-yield production cycles  

– Customization at every stage—from mold design to automation features  

– Enhanced metal integrity via controlled solidification and reduced oxidation  

*Ideal Applications Include

▶ Jewelry Manufacturing: Custom karat gold casting  

▶ Mint & Medallion Production: Consistent-quality blank formation  

▶ R&D and Specialty Alloy Development: Experimental casting under controllable conditions  

▶ Industrial Metal Fabrication: Copper and silver parts for technical applications  

*Bringing Imagination to Metal—Your Way

We don’t just build machines—we enable possibilities. With configurable options ranging from vacuum capabilities to smart automation, our Downward Continuous Casting Machine grows with your ambition.  

*Ready to Transform Your Metal Casting Process?

Explore the capabilities of our casting systems. Reach out today to discuss your production requirements—let’s engineer the right solution together.  

Q1. What types of metals is this casting machine suitable for? Can it be used for platinum or aluminum?

A: This machine is generally used for casting rods, plates, and bars from gold (especially Karat gold), silver, and pure copper.

*Platinum: Its melting point is too high. The graphite casting mold cannot withstand the extreme temperatures and would crack.

*Aluminum: Its rapid solidification rate poses a challenge. During downward pulling, the cast product is highly prone to breaking due to premature solidification.

Q2. What is the casting principle?

A: Molten metal is forced to cool and solidify within a mold (crystallizer). It is then continuously pulled downward via a traction wheel system, enabling a true continuous casting process.

Q3. How do I select the right Continuous Casting Machine for my needs?

A: To provide an accurate recommendation and quotation, we need to know your specific requirements:

1. Your raw material type.

2. The dimensions of your desired finished product.

3. Your target daily production output.

Q4. Why should I choose Downward Continuous Casting Machine?

A: Our Downward Continuous Casting Machine is ideal for small-batch, precision casting. A key advantage is the hydrostatic pressure from the molten metal bath during the pulling process. This pressure promotes:

Enhanced Density & Superior Yield: Products are denser and have a higher yield rate compared to some upward casting methods.

Exceptional Surface Finish: The same pressure results in a remarkably smooth, flat cast surface with minimal defects (e.g., wrinkles). This superior finish often eliminates the need for extensive subsequent surface machining or polishing.

Reduced Precious Metal Loss: Minimizing post-casting machining directly reduces material loss in the form of swarf, making it an ideal solution for jewelry manufacturers focused on material efficiency.

Q5. What are the achievable dimensions for cast bars and plates?

A: Plates/Strips: Width from a minimum of 20mm up to a maximum of 150mm.

Bars/Rods: Diameter from a minimum of 20mm up to a maximum of 80mm.

Q6. Can this casting machine cast both plates and bars simultaneously?

A: This is not recommended. Optimal casting requires specialized molds:

– Flat molds are best for plates/strips.

– Round molds are best for bars/rods.

Different mold shapes typically require different crystallizers to achieve the best cooling performance. A machine is usually configured for one type of crystallizer, and retrofitting is complex and impractical.

Q7. What temperature should I set for melting?

A: Generally, set the temperature several tens of degrees Celsius above the metal’s melting point. Examples:

*Gold (Melting Point ~1064°C): Set Point ~1080°C

*Pure Copper (Melting Point ~1083°C): Set Point ~1120°C

*Karat Gold (contains Cu/Ag): Temperature can be adjusted approximately ±20°C around the pure gold setting depending on the specific alloy.

Q8. Can this casting machine operate continuously 24 hours a day?

A: Yes, continuous 24/7 operation is achievable, provided that adequate supporting cooling equipment is maintained.

Q9. How do I set the correct casting speed?

A: Once the metal reaches the set temperature and is fully molten in the crucible, start with a slow initial speed set via the machine’s speed regulator. After a portion of the product has been successfully cast, gradually increase the casting speed. As a general rule, smaller product cross-sections require slower casting speeds.

Q10. Why does my product have surface cracks?

A: Potential causes include:

*Crystallizer Cooling Temperature Too Low: Causes differential contraction between the surface and interior, leading to shell cracking.

*Casting Speed Too High: The semi-solidified shell is torn by the pulling action before it gains sufficient strength.

*Melting Temperature Too Low: Metal is not fully liquid, affecting fluidity and solidification behavior.

Q11. Why does the product frequently fail to pull or break and fall during casting?

A: Breakage during downward casting is often heavily influenced by the cooling rate. If cooling is too rapid, the product solidifies prematurely before the pulling point, causing the pull rod to break it. Solutions involve readjusting:

① Crystallizer water temperature (e.g., typically 60-80°C for Karat gold).

② Crystallizer water flow rate.

③ Secondary cooling spray position (e.g., adjust the spray position closer to the traction wheel; positioning it too high can cause the section being pulled to solidify too early).

Q12. How is oxidation prevented, especially for metals like Karat gold?

A: Our machine can be equipped with an inert gas protection system. Users can introduce high-purity argon into the furnace chamber to prevent oxidation. For the ultimate protection, we offer models with a fully sealed vacuum casting chamber, where the entire process occurs in a controlled vacuum environment.

Q13. How can I cut the finished product?

A: Our Continuous Casting Machine can be optionally equipped with a Hydraulic Shear, designed for cutting the finished product (capable of cutting materials up to 20mm thick * 150mm wide).

Q14. How is the finished wire collected during casting?

A: Our Continuous Casting Machine can be optionally equipped with a Wire Collecting Spool for coiling the cast wire.

Q15. How is raw material replenished during continuous casting?

A: Our Continuous Casting Machine can be optionally equipped with a Feeder, allowing for the addition of material into the crucible during the casting process without interruption.

Q16. Why won’t the product connect properly with the pull rod?

A: Potential causes include:

① The metal material is not fully molten.

② The hook on the pull rod needs re-profiling/deepening to better engage the product.

③ The crystallizer water temperature is too low, causing the product to solidify before the pull rod can hook it effectively.

PRODUCT CATALOG

Small Upward Continuous Casting Machine:

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Operation Panel:

Model number	CDO-UP45	CDO-UP70
Voltage	3P, 380V, 50/60Hz	3P, 380V, 50/60Hz
Power	45kw	70kw
Applicable metal	Gold, K-Gold, Silver, Copper, Brass, Bronze, and their alloys
Rated capacity	50kg copper	100kg copper
Maximum temperature	1600℃	1600℃
Temperature control range	0-1300℃	0-1300℃
Melting time	≤40 minutes	≤40 minutes
Drawing speed	1000mm per minute	1000mm per minute
Cast scope	Metals Rod, Pipe, Plate	Metals Rod, Pipe, Plate
Dimensions	1260*690*1710mm	1260*690*1710mm
Weight	400kg	450kg

Click the link to get the crucible size

1:Different from the cored intermediate frequency induction furnace, the CDOCAST Small upward casting machine can not only work continuously for 24 hours, but also stop production at any time, which is very suitable for small factories.

2:Charcoal is added to prevent oxidation during the entire melting & casting process to minimize metal oxidation

3:Integrated design with small size design, the whole set of equipment adds up to only about 3 cubic meters, the user no need  to prepare the the speical foundation or build a platform for this small upward casting machine , Even a novice can learn to set up and use the equipment in less than half an hour.

4CDOCAST small upward casting machine Can be used for wire and tube drawing  with  various sizes.The crystallizer can be made to different specifications simply by changing the crystallizer to meet the customer’s needs.

5:: Suitable for continuous casting of gold, silver, K-gold as well as brass and copper.

Q1. Which metal materials is the Upward Continuous Casting Machine generally suitable for?

A: CDOCAST Upward Continuous Casting Machine is primarily suitable for copper (pure copper, oxygen-free copper), copper alloys (such as brass, bronze), as well as low-melting-point metals like silver and gold (If your raw material is alloy, please inform us of the specific composition of the alloy during the inquiry so that we can check).

Q2. What products can be manufactured using the Upward Continuous Casting Machine?

A: Our Upward Continuous Casting Machine is ideal for producing wire, rods, bars, plates/strips, and tubes etc.

Q3. What is the typical dimensional range of products cast by your Upward Continuous Casting Machine?

A: The following are the size ranges that can be produced:

✔ Silver/Copper Bars: Diameter 6-30mm

✔ Silver/Copper Tubes: Max. OD 80mm, Wall Thickness 3mm; Min. OD 20mm, Wall Thickness 1-2mm (Production rate approx. 200mm/min)

✔ Silver/Copper Plates/Strips: Width 12-40mm, Thickness 6-12mm

Q4. What is the working principle of the Upward Continuous Casting Machine?

A: The core principle is “Upward Pulling, Reverse Solidification”. It utilizes a crystallizer for localized cooling within the molten metal bath. A pulling mechanism continuously draws the solidified metal upward from the melt, enabling a continuous or semi-continuous casting process.

Q5. How can metal oxidation be effectively minimized during casting?

A: The simplest and most effective method is to cover the surface of the molten copper with a layer of charcoal or graphite flakes. This creates a protective barrier, isolating the molten metal from direct contact with the furnace atmosphere.

Q6. What are the common consumables for the Upward Continuous Casting Machine, and what is their typical service life?

A: The main consumables include silicon carbide crucibles, graphite molds etc.

Silicon Carbide Graphite Crucible: Service life approximately 50-150 heats (based on copper melting).

Graphite Components: Service life approximately 1-2 tons (based on finished product output).

*The actual service life depends significantly on the customer’s specific casting parameters and routine maintenance practices.

Q7. How do I select the right Upward Continuous Casting Machine for my needs?

A: To provide an accurate recommendation and quotation, we need the following information:

1. What is your raw material: Pure copper? Brass? Or other?

2. What product do you want to cast: Copper bar? Copper tube? And what are its specific dimensions?

3. What is your daily output? And how many working hours per day?

We can offer Small Upward Casting Machine and large-scale Upward Continuous Casting Machine:

*[Small Upward Casting Machine]: Available in single or double-strand configurations, with a daily output of 1-2 tons. Features an integrated melting-and-casting design. Key advantages include a small footprint, simple structure, easy installation and operation, high flexibility, and the ability to start or stop the process conveniently.

*[Large-Scale Upward Continuous Casting Machine]: Designed for high-volume production, requiring an annual output demand of at least 1000-2000 tons. Characterized by massive output, high automation, and exceptional efficiency. This system is designed for continuous 24/7 operation; interruptions can risk equipment damage. Once started, stable and uninterrupted operation is essential.

Q8. What are the main advantages of the Upward Continuous Casting Machine compared to other methods like Horizontal Continuous Casting?

A: The key advantages of our Upward Continuous Casting Machine include:

*Low Investment Cost: Relatively simple equipment structure, small footprint, resulting in lower initial investment and maintenance costs.

*High Flexibility: A single machine can simultaneously pull multiple strands (multi-strand casting). Simply changing the crystallizer allows production of different sizes and shapes (e.g., rods, wires, tubes).

*Superior Product Quality: Employs directional solidification, yielding a dense ingot structure with minimal porosity and slag inclusions. Especially suitable for producing high-quality oxygen-free copper products.

*Lower Energy Consumption: Compact process flow minimizes heat loss.

Q9. Why does the crystallizer require separate cooling during the upward casting process? What are the requirements for the cooling water?

A: The cooling water’s role is to carry away the substantial heat absorbed by the crystallizer from the liquid metal, ensuring rapid and uniform solidification within the crystallizer. Separate cooling allows for precise regulation of water flow and temperature, controlling the solidification process and guaranteeing optimal casting results.

Cooling Water Quality: The cooling water must be clean, free of impurities, and of moderate hardness. Impurities and scale can deposit inside the crystallizer’s water jacket, severely impairing cooling efficiency, leading to poor surface quality or even breakouts (liquid leakage). Using softened or deionized water is highly recommended.

Water Temperature & Pressure: The optimal water temperature should be maintained between 35-50°C and adjusted based on specific conditions. Water pressure should be within the range of 0.2 – 0.4 MPa.

Q10. Are the “Casting Speed” and “Cooling Intensity” adjustable on the Upward Continuous Casting Machine? How do they affect product quality?

A: Yes, the casting speed and cooling temperature are all adjustable. The maximum casting speed is typically adjustable between 1000-1200 mm/min (based on φ8mm rod) and must be fine-tuned according to the specific product dimensions. Generally, larger product sizes require slower casting speeds.

*Excessively Fast Casting Speed: Can lead to incomplete solidification of the strand within the crystallizer, causing “breakout” accidents, or resulting in internal issues like a porous structure or shrinkage cavities.

*Excessively Slow Casting Speed: Increases friction between the strand and the crystallizer wall, potentially breaking the strand, and reduces production efficiency.

*Insufficient Cooling Intensity: Results in a thin solidified shell and coarse internal grains, increasing the risk of breakouts.

*Excessive Cooling Intensity: Creates a large temperature gradient and high thermal stress within the strand, potentially leading to surface cracks.

Therefore, optimizing the match between pulling speed and cooling intensity based on the specific product specifications and metal type is crucial.

Q11. What safety precautions should be observed during the operation and maintenance of the Upward Continuous Casting Machine?

A: Prevent Burns: The operating area involves high temperatures. Always wear appropriate protective clothing, gloves, and a face shield.

Prevent Electric Shock: Ensure all electrical equipment is properly grounded. Prevent cooling water leaks onto electrical components.

Prevent Molten Metal Splashes: Contact between molten metal in the crucible and water can cause violent splashing. Keep the work area and tools completely dry.

Regular Maintenance: Conduct periodic inspections for wear on the crystallizer, crucible, and graphite components. Regularly clean cooling water passages and tighten mechanical parts to ensure stable equipment operation and safe production.

Product Catalog

Platinum Vacuum Centrifugal  Casting Machine :

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Vacuum Centrifugal Casting Machine Details:

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Centrifugal Casting Machine With Infrared Temperature Control

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Centrifugal Casting Machine Details

Centrifugal Casting Machine Siemens Touch Screen

Model	CDO-CE15	CDO-CE20
Power	15kw	20kw
Voltage	3P, 380V, 50/60Hz	3P, 380V, 50/60Hz
Applicable metal	Platinum / Palladium / Steel / Stainless steel
Melting time	2min	2-3 min
Max capacity	300g (platinum)	1kg (stainless steel)
Max temperature	2000℃	2000℃
Overall Size	800*600*1200mm	1300*1300*1300mm
Weight	230kg	450kg

Click the link to get the crucible size

Feature of centrifugal vacuum casting machine:

Advantages of Vacuum Centrifugal Casting:

• High-Quality Castings: The vacuum environment prevents oxidation and gas porosity, resulting in defect-free castings.
• Precision and Detail: Centrifugal force ensures that the molten metal fills even the most intricate mold details.
• Uniform Structure: The rapid cooling and centrifugal action produce a dense, uniform metal structure.
• Efficiency: The process is fast and suitable for high-volume production

Q1. Which metal materials is this Vacuum Centrifugal Casting Machine suitable for?

A: This machine is specifically designed for casting high-grade jewelry and is perfectly suited for various precious metals and alloys, including stainless steel, platinum, palladium, Karat gold, and silver.

Q2. What is the maximum melting capacity of this Vacuum Centrifugal Casting Machine, and what is the flask size?

A: The designed capacity range for this machine is between 300 grams and 1 kilogram, making it highly suitable for small to medium-batch jewelry production.
The common standard flask size is φ 3.5 x 4 inches. To accommodate diverse production needs, we support customization of other, larger flask sizes, such as φ 5 x 7 inches.
Please refer to the specification parameters for specific machine models for precise capacity, or inquire about custom machine options.

Q3. What is the working principle of the Vacuum Centrifugal Casting Machine?

A: Vacuum Centrifugal Casting involves conducting both the metal melting and pouring processes within a vacuum chamber. Subsequently, centrifugal force generated by high-speed rotation propels the molten metal from the crucible at high velocity, forcing it to fill every intricate detail of the investment mold, ensuring sharp definition and defect-free castings.

Q4. What are the main advantages of the Centrifugal Casting Machine compared to other methods like Vacuum Pressure Casting?

A: *Superior Mold Filling Power and Feeding Capability: Centrifugal casting holds a natural advantage for components requiring extreme density and superior mechanical properties.

*Ideal for Highly Reactive and High-Melting-Point Metals: Such as platinum, palladium, and stainless steel.

*Higher Casting Purity, Better Inclusion Control: Due to density differences, inclusions tend to be pushed towards the casting’s inner surface by centrifugal force, making them easier to remove during subsequent machining.

*Smoother Mold Filling, Lower Risk of Gas Entrapment: The laminar flow filling characteristic of centrifugal casting promotes smooth surfaces and minimizes gas porosity in the castings.

Q5. What level of vacuum can this Centrifugal Casting Machine achieve? Is the rotation speed adjustable?

A: The machine utilizes a #100 type vacuum pump, capable of achieving a vacuum level of 0.1 MPa. The maximum rotation speed is steplessly adjustable from 0-700 rpm.

Q6. Is this Centrifugal Casting Machine equipped with temperature control and a touchscreen system?

A: Infrared temperature measurement control and a Siemens PLC touchscreen control system are available as optional features.

Q7. How long does it take to produce one batch with this Centrifugal Casting Machine?

A: It is equipped with a latest-generation Japanese transistorized medium-frequency generator with continuously adjustable output power, this centrifugal casting machine achieves high production efficiency of 4-5 minutes per batch (melting time approximately 1-3 minutes, centrifugal casting time approximately 1-2 minutes).

Q8. Besides the casting machine itself, what other equipment do I need for operation?

A: Yes, you will also need a water chiller, an air compressor, and an inert gas supply:

Water Chiller: Required for cooling the machine’s induction coil to prevent overheating. Water pressure requirement is ≥ 0.2 MPa.

Air Compressor: Needed for the automated opening and closing of the machine lid. Required air pressure range: 0.4 – 0.8 MPa.

Inert Gas: Argon or Nitrogen can be used.

Q9. What consumables are required for this Centrifugal Casting Machine, and what is their typical service life?

A: The main consumables for this machine are quartz crucibles, investment powder, and flasks. Quartz crucibles are fragile items subject to high wear; their typical service life is around 2-5 uses. The specific service life depends on the customer’s operating environment and daily maintenance practices.

Q10. Why is vacuum application necessary before casting? What is its purpose?

A: Applying vacuum serves two core purposes:

① Prevents Metal Oxidation: Precious metals in a molten state are highly reactive and readily form oxide slag when exposed to oxygen, compromising casting quality and aesthetics. The vacuum environment eliminates this issue.

② Removes Gases from the Plaster Mold: Evacuating the air removes gases trapped within the investment mold surrounding the wax tree, ensuring the molten metal perfectly replicates the finest details and avoiding gas porosity in the final castings.

Q11. How should castings be cleaned and handled after the casting process is complete?

A: After casting is finished, use tongs to remove the flask. Then, submerge the entire flask in water for “quench cleaning.” The investment mold will disintegrate upon contact with water, revealing the casting tree inside. Finally, cut the individual castings from the sprue and proceed with subsequent finishing steps, like polishing.

Q12. What are the key maintenance points for this Centrifugal Casting Machine?

A: *Cleaning: After each use, thoroughly clean any spilled metal debris and investment material, especially from the centrifugal arm and bearing areas.

*Consumable Replacement: Monitor the condition of quartz crucibles and replace them promptly when needed.

*Vacuum Pump: Regularly check the vacuum pump oil level and oil condition. Change the oil according to the manufacturer’s schedule to maintain specified vacuum levels.

*Rotating Components: Periodically inspect the balance of the rotation arm and the flexibility of the release mechanism. Lubricate bearings as appropriate.

*Electrical System: Keep the equipment dry and clean. Regularly inspect power cords and connections.

Product Catalog

Small Metal Granulation Tank

2-4kg Gold Silver Grain Making Machine

6-12kg Gold Silver Grain Making Machine 

20-50kg Metal Granulator with Graphite Plug

20-50kg Metal Granulating Machine with Stirring Function

10-50kg Vacuum Metal Granulator

50-500kg Platform Type Metal Granulating Machine

Structure of  Gold &Silver Granulator

A gold silver granulator is a specialized machine used to produce high-quality gold granules, which are essential for applications in jewelry making, electronics, and industrial processes. One of the key components of a gold silver granulator is the **graphite crucible with a stopper rod**, which plays a critical role in controlling the flow of molten gold and ensuring consistent granule production. Below is an overview of the structure and functionality of this system.

### **1. Graphite Crucible**

The graphite crucible is the core component of the gold granulator, designed to withstand high temperatures and chemical corrosion. It is made from high-purity graphite, which offers excellent thermal conductivity and durability. The crucible is responsible for holding and melting the gold or silver

– **Material**: High-purity graphite ensures minimal contamination of the molten gold or silver.

– **Design**: The crucible is typically cylindrical with a tapered bottom to facilitate the flow of molten gold.

– **Heating**: The crucible is heated using an induction Heating furnace to melt the gold or silver at temperatures above 1,064°C (1,947°F).

### **2. Stopper Rod System**

The stopper rod is a precision mechanism that controls the flow of molten gold from the crucible into the granulation chamber. It consists of several key parts:

– **Rod Material**: The stopper rod is also made from high-quality graphite or ceramic to withstand high temperatures and resist wear.If the material is easily contaminated by graphite, we will also use boron nitride material as the plug rod

– **Sealing Mechanism**: The rod fits tightly into an opening at the bottom of the crucible, creating a seal to prevent molten gold from leaking.

– **Actuation System**: The stopper rod is connected to a manual or automated control system (e.g., pneumatic or electric actuator) that allows precise adjustment of the rod’s position. This controls the flow rate of the molten gold.

### **3. Granulation Chamber**

Below the crucible and stopper rod is the granulation chamber, where the molten gold is transformed into granules. This chamber typically includes:

– **Cooling Medium**: Water is mostly used to rapidly cool the molten gold droplets, solidifying them into granules.

– **Collection Tray**: A tray or container collects the solidified granules for further processing. CDOCAST granulator adopt the automatic lifting up tray to collect the granules, which can greatly reduce the cost the the production labour

### **4. Control System**

The gold granulator is equipped with a control system to regulate the melting and granulation process. This system includes:

– **Temperature Control**: Ensures the gold is melted at the optimal temperature.

– **Inert Gas Flow Control**: Adjusts the Inert Gas Flow Rate to get the most shinning and fine granules.

– **Automation**: Advanced granulators may feature automated controls for precise and repeatable operation.

### **5. Advantages of the Graphite Crucible with Stopper Rod**

– **Precision**: The stopper rod allows precise control over the flow of molten gold, ensuring uniform granule size.

– **Durability**: Graphite components are highly resistant to thermal and chemical degradation.

– **Efficiency**: The system enables continuous and efficient production of high-quality gold granules.

### **Conclusion**

The graphite crucible with a stopper rod is a critical component of a gold and Silver granulator, enabling precise control over the melting and granulation process. Its robust design and high-temperature resistance make it ideal for producing consistent, high-quality gold granules. By understanding the structure and functionality of this system, manufacturers can optimize their granulation processes and achieve superior results.

Model	CDO-MG05	CDO-MG10	CDO-MG25	CDO-MG35	CDO-MG45	CDO-MG55
Power	12kw	15kw	18kw	35kw	45kw	55kw
Voltage	380V(220V), 3 phase, 50/60Hz	380V(220V), 3 phase, 50/60Hz	380V, 3 phase, 50/60Hz
Applicable metal		Gold, K-Gold, Silver, Copper, Brass, Bronze
Max temperature	1600℃	1600℃	1600℃	1600℃	1600℃	1600℃
Melting time	2-5mins	2-5mins	5-8mins	10-15mins	10-20mins	20-30mins
Granulating time	About 5mins	About 5mins	About 10mins	About 15mins	About 20mins	About 30mins
Casting method	Gravity granulation	Gravity granulation	Gravity granulation	Gravity granulation	Gravity granulation	Gravity granulation
Max capacity	Gold: 2kg Silver: 1 kg	Gold: 4 kg Silver: 2 kg	Gold: 6-12 kg Silver: 3-6 kg	Gold: 40 kg Silver: 20 kg	Gold: 60 kg Silver: 30 kg	Gold: 100 kg Silver: 50 kg
Overall size	1000*500*965mm	1000*500*965mm	1150*500*1100mm	1610*1550*1930mm	1610*1550*1930mm	1610*1550*1930mm
Weight	150kg	150kg	270kg	600kg	700kg	750kg

Click the link to get the crucible size

1. The granulator is used to produce high-quality precious metal particles and alloy particles with uniform color. The finished beads have no oxidation, high density, and no pores, with especially good spherical surfaces, uniform particles, and stable color.

2. The metal granulator comes with Inert gas protection system, which minimizes oxidation in the process of metal melting and casting, especially suitable for precious metals and alloy metals that are easily oxidized. It also reduces the loss of smelted metal and increases the life of the crucible.

3. Applied with the Intermediate frequency induction heating technology, rapid melting speed, it takes about 15 minutes to melt one batch, and the casting time is about 15 minutes, which means that you will get high-quality metal grains within half an hour.

4. The temperature can reach 1600°C, the granulation time is 20-30 minutes, and the melting and granulation are completed in one. After the casting is completed, the pelletizing barrel is easy to take out.

5. Pure graphite crucible comes with quartz jacket as protection, the multihole design at the bottom can act as a breaker to make the molten metal  cast into grains. What is more, it only takes 5 minutes to replace new crucible, which is very convenient for the operator

6. Special cooling water to prevent adhesion of metal particles and make particles more evenly formed.

7. Metal granulator melting chamber and water tank can be designed separately or as an integrated unit. If there is not enough space for the user, we will recommend the integrated unit, which takes up less space.

8. The detailed and complete self-diagnosis system and protection function ensure that the equipment failure rate is low.

9. After the melt is completed, the casting speed is fast, making the metal particles smooth and smooth without sand holes.

10. CDOCAST provides 2 years of after-sales service, which minimizes customers’ concerns about after-sales service.

*Why Choose Our Granulation Equipment?

– Uniform Granules: Every batch produces smooth, round, and size-consistent metal particles.

– High Efficiency: Medium-frequency melting ensures quick processing with low energy consumption.

– Durability & Low Maintenance: Built with industrial-grade materials for long-term reliability.

– Customization Options: From discharge hole sizing to overall configuration, we adapt the machine to your needs.

 Ideal Applications:

✔ Precious metal refining and recycling

✔ Jewelry and decorative item manufacturing

✔ Electronic component production

✔ Metal powder and additive manufacturing feedstock

✔ Catalysts and chemical processing

*Let Us Help You Find the Right Solution

We know that every customer has unique production requirements and budget considerations. Whether you need a standard model for copper granulation or a vacuum system for high-purity silver granules, our team is ready to assist you in selecting the ideal equipment.

Whether you need a standard machine for copper granulation or a vacuum system for high-purity gold granules, we are here to support your production goals with cutting-edge technology and expert guidance.

*Contact us today* for a detailed consultation or request a personalized quotation. Let us help you optimize your metal granulation process with machines designed for quality, efficiency, and reliability.

Key Differences and Technical Essentials of Crucibles in Karat Gold vs. Pure Gold Granulation Processes

Q1: What is the warranty period for the machines?

A: All CDOCAST machines come with a comprehensive 2-year warranty. During this period, we provide free remote video diagnostics. Any components that fail or are damaged under non-abusive conditions will be replaced free of charge. If a machine fails due to a manufacturing defect, we will provide a complete machine replacement at no cost.

Q2: What is the typical service life for graphite crucibles, nozzles, and stopper rods?

A: The lifespan varies by component and usage:

*Graphite Crucible: 30 – 50 cycles

*Nozzle (Tip): 10 – 20 cycles

*Stopper Rod: 20 – 30 cycles

Q3: Do you provide operation manuals and instructional videos?

A: Yes, every machine is shipped with a detailed specification sheet and a comprehensive operation manual. If you require on-site technical support, we can dispatch an engineer for installation and commissioning. The service fee is USD $150 per day, excluding airfare, visa, and accommodation.

Q4: Can the voltage and frequency be customized?

A: Our standard granulators support 380V, 50Hz/60Hz, 3-Phase. Models with a capacity below 4kg also support 220V, 50Hz/60Hz, 1-Phase. The input voltage can fluctuate within a ±10% range. For other voltage requirements, we recommend using a transformer.

Q5: How do I choose the right granulator for melting alloys or easily oxidized metals?

A: For Alloys (e.g., K-gold): We recommend a granulator with a stirring device. This ensures a homogeneous mixture by preventing the different metal components from stratifying during melting, resulting in uniform alloy granules.

For Oxidizable Metals: We recommend a granulator with a vacuum system. This actively removes oxygen from the melting chamber, drastically reducing oxidation for a higher-quality final product.

Q6: Can I use the same nozzle for different materials?

A: No. Different materials have varying fluidity, melting points, and stability. Using the same nozzle can lead to clogging. Each material requires a nozzle with a specific number and diameter of holes. For example:

Gold Granules: Nozzle diameter of 0.8mm

Silver Granules: Nozzle diameter of 1.0mm

Copper Granules: Nozzle diameter of 1.2mm

Q7: What is the cycle time for melting and granulation per batch?

A: The time varies by machine capacity. For example:

4kg Granulator: Melting time 2-5 minutes; Granulation time 2-3 minutes.

10kg Granulator: Melting time 5-8 minutes; Granulation time 3-5 minutes.

Please refer to the specific technical parameters for each machine model.

Q8: Can the machine perform melting and granulation simultaneously?

A: Yes, but this is only feasible with our 2kg to 4kg models. These machines can be used for both functions by switching between a crucible with a hole (for granulation) and one without (for melting). For 6kg and larger models, the crucible is located inside a sealed furnace chamber, making it dangerous to remove during operation; therefore, these are designed for granulation only.

Q9: How should I preheat a new graphite crucible?

A: When using a new crucible or one that has been idle for several days, always preheat it at low power (20-30%) for 1 minute before adding raw material. Avoid 100% full-power preheating, as rapid temperature rise can cause trapped moisture to expand violently and crack the crucible.

Q10: For large raw materials, can I remove the stopper rod and add material while melting?

A: This is possible for high-purity metals like pure gold, silver, or copper. However, it is not recommended for alloys or K-gold. These materials have poorer fluidity, and without the stopper rod to control the flow, a small amount of residual metal may not have enough gravitational force to overcome its own viscosity, leading to material loss and incomplete drainage.

Q11: What is the minimum amount of material required for granulation?

A: The material weight must reach at least one-third (1/3) of the crucible’s capacity. Insufficient material will not generate enough gravitational force for complete drainage, resulting in residue and loss.

Q12: Is it necessary for me to buy a vacuum granulator?

A: For melting pure gold and pure silver, a vacuum system is typically not necessary. These high-purity precious metals are inherently resistant to oxidation, and our machines are equipped with an inert gas protection system (Argon/Nitrogen) that flows throughout the process.

A vacuum granulator is highly recommended for alloys like K-gold or 925 silver to minimize oxidation and ensure high-quality granules. However, as vacuum machines are more expensive, the choice depends on your specific production needs and budget. We strongly advise consulting with our technical engineers before purchasing to determine the best solution for you.

Catalog-for-Metal-Granulator

Gold Flake Making Machine

 

Tilting Type Platinum Flake Making Machine

Click the photo to watch the video

Parameter of Metal Flake Making Machine

Model number	CDO-FC50	CDO-FC70
Power source	Three phase 380V±10%, 50/60Hz	Three phase 380V±10%, 50/60Hz
Power	50kw	70kw
Max capacity	100 KG Gold	20 KG Platinum
Melting time	10-30 min	10-15 min
Max temperature	1250℃	2000℃
Protective gas pressure	0.2 MPa(argon or nitrogen)
Air pressure	0.6-0.8 MPa	0.6-0.8 MPa
Temperature control	PID	PID
Cooling water	Water pressure: 0.2-0.4 MPa, flow rate: 3m³/h
Dimension	2100*2355*2573mm	2100*2000*2575mm
More specifications can be customized

1. This machine prevents oxidation and wear of metals caused by high temperatures during centrifugal rotary blade.

2. It effectively improves product quality and significantly reduces production costs.

3. It improves refining quality, resolves recycling issues, and increases reactor efficiency.

4. This machine offers simple operation, reliable quality, and safe production.

5. Medium-frequency heating is harmless to the human body.

Q1: What is the working principle of the metal flake making machine?

A: The machine uses centrifugal force to transform molten metal into thin flakes. The metal is poured onto a high-speed rotating disc, where it instantly solidifies and is flung into a collection chamber.

Q2: Which metal materials can this metal flake making machine process?

A: This metal flake making machine can work with gold, silver, copper, and platinum. For high-melting-point metals like platinum, a tilting model is recommended to ensure proper melting and handling. For gold, silver, and copper, a standard integrated model is sufficient.

Q3: How thin are the flakes produced by this metal flake making machine?

A: The flakes are generated by the high-speed rotation of the centrifugal system. Under normal operation, they can achieve a remarkably thin, paper-like consistency (≤ 0.1mm).

Q4: What are the advantages of the Metal Flake Making Machine compared to a Powder Making Machine?

A: Our metal flake making machine offers significant benefits:

✔ Lower equipment cost

✔ Minimal auxiliary equipment needed (only a water chiller and dust suction device), compact size, saving space

✔ Lower material loss

✔ Simple operation with no additional processing required

Q5: What is the material loss rate?

A: The loss rate is very low, limited to minor oxidation during melting and minimal dust loss during collection.

Q6: What is the RPM of the centrifugal system?

A: The centrifugal disc operates at an adjustable speed, with a maximum of 1400 RPM.

Q7: What are the consumables and their typical service life?

A: Graphite Crucible: Approximately 50 uses.

Quartz Crucible: Approximately 3 uses.

Product Catalog

Small metal powder making tank

10kg 20kg 30kg 50kg Metal Vacuum Powder Making Machine

→Click here to watch the video

 

Platinum Steel Tilting Type Powder Making Machine

Click the photo to watch the video

50kg 100kg 150kg 200kg Steel Iron Copper Aluminum  Powder Making Machine

→Click here to watch the video

5kg Metal Vacuum Gas Atomization Powder Making Machine

→Learn more about the powder making

Water Atomizer/Vacuum Metal Powder Making Machine

The process of making metal powder by water atomization has a long history. In ancient times, people poured molten iron into water to make it explode into fine metal particles, which were used as raw materials for making steel; There are also people who pour molten lead water directly into the water to make lead pills. The process principle of making alloy powder by water atomization is the same as that of making water-burst metal liquid in ancient times, but modern technology has greatly improved the efficiency of crushing and manufacturing particles

To make metal alloy powder by high-pressure water atomization method, first, melt the raw metal in the melting furnace, and then the molten gold must be overheated for about 50 degrees and then injected into the tundish. Start the high-pressure water pump before the injection of metel solution, and let the high-pressure water atomization device start the workpiece. The metel liquid in the tundish enters the atomizer through the nozzle at the bottom of the tundish through the beam flow.

The atomizer is the key part for producing metal alloy powder by high-pressure water mist. The atomizer is related to the metal powder-making efficiency, Under the action of the high-pressure water from the atomizer, the molten metal liquid is continuously broken into fine droplets, which fall into the cooling liquid in the water tank and solidify into alloy powder。

In the traditional high-pressure water atomization process for producing metal powder, the metal powder can be collected continuously, but a small amount of metal powder is lost with the atomized water， In the process of producing alloy powder by high-pressure water atomization, the atomized product is concentrated in the atomization device, and then precipitated and filtered (it can be dried if necessary, and generally sent directly to the next process。

A complete set of equipment for producing metal alloy powder by high-pressure water atomization is composed of the following parts:

1:For the melting part, the medium frequency induction melting furnace is the best choice. The capacity of the furnace depends on the processing capacity of the metal powder, we have furnace capacity from 2kg to 100kg per batch.

2:  The atomization part, the equipment in this part is non-standard equipment, which should be designed and arranged according to the site conditions of the manufacturer, mainly including the tundish: when the tundish is produced in winter, it needs to be preheated;

Atomizer: the atomizer will come from high-pressure water, The high-pressure water of the pump impacts the metal liquid from the tundish at a predetermined speed and angle, breaking it into metal droplets.

Under the same water pump pressure, the amount of fine metal powder after atomization is related to the atomization efficiency of the atomizer; the atomization cylinder: it is the place where the alloy powder is atomized, crushed, cooled and collected.

3:In order to prevent the ultra-fine alloy powder from being lost with water, the obtained alloy powder should be left for a period of time after atomization, and then placed in the powder collecting box.

4:Post-processing part: powder collecting box: used to collect the atomized alloy powder and separate and remove excess water; drying furnace: dry the wet alloy powder with water;

screening machine: sieve the alloy powder, Out-of-specification coarser alloy powder can be re-melted and atomized as the return material

Integrated Type Powder Making Machine

Model	CDO-PM20	CDO-PM25	CDO-PM30	CDO-PM40	CDO-PM45	CDO-PM50
Power	20 KW	25 KW	30 KW	40 KW	45 KW	50 KW
Voltage	380V, 3 phase, 50/60Hz
Melting time	10 min	15 min	18 min	20 min	25 min	30 min
Casting time	2 min	3 min	5 min	8 min	10 min	15 min
Capacity	5 kg gold	10 kg gold	15 kg gold	20 kg gold	30 kg gold	50 kg gold
Pump power	15 KW	15 KW	15 KW	23 KW	23 KW	23 KW
Water pressure	15Mpa	15Mpa	15Mpa	20Mpa	20Mpa	20Mpa
Flow rate	20L/min	20L/min	20L/min	30L/min	30L/min	30L/min
Dimension	1360*1135*2000 mm				1450*1290*2000 mm
Weight	680 kg	700 kg	720 kg	750 kg	1000 kg	1100 kg
Application metal	Gold、Silver、Copper、Aluminum、Zinc、Tin、etc.

Platform Type Powder Making Machine

Model		CDO-LPM50	CDO-LPM75	CDO-LPM90
Hydraulic metal furnace	Power	50 KW	75 KW	90 KW
	Voltage	380V, 3 phase, 50/60Hz
	Capacity	50 kg gold	100 kg gold	150 kg gold
Platform	Dimension	4*4*2.5 m	4*5*2.5 m	4*5*2.5 m
	Capacity	5 kg gold	10 kg gold	15 kg gold
Powder size		200-1000 mesh	200-1000 mesh	200-1000 mesh
Hydraulic pump		Inlet pressure: ≥0.1 MPA, Outlet pressure: 17MPA, Flow rate: 170L/min, Speed: 405r/min
Casting method		Gravity granulation	Gravity granulation	Gravity granulation
Applacation metal		Iron, stainless steel, platinum and other high temperature metals

Click the link to get the crucible size

1. Adopt the electromagnetic induction heating principle with the feature of rapid melting time and  high production efficiency， The melting temperature rises quickly, the production efficiency is high, and the particle size distribution is good.

2. With the ability to 24-hour continuously work, can meet the needs of customers with different production output.

3. Come with a vacuum Pump design, the whole granulation is carried out in the vacuum environment to minimize oxidation.

4. CDOCAST vacuum powder making machine can be used for both granulation and pulverizing. With one machine you can do both purposes.

5. This Vacuum powder making machine covers a very small production area and is easy to operate.  No engineer needs to sent to do the on-site installation.

6. The Vacuum powder making machine with different capacity can be customized according to customer’s demand, and the maximum capacity can reach 100 kg per batch.

7. The brand-new integrated furnace body structure design helps to improve the performance of powder making.

8. The metal smelting process can be protected by inert gas to reduce oxidation.

Water atomized powder is a metal or alloy powder prepared by high-pressure water atomization technology. It is widely used in powder metallurgy, 3D printing, magnetic materials, welding materials and other fields. Its core features are as follows:

1. Particle morphology and structure
-Irregular shape: During the water atomization process, the molten metal droplets are rapidly cooled under the impact of high-pressure water flow, forming irregular shapes (such as spherical, flaky or dendritic) with high surface roughness.
-Surface oxide layer: Due to the contact between water and high-temperature metal, an oxide layer is easily formed on the surface of the powder (subsequent reduction treatment is required).
-Satellite powder and hollow powder: Some particles may form “satellite powder” due to collision and adhesion, or “hollow powder” may be formed due to the failure of internal gas to escape.

2. Particle size distribution
-Wide range: The particle size of water atomized powder is usually distributed between 10~150μm, which can be controlled by adjusting parameters such as water pressure and nozzle design.
-Suitable for coarse powder needs: Compared with gas atomized powder (finer and more spherical), water atomization is more suitable for scenes with looser particle size requirements (such as MIM metal injection molding).

3. Chemical composition and properties
-High oxygen content: Oxygen is easily introduced during the water atomization process (H₂O decomposition), and the oxygen content needs to be reduced by vacuum annealing or hydrogen reduction (for example, the oxygen content of iron-based powder can be reduced to less than 0.3%).
-Alloy flexibility: A variety of alloy powders can be prepared (such as stainless steel, tool steel, copper alloy, etc.), but highly active metals (such as titanium and aluminum) require special protection.

4. Process efficiency and cost
-High production efficiency: Water atomization equipment is simple, suitable for large-scale continuous production, and the cost is significantly lower than gas atomization.
-Low energy consumption: No inert gas protection is required, only high-pressure water pumps and cooling systems are required, and energy consumption costs are lower.

5. Application
-Powder metallurgy: automotive parts (gears, bearings), cemented carbide premixed powder.
-Magnetic materials: Preparation of Sendust soft magnetic powder.
-Welding and coating: used as welding rods and thermal spraying materials.
-3D printing (some areas): Binder jetting (Binder Jetting) with low requirements for powder sphericity.

6. Comparison of advantages and disadvantages

Advantage	Disadvantage
Low cost, suitable for large-scale production	Irregular powder shape, poor fluidity
Can be used for high melting point alloys	High oxygen content, requires subsequent treatment
Simple operation	Low fine powder yield (<20μm)

7. Comparison with other atomization technologies
-Gas atomization: finer powder, high sphericity, low oxygen content, but high cost, suitable for high-end fields such as aerospace, 3D printing, etc.
-Centrifugal atomization: uniform particles but complex equipment, mostly used for specific alloys (such as titanium powder).
-Water atomization: the king of cost-effectiveness, suitable for industrial applications that are not demanding on cost and shape.

The core competitiveness of water atomized powder lies in low cost and high production capacity, especially suitable for fields with high tolerance for powder shape and oxygen content. If higher purity or sphericity powder is required, gas atomization or plasma atomization process can be considered. The actual selection needs to be comprehensively evaluated in combination with the application scenario, cost budget and post-processing capabilities.

Q1. What information do you need to provide a quotation and recommend a suitable model?

Prior to issuing a quotation, we require the following key parameters:

*Target Metal: The specific metal or alloy you intend to atomize (e.g., gold, silver, copper, iron).

*Daily Production Capacity: Your required output in weight per day.

*Particle Size Distribution: The desired powder size range (e.g., 100-200 mesh).

*Particle Shape (Sphericity): Requirements for particle morphology.

*Oxygen Content: Maximum allowable oxygen content in the final powder.

*Application of powder: For refining? 3D print? PM sintering or other purposes?

Providing these details is essential for an accurate proposal. If necessary, we can also produce sample powders for your evaluation.

Q2. What are the water requirements and consumption for the machine?

*Water Quality: We recommend using deionized or purified water. Tap water contains high levels of minerals, which can cause scaling, block water lines, and potentially contaminate the final product.

*Cooling Water Circuit: The cooling water for the furnace’s mechanical section is supplied by a closed-loop chiller system. This is an internal cycle with only minimal evaporation loss, requiring only periodic top-ups.

*Atomization Water Circuit: The machine is equipped with a water tank for the high-pressure atomization pump. This water is used to disintegrate the molten metal stream. The resulting water-powder mixture is then separated by a filter press.

*Water Consumption & Reuse: The atomization process is the primary consumer of water. The discharged water will contain simple impurities and residual metal particles. For water recycling, we recommend purchasing an optional filtration unit.

Q3. What is the power consumption profile of the machine?

The power load varies by process stage:

*Melting Phase: ~45 kW for approximately 20 minutes (requires chiller operation at ~10 kW).

*Holding & Atomizing: ~10 kW for molten metal holding, plus the high-pressure pump at ~55 kW for atomization.

*Separation & Drying: The filter press operates at ~5 kW, followed by the dryer at ~5 kW.

Q4. What certifications do your machines carry? Do you have UL certification?

All our equipment is standardly certified to the CE marking, demonstrating compliance with European health, safety, and environmental standards. We do not provide UL certification as a standard offering due to its prohibitively high cost, lengthy certification cycle, and general impracticality for custom, special-purpose machinery.

Q5. Can the copper powder size be adjusted? How is this controlled?

Yes, particle size is adjustable through a combination of two key parameters:

1.  *Water Pressure: Adjusted via the control switch on the high-pressure pump.
2.  *Molten Metal Flow Rate: Controlled by the nozzle aperture size at the bottom of the tundish (flow control funnel).

By fine-tuning these variables, you can influence the resulting particle size distribution.

Q6. What metals can the CDOCAST atomizer process?

We offer different models for various metal groups:

*Integrated Atomizer: Ideal for non-ferrous metals like gold, silver, copper, brass, bronze etc.

*Tilting-Type Atomizer: Recommended for high-melting-point precious metals such as platinum and palladium.

*Platform-Type Atomizer: Necessary for stainless steel and iron. These metals require a larger atomization chamber to handle the higher melting temperatures and larger volumes.

Q7. What is the typical particle size range of the produced powder?

The machine typically produces powder in the range of 100 to 1000 mesh. It is important to note that the atomizer produces a distribution of particle sizes within a set range. If a specific, tight cut (e.g., 150-200 mesh) is required, the powder must be processed through a separate screening or classifying machine after atomization.

Q8. What factory space is required for installation?

Space requirements depend on the machine type:

*Integrated Atomizer: Compact and simple. A room of approximately 4m x 6m is usually sufficient.

*Platform-Type Atomizer: Requires a larger workshop of about 5m x 10m with sufficient height and an overhead crane for handling.

Q9. What is the difference between Water and Gas Atomization, and which type is your machine?

*Water Atomization: Uses high-pressure water jets to break up the molten metal stream.

*Powder Characteristics: Irregularly shaped particles, higher oxygen content.

*Our Machine Type: The machine described in this document is a Water Atomization system.

*Gas Atomization: Uses inert gas (e.g., Nitrogen, Argon) jets to disintegrate the melt.

*Powder Characteristics: Highly spherical powder, low oxygen content.

*Application: Essential for applications like 3D Printing (Additive Manufacturing).

We offer both technologies. Please consult with our technical team before ordering to select the correct atomization method for your application.

Product Catalog

5Kg Gas atomization vacuum powder making machine

 

 

 

10Kg -500Kg Vacuum Gas Atomizer

Gas Atomization Vacuum Powder Making Machine

 

 

 

 →Learn more about the powder making

Gas Atomization Vacuum Powder Making Machine Working Principles 

 

1. Melting Process: First The furnace should be vacuumed, and the raw materials in the crucible are induced to melt in a vacuum environment. After meeting the process requirements, the metal liquid is poured into the insulation crucible of the tundish, and flows into the atomization nozzle through the guide hole at the bottom of the insulation crucible;

2. Atomization Process: The atomization nozzle is filled with high-pressure inert gas, which accelerates through the Laval structure cavity to form a supersonic airflow. The metal liquid that falls into the atomization zone is impacted and broken, causing it to atomize into fine metal droplets;

3. Powder collection: Liquid droplets become spherical particles under surface tension in the air, rapidly cool and solidify into metal powder in the atomization chamber, and then collect the metal powder through a cyclone separation system

Gas Atomization Vacuum Powder  Making Machine Feature:

 

1. Strong applicability, capable of preparing most metals and their alloys that cannot be atomized with air or water. Typical products include stainless steel, mold steel, high-temperature alloys, cobalt chromium alloys, aluminum alloys, etc.

2. There are various incoming materials, including alloy ingredients, parent alloy, and powder return materials;

3. The cooling rate is fast, and the solidification rate of droplets reaches 103-106K/s, rapidly solidifying into fine microcrystalline structures;

4. High purity, refined alloy under vacuum, with gas and impurity content

5. Good powder quality, using tightly coupled or free atomization nozzle technology, with high sphericity and controllable particle size;

6. Easy to operate, short production preparation time, and capable of continuous batch production;

7: High controllability: Vacuum atomization equipment usually has multiple process parameters to adjust, such as liquid injection speed, pressure, temperature, etc., allowing the operator to accurately control the size, shape, and distribution of particles.
8: Stable powder quality: Due to atomization in a vacuum environment, the influence of impurities and oxygen in the gas on the powder can be reduced, thereby ensuring the quality and stability of the powder.

9: Avoiding oxidation reactions: Due to the low oxygen content in the vacuum environment, oxidation reactions of some substances can be avoided during the atomization process, thereby maintaining the chemical properties of the raw materials

Gas Atomization Vacuum Powder Making Machine Parameter:

Model		CDO-GP5
Voltage		380V,3P
Max temperatuer		1800℃
Capacity		5kg molten iron
Gas pressure		≥5MPa, pressure control accuracy 2~3%
Gas flow rate		3.0-30Nm³/min, flow control accuracy 3%
Commonly used powder granules size segments		15~45μm，15~53μm，53~150μm
Power supply	Adopts power	Medium frequency power supply
	Oscillation frequency	1-20KHz
	Max input power	45KW
	Output current	15-95A
	Output voltage	70~550V
	Cooling water	≥0.2MPa ≥6L/min
	weight	35KG
	Load duration	100%
	Input voltage	380V 3P 50/60Hz
Chamber size		Φ500*500mm
Vacuum degree		< 5X10-3Pa
Chamber inflation pressure		< 0.05MPa
Boost rate		<4 Pa/h
Burnout protection and display		yes
Over temperature protection		yes
Overcurrent protection		yes
Under water pressure protection		yes
Temperature control		PID
Control accuracy		± 1~ 5 ℃（more than 600℃）
Atomization system		The atomization system consists of nozzles, high-pressure air pipes, valves, etc.
Gas supply system		The gas supply system is a device that provides gas to the atomizing nozzle. It consists of valves, high-pressure pipes and gas source busbars.
Atomization chamber		It is a container that can connect all devices together as required. It is a space where metal droplets condense. The inner wall is stainless steel, the outer layer is carbon steel, and the middle is a water-cooled interlayer.
Powder collector		During the powder making process, some ultra-fine powder flies out along the pipe with the high-speed air flow. If not collected, it will pollute the environment and waste materials, so they must be recycled. The current recovery method is to use cyclone separators and water phase collection methods to solve the problem.
Control system		It adopts PLC plus touch screen control, and all operations are integrated on the touch screen. The software interface is simple and easy to operate, and one-click vacuuming can be achieved. Support data collection, storage and export.
Observation window		Diameter 90mm

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