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CDOCAST Downward Continuous Casting Machine
CDOCAST jewelry continuous casting machine is designed for casting gold, silver, karat gold, copper, brass and bronze alloy into semi-finished wire, rod, bar, tube, strip and plate. It uses medium frequency induction heating, adjustable traction speed and argon or nitrogen protection for stable casting quality.
Machine Overview
This machine melts metal in the crucible and continuously pulls the semi-finished product downward through a graphite mold and water-cooled crystallizer. It is useful when a factory needs repeatable wire, rod, bar or plate blanks for rolling, drawing, stamping, machining or further forming.
Download the jewelry continuous casting machine catalog to check model capacity, power, machine size and configuration options.
Download CatalogFinished Products
Gold Wire For wire drawing, chain making and jewelry production.
Silver Rod For rolling, drawing, machining or further forming.
Silver Tube Matched with tube mold and suitable crystallizer design.
Copper Bar For copper alloy and brass alloy semi-finished products.
Plate and Strip For rolling mills, stamping and minting blank preparation.Core Design
Fast heating and strong electromagnetic stirring help gold, silver and copper alloy melt evenly before casting.
The pulling speed can be adjusted according to product diameter, plate width, alloy type and crystallizer cooling condition.
Inert gas protection reduces oxidation during melting and casting, especially for karat gold and copper alloy.
Round, flat and tube molds are selected according to the required wire, rod, bar, tube or plate shape.
The machine can stop when abnormal conditions occur, helping protect the equipment and reduce production risk.
Hydraulic shear, feeder and wire take-up spool can be added to match different production workflows.
Optional Configuration
Standard or Vacuum Type
For common gold, silver and copper alloy casting, argon or nitrogen protection is often enough. For oxidation-sensitive karat gold, brass, copper alloy or special alloy, a vacuum casting chamber can be selected to improve surface quality and reduce oxidation during melting and casting.
Technical Parameters
Model selection is based on silver reference capacity, power, product shape, graphite mold size, crystallizer design and downstream rolling or drawing process. The parameters below follow the updated CDOCAST continuous casting machine catalog.
| Model | CDO-JC15 | CDO-JC20 | CDO-JC30 | CDO-JC35 | CDO-JC45 |
|---|---|---|---|---|---|
| Voltage | 380V +/-10%, 3 phase, 50/60Hz | 380V +/-10%, 3 phase, 50/60Hz | 380V +/-10%, 3 phase, 50/60Hz | 380V +/-10%, 3 phase, 50/60Hz | 380V +/-10%, 3 phase, 50/60Hz |
| Power | 15kW | 20kW | 30kW | 35kW | 45kW |
| Application Metal | Gold, silver, copper | Gold, silver, copper | Gold, silver, copper | Gold, silver, copper | Gold, silver, copper |
| Melting Time | 5-8 min | 5-8 min | 7-8 min | 11-15 min | 10-14 min |
| Casting Speed | 10-20cm/min | 10-20cm/min | 10-20cm/min | 10-20cm/min | 10-20cm/min |
| Capacity | 3kg silver | 6kg silver | 20kg silver | 30kg silver | 50kg silver |
| Protective Gas | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon |
| Up Die Size | Dia. 88mm | Dia. 120mm | Dia. 160mm | Dia. 210mm | Dia. 234mm |
| Down Die Size | Dia. 60mm | Dia. 80mm | Dia. 120mm | Dia. 160mm | Dia. 170mm |
| Max Bar Size | 40 x 10mm | 50 x 10mm | 80 x 10mm | 100 x 20mm | 120 x 20mm |
| Machine Dimension | 800 x 600 x 1650mm | 900 x 700 x 1750mm | 1000 x 800 x 1850mm | 1350 x 1000 x 2100mm | 1450 x 1150 x 2200mm |
| Weight | 280kg | 330kg | 600kg | 680kg | 800kg |
Up die size, down die size and max bar size are catalog reference values. Final output size depends on graphite mold design, crystallizer opening, alloy flow and cooling condition. CDOCAST will confirm the final mold drawing before production.
How to Select
Tell us whether you cast gold, karat gold, silver, copper, brass, bronze or another alloy.
Wire, rod, tube, bar, strip and plate need different graphite molds and crystallizer designs.
Plate and strip width can be selected by mold design. Rod and bar diameter should be confirmed before quotation.
Select CDO-JC15, CDO-JC20, CDO-JC30, CDO-JC35 or CDO-JC45 according to silver reference capacity, alloy batch weight and daily production volume.
Vacuum Continuous Casting Machine For K-GOLD, Metal Alloy 
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.
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.
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.
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
▶ 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
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.
Explore the capabilities of our casting systems. Reach out today to discuss your production requirements—let’s engineer the right solution together.
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.
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.
A: To provide an accurate recommendation and quotation, we need to know your specific requirements:
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.
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.
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.
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.
A: Yes, continuous 24/7 operation is achievable, provided that adequate supporting cooling equipment is maintained.
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.
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.
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).
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.
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).
A: Our Continuous Casting Machine can be optionally equipped with a Wire Collecting Spool for coiling the cast wire.
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.
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.
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.
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.
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.
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.
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.
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.
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.
A: Yes, continuous 24/7 operation is achievable, provided that adequate supporting cooling equipment is maintained.
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.
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.
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).
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.
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).
A: Our Continuous Casting Machine can be optionally equipped with a Wire Collecting Spool for coiling the cast wire.
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.
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.
Hydraulic shear is optional attached to the Jewelry Continuous Casting Machine
Vacuum condition is optional and the advanced technology ensure the finished product dense, uniform and shiny
CDOCAST continuous casting machine can cast your precious metals to any desired shape,rod,plate, wire..etc
