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CDOCAST Jewelry Casting Equipment
Compare CDOCAST jewelry vacuum casting machines for gold, K gold, silver and copper alloy production. This purchasing page covers 1–4 KG vacuum pressure casting machine models, semi-automatic and automatic options, plus the matching vacuum gypsum mixer and vacuum pump.
Compare compact, semi-automatic and automatic options by capacity, control level and workshop production needs.
A practical separate-melting solution for experienced workshops that need vacuum and pressure assistance with flexible daily production.
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The compact CDO-JP1 combines induction melting and vacuum pressure casting for small jewelry workshops. It uses 220V single-phase power and manual controls.
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Integrated melting and casting with programmable control for buyers who need more consistent settings and repeatable batch production.
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An upgraded chamber option for buyers who require improved sealing, stronger pressure capability and stable fine-detail casting.
View videoKey equipment features for buyers comparing jewelry vacuum casting systems.
Compare the complete CDOCAST jewelry vacuum casting machine range by power, capacity, operating system, pressure, size and weight.
| Parameter | CDO-JP1 | CDO-JP2 | CDO-JP4 | CDO-VP2 | CDO-VP4 |
|---|---|---|---|---|---|
| Power | 6 kW | 15 kW | 20 kW | 15 kW | 20 kW |
| Voltage | 220V, single phase, 50/60Hz | 380V, 3 phase, 50/60Hz | 380V, 3 phase, 50/60Hz | 380V, 3 phase, 50/60Hz | 380V, 3 phase, 50/60Hz |
| Casting system | Vacuum pressure casting | Vacuum pressure casting | Vacuum pressure casting | Vacuum pressure casting | Vacuum pressure casting |
| Applicable metal | Gold, K gold, silver, copper, etc. | Gold, K gold, silver, copper, etc. | Gold, K gold, silver, copper, etc. | Gold, K gold, silver, copper, etc. | Gold, K gold, silver, copper, etc. |
| Melting time | 3–5 min | 3–5 min | 3–5 min | 3–5 min | 3–5 min |
| Capacity | 24K gold: 1 KG 18K gold: 0.75 KG 925 silver: 0.5 KG | 24K gold: 2 KG 18K gold: 1.5 KG 925 silver: 1 KG | 24K gold: 4 KG 18K gold: 3 KG 925 silver: 2 KG | 24K gold: 2 KG 18K gold: 1.5 KG 925 silver: 1 KG | 24K gold: 4 KG 18K gold: 3 KG 925 silver: 2 KG |
| Maximum temperature | 1600°C | 1600°C | 1600°C | 1600°C | 1600°C |
| Protective gas | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon | Nitrogen or argon |
| Operation system | Manual | Manual / Auto | Manual / Auto | Manual / Auto | Manual / Auto |
| Maximum pressure | 0.2 MPa | 0.2 MPa | 0.2 MPa | 0.4 MPa | 0.4 MPa |
| Overall size | 645 × 625 × 935 mm | 800 × 800 × 1350 mm | 800 × 800 × 1350 mm | 820 × 830 × 1400 mm | 820 × 830 × 1400 mm |
| Weight | 130 kg | 270 kg | 290 kg | 350 kg | 370 kg |
Jewelry Casting Line Supporting Equipment
These are supporting machines for the jewelry vacuum casting machine line. The vacuum gypsum mixer blends investment powder and water while removing air from the slurry, and the connected vacuum pump provides the required vacuum.
Compare CDO-GM5 and CDO-GM8 by flask capacity, installed power and machine size.
| Parameter | CDO-GM5 | CDO-GM8 |
|---|---|---|
| Power | 750 W | 1500 W |
| Voltage | 380V, 3P, 50/60Hz | 380V, 3P, 50/60Hz |
| Maximum flask size | 4 × 10 inch | 4 × 10 inch |
| Capacity | 5 pcs | 8 pcs |
| Weight | 120 kg | 180 kg |
| Dimensions | 700 × 680 × 1400 mm | 1000 × 1000 × 1550 mm |
Published CDOCAST pump specifications for CDO-GMP15, CDO-GMP30 and CDO-GMP70.
| Parameter | CDO-GMP15 | CDO-GMP30 | CDO-GMP70 |
|---|---|---|---|
| Voltage | 380V, 3P, 50/60Hz | 380V, 3P, 50/60Hz | 380V, 3P, 50/60Hz |
| Power | 2.2 kW | 3 kW | 5.5 kW |
| Rotary speed | 320 RPM | 450 RPM | 420 RPM |
| Oil capacity | 2.8 L | 2 L | 4.2 L |
| Weight | 190 kg | 236 kg | 338 kg |
| Dimensions | 790 × 530 × 540 mm | 780 × 500 × 560 mm | 910 × 650 × 700 mm |
Use these buyer checks when comparing any 1–4 KG gold, silver or K gold vacuum pressure casting machine in the CDO-JP and CDO-VP ranges.
Select a 1 KG, 2 KG or 4 KG jewelry vacuum casting machine according to the actual gold, K gold or silver weight required per cycle.
How to select a jewelry casting machine →Compare 0.2 MPa CDO-JP vacuum pressure casting machines with 0.4 MPa CDO-VP models for thin or fine-detail jewelry designs.
Compare CDO-JP and CDO-VP parameters →Use this jewelry vacuum casting machine range for gold, K gold, silver and copper alloys. Platinum needs specialized high-temperature equipment.
View platinum centrifugal casting machines →Choose manual or manual/automatic operation, then confirm voltage, cooling water, nitrogen or argon, vacuum piping and ventilation.
Read the jewelry casting operation guide →Verify chamber and flask dimensions, then size the supporting vacuum gypsum mixer and vacuum pump for the planned daily output.
Review the complete jewelry casting line →Use the published dimensions and weights, then allow safe clearance for loading, operation, cleaning and routine machine maintenance.
Browse CDOCAST equipment buyer guides →
The jewelry casting process as below picture shows
To learn all equipment in jewelry casting line 
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
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.
CDOCAST also offer solutions for high quality wax injection machine and dewaxing burnout oven
Pressurized casting improves density and non-porosity of castings
CDOCAST jewelry casting machine improve casting success and jewelry quality compared to conventional casting.
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.
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
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.
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.
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.
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.
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.
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.
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.
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
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.
– Crucible: ~50 uses – Graphite rod: ~30 uses – Thermocouple:Several months
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
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.
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
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.
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.
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.
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.
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.
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.
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.
