Vacuum Casting

Quality Vacuum Casting Service

Vacuum casting is one of the most cost-effective option that is applied to test your low-volume design.
Tolerance of silicone mold reaches around±0.1MM while that on finished parts reaches +-0.15MM.
If the size of vacuum casting parts is more than 1M, the tolerance on the parts is +-0.2MM.

Popular Vacuum Casting Materials and Finishing

1. Create the Master Model

  • The master model serves as the reference for creating the mold.
  • It is typically made using 3D printing (like SLA or SLS) or CNC machining.
  • The model is often crafted from durable materials like resin, plastic, or metal, ensuring it can withstand the mold-making process.

2. Prepare the Master Model

  • Polish or coat the model to achieve the desired finish on the final parts.
  • Secure the model in a casting box with proper alignment for mold creation.

3. Create the Silicone Mold

  • Use liquid silicone material for the mold.
  • Pour silicone around the master model in a casting box, ensuring all details are covered.
  • Allow the silicone to cure, typically in a vacuum chamber to remove air bubbles and ensure detail accuracy.
  • Once cured, carefully cut the mold to remove the master model, creating a cavity for casting.

4. Prepare for Casting

  • Close the mold and secure it to prevent leakage.
  • Ensure proper air vents to allow trapped air to escape during casting.
  • Choose a casting material (e.g., polyurethane resin) based on the desired properties.

5. Casting

  • Mix the resin components and degas them in a vacuum chamber to remove air bubbles.
  • Fill the mold cavity with resin.
  • Use a vacuum chamber to remove air from the mold, ensuring bubble-free casting.
  • Allow the resin to cure in the mold, following the material’s specifications (may involve room temperature or heat curing).

6. Demold the Part

  • Open the mold carefully to extract the cast part without damaging the mold or the part.
  • Check for defects or imperfections and trim any excess material.

7. Post-Processing

  • Sand, paint, or coat the part as needed for the desired aesthetic and functional qualities.
  • Quality Control:

8. Repeat for Multiple Parts

The silicone mold can typically be reused for up to 20-30 castings, depending on the complexity and material used.

Rubber, similar ABS/PP/PC/PE are among the choices. Color palette caters to your needs as well.

We use a vacuum to mold a molten material. This process is used when the material is fiber, or wire-reinforced.
Polyurethanes and silicone molds are two essential components are used in this process to create high-quality prototypes or end-use products.

Metal liquid casting is one that cools and solidify liquid metal. Other types includes Vacuum die casting,Sand Casting,Centrifugal casting,Low-pressure casting.

Limited Material Options
The range of materials available for vacuum casting is narrower. This can restrict the mechanical, thermal, or chemical properties achievable in the final parts.
Durability and Lifespan of the Mold
Silicone molds used in vacuum casting have a limited lifespan, typically 20–30 cycles, depending on the complexity and material used.
Cost Inefficiency for Large Volumes
Vacuum casting is not economically viable for high-volume manufacturing due to the manual and iterative process.
Size Limitations
The size of parts that can be created is constrained by the size of the vacuum chamber and mold.
Not Suitable for Highly Detailed Parts
Silicone molds may lose fine detail over repeated cycles or with intricate designs.This can compromise part accuracy and surface quality.