Vacuum Casting is a prototyping process that enables you to produce photorealistic parts, closely resembling a plastic injection molding in a matter of days.
We can produce a wide variety of textures and colors and offer other finishes, such as painting and plating. We use high-quality polyurethane formulations meant to simulate the material properties of real plastic resins such as Nylon, ABS, PC, POM, and more. View materials >>
Advantages of Vacuum Casting
- Perfect for making functional prototypes and market testing.
- Economical for producing small batch runs of parts to validate your design before scaling up to injection molding.
- Fantastic resolution and detail, simulating injection molding.
- Silicone rubber parts with a range of shore hardness’s available.
- Over-molding available.
We produce a model using Stereolithography (SLA) according your 3D CAD data.
2. Model Finishing
We carefully remove supports from the model, sand the part, and apply the desired surface texture.
3. Make a Silicone Rubber Tool
According to the customer’s recommendation about the gate location, build a custom sized box based on the customer’s part size and suspend the master model in the box.Then pour thoroughly mixed RTV silicone into the box with the part suspended inside after that cure it for overnight.
4. Removing the Mold
After curing is complete, disassemble the box, and carefully remove the tool based according the agreed parting line. Create ridges in the tool as removing the tool to facilitate alignment during the casting process. The master model is then removed from the tool, leaving with a completed silicone mold.
5. Casting PU
After fully cured of mold, mix the vacuum casting material thoroughly and pour into the mold using a funnel. After pouring the material, machine pulls vacuum, which compress air bubbles. Upon release of the vacuum the bubbles quickly expand and vent out of the mold through vent holes. The part then cured in the oven.
During de-molding, excess flash, material sprue, and vents will be carefully removed from the part by our technicians.
The parts are ready to use or prepared for post finishing processes such as painting, vacuum metalizing (Plating), or any other required process.
8. Quality Control and Delivery
Our quality technicians then perform a final inspection before sending parts to our shipping department where we carefully pack the parts for final delivery.