All You Need to Know about Vacuum Casting

Vacuum casting is a useful and economical processing way to make low-volume plastic components. The finished plastic parts are the same as the prototypes. And you can see its applications in many fields: medical devices, consumer goods, automotive bumpers, aerospace parts, decorative components, etc.


vacuum casting parts

What is the process of vacuum casting? 

Before making vacuum casting parts, we need a few prototypes produced by CNC machining or 3D printing. The clients can also send a few samples to the suppliers to make vacuum casting parts. After that, hang a prototype on the parting line in the mold casting frame and put liquid silicone rubber into it. It creates a silicone mold. Once the liquid silicone solidifies, we cut the mold along the parting line, remove the prototype, and seal the mold.

Vacuum casting for functional modelsThe next step is casting resin. We mix the casting resin up with specified colors. Under vacuum, pour the mixed resin into the mold carefully in case of any voids.

When casting resin is done, put the mold into the dedicated oven and solidify it. Then, we can take the part out of the mold and continue making parts.

The common materials used in vacuum casting: ABS, PP, PA, PC, PMMA, Rubbers, etc.

There are several benefits if you choose vacuum casting to make plastic parts: lower cost, quick processing, and high repeatability. Meanwhile, it gets some disadvantages: short lifespan and high shrinkage.

As to Ruitai’s capability, we can help you make low-volume vacuum casting parts from 10 pcs to 200pcs. The biggest size we can make reaches 2.5m*1.4m*1.2m, the smallest one, 5mm*5mm*5mm.

Ruitai team is glad to assist your project anytime as long as you send us 3D files.


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