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Save You Cost By Vacuum Casting Method

Vacuum casting, also called polyurethane casting, it is a good method to satisfy your low volume production needs at a low cost, you can have 10 or several hundred custom parts in a short time, it is one of Prototyping China processes.

Vacuum casting is suitable for low volume manufacturing. Comparing with investing a steel or aluminum mold, the cost of silicone mold is much less. We may just need 1/3 or less cost to get your small volume plastic parts. Also the lead-time for vacuum casting is short, it will be a good for you to have a quick turnarround.


There are several steps for the Vacuum Casting process.


1. Make a master part by CNC machining or 3D printing, post finish is necessary if the casting part needed in gloss or texture.


2. Create a silicone mold.

a: Make up the silicone according to the instruction, then discharging the moisture content under vacuum condition.

b: Make a custom box, the size of that box should be 20mm bigger than the master part.

c: Fix the master part into the box, then pour the prepared silicone into the box. Discharge the moisture again under vacuum condition.

d: It takes 1 to 4 hours to cure the silicone under 60~70 degrees Celsius in the oven. Then we split the mold by knife and take out the master part, the finish on master will be transferred onto cavity.

Mold life time ranges from 10 to 20 shots varies base on the part geometry and casting material.

Prototyping China, vacuum casting Vacuum Casting

3. Casting the part. Most of plastics are available in Prototyping China, technical parameters for Casting part:

casting materialPolyurethaneBrand: AXSON, Hei-cast.

casting material Type: ABS-liked, PP-liked, PA-liked, PMMA-liked, etc, Rubber40~90 shores.

part cured time: 30~60 mins depend on the part size and casting material & conditions.

part tolerance: +/-0.2mm/100mm.

casting wall thickness: minimum at 0.5mm, 1.5mm to 5mm is good for casting.

maximum casting size: 2000mm x 1200mm x 1000mm.

If you are interested in vacuum casting, contact us to learn more about.

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