Short lead time, low cost, low probability of processing failure. each mold can be used to cast for 20 or more copies with the look, feel and durability of finished products, it’s a good choice for producing low volume or prototypes rapidly. Greatly reduce the cost, cycle and risk of product development. It has the lowest unit cost of any rapid prototyping process.
The first step in the vacuum casting process is to create a master pattern, we normally use 3D printing or CNC Machining to create the master pattern for silicone molding, also you can provide the real sample as master pattern.
The second step is to make silicone mold, the pattern is encased in quick-curing liquid silicone to form a cavity within the mold, which will be used to form the urethane part. After the mold cures, it is cut in half and the pattern is removed. The cavity formed by the master pattern is then used for casting the end product.
Then the third step is to casting copies, Pouring the liquid gum material into the empty cavity of silicon mold in vacuum state, once dried, the parts have finished. The mold is durable for approximately 20 copies.
Available for a wide range of materials selection, we can cast your parts in many grades of plastic material including PP, ABS, PC, Acrylic, POM, Rubber, Transparent Rubber etc.
Due to the influence of expanding with heat and contracting with cold, the accuracy of vacuum casting is not easy to control, generally only at 0.2mm.