Vacuum complex molding is a relatively common processing method in hand-board production. Its working principle is to firstly use CNC machining or 3D printing to make the original plate, and then the master craftsman will process the original plate and then use the original plate to make silicone molds. A process of mass replication with molds. The performance of vacuum composite molding materials can simulate the performance of most existing engineering materials, such as PU, PC, PP, Saigon, high-temperature resistant ABS, etc. At the same time, it can also replicate transparent parts, plexiglass, thermoplastic elastomers and various soft materials, etc. Silica gel composite mold is mainly used for the small batch production of a plastic prototype. There are dozens to hundreds of products. It is more cost-effective to use a composite mold for processing. Product replication is not affected by volume, complexity, and various structures. It is easy to open the mold, the cycle is short, and the effect is quick.