Today, the most commonly used methods of molding liquid silicone rubbers are injection and compression molding.

The silicone molding process is different from that of thermoplastics in a few different aspects. To mold a part, thermoplastic resin is heated in the barrel, and injected into a cold mold. Silicone molding of a part requires the liquid rubber to be kept cool in the barrel and injected into a heated mold. The design and fabrication of the silicone tooling is very different from that of thermoplastic tooling as well. Tolerances, venting, and part ejection are examples of tooling design aspects that differ. Although the tooling design is different, optimizing such processing variables such as temperature, pressure, and time are essential in both thermoplastic molding and silicone molding processes.

Here are a few examples of Silicone Molding:

The Y Boot Design requires no flash at the cores intersection therefore a disposable core is used. This type of silicone molding is possible because of the elasticity of silicone.