Foam Injection molding is a process that produces foam parts and products by injecting molten plastic raw material into a mold. This process can be done with many different raw materials such as metals, glass, and typical thermoplastics and polymers. Thermoplastics like EVA foam are one of the most suitable materials for injection molding since they can be easily soften under high temperatures. They are also usable in a high variety of products and applications.

Injection molding machinery is indeed lager than other foam fabrication machines, but foam injection molding is not complicated as you expected. The raw material is heated at a very high temperature, and then injected under high pressure into a aluminum mold. The injected softened thermoplastic material will be expanded inside the previously-made tooling mold. After a certain amount of time, the softened material will turn to be solid slowly after cooling done. During this time, the expanded parts will usually be placed onto before made gauge which can help the expanded parts shrink to the sizes and forms as it is required.

EVA foam is the most frequently used thermoplastic for injection molding. After treated by injection molding technique, EVA foam can be made into various 3D shapes and sizes according to custom made mold tooling. Injection molding method can improve the strength and flexibility of foam products or parts. Injection molding foam products are used for a wide variety of industries and applications such as automotive, medical, packaging, construction and so on.