overmolding plastic injection mold (secondary molding) : a product has two kinds of plastic materials, injection molding in different injection machines, divided into two molding; After the product is injected from a set of molds, it is taken out of the mold and then put into another set of molds for a second injection molding. This process is usually completed by 2 sets of plastic injection mould, do not need a special two-color injection molding machine, the mold with the single color injection mold structure is the same, mainly by adjusting the flow rate of injection parameters to control the joint point of the product. Compared with the two-color mold, the mold cost and injection cost are cheaper. The products produced by the overmodling mold can play a more waterproof and sealing role. The plastic materials is mainly soft plastic materials and hard plastic materials, of which soft plastic materials is commonly used as silicone, TPU, TPR and other plastic materials, and hard

materials can be ABS, PC, PP and so on.