In general, the injection molding material belongs to the [thermoplastic material] - is in the screw barrel inside the high temperature plasticization - in the mold inside the low temperature to cool down in the mold inside the high temperature solidification, forming. The biggest difference between the two is the injection molding material properties, thermosetting and thermoplastic difference, so the screw design is also based on this feature to design, Bakelite screw - small aspect ratio, low compression, no reverse ring, Meson, the use of the overall style, the general choice of material JY Yang JY wear-resistant corrosion-resistant alloy.