Common screw on the market have 45 # steel, 40 cr steel (chrome plated), 38 crmoaia nitriding steel. If your product is + glass fiber. When using a chrome plated will gradually fall off, about 3 months after occurrence chromatism. Had better choose nitriding. Stainless steel screw do + glass fiber. Generally the special materials are chosen on the ordinary screw more. Such as PC, PMMA, PA etc. Screw compression section must be long. Mutations in the shape of the screw are commonly used to production of crystalline plastics. Long compression section of the melting of material and the effect is very good. And shear small will not lead to local temperature is too high. And screw head rocket head is also very important.

The double alloy screw material adopts the high quality SACM645 alloy steel as the base material, and the top of the thread is welded with the imported bimetal layer.The double metal cylinder adopts high quality 38CrMoALA as the base material, and is processed by the adjustment.Cylinder bore centrifugal casting metal, receives double alloy screw cylinder: has wear-resisting, corrosion resistance, resistance to high temperature, high pressure, suitable for, lens, transparent shell, cosmetics container classes, transparent acrylic, nylon, PVC, PC, PPA, PPS, PA6T, LCP, PPO, ABS fire, bakelite, PC + + glass fiber, glass fiber, nylon powder, ceramic powder, aluminum magnesium powder, iron powder, electric injection molding machine and so on, also can produce products according to user requirements to design customized.