In the screw industry, commonly used screws are 45 # st […]
In the screw industry, commonly used screws are 45 # steel, 40Cr steel (chrome-plated), 38CrMoAIA nitriding steel. If your product is + glass fiber. When using chrome plating, it will gradually fall off after about 3 months, and color difference will appear. The best choice is nitriding. Stainless steel screw cannot be made of + glass fiber. Generally, non-special materials use more common screws. Such as PC \ PMMA \ PA and other materials. The compression section of the screw must be long. The abrupt screw is generally used to produce crystalline plastics. The long compression section is good for melting and effect of the material. In addition, small shear does not cause excessive local temperature. And the rocket head of the screw head is also very important.
The material of the double alloy screw barrel is made of high-quality SACM645 alloy steel as the base material, and the top of the thread is welded with the imported bimetal layer; the bimetal barrel is made of high-quality 38CrMoALA as the base material, which is subjected to quenching and tempering; Double alloy screw barrel: with wear resistance, corrosion resistance, high temperature resistance, high pressure resistance, suitable for lens, transparent shell, cosmetics container, transparent acrylic, nylon, PVC, PC, PPA, PPO, PPS, PA6T, LCP, ABS fireproof, bakelite, PC + glass fiber, nylon + glass fiber, magnetic powder, ceramic powder, aluminum-magnesium powder, iron powder, electric injection molding machine, etc. can also be designed and customized according to the requirements of the user processed products.