Commonly used screws in the market are No. 45 steel, 40cr steel (chrome plated), and 38CrMoAlA nitrided steel. If your product is +glass fiber. When using chrome plating, it will slowly fall off after about 3 months, and the color difference will appear. Nitriding is best. Stainless steel screw cannot be made of glass fiber. Generally, ordinary screws are used for nonspecial materials. Such as PC\PMMA\PA and other materials. barrel…

Each plastic has an ideal plasticizing temperature range, and the extruder screw barrel processing temperature should be controlled to make it close to this temperature range. Granular plastic enters the barrel from the hopper and first reaches the feeding section. Dry friction will inevitably occur in the feeding section. When these plastics are not heated enough and melted unevenly, it is easy to increase the abrasion of the inner wall…