... to meet customer's demand. Injection molding machine screw ( screw nozzle for injection screw & barrel )DiameterΦ15mm-Φ500mmDesigningScrew structure and compressionratio can be ... MaterialThe Finnished Product Processing Requirments38CrMoAla, SACM645, 42CrMoNitriding Treatment42CrMo, AISI4140Hard chrome coated layerCr12MoV, SKD11, SKD61, YXMI, EFZD,DC53, SKH55, SKH59, SKH58, SKH51 ...