... Barrel Molybdenum Alloy Screw Barrel Bimetallic Single Screw Barrel For Injection Molding Machine For good plasticizing effect,we have different designs of screw ... of screw Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation type,exhaust type,pin ... type,mixed type,double-head type,three-head type,multi head type etc. ...