38CrMoAlA Blow Molding Machine Screw And Barrel

　　Product Description

　　The Screw structure and compression ratio can be designed according to different products & different output requirement.

　　Specification of screw and barrel:

　　Material:38CrMoAlA, 42CrMo(JIS SCM440), SKD11,61

　　Diameter:Φ15mm-350mm

　　Nitride Case Depth:0.5mm-0.8mm

　　Nitride Hardness:1000-1100HV

　　Nitride Brittleness:≤Grade One

　　Surface Roughness:Ra0.4um

　　Screw Straightness:0.015mm

　　Alloy Hardness:HRC68-72

　　The ratio of length to diameter: L/D=12-45

　　Types 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.

　　Application:It is widely used to cable , sheet , pipe , profile,etc.