Conical twin screw barrel is one of important screw barrel. It have free drying, save energy, high output, extruder speed fast, producing film light more well than ordinary screw and barrel and so on excellent characters.

Size: Screw diameter; 20-500mm
Maximum screw length: 10000mm
Barrel inner bore diameter: ø 500mm

Material :
38CrMoAlA
40CrMo
42CrMo
High quality alloy steel

Technology: Nitriding treatment
Alloy coating sparying
Heating treatment
Screw fully hardening

Specification: Depth of nitrition layer 0.5-0.8mm
Nitriding treatment, surface hardness: HV≥ 900-1000
Fragility of nitrition: Less than grade 1
Surface roughtness: Ra 0.4um
Surface of hardness of nitrated Cr coating layer ≥ 950HV
Thickness of Cr coating layer: 0.03-0.08mm

Used for granulation, PP, PE, PA, PC, ABS, AS etc

We can manufacture various kinds of screw barrels according to the customers requirement