Material Available:
Nitrided Steel: 42CrMo, 38CrMoALA, etc
Cool work steel: D2, SKD61, 9Cr18MoV etc.
Heat resistant steel: SKH51, GH113 etc.

Working process:
Raw Material - Quenching & Tempering - Rough Machining - Semi finish Machining - Finish Machining - Nitriding Treatment - Bimetallic Casting - Inspection - Finish Products

Technology Index:

Barrel Surface Roughness	Ra0.4um	Nitriding Layer Hardness	HRC950-1020
Barrel Straightness	0.015mm	Nitriding Fragility	< = Grade one
Inner Diameter	Φ14-Φ300 X 8000mm	Screw Straightness	0.0015mm
L/D Ratio	L/D=8-20	Cr-Plating Layer Depth	0.03-0.08mm
Screw Surface Roughness	Ra0.4μm	Bimetallic Layer Depth	>2.0mm
Nitriding Layer Depth	0.5-0.8mm	Bimetallic Layer Hadness	HRC55°-72°

Material: Cold feed rubber screw and barrel: Specification: Ф40-Ф300MM
L/D Ratio: 8-20
Hot feed rubber screw and barrel: Specification: Ф30-Ф250MM
L/D ratio: 4-8
Pin-rubber screw and barrel: Specification: Ф60-Ф250MM
L/D ratio: 12-18
Screw types:
You can choose different structures of the screw according to different plastic material, which can increase the plasticizing effect, such asgradual, mutant, wavy, double-screen, distributary, separating, exhausting, pin type, mixed, double screws, three screws.