Screw compression ratio is designed according to different raw materials and different products.
Technical index:
Material selection of high quality 38 chromium molybdenum aluminum (38CrMOALA)
Surface hardness: HV:≥290
Nitriding hardness: HV950 ~ 1000
Nitriding depth: 0.45 ~ 0.7mm
Brittleness nitride: ≤ first order
Surface roughness: Ra0.4
Screw straightness: 0.015mm
After nitriding surface chromium plating hardness: ≥900HV
Chrome plating thickness: 0.05 ~ 0.10mm
Double alloy hardness: 60-70 HRC
Application field:
The opposite direction parallel twin screw can be processed PVC pipe: used in real estate pipeline, urban water supply, drainage pipe system; Special-shaped wood, plate (sheet) : plastic steel doors and Windows, wood plastic, floor, stair handrail, interior decoration modification and hard and soft PVC granulation.
