Single extruder screw and barrel
Small size 16mm or 20mm extruder screw and barrel for desktop plastic extruders
Main Base materials
2.SKD-61 (Special Tool Steel)
3.42CrMo (Ultrahigh Strength Steel)
4.DC53 (Cold Work Die Steel)
5.W6Mo5Cr4V2 (High-Speed Tool Steel)
Main Alloy Materials
1.Ni-based alloy/Deloro alloy
2.Tungsten carbide/Wolfram carbide
1. Heat treatment
3. Nitriding treatment
4. Bimetallic alloy welding for screw
5. Bimetallic alloy centrifugal casting for barrel
6. Hard-chrome electroplating
7. Linearity of screw:0.015mm
Nitriding layer depth:0.5-0.8mm
Bimetallic layer depth:3 mm
Hard-chrome plating hardness after nitriding:≥950HV
Chrome-plating layer depth:0.03-0.09mm
Surface roughness:Ra 0.4
Mini Single Screw Diameter from 16mm,18mm,20mm to 40mm
Common Single Screw 45mm,50mm,55mm,60mm,65mm,70mm,75mm, 80mm,85mm,90mm,95mm,100mm,110mm-220mm
Suit for HDPE, LDPE, LLDPE, PVC, PP, glass fiber, PPS, PPA and other special plastic recycling.
Blanking→Rough Machining→Quenching & Tempering →Semi Finishing Machining→Finish Machining→Nitriding or Bimetallic Treatment→Detecting→Finished Product →Debugging After The Sale
Advantages of screw barrel:
Advanced nitriding technology: we have our own nitriding oven equipment.
Duplex alloy spraying technology
High corrosion & abrasion resistance to prolong lifetime of screw and barrel
Special alloy powders being sprayed and welded on the screw's ridge/flight,and use different alloy and welding methods for the screw of different functions. For good plasticizing, it has many designs to meet customers' demand. Such as granular type, mutant type, wave type, barrier type, double screen type,shunt type, separation type, exhaust type and so on.
The screw barrel are going to be upgraded to Stainless Steel
The barrel for 16mm extruder screw is designed for 35mm diameter band heater. Barrel for 20mm single screw will adopt 40mm diameter mica band heater.
Compression Ratios: 16mm extrusion screw is 2.5 and 20mm extrusion screw is 2.8