20mm Dia Single Extruder Screw, 300mm Length Barrel and 1.75mm or 2.5mm Nozzle

for DIY Desktop Plastic Extruders Machine

Package contains: 

1x 290mm Length Drilled Barrel with 1x 2.5mm/1.75mm Nozzle

3x 110V 150W D40L40 Regular Mica Band Heaters

3x K-Type 0.5meter M6 Thread Thermocouples.

Technical Parameters:

Suit for HDPE, LDPE, LLDPE, PVC, PP, glass fiber, PPS, PPA and other special plastic recycling.

Maximum rotation speed: 60RPM

Maximum heating temperature: 450℃
Bimetallic layer depth: 3 mm
Bimetallic hardness: 57~69HRC
Hard-chrome plating hardness after nitriding: ≥950HV
Chrome-plating layer depth: 0.03-0.09mm
Surface roughness: Ra 0.4
Compression Ratios:  20mm extrusion screw is 2.8

Technical Information:

Main Base materials
1.38CrMoAlA (SACM645)
2.SKD-61 (Special Tool Steel)
3.42CrMo (Ultrahigh Strength Steel)
4.DC53 (Cold Work Die Steel)
5.W6Mo5Cr4V2 (High-Speed Tool Steel)
Processing Techniques
1. Heat treatment
2. Quenching
3. Bimetallic alloy welding for screw
4. Bimetallic alloy centrifugal casting for barrel
5. Hard-chrome electroplating
6. Linearity of screw:0.015mm

Drawing:

CAD files are available.

Screw:

Barrel:

Q: What the difference between Stainless steel Mica heaters and Brass ones?

A: The Brass heaters have the advantages of faster heat transferring, higher wear of resistance and longer service life.