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 220V 150W D40L40 Regular Mica Band Heaters
3x K-Type 0.5meter M6 Thread Thermocouples.
Technical Parameters:
Productivity: 0.1~0.5kg/h，20g per shot
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:
FAQs:
Q: What is the recommended speed for the screw?
A: About 21~35 rpm.
Q: The material of screw, barrel & nozzle?
A: The screw is made of SKD61 vacuum quenching, barrel is 38CrMoAlA nitrided
and the nozzle is carbon steel.
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.