20mm Dia Single Extruder Screw, 300mm Length Barrel and 1.75mm or 2.5mm Nozzle
for DIY Desktop Plastic Extruders Machine
Package contains:
1x 20mm Diameter 305mm Length Screw
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:
Picture:
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.
And as in the same dimention, the bigger power, the higher heating temperature.e.
