Extrusion Kit 20mm Dia Screw and Drilled Barrel with Nozzle for DIY Extruder 3D

Description

20mm Dia Single Extruder Screw, 300mm Length Barrel and 1.75mm or 3mm Nozzle
for Desktop Plastic Extruders
Package contains:
1x 20mm Dia Screw, 1x Drilled Barrel, 1x 2.5mm/3mm/1.75mm
Nozzle
(
plz leave a note for the caliber you need
), 3x 150W D40L40 Band Heaters,
3x K-Type Thermocouples.
Technical Parameters:
Productivity: 0.1~0.5kg/h
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)
Main Alloy Materials
1.Ni-based alloy/Deloro alloy
2.Tungsten carbide/Wolfram carbide
3.NiCo-based alloy
4.Fe-based alloy
5.Co-based alloy
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:
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 not nitrided(plz contact us or leave a note if you need nitrided process)
and the nozzle is carbon steel.