38CrMoAlA Twin Screw Barrel And Sngle Screw Barrel For Recycling Machine
1 . Description
Our various type extruder conical twin screw barrel for different plastic raw material /domestic/foreign brand extruder machines.We also supply for domestic plastic machinery company.
Screw diameter:Φ15mm-Φ360mmL/D=15-56
Length of screw and barrel/cylinder:8000mm
According to different material and plastic products to design different screw structure ,compress rate and L/D.
According to different material and plastic products to design different Barrel with exhaust system and IKV force load system.
2 . Production Flow
Material cutting→peeling→hardening and tempering→rough turning→qualitative→semi fine turning→qualitative→nature stabilizing grinding→grinding→nitrogenization→lapping finish→CNC thread lathing→polishing till realize end product
3 . Technical Parameter
|
Base Material |
1)38CrMoAlA(JIS SACM645);2)Cr12MOV(JISSKD-11) ; |
|
Bimetallic Alloy Materials |
1)Fe-based alloy2)Ni-based alloy/Deloroalloy |
|
Double-alloylevel |
Level A - containing Tungsten of40% |
|
Surface Treatment |
Heat Treatment |
4 . Materials
Screw and barrel materials used 38CrMoALA steel,the quenching and tempering,qualitative, nitrogen,a polishing process,refined,with long life,wear resistance,good corrosion resistance,etc.,it can be used to replace foreign advanced equipment and Equipment domestic high-performance devices.
Specifications: Φ20mm- Φ300mm
Aspect ratio: L / D = 15-65
Materials and Technology:
1. 38CrMoALA nitriding treatment
Nitriding depth: 0.5-0.8mm, nitriding hardness: HV > 920
2. 42CrMo plating: high frequency quenching + plating/bimetal PTA+ plating
Chromium plating hardness: greater than or equal to HV800, thickness 0.03-0.05mm, roughness Ra0.2um
3. SKD61 conditioning, vacuum quenching and integral hardening treatment
Hardness index: HRC > 55-58, straightness 0.015mm/m, roughness ra0.4um
4. 9Cr18Mov vacuum quenching, CNC circular grinding
Hardness index: HRC > 50-55, straightness 0.015mm/m, roughness ra0.4um
5. hard chromium plating Specifications:
Chrome plating thickness: 0.05-0.10mm, chrome layer hardness: HV≥960
