Bimetallic Conical Twin Screw Barrel for Extruder PVC

  • Based Material: 38CrMoAlA
  • Warranty: 12 months
  • Application: all kinds of plastic machine
  • surface roughness: Ra 0.4 um
  • alloy depth: 2-5 mm
  • cooling system: oil cooling or water cooling
  • straightness: 0.015 mm/m
  • hardness after nitriding: HV950-1200
  • depth of nitrided layer: 0.6-0.9mm
  • Alloy hardness: HRC62-68
  • Product Detail

    Product Tags


    1. bimetallic conical twin screw barrel for extruder machinery.

    2. Base Material: 38CrMoAlA;

    3. Nitrided or bimetallic

    Product Name conical twin screw barrel
    Base Material (steel) 38 CrMoAlA(JIS SACM645); 42 CrMo(AISI 4140);

    Cr12MoV(JIS SKD-11); 4Cr5MoSiV1(JIS SKD-61)

    Process ( hot treatment) Nitriding treatment 72 hours

    Bimetallic treatment

    Hardness after hardening and tempering HB260-320
    Nitrided Hardness HV950-1050
    Nitrided Case Depth 0.5 - 0.8 mm
    Nitrided Brittleness Less than Grade 2
    Surface Roughness Ra 0.4
    Screw Straightness 0.015 mm
    Bimetallic Hardness HRC 53-65
    Bimetallic Depth 0.8-2.0mm for screw ;  3~5mm for barrel
    Chromium plating Depth 0.05~0.10mm
    Hardess of surface chromium-plating after Nitriding HV≥950HV


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    Conical twin screw barrel specification
    Φ22/45 Φ35/75 Φ40/80 Φ45/90
    Φ45/97 Φ50/105 Φ51/105 Φ55/110
    Φ60/125 Φ65/120 Φ65/132 Φ70/143
    Φ70/150 Φ80/143 Φ80/156 Φ90/188
    Φ92/188 Φ95/190 Φ105/191 Φ100/200
    1. The above is standard sizes, if your conical twin screw barrel size didn’t mentioned above, please contact me & we will give you best solution for it!
    2. We provide Cincinnati, Battenfeld, Krauss Maffei, Amut, BAUSANO, Weber designing.
    Conical twin screw barrel application
    1) PVC pipe extrusion line;                       

    2) PVC sheet extrusion line;

    3) PVC & WPC profile extrusion line;      

    4) PVC granulation line;

    5) PVC foaming production line;

    The raw material can be new and recycle, the material can compound calcium powder 5% - 300%. 



    Q1: Is your company manufactory or trading company?
    A: We are manufactory.
    Q2: Can you produce customized screw barrel according to our own designing?
    A: Yes, of course we can.
    Q3: We have no completely drawing, can I give you connection size and your company do designing for us?
    A: Yes, glad to serve for you.
    Q4: We have no drawing, we can’t provide you connection sizes, how can I buy from you?
    A: We can send engineer to take measurement for you. It is ok~
    Q5: We bought screw barrels from machine suppliers before, how about your quality compare with them?
    A: 90% machine suppliers buy screw barrel for screw barrel supplier and then assembling machines, in this field, we are more professional than them. The quality will be better than them,but price is cheaper.
    If you have questions I didn’t mentioned above, please feel free contact me, I will be glad to reply you promptly within 24 hours! Thanks a lot!
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