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  • Users: specmario
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  1. specmario

    roving area

    I'd like to ask you, how to determine number of rovings for pultruded profile. I know the surface of pultruded profile, the diameter of one fiber is 16 micrometers. How many fiber is in one roving usually? In composit will be cca 70% of glass fibers, 30% of resin. Could you help me? It is...
  2. specmario

    Torque calculation

    It is known some formula for screw torque calculation during extrusion? I'm looking for this for longer time. Thank you
  3. specmario

    Vent port position

    What is the right vent port position in vacuum extruder? I'm going to use barrier ring in front of degassing section. I suppose, 2D should be enough distance between barrier ring and vent port. Or it should be closer? It is 120mm extruder, and vent port dimensions are L=1D, W=0,5D. Thank you...
  4. specmario

    vacuum extruder pump

    Could somebody help me, how to calculate optimal suction power of vacuum pump for rubber blend degassing. It is 120mm extruder, common rubber blends on the base of NR, IR, SBR and carbon black filled. Thank you.

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