Gold Member Since 2011
Audited Supplier

Ningbo Cowell Industry Co., Limited

Screw Barrel, Extruder Screw Barrel, Injection Screw Barrel manufacturer / supplier in China, offering High Capacity Hydraulic Impact PVC Sheet Crusher Machine, PA Screw Barrel for PA Processing, Round Cooling Tower with High Performance and so on.

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Bulletin Board

FAQ [Oct 27,2015]

How to choose screw and barrel?

1. Determine the diameter of screw,length of screw, outer diameter of barrel

2. Checking plastic material and plastic type,new plastics or recycled material?

3. Confirm the steel material grade, nitriding grade,bimetallic grade or Tungsten carbide grade, which is based on anti-wear ability and hardness.

4. Making drawings of screw and barrel,or ask technician from factory about available drawing

5.Choosing good factory to manufacture screw and barrel.


How to measure peformance of extrusion screws?

1.Throughput rate

2.Melt temperature and temperature uniformity

3.Spiral or straight Maddock mixing section for dispersive mixing

4.Melt quality and mixing uniformity

5.Stability of output, pressure and temperature

6.Power consumption


What is standard feed Screw construction features?

1.Chrome plating in root

2.Wear resistant full flight width Colmonoy 56, 83, X830, or UCAR

3.Spiral or straight Maddock mixing section for dispersive mixing

4.Pineapple, Saxton, or pin mixing section for distributive mixing

5.Highly polished streamlined surfaces

6.High quality materials and construction (manufactured from aircraft quality 4140, 4340, stainless steel or Duranickel)