Feeding unit:Specification 60mm-250mm
Material leakagerate≤0.05%
Extruding wave≤1%
Abrison rate ≤1m/3years
Company Introduction
We are specializing in producing screw and barrel for both pin-type cold-feed and hot-feed extruder. In the past 15 years, our company has risen to become one of most professional feed rubber screw and barrel producer in China with the most advanced technology.
Standard
Diameter:φ20-φ300mm
Ratio of length to diameter:L/D=15-55
Materials
38CrMoAIA/SACM645/SKD11/SKD61/42CrMo
Duplex stainless Steels
GH3#
Power Metallurgy Raw Material
Cold/Thermal Spray Hard Metal Process
Advanced Nitriding Process
Corrosion&Abrasion Resistance Bimetal Spraying Process
Technical Index
| Product |
Screw&Barrel |
| Tempering hardness |
HB240-280 |
| Hardness of nitrogen treatment |
HV950-1000 |
| Depth of nitrogen layer |
0.55-0.70 |
| Nitride brittleness |
Less than grade 1 |
| Surface roughness |
Ra 0.4 |
| Screw straightness |
0.015mm |
| Hardness after nitride |
≥900HV |
| Chromium-plating depth |
0.05-0.10mm |
| Alloy hardness |
HRC55-62 |
| Alloy Depth |
1.5-2.0mm |
Production Process as below:
01 Blanking-02 Quenching and Tempering-03 RoughTurning-04 Detecting-05 Semi Finishing Turning-06 Aging Treatment-07 Rough Grinding
08 Crossed Thread-09 Milling Cutter Roove-10 Turning Thread Groove-11 Tempering-12 Polishing Thread Groove-13 Fine Gringding-14 Milling Keyway-15 Fitter-16 Detecting-17 Nitriding or Bimetallic Treatment-18 Cut Off Process Allowance-19 Polishing Thread Groove-20 Detecting
Our Service
Warranty and service: 1years
Our Advantages
1)Excellent raw materials
2)Good customer service
3)Rapid delivery
4)Reasonable price
5)Production quickly
Audited Supplier 
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