Screw Element
Segment element for twin extruder
What is the PM-HIP technologic way?
PM-HIP, that is in order to process high-alloy in powder metallurgy (PM) techniques way into high-density composite materials by hot isostatic pressing (HIP), as below:

Till now there are only a few companies in world could use this advanced PM-HIP techniques in plastic machine parts process field, specially to make HIP bushs inside segment barrels ID of Twin screw extruders.
PM-HIP Fumace in company ⇒
Selection of Alpha's PM-HIP aloys
| Alloy |
Base |
Hardness |
Wear resistance |
Corrosion resistance |
Thermal expansion |
Alloy Elements
(Weight- %) |
| Alpha 101A |
Fe |
58 ~ 64 |
 |
 |
12.1 |
Cr:20 |
V:8 |
C:2.5 |
| Alpha 201A |
Co |
52 ~ 54 |
 |
 |
11.9 |
Cr:28 |
W:15 |
C:2.5 |
| Alpha 301A |
Co |
58 ~ 60 |
 |
 |
10.5 |
Cr:35 |
W:20 |
Mo:2.5 |
Segment screw, kneading disk that is nitrided, or high-speed steel quenched

Bush form inside Segment barrel ID

HPL gearbox
HPL gearbox for co-rotating twin screw extruder could bear high torque and high screw speed, it is the most advanced drive way all over the world for twin extruder. The radial force on output axes is zero so that its carrying capacity and service life could be raised up maximum. The bearings inside gearbox is adopted SKF from Sweden and INA from Germany, our gearbox could be used in high dependability, long service life, high screw speed and high torque way.
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