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Conical twin screw barrel

About Qiyu

All kinds of screw barrels produced by our company are made of 38CrMOALA alloy steel. After quenching and tempering, finishing, and surface ammoniation treatment, they can also be electroplated (hard chromium plated on the surface), and the screw surface is sprayed with double alloy. The barrel surface uses the advanced production process of bimetallic technology, the centrifugal casting method, so that the products have high wear resistance, corrosion resistance, improve life and other advantages, and can replace imported products.

Conical twin screw barrel

Product materials

Alloy-Steel of High-Quality
38CrMoALA(JIS SACM645)
42CMo(JIS SCM440)
9Cr18MoV
CW6Mo5Cr4V2

Heat treatment

Nitriding treatment
Electroplated hard chromium layer
High frequency quenching
Spray corrosion resistant and wear-resistant bimetallic layer
Vacuum quenching

Technical indicators

Nitriding layer depth:0.5~0.8mm
Nitriding hardness:950~1020HV
Nitriding embrittlement:Less than grade 1
Surface roughness:Ra 0.4um
Screw straightness:0.015mm
Double alloy hardness:HRC55-62
Double alloy thickness:>2mm

Screw type
For different plastic properties, screws with different structures can be selected to improve the plasticizing effect, such as gradual, abrupt, wavy, barrier, double screen, shunt, separate, exhaust, pin, mixed, double headed, triple headed, multi headed, etc.

Screw and barrel specifications

Specification(d/D)
Working length(mm)
Extrusion ability(Kg/h)
Rotation speed of screw(rpm)
Φ35/Φ77
810
40-70
5~50
Φ45/Φ90
990
50-80
5~45
Φ50/Φ105
1070
100-150
4~45
Φ51/Φ105
1220
100-150
4~45
Φ55/Φ110
1220
120-180
4~40
Φ60/Φ125
1320
150-200
4~40
Φ65/Φ120
1440
200-250
4~40
Φ65/Φ132
1440
200-250
4~40
Φ70/Φ140
1460
220-300
4~40
Φ75/Φ150
1480
250-300
4~35
Φ80/Φ143
1800
300-360
4~35
Φ80/Φ156
1660
300-360
4~35
Φ92/Φ188
2000
400-500
4~35

 

Product application scope

PVC plastic steel profile
PVC resin tile, PE corrugated pipe
PVC, PE, PP wood plastic profiles
PVC, PP, PE, PC, ABS and other profile extrusion
PVC wood plastic (foam) door panel, decorative board and other wide plate
PS, PET, PC, PMMA, TPU and other profiles

Zhoushan Qiyu Machinery Co., Ltd

Zhoushan Qiyu Machinery Co., Ltd. is a professional manufacturer of screw and glue cartridge in China. The company has strong technical force, advanced process equipment, production facilities and perfect testing facilities to ensure that the production quality meets the requirements. From various screw design: alloy spray welding to various specifications of single screw, tapered, parallel twin-screw; Production of PVC, EVA, TPR, TR, screw, barrel, etc. All of them are of high standard and precision and have won the trust of customers.

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