【JL SCREW】 Conical Screw and Cylinder

Product Detail Information


JL SCREW have rich experience on manufacturing Conical Twin Screw Barrel for PVC pipe, PVC sheet, PVC film, PVC profile, PVC granules, PVC (micro) foaming, soft PVC, WPC+PVC, raw material compound high percents calcium poeder, recycle material etc.

Every JL Conical Screw & Barrel is made of high quality materials, with heat treatment, high-frequency quenching, nitriding treatment, precision grinding / bimetallic alloy welding, hard-chrome electroplating. These advanced technics are ensuring our products having many great characteristics, especially in dimensional accuracy, wear-resisting, lifetime, prevention of corrosion.

Our reliable and helpful Screw & Barrel is your best choice!
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Terms and Conditions:
Means of transport: Ocean, Air, Express
Production time: About 20-30 days after we receive the advanced payment

Production Process:
Receiving orders — > Designing & Drawing confirmation — > Blanking Thermal refining — > Heat treatment — > Rough Turning — > Polishing — > Drilling for barrel — > Semi Finishing Machining — > Bimetallic welding — > Centrifugal casting for barrel — > Polishing — > Nitriding treatment(120 hours) or High frequency quenching — > Hard-chrome plating — > O. D. Grinding — > Honing for barrel — > Alignment — > Polishing — > Inspecting — > Packing & Shipping
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Technical Information: 

 

Specification:

22 / 4535 / 7540 / 8045 / 9045 / 9750 / 105
51 / 10555 / 11058 / 12560 / 12565 / 12065 / 132
70 / 14370 / 15070 / 15880 / 14380 / 15680 / 172
90 / 18892 / 18895 / 190105 / 191100 / 200

( We can customize screw & barrel according to customers' requirements. The compression ratio of screws can be designed according to different products and ingredients. ) 

 

Base Materials
1. 38CrMoAlA (JIS SACM645)
2. 42CrMo (AISI4140)
3. 4Cr5MoSi V1 (JIS SKD-61)
4. DC53 (JIS G4404) 
5. Cr12MoV (SKD11) 
6. 9Cr18MoV (Stainless Steel)
 
Bimetallic Alloy Materials:
1. Ni -based alloy
2. Fe-based alloy 
3. Co-based alloy 
4. NiCo-based alloy 
5. Tungsten  carbide
 
Processing Technics:
Heat treatment
High-frequency quenching
Nitriding treatment
Bimetallic alloy welding
Bimetallic alloy centrifugal casting
Hard-chrome electroplating
 
Technical Parameter:
Nitriding layer depth: 0.5 - 0.8mm
Nitriding hardness: 900 - 1000HV (55 - 65HRC)
Nitriding brittleness: Grade 1
Surface roughness: Ra0.4
Linearity of screw: 0.015mm
Bimetallic layer depth: 3 mm
Bimetallic layer hardness: 55 - 70 HRC
Hard-chrome plating hardness after nitriding:  950HV 
Chrome-plating layer depth: 0.03 - 0.10mm

 

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  • -JL SCREW- Conical Screw and Cylinder



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