Bimetallic Parallel Twin Screw Barrel - Wear Resistant for PVC Extrusion
SEO Title: Bimetallic Parallel Twin Screw Barrel - Wear Resistant for PVC Extrusion
Meta Description: High-wear bimetallic parallel twin screw barrel with alloy hardness HRC50-65, depth 0.8-2.0mm, for PVC pipe/profile extrusion with CaCO3 fillers. ISO9001 certified.
URL Slug: bimetallic-parallel-twin-screw-barrel-pvc
Product Summary
This bimetallic parallel twin screw barrel features a wear-resistant alloy lining (HRC50-65, depth 0.8-2.0mm) applied over a tough base material. Designed for high-filler PVC extrusion, it withstands abrasive calcium carbonate compounds and extends equipment life significantly.
Key Selling Points
- Alloy Hardness HRC50-65 – superior wear resistance against highly filled PVC compounds.
- Alloy Depth 0.8-2.0mm – thick protective layer for prolonged service life (1-5 years).
- Bimetallic Design – combines tough backing with hard overlay, reducing cracking risk.
- Straightness ≤0.015mm – ensures uniform melt flow in PVC profile and pipe extrusion.
- ISO45001:2018 Certified – occupational health and safety management.
Technical Specifications
| Alloy Hardness | HRC50-65 |
| Alloy Depth | 0.8-2.0mm |
| Surface Chromium-Plating Hardness After Nitriding | ≥900HV |
| Chromium-Plating Depth | 0.025-0.10mm |
| Surface Roughness | Ra 0.4 |
| Screw Straightness | ≤0.015mm |
| Available Diameter Range | Φ45-Φ350 |
Models and Options
Available in diameters Φ45-Φ350. Bimetallic lining can be applied on nitrided base or directly on alloy steel. Custom overlay composition (e.g., Hastelloy, Inconel) on request.
Materials and Structure
Base material options: 38CrMoAl, 42CrMo, or 40Cr. Bimetallic overlay: specially formulated wear-resistant alloy with HRC50-65. This structure combines high toughness with extreme surface hardness.
Applications
Primary applications: PVC pipe, profile, and sheet extrusion using conical twin-screw extruders. Particularly effective for high-filler PVC compounds (e.g., CaCO3 up to 50%). Also suitable for other abrasive polymers like glass-filled nylon.
Customization
We customize barrel length, feed port, venting, and bimetallic layer composition. MOQ: 1 unit. Delivery: FOB/CIF. Payment: 30/70. Fast turnaround based on project urgency.
Case Study
Client: Extrusion & Injection Machinery OEM – required bimetallic barrels for PVC pipe extrusion machines. Our barrels achieved 100% dimensional consistency in batch delivery, enabling smooth machine assembly and commissioning.
FAQ
- What is the difference between bimetallic and nitrided barrels? – Bimetallic has a thicker, harder alloy layer (0.8-2.0mm, HRC50-65) vs. nitrided case (0.45-0.7mm, HV850-1000). Bimetallic is better for extreme wear.
- Is MOQ 1 unit possible for customized bimetallic barrels? – Yes, MOQ is 1 unit.
- What is the typical lifetime under PVC extrusion? – 1-5 years under normal high-filler conditions.
- Can you provide a sample before bulk order? – Samples can be arranged.
- What certifications do you hold? – ISO9001:2015, ISO14001:2015, ISO45001:2018.
- How long does delivery take? – Depends on complexity; contact sales for lead time.
- Do you ship internationally? – Yes, we export to EU, US, and over 50 countries.
Inquiry Information
Contact Martin: info@gmscrew.com | Tel: +86 13575629951 | WhatsApp: +86 13858143949
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