Bimetallic-lined twin screw barrel for recycled PVC pipe, profile and board duty. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Recycled PVC carries grit, paint and unknown filler — in a twin barrel the wear concentrates at the feed and compression zones. Our bimetallic twin barrels line exactly those zones, so the barrel ages where the compound actually flows.
Built for conical (51/105–80/156) and parallel twin extruders running recycled PVC pipe, profile and foam board. Send the extruder model and recycled percentage and we quote.
Quote within one business day. We reply with a matching proposal, delivery date and price — no generic catalogue PDF.
Standard range shown. Every dimension below can be changed to your machine, resin and output — custom manufacturing is our daily business.
| Models | Conical 51/105–80/156; parallel classes |
|---|---|
| Lining | 2–5 mm alloy, zone-lined |
| Duty | Recycled PVC pipe / profile / board |
| Service life | 3–5× nitrided on recycled feed |
| Bore finish | Honed Ra 0.4 |
| Lead time | 35–50 days |
The honest answer depends on your resin, not on price. Here is how we advise customers.
| Gas Nitrided (38CrMoAlA) | Bimetallic Alloy Lining | |
|---|---|---|
| Best for | Unfilled PE, PP, PS, ABS, virgin PVC | Glass-filled, mineral-filled, recycled, corrosive |
| Surface hardness | HV 900–1020, depth 0.45–0.7 mm | Alloy layer 2–5 mm, metallurgically bonded |
| Typical service life | Baseline | 3–5× baseline on abrasive resin |
| Cost | Lower | Higher, recovered through fewer stoppages |
| Certification | MTC with heat number | MTC + hardness records, third-party on request |
Full-bore lining costs more; zone lining covers the feed and compression wear. For heavy recycled duty we recommend full bore — the metering zone wears too, just later.
Yes — we copy the barrel flange, cooling and dowel layout from the old barrels.
Available and recommended — a new bore with a worn screw wastes half the investment.
Alloy-lined barrel bore for recycled, filled and corrosive materials.
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Custom flanged barrel for extrusion and injection machines.
View Details →Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
