Hot/cold-feed rubber screw barrel for tyre tread, sidewall and preform extrusion. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Tread compounds are stiff, heavily filled and temperature-critical: the screw must move them at volume without scorching. Our tread-duty screws use a deep-channel, warm-feed profile with zone-controlled barrels sized for preform output.
Built for tread, sidewall, bead apex and innerliner preform extruders. Tell us the compound and preform cross-section and we match the set.
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.
| Screw diameter | Ø90–250 mm |
|---|---|
| Feed type | Hot-feed or cold-feed, warm-feed profile |
| L/D ratio | 8–14 for heavy rubber duty |
| Material | 38CrMoAlA nitrided, deep hardened |
| Barrel | Nitrided with heating/cooling zones |
| Lead time | 35–45 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 |
Modern tread lines are cold-feed for temperature control; hot-feed survives in older preformer lines. Send your extruder layout and we match it.
Yes — up to Ø250 in this family; our Ø300 barrel capacity covers most preform lines.
Where the wear allowance allows, we re-cut and re-nitride; we will quote both routes honestly when your parts arrive.
For hot-feed rubber extruders — hose, profiles and cable covering.
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Cold-feed barrel with temperature-control jacket options.
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Pin-barrel set for better mixing and lower melt temperature.
View Details →Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
