For planetary roller extruders in rigid PVC compounding and calendering. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Planetary roller extruders plasticise gently across a large surface area, which is why rigid PVC calendering lines rely on them. We build the spindle, rollers and barrel as a matched set so the geometry stays consistent.
Supplied nitrided, with bimetallic options for filled formulations.
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.
| Configuration | Spindle + roller set + barrel |
|---|---|
| Material | 38CrMoAlA nitrided |
| Application | Rigid PVC compounding and calendering |
| Geometry | Matched as a set |
| Finish | Precision ground and polished |
| Options | Bimetallic lining |
| Lead time | 45–60 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 |
Large surface area, gentle shear and short residence time — exactly what heat-sensitive PVC needs.
Usually yes. Spindle, rollers and barrel wear together; mixing new and worn parts gives uneven plasticising.
Yes — machine model, or send the worn parts for measurement.
Central spindle with helical flights matched to the roller set.
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Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
