Parallel twin screw barrel for rigid PVC dry-blend and cable-compound pelletising. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Compounding asks the screw to do more than gel PVC: it must disperse stabiliser, filler and plasticiser evenly and hold the compound's heat history tight. Our compounding screws use a dispersing metering section tuned to your formulation.
Built for rigid PVC dry-blend pelletising, cable compounds and calcium-zinc stabilised systems. Tell us the formulation family and pelletiser type and we match the geometry.
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 | Ø51/105–92/188 mm classes |
|---|---|
| Design | Dispersive metering for compound uniformity |
| Material | 38CrMoAlA nitrided / bimetallic option |
| Hardness | HV 900–1020 nitrided |
| Compound families | RPVC, PSC, cable, Ca-Zn systems |
| Lead time | 30–45 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 |
Parallel twins give a longer metering zone and steadier output at higher throughput, which suits pelletising duty; conical remains fine for direct profile and pipe extrusion.
Yes — Ca-Zn is more shear-sensitive; we flatten the compression curve and recommend polished channels.
Extruder model, screw outer dimensions or drawing, formulation family and target output.
For PVC pipe, profile and WPC extrusion on parallel twin-screw lines.
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Flight-profiled, match-marked pair for even plasticising.
View Details →Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
