Planetary screw barrel for rigid PVC pipe, fitting and profile feed applications. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Where rigid PVC needs gentle, thorough gelation — heat-sensitive formulations, high transparency, heavy filler — the planetary stage delivers without the shear heat of twin screws. We build matched planetary sets for pipe, fitting and profile feed duties.
Send your application and planetary section dimensions; we match spindle count, bore and drive interface.
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 | Ø100–250 mm typical |
|---|---|
| Design | Full-bore rolling kneading, low shear |
| Material | 38CrMoAlA nitrided / bimetallic bore |
| Gelation | Thorough at low melt-temperature rise |
| Applications | Pipe, fitting, profile feed |
| Lead time | 40–55 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 |
If the cause is shear heat, often yes: planetary kneading gels at a lower temperature rise. We will ask for your formulation and current melt readings before promising it.
We build from drawings or measurements of the existing section — spindle profile, bore and drive interface.
Typically the spindles' rolling surfaces and the bore at the feed zone; both are renewable in our workshop.
For planetary roller extruders in rigid PVC compounding and calendering.
View Details →
Central spindle with helical flights matched to the roller set.
View Details →
Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
