Parallel twin screw barrel tuned for rigid PVC profile lines and stable gelation. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Profile lines live on gelation consistency: one shift of melt temperature and the corners crack in the field. Our profile screws hold a flat gelation point across the shift with a profile-specific compression curve and gentle tip shear.
Built for window and door frames, siding, skirting and cable trunking on 55–96/188 class parallel twins. Send your extruder model and profile family 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 | Ø55/110–96/188 mm classes |
|---|---|
| Design | Profile gelation curve, low tip shear |
| Material | 38CrMoAlA nitrided HV 900–1020 |
| Barrel | Nitrided or bimetallic for filled compounds |
| Melt uniformity | Stable gelation across shift |
| 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 |
It can contribute: unstable gelation shows up first as brittle welds and corners. A profile-specific compression curve stabilises the melt; we will also ask about your formulation and die, because the cause is sometimes there.
Yes, the compression and metering must be tuned so the blowing agent expands predictably. Mention 'foam core' in your enquiry and we adjust the profile.
Yes — if your barrels still measure in tolerance we machine screws to match the existing bore.
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.
