Hot/cold-feed rubber screw barrel for EPDM door, window and automotive seals. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Sealing strip lives or dies on profile consistency: a subtle surge in the screw shows up as a wavy seal. Our sealing-strip screws keep output flat with a steady metering section and temperature-controlled barrel zones matched to EPDM or sponge compounds.
Built for door and window gaskets, automotive glass-run and sponge seals on 60–150 mm cold-feed extruders. Send your compound family and line speed 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 | Ø60–150 mm |
|---|---|
| Feed type | Cold-feed (hot-feed on request) |
| L/D ratio | 10–16 for rubber duty |
| Material | 38CrMoAlA nitrided, polished channel |
| Barrel | Nitrided with heating/cooling zones |
| Output stability | Flat, surge-free metering |
| Lead time | 30–40 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 |
Start with the screw: worn flight lands pulse the metering section. We can often confirm from output readings and screw dimensions; send both and we will give an honest diagnosis.
The blowing agent needs gentle, even shear; we tune the compression and temperature zones so the cure/expansion stays predictable.
Yes — we build for the common cold-feed geometries from drawings or the worn parts.
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.
