For rubber strainer machines filtering compound before calendering. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
A strainer pushes compound through a screen pack to pull out contamination before calendering or moulding. The screw works against real back pressure, so it is built heavier than a standard extrusion screw.
Hardfaced flights, heavy-duty barrel, and a head interface machined to your strainer.
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 | Ø60–250 mm |
|---|---|
| Build | Heavy-duty for back pressure |
| Flight treatment | Hardfaced lands |
| Material | 38CrMoAlA / 42CrMo |
| Head | Machined to your strainer head |
| Screen pack | To your specification |
| Lead time | 35–45 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 |
Yes — send the head drawing or dimensions and we machine the interface to fit.
Straining runs against screen back pressure, which loads the flight lands hard. Hardfacing is what keeps the screw in tolerance.
Either. Most customers replace the screw; if the bore is worn we quote the set.
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.
