Injection-grade rubber screw barrel with precise shot dosing for molded rubber parts. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Rubber injection needs a screw that plasticises evenly, doses precisely and resists the compound's abrasion — all while the material is scorching on a clock. Our injection screws pair a fast-recovery profile with tight-clearance dosing and anti-stick polishing.
Built for rubber injection machines from 100 to 1500 t, including bushings, vibration isolators, O-rings and molded hose. Send the machine model and compound and we match the set.
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 | Ø30–120 mm |
|---|---|
| Design | Fast-recovery, precise dosing profile |
| Material | 38CrMoAlA nitrided / bimetallic for filled compounds |
| Clearance | Tight dosing clearance, matched per set |
| Compounds | NR, SBR, NBR, EPDM, FKM-class |
| 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 |
Usually yes: dosing clearance opens as flight lands and bore wear. Send the screw and bore measurements; we will tell you whether a re-cut or a new set is the economical route.
For high carbon-black or mineral loading, a bimetallic barrel extends life considerably; for unfilled compounds nitrided is sufficient.
Yes — from nameplate data, drawings or the worn set.
For hot-feed rubber extruders — hose, profiles and cable covering.
View Details →
Cold-feed barrel with temperature-control jacket options.
View Details →
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.
