XPS screw barrel for graphite-enhanced black board with even dispersion duty. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Graphite board sells on uniform dark colour and fine cells — both are dispersion results. Our graphite-duty screws add a dispersive section that folds graphite evenly without shear-heating the melt, and the barrel keeps the temperature zones flat.
Built for grey/black XPS producers serving insulation markets that demand the better lambda value. Send the board spec and line data and we quote.
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 | Ø90–250 mm typical |
|---|---|
| Compound | Graphite-enhanced XPS |
| Design | Dispersive section for even graphite folding |
| Material | Nitrided; bimetallic option |
| Board quality | Uniform colour, fine cell structure |
| 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 |
Both are common: uneven graphite dosing or a screw without proper dispersive folding. We will review the feed point and propose the profile that fixes it.
Mildly abrasive; nitrided handles most duty, bimetallic for high-throughput lines.
Yes with purge discipline; the screw profile works for both.
Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
