This JCD 51/105 nitrided conical twin screw barrel is dedicated to plastic profile extrusion equipment—including PVC door/window frames, decorative profiles, and plastic heteromorphic profile extruders. Adopting 38CrMoAlA alloy steel + precision nitriding treatment, it’s optimized for the 51/105 tapered diameter specification, ensuring uniform plasticization of PVC profile materials (even low-filler formulations). Verified by profile manufacturers, it reduces profile surface defects (scratches, unevenness) by 80% and maintains stable dimensional accuracy (±0.1mm) for long-term continuous production.

Its core advantage lies in the nitrided surface’s wear resistance + matched intermeshing twin-screw structure, which balances material conveying efficiency and plasticizing quality—ideal for medium-scale plastic profile production lines.

Q: What types of profiles can this screw barrel process?

A: It’s mainly designed for PVC door/window frames, decorative profiles, and common plastic heteromorphic profiles—suitable for most rigid PVC profile formulations.

Q: Why choose nitrided treatment for profile extrusion?

A: Nitriding enhances surface wear resistance, which reduces screw wear when processing PVC profile materials (with slight abrasiveness) and maintains stable plasticizing performance for 12,000+ working hours.

Q: How to match it with my existing 51/105 profile extruder?

A: We support dimension customization based on your extruder’s installation parameters (shaft diameter, length, thread pitch)—just provide the equipment drawing, and we can deliver a fully compatible screw barrel.

With 72-hour quenching + 168-hour nitriding, the JCD 51/105 conical twin screw barrel achieves precise dimensional matching and stable plasticization. It solves the core pain points of poor profile surface quality and unstable dimensional accuracy in medium-scale profile extrusion, becoming a cost-effective choice for PVC profile manufacturers.