Custom Extrusion Coating Line Manufacturers & Product Solutions

In pressure-type tooling, the molten polymer makes contact with the substrate inside the die body under substantial hydrostatic melt pressure. This approach forces the polymer into the interstitial spaces of braided wires, cables, or knitted fabric sleeves, maximizing mechanical adhesion. In contrast, tubing-type (draw-down) tooling extrudes a larger hollow polymer tube that is drawn down onto the substrate core outside the die lips, often aided by internal core vacuum sizing. Tubing tooling is preferred for smooth loose-jacket applications (such as optical fiber buffers or flexible push-pull automotive cables) where the outer skin must not adhere aggressively to the core.

Extruding high-melt polymers like PA12 (220°C–250°C) or fluoropolymers (300°C+) onto sensitive inner cores risks thermal softening or core collapse. We address this through engineered thermal zones: water-cooled internal core-guiding guiders, short interfacial exposure zones within the cross-head, and high-efficiency spray quench tanks placed immediately downstream of the die orifice. Furthermore, precise multi-axis dancer tension feedback maintains balanced axial load on the core substrate to eliminate stretching or necking.

Yes. By employing barrier screws featuring optimized Maddock mixing sections and variable compression ratios, our extruders accommodate a range of polyolefins (PE, PP), engineering urethanes (TPU), and thermoplastic vulcanizates (TPV). For operations transitioning between low-melt PVC and high-temp PA, we supply interchangeable screw assemblies and quick-release bimetallic barrels treated with tungsten carbide coatings for wear and chemical corrosion resistance.

We integrate dual-axis or four-axis non-contact laser micrometers (Zumbach or Sikora) directly into the downstream cooling troughs to measure outer diameter and ovality at kilohertz frequencies. For high-spec automotive and medical applications, ultrasonic wall-thickness monitors track outer jacket thickness and concentricity across 4 or 8 peripheral points. This data links to the central PLC to adjust servo haul-off speeds and extruder RPM automatically via closed-loop feedback.

Our standard protocol includes three stages: First, dry-run mechanical and electrical validation in Haian; second, a full Factory Acceptance Trial (FAT) running customer materials under target line speeds; third, on-site commissioning by BAOD field technicians at your plant. This process includes mechanical leveling, water/electrical hookup verification, PLC parameter tuning, and comprehensive training for maintenance and operating crews.