Product Overview

Its core advantage lies in a 45mm high-torque screw with variable length-to-diameter ratio (16:1 to 25:1), allowing seamless adaptation to thermoplastic materials ranging from rigid PVC to soft LSZH compounds. The line’s modular architecture simplifies reconfiguration for wire diameters (0.5–10mm) and insulation thicknesses (0.1–3mm), making it equally adept at small-batch prototyping (e.g., medical wire samples) and high-volume production (e.g., automotive harnesses). A closed-loop PID temperature control system with 8 heating zones ensures ±1°C accuracy, eliminating hot spots that cause material degradation and reducing scrap rates to ≤2%.

Product Specifications

Screw Diameter: 45mm (high-chrome alloy construction for wear resistance)

Maximum Output: 150 kg/h (PVC) / 120 kg/h (PE) / 90 kg/h (LSZH)

Material Compatibility: PVC (70–90 Shore A), PE (LDPE/HDPE), LSZH, TPU, Nylon 6/66

Power Consumption: 55 kW (with energy recovery during cooling phases)

Control System: Siemens S7-1200 PLC with 10.1" touchscreen HMI; supports recipe storage (50+ profiles)

Die Head Type: Interchangeable single-layer/dual-layer co-extrusion dies with precision centering (±0.01mm)

Cooling System: Multi-stage water bath (3 zones) with automatic temperature (20–60°C) and flow control

Applications

Automotive Wires:

Produces thin-wall insulation (0.15–0.8mm) for automotive harness wires (e.g., TXL, GXL types), meeting UL 1426 (flame resistance) and ISO 6722 (temperature cycling: -40°C to 125°C). Supports multi-core cable extrusion with tight diameter tolerance (±0.03mm) for sensor and infotainment systems.

Building Wires:

Ideal for low-voltage (LV) household cables (BV, BVR, RVV types) with flame-retardant PVC insulation, compliant with GB/T 5023 (mechanical properties) and BS 6004 (smoke density index ≤75). Enables color-coded insulation via integrated masterbatch dosing.

Electronics Industry:

Delivers micro-thin insulation (0.1–0.3mm) for USB 3.0/HDMI cables and aerospace signal wires, ensuring dielectric strength ≥25 kV/mm and low signal attenuation (<5% at 10 GHz).

Specialty Cables:

Processes high-temperature materials (silicone rubber, PEEK) for medical devices (e.g., ECG cables) and aerospace wiring, withstanding continuous operating temperatures up to 200°C and autoclave sterilization cycles.

FAQ

Q: Can the SJN-45 handle recycled materials without quality loss?

A: Yes, its high-shear screw design with mixing sections disperses contaminants in post-industrial recycled plastics (up to 40% content), maintaining insulation integrity and meeting RoHS requirements.

Q: What is the minimum wire diameter it can insulate reliably?

A: With the optional micro-die set, it insulates wires as small as 0.5mm (e.g., enameled copper conductors for electronics) with consistent wall thickness.

Q: How efficient are material changeovers?

A: The quick-release die head and self-cleaning screw reduce changeover time between materials (e.g., PVC to PE) to 20–30 minutes, supported by automated purging cycles.

Q: Does it include in-line quality inspection?

A: Yes, it integrates laser diameter gauges (±0.001mm accuracy) and high-voltage spark testers (up to 15kV) for real-time defect detection, with automatic alarm and shutdown triggers.