Equipment Features of 3-Layer Stretch Film Extrusion Machine

1. Independent Triple-Screw Extrusion System

The core of the machine features a robust triple-screw configuration. Unlike simplified systems, each screw is driven independently, allowing for:

• Dedicated Plasticizing: Precise temperature and RPM control for each distinct layer.
• Material Versatility: Capability to process various resins (LLDPE, mLLDPE, PIB) simultaneously without cross-contamination of melt properties.
• Thermal Stability: Optimized melt quality through individualized heating zones.

2. Advanced Multi-Layer Feedblock and Die

Equipped with a precision-engineered co-extrusion feedblock, the machine ensures:

• Layer Ratio Precision: Accurate control over the thickness of the A, B, and C layers, allowing for ultra-thin sticky outer layers and a heavy-duty core.
• Laminar Flow Control: Prevents interface instability, ensuring a seamless bond between layers even at maximum output speeds.
• Gauge Uniformity: A high-precision T-die ensures consistent transverse and machine-direction (TD/MD) thickness.

3. Sophisticated PLC Control & Smart HMI

The entire extrusion process is managed via a centralized PLC-based control system:

• Real-Time Monitoring: Integrated sensors track melt pressure, motor load, and line speed.
• Automated Parameters: Intuitive HMI interface allows for rapid recipe storage and real-time adjustment of cooling and tension parameters.
• Precision Cooling: Controlled vacuum box and chilling roller systems ensure rapid solidification for maximum film transparency.

4. High-Speed Automatic Dual-Station Winder

To maintain high-efficiency production cycles, the machine includes:

• Non-Stop Roll Change: Fully automatic cutting and turret winding for uninterrupted operation.
• Constant Tension Logic: Advanced tension control sensors eliminate roll deformation and ensure uniform winding hardness.
• Edge Trimming & Recycling: Integrated online edge-trimming systems for immediate material reprocessing.

Technical Performance Results

• Enhanced Puncture Resistance: Strategic A/B/C "sandwich" structure maximizes the mechanical strength of the core layer.
• Superior Cling & Clarity: Dedicated outer-layer extrusion ensures high tackiness and excellent optical properties for scanning and inspection.
• Material Efficiency: High tensile strength allows for significant down-gauging, reducing raw material consumption per linear meter.