Detailed Explanation of the Working Principle of WPC Door Panel Extruder: The Complete Process from Raw Materials to Finished Products

The working principle of a WPC door panel extruder is actually an automated closed-loop process from raw materials to finished products. Xinhe Machinery helps you understand it clearly:

I. Core Process in Three Steps

1. Raw Material Mixing: PVC granules, wood flour, calcium powder, and additives are mixed at high speed and uniformly in the mixing system.

2. Extrusion Molding: The mixed materials enter the conical twin-screw WPC extruder, where the rotating screws propel the material forward. After heating and melting, the material is shaped.

3. Post-processing: The high-temperature extruded sheet enters a vacuum shaping die to control its dimensions. It is then slowly cooled by a cooling bracket to prevent deformation. Finally, it is smoothly conveyed by a servo traction system, and automatically cut to length by a flying saw.

II. Equipment and Process Details

1. Extruder: The main model uses a 92/188mm twin-screw diameter, with a total power of 110kw, and can stably produce 600 to 800kg per hour.

2. Vacuum Shaping: Precise control of cross-sectional dimensions ensures uniform door panel thickness. A 3 m-long cold mold ensures cooling and molding, while a 6 m-long vacuum forming table ensures stable production. Excessive length would double the difficulty of starting the machine, as the vacuum is only activated when the door panel reaches the traction machine.

3. Cooling and Deformation Prevention: Multi-segment cooling brackets slowly lower the temperature, effectively preventing product deformation. Cooling water temperature is controlled at 20°C.

4. Traction Cutting: A servo traction system provides smooth transport, and the flying saw automatically cuts to a fixed length, with a cutting error not exceeding 1mm.

Panel Transfer Machine: Servo automatic panel transfer machine.

III. Automation and Environmental Protection

1. Full Automation: The entire WPC door panel production line requires only 2-3 people to monitor, achieving continuous operation 24/7. Production capacity is doubled compared to traditional methods, while labor costs are halved.

2. Environmentally Friendly Design: The equipment design incorporates environmental protection concepts, achieving a win-win situation for both environmental protection and efficiency.