Plastic Lumber Extrusion Line for 50mm Solid Thick Panels

Yongte Conducts Initial Trial Run of Plastic Lumber Extrusion Line for 200 x 50mm Solid Thick Panels, Optimizes Die Molding Section to Resolve Deformation Issues

1. Overview of Initial Equipment Trial Production

Recently, Yongte successfully completed the inaugural trial production of its advanced Plastic Lumber Extrusion Line, targeting the processing of 200 x 50mm solid thick plastic panels. Adhering to the concept of resource recycling and green production, this trial run adopted recycled plastic scraps as the raw material, verifying the equipment’s adaptability to waste plastic materials and the feasibility of mass production of thick-gauge plastic lumber.

2. Excellent Plasticization Performance of Recycled Materials

During the initial commissioning process, the high-speed extruder delivered exceptional melt plasticization performance. Under precise extrusion parameter control, the recycled plastic scraps were fully melted and homogenized, with the molten material presenting uniform texture, good fluidity and stable overall plasticizing effect. The excellent plasticization quality lays a solid foundation for the stable production of high-performance recycled plastic panels and proves the outstanding material processing capacity of Yongte’s extrusion equipment for waste plastic raw materials.

3. Analysis of Panel Bulging and Deformation Defects

Nevertheless, targeted technical challenges emerged in the forming stage of ultra-thick solid panels. Due to the substantial 50mm thickness of the finished product, there is a prominent temperature gradient between the surface and the core layer of the panel during the cooling and shaping process. The surface of the thick panel cools and solidifies rapidly, while the internal core material retains high temperature for a longer period and undergoes continuous thermal shrinkage during subsequent natural cooling. The inconsistent cooling and shrinkage speed between the outer and inner layers induces unbalanced internal stress, ultimately resulting in middle bulging and local deformation of the 200×50mm solid thick panel, which affects the flatness and dimensional accuracy of the final product.

4. Die Molding Section Optimization Solutions

Based on in-depth analysis of the trial run data and on-site production conditions, the Yongte technical team has confirmed that the core solution focuses on the structural optimization of the die molding section. Aiming at the unbalanced melt flow and uneven cooling shaping problems of ultra-thick plates, the team will carry out targeted upgrades on the die flow channel structure, flow distribution system and cooling layout. By optimizing the melt flow resistance of the molding section, balancing the material feeding speed of the middle and edge areas of the die, and matching with graded and uniform cooling design, the internal stress concentration of thick panels will be effectively eliminated. This optimization will synchronize the cooling and shaping speed of the surface and core layer of the product, fundamentally solve the middle bulging deformation defect of 50mm ultra-thick solid panels, and improve the overall dimensional stability and flatness of finished products.

5. Trial Run Summary and Subsequent Development Plan