What are the challenges in achieving consistent wall thickness in molded WPC outdoor trash cans?

Achieving consistent wall thickness in molded Wood Plastic Composite (WPC) outdoor trash cans presents several significant manufacturing challenges. The primary difficulty stems from the inherent nature of WPC materials, which have a higher viscosity and different flow characteristics compared to conventional plastics. This can lead to uneven material flow within the mold, resulting in areas that are too thick or too thin. Variations in wall thickness can cause serious problems, including sink marks, warping, and reduced structural integrity, which are critical for durable outdoor products. The complex geometry of trash cans, often featuring deep draws and corners, further complicates uniform material distribution. Mold design is another major hurdle; improper gate placement or cooling channel layout can create inconsistent cooling rates, exacerbating thickness variations. Additionally, fluctuations in processing parameters like temperature, injection speed, and pressure must be meticulously controlled. Overcoming these challenges requires sophisticated mold engineering, precise process control, and a deep understanding of WPC material behavior to ensure the production of high-quality, durable trash cans capable of withstanding outdoor conditions.