Question - corner warping in large HDPE parts

Hi, to give the most effective advice, of course, it’s better to analyze your particular part's design and conditions applied. However, general advice would be optimizing mold design to ensure uniform mold temperature and strategic placement of gates and ejection pins. Adjust processing parameters like injection pressure, packing pressure, and cooling times to ensure even filling and cooling. Ideally better to enhance the cooling system by placing cooling channels to promote even cooling, particularly near the edges and thicker sections. Consider introducing additives such as fillers to enhance dimensional stability. Utilize simulation tools like Moldflow to predict and address warping issues. Consider using sequential valve gating for precise control over the plastic flow, reducing internal stresses. Also ensure the ejector system is balanced to prevent deformation during part ejection, which might involve repositioning or adding more ejector pins.