Taking an injection mold as an example, its operational process generally comprises several stages: mold closing, injection, holding, cooling, mold opening, and part ejection. The mold features an internal runner system designed to guide molten plastic into the mold cavity, the shape of which corresponds to that of the final product.
The structural design of the mold must account for plastic flow characteristics, cooling uniformity, and ease of demolding. For instance, employing a hot runner system keeps the plastic within the runners in a molten state-preventing premature solidification-thereby enhancing material utilization and production efficiency. Meanwhile, the design of the cooling system directly impacts the molding cycle time and the extent of product deformation.