Starting design of plastic mold injection products

Each plastic mold injection product must first determine the target of the mold opening and the parting line when designing, to ensure that the core pulling mechanism and the elimination of the external impact of the parting line are minimized.
After the purpose of the mold opening standard is set, the structure of the product’s reinforcing ribs, buckles and protrusions should be designed to be consistent with the goal of the mold opening standard as much as possible to avoid core pulling to reduce the stitching line and delay the mold life.
After the target of the mold opening standard is set, the appropriate parting line can be selected to improve the appearance and function.
Demolding slope
Appropriate stripping slope can avoid product pulling. The mold release slope of the smooth mold should be greater than 0.5 degrees, the fine skin pattern should be greater than 1 degree, and the rough skin pattern should be greater than 1.5 degrees.
When designing deep cavity structure products, the external profile slope is required to be less than the internal profile slope to ensure that the mold core is not biased during injection, to obtain an average product wall thickness, and to ensure the material density strength of the product tooth opening.
Product wall thickness
All kinds of plastics have a certain wall thickness scale, generally 0.5 ~ 4mm, when the wall thickness exceeds 4mm, it will cause too long cooling time, shrinkage and other problems, should consider changing the product structure.
Uneven wall thickness will cause the profile to shrink.
Uneven wall thickness can cause porosity and weld marks.