What should you pay attention to when designing injection molds

Opening direction and parting line Each injection molded product must first determine its mold opening direction and parting line at the beginning of the design to ensure that the core slider mechanism is minimized and the parting line's influence on the appearance is eliminated. After the mold opening direction is determined, the product's ribs, buckles, protrusions and other structures are designed to be as consistent as possible with the mold opening direction to avoid pulling the mold core to reduce the seam line and extend the molding time. The life of the mold.
After determining the mold opening direction, you can choose the appropriate parting line to avoid kickback in the mold opening direction, thereby improving the appearance and performance. Proper drafting of the draught angle can prevent the product from being pulled (stretched). The smooth surface of the draft should be ≥0.5 degrees, the surface of fine particles (sand surface) should be greater than 1 degree, and the surface of rough particles should be greater than 1.5 degrees.
Appropriate draft angle can prevent the top of the product from being injured, such as whitening, deformation of the top, and burst. When designing deep cavity structure products, the slope of the outer surface should be greater than the slope of the inner surface as much as possible to ensure that the mold core does not deflect during injection to obtain uniform product wall thickness and ensure material strength.
Product wall thickness Various plastics have a certain wall thickness range, generally 0.54mm. When the wall thickness exceeds 4mm, it will cause too long cooling time and cause shrinkage and other problems. Consider changing the product structure. Uneven wall thickness causes surface shrinkage. Uneven wall thickness can cause pores and weld lines. Reinforcement Proper use of ribs can increase product stiffness and reduce deformation.
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