Fourth, ribs
1. The reasonable application of reinforcing ribs can increase product rigidity and reduce deformation. Plastic mold processing
2. The thickness of the reinforcing rib must be ≤ (0.5 ~ 0.7) T product wall thickness, otherwise it will cause surface shrinkage. Injection processing
3. The slope of one side of the rib should be greater than 1.5 ° to avoid top injury. Injection moulding
Fifth, rounded corners
1. If the fillet is too small, it may cause stress concentration of the product and cause cracking of the product. Open mold injection processing
2. If the fillet is too small, it may cause stress concentration in the mold cavity and cause the cavity to crack. Plastic mold injection processing
3. Setting reasonable rounded corners can also improve the processing technology of the mold. For example, the cavity can be directly processed by R cutter milling to avoid inefficient electrical processing. Plastic parts
4. Different rounded corners may cause the movement of the parting line. Different rounded corners or clear corners should be selected according to the actual situation. Plastic mould parts
Sixth, hole
1. The shape of the hole should be as simple as possible, generally round. Plastic parts processing
2. The axial direction of the hole is consistent with the direction of mold opening, which can avoid core pulling. Injection processing
3. When the length-to-diameter ratio of the hole is greater than 2, the draft angle should be set. At this time, the diameter of the hole should be calculated according to the small diameter size (maximum physical size). Plastic processing
4. The length-to-diameter ratio of blind holes generally does not exceed 4. Anti-hole needle punching and bending. injection model
5. The distance between the hole and the edge of the product is generally greater than the aperture size. Audio shell plastic