Direction and parting line of New Car injection molding products

When designing each New Car injection molding product, its mold opening direction and parting line must be determined first to ensure that the core pulling slider mechanism is minimized and the impact of the parting line on the appearance is eliminated. After the mold opening direction is determined, the product's reinforcement ribs, buckles, protrusions and other structures are designed to be consistent with the mold opening direction as much as possible to avoid core pulling to reduce the seam line and extend the mold life.

After the mold opening direction is determined, an appropriate parting line can be selected to avoid undercuts in the mold opening direction to improve the appearance and performance. Appropriate demolding angle can avoid product hair pulling (drawing). The demolding angle of the smooth surface should be ≥0.5 degrees, the fine leather grain (sand surface) surface should be greater than 1 degree, and the rough leather grain surface should be greater than 1.5 degrees. Appropriate demolding angle can avoid product top damage, such as top whitening, top deformation, and top breakage.

When designing deep cavity structure products, the outer surface slope should be greater than the inner surface slope as much as possible to ensure that the mold core is not offset during Fuel Car injection molding and obtain uniform production. Various plastics have a certain wall thickness range, generally 0.5 to 4 mm. When the wall thickness exceeds 4 mm, it will cause the cooling time to be too long, resulting in shrinkage and other problems. Changes to the product structure should be considered. Uneven wall thickness can cause surface shrinkage. Uneven wall thickness can cause pores and weld marks.