In order to easily demold the product, ensure product accuracy, strength and ease of mold processing, the selection of parting surfaces should consider the following principles:
① In order to make the product easy to launch and simplify the ejection mechanism, the position of the parting surface should be such that the product stays in the lower mold as much as possible after opening the mold;
② Minimize the damage of the flash to the appearance of the product, and at the same time, it should be easy to remove the residual flash;
③ It is convenient for mold manufacturing and mold parts processing;
④For products with high radial dimensional accuracy requirements, the influence of flash thickness on product accuracy should be considered, and the vertical parting surface can be taken to ensure the product radial accuracy;
⑤Ensure the strength of the product and avoid sharp corners and thin walls.
The design of the parting surface is very important. The parting design should be carried out at the early stage of the mold design, and the parting design drawings should be drawn to ensure that the product can be demolded smoothly and easy to produce.