The so-called parting surface is the product surface determined when the upper and lower die parts are separated, it is an important factor in the plastic injection mold structure and it is also an important step before the plastic injection mold starts, but because the structure of different products is different, so it is also a very complicated problem. When we choose, we should try to grasp the main factors and give up the secondary factors. Reduce the complexity of mold structure as much as possible, increase the die strength and die life.

The most important thing is to ensure that the product can be successfully removed, this is also the purpose of our design, thus it is best to design a plane in a vertical direction, it is best not to affect the concave and convex shape of the mold so as not to affect the demoulding.

Minimize the depth of the mold cavity. At present, the machining of the plastic injection mold cavity is basically EDM, the longer the cavity is, the longer the processing time will affect the production cycle and increase the production cost. The deeper the cavity is, the thicker the mold is. The longer the stroke of the plastic injection machine is. So as far as possible to reduce the mold cavity depth.