1. The lateral clamping force of the mold is relatively small, so for a large product with a large projected area, the direction of the large projected area should be placed in the front and rear mold opening and closing directions, and the side projected area should be small. As a lateral typing.
2, in line with product release requirements
The parting surface is also for the smooth removal of the mold from the product. Therefore, the location of the parting surface should be selected at the location where the product has the largest section size. This is the most basic principle.
3, the shape of the parting surface
In general products, a parting surface perpendicular to the mold opening direction of the Injection Molding machine is often used, and in other special cases, other shapes are used. The shape of the parting surface is based on the principle of convenient processing and demoulding. Like some of this curved product, it has to bend its curvature when it is typed.
4, to ensure product appearance and quality
The parting surface should not be selected on the smooth outer surface of the product. The appearance of the surface is generally not allowed to have clips and other lines that affect the appearance of the appearance; some products with concentricity requirements, the concentricity of the required part of all on the same side, so as to ensure its concentricity.
5, the determination of position
When deciding the orientation of the product in the mold, the selection of the parting surface should be to prevent the product from forming side holes or side buckles, and complex mold structures should be avoided.
6, is conducive to demoulding
The mold release mechanism of the general mold is in the moving mold, so when selecting the parting surface, the mold opening product should be left in the movable mold as much as possible. So for some places that may stick to the fixed mold, we often add a fixed mold assisted mold release mechanism.
7, consider the lateral mold opening distance
The general lateral mechanical opening distance is relatively small. Therefore, when selecting the parting surface, the direction of the core length should be selected in the direction of opening and closing of the front and rear molds, and the short direction should be used as the lateral type.
8, mold parts easy to process
When selecting the parting surface, the mold should be divided into easy-to-machine parts, reducing the machining difficulty.
9, conducive to exhaust
When the parting surface is used as the main exhaust, the parting surface should be designed at the end of the plastic flow to facilitate the exhaust.
10. R classification
For mold design type products, there is a full circle of R angles on the parting surface. At this time, the parting type has to take into account the best R type, and the sharp side cannot appear.
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