The lateral clamping force of the mold is relatively small, so for a large product with a large projection area, the direction of the large projection area should be placed in the direction of the front and rear mold opening and closing, and the side of the side projection area should be smaller. To the type.
2. Meet the product release requirements
The parting surface is also for the product to be able to take out the mold smoothly. Therefore, the position of the parting surface should be selected in the part with the largest product section size, which is a basic principle.
3. Shape of the parting surface
In general products, a parting surface perpendicular to the direction of the mold opening movement of the injection molding machine is often used, and in other cases, the parting surface of other shapes is used. The shape of the parting surface is based on the principle of easy processing and demolding. Like a bent product, the shape must be based on the curvature of its curvature.
4. Ensure product appearance and quality
Do not select the parting surface on the smooth outer surface of the product. In general, the appearance of the surface is not allowed to have lines and other lines that affect the appearance of aesthetics; some products with concentricity requirements, all parts with the same degree of concentricity should be placed on the same side, so as to ensure their concentricity.
5. Determination of position
When determining the orientation of the product in the mold, the selection of the parting surface should try to prevent the product from forming side holes or side buckles, and complicated mold structures should be avoided.
6. Conducive to demoulding
The mold release mechanism of the general mold is all in the movable mold, so the product should be left in the movable mold as much as possible when selecting the parting surface. Therefore, for some places where it is possible to stick to the fixed mold, we often add a fixed mold assisted demolding mechanism.
7. Consider lateral mold opening distance
The distance of the general lateral mechanical mold opening is relatively small. Therefore, when selecting the parting surface, the direction of the core distance 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 parting.
8. Mold parts are easy to process
When selecting a parting surface, the mold should be divided into parts that are easy to machine, reducing the difficulty of machining.
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 the design of many molds, there is a full circle of R angles at the parting surface. At this time, the classification of R is the best, and the sharp side cannot be seen.