Ten principles of injection molding mold design and typing
Release Time:
Apr 03,2026
Do you understand the ten principles of injection mold design classification?The following is an introduction to these ten principles.
Do you understand the ten principles of injection mold design classification?The following is an introduction to these ten principles.
1. Consideration of clamping force
The lateral clamping force of the mold is relatively small, so for large-scale products with a large projection area, the direction of the large projection area should be placed in the opening and closing direction of the front and rear molds, while the side projection area with a small projection area should be considered as lateral typing.
2. Meet product release requirements
The parting surface is to make the product smoothly removed from the mold.Therefore, it is a basic principle to choose the position of the parting surface on parts with larger cross-section sizes.
3.Parting surface shape
For general products, parting surfaces perpendicular to the opening direction of the injection molding machine are usually used, and parting surfaces of other shapes are only used under special circumstances.The shape of the parting surface is based on the principle of easy processing and easy release.As with curved products, they must be parted according to their curvature when parting.
4. Ensure the appearance and quality of the product
The parting surface should not be selected on the smooth outer surface of the product.The appearance surface does not allow lines that affect the appearance, such as pinching lines; for some products with concentricity requirements, all parts with concentricity requirements should be placed on the same side to ensure their concentricity.
5. Determine the direction
When determining the direction of the product in the mold, the parting surface should be selected to prevent the product from forming side holes or side buckles as much as possible, and to avoid the use of complex mold structures.
6. Good release
Generally, the release mechanism is in the moving mold, so when choosing the parting surface, try to keep the product in the moving mold as much as possible after opening the mold.Therefore, for some places that may stick to the fixed mold, we tend to add an auxiliary release mechanism to the fixed mold.
7. Consider the horizontal opening distance
Generally speaking, the distance between the horizontal mechanical mold opening is relatively small.Therefore, when selecting the parting surface, the direction of opening and closing of the front and rear molds should be selected with a longer core drawing distance, and the short direction should be regarded as horizontal parting.
8. Easy processing of mold parts
When choosing the parting surface, the mold should be divided into easy-to-process parts to reduce the difficulty of processing.
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 exhaust.
10. R parting
For many products that use mold design and parting, the parting surface has a full circle of R angles. At this time, R should be considered for parting, and there should be no sharp edges.
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