Industry information

Specification for parting surface design of plastic molds

2021-05-20

Specification for parting surface design of plastic molds:


1. The design principle of parting surface is to purchase flat parting surface perpendicular to the direction of die opening, second inclined surface, second step surface, curved surface and 3D curved surface parting as far as possible.

2. If the parting surface can not be parallel to the direction of die opening, the inclination Angle should not be less than 3.

3. In the case of parting surface and curved surface, it is conventional to do extension, and can not be extended to do mesh surface, sweep surface connecting, generally do 10~15MM sealant and then do plane connecting stretching.

4. When the parting surface is a curved surface, 30~50MM is taken for the large die, and 20~25MM is taken for the small die as the sealing position. The plane is taken behind the surface to avoid the air and the aspect is processed.

5. When the side of the cavity needs to do the skin grain, the parting surface should not be extended to prevent the crossing of the boundary when the skin grain is done, which causes the parting surface to have burr and is not easy to improve.

6. When opening exhaust groove on parting surface: the sealant position is reserved for 2~3MM, the exhaust groove can be opened, the spacing is controlled within 50~100MM, and the exhaust groove is set on the side of the mother die as far as possible.

7. When the square hole and the round hole need to be broken, it should be left on the side of the mother mold as soon as possible to facilitate the leather grain.

8. When the product faces the plug and seal adhesive, the Angle is only 1, the zero degree positioning block on the die frame can not play a role, and a suitable positioning block needs to be designed near the plug and seal.

9. The mold positioning style should be consistent with the tiger style. If both sides of the mold locking are parallel, the mold will deviate