Plastic mold in the mold cavity to form plastic parts in order to remove it must open the cavity, that is, the mold must be divided into two parts that is fixed mold and dynamic mold two parts, the two parts of the contact surface to become parting surface.
Parting surface selection should pay attention to the problem is as follows:
Should be selected at the injection molding parts outline the size of the largest cross-section of the injection molded parts smoothly removed from the cavity.
The surface quality and appearance of the injection molded parts should be guaranteed as well as the accuracy of the size and shape.
Parting surface should be conducive to exhaust but also to prevent overflow.
Mold should be easy to process and simplify its structure.
The selection of plastic mold parting surface is not only related to the normal molding of plastic parts and stripping, but also affect the mold structure and manufacturing costs.In general, the general principle of parting surface is to ensure the quality of plastic parts, Die, to simplify the mold structure.
Specifically include the following:
Parting surface should be located in the plastic parts of the largest cross-sectional area for easy demolding.
Help to ensure the dimensional accuracy of plastic parts.
Help to ensure the appearance of plastic parts quality in the smooth surface or arc surface should avoid the selection of parting surface.
As far as possible to meet the requirements of injection molding products.
Injection molding process, mold release, flash, ejecting marks and gate marks and other process defects is inevitable.Selecting the parting surface, should try to avoid the process of defects on the use of the function of the impact.