• 2023-12-04
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• 5 Comments

What should we pay attention to when selecting the parting surface of the mold?

The plastic solidifies in the mold cavity to form a plastic part in order to take it out, the cavity must be opened, that is, the mold must be divided into two parts, that is, the fixed mold and the dynamic mold two parts, the two parts of the contact surface becomes the parting surface.

When selecting the parting surface, pay attention to the following problems:

The largest section of the molded part should be selected in order to smoothly remove the molded part from the cavity.

The surface quality and appearance requirements of the injection parts as well as the accuracy of the size and shape should be ensured.

The parting surface should facilitate exhaust and prevent overflow.

It should facilitate the processing of the mold and simplify its structure.

The selection of parting surface of plastic mold is not only related to the normal forming and demoulding of plastic parts, but also affects the structure and manufacturing cost of the mold. Generally speaking, the overall selection principle of the parting surface is to ensure the quality of the plastic parts, facilitate the demoulding of the parts and simplify the mold structure.

The details include the following:

The parting surface should be located at the part with the largest cross-section size of the plastic part to facilitate demoulding.

Help to ensure the dimensional accuracy of plastic parts.

It is beneficial to ensure the appearance quality of plastic parts. Parting surfaces should be avoided as far as possible on smooth, flat surfaces or circular curved surfaces.

As far as possible to meet the requirements of injection molding products.

In the process of injection molding, process defects such as demoulding slope, flash edge, ejection mark and gate mark are inevitable. When selecting the parting surface, the process defects should be avoided as far as possible to affect the function of the parts.