In general, the choice of parting surface in mold processing will affect whether the injection molded parts stay in the moving mold cavity or in the fixed mold cavity, which will not only affect the smooth demoulding of products, but also affect the processability of mold cavity. Whether there will be flash at the parting surface or whether the trace line of the parting surface will affect the size, shape, wall thickness, mold structure, mold exhaust and film mold of injection parts. Therefore, when selecting the parting surface, we should comprehensively consider all influencing factors, conditions and requirements, and reasonably select the parting surface.

模具加工在选择分型面应考虑的因素：

Factors to be considered in selecting parting surface for die processing:

一般情况下，注塑件应滞留在动模型腔中，越便于产品的脱模；

Generally, the injection molded parts should stay in the moving mold cavity, which is more convenient for product demoulding;

应避开障碍体的阻碍，避免运动干涉，方便产品脱模和模具型腔的加工；

The obstacles shall be avoided to avoid movement interference and facilitate product demoulding and mold cavity processing;

应尽量设在不显眼和易去除飞边毛刺及容易加工的位置上；

It shall be set in an inconspicuous position where it is easy to remove flash and burr and easy to process;

应设在无凹陷及圆弧R的切点之外的位置上；

It shall be set outside the tangent point of arc r without depression;

应考虑到浇口位置的设置及其形状；

The setting of gate position and its shape shall be considered;

有利于浇注系统和排气系统的布置；

It is conducive to the layout of gating system and exhaust system;

不影响模具加工的尺寸及其精度；

It does not affect the size and accuracy of die processing;

应考虑塑料的性能及填充条件；

The properties and filling conditions of plastics shall be considered;

应考虑成型的工艺性及效率；

The processability and efficiency of forming shall be considered;

模具的结构简单使用方便稳定。

The die has simple structure, convenient and stable use.

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