Reasons For Failure Of Demoulding And Treatment Methods

- Dec 04, 2018-

When the mold release resistance due to the tightness of the plastic plug is excessively large, the method of suppressing the molding shrinkage by increasing the holding pressure and the mold temperature is also effective.


On the contrary, if the size is increased and embedded in the cavity due to overfilling, the holding pressure and the mold temperature should be lowered to increase the amount of molding shrinkage. When the mold release resistance due to the tightness of the plastic plug is excessively large, the method of suppressing the molding shrinkage by increasing the holding pressure and the mold temperature is also effective.


Increase the draft angle at the periphery of the cavity, the hub, and the ribs. Especially in the case where it has been embedded, the ejector pin should be provided to the portion where the ejector strength is required to be increased by adding an ejector pin or the like.