Car logo mould

Car logo mouldThe shrinkage force of the injection molding mold is calculated in the form of thermoplastic molding shrinkage. As mentioned above, the factors affecting the molding of thermoplastics ar

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  • 型号: Car logo mould

Car logo mould

Car logo mould


The shrinkage force of the injection molding mold is calculated in the form of thermoplastic molding shrinkage. As mentioned above, the factors affecting the molding of thermoplastics are as follows: Plastic types: plastic injection molding molds during the molding process of thermoplastics, due to the volume change of the crystallization form , The internal stress is strong, and the residual stress in the plastic part is frozen in the molecular orientation factor. Therefore, compared with thermosetting plastics, the shrinkage force is larger, the shrinkage rate is larger, the shrinkage rate range is wider, and the directionality is obvious. In addition, the shrinkage after molding or The shrinkage rate of debugging is generally larger than that of thermosetting plastics.

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Plastic characteristics: When the injection molding mold product is molded, the molten material contacts the mold cavity surface and the outer layer is immediately cooled to form a low-density solidified shell. Due to the poor thermal properties of the plastic, the plastic inner layer is slowly cooled to form a high-density solid with large shrinkage. Layer, so the wall thickness, slow cooling, high-density layer thicker shrinks. Therefore, the characteristics of plastic parts have a greater impact on the directionality of shrinkage.

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If the engineer fails to design the injection mold in the early stage, it will be difficult to modify the mold later, and a lot of manpower and material resources will be wasted, and the customer is not satisfied. The most frequent occurrence is mold dragging, and the position of the glue inlet point is not selected properly, which causes the injection molding to be unable to adjust the gas line, which affects the appearance.


   The most important point when opening injection molds is the choice of parting line. This will directly affect the appearance. Customers pay most attention to appearance defects. The appearance of a product can affect the trend of sales. When designing the parting line, choose a relatively hidden position, so you must first understand the assembly of the product. In the more inconspicuous place, the parting is not a professional person and it is not obvious. As long as the injection mold can be designed and opened according to the above precautions, it is worry-free and labor-saving, and it can be completed in the time required by the customer.