Shenzhen plastic mold manufacturer, causes of dents in injection molded products
The causes of dents in plastic injection molded products are multifaceted.
1,In terms of equipment,
Insufficient material supply can lead to insufficient melt, resulting in insufficient mold filling pressure and the generation of dents. Severe wear of screws or plungers can also lead to molten material leakage, further exacerbating the generation of dents. In addition, the size of the nozzle hole can also affect the flow of the molten material, and being too small or too large can cause problems.
2,In terms of plastic injection molds,
A gate that is too small or a runner that is too narrow or shallow can cause the melt to cool prematurely and also easily produce dents. The size of the gate should be moderate, neither too large nor too small, and the position of the gate should also be designed in the thick wall area of the product. In addition, the cold material well in the flow channel also needs sufficient capacity to ensure continuous mold filling. For multi gate molds, it is necessary to adjust the filling speed of each gate to maintain symmetrical gate opening.
3. The design of the product can also affect the generation of dents.
The wall thickness should be designed uniformly to avoid excessive thickness changes. For plastic injection molded products with significant shrinkage, it is possible to consider using ribs instead of thickened parts to avoid the generation of dents.
4. In terms of raw materials,
Raw materials that are too soft can easily cause dents. Nucleating agents can be added to plastic injection molded products to accelerate crystallization and reduce the generation of dents.
The generation of dents in plastic injection molded products is a complex problem that requires comprehensive consideration and adjustment in multiple aspects such as equipment, mold, product design, and raw materials in order to effectively reduce the generation of dents and improve the quality of plastic products.