The reason and remedy method of the defect of plastic mould injection part

The reason and remedy of the defects of plastic injection parts, plastic injection parts are often filled in the production process, this kind of defects will affect the quality and performance of products. The main reasons for the incomplete filling of injection parts include the incomplete injection process, the mold cavity is not filled with plastic or some details of the injection process are missing. In order to solve this problem, we need to analyze its causes and take appropriate remedial measures.

The possible causes include insufficient injection speed, shortage of plastics, no screw cushion left at the end of the trip, changes in operating time, too low temperature in the injection cylinder, insufficient injection pressure and other factors. For these reasons, we can take a series of remedial measures, such as increasing the injection speed, check the plastic in the hopper, increase the melt temperature, increase the back pressure, check whether there is a foreign body nozzle.

It is characterized by the weight of the injection molding process changes in size beyond the mold, injection molding machine, plastic combination of production capacity. The possible causes of the problems include the uneven plastic in the injection cylinder, the temperature fluctuation range of the injection cylinder is too large, the capacity of the injection molding machine is too small, and the injection pressure is not stable. To solve this problem, we can take a series of remedial measures, such as check the cooling water flow through the hopper throat situation, check the thermocouple is poor or loose, adjust the screw speed to get the correct screw surface speed.

This defect is usually associated with surface marks, which are formed when the plastic contracts and disengages from the surface of the mold. Possible causes include too high or too low melting temperature, insufficient plastic in the mold cavity, and overheating of the surface in contact with the plastic during the cooling phase. In order to solve this problem, we can adjust the injection cylinder temperature, increase the amount of injection molding, reduce the mold surface temperature, according to the actual needs to appropriately expand the runner section size.
Aiming at the defects of injection molding parts, we need to deeply analyze the causes and take corresponding remedial measures to ensure the improvement of product quality and production efficiency. By constantly summing up experience and improving process, we can better deal with all kinds of injection molding parts defects, improve production efficiency and product quality.