This is often the case during the operation of vertical injection molding machines. For example, at first, the injection mold was full, and when several molds were made, there would be dissatisfaction. Then just hit a few empty molds. If you continue to operate and there is a problem, or if you do well in the morning and after doing it for a while, you find that you are not satisfied, is it possible to reduce some of the stress? Are these problems related to pressure instability?
This problem can basically be judged as follows:
The cause of spillage in the nozzle is occasional. Sometimes the guide is blocked and, the nozzle head is hard, and the glue can’t be shot. This mold, of course, is empty. So why is the lower mold good again? The reason is that the last overflow may have melted due to time issues. If the previous mold is not completed, it is very likely that the next mold has a large amount of material, which can easily cause excessive pressure. At the same time, what you say can sometimes add to the stress. When you increase it, it doesn’t spill and the pressure is too much. Treatment: Increase the loosening, if the loosening is large enough, you have to check whether the junction between the glue and the nozzle is reasonable, generally we have a pad treatment.
Increase the temperature of the nozzle and gum path of the vertical injection molding machine.
Adjust the injection position and pressure, short range and high pressure.
Holding pressure is too large or too long. Injection time is too long, etc.
Consider other pressure and flow instabilities.
