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The injection molding process is a complex process that involves mold design, mold manufacturing, raw material characteristics and raw material pretreatment methods, molding process, injection molding machine operation and other factors, and is closely related to processing environmental conditions, product cooling time, and post-processing technology. Process. Therefore, the quality of plastic products not only depends on the injection precision and measurement accuracy of the injection molding machine, but also is affected and restricted by other factors.
Common problems and solutions in the production of PET bottles by injection molding machines：
1. PET bottleneck is skewed
The oil passage is blocked, dredge the mold body oil passage
Exhaust hole of the stretch rod is blocked. Clear the blowing hole of the stretch rod
The nozzle seal is damaged. Replace the nozzle seal.
2. The center point of the PET bottle is off
Pre-blowing pressure is too high, reduce pre-blowing pressure
The pre-blowing flow is too large, reduce the pre-blowing flow
Pre-blowing position is too early, postpone pre-blowing position
Stretch rod bent Replace stretch rod
The gap between the stretch rod and the bottom mold is too large Adjust the gap between the stretch rod
The preform temperature is too high, reduce the preform setting temperature
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