Recent when we deal with plastic injection machine old equipments which are used over several years, we summarize some problems often appearing when daily maintenance is not approved.

1. The driven wheel is soiled with glue because there is no equipment maintenance for long time or without careful maintenance, The glue curing on the surface will affect the stationarity of conveying speed of profiles when injecting. During dispensing process, there will appear a phenomenon that a piece of glue will be filled overflow.

2. There will be small pitting on the surface of glue when producing, after troubleshooting of glue damp, filter clogging and valve sealing problems etc. we should consider replacing the plastic injection machine feeding tube and returning tube. This is because after a certain time for using device, there will be a lot of Impurities deposited in the pipe, by cleaning up the tubing, or replacing the tubing, we can eliminate this phenomenon. This phenomenon will be common to old equipment.

3. when it is injecting to tenth or to 20th profiles, you will find some or certain palce appear the phenomenon of glue foaming. This is because frequently turn on the switch when the equipment working, when more than a certain times of using, the tightness of valves will drop, which can be sovled by changing the valves.