Products Appear Insufficient Melt Glue In The Injection Molding?

- Nov 23, 2018-

3. The rubber meson leaks. For example, as the melt rubber stroke increases, the amount of glue injected into the product during injection molding does not increase correspondingly, which may be the glue leakage of the injection molding machine.


Check the glue meson leaking method: keep the product of a certain injection cycle in the cavity, and use manual injection. The injection pressure is changed from small to large. Observing the advancement of the screw can judge the leakage of the rubber meson. When the rubber is manually injected, the screw does not advance, indicating that the rubber meson is well sealed and does not leak. Under a large injection pressure, the screw has a small amount of advancement, which is allowed. At this time, it is not a melt leakage, but a shrinkage of the melt.


In the case of product dissatisfaction, first of all, it is necessary to check whether there is leakage of glue between the barrel of the injection molding machine and the nozzle of the injection molding machine; secondly, check whether the rubber meson at the front end of the screw of the injection molding machine has leaked glue. Only after the exclusion of these two situations can other aspects be judged. The following determination methods are based on the case where the two cases are excluded and will not be repeated.