Analysis Of The Causes Of Plastic Parts Cracking During Injection Molding !

We often encounter various problems in the process of injection molding, such as: gas eye, layered peeling, weld marks, traces, flashing and other common problems, and the most serious reasons for plastic cracking What?

First, injection molding processing in production, must be produced after a period of time in the gradual increase of the tube temperature, mainly because the melt glue in the injection molding machine tube just because of the heating time, the melt viscosity is low, the fluidity is good, The product is easy to run, and after a period of production, the melt is continuously taken away by the melt glue, resulting in insufficient melt glue, high viscosity and poor fluidity, which makes the product lack glue.

Second, the use of three points into the glue to make the product into the glue evenly, to prevent the product from producing an elliptical shape. Secondly, in the production of metal inserts, the injection molding process requires pre-heat treatment of the inserts to prevent the cracking of the metal inserts when the metal insert products are reproduced.

Third, the injection molding process for the product is easy to brittle phenomenon, with the increase of the proportion of new materials, reduce the number of times the nozzle material recycling used to solve, generally can not exceed three times. There is also the phenomenon that the addition of glass fiber products is prone to panning, and the method of increasing the temperature of the melt glue, the temperature of the mold, and increasing the pressure of the injection glue is solved.