Problems of injection mold test

After we finish the mold, we will try the mold, because some defects in the design will cause defects in injection molding. The main defects are several. I will explain them one by one.
Test mold


1, inadequate plastic parts: mainly due to inadequate injection molding machine material position, improper filling flow, or injection machine parameters are not correct, inflatable and exhaust causes are not filled with plastic cavity, plastic parts incomplete or multi cavity cavity filled with several types of cavity filling discontent.


2, the size is unstable: This is mainly due to the poor precision of the mold, the instability of the injection machine and the unstable forming conditions, so that the change of the size of the plastic parts is unstable. It is necessary to modify the mold or adjust the parameters of the injection molding machine.


3. Bubble: due to excessive gas or bad exhaust in the melt, the residual gas in the plastic part is found to be smaller or cluster holes. The surface of the product is not beautiful.


4, Microcosm: due to poor pressure preservation, poor plastic parts cooling, uneven wall thickness and plastic shrinkage, need to adjust the product structure.


5, too large flex: due to poor mold clearance, too large clearance, or plastic flow too good, too much material to make plastic parts edge extrusion extra thin.


6, the weld mark is obvious or too much: because the plastic temperature of the front end is relatively low, the resin phase is difficult to solve, and so on.