Auto mold is a product we see every day, which is used in various interior and exterior decorations of automobiles, such as plastic bumpers, shock absorbers, instrument panels, etc. Therefore, we can't let go of any detail when processing, so today I will talk about some points that need to be paid attention to when processing automobile molds.
Automotive injection molds require much higher processing equipment than traditional injection molding. Generally, there are two methods for processing.
The first is to use a mirror spark machine for processing, just to ensure the high precision of the product, it is best to use graphite electrodes for EDM processing, because the loss of graphite electrodes is much smaller than that of ordinary copper electrodes. .
The second is our usual processing method, which is electroforming. The use of electroforming technology can ensure that the mold has good accuracy. The only disadvantage is that the processing time is relatively long, and each cavity must be processed independently. Also, once minor damage occurs during the production process, it cannot be repaired, and the damaged acupuncture points can only be replaced.
In terms of molds, mold temperature is also a very important parameter for auto molds. Auto mold processing faces high-end consumers. Now we generally use the concept of high-gloss injection molding and introduce rapid heating and cooling systems.
Generally speaking, high mold temperature is very helpful to auto parts molds, for example, it can prevent thin-walled filling difficulties and lack of material. However, too high mold temperature will bring new problems, that is, cycle lengthening and shrinkage and deformation after the die sinking.
Then it is very important to introduce a new mold temperature control system at this time. The mold temperature can be increased during the injection molding process, so that the melt can fill the cavity faster, and prevent the melt temperature from falling too fast during the filling process. As a result, the filling is incomplete, and during demolding, the mold temperature can be rapidly reduced, kept at a temperature slightly lower than the thermal deformation temperature of the plastic, and then the mold is opened and ejected.