1、 Reasons for difficulty in demoulding
1 groove in the mold
2 insufficient demoulding inclination
3. The mold finish is not high
2、 Associated knowledge
1. The failure caused by insufficient demoulding slope is very common. When designing products, it must be on the drawing
Mark the demoulding slope. The demoulding slope usually ranges between 1~2 degrees. In this range, it is better to make it as large as possible,
For special occasions, it is allowed to be more than 0.5 degree
If the injection pressure is too high and the product is too close to the mold, demoulding becomes difficult
In order to make the product out of the mold smoothly, the release agent containing silicone oil is generally used. However, when the release agent is used, only
It can be applied very thinly. It's hard to wipe off if the spray is too thick. And because of the effect of mold release agent, the
Printing marks and other secondary processing become very bad. Once the mold release agent coated on the mold is attached to the product, you want to wipe it off
It's quite difficult.
1 instant: reduce the injection pressure, shorten the holding time, reduce the mold temperature, reduce the demoulding speed, spray demoulding
2 short term: improve mold cavity finish
3 long term: increase the angle of demoulding and the number of demoulding pins
4、 Due to material differences
It is common for heavy and hard materials, such as GPPS, to be damaged due to the lack of decapitation.
For both sticky and soft materials, such as PE, it is possible to cut off the products in blocks.