Abnormal Problems from Plastic Injection Molding-Crack

 During the plastic plastic injection molding process, some abnormal problems will easily happen, such as cracks, corrugations on the surface,decreasing of brittleness, difficult demolding, unstabledimensions,peeling&layered, welding line, Insufficient injection, etc..These problems will affect the specific use of the mold, so we need to find the relevant factors and solutions.

Crack:

1.Mold is too cold.----adjust the mold temperature.
2.Cooling time is too long.---- reducing cooling time.

3.Plastic and metal inserts shrink differently.----preheat the metal inserts.

4.The ejector device is unbalanced in inclination, the ejection cross-sectional area is small or improperly distributed.----adjust the ejector device or retionalise the quantity of ejector pins and their positions. 

5.The production of the slope is not enough, and difficult the demoulding.----correctly design the draft angle.

Next time we will talk about corrugations on the surface.