What is delamination and how to eliminate it?

Delamination is a separation of the layers within a molded part. It can also appear as fish-scaling. There are several reasons that cause the problem. Normally it happens that the molten doesn't fuse properly before solidification. The material enters the cavity in layers. If the injection speed is too slow or the temperature is too low, the layers will solidify before they are packed and fused. Sometimes it is because the material is contaminated or with too much moisture.

To eliminate delamination, increase the injection speed, barrel temperature and maintain enough injection hold time. Dry the material according to the specification and select material from reliable suppliers.