Ejector Marks solution?

Reason:

The occurrence of ejector marks on injection Molded parts is due to difficulties in deMolding. The basic reason for the difficulty in deMolding is two situations: one is insufficient solidification of the plastic part when the Mold is ejection, and the other is poor Mold design/production

And generated.

Improvement methods:

a) Plastic

Replace materials with high deMolding efficiency additive grades

b) Mold

Check the cooling 

Add cooling pipes

Increase the smoothness of the lower Mold

Increase the inclination of the Mold when exiting

Check/add Mold venting

Optimize the top out system

c) Injection Molding machine conditions

Reduce the holding pressure

Reduce the holding time

Optimize the pressure transfer point

Reduce mold temperature

Optimize the ejection speed

Increase cooling time