How to improve two parts to assemble perfectly

[Ericchen]

Hello All;

I am a new guy in a large injection department ,these days we have a new project, there are only two parts (like handle ,Material is PC), We have made the mold (two molds)already ,The first trial sample is not good ,one of these part is too thick (about 6mm),which makes it deformed,So they can not assemble perfectly .we add some rids inside ,but no different ! how to solve this problem?

[rickbatey]

You have to be sure of the root cause of the deformation. It could be from sticking in mold or in new ribs, too short cooling time, too hot or cold mold temp, over packed, under packed, wet resin, and so on.
All of these will require different methods to solve long term.
Rick.

[Ericchen]

Thank you for you reply ,Rick
we have found out what the problem is . There are so many reasons can lead to deformation just as you said (sticking in mold or in new ribs, too short cooling time, too hot or cold mold temp, over packed, under packed, wet resin, and so on),but the critial reason is one of these part is too thick (about 6mm) and there are no rids inside .How could it be! We added rids and adjusted parameter of the injection machine then we can install two parts easily!
Eric