How to solve cracking of molded components after painting?
We mold a U shaped component in ABS with a clear PC insert [for indicator lamp]. At the time of molding we don’t see any problem in the component.
But when it comes out of painting shop we see cracks in the ABS part The crack start from the meeting point of PC and ABS and proceed in the ABS. At least 10% of components are rejected this way.
The molding process could be inducing high internal stresses so evaluation of this may help. Typical molding yields should be 96% or better.
Did you think to use EXJECTION for your part? With this process, you can produce your part without stress in the melt and use your PC insert and the painting in on step. This process could certainly help you to solve your problem in potimizing your molded part.
I invite you to have a look on the website of Exjection and contact me by email for more information if you are interested in.
Stress-Make sure you are maintaining your moisture content as this will change your fill characteristics and could result in stress.