Category Archives: Plastic


Jun24
Case study for the mold-in insert screw boss broken

In a previous discussion, WorkingBear identified potential root causes for screw boss cracking after mold-in screw nut insertion. Following a complaint from the field, we asked EMS and the plastic injection supplier to double-check their inventory and found that approximately … Continue reading

May01
Why Do Screw Bosses Crack After Mold-In Screw Inserts? Common Causes and Solutions

This story is long-standing memory, but WorkingBear is documenting it here for reference and as a learning record. One day, we received a customer complaint regarding a product with a plastic housing that had cracked. The issue was visually striking, … Continue reading