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READ MOREWhen molding thick-wall polycarbonate (PC) parts, two of the most common—and frustrating—defects often appear together:
Sink marks on the surface
Burn marks or short shots caused by trapped air
Many process technicians instinctively try to solve both by tweaking the same parameter. That’s where things go wrong.
The truth is: sink marks and venting issues stem from different stages of the injection cycle and require separate, targeted adjustments. In this post, I’ll walk through a practical strategy to tackle both without falling into the trap of overcomplicating your process setup.
