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We’re seeing shallow sink marks on a few thicker sections of an injection-molded part, even though the machine settings and material batch haven’t changed. The defects aren’t appearing on every part, which makes the cause harder to pin down.
Could this point to uneven cooling or packing pressure, or should we be looking more closely at gate location and wall thickness? I’d be interested in which measurements or process checks are most useful before changing several settings at once.
