Why Do Injection-Molded Parts Warp After They Leave the Mold?

Asked 9 hours ago 28 views

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We’re seeing molded parts come out looking acceptable, then develop a slight bow or twist as they cool. The issue is more noticeable on wider pieces, but it doesn’t happen on every production run.

For people who work with injection-molded parts, what clues help separate uneven cooling from material choice, packing pressure, or mold design? I’m also curious what measurements you record during a run so the next adjustment is based on evidence rather than trial and error.

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