Molding Machine Operator how-to

How to Inspect Molded Parts for Defects

Catch defects before shipping.

Updated By the Career Education Institute Curriculum Team
Quick answer

Catch defects before shipping. In short: compare; check; check, then complete the remaining steps below.

Step by step

  1. Compare to a good sample.

  2. Check for short shots.

  3. Check flash.

  4. Check sink marks.

  5. Measure key dimensions.

  6. Report problems.

Safety reminders for molding machine operators

  • Use press guards
  • Wear heat gloves
  • Lock out for mold changes
  • Never stand under lifted molds

Injection molding · Die casting · Short shot · Flash · Sink mark · Cycle time: see the full molding machine operator glossary.

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