← Defect Guide

Void/Bubble

Internal voids inside the part that may not be visible from the surface.

◆ Common Causes

•Insufficient hold pressure
•Insufficient hold time
•Premature gate freeze
•Injection speed too high
•Inadequate resin drying

◆ Solutions

✓Increase hold pressure
✓Increase hold time
✓Enlarge gate size
✓Reduce injection speed (final stage)
✓Verify resin drying

◆ Resin-Specific Notes

PC

Voids easily form in thick sections.

PA

Moisture-induced bubbles. Drying mandatory.

Transparent

Voids are visible in transparent resins. Strict control required.

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This content is a field-reference summary. Final judgment requires on-site engineer verification.