What Is Injection Molding Part Acceptance Criteria?
Injection molding part acceptance criteria are documented pass/fail rules used to approve molded parts for FAI, lot release, incoming inspection, or final shipment. They define CTQ dimensions, cosmetic defect limits, material verification, functional checks, packaging requirements, and the records needed for traceability and sign-off.
What This Checklist Covers
- CTQ Dimensions: Ballooned dimensions and GD&T requirements.
- Cosmetic Limits: Acceptance boundaries for Class A/B/C surfaces.
- Material Compliance: Resin grade, color match, and regrind limits.
- Functional Interface: Assembly, snap-fit, thread, and sealing checks.
- Traceability: Lot ID, Cavity ID, and labeling protection rules.
- Release Records: Mandatory pack including FAI, reports, and COA.
What This Checklist Does NOT Cover
- It does NOT approve mold design freeze or gate locations.
- It does NOT replace mold run-off or tool handover acceptance.
- It does NOT validate process windows or per-cavity repeatability.
- It does NOT replace PPAP or program-specific validation protocols.