A buyer review workspace for classifying ejection findings, requesting repeatable
evidence, and deciding whether the affected surface can be approved.
Buyer-side engineering explainer
Ejector Whitening and Drag Marks: Buyer Review Explainer
Whitening, pin marks, scratches, or drag lines after ejection may be cosmetic, dimensional, or evidence of local stress. Before approval, the buyer should verify location, repeatability, release condition, draft and texture context, part temperature, and relevant functional evidence.
PTA buyer review mode
Static review summary: ejector whitening and drag marks may indicate local release or ejection stress that should be mapped and verified before approval, especially on critical surfaces.
Step 1: What the buyer sees
Map each mark by location and cavity, and record whether it affects a cosmetic, sealing, mating, or loaded surface.
Step 2: Why it matters
A hidden witness mark may be acceptable; whitening, distortion, cracking, or drag on a critical surface may require evidence before approval.
Step 3: Pattern to verify
Possible patterns may involve sticking, draft, texture, local geometry, temperature, ejector support, or release balance. Verify rather than assume one cause.
Step 4: Stress and drag review
Ask whether the mark is only visual or is accompanied by deformation, cracking, dimensional shift, or repeated stress.
Step 5: Repeatability check
Variation by cavity, cycle, or sample may help identify where further tooling and process verification is needed.
Step 6: Evidence to request
Request evidence connecting the observed mark to the tool location, ejection condition, relevant dimensions, and acceptance criteria.
Step 7: Approval decision
Delay approval when marks are recurring, worsening, on critical surfaces, or supported only by a cosmetic rework promise.
This buyer-side explainer shows possible patterns to verify when ejector whitening, pin marks, or drag marks appear. It is not a final engineering diagnosis or proof of a specific root cause. Verify conclusions against the actual part, mold, draft, texture, material, process record, and supplier engineering review.