Transparent PMMA Cover Flow Review
The buyer needed to avoid visible gate marks, weld lines and stress whitening on a clear cosmetic surface.
Buyer situation
Clear-cover CAD, PMMA resin expectation, optical surface notes and a request to avoid visible gate and weld-line defects.
Main risk
The buyer needed to avoid visible gate marks, weld lines and stress whitening on a clear cosmetic surface.
Engineering decision
Gate strategy and flow-risk review were discussed before tooling so cosmetic defects did not become a late T1 discovery.
Sample gate
T1 samples would be reviewed for weld lines, flow marks, stress whitening, gate vestige, scratches and dimensional fit.
Evidence
Flow and gate review narrowed the tooling approach before T1.
Buyer takeaway
Transparent parts need appearance, resin handling and gate decisions aligned early; a normal hidden-part gate logic is usually not enough.
Evidence matrix
| Evidence area | What the buyer should see |
|---|---|
| Starting files | CAD, drawing, sample photos or supplier issue notes that explain why the project needed review. |
| Mold decision | Steel, cavity, gate, parting-line, slider, insert or export handoff assumptions. |
| Sample gate | T1 sample photos, dimensions, appearance notes, assembly fit and issue list. |
| Release proof | Dimensional or FAI record, material confirmation, correction log and acceptance status. |