Molds & Tooling
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PPO Surface Scratches and Edge Chipping
Problem Phenomenon
PPO products show surface scratches and edge chipping during processing and transfer, the appearance defect rate rises, and customer complaints increase.
Cause Analysis
Insufficient mold cavity surface finish scratches products; mechanical processing and transfer cause impact damage; PPO rigid material edges are prone to chipping under impact; stacking tools are unreasonable.
Solution
①Improve mold cavity surface finish; ②use reasonable tools for protection during processing and transfer; ③design rounded transitions at edges and corners; ④train on stacking norms.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO surface protection runs through the entire chain from molding to delivery; cavity finish is the source; transfer management is often overlooked.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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