Molds & Tooling
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PCABS Gate Mark Whitening
Problem Phenomenon
[Problem Phenomenon] PC/ABS gate cut area whitens, and the appearance surface is damaged
Cause Analysis
Shear stress is concentrated in the gate area; the cut section whitens under stress; improper gate position enlarges the mark; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Open the gate on a non-appearance surface; trim with a sharp tool; submarine gates cut automatically; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
PC/ABS gate marks rely on position plus sharp trimming; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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