Molds & Tooling
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PVC Flash
Problem Phenomenon
Flash at the parting line of PVC products
Cause Analysis
Insufficient clamping or parting line wear, and too-deep vent slots also leak material; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Calculate clamping force; fit the parting line; recheck vent slot depth; 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
For PVC flash, check clamping and parting line; 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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