Processing Machinery
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PVC Transparent Part Gel Particles
Problem Phenomenon
Gel particles and specks appear on transparent PVC products
Cause Analysis
Fish eyes from poor plasticization or foreign impurities, visible in transparent parts; 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
Optimize plasticization temperature and shear; clean raw material; strengthen filtration; 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
Gel particles in transparent parts are controlled by plasticization and cleanliness; 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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