Blow Molding
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PVC vs ABS Comparison
Problem Phenomenon
Insufficient toughness after replacing ABS electrical housings with PVC
Cause Analysis
PVC toughness is lower than ABS and its processing window is narrow, making thin-wall housings difficult to mold; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
Choose ABS/PC for electrical housings; use PVC where corrosion resistance and flame retardancy are prioritized; 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
PVC and ABS are divided by toughness and corrosion resistance; 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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