Injection Molding
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PC/ABS injection speed profile
Problem Phenomenon
Many defects with a single speed.
Cause Analysis
Requirements differ at each stage; the profile is not optimized.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
①Multi-stage injection profile; ②initial stage prevents jetting; ③middle stage filling; ④final stage prevents overpacking.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Multi-stage injection is the basis of fine molding.; 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 later
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