Injection Molding
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PPS product multi-stage injection
Problem Phenomenon
Speed curve optimization.
Cause Analysis
PPS fills fast and needs precise curves; prevent jetting and overpacking.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
①Multi-stage injection; ②low speed in the initial stage; ③filling in the middle stage; ④deceleration in the final stage.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
Multi-stage injection is the basis of PPS precision molding.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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