Injection Molding
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Improper SMMA Injection Pressure
Problem Phenomenon
SMMA injection pressure insufficient causing poor filling or too high causing flash and internal stress, grasping the medium-high pressure range.
Cause Analysis
SMMA injection pressure recommended medium to high; insufficient pressure causes incomplete filling; too high causes flash and stress; thick-wall parts have high demand; mold strength matching.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
①Injection pressure in medium-high range; ②increase for thick-wall parts; ③flash monitoring; ④mold strength calculation; ⑤optimize and fix.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The medium-high range of SMMA pressure is the balance; thick-wall parts are high-pressure scenarios; calculation keeps equipment safe.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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