Injection Molding
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Problems in LCP Microcellular Foaming Molding Exploration
Problem Phenomenon
【Problem Phenomenon】When trying LCP microcellular foaming for weight reduction, cells are uneven and strength drops sharply
Cause Analysis
LCP's low melt strength can hardly stably wrap bubbles, so cells easily merge, enlarge and collapse; the foaming window is narrow and requires precise temperature control and gas injection amount; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solution
Use supercritical fluid for precise metered gas injection and modify to improve melt strength; start verification with a small foaming ratio; evaluate the balance between strength loss and weight reduction benefit; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
LCP's foaming window is narrow; start with a small ratio and evaluate the strength cost; 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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