Processing Machinery
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Matching of LCP Shot Volume and Barrel Capacity
Fenómeno do problema
【Problem Phenomenon】When small products are made on a large machine, the LCP melt stagnates, degrades and yellows; when large products are made on a small machine, plasticization is insufficient
Análise das causas
LCP is sensitive to residence time at high temperature; when the shot volume accounts for too low a proportion of barrel capacity, the melt stagnates too long and degrades; when the proportion is too high, plasticization is insufficient; the capacity matching principle common to high-temperature engineering plastics also applies to LCP
Solução
Control the shot volume within a reasonable proportion range of barrel capacity; for small parts, switch to a small machine or reduce the screw diameter; calculate the residence time to avoid exceeding the material tolerance limit; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Machine matching depends on residence time; LCP high-temperature material has a high risk of stagnation degradation; 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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