Extrusion & Post
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Bidirectional Influence of PPO Mold Temperature on Defects
Problem Phenomenon
【Problem Phenomenon】PPO mold temperature below 100℃ causes delamination and short shots in thin-walled parts, and above 150℃ causes bubbles, silver streaks and warpage
Cause Analysis
PPO melt viscosity is large and high mold temperature must be used: mold temperature below 100℃ easily causes insufficient filling and delamination in thin-walled parts, and above 150℃ easily causes bubbles, silver streaks and warpage; 100-150℃ is the process window
Solution
Set mold temperature according to the 100-150℃ window, thin-walled parts take the upper limit; fine-tune within the window according to defect type; homogenize temperature differences at various points of the cavity; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO mold temperature 100-150℃ window has pitfalls at both ends; fine-tune according to defect type; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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