Injection Molding
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PARA Incomplete Filling
Problem Phenomenon
Thin walls and ends of PARA products are underfilled; multiple links of shot size, pressure, speed, runner, temperature and venting may fail.
Cause Analysis
Insufficient shot size; insufficient injection pressure and speed; too-small runner size; too-low material temperature with insufficient flowability; poor venting with air back pressure; 0.5mm thin-wall applications demand process limits.
Solution
①Increase shot size; ②Increase injection pressure and speed; ③Enlarge runner size; ④Increase material temperature; ⑤Add venting.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PARA filling problems must be verified item by item along the systematic troubleshooting path; 0.5mm thin wall is the application boundary of the material's high flowability; when multiple factors superimpose, prioritize temperature and speed.
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