Processing Machinery
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PA12 Product Short Shot
Problem Phenomenon
Incomplete filling.
Cause Analysis
PA12 has a relatively low melting point and good flowability but thin walls still need sufficient energy; insufficient temperature and pressure.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solution
①Increase injection pressure and speed; ②appropriately increase temperature; ③enlarge runner and gate; ④improve venting.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Troubleshoot short shot from pressure, temperature and runner.; 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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