Injection Molding
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Process Parameter Transfer Failure of PEEK
Problem Phenomenon
After a mature PEEK process is transferred from one '2079851475616104452 machine to another, defects occur frequently, identical set parameters produce vastly different quality, and the setup cycle is greatly extended.
Cause Analysis
Different equipment differs in screw geometry, temperature control characteristics, and pressure transmission efficiency — nominal parameters are the same while the actual melt state differs; PEEK's narrow window amplifies the influence of inter-equipment differences.
Solution
①Re-calibrate based on the actually measured melt temperature and actual filling state; ②Record the original machine's cavity pressure curve as the transfer target; ③Re-verify key parameters on the new equipment instead of directly copying; ④Retain the first-article verification process.
Key Takeaway
The essence of PEEK process transfer is equivalent reproduction of the melt state, not copying parameters; the cavity pressure curve is the best reference for cross-equipment transfer; every piece of equipment needs independent verification.
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