Injection Molding
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Improper injection speed adjustment producing surface defects
Problembeschreibung
Excessive injection speed produces jetting and elastic turbulence, and too low speed causes underfilling
Ursachenanalyse
PEI melt is relatively sensitive to shear rate; unreasonable injection speed curves cause flow instability
Lösung
Use a multi-stage injection speed control curve (slow→fast→slow); optimize the speed segmentation settings according to product geometry; combine mold flow analysis to guide speed curve design
Wichtigste Erkenntnis
Precise injection speed control is the key to obtaining high-quality PEI products
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