Molds & Tooling
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Filling Difficulty of PEEK Thin-Wall Parts
Problembeschreibung
PEEK thin-wall connectors (wall thickness at the 0.2mm level) are incompletely filled, weld lines are obvious, and flash and trapped air appear during high-speed filling — the process window is extremely narrow.
Ursachenanalyse
Thin-wall flow paths dissipate heat extremely fast, and the high-viscosity PEEK melt faces freezing within a millimeter-level flow length; the increase of filling speed and pressure is in turn limited by mold venting and clamping force, with multiple parameters coupling and constraining each other.
Lösung
①Use a high-speed, high-pressure '2079851475616104452 machine together with a mold temperature controller to raise the mold temperature to the upper limit; ②Use multi-point gates to shorten the flow length; ③Use Moldflow simulation to optimize the filling profile; ④Use high-speed cameras to assist in locating the freezing point.
Wichtigste Erkenntnis
PEEK thin-wall molding is a system engineering of the three elements of material, equipment, and mold; simulation analysis and high-speed photography are key means to shorten the mold trial cycle; 0.2mm-level thin walls require a dedicated process package.
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