Material Drying 3 Aufrufe

MP compression molded product bubbles

Problembeschreibung

MP melamine tableware compression molded products have surface bubbles 0.5-2mm

Ursachenanalyse

preform powder contains moisture >0.5%; insufficient venting, air and volatiles in the mold cavity cannot escape

Lösung

1) dry preform powder at 80°C for 2h to moisture <0.1%; 2) add vent grooves to the mold; 3) pre-press degassing 1-2 times to release volatiles

Wichtigste Erkenntnis

MP compression molding bubbles are caused by moisture and poor venting; drying and venting are key

MP compression molding bubble preform powder drying vent groove pre-press degassing

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