Method of drying refractory coated foam patterns

Method of drying refractory coated foam patterns

A method is disclosed of dehydrating a thin water based ceramic slurry coating on a foam pattern assembly having hidden internal surfaces. The method comprises sequentially subjecting the coated assembly to a first warm air flow at a sufficient temperature and time to dehydrate and remove 60-80% of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MATZ, BRUNO, KEARNEY, DOLORES CAROLINE
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BLASTING
CASTING
DRYING
DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
FOUNDRY MOULDING
HEATING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
WEAPONS
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Beschreibung
Zusammenfassung:A method is disclosed of dehydrating a thin water based ceramic slurry coating on a foam pattern assembly having hidden internal surfaces. The method comprises sequentially subjecting the coated assembly to a first warm air flow at a sufficient temperature and time to dehydrate and remove 60-80% of the water of the coating, and secondly subjecting the dehydrated coating assembly to low level microwave energy to substantially remove the remainder of the water in all of the coating, the dehydrated coating being devoid of bubbles or cracking.