Apparatus for obtaining drain-cast hollow articles for ceramic w

Details Apparatus for obtaining drain-cast hollow articles for ceramic w Apparatus for obtaining drain-cast hollow articles for ceramic w

1985-06-10

1987-05-12

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With foraminous or absorbent means for removal of vehicle or...

210247, 425 85, 425437, 425439, B28B 126

Patent

active

046646108

ABSTRACT:
An apparatus for drain-casting a slip comprises a mold including at least two divisible mating mold portions to form a mold cavity, a slip tank, a pump, air compressors, suction pumps, valves and tubings to connect them accordingly, supporting means of the mold portions, and a moving stand to receive the molded article thereon. The mold portion includes an air-tight vessel and a filter member inside the vessel, the filter member contains a water-drainage means, and the drainage means is communicated with the outside of the vessel. One of the mold portions has a slip supply duct and one other mold portion has an overflow duct, which ducts are communicated with the outsides of the vessels. A method using such apparatus to form hollow ceramic or porcelain ware comprises pressurizing a slip introduced into the mold cavity and preferably depressurizing the water-drainage means to deposit the slip onto the filter members, draining an undeposited slip through the slip supply duct, removing one of the mold portions by applying compressed air to the water-drainage means of the mold portion to exude some water between the filter member and the resulting molded article, depressurizing the water-drainage means of the other mold portion to attract the molded article into the mold portion, hanging the molded article attracted into the mold portion, applying compressed air to the water-drainage means as described above, and thus demolding the molded article on the stand safely.

REFERENCES:
patent: 3156751 (1964-11-01), Valdes et al.
patent: 3663681 (1972-05-01), Ehrlich
patent: 3664799 (1972-05-01), Wallick, Jr. et al.
patent: 3812229 (1974-05-01), Anderson
patent: 4059376 (1977-11-01), Ito et al.
patent: 4413966 (1983-11-01), Mills et al.

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