Apparatus for obtaining drain-cast hollow articles for ceramic ware
US4664610A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1985 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Jun 10, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B1/265
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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 wat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.