Method for obtaining drain-cast hollow articles
US4882111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B1/266
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for drain-casting a slip to obtain a substantially hollow molded article 42 is provided, by the use of an apparatus including a divisible mold 21 including an upper mold portion 22, a lower mold portion 23, and at least two side mold portions 24, 25 to form a mold cavity 38, each mold portion containing a filter member and a water-drainage means, and the lower portion having a slip supply duct 40. The method includes pressurizing a slip introduced into the mold cavity 38 to deposit the slip onto the filter members, draining an undeposited slip through the slip supply duct 40, removing the upper and lower mold portions 22, 23 by applying compressed air to the water-drainage means 34, 35 of the mold portions to exude some water between the filter members 30, 31 and the resulting molded article 42, holding and supporting the molded article 42 between the side mold portions 24, 25, applying compressed air to the water-drainage means 36, 37 as described above, and thus demolding the molded article 42 on the stand 43 safely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.