Method and apparatus for manufacturing articles of hydraulic substances
US4337020A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 31, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Jan 31, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B7/241
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plurality of moulds each including a side frame and a hollow bed overlying the side frame are vertically stacked with sealing members interposed between the beds and the side frames for hermetically sealing the moulds. While the pressure in the moulds is being reduced a hydraulic substance such as cement is poured into the moulds. The poured hydraulic substance is heat cured to produce solid articles releasable from the moulds. An empty mould is added to one side of the stack while a mould containing the cured substance is removed from the other side of the stack. Alternatively, the process can be carried out according to a batch system. The moulds may be packed with aggregate, fittings or means for interconnecting the articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.