Method for casting concrete panels
US4729859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1986 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Sep 29, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B23/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for centrifugally casting a rectangular access floor panel includes the steps of forming a metal pan having a planar bottom, peripheral sidewalls and a plurality of upstanding tabs, inserting the metal pan into a cavity defined by a two-part mold and filling the pan within the mold with a concrete mixture. The mold is rotated about a vertical axis and vibrated to evenly distribute the concrete mixture within the pan. A smooth magnetic sheet is placed within the cavity. The sheet engages the planar bottom of the metal pan and prevents seepage of the concrete mixture through openings in the bottom of the pan during casting. The apparatus includes a turntable, a drive for rotating the turntable and a mold clamped to the turntable. The mold is vibrated during rotation to insure a void-free distribution of the mixture throughout the pan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.