Apparatus and method for controlling a stopper rod of a bottom pouring vessel
US5312090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Dec 14, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D41/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A bottom pour casting apparatus (100) includes a vessel (114) having a bottom nozzle (118). A stopper rod (112) is coupled to a programmable controller (250) by linkage mechanism (250) for controlling the movement of the stopper rod (112) according to a pouring schedule. An LDT position sensor (216) is coupled to the stopper rod (112) by a cable (238) and also electronically to the controller (250) for sensing the actual position of the stopper rod during a pouring cycle and conveying this information directly to the controller (250) thereby bypassing any backlash present in the linkage mechanism (116) to enable precise control of the stopper rod movement. A method includes rezeroing the position sensor (116) at the beginning of each pouring cycle to account for slag build-up on the nozzle (118).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.