Apparatus and method for controlling a stopper rod of a bottom p

Details Apparatus and method for controlling a stopper rod of a bottom p Apparatus and method for controlling a stopper rod of a bottom p

1992-12-14

1994-05-17

Kastler, Scott

Metallurgical apparatus

Process

Plugging or tapping

266 78, 266236, 222602, B22D 4120

Patent

active

053120906

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).

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