Dummy bar head for continuous casting and method of starting a c

Details Dummy bar head for continuous casting and method of starting a c Dummy bar head for continuous casting and method of starting a c

1977-07-28

1979-04-17

Lazarus, Richard B.

Metal founding

Process

Shaping liquid metal against a forming surface

164426, B22D 1108

Patent

active

041495829

ABSTRACT:
A dummy or starter bar for starting a strand in a continuous casting installation having an open-ended mold is provided with a head which is receivable in the mold. The dummy bar head has a peripheral surface which faces the inner surface of the mold. The dummy bar head further has an end face at least part of which is inclined with respect to the peripheral surface. The end face is directed towards the inlet end of the mold. The dummy bar head is provided with a dovetail-like recess which opens to the inclined part of the end face. The recess enables the strand to become coupled to the dummy bar head and is arranged so that coupling occurs in a manner which permits the strand and the dummy bar head to become detached by relative movement thereof in a direction transverse to the longitudinal axis of the strand. The recess is bounded so as to prevent penetration thereof into the peripheral surface of the dummy bar head and this, in conjunction with the inclination provided for the end face of the dummy bar head, enables the dummy bar head to be readily sealed in the mold. A method of starting the strand involves placing bars of chill material in the recess in such a manner that they are inclined with respect to the inner surface of the mold and that the ends thereof are located in the undercut section of the recess. The molten material introduced into the recess solidifies about the chill bars. The latter serve as an anchor within the solidifying mass thus providing an enhanced connection between the dummy bar head and the strand in the first few critical moments of withdrawal of the strand from the mold.

REFERENCES:
patent: 2176990 (1939-10-01), Crampton
patent: 3080625 (1963-03-01), Pearson et al.
patent: 3795270 (1974-03-01), Fiala et al.
patent: 4036280 (1977-07-01), Rohrig

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