GB1463361A - Apparatus at the delivery end of a continuous casting machine for unscrewing an encast threaded connector - Google Patents

Abstract

1463361 Unscrewing devices; continuous casting SCHLOEMANN-SIEMAG AG 1 Feb 1974 [2 Feb 1973] 04882/74 Headings B3N and B3F In a continuous casting machine there is provided apparatus for unscrewing a connector (7) (Fig. 6, not shown) threadably attached to a dummy bar 6 and encast in the cropped end of a continuous casting, said apparatus comprises a receiver 5 for the dummy bar 6 and an unscrewing device 9 containing an opening 9<SP>1</SP> for receiving the cropped end of the casting, the unscrewing device 9 having a rotatable head 15 containing said opening 9<SP>1</SP> which is driven by a worm drive 17 and chain drive 20. The opening 9<SP>1</SP> engages the sides of the casting cross-section to rotate the cropped end relative to the dummy bar 6, which may be held by restraining means on the receiver 5. The opening 9<SP>1</SP> is open to one side to allow the cropped end to drop out into a scrap container. Recesses 22 in the opening allow the cropped end to cant over in the opening 91 during unscrewing to prevent it dropping out, but when the connector 7 is unscrewed the rotatable head 15 is reversed for a small degree of rotation and a lever 24 engages the cropped end to rotate it within the opening until it drops out. In an alternative embodiment (Figs. 5a-5c, not shown) an outer sleeve having an axial gap can be rotated relative to the rotatable housing to either close the open side of the opening or to be aligned therewith to allow the cropped end to drop out. The continuous casting machine for producing steel billets 3 comprises a cutting station 2, a run-out roller table 1, a cooling bed 4 and the unscrewing apparatus 5, 9. In an alternative layout (Fig. 2, not shown) the unscrewing apparatus is placed between the run-out table 1 and the cooling bed and receives the dummy bar and attached cropped end sideways into the unscrewing device.