Patent GB-812870-A (GB)
Title: Improvements in or relating to apparatuses for lowering cast ingots from a mold
IPC: B22D29/06
Filed: 1957-10-30
Abstract: 812,870. Ingot-strippers. CANADIAN COPPER REFINERS Ltd. Oct. 30, 1957 [Dec. 3,1956], No. 33824/57. Class 83 (1). Apparatus for lowering ingots from a mould 11 comprises a vertically movable elevator 45 which may, in its upper position, be connected to the removable mould bottom 12, means for lowering the elevator with the mould bottom connected thereto and a cast ingot 13 supported thereon to a lower position whereat the top of the ingot clears the mould; a tilting structure 28 carrying the elevator and the raising and lowering means therefor, a number of rotatable supporting means 54 arranged on parallel axes and providing a roller support in a single plane, said rotatable supporting means being carried by said tilting structure with said axes and said plane vertical when the tilting structure is in a vertical position with the elevator carried thereby arranged for vertical movement, the tilting structure being mounted for tilting movement about a horizontal axis 26 which is at an acute angle to said plane, between a vertical receiving position in which said plane is vertical and said elevator is vertically movable, and a discharge, about 90 degrees away from said receiving position, in which discharge position said plane will be disposed at an acute angle to the horizontal, so that a cast ingot supported on said rotatable supporting means when said tilting structure is at its discharge position will roll by gravity off said rotatable supporting means, and means 64 for preventing said rolling- off until the tilting structure has been moved substantially to its discharge position. The tilting structure 28 is tilted about the shaft 26 by a piston 32, and comprises guides 36 in which is slidably mounted a crosshead including channels 38 connected by a cross-member 39 which is attached to the piston rod 40 of a cylinder 41 secured to the tilting-structure 28. The elevator 45 is movable in the guide channels 38 and is connected to chains 43 passing over pulleys 42 on the crosshead, and whose other ends are connected to a member 44 rigidly secured to the guide means 36. Thus, considering the position shown in Fig. 3, movement of the piston rod 40 downwardly will move the crosshead 38-39 downwardly and permit downward movement of the elevator 45 by gravity, the extent of the vertical movement of the elevator being twice the extent of the vertical movement of the crosshead. During the tilting movement of the structure 28, after a mould bottom with an ingot resting thereon has been clamped to the elevator 45 by a pin passing through aligned lugs on the elevator and the mould bottom, and the elevator has been lowered to its lowermost position, the ingot engages the arcuate member 64, which prevents it from falling from the elevator until the discharge position of the tilting structure has been reached. The apparatus is supported in a water-tank 21, and the ingot discharges from the rollers 54 in the discharge position, Fig. 2, on to a conveyer 67. The mould bottom 12 is clamped to the mould body during casting by bails 18, Fig. 3, which, when released, may be supported on hooks 20 connected to the mould body.