Patent GB-379287-A (GB)
Title: Casting apparatus for stereoplates
IPC: B41D3/00
Filed: 1931-04-20
Abstract: 379,287. Stereotype. SCHNELL. PRESSENFABRIK FRANKENTHAL ALBERT ET CIE AKT.-GES., Frankenthall, Pfalz, Germany. April 20, 1931, No. 11729. Convention date, April 19, 1930. [Class 100 (ii).] In a stereotype casting-device, a conveyer for molten metal is interposed between the fixed nozzle of the pump and the mould, and is movable over a guide-plate placed above the mould between the mould-filling position and a position in which excess metal can return to the melting-pot. The mould comprises a core 36 and a back 42. The core is formed with inlets 37, 38 and an outlet 39 for cooling-water, and a partition 40 serving to direct the water along the outer wall. An inlet 47 and outlet 50 for cooling-water are formed in the back. The back is reciprocated to and from casting- position by means of cranks 85 on a shaft 80, and is guided by slides running in tracks 92, 97 on the side frames of the machine. Levers 105, pivoted on each side of the back and on a shaft 73, carry curved sections 107 which support the cast plate when the mould is open and facilitate its removal. When the mould is closed, the inlet is in communication with a passage 22 through a member F, and metal is delivered from the pot B by a pump C through a pipe D and part E. The part E is supported on a shaft 7 having eccentric portions to enable the part E to be adjusted towards and from the member F to produce a tight joint. The shaft 7 is carried in slides 3 adjustable in the side frames of the machine. The member F is also pivoted in the slides 3, and, in addition to the passage 22, is formed with a passage 24, communicating with the passage 22, and enabling any metal contained in the pipe D or part E to be discharged into the pot when the member F is tilted. This metal is discharged through a channel 31 in a plate 20 secured above the mould. The passages 22, 31 may be provided with heating- elements. The front of the member F is detachable to permit access to the interior. The metal is fed into the mould through an aperture in the plate 20, and a plate 27 on the bottom of the member F co-operates with the plate 20 to ensure an efficient separation of the metal in the channel 22 from that in the mould when the member F is tilted, the member F being spring-pressed into contact with the plate 20. The tilting of the member F is effected by levers 69 from arms connected to the shaft 73. The shaft 73 also carries an arm connected to the cock of the water-supply to a member 55 which is connected to the member F and, when the latter is tilted, is superposed on the metal inlet aperture of the mould to effect the cooling of the plate and adjacent parts. The shaft 73 is provided with a toothed segment 72 actuated by a rack 74 reciprocated by a crank on a shaft 78, this shaft being provided with gearing for driving the shaft 80. The rack is normally held in engagement with the segment by an eccentric 150 which can be tripped by a handle 151 to permit the actuation of the shaft 73 by hand. The pump is operated from a shaft 125 carrying a crank 127 connected to a lever 131 loose on a shaft 130 but normally connected to the shaft by a pin on a lever 135 fixed to the shaft, the pin engaging the lever 131. Movement of the shaft 130 effects, through bevel gearing 132, rotation of a spindle 136 carrying a toothed segment in engagement with a rack on the pump plunger. The pump can be manually operated by a lever 138 when the pin on the lever 135 is disengaged from the lever 131. The shaft 125 is driven from a motor through reduction gearing and is arranged to drive the shaft 78, or the mechanism can be handactuated. The connections and arrangement of the various parts are such that the operations occur in proper sequence.