Patent GB-734892-A (GB)
Title: Casting installations
IPC: B22D33/00
Filed: 1953-05-21
Abstract: 734,892. Roller conveyers. BUDERUS'SCHE EISENWERKE. May 21, 1953 [June 9, 1952], No. 14365/53. Class 78 (1). [Also in Group XXII] A casting installation comprises three parallel roller conveyer tracks, the two outer tracks conveying moulding boxes, which rest on loose plates, from the moulding stations to the casting stations and thence to the emptying stations, while the middle track carries the empty boxes back to the moulding stations. The transportation of the boxes on the track, their removal at moulding and emptying stations, and movement of empty supporting plates takes place in a partially automatic manner by means of driving means incorporated in the tracks and associated stop control devices actuated by the parts conveyed and also in accordance with the prevailing working load of the moulding and emptying stations, respectively located at both ends of the roller tracks at both sides of the inner track. The installation is further characterized in that the roller tracks ascend and descend in such manner that storage zones for the. boxes are formed in front of the removal stations for the boxes. The empty boxes 9 on supporting plates 10 are fed by driving means 7 over the ascending first part of the conveyer 2, from which they travel on a decline to the top box moulding machines 3. As soon as an empty box comes opposite a machine 3 it engages a switch 11 to stop the conveyer drive 8 and a switch 12 which causes a lifting appliance 13, Fig. 4, under the control of an operator to lift the top box to one of the moulding machines 3. The lifting appliance during this movement actuates a switch 14 to start the drive 8 and a similar operation occurs when the bottom box reaches the level of the bottom box moulding machines 4. The plates 10 travel on to a roller drive 15 where they are fed to one or other of the conveyers 1. When an empty plate then arrives opposite a moulding machine 4 it actuates a switch 16 to stop the roller drive 15. A moulded bottom box is deposited on the plate and manual operation of switches 18, 18a at the machine 4 and the associated machine 3 starts the conveyer drive 19 and advances by the width of one plate all the supporting plates on the conveyer a switch 20 stopping it when a moulded bottom box arrives at the machine 3 where a moulded top box is placed in position. A switch 21 actuated by the support plate in its travel from the machine 4 has meanwhile re-started the drive 15. The complete moulding boxes are then locked, the metal poured and allowed to cool. Before the emptying stations 6 the filled moulds travel down a short slope automatically to roller drives 22, actuating switches 23, 24, by means of which the empty supporting plates are advanced until one travels down a slope to the driving means 7 for the conveyer 2, and a compressed air piston 30 moves a previously emptied box on to the conveyer 2 and the next full box from the conveyer 1 on to the emptying station. The emptying station comprises a vibratable slide track whose vibration is started and stopped by the engagement of the piston 30 with a switch 31. The casing drops on to a grating 32 and is by vibration thereof and a grating 34 carried to a discharge station, while the sand falls through the grating. Actuation of a switch 36 to start the drive 7 advances the conveyer 2 by the length of one plate, the drive being halted by a switch 37.