GB1347698A - Foundry moulding machine - Google Patents

Abstract

1347698 Foundry moulding machines BADISCHE MASCHINENFABRIK GmbH 9 July 1971 [22 July 1970] 32426/71 Heading B3F A press foundry moulding machine includes a machine frame 1, 2 having vertically slidably mounted thereon a rigid frame comprising an upper 17 and lower 22 yokes joined by tie-bars 20. The lower yoke 22 includes a moulding table 27 and the upper yoke 17 a double-acting fluid motor for lifting the rigid frame in sliding bearings 21. The double-acting fluid motor is linked to a cross-bar 2 of the machine frame 1 by a pin 19. In operation, a pattern plate 12 is run into the machine on a conveyer 6, a flask 8 on a conveyer 7 and a sand-bin (11) on a converyer 9. Fluid is supplied to pipe 38 and acts upon a priming piston 34 (having a rod 35 bearing on a pressing piston 36) to raise the rigid frame the length of a priming piston-rod 35. At this primed position the pattern 12 is within the flask 8 and the flask 8 is spaced from the sandbin (11) by a filling (upset) frame 13. The sand-bin (11) is discharged to fill the flask 8 and run out of the machine on conveyer 9. A press head 10 is run into the machine on the same conveyer 9. Fluid is supplied to pipe 39 actuating a pressing piston 36 which further raises the rigid frame to compress the sand in the flask 8. Pressing is stopped by supplying fluid to pipe 39 which lowers the rigid frame to its primed position. Further lowering is by discharging fluid from above the priming piston 35 by means of pipe 38 through a throttle 47, to effect stripping of the formed mould from the pattern 12. Jolting.-In a further embodiment (not shown) the moulding table 27 is provided with a fluid-operated jolting device of the sprung anvil type. Jolting takes place with the rigid frame in the primed position and rocking clamps are provided on the machine frame 1 to prevent moulding table horizontal and vertical movement whilst jolting.