| 摘要 |
1288968 Moulding-machines BADISCHE MASCHINENFABRIK GmbH 8 Dec 1969 [18 Dec 1968] 59812/69 Heading B3F To compress the contents of two consecutive mould boxes 9, e.g. a cope and a drag, of a line of such boxes passed through a moulding machine, the boxes 9 are pressed by a table 6 of a compressor unit 5 against two heads of the machine. The boxes 9 have their longitudinal axes transverse to the line. A pattern plate 7 with patterns 8 is raised on the table 6 to receive two boxes 9 below a filling frame 10 and a double sand filler 40 which, as shown, is replaced by the press heads 4 for the compacting action. The heads 4 are cylinders mounted on pistons 24 to yield initially to the table pressure. If the patterns 8 differ in size so that the sand volumes differ, an hydraulic balancing circuit 17, 18 connected to a compensating cylinder 19 permits the heads 4 to attain different heights to achieve equal compaction. There is also a control circuit 27, 28, between the chambers 25, 26 above the pistons 24, with valves 32, 33 to determine the pressures in those chambers so that the degree of compaction in one of the boxes 9 may be different from that in the other. |
