GB1419313A - Match plate moulding machine for producing and assembling cope and drag mould parts - Google Patents

Abstract

1419313 Foundry moulding machines; flasks PETTIBONE CORP 25 Jan 1973 [10 March 1972] 3877/73 Heading B3F A foundry moulding machine for the manufacture of "flaskless" sand moulds comprising cope and drag parts has a framework defining a working station WS and a stripping station S5. At the working station WS is mounted a matchplate 22 on a support 150. A flask carrier 16 supports a cope flask 18 spaced above the matchplate 22 and a drag flask 20 spaced below the matchplate 22. In operation, a ram 34 raises a base member 262 (Fig. 17) to lift the drag and cope flasks 18, 20 and the matchplate 22 from their respective supports against a press/filling head 35 so as to define moulding chambers upon each side of the matchplate. Sand is blown into the so-defined chambers through ports 350, 352. A sprue pattern 354 is mounted on a plate 280 on the head 35. The sand mould parts are then compressed by forcing a base plate 252 up into the drag mould cavity and by releasing fluid from flask retainers 288 to allow the head plate 280 to enter the cope mould cavity. To draw the matchplate 22, the base plate 252 and the base member 262 are lowered leaving the cope flask 18 and drag flask 20 with their respective mould parts cm, dm on the rotating support 16. The support is rotated through 90 degrees by means of a Geneva mechanism (not shown) to a coreplacing station (CS, not shown) where a core 360 (Fig. 28) is inserted in the drag mould part dm by hand. A further 90 degrees rotation of the carrier 16 bring both flasks 16, 18 into the stripping station SS. A base-board 24 is supplied laterally to a lifting table 308 by an automatic dispensing device (Fig. 33, not shown) and the table 308 is raised to compress the cope and drag moulds cm and dm against a reaction plate 26 to mate them, after which, the flask parts 18, 20 are stripped from the completed mould by auxiliary pistons 316. The table 308 is lowered returning the flask parts 18, 20 to the rotary carrier 16 and the completed mould is pushed out of the machine sideways when clear of the flask parts 18, 20. Guiding flasks.-The cope flasks 18 are provided with bushes (Fig. 8) for engagement with locating dowels 202 (Fig. 2) on the cope flask supports 80, and sprung pins 98 for engagement with the matchplate 22 and to facilitate stripping of the flasks 18 and their contained cope-moulds cm from the matchplate 22. In addition, the cope flasks 18, have bushes 104, 105 for receiving locating pins 118 mounted on the drag flasks 20 for cope/drag registration. Pins 158 on the match plate 22 engage with bushes 126 on the drag flasks 20 for location thereto. The matchplate 22 also has bushes 148 for engagement with dowels 150 on its support 152 (Fig. 2). The bushes 126 on the drag flasks 20 also locate the drag flasks 20 with respect to their carriers by means of dowels 202<SP>1</SP>. Sand is preferably blown into the flasks which are vented. The drag flasks 20 have sand inlets 108 in the lower side parts.