Patent ID: 6540007
Filing Date: 2003-04-01
Classification: B22D

Abstract:
A process for molding a casting made of light alloy, comprising the following steps:providing a mold having a metal frame housing a print made of physically setting sand, said frame being defined by a pair of metal half-frames each carrying a half-print, said print having therein a feed runner in communication with a mold cavity and opening to the outside through an opening provided in the frame, for feeding a mold cavity with molten alloy and incorporating a movable closure member for closing off said feed runner, arranging said half-frames with their respective half-prints facing upwardly, wherein cores and inserts can be positioned in said half-prints, assembling said half-frames to each other and bringing the resulting mold in a standing position with said feed runner extending in a substantially horizontal direction, conveying said assembled mold to a mold-holder in a first position, rotating said mold holder around a substantially vertical axis so as to bring said mold holder with said mold in a second position where the feed runner of the mold in said molding stand is located in the lower part of the mold and registers with a feeding tube capable of delivering molten metal alloy, sealingly connecting the feed runner to the feeding tube, applying pressurized metal alloy to the feeding tube so as to fill the mold cavity with said alloy, before solidification of the casting, closing said movable closure member, and then turning the mold-holder with said mold through approximately 180Â° around a substantially horizontal axis such that incipient solidification in coldest regions of the mold before mold rotation is avoided, rotating said mold holder around said substantially vertical axis so as to bring said mold holder with said mold in a third position where the mold is conveyed from said mold holder to a cooling station, whereby said mold holder becomes available for a further mold.