JPS6462264A - Low-pressure casting machine - Google Patents

Abstract

PURPOSE:To facilitate the exchange of a lower die without giving the fear feel for the drop of a molding by allowing the molding to remain on a lower die side and electing the lower die together with a lower die base at the time of die opening. CONSTITUTION:The ejection pins on an upper die 4 side and the molding are knocked out so as to remain on the lower die 8 as the dies are opened after molding. A clamping cylinder 23 is thereafter actuated to rise a can member 25, by which a clamping member 27 is turned over and the lower die base 11 is released from the member 27. Both lift cylinders 15 are actuated and a roller holder 16 is lifted so that rollers 17 for ejection engage with projecting lines 13. The lower die base 11 is further slightly lifted upward to disengage the positioning members 12a, 12b on the lower die base 11 side and machine frame 1 side from each other. The lower die base 11 is advanced as well by the advance of a holder plate in succession to the lifting of the lower die 8, by which the die base is transferred from the rollers 17 to take-out rollers. The lower die 8 is ejected to the outside of the machine, where the molding is taken out.