PURPOSE: To provide the line, in which molten metal can be exactly poured into the prescribed number of sprue to be poured in spite of variance of the sprue position.
CONSTITUTION: An intermittent conveying device 3 intermittently conveys the flaskless sand mold line 200. TV cameras 4a, 4b (image pickup means) take image of boundary zone 300 between the adjoining sand molds at the prescribed number in the conveying sand mold line 200, and an arithmetic part 5 (boundary line decision means, sand mold width decision means and molten metal pouring position decision means) decides the boundary line at between the adjoining sand molds 100 by treating the image signal and decides the sand mold width in conveying direction from the width in conveying direction of the boundary line to two adjoining molds in the conveying direction and decides the present position in the conveying direction of the sprue 400 at the prescribed number from upstream end in the sand mold line as the molten metal pouring position based on the decided each sand mold width and these decided informations are outputted to a molten metal pouring machine, and the molten metal pouring machine executes the pouring of molten metal after shifting a pouring cylinder just above the sprue in the molten metal pouring position.
TOMITA HIDEKAZU
NAKAGAWA KOICHI
