To make products uniform by supplying a necessary amount of concrete to be supplied to a form promptly and correctly by a method in which photoelectric tubes are installed on both sides of a hopper, the actuation of a conveyer is stopped, and the supply of concrete is regulated for regulating the supply of concrete to the second hopper.
Concrete for one batch of stiff-consistency concrete for instant demolding is stored in the first hopper by a mixer, and multi-layer concrete of nonequilibrium density due to a dead weight load supplied into the first hopper is loosened to be of average density during transportation by a conveyer 15 installed in the lower part of the hopper and sent to the second hopper 14. In this process, a necessary amount of concrete for molding l-2 blocks to be received in the hopper 14 is regulated by a photoelectric tube 16-1 installed outside the second hopper 14 to reduce an excess load due to the weight of concrete itself.
WATANABE KAZUO
WATANABE KIYOKO
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