To change the color of patterns at any time and composite them by generating unspecified patterns on the surface and broken-out section of a concrete block to be mass-produced through an instantaneous releasing method of concrete of stiff consistency.
The interior part of a hopper 5 being reciprocated from the lower part of a stationed concrete hopper 1 to the upper part of a molding frame 6 for conveying concrete for one time is partitioned to be a concrete chamber and pattern material camber M. Concrete is placed down from placing ports at both lower surface sides of the hopper 1 to the moving hopper 5, and pattern material M is placed down from one or both pattern material hoppers 2, 3 as shown in the figure via the belt conveyer 4. When it is conveyed on the mold frame 6 and placed down at a stroke, concrete and color material come to be mixed and cured. The releasing block is broken at its intermediate layer, so that unspecified patterns appear on the broken-out section.
IWAMA EIJI
KUWANA MASAMI
| JPH0262203A | 1990-03-02 | |||
| JPS6237104A | 1987-02-18 | |||
| JP4049127B |