| 摘要 |
PURPOSE:To secure uniformity of thickness of respective layers by driving a body belt and side belts periodically and feeding fiber containing dense gypsum, multi-cellular gypsum and slurry composition of fiber containing dense gypsum successively onto the body belt and laminating thereon. CONSTITUTION:A body belt 1 and side belts 2A and 2B are driven in the same speed, and fiber containing dense gypsum slurry A is fed from a feeding device 4 and smoothened by a forming spatula 7A, and then multi-cellular gypsum slurry B containing fiber or not containing fiber is fed from a feeding device 5 and smoothened by a forming spatula 7B, and lastly slurry A is fed from a feeding device 6, smoothened by a forming spatula 7C and formed. During said process, fiber containing dense gypsum layer 10a and a multi-cellular gypsum layer 10b of a surface layer are hardened to manufacture a light gypsum hardened body 10. Said light gypsum hardened body 10 is composed of the multi-cellular gypsum layer 10b and the dense gypsum layer 10a of total thickness of 10-50% of the thickness of whole layer sandwiching said layer 10b, and slurry A forming the dense gypsum layer 10a is prepared to contain 0.05-5wt.% fiber to semi-fluid gypsum. |
