| 摘要 |
The purpose of the present invention is to facilitate the treatment of heartwood which is formed by aligning multiple heartwood blocks where the extension direction of a fiber follows the thickness direction, and to facilitate fixation work on both faces of a metal plate. Multiple heartwood blocks (10) cut from rock wool (1) are arranged in a row while the extension direction of a fiber (1a) follows the thickness direction; a first heartwood block layer (21) is formed by coating an adhesive (25) on the upper surface thereof; a second heartwood block layer (22) is formed by laminating the multiple heartwood blocks (10), while the extension direction of a fiber (1a) follows the thickness direction, on the upper surface of the first heartwood block layer (21) in a zigzag or a pound (#) shape; and heartwood (20) is obtained by pressing the laminated heartwood block layers (21, 22) in the thickness direction. |
