| 摘要 |
<p>A grind stone-type scoring device for a gypsum board production device, c apable of accurately and stably forming a groove with a constant depth in a gypsum board liner paper and in which wear of a rotating blade and receiving base is prevented. The scoring device (11) for the gypsum board production device (10) has the rotating blade (24) and the receiving base (30). The gyp sum board liner paper (3) travels under tension on the receiving base (30), and the receiving base is in contact with the lower side of the gypsum board liner paper. The receiving base has an opening (32) directly under the rota ting blade. The lower side of the gypsum board liner paper is released downw ard at the opening. The gypsum board liner paper is ground by an edge (24a) while being slightly bent downward within the range of the opening (in the r egion of angle .beta.).</p> |
