B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 3/12 (2006.01) B28B 17/00 (2006.01) B28B 19/00 (2006.01) G01N 27/04 (2006.01)
Patent
CA 2326221
A method and a device for producing gypsum boards which can minimize the occurrence of defective products and provide an excellentand efficient continuous productivity, wherein a partial breakageof overlay paper and/or underlay paper caused by foreign matters and the like mixed during a continuous production of gypsum boards can be quickly detected by using a method of measuring an electric current flowing between an upside molding machine and a downside molding machine by taking advantage of the facts that gypsum board base paper is insulating and gypsum slurry held between sheets of the base paper is conductive, and, in addition, foreign maters causing a breakage of the paper can be easily removed without a partial breakage of paper developing into a widthwise cut across the paper and without suspending the production of gypsum boards, thereby enabling a stable continuous production of gypsum boards.
La présente invention concerne un procédé et un dispositif de production de panneaux en gypse pouvant réduire au minimum la présence de produits défectueux, tout en permettant une excellente et efficace productivité continue. Ainsi, on peut détecter rapidement la rupture partielle d'un revêtement papier et/ou d'une sous-couche papier provoquée par le mélange de corps étrangers ou analogues pendant la production continue des panneaux de gypse, en utilisant un procédé de mesure du courant électrique traversant des machines de moulage supérieure et inférieure, tirant avantage du fait que le support des panneaux de gypse est isolant, et que la pâte de gypse maintenue entre les feuilles du papier support est conductrice. Par ailleurs, on peut facilement retirer les corps étrangers provoquant la rupture du papier sans causer de dommage partiel pouvant induire le déchirement du papier dans toute sa largeur, et sans interrompre la production des panneaux de gypse; ceci permettant une production continue stable de panneaux de gypse.
Endo Shouichi
Sasaki Kunitoshi
Shimojima Mikiyoshi
Yonezawa Shinji
Marks & Clerk
Yoshino Gypsum Co. Ltd.
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