Method and device for manufacturing a paper or board web where the finishing device can be bypassed

Abstract

A paper or board web is manufactured in an on-line manufacturing process, in which the web is passed from a paper or board machine ( 15 ) directly to a finishing device/finishing devices ( 60, 50, 10 ). The state of the finishing device/finishing devices ( 60, 50, 10 ) is monitored and, during a shutdown of a finishing device ( 60; 50; 10 ), said finishing device is bypassed, the web coming from the paper or board machine ( 15 ) is wound into machine reels and/or treated by means of some finishing device/finishing devices and wound into machine reels. A paper or board machine forms an on-line manufacturing process together with a finishing device/finishing devices.

1 . A method of manufacturing a paper or board web, in which method the web (W) is manufactured in an on-line manufacturing process, in which the web (W) is passed from a paper or board machine ( 15 ) directly to a finishing device/finishing devices ( 60 ,  50 ,  10 ) and the web (W) is wound into machine reels (R 1 , R N ), characterized in that, in the method, the state of the finishing device/finishing devices ( 60 ,  50 ,  10 ) is monitored and that, during a shutdown of a finishing device ( 60 ;  50 ;  10 ) due to a disturbance situation or roll replacement, said finishing device is bypassed, the web (W) coming from the paper or board machine ( 15 ) is wound into machine reels (R 1 , R N ) or treated by means of some other finishing device/finishing devices and wound into machine reels (R 1 , R N ).  
     
     
         2 . A method according to  claim 1 , characterized in that, in the method, the state of the paper or board machine ( 15 ) is monitored and a machine reel/machine reels (R 1 , R N ) wound during a shutdown of a finishing device/finishing devices ( 60 ,  50 ,  10 ) is/are finished later during a shutdown of the paper or board machine not caused by a finishing device.  
     
     
         3 . A method according to  claim 1 , characterized in that machine reels (R 1 , R N ) wound during a shutdown of a finishing device/finishing devices are finished with another/other equivalent on-line or off-line finishing device/finishing devices.  
     
     
         4 . A method according to any one of  claims 1  to  3 , characterized in that, in the method, an unfinished web is unwound from a machine reel during a shutdown of the paper or board machine not caused by a finishing device and finished at a speed different from the normal running speed of the machine.  
     
     
         5 . A method according to  claim 1 , characterized in that, in the method, the quality of the web being manufactured is also monitored and, when a web of undesirable quality is detected, the web is wound into machine reels in order to be transferred into pulp towers for processing.  
     
     
         6 . A method according to any one of  claims 1  to  5 , characterized in that, in the method, the web (W) is wound into machine reels (R 1 , R N ) by means of a reel-up placed in connection with a finishing device ( 60 ;  50 ;  10 ).  
     
     
         7 . A method according to  claim 1  to  6 , characterized in that, in the method, the web (W) is wound into machine reels (R 1 , R N ) by means of a reel-up ( 30 ) placed after a finishing device/finishing devices ( 60 ,  50 ,  10 ).  
     
     
         8 . A method according to any one of  claims 1  to  7 , characterized in that, in the method, the web (W) is both wound and unwound by means of the same reel-up.  
     
     
         9 . A paper or board machine comprising an on-line finishing device/finishing devices ( 60 ,  50 ,  10 ) and means for winding a web (W) into machine reels (R 1 , R N ), characterized in that the paper or board machine ( 15 ) comprises means ( 61 ,  51 ,  11 ) for monitoring the state of the paper or board machine and the finishing device/finishing devices, as well as means ( 42 ,  43 ) for directing the web (W) produced on the paper or board machine ( 15 ) during a shutdown of a finishing device due to a disturbance situation or roll replacement to a reel-up ( 30 ) in order to be wound into machine reels (R 1 , R N ).  
     
     
         10 . A paper or board machine according to  claim 9 , characterized in that the apparatus includes means for unwinding the wound machine reel (R 1 , R N ) and means ( 13 ,  33 ,  43 A,  43 B) for passing the web (W) so as to be finished during a shutdown of the paper or board machine not caused by a finishing device.  
     
     
         11 . A paper or board machine according to  claim 9 , characterized in that the reel-up is arranged in connection with a finishing device.  
     
     
         12 . A paper or board machine according to  claim 9 , characterized in that the reel-up ( 30 ) is placed after a finishing device/finishing devices.  
     
     
         13 . A paper or board machine according to  claim 9  or  10 , characterized in that a reel-up/reel-ups ( 30 ) and an unwind station/unwind stations ( 70 ,  70 ′,  70 ″) are placed in connection with the finishing devices ( 60 ,  50 ,  10 ).  
     
     
         14 . A paper or board machine according to any one of  claims 9  to  12 , characterized in that the reel-up ( 30 ) is both a windup and an unwind station.