摘要:
The invention concerns a method in winding of a paper web, in which method the paper web (W) is unwound from a paper reel (10) and in which method the paper web (W) is slit in a slitter-winder (30) longitudinally into component webs (W n ), which component webs (W n ) are further wound into component rolls. The paper web (W) is passed through the slitting station (40) of the slitter-winder (30), in which slitting station component webs (W n ) are slit out of the web (W) by means of blades (44), and the ends of the slit component webs (W n ) are cut off in a cutter device (45) into predetermined measures before the component webs (W n ) are passed into the winding stations. The winding device in winding of a paper web or equivalent comprises an unwind station (10) and a slitter-winder (30), which includes a slitting station (40), a cutter device (45), and the winding stations for component rolls. The cutter device (45) of the slitter-winder (30) includes an arrangement for cutting the component webs (W n ) into predetermined measures.
摘要:
The invention concerns a method in reeling of a paper or board web, wherein the web (W) is supported during the reeling by means of a belt (19), which runs through the nip between the reeling cylinder (11) and the reel spool (12', 12) and which runs as guided by a roll (13) and by the reel spool (12',12), wherein, when the paper or board reel (14) that is formed on the reel spool (12') becomes complete, the reel is pushed by means of the roll (13) into the change position and a new reel spool (12) is lowered into the gap between the roll (13) and the reeling cylinder (11) and the change device (15) is lowered onto the new reel spool (12). In the method, the tip is cut out of the web (W) from the middle towards the edges by means of water cut nozzles, and the tip is blown to around the new reel spool (12) by means of tip blowing, and an adhesive is sprayed onto the web which is passing onto the paper or board reel (14). The tip of the web (W) is cut at the same time with the gluing of the edges of the web (W) passing onto the paper or board reel (14) so that the adhesive is spread at a uniform distance (16) from the cut line (17) so as to glue the final end of the web (W) passing onto the full paper or board reel (14) to fix said final end onto the face of the paper reel (14). Further, the invention concerns a device in reeling of a paper or board web, which device comprises a reeling cylinder (11) and a reel spool (12',12), the web (W) being fitted to run through the nip between said cylinder and spool onto the reel spool (12',12). The web (W) is supported during the reeling by means of a belt (19), which runs over the reeling cylinder (11) and the reel spool (12',12) and which belt is fitted to run as guided by a guide roll (13) and the reel spool (12',12). Further, the device comprises members for guiding the web (W) tip that was cut at the reel change stage onto the new reel spool (12) and a change device (15), which includes displaceable water cut nozzles and displaceable adhesive nozzles. The change device (15) includes sledges or equivalent transfer devices. To the same sledge (26) or equivalent, one water cut nozzle and one adhesive nozzle have been attached. The sledges (26) or equivalent are fitted to move along guides or equivalent of the change device (15) from the middle of the paper or board web (W) towards the edges by the intermediate of an actuator so that the water cut nozzles and the adhesive nozzles of the change device (15) operate substantially at the same time and are placed in a relative position so that, parallel to each water cut (17), substantially at a uniform distance from the water cut line (17), an adhesive strip (16) is formed at the side of the web portion that passes onto the complete reel (14).
摘要:
Process for dewatering a paper web (W) in a press section of a paper machine, in particular for printing paper qualities whose grammage is in the range of 40...80 g/m 2 . The press section comprises a pick-up roll (13), on whose suction zone (13a) the web (W) is detached at the pick-up point (P) from the forming wire (10) and is passed on the pick-up felt (15) into the first press nip (N 1 ) in the press section, in which nip the pick-up felt acts as a press fabric. The press section includes an extended nip (Np), which is placed after the first roll nip. Into this extended nip (Np), the web (W) is passed as a closed draw on support of a fabric face or roll face. The first nip (N 1 ) in the press section is a roll nip with relatively low load, which acts as a front nip, in whose area almost or approximately one half of the total amount of the water contained in the web (W) entering into the front nip is removed from the web (W). The extended nip (Np), which is the second press nip in the press section, is formed against a smooth-faced (40';41') back-up roll (40;41). Only one press fabric (15;30) which receives water passes through the press zone (NP) of the extended nip (Np), said fabric (15;30) being arranged preferably at the side of the face of the web (W) opposite in relation to the web face placed at the side of the forming wire (10), from which forming wire (10) the web was detached at the pick-up point (P).
摘要:
The invention concerns a method in threading of a paper web from the dryer section to a following finishing device by means of a rope threading arrangement. In the method, in the dryer section (11), a leader strip is separated from the edge of the paper web (W), said leader strip is guided to between the ropes (K1, K2) included in the rope threading arrangement, and the leader strip is carried to the finishing device (10) on support of the ropes (K1, K2). At the inlet side of the last drying cylinder (2a) in the dryer section (11), a rope gap (KK) is formed out of the ropes (K1, K2), and the leader strip, which is supported by the drying wire (5), is transferred by means of air blowing into said rope gap (KK). The leader strip is passed by means of said ropes (K1, K2) over the last drying cylinder (2a) to the finishing device (10). The invention also concerns a device intended for carrying out the method.
摘要:
The invention relates to an assembly for preventing plugging of a narrow, slot-orifice-type jet nozzle 6 used in a paper and board coater in which jet nozzle extends over the entire cross-machine width of the web being coated, said coater comprising an application chamber (11), a coating mix infeed channel (10) connected thereto and a slot orifice (6) as well as at least one infeed port for feeding the coating mix into said application chamber (11). According to the invention, an easily cleanable strainer element (12) is placed close to the applicator apparatus, said strainer serving to separate aggregates of the coating mix that otherwise could plug the slot orifice (6).