EP0674045A2 - Dispositif pour couper et enfiler la bande d'enfilement d'une bande de papier - Google Patents

Dispositif pour couper et enfiler la bande d'enfilement d'une bande de papier Download PDF

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Publication number
EP0674045A2
EP0674045A2 EP95104046A EP95104046A EP0674045A2 EP 0674045 A2 EP0674045 A2 EP 0674045A2 EP 95104046 A EP95104046 A EP 95104046A EP 95104046 A EP95104046 A EP 95104046A EP 0674045 A2 EP0674045 A2 EP 0674045A2
Authority
EP
European Patent Office
Prior art keywords
guide plate
strip
counter
transfer
blowing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95104046A
Other languages
German (de)
English (en)
Other versions
EP0674045A3 (fr
Inventor
Winfried Haessner
Karlheinz Straub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0674045A2 publication Critical patent/EP0674045A2/fr
Publication of EP0674045A3 publication Critical patent/EP0674045A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/185—Supporting webs in hot air dryers
    • D21F5/187—Supporting webs in hot air dryers by air jets
    • D21F5/188—Blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a stripping and transfer device for an insertion strip to be threaded into a machine for producing or processing a web, in particular a paper web, according to the preamble of claim 1.
  • Devices of the type mentioned here are used to thread the paper web into a paper manufacturing or processing machine. Because of the large width of the paper web, it is usually not possible to thread the entire width of the paper web. An insertion strip is therefore cut from the web, which is threaded into the paper manufacturing or processing machine and which later results in the full width of the paper web. The threading process takes place when the paper machine is started up or after the web is torn off.
  • the stripping and transfer device can be used practically anywhere on the paper machine, for example at the end of the dryer section or between the smoothing unit and the rolling device.
  • the insertion strip runs over the strip cutting and transfer device. He has to knock off first means to be separated. The resulting front end of the insertion strip is then threaded into the paper machine and, as stated, can then pull the paper web.
  • An essential aspect is that the threading process is carried out at the full, usually very high working speed, which can be, for example, in the range from approximately 1,500 m / min to 2,000 m / min.
  • the insertion strip is not optimally guided, so that no defined leading edge arises even when it is knocked off, so that threading is problematic and often also fails.
  • the stripped strip can often not be picked up correctly by subsequent devices, so that the threading process fails.
  • the pivot axis of the guide plate receiving and transferring the insertion strip is formed by an air distribution pipe. This results in a compact structure of the device of low weight and a particularly simple transfer of the air supplied by a blown air source, which is emitted via blower elements.
  • a device which is characterized in that air guide tubes are assigned to a second row of blowing nozzles assigned to an air distribution tube, which are arranged on the rear side of the guide plate facing away from the lead-in strip and end near its transfer edge in blowing air outlets.
  • the blown air is thus brought directly to the transfer edge of the guide plate, so that an air flow stabilizing the lead-in strip is formed there.
  • the insertion strip is guided precisely even after it has left the guide plate and is safely knocked off during a separation process and transferred safely to subsequent guide devices.
  • the guide plate on a scraper bar of the paper machine is articulated.
  • This carries a scraper blade, which primarily serves to clean the outer surface of a roller assigned to the scraper bar or a cylinder during operation of the paper machine or to remove the web from the roller in the event of web breaks.
  • the fact that the baffle is attached directly to the scraper bar, which is already present, ensures optimal accessibility to the paper machine. Since the guide plate is pivotally articulated on the scraper bar, it can be brought into a rest position in which it practically rests against the scraper bar and takes up little space.
  • FIG. 1 shows a schematic side view of a stripping and transfer device, which is referred to below as device 1. It comprises a guide plate 3, also referred to as a table plate, which is pivotably attached to a scraper bar 5 of a paper manufacturing or processing machine which is only indicated here.
  • the pivot axis of the guide plate 3 is formed by an air distribution pipe 9 held by at least one bearing block 7, which is acted upon by a blown air source with a pressurized gaseous medium, preferably compressed air.
  • the scraper bar 5 carries a conventional scraper 11, also known as a scraper blade, which serves to remove the paper web from a roller 13 or a drying cylinder of the paper machine when threading a paper web into the paper machine (when starting up or after a paper tear).
  • the paper web runs directly from the roller 13 to a paper guide roller 14 and from there along the line 2 to a following device, not shown, for example to a smoothing unit.
  • a following device for example to a smoothing unit.
  • one of the two edges of the paper web for example by means of one here, is not illustrated tip cutter, an insertion strip 15 cut off.
  • the course of the insertion strip 15 is shown with a solid line, while it is transferred from the roller 13 to the following devices of the paper machine with the aid of the device 1.
  • a dashed line indicates that the insertion strip 15 is previously guided downward from the scraper 11 when the device 1 is deactivated, which is also indicated by a dashed line.
  • the guide plate 3 is pivoted downward about the air distribution pipe 9 serving as the pivot axis and lies closely against the scraper bar 5.
  • the baffle 3 is angled substantially in a V-shape, the fold line extending perpendicularly into the image plane.
  • the two legs of the V-shaped guide plate 3 form an obtuse angle, the first leg of which is attached to the air distribution pipe 9 and the second leg of which extends from the air distribution pipe 9 starting from the kink line.
  • an actuating device consisting of a piston-cylinder unit 17 engages with its first end on a bearing 18, while its second end is attached to the scraper beam 5 via an abutment 19.
  • the piston In the activated position of the piston-cylinder unit 17, the piston is moved out of the cylinder, so that the guide plate 3 is brought into the position shown in solid lines in FIG. 1 against the effect of gravity.
  • the cylinder In the inactivated position, the cylinder is retracted into the piston of the piston-cylinder unit 17, so that the guide plate 3 is in its position which is pivoted downward, shown here by a broken line.
  • the distance A of the first bearing 18, compared to a line 20 that intersects the pivot axis of the air distribution pipe 9 and is parallel to the longitudinal axis of the piston-cylinder unit 17, is smaller than when the bearing 18 is approximately the same height as the air distribution pipe 9. This position is set in the transfer position of the device 1 shown in FIG. 4.
  • the baffle 3 lies in its inactivated position close to the surface of the scraper bar 5 and takes up little space.
  • the piston-cylinder unit 17 it is also possible to design the piston-cylinder unit 17 to be double-acting, so that the guide plate 3 is displaced into its rest position under the action of the piston-cylinder unit 17.
  • the air distribution pipe 9 has a first row of blowing nozzles 21, which are arranged along an imaginary line running in the longitudinal direction of the air distribution pipe 9 and whose blow-out openings are close to the front side of the guide plate 3 facing the insertion strip 15.
  • the air distribution pipe 9 is provided with a second row of blowing nozzles, each of which opens into an air guide tube 23 and which are arranged on the rear side of the guide plate 3 facing away from the insertion strip 15.
  • the ends of the air guide tubes 23 facing away from the air distribution tube 9 form blown air outlets 25 which open on the rear side of the guide plate 3 in the immediate vicinity of a transfer edge 27 of the guide plate 3.
  • the blown air outlets 25 are arranged and aligned such that the blown air flowing out of them emerges along an imaginary extension line of the guide plate 3 and acts beyond its transfer edge 27.
  • the air emerging from the first blowing nozzles 21 and supplied by the air distribution pipe 9 flows approximately tangentially onto the front side of the guide plate 3, so that the air flow lies against the front side and follows it in the direction of the conveying direction of the insertion strip 15 due to the Coanda effect.
  • the lead-in strip 15, which comes from the roller 13 and is transferred to the left via the guide plate 3, is transferred to a counter guide plate 29, also referred to as a secondary table.
  • the counter baffle 29 is pivotally mounted. It can be pivoted from the activated position shown in solid lines in FIG. 1 into a rest position shown in dashed lines, in which it hangs essentially vertically downward.
  • an inlet edge 31 is provided which, as can be seen from the broken line, can be formed on a flat plate which is fastened to the counter baffle plate 29 or forms an extension thereof.
  • the inlet edge 31 can be formed by a sheet 33 which is angled downwards, the fold line of which is perpendicular to the image plane.
  • the angled plate 33 forms an angle with the counter-guide plate 29 which can be less than or equal to or greater than 90 °; it can therefore also be angled backwards, as is indicated by a dash-dotted line in FIG. 1.
  • the transfer edge 27 also forms an angle of ⁇ 90 ° with the direction of advance of the insertion strip 15.
  • the inlet edge 31 can also be toothed, so that the feed strip 15 is reliably knocked off.
  • the tight guidance of the insertion strip 15 over the transfer edge 27 also makes it possible to arrange the transfer edge 27 serving as a tear-off edge and the inlet edge 31 at a distance from one another, so that larger tolerances are permissible and adjustment work during the assembly of the device 1 can be carried out easily.
  • the transfer edge 27 of the guide plate 3 and the inlet edge 31 of the counter guide plate 29 form separating elements of a separating device also referred to as a knock-off device.
  • a separating device also referred to as a knock-off device.
  • a third blowing element 35 Near the inlet edge 31 there is a third blowing element 35, through which air is directed onto the upper side of the counter baffle plate 29 facing the insertion strip 15. Blowing nozzles 37 of the third blowing element 35 ensure that the air flows in the running direction of the insertion strip 15 onto the counter-guide plate 29 and thus further accelerates and guides the insertion strip 15 in the running direction.
  • FIG. 1 shows that the stripping and transfer device 1 has a pivotable guide plate 3, which is basically also rigid with a pivotable one attached mating guide plate 29 cooperates.
  • the scraper bar 5 can be equipped with an additional blowing device, which has a fourth blowing element 39 above the guide plate 3.
  • the fourth blowing element 39 has a row of nozzles 41 which blow air approximately horizontally from right to left against the underside of the insertion strip 15, so that the latter strips cleanly from the scraper 11 and is transferred to the front side of the guide plate 3 without wrinkling.
  • the fourth blowing element 39 can also have a row of blowing nozzles, not shown here, which blows air vertically upwards into the wedge-shaped gap, which is formed on the one hand by the scraper 11 and on the other hand by the detaching insertion strip 15.
  • the nozzles of the row of nozzles 41 can also be pressurized with compressed air in order to ensure an optimal curved path of the insertion strip 15 and thus secure guidance and transfer of the paper strip from the scraper 11 to the front side of the guide plate 3 .
  • the fourth blowing element 39 can also be designed to be pivotable and have only a single row of nozzles, which can blow air upwards or to the left.
  • the lead-in strip 15, which is removed from the roll 13 by the strip-off and transfer device 1, is passed on to the left in FIG. 1 and delivered to further guiding devices. There, the insertion strip 15 is guided securely by the air flow emerging from the third blowing element 35 or its blowing nozzles 37, so that a wrinkle-free and smooth transport of the insertion strip 15 is ensured.
  • the pivot axis of the counter guide plate 29 is also designed here as an air distribution pipe 43, which is provided with a row of blowing nozzles 45 which let air escape in the transport direction of the introduction strip 15.
  • the paper web, together with the lead-in strip 15, runs downward from the scraper 11 following the force of gravity.
  • the baffle 3 is in its inactive position and is placed close to the scraper bar 5.
  • the counter guide plate 29 can already be activated and aligned in the direction of the guide plate 3.
  • the insertion strip 15 runs downwards without any guidance; it performs flapping movements, a lateral offset of the strip is also possible.
  • the piston-cylinder unit 17 is activated, which is indicated in FIG. 4.
  • the guide plate 3 is in Figure 4 in an intermediate position between the rest and the transfer or working position shown in Figure 1.
  • the guide plate 3 is preferably jerkily shifted into the transfer position by the piston-cylinder unit 17, the air flowing out on the underside of the guide plate 3 keeping the paper strip taut even beyond the transfer edge 27 even during pivoting.
  • the insertion strip 15 is knocked off or separated or perforated and torn off by the interaction of the transfer edge 27 with the inlet edge 31, that is to say by the separating device.
  • the new beginning of the insertion strip 15 is received by the counter baffle plate 29 and guided and passed on exactly by the air stream emerging from the blowing nozzles 27.
  • blowing nozzles 37 on the counter guide plate 29 can be arranged in such a way that the lead-in strip 15 is passed on in a straight line to further guide devices or deflected laterally offset in a cable shear which takes over the further transport.
  • Stripping and transfer devices 1 of the type described here can be used wherever a paper web has to be threaded when starting up a paper machine. It is therefore conceivable to provide such devices between individual groups, preferably at the end of a dryer section, but also in front of and within further sections of a paper manufacturing or processing machine.
  • the guide plate 3 can be attached to a scraper bar 5, that is to say it does not require its own fastening devices which would make access to the paper machine more difficult.
  • the pivotability of the guide plate 3 ensures that service work on the paper machine can be carried out without interference.
  • the counter baffle plate 29 is also designed to be pivotable, access through the device 1 is possible without hindrance if required.
  • the piston-cylinder unit 17 initially slowly moves the guide plate 3 from the rest position shown in FIG Figure 4 shifted position.
  • the distance between the bearing 18 and the line 20 is significantly larger than before, so that the guide plate 3 is now swung almost jerkily past the inlet edge 31 of the counter guide plate 29 in order to ensure a safe separation of the insertion strip 15.
  • a clear distance can remain between the transfer edge 27 and the inlet edge 31, that is to say between the end or separating edges of the separating device.
  • the lead-in strip 15 is also kept taut by the air flow beyond the transfer edge 27, it is securely separated when passing through the inlet edge 31 serving as a separating or tear-off edge.
  • the resulting free end of the insertion strip 15 is guided safely through the air stream emerging from the blown air outlets 25 to the counter baffle plate 29 and arrives there in the guide region of the third blower element 35 or the blower nozzles 37.
  • FIGS. 6 and 7 show a further exemplary embodiment of a strip cutting and transfer device, which essentially corresponds to the exemplary embodiment according to FIG. 1, the same parts being designated with the same reference symbols. A repeated description of these parts is therefore omitted here.
  • the only difference from the first embodiment is that the third blowing element 55 is arranged below the counter baffle 29.
  • the blowing nozzles 57 are directed downwards in the direction of the sloping insertion strip.
  • the dashed illustration of the third blowing element 35 in the original position is intended to indicate that the upper blowing element can also be provided in addition to the lower blowing element 55.
  • the third blowing element 35 shown in the first exemplary embodiment has the task of accelerating the insertion strip 15 or of transporting it further on the guide plate.
  • the third blowing element 55 arranged below the guide plate 29 serves to blow off the part of the lead-in strip 15 that is cut off and falls downward and to guide it safely away from the transfer edge 27. This can prevent residual scraps of the insertion strip 15 from being dragged along on the second guide plate 29. The separation security can thus be increased.
  • the effect of the third blowing element 55 is illustrated again in FIG. 7.
  • the downward falling insertion strip 15 can be drawn towards the air flow and thus removed from the area of action of the second blowing element 25.

Landscapes

  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP95104046A 1994-03-21 1995-03-20 Dispositif pour couper et enfiler la bande d'enfilement d'une bande de papier. Withdrawn EP0674045A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4409660A DE4409660A1 (de) 1994-03-21 1994-03-21 Streifenabschlag- und Überführeinrichtung
DE4409660 1994-03-21

Publications (2)

Publication Number Publication Date
EP0674045A2 true EP0674045A2 (fr) 1995-09-27
EP0674045A3 EP0674045A3 (fr) 1997-04-23

Family

ID=6513391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104046A Withdrawn EP0674045A3 (fr) 1994-03-21 1995-03-20 Dispositif pour couper et enfiler la bande d'enfilement d'une bande de papier.

Country Status (7)

Country Link
EP (1) EP0674045A3 (fr)
JP (1) JPH07323946A (fr)
KR (1) KR950032888A (fr)
BR (1) BR9500955A (fr)
CA (1) CA2144623A1 (fr)
DE (1) DE4409660A1 (fr)
FI (1) FI951291A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537173C1 (de) * 1995-10-06 1996-12-19 Voith Sulzer Papiermasch Gmbh Streifenabschlageinrichtung
EP1279765A1 (fr) * 2001-07-26 2003-01-29 Voith Paper Patent GmbH Procédé pour transferer une bande fibreuse et machine pour la fabrication d'une bande fibreuse
EP2058433A2 (fr) 2007-11-10 2009-05-13 Andritz Küsters GmbH Dispositif de transfert d'une bande de matériau flexible, en particulier une bande de papier ou de carton
DE102014222548A1 (de) * 2014-11-05 2015-10-29 Voith Patent Gmbh Abschlagvorrichtung zum Abschlagen eines Randstreifens einer Materialbahn, Verfahren zum Abschlagen eines Randstreifens der Materialbahn und Verwendung der Abschlagvorrichtung und des Verfahrens

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2208381A1 (fr) * 1997-06-20 1998-12-20 Roman C. Caspar Appareil pour tailler et engager une queue de feuille continue dans une machine a papier
DE19929927A1 (de) 1999-06-29 2001-01-04 Voith Paper Patent Gmbh Vorrichtung zum Trennen und Überführen eines Einführstreifens
DE10009897A1 (de) * 2000-03-01 2001-09-06 Voith Paper Patent Gmbh Schaber
DE10031644A1 (de) * 2000-06-29 2002-01-17 Voith Paper Patent Gmbh Vorrichtung zum Überführen eines Streifens einer flexiblen Materialbahn
DE10045141A1 (de) * 2000-09-13 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zum Überführen eines Streifens einer flexiblen Materialbahn
FI124219B (fi) * 2007-11-14 2014-05-15 Valmet Technologies Inc Kaavinlaitteisto päänvientinauhan irrottamiseksi liikkuvasta pinnasta kuiturainakoneella
DE102017008044A1 (de) * 2017-08-25 2019-02-28 Heuft Systemtechnik Gmbh Ausleitvorrichtung mit Coanda-Stabilisierungseinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904344A (en) * 1989-04-17 1990-02-27 Beloit Corporation Automatic web threading apparatus and method
DE3924897A1 (de) * 1989-07-27 1991-02-07 Escher Wyss Gmbh Vorrichtung zum ueberfuehren und trennen eines ueberfuehrstreifens einer papierbahn
DE9109313U1 (de) * 1991-07-27 1991-09-26 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Führen einer laufenden Bahn
EP0554339A1 (fr) * 1990-10-24 1993-08-11 Fibron Machine Corp Appareil de coupe de queue de papier a couteaux a contra-rotation.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904344A (en) * 1989-04-17 1990-02-27 Beloit Corporation Automatic web threading apparatus and method
DE3924897A1 (de) * 1989-07-27 1991-02-07 Escher Wyss Gmbh Vorrichtung zum ueberfuehren und trennen eines ueberfuehrstreifens einer papierbahn
EP0554339A1 (fr) * 1990-10-24 1993-08-11 Fibron Machine Corp Appareil de coupe de queue de papier a couteaux a contra-rotation.
DE9109313U1 (de) * 1991-07-27 1991-09-26 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Führen einer laufenden Bahn

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537173C1 (de) * 1995-10-06 1996-12-19 Voith Sulzer Papiermasch Gmbh Streifenabschlageinrichtung
US5799556A (en) * 1995-10-06 1998-09-01 Voith Sulzer Papiermaschinen Gmbh Strip severing device for paper web
EP1279765A1 (fr) * 2001-07-26 2003-01-29 Voith Paper Patent GmbH Procédé pour transferer une bande fibreuse et machine pour la fabrication d'une bande fibreuse
EP2058433A2 (fr) 2007-11-10 2009-05-13 Andritz Küsters GmbH Dispositif de transfert d'une bande de matériau flexible, en particulier une bande de papier ou de carton
DE102007053700A1 (de) 2007-11-10 2009-05-14 Andritz Küsters Gmbh Vorrichtung zum Überführen einer flexiblen Materialbahn, insbesondere einer Papier- oder Kartonbahn
EP2058433A3 (fr) * 2007-11-10 2010-05-05 Andritz Küsters GmbH Dispositif de transfert d'une bande de matériau flexible, en particulier une bande de papier ou de carton
DE102014222548A1 (de) * 2014-11-05 2015-10-29 Voith Patent Gmbh Abschlagvorrichtung zum Abschlagen eines Randstreifens einer Materialbahn, Verfahren zum Abschlagen eines Randstreifens der Materialbahn und Verwendung der Abschlagvorrichtung und des Verfahrens

Also Published As

Publication number Publication date
JPH07323946A (ja) 1995-12-12
DE4409660A1 (de) 1994-08-18
FI951291A (fi) 1995-09-22
KR950032888A (ko) 1995-12-22
EP0674045A3 (fr) 1997-04-23
BR9500955A (pt) 1995-10-17
FI951291A0 (fi) 1995-03-20
CA2144623A1 (fr) 1995-09-22

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