EP1137846B1 - Dispositif de transfert - Google Patents

Dispositif de transfert Download PDF

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Publication number
EP1137846B1
EP1137846B1 EP99950781A EP99950781A EP1137846B1 EP 1137846 B1 EP1137846 B1 EP 1137846B1 EP 99950781 A EP99950781 A EP 99950781A EP 99950781 A EP99950781 A EP 99950781A EP 1137846 B1 EP1137846 B1 EP 1137846B1
Authority
EP
European Patent Office
Prior art keywords
air duct
transfer apparatus
area
nozzle
suction tube
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.)
Expired - Lifetime
Application number
EP99950781A
Other languages
German (de)
English (en)
Other versions
EP1137846A1 (fr
Inventor
Wolf Gunter Stotz
Andreas Hoferer
Hans-Ulrich Banzhaf
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent 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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1137846A1 publication Critical patent/EP1137846A1/fr
Application granted granted Critical
Publication of EP1137846B1 publication Critical patent/EP1137846B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/28—Registering, tensioning, smoothing or guiding webs longitudinally by longitudinally-extending strips, tubes, plates, or wires
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/52—Auxiliary process performed during handling process for starting
    • B65H2301/522—Threading web into machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/60—Coupling, adapter or locking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/84—Paper-making machines

Definitions

  • the invention relates to a device for transferring a threading strip or a material web inside a manufacturing machine and / or processing of the material web, by one Takeover area along to a transfer area a web path, according to the preamble of the claim 1.
  • the transfer device includes a recording head that one air duct connected with a suction hose having.
  • the threading strip or the entire web of material is made possible by a vacuum Suction hose from the web path led out. It has been shown that leadership of the threading strip / the material web in the air duct of the recording head and in particular in the area of Inlet opening of the suction hose could be improved is.
  • a transfer device proposed with the features of claim 1.
  • the recording head at least one Nozzle for introducing an additional flow into the Has air duct and / or in the suction hose.
  • the additional flow can ensure that the web of material or one of them detached threading strips not too close to the Walls of the air duct and braked there becomes.
  • a wobble also known as fluttering preferably completely of the threading strip, at least essentially avoided, so that striking the threading strip / Material web on the wall of the air duct can be safely avoided.
  • additional flow which are preferably essentially in the running direction additional flow directed towards the material web also the tightening of the threading strip / the material web.
  • the transfer device for transfer one of a material web, for example paper, Cardboard, plastic, textile web or the like, separate threading strip is used.
  • An embodiment is particularly preferred the transfer device, which is characterized by that the nozzle in the area of the suction opening arranged of the air duct and preferably with the area around the machine.
  • the nozzle in the area of the suction opening arranged of the air duct and preferably with the area around the machine are both via the intake opening of the Air duct as well as ambient air via the additional nozzle sucked.
  • the air currents generated in this way can both stick the threading strip on a wall of the air duct as well Fluttering of the threading strip is reliably prevented become. Since in this embodiment the additional flow one by vacuuming the suction hose generated air flow, the structure can the transfer device simplified and thus whose costs are reduced.
  • the Transfer device in another advantageous embodiment of the Transfer device is provided that the Introducing an additional flow into the air duct and / or nozzle serving the suction hose in the connection area of the suction hose to the recording head is arranged.
  • the preferably on the recording head arranged nozzle via a pressure hose is connected to an overpressure device with whose help is a pressurized gaseous Medium, preferably air, in the air duct and / or can be inserted into the suction hose.
  • a pressurized gaseous Medium preferably air
  • the medium jet emerging from the nozzle which is preferably essentially in the direction of web travel is directed also affects the negative pressure in which the nozzle - seen in the direction of web travel - upstream area of the air duct.
  • the air speed in the area of the intake opening of the Air duct 1.2 times to 4 times the current Running speed of the threading strip is while the running speed in the area of the entry opening of the suction hose preferably that 1.2 times to 3 times the running speed of the Threading strip is.
  • the Speed of air flow in the air duct respectively in the inlet area of the suction hose the following parameters are preferably taken into account: Width of the threading strip / material web, the surface roughness of the material web, that is the frictional resistance between the material web and air, as well as the speed of the Threading strip.
  • the transfer device described below is generally related to the transfer a material web, for example paper or Cardboard web, from one takeover area to one Transfer area can be used along a path.
  • the web path is through facilities, such as guide rolls, rollers and the like, established.
  • the transfer device it is possible to use a web of material with your entire width or just one of the To transfer material web separated threading strips.
  • FIGS. 1 to 10 explained parts of the transfer device it is assumed that they are to be transferred serve a threading strip.
  • the within a manufacturing and / or processing machine used for the material web Transfer device includes a flexible or made of a flexible material
  • Suction hose with a recording head is connected to an air duct with an intake opening for the threading strip.
  • the suction hose connected to a vacuum source is with a - preferably variable - negative pressure acted upon. This will cause the intake opening ambient air in the recording head Air duct sucked in.
  • the air flow generated in the process is used, among other things, to guide the threading strip in the pick-up head and for its transport through the suction hose.
  • the transfer device further includes an in guide device, not shown in the figures, with the help of the suction hose and the recording head can be moved in and against the direction of web travel are.
  • the speed at which the recording head and the suction hose during a transfer operation shift is always smaller, preferably significantly lower than the running speed, with which the threading strip during of the transfer process through the machine is.
  • On the structure and function of the guidance system is also referred to DE 197 24 123.9. The following are several embodiments of the recording head or the one in it arranged air duct based on the figures explained.
  • Figure 1 shows a section of a first embodiment of a recording head 1 in plan view.
  • the recording head 1 comprises several articulated with each other connected limbs, of which in the illustration according to Figure 1 only the links A to K are recognizable.
  • the recording head 1 has one here air channel 3 running essentially S-shaped on that at its one end 5 to the outside of the web path, not shown in Figure 1 Suction hose is connected and with its other end 7 in the path of the threading strip / Material web protrudes.
  • Suction hose is connected and with its other end 7 in the path of the threading strip / Material web protrudes.
  • first link A of the recording head 1 is an air duct beginning segment 9 attached, which forms the beginning of the air duct 3.
  • the nozzles 15 In the area of the intake opening 13 of the air duct 3 there are several slot-shaped nozzles 15, that here in the top 14 and the bottom of the air duct start segment 9 introduced are.
  • the nozzles 15 preferably penetrate the wall having a rectangular cross section Air duct 3.
  • the Suction hose not shown, with a negative pressure is 15 additional air from the environment via the nozzles the machine is sucked into the air duct 3.
  • Additional air flow creates an air boundary layer on the walls of the air duct 3, which ensures can be that the threading strip not too close to the air duct walls and there is slowed down. This will make the trouble-free Guidance of the threading strip supported.
  • Figure 2 shows a plan view of part of the with reference to the recording head 1 described in FIG Area of its suction opening 13. Same parts are provided with the same reference numerals, so that insofar referred to the description of Figure 1 becomes. It can be seen that here only two slot-shaped nozzles 15 introduced into the top 14 are, while in the illustrated in Figure 1 Embodiment five nozzles on at least the top 14 are arranged. Preferably also at least one further slit-shaped nozzle on the underside in the area of the suction opening 13 of the air duct 3 attached in this.
  • the nozzles 17 are here formed by holes and therefore have a circular cross section. Through the through the Sucking in the ambient air through the nozzles 15 and 17 generated additional air flows, which with arrows 18th are indicated, a fluttering of the threading strip and sticking of the threading strip securely prevented on the walls of the air duct 3 become.
  • the nozzles 15 and 17 are in that shown in Figure 2 Embodiment all over with Dashed line shown longitudinal central axis 19 of the air duct 3 inclined by an angle ⁇ ⁇ 60 °.
  • the angle of inclination ⁇ is a preferred one Embodiment in a range of 30 ° up to 45 °. It has been shown that in each case a nozzle on the top and bottom and the Side walls of the recording head 1 can suffice, preferably around the one in the suction opening 13 having a rectangular cross section Air duct 3 sucked or introduced Threading strips in the desired manner to lead.
  • FIG. 3 shows a section of a further exemplary embodiment of the recording head 1 in longitudinal section. It can be seen that the nozzles 15 and 17 arranged in the link A of the recording head are.
  • the nozzles 17 have a circular cross section on.
  • the air duct 3 points in the area of its Intake opening 13 has a rectangular cross section on, with the long sides of the rectangle in Mouth area of the air duct 3 with a radius R are provided.
  • the corners of the Air duct rounded. Because no sharp Edges can be torn off into the Intake opening 13 of the air duct 3 is sucked in / introduced Threading strips are avoided. Due to the rounded, in its mouth area trumpet-shaped contour of the air duct also the flow of the sucked air in influenced as desired.
  • the air duct 3 is flared, that is to say the upper duct wall 23 and the lower duct wall 25 diverge in the direction of flow, so that the height of the air duct 3 is continuously increased becomes.
  • a first damming element 29 is arranged on the upper duct wall 23 and a second damming element 29 'is arranged opposite one another on the lower duct wall 25, which preferably extends over the entire width of the Extend air duct 3 and reduce the free flowable cross-sectional area of the air duct 3.
  • the subsequent air duct section is conical in the direction of flow, that is to say the upper part wall 23 and the lower part wall 25 of the air duct 3, which are formed here by surfaces of the baffle elements 29, 29 'diverge in the direction of flow.
  • the maximum value of the height H o of the air duct 3 in the region of the baffle elements 29, 29 ′ is approximately 0.6 times to 0.8 times the average height of the part of the air duct 3 downstream of the baffle elements 29, 29 ′.
  • the baffle elements 29, 29 ' are preferably streamlined, so that there is only a slight pressure loss.
  • section B of the Receiving head 5 further stowage elements 29 and 29 ' provided that are formed identically to that dam elements provided in link A. Due to the conical design of the air duct 3 in the area of its first section 21 and that in the subordinate Part of the air duct arranged baffle elements the air flow is accelerated repeatedly, causing the pull on the threading strip is increased. The threading strip is thus in the area of the baffle elements 29, 29 'streamlined, being accelerated the air flow in the areas mentioned also fixation or leadership of the threading strip is improved.
  • Figure 4 shows a section of that shown in Figure 3 Embodiment of the recording head 1, namely a front view of the suction opening 13 of the air duct 3.
  • the longitudinal grooves 31 thus have a rectifier function on.
  • the longitudinal grooves 31 are preferred at all "narrow points" of the air duct 3 provided, i.e. in the areas where the Cross-sectional area of the air duct that can be flowed through freely has a constriction, for example in the area the suction opening 13 and the baffle elements 29, 29 '.
  • the longitudinal grooves 31 have a substantially right-angled contour, which is preferred is sharp, so that undesirable cross currents tear off at the sharp edges.
  • FIG. 5 shows a detail of a further exemplary embodiment of the receiving head 1 having a plurality of links, in longitudinal section, namely the connection area of the receiving head 1 to a suction hose 33 that can be subjected to negative pressure the outer diameter of which is essentially the same as the inner diameter of the suction hose 33.
  • the height H A of the outlet opening 35 of the air duct 3, from which the ambient air sucked in via the suction opening 13 and optionally the nozzles 15 and 17 emerges from the air duct 3, is less than the height H S or the diameter of the suction hose at this point, the width of the preferably rectangular air duct 3 in the region of its outlet opening 35 being approximately the same width as the suction hose.
  • the term “approximately” is understood to mean a width of the outlet opening which is preferably in a range from 80% to 100% of the width of the suction hose.
  • In member M of the recording head 1 are above and at least one below the air duct 3 Nozzle 37 arranged, each with a a line indicated pressure hose 39 with a only with a symbol overpressure device 41 are connected.
  • the overpressure device 41 for example a compressor is preferably from the environment air is sucked in, compressed and over the machine the pressure hoses 39 fed to the nozzles 37, the Inlet openings 43 in the flow path of the the suction opening 13 sucked in air, here in the suction hose 33, on an end face 45 of the Recording head 1, here the link M, are arranged.
  • the air flow flowing out of the nozzles 37 is indicated by arrows 47 is essentially parallel to that from the outlet opening 35 of the Air duct 3 emerging air flow and the Wall 49 of the suction hose 33 aligned.
  • the nozzles 37 connected to the environment, so that when a vacuum is applied of the suction hose the additional flow (s) generated by sucking in the ambient air will become. It has been shown that too this ensures adequate management and streamlining of the threading strip can be realized.
  • On an overpressure device can, if necessary be dispensed with, so that the structure of the transfer device is simplified.
  • the speed of the air flow in the range of The suction opening of the suction hose 33 is preferably 1.2 times to 3 times the current one Running speed of the threading strip respectively the material web.
  • the running speed the material web can reach up to 2000 m / min and be above.
  • the Quantity and speed preferably with the help a control and regulating device adjustable is in the area where the free Flow cross section changes abruptly, i.e. in the area the outlet opening 35 of the air duct 3, ensures safe guidance of the threading strip become.
  • the additional flow can also the air flow emerging from the air duct 3 influenced in the desired manner, in particular whose speed can be set. For this a remote control can be used, the one manual influencing of the air flow by a Operator enabled.
  • Figure 10 shows a cross section through the in Figure 5 shown recording head along the section line A-A in three different embodiments A, B and C.
  • variant A left figure
  • each arranged a plurality of nozzles 37 have circular cross section
  • the Cross sections of the nozzles in this embodiment are different.
  • you can the nozzles 37 also have an equal cross-sectional area exhibit.
  • the nozzles 37 are here over the entire area of the connector (link M) of the recording head 1 arranged distributed.
  • Version B (middle figure) above and below the air duct 3 each two slit-shaped nozzles 37 are arranged, which have different cross-sectional areas and essentially parallel to the long side of the substantially rectangular air duct 3 run.
  • Version C (right Figure) is above and below the air duct 3 each a nozzle 37 is provided, the one have circular cross-section. It it is clear that the number of nozzles 37 in the recording head is variable, but also others Cross-sectional shapes than those shown in Figure 10 are conceivable. It is important that with the help of directly with the environment and / or with the overpressure device 41 connectable nozzles 37 an influence that from the air duct 3 of the recording head 1 flowing into the suction hose 33 is possible in the desired manner.
  • Figure 6 shows a perspective view a section of an embodiment of a Air duct 3 in the connection area to a suction hose 33.
  • the lower channel wall 25 and the upper one Channel wall 23 of a first longitudinal section 55 and an adjoining longitudinal section 57 existing extension line 53 are opposite inclined to an imaginary horizontal that the height of the air duct 3 in the flow direction increases. From Figure 6 it can be seen that in the area of the first longitudinal section 55 the channel walls 23 and 25 less than the imaginary horizontal are more inclined than in the area of the second Longitudinal section 57. It is clear that the cross-sectional area of the air duct 3 in the flow direction gradually, in a smooth transition, the means without a sudden expansion of the channel cross-section, gets bigger.
  • this cross-section too is still significantly smaller than the cross section of the suction hose 33 in the area of the outlet opening 35. This results in the area of the outlet opening 35 an abrupt expansion of the free flow cross section from the smaller Cross-sectional area of the air duct 3 in the larger Cross-sectional area of the suction hose 33.
  • the cross-sectional enlargement leads to a reduction the speed of the air flow. If the nozzles 37 ( Figures 5 to 10) with the overpressure device 41 are connected, this effect with the help of the medium under pressure be compensated.
  • Figures 7 to 9 each show three pictures an embodiment of the extension route 53, ie a longitudinal section of the air duct 3, its cross-sectional area, in particular its height, becomes larger in the direction of flow (arrow 11). It is common to all of the exemplary embodiments that the Extension route 53 of at least one, itself longitudinal section widening conically in the direction of flow of the air duct 3 is formed, the Inclination angle of the upper channel wall 23 and the lower one Channel wall 25 - depending on the embodiment of the extension section - can be different.
  • at the expansion routes shown in Figures 7 and 9 53 of the air duct 3 is dashed indicated the area in which the angle of inclination the channel walls 23 and 25 is changeable.
  • the speed of the Air flow in air duct 3 and that in the suction hose 33 in the right ratio to the running speed of the threading strip must stand so that a desired Guidance of the threading strip realized can be, in particular the following in particular Find parameters taken into account: width of the Threading strip / the material web and the roughness the material web surface. It turned out to be advantageously exposed the air speed at the entry of the threading strip into the take-up head 1.2 times to 4 times the running speed of the threading strip during the transfer process adjust while in the range of Suction hose an air speed is already sufficient which is 1.2 times to 3 times the running speed of the threading strip is.
  • Air duct 3 In the embodiment shown in Figure 1 one of which has an S-shaped course Air duct 3 is seen in the direction of web travel a waist-shaped constriction in the middle 59 provided in which the air duct its has the smallest width. It also becomes clear that the width of the air duct in the remaining areas is essentially constant. Based on these Design of the air duct 3 is a special one safe and trouble-free guidance of the threading strip possible.
  • the air duct essentially has one constant height except in the Areas where they are also referred to as humps Damming elements 29, 29 'are arranged.
  • the height of the air duct 3 in the area of the inlet opening 13 less than three quarters of the following average channel height, taking this Initial height of the air duct then in the direction of flow flared, for example from 14 mm 20 mm.
  • the corners of one rectangular cross-section air duct are provided with a radius, the largest Radius is only half the height of the air duct. Because of this configuration, the Side walls of the rectangular air duct one bowl-shaped, especially half-shell-shaped Contour on. This configuration of the air duct so-called dead spaces can be avoided.
  • the suction hose is turned off during normal operation the manufacturing and / or processing machine, so when the transfer device is in the standby position fresh air, that cools the hose.
  • Introducing the air used for cooling can be used, for example Use a separate suction fan.
  • at the embodiment of the recording head in which Compressed air is introduced into the suction hose via the nozzles 37 cooling can also be done in this way will be realized.
  • the at least one pressure hose 39, through which the Nozzles 37 supplied with air under pressure can, for example, along the suction hose along its length and parallel to it be relocated.
  • the control and regulating device with whose Help the nozzle 37 in the path of the Threading strip inside the take-up head respectively air jets introduced into the suction hose can be influenced is preferably such trained that in the air duct and / or in the amount of additional air introduced into the suction hose and their speed with the help of a remote control before, during and after a transfer operation can be changed.
  • the control and Control devices can for example in the Nozzles 15, 17 and / or 37 provided slides, Terminal points or the like are operated, so that the freely flowable cross section of the nozzles is specifically changeable. This is a defined one Setting the speed and size the medium flow flowing through the respective nozzle, preferably gas flow, especially air flow, possible.
  • the upper channel wall 23 and the lower channel wall 25 of the air duct have on their articulated butt parts the links (see Figure 3) a conical, seen in flow direction in cross section shrinking longitudinal section 51 to during the Pick-up head with its links to the outer contour for example a guide roller, which Air flow and the guided through the recording head Threading strips offer no joint. For this it is necessary that the convex Part of the respective joint in the direction of web travel has.
  • the funnel-shaped in longitudinal section Longitudinal section 51 thus serves the safe Transfer of the threading strip from one link to the next link.

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  • Cleaning In General (AREA)
  • Advancing Webs (AREA)
  • Massaging Devices (AREA)
  • Seal Device For Vehicle (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (25)

  1. Dispositif pour le transfert d'une bande d'enfilage ou d'une bande de matière à l'intérieur d'une machine pour la fabrication et/ou le traitement de la bande de matière, depuis une zone de reprise jusqu'à une zone de dépôt le long d'une trajectoire de la bande, avec un tuyau d'aspiration pouvant être mis sous dépression et avec une tête de réception (1) raccordée au tuyau d'aspiration (33), qui peuvent être déplacés dans le sens de défilement de la bande et dans le sens contraire, dans lequel la tête de réception (1) présente un canal à air (3) raccordé au tuyau d'aspiration (33) et présentant une ouverture d'aspiration (13) pour la bande d'enfilage/la bande de matière, et au moins une buse (15, 17; 37) pour introduire un courant supplémentaire dans le canal à air (3) et/ou dans le tuyau d'aspiration (33).
  2. Dispositif de transfert suivant la revendication 1, caractérisé en ce que la buse (15, 17) est disposée dans la région de l'ouverture d'aspiration (13) du canal à air (3).
  3. Dispositif de transfert suivant la revendication 1 ou 2, caractérisé en ce que la buse (15, 17) est raccordée à l'atmosphère.
  4. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'ouverture d'entrée de la buse (15, 17) dans le canal à air (3) a la forme d'une fente ou une forme sensiblement circulaire.
  5. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la buse (15, 17) est inclinée d'un angle α < 60° par rapport à l'axe central longitudinal (19) du canal à air (3).
  6. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu plusieurs buses (15, 17), en ce que la/les buse(s) (15) installée(s) dans la face supérieure et/ou dans la face inférieure - en regardant dans le sens de défilement de la bande - de la tête de réception (1) de préférence rectangulaire est/sont en forme de fente et en ce que la/les buse(s) (17) installée(s) dans la/les paroi(s) latérale(s) (16) de la tête de réception est/sont sensiblement de forme circulaire.
  7. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la buse (37) est disposée dans la région de raccordement de la tête de réception (1) au tuyau d'aspiration (33).
  8. Dispositif de transfert suivant la revendication 7, caractérisé en ce que la buse (37) est raccordée par un tuyau sous pression à un dispositif de surpression (41), à l'aide duquel un fluide se trouvant sous pression, de préférence de l'air, peut être introduit dans le canal à air (3) et/ou dans le tuyau d'aspiration (33).
  9. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'ouverture d'entrée de la buse (37) dans le tuyau d'aspiration (33) est disposée sur une face frontale (45) de la tête de réception (1).
  10. Dispositif de transfert suivant l'une quelconque des revendications 1 à 9, caractérisé en ce que la pression et/ou le débit du fluide, en particulier de l'air, introduit par la buse (15, 17; 37) dans le canal à air (3) et/ou dans le tuyau d'aspiration (33), est réglable à l'aide d'un dispositif de commande et de régulation.
  11. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur du canal à air (3) dans la région de son ouverture de sortie (35) est inférieure à la hauteur du tuyau d'aspiration (33).
  12. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la largeur du canal à air (3) dans la région de son ouverture de sortie (35) et la largeur de la partie du canal d'aspiration (33) jointive à l'ouverture de sortie (35) sont de grandeur sensiblement égale.
  13. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse de l'air dans la région de l'ouverture d'aspiration (13) du canal à air (3) vaut de 1,2 fois à 4 fois la vitesse de défilement instantanée de la bande d'enfilage/de la bande de matière.
  14. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse de l'air dans la région de l'ouverture d'aspiration du tuyau d'aspiration (33) vaut de 1,2 fois à 3 fois la vitesse de défilement instantanée de la bande d'enfilage/de la bande de matière.
  15. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que le canal à air (3) présente une section transversale rectangulaire au moins dans la région de l'ouverture d'aspiration (13), dans laquelle les coins sont dotés d'un rayon de courbure.
  16. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur du canal à air (3) dans la région de l'ouverture d'aspiration (13) est inférieure à 0,75 fois la hauteur moyenne du canal à air (3) et en ce que le canal à air (3) - en partant de l'ouverture d'aspiration (13) - s'évase en cône dans le sens de l'écoulement.
  17. Dispositif de transfert suivant la revendication 16, caractérisé en ce que, dans la seconde partie (27) se raccordant à la première partie conique (21) du canal à air (3), est disposé au moins un élément de retenue (29, 29') rétrécissant la section transversale libre du canal à air (3), qui s'étend de préférence sur toute la largeur du canal à air (3).
  18. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la hauteur maximale du canal à air (3) dans la région du au moins un élément de retenue (29, 29') vaut environ de 0,6 fois à 0,8 fois la hauteur moyenne de la partie du canal à air (3) située après l'élément de retenue (29, 29').
  19. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que plusieurs rainures longitudinales (31) orientées sensiblement dans le sens de l'écoulement sont ménagées dans au moins une paroi du canal à air (3) (paroi de canal (23, 25)).
  20. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que les rainures longitudinales (31) présentent un contour rectangulaire, de préférence à arêtes vives.
  21. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que les rainures longitudinales (31) sont disposées dans la région de l'ouverture d'aspiration (13) du canal à air (3) et/ou de l'élément de retenue (29; 29').
  22. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que le canal à air (3), qui présente - vu en plan - un tracé courbe, de préférence en forme de S, présente un étranglement qui - vu dans le sens de l'écoulement - est disposé sensiblement au milieu du canal à air (3).
  23. Dispositif de transfert suivant la revendication 22, caractérisé en ce que l'aire de la section transversale du canal à air (3) à son point le plus étroit est plus petite que la moitié de l'aire de la section transversale du tuyau d'aspiration (33).
  24. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que le canal à air (3) - vu dans le sens de l'écoulement - présente une zone d'évasement (53) dans la région située avant son ouverture de sortie (35).
  25. Dispositif de transfert suivant l'une quelconque des revendications précédentes, caractérisé en ce que la tête de réception (1) comprend plusieurs éléments articulés les uns aux autres (A à K;... L), dans lequel l'élément de retenue (29, 29'), les rainures longitudinales (31), la zone d'évasement (53) et/ou la première partie conique (21) du canal à air (3) sont disposés sur des éléments différents ou sont répartis sur plusieurs éléments.
EP99950781A 1998-12-09 1999-10-27 Dispositif de transfert Expired - Lifetime EP1137846B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856745 1998-12-09
DE19856745A DE19856745A1 (de) 1998-12-09 1998-12-09 Überführungsvorrichtung
PCT/EP1999/008108 WO2000034577A1 (fr) 1998-12-09 1999-10-27 Dispositif de transfert

Publications (2)

Publication Number Publication Date
EP1137846A1 EP1137846A1 (fr) 2001-10-04
EP1137846B1 true EP1137846B1 (fr) 2003-06-18

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EP99950781A Expired - Lifetime EP1137846B1 (fr) 1998-12-09 1999-10-27 Dispositif de transfert

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EP (1) EP1137846B1 (fr)
AT (1) ATE243280T1 (fr)
DE (2) DE19856745A1 (fr)
WO (1) WO2000034577A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN102179994B (zh) * 2011-02-28 2012-10-03 广东东方精工科技股份有限公司 伺服驱动纸箱印刷机构
US8968519B2 (en) 2013-03-14 2015-03-03 Georgia-Pacific Consumer Products Lp Sheet edge trimming and removal from a structured paper fabric
CN110396859B (zh) * 2019-06-05 2020-11-03 湖北长江汇丰纸业有限公司 一种生产特种纸用的吹气引纸装置

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Publication number Priority date Publication date Assignee Title
US3705676A (en) * 1970-03-16 1972-12-12 Overly Inc Air foil conveyor
US3743197A (en) * 1971-08-16 1973-07-03 Du Pont Method of and apparatus for handling material
US4708275A (en) * 1986-07-23 1987-11-24 Westvaco Corporation Trim receiver
DE3933861A1 (de) * 1989-10-11 1991-04-18 Jagenberg Ag Verfahren und vorrichtung zum einfuehren einer materialbahn in eine verarbeitungsmaschine
DE19724123A1 (de) * 1997-06-09 1998-12-10 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zum Überführen eines Einfädelstreifens oder einer Materialbahn
FI103425B1 (fi) * 1997-11-14 1999-06-30 Valmet Corp Päänvientilaitteisto ja menetelmä rainan pään viemiseksi

Also Published As

Publication number Publication date
DE59906042D1 (de) 2003-07-24
WO2000034577A1 (fr) 2000-06-15
ATE243280T1 (de) 2003-07-15
DE19856745A1 (de) 2000-06-15
EP1137846A1 (fr) 2001-10-04

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