EP0960977A2 - Bande sans fin - Google Patents

Bande sans fin Download PDF

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Publication number
EP0960977A2
EP0960977A2 EP99101932A EP99101932A EP0960977A2 EP 0960977 A2 EP0960977 A2 EP 0960977A2 EP 99101932 A EP99101932 A EP 99101932A EP 99101932 A EP99101932 A EP 99101932A EP 0960977 A2 EP0960977 A2 EP 0960977A2
Authority
EP
European Patent Office
Prior art keywords
knobs
band according
belt
grooves
contact surfaces
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.)
Granted
Application number
EP99101932A
Other languages
German (de)
English (en)
Other versions
EP0960977B1 (fr
EP0960977A3 (fr
Inventor
Joachim Dr. Grabscheid
Volker Schmidt-Rohr
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
Voith Sulzer Papiertechnik 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, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0960977A2 publication Critical patent/EP0960977A2/fr
Publication of EP0960977A3 publication Critical patent/EP0960977A3/fr
Application granted granted Critical
Publication of EP0960977B1 publication Critical patent/EP0960977B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/029—Wet presses using special water-receiving belts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to an endless belt for use in the drainage area, especially in the forming area of a machine for production a fibrous web such as in particular a paper, cardboard, tissue and / or nonwoven web.
  • a twin wire zone of a former known from DE 44 20 801 C2 is a sieve supported by a band that is permeable to water or can be impermeable to water.
  • the use of a waterproof Tape has the particular disadvantage that paper quality is disturbed by an introduced air boundary layer and in addition, double-sided drainage is not possible. If the tape is permeable to water, e.g. drilled, so is a drainage through this Band through possible. Especially in the initial drainage area, in which large amounts of water occur, there is a risk of Path markings due to very high flow speeds.
  • a press of a paper machine known from DE 44 11 621 A1 comprises a press belt, of which the one to be pressed is formed in the forming area Paper web is separated by a press felt, which is part of the Press water absorbs. The rest of the press water is in the Grooves of the press belt saved.
  • the proportion of grooves in the Total surface area of the belt should be as small as possible to ensure adequate to obtain a large support surface which is necessary for low belt wear.
  • Such a tape design is for raw pressures and small ones Drainage rates suitable. Larger drainage flows, as in Formation area occur, can not be overcome. The bare Increasing the strip thickness to increase the water absorption capacity would result in a tape with too high bending stiffness. One about the Wide, uniform drainage as required in the forming area would not be possible.
  • a wire section described in DE-A-196 34 349 is on the of the side of a screen belt facing away from the suspension, one running around it or transversely extending profile tape provided with a Provide a variety of holes, holes or slots and thus is more or less open.
  • the profile tape can also be a rough, ribbed one or otherwise profiled outer surface facing the sieve belt have, in which case it can be impermeable.
  • the aim of the invention is to provide an endless belt of the type mentioned to create that allows both bilateral drainage in the former, without losing the quality of the fibrous web as a result of a marking affected by high drainage rates, as well as the setting optimal drainage conditions over the width allowed.
  • the object is achieved according to the invention in that it is at least essentially closed on one side and open on the opposite side, that its water storage volume is at least 5 l / m 2 and in particular in a range from about 5 to about 25 l / m 2 , preferably in a range from about 10 to about 18 l / m 2 , and that its mean bending stiffness in the circumferential direction and its mean bending stiffness in the transverse direction, based on a width of 1 m, each have a value which is less than or equal to 10 Nm 2 is.
  • the average bending stiffness in the circumferential direction can be equal to the average Flexural rigidity in the transverse direction.
  • the bending stiffness in the circumferential direction and the bending stiffness in the transverse direction can, however also differentiate from each other.
  • the tape can in particular have grooves on its open side be. At least some of the grooves can generally extend in the circumferential direction and / or at least part of the grooves generally in the transverse direction extend. According to a preferred practical embodiment of the tape according to the invention are both general in the circumferential direction extending grooves as well as generally extending transversely Grooves provided. Basically, the grooves can also be spiral run.
  • Band has at least a part of the grooves a depth that in one Range from about 5 to about 25 mm and especially in one range from about 12 to about 20 mm, around the necessary storage volume to provide.
  • the band can also be a variety possess of knobs or formed by a plurality of such knobs be what the advantage of a lower bending stiffness in the circumferential and transverse directions with a high storage volume brings.
  • these can generally be in the circumferential direction and arranged in generally transverse rows be.
  • it is also a spiral arrangement of the knobs possible.
  • the drainage sieve in question is then moved in with it Contacting contact surface of the knobs worn.
  • Belt is the outer one that can be brought into contact with a sieve belt
  • Total contact area of the knobs is less than or equal to 50% of the total surface of the tape, particularly in a range of about 15 to 30% and preferably in a range from about 20 to about 25 % of the total surface of the belt lies.
  • the individual contact surfaces of the knobs expediently have no direction greater than about 6 mm.
  • the maximal Extension of the individual contact surfaces of the knobs is thus one Limited value that is mine or equal to 6 mm.
  • the individual contact surfaces of the knobs can be, for example, a round, have a square or rectangular shape, the contact surfaces of the different knobs may be the same or different can.
  • the band has a compressibility of around 100 up to 2000 kPa.
  • the band expediently has a reinforcement Base on which the knobs are arranged.
  • the gain Reinforcing threads include, preferably in the circumferential direction and run in the transverse direction and in the base in a polyurethane, for example or a combination of polyurethane and other materials comprehensive matrix are embedded.
  • the base has a thickness ranging from about 0.5 to 8 mm, preferably is about 4 mm thick.
  • the sieve thickness is preferably about 0.7 mm.
  • knobs each have an inner gas, preferably Air cushions included.
  • This gas cushion can in particular laterally and / or be ventilated towards the inside of the jacket.
  • the contact surfaces can be used to improve the load-bearing function of the belt the knobs may be at least partially formed by spikes that are in the Knobs are embedded. Through an appropriate design and a Targeted material selection of the spikes can be the band wear and the Reduce marking tendency.
  • the spikes are expediently at least in the region of the contact area slotted, whereby the contact surface carrying the relevant screen is further reduced.
  • Such a slotted design is special then advantageous if the individual contact surfaces of the knobs in none Direction have a greater extent than about 2 mm.
  • FIGs 1 and 2 is a first in a purely schematic representation Embodiment of an endless belt 10 shown in the drainage area, especially in the forming area, a machine for manufacturing a fibrous web can be used.
  • the fibrous web can be for example a paper, cardboard, tissue and / or Trade nonwoven web.
  • the band 10 has an at least substantially closed inner side 12 and an open outer side 14, which in the present case is provided with, in particular, spiral grooves 16.
  • the open outside 14 can in particular also have a multiplicity of knobs 20 (cf. FIGS. 2 to 15).
  • the band 10 comprises a base 18, preferably provided with a reinforcement 26 (cf. also FIGS. 3, 10 and 11), on which the ribs 22 or the knobs 20 provided between the grooves 16 are arranged.
  • the rib width is denoted by d S and the groove width by d R.
  • the depth or height of the base 18 is indicated by h B and the height or depth of the ribs 22 by h R.
  • knobs 20 can also be provided instead of the continuous ribs 22 delimiting the grooves 16.
  • the nub height is denoted by h N in FIG.
  • the water storage volume of the open side 14 of the endless belt 10 is at least 5 l / m 2 . It is in particular in a range from about 5 to about 25 l / m 2 and preferably in a range from about 10 to about 18 l / m 2 .
  • the endless belt 10 provided with grooves 16 and / or knobs 20 is also designed so that its mean bending stiffness in the circumferential direction and its mean bending stiffness in the transverse direction each have a value relative to a width of 1 m which is mine or equal to 10 Nm 2 .
  • the bending stiffness is defined by the product E ⁇ l, in which the elastic modulus [N / mm 2 ] and “l” indicate the axial moment of inertia [m 4 ].
  • the bending stiffness in the circumferential and transverse directions can be the same or different.
  • the grooves 16 or the knobs 20 have a depth that is in one area from about 5 to about 25 mm and especially in a range of about 12 to about 20 mm.
  • the knobs 20 can, for example, generally in the circumferential direction and arranged in generally transverse rows be (see, for example, Figures 3 and 8). Basically you can the knobs 20 can also be arranged spirally.
  • the one Screen belt that can be brought into contact with outer contact surface 24 (cf. FIGS. 4 to 15) the knob 20 is less than or equal to 50% of the total surface of the band 10, in particular in a range of about 15 to about 30%, and preferably in a range of about 20 to is about 25% of the total surface of the belt 10.
  • the individual contact surfaces 24 expediently have the knobs 20 in no direction greater than about 6 mm, the largest extension is preferably about 2 mm.
  • the individual contact surfaces 24 of the knobs 24 can, for example, be one have a round, square or rectangular shape.
  • the base 18 of the endless belt 10 has a reinforcement 26 which for example, reinforcing threads, preferably in the circumferential direction and run in the transverse direction and in the base 18 in one, for example Polyurethane or a combination of polyurethane and others Materials comprising matrix are embedded.
  • a reinforcement 26 which for example, reinforcing threads, preferably in the circumferential direction and run in the transverse direction and in the base 18 in one, for example Polyurethane or a combination of polyurethane and others Materials comprising matrix are embedded.
  • the thickness of the base is again indicated by h B and, as already mentioned, the nub height by h N.
  • the total thickness of the strip 10 is therefore equal to h N + h B.
  • Figure 4 shows an embodiment of a knob 20, the contact surface 24 is square, but can also be rectangular, for example. In principle, however, a round shape, for example, is also possible (see FIGS. 10 to 15).
  • the largest dimension k is expedient Mine or equal to 6 mm and is preferably about 2 mm.
  • the knobs 20 can e.g. from an oversize base 18 be produced by machining this base 18.
  • the base 18 expediently has a thickness h B in a range from approximately 0.5 to approximately 8 mm, this thickness h B preferably being approximately 4 mm.
  • the knobs 20 each contain an inner gas cushion 28, which is, for example is an air cushion.
  • FIG. 6 is more schematic Representation of a knob 20 with a laterally ventilated gas cushion 28 shown.
  • the ventilation here takes place through side openings 30.
  • FIG. 7 again shows a schematic illustration of a Inside of hinge 12 ventilated knobs 20. The ventilation takes place here via at least one inner opening 32.
  • the contact surfaces 24 of the knobs 20 can be formed by spikes 34 be embedded in the knobs 20.
  • the knobs shown in Figures 9 and 14 are each with a provided in cross section generally T-shaped spike 34, the outer flat section forms the contact surface 24. While at the Embodiment according to Figure 9, the outer portion of the spike 34 as a whole is level and flush with the outer edge of the tapered exterior of the knob 20 is in the embodiment 14, the edge of this outer region of the spike 34 over the led edge of the knob 20 inwards. In contrast, 10 and 11, the outer area of the spike 34 each formed like a pin.
  • the knobs 20 have a cross-section tapering towards the outside.
  • the outer diameter the outer pin-like portion of the spike 34 about the same size as that smallest outer diameter of the conically tapered knob 20.
  • the outer diameter of the corresponding pin-like outer Portion of the spike 34 shown in FIG. 11 is smaller than that smallest outer diameter of the relevant knob 20.
  • the outwardly projecting spike portion of the embodiment 13 has a smaller diameter than that shown in FIG Embodiment.
  • the spikes are 34 expediently each with enlarged embedded in the knobs 20 Retaining sections 36 provided.
  • a slotted spike 34 is provided.
  • the spike 34 is provided with a cross slot 38.
  • the spike 34 has a round cross section.
  • a slotted one In principle, however, spikes can also be executed Cross section such as rectangular or square cross section be provided.
  • FIGS. 16 and 17 show two application examples for one in the previously specified manner trained endless drainage and Support band 10 shown.
  • FIG. 16 shows a partial schematic representation of one Forming area of a paper machine, in which the endless belt 10 with its closed inside 12 is guided over support strips 40 and an inner screen 42 coming into contact with its open outer side 14 supports.
  • the inner screen 14 lies on the contact surfaces 24 of the Pimples 20.
  • the fiber suspension 44 is between the inner sieve 42 and an outer sieve 46.
  • the outer sieve 46 can of at least a forming strip 48 can be acted upon.
  • a forming area shown in FIG. 17 is from a headbox 50 fiber suspension 44 in the Introduced inlet gap between an outer sieve 46 and an inner sieve 42, which is supported by a continuous endless belt 10, the in the manner shown via a plurality of inner rolling support elements 52 is led.
  • the support area there are 46 formation strips on the outer sieve 54 can be pressed on, continuously trained or sectioned could be.
  • the endless belt 10 serves both as Support belt for the inner sieve 42 as well as a drainage belt.

Landscapes

  • Paper (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Belt Conveyors (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Liquid Crystal (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
EP99101932A 1998-05-28 1999-01-29 Bande sans fin Expired - Lifetime EP0960977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823948A DE19823948A1 (de) 1998-05-28 1998-05-28 Endloses Band
DE19823948 1998-05-28

Publications (3)

Publication Number Publication Date
EP0960977A2 true EP0960977A2 (fr) 1999-12-01
EP0960977A3 EP0960977A3 (fr) 2000-08-30
EP0960977B1 EP0960977B1 (fr) 2003-12-03

Family

ID=7869230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101932A Expired - Lifetime EP0960977B1 (fr) 1998-05-28 1999-01-29 Bande sans fin

Country Status (6)

Country Link
US (1) US6173831B1 (fr)
EP (1) EP0960977B1 (fr)
JP (1) JPH11350370A (fr)
AT (1) ATE255656T1 (fr)
CA (1) CA2272727A1 (fr)
DE (2) DE19823948A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116820A2 (fr) * 1999-11-30 2001-07-18 Voith Paper Patent GmbH Procédé pour la fabrication d'une bande de formation
EP1116817A3 (fr) * 1999-11-30 2001-11-07 Voith Paper Patent GmbH Procédé pour la fabrication d'une bande d'essorage
WO2002070818A1 (fr) * 2001-02-27 2002-09-12 Voith Paper Patent Gmbh Procede et dispositif servant a produire des courants transversaux dans un systeme de fabrication de feuilles

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028831A1 (de) * 1999-06-22 2001-01-04 Norddeutsche Seekabelwerk Gmbh Riemen, insbesondere Förderriemen und Verfahren zur Herstellung desselben
MXPA01000059A (es) * 2000-01-21 2002-08-06 Stahlecker Fritz Banda transportadora para transportar un haz de fibras a ser condensadas.
US7014733B2 (en) 2002-05-14 2006-03-21 Stowe Woodward L.L.C. Belt for shoe press and shoe calender and method for forming same
US7449079B2 (en) * 2003-01-31 2008-11-11 Fenner, U.S., Inc. Link belt assembly and method for producing same
US7004311B2 (en) * 2003-01-31 2006-02-28 Fenner U.S., Inc. Non-slip conveyor and method for producing same
US7241354B2 (en) * 2003-01-31 2007-07-10 Fenner U.S., Inc. Non-slip conveyor and method for producing same
US20040149545A1 (en) * 2003-02-03 2004-08-05 Ag Harvesting Technologies, Llc Lettuce and romaine harvesting machine and method
US6896125B2 (en) * 2003-04-04 2005-05-24 Pflow Industries, Inc. Belt attachment device and method
JP2008051797A (ja) * 2006-07-28 2008-03-06 Seiko Instruments Inc 薄切片搬送装置、薄切片掬い具及び薄切片の搬送方法
WO2008109748A1 (fr) * 2007-03-06 2008-09-12 Fenner U.S., Inc. Transporteur avec fixations
US7950213B2 (en) * 2008-07-17 2011-05-31 Fenner U.S., Inc. Reinforced belt having reduced electrical resistivity and method for producing same
US7621114B1 (en) 2008-07-17 2009-11-24 Fenner U.S., Inc. Reinforced belt having reduced electrical resistivity and method for producing same
US20100126831A1 (en) * 2008-11-26 2010-05-27 Applied Materials, Inc. Self cleaning belt conveyor
US8905227B2 (en) * 2012-06-20 2014-12-09 Laitram, L.L.C. Cleanable conveyor belt and carryway
JP5873417B2 (ja) * 2012-10-30 2016-03-01 ゲイツ・ユニッタ・アジア株式会社 サクションフィーダー用タイミングベルト
US10648534B2 (en) 2016-12-02 2020-05-12 Fenner U.S., Inc. Link belt and method for producing same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411621A1 (de) * 1994-04-02 1995-10-05 Voith Sulzer Papiermasch Gmbh Preßmantel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1143931A (en) * 1913-04-02 1915-06-22 Edward O Babcock Machine for making paper-board.
US2694345A (en) * 1950-01-07 1954-11-16 Beloit Iron Works Water removal device for paper forming wire
JPS61119795A (ja) * 1984-11-15 1986-06-06 三菱重工業株式会社 ツインワイヤフオ−マ
NL8602967A (nl) * 1986-11-21 1988-06-16 Dunlop Enerka Bv Transportband.
US4922304A (en) * 1988-03-11 1990-05-01 Imagitek Reproduction machine fuser belt
DE4420801C2 (de) 1994-06-16 1997-01-30 Voith Gmbh J M Verfahren zum Betreiben einer Doppelsiebzone einer Papiermaschine zur Herstellung von Faserstoffbahnen sowie Siebzone hierzu
JP3021362B2 (ja) * 1995-09-20 2000-03-15 三ツ星ベルト株式会社 搬送用歯付ベルト
DE19634349C2 (de) * 1996-08-26 1999-04-01 Schultz Hans Joachim Dr Ing Siebpartie für eine Papiermaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411621A1 (de) * 1994-04-02 1995-10-05 Voith Sulzer Papiermasch Gmbh Preßmantel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116820A2 (fr) * 1999-11-30 2001-07-18 Voith Paper Patent GmbH Procédé pour la fabrication d'une bande de formation
EP1116820A3 (fr) * 1999-11-30 2001-11-07 Voith Paper Patent GmbH Procédé pour la fabrication d'une bande de formation
EP1116817A3 (fr) * 1999-11-30 2001-11-07 Voith Paper Patent GmbH Procédé pour la fabrication d'une bande d'essorage
WO2002070818A1 (fr) * 2001-02-27 2002-09-12 Voith Paper Patent Gmbh Procede et dispositif servant a produire des courants transversaux dans un systeme de fabrication de feuilles

Also Published As

Publication number Publication date
EP0960977B1 (fr) 2003-12-03
EP0960977A3 (fr) 2000-08-30
JPH11350370A (ja) 1999-12-21
CA2272727A1 (fr) 1999-11-28
ATE255656T1 (de) 2003-12-15
DE19823948A1 (de) 1999-12-02
US6173831B1 (en) 2001-01-16
DE59907912D1 (de) 2004-01-15

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