EP1375739A2 - Machine pour la fabrication d'une bande fibreuse - Google Patents

Machine pour la fabrication d'une bande fibreuse Download PDF

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Publication number
EP1375739A2
EP1375739A2 EP03101509A EP03101509A EP1375739A2 EP 1375739 A2 EP1375739 A2 EP 1375739A2 EP 03101509 A EP03101509 A EP 03101509A EP 03101509 A EP03101509 A EP 03101509A EP 1375739 A2 EP1375739 A2 EP 1375739A2
Authority
EP
European Patent Office
Prior art keywords
press
web
machine according
roller
felt
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Withdrawn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
EP03101509A
Other languages
German (de)
English (en)
Other versions
EP1375739A3 (fr
Inventor
Andreas Meschenmoser
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 EP1375739A2 publication Critical patent/EP1375739A2/fr
Publication of EP1375739A3 publication Critical patent/EP1375739A3/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Withdrawn legal-status Critical Current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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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
    • D21F3/04—Arrangements thereof

Definitions

  • the present invention relates to a machine for producing a Fibrous web, in particular paper or cardboard web, with a wire section, a dryer section and an intermediate press section with a first press in the direction of web travel with two between them first press nip forming press elements, in particular rollers, one in the web running direction second press with a second one between them Press nip forming press elements, in particular rollers, and a Web removal element for removing the fibrous web from the wire of the Wire section.
  • Such machines are particularly general as paper machines known.
  • the one coming from the wire section is in the press section Paper web drained.
  • the invention has for its object a machine of the beginning specified type with improved properties.
  • a compact and inexpensive press concept is proposed become.
  • Other tasks are simplified and improved performance a web, avoiding unwanted differences in the Surface properties on both sides of the web as well as avoidance a web waste from the felt, especially for webs with high Grammage.
  • a press element of the first press as a combined one Press and web take-off element can be a separate web take-off element to remove the fibrous web from the wire of the wire section be saved.
  • a pick-up roller is used for this, which is placed in front of the first press and thus the total length the press section enlarged.
  • the invention can thus also Length of the press section can be reduced. Plus the cost less than known machines.
  • One press element of the first press thus has a double function: on the one hand, it serves to remove the web from the wire of the wire section and on the other hand forms it together with the second pressing element of the first Press the first press nip. This is both space saving as well less expensive than the usual use of a separate pick-up roller.
  • the combined press and web removal element is preferred as Press suction element, in particular press suction roll, whose suction area includes the place of web acceptance from the screen. About the in Press suction element generated negative pressure can safely remove the Web from the screen can be guaranteed.
  • the pressing elements of the first press are preferably each with one the fibrous web is wrapped in press felt running through the first press nip. Such double felting of the first press leads to one particularly good drainage of the web.
  • the press felt wrapping around the combined press and take-off element is preferred as the upper felt and the other pressing element first press wrapping press felt formed as a bottom felt.
  • the Web guiding takes place after the first press nip, what has proven to be advantageous.
  • the suction area of the press and web removal element preferably comprises also the press nip and extends to the tangent of the combined Press and web take-up element wrapped in felt after the first Press nip. This enables web separation behind the first press nip guaranteed by the press felt of the second press element of the first press become.
  • the suction area includes the web take-off point to the tangent of the felt after the press nip enough. This means that a safe, negative pressure can be applied to a closed supply Supported web maintenance from the screen to the first press nip can be achieved.
  • the suction area can also be divided into two or more suction zones. Then, according to a further preferred embodiment, it is possible to To apply suction zones with different vacuum to each other.
  • the second press can also be used as a so-called shoe press a roller having a press shoe with a flexible roller jacket and a counter roll with a rigid roll shell. about Such shoe presses can drain the web in a known manner Way be optimized.
  • the second press can also be used as a normal press Roll without extended press nip or as deflection-controlled Roll to be formed with a cylindrical roll shell.
  • the two press elements of the second press are also preferred one each with the fibrous web through the second press nip running band wrapped. Both press elements from each be wrapped in a press felt. But it can also be a pressing element from a press felt and the other press element from one Transfer ribbon be wrapped.
  • the use of a transfer belt enables the web separation after the second press advantageously in the desired one Wise. Wrapping with two press felts leads to one particularly good drainage.
  • the press felt is preferably used as a bottom felt educated. This arrangement results in good web guidance and allows drainage down the second press.
  • the counter roll is preferably the upper roller wrapped in the transfer belt. This too has proven to be beneficial for good drainage and web management exposed.
  • the bottom felt wraps around the second press also a web take-off roller, especially one Suction roller through which the web coming from the first press can be removed. So that a good web acceptance and Transfer of the web to the second press can be achieved, whereby a separate felt is saved.
  • the web take-off roller is in particular on the top felt of the first press. This can create a closed Web guidance can be guaranteed.
  • a third press is arranged behind the second press, which in particular as an offset press with an upper and a lower roller is formed.
  • the second press which in particular as an offset press with an upper and a lower roller is formed.
  • the third press can advantageously the two-sidedness of the web, ie the ratio of the Properties of both sides of the web can be set.
  • the third press can be used to discharge the web into the press pulper Serve in case of a web performance.
  • the lower one in particular is for this Third press roll formed with a hard roll shell. This allows an advantageous web discharge within the press section can be achieved.
  • a separate roller for web removal be saved.
  • the upper roller of the offset press preferably has a smaller diameter than the counter roll of the shoe press. It is also preferred a loop around the upper roller of the offset press in front of the press nip intended. This can advantageously be a certain train on the Web are generated to achieve a desired stretch of the web.
  • the upper roller is the offset press of which wraps around the upper press element of the second press Band with wrapped.
  • the tape can run out advantageously by a behind the upper roller of the offset press provided, adjustable guide roller can be adjusted.
  • the upper roller of the second press looping transfer belt only has internal guide rollers and is preferably scraped.
  • the transfer ribbon is drawn in shortened guide rollers used in the invention in the cantileverten Area can be filed. So that a simple retraction of the Transfer ribbon can be realized.
  • the water is drained off on the first and / or on the second press especially down. This also leads to constructive Benefits.
  • the end of the wire section 1 comprises two rollers 4, 5 in order which the sieve 7 carrying the paper web 6 is guided.
  • the web running direction is marked with arrow I.
  • the two rollers 4, 5 are arranged such that an inclined web take-off area 8 is created, in which the paper web 6 is removed from the wire 7 can be.
  • the press section 3 comprises a first press 9 and a second press 10 as well as a third press, designed as an offset press 11.
  • the first press 9 comprises a combined press suction roll 12 and a counter roll 13, which form a first press nip 14 between them.
  • the roller 12 is by an endless top felt 15, the counter roller 13 by an endless Bottom felt 16, each together with the material web 6 run through the first press nip 14. Through this double felting good drainage can be achieved at the first press nip 14.
  • the combined press suction roll 12 has a suction area 17 which each including the web take-off area 8 on the wire 7 of the wire section 1 to the tangent of the upper felt 15 after the first press nip 14 of the first press 1 is enough. Vacuuming the roller 12 can create a vacuum supported, closed removal of the paper web 6 from the screen 7 and a web maintenance until after the first press nip 14 can be achieved.
  • the second press 10 is designed as a shoe press with one Press shoe 18 having roller 19 with flexible roller jacket 20 and a counter roller 21 with a rigid roller jacket 22.
  • the shoe roller 19 is wrapped by an endless press felt 23, the counter roller 21 by an endless transfer belt 24, both together with the Material web 6 through that formed between the two rollers 19 and 21 run second press nip 25.
  • the press felt serves a good one again Drainage of the paper web 6 while the transfer belt 24 to Web separation and continuation after the second press nip 25 is used.
  • the press felt 23 wrapping around the shoe press 19 wraps around at the same time a further roller 26, which is designed as a vacuumed pick-up roller.
  • the Roller 26 lies with its outer surface on the upper felt 15 of the first press 9 and serves to remove the web coming from the first press nip 14 Paper web 6.
  • the transfer belt wrapping around the counter roller 21 of the shoe press 10 24 also wraps around the upper roller 27 of the offset press third press 11.
  • the guide roller 28 arranged behind is such adjustable that the transfer ribbon outlet after the offset press 11 is adjustable in the desired manner.
  • the upper roller 27 of the Offset press 11 forms a third press nip with a lower roller 29 37th
  • the lower roller 29 of the offset press 11 has a hard outer surface 30 trained to ensure good web separation and web removal in to enable the press pulper, not shown here.
  • the roller 29 is furthermore with a scraper 31 and a water spray device 32 provided to improve the web performance.
  • the web 6 coming from the wire section 1 is thus in the invention Machine removed from the combined press suction roll 12 and 17 vacuum supports up to the long suction area Tangent of the felt is held after the first press nip 14. After that the web 6 is removed from the upper felt 15 of the first press 9 and up then from the pick-up roller 26, the bottom felt 23 of the second press 10 is wrapped, removed. So that the web 6 in the second Press 10 transferred and passed through the second press nip 25.
  • the web 6 is transferred via the transfer belt 24 of the second press 10 the second press nip 25 separated from the bottom felt 23 and into the offset press 11 transferred.
  • the web 6 is passed behind the offset press 11 the lower roller 29 separated from the transfer belt 24 and the dryer section or, when running the web, the press pulper, not shown here fed.
  • the continuation of the web 6 in the dryer section 2 then takes place in a manner known per se.
  • All guide rollers 38 of the transfer belt 24 are preferably inside arranged horizontally, and there are scrapers not shown here for Scraping the transfer belt 24 provided.
  • the second variant of a machine according to the invention shown in FIG. 2 largely agrees with the first variant shown in FIG. 1 match.
  • the main difference is that even in the second Press 10 both rollers 19 and 21 wrapped in a felt 23, 24 ' are, but now the offset press 11 outside the wrap is arranged. Otherwise there is also a combined press suction roll 12 in the first press 9 and an overall closed web guide intended.
  • This is also in this variant between the offset press 11 and the first roller 33 of the dryer section 2, a guide roller 34 is arranged.
  • the web is also discharged as with the first variant via the offset press 11 in those not shown here Pressenpulper.
  • the third variant shown in FIG. 3 again agrees with the variant of Fig. 2 agree in large parts.
  • the main difference is that no offset press is provided here. Instead, are with this Variant two sucked deflection rollers 35 and 36 between the second Press 10 and the first roller 33 of the dryer section 2 are arranged. Also in this variant, therefore, a closed path guidance from the Removal of the web from the wire 7 of the wire section 1 to the first roller 33 given the dryer section 2.
  • Both presses 9 and 10 are double felted.
  • a combined press suction roll 12 for web acceptance from Sieve 7 of the wire section 1 is provided, through which the web 6 negative pressure supports up to the tangent of the felt 15 after the first press nip 14 is held.
  • the fourth variant shown in FIG. 4 is again largely correct corresponds to the third variant shown in FIG. 3.
  • This one too The machine does not have an offset press, but two instead Deflection rollers 35 and 36.
  • the difference to that described above Variant essentially consists in that the upper roller 21 of the second press 10 again from a transfer belt 24 and not from one Press felt is wrapped around. Otherwise, this variant also has one Combined press suction roll 12 for web removal from the wire 7 of the wire section 1, the suction area 17 of the web 6 from the web take-off point 8 holds up to the tangent of the felt 15 after the first press nip 14. Web discharge into the press pulper can be done via the first deflection roller 35 take place. Both deflection rollers 35, 36 are otherwise as vacuumed Rollers designed to ensure good web guidance.

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  • Paper (AREA)
EP03101509A 2002-06-25 2003-05-26 Machine pour la fabrication d'une bande fibreuse Withdrawn EP1375739A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10228310 2002-06-25
DE2002128310 DE10228310A1 (de) 2002-06-25 2002-06-25 Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn

Publications (2)

Publication Number Publication Date
EP1375739A2 true EP1375739A2 (fr) 2004-01-02
EP1375739A3 EP1375739A3 (fr) 2004-06-23

Family

ID=29716641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03101509A Withdrawn EP1375739A3 (fr) 2002-06-25 2003-05-26 Machine pour la fabrication d'une bande fibreuse

Country Status (2)

Country Link
EP (1) EP1375739A3 (fr)
DE (1) DE10228310A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775377A1 (fr) * 2005-10-13 2007-04-18 Voith Patent GmbH Agencement de presse
WO2011151201A1 (fr) * 2010-06-01 2011-12-08 Voith Patent Gmbh Partie humide d'une machine destinée à fabriquer des bandes de matière fibreuse et utilisation d'une telle partie humide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729723A1 (de) * 1986-09-12 1988-03-17 Valmet Oy Geschlossene und kompakte pressenpartie einer papiermaschine
EP0287543A2 (fr) * 1987-04-14 1988-10-19 Valmet Paper Machinery Inc. Construction du bâti de la section de pressage d'une machine à papier ayant diverses zones de pressage
EP0705937A1 (fr) * 1994-10-06 1996-04-10 Valmet Corporation Section de presse dans une machine à papier comportant une presse d'égalisation
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98843C (fi) * 1995-10-03 1997-08-25 Valmet Corp Menetelmä ja laite veden poistamiseksi paperi- tai kartonkiradasta puristamalla

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729723A1 (de) * 1986-09-12 1988-03-17 Valmet Oy Geschlossene und kompakte pressenpartie einer papiermaschine
EP0287543A2 (fr) * 1987-04-14 1988-10-19 Valmet Paper Machinery Inc. Construction du bâti de la section de pressage d'une machine à papier ayant diverses zones de pressage
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
EP0705937A1 (fr) * 1994-10-06 1996-04-10 Valmet Corporation Section de presse dans une machine à papier comportant une presse d'égalisation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775377A1 (fr) * 2005-10-13 2007-04-18 Voith Patent GmbH Agencement de presse
WO2011151201A1 (fr) * 2010-06-01 2011-12-08 Voith Patent Gmbh Partie humide d'une machine destinée à fabriquer des bandes de matière fibreuse et utilisation d'une telle partie humide

Also Published As

Publication number Publication date
EP1375739A3 (fr) 2004-06-23
DE10228310A1 (de) 2004-01-22

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