WO1993000473A1 - Feuille metallique pour la toile sans fin d'une machine a papier - Google Patents

Feuille metallique pour la toile sans fin d'une machine a papier Download PDF

Info

Publication number
WO1993000473A1
WO1993000473A1 PCT/SE1992/000437 SE9200437W WO9300473A1 WO 1993000473 A1 WO1993000473 A1 WO 1993000473A1 SE 9200437 W SE9200437 W SE 9200437W WO 9300473 A1 WO9300473 A1 WO 9300473A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
dewatering
rail
foil
supporting structure
Prior art date
Application number
PCT/SE1992/000437
Other languages
English (en)
Inventor
Sven-Erik SJÖDIN
Original Assignee
Sjoedin Sven Erik
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 Sjoedin Sven Erik filed Critical Sjoedin Sven Erik
Priority to EP92913401A priority Critical patent/EP0636193A1/fr
Priority to JP5501181A priority patent/JPH06511520A/ja
Publication of WO1993000473A1 publication Critical patent/WO1993000473A1/fr
Priority to FI935600A priority patent/FI935600A/fi
Priority to NO934665A priority patent/NO934665L/no

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars

Definitions

  • a foil for the wire section in a paper making machine is a foil for the wire section in a paper making machine.
  • the present invention relates to a dewatering rail, a so called foil, for the wire section in a paper making machine, said rail being intended to be applied transversely to the running direction of the wire with its upper surface in contact with the underside of the upper portion of the wire, said upper surface having a corrosion resistive, e.g. ceramic, layer on a bed of stainless steel or the like.
  • a corrosion resistive e.g. ceramic
  • Such a foil also called register rail, is usually shaped with a somewhat convex upper surface such that during the dewatering of the pulp transported on the wire a negative pressure is formed in a wedge shaped space between the upper surface and the wire.
  • Foils consisting entirely of plastic rails having a service life of approximately two weeks and costing approximately 20.000 crowns per foil.
  • foils of stainless steel rails having a ceramic layer on their upper surface cost approximately 45000 crowns and have a service life of approximately two years.
  • All-ceramic foils costing approximately 90000 crowns. Their service life is restricted by the fact that they have a tendency to crack, but it exceeds that of the foils according to paragraph 2.
  • the object of the invention has been to provide a foil of the kind defined by way of introduction, which has a service life of a couple of years, such as for the rail according to paragraph 2 above, but against considerably lower costs.
  • this object has turned out to be attainable, surprisingly enough, by the fact that the bed of stainless steel or similar is a thin plate supported by a longitudinal rigid supporting structure forming part of the foil.
  • the supporting structure can be a plastic rail to which the plate is attached.
  • Figure 1 in a transverse section illustrates a first embodiment of a foil " according to the invention
  • Figure 2 in a similar transverse section illustrates a second embodiment
  • a dewatering rail generally designated 2, a so called foil, for the wire section in a paper making machine.
  • the foil is applied transversely to the running direction, indicted by an arrow 6, of the upper wire section, designated 4. More particularly, the foil 2 is carried by a portion 8 of the frame, not further shown, of the wire section, attached in a conventional way to the portion 8 by means of a dovetail connection indicated at 10.
  • An upper surface layer 12 on the foil 2 is then in contact with the underside of the wire section 4.
  • the layer 12, in a way likewise conventional, is a corrosion resistive, e.g. ceramic layer on a bed of stainless steel or similar, the design of which is described more in detail below.
  • this bed is a thin plate 14 supported by a longitudinal rigid supporting structure 16 forming part of the foil 2.
  • the supporting structure 16 is a plastic rail, the thickness of which is great as compared with that of the bed plate 14.
  • the thickness of the plate 14 can be e.g. 3 mm and that of the plastic rail 16 can be e.g. 25 mm.
  • the plate 14 is recessed in a correspondingly shaped recess in the upper side of the plastic rail 16, whereas in the embodiment according to Figure 2 the plate 14 is supported along its longitudinal edges by the plastic rail 16. More particularly, in the last- mentioned case, the longitudinal edges of the plate 14 are bent inwardly under the plate for forming supporting edge portions 18 and 20, respectively, the upper side of the plate 14 being simultaneously bent to a desired shape known per se.
  • the plate 12 ( Figure 1) and its edge portions 18, 20 ( Figure 2), respectively, are attached to the plastic rail 16 by means of screwed joints.
  • the screwed joints include nuts 22, which are welded onto the underside of and along the plate 12 between its edges ( Figure 1) , and on the underside of and along the edge portions 18, 20 ( Figure 2) , respectively. Screws 24 cooperating with the nuts 22 extend through through holes 26 in the plastic rail 16.
  • the nuts 24 are located in recesses 28 in the upper side of the plastic rail 16 and the heads 30 of the screws 24 in a similar way are located in recesses 32 in the underside of the plastic rail 16.
  • other embodiments of the supporting structure shown in the Figures as a plastic rail 16 are conceivable. Essential is to use the basic idea of the invention to make the design of the supporting structure as cheap as possible. This can e.g.
  • the plastic rail 16 is replaced by a plate bent with folded over longitudinal edges in a similar way as the plate 14, the contours of which for the rest e.g. can follow the contours of the underside and the edge portions of the plastic rail 16 in Figure 2.
  • the plate 14 and the supporting structure plate, thus shaped, can then be attached together with their bent over longitudinal edges abutting each other.

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  • Paper (AREA)

Abstract

L'invention se rapporte à un rail d'égouttage, se présentant sous forme d'une feuille métallique (2), s'utilisant pour la toile sans fin d'une machine à papier. Plus particulièrement, ledit rail est conçu pour se placer transversalement au sens de déplacement (6) de la toile sans fin (4), sa surface supérieure étant en contact avec la face inférieure de la partie supérieure de la toile sans fin; ladite surface supérieure possède une couche résistant à la corrosion (12), par exemple, en céramique, située sur une base (14) en acier inoxydable ou similaire. La base est une plaque mince (14) supportée par une structure longitudinale rigide (16), faisant partie de la feuille métallique.
PCT/SE1992/000437 1991-06-20 1992-06-17 Feuille metallique pour la toile sans fin d'une machine a papier WO1993000473A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92913401A EP0636193A1 (fr) 1991-06-20 1992-06-17 Feuille metallique pour la toile sans fin d'une machine a papier
JP5501181A JPH06511520A (ja) 1991-06-20 1992-06-17 抄紙機のすき網部用フォイル
FI935600A FI935600A (fi) 1991-06-20 1993-12-14 Foil foer virapartiet vid en pappersmaskin
NO934665A NO934665L (no) 1991-06-20 1993-12-17 Folie for virepartiet i papirmaskiner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101906-7 1991-06-20
SE9101906A SE470100B (sv) 1991-06-20 1991-06-20 Avvattningslist för virapartiet vid en pappersmaskin

Publications (1)

Publication Number Publication Date
WO1993000473A1 true WO1993000473A1 (fr) 1993-01-07

Family

ID=20383105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000437 WO1993000473A1 (fr) 1991-06-20 1992-06-17 Feuille metallique pour la toile sans fin d'une machine a papier

Country Status (7)

Country Link
EP (1) EP0636193A1 (fr)
JP (1) JPH06511520A (fr)
CA (1) CA2111102A1 (fr)
FI (1) FI935600A (fr)
NO (1) NO934665L (fr)
SE (1) SE470100B (fr)
WO (1) WO1993000473A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005370A1 (fr) * 1994-08-17 1996-02-22 Valmet Corporation Element d'elimination de l'eau pour machine a papier, et son procede de fabrication
DE10057553A1 (de) * 2000-11-21 2002-05-23 Voith Paper Patent Gmbh Verfahren und Anordnung zur Befestigung von mindestens einem mit einem Verschleißkörper versehenen Formkörper auf einem Trägerkörper
DE10130323A1 (de) * 2001-06-22 2003-01-02 Voith Paper Patent Gmbh Verschleisskörper in Schichtverbundbauweise, insbesondere in einer Papier- oder Kartonmaschine, Verfahren zu seiner Herstellung und seine Verwendung
WO2008152192A1 (fr) * 2007-06-12 2008-12-18 Metso Paper, Inc. Élément d'essorage d'une machine de formation de bande, procédé de fabrication d'un élément d'essorage utilisé dans une machine de formation de bande et partie superficielle d'un élément d'essorage dans une machine de formation de bande

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140225A (en) * 1962-11-29 1964-07-07 Dominion Eng Works Ltd Adjustable drainage foil for paper machines
US3520775A (en) * 1969-07-16 1970-07-14 Leslie Truxa Foil structure for papermaking machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140225A (en) * 1962-11-29 1964-07-07 Dominion Eng Works Ltd Adjustable drainage foil for paper machines
US3520775A (en) * 1969-07-16 1970-07-14 Leslie Truxa Foil structure for papermaking machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005370A1 (fr) * 1994-08-17 1996-02-22 Valmet Corporation Element d'elimination de l'eau pour machine a papier, et son procede de fabrication
DE10057553A1 (de) * 2000-11-21 2002-05-23 Voith Paper Patent Gmbh Verfahren und Anordnung zur Befestigung von mindestens einem mit einem Verschleißkörper versehenen Formkörper auf einem Trägerkörper
US6746576B2 (en) 2000-11-21 2004-06-08 Voith Paper Patent Gmbh Method and arrangement for attaching at least one shaped part together with a wear part onto a support piece
DE10130323A1 (de) * 2001-06-22 2003-01-02 Voith Paper Patent Gmbh Verschleisskörper in Schichtverbundbauweise, insbesondere in einer Papier- oder Kartonmaschine, Verfahren zu seiner Herstellung und seine Verwendung
WO2008152192A1 (fr) * 2007-06-12 2008-12-18 Metso Paper, Inc. Élément d'essorage d'une machine de formation de bande, procédé de fabrication d'un élément d'essorage utilisé dans une machine de formation de bande et partie superficielle d'un élément d'essorage dans une machine de formation de bande

Also Published As

Publication number Publication date
NO934665D0 (no) 1993-12-17
FI935600A0 (fi) 1993-12-14
SE470100B (sv) 1993-11-08
EP0636193A1 (fr) 1995-02-01
SE9101906L (sv) 1992-12-21
JPH06511520A (ja) 1994-12-22
FI935600A (fi) 1993-12-14
CA2111102A1 (fr) 1993-01-07
SE9101906D0 (sv) 1991-06-20
NO934665L (no) 1993-12-17

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