EP0432448A1 - Procédé de fabrication de tamis à fentes - Google Patents

Procédé de fabrication de tamis à fentes Download PDF

Info

Publication number
EP0432448A1
EP0432448A1 EP90121239A EP90121239A EP0432448A1 EP 0432448 A1 EP0432448 A1 EP 0432448A1 EP 90121239 A EP90121239 A EP 90121239A EP 90121239 A EP90121239 A EP 90121239A EP 0432448 A1 EP0432448 A1 EP 0432448A1
Authority
EP
European Patent Office
Prior art keywords
connections
overlaps
longitudinal members
screen
covered
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
EP90121239A
Other languages
German (de)
English (en)
Other versions
EP0432448B1 (fr
Inventor
Maurus Pellhammer
Wolfgang Ehmcke
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Escher Wyss 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 Sulzer Escher Wyss GmbH, Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to AT90121239T priority Critical patent/ATE99749T1/de
Publication of EP0432448A1 publication Critical patent/EP0432448A1/fr
Application granted granted Critical
Publication of EP0432448B1 publication Critical patent/EP0432448B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/16—Cylinders and plates for screens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y10T29/49604—Filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/4962—Grille making

Definitions

  • the invention relates to a process for producing a slotted screen, which is particularly suitable for use in plants for sorting or cleaning treatment of aqueous fiber suspensions, e.g. in paper production, it is suitable in which method wire-like or rod-shaped long bodies are attached to cross bars, which limit the screen gaps.
  • Such slotted screens which are also understood to mean limited shorter slot lengths or so-called slot screens with interrupted gaps, come in different screen shapes, e.g. as cylindrical sieve baskets, flat sieves, curved sieves, half-shell sieves, drum sieves or the like.
  • slotted screens are used, among other things. used in sorters, reject sorters and so-called fractionators.
  • the sorters are used to remove the contaminants, such as impurity particles, from an aqueous fiber suspension, which in this phase of the treatment has about 0.5 to 4% fibers and about 96 to 99.5% water content, while the fractionators serve to separate two fractions with fibers of different lengths from each other and to hold the long fibers on the sieve and remove them separately.
  • Such screens are also used in reject sorters and drum screens, which work at fabric densities of up to 20%.
  • the connections between longitudinal members and cross bars are mostly produced by welding or looping around.
  • the known so-called resistance welding for example, can be used as the welding process, in which an electrical current generates the heat of fusion at the contact points.
  • other welding processes are also generally suitable.
  • the method has the disadvantage that the sieves produced in this way have undesirable burrs on their exposed surfaces and have unwanted roughness, depressions, gaps or elevations.
  • the invention is therefore based on the object to provide a method for producing slotted screens, which designs the screens on their connections in such a way that the risk of snagging and thus of flocculation and / or spinning of the fibers on the slotted screens and of blockages entirely or largely is reduced, and which can also be associated with an increase in strength at the connection points.
  • connection points on their exposed outer sides have a smooth surface Overlaps are provided. These overlaps should expediently be smoothly rounded on their outside or be shaped like a groove.
  • all media are suitable for the smooth covering of the connections, which, due to their surface tension, may have a surface smooth and rounded under certain circumstances Coverage of the connection result.
  • the material that has already melted during welding and later solidifies to form burrs can also be used for covering by partially heating and melting again after the actual welding process, e.g. under protective gas (so-called TIG arc).
  • the slotted screen produced according to the invention has the advantage that its strength at the connection point is increased (e.g. reduction in the notch effect), which is particularly important because of the alternating load occurring there during operation.
  • the choice of a material which flows at a relatively low temperature in comparison with the melting temperature of the rods and longitudinal members gives a further advantage.
  • the e.g. The relatively low temperature required for soldering poses little risk of warping the slotted screen, and the existing connections are no longer softened or melted.
  • the slotted screen shown in the drawing has longitudinal bodies 1 formed from wedge-shaped profile bars, which are connected to one another on their underside by cross bars 2 which are round in cross section and to which they are welded.
  • the welded connections 3 between the profiled bars 1 and the cross bar 2 still have irregular and uneven surfaces in the unfinished state (FIG. 2).
  • the coverings 4 made of solder or another smooth-flowing, solidifying material applied to the exposed areas of these surfaces according to the invention are shown in FIG. Due to the high surface tension of the covering material, these overlaps have a smooth surface, which are smoothly rounded off, in particular in the region of their connection to the peripheral surface of the crossbar 2.
  • connection points 3 for the operation of the screen can also be disadvantageous, as already described with reference to the weld seams. The same applies to the points 5, which ensure the exact distance of the profile bars 1 from the adjacent profile bars.
  • Figure 5 shows the subject matter of the invention according to claim 3 or the claims referring to this.
  • the covers 4 close the disadvantageous cavities at the connection points and cover edges and ridges.
  • Figure 7 explains in particular claims 10 and 11. It is shown that the cover 4 is formed from the material of the previously applied weld.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Inert Electrodes (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Filtering Materials (AREA)
EP90121239A 1989-12-09 1990-11-07 Procédé de fabrication de tamis à fentes Expired - Lifetime EP0432448B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90121239T ATE99749T1 (de) 1989-12-09 1990-11-07 Verfahren zur herstellung eines spaltsiebes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940718 1989-12-09
DE3940718 1989-12-09

Publications (2)

Publication Number Publication Date
EP0432448A1 true EP0432448A1 (fr) 1991-06-19
EP0432448B1 EP0432448B1 (fr) 1994-01-05

Family

ID=6395127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121239A Expired - Lifetime EP0432448B1 (fr) 1989-12-09 1990-11-07 Procédé de fabrication de tamis à fentes

Country Status (5)

Country Link
US (1) US5237154A (fr)
EP (1) EP0432448B1 (fr)
AT (1) ATE99749T1 (fr)
CA (1) CA2030712A1 (fr)
DE (1) DE59004134D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020104A1 (fr) * 1995-11-28 1997-06-05 Ahlstrom Machinery Oy Procede de fabrication de crible en fils metalliques et crible en fils metalliques
EP1745879A1 (fr) * 2005-07-21 2007-01-24 Boll & Kirch Filterbau GmbH Méthode de fabrication de tamis à fente et produit
EP2477710A1 (fr) * 2009-09-14 2012-07-25 GEA Houle Inc. Tambour de separation de liquide, separateur pourvu de ce tambour et kit de montage associe
DE102015003020B3 (de) * 2015-03-06 2016-03-03 Andritz Fiedler Gmbh Stabsiebkorb

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0808941B1 (fr) * 1996-05-24 2001-12-12 Voith Sulzer Stoffaufbereitung GmbH Procédé de fabrication d'un appareil de tamisage à ouvertures en forme de fentes et appareil de tamisage produit par ce procédé
WO2001051168A1 (fr) * 2000-01-07 2001-07-19 Kadant Black Clawson, Inc. Crible a fils profiles cylindrique et son procede de fabrication
US6491168B1 (en) 2000-04-23 2002-12-10 J + L Fiber Services, Inc. Pulp screen basket
FR2809029B1 (fr) * 2000-05-16 2002-06-21 Johnson Filtration Systems Procede de fabrication d'un panier mecanique de filtration
US6460757B1 (en) 2000-11-14 2002-10-08 Newscreen As Apparatus and method for forming slotted wire screens
CA2444486C (fr) * 2001-04-16 2013-04-02 J & L Fiber Services, Inc. Epurateur a pate a papier et son procede
US7108152B2 (en) * 2002-02-08 2006-09-19 Henny Penny Corporation Fryer vats having strengthened vat welds and methods of manufacturing such fryer vats
JP2005230869A (ja) * 2004-02-20 2005-09-02 Toyoda Mach Works Ltd 異種金属ｔｉｇ溶接方法及びその溶接構造
US20090211965A1 (en) * 2008-02-21 2009-08-27 Weatherford/Lamb, Inc. Arrangement for splicing panels together to form a cylindrical screen
US8028691B2 (en) * 2008-10-27 2011-10-04 Johnson Screens, Inc. Passive solar wire screens for buildings
US9023456B2 (en) 2011-03-18 2015-05-05 Bilfinger Water Technologies, Inc. Profiled wire screen for process flow and other applications

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR329445A (fr) * 1903-02-20 1903-07-30 Carriere H Perfectionnements aux appareils d'épuration des pates à papier
EP0287408A1 (fr) * 1987-03-13 1988-10-19 E. et M. LAMORT Tamis pour épurateurs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370150A (en) * 1965-07-07 1968-02-20 Leonard Concrete Pipe Company Welding apparatus and method
DE1760694A1 (de) * 1968-06-21 1971-03-11 Kufferath Antonius Siebgewebe und Verfahren zu seiner Herstellung
BE792211A (fr) * 1971-12-03 1973-06-01 Rech Des Etats De Surface Cent Element filtrant
US4221319A (en) * 1978-08-09 1980-09-09 Paco Corporation Apparatus for welding metal grating structures
US4221951A (en) * 1978-10-10 1980-09-09 Connolly James D Screen welding machine
DE8910605U1 (de) * 1989-09-06 1989-10-26 Steinhaus GmbH, 4330 Mülheim Schweißspaltsiebfeld

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR329445A (fr) * 1903-02-20 1903-07-30 Carriere H Perfectionnements aux appareils d'épuration des pates à papier
EP0287408A1 (fr) * 1987-03-13 1988-10-19 E. et M. LAMORT Tamis pour épurateurs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020104A1 (fr) * 1995-11-28 1997-06-05 Ahlstrom Machinery Oy Procede de fabrication de crible en fils metalliques et crible en fils metalliques
EP1745879A1 (fr) * 2005-07-21 2007-01-24 Boll & Kirch Filterbau GmbH Méthode de fabrication de tamis à fente et produit
EP2477710A1 (fr) * 2009-09-14 2012-07-25 GEA Houle Inc. Tambour de separation de liquide, separateur pourvu de ce tambour et kit de montage associe
EP2477710A4 (fr) * 2009-09-14 2013-03-13 Gea Houle Inc Tambour de separation de liquide, separateur pourvu de ce tambour et kit de montage associe
DE102015003020B3 (de) * 2015-03-06 2016-03-03 Andritz Fiedler Gmbh Stabsiebkorb
US10589196B2 (en) 2015-03-06 2020-03-17 Andritz Fiedler Gmbh Bar-type screen cage

Also Published As

Publication number Publication date
CA2030712A1 (fr) 1991-06-10
US5237154A (en) 1993-08-17
DE59004134D1 (de) 1994-02-17
EP0432448B1 (fr) 1994-01-05
ATE99749T1 (de) 1994-01-15

Similar Documents

Publication Publication Date Title
EP0432448B1 (fr) Procédé de fabrication de tamis à fentes
DE69824052T2 (de) Filtersieb
DE1561662A1 (de) Papiermaschinenlangsieb
DE3224187A1 (de) Verbund-gewebe als bespannung fuer papiermaschinen
EP0808941B1 (fr) Procédé de fabrication d'un appareil de tamisage à ouvertures en forme de fentes et appareil de tamisage produit par ce procédé
DE102010034195A1 (de) Schraubenförmig gewickeltes Kabel und Verfahren
DE60124901T2 (de) Verfahren zur herstellung von mechanischen siebkörben
DE4214061C2 (de) Siebvorrichtung
CH426046A (de) Schweissverfahren, bei dem zwei teilweise ummantelte Elektroden, insbesondere solche grosser Länge, nach der Stromzuführung an der Schweissstelle zu einem allseitig ummantelten Elektrodenpaar zusammengeführt werden
EP0763623B1 (fr) Bande pour machines à papier
DE19609316C2 (de) Verfahren zur Herstellung einer Siebvorrichtung mit kontrolliert ungleichmäßigen Sortierschlitzen sowie Siebvorrichtung und deren Verwendung
EP2729611B1 (fr) Structure plane thermiquement non fixée pour une toile en spirale et procédé de fabrication d'une toile en spirale
WO2003024643A2 (fr) Procede et dispositif de production d'une bande metallique dans une machine de coulee en bande a rouleaux
EP0531879A1 (fr) Lame de scie à ruban et procédé pour sa fabrication
EP0312744B1 (fr) Rouleau avec refroidissement intérieur et procédé pour sa fabrication
DE4224727A1 (de) Siebkorb
DE708104C (de) Strangpresse zur Herstellung von Rohren
EP0549748A1 (fr) Procede et dispositif pour le decoupage thermique d'une bande de textile fusible defilante.
EP3084072B1 (fr) Bande de tissu pour machine de production de bandes continues de matière fibreuse
EP3384789B1 (fr) Bande pour la fabrication de cigarettes ou de filtres de cigarettes et procédé de fabrication
DE19915700A1 (de) Vorrichtung und Verfahren zum Schmelzspinnen von geschmolzenem Polymermaterial
DE2843385B1 (de) Verfahren zum Verbinden der Bandenden eines Kunststoffbandes
DE1948514C2 (de) Verfahren zum Herstellen von auf Biegung beanspruchten Stahlerzeugnissen
WO2023078613A1 (fr) Vêtement et procédé
DE3022393A1 (de) Malscheibe fuer scheibenrefiner

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901107

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT SE

17Q First examination report despatched

Effective date: 19930331

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILA

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

REF Corresponds to:

Ref document number: 99749

Country of ref document: AT

Date of ref document: 19940115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59004134

Country of ref document: DE

Date of ref document: 19940217

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940316

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 90121239.9

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021021

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20021122

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20021125

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031107

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031108

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051107

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20051110

Year of fee payment: 16

Ref country code: DE

Payment date: 20051110

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130