EP1630282B1 - Sieb eines Siebzylinders - Google Patents

Sieb eines Siebzylinders Download PDF

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Publication number
EP1630282B1
EP1630282B1 EP20040255069 EP04255069A EP1630282B1 EP 1630282 B1 EP1630282 B1 EP 1630282B1 EP 20040255069 EP20040255069 EP 20040255069 EP 04255069 A EP04255069 A EP 04255069A EP 1630282 B1 EP1630282 B1 EP 1630282B1
Authority
EP
European Patent Office
Prior art keywords
screen
supporting bar
inset
predefined
screen cylinder
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.)
Revoked
Application number
EP20040255069
Other languages
English (en)
French (fr)
Other versions
EP1630282A1 (de
Inventor
Chia-Yin Wei
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.)
A One Machinery Co Ltd
Original Assignee
A One Machinery Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34930582&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1630282(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by A One Machinery Co Ltd filed Critical A One Machinery Co Ltd
Priority to EP20040255069 priority Critical patent/EP1630282B1/de
Priority to DE602004004113T priority patent/DE602004004113T2/de
Publication of EP1630282A1 publication Critical patent/EP1630282A1/de
Application granted granted Critical
Publication of EP1630282B1 publication Critical patent/EP1630282B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • 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

Definitions

  • the present invention relates to a screen for a screen cylinder according to the preamble of claim 1.
  • a screen is known from EP 0 499 154 A1.
  • Headbox screens represent the last line of defense against contaminants before pulp is made into paper.
  • the total structural integrity of the screen cylinder thereof is directly related to the aperture tolerance of the same, and both can have major affect on the resulting paper quality.
  • manufacturers have been making every efforts to improve the screen design and structural integrity of screen cylinder so as to achieve the requirements such as stable slot width
  • FIG. 1 is a 3-D diagram showing a screen for screen cylinder according to prior arts.
  • the screen cylinder 9 comprises a supporting bar 91 and a plurality of screen wires (92), wherein each screen wire is welded to a corresponding recess 93 of the supporting bar 91.
  • the screen cylinder 9 formed by welding has poor structural integrity that the screen wire will be loosen and even fall off by negative pressure caused by the centrifugal force during a screening operation.
  • FIG. 2 Another screen cylinder 8 is provided as seen in FIG. 2.
  • the screen cylinder 8 comprises a supporting bar 81 and a plurality of screen wires (82), wherein each screen wire is inset into a trough 83 which is further fixed by welding.
  • each screen wire is inset into a trough 83 which is further fixed by welding.
  • the improved structure of screen cylinder 8 is still vulnerable to the negative pressure that can be drawn out of the trough and fall off.
  • the screen cylinder 7 comprises a supporting bar 71 and a plurality of screen wires 72, wherein the screen wire has a ball-shaped inset end 74 matched with the ball-topped trough 74 such that the joint strength between the supporting bar and the screen wire is enhanced.
  • the screen cylinder 7 still has the shortcomings of large tolerance and weak structural integrity since the screen wire might not inset into the supporting bar deep enough and the ball-shaped inset end is still vulnerable to the negative pressure.
  • the primary object of the invention is to provide a screen cylinder with better structural integrity and smaller tolerance. Since the screen cylinder of the present invention has screen wires inset into a supporting bar with sufficient insetting depth which each further has an inset end with a near-rectangle recess matched with a convex formed inside the trough of the supporting bar, the screen wires are fixed solid, the screen cylinder is durable with long life span and is easy to assemble without welding, and as the consequences that the manufacturing cost is reduced.
  • FIG. 1 is a 3-D diagram showing a screen of a screen cylinder according to prior arts.
  • FIG. 2 is a 3-D diagram showing another screen of a screen cylinder according to prior arts.
  • FIG. 3 is a 3-D diagram showing yet another screen of a screen cylinder according to prior arts.
  • FIG. 4 is a sectional view of a screen of a screen cylinder according to the present invention.
  • FIG. 4 shows a sectional view of a screen of a screen cylinder according to the present invention.
  • the screen cylinder 1 of FIG. 4 comprises a supporting bar 1 and a plurality of screen wires 12.
  • the supporting bar 11 has a predefined thickness L and has a plurality of troughs 13 arranged thereon with equal spacing I, wherein each trough 13 has a convex 131 therein.
  • the convex 131 is formed in near rectangular shape, it can be formed in any geometry shape.
  • the screen wire has an inset end 122 and an extending end 121.
  • a side of the inset end 122 is arranged with a near-rectangle recess 123 such that the recess 123 can accept the convex 131 of the trough 13 while insetting the screen wire 12 into a corresponding trough 13 of the supporting bar 11.
  • the extending end 121 is protruding outwardly from the surface of the supporting bar 1 and has a predefined width W, where the predefined width W is smaller than the spacing I between troughs of the supporting bar.
  • the screen wire is inset into the supporting bar by a predefined depth D which is larger than a half of the predefined thickness, i.e. 1 ⁇ 2 L.
  • the supporting bar 11 is a circular bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)

Claims (4)

  1. Sieb für einen Siebzylinder mit:
    einem Trägerstab (11) mit einer vorbestimmten Dicke (L), wobei der Trägerstab (11) eine Mehrzahl von gleichmäßig beabstandeten Vertiefungen (13) besitzt, wobei jede Vertiefung (13) einen in ihr ausgebildeten konvexen Vorsprung (131) aufweist, und mit
    einer Mehrzahl von Siebdrähten (12), von denen jeder ein Einsetzende (122) und ein verlängertes Ende (121) aufweist, dadurch gekennzeichnet, dass eine Seite jedes Einsetzendes (122) eine nahezu rechtwinklige Ausnehmung (123) aufweist, die komplementär zum konvexen Vorsprung (131) einer entsprechenden Vertiefung (13) ausgebildet ist und dass jedes verlängerte Ende (121) nach außen von der Oberfläche des Trägerstabes (11) vorsteht, wobei jeder Siebdraht (12) in den Trägerstab (11) über eine vorbestimmte Tiefe (D) eingesetzt ist, die wenigstens der Hälfte der vorbestimmten Dicke (L) entspricht.
  2. Sieb nach Anspruch 1, bei dem die vorbestimmte Tiefe (D) größer als die Hälfte der vorbestimmten Dicke (L) ist.
  3. Sieb nach Anspruch 1 oder 2, bei dem das verlängerte Ende (121) jedes Siebdrahtes (12) eine vorbestimmte Breite (W) aufweist, die kleiner als der Abstand (I) zwischen benachbarten Vertiefungen (13) ist.
  4. Sieb nach einem der Ansprüche 1 bis 3, bei dem der Trägerstab (11) ein kreisförmiger Stab ist.
EP20040255069 2004-08-23 2004-08-23 Sieb eines Siebzylinders Revoked EP1630282B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20040255069 EP1630282B1 (de) 2004-08-23 2004-08-23 Sieb eines Siebzylinders
DE602004004113T DE602004004113T2 (de) 2004-08-23 2004-08-23 Sieb eines Siebzylinders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040255069 EP1630282B1 (de) 2004-08-23 2004-08-23 Sieb eines Siebzylinders

Publications (2)

Publication Number Publication Date
EP1630282A1 EP1630282A1 (de) 2006-03-01
EP1630282B1 true EP1630282B1 (de) 2007-01-03

Family

ID=34930582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040255069 Revoked EP1630282B1 (de) 2004-08-23 2004-08-23 Sieb eines Siebzylinders

Country Status (2)

Country Link
EP (1) EP1630282B1 (de)
DE (1) DE602004004113T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007015901B4 (de) 2007-04-02 2023-07-20 Andritz Fiedler Gmbh Siebvorrichtung
FI124683B (fi) 2010-10-06 2014-12-15 Aikawa Fiber Technologies Trust Menetelmä seulasylinterin valmistamiseksi

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104615A1 (de) * 1991-02-15 1992-08-20 Voith Gmbh J M Siebkorb

Also Published As

Publication number Publication date
EP1630282A1 (de) 2006-03-01
DE602004004113D1 (de) 2007-02-15
DE602004004113T2 (de) 2007-06-28

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