EP1217122A1 - Verfahren zur Herstellung von bei der Nasssiebung von Papierfasersuspensionen verwendbaren Sieben - Google Patents
Verfahren zur Herstellung von bei der Nasssiebung von Papierfasersuspensionen verwendbaren Sieben Download PDFInfo
- Publication number
- EP1217122A1 EP1217122A1 EP01122341A EP01122341A EP1217122A1 EP 1217122 A1 EP1217122 A1 EP 1217122A1 EP 01122341 A EP01122341 A EP 01122341A EP 01122341 A EP01122341 A EP 01122341A EP 1217122 A1 EP1217122 A1 EP 1217122A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- profile pieces
- profile
- holding openings
- openings
- screen plate
- 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
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
- Y10T29/49826—Assembling or joining
- Y10T29/49945—Assembling or joining by driven force fit
Definitions
- the invention relates to a method according to the preamble of claim 1.
- Sieves are used in pulp processing, e.g. B. in sorters of Pulp and paper industry to the fibrous suspension in one Treat wet screening. In most cases, non-fibers are said to be Contamination due to their size retained on a sieve and then be deposited. The fibers can together with some of the water Pass sorting openings. Fabric dissolvers are also often provided with sieves that hold back paper that has not yet dissolved and coarse contaminants. There are also other applications, e.g. around fiber-containing suspensions according to the fiber length fractionate. Basically, such screens can be flat or curved. They exist mostly made of metal, e.g. alloy high quality steel. They are called sieve baskets if they are rotationally symmetrical, e.g. are cylindrical.
- Such screens are subject to considerable wear in many applications. This stems primarily from the fact that e.g. with the use already mentioned in Paper fiber suspensions also have a certain dirt load in the range of Sieves. This dirt load can e.g. from metal parts, broken glass, sand or Stones exist. Since it is the task of these sieves to retain such dirt, they produce a considerable amount in cooperation with the clearer moving past Wear. Long armor has therefore been used for a long time wear-resistant materials, e.g. by cladding. In other cases finished wear strips attached to the screen plate. Such strips or In addition to the turbulence increase already mentioned, armor plating can also do that Protect the strainer from wear. Patches are e.g. from DE 195 06 084 A1 known. The production and attachment requires a greater effort, especially since they often consist of wear-resistant but brittle material.
- the invention is based on the object of a method for producing sieves that can either reduce costs without sacrificing quality, especially their robustness, suffers, or with which the wear resistance and thus the life of the screen is increased.
- the profile pieces used according to the invention are relatively simple as standard parts even if they are made of very hard, highly wear-resistant material, e.g. sintered hard metal.
- a holding opening in the screen plate which mostly consists of a tough, high-strength metal alloy, they can be easily pressed in Fasten.
- the material of the screen plate preferably deforms and is the same the shape of the profile piece. Welding is not necessary. worn Profiles can be knocked out and replaced with new ones.
- Flat sieves are particularly well suited for production using this method. She are also mostly used where rough operation leads to high Leads to wear. The profile pieces can be pressed in with flat sieves perform easily.
- the sieve apparatuses are mostly built into the flat sieves should be provided with a support structure that prevents the sieves from bending prevented. This is a possible weakening of the screen plate by the Holding openings are usually without disadvantage.
- the profile pieces can also be placed at a distance. Another It would be possible to provide the profile pieces with a paragraph so that the over the Part protruding from the sieve surface is wider than the part pressed into the holding opening. The would be more expensive, but the holding openings could have a larger distance. at sufficiently thick screen plate, the holding openings can be blind holes, so that the tensile surface of the screen plate not or only very fine (ventilation at Press) must be drilled through.
- Fig. 1 shows the part of a sieve, in which in the sieve 1 according to the invention Variety of profile pieces 3 is used. These are grouped together, and in such a way that the group forms a bar.
- the sieve is flat and has one circular outer diameter.
- the sieve is also included screwed strips 8 provided.
- the mounting holes which are usually a Such a sieve is not shown here.
- the sorting openings 7 are at this Figure drawn in only a small part. The viewing direction of this figure is directed to the side of the sieve where the suspension to be sieved comes in and on which the sieve clearer is also located.
- Sorting opening 7 In the section through the screen plate 1 shown in FIG. 2, one can be seen as an example Sorting opening 7 and the lower part of the holding opening 2. This is preferred circular and has a slightly smaller diameter d than the corner dimension e of Profile piece 3.
- the latter consists of an octagon profile with regular Cross-section.
- the illustration shows the moment of the manufacturing process at which the Profile piece 3 is pressed approximately halfway into the sieve plate 1.
- the side surfaces 4 of the Profile piece 3 are at right angles to the surface of the sieve ⁇ .
- the Sorting opening 7 has a circular cylindrical shape on its inlet side, which then in a conical extension (seen in the direction of flow). Such Sorting openings are typical for sieves used for sorting impurities Paper fiber suspensions are to be used.
- At the bottom of Fig. 2 is the Clamping fit between the round holding opening and the octagonal profile piece under supervision shown.
- Fig. 3 the press-in process is complete, i.e. the profile piece 3 is complete inserted through the sieve plate 1. It can be seen that the profile piece 3 due to protrudes its length above the sieve plate 1.
- the protrusion 5 has the height h, which in usually a few millimeters. Another protrusion 5 is also visible, partially covered by the profile piece 3 lying in front of it, which leads to another one in the Sieve plate 1 used profile piece belongs.
- Fig. 4 shows the arrangement of several belonging to each other in somewhat more detail Profile pieces 3.
- a holding opening 2 with diameter d At the bottom of this Sieve sheet cutout is a holding opening 2 with diameter d, in which the associated profile piece is not yet used.
- This representation also shows the Sorting openings 7.
- the profile pieces so that they 5 have an overhang 5 ', which in the direction of the neighboring Profile piece has a greater width than the lower part of the profile piece 3 'used.
- the holding openings can then be arranged at a greater distance if the protrusions 5 'touch or have a very small distance should.
- 5 shows a varied sorting opening 7 'as an example chamfer on the inlet side. This shape is particularly favorable for high throughput and can can also be used in other cases.
- the combination of profile pieces 3 with attached strips 8 shows, as FIG. 6 shows by way of example, there is also the possibility of all required Elevations on the screen plate in the form of the profile pieces 3 already described produce.
- the groups of profile pieces can be created so that either form linearly aligned rows or that adjacent profile pieces are offset from each other. In all of these cases, on the inlet side of the screen ledge-shaped elevations that produce the known turbulence-increasing effect to have. They are either strictly radial, as shown here, or have an oblique angle to promote the sliding of solids. You can also be arched.
- FIG. 7 shows such a version be crushed, this effect being controlled by the distance to the rotor can be.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
- Fig. 1
- Teilansicht eines erfindungsgemäß hergestellten Siebes;
- Fig. 2 und 3
- je einen Schnitt durch den Teil eines Siebes;
- Fig. 4
- etwas detaillertere Aufsicht auf das Sieb;
- Fig. 5
- Teilschnitt durch ein Sieb mit variiertem Profilstück;
- Fig. 6 und 7
- je eine variierte Anordnung der erfindungsgemäß eingesetzten Profilstücke.
Claims (20)
- Verfahren zur Herstellung von bei der Nasssiebung von Papierfasersuspensionen verwendbaren Sieben, die aus wenigstens einem Siebblech (1) bestehen, welches eine Vielzahl von Sortieröffnungen (7,7') aufweist,
dadurch gekennzeichnet, dass das Siebblech (1) mit einer Mehrzahl von Halteöffnungen (2) versehen wird, dass danach in diese Halteöffnungen (2) Profilstücke (3, 3') derart eingesetzt werden, dass sie über die Siebfläche hervorstehen. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass Seitenflächen (4) der Profilstücke (3,3') im Wesentlichen senkrecht zur Sieboberfläche stehen. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Profilstücke (3, 3') so eingesetzt werden, dass der Überstand über der Sieboberfläche mindestens zwei Millimeter und höchstens 30 Millimeter beträgt. - Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, dass die Profilstücke (3, 3') ein regelmäßiges, polygonförmiges Profil haben. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass das polygonförmige Profil ein Achteck ist. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Profilstücke (3, 3') aus einem hochverschleißfesten Material hergestellt werden. - Verfahren nach Anspruch 6,
dadurch gekennzeichnet, dass die Profilstücke (3, 3') aus einer gesinterten Metalllegierung hergestellt werden. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet, dass ein Wolfram-Karbid-Pulver zu fertigen Profilstücken (3,3') gesintert wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Querschnittsfläche eines Profilstückes (3, 3') zwischen 50 und 200 mm2 liegt. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Höhe (h) des Überstandes (5, 5') der Profilstücke (3, 3') über dem Siebblech (1) zwischen 2 und 15 mm beträgt. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Halteöffnungen (2) rund sind und dass ihr Durchmesser (d) kleiner ist als das Eckmaß (e) der Profilstücke (3,3') und dass beim Einfügen der Profilstücke (3,3') in die Halteöffnungen (2) ein Klemmsitz erzeugt wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Halteöffnungen (2') durchgehend sind und an der Seite, an der die Profilstücke eingesetzt werden, einen größeren Querschnitt haben als an der Gegenseite. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Halteöffnungen (2, 2') jeweils in Gruppen angeordnet werden und dass die Halteöffnungen einer Gruppe jeweils auf einer Linie liegen, wobei die Ränder von auf einer Linie liegenden, benachbarten Halteöffnungen (2, 2') nur einen geringen Abstand voneinander haben. - Verfahren nach Anspruch 13,
dadurch gekennzeichnet, dass die Linien der Halteöffnungen (2,2') gerade sind. - Verfahren nach Anspruch 13,
dadurch gekennzeichnet, dass die Linien gebogen sind. - Verfahren nach Anspruch 13,
dadurch gekennzeichnet, dass die Linien (6) zickzackförmig sind. - Verfahren nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, dass die Halteöffnungen (2,2') einzeln auf dem Siebblech (1) angeordnet werden und dabei einen Abstand von mindestens 50 mm aufweisen. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass auf dem Siebblech (1) sowohl Profilstücke (3, 3') eingesetzt als auch Leisten (8) aufgesetzt werden. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Sortieröffnungen (7, 7') Kreisquerschnitte haben mit einem Durchmesser (d) zwischen 1 und 30 mm. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass das Siebblech (1) aus einer hochfesten Metalllegierung hergestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10065931A DE10065931A1 (de) | 2000-12-22 | 2000-12-22 | Verfahren zur Herstellung von bei der Nasssiebung von Papierfasersuspensionen verwendbaren Sieben |
DE10065931 | 2000-12-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1217122A1 true EP1217122A1 (de) | 2002-06-26 |
EP1217122B1 EP1217122B1 (de) | 2006-04-05 |
Family
ID=7669547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01122341A Expired - Lifetime EP1217122B1 (de) | 2000-12-22 | 2001-09-19 | Verfahren zur Herstellung von bei der Nasssiebung von Papierfasersuspensionen verwendbaren Sieben |
Country Status (5)
Country | Link |
---|---|
US (1) | US6905032B2 (de) |
EP (1) | EP1217122B1 (de) |
AT (1) | ATE322571T1 (de) |
CA (1) | CA2365792A1 (de) |
DE (2) | DE10065931A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2758588B1 (de) | 2011-09-19 | 2016-02-03 | Guenter Betz | Stofflöser zum aufschlagen von altpapieren und zellstoffen |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080224876A1 (en) * | 2007-03-14 | 2008-09-18 | Dan Fish | Leak Detection Apparatus |
DE102007020325B3 (de) * | 2007-04-30 | 2009-01-15 | Voith Patent Gmbh | Verfahren zur Herstellung eines Siebes für die Behandlung von zur Papiererzeugung geeigneten Faserstoffsuspensionen |
JP6460741B2 (ja) * | 2014-08-06 | 2019-01-30 | 相川鉄工株式会社 | 製紙用ストレーナ及び製紙用異物分離装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0205623A1 (de) * | 1984-12-25 | 1986-12-30 | Mitsubishi Jukogyo Kabushiki Kaisha | Druckschlitzsieb |
EP0479203A1 (de) * | 1990-10-01 | 1992-04-08 | Aikawa Iron Works Co., Ltd. | Stofflöser für Papierherstellung |
EP0807709A1 (de) * | 1996-05-18 | 1997-11-19 | Voith Sulzer Stoffaufbereitung GmbH | Vorrichtung zum Sortieren von faserstoffhaltiger Suspension |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2465056A (en) * | 1945-03-22 | 1949-03-22 | Auraldo W Bond | Mill screen with auxiliary perforate baffles on operating face |
US3150038A (en) * | 1962-09-21 | 1964-09-22 | Improved Machinery Inc | Continuous pulping apparatus |
US3972974A (en) * | 1970-09-04 | 1976-08-03 | Pico Francisco A | Manufacture of abrasion-resistant screening apparatus |
US5023986A (en) * | 1988-06-10 | 1991-06-18 | Beloit Corporation | Method of manufacturing a wave screen plate |
US5041212A (en) * | 1990-01-02 | 1991-08-20 | Beloit Corporation | Efficiency screen plate for screening pulp |
JPH03249296A (ja) * | 1990-02-23 | 1991-11-07 | Honshu Paper Co Ltd | 耐摩耗性スクリーンプレート |
ZA95663B (en) * | 1993-10-28 | 1996-07-29 | Galison Drilling Pty Ltd | Mounting drill buttons |
US5762843A (en) * | 1994-12-23 | 1998-06-09 | Kennametal Inc. | Method of making composite cermet articles |
DE19506084A1 (de) | 1995-02-22 | 1996-08-29 | Lohse Verwaltungs Gmbh | Siebeinheit zum Sortieren von Suspensionen |
US6254729B1 (en) * | 1999-03-22 | 2001-07-03 | Voith Sulzer Paper Technology North America, Inc. | Pulper with extraction plate assembly having removable inserts and method of manufacturing same |
-
2000
- 2000-12-22 DE DE10065931A patent/DE10065931A1/de not_active Withdrawn
-
2001
- 2001-09-19 AT AT01122341T patent/ATE322571T1/de not_active IP Right Cessation
- 2001-09-19 EP EP01122341A patent/EP1217122B1/de not_active Expired - Lifetime
- 2001-09-19 DE DE50109425T patent/DE50109425D1/de not_active Expired - Lifetime
- 2001-12-21 CA CA002365792A patent/CA2365792A1/en not_active Abandoned
- 2001-12-21 US US10/023,995 patent/US6905032B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0205623A1 (de) * | 1984-12-25 | 1986-12-30 | Mitsubishi Jukogyo Kabushiki Kaisha | Druckschlitzsieb |
EP0479203A1 (de) * | 1990-10-01 | 1992-04-08 | Aikawa Iron Works Co., Ltd. | Stofflöser für Papierherstellung |
EP0807709A1 (de) * | 1996-05-18 | 1997-11-19 | Voith Sulzer Stoffaufbereitung GmbH | Vorrichtung zum Sortieren von faserstoffhaltiger Suspension |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2758588B1 (de) | 2011-09-19 | 2016-02-03 | Guenter Betz | Stofflöser zum aufschlagen von altpapieren und zellstoffen |
Also Published As
Publication number | Publication date |
---|---|
ATE322571T1 (de) | 2006-04-15 |
DE50109425D1 (de) | 2006-05-18 |
CA2365792A1 (en) | 2002-06-22 |
US6905032B2 (en) | 2005-06-14 |
DE10065931A1 (de) | 2002-06-27 |
EP1217122B1 (de) | 2006-04-05 |
US20020079072A1 (en) | 2002-06-27 |
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