EP0837178A1 - Process for making screens and screen obtained by this method - Google Patents
Process for making screens and screen obtained by this method Download PDFInfo
- Publication number
- EP0837178A1 EP0837178A1 EP97114817A EP97114817A EP0837178A1 EP 0837178 A1 EP0837178 A1 EP 0837178A1 EP 97114817 A EP97114817 A EP 97114817A EP 97114817 A EP97114817 A EP 97114817A EP 0837178 A1 EP0837178 A1 EP 0837178A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sieve
- strips
- profile bars
- profile
- sieve strips
- 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
- 238000000034 method Methods 0.000 title claims description 26
- 239000000725 suspension Substances 0.000 claims abstract description 6
- 239000000969 carrier Substances 0.000 claims abstract 6
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000005304 joining Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 6
- 240000003517 Elaeocarpus dentatus Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- Y10T29/49908—Joining by deforming
Definitions
- the invention relates to a method according to the preamble of claim 1.
- a sieve produced in this way can e.g. be a strainer basket in pressure sorters the pulp and paper industry is used to the fibrous suspension to be treated in a kind of re-screening.
- non-fibers are said to be Contamination due to their size retained on a screen element and then be deposited.
- the fibers can together with some of the water Pass sorting openings.
- There are other uses of such devices e.g. around to fractionate fiber-containing suspensions according to the fiber length or to e.g. to let unwanted fines through the sieve element and the fibers hold back. Basically, such machines are widely known and are often used.
- the screen element inserts are called screen baskets if they rotationally symmetrical, e.g. are cylindrical. To clog the Preventing sorting openings will usually move close to them Used reamer.
- Sieves which are produced by the method according to the invention can also be used outside of the pulp and paper industry.
- sorting openings for the seven.
- Man distinguishes between essentially round openings and elongated ones, the elongated openings in the extreme case are gaps that extend over the entire axial extent the sieve baskets run.
- the manufacturing processes are at the sorting openings adapted, which is why they are often essential for perforated screen baskets and slotted screen baskets differentiate.
- Modern manufacturing processes have already been found for slotted screens in which the sorting openings, i.e. the gaps, are arranged in parallel Rods are formed. However, this procedure is still due to the large number of Bars very expensive.
- the sorting openings are generally known through Methods such as Drilling or electrical erosion, placed in a sheet metal plate.
- Drilling or electrical erosion placed in a sheet metal plate.
- Stamped sheets are used in special cases. Even if the production processes rationalized by automatically working machines, especially the boring mills they are still quite expensive.
- the invention has for its object to provide a method for producing screens create, with which the costs can be reduced without the quality deteriorating becomes.
- the effort involved in the production of screens of different sizes should also be be small.
- Such sieve strips are easier to drill than the complete sieve plates because they are narrower and can be easily machined in a relatively small boring machine.
- a high degree of automation is possible in the manufacture and assembly of the parts. In in many cases they can have a smaller wall thickness due to the supporting profile bars have as perforated sieves or sieve shells formed from one piece. It is also important, that depending on the requirement and the size of the throughput in practice of different sizes Flat sieves or sieve baskets are required. While according to the state of the art manufactured strainer baskets of different sizes large and complex Manufacturing plants may require in the inventive method same plant sieve baskets of different diameters and different Height. The same applies to flat screens of different sizes.
- Fig. 1 you can see the components that are used to manufacture the invention Siebes are needed in an already assembled arrangement, but before Deformation step.
- the sieve strips 2 contain on their long sides 4 over their longitudinal extent shaped surfaces 5. These are here inclined planes, which are located laterally on the elevations 9 on the sieve strips are located.
- the profile bars 1 contain mutually opposite grooves 8, which in essentially the above-mentioned shaped surfaces 5 of the sieve strips 2 complementary correspond. In this way there is a form-fit connection between the sieve strips and the profile bars possible.
- the profile bars 1 are in turn with a joining contour 10 provided, drawn here below, and point at the opposite of the joining contour Page 10, the top, elevations 11.
- the one, partially drawn here 3 has upwardly open recesses 6 which are at a distance a from one another are introduced. In these recesses 6 are the profile bars 1 with the help of their Anchored contour 10.
- the distance a and the width b of the sieve strips 2 are so chosen that a close-fitting bond between sieve strips and profile bars arises.
- Fig. 2 shows a variant in which the profile bars 1 on the joining contour 10th have an elevation 11 on the opposite side of the head, the upper edge of which is chamfered and which takes the angle ⁇ to the top 12 of the adjacent sieve strip. It is useful that the top of the profile bar and the top 12 of the Sieve strip on the scraper side of the sieve, with the scraper side what is meant is, on which - as already mentioned at the beginning - a scraper is moved past. Such bevels have in cooperation with the reamer and the inflowing suspension has a turbulence-increasing effect, which mostly leads to Keeping the sorting openings clear is an advantage.
- the bevel is like this chosen that, seen in the direction of the scraper movement (arrow R), the flow from the Deflects the surface of the sieve strips.
- Fig. 2 includes a Sieve strips, viewed in the transverse direction, two rows of sorting openings. How many such rows in the transverse direction of the sieve strips depends on the later operating conditions under which the sieve produced according to the invention should be used from.
- the design of the head side on the profile bars 1 depends on the Operating conditions of the sieve. As already mentioned, measures can be taken at the Head side lead to desired turbulence, which improve the function of the sieve. Therefore, these profile bars are both a carrying function for the sieve strips and also a hydraulic function, especially because of the possibility of design of the headboard. Cases are conceivable in which the head part is kept as small as possible is so that it essentially adjusts to the course of the upper edge of the sieve. Design options are available for this purpose within the scope of the invention. E.g. can also, but does not have to be reversed, as shown in Fig. 3, the guide geometry. i.e. that the sieve strips 2 'contain grooves 13 and the profile bars 1' projections 14th
- Fig. 4 shows a perspective view of the example of an invention manufactured arcuate sieve as a partial view. It can become a strainer or too belong to a sieve cylinder (sieve basket). Because the necessary for the production of the sieve Deformation step has taken place, you can see the final arc shape.
- Fig. 5 is similar in some respects to Fig. 3, but in contrast to this already completes this shaped sieve.
- Profile bars 1, sieve strips 2 and carrier 3 are through Residual stresses (arrows F) are positively connected to each other, whereby here has formed the shape of a flat plane screen.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
- Paper (AREA)
- Steroid Compounds (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method according to the preamble of claim 1.
Ein hierdurch hergestelltes Sieb kann z.B. ein Siebkorb sein, der in Drucksortierern der Zellstoff- und Papierindustrie eingesetzt wird, um die faserstoffhaltige Suspension in einer Art Nachsiebung zu behandeln. Dabei sollen in den meisten Fällen faserfremde Verunreinigungen aufgrund ihrer Größe an einem Siebelement zurückgehalten und dann abgeschieden werden. Die Fasern können dabei zusammen mit einem Teil des Wassers die Sortieröffnungen passieren. Es gibt auch andere Anwendungen solcher Apparate, z.B. um faserstoffhaltige Suspensionen nach der Faserlänge zu fraktionieren oder auch um z.B. unerwünschte Feinststoffe durch das Siebelement passieren zu lassen und die Fasern zurückzuhalten. Grundsätzlich sind solche Maschinen weithin bekannt und werden oft eingesetzt. Die Siebelementeinsätze werden Siebkörbe genannt, wenn sie rotationssymmetrisch, z.B. zylindrisch aufgebaut sind. Um ein Verstopfen der Sortieröffnungen zu verhindern, werden meist sich dicht an ihnen vorbeibewegende Räumer verwendet. Siebe, die nach dem erfindungsgemäßen Verfahren hergestellt sind, können auch außerhalb der Zellstoff- und Papierindustrie Verwendung finden.A sieve produced in this way can e.g. be a strainer basket in pressure sorters the pulp and paper industry is used to the fibrous suspension to be treated in a kind of re-screening. In most cases, non-fibers are said to be Contamination due to their size retained on a screen element and then be deposited. The fibers can together with some of the water Pass sorting openings. There are other uses of such devices, e.g. around to fractionate fiber-containing suspensions according to the fiber length or to e.g. to let unwanted fines through the sieve element and the fibers hold back. Basically, such machines are widely known and are often used. The screen element inserts are called screen baskets if they rotationally symmetrical, e.g. are cylindrical. To clog the Preventing sorting openings will usually move close to them Used reamer. Sieves which are produced by the method according to the invention, can also be used outside of the pulp and paper industry.
Man kann davon ausgehen, daß derartige Maschinen und die darin verwendeten Siebe ihren Zweck in der Regel erfüllen. Wie überall in der Industrie üblich, wird jedoch die ökonomische Seite solcher Trennprozesse sehr wichtig erachtet, weshalb es immer wieder Versuche gegeben hat, die - auch als Verschleißteile anzusehenden - Siebe zu verbilligen. Dabei handelt es sich bei diesen Teilen nämlich um recht teure Gegenstände, die oftmals in bestimmten Abständen zu ersetzen sind. Daher ist das besondere Bemühen der Hersteller solcher Siebe darauf gerichtet, diese möglichst preiswert herstellen zu können. It can be assumed that such machines and the screens used therein usually serve their purpose. As is common throughout the industry, however The economic side of such separation processes is very important, which is why it always does has again attempted to close the screens, which can also be regarded as wearing parts cheaper. These parts are really expensive items, which are often to be replaced at certain intervals. Hence the special effort the manufacturer of such screens aims to produce them as cheaply as possible can.
Bekanntlich gibt es bei den Sieben unterschiedliche Formen der Sortieröffnungen. Man unterscheidet zwischen im wesentlichen runden Öffnungen und länglichen, wobei die länglichen Öffnungen im Extremfall Spalte sind, die über die gesamte Axialerstreckung der Siebkörbe verlaufen. Die Herstellungsverfahren sind an die Sortieröffnungen angepaßt, weshalb sie sich oft für Lochsiebkörbe und Spaltsiebkörbe wesentlich unterscheiden. Bei Spaltsieben sind bereits moderne Herstellungsverfahren gefunden worden, bei denen die Sortieröffnungen, also die Spalte, zwischen parallel angeordneten Stäben gebildet werden. Dieses Verfahren ist aber nach wie vor wegen der Vielzahl der Stäbe sehr aufwendig.As is known, there are different types of sorting openings for the seven. Man distinguishes between essentially round openings and elongated ones, the elongated openings in the extreme case are gaps that extend over the entire axial extent the sieve baskets run. The manufacturing processes are at the sorting openings adapted, which is why they are often essential for perforated screen baskets and slotted screen baskets differentiate. Modern manufacturing processes have already been found for slotted screens in which the sorting openings, i.e. the gaps, are arranged in parallel Rods are formed. However, this procedure is still due to the large number of Bars very expensive.
Bei Lochsieben werden die Sortieröffnungen in der Regel durch an sich bekannte Verfahren, wie z.B. Bohren oder Elektro-Erosion, in eine Blechplatte eingebracht. In speziellen Fällen werden gestanzte Bleche verwendet. Auch wenn die Produktionsabläufe durch automatisch arbeitende Maschinen, insbesondere der Bohrwerke, rationalisiert werden konnten, sind sie immer noch recht teuer.In the case of perforated sieves, the sorting openings are generally known through Methods such as Drilling or electrical erosion, placed in a sheet metal plate. In Stamped sheets are used in special cases. Even if the production processes rationalized by automatically working machines, especially the boring mills they are still quite expensive.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Sieben zu schaffen, mit dem die Kosten reduziert werden können, ohne daß die Qualität schlechter wird. Auch soll der Aufwand bei der Produktion von Sieben von unterschiedlicher Größe gering sein.The invention has for its object to provide a method for producing screens create, with which the costs can be reduced without the quality deteriorating becomes. The effort involved in the production of screens of different sizes should also be be small.
Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in the characterizing part of claim 1 solved.
Derartige Siebstreifen sind einfacher zu bohren als die kompletten Siebbleche, da sie schmaler sind und leicht in einem relativ kleinen Bohrwerk bearbeitet werden können. Bei Herstellung und Montage der Teile ist ein hoher Automatisierungsgrad möglich. In vielen Fällen können sie wegen der mittragenden Profilstäbe eine geringere Wandstärke haben als aus einem Stück geformte, gelochte Siebe oder Siebmäntel. Wichtig ist auch, daß je nach Anforderung und Größe des Durchsatzes in der Praxis unterschiedlich große Plansiebe oder Siebkörbe erforderlich sind. Während nach dem Stand der Technik hergestellte Siebkörbe unterschiedlicher Größen große und aufwendige Fertigungsanlagen erfordern, können bei dem erfindungsgemäßen Verfahren auf derselben Anlage Siebkörbe unterschiedlichen Durchmessers und unterschiedlicher Höhe hergestellt werden. Ähnliches gilt auch für ebene Siebe unterschiedlicher Größe.Such sieve strips are easier to drill than the complete sieve plates because they are narrower and can be easily machined in a relatively small boring machine. A high degree of automation is possible in the manufacture and assembly of the parts. In in many cases they can have a smaller wall thickness due to the supporting profile bars have as perforated sieves or sieve shells formed from one piece. It is also important, that depending on the requirement and the size of the throughput in practice of different sizes Flat sieves or sieve baskets are required. While according to the state of the art manufactured strainer baskets of different sizes large and complex Manufacturing plants may require in the inventive method same plant sieve baskets of different diameters and different Height. The same applies to flat screens of different sizes.
Werden mit Hilfe des erfindungsgemäßen Verfahrens Siebkörbe oder Siebschalen hergestellt, entfällt wegen des Aufbaus aus meheren Siebstreifen das problematische Biegen von gelochten, großflächigen Siebblechen, welches dazu führen kann, daß die Siebkörbe nicht ausreichend präzise herstellbar sind.Using the method according to the invention, sieve baskets or sieve trays manufactured, the problematic is eliminated due to the structure of several sieve strips Bending perforated, large-area sieve plates, which can lead to the Sieve baskets cannot be manufactured with sufficient precision.
Die Erfindung und ihre Vorteile werden erläutert anhand von Zeichnungen. Dabei zeigen:
- Fig. 1
- Teil eines erfindungsgemäß hergestellten Siebes während der Herstellung;
- Fig. 2+3
- jeweils Varianten mit unterschiedlichen Profilstäben;
- Fig. 4
- perspektivisch: Teil eines erfindungsgemäß hergestellten Siebes nach Durchführung der Verformung;
- Fig. 5
- Teilansicht eines durch das Verfahren hergestellten Plansiebes.
- Fig. 1
- Part of a sieve produced according to the invention during manufacture;
- Fig. 2 + 3
- Variants with different profile bars;
- Fig. 4
- perspective: part of a sieve produced according to the invention after the deformation has been carried out;
- Fig. 5
- Partial view of a plane screen produced by the method.
Auf der Fig. 1 erkennt man die Bauteile, die zur Herstellung des erfindungsgemäßen
Siebes benötigt werden in bereits gefügter Anordnung, jedoch vor dem
Verformungsschritt. Dabei sieht man Siebstreifen 2 mit den bereits eingebrachten
Sortieröffnungen 7, die hier beispielhaft von oben nach unten, was der geplanten
Strömungsrichtung entspricht, sich konisch erweiternde Bohrungen aufweisen.
Selbstverständlich sind auch andere Öffnungsformen denkbar. Die Siebstreifen 2
enthalten an ihren Längsseiten 4 über ihre Längserstreckung Formflächen 5. Diese sind
hier schräge Ebenen, die sich seitlich auf den Erhebungen 9 an den Siebstreifen
befinden. Die Profilstäbe 1 enthalten beidseitig gegenüberliegende Nuten 8, welche im
wesentlichen den genannten Formflächen 5 der Siebstreifen 2 komplementär
entsprechen. Auf diese Weise ist ein Formfügeverbund zwischen den Siebstreifen und
den Profilstäben möglich. Die Profilstäbe 1 ihrerseits sind mit einer Fügekontur 10
versehen, hier unten gezeichnet, und weisen an der der Fügekontur entgegengesetzten
Seite 10, der Kopfseite, Erhebungen 11 auf. Der eine, hier teilweise gezeichnete Träger
3 hat nach oben hin offene Ausnehmungen 6, die in einem Abstand a zueinander
eingebracht sind. In diese Ausnehmungen 6 sind die Profilstäbe 1 mit Hilfe ihrer
Fügekontur 10 verankert. Der Abstand a und die Breite b der Siebstreifen 2 sind so
gewählt, daß ein eng anliegender Verbund zwischen Siebstreifen und Profilstäben
entsteht.On Fig. 1 you can see the components that are used to manufacture the invention
Siebes are needed in an already assembled arrangement, but before
Deformation step. You can see
Fig. 2 zeigt eine Variante, bei der die Profilstäbe 1 auf der der Fügekontur 10
gegenüberliegenden Kopfseite eine Erhebung 11 aufweisen, deren Oberkante abgeschrägt
ist und die zur Oberseite 12 des benachbarten Siebstreifens den Winkel α einnimmt.
Zweckmäßig ist es, daß die Kopfseite des Profilstabes sowie die Oberseite 12 des
Siebstreifens auf der Räumerseite des Siebes liegen, wobei mit Räumerseite die Seite
gemeint ist, auf der - wie bereits eingangs erwähnt - ein Räumer vorbeibewegt wird.
Derartige Abschrägungen haben im Zusammenwirken mit dem Räumer und der
anströmenden Suspension eine turbulenzerhöhende Wirkung, was zumeist zur
Freihaltung der Sortieröffnungen von Vorteil ist. In der Regel wird die Abschrägung so
gewählt, daß sie, in Räumerbewegungsrichtung (Pfeil R) gesehen, die Strömung von der
Oberfläche der Siebstreifen weglenkt. Bei dem in Fig. 2 gezeigten Beispiel enthält ein
Siebstreifen, in Querrichtung betrachtet, zwei Reihen von Sortieröffnungen. Wieviele
solcher Reihen in Querrichtung der Siebstreifen angeordnet werden, hängt von den
späteren Einsatzbedingungen, unter denen das erfindungsgemäß hergestellte Sieb
benutzt werden soll, ab.Fig. 2 shows a variant in which the profile bars 1 on the joining contour 10th
have an
Die Ausgestaltung der Kopfseite an den Profilstäben 1 richtet sich nach den
Einsatzbedingungen des Siebes. Wie bereits erwähnt, können Maßnahmen an der
Kopfseite zu gewünschten Turbulenzen führen, die die Funktion des Siebes verbessern.
Daher fällt diesen Profilstäben sowohl eine Tragefunktion für die Siebstreifen zu, als
auch eine hydraulische Funktion, insbesondere wegen der Möglichkeit zur Ausgestaltung
des Kopfteiles. Es sind Falle denkbar, bei denen der Kopfteil möglichst klein gehalten
wird, so daß er sich im wesentlichen an den Verlauf der Oberkante des Siebes angleicht.
Hierzu sind im Rahmen der Erfindung Gestaltungsmöglichkeiten vorhanden. Z.B. kann
auch, muß aber nicht, wie in Fig. 3 gezeigt, die Führungsgeometrie umgekehrt werden.
d.h. daß die Siebstreifen 2' Nuten 13 enthalten und die Profilstäbe 1' Vorsprünge 14.The design of the head side on the profile bars 1 depends on the
Operating conditions of the sieve. As already mentioned, measures can be taken at the
Head side lead to desired turbulence, which improve the function of the sieve.
Therefore, these profile bars are both a carrying function for the sieve strips and
also a hydraulic function, especially because of the possibility of design
of the headboard. Cases are conceivable in which the head part is kept as small as possible
is so that it essentially adjusts to the course of the upper edge of the sieve.
Design options are available for this purpose within the scope of the invention. E.g. can
also, but does not have to be reversed, as shown in Fig. 3, the guide geometry.
i.e. that the sieve strips 2 'contain
Fig. 4 zeigt in perspektivischer Darstellung das Beispiel eines erfindungsgemäß hergestellten bogenförmigen Siebes als Teilansicht. Es kann zu einer Siebschale oder zu einem Siebzylinder (Siebkorb) gehören. Da der zur Herstellung des Siebes notwendige Verformungsschritt erfolgt ist, erkennt man die endgültige Bogenform.Fig. 4 shows a perspective view of the example of an invention manufactured arcuate sieve as a partial view. It can become a strainer or too belong to a sieve cylinder (sieve basket). Because the necessary for the production of the sieve Deformation step has taken place, you can see the final arc shape.
Fig. 5 ähnelt in manchem der Fig. 3, stellt aber im Gegensatz zu dieser das bereits fertig
geformte Sieb dar. Profilstäbe 1, Siebstreifen 2 und Träger 3 sind durch
Eigenspannungen (Pfeile F) formschlüssig fest miteinander verbunden, wobei sich hier
die Form eines ebenen Plansiebes gebildet hat.Fig. 5 is similar in some respects to Fig. 3, but in contrast to this already completes this
shaped sieve. Profile bars 1, sieve strips 2 and
Nicht ausdrücklich dargestellt sind solche Maßnahmen, mit denen an den Kontaktflächen zusätzliche Verbindungen durch Löten, Kleben oder Schweißen hergestellt werden. Die Maßnahmen selbst sind dem Fachmann an sich bekannt. Dadurch läßt sich in schwierigen Anwendungsfällen die Festigkeit des Siebes weiter erhöhen.Such measures are not expressly shown with those on the contact surfaces additional connections can be made by soldering, gluing or welding. The Measures themselves are known to the person skilled in the art. This allows in difficult applications further increase the strength of the sieve.
Das im Vorstehenden beschriebene Sieb eignet sich insbesonders zum Aufbau eines
Sichters zum Sortieren von Papierstoffsuspensionen.
Dabei wechseln sich
- in Umfangsrichtung gesehen Siebstreifen (2) mit Profilstäben (1) ab.
- Die Siebstreifen (2) weisen eine Vielzahl von Sortieröffnungen (7) auf und die Profilstäbe (1) ragen über die angeströmte Flache der Siebstreifen (2) hinaus.
This changes
- seen in the circumferential direction from sieve strips (2) with profile bars (1).
- The sieve strips (2) have a multiplicity of sorting openings (7) and the profiled bars (1) protrude beyond the surface of the sieve strips (2) against which they flow.
Claims (21)
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marked by
its use to build a classifier for sorting pulp suspension, wherein
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19635189 | 1996-08-30 | ||
DE19635189A DE19635189C2 (en) | 1996-08-30 | 1996-08-30 | Process for the production of sieves |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0837178A1 true EP0837178A1 (en) | 1998-04-22 |
EP0837178B1 EP0837178B1 (en) | 2001-12-19 |
Family
ID=7804182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97114817A Expired - Lifetime EP0837178B1 (en) | 1996-08-30 | 1997-08-27 | Process for making screens and screen obtained by this method |
Country Status (5)
Country | Link |
---|---|
US (1) | US6092286A (en) |
EP (1) | EP0837178B1 (en) |
AT (1) | ATE211194T1 (en) |
DE (2) | DE19635189C2 (en) |
ES (1) | ES2170309T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408773B (en) * | 2000-02-03 | 2002-03-25 | Andritz Ag Maschf | SCREEN AND METHOD FOR PRODUCING SUCH A SCREEN |
DE10052715A1 (en) * | 2000-10-24 | 2002-05-02 | Fiedler Heinrich Gmbh | slotted screen |
DE10148192A1 (en) * | 2001-09-28 | 2003-04-17 | Fiedler Heinrich Gmbh | slotted screen |
CN108348961A (en) * | 2015-06-30 | 2018-07-31 | 欧盛腾集团公司 | Rotary screen screen holding device |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19836316C2 (en) * | 1998-08-11 | 2000-06-15 | Voith Sulzer Papiertech Patent | Process for the production of curved sieves |
US7125491B2 (en) * | 2000-02-03 | 2006-10-24 | Andritz Ag | Screen and process for manufacturing a screen of this kind |
FR2809029B1 (en) * | 2000-05-16 | 2002-06-21 | Johnson Filtration Systems | METHOD FOR MANUFACTURING A MECHANICAL FILTRATION BASKET |
DE10217926A1 (en) * | 2002-04-23 | 2003-11-13 | Voith Paper Patent Gmbh | Process for wet screening of fiber suspensions |
DE10258324B4 (en) * | 2002-12-13 | 2008-03-27 | Voith Patent Gmbh | Process for the production of sets for the milling of hydrous paper pulp |
CN101171390B (en) * | 2005-05-09 | 2011-04-13 | 纺织过滤材料股份有限公司 | Screen basket and screen basket assembling method |
TW200736458A (en) * | 2006-03-24 | 2007-10-01 | Slit And Hole Industry Co Ltd | A sieve (screen) can prevent sieve bars from falling off |
DE102006030892A1 (en) * | 2006-07-04 | 2008-01-10 | Voith Patent Gmbh | Method of making sieves and sieve made thereby |
EP2222916B1 (en) * | 2007-11-14 | 2015-06-24 | Kadant Canada Corp. | Screen basket |
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 |
DE102009015405A1 (en) * | 2009-03-27 | 2010-09-30 | Voith Patent Gmbh | scree |
DE102011003096A1 (en) | 2011-01-25 | 2012-07-26 | Voith Patent Gmbh | Screening apparatus for treating fibrous material suspension used in paper making industry, has wire holder which are provided several ring layers that are connected with each other |
US9023456B2 (en) | 2011-03-18 | 2015-05-05 | Bilfinger Water Technologies, Inc. | Profiled wire screen for process flow and other applications |
Citations (3)
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US2423442A (en) * | 1945-02-28 | 1947-07-08 | Nat Lead Co | Drum screen |
US2588533A (en) * | 1946-11-29 | 1952-03-11 | Johnson Victor | Paper pulp screen plates and support means for the same |
EP0417408A1 (en) * | 1989-08-23 | 1991-03-20 | J.M. Voith GmbH | Process for making a screen drum and screen drum made according to the process |
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DE3307916A1 (en) * | 1983-03-05 | 1984-09-06 | Hein, Lehmann AG, 4000 Düsseldorf | SCREEN COVER WITH INTERCHANGEABLE SCREEN ELEMENTS |
DE3425485A1 (en) * | 1984-07-11 | 1986-01-16 | Hein, Lehmann AG, 4000 Düsseldorf | SCREENING |
FR2612081B1 (en) * | 1987-03-13 | 1991-02-08 | Lamort E & M | IMPROVEMENT IN SCREENS FOR PURIFIER AND THEIR MANUFACTURE |
DE3816152A1 (en) * | 1987-11-14 | 1989-11-23 | Voith Gmbh J M | SCREEN BASKET AND METHOD FOR THE PRODUCTION THEREOF |
US5047148A (en) * | 1990-04-24 | 1991-09-10 | Koichi Arai | Retained wire filter element |
DE4121896A1 (en) * | 1991-07-02 | 1993-01-07 | Fiedler Heinrich Gmbh | SCREEN ELEMENT |
DE4303892C2 (en) * | 1993-02-10 | 2001-07-12 | Ludwig Krieger Draht Und Kunst | Screen covering |
SE501110C2 (en) * | 1993-04-21 | 1994-11-14 | Kvaerner Pulping Tech | Screening means with a screen body and method and apparatus for the screen body manufacture |
US5387340A (en) * | 1993-07-15 | 1995-02-07 | Ackerman; Carl D. | Wire filter element and method of manufacture |
CA2111147A1 (en) * | 1993-12-13 | 1995-06-14 | Jacques Riendeau | Method of manufacturing a screen cylinder and a screen cylinder produced by the method |
US5394600A (en) * | 1994-02-14 | 1995-03-07 | Chen; Chao-Ho | Method for making a screen |
US5513757A (en) * | 1994-06-02 | 1996-05-07 | Sulzer Papertec Mansfield Inc. | Continuous cut slotted screen basket |
DE4435538C2 (en) * | 1994-10-05 | 1996-10-02 | Voith Gmbh J M | Process for the production of a flat screen |
-
1996
- 1996-08-30 DE DE19635189A patent/DE19635189C2/en not_active Expired - Fee Related
-
1997
- 1997-08-27 DE DE59705868T patent/DE59705868D1/en not_active Expired - Lifetime
- 1997-08-27 EP EP97114817A patent/EP0837178B1/en not_active Expired - Lifetime
- 1997-08-27 AT AT97114817T patent/ATE211194T1/en active
- 1997-08-27 ES ES97114817T patent/ES2170309T3/en not_active Expired - Lifetime
- 1997-08-29 US US08/921,090 patent/US6092286A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US2423442A (en) * | 1945-02-28 | 1947-07-08 | Nat Lead Co | Drum screen |
US2588533A (en) * | 1946-11-29 | 1952-03-11 | Johnson Victor | Paper pulp screen plates and support means for the same |
EP0417408A1 (en) * | 1989-08-23 | 1991-03-20 | J.M. Voith GmbH | Process for making a screen drum and screen drum made according to the process |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408773B (en) * | 2000-02-03 | 2002-03-25 | Andritz Ag Maschf | SCREEN AND METHOD FOR PRODUCING SUCH A SCREEN |
DE10052715A1 (en) * | 2000-10-24 | 2002-05-02 | Fiedler Heinrich Gmbh | slotted screen |
DE10148192A1 (en) * | 2001-09-28 | 2003-04-17 | Fiedler Heinrich Gmbh | slotted screen |
CN108348961A (en) * | 2015-06-30 | 2018-07-31 | 欧盛腾集团公司 | Rotary screen screen holding device |
Also Published As
Publication number | Publication date |
---|---|
DE59705868D1 (en) | 2002-01-31 |
ATE211194T1 (en) | 2002-01-15 |
DE19635189C2 (en) | 1999-01-28 |
US6092286A (en) | 2000-07-25 |
EP0837178B1 (en) | 2001-12-19 |
DE19635189A1 (en) | 1998-03-05 |
ES2170309T3 (en) | 2002-08-01 |
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