DE10247166A1 - Process to make paper sorting sieve with three parallel rods separated by narrow gap and transposed and tensioned in position prior to welding - Google Patents
Process to make paper sorting sieve with three parallel rods separated by narrow gap and transposed and tensioned in position prior to welding Download PDFInfo
- Publication number
- DE10247166A1 DE10247166A1 DE10247166A DE10247166A DE10247166A1 DE 10247166 A1 DE10247166 A1 DE 10247166A1 DE 10247166 A DE10247166 A DE 10247166A DE 10247166 A DE10247166 A DE 10247166A DE 10247166 A1 DE10247166 A1 DE 10247166A1
- Authority
- DE
- Germany
- Prior art keywords
- profile bars
- rod
- rod holder
- profile
- holders
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003466 welding Methods 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims 3
- 230000037431 insertion Effects 0.000 claims 3
- 230000008719 thickening Effects 0.000 claims 1
- 238000012216 screening Methods 0.000 description 13
- 239000000835 fiber Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 4
- 206010010774 Constipation Diseases 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B07B1/46—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/445—Bar 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
- B07B1/12—Apparatus having only parallel elements
-
- 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
-
- 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
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a Procedure according to the generic term of claim 1.
Ein bekanntes Beispiel für den Einsatz von Siebvorrichtungen, die nach dem Verfahren dieser Art herstellbar sind, ist das Sortieren von Faserstoffsuspensionen, wie es in Drucksortierern der papiererzeugenden Industrie durchgeführt wird. Dabei sollen die in der Suspension enthaltenen Fasern durch das Sieb hindurchtreten, während die nicht gewünschten festen Bestandteile an dem Spalt abgewiesen und aus der Siebvorrichtung wieder herausgeleitet werden. Dadurch, dass die Öffnungen eine im Wesentlichen längliche Form haben, also Schlitze oder Spalten sind, werden faserige Teilchen leichter durchgelassen als die kubischen, auch wenn beide Arten in ähnlicher Größenordnung vorliegen sollten. Mit einer derartigen Sortiertechnologie ist daher ein sehr guter Ausscheidungseffekt von nicht faserigen Störstoffen aus Faserstoffsuspensionen möglich. Denkbar ist auch ein Einsatz zur Trennung unterschiedlicher Faserbestandteile, der sogenannten Faserfraktionierung. Voraussetzung ist allerdings eine hohe Präzision der Schlitzform auf der ganzen Siebfläche. Bei hohen Anforderungen werden zumeist zylindrische Siebvorrichtungen, sogenannte Siebkörbe, verwendet.A well-known example of use of screening devices that can be produced by the method of this type are sorting pulp suspensions, as is the case in pressure sorters in the paper producing industry. The should fibers contained in the suspension pass through the sieve, while the unwanted ones solid components rejected at the gap and from the screening device be led out again. By making the openings one essentially elongated Having a shape, i.e. slits or gaps, becomes fibrous particles let through more easily than the cubic, even if both types in a similar way Magnitude should be available. With such sorting technology is therefore a very good excretion effect of non-fibrous contaminants possible from fiber suspensions. Conceivable is also an application for the separation of different fiber components, the so-called fiber fractionation. However, a prerequisite is high precision the slot shape on the entire screen surface. For high demands mostly cylindrical sieve devices, so-called sieve baskets, are used.
Ein Verfahren, um solche Siebkörbe herzustellen,
zeigt die
Siebe oder Siebkörbe mit guten Festigkeiten und
hoher Oberflächengüte können nach
einem Verfahren hergestellt werden, das in der
Aus der Offenlegungsschrift
Der Erfindung liegt die Aufgabe zu Grunde, ein Verfahren zu schaffen, mit dem Siebvorrichtungen wirtschaftlich noch günstiger herstellbar sind. Es soll für verschiedene Formen der Siebvorrichtungen verwendbar sein, insbesondere auch für Flachsiebe und Siebkörbe mit radial außen liegenden Stäben.The invention is based on the object Reason to create a process with which screening devices are economical even cheaper are producible. It is meant for different forms of the screening devices can be used, in particular also for Flat sieves and sieve baskets with radially outside lying bars.
Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Maßnahmen erfüllt.This task is performed by the in the indicator of claim 1 measures mentioned Fulfills.
In Unteransprüchen sind vorteilhafte Ausgestaltungen des Verfahrens beschrieben.Advantageous refinements are in the subclaims described the procedure.
Mit Hilfe der Erfindung können Siebvorrichtungen relativ einfach hergestellt werden. Profilstäbe und Stabhalter lassen sich nämlich zunächst spannungsfrei vormontieren, wozu spezielle Montagevorrichtungen sinnvoll sind, da es sich normalerweise um Serienfabrikation handelt. Anschließend werden dann die eingesetzten Profilstäbe durch die Relativbewegung von benachbarten Stabhaltern verklemmt, ohne dass die normalerweise bei solchen Siebvorrichtungen erforderliche Präzision verloren geht.With the help of the invention, screening devices are relatively easy to manufacture. Profile bars and bar holders can be namely first pre-assemble without tension, for which purpose special assembly devices are sensible, since it is usually serial production. Subsequently then the profile bars used by the relative movement jammed by adjacent rod holders without the normally required precision is lost in such screening devices.
Das ist darauf zurückzuführen, dass größere Verformungen der Stabhalter nicht unbedingt erforderlich sind, sondern dass bereits durch kleine Bewegungswege, die z.B. geringer als 1 mm sein können, ein sehr fester Sitz aller Stäbe in den entsprechenden Aussparungen möglich ist. Die Stabhalter können also schon die Form haben, wie sie bei der fertigen Siebvorrichtung vorgesehen ist. Lediglich in den Aussparungen, bzw. an den Klemmstellen der Profilstäbe können – müssen aber nicht – elastische Verformungen durchgeführt werden. Solche Verformungen haben allerdings den Vorteil, dass eventuelle Restspalte, die sich eventuell z.B. auf Grund von Fertigungstoleranzen zwischen den eingesetzten Stabfüßen und den Aussparungen gebildet haben, bereits durch eine geringfügige plastische Verformung weitgehend geschlossen werden. Nachdem Profilstäbe und Stabhalter in der beschriebenen Weise verspannt worden sind, können benachbarte Stabhalter z.B. durch Punktschweißen miteinander verbunden werden. Punktschweißen hat den Vorteil, dass das Material der Stabhalter nur partiell und unwesentlich erhitzt wird. Auch sind solche Punktschweißungen sehr leicht von Automaten durchzuführen. Das schließt aber nicht aus, dass auch andere Befestigungsverfahren, z.B. unter Verwendung von Verstärkungstücken, die angeschweißt oder angeschraubt werden, möglich sind. Eventuell ist es wünschenswert, diese Befestigung lösbar zu machen, wozu sich Schraubverbindungen besonders anbieten.This is due to the fact that larger deformations of the rod holders are not absolutely necessary, but that even small movement paths, which can be less than 1 mm, for example, allow all rods to be seated very firmly in the corresponding recesses. The rod holder can therefore already have the shape as it is provided in the finished screening device. Only in the recesses or at the clamping points of the profile bars can - but not - elastic deformations be carried out. Such deformations have the advantage, however, that any residual gaps that may have formed between the rod feet used and the recesses, for example due to manufacturing tolerances, are largely closed by a slight plastic deformation. After profile bars and bar holders have been clamped in the manner described, adjacent bar holders can be connected to one another, for example by spot welding. Spot welding has the advantage that the material of the rod holder is only partially and insignificantly heated becomes. Such spot welds are also very easy to perform by automatic machines. However, this does not exclude that other fastening methods are also possible, for example using reinforcement pieces that are welded or screwed on. It may be desirable to make this fastening detachable, for which screw connections are particularly suitable.
Siebvorrichtungen, die nach diesem Verfahren hergestellt worden sind, werden bevorzugt in Drucksortierern eingesetzt. Um sie von Verstopfungen frei zu halten, sind zumeist Räumen erforderlich, die in geringerem Abstand an der Siebfläche vorbeibewegt werden und die hydraulische Impulse erzeugen. Siebvorrichtungen für den Einsatz in Drucksortierern enthalten in der Regel an ihren Enden Befestigungsflansche o.ä. Diese können sehr leicht mit entsprechend positionierten Stabhaltern verbunden sein, z.B. derart, dass jeweils zwei Stabhalter an den Enden einer solchen Siebvorrichtung auch als Befestigungsmittel der fertigen Siebvorrichtung dienen.Screening devices after this Processes that have been produced are preferred in pressure sorters used. To keep them free from constipation, most are clear required, which moves past the screen surface at a closer distance and generate the hydraulic impulses. screening devices for the Use in pressure sorters usually contain at their ends Mounting flanges or similar these can be very easily connected to appropriately positioned rod holders, e.g. such that two rod holders at the ends of each Screening device also as a fastening means of the finished screening device serve.
Die Erfindung wird erläutert an Hand von Zeichnungen; dabei zeigen:The invention is explained in Hand of drawings; show:
Der Ausschnitt in
Um Klemmkräfte von ausreichender Höhe auf Dauer
zu erhalten, werden die benachbarten Stabhalter einer Gruppe miteinander
fest verbunden. Sie können
z.B. durch Punktschweißen
fixiert sein, wie
Bei der
Normalerweise sind solche Siebkörbe an ihren axialen Enden mit Flanschen oder sonstigen Befestigungsmitteln versehen, damit sie im Drucksortierer befestigt werden können. Diese sind hier nicht dargestellt.Typically, such strainers are on theirs Provide axial ends with flanges or other fasteners, so that they can be fixed in the pressure sorter. These are not shown here.
In
In dieser
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10247166A DE10247166A1 (en) | 2002-10-10 | 2002-10-10 | Process to make paper sorting sieve with three parallel rods separated by narrow gap and transposed and tensioned in position prior to welding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10247166A DE10247166A1 (en) | 2002-10-10 | 2002-10-10 | Process to make paper sorting sieve with three parallel rods separated by narrow gap and transposed and tensioned in position prior to welding |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10247166A1 true DE10247166A1 (en) | 2004-04-22 |
Family
ID=32038422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10247166A Withdrawn DE10247166A1 (en) | 2002-10-10 | 2002-10-10 | Process to make paper sorting sieve with three parallel rods separated by narrow gap and transposed and tensioned in position prior to welding |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10247166A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2222916B1 (en) | 2007-11-14 | 2015-06-24 | Kadant Canada Corp. | Screen basket |
WO2019145080A1 (en) * | 2018-01-25 | 2019-08-01 | Voith Patent Gmbh | Screening cylinder |
-
2002
- 2002-10-10 DE DE10247166A patent/DE10247166A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2222916B1 (en) | 2007-11-14 | 2015-06-24 | Kadant Canada Corp. | Screen basket |
WO2019145080A1 (en) * | 2018-01-25 | 2019-08-01 | Voith Patent Gmbh | Screening cylinder |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: VOITH PATENT GMBH, 89522 HEIDENHEIM, DE |
|
8139 | Disposal/non-payment of the annual fee |