EP2962773A1 - Plastic screen lining for a screening machine for classifying in particular fine-grained material to be screened - Google Patents
Plastic screen lining for a screening machine for classifying in particular fine-grained material to be screened Download PDFInfo
- Publication number
- EP2962773A1 EP2962773A1 EP15156712.0A EP15156712A EP2962773A1 EP 2962773 A1 EP2962773 A1 EP 2962773A1 EP 15156712 A EP15156712 A EP 15156712A EP 2962773 A1 EP2962773 A1 EP 2962773A1
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- EP
- European Patent Office
- Prior art keywords
- covering according
- mesh
- plastic screen
- screen covering
- sieve
- 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.)
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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
- B07B1/46—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
- B07B1/469—Perforated sheet-like material
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- 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
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- 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
- B07B1/4636—Regulation of screen apertures
-
- 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
- B07B1/4645—Screening surfaces built up of modular elements
Definitions
- the invention relates to a plastic screen covering for a screening machine for classifying in particular fine-grained bulk material, the screen mesh formed by longitudinal webs and transverse webs extending longitudinally or transversely to Siebarbeitstownsraum and each have both longitudinally and transversely a mirror-symmetrical shape.
- the invention also relates to a sieve machine comprising this plastic sieve covering with an electrically operated mechanical oscillating drive.
- the field of application of the invention extends to the screening of bulk material, which may be in the form of a dry solid or in a suspension.
- the solution according to the invention can also be used in the field of wet fine classification.
- Screen coverings of the type of interest here are usually not made of metal, but of plastic, in particular polyurethane, and have a plurality of openings, so-called sieve mesh through which the sieved bulk material falls through, whereas the relatively coarse-grained residue on the Sieboberseite remains.
- the Siebarbeitsterrorism in the form of a main back and shake the Siebbelags is performed by a known screening machine, in addition to the receiving box for the screenings usually an electrically operated mechanical vibration drive is mounted.
- the plastic sieve is interchangeable mounted in the area of the bottom of the sieve box.
- Kunststoffsiebbelag which is characterized by a precise screening and a long service life.
- the invention includes the technical teaching that the Siebmaschen the Kunststoffsiebbelags each viewed in the longitudinal direction have a narrow central region, the minimum width is smaller than the maximum width of both sides adjacent end regions.
- a specially shaped waisted screen mesh is proposed, which assumes an approximately rectangular mesh size only under load of Siebbelags.
- the sieve meshes pre-profiled according to the invention are most extensively widened under load of the plastic sieve covering during the sieving in the sieve plane at the narrow middle region having the minimum width, since the webs between the Siebmaschen are the weakest at this point.
- the two end regions are formed approximately semicircular in order to form no points of attack for damaging notch stresses.
- the minimum width in the center of the center area of the screen mesh can be indicated via a waisting angle, which extends between the longitudinal direction of the screen mesh and a mesh edge portion adjoining the end region and is between 0.4 and 15 degrees.
- a waisting angle which extends between the longitudinal direction of the screen mesh and a mesh edge portion adjoining the end region and is between 0.4 and 15 degrees.
- the minimum width of the sieve mesh is between 0.05 to 1 mm.
- the tuned length of the screen mesh should be in a range between 0.3 to 20mm.
- the Siebbelagdicke is in this preferred embodiment of the Kunststoffsiebbelags preferably in the range between 0.5 to 5mm, the sieve mesh in cross section preferably conically under a widening in the direction of diarrhea of the Siebguts Edge angle between 5 ° to 20 °. This edge angle prevents jamming of the screened material falling through in the screen mesh.
- reinforcement threads extend at least through part of the longitudinal webs and / or the transverse webs within the polyurethane material from a fibrous material which is preferably cast in here.
- a cross-sectional wedge-shaped, arcuate or polygonal raised polyurethane Materialanformung is arranged on the Siebober constitutional in the area along at least one reinforcing thread.
- a screen mesh arrangement it is proposed to arrange the screen meshes in series next to and above one another in order to form a regular grid structure.
- This lattice structure allows rectilinear longitudinal and transverse webs, which may be at least partially penetrated by reinforcing threads, in particular to maximize the strength of the Kunststoffsiebbelags.
- adjacent rows are arranged offset in the longitudinal direction one above the other arranged meshes.
- This embodiment leads to narrower nodes and thus to a better ratio between open screen area and web area, without impairing the functionality of the shape matching of the screen meshes under load.
- FIG. 1 a plastic sieve made of polyurethane in rows arranged side by side sieve meshes 1, which in both the longitudinal direction L and in the transverse direction Q have a mirror-symmetrical shape.
- the meshes 1 extend longitudinally to the Siebarbeitsschiscardi A, which is produced by a - not shown - screening machine.
- Reinforcement threads 2 ' are provided only in the longitudinal direction L of the Kunststoffsiebbelags.
- Rail-like material projections 3 are arranged along the reinforcing threads 2 'on the wire butt side.
- the rail-like Materialanformungen 3 have seen in cross section a wedge-shaped shape.
- the exemplary Siebmaschen 1a and 1b and 1c and 1d in the longitudinal direction L are arranged one above the other.
- the meshes 1a and 1c and 1b and 1d are arranged exactly next to one another.
- the row of wire meshes 1a and 1b is divided by the row of wire meshes 1c and 1d by longitudinal webs 4.
- adjacent Siebmaschen 1 a and 1 c and 1 b and 1 d are divided by transverse webs 5 from each other.
- a four-sided node K1 which is indicated here by a dashed circular line, is formed in each case in the crossing region of the longitudinal webs 4 with the transverse webs 5.
- Each screen mesh 1c (by way of example) has a narrow center region 6 in the longitudinal direction L, the minimum width B m of which is smaller than the maximum width B e of the mutually adjacent end regions 7a and 7b.
- the two end regions 7a and 7b of each sieve mesh 1c are semicircular in this embodiment.
- the waisting angle ⁇ between the longitudinal direction L of the screen mesh 1c and a mesh edge section 8 adjoining the end region 7a is approximately 10 °.
- the sectional view AA according to FIG. 6 illustrates that the sieve mesh 1c 'extends (exemplary) from the Sieboberseite to Siebunterseite conically widening at an edge angle ⁇ , in order to avoid jamming of sieved particles within the S iebmasche 1c'.
Abstract
Die Erfindung betrifft einen Kunststoffsiebbelag für eine Siebmaschine zum Klassieren von insbesondere feinkörnigem Siebgut, deren durch Längsstege (4) und Querstege (5) gebildeten Siebmaschen (1a; 1b; 1c; 1d) sich längs oder quer zur Siebarbeitsbewegungsrichtung (A) erstrecken und jeweils sowohl in Längsrichtung (L) als auch in Querrichtung (Q) eine spiegelsymmetrische Gestalt aufweisen, wobei die Siebmasche (1a; 1b; 1c; 1d) in Längsrichtung (L) einen schmalen Mittelbereich () aufweist, dessen minimale Breite (B m ) kleiner ist als die maximale Breite (B e ) der beidseits benachbarten Endbereiche (7a, 7b).The invention relates to a plastic screen covering for a screening machine for classifying, in particular, fine-grained screenings, the screen meshes (1a; 1b; 1c; 1d) formed by longitudinal webs (4) and transverse webs (5) extending longitudinally or transversely to the direction of wire movement movement (A) and both in the longitudinal direction (L) and in the transverse direction (Q) have a mirror-symmetrical shape, the Siebmasche (1a; 1b; 1c; 1d) in the longitudinal direction (L) has a narrow central region () whose minimum width (B m) is smaller as the maximum width (B e) of the adjacent end portions (7a, 7b).
Description
Die Erfindung betrifft einen Kunststoffsiebbelag für eine Siebmaschine zum Klassieren von insbesondere feinkörnigem Schüttgut, deren durch Längsstege und Querstege gebildeten Siebmaschen sich längs oder quer zur Siebarbeitsbewegungsrichtung erstrecken und jeweils sowohl in Längsrichtung als auch in Querrichtung eine spiegelsymmetrische Gestalt aufweisen. Daneben betrifft die Erfindung auch eine diesen Kunststoffsiebbelag umfassende Siebmaschine mit einem elektrisch betriebenen mechanischen Schwingantrieb.The invention relates to a plastic screen covering for a screening machine for classifying in particular fine-grained bulk material, the screen mesh formed by longitudinal webs and transverse webs extending longitudinally or transversely to Siebarbeitsbewegungsrichtung and each have both longitudinally and transversely a mirror-symmetrical shape. In addition, the invention also relates to a sieve machine comprising this plastic sieve covering with an electrically operated mechanical oscillating drive.
Das Einsatzgebiet der Erfindung erstreckt sich auf das Sieben von Schüttgut, das als trockener Feststoff oder in einer Suspension vorliegen kann. Insbesondere kann die erfindungsgemäße Lösung auch im Bereich der nassen Feinstklassierung eingesetzt werden. Siebbeläge der hier interessierenden Art bestehen üblicherweise nicht aus Metall, sondern aus Kunststoff, insbesondere Polyurethan, und weisen eine Vielzahl von Durchbrüche, sogenannte Siebmaschen auf, durch welche das gesiebte Schüttgut hindurch fällt, wogegen der relativ grobkörnigere Rückstand seitens der Sieboberseite verbleibt. Die Siebarbeitsbewegung in Form eines hauptsächlichen Hin- und Herrüttelns des Siebbelags wird von einer an sich bekannten Siebmaschine durchgeführt, neben deren Aufnahmekasten für das Siebgut gewöhnlich ein elektrisch betriebener mechanischer Schwingantrieb angebracht ist. Der Kunststoffsiebbelag ist auswechselbar im Bereich des Bodens des Siebkastens angebracht.The field of application of the invention extends to the screening of bulk material, which may be in the form of a dry solid or in a suspension. In particular, the solution according to the invention can also be used in the field of wet fine classification. Screen coverings of the type of interest here are usually not made of metal, but of plastic, in particular polyurethane, and have a plurality of openings, so-called sieve mesh through which the sieved bulk material falls through, whereas the relatively coarse-grained residue on the Sieboberseite remains. The Siebarbeitsbewegung in the form of a main back and shake the Siebbelags is performed by a known screening machine, in addition to the receiving box for the screenings usually an electrically operated mechanical vibration drive is mounted. The plastic sieve is interchangeable mounted in the area of the bottom of the sieve box.
Aus der
Im Siebbetrieb wird auf die rechteckigen Siebmaschen eine Belastung ausgeübt, so dass sich diese Ausbauchen und eine ovale Maschenform annehmen. Dies führt dazu, dass auch größere Partikel als gewünscht durch diese verformten Siebmaschen fallen können. Insbesondere bei kleinen Stegbreiten und hohen Verhältnissen zwischen Maschenlänge und Maschenbreite nimmt der Fehlkornanteil zu. Zudem entstehen in den rechtwinklig zulaufenden Ecken der rechteckigen Siebmaschen Kerbspannungen, welche zu Rißbildungen führen können, was einen vorzeitigen Verschleiß des Siebbelags verursacht.In sieve operation, a load is exerted on the rectangular sieve meshes so that these bulges and an oval mesh shape take on one another. As a result, even larger particles than desired can fall through these deformed meshes. Especially with small web widths and high ratios between mesh length and mesh width, the proportion of defective grain increases. In addition, notch stresses, which can lead to cracking, which causes premature wear of the Siebbelags arise in the right angles tapered corners of the rectangular Siebmaschen.
Es ist daher die Aufgabe der vorliegenden Erfindung einen Kunststoffsiebbelag zu schaffen, welcher sich durch eine präzise Siebung und eine lange Standzeit auszeichnet.It is therefore an object of the present invention to provide a Kunststoffsiebbelag, which is characterized by a precise screening and a long service life.
Die Aufgabe wird ausgehend von einem Siebbelag gemäß dem Oberbegriff von Anspruch 1 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Die nachfolgenden abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder.The object is achieved on the basis of a screen covering according to the preamble of claim 1 in conjunction with its characterizing features. The following dependent claims give advantageous developments of the invention.
Die Erfindung schließt die technische Lehre ein, dass die Siebmaschen des Kunststoffsiebbelags jeweils in Längsrichtung betrachtet einen schmalen Mittelbereich aufweisen, dessen minimale Breite kleiner ist als die maximale Breite der beidseits benachbarten Endbereiche.The invention includes the technical teaching that the Siebmaschen the Kunststoffsiebbelags each viewed in the longitudinal direction have a narrow central region, the minimum width is smaller than the maximum width of both sides adjacent end regions.
Mit anderen Worten wird eine speziell geformte taillierte Siebmasche vorgeschlagen, welche erst unter Belastung des Siebbelags eine in etwa rechteckige Maschenweite einnimmt. Die erfindungsgemäß vorprofilierten Siebmaschen werden unter Belastung des Kunststoffsiebbelags während des Siebens in der Siebebene an dem die minimale Breite aufweisenden schmalen Mittelbereich am stärksten aufgeweitet, da die Stege zwischen den Siebmaschen an dieser Stelle am schwächsten sind. Im beidseits des Mittelbereichs vorhandenen Endbereich der Siebmasche, der eine keulenförmige Erweiterung der Siebmaschen darstellt, befinden sich Kreuzungspunkte, welche sich unter Belastung weniger stark verformen, da im Kreuzungspunkt mehr Material vorhanden ist.In other words, a specially shaped waisted screen mesh is proposed, which assumes an approximately rectangular mesh size only under load of Siebbelags. The sieve meshes pre-profiled according to the invention are most extensively widened under load of the plastic sieve covering during the sieving in the sieve plane at the narrow middle region having the minimum width, since the webs between the Siebmaschen are the weakest at this point. In existing on both sides of the central region end of the Siebmasche, which represents a club-shaped extension of Siebmaschen, there are crossing points, which deform less under load, since more material is present at the intersection.
Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Siebmasche sind die beiden Endbereiche in etwa halbkreisförmig ausgebildet, um keine Angriffstellen für schädigende Kerbspannungen zu bilden. Daneben ist es auch möglich, die Endbereiche bogenförmig oder als aufeinandertreffende Kantenabschnitte mit abgerundeten Ecken auszubilden, um denselben Vorteil zu erzielen.According to a preferred embodiment of the sieve mesh according to the invention, the two end regions are formed approximately semicircular in order to form no points of attack for damaging notch stresses. In addition, it is also possible to form the end regions arcuate or as meeting edge portions with rounded corners in order to achieve the same advantage.
Die minimale Breite im Zentrum des Mittelbereichs der Siebmasche lässt sich über einen Taillierungswinkel angeben, welcher zwischen der Längsrichtung der Siebmasche und einem am Endbereich angrenzenden Maschenkantenabschnitt verläuft und zwischen 0,4 bis 15 Grad beträgt. In diesem Winkelbereich wird je nach Materialeigenschaften, Siebbelagdicke und Maschengröße ein optimales Verhältnis zwischen der maximalen Breite im Endbereich der Siebmasche und der minimale Breite im zentralen Mittelbereich der Siebmasche erzielt, welches zwischen 1,1 bis 2,5 liegt.The minimum width in the center of the center area of the screen mesh can be indicated via a waisting angle, which extends between the longitudinal direction of the screen mesh and a mesh edge portion adjoining the end region and is between 0.4 and 15 degrees. Depending on the material properties, screen cover thickness and mesh size, an optimum ratio between the maximum width in the end region of the screen mesh and the minimum width in the central middle region of the screen mesh, which lies between 1.1 and 2.5, is achieved in this angular range.
Insbesondere für das Sieben im Feinkornbereich beträgt gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Kunststoffsiebbelag die minimale Breite der Siebmasche zwischen 0,05 bis 1mm. Die hierauf abgestimmte Länge der Siebmasche sollte in einem Bereich zwischen 0,3 bis 20mm liegen.In particular, for sieving in the fine grain range, according to a preferred embodiment of the plastic sieve lining according to the invention, the minimum width of the sieve mesh is between 0.05 to 1 mm. The tuned length of the screen mesh should be in a range between 0.3 to 20mm.
Die Siebbelagdicke liegt bei dieser bevorzugten Ausführungsform des Kunststoffsiebbelags vorzugsweise im Bereich zwischen 0,5 bis 5mm, wobei die Siebmasche im Querschnitt vorzugsweise konisch unter einen sich im in Durchfallrichtung des Siebguts erweiternden Kantenwinkel zwischen 5° bis 20° verläuft. Dieser Kantenwinkel verhindert ein Verklemmen des hindurch fallenden Siebguts in der Siebmasche.The Siebbelagdicke is in this preferred embodiment of the Kunststoffsiebbelags preferably in the range between 0.5 to 5mm, the sieve mesh in cross section preferably conically under a widening in the direction of diarrhea of the Siebguts Edge angle between 5 ° to 20 °. This edge angle prevents jamming of the screened material falling through in the screen mesh.
Gemäß einer weiteren die Erfindung verbessernden Maßnahme wird vorgeschlagen, dass zumindest durch einen Teil der Längsstege und/oder der Querstege innerhalb des Polyurethanmaterials Verstärkungsfäden aus einem Fasermaterial verlaufen die vorzugsweise hierin eingegossen sind.According to a further measure improving the invention, it is proposed that reinforcement threads extend at least through part of the longitudinal webs and / or the transverse webs within the polyurethane material from a fibrous material which is preferably cast in here.
Zum Leiten des Siebguts während des Siebvorganges wird zudem vorgeschlagen, dass vorzugsweise an der Sieboberfläche im Bereich entlang mindestens eines Verstärkungsfadens eine im Querschnitt keilförmige, bogenförmige oder polygonale erhabene Polyurethan-Materialanformung angeordnet ist. Diese sich insoweit zueinander parallel längs über den Kunststoffsiebbelag erstreckenden schienenartigen Materialanformungen leiten das Siebgut über das Siebbelag.For directing the Siebguts during the screening process is also proposed that preferably a cross-sectional wedge-shaped, arcuate or polygonal raised polyurethane Materialanformung is arranged on the Sieboberfläche in the area along at least one reinforcing thread. These in this respect parallel to each other along the plastic screen covering extending rail-like Materialanformungen lead the screenings on the screen covering.
Gemäß einer ersten Ausführungsform für eine Siebmaschenanordnung wird vorgeschlagen, die Siebmaschen in Reihe neben- und übereinander anzuordnen, um eine regelmäßige Gitterstruktur zu bilden. Diese Gitterstruktur ermöglicht geradlinig verlaufende Längs- und Querstege, welche zumindest teilweise auch von Verstärkungsfäden durchzogen sein können, um insbesondere die Festigkeit des Kunststoffsiebbelags zu maximieren.According to a first embodiment of a screen mesh arrangement, it is proposed to arrange the screen meshes in series next to and above one another in order to form a regular grid structure. This lattice structure allows rectilinear longitudinal and transverse webs, which may be at least partially penetrated by reinforcing threads, in particular to maximize the strength of the Kunststoffsiebbelags.
Gemäß einer alternativen Ausführungsform hierzu wird vorgeschlagen, dass benachbarte Reihen in Längsrichtung übereinander angeordneter Siebmaschen versetzt zueinander angeordnet sind. Diese Ausführungsform führt zu schmaleren Knotenpunkten und somit zu einem besseren Verhältnis zwischen offener Siebfläche und Stegfläche, ohne die Funktionalität der Formanpassung der Siebmaschen unter Belastung zu beeinträchtigen.According to an alternative embodiment, it is proposed that adjacent rows are arranged offset in the longitudinal direction one above the other arranged meshes. This embodiment leads to narrower nodes and thus to a better ratio between open screen area and web area, without impairing the functionality of the shape matching of the screen meshes under load.
Mit der erfindungsgemäßen Lösung kann trotz der feinen Strukturen des Siebbelags eine hohe Präzision des Trennschnitts erreicht werden. Insbesondere wirkt sich dieser Vorteil bei faserverstärkten Polyurethansieben aus, die auf Grund ihrer flachen Bauform geringe Stegquerschnitte aufweisen.With the solution according to the invention, a high precision of the separating cut can be achieved despite the fine structures of the screen lining. In particular, this advantage has an effect on fiber-reinforced polyurethane screens which, due to their flat design, have small web cross-sections.
Weitere die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung bevorzugter Ausführungsbeispiele der Erfindung anhand der Figuren näher dargestellt. Es zeigen:
- Figur 1
- eine schematische perspektivische Ansicht eines Kunststoffsiebbelags in einer ersten Ausführungsform,
Figur 2- eine schematische perspektivische Ansicht eines Kunststoffsiebbelags in einer zweiten Ausführungsform,
- Figur 3
- eine schematische Daraufsicht einer Auswahl von Siebmaschen im Ausgangszustand gemäß einer ersten Ausführungsform,
Figur 4- eine schematische Daraufsicht einer Auswahl von Siebmaschen im Belastungszustand gemäß der ersten Ausführungsform,
Figur 5- eine schematische Daraufsicht einer Auswahl von Siebmaschen im Ausgangszustand gemäß einer zweiten Ausführungsform und
Figur 6- eine Detaildarstellung im Schnitt A-A einer Siebmasche aus
.Figur 5
- FIG. 1
- a schematic perspective view of a Kunststoffsiebbelags in a first embodiment,
- FIG. 2
- a schematic perspective view of a Kunststoffsiebbelags in a second embodiment,
- FIG. 3
- 1 is a schematic plan view of a selection of screen meshes in the initial state according to a first embodiment,
- FIG. 4
- FIG. 2 is a schematic plan view of a selection of strained meshes in the loaded state according to the first embodiment; FIG.
- FIG. 5
- a schematic top view of a selection of Siebmaschen in the initial state according to a second embodiment and
- FIG. 6
- a detailed representation in section AA of a sieve mesh
FIG. 5 ,
Gemäß
Zur Verstärkung des Kunststoffsiebbelags erstrecken sich in Längsrichtung L sowie auch in Querrichtung Q mehrere parallel zueinander angeordnete Verstärkungsfäden 2 aus einem Fasermaterial durch den Kunststoffsiebbelag. Die Verstärkungsfäden 2 verlaufen dabei innerhalb des Stegbereichs neben den Siebmaschen 1.To reinforce the Kunststoffsiebbelags extending in the longitudinal direction L as well as in the transverse direction Q a plurality of mutually parallel reinforcing
Nach dem alternativen Ausführungsbeispiel gemäß
Nach der in
Die Reihe der Siebmaschen 1a und 1b wird von der Reihe der Siebmaschen 1c und 1d durch Längsstege 4 geteilt. Jeweils nebeneinanderliegende Siebmaschen 1a und 1c sowie 1b und 1d werden durch Querstege 5 voneinander geteilt. Durch die hierdurch geschaffene regelmäßige Gitterstruktur der Maschenanordnung entsteht im Kreuzungsbereich der Längsstege 4 mit den Querstegen 5 jeweils ein vierseitiger Knotenpunkt K1, der hier durch eine gestrichelte Kreislinie angedeutet ist.The row of wire meshes 1a and 1b is divided by the row of wire meshes 1c and 1d by
Jede Siebmasche 1c (exemplarisch) weist in Längsrichtung L einen schmalen Mittelbereich 6 auf, dessen minimale Breite Bm kleiner als die maximale Breite Be der beidseits benachbarten Endbereiche 7a und 7b ist. Die beiden Endbereiche 7a und 7b jeder Siebmasche 1c sind in diesem Ausführungsbeispiel halbkreisförmig ausgebildet. Der Taillierungswinkel α zwischen der Längsrichtung L der Siebmasche 1c und einem am Endbereich 7a angrenzenden Maschenkantenabschnitt 8 beträgt ca. 10°.Each
Gemäß
Bei dem in
Die Schnittdarstellung A-A gemäß
Die Erfindung ist nicht beschränkt auf die beiden vorstehend beschriebenen Ausführungsbeispiele. Es sind vielmehr auch Abwandlungen hiervon denkbar, welche vom Schutzbereich der nachfolgenden Ansprüche mit umfasst sind. So ist es beispielsweise auch möglich, Verstärkungsfäden 2 lediglich in Längsrichtung L oder in Querrichtung Q und durch mehrere Siebmaschen beabstandet voneinander zu integrieren. Die schienenförmigen Materialanformungen 3 können dabei Materialverstärkungen im Bereich hindurch geführter Verstärkungsfäden 2 bilden.The invention is not limited to the two embodiments described above. On the contrary, modifications are conceivable which are included within the scope of the following claims. That's the way it is, for example possible to integrate reinforcing
- 11
- Siebmaschescreen mesh
- 22
- Verstärkungsfadenreinforcing thread
- 33
- Materialanformungmaterial accumulation
- 44
- Längssteglongitudinal web
- 55
- Querstegcrosspiece
- 66
- Mittelbereichthe central region
- 77
- Endbereichend
- 88th
- MaschenkantenabschnittMesh edge portion
- LL
- Längsrichtunglongitudinal direction
- Querrichtungtransversely
- AA
- SiebarbeitsbewegungsrichtungSiebarbeitsbewegungsrichtung
- Bm B m
- minimale Breiteminimum width
- Be B e
- maximale Breitemaximum width
- αα
- TaillierungswinkelTaillierungswinkel
- ββ
- Kantenwinkeledge angle
- K1K1
- Knotenpunkt, vierseitigNode, four sided
- K2K2
- Knotenpunkt, dreiseitigNode, three-sided
Claims (14)
dadurch gekennzeichnet, dass die Siebmasche (1a; 1b; 1c; 1d) in Längsrichtung (L) einen schmalen Mittelbereich (6) aufweist, dessen minimale Breite (Bm) kleiner ist als die maximale Breite (Be) der beidseits benachbarten Endbereiche (7a, 7b).Plastic sieve covering for a screening machine for classifying in particular fine-grained sieve material, the sieve meshes (1) formed by longitudinal webs (4) and transverse webs (5) extend longitudinally or transversely to the sieve working movement direction (A) and in each case both in the longitudinal direction (L) and in the transverse direction ( Q) have a mirror-symmetrical shape,
characterized in that the screen mesh (1a; 1b; 1c; 1d) in the longitudinal direction (L) has a narrow center region (6) whose minimum width (B m ) is smaller than the maximum width (B e ) of the adjacent end regions ( 7a, 7b).
dadurch gekennzeichnet, dass die Siebmasche (1a; 1b; 1c; 1d) durch elastische Verformung unter Arbeitsbelastung eine im Wesentlichen rechteckförmige Grundgestalt annimmt, bei welcher sich das Maß der Breite (Bm) im Mittelbereich (6) an das Maß der Breite (Be) der beiden Endbereiche (7a, 7b) annähert.Plastic screen covering according to claim 1,
characterized in that the sieve mesh (1a; 1b; 1c; 1d) assumes a substantially rectangular basic shape by elastic deformation under working load, in which the dimension of the width (B m ) in the middle region (6) matches the dimension of the width (B e ) approaches the two end regions (7a, 7b).
dadurch gekennzeichnet, dass die beiden Endbereiche (7a, 7b) der Siebmasche halbkreisförmig, bogenförmig oder mit abgerundeten Ecken aufeinandertreffender Kantenabschnitte ausgebildet sind.Plastic screen covering according to claim 1,
characterized in that the two end regions (7a, 7b) of the Siebmasche are semicircular, arcuate or with rounded corners aufeinandreffender edge portions are formed.
dadurch gekennzeichnet, dass der Taillierungswinkel (α) zwischen der Längsrichtung (L) der Siebmasche (1a; 1b; 1c; 1d) und einem am Endbereich (7a; 7b) angrenzenden Maschenkantenabschnitt (8) zwischen 0,4 bis 15° beträgt, um die minimale Breite (Bm) im Zentrum des Mittelbereichs (6) der Siebmasche (1a; 1b; 1c; 1d) zu erzeugen.Plastic screen covering according to claim 1,
characterized in that the waist angle (α) between the longitudinal direction (L) of the mesh (1a; 1b; 1c; 1d) and a mesh edge portion (8) adjacent the end region (7a; 7b) is between 0.4 and 15 ° to produce the minimum width (B m ) at the center of the central region (6) of the mesh (1a; 1b; 1c; 1d).
dadurch gekennzeichnet, dass das Verhältnis zwischen maximaler Breite (Be) und minimaler Breite (Bm) der Siebmaschen (1a; 1b; 1c; 1d) im Bereich zwischen 1,1 bis 2,5 liegt.Plastic screen covering according to claim 1,
characterized in that the ratio between maximum width (B e ) and minimum width (B m ) of the screen meshes (1a; 1b; 1c; 1d) is in the range of 1.1 to 2.5.
dadurch gekennzeichnet, dass die minimale Breite (Bm) der Siebmasche (1a; 1b; 1c; 1d) zwischen 0,05 bis 1 mm beträgt, und dass die Länge der Siebmasche (1a; 1b; 1c; 1d) im Bereich zwischen 0,3 bis 20 mm liegt.Plastic screen covering according to claim 1,
characterized in that the minimum width (B m ) of the mesh (1a; 1b; 1c; 1d) is between 0.05 to 1 mm, and that the length of the mesh (1a; 1b; 1c; 1d) is in the range between 0 , 3 to 20 mm.
dadurch gekennzeichnet, dass die Siebbelagdicke im Bereich zwischen 0,5 bis 5 mm liegt.Plastic screen covering according to claim 1,
characterized in that the Siebbelagdicke is in the range between 0.5 to 5 mm.
dadurch gekennzeichnet, dass die Siebmasche (1a; 1b; 1c; 1d) im Querschnitt konisch unter einen sich in Durchfallrichtung des Siebguts erweiternden Kantenwinkel (β) zwischen 5° bis 20° verläuft.Plastic screen covering according to claim 1,
characterized in that the sieve mesh (1a; 1b; 1c; 1d) is conical in cross-section and extends between 5 ° to 20 ° under an edge angle (β) which widens in the direction of passage of the screened material.
dadurch gekennzeichnet, dass die durch die Längsstege (4) und Querstege (5) gebildete Siebstruktur aus einem Polyurethanmaterial hergestellt ist.Plastic screen covering according to claim 1,
characterized in that the screen structure formed by the longitudinal webs (4) and transverse webs (5) is made of a polyurethane material.
dadurch gekennzeichnet, dass zumindest durch einen Teil der Längsstege (4) und/oder Querstege (5) innerhalb des Polyurethanmaterials Verstärkungsfäden (2) aus einem Fasermaterial verlaufen.Plastic screen covering according to claim 1,
characterized in that extend at least by a part of the longitudinal webs (4) and / or transverse webs (5) within the polyurethane material reinforcing threads (2) made of a fiber material.
dadurch gekennzeichnet, dass an der Sieboberseite im Bereich entlang mindestens eines Verstärkungsfadens (2) eine im Querschnitt keilförmige, bogenförmige oder polygonale Materialanformung (3) angeordnet ist.Plastic screen covering according to claim 1,
characterized in that arranged on the Sieboberseite in the region along at least one reinforcing thread (2) has a wedge-shaped in cross-section, arcuate or polygonal Materialanformung (3).
dadurch gekennzeichnet, dass die Siebmaschen (1a; 1b; 1c; 1d) in Reihe neben- und übereinander angeordnet sind, um eine regelmäßige Gitterstruktur zu bilden.Plastic screen covering according to claim 1,
characterized in that the sieve meshes (1a; 1b; 1c; 1d) are arranged side by side and one above the other in series to form a regular lattice structure.
dadurch gekennzeichnet, dass benachbarte Reihen in Längsrichtung (L) übereinander angeordneter Siebmaschen (1a; 1b; 1c; 1d) versetzt zueinander angeordnet sind.Plastic screen covering according to claim 1,
characterized in that adjacent rows in the longitudinal direction (L) of sieve meshes (1a, 1b, 1c, 1d) arranged one above the other are offset relative to one another.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102014009702.1A DE102014009702B3 (en) | 2014-07-02 | 2014-07-02 | Plastic screen covering for a screening machine for classifying in particular fine-grained bulk material |
Publications (2)
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EP2962773A1 true EP2962773A1 (en) | 2016-01-06 |
EP2962773B1 EP2962773B1 (en) | 2019-01-30 |
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EP15156712.0A Active EP2962773B1 (en) | 2014-07-02 | 2015-02-26 | Plastic screen lining for a screening machine for classifying in particular fine-grained material to be screened |
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DE (1) | DE102014009702B3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11446704B2 (en) | 2012-05-25 | 2022-09-20 | Derrick Corporation | Injection molded screening apparatuses and methods |
CN115193701A (en) * | 2022-07-12 | 2022-10-18 | 中国铁建重工集团股份有限公司 | Scraper conveyor capable of adjusting particle size for screening |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104520021B (en) | 2012-05-25 | 2018-12-18 | 德里克公司 | The sieve apparatus and method of injection molding |
US11161150B2 (en) | 2012-05-25 | 2021-11-02 | Derrick Corporation | Injection molded screening apparatuses and methods |
US9409209B2 (en) | 2012-05-25 | 2016-08-09 | Derrick Corporation | Injection molded screening apparatuses and methods |
BR112019022586B1 (en) | 2017-04-28 | 2022-03-22 | Derrick Corporation | Screening elements, manufacturing methods and thermoplastic compositions thereof |
US11505638B2 (en) | 2017-04-28 | 2022-11-22 | Derrick Corporation | Thermoplastic compositions, methods, apparatus, and uses |
US11213856B2 (en) | 2017-06-06 | 2022-01-04 | Derrick Corporation | Method and apparatuses for screening |
US11213857B2 (en) | 2017-06-06 | 2022-01-04 | Derrick Corporation | Method and apparatus for screening |
DE102017115908B3 (en) | 2017-07-14 | 2018-07-12 | Rhewum Gmbh | Screen covering for classifying dry or wet screenings and screen applications based thereon |
EP3727710A1 (en) * | 2017-12-21 | 2020-10-28 | Derrick Corporation | Injection molded screening apparatuses and methods |
EA039521B1 (en) * | 2018-04-27 | 2022-02-07 | Деррик Корпорейшн | Injection molded screening apparatuses and methods |
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DE3842041A1 (en) * | 1988-09-29 | 1989-08-10 | Screenex Wire Weaving Mfg Ltd | SCREEN ELEMENT |
US4857176A (en) | 1986-08-04 | 1989-08-15 | Derrick Manufacturing Corporation | Reinforced molded polyurethane vibratory screen |
US20130126397A1 (en) * | 2010-05-21 | 2013-05-23 | Arobindo Ghosh | Screen panel |
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AT19449B (en) * | 1904-01-13 | 1905-03-10 | Konrad Fischer | Sorting plate with elongated slots at the ends. |
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2014
- 2014-07-02 DE DE102014009702.1A patent/DE102014009702B3/en active Active
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2015
- 2015-02-26 EP EP15156712.0A patent/EP2962773B1/en active Active
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NL278883A (en) * | ||||
US4857176A (en) | 1986-08-04 | 1989-08-15 | Derrick Manufacturing Corporation | Reinforced molded polyurethane vibratory screen |
DE3842041A1 (en) * | 1988-09-29 | 1989-08-10 | Screenex Wire Weaving Mfg Ltd | SCREEN ELEMENT |
US20130126397A1 (en) * | 2010-05-21 | 2013-05-23 | Arobindo Ghosh | Screen panel |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11446704B2 (en) | 2012-05-25 | 2022-09-20 | Derrick Corporation | Injection molded screening apparatuses and methods |
US11471913B2 (en) | 2012-05-25 | 2022-10-18 | Derrick Corporation | Injection molded screening apparatuses and methods |
CN115193701A (en) * | 2022-07-12 | 2022-10-18 | 中国铁建重工集团股份有限公司 | Scraper conveyor capable of adjusting particle size for screening |
Also Published As
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EP2962773B1 (en) | 2019-01-30 |
DE102014009702B3 (en) | 2015-08-06 |
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