EP2060329B1 - Screen device and mounting devices for screening sheets - Google Patents

Screen device and mounting devices for screening sheets Download PDF

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Publication number
EP2060329B1
EP2060329B1 EP07022426A EP07022426A EP2060329B1 EP 2060329 B1 EP2060329 B1 EP 2060329B1 EP 07022426 A EP07022426 A EP 07022426A EP 07022426 A EP07022426 A EP 07022426A EP 2060329 B1 EP2060329 B1 EP 2060329B1
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EP
European Patent Office
Prior art keywords
screen
force
screening
tensioning element
screening device
Prior art date
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EP07022426A
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German (de)
French (fr)
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EP2060329A1 (en
Inventor
Peter Schiffer
Mario Fritz
Egon Tiefnig
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Individual
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Publication date
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Priority to DE502007003539T priority Critical patent/DE502007003539D1/en
Priority to AT07022426T priority patent/ATE464954T1/en
Priority to ES07022426T priority patent/ES2340723T3/en
Priority to EP07022426A priority patent/EP2060329B1/en
Priority to PCT/EP2008/009718 priority patent/WO2009065544A1/en
Priority to US12/741,949 priority patent/US8387904B2/en
Publication of EP2060329A1 publication Critical patent/EP2060329A1/en
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Publication of EP2060329B1 publication Critical patent/EP2060329B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/145—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • 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
    • B07B1/20—Stationary drums with moving interior agitators
    • 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
    • B07B1/48—Stretching devices for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B02C2023/165—Screen denying egress of oversize material
    • 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
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces
    • 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

Definitions

  • the present invention relates to a screening device for a comminution device, through which comminuted components are discharged, and in particular to fastening means for attaching screen plates to screen cassettes.
  • a central element of a conventional crusher is a rotor unit comprising a rotor provided with knives, e.g. B. can be provided with concave ground Rundschneidkronen equipped.
  • the knives are attached, for example, by screwing on knife carriers, which are welded in knife pockets or z. B. can be screwed, which are milled into the rotor.
  • the comminution of the discontinued material takes place between the blades rotating with the rotor and stationary counter-blades (stator measurer, scraper combs).
  • the material is discharged through a sieve device.
  • This screening device determines the comminution factor in accordance with the size of the screen (eg 5 to 150 mm).
  • the shredded material that has passed through the sieve is conveyed by means of a conveyor belt, a transport screw, a chain conveyor or an extraction system, etc.
  • the screening device typically includes screen plates which are bolted at the ends to a portafilter (a screen cassette) or machine housing are. For secure attachment of the screen plates on the portafilter or the housing ia a plurality of screws is necessary.
  • the U.S. -A- 4,824,034 discloses a screen plate for a shredder, which is connectable to cylindrical elements with a screening device.
  • the US Pat. No. 2,225,781 discloses a crusher with rotor and rotor blades and a cylindrical screen.
  • the glands are exposed during operation of the crusher heavy stresses, and thus the bearing surfaces of the screw must be as parallel as possible to prevent loosening or breakage of the fittings and consequently severe damage to the entire shredding device during operation as possible.
  • the parallelism of the contact surfaces of the screw surfaces can only be achieved if the screen cassette and the screen plates are manufactured with very small tolerances. As a result, the production of these components is very expensive.
  • the tightening torques must be strictly adhered to when connecting the screen plates with screws, so that the assembly can be made only by appropriately trained personnel.
  • the above object is achieved by fastening means for fastening a screen plate to a filter holder of a screening device for a crushing device solved according to claim 1.
  • the screening device comprises in particular the portafilter and a number of screen plates.
  • the fastening means comprise a first tensioning element connected to the screening device, in particular the portafilter, and adapted to exert a force on the screen plate; a second tensioning element which is connected to the screening device, in particular the portafilter, is connected, and which is adapted to exert a force on the screen plate; wherein at least one of the clamping elements is an elastic element which is adapted to exert on the screen plate an elastic restoring force.
  • said first clamping element is a mechanical clamping part which is adapted to exert a force parallel to an edge of the screen plate
  • the second clamping element is an elastic element, in particular a spring element which is adapted to an elastic restoring force parallel to the To exert edge of the screen plate in response to the force exerted by the first clamping element force.
  • the clamping element can serve both to clamp the screen plate at one end thereof to the portafilter and to exert a force on this end of the screen plate which is directed substantially in the direction of the opposite end of the screen plate. It can, for. B. a device for receiving the screen plate (a screen cassette) serve as a clamping element.
  • the screen plate is thus fastened without screwing to the portafilter by the forces applied by the first and second tensioning elements.
  • the claimed fasteners are advantageous in that the attachment of the screen plate (sieve) is less susceptible to vibration than in the prior art ie the attachment is more reliable.
  • a fastened with the claimed fasteners screen plate can be easily replaced without much time after wear in the course of operation of the crushing device by a new.
  • an elastic tensioning element which exerts the elastic force for example a spring restoring force
  • Both the first and the second clamping element can exert a compressive force or a tensile force on the screen plate, ie the clamping of the screen plate can be done by pressing on opposite edges or pulling on these.
  • the screen plate is thus set either under tensile or shear stress.
  • the elastic tensioning element may in particular be a spring element or at least comprise such a spring element.
  • the spring element may be a well-known in the art compression spring, a leaf spring, coil spring or a rubber element o. ⁇ . Be.
  • the use of such a spring element for applying the elastic restoring force for clamping fastening the screen plate is inexpensive, practical and allows a reliable attachment of the screen plate to the portafilter.
  • the screening device is i.a. be provided so that it surrounds the rotor of a crushing device partially along the rotor axis.
  • the tension of the screen plate by applying forces by the clamping elements only in the direction along the rotor axis preferably but in a direction perpendicular to the rotor axis, in particular parallel to a narrow side of a rectangular screen plate, take place.
  • the present invention further provides a screening device for a crushing device comprising the above-described attachment means.
  • a screen plate for a screen device for a crushing device comprising a first member adapted to be engaged with a first biasing member of the screen device and comprising a second member is provided thereto is configured to be in engagement with a second clamping element of the screening device, such that the screen plate between the first and the second clamping element can be tensioned, provided.
  • the first and second elements of the screening device may be integrally formed therewith, and both elements may be provided in the form of protrusions, protrusions, grooves, ridges, etc.
  • the present invention further provides a comminution device for comminuting material components comprising at least one rotor with rotor measuring device mounted thereon, at least one stator knife; at least one screening device; and the fasteners described above.
  • the comminution device comprises, in addition to the at least one rotor with rotor knives mounted thereon and the at least one stator knife, at least one screening device which comprises the fastening means described above and / or the screen plate which comprises a first element which is adapted to a first Clamping element of the screening device to be engaged, and which comprises a second element which is adapted to be in engagement with a second clamping element of the screening device, such that the screen plate between the first and the second clamping element can be tensioned.
  • the above object is also achieved by a method for attaching a screen plate to a filter holder of a screening device for a crushing device according to claim 4.
  • the claimed method includes the step of clamping of the screen plate in or on the filter holder between a first and a second clamping element, such that at least one of the clamping elements exerts an elastic restoring force on the screen plate.
  • the tensioning of the screen plate thus happens by means of the elastic restoring force which exerts at least one of the clamping elements.
  • this tension member has a restoring force in response to a force acting thereon, which is then applied to the screen plate.
  • the clamping of the screen plate can be carried out such that by the first clamping element, a force parallel to an edge of the screen plate, for example by abutment of the screen plate on the housing, and exerted by the second clamping element an elastic restoring force parallel to the edge of the screen plate in response is exerted on the force exerted by the first clamping element force.
  • the fin-curvilinear screen plate is clamped in or on the finely curved portafilter so that the force from the first tension element and the force from the second tension element are exerted parallel to the curved surface of the curved screen plate.
  • the filter holder and thus the screening device can thus have a substantially ellipsoidal part shape, for example the shape of a part of a cylinder or cylinder jacket or a ball or a ball shell, and thus have a finite curvature.
  • a force of the first and / or second clamping element along the curvature and senkechtcht act to the longitudinal axis of the partially surrounded by the sieve rotor of a crushing device.
  • FIG. 1 illustrates an example of fastening means for a screen plate, wherein the fastening means comprise a clamping part and a compression spring element.
  • screen plate and “screen” are used interchangeably in this application and the term “screen plate” is intended in particular to express no restriction of the material of the screen.
  • screen cassette and “portafilter” are used interchangeably and the term “screen cassette” is not intended to express any geometric or other limitation on the neutral term of the carrier.
  • a shredder shown in section includes a screen 1 which partially surrounds a rotor 2 (which rotates counterclockwise in the example shown).
  • a stator blade 3 At the upper right end of the screening device 1 is a stator blade 3, which comminuted in cooperation with the mounted on the rotor 2 rotating blades 4 discontinued material.
  • a screen plate 5 of a specific perforation (various shapes, eg a honeycomb shape are possible here) is fastened to a portafilter 6 by means of a clamping part 7 and a compression spring element 8.
  • the screening device may comprise a plurality of screen plates, for example with a sieve size of 5 to 150 mm. It is understood that in various embodiments, a fixed or movable part of the housing can take over the function of the clamping part 7.
  • the clamping member 7 exerts a force F on a projection or a projection 9, which may be formed integrally with the screen plate 5 or otherwise firmly connected thereto.
  • a force F in the peripheral direction (circumferential direction) in the clockwise direction along the screen plate 5 is exerted by the clamping member 7.
  • the size of the force may, depending on the specific application for a particular type of shredder, z. B. by screw adjustment of the clamping part 7, can be adjusted.
  • the screen plate 5 is by the clamping member 7 via a further projection (a projection) 10 of the screen plate against a compression spring element 8, z. B. pressed a cold-formed spring made of stainless steel.
  • a rubber plate may replace the stainless steel compression spring.
  • the spring body can be cylindrical, rectangular, conical, double-conical, barrel-shaped, etc. Spiral flat springs as well as turn and thigh springs can be used.
  • An abutment projection 11 of the screening device 1, e.g. is formed on the screen cassette 6 (the portafilter), the pressure exerted by the clamping part 7 and transmitted from the compression spring element 8 force F increases.
  • the screen plate is thus stretched with finite curvature. It can be easily solved by operating the clamping part 7.
  • the attachment of the screen plate against vibration and similar stress during operation by the provision of the compression spring is relatively insensitive.
  • the fastening means according to the invention for fastening screen plates to screen cassettes can advantageously be used both in single-shaft and multi-shaft shredders.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Screen Printers (AREA)
  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Catching Or Destruction (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The fixing material has a tensioning element which is connected with a screen unit (1), particularly a screen carrier (6) and is formed to exert force on a screen plate (5). Another tensioning element is connected with the screen unit, particularly the screen carrier and is also formed to exert force on the screen plate. One of the tensioning elements is an elastic element that is formed to exert an elastic restoring force on the screen plate. Independent claims are included for the following: (1) a method for fixing a screen plate at a screen carrier of a screen unit for a crushing device; and (2) a crushing device for crushing material components.

Description

Gebiet der ErfindungField of the invention

Die vorliegende Erfindung betrifft eine Siebeinrichtung für eine Zerkleinerungsvorrichtung, durch welche zerkleinerte Komponenten ausgetragen werden, und insbesondere Befestigungsmittel zur Befestigung von Siebblechen an Siebkassetten.The present invention relates to a screening device for a comminution device, through which comminuted components are discharged, and in particular to fastening means for attaching screen plates to screen cassettes.

Stand der TechnikState of the art

Gewerbeabfall, Industrieabfall, Hausabfall etc., z.B. (Hart-)Kunststoff, Textilien, Verbundstoffe, Reifen, Gummi oder Althölzer (wie Paletten und Spanplatten), bedürfen vor ihrer endgültigen Entsorgung oder insbesondere vor der Rückführung in den Wertstoffkreislauf der Zerkleinerung in entsprechenden Zerkleinerungsvorrichtungen.Commercial waste, industrial waste, household waste, etc., e.g. (Hard) plastic, textiles, composites, tires, rubber or waste wood (such as pallets and chipboard), require crushing in appropriate shredding devices before their final disposal or in particular before returning to the recycling cycle.

Ein zentrales Element eines herkömmlichen Zerkleinerers stellt eine Rotoreinheit dar, welche einen Rotor umfasst, der mit Messern, die z. B. mit konkav geschliffenen Rundschneidkronen versehen sein können, bestückt ist. Die Messer sind beispielsweise durch Verschrauben an Messerträgern befestigt, die in Messertaschen eingeschweißt sind oder z. B. angeschraubt sein können, welche in den Rotor gefräst sind. Die Zerkleinerung des aufgegebenen Materials erfolgt zwischen den mit dem Rotor rotierenden Messern und stationären Gegenmessem (Statormessem, Abstreifkämmen).A central element of a conventional crusher is a rotor unit comprising a rotor provided with knives, e.g. B. can be provided with concave ground Rundschneidkronen equipped. The knives are attached, for example, by screwing on knife carriers, which are welded in knife pockets or z. B. can be screwed, which are milled into the rotor. The comminution of the discontinued material takes place between the blades rotating with the rotor and stationary counter-blades (stator measurer, scraper combs).

Nach der Zerkleinerung zwischen den rotierenden Messern und den Statormessern wird das Material durch eine Siebeinrichtung ausgetragen. Diese Siebeinrichtung bestimmt den Zerkleinerungsfaktor nach Maßgabe der Siebgröße (z. B. 5 bis 150 mm). Das durch das Sieb gelangte zerkleinerte Material wird mithilfe eines Transportbandes, einer Transportschnecke, eines Kettenförderers oder einer Absauganlage usw. weiterbefördert. Die Siebeinrichtung enthält typischer Weise Siebbleche, die an den Enden mit einem Siebträger (einer Siebkassette) oder mit einem Maschinengehäuse verschraubt sind. Zur sicheren Befestigung der Siebbleche an dem Siebträger oder dem Gehäuse ist i.a. eine Mehrzahl von Schrauben notwendig.After comminution between the rotating knives and the stator knives, the material is discharged through a sieve device. This screening device determines the comminution factor in accordance with the size of the screen (eg 5 to 150 mm). The shredded material that has passed through the sieve is conveyed by means of a conveyor belt, a transport screw, a chain conveyor or an extraction system, etc. The screening device typically includes screen plates which are bolted at the ends to a portafilter (a screen cassette) or machine housing are. For secure attachment of the screen plates on the portafilter or the housing ia a plurality of screws is necessary.

In der US -A- 5 485 924 wird ein Zentrifugalsichter beschrieben, an dem mit Hilfe von Klemmelementen ein Sieb angebracht ist (siehe Spalte 2 Zeile 52 bis Spalte 3, Zeile 37). Das Sieb wird mit Hilfe eines deformierbaren Flanches fixiert.In the U.S. -A- 5,485,924 A centrifugal separator is described in which a sieve is attached by means of clamping elements (see column 2 row 52 to column 3, row 37). The sieve is fixed by means of a deformable flange.

Die US -A- 4 824 034 offenbart ein Siebblech für einen Schredder, welcher an zylinderförmigen Elementen mit einer Siebeinrichtung verbindbar ist.The U.S. -A- 4,824,034 discloses a screen plate for a shredder, which is connectable to cylindrical elements with a screening device.

Die US -A- 2 225 781 offenbart eine Zerkleinerungsvorrichtung mit Rotor und Rotormessern und einer zylindrischen Siebeinrichtung.The US Pat. No. 2,225,781 discloses a crusher with rotor and rotor blades and a cylindrical screen.

Die Verschraubungen sind im Betrieb des Zerkleinerers starken Beanspruchungen ausgesetzt, und somit müssen die Auflageflächen der Schraubflächen möglichst parallel zueinander sein, um ein Lösen oder einen Bruch der Verschraubungen und infolgedessen schwere Beschädigungen der gesamten Zerkleinerungsvorrichtung im Betrieb möglichst zu verhindern. Die Parallelität der Auflageflächen der Schraubflächen lässt sich nur erreichen, wenn die Siebkassette und die Siebbleche mit sehr geringen Toleranzen gefertigt werden. Dadurch ist die Herstellung dieser Komponenten sehr kostspielig. Zudem müssen die Anzugsdrehmomente bei der Verbindung der Siebbleche mit Schrauben genau eingehalten werden, so dass die Montage ausschließlich durch entsprechend geschultes Fachpersonal vorgenommen werden kann.The glands are exposed during operation of the crusher heavy stresses, and thus the bearing surfaces of the screw must be as parallel as possible to prevent loosening or breakage of the fittings and consequently severe damage to the entire shredding device during operation as possible. The parallelism of the contact surfaces of the screw surfaces can only be achieved if the screen cassette and the screen plates are manufactured with very small tolerances. As a result, the production of these components is very expensive. In addition, the tightening torques must be strictly adhered to when connecting the screen plates with screws, so that the assembly can be made only by appropriately trained personnel.

Ein weiterer Nachteil der Schraubbefestigung der Siebbleche in dem Stand der Technik besteht darin, dass die Verschraubungen teilweise nur sehr schwer zugänglich sind. So lassen sich einige Verschraubungen z. B. nur dadurch erreichen, dass eine Wartungsperson in eine Abfördereinrichtung unterhalb des Zerkleinerers steigt, die das durch die Siebbleche durchgehende zerkleinerte Material weitertransportiert. Weil die Siebbleche einem Verschleiß unterliegen und somit regelmäßig zu warten sind, müssen die eventuell schwer zugänglichen Verschraubungen in regelmäßigen zeitlichen Abständen sehr zeitaufwändig von einer Wartungsperson gelöst und ersetzt werden.Another disadvantage of the screw fastening the screen plates in the prior art is that the glands are sometimes very difficult to access. Thus, some glands z. B. only achieve that a maintenance person rises in a discharge device below the crusher, which transports the shredded material passing through the screen plates. Because the screen plates are subject to wear and thus have to be maintained regularly, the possibly difficult to access screw connections must be solved and replaced at regular time intervals very time consuming by a maintenance person.

Da die Stillstandzeit des Zerkleinerers aus ökonomischen Gründen minimiert werden sollte, ist es wünschenswert, eine Befestigungsmöglichkeit für Siebbleche an einem Siebträger einer Siebeinrichtung für einen Zerkleinerer zur Verfügung zu stellen, die eine einfachere und schnellere Wartung, insbesondere eine vereinfachte Demontage abgenutzter Siebbleche und Montage neuer Siebbleche, ermöglicht.Since the standstill time of the crusher should be minimized for economic reasons, it is desirable to provide a mounting option for screen plates on a filter holder of a screening device for a crusher, the simpler and faster maintenance, in particular a simplified disassembly of worn screen plates and mounting new screen plates , allows.

Beschreibung der ErfindungDescription of the invention

Die oben gestellte Aufgabe wird durch Befestigungsmittel zur Befestigung eines Siebblechs an einem Siebträger einer Siebeinrichtung für eine Zerkleinerungsvorrichtung gemäß Anspruch 1 gelöst. Die Siebeinrichtung umfasst insbesondere den Siebträger und eine Anzahl von Siebblechen. Die Befestigungsmittel umfassen
ein erstes Spannelement, das mit der Siebeinrichtung, insbesondere dem Siebträger, verbunden ist, und das dazu ausgebildet ist, eine Kraft auf das Siebblech auszuüben;
ein zweites Spannelement, das mit der Siebeinrichtung, insbesondere dem Siebträger,
verbunden ist, und das dazu ausgebildet ist, eine Kraft auf das Siebblech auszuüben;
wobei zumindest eines der Spannelemente ein elastisches Element ist, das dazu ausgebildet ist, auf das Siebblech eine elastische Rückstellkraft auszuüben.The above object is achieved by fastening means for fastening a screen plate to a filter holder of a screening device for a crushing device solved according to claim 1. The screening device comprises in particular the portafilter and a number of screen plates. The fastening means comprise
a first tensioning element connected to the screening device, in particular the portafilter, and adapted to exert a force on the screen plate;
a second tensioning element which is connected to the screening device, in particular the portafilter,
is connected, and which is adapted to exert a force on the screen plate;
wherein at least one of the clamping elements is an elastic element which is adapted to exert on the screen plate an elastic restoring force.

Dabei ist das genannte erste Spannelement ein mechanisches Klemmteil, das dazu ausgebildet ist, eine Kraft parallel zu einer Kante des Siebbleches auszuüben, und es ist das zweite Spannelement ein elastisches Element, insbesondere ein Federelement, das dazu ausgebildet ist, eine elastische Rückstellkraft parallel zu der Kante des Siebbleches in Reaktion auf die von dem ersten Spannelement ausgeübte Kraft auszuüben.In this case, said first clamping element is a mechanical clamping part which is adapted to exert a force parallel to an edge of the screen plate, and it is the second clamping element is an elastic element, in particular a spring element which is adapted to an elastic restoring force parallel to the To exert edge of the screen plate in response to the force exerted by the first clamping element force.

Das Klemmelement kann dazu dienen, sowohl das Siebblech an einem Ende desselben an den Siebträger zu klemmen als auch dazu, eine Kraft auf dieses Ende des Siebblechs auszuüben, die im wesentlichen in Richtung des gegenüberliegenden Endes des Siebblechs gerichtet ist. Es kann z. B. eine Vorrichtung zur Aufnahme des Siebbleches (eine Siebkassette) als Klemmelement dienen.The clamping element can serve both to clamp the screen plate at one end thereof to the portafilter and to exert a force on this end of the screen plate which is directed substantially in the direction of the opposite end of the screen plate. It can, for. B. a device for receiving the screen plate (a screen cassette) serve as a clamping element.

Das Siebblech wird somit ohne Verschraubung an dem Siebträger durch die von dem ersten und zweiten Spannelement angelegten Kräfte befestigt. Dadurch, dass zumindest eines der Spannelemente eine elastische Rückstellkraft ausübt (auf eine einwirkende Kraft also durch Ausüben einer Reaktionskraft reagiert), sind die beanspruchten Befestigungsmittel dahingehend vorteilhaft, dass die Befestigung des Siebblechs (Siebes) weniger anfällig gegen Vibrationen ist als in dem Stand der Technik, d.h. die Befestigung ist zuverlässiger.The screen plate is thus fastened without screwing to the portafilter by the forces applied by the first and second tensioning elements. Characterized in that at least one of the clamping elements exerts an elastic restoring force (that reacts to an applied force by exerting a reaction force), the claimed fasteners are advantageous in that the attachment of the screen plate (sieve) is less susceptible to vibration than in the prior art ie the attachment is more reliable.

Zudem kann ein mit den beanspruchten Befestigungsmitteln befestigtes Siebblech leicht und ohne großen Zeitaufwand nach Abnutzung im Laufe des Betriebs der Zerkleinerungsvorrichtung durch ein neues ersetzt werden. Des weiteren erlaubt das Bereitstellen eines elastischen Spannelements, das die elastische Kraft (beispielsweise eine Federrückstellkraft) ausübt, größere Fertigungstoleranzen der einzelnen Komponenten der Siebeinrichtung, da Varianzen in der Fertigung durch entsprechendes Einstellen des elastischen Spannelements (der elastischen Rückstellkraft) kompensiert werden können.In addition, a fastened with the claimed fasteners screen plate can be easily replaced without much time after wear in the course of operation of the crushing device by a new. Furthermore, the provision of an elastic tensioning element which exerts the elastic force (for example a spring restoring force) allows greater manufacturing tolerances of the individual components of the screening device, since variances in production can be compensated by corresponding adjustment of the elastic tensioning element (the elastic restoring force).

Sowohl das erste als auch das zweit Spannelement kann eine Druckkraft oder eine Zugkraft auf das Siebblech ausüben, d.h. das Spannen des Siebblechs kann durch Drücken auf gegenüberliegende Kanten oder Ziehen an diesen erfolgen. Das Siebblech wird also entweder unter Zug- oder Schubspannung gesetzt.Both the first and the second clamping element can exert a compressive force or a tensile force on the screen plate, ie the clamping of the screen plate can be done by pressing on opposite edges or pulling on these. The screen plate is thus set either under tensile or shear stress.

Das elastische Spannelement kann insbesondere ein Federelement sein oder zumindest ein solches umfassen. Das Federelement kann eine in dem Stand der Technik wohlbekannte Druckfeder, eine Blattfeder, Spiralfeder oder auch ein Gummielement o. ä. sein. Die Verwendung eines solchen Federelements zum Aufbringen der elastischen Rückstellkraft zum Spannbefestigen des Siebblechs ist kostengünstig, praktikabel und erlaubt eine zuverlässige Befestigung des Siebblechs an dem Siebträger.The elastic tensioning element may in particular be a spring element or at least comprise such a spring element. The spring element may be a well-known in the art compression spring, a leaf spring, coil spring or a rubber element o. Ä. Be. The use of such a spring element for applying the elastic restoring force for clamping fastening the screen plate is inexpensive, practical and allows a reliable attachment of the screen plate to the portafilter.

Die Siebeinrichtung wird i.a. so vorgesehen sein, dass sie den Rotor einer Zerkleinerungsvorrichtung teilweise entlang der Rotorachse umgibt. Prinzipiell kann die Spannung des Siebblechs durch Anlegen von Kräften durch die Spannelemente lediglich in Richtung entlang der Rotorlängsachse bevorzugt aber in einer Richtung senkrecht zu der Rotorlängsachse, insbesondere parallel zu einer Schmalseite eines rechteckigen Siebblechs, erfolgen.The screening device is i.a. be provided so that it surrounds the rotor of a crushing device partially along the rotor axis. In principle, the tension of the screen plate by applying forces by the clamping elements only in the direction along the rotor axis preferably but in a direction perpendicular to the rotor axis, in particular parallel to a narrow side of a rectangular screen plate, take place.

Die vorliegende Erfindung stellt des Weiteren eine Siebeinrichtung für eine Zerkleinerungsvorrichtung zur Verfügung, welche die oben beschriebenen Befestigungsmittel umfasst.The present invention further provides a screening device for a crushing device comprising the above-described attachment means.

Auch wird ein Siebblech für eine Siebeinrichtung für eine Zerkleinerungsvorrichtung, das ein erstes Element umfasst, das dazu ausgebildet ist, mit einem ersten Spannelement der Siebeinrichtung in Eingriff zu stehen, und das ein zweites Element umfasst, das dazu ausgebildet ist, mit einem zweiten Spannelement der Siebeinrichtung in Eingriff zu stehen, derart dass das Siebblech zwischen dem ersten und dem zweiten Spannelement gespannt werden kann, zur Verfügung gestellt. Das erste und zweite Element der Siebeinrichtung können integral mit derselben ausgebildet sein, und beide Elemente können in Form von Auskragungen, Vorsprüngen, Nuten, Graten, usw. vorgesehen werden.Also, a screen plate for a screen device for a crushing device comprising a first member adapted to be engaged with a first biasing member of the screen device and comprising a second member is provided thereto is configured to be in engagement with a second clamping element of the screening device, such that the screen plate between the first and the second clamping element can be tensioned, provided. The first and second elements of the screening device may be integrally formed therewith, and both elements may be provided in the form of protrusions, protrusions, grooves, ridges, etc.

Des weiteren kann hierbei unter Eingriff auch lediglich verstanden werden, dass das erste (zweite) Element des Siebblechs mit dem ersten (zweiten) Spannelement der Siebeinrichtung in Anschlag steht, dieses Element mithin an das Spannelement anstößt.Furthermore, this can also be understood by intervention only that the first (second) element of the screen plate with the first (second) clamping element of the screening device is in abutment, this element thus abuts the clamping element.

Die vorliegende Erfindung stellt weiterhin eine Zerkleinerungsvorrichtung zur Zerkleinerung von Materialkomponenten zur Verfügung, die umfasst
zumindest einen Rotor mit darauf angebrachten Rotormessem,
zumindest ein Statormesser;
zumindest eine Siebeinrichtung; und
die Befestigungsmittel, die oben beschrieben wurden.The present invention further provides a comminution device for comminuting material components comprising
at least one rotor with rotor measuring device mounted thereon,
at least one stator knife;
at least one screening device; and
the fasteners described above.

Gemäß einer Weiterbildung umfasst die Zerkleinerungsvorrichtung neben dem zumindest einen Rotor mit darauf angebrachten Rotormessern und dem zumindest einen Statormesser zumindest eine Siebeinrichtung, welche die oben beschriebenen Befestigungsmittel umfasst und/oder das Siebblech, das ein erstes Element umfasst, das dazu ausgebildet ist, mit einem ersten Spannelement der Siebeinrichtung in Eingriff zu stehen, und das ein zweites Element umfasst, das dazu ausgebildet ist, mit einem zweiten Spannelement der Siebeinrichtung in Eingriff zu stehen, derart dass das Siebblech zwischen dem ersten und dem zweiten Spannelement gespannt werden kann.According to a development, the comminution device comprises, in addition to the at least one rotor with rotor knives mounted thereon and the at least one stator knife, at least one screening device which comprises the fastening means described above and / or the screen plate which comprises a first element which is adapted to a first Clamping element of the screening device to be engaged, and which comprises a second element which is adapted to be in engagement with a second clamping element of the screening device, such that the screen plate between the first and the second clamping element can be tensioned.

Die oben gestellte Aufgabe wird ebenso durch ein Verfahren zum Befestigen eines Siebblechs an einem Siebträger einer Siebeinrichtung für eine Zerkleinerungsvorrichtung gemäß Anspruch 4 gelöst. Das beanspruchte Verfahren umfasst den Schritt des Einspannens des Siebblechs in oder an dem Siebträger zwischen einem ersten und einem zweiten Spannelement, derart dass zumindest eines der Spannelemente eine elastische Rückstellkraft auf das Siebblech ausübt. Das Spannen des Siebblechs geschieht also mithilfe der elastischen Rückstellkraft, die zumindest eines der Spannelemente ausübt. Genauer weist dieses Spannelement eine Rückstellkraft in Reaktion auf eine auf dasselbe wirkende Kraft auf, die dann an dem Siebblech angelegt wird.The above object is also achieved by a method for attaching a screen plate to a filter holder of a screening device for a crushing device according to claim 4. The claimed method includes the step of clamping of the screen plate in or on the filter holder between a first and a second clamping element, such that at least one of the clamping elements exerts an elastic restoring force on the screen plate. The tensioning of the screen plate thus happens by means of the elastic restoring force which exerts at least one of the clamping elements. Specifically, this tension member has a restoring force in response to a force acting thereon, which is then applied to the screen plate.

Insbesondere kann das Einspannen des Siebblechs derart erfolgen, dass durch das erste Spannelement eine Kraft parallel zu einer Kante des Siebbleches, beispielsweise durch Anliegen des Siebblechs am Gehäuse, ausgeübt wird, und durch das zweite Spannelement eine elastische Rückstellkraft parallel zu der Kante des Siebbleches in Reaktion auf die von dem ersten Spannelement ausgeübte Kraft ausgeübt wird.In particular, the clamping of the screen plate can be carried out such that by the first clamping element, a force parallel to an edge of the screen plate, for example by abutment of the screen plate on the housing, and exerted by the second clamping element an elastic restoring force parallel to the edge of the screen plate in response is exerted on the force exerted by the first clamping element force.

Gemäß einem Beispiel des erfindungsgemäßen Verfahrens wird das Siebblech mit endlicher Krümmung in oder an dem endlich gekrümmten Siebträger derart eingespannt wird, dass die Kraft von dem ersten Spannelement und die Kraft von dem zweiten Spannelement parallel zu der gekrümmten Oberfläche des gekrümmten Siebblechs ausgeübt wird. Der Siebträger und somit die Siebeinrichtung können also eine im wesentlichen ellipsoidale Teilform aufweisen, beispielsweise die Form eines Teils eines Zylinders oder Zylindermantels oder einer Kugel oder eines Kugelmantels, und somit eine endliche Krümmung besitzen. Insbesondere kann eine Kraft von dem ersten und/oder zweiten Spannelement entlang der Krümmung und senkecht zu der Längsachse des teilweise von der Siebeinrichtung umgebenen Rotors einer Zerkleinerungsvorrichtung wirken.According to one example of the method according to the invention, the fin-curvilinear screen plate is clamped in or on the finely curved portafilter so that the force from the first tension element and the force from the second tension element are exerted parallel to the curved surface of the curved screen plate. The filter holder and thus the screening device can thus have a substantially ellipsoidal part shape, for example the shape of a part of a cylinder or cylinder jacket or a ball or a ball shell, and thus have a finite curvature. In particular, a force of the first and / or second clamping element along the curvature and senkechtcht act to the longitudinal axis of the partially surrounded by the sieve rotor of a crushing device.

Weitere Merkmale und eine beispielhafte Ausführungsform der vorliegenden Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. Es versteht sich, dass die Ausführungsform den Bereich der vorliegenden Erfindung nicht erschöpft. Es versteht sich weiterhin, dass einige oder sämtliche der im Weiteren beschriebenen Merkmale auch auf andere Weise miteinander kombiniert werden können.Further features and an exemplary embodiment of the present invention will be explained in more detail with reference to the drawing. It is understood that the embodiment does not exhaust the scope of the present invention. It is further understood that some or all of the features described below may be combined with each other in other ways.

Figur 1 stellt ein Beispiel für Befestigungsmittel für ein Siebblech dar, wobei die Befestigungsmittel ein Klemmteil und ein Druckfederelement umfassen. FIG. 1 illustrates an example of fastening means for a screen plate, wherein the fastening means comprise a clamping part and a compression spring element.

Zunächst sei erwähnt, dass die Begriffe "Siebblech" und "Sieb" in dieser Anmeldung synonym verwendet werden und der Begriff "Siebblech" insbesondere keine Einschränkung des Materials des Siebs ausdrücken soll. Ebenso werden die Ausdrücke "Siebkassette" und "Siebträger" synonym verwendet und soll der Ausdruck "Siebkassette" keine geometrische oder sonstige Einschränkung gegenüber dem neutralen Begriff des Trägers ausdrücken.It should first be mentioned that the terms "screen plate" and "screen" are used interchangeably in this application and the term "screen plate" is intended in particular to express no restriction of the material of the screen. Likewise, the terms "screen cassette" and "portafilter" are used interchangeably and the term "screen cassette" is not intended to express any geometric or other limitation on the neutral term of the carrier.

Wie in Figur 1 gezeigt, umfasst eine im Schnitt gezeigte Zerkleinerungseinrichtung eine Siebeinrichtung 1, die einen Rotor 2 (der sich in dem gezeigten Beispiel in Gegenuhrzeigerrichtung dreht) teilweise umgibt. Am oberen rechten Ende der Siebeinrichtung 1 befindet sich ein Statormesser 3, welches in Zusammenarbeit mit den auf dem Rotor 2 angebrachten rotierenden Messern 4 aufgegebenes Material zerkleinert. Ein Siebblech 5 einer bestimmten Lochung (hier sind verschiedene Formen, z. B. eine Wabenform, möglich) ist an einem Siebträger 6 mithilfe eines Klemmteils 7 und eines Druckfederelements 8 befestigt. Die Siebeinrichtung kann mehrere Siebbleche beispielsweise mit einer Siebgröße von 5 bis 150 mm umfassen. Es versteht sich, dass in verschiedenen Ausführungsformen ein feststehender oder beweglicher Teil des Gehäuses die Funktion des Klemmteils 7 übernehmen kann.As in FIG. 1 1, a shredder shown in section includes a screen 1 which partially surrounds a rotor 2 (which rotates counterclockwise in the example shown). At the upper right end of the screening device 1 is a stator blade 3, which comminuted in cooperation with the mounted on the rotor 2 rotating blades 4 discontinued material. A screen plate 5 of a specific perforation (various shapes, eg a honeycomb shape are possible here) is fastened to a portafilter 6 by means of a clamping part 7 and a compression spring element 8. The screening device may comprise a plurality of screen plates, for example with a sieve size of 5 to 150 mm. It is understood that in various embodiments, a fixed or movable part of the housing can take over the function of the clamping part 7.

Wie es auf der rechten Seite von Figur 1 gezeigt ist, übt das Klemmteil 7 eine Kraft F auf eine Auskragung oder einen Vorsprung 9 aus, der oder die integral mit dem Siebblech 5 ausgebildet sein kann oder anderweitig mit diesem fest verbunden ist. Über diese Auskragung 9 wird durch das Klemmteil 7 eine Kraft F in peripherer Richtung (Umfangsrichtung) im Uhrzeigersinn entlang des Siebblechs 5 ausgeübt. Die Größe der Kraft kann von dem Fachmann je nach konkreter Anwendung für einen bestimmten Zerkleinerertyp, z. B. durch Schraubeinstellung des Klemmteils 7, eingestellt werden.As it is on the right side of FIG. 1 is shown, the clamping member 7 exerts a force F on a projection or a projection 9, which may be formed integrally with the screen plate 5 or otherwise firmly connected thereto. About this projection 9 a force F in the peripheral direction (circumferential direction) in the clockwise direction along the screen plate 5 is exerted by the clamping member 7. The size of the force may, depending on the specific application for a particular type of shredder, z. B. by screw adjustment of the clamping part 7, can be adjusted.

Das Siebblech 5 wird durch das Klemmteil 7 über einen weiteren Vorsprung (eine Auskragung) 10 des Siebblechs gegen ein Druckfederelement 8, z. B. eine kaltgeformte Druckfeder aus Edelstahl gedrückt. In anderen Ausführungsformen kann eine Gummiplatte die Druckfeder aus Edelstahl ersetzen. Der Federkörper kann zylindrisch, rechteckig, kegelförmig, doppelkegelförmig, tonnenförmig, usw. sein. Es können Spiralflachfedern sowie Dreh- und Schenkelfedem verwendet werden.The screen plate 5 is by the clamping member 7 via a further projection (a projection) 10 of the screen plate against a compression spring element 8, z. B. pressed a cold-formed spring made of stainless steel. In other embodiments, a rubber plate may replace the stainless steel compression spring. The spring body can be cylindrical, rectangular, conical, double-conical, barrel-shaped, etc. Spiral flat springs as well as turn and thigh springs can be used.

Ein Widerlagervorsprung 11 der Siebeinrichtung 1, der z.B. an der Siebkassette 6 (dem Siebträger) ausgebildet ist, nimmt die von dem Klemmteil 7 ausgeübte und von dem Druckfederelement 8 übermittelte Kraft F auf. Das Siebblech wird somit mit endlicher Krümmung gespannt. Es kann leicht durch Betätigen des Klemmteils 7 gelöst werden. Zudem ist die Befestigung des Siebbleches gegenüber Vibrationen und ähnlicher Belastung im Betrieb durch das Vorsehen der Druckfeder relativ unempfindlich.An abutment projection 11 of the screening device 1, e.g. is formed on the screen cassette 6 (the portafilter), the pressure exerted by the clamping part 7 and transmitted from the compression spring element 8 force F increases. The screen plate is thus stretched with finite curvature. It can be easily solved by operating the clamping part 7. In addition, the attachment of the screen plate against vibration and similar stress during operation by the provision of the compression spring is relatively insensitive.

Die erfindungsgemäßen Befestigungsmittel zur Befestigung von Siebblechen an Siebkassetten können vorteilhaft sowohl in Einwellen- als auch Mehrwellenzerkleinerem Anwendung finden.The fastening means according to the invention for fastening screen plates to screen cassettes can advantageously be used both in single-shaft and multi-shaft shredders.

Claims (8)

  1. Fixing means for fixing a sheet-metal screening plate (5) to a screen carrier (6) of a screening device (1) for a crushing apparatus, which comprise
    a first tensioning element that is connected to the screening device (1), particularly the screen carrier (6), and which is designed to exert a force on the screening plate (5);
    a second tensioning element that is connected to the screening device (1), particularly the screen carrier (6), and which is designed to exert a force on the screening plate (5);
    wherein the first tensioning element is a mechanical clamping member (7) that is designed to exert a force parallel to an edge of the screening plate (5), characterised in that the second tensioning element is a resilient element, particularly a spring element (8) that is designed to exert a resilient restoring force parallel to the edge of the screening plate (5) in reaction to the force exerted by the first tensioning element.
  2. The fixing means according to claim 1, wherein the first and/or second tensioning element comprises a spring element (8).
  3. Method of fixing a screening plate (5) to a screen carrier (6) of a screening device (1) for a crushing apparatus, comprising the step of
    tensioning the screening plate (5) in or on the screen carrier (6) between a first and a second tensioning element, such that the first tensioning element exerts a force parallel to one edge of the screening plate (5) and the second tensioning element exerts a resilient restoring force parallel to the edge of the screening plate (5) in reaction to the force exerted by the first tensioning element.
  4. Method according to claim 3, wherein the screening plate (5) is tensioned with a finite curvature in or on the finitely curved screen carrier (6) such that the force from the first tensioning element and the force from the second tensioning element is exerted parallel to the curved surface of the curved screening plate (5).
  5. Screening device (1) for a crushing apparatus which comprises the fixing means according to claim 1 or 2.
  6. Sheet-metal screening plate (5) for a screening device (1) for a crushing apparatus, which is designed to be fixed to a screen carrier (6) of a screening device (1) for a crushing apparatus using the fixing means according to claim 1 or 2, and which comprises a first element in the form of a projection or a protrusion that is designed to engage with the first tensioning element of the screening device (1), and which comprises a second element in the form of a projection or a protrusion that is designed to engage with the second tensioning element of the screening device (1), such that the screening plate (5) can be tensioned between the first and second tensioning elements.
  7. Crushing apparatus for crushing material components, which comprises
    - at least one rotor (2) with rotor blades (4) mounted thereon;
    - at least one stator blade (3);
    - at least one screening device (1); and
    - the fixing means according to claim 1 or 2.
  8. Crushing apparatus for crushing material components, which comprises
    - at least one rotor (2) with rotor blades (4) mounted thereon;
    - at least one stator blade (3); and
    - the screening device (1) according to claim 5 and/or the screening plate (5) according to claim 6.
EP07022426A 2007-11-19 2007-11-19 Screen device and mounting devices for screening sheets Active EP2060329B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE502007003539T DE502007003539D1 (en) 2007-11-19 2007-11-19 Screening device and fastening means for screen plates
AT07022426T ATE464954T1 (en) 2007-11-19 2007-11-19 SCREEN DEVICE AND FASTENING MEANS FOR SCREEN PLATES
ES07022426T ES2340723T3 (en) 2007-11-19 2007-11-19 SIZE DEVICE AND SUBJECTION MEANS FOR SIZE PLATES.
EP07022426A EP2060329B1 (en) 2007-11-19 2007-11-19 Screen device and mounting devices for screening sheets
PCT/EP2008/009718 WO2009065544A1 (en) 2007-11-19 2008-11-17 Screen device and fastening means for screen plates
US12/741,949 US8387904B2 (en) 2007-11-19 2008-11-17 Screen device and fastening means for screen plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07022426A EP2060329B1 (en) 2007-11-19 2007-11-19 Screen device and mounting devices for screening sheets

Publications (2)

Publication Number Publication Date
EP2060329A1 EP2060329A1 (en) 2009-05-20
EP2060329B1 true EP2060329B1 (en) 2010-04-21

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EP07022426A Active EP2060329B1 (en) 2007-11-19 2007-11-19 Screen device and mounting devices for screening sheets

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US (1) US8387904B2 (en)
EP (1) EP2060329B1 (en)
AT (1) ATE464954T1 (en)
DE (1) DE502007003539D1 (en)
ES (1) ES2340723T3 (en)
WO (1) WO2009065544A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977955B (en) * 2014-06-04 2016-08-24 徐州徐工施维英机械有限公司 A kind of screen cloth tension adjusting means and screening plant
CN115007297B (en) * 2022-06-24 2023-07-18 内蒙古民族大学 Negative pressure laminating formula medicinal material that covers is processing apparatus that circles round

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225781A (en) * 1939-08-26 1940-12-24 Hinerfeld Irving Flock cutting machine
US4318512A (en) * 1978-10-26 1982-03-09 Jacobson Machine Works, Inc. Quick action screen latching apparatus for hammermill
US4824034A (en) * 1987-11-23 1989-04-25 Baker Herbert R Apparatus and method for chipping and/or shredding branches and the like
DE4100080A1 (en) * 1991-01-04 1992-07-09 Karl Merz Maschinenfabrik Gmbh Grinding and separating mechanism - has lever-mounted grinding wheels running against inside of rotary sieve drum
US5605291A (en) * 1994-04-28 1997-02-25 Doskocil; David Chipper/mulcher
US5485924A (en) * 1994-05-09 1996-01-23 Sweco, Incorporated Centrifugal sifter and elements thereof

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Publication number Publication date
EP2060329A1 (en) 2009-05-20
US8387904B2 (en) 2013-03-05
ES2340723T3 (en) 2010-06-08
US20110186665A1 (en) 2011-08-04
ATE464954T1 (en) 2010-05-15
WO2009065544A1 (en) 2009-05-28
DE502007003539D1 (en) 2010-06-02

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