EP0727254B2 - Centrifugal mill with exchangeable cassette - Google Patents

Centrifugal mill with exchangeable cassette Download PDF

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Publication number
EP0727254B2
EP0727254B2 EP96102155A EP96102155A EP0727254B2 EP 0727254 B2 EP0727254 B2 EP 0727254B2 EP 96102155 A EP96102155 A EP 96102155A EP 96102155 A EP96102155 A EP 96102155A EP 0727254 B2 EP0727254 B2 EP 0727254B2
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EP
European Patent Office
Prior art keywords
rotor
grinding
centrifugal mill
annular
motor shaft
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Expired - Lifetime
Application number
EP96102155A
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German (de)
French (fr)
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EP0727254A1 (en
EP0727254B1 (en
Inventor
Hans-Jürgen Meyer
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F Kurt Retsch GmbH and Co KG
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F Kurt Retsch GmbH and Co KG
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Application filed by F Kurt Retsch GmbH and Co KG filed Critical F Kurt Retsch GmbH and Co KG
Priority to DE29624206U priority Critical patent/DE29624206U1/en
Publication of EP0727254A1 publication Critical patent/EP0727254A1/en
Publication of EP0727254B1 publication Critical patent/EP0727254B1/en
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    • 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
    • B02C18/062—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives with rotor elements extending axially in close radial proximity of a concentrically arranged slotted or perforated ring
    • 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
    • B02C18/16—Details
    • B02C18/22—Feed or discharge means
    • B02C18/2216—Discharge means

Description

Die Erfindung betrifft eine Zentrifugalmühle für den Laborbetrieb mit einem an einen Antriebsmotor gekuppelten Rotor als Mahlwerkzeug, mit einem den Mahlraum des Rotors umschließenden Ringsieb und einem auf dem äußeren Umfang des Ringsiebes angeordneten ringförmigen Auffangbehälter für das zerkleinerte Mahlgut, wobei die aus Rotor, Ringsieb und Mahlanordnung bestehende Mahleinheit mit einem eine Mahlguteinlaßöffnung aufweisenden Gehäusedeckel verschließbar ist.The invention relates to a centrifugal mill for laboratory use with a rotor coupled to a drive motor as a grinding tool, with a grinding chamber surrounding the rotor ring sieve and arranged on the outer circumference of the annular sieve annular collecting container for the comminuted material, wherein the rotor, ring sieve and Mahlanordnung existing milling unit with a Mahlguteinlaßöffnung having a housing cover is closed.

Eine Zentrifugalmühle mit den vorgenannten Merkmalen ist in dem Firmenprospekt der Firma Retsch GmbH & Co. KG, Haan, unter der Bezeichnung "Ultra-Zentrifugalmühle Typ ZM 1" (Seite 27) beschrieben. Bei der insoweit bekannten Zentrifugalmühle ist in einem topfförmigen Gehäuseteil ein Rotor als Mahlwerkzeug auf eine insoweit stehend angeordnete Motorwelle aufgesteckt und mittels einer aufgesetzten Schraube an der Motorwelle festgelegt. Der von dem Rotor überstrichene Mahlraum ist von einem Ringsieb umschlossen, welches seinerseits von einem ringförmigen Auffangbehälter umgeben ist, so daß das von dem mit hoher Rotationsgeschwindigkeit umlaufenden Rotor zerkleinerte Mahlgut durch die Zentrifugalkräfte über das Ringsieb in den ringförmigen Auffangbehälter eintritt. Die insoweit gebildete Mahleinheit ist von einem an dem Gehäuse zu befestigenden Gehäusedeckel verschlossen.A centrifugal mill having the aforementioned features is described in the company brochure of Retsch GmbH & Co. KG, Haan, under the name "Ultra-Centrifugal Mill Type ZM 1" (page 27). In the extent known centrifugal mill, a rotor is attached as a grinding tool on a so far standing arranged motor shaft in a pot-shaped housing part and fixed by means of an attached screw on the motor shaft. The grinding chamber swept by the rotor is enclosed by a ring sieve, which in turn is surrounded by an annular collecting container, so that the grinding stock comminuted by the rotor revolving at high rotational speed enters the annular collecting container through the centrifugal forces via the annular sieve. The milling unit formed in this respect is closed by a housing cover to be fastened to the housing.

Mit der bekannten Zentrifugalmühle ist der Nachteil verbunden, daß die Innenseite des Gehäusedeckels in dessen den Rotor beziehungsweise den Mahlraum übergreifenden Bereich dem Mahlraum zuzurechnen ist, so daß beim Öffnen des Gehäusedeckels hier anhaftendes Mahlgut verlorengehen kann; dabei sind entsprechende Ungenauigkeiten der Analyse des zu zerkleinernden Mahlgutes nicht auszuschließen. Als weiterer Nachteil ist anzusehen, daß die Reinigung der bekannten Zentrifugalmühle aufwendig ist; nach dem Aufklappen des Gehäusedeckels müssen das Ringsieb und der Auffangbehälter nacheinander aus dem Gehäuse entnommen werden, und da es sich jeweils um völlig getrennte Bauteile handelt, müssen diese Teile auch jeweils einzeln gesäubert werden. Zudem kann es bei der entsprechenden Handhabung wiederum zu Materialverlusten kommen. Schließlich ist auch der Rotor nur umständlich auszuwechseln da die ihn mit der Welle verbindende Schraube jeweils mit einem Werkzeug gelöst beziehungsweise festgeschraubt werden muß.With the known centrifugal mill has the disadvantage that the inside of the housing cover in its the rotor or the grinding chamber cross-area is attributable to the grinding chamber, so that when opening the housing cover here adhering regrind can be lost; In this case, corresponding inaccuracies of the analysis of the ground material to be crushed can not be ruled out. Another disadvantage is to be considered that the purification of the known centrifugal mill is expensive; after opening the housing cover, the ring sieve and the collecting container must be removed one after the other from the housing, and since these are each completely separate components, these parts must also be cleaned individually. In addition, it can in turn come with the appropriate handling material loss. Finally, the rotor is only awkward to replace because the screw connecting it with the shaft must be solved in each case with a tool or screwed tight.

Gemäß dem Oberbegriff des Anspruchs 1 ist auch eine derartige Zentrifugalmühle aus dem Dokument EP-A-0 584 712 bekannt.According to the preamble of claim 1, such a centrifugal mill is also known from the document EP-A-0 584 712.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Zentrifugalmühle mit den gattungsgemäßen Merkmalen zur Verfügung zu stellen, die einfacher handhabbar ist.The invention is therefore based on the object to provide a centrifugal mill with the generic features available, which is easier to handle.

Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Schutzansprüche welche dieser Beschreibung nachgestellt sind.The solution to this problem arises, including advantageous embodiments and modifications of the invention from the content of the claims which this description are reproduced.

Die Erfindung sieht in ihrem Grundgedanken vor, daß der ringförmige Auffangbehälter mit dem an seinem inneren Umfang angeordneten Ringsieb verbunden und als über den Rotor stülpbare Wechselkassette ausgebildet ist und die Wechselkassette eine auch den Mahlraum mit Rotor überspannende und von der Wechselkassette lösbare Abdeckung aufweist. Mit der Erfindung ist der Vorteil verbunden, daß die Wechselkassette zunächst einmal ohne Öffnung des Mahlraumes von dem Rotor abgenommen werden kann, so daß für den nachfolgenden Mahlvorgang eine andere Wechselkassette aufgesetzt und die Zentrifugalmühle in Betrieb genommen werden kann. Die Wechselkassette mit dem zerkleinerten Mahlgut kann an einem geeigneten Ort durch Abheben ihrer Abdeckung geöffnet und der Inhalt vollständig entnommen werden. Damit ist die Handhabung vereinfacht und auch die Reinigung des insoweit als Wechselkassette ausgebildeten einheitlichen Teils erleichtert.The invention provides in its basic idea that the annular collecting container is connected to the arranged at its inner periphery annular sieve and designed as a turntable over the rotor removable cassette and the removable cassette has a also the grinding chamber with rotor spanning and detachable from the removable cassette cover. The invention has the advantage that the removable cassette can be removed from the rotor once without opening the grinding chamber, so that placed for the subsequent grinding another exchange cassette and the centrifugal mill can be put into operation. The removable cassette with the comminuted material can be opened at a suitable location by lifting its cover and the contents are completely removed. This simplifies the handling and also facilitates the cleaning of the extent designed as a removable cassette unitary part.

Die Reinigung des Wechselbehälters ist weiterhin erleichtert, wenn nach einem Ausführungsbeispiel der Erfindung der Auffangbehälter und das Ringsieb über eine Steckverbindung miteinander verbunden und insoweit auch leicht voneinander trennbar sind.The cleaning of the interchangeable container is further facilitated if, according to an embodiment of the invention, the collecting container and the annular sieve are connected to one another via a plug connection and, to that extent, are also easily separable from one another.

Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, daß die Wechselkassette eine der Abdeckung gegenüberliegende und den Mahlraum einschließende Bodenplatte aufweist, wobei die Bodenplatte eine Öffnung zur Aufnahme einer Motorbeziehungsweise Rotorwelle aufweist; bei dieser Ausführungsform wird die Wechselkassette gemeinsam mit dem Rotor von der Motorwelle abgenommen, wobei sich daraus der Vorteil ergibt, daß der Mahlraum vollständig abgeschlossen ist. Nach dem Öffnen der Abdeckung kann insoweit der Rotor von der Kassette abgenommen werden.According to one embodiment of the invention, it is provided that the exchangeable cassette has a bottom plate which is opposite the cover and encloses the grinding chamber, wherein the bottom plate has an opening for receiving a motor or rotor shaft; In this embodiment, the removable cassette is removed together with the rotor of the motor shaft, resulting in the advantage that the grinding chamber is completely completed. After opening the cover so far, the rotor can be removed from the cassette.

Um die sonst erforderüche Abdichtung der Rotorwelle gegen die Öffnung in der Bodenplatte zu vermeiden, kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, die auch bei bekannten Zentrifugalmühlen am Boden des Mahlraumes liegende Labyrinthplatte, auf welcher der Rotor mit einer Labyrinthgestaltung unter Einschluß einer Labyrinthdichtung aufliegt, als Bodenplatte auszubilden und insoweit zum Bestandteil der Wechselkassette zu machen.In order to avoid the otherwise required sealing of the rotor shaft against the opening in the bottom plate can be provided according to an embodiment of the invention, which also in known centrifugal mills lying at the bottom of the grinding chamber labyrinth plate on which rests the rotor with a labyrinth design, including a labyrinth seal, form as a bottom plate and to make it part of the removable cassette.

Soweit bei einer bekannten Zentrifugalmühle der Rotor mit einem hülsenförmigen Wellenansatz auf die Motorwelle steckbar und an dieser drehfest festlegbar ist, ist es zur Vereinfachung des Wechseins des Rotors und damit zur besseren Handhabung nach einem Ausführungsbeispiel der Erfindung vorgesehen, daß der hülsenförmige Wellenansatz des Rotors in seinem Inneren eine Nut zur Aufnahme von darin eintretenden, an der Motorwelle radial verschiebbar gelagerten Verriegelungselementen aufweist, wobei die an der Motorwelle angeordneten Verriegelungselemente als unter Fliehkraftwirkung radial auslenkbare Kugeln ausgebildet sind; zweckmäßig sind nach einem Ausführungsbeispiel der Erfindung die Kugeln durch Federkraft in einer den Querschnitt der Motorwelle überragenden Verriegelungslage vorgespannt.As far as in a known centrifugal the rotor with a sleeve-shaped shaft extension can be plugged onto the motor shaft and rotatably secured thereto, it is to simplify the exchange of the rotor and thus for better handling according to an embodiment of the invention provided that the sleeve-shaped shaft extension of the rotor in his Inner has a groove for receiving therein, on the motor shaft radially displaceably mounted locking elements, wherein arranged on the motor shaft locking elements as below Centrifugal force radially deflectable balls are formed; Appropriately, according to an embodiment of the invention, the balls are biased by spring force in a cross section of the motor shaft superior locking position.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung wiedergegeben, welches nachstehend beschrieben ist. Es zeigen:

Fig. 1
den Funktionsteil einer Zentrifugalmühle im Schnitt,
Fig. 2
die drehfeste Verbindung von Motorwelle und Rotor,
Fig. 3
eine Wechselkassette in einer Einzeldarstellung.
In the drawing, an embodiment of the invention is reproduced, which is described below. Show it:
Fig. 1
the functional part of a centrifugal mill in section,
Fig. 2
the non-rotatable connection of motor shaft and rotor,
Fig. 3
a removable cassette in a single representation.

Die in Figur in ihrem Grundaufbau dargestellte Zentrifugalmühle weist einen Grundkörper 10 auf, an welchem ein topfförmiges Oberteil 11 als Gehäuse über Schrauben 12 befestigt ist. In dem Grundkörper 10 sitzt ein Motorteil 13, welches mit einer aufstehenden Motorwelle 14 über den Grundkörper 10 vorsteht und insoweit in das Oberteil 11 hineinreicht. Die Gehäuseanordnung wird durch einen das Oberteil 11 übergreifenden Gehäusedeckel 15 vervollständigt, in welchem ein an einen Materialeinlauf 17 angeschlossener Trichter 16 angeordnet ist.The centrifugal mill shown in its basic structure in FIG. 1 has a main body 10, to which a pot-shaped upper part 11 as a housing is fastened by means of screws 12. In the base body 10 sits a motor part 13, which projects with an upstanding motor shaft 14 on the base body 10 and extent extends into the upper part 11. The housing arrangement is completed by a housing cover 15 which engages over the upper part 11 and in which a funnel 16 connected to a material inlet 17 is arranged.

Auf die Motorwelle 14 ist ein Rotor 18 über einen hülsenförmigen Ansatz 19 aufgesteckt, wobei die Verbindung zwischen dem Rotor 18 und der Motorwelle 14 sich im einzelnen aus Figur 2 ergibt. Zur Führung des Rotors 18 ist zwischen dem Grundkörper 10 und dem Rotor 18 eine Labyrinthplatte 22 mit entsprechenden Labyrinthvorsprüngen angeordnet, auf welcher der Rotor 18 mit zugeordneten Labyrinthgestaltungen 23 läuft; zwischen Labyrinthplatte 22 und Labyrinthgestaltungen 23 des Rotors 18 liegt eine Labyrinthdichtung 24, um insoweit den durch den Rotor 18 definierten Mahlraum 25 gegen die Motorwelle 14 abzudichten.On the motor shaft 14, a rotor 18 is attached via a sleeve-shaped projection 19, wherein the connection between the rotor 18 and the motor shaft 14 results in detail from Figure 2. To guide the rotor 18, a labyrinth plate 22 with corresponding labyrinth projections is arranged between the main body 10 and the rotor 18, on which the rotor 18 runs with associated labyrinth designs 23; between the labyrinth plate 22 and labyrinth designs 23 of the rotor 18 is a labyrinth seal 24 to seal so far defined by the rotor 18 grinding chamber 25 against the motor shaft 14.

Wie sich aus Figur 2 ergibt, weist der Rotor 18 im Inneren seines hülsenförmigen Ansatzes 19 eine Nut 20 auf, in welche an der Motorwelle 14 radial verschieblich gelagerte und unter Federbelastung nach außen gedrückte Kugeln 21 eingreifen; aufgrund der mit hoher Rotationsgeschwindigkeit umlaufenden Motorwelle 14 beziehungsweise hülsenförmigen Ansatz 19 des Rotors 18 werden durch die Fliehkraft die Kugeln 21 nach außen in die Nut 20 des hülsenförmigen Ansatzes 19 des Rotors 18 gedrückt und sorgen dabei für eine sichere Verriegelung des Rotors; andererseits kann bei Stillstand der Rotor 1B einfach von der Motorwelle 14 abgezogen werden, indem durch entsprechenden Zug die Kugeln 21 in den Querschnitt der Motorwelle 14 hineingedrückt werden und damit der hülsenförmige Ansatz 19 von der Motorwelle 14 abgezogen werden kann.As is apparent from Figure 2, the rotor 18 in the interior of its sleeve-shaped projection 19 has a groove 20 in which on the motor shaft 14 radially slidably mounted and engage under spring load outwardly pressed balls 21; due to the rotating at high speed motor shaft 14 and sleeve-shaped projection 19 of the rotor 18, the balls 21 are pressed by the centrifugal force outwardly into the groove 20 of the sleeve-shaped projection 19 of the rotor 18 and thereby ensure a secure locking of the rotor; On the other hand, at standstill, the rotor 1B can be easily removed from the motor shaft 14 by the balls 21 are pressed by appropriate train in the cross section of the motor shaft 14 and thus the sleeve-shaped projection 19 can be subtracted from the motor shaft 14.

Wie sich aus einer Zusammenschau der Figuren 1 und 3 ergibt, ist in das Oberteil 11 eine Wechselkassette 26 einsetzbar, welche aus einem äußeren ringförmigen Auffangbehälter 27 und einem an dessen Innenumfang festgelegten Ringsieb 28 besteht, welches Ringsieb 28 bei montierter Wechselkassette 26 den Rotor 18 beziehungsweise den Mahlraum 25 umschließt. Auffangbehälter 27 und Ringsieb 28 sind jeweils derart miteinander verbunden, vorzugsweise durch eine zu Reinigungszwecken lösbare Steckverbindung, daß sich eine einheitliche Handhabung der Wechselkassette 26 ergibt. Die Wechselkassette 26 ist mit einer eigenen oberen Abdeckung 29 versehen, die über eine umlaufende Dichtung 30 gegen den äußeren Rand des Auffangbehälters 27 abgedichtet und im übrigen den Auffangbehälter 27 verschließend wie auch den Mahlraum 25 übergreifend an dem Auffangbehälter 27 festlegbar ist.As can be seen from a comparison of Figures 1 and 3, in the upper part 11, a removable cassette 26 can be used, which consists of an outer annular collecting container 27 and a set on its inner circumference ring screen 28, which ring sieve 28 when mounted removable cartridge 26, the rotor 18 and encloses the grinding chamber 25. Collecting container 27 and ring sieve 28 are each connected to each other in such a way, preferably by a detachable for cleaning plug connection that results in a uniform handling of the removable cartridge 26. The removable cassette 26 is provided with its own upper cover 29 which is sealed by a peripheral seal 30 against the outer edge of the collecting container 27 and the rest of the collecting container 27 closing and the grinding chamber 25 across the collecting container 27 can be fixed.

Bei Gebrauch der Zentrifugalmühle ist die Wechselkassette 26 in das Oberteil 11 eingesetzt und der Gehäusedeckel 15 geschlossen, wobei der Gehäusedeckel 15 über eine zugeordnete Gestaltung auf die Abdeckung 29 der Wechselkassette 26 drückt und diese dadurch unverrückbarfestlegt. Über den Materialeinlauf 17 und den Trichter 16 gelangt zu zerkleinerndes Mahlgut in den Mahlraum 25 und wird hier durch den mit hoher Drehgeschwindigkeit umlaufenden Rotor 18, der über die Kugelverriegelung 21 mit der Motorwelle 14 verbunden ist, zerkleinert; das zerkleinerte Mahlgut tritt über das Ringsieb 28 in den Auffangbehälter 27 ein. Nach Abschluß der Zerkleinerungsarbeit wird der Gehäusedeckel 15 geöffnet, und die durch die Abdeckung 29 verschlossene Wechselkassette 26 kann aus dem Oberteil 11 entnommen und an anderer Stelle mit der gebotenen Sorgfalt geöffnet, geleert und gereinigt werden; soll zusätzlich der Rotor 18 gewechselt werden, so kann der Rotor 18 aufgrund der beschriebenen Kugelverriegelung 21 einfach von der Motorwelle 14 abgezogen werden.When using the centrifugal mill, the removable cassette 26 is inserted into the upper part 11 and the housing cover 15 is closed, wherein the housing cover 15 presses on an associated design on the cover 29 of the removable cassette 26 and thereby immovably sets. About the material inlet 17 and the hopper 16 to be comminuted millbase passes into the grinding chamber 25 and is here by the rotating at high speed rotor 18, which is connected via the ball lock 21 with the motor shaft 14, comminuted; the comminuted material passes through the ring screen 28 into the collecting container 27. After completion of the crushing work of the housing cover 15 is opened, and closed by the cover 29 removable cartridge 26 can be removed from the upper part 11 and opened elsewhere with the necessary care, emptied and cleaned; If, in addition, the rotor 18 is to be exchanged, the rotor 18 can simply be pulled off the motor shaft 14 due to the described ball lock 21.

Claims (8)

  1. Centrifugal mill for laboratory operation, with a rotor (18) coupled to a drive motor as a grinding tool, with an annular sieve (28) enclosing the grinding space (25) of the rotor (18) and an annular collecting vessel being insertable into the housing of the centrifugal mill and arranged on the outer circumference of the annular sieve (28) for the comminuted grinding stock, the grinding unit consisting of the rotor (18), annular sieve (28) and grinding arrangement being sealable by a casing lid (15) with a grinding stock inlet aperture (17), characterized in that the annular collecting vessel (27) is connected to the annular sieve (28) arranged on its inner circumference and is formed as an interchangeable cassette (26) which can be placed around the rotor (18), and the interchangeable cassette (26) has a cover (29) also spanning the grinding space (25) with rotor (18) and detachable from the interchangeable cassette (26).
  2. Centrifugal mill for laboratory operation, with a rotor (18) coupled to a drive motor as a grinding tool, with an annular sieve (28) enclosing the grinding space (25) of the rotor (18) and an annular collecting vessel being insertable into the housing of the centrifugal mill and arranged on the outer circumference of the annular sieve (28) for the comminuted grinding stock, the grinding unit consisting of the rotor (18), annular sieve (28) and grinding arrangement being sealable by a casing lid (15) with a grinding stock inlet aperture (17), characterized in that the annular collecting vessel (27) is connected to the annular sieve (28) arranged on its inner circumference and is formed as an interchangeable cassette (26) with a cover (29) also spanning the grinding space (25) with rotor (18) and detachable from the interchangeable cassette (26), the interchangeable cassette (26) having a base plate lying opposite the cover (29) and including the grinding space (25) with the rotor (18) arranged therein and the base plate being provided with an aperture to take up a motor shaft or rotor shaft, so that the interchangeable cassette (26) is removable jointly with the rotor (18) from the motor shaft.
  3. Centrifugal mill according to claim 1 or 2, characterized in that the collecting vessel (27) and the annular sieve (28) are connected to one another via a plug-in connection.
  4. Centrifugal mill according to claim 2 or 3, characterized in that the base plate of the interchangeable cassette (26) is formed as a labyrinth plate (22) with a labyrinth seal (24) against the rotor (18) sitting thereon.
  5. Centrifugal mill according to any of claims 1 to 4, the rotor being pluggable with a sheath-shaped shaft projection onto the motor shaft and fixable in a torsionally resistant manner on this, characterized in that the sheath-shaped shaft projection (19) of the rotor (18) has in its interior a groove (20) to take up latching elements (21) entering therein supported radially displaceably on the motor shaft (14).
  6. Centrifugal mill according to claim 5, characterized in that the latching elements arranged on the motor shaft (14) are formed as balls (21) radially ejectable under the influence of centrifugal force.
  7. Centrifugal mill according to claim 6, characterized in that the balls (21) are retensioned by spring force in a latching position projecting beyond the cross-section of the motor shaft (14).
EP96102155A 1995-02-20 1996-02-14 Centrifugal mill with exchangeable cassette Expired - Lifetime EP0727254B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29624206U DE29624206U1 (en) 1995-02-20 1996-02-14 Centrifugal mill with exchangeable cassette

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29502787U 1995-02-20
DE29502787U DE29502787U1 (en) 1995-02-20 1995-02-20 Centrifugal mill with exchangeable cassette

Publications (3)

Publication Number Publication Date
EP0727254A1 EP0727254A1 (en) 1996-08-21
EP0727254B1 EP0727254B1 (en) 2001-09-05
EP0727254B2 true EP0727254B2 (en) 2006-05-03

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Country Status (4)

Country Link
US (1) US5662282A (en)
EP (1) EP0727254B2 (en)
JP (1) JP3697593B2 (en)
DE (2) DE29502787U1 (en)

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WO2013186362A1 (en) * 2012-06-14 2013-12-19 Retsch Gmbh Rotor mill having direct or indirect cooling of the milling chamber of the rotor mill

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AU2014227548B2 (en) * 2007-11-07 2017-06-08 Stryker Corporation Bone mill for use with a base unit
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DE202012013666U1 (en) 2012-05-23 2019-05-06 Fritsch Gmbh grinding mill
DE202012013667U1 (en) 2012-05-23 2019-04-18 Fritsch Gmbh grinding mill
DE102012010064A1 (en) 2012-05-23 2013-11-28 Fritsch Gmbh Grinding mill for cutting hard material e.g. polyactylene material, has grinders whose components are interconnected by releasable connections so that selected grinder is replaced by alternative grinding by hand
DE102016013022A1 (en) 2016-03-24 2017-09-28 Retsch Gmbh Shredding device for laboratory operation and damper for a shredding device
DE202016006714U1 (en) 2016-03-24 2017-06-29 Retsch Gmbh Shredding device for laboratory operation and damper for a shredding device
CN112221607A (en) * 2020-09-27 2021-01-15 王宏伟 Biomedical auxiliary device provided with combined mechanism
CN112318941A (en) * 2020-11-03 2021-02-05 武汉艺高包装彩印有限公司 Double-cutter slitter edge separating and collecting device of bag making machine
CN112718105A (en) * 2020-12-02 2021-04-30 安徽索维机电设备制造有限公司 Prevent airtight dust collector for dull polish machine of jam

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US3180582A (en) * 1963-06-12 1965-04-27 Bath Iron Works Corp Bowl for centrifugal pulverizer
US3221997A (en) * 1963-10-28 1965-12-07 Smit Gerard Clement Electric coffee mill
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US4699326A (en) * 1984-06-22 1987-10-13 Cedarapids, Inc. Vertical shaft impact crusher with split tub
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US4844365A (en) * 1988-06-06 1989-07-04 Rossouw Pieter J Rotary impact crusher
CH688269A5 (en) * 1992-08-21 1997-07-15 Debio Rech Pharma Sa Ultra Centrifugal Mill and its implementation for cryogenic grinding of thermally sensitive material.
BE1007848A3 (en) * 1993-12-14 1995-11-07 Magotteaux Int A centrifugal impact crusher.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8002774B2 (en) 2007-11-07 2011-08-23 Stryker Corporation Bone mill including a base and a mill head separate from the base, the mill head including a moveable catch tray
WO2013186362A1 (en) * 2012-06-14 2013-12-19 Retsch Gmbh Rotor mill having direct or indirect cooling of the milling chamber of the rotor mill
DE202013012350U1 (en) 2012-06-14 2016-06-06 Retsch Gmbh Rotor mill with direct or indirect cooling of its grinding chamber

Also Published As

Publication number Publication date
JPH08252471A (en) 1996-10-01
JP3697593B2 (en) 2005-09-21
EP0727254A1 (en) 1996-08-21
EP0727254B1 (en) 2001-09-05
US5662282A (en) 1997-09-02
DE29502787U1 (en) 1995-04-20
DE59607599D1 (en) 2001-10-11

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