EP0885113B1 - Device for feeding moulding masses to tablet-compressing machines - Google Patents

Device for feeding moulding masses to tablet-compressing machines Download PDF

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Publication number
EP0885113B1
EP0885113B1 EP96907354A EP96907354A EP0885113B1 EP 0885113 B1 EP0885113 B1 EP 0885113B1 EP 96907354 A EP96907354 A EP 96907354A EP 96907354 A EP96907354 A EP 96907354A EP 0885113 B1 EP0885113 B1 EP 0885113B1
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EP
European Patent Office
Prior art keywords
feed
compartment
cell
rotation
feed device
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Expired - Lifetime
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EP96907354A
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German (de)
French (fr)
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EP0885113A1 (en
Inventor
Jürgen Hilmann
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Bayer Pharma AG
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Schering AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable

Definitions

  • the invention relates to a device in tableting machines for feeding molding compounds, especially those related to their flowability are problematic, in one Feed channel that ends in a filling shoe, a control or controllable metering device is arranged.
  • the filling shoe with the help of which the molding compounds the individual Press chambers are fed, is largely sealing for example a round tray table or a die table on. It covers a large number of bale chamber openings.
  • the filling shoe is mostly during tableting filled with molding compound from a feed channel a reservoir got there.
  • the molding compounds used for the tablet production exist from a mixture of active ingredients and carrier substances. Most of the powdered carrier substances have the task, to make the active ingredients manageable in the form of tablets. For this purpose, the carrier substances have to be under Exposure to pressure in a permanently stable shape let bring.
  • the molding compound generally passes from the storage container gravity feed into the filling shoe.
  • Vibrators are supported in some feeding systems and / or stirring devices used. With some feeding systems If several paddlewheels are used in the filling shoe, which are stored around vertical axes, immediately above turn the tablet table. They are among themselves in engagement.
  • the impeller wheels transport the molding compound out of the feed area and push it continuously through the bale chamber openings.
  • the excess, not the same Pressing compound taken up by the press chambers is in the filling shoe transported and mixed along the inner wall in a circle. In the gaps between the blade edges and the The molding compound becomes the tablet table and the filling shoe inner wall permanently compacted and tumbled.
  • the impeller is an endless belt guided by two wheels used.
  • the driven endless belt has on its outside a variety of cams that the molding compound of a feed hopper from to the die holes.
  • the Feed hopper is part of an adjustable orifice metering. For this purpose, it is rotatably mounted on the filling shoe about its longitudinal axis, its outlet opening being eccentric to its Axis of rotation arranged and only congruent in one position with the filling opening of the filling shoe.
  • a motor Twisting the feed funnel in relation to the filling shoe the molding compound flow is changed controllably.
  • the molding compound is also in the filling shoe through the endless belt permanently transported, mixed with his cams and walked.
  • the closing movement of the feed hopper also leads on its lower edge for baking the molding compound.
  • the the resulting cross-sectional change causes an uncontrollable Control behavior of the dosing device.
  • the invention is therefore based on the problem of a feed device to create molding compounds with which the molding compound during the tableting process without changing their bulk density and their flow behavior controlled or regulated the Filling shoe is fed and stored there temporarily. All parts the feed device should be designed such that it easy to assemble and easy to clean. Furthermore should the disadvantages known from the prior art avoided become.
  • An at least controllable metering device is located in the feed channel arranged, the one, surrounded by a housing, motor driven cell roller with at least four cells, the approximately horizontally oriented axis of rotation the cell roller is arranged transversely to the feed channel.
  • a motor-driven cellular wheel for loading one Briquette press is known from DE-PS 595 130.
  • This Document describes an eight-winged cellular wheel, in the coal dust for portioning the individual briquette masses through an adjustable slot from the side into the Cells is erased. The bulk material fills one completely open control slot the cell space completely out.
  • a cell roller is known from US Pat. No. 4,238,058 known with central inflow. With this cell roller the individual cells due to the special design of the Inlet completely filled, so that here too Bulk between the cell walls and the cell roller surrounding housing is maltreated.
  • the cell roller is in the Feed channel to the filling shoe of the tableting machine - at least in terms of construction - with an overshot water wheel comparable.
  • the molding compound trickles from above, for example coming over the feed channel onto the cell roller. In doing so the cells just moved under the channel opening filled one after the other. At the same time, the filled cells in the feed channel below the cell roller emptied. This lower part of the feed channel opens into the Filling shoe, whereby it can also be part of the same.
  • the cell roller is driven to the water wheel. Corresponding the speed that can be set on your drive promotes them a certain amount of molding compound per unit of time.
  • the cell roller is surrounded by a housing whose inner contour only Transport can be slightly larger than its outer contour the molding compound is reduced by lowering the drive speed or be stopped.
  • the imaginary center lines of the feed channel and the metering device oriented transversely to it be skewed to each other.
  • the molding compound despite the effect of gravity often not in sufficient quantity in the filling shoe slips, scooped from the upper feed channel into the lower one or poured.
  • the diameter of the cell roller is larger than twice Inner diameter of the upper part of the feed channel or at a rectangular feed channel larger than its double Width.
  • the length of the cells is preferably greater than that Sum of the inside diameter of the feed channel - or its Expansion parallel to the axis of rotation of the cell roller - and the quotient from the double cell depth through the tangent the angle of repose of the molding compound. Accordingly, it has the cell roller housing penetrating feed channel a smaller Cross section as the maximum parallel longitudinal cut area through the cell roller.
  • the molding compound can the individual Neither fill cells to their full length nor can they adhere to the Sprinkle the cell roller freely.
  • the cells are filled.
  • the cell volume is not a direct dosage size, since the degree of filling of the cells is a function of the physical Properties of the molding compound is.
  • the cell cross section and the cell length are dimensioned such that the Pressing compound for cells on the front of the cell roller are open, do not touch the end walls of the housing. Hence The molding compound does not get between parts that are relative move towards each other.
  • the cells are arranged parallel to the axis of rotation and have an almost semicircular cross-sectional contour. Such a shape enables a smooth, edge-free surface of the cell, which is both inexpensive manufacture as well as easy to clean.
  • Other cross-sectional contours such as. polygonal, triangular, trapezoidal etc. are also possible.
  • the bars act between the cells like scoops that are almost perpendicular to the there tangent or tangential plane of the inner wall of the Housing.
  • This cell and web design prevented compressing the molding compound in front of the respective web edge. Possibly can be the angle between the sliding web edge and the corresponding housing tangent also more than 90 ° be.
  • cells are also conceivable which not exactly straight, but e.g. crescent-shaped run curved. These cells, their curved Course mirror-symmetrical to the average cross-sectional area are aligned in terms of their sweeping so that the side edge area of the cells is the middle area - seen in the direction of rotation - advanced.
  • This shape prevents additionally a contact of the molding compound with the end walls of the housing.
  • Another possibility is the molding compound Keeping away the end walls is keeping the cells with to be provided on the side edges or laterally via cover disks to limit.
  • the cell depth corresponds to at least the maximum, half Width of the cells.
  • the cell width is the clear distance two adjacent bridges. Among other things about the cell depth the molding compound throughput per unit of time is determined constructively. To minimize the grinding and compacting of the Molding compounds between the inlet edges of the feed channel and Ridges of the cell roller prefer deep cells.
  • the feed channel penetrating the housing of the cell roller makes an angle of, for example, with the vertical 20 to 50 °.
  • the angle is generally dependent on the spatial conditions predefined within the tableting machine. In in some cases there is also a vertically aligned feed channel possible.
  • the imaginary center line of the feed channel intersects the Rotation axis of the cell roller, preferably in the area of half length.
  • the bulk quantity distribution is within of a cell mirror-symmetrical to the cross-sectional area in the center of the cell.
  • an inclined feed channel which also the housing the cell roller cuts vertically and in the center
  • the cell roller selected a direction of rotation in which the Cell trickling molding compound first by rotating the cell roller is raised. That is, the cell moves on it Circular path a little further up around its axis of rotation, before it reaches the highest point. This makes it down leading pivoting movement of the individual filled cells from the highest point less than 180 °. Consequently, the falls Molding compound before reaching the horizontal housing area in the lower part of the feed channel or directly in the filling shoe.
  • the molding compound is not with the help of Ridges or cell partitions are pushed through the housing.
  • the cell roller is powered by a DC motor with a tachometer generator driven.
  • the tachometer generator enables one Speed monitoring of the DC motor.
  • On the DC motor a gearbox is flanged with which the engine speed ins Slow is translated.
  • Between the transmission output shaft and the shaft of the cell roller is preferably a torsionally rigid, Movable or a torsionally flexible coupling arranged.
  • the drive of the cell roller can also be operated in a controlled manner.
  • a fill level sensor is accommodated at least in the fill shoe. It is preferably located in the front area of the Filler shoe that is furthest away from the molding compound feed lies. The relative movement jams in this area between the tablet table and the filling shoe Molding compound.
  • One arranged there in an upper filling shoe zone Sensor that works, for example, capacitively or inductively, recognizes the degree of filling. According to this degree of filling a regulation causes a speed change on the DC motor. This regulation is only indirectly dependent on the Press performance of the tableting machine.
  • the volume flow of the molding compound passing through the filling shoe Speed changes can be varied over a wide range.
  • the speeds are too high undesirable because such molding compounds on the warming Fix cell partitions.
  • the cross-sectional areas can achieve volume flow without increasing the speed the cells are enlarged along the axis of rotation, e.g. by increasing the cell depth.
  • the cell roller have a frustoconical basic shape. At this Shape can be maintained with the same thickness of the cell walls very large changes in cell cross section along the Realize the axis of rotation.
  • Another alternative is to between the cell walls the rigid cell partition walls made of flexible material to manufacture.
  • elastic foils can be attached there which are e.g. to Axis of rotation or an axis laterally offset to it to be pulled. This creates cells with a V-shaped cross-section, the depth of which depends on the respective preload is.
  • Figures 1 and 2 show a device for feeding molding compound from a storage container (5) into a filling shoe (10).
  • the device is one above a tray table (1) Tableting machine arranged.
  • the filling shoe is directly above the tablet table (1) (10) arranged. It covers a variety of bale chambers (2) off.
  • the filling shoe (10) under which the tablet table (1) slides through, has several in its interior Baffles (11) for the accumulation of the molding compound over the Bale chambers (2).
  • a level sensor (12) attached in the upper area of a side wall.
  • a feed channel (20) connects the filling shoe (10) via the metering device (30) with the storage container (5).
  • the upper, tubular part (21) of the feed channel (20) cuts approximately in the middle the transversely arranged, cylindrical housing (31) the metering device (30).
  • the lower part of the feed channel (20) consists of one connected to the housing (31) Flat funnel (22), which creates the connection to the filling shoe (10).
  • the flat funnel (22) is designed so that its Side surfaces almost reach the side of the case. Have the two top and bottom funnel surfaces on the housing (31) from each other a distance which is approximately that Diameter of the upper part (21) of the feed channel (20) corresponds.
  • the upper funnel surface is provided with an opening, which is closed with a lid (23).
  • the Cover (23) grips the lower one with trapezoidal locking lugs Part of the feed channel (20), the front ends of the locking lugs rest on the lower funnel surface. Over the opening can the lower part of the feed channel (20) without expensive disassembly getting cleaned. Of course, the Cover (23) also executed and attached in a different way become.
  • a cell roller (35) is arranged in the housing (31), which has two housing covers at its ends (32) is closed.
  • the cell roller (35) for example by means of a Cross press seat on a shaft (39) is in bearing bushes (33), cf. Figure 2, plain bearings in the housing covers (32) are let in centrally.
  • the housing cover (32) are screwed onto the housing (31) using fine threads.
  • the cell roller (35) has a cylindrical outer contour here, for example eight parallel to their axis of rotation groove-shaped cells (36) are milled with a constant pitch.
  • the width of the cells is in the area of the cylindrical outer contour chosen so that the webs (37) between the adjacent Cells (36) turn out thin-walled.
  • the cell roller is at the illustrated embodiment on both sides with the help of Edge discs (38) limited, The edge discs (38) are also shrunk onto the shaft (39) using a cross press fit.
  • a DC motor is used to drive the cell roller (35) (40) with an attachment gear (42) and a tachometer generator (41) used.
  • the gearbox output of the auxiliary gear (42) is connected to the shaft (39) of the cell roller (35) Coupling gear coupled. For this sits on the shaft of the auxiliary gear (42) a drive wheel (46) and on the shaft (39) an output gear (47). Both wheels (46, 47) are via a traction device (45) connected.
  • the traction means (47) can be a toothed belt, a flat belt or the like.
  • the traction mechanism connects the attachment gear (42) elastically to the cell roller (35).
  • the drive (40-42) also be mounted directly next to the cell roller (35). Between the attachment gear (42) and the cell roller (35) then an elastic coupling, e.g. a bolt coupling arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

A device for feeding moulding masses, in particular those which are problematic because of their fluidity, to tablet-compressing machines, has a controllable or adjustable dosing device (30) arranged in a supply channel (20) that ends in a filling shoe (10). The dosing device (30) has a motor-driven cellular shaft (35) surrounded by a housing (31, 32) and having at least four cells (36). The approximately horizontal axis of rotation of the cellular shaft (35) extends transversely to the supply channel (20). This device allows supplying the moulding mass in a controlled or adjusted manner to the filling shoe (10) during the tablet-compressing process and temporarily storing it therein without modifying its bulk density or fluidity.

Description

Die Erfindung betrifft eine Einrichtung in Tablettiermaschinen zum Zuführen von Preßmassen, insbesondere solchen, die bezüglich ihrer Fließfähigkeit problematisch sind, bei der in einem Zuführkanal, der in einem Füllschuh endet, eine steuer- oder regelbare Dosiereinrichtung angeordnet ist.The invention relates to a device in tableting machines for feeding molding compounds, especially those related to their flowability are problematic, in one Feed channel that ends in a filling shoe, a control or controllable metering device is arranged.

Der Füllschuh, mit dessen Hilfe die Preßmassen den einzelnen Preßkammern zugeführt werden, liegt weitgehend abdichtend auf einem beispielsweise runden Tablettiertisch bzw. einem Matrizentisch auf. Er überdeckt dabei eine Vielzahl von Preßkammeröffnungen. Während des Tablettierens ist der Füllschuh großteils mit Preßmasse gefüllt, die über einen Zuführkanal aus einem Vorratsbehälter dorthin gelangt.The filling shoe, with the help of which the molding compounds the individual Press chambers are fed, is largely sealing for example a round tray table or a die table on. It covers a large number of bale chamber openings. The filling shoe is mostly during tableting filled with molding compound from a feed channel a reservoir got there.

Die für die Tablettenherstellung verwendeten Preßmassen bestehen aus einem Gemenge von Wirkstoffen und Trägersubstanzen. Die meist pulverisierten Trägersubstanzen haben u.a. die Aufgabe, die Wirkstoffe in Form von Tabletten handhabbar zu machen. Hierzu müssen sich speziell die Trägersubstanzen unter Einwirkung von Druck in eine dauerhaft formbeständige Gestalt bringen lassen.The molding compounds used for the tablet production exist from a mixture of active ingredients and carrier substances. Most of the powdered carrier substances have the task, to make the active ingredients manageable in the form of tablets. For this purpose, the carrier substances have to be under Exposure to pressure in a permanently stable shape let bring.

Aus dem Vorratsbehälter gelangt die Preßmasse im allgemeinen mittels Schwerkraftförderung in den Füllschuh. Um diese Förderung zu unterstützen werden in manchen Zuführsystemen Vibratoren und/oder Rühreinrichtungen verwendet. Bei manchen Zuführsystemen werden im Füllschuh mehrere Rührflügelräder eingesetzt, die um vertikale Achsen gelagert, sich unmittelbar über dem Tablettiertisch drehen. Sie stehen hierbei untereinander im Eingriff. Die Rührflügelräder transportieren die Preßmasse aus dem Zuführbereich heraus und schieben sie ununterbrochen über die Preßkammeröffnungen. Die überschüssige, nicht gleich von den Preßkammern aufgenommene Preßmasse wird im Füllschuh an dessen Innenwandung entlang im Kreis transportiert und gemischt. In den Spalten zwischen den Rührflügelkanten und dem Tablettiertisch sowie der Füllschuhinnenwandung wird die Preßmasse permanent verdichtet und gewalkt.The molding compound generally passes from the storage container gravity feed into the filling shoe. To this promotion Vibrators are supported in some feeding systems and / or stirring devices used. With some feeding systems If several paddlewheels are used in the filling shoe, which are stored around vertical axes, immediately above turn the tablet table. They are among themselves in engagement. The impeller wheels transport the molding compound out of the feed area and push it continuously through the bale chamber openings. The excess, not the same Pressing compound taken up by the press chambers is in the filling shoe transported and mixed along the inner wall in a circle. In the gaps between the blade edges and the The molding compound becomes the tablet table and the filling shoe inner wall permanently compacted and tumbled.

Vergleichbare Verhältnisse treffen auf ein aus der DE-PS 40 25 487 bekanntes Füll- und Dosiergerät für Tablettiermaschinen zu. Bei diesem Gerät wird im Füllschuh anstelle der Rührflügelräder ein über zwei Räder geführter Endlosriemen verwendet. Der angetriebene Endlosriemen weist an seiner Außenseite eine Vielzahl von Nocken auf, die die Preßmasse von einem Zuführtrichter aus zu den Matrizenbohrungen fördert. Der Zuführtrichter ist Teil einer regelbaren Blendendosierung. Dazu ist er um seine Längsachse drehbar auf dem Füllschuh gelagert, wobei seine Auslauföffnung exzentrisch zu seiner Drehachse angeordnet und nur in einer Position deckungsgleich mit der Einfüllöffnung des Füllschuhs ist. Durch ein motorisches Verdrehen des Zuführtrichters gegenüber dem Füllschuh wird der Preßmassenfluß regelbar verändert.Comparable conditions meet one from the DE-PS 40 25 487 known filling and dosing device for tableting machines to. With this device is in the filling shoe instead the impeller is an endless belt guided by two wheels used. The driven endless belt has on its outside a variety of cams that the molding compound of a feed hopper from to the die holes. The Feed hopper is part of an adjustable orifice metering. For this purpose, it is rotatably mounted on the filling shoe about its longitudinal axis, its outlet opening being eccentric to its Axis of rotation arranged and only congruent in one position with the filling opening of the filling shoe. By a motor Twisting the feed funnel in relation to the filling shoe the molding compound flow is changed controllably.

Hier wird die Preßmasse ebenfalls im Füllschuh durch den Endlosriemen mit seinen Nocken permanent transportiert, vermischt und gewalkt. Auch führt die Schließbewegung des Zuführtrichters an dessen unterer Kante zum Anbacken der Preßmasse. Die dadurch entstehende Querschnittsveränderung bedingt ein unkontrollierbares Regelverhalten des Dosiergeräts. Here the molding compound is also in the filling shoe through the endless belt permanently transported, mixed with his cams and walked. The closing movement of the feed hopper also leads on its lower edge for baking the molding compound. The the resulting cross-sectional change causes an uncontrollable Control behavior of the dosing device.

Die prinzipiell ungewollten Nachbehandlungen des nochmaligen Mischens, zusätzlichen Verdichtens und Mahlens im Füllschuh verändert die ursprünglichen Eigenschaften der Preßmasse teilweise nachhaltig. Viele Trägerstoffe, wie z.B. auch Lactose, neigen schon nach einigen Minuten dieser Nachbehandlungen zum Klumpen und zur Matrizenbelegung durch Kleben. Durch das Walken und Verdichten verändert sich zwangsläufig die Partikelverteilung der Preßmasse. Das führt zum einen zu einer stark schwankenden Tablettenfestigkeit und zum anderen zu einer Erhöhung der Preßmassendichte. Letzteres bewirkt wiederum bei einzelnen Tabletten punktuell eine höhere Wirkstoffkonzentration und ferner eine größere Ausschußrate aufgrund des dabei gestiegenen, nun zu hohen Tablettengewichts.The principally unwanted post-treatments of the repeated Mixing, additional compaction and grinding in the filling shoe partially changes the original properties of the molding compound sustainable. Many carriers, e.g. also lactose, tend to go away after a few minutes of these treatments Lumps and for matrix assignment by gluing. By walking and compaction inevitably changes the particle distribution the molding compound. On the one hand, this leads to a strong fluctuating tablet strength and on the other hand to an increase the molding compound density. The latter in turn causes individual tablets occasionally have a higher active ingredient concentration and also a larger reject rate due to this increased, now too high tablet weight.

Des weiteren erfordert das durch die Mahlbewegung verursachte Verkleben einen höheren Reinigungsaufwand der mit der Preßmasse in Verbindung kommenden Maschinenteile. Gerade das Zerlegen und Reinigen eines Rührflügelfüllschuhes ist besonders zeitaufwendig und damit kostenintensiv.This also requires that caused by the grinding movement Glue a higher cleaning effort with the molding compound related machine parts. Just disassembling and cleaning a paddle filler shoe is special time consuming and therefore costly.

Der Erfindung liegt daher das Problem zugrunde, eine Zuführeinrichtung für Preßmassen zu schaffen, mit der die Preßmasse während des Tablettiervorgangs ohne Veränderung ihrer Schüttdichte und ihres Fließverhaltens gesteuert oder geregelt dem Füllschuh zugeführt und dort zwischengelagert wird. Alle Teile der Zuführeinrichtung sollen derart gestaltet sein, daß sie einfach zu montieren und leicht zu reinigen sind. Ferner sollen die aus dem Stand der Technik bekannten Nachteile vermieden werden.The invention is therefore based on the problem of a feed device to create molding compounds with which the molding compound during the tableting process without changing their bulk density and their flow behavior controlled or regulated the Filling shoe is fed and stored there temporarily. All parts the feed device should be designed such that it easy to assemble and easy to clean. Furthermore should the disadvantages known from the prior art avoided become.

Das Problems wird mit den Merkmalen des Hauptanspruchs gelöst. Im Zuführkanal wird eine zumindest steuerbare Dosiereinrichtung angeordnet, die eine, von einem Gehäuse umgebene, motorisch angetriebene Zellenwalze mit mindestens vier Zellen aufweist, wobei die annähernd horizontal ausgerichtete Rotationsachse der Zellenwalze quer zum Zuführkanal angeordnet ist.The problem is solved with the features of the main claim. An at least controllable metering device is located in the feed channel arranged, the one, surrounded by a housing, motor driven cell roller with at least four cells, the approximately horizontally oriented axis of rotation the cell roller is arranged transversely to the feed channel.

Ein motorisch angetriebenes Zellenrad zur Beschickung einer Brikettpresse ist aus der DE-PS 595 130 bekannt. In dieser Druckschrift wird ein achtflügeliges Zellenrad beschrieben, in das der Kohlenstaub zur Portionierung der einzelnen Brikettmassen durch einen regelbaren Schlitz von der Seite her in die Zellen hineingeböscht wird. Das Schüttgut füllt bei einem vollständig geöffnetem Regelschlitz den Zellenraum vollständig aus.A motor-driven cellular wheel for loading one Briquette press is known from DE-PS 595 130. In this Document describes an eight-winged cellular wheel, in the coal dust for portioning the individual briquette masses through an adjustable slot from the side into the Cells is erased. The bulk material fills one completely open control slot the cell space completely out.

Des weiteren ist aus der US-PS 4,238,058 eine Zellenwalze mit zentralem Zulauf bekannt. Bei dieser Zellenwalze werden die einzelnen Zellen aufgrund der besonderen Gestaltung des Zulaufs generell vollständig befüllt, so daß auch hier das Schüttgut zwischen den Zellenwänden und dem die Zellenwalze umgebenden Gehäuse malträtiert wird.Furthermore, a cell roller is known from US Pat. No. 4,238,058 known with central inflow. With this cell roller the individual cells due to the special design of the Inlet completely filled, so that here too Bulk between the cell walls and the cell roller surrounding housing is maltreated.

Wie auch an sich bekannte Zellenräder ist die Zellenwalze im Zuführkanal zum Füllschuh der Tablettiermaschine - zumindest bezüglich der Bauweise - mit einem oberschlächtigen Wasserrad vergleichbar. Die Preßmasse rieselt beispielsweise von oben kommend über den Zuführkanal auf die Zellenwalze. Dabei werden die gerade unter der Kanalöffnung hindurchbewegten Zellen nacheinander befüllt. Gleichzeitig werden die befüllten Zellen in den unterhalb der Zellenwalze weiterführenden Zuführkanal entleert. Dieser untere Teil des Zuführkanals mündet in den Füllschuh, wobei er auch Teil desselben sein kann. Im Gegensatz zum Wasserrad ist die Zellenwalze angetrieben. Entsprechend der an ihrem Antrieb einstellbaren Drehzahl fördert sie eine bestimmte Preßmassenmenge pro Zeiteinheit. Da die Zellenwalze von einem Gehäuse umgeben ist, dessen Innenkontur nur geringfügig größer ist als ihre Außenkontur kann der Transport der Preßmasse durch ein Senken der Antriebsdrehzahl verringert bzw. gestoppt werden. Die gedachten Mittellinien des Zuführkanals und der dazu quer ausgerichteten Dosiereinrichtung können dabei windschief zueinander ausgerichtet sein.Like cell wheels known per se, the cell roller is in the Feed channel to the filling shoe of the tableting machine - at least in terms of construction - with an overshot water wheel comparable. The molding compound trickles from above, for example coming over the feed channel onto the cell roller. In doing so the cells just moved under the channel opening filled one after the other. At the same time, the filled cells in the feed channel below the cell roller emptied. This lower part of the feed channel opens into the Filling shoe, whereby it can also be part of the same. In contrast the cell roller is driven to the water wheel. Corresponding the speed that can be set on your drive promotes them a certain amount of molding compound per unit of time. Because the cell roller is surrounded by a housing whose inner contour only Transport can be slightly larger than its outer contour the molding compound is reduced by lowering the drive speed or be stopped. The imaginary center lines of the feed channel and the metering device oriented transversely to it be skewed to each other.

Über die Zellenwalze wird die Preßmasse, die trotz Schwerkrafteinwirkung oft nicht in genügender Menge in den Füllschuh rutscht, vom oberen Zuführkanal in den unteren geschöpft bzw. geschüttet. Dabei rieselt oder fließt die zum Verkleben neigende, bezüglich ihrer Fließfähigkeit problematische Preßmasse, obwohl sie zwangsgefördert wird, ohne Mahleinwirkung oder Verdichtung durch den Zuführkanal mit seiner Dosiereinrichtung in den Füllschuh. Über den Füllschuh gelangt die Preßmasse in die einzelnen Preßkammern. Im Füllschuh selbst werden keine beweglichen Fördermittel wie z.B. Rührflügelräder benötigt.About the cell roller is the molding compound, despite the effect of gravity often not in sufficient quantity in the filling shoe slips, scooped from the upper feed channel into the lower one or poured. The tendency to stick, trickles or flows problematic molding compound with regard to its flowability, although it is forcibly promoted, without grinding influence or compaction through the feed channel with its metering device in the filling shoe. The passes through the filling shoe Molding compound in the individual pressing chambers. In the filling shoe itself no mobile funding such as Agitator impellers needed.

Der Durchmesser der Zellenwalze ist größer als der doppelte Innendurchmesser des oberen Teils des Zuführkanals bzw. bei einem rechteckigen Zuführkanal größer als dessen doppelte Breite. Die Länge der Zellen ist vorzugsweise größer als die Summe aus dem Innendurchmesser des Zuführkanals - bzw. dessen Ausdehnung parallel zur Rotationsachse der Zellenwalze - und dem Quotienten aus der doppelten Zellentiefe durch den Tangens des Schüttwinkels der Preßmasse. Demnach hat der das Zellenwalzengehäuse durchdringende Zuführkanal einen geringeren Querschnitt als die maximale parallele Längsschnittfläche durch die Zellenwalze. Somit kann die Preßmasse die einzelnen Zellen weder auf ihre volle Länge füllen noch kann sie an der Zellenwalze ungehindert vorbeirieseln.The diameter of the cell roller is larger than twice Inner diameter of the upper part of the feed channel or at a rectangular feed channel larger than its double Width. The length of the cells is preferably greater than that Sum of the inside diameter of the feed channel - or its Expansion parallel to the axis of rotation of the cell roller - and the quotient from the double cell depth through the tangent the angle of repose of the molding compound. Accordingly, it has the cell roller housing penetrating feed channel a smaller Cross section as the maximum parallel longitudinal cut area through the cell roller. Thus, the molding compound can the individual Neither fill cells to their full length nor can they adhere to the Sprinkle the cell roller freely.

Entsprechend dem konstanten Schüttwinkel der jeweiligen Preßmasse und der Drehzahl der Zellenwalze sind die Zellen befüllt. Das Zellenvolumen ist hierbei keine direkte Dosiergröße, da der Befüllungsgrad der Zellen eine Funktion der physikalischen Eigenschaften der Preßmasse ist. Der Zellenquerschnitt und die Zellenlänge sind so dimensioniert, daß die Preßmasse bei Zellen, die an der Stirnseite der Zellenwalze offen sind, dort nicht die Gehäusestirnwände berührt. Folglich gelangt die Preßmasse nicht zwischen Teile, die sich relativ zueinander bewegen.According to the constant angle of repose of the respective molding compound and the speed of the cell roller, the cells are filled. The cell volume is not a direct dosage size, since the degree of filling of the cells is a function of the physical Properties of the molding compound is. The cell cross section and the cell length are dimensioned such that the Pressing compound for cells on the front of the cell roller are open, do not touch the end walls of the housing. Hence The molding compound does not get between parts that are relative move towards each other.

Im allgemeinen sind die Zellen parallel zur Rotationsachse angeordnet und haben eine annähernd halbkreisförmige Querschnittskontur. Eine derartige Form ermöglicht eine glatte, kantenfreie Oberfläche der Zelle, die sowohl kostengünstig herzustellen als auch leicht zu reinigen ist. Andere Querschnittskonturen, wie z.B. polygonförmige, dreieckige, trapezförmige u.s.w., sind auch möglich. Vorzugsweise stoßen die Querschnittskonturen der Zellen, in einzelnen Stirnschnitten betrachtet, annähernd senkrecht auf den jeweiligen Hüllkreis der Zellenwalze. Dies gilt besonders für die Kontur der die Preßmasse schiebenden Stegseite. Dadurch wirken die Stege zwischen den Zellen wie Schaufeln, die nahezu senkrecht auf der dortigen Tangente oder Tangentialebene der Innenwandung des Gehäuses stehen. Diese Zellen- und Steggestaltung verhindert ein Verdichten der Preßmasse vor der jeweiligen Stegkante. Gegebenenfalls kann der Winkel zwischen der schiebenden Stegkante und der entsprechenden Gehäusetangente auch mehr als 90° betragen.In general, the cells are arranged parallel to the axis of rotation and have an almost semicircular cross-sectional contour. Such a shape enables a smooth, edge-free surface of the cell, which is both inexpensive manufacture as well as easy to clean. Other cross-sectional contours, such as. polygonal, triangular, trapezoidal etc. are also possible. Preferably come across Cross-sectional contours of the cells, in individual end cuts considered, approximately perpendicular to the respective enveloping circle the cell roller. This is especially true for the contour of the Molding material pushing web side. As a result, the bars act between the cells like scoops that are almost perpendicular to the there tangent or tangential plane of the inner wall of the Housing. This cell and web design prevented compressing the molding compound in front of the respective web edge. Possibly can be the angle between the sliding web edge and the corresponding housing tangent also more than 90 ° be.

Bezüglich der globalen Form sind ferner Zellen denkbar, die in der Art einer Pfeilverzahnung nicht gerade, sondern z.B. sichelförmig gebogen verlaufen. Diese Zellen, deren gebogener Verlauf spiegelsymmetrisch zur mittleren Querschnittsfläche ausgerichtet ist, sind bezüglich ihrer Pfeilung so ausgelegt, daß der seitliche Randbereich der Zellen dem mittleren Bereich - in Drehrichtung gesehen - voreilt. Diese Formgebung verhindert zusätzlich eine Berührung der Preßmasse mit den Stirnwänden des Gehäuses. Eine weitere Möglichkeit die Preßmasse von den Stirnwänden fernzuhalten besteht darin, die Zellen mit seitlichen Rändern zu versehen oder über Deckscheiben seitlich zu begrenzen.With regard to the global shape, cells are also conceivable which not exactly straight, but e.g. crescent-shaped run curved. These cells, their curved Course mirror-symmetrical to the average cross-sectional area are aligned in terms of their sweeping so that the side edge area of the cells is the middle area - seen in the direction of rotation - advanced. This shape prevents additionally a contact of the molding compound with the end walls of the housing. Another possibility is the molding compound Keeping away the end walls is keeping the cells with to be provided on the side edges or laterally via cover disks to limit.

Die Zellentiefe entspricht mindestens der maximalen, halben Breite der Zellen. Die Zellenbreite ist dabei der lichte Abstand zweier benachbarter Stege. U.a. über die Zellentiefe wird der Preßmassendurchsatz pro Zeiteinheit konstruktiv bestimmt. Für die Minimierung des Mahlens und Verdichtens der Preßmassen zwischen den Einlaßkanten des Zuführkanals und den Stegen der Zellenwalze werden tiefe Zellen bevorzugt.The cell depth corresponds to at least the maximum, half Width of the cells. The cell width is the clear distance two adjacent bridges. Among other things about the cell depth the molding compound throughput per unit of time is determined constructively. To minimize the grinding and compacting of the Molding compounds between the inlet edges of the feed channel and Ridges of the cell roller prefer deep cells.

Der das Gehäuse der Zellenwalze durchdringende Zuführkanal schließt beispielsweise mit der Senkrechten einen Winkel von 20 bis 50° ein. Der Winkel wird im allgemeinen von den Raumverhältnissen innerhalb der Tablettiermaschine vorgegeben. In manchen Fällen ist auch ein senkrecht ausgerichteter Zuführkanal möglich.The feed channel penetrating the housing of the cell roller makes an angle of, for example, with the vertical 20 to 50 °. The angle is generally dependent on the spatial conditions predefined within the tableting machine. In in some cases there is also a vertically aligned feed channel possible.

Ferner schneidet die gedachte Mittellinie des Zuführkanals die Rotationsachse der Zellenwalze, vorzugsweise im Bereich der halben Länge. Dadurch ist die Schüttmengenverteilung innerhalb einer Zelle spiegelsymmetrisch zur Querschnittsfläche in Zellenmitte.Furthermore, the imaginary center line of the feed channel intersects the Rotation axis of the cell roller, preferably in the area of half length. As a result, the bulk quantity distribution is within of a cell mirror-symmetrical to the cross-sectional area in the center of the cell.

Bei einem schräg verlaufenden Zuführkanal, der zudem das Gehäuse der Zellenwalze senkrecht und mittig schneidet, wird für die Zellenwalze eine Drehrichtung gewählt, bei der die in die Zelle rieselnde Preßmasse zunächst durch die Drehung der Zellenwalze angehoben wird. D.h., die Zelle bewegt sich auf ihrer Kreisbahn um ihre Rotationsachse noch ein Stück weit aufwärts, bevor sie den höchsten Punkt erreicht hat. Dadurch ist die abwärts führende Schwenkbewegung der einzelnen befüllten Zellen ab dem höchsten Punkt kleiner als 180°. Folglich fällt die Preßmasse vor einem Erreichen des horizontal verlaufenden Gehäusebereichs in den unteren Teil des Zuführkanals bzw. direkt in den Füllschuh. Die Preßmasse wird dabei nicht mit Hilfe der Stege bzw. Zellenzwischenwände durch das Gehäuse geschoben.With an inclined feed channel, which also the housing the cell roller cuts vertically and in the center, is for the cell roller selected a direction of rotation in which the Cell trickling molding compound first by rotating the cell roller is raised. That is, the cell moves on it Circular path a little further up around its axis of rotation, before it reaches the highest point. This makes it down leading pivoting movement of the individual filled cells from the highest point less than 180 °. Consequently, the falls Molding compound before reaching the horizontal housing area in the lower part of the feed channel or directly in the filling shoe. The molding compound is not with the help of Ridges or cell partitions are pushed through the housing.

Die Zellenwalze wird von einem Gleichstrommotor mit einem Tachogenerator angetrieben. Der Tachogenerator ermöglicht eine Drehzahlüberwachung des Gleichstrommotors. Am Gleichstrommotor ist ein Getriebe angeflanscht, mit dem die Motordrehzahl ins Langsame übersetzt wird. Zwischen der Getriebeausgangswelle und der Welle der Zellenwalze ist vorzugsweise eine drehstarre, bewegliche oder eine drehelastische Kupplung angeordnet.The cell roller is powered by a DC motor with a tachometer generator driven. The tachometer generator enables one Speed monitoring of the DC motor. On the DC motor a gearbox is flanged with which the engine speed ins Slow is translated. Between the transmission output shaft and the shaft of the cell roller is preferably a torsionally rigid, Movable or a torsionally flexible coupling arranged.

Der Antrieb der Zellenwalze kann auch geregelt betrieben werden. Dazu ist mindestens im Füllschuh ein Füllstandssensor untergebracht. Er sitzt vorzugsweise im vorderen Bereich des Füllschuhes, der von der Preßmassenzuführung am weitesten entfernt liegt. In diesem Bereich staut sich durch die Relativbewegung zwischen dem Tablettiertisch und dem Füllschuh die Preßmasse. Ein dort in einer oberen Füllschuhzone angeordneter Sensor, der beispielsweise kapazitiv oder induktiv arbeitet, erkennt den Befüllungsgrad. Entsprechend diesem Befüllungsgrad veranlaßt eine Regelung eine Drehzahländerung am Gleichstrommotor. Diese Regelung ist dabei nur indirekt abhängig von der Preßleistung der Tablettiermaschine.The drive of the cell roller can also be operated in a controlled manner. For this purpose, a fill level sensor is accommodated at least in the fill shoe. It is preferably located in the front area of the Filler shoe that is furthest away from the molding compound feed lies. The relative movement jams in this area between the tablet table and the filling shoe Molding compound. One arranged there in an upper filling shoe zone Sensor that works, for example, capacitively or inductively, recognizes the degree of filling. According to this degree of filling a regulation causes a speed change on the DC motor. This regulation is only indirectly dependent on the Press performance of the tableting machine.

Mit der zuvor beschriebenen Zuführeinrichtung kann der Volumenstrom der den Füllschuh durchlaufenden Preßmasse durch Drehzahländerungen in einen weiten Bereich variiert werden. Bei besonders problematischen Preßmassen sind zu große Drehzahlen unerwünscht, da sich solche Preßmassen an den sich erwärmenden Zellenzwischenwänden festsetzen. Zur Erhöhung des Volumenstroms ohne Drehzahlerhöhung können die Querschnittsflächen der Zellen entlang der Rotationsachse vergrößert werden, z.B. durch Zunahme der Zellentiefe. Ferner kann die Zellenwalze eine kegelstumpfförmige Grundform haben. Bei dieser Form lassen sich bei gleichbleibender Stärke der Zellenzwischenwände sehr große Zellenquerschnittsänderungen entlang der Rotationsachse realisieren. With the supply device described above, the volume flow of the molding compound passing through the filling shoe Speed changes can be varied over a wide range. For particularly problematic molding compounds, the speeds are too high undesirable because such molding compounds on the warming Fix cell partitions. To increase the The cross-sectional areas can achieve volume flow without increasing the speed the cells are enlarged along the axis of rotation, e.g. by increasing the cell depth. Furthermore, the cell roller have a frustoconical basic shape. At this Shape can be maintained with the same thickness of the cell walls very large changes in cell cross section along the Realize the axis of rotation.

Wird nun ein Teil des oberhalb des Gehäuses der Zellenwalze angeordneten Zuführkanals über die Länge des Gehäuses seitlich verschiebbar angeordnet, so befindet sich unter jeder Verschiebeposition ein anderer Zellenquerschnitt.Now becomes part of the above the housing of the cell roller arranged feed channel along the length of the housing slidably arranged, so is located under each shift position another cell cross section.

Eine weitere Alternative besteht darin, die Zellenwände zwischen den starren Zellenzwischenwänden aus flexiblem Material herzustellen. Beispielsweise können dort elastische Folien angebracht werden, die mittels einer Spannvorrichtung z.B. zur Rotationsachse oder eine zu ihr seitlich versetzten Achse hin gezogen werden. Dadurch entstehen Zellen mit v-förmigem Querschnitt, deren Tiefe von der jeweiligen Vorspannung abhängig ist.Another alternative is to between the cell walls the rigid cell partition walls made of flexible material to manufacture. For example, elastic foils can be attached there which are e.g. to Axis of rotation or an axis laterally offset to it to be pulled. This creates cells with a V-shaped cross-section, the depth of which depends on the respective preload is.

Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung einer schematisch dargestellten Ausführungsform:

Figur 1:
Schnitt einer Zuführeinrichtung mit Dosiereinrich tung,
Figur 2:
Vorderansicht mit Teilschnitt zu Figur 1.
Further details of the invention result from the following description of a schematically represented embodiment:
Figure 1:
Section of a feed device with metering device,
Figure 2:
Front view with partial section to Figure 1.

Figur 1 und 2 zeigen eine Einrichtung zur Zuführung von Preßmasse aus einem Vorratsbehälter (5) in einen Füllschuh (10). Die Einrichtung ist oberhalb eines Tablettiertischs (1) einer Tablettiermaschine angeordnet.Figures 1 and 2 show a device for feeding molding compound from a storage container (5) into a filling shoe (10). The device is one above a tray table (1) Tableting machine arranged.

Unmittelbar über dem Tablettiertisch (1) ist der Füllschuh (10) angeordnet. Er deckt eine Vielzahl von Preßkammern (2) ab. Der Füllschuh (10), unter dem der Tablettiertisch (1) hindurchgleitet, weist in seinem Innenbereich mehrere Leitbleche (11) zur Anhäufung der Preßmasse über den Preßkammern (2) auf. Im oberen Bereich einer Seitenwand ist ein Füllstandssensor (12) angebracht.The filling shoe is directly above the tablet table (1) (10) arranged. It covers a variety of bale chambers (2) off. The filling shoe (10) under which the tablet table (1) slides through, has several in its interior Baffles (11) for the accumulation of the molding compound over the Bale chambers (2). In the upper area of a side wall is a level sensor (12) attached.

Ein Zuführkanal (20) verbindet den Füllschuh (10) über die Dosiereinrichtung (30) mit dem Vorratsbehälter (5). Der obere, rohrförmige Teil (21) des Zuführkanals (20) schneidet annähernd mittig das quer angeordnete, zylindrische Gehäuse (31) der Dosiereinrichtung (30). Der untere Teil des Zuführkanals (20) besteht aus einem am Gehäuse (31) angeschlossenen Flachtrichter (22), der die Verbindung zum Füllschuh (10) herstellt. Der Flachtrichter (22) ist so gestaltet, daß seine Seitenflächen nahezu bis an den seitlichen Gehäuserand heranreichen. Die beiden oberen und unteren Trichterflächen haben am Gehäuse (31) gegeneinander einen Abstand, der ungefähr dem Durchmesser des oberen Teils (21) des Zuführkanals (20) entspricht. Die obere Trichterfläche ist mit einer Öffnung versehen, die mit einem Deckel (23) verschlossen ist. Der Deckel (23) umgreift mit trapezförmigen Rastnasen den unteren Teil des Zuführkanals (20), wobei die vorderen Enden der Rastnasen an der unteren Trichterfläche anliegen. Über die Öffnung kann der untere Teil des Zuführkanals (20) ohne aufwendige Demontagen gereinigt werden. Selbstverständlich kann der Deckel (23) auch auf eine andere Weise ausgeführt und befestigt werden.A feed channel (20) connects the filling shoe (10) via the metering device (30) with the storage container (5). The upper, tubular part (21) of the feed channel (20) cuts approximately in the middle the transversely arranged, cylindrical housing (31) the metering device (30). The lower part of the feed channel (20) consists of one connected to the housing (31) Flat funnel (22), which creates the connection to the filling shoe (10). The flat funnel (22) is designed so that its Side surfaces almost reach the side of the case. Have the two top and bottom funnel surfaces on the housing (31) from each other a distance which is approximately that Diameter of the upper part (21) of the feed channel (20) corresponds. The upper funnel surface is provided with an opening, which is closed with a lid (23). The Cover (23) grips the lower one with trapezoidal locking lugs Part of the feed channel (20), the front ends of the locking lugs rest on the lower funnel surface. Over the opening can the lower part of the feed channel (20) without expensive disassembly getting cleaned. Of course, the Cover (23) also executed and attached in a different way become.

Im Gehäuse (31), das an seinen Stirnseiten durch zwei Gehäusedeckel (32) verschlossen ist, ist eine Zellenwalze (35) angeordnet. Die Zellenwalze (35), die beispielsweise mittels eines Querpreßsitzes auf einer Welle (39) sitzt, ist dazu in Lagerbuchsen (33), vgl. Figur 2, gleitgelagert, die in den Gehäusedeckeln (32) zentral eingelassen sind. Die Gehäusedeckel (32) sind über Feingewinde auf dem Gehäuse (31) aufgeschraubt. In the housing (31), which has two housing covers at its ends (32) is closed, a cell roller (35) is arranged. The cell roller (35), for example by means of a Cross press seat on a shaft (39) is in bearing bushes (33), cf. Figure 2, plain bearings in the housing covers (32) are let in centrally. The housing cover (32) are screwed onto the housing (31) using fine threads.

Die Zellenwalze (35) hat hier eine zylindrische Außenkontur, in die parallel zu ihrer Rotationsachse beispielsweise acht nutförmige Zellen (36) mit konstanter Teilung eingefräst sind. Die Breite der Zellen ist im Bereich der zylindrischen Außenkontur so gewählt, daß die Stege (37) zwischen den benachbarten Zellen (36) dünnwandig ausfallen. Die Zellenwalze ist bei der dargestellten Ausführungsform beidseitig mit Hilfe der Randscheiben (38) begrenzt, Die Randscheiben (38) sind ebenfalls über einen Querpreßsitz auf der Welle (39) aufgeschrumpft.The cell roller (35) has a cylindrical outer contour here, for example eight parallel to their axis of rotation groove-shaped cells (36) are milled with a constant pitch. The width of the cells is in the area of the cylindrical outer contour chosen so that the webs (37) between the adjacent Cells (36) turn out thin-walled. The cell roller is at the illustrated embodiment on both sides with the help of Edge discs (38) limited, The edge discs (38) are also shrunk onto the shaft (39) using a cross press fit.

Als Antrieb für die Zellenwalze (35) wird ein Gleichstrommotor (40) mit einem Vorsatzgetriebe (42) und einem Tachogenerator (41) verwendet. Der Getriebeausgang des Vorsatzgetriebes (42) ist mit der Welle (39) der Zellenwalze (35) über ein Zugmittelgetriebe gekuppelt. Dazu sitzt auf der Welle des Vorsatzgetriebes (42) ein Antriebsrad (46) und auf der Welle (39) ein Abtriebsrad (47). Beide Räder (46, 47) sind über ein Zugmittel (45) verbunden. Das Zugmittel (47) kann ein Zahnriemen, ein Flachriemen oder dergleichen sein. Das Zugmittelgetriebe verbindet elastisch das Vorsatzgetriebe (42) mit der Zellenwalze (35).A DC motor is used to drive the cell roller (35) (40) with an attachment gear (42) and a tachometer generator (41) used. The gearbox output of the auxiliary gear (42) is connected to the shaft (39) of the cell roller (35) Coupling gear coupled. For this sits on the shaft of the auxiliary gear (42) a drive wheel (46) and on the shaft (39) an output gear (47). Both wheels (46, 47) are via a traction device (45) connected. The traction means (47) can be a toothed belt, a flat belt or the like. The traction mechanism connects the attachment gear (42) elastically to the cell roller (35).

Anstelle des Zugmittelgetriebes (45-47) kann der Antrieb (40-42) auch direkt neben der Zellenwalze (35) montiert sein. Zwischen dem Vorsatzgetriebe (42) und der Zellenwalze (35) ist dann eine elastische Kupplung, z.B. einen Bolzenkupplung, angeordnet. Instead of the traction mechanism gear (45-47), the drive (40-42) also be mounted directly next to the cell roller (35). Between the attachment gear (42) and the cell roller (35) then an elastic coupling, e.g. a bolt coupling arranged.

BEZUGSZEICHENLISTE:REFERENCE SIGN LIST:

11
TablettiertischTray table
22nd
PreßkammernBale chambers
55
VorratsbehälterStorage container
1010th
FüllschuhFilling shoe
1111
LeitblecheBaffles
1212th
FüllstandssensorLevel sensor
2020th
ZuführkanalFeed channel
2121
rohrförmiges Teil, oberer Zuführkanaltubular part, upper feed channel
2222
FlachtrichterFlat funnel
2323
Deckel für den FlachtrichterLid for the flat funnel
3030th
DosiereinrichtungDosing device
3131
Gehäusecasing
3232
GehäusedeckelHousing cover
3333
LagerbuchsenBearing bushes
3535
ZellenwalzeCell roll
3636
ZellenCells
3737
Stege, ZellenzwischenwändeBridges, cell partitions
3838
RandscheibenEdge discs
3939
Wellewave
4040
GleichstrommotorDC motor
4141
TachogeneratorTachometer generator
4242
VorsatzgetriebeAttachment gear
4545
Zugmittel, ZahnriemenTraction means, timing belt
4646
Antriebsraddrive wheel
4747
AbtriebsradOutput gear

Claims (9)

  1. Device in tableting machines for feeding in materials to be compressed, especially those which are problematic in terms of their flowability, in which a controllable or regulatable metering device (30) is arranged in a feed duct (20) which ends in a filling shoe (10), characterized in that
    the metering device (30) has a motor-driven multi-compartment roll (35) which is surrounded by a casing (31, 32) and has at least four compartments (36), the horizontally or approximately horizontally aligned axis of rotation of the multi-compartment roll (35) being arranged transversely to the feed duct (20) and the diameter of the multi-compartment roll (35) in each case being more than twice the inside diameter or twice the width, measured transversely to the multi-compartment roll (35), of the upper part (21) of the feed duct (20), the said upper part opening into the casing (31, 32), and
    in that the length of the compartments (36) is greater than the bottom of a charge of the material to be compressed flowing out of the feed duct (20).
  2. Feed device according to Claim 1, characterized in that the compartments (36) extend parallel to the axis of rotation and, at the base of the compartment, have an approximately semicircular cross-sectional contour, the compartment depth corresponding to at least half the maximum compartment width.
  3. Feed device according to Claim 1, characterized in that the feed duct (20) encloses an angle of 20 to 50° to the vertical.
  4. Feed device according to Claim 1, characterized in that the imaginary centre line of the feed duct (20) intersects the axis of rotation of the multi-compartment roll (35).
  5. Feed device according to Claim 1, characterized in that the inner contour of the casing (31, 32) largely corresponds to the envelope contour of the multi-compartment roll (35).
  6. Feed device according to Claim 1, characterized in that the multi-compartment roll (35) is driven by a DC motor (40) with a tachogenerator (41).
  7. Feed device according to Claim 1, characterized in that the multi-compartment roll (35) is coupled to the DC motor (40) by a flexible transmission (45-47).
  8. Feed device according to Claim 1, characterized in that a filling-level sensor (12) is arranged in the filling shoe (10).
  9. Feed device according to at least one of the preceding claims, characterized in that the cross-sectional areas of the compartments (36) increase along the axis of rotation and in that part of the feed duct (20) arranged above the casing (31) is arranged there in such a way that it can be displaced sideways over the length of the casing (31).
EP96907354A 1996-03-06 1996-03-06 Device for feeding moulding masses to tablet-compressing machines Expired - Lifetime EP0885113B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1996/000926 WO1997032716A1 (en) 1996-03-06 1996-03-06 Device for feeding moulding masses to tablet-compressing machines

Publications (2)

Publication Number Publication Date
EP0885113A1 EP0885113A1 (en) 1998-12-23
EP0885113B1 true EP0885113B1 (en) 2000-04-26

Family

ID=8166171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96907354A Expired - Lifetime EP0885113B1 (en) 1996-03-06 1996-03-06 Device for feeding moulding masses to tablet-compressing machines

Country Status (5)

Country Link
EP (1) EP0885113B1 (en)
JP (1) JP2000506070A (en)
AT (1) ATE192075T1 (en)
DE (1) DE59605077D1 (en)
WO (1) WO1997032716A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022680B3 (en) * 2007-05-11 2008-11-13 Coperion Waeschle Gmbh & Co. Kg Cellular wheel sluice, has cellular wheel drive with coupling, which allows relative rotation of drive shaft relative to other drive from neutral position at more than five degrees at longitudinal axis of shaft
EP3964732A1 (en) 2020-09-04 2022-03-09 SL-Technik GmbH 3-point torque support
US11635231B2 (en) 2019-09-03 2023-04-25 Sl-Technik Gmbh Rotating grate with a cleaning device for a biomass heating system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1489161B1 (en) * 2002-03-27 2005-06-01 Bostlan, S.A. Method for the production of high-concentration manganese mini-tablets for alloying aluminum baths and device for implementing said method
CN114474833B (en) * 2022-01-04 2023-09-08 安徽百盛药业有限公司 Tabletting device for processing health food

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE595130C (en) * 1931-02-03 1934-04-07 Buckau R Wolf Akt Ges Maschf Device for feeding the pressed material to briquette extrusions
DE666824C (en) * 1935-11-24 1938-10-28 Vereinigungsgesellschaft Rhein Coal feed device in briquette extrusion presses
US2514486A (en) * 1945-11-21 1950-07-11 Lee B Green Molding machine
FR1319467A (en) * 1962-02-05 1963-03-01 Device for leveling and pre-agglomerating powdered material in molds supplied by carriages of agglomerating presses of any type
US4238058A (en) * 1978-06-26 1980-12-09 M & S Industries, Inc. Body construction for rotary valve
DE3609869A1 (en) * 1986-03-22 1987-09-24 Bernhard Boeckenholt Device for pressing material to be pressed

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022680B3 (en) * 2007-05-11 2008-11-13 Coperion Waeschle Gmbh & Co. Kg Cellular wheel sluice, has cellular wheel drive with coupling, which allows relative rotation of drive shaft relative to other drive from neutral position at more than five degrees at longitudinal axis of shaft
US11635231B2 (en) 2019-09-03 2023-04-25 Sl-Technik Gmbh Rotating grate with a cleaning device for a biomass heating system
US11708999B2 (en) 2019-09-03 2023-07-25 Sl-Technik Gmbh Biomass heating system with optimized flue gas treatment
EP3964732A1 (en) 2020-09-04 2022-03-09 SL-Technik GmbH 3-point torque support
WO2022048769A1 (en) 2020-09-04 2022-03-10 Sl-Technik Gmbh 3-point torque support

Also Published As

Publication number Publication date
ATE192075T1 (en) 2000-05-15
DE59605077D1 (en) 2000-05-31
EP0885113A1 (en) 1998-12-23
JP2000506070A (en) 2000-05-23
WO1997032716A1 (en) 1997-09-12

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