EP1053863B1 - Apparatus for manufacturing moulded articles - Google Patents
Apparatus for manufacturing moulded articles Download PDFInfo
- Publication number
- EP1053863B1 EP1053863B1 EP00109494A EP00109494A EP1053863B1 EP 1053863 B1 EP1053863 B1 EP 1053863B1 EP 00109494 A EP00109494 A EP 00109494A EP 00109494 A EP00109494 A EP 00109494A EP 1053863 B1 EP1053863 B1 EP 1053863B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filling shoe
- die plate
- distance
- height
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- 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
-
- 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
Definitions
- the invention relates to a device for the production of compacts, preferably a tablet machine, according to the preamble of claim 1.
- a filling shoe for a tablet machine has become known in which the filling shoe is arranged on a base in a small portion above the die plate.
- a vertical plate of the base has a vertical slot through which a Locking screw is guided, which cooperates with a threaded bore of a plate of the filling shoe to adjust the filling shoe by hand at a predetermined distance from the die plate.
- a filling shoe has become known, which can be brought by means of servo motors in a predetermined position on a die table of a powder press. The filling shoe rests on the die table and is moved back and forth between a filling position and a waiting position.
- the object of the invention is to remedy the aforementioned maladministration.
- the dosage should be further improved and the occurrence of black spots on the surface of the compact or tablet should be minimized.
- the bottom plate of the filling shoe is mounted on a height-adjustable base via a motor arranged in the machine frame.
- a measuring device is provided, via which the distance between the bottom plate of the filling shoe and the surface of the rotating die plate is measured.
- an output device for the measured values can serve here.
- the gap width can be ensured by means of a control loop in which the gap width is adjustable as a controlled variable, even if height differences occur during the rotational movement of the rotating die plate.
- FIGURE shows a schematic schematic diagram of an embodiment of the present invention.
- a machine frame 12 In a machine frame 12 is a die plate 14 via a motor, not shown here in the direction of arrow a in stepwise rotation displaceable. By this stepwise rotation each a not shown here compression chamber (die) is brought to receive the contents to be pressed in their receiving position.
- the receiving position is defined by a stationary filling shoe 16, over which the product to be pressed is introduced.
- a filling shoe 16 may be used, for example, a well-known in the art Rhackeriel spallschuh.
- the filling shoe 16 is on a base plate 18 on a sock! 20 is mounted so that it is positioned in the manner shown in the figure to the rotating die plate 14. In this partially overlapping position results in a gap 22, the width of which depends on the distance between the underside of the bottom plate 18 of the filling shoe 16 and the surface of the rotating die plates 14.
- a high-precision servo motor 15 in the double arrow direction b is adjustable. In this case, the rotational movement of the servo motor 15 can be transmitted by any gear on the base 20.
- the servo motor 15 and the transmission are designed so that a Setting the width of the gap 22 to 100th mm is possible
- the width of the gap 22 can be measured here in a manner not shown in detail in the figure by means of a measuring device and represented graphically by means of an output device.
- the respectively optimally set values can be detected reproducibly.
- the values can also be stored in an electronic memory.
- the width of the gap 22 can also serve as a control variable of a control loop. In this way, an optimal distance between the filling shoe 16 and the die plate 14 can be adjusted, based on empirical values for certain feedstocks to be pressed in a machine otherwise known in its design.
Description
Die Erfindung betrifft eine Vorrichtung zur Herstellung von Preßlingen, vorzugsweise eine Tablettenmaschine, nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for the production of compacts, preferably a tablet machine, according to the preamble of claim 1.
Bei der Herstellung von Preßlingen aller Art und insbesondere bei der Tablettenherstellung kommt der Dosierung des Einfüllgutes, d.h. der Preßmasse, vor allem bei der Verwendung von Hochleistungspressen, besondere Bedeutung zu. Derartige Hochleistungspressen bestehen im wesentlichen nach dem Stand der Technik aus einer rotierenden Matrizenplatte und einem diesem zugeordneten stationären Füllschuh zum Einfüllen des in der Matrize zu pressenden Einsatzmaterials.In the production of compacts of all kinds and in particular in the manufacture of tablets, the metering of the contents to be filled, i. the molding compound, especially when using high-performance presses, special importance. Such high-performance presses consist essentially of the prior art of a rotating die plate and a stationary Füllschuh associated therewith for filling the to be pressed in the die feed.
Während die Dosiergenauigkeit durch den Einsatz von modifizierbaren Rührflügelschuhen auch bei hohen Leistungen gewährleistet werden kann, hat das Füllprinzip, das durch die Kombination des ortsfesten Füllschuhs über der rotierenden Matrizenscheibe gekennzeichnet ist, zur Folge, daß relativ hohe Materialverluste hingenommen werden müssen. Zwischen Füllschuh und Matrizenscheibe ist in der Regel eine Dichtleiste vorgesehen. Bei nicht exakter Einstellung des Füllschuhes kann es zum Metallabrieb bei den Füllschuhdichtleisten kommen. Der Metallabrieb kann in das zu fertigende Produkt gelangen, wodurch die sogenannten schwarzen Recken entstehen.While the dosing accuracy can be ensured by the use of modifiable Rührschwügelschuhen even at high power, the filling principle, which is characterized by the combination of the stationary Füllschuhs over the rotating die plate, with the result that relatively high material losses must be accepted. Between filling shoe and die plate a sealing strip is usually provided. If the filling shoe is not set exactly, it can lead to metal abrasion in the filling shoe sealing strips. The metal abrasion can get into the product to be produced, whereby the so-called black stretching arise.
Bislang wird versucht, diese Problematik durch eine möglichst genaue Einstellung des Abstandes zwischen dem Füllschuh und der Matrizenscheibe vor der Inbetriebnahme zu lösen. Hier kommt es auf die Geschicklichkeit des Maschineneinrichters an, den Materialverlust zu optimieren und gleichzeitig den Abrieb der Dichtleisten zu minimieren. Während der laufenden Produktion ist es dann nicht mehr möglich, produktabhängige Korrekturen der Einstellung durchzuführen.So far, it is attempted to solve this problem by setting as accurately as possible the distance between the filling shoe and the die plate before commissioning. Here, it depends on the skill of the machine installer to optimize the loss of material and at the same time to minimize the abrasion of the sealing strips. During ongoing production, it is then no longer possible to make product-dependent corrections to the setting.
Aus US-A-4108338 ist ein Füllschuh für eine Tablettenmaschine bekannt geworden, bei der der Füllschuh an einem Sockel in geringem Abschnitt oberhalb der Matrizenscheibe angeordnet ist Eine vertikale Platte des Sockels weist einen vertikalen Schlitz auf, durch welchen eine Feststellschraube geführt ist, die mit einer Gewindebohrung einer Platte des Füllschuhs zusammenwirkt, um den Füllschuh von Hand in einem vorgegebenen Abstand zur Matrizenscheibe einzustellen. Aus EP-A-0399281 ist ein Füllschuh bekannt geworden, der mit Hilfe von Stellmotoren in einer vorgegebene Lage auf einen Matrizentisch einer Pulverpresse gebracht werden kann. Der Füllschuh liegt auf dem Matrizentisch auf und wird zwischen einer Füllposition und einer Warteposition hin und her bewegt.From US-A-4108338 a filling shoe for a tablet machine has become known in which the filling shoe is arranged on a base in a small portion above the die plate. A vertical plate of the base has a vertical slot through which a Locking screw is guided, which cooperates with a threaded bore of a plate of the filling shoe to adjust the filling shoe by hand at a predetermined distance from the die plate. From EP-A-0399281 a filling shoe has become known, which can be brought by means of servo motors in a predetermined position on a die table of a powder press. The filling shoe rests on the die table and is moved back and forth between a filling position and a waiting position.
Aufgabe der Erfindung ist es, dem vorgenannten Mißstand abzuhelfen. Insbesondere soll die Dosierung weiter verbessert werden und das Auftreten schwarzer Flecken auf der Oberfläche des Preßlings bzw. der Tablette soll minimiert werden.The object of the invention is to remedy the aforementioned maladministration. In particular, the dosage should be further improved and the occurrence of black spots on the surface of the compact or tablet should be minimized.
Diese Aufgabe wird erfindungsgemäß durch die Kombination der Merkmale des Anspruchs 1 gelöst. Demnach wird ausgehend von einer Vorrichtung zur Herstellung von Preßlingen und insbesondere von Tabletten, gemäß dem Oberbegriff des Anspruchs 1 der Füllschuh über einen Stellmotor gegenüber der Oberfläche der rotierenden Matrizenplatte höheneinstellbar gelagert. Dadurch ist es möglich, durch höchst genaue Einjustierung, die im Bereich von 100stel mm liegen kann, den Abstand zwischen der Bodenplatte des Füllschuhs und der Matrizenscheibe soweit zu optimieren, daß in Abhängigkeit von der Zusammensetzung und Kömung des zu pressenden Gutes der Materialverlust individuell minimiert werden kann, wobei andererseits der Abstand so gewählt werden kann, daß es nicht zu einem Abrieb der Dichtleisten und somit zur Bildung der zu vermeidenden schwarzen Flecken kommt.This object is achieved by the combination of the features of claim 1. Accordingly, starting from a device for the production of compacts and in particular of tablets, according to the preamble of claim 1, the filling shoe via a servo motor relative to the surface of the rotating die plate mounted in height adjustable. This makes it possible, by highly accurate Einjustierung, which may be in the range of 100stel mm, to optimize the distance between the bottom plate of the filling shoe and the die plate so far that depending on the composition and Kömung of the material to be pressed, the material loss can be minimized individually can, on the other hand, the distance can be chosen so that it does not lead to abrasion of the sealing strips and thus to the formation of the black spots to be avoided.
Die Bodenplatte des Füllschuhs ist auf einen über einen im Maschinengestell angeordneten Motor höhenverstellbaren Sockel montiert. Darüber hinaus ist eine Meßvorrichtung vorgesehen, über die der Abstand zwischen der Bodenplatte des Füllschuhs und der Oberfläche der rotierenden Matrizenscheibe gemessen wird. Hierdurch sind die auf die Produktqualität abgestellten Einstellwerte zum einen überwachbar und zum anderen reproduzierbar erfaßbar. Hier zu kann insbesondere eine Ausgabevorrichtung für die gemessenen Werte dienen.The bottom plate of the filling shoe is mounted on a height-adjustable base via a motor arranged in the machine frame. In addition, a measuring device is provided, via which the distance between the bottom plate of the filling shoe and the surface of the rotating die plate is measured. As a result, the setting values which are set to the product quality can be monitored and reproducibly detected on the one hand. In particular, an output device for the measured values can serve here.
Um eine Konstanz des optimierten Spaltabstands sicherzustellen, kann die Spaltbreite mittels eines Regelkreises, in welchem die Spaltbreite als Regelgröße einstellbar ist, selbst dann gewährleistet sein, wenn während der Rotationsbewegung der rotierenden Matrizenscheibe Höhendifferenzen auftreten.In order to ensure a constancy of the optimized gap distance, the gap width can be ensured by means of a control loop in which the gap width is adjustable as a controlled variable, even if height differences occur during the rotational movement of the rotating die plate.
Weitere Einzelheiten und Vorteile der Erfindung werden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Die einzige Figur zeigt eine schematisch angelegte Prinzipskizze einer Ausführungsform der vorliegenden Erfindung.Further details and advantages of the invention will be explained with reference to an embodiment shown in the drawing. The single FIGURE shows a schematic schematic diagram of an embodiment of the present invention.
Mit 10 ist in der Figur eine in ihrer Bauweise bekannte Maschine zur Herstellung von Tabletten bezeichnet. Da der Aufbau einer derartigen Maschine (Tablettenpresse) bekannt ist, wird auf die detaillierte Beschreibung des Aufbaus einer solchen Maschine an dieser Stelle verzichtet. Es werden nur die 10 beschrieben, die zum Verständnis der Erfindung notwendig sind.With 10 in the figure is known a known in their construction machine for the production of tablets. Since the structure of such a machine (tablet press) is known, the detailed description of the structure of such a machine will be omitted here. Only those 10 that are necessary for understanding the invention will be described.
In einem Maschinengestell 12 ist eine Matrizenscheibe 14 über einen hier nicht dargestellten Motor in Richtung des Pfeiles a in schrittweise Rotation versetzbar. Durch diese schrittweise Rotation wird jeweils eine hier nicht näher dargestellte Preßkammer (Matrize) zur Aufnahme des zu pressenden Füllgutes in ihre Aufnahmeposition gebracht. Die Aufnahmeposition wird durch einen stationären Füllschuh 16 definiert, über den das zu pressende Füllgut eingeführt wird. Als Füllschuh 16 kann beispielsweise ein im Stand der Technik bekannter Rührflügelfüllschuh verwendet werden.In a
Der Füllschuh 16 ist über eine Bodenplatte 18 auf einem Socke! 20 derart montiert, daß er in der in der Figur dargestellten Art und Weise zu der rotierenden Matrizenscheibe 14 positioniert ist. In dieser teilweise überdeckenden Position ergibt sich ein Spalt 22, dessen Breite vom Abstand zwischen der Unterseite der Bodenplatte 18 des Füllschuhs 16 und der Oberfläche der rotierenden Matrizenscheiben 14 abhängt. Zur Einstellung der Breite des Spaltes 22 ist der Sockel 20 über einen hoch genauen Stellmotors 15 in Doppelpfeilrichtung b verstellbar. Dabei kann die Rotationsbewegung des Stellmotors 15 durch ein beliebiges Getriebe auf den Sockel 20 übertragen werden. Der Stellmotor 15 und das Getriebe sind jedoch so ausgelegt, daß eine Einstellung der Breite des Spaltes 22 auf 100stel mm möglich istThe
Die Breite des Spaltes 22 kann hier in einer in der Figur nicht näher dargestellter Art und Weise mittels einer Meßvorrichtung gemessen werden und mittels einer Ausgabeeinrichtung graphisch dargestellt werden. Hierdurch können die jeweils optimiert eingestellten Werte reproduzierbar erfaßt werden. Anstelle einer graphischen Darstellung können die Werte auch in einem elektronischen Speicher abgelegt werden.The width of the
Weiterhin kann die Breite des Spaltes 22 auch als Regelgröße eines Regelkreises dienen. Hierdurch kann ein optimaler Abstand zwischen dem Füllschuh 16 und der Matrizenscheibe 14 eingestellt werden, der auf Erfahrungswerten für bestimmte zu pressende Einsatzstoffe in einer in ihrer Bauweise ansonsten bekannten Maschine beruhen.Furthermore, the width of the
Claims (3)
- Apparatus for manufacturing moulded articles, preferably a tablet machine, with a rotating die plate (14) and a stationary filling shoe (16) assigned to it to fill in the material component to be pressed into the die of the die plate (14), whereby the filling shoe (16), which is mounted on a height-adjustable socket (20) via a base plate (20), is adjustable in height with respect to the surface of the rotating die plate, characterized in that the filling shoe (16) can be adjusted in height by means of a servo motor (15) and a measurement device is provided that measures the distance between the base plate (20) of the filling shoe (16) and the surface of the die plate (14).
- Apparatus in accordance with claim 1, characterized in that the distance values measured by the distance measuring device can be displayed using an output device.
- Apparatus in accordance with claim 1 or 2, characterized in that the distance values are a control variable of a control circuit for controlling the distance of the filling shoe (16) from the die plate (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29908594U | 1999-05-14 | ||
| DE29908594U DE29908594U1 (en) | 1999-05-14 | 1999-05-14 | Device for the production of compacts |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1053863A2 EP1053863A2 (en) | 2000-11-22 |
| EP1053863A3 EP1053863A3 (en) | 2002-07-10 |
| EP1053863B1 true EP1053863B1 (en) | 2006-03-01 |
Family
ID=8073572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00109494A Expired - Lifetime EP1053863B1 (en) | 1999-05-14 | 2000-05-04 | Apparatus for manufacturing moulded articles |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6612827B1 (en) |
| EP (1) | EP1053863B1 (en) |
| DE (2) | DE29908594U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102036811A (en) * | 2008-04-23 | 2011-04-27 | 欧伊斯塔曼内斯蒂公司 | Material supply for a tablet pressing machine, and a tablet pressing machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005030311B3 (en) * | 2005-06-23 | 2006-11-23 | Korsch Ag | Pressing process for tablets involves accelerating die table to nominal revs, bringing filling device into filling position and filling die |
| US7553436B2 (en) * | 2007-11-02 | 2009-06-30 | Metropolitan Computing Corporation | System and method for optimizing tablet formation by a rotary press machine |
| US20110024937A1 (en) * | 2009-07-30 | 2011-02-03 | Semen Dukler | Tablet Formation System for Fully-Loaded Presses |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3460487A (en) * | 1967-09-22 | 1969-08-12 | Sterling Drug Inc | Tablet forming machines |
| US4108338A (en) * | 1977-08-15 | 1978-08-22 | Pennwalt Corporation | Rotary tabletting press with powder feed adjustment valve |
| JP2610929B2 (en) * | 1988-03-02 | 1997-05-14 | 株式会社ヨシツカ精機 | Powdering equipment for powder molding press |
| DE3916951A1 (en) * | 1989-05-24 | 1990-11-29 | Graebener Theodor Pressensyst | FILLING DEVICE FOR AUTOMATICALLY FILLING THE MATRIX OF POWDER PRESSES |
| GB2255080B (en) * | 1991-04-09 | 1994-11-16 | British Nuclear Fuels Plc | An improved rotary press |
| DE19502841A1 (en) * | 1995-01-30 | 1996-08-01 | Dorst Masch & Anlagen | Powder press with mechanical and hydraulic transmission |
| JPH08294798A (en) * | 1995-04-26 | 1996-11-12 | Tamagawa Mach Kk | Powder feeding device and its control method |
| DE19533903C1 (en) * | 1995-09-13 | 1997-04-03 | Netzsch Erich Holding | Press especially for ceramic pulp |
| US5747073A (en) * | 1995-10-27 | 1998-05-05 | Tecsyn, Inc. | Apparatus for producing composite cylinders |
| US6183232B1 (en) * | 1996-12-18 | 2001-02-06 | Amsted Industries Incorporated | Raw material delivery system for compacting press |
-
1999
- 1999-05-14 DE DE29908594U patent/DE29908594U1/en not_active Expired - Lifetime
-
2000
- 2000-05-04 DE DE50012273T patent/DE50012273D1/en not_active Expired - Lifetime
- 2000-05-04 EP EP00109494A patent/EP1053863B1/en not_active Expired - Lifetime
- 2000-05-11 US US09/569,134 patent/US6612827B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102036811A (en) * | 2008-04-23 | 2011-04-27 | 欧伊斯塔曼内斯蒂公司 | Material supply for a tablet pressing machine, and a tablet pressing machine |
| CN102036811B (en) * | 2008-04-23 | 2014-10-15 | 博世包装技术有限公司 | Material supply for a tablet pressing machine, and a tablet pressing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1053863A2 (en) | 2000-11-22 |
| US6612827B1 (en) | 2003-09-02 |
| DE29908594U1 (en) | 1999-11-04 |
| EP1053863A3 (en) | 2002-07-10 |
| DE50012273D1 (en) | 2006-04-27 |
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