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EP2111972A2 - Punch for a rotary press - Google Patents

Punch for a rotary press Download PDF

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Publication number
EP2111972A2
EP2111972A2 EP09004314A EP09004314A EP2111972A2 EP 2111972 A2 EP2111972 A2 EP 2111972A2 EP 09004314 A EP09004314 A EP 09004314A EP 09004314 A EP09004314 A EP 09004314A EP 2111972 A2 EP2111972 A2 EP 2111972A2
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EP
European Patent Office
Prior art keywords
radius
head
height
cylindrical surface
stamp according
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.)
Granted
Application number
EP09004314A
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German (de)
French (fr)
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EP2111972A3 (en
EP2111972B1 (en
Inventor
Jürgen Schikowski
Friedrich Meissner
Jan Naeve
Harald Römer
Reinhard Wagner
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Fette GmbH
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Fette GmbH
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Publication of EP2111972A3 publication Critical patent/EP2111972A3/en
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Classifications

    • 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
    • B30B15/0076—Noise or vibration isolation means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams

Definitions

  • the invention relates to a stamp for a rotary press according to claim 1.
  • Rotary presses for the production of tablets and similar compacts have lower and upper punches, which cooperate with die bores in a die plate to process gefiilltes powder into compacts.
  • the molds with which the dies interact are referred to as dies, which are mounted as separate sleeve-like inserts in holes in the die plate.
  • dies which are mounted as separate sleeve-like inserts in holes in the die plate.
  • the use of segmented die disks has the advantage that when changing in the shape of the compact, removal of the die Matrices and the installation of new matrices can be omitted.
  • the matrices occupy a relatively large amount of space so that they limit the number of mold holes on a given pitch circle. Naturally, the number of mold holes in a die plate without
  • Press punches of the type mentioned have a punch head and a shaft.
  • the stamp head has at the top a mirror surface, which interact with pressure rollers in the rotary press.
  • the diameter of the mirror surface determines the pressure holding time of the ram, ie at a given speed, the time in which the ram interact with the powder to be pressed.
  • the press die heads also have a cylindrical surface, and between this and the mirror surface a rounded transition is arranged, wherein the transition has a relatively large radius to the underrun of the pressure rollers this only gradually to the effect to come.
  • At the bottom of the punch heads go in a mostly conical section in the shaft.
  • the mass of the dies of a rotary press and the associated inertia is a limiting factor for the engine speed and also crucial for the wear of punch heads and with these cooperating curves.
  • there is an unfavorable interaction between the pressure roller and the stamp head due to uneven transition of the pressure roller from one to the next stamp head. This causes a considerable noise emission and wear on punch and pressure roller.
  • the geometric design and dimensions of punch heads for rotary presses are normalized (DIN ISO 18084: 2006-09).
  • the diameter of the head, which is determined by the cylindrical surface is then either 25.27 or 31.6 mm, the diameter of the mirror surface is optionally 9.6 or 16 mm, the diameter of the shaft is 19 or 25.35 mm and the height of the head is 8.15 mm.
  • the invention has for its object to provide a stamp for a rotary press, which achieves a smaller size and thus a smaller distance of the stamp is possible.
  • the noise emission should be able to be reduced.
  • the diameter of the head is smaller than 25 mm, and the transition region is chosen so that its height is smaller than half the height of the cylindrical surface.
  • the radius of the transition region between mirror surface and cylindrical surface is relatively small compared to the normalized stamp head. In the latter, this radius is 16 mm. According to one embodiment of the invention, the first radius is smaller than 14 mm, preferably in the range of 9 to 11 mm.
  • a very small radius of 0.8 mm is provided between the rounded transition and the cylindrical surface.
  • the second radius corresponds to at least one fifth of the size of the first radius, preferably a quarter of the first radius.
  • the second radius is according to another embodiment of the invention 2 to 3 mm, preferably 2.5 mm.
  • the height of the cylindrical surface corresponds to at least half the height of the punch head.
  • the ratio of the height of the cylinder surface to the total height of the punch head is slightly less than 0.5, z. B. 0.47 - 0.48. (If the above and below of the height of the punch head is mentioned, then this means the entire height of the head from the mirror surface to the shaft).
  • the diameter of the shaft of the stamp according to the invention is relatively small. Conventionally, it is, as already mentioned, either 19 or 25.35 mm. According to one embodiment of the invention, the diameter of the shaft is ⁇ 19 mm. Preferably, the diameter is less than 14 mm, preferably between 11 and 13 mm.
  • the ratio diameter shaft to diameter mirror surface is less than 1.7, preferably about 1.5.
  • the punch according to the invention is preferably applicable to segmented die plates having mold holes without mold inserts (dies). According to one embodiment of the invention for this purpose, it is provided that the center distance of the punches on the pitch circle of the form of holes is less than 20 mm.
  • the number of stations on a particular pitch circle is significantly increased. Furthermore, the mass of the stamp is reduced. This reduces also the wear on punch heads and curves. The exact radius transition of the punch head not only allows the significant mass reduction, but also a more uniform transition of the pressure roller from one to the next stamp head. This reduces the noise emission as well as the wear on punches and pressure rollers.
  • Fig. 1 For example, some punches 10 are shown with a shaft 12 and a punch head 14. They are, what is not described and shown in detail, arranged in a punch guide of a rotor of a rotary press. Such rotary presses are well known, so that reference may be made thereto.
  • the punches 10 cooperate with mold bores of a die plate, also not shown, which is rotated together with the punches 10 about a vertical axis.
  • at least one pressure roller cooperates with the punch heads 14 to press the punch shanks or the press insert of the punch shafts into the die holes in order to press powder received therein into a compact. This too is not shown and is assumed to be known.
  • Fig. 1 how out Fig. 1 Furthermore, recognizable, the punch heads 14 have a very small distance from each other.
  • the center distance of the punch shafts 12 and the punch heads 14 is in Fig. 1 denoted by X.
  • Stamp head 14 and stamp shaft 12 are provided with dimensions. The dimensions are in millimeters.
  • the stamp head 14 has an upper mirror surface 16 with a diameter of 8 mm.
  • the stamp head 14 further has a cylindrical surface 20 with a diameter of 19 mm.
  • a first transition region 22 is provided with a radius of 10 mm.
  • Another transition region 24 has a radius of 2.5 mm.
  • a conical transition region 28 is formed with a cone angle of 30 °.
  • the height of the cylindrical surface 20 is 5.1 mm and the height of the punch head 14 10.7 mm.
  • the diameter of the shaft is 12 mm.
  • the two radii of the transition regions 22 and 24 are relatively small and allow a small size for the punch head 14.
  • the radius transition of the transition regions 24, 22 allows an optimum transition of the pressure roller from one stamp head to the next, so that the wear and the noise emission is minimized.
  • the stamp head allows for the Figures 1 and 2 a small size and thus a reduced mass.
  • the diameter of the mirror surface 16 moves within the scope of the usual, to keep the pressure holding time the same.
  • the height of the cylindrical surface 20 is approximately equal to conventional dimensions.
  • Significantly reduced is the height of the two transition regions 24, 22, resulting in the smaller size of the head.
  • the diameter of the shaft 12 is reduced compared to conventional Stempelfabften, so that over this mass is reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Powder Metallurgy (AREA)
  • Compressor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

Stempel (10) für eine Rundläuferpresse, der einen Schaft (12) und einen Kopf (14) aufweist, wobei der Kopf (14) eine obere Spiegelfläche (16), eine Zylinderfläche (20) und einen gerundeten Übergangsbereich zwischen Spiegelfläche (16) und Zylinderfläche (20) mit einem ersten und einem zweiten Radius aufweist, wobei der erste Radius größer als der zweite Radius ist und wobei der Stempelkopf ferner einen vorzugsweise konischen Übergangsbereich von der Zylinderfläche zum Schaft aufweist, wobei der Durchmesser des Kopfes (14) kleiner ist als 25 mm und der erste Radius des Übergangsbereichs so gewählt ist, dass seine Höhe kleiner ist als die halbe Höhe der Zylinderfläche (20).A rotary press puncher (10) comprising a shaft (12) and a head (14), the head (14) having an upper mirror surface (16), a cylindrical surface (20) and a rounded transition region between mirror surface (16) and Cylindrical surface (20) having a first and a second radius, wherein the first radius is greater than the second radius and wherein the punch head further has a preferably conical transition region from the cylindrical surface to the shaft, wherein the diameter of the head (14) is smaller than 25 mm and the first radius of the transition region is selected so that its height is less than half the height of the cylindrical surface (20).

Description

Die Erfindung bezieht sich auf einen Stempel für eine Rundläuferpresse nach dem Patentanspruch 1.The invention relates to a stamp for a rotary press according to claim 1.

Rundläuferpressen zur Herstellung von Tabletten und ähnlichen Presslingen weisen Unter- und Oberstempel auf, die mit Matrizenbohrungen in einer Matrizenscheibe zusammenwirken, um eingefiilltes Pulver zu Presslingen zu verarbeiten. Die Formen, mit der die Stempel zusammenwirken, werden als Matrizen bezeichnet, die als separate hülsenartige Einsätze in Bohrungen der Matrizenscheibe befestigt werden. Es ist jedoch auch bekannt, die Matrizenscheibe aus Segmenten zusammenzusetzen und die Formbohrungen unmittelbar in den Segmenten herzustellen. (Obwohl Matrizen bei derartigen Segmenten nicht verwendet werden, wird die Scheibe, welche aus den Segmenten zusammengesetzt ist, nach wie vor als Matrizenscheibe bezeichnet.) Die Verwendung von segmentierten Matrizenscheiben hat den Vorteil, dass bei einem Wechsel in der Form des Presslings das Ausbauen der Matrizen und das Einbauen neuer Matrizen entfallen kann. Darüber hinaus nehmen die Matrizen relativ viel Platz in Anspruch, so dass sie auf einem vorgegebenen Teilkreis die Anzahl der Formbohrungen begrenzen. Naturgemäß ist die Anzahl an Formbohrungen bei einer Matrizenscheibe ohne Matrizeneinsätze größer.Rotary presses for the production of tablets and similar compacts have lower and upper punches, which cooperate with die bores in a die plate to process gefiilltes powder into compacts. The molds with which the dies interact are referred to as dies, which are mounted as separate sleeve-like inserts in holes in the die plate. However, it is also known to assemble the die plate from segments and to produce the die holes directly in the segments. (Although dies are not used in such segments, the disk composed of the segments will still be referred to as the die disk.) The use of segmented die disks has the advantage that when changing in the shape of the compact, removal of the die Matrices and the installation of new matrices can be omitted. In addition, the matrices occupy a relatively large amount of space so that they limit the number of mold holes on a given pitch circle. Naturally, the number of mold holes in a die plate without die inserts is greater.

Pressstempel der genannten Art weisen einen Stempelkopf und einen Schaft auf. Der Stempelkopf weist an der Oberseite eine Spiegelfläche auf, die mit Druckrollen in der Rundläuferpresse zusammenwirken. Der Durchmesser der Spiegelfläche bestimmt die Druckhaltezeit der Pressstempel, d.h. bei gegebener Geschwindigkeit die Zeit, in der die Pressstempel mit dem zu verpressenden Pulver zusammenwirken. Die Pressstempelköpfe weisen außerdem eine Zylinderfläche auf, und zwischen dieser und der Spiegelfläche ist ein gerundeter Übergang angeordnet, wobei der Übergang einen relativ großen Radius aufweist, um beim Unterfahren der Druckrollen diese erst allmählich zur Wirkung kommen zu lassen. An der Unterseite gehen die Stempelköpfe in einem zumeist konischen Abschnitt in den Schaft über.Press punches of the type mentioned have a punch head and a shaft. The stamp head has at the top a mirror surface, which interact with pressure rollers in the rotary press. The diameter of the mirror surface determines the pressure holding time of the ram, ie at a given speed, the time in which the ram interact with the powder to be pressed. The press die heads also have a cylindrical surface, and between this and the mirror surface a rounded transition is arranged, wherein the transition has a relatively large radius to the underrun of the pressure rollers this only gradually to the effect to come. At the bottom of the punch heads go in a mostly conical section in the shaft.

Die Masse der Stempel einer Rundläuferpresse und die damit verbundene Trägheit ist ein begrenzender Faktor für die Maschinendrehzahl und zudem maßgeblich für den Verschleiß von Stempelköpfen und mit diesen zusammenwirkenden Kurven. Außerdem ergibt sich eine ungünstige Wechselwirkung zwischen Druckrolle und Stempelkopf durch ungleichmäßigen Übergang der Druckrolle von einem zum nächsten Stempelkopf. Dadurch wird eine erhebliche Geräuschemission und ein Verschleiß an Stempel und Druckrolle verursacht.The mass of the dies of a rotary press and the associated inertia is a limiting factor for the engine speed and also crucial for the wear of punch heads and with these cooperating curves. In addition, there is an unfavorable interaction between the pressure roller and the stamp head due to uneven transition of the pressure roller from one to the next stamp head. This causes a considerable noise emission and wear on punch and pressure roller.

Die geometrische Ausbildung und Abmessung von Stempelköpfen für Rundläuferpressen sind normiert (DIN ISO 18084:2006-09). Der Durchmesser des Kopfes, der durch die Zylinderfläche bestimmt ist, beträgt danach entweder 25,27 oder 31,6 mm, der Durchmesser der Spiegelfläche beträgt wahlweise 9,6 bzw. 16 mm, der Durchmesser des Schaftes beträgt 19 bzw. 25,35 mm und die Höhe des Kopfes beträgt 8,15 mm.The geometric design and dimensions of punch heads for rotary presses are normalized (DIN ISO 18084: 2006-09). The diameter of the head, which is determined by the cylindrical surface is then either 25.27 or 31.6 mm, the diameter of the mirror surface is optionally 9.6 or 16 mm, the diameter of the shaft is 19 or 25.35 mm and the height of the head is 8.15 mm.

Der Erfindung liegt die Aufgabe zugrunde, einen Stempel für eine Rundläuferpresse zu schaffen, bei dem eine kleinere Baugröße erzielt und damit ein geringerer Abstand der Stempel ermöglicht wird. Außerdem soll die Geräuschemission reduziert werden können.The invention has for its object to provide a stamp for a rotary press, which achieves a smaller size and thus a smaller distance of the stamp is possible. In addition, the noise emission should be able to be reduced.

Diese Aufgabe wird durch die Merkmale des Patentanspruch 1 gelöst.This object is solved by the features of claim 1.

Bei dem erfindungsgemäßen Stempel ist der Durchmesser des Kopfes kleiner als 25 mm, und der Übergangsbereich ist so gewählt, dass seine Höhe kleiner ist als die halbe Höhe der Zylinderfläche.In the stamp according to the invention the diameter of the head is smaller than 25 mm, and the transition region is chosen so that its height is smaller than half the height of the cylindrical surface.

Bei der Erfindung ist der Radius des Übergangsbereichs zwischen Spiegelfläche und Zylinderfläche relativ klein im Vergleich zum normierten Stempelkopf. Bei letzterem beträgt dieser Radius 16 mm. Nach einer Ausgestaltung der Erfindung ist der erste Radius kleiner als 14 mm, vorzugsweise im Bereich von 9 bis 11 mm.In the invention, the radius of the transition region between mirror surface and cylindrical surface is relatively small compared to the normalized stamp head. In the latter, this radius is 16 mm. According to one embodiment of the invention, the first radius is smaller than 14 mm, preferably in the range of 9 to 11 mm.

Bei dem normierten Stempelkopf ist zwischen dem gerundeten Übergang und der Zylinderfläche ein sehr kleiner Radius von 0,8 mm vorgesehen. Nach einer Ausgestaltung der Erfindung entspricht der zweite Radius mindestens einem Fünftel der Größe des ersten Radius, vorzugsweise einem Viertel des ersten Radius. Der zweite Radius ist nach einer anderen Ausgestaltung der Erfindung 2 bis 3 mm, vorzugsweise 2,5 mm.In the normalized stamp head, a very small radius of 0.8 mm is provided between the rounded transition and the cylindrical surface. According to one embodiment of the invention, the second radius corresponds to at least one fifth of the size of the first radius, preferably a quarter of the first radius. The second radius is according to another embodiment of the invention 2 to 3 mm, preferably 2.5 mm.

Nach einer weiteren Ausgestaltung der Erfindung entspricht die Höhe der Zylinderfläche mindestens der halben Höhe des Stempelkopfes. Nach einer weiteren Ausgestaltung der Erfindung beträgt das Verhältnis der Höhe der Zylinderfläche zur Gesamthöhe des Stempelkopfes etwas weniger als 0,5, z. B. 0,47 - 0,48. (Wenn vorstehend und nachstehend von der Höhe des Stempelkopfes die Rede ist, dann meint dies die gesamte Höhe des Kopfes von der Spiegelfläche bis zum Schaft).According to a further embodiment of the invention, the height of the cylindrical surface corresponds to at least half the height of the punch head. According to a further embodiment of the invention, the ratio of the height of the cylinder surface to the total height of the punch head is slightly less than 0.5, z. B. 0.47 - 0.48. (If the above and below of the height of the punch head is mentioned, then this means the entire height of the head from the mirror surface to the shaft).

Auch der Durchmesser des Schafts des erfindungsgemäßen Stempels ist relativ klein. Herkömmlich beträgt er, wie bereits erwähnt, wahlweise 19 oder 25,35 mm. Nach einer Ausgestaltung der Erfindung beträgt der Durchmesser des Schaftes < 19 mm. Vorzugsweise beträgt der Durchmesser weniger als 14 mm, vorzugsweise zwischen 11 und 13 mm.Also, the diameter of the shaft of the stamp according to the invention is relatively small. Conventionally, it is, as already mentioned, either 19 or 25.35 mm. According to one embodiment of the invention, the diameter of the shaft is <19 mm. Preferably, the diameter is less than 14 mm, preferably between 11 and 13 mm.

Nach einer anderen Ausgestaltung der Erfindung ist das Verhältnis Durchmesser Schaft zu Durchmesser Spiegelfläche kleiner als 1,7, vorzugsweise etwa 1,5.According to another embodiment of the invention, the ratio diameter shaft to diameter mirror surface is less than 1.7, preferably about 1.5.

Der erfindungsgemäße Stempel ist vorzugsweise auf segmentierte Matrizenscheiben anwendbar, die Formbohrungen ohne Formeinsätze (Matrizen) aufweisen. Nach einer Ausgestaltung der Erfindung hierzu ist vorgesehen, dass der Achsabstand der Stempel auf dem Teilkreis der Formbohrungen kleiner als 20 mm beträgt.The punch according to the invention is preferably applicable to segmented die plates having mold holes without mold inserts (dies). According to one embodiment of the invention for this purpose, it is provided that the center distance of the punches on the pitch circle of the form of holes is less than 20 mm.

Mit Hilfe der Erfindung ist die Anzahl der Stationen auf einem bestimmten Teilkreis signifikant vergrößerbar. Ferner wird die Masse der Stempel reduziert. Dies reduziert auch den Verschleiß an Stempelköpfen und Kurven. Der genaue Radienübergang des Stempelkopfes ermöglicht nicht nur die erhebliche Massenreduzierung, sondern auch einen gleichmäßigeren Übergang der Druckrolle von einem zum nächsten Stempelkopf. Dadurch wird die Geräuschemission verringert sowie auch der Verschleiß an Stempeln und Druckrollen.With the aid of the invention, the number of stations on a particular pitch circle is significantly increased. Furthermore, the mass of the stamp is reduced. This reduces also the wear on punch heads and curves. The exact radius transition of the punch head not only allows the significant mass reduction, but also a more uniform transition of the pressure roller from one to the next stamp head. This reduces the noise emission as well as the wear on punches and pressure rollers.

Ein Ausfuhrungsbeispiel der Erfindung wird nachfolgend näher erläutert.

Fig. 1
zeigt einige Oberstempel der Erfindung in Reihe angeordnet.
Fig. 2
zeigt vergrößert einen Stempelkopf der Stempel nach Fig. 1.
An exemplary embodiment of the invention will be explained in more detail below.
Fig. 1
shows some upper punch of the invention arranged in series.
Fig. 2
shows enlarged a stamp head of the stamp after Fig. 1 ,

In Fig. 1 sind einige Stempel 10 mit einem Schaft 12 und einem Stempelkopf 14 gezeigt. Sie sind, was nicht näher beschrieben und gezeigt ist, in einer Stempelführung eines Rotors einer Rundläuferpresse angeordnet. Derartige Rundläuferpressen sind allgemein bekannt, so dass hierauf Bezug genommen werden kann. Die Stempel 10 wirken mit Formbohrungen einer ebenfalls nicht gezeigten Matrizenplatte zusammen, die gemeinsam mit den Stempeln 10 um eine Hochachse gedreht wird. In Druckstationen wirkt mindestens eine Druckrolle mit den Stempelköpfen 14 zusammen, um die Stempelschäfte bzw. der Presseinsatz der Stempelschäfte in die Formbohrungen einzupressen, um darin aufgenommenes Pulver zu einem Pressling zu pressen. Auch dies ist nicht gezeigt und wird als bekannt vorausgesetzt.In Fig. 1 For example, some punches 10 are shown with a shaft 12 and a punch head 14. They are, what is not described and shown in detail, arranged in a punch guide of a rotor of a rotary press. Such rotary presses are well known, so that reference may be made thereto. The punches 10 cooperate with mold bores of a die plate, also not shown, which is rotated together with the punches 10 about a vertical axis. In printing stations, at least one pressure roller cooperates with the punch heads 14 to press the punch shanks or the press insert of the punch shafts into the die holes in order to press powder received therein into a compact. This too is not shown and is assumed to be known.

Wie aus Fig. 1 ferner erkennbar, haben die Stempelköpfe 14 einen sehr geringen Abstand voneinander. Der Achsabstand der Stempelschäfte 12 bzw. der Stempelköpfe 14 ist in Fig. 1 mit X bezeichnet.How out Fig. 1 Furthermore, recognizable, the punch heads 14 have a very small distance from each other. The center distance of the punch shafts 12 and the punch heads 14 is in Fig. 1 denoted by X.

Nachstehend soll ein Stempel nach Fig. 1 näher beschrieben werden. Stempelkopf 14 und Stempelschaft 12 sind mit Maßen versehen. Die Maße sind in Millimeter. Der Stempelkopf 14 weist eine obere Spiegelfläche 16 auf mit einem Durchmesser von 8 mm. Der Stempelkopf 14 weist ferner eine Zylinderfläche 20 auf mit einem Durchmesser von 19 mm. Zwischen Spiegelfläche 16 und der Zylinderfläche 20 ist ein erster Übergangsbereich 22 vorgesehen mit einem Radius von 10 mm. Ein weiterer Übergangsbereich 24 weist einen Radius von 2,5 mm auf. Zwischen der Zylinderfläche 20 und dem Schaft 12 ist ein konischer Übergangsbereich 28 gebildet mit einem Konuswinkel von 30°. Die Höhe der Zylinderfläche 20 beträgt 5,1 mm und die Höhe des Stempelkopfes 14 10,7 mm. Der Durchmesser des Schaftes beträgt 12 mm.Below is a stamp after Fig. 1 be described in more detail. Stamp head 14 and stamp shaft 12 are provided with dimensions. The dimensions are in millimeters. The stamp head 14 has an upper mirror surface 16 with a diameter of 8 mm. The stamp head 14 further has a cylindrical surface 20 with a diameter of 19 mm. Between mirror surface 16 and the cylindrical surface 20, a first transition region 22 is provided with a radius of 10 mm. Another transition region 24 has a radius of 2.5 mm. Between the cylindrical surface 20 and the shaft 12, a conical transition region 28 is formed with a cone angle of 30 °. The height of the cylindrical surface 20 is 5.1 mm and the height of the punch head 14 10.7 mm. The diameter of the shaft is 12 mm.

Die beiden Radien der Übergangsbereiche 22 und 24 sind relativ klein und ermöglichen eine kleine Baugröße für den Stempelkopf 14. Der Radienübergang der Übergangsbereiche 24, 22 ermöglicht einen optimalen Übergang der Druckrolle von einem Stempelkopf zum nächsten, so dass der Verschleiß und die Geräuschemission minimiert wird. Insgesamt ermöglicht der Stempelkopf nach den Figuren 1 und 2 eine kleine Baugröße und damit eine reduzierte Masse. Dabei bewegt sich der Durchmesser der Spiegelfläche 16 im Rahmen des Üblichen, um die Druckhaltezeit gleich zu halten. Auch die Höhe der Zylinderfläche 20 ist gegenüber herkömmlichen Abmessungen in etwa gleich. Deutlich reduziert ist die Höhe der beiden Übergangsbereiche 24, 22, wodurch sich die kleinere Baugröße des Kopfes ergibt. Auch der Durchmesser des Schaftes 12 ist gegenüber herkömmlichen Stempelschäften reduziert, so dass auch über diesen die Masse reduziert wird.The two radii of the transition regions 22 and 24 are relatively small and allow a small size for the punch head 14. The radius transition of the transition regions 24, 22 allows an optimum transition of the pressure roller from one stamp head to the next, so that the wear and the noise emission is minimized. Overall, the stamp head allows for the Figures 1 and 2 a small size and thus a reduced mass. In this case, the diameter of the mirror surface 16 moves within the scope of the usual, to keep the pressure holding time the same. The height of the cylindrical surface 20 is approximately equal to conventional dimensions. Significantly reduced is the height of the two transition regions 24, 22, resulting in the smaller size of the head. Also, the diameter of the shaft 12 is reduced compared to conventional Stempelschäften, so that over this mass is reduced.

Aufgrund der Bemessung des Stempels nach den Figuren 1 und 2 ist ein Achsabstand X möglich, der kleiner ist als 20 mm. Auf diese Weise kann eine sehr große Anzahl von Stempeln auf einem vorgegebenen Teilkreis angeordnet werden, wodurch die Produktionsmenge pro Zeiteinheit vergrößert wird.Due to the design of the stamp after the Figures 1 and 2 is an axial distance X possible, which is smaller than 20 mm. In this way, a very large number of punches can be arranged on a given pitch circle, whereby the production amount per unit time is increased.

Claims (12)

Stempel für eine Rundläuferpresse, der einen Schaft und einen Kopf aufweist, wobei der Kopf eine obere Spiegelfläche, eine Zylinderfläche und einen gerundeten Übergangsbereich zwischen Spiegelfläche und Zylinderfläche mit einem ersten und einem zweiten Radius aufweist, wobei der erste Radius größer als der zweite Radius ist und wobei der Stempelkopf ferner einen vorzugsweise konischen Übergangsbereich von der Zylinderfläche zum Schaft aufweist, dadurch gekennzeichnet, dass der Durchmesser des Kopfes (14) kleiner ist als 25 mm und der erste Radius des ersten Übergangsbereichs so gewählt ist, dass seine Höhe kleiner ist als die halbe Höhe der Zylinderfläche (20).A punch for a rotary press having a shank and a head, the head having an upper mirror surface, a cylindrical surface and a rounded transition region between mirror surface and cylindrical surface having a first and a second radius, wherein the first radius is greater than the second radius and the stamp head further having a preferably conical transition region from the cylindrical surface to the shank, characterized in that the diameter of the head (14) is less than 25 mm and the first radius of the first transition region is chosen so that its height is less than half Height of the cylindrical surface (20). Stempel nach Anspruch 1, dadurch gekennzeichnet, dass der erste Radius kleiner als 14 mm beträgt, vorzugsweise im Bereich von 9 bis 11 mm liegt.A stamp according to claim 1, characterized in that the first radius is smaller than 14 mm, preferably in the range of 9 to 11 mm. Stempel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der zweite Radius mindestens einem Fünftel der Größe des ersten Radius entspricht, vorzugsweise einem Viertel des ersten Radius.A stamp according to claim 1 or 2, characterized in that the second radius corresponds to at least one fifth of the size of the first radius, preferably a quarter of the first radius. Stempel nach Anspruch 3, dadurch gekennzeichnet, dass der zweite Radius etwa 2 bis 3 mm, vorzugsweise 2,5 mm beträgt.A stamp according to claim 3, characterized in that the second radius is about 2 to 3 mm, preferably 2.5 mm. Stempel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Höhe der Zylinderfläche (20) mindestens fast der halben Höhe des Stempelkopfes (14) entspricht.A stamp according to any one of claims 1 to 4, characterized in that the height of the cylindrical surface (20) corresponds to at least almost half the height of the punch head (14). Stempel nach Anspruch 5, dadurch gekennzeichnet, dass das Verhältnis der Höhe der Zylinderfläche (20) zur Gesamthöhe des Stempelkopfes (14) größer als 0,5 mm ist.A stamp according to claim 5, characterized in that the ratio of the height of the cylindrical surface (20) to the total height of the punch head (14) is greater than 0.5 mm. Stempel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der konische Übergangsbereich (28) zum Schaft (12) höchstens ein Viertel der Gesamthöhe des Kopfes (14) ist.Stamp according to one of claims 1 to 6, characterized in that the conical transition region (28) to the shaft (12) is at most a quarter of the total height of the head (14). Stempel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Durchmesser des Schaftes (12) kleiner als 19 mm beträgt.Stamp according to one of claims 1 to 7, characterized in that the diameter of the shank (12) is smaller than 19 mm. Stempel nach Anspruch 8, dadurch gekennzeichnet, dass der Durchmesser kleiner als 14 mm beträgt, vorzugsweise zwischen 11 und 13 mm liegt.A stamp according to claim 8, characterized in that the diameter is smaller than 14 mm, preferably between 11 and 13 mm. Stempel nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Verhältnis Durchmesser/Schaft (12) zu Durchmesser/Spiegelfläche (16) kleiner als 1,7 ist, vorzugsweise etwa 1,5.Stamp according to one of claims 1 to 9, characterized in that the ratio diameter / shaft (12) to diameter / mirror surface (16) is less than 1.7, preferably about 1.5. Stempel nach einem der Ansprüche 1 bis 10, gekennzeichnet durch seine Anwendung auf eine Matrizenscheibe, die aus einzelnen Segmenten zusammensetzt sind und Formbohrungen ohne Formeinsätze (Matrizen) aufweisen.A stamp according to any one of claims 1 to 10, characterized by its application to a die plate, which are composed of individual segments and have mold holes without mold inserts (dies). Stempel nach Anspruch 11, dadurch gekennzeichnet, dass der Achsabstand der Stempel (10) auf dem Teilkreis der Formbohrungen < 20 mm beträgt.A stamp according to claim 11, characterized in that the axial spacing of the punches (10) on the pitch circle of the form bores is <20 mm.
EP09004314.2A 2008-04-23 2009-03-26 Punch for a rotary press Active EP2111972B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008020748A DE102008020748B4 (en) 2008-04-23 2008-04-23 Stamp for a rotary press

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EP2111972A2 true EP2111972A2 (en) 2009-10-28
EP2111972A3 EP2111972A3 (en) 2011-10-05
EP2111972B1 EP2111972B1 (en) 2015-01-14

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US (1) US8137089B2 (en)
EP (1) EP2111972B1 (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269813A3 (en) * 2009-07-02 2015-01-21 Fette GmbH Press punch for a rotary press
US10343363B2 (en) 2016-07-26 2019-07-09 Fette Engineering GmbH Punch for a rotary press

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7778808B2 (en) * 2021-03-10 2025-12-02 ヘーエーアー プロセス エンジニアリング ナームロゼ フェンノートシャップ Tablet forming machine
DE202022107077U1 (en) 2022-12-19 2024-03-21 Romaco Kilian Gmbh Stamp for rotary tablet press

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Publication number Priority date Publication date Assignee Title
GB744799A (en) 1953-10-12 1956-02-15 Evans Medical Supplies Ltd Improvements relating to the production of coated tablets
DE1783564U (en) 1958-12-11 1959-02-19 Korsch Spezialfab Emil STAMP GUIDE ON ROTARY TABLETS - COMPRESSION MACHINES.
JPH066147B2 (en) * 1991-08-08 1994-01-26 株式会社菊水製作所 Punch of rotary powder molding machine
DE19502596C2 (en) 1995-01-28 1997-08-28 Fette Wilhelm Gmbh Measuring device and computer for checking the tablets of the current production made on a rotary press
US6106262A (en) * 1997-12-25 2000-08-22 Metropolitan Computing Corporation Press simulation apparatus
EP1386722A4 (en) * 2001-05-07 2005-10-19 Kikusui Seisakusyo Ltd Rotary type compression molding machine
CA2492869A1 (en) * 2002-07-19 2004-01-29 Smi Incorporated Method and apparatus for making miniature tablets
DK1782944T3 (en) * 2004-08-26 2014-09-01 Kikusui Seisakusho Ltd Rotary compression molding machine using a piston

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269813A3 (en) * 2009-07-02 2015-01-21 Fette GmbH Press punch for a rotary press
EP2269813B1 (en) 2009-07-02 2022-10-12 Fette GmbH Press punch for a rotary press
US10343363B2 (en) 2016-07-26 2019-07-09 Fette Engineering GmbH Punch for a rotary press

Also Published As

Publication number Publication date
EP2111972A3 (en) 2011-10-05
US20090269433A1 (en) 2009-10-29
DE102008020748B4 (en) 2010-12-30
DE102008020748A1 (en) 2009-10-29
EP2111972B1 (en) 2015-01-14
US8137089B2 (en) 2012-03-20

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