EP2269813A2 - Poinçon de presse pour une presse rotative - Google Patents

Poinçon de presse pour une presse rotative Download PDF

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Publication number
EP2269813A2
EP2269813A2 EP10006112A EP10006112A EP2269813A2 EP 2269813 A2 EP2269813 A2 EP 2269813A2 EP 10006112 A EP10006112 A EP 10006112A EP 10006112 A EP10006112 A EP 10006112A EP 2269813 A2 EP2269813 A2 EP 2269813A2
Authority
EP
European Patent Office
Prior art keywords
punch
press
transition region
mirror surface
cylindrical surface
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
EP10006112A
Other languages
German (de)
English (en)
Other versions
EP2269813A3 (fr
EP2269813B1 (fr
Inventor
Friedrich Meissner
Stefan Lüdemann
Jan Naeve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fette Compacting GmbH
Original Assignee
Fette GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Fette GmbH filed Critical Fette GmbH
Publication of EP2269813A2 publication Critical patent/EP2269813A2/fr
Publication of EP2269813A3 publication Critical patent/EP2269813A3/fr
Application granted granted Critical
Publication of EP2269813B1 publication Critical patent/EP2269813B1/fr
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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
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams

Definitions

  • the invention relates to a press die for a rotary press, comprising a shank, a punch head arranged at one shank end and a press region arranged at the other shank end, wherein the punch head has an upper mirror surface, an outer cylindrical surface and a curved transition region between the mirror surface and the cylindrical surface.
  • Rotary presses for the production of tablets and similar compacts have lower and upper punches, which cooperate with die holes in a die plate to process filled powder into compacts.
  • the molds with which the punches interact are referred to as dies, which are secured as separate sleeve-like inserts in holes in the die plate.
  • press punches which have a shaft, at one end of a stamp head and at the other end a pressing region is arranged, which cooperates with the die holes to press the powder.
  • the stamp head has at its top a usually flat mirror surface, which cooperates with pressure rollers of 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 punch heads also have a cylindrical surface and a generally rounded transition region between the cylindrical surface and the mirror surface.
  • Known punch heads are constructed with geometrically defined radii and straight lines. On its underside, the punch heads pass into the shaft in a conical section, for example.
  • the geometrical design and dimensions of punch heads for rotary presses are standardized by DIN ISO 18084: 2006-09.
  • the invention is therefore an object of the invention to provide a press ram of the type mentioned, in which the noise emissions during operation further reduced and wear of the punch heads and the pressure rollers is further reduced.
  • the invention solves the problem in that the mirror surface and the transition region form a three-dimensional surface whose course is described in at least one radial direction by a mathematical function whose second derivative is continuous.
  • the mirror surface can be flat and circular in plan view. Together with the transition region, it forms a curved surface of the stamp head, with the transition region opening directly into the mirror surface.
  • the height of the stamp head decreases steadily from the mirror surface to the cylinder surface in particular.
  • the noise emissions occurring in the prior art and the wear caused by an unfavorable, especially non-uniform interaction between the pressure rollers and the punch heads The reason for this is that the transition region itself and in particular its mouth in the mirror surface has abrupt changes in radius. The transition from the outer radii of the transition region in the mirror surface is therefore uneven. This results in a likewise uneven contact with the pressure rollers and thus high noise emissions and wear.
  • the course of the upper side of the stamp head in at least one radial direction is described by a mathematical function which is continuous in the second derivative.
  • the at least one radial direction may in particular be the direction in which the pressure rollers engage the punch heads.
  • the pressure rollers therefore roll evenly on the punch heads.
  • the contact and thus the introduction of force are equalized by acting on the punch heads pressure rollers and reduces the wear on the punch head and the pressure rollers.
  • less vibrations of the machine frame occur, so that noise emissions are reduced.
  • the mathematical function can be, for example, a polynomial function which can assume a constant value in the area of the mirror surface.
  • the diameter of the head can be larger than 25 mm. However, smaller punch head diameters are possible.
  • the rotary press may in particular be a tablet press. In order to further uniform the interaction of the stamp head with the pressure rollers, the course of the three-dimensional surface in any radial direction can be described by the mathematical function continuous in second derivative.
  • the stamp head may also be rotationally symmetric. This allows an installation of the press ram into the rotary press in any rotational orientation.
  • the radius of curvature of the three-dimensional surface in the radial direction from the mirror surface to the cylindrical surface can steadily decrease.
  • the radius therefore decreases starting from the center of the mirror surface in the radial direction.
  • the radius is infinite with plane mirror surface.
  • a region rounded off with at least one predetermined radius can be provided between the transition region and the cylindrical surface.
  • at least one edge may also be provided between the transition region and the cylindrical surface.
  • the transition from the transition region to the Cylinder surface thus not continuous in second derivative.
  • the three-dimensional surface described by the mathematical function continuous in the second derivative can also include the cylindrical surface. In this case, the transition region thus opens directly into both the mirror surface and the cylindrical surface.
  • the stamp head may preferably be convex, in particular spherical, from the cylindrical surface into the shank.
  • a spherical design of the punch head base reduces the wear in the phase in which the punch is pulled out of the respective die bore.
  • the contact surface to the respective control cams is increased by the spherical shape.
  • the invention also relates to a rotary press with a rotor having an upper and a lower punch guide, in each of which a plurality of press dies are guided, which cooperate with holes arranged between the upper and lower punch guide die plate, wherein the punch in guide holes of Stamp guides are axially movable and their punch heads cooperate for pressing powdered material in the die holes with pressure rollers of the rotary press.
  • a section of a press ram 10 according to the invention is shown in its side view. Of the ram 10, the upper end of the shaft 12 is shown with the punch head 14. At the opposite end of the shaft 12, not shown, a known pressing area is provided which cooperates with the installation of the press ram 10 in a rotary tablet press with suitable die holes for pressing powdered tablet material.
  • the stamp head 14 is rotationally symmetrical, wherein the axis of rotational symmetry at the reference numeral 15 is shown in dashed lines. It also has an outer cylindrical surface 18. Between the cylindrical surface 18 and the mirror surface 16 there is a curved transition region 20.
  • the mirror surface 16 and the transition region 20 form a three-dimensional curved surface whose course is described in any radial direction of the punch head 14 by a mathematical function continuous in second derivative.
  • the radius of curvature of the three-dimensional surface steadily decreases from the center of the mirror surface 16 in the radial outward direction.
  • the height of the punch head 14 also decreases starting from the Spiegelf kaue 16 to the cylindrical surface 18 steadily.
  • a region 22 rounded off with a predetermined radius is provided.
  • a convex transitional region 24 is provided, which merges into the cylinder surface 18 via a first rounded region 26 and merges into the shaft via a second rounded region 28 ,
  • the function 30 may then be defined as constant, such that it maps the planar mirror surface. It should be noted that in Fig. 2 the origin of the coordinates has been placed on the lower edge of the three-dimensional surface formed by the transition region 20 and the mirror surface 16. The y-axis thus represents the height of the punch head 14. Die in Fig. 2 As shown, function 30, when rotated about a suitable axis, biases the three-dimensional surface formed by transition region 20 and mirror surface 16. In the diagram in Fig. 2 Also shown in phantom at 32 is the first derivative f '(x) of the function f (x). Finally, at reference numeral 34 in FIG Fig. 2 The second derivative f '(x) of the function f (x) is shown in dashed lines. It can be seen that the second derivative f '(x) of the function f (x) is continuous.
  • Fig. 1 shown pressing die reduced when operating in a rotary tablet press both occurring during contact with the pressure rollers noise emissions and the wear of the punch head and the pressure rollers.
  • the very flat transition of the transition area leads 20 in the mirror surface 16 to an increased pressure holding time of the stamp, so that even difficult to be pressed materials are easily processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Powder Metallurgy (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP10006112.6A 2009-07-02 2010-06-12 Poinçon de presse pour une presse rotative Active EP2269813B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009031367A DE102009031367B3 (de) 2009-07-02 2009-07-02 Pressstempel für eine Rundläuferpresse

Publications (3)

Publication Number Publication Date
EP2269813A2 true EP2269813A2 (fr) 2011-01-05
EP2269813A3 EP2269813A3 (fr) 2015-01-21
EP2269813B1 EP2269813B1 (fr) 2022-10-12

Family

ID=42371923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10006112.6A Active EP2269813B1 (fr) 2009-07-02 2010-06-12 Poinçon de presse pour une presse rotative

Country Status (4)

Country Link
US (1) US9821525B2 (fr)
EP (1) EP2269813B1 (fr)
DE (1) DE102009031367B3 (fr)
PL (1) PL2269813T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012575A1 (de) * 2012-06-13 2013-12-19 Jürgen Pagel Zahndruckrolle und Profildruckrolle für eine Rundläuferpresse
EP3275639A1 (fr) * 2016-07-26 2018-01-31 Fette Compacting GmbH Tampon pour une presse rotative

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007043582B3 (de) 2007-09-13 2008-11-27 Fette Gmbh Rotor für eine Rundlauf-Tablettenpresse

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8111860U1 (de) 1981-04-18 1981-09-24 Mense, Brunfrid, 4630 Bochum "stempel fuer eine tablettenpresse"
JPH066147B2 (ja) 1991-08-08 1994-01-26 株式会社菊水製作所 回転式粉末成形機の杵
DE19502596C2 (de) 1995-01-28 1997-08-28 Fette Wilhelm Gmbh Meßgerät und Rechner zur Überprüfung der auf einer Rundläuferpresse hergestellten Tabletten der laufenden Produktion
DE19646536C1 (de) * 1996-10-30 1998-01-29 Korsch Pressen Gmbh Verfahren zur Herstellung von Kopfflächen von mit zylindrischen Druckrollen zusammenwirkenden Stempeln für Rundlaufpressen und nach diesem Verfahren hergestellte Stempel
JP2003106111A (ja) * 2001-10-01 2003-04-09 Nsk Ltd タペットローラ
US20070087073A1 (en) 2005-08-23 2007-04-19 Chowdhury Tahseen A Tabletting press
DE102008020748B4 (de) * 2008-04-23 2010-12-30 Fette Gmbh Stempel für eine Rundläuferpresse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007043582B3 (de) 2007-09-13 2008-11-27 Fette Gmbh Rotor für eine Rundlauf-Tablettenpresse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012575A1 (de) * 2012-06-13 2013-12-19 Jürgen Pagel Zahndruckrolle und Profildruckrolle für eine Rundläuferpresse
DE102012012575B4 (de) * 2012-06-13 2014-09-25 Jürgen Pagel Zahndruckrolle und Profildruckrolle für eine Rundläuferpresse sowie Rundläuferpresse
EP3275639A1 (fr) * 2016-07-26 2018-01-31 Fette Compacting GmbH Tampon pour une presse rotative
DE102016113724A1 (de) * 2016-07-26 2018-02-01 Fette Compacting Gmbh Stempel für eine Rundläuferpresse
DE102016113724B4 (de) 2016-07-26 2019-01-17 Fette Compacting Gmbh Stempel für eine Rundläuferpresse
US10343363B2 (en) 2016-07-26 2019-07-09 Fette Engineering GmbH Punch for a rotary press

Also Published As

Publication number Publication date
DE102009031367B3 (de) 2010-09-02
EP2269813A3 (fr) 2015-01-21
US20110000272A1 (en) 2011-01-06
EP2269813B1 (fr) 2022-10-12
US9821525B2 (en) 2017-11-21
PL2269813T3 (pl) 2023-05-08

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