EP0448190A2 - Presse à table tournante - Google Patents

Presse à table tournante Download PDF

Info

Publication number
EP0448190A2
EP0448190A2 EP91250075A EP91250075A EP0448190A2 EP 0448190 A2 EP0448190 A2 EP 0448190A2 EP 91250075 A EP91250075 A EP 91250075A EP 91250075 A EP91250075 A EP 91250075A EP 0448190 A2 EP0448190 A2 EP 0448190A2
Authority
EP
European Patent Office
Prior art keywords
rotor
rotary press
lower punches
fixed
punches
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
EP91250075A
Other languages
German (de)
English (en)
Other versions
EP0448190B1 (fr
EP0448190A3 (en
Inventor
Wolfgang Dipl.-Ing. Korsch
Michael Dipl.-Ing. Schmett
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.)
Korsch AG
Original Assignee
Korsch Maschinenfabrik
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
Application filed by Korsch Maschinenfabrik filed Critical Korsch Maschinenfabrik
Publication of EP0448190A2 publication Critical patent/EP0448190A2/fr
Publication of EP0448190A3 publication Critical patent/EP0448190A3/de
Application granted granted Critical
Publication of EP0448190B1 publication Critical patent/EP0448190B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • 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 rotary press for pressing cylindrical shaped bodies, in particular tablets, from a rotor with a die table, with an upper part and with a lower part, the upper part and the lower part leading the upper and lower punches engaging in the matrices of the die table , from the upper and lower punches associated with rotating teeth and from interacting with these fixed teeth.
  • a rotary press of the generic type is previously known from DE-GM 88 16 064.
  • the upper and lower stamps immediately after passing through them acting pressure rollers rotatable about their longitudinal axes.
  • the upper and lower punches are rotated about their longitudinal axes either by a friction connection of the upper and lower punches with pressure rollers arranged directly behind the upper and lower punches, which can be pressed under spring force against the upper and lower punches, or by the interaction of a toothing arranged on the punch shaft with a stationary rack.
  • the rotational movement of the upper and lower punches directly after the pressing process and while pulling the upper and lower punches out of the die of the die table is intended to achieve a separation of the surface of the pressed tablet at least from the upper punch.
  • a rotary movement of the lower punch should also avoid the adhesion between the latter and the underside of the tablet.
  • a disadvantage of the frictional connection between the upper and lower punches and the associated guide curve sections is, however, that wear occurs on the one hand, and on the other hand no defined rotation of the upper and lower punches is carried out. If the upper and lower punches are rotated to different extents, the pressed molded body can even be destroyed.
  • a disadvantage of the toothing arranged on the punch shaft is, on the one hand, that specially designed upper and lower punches must be used and, on the other hand, that there is friction between the toothing of the upper and lower punches and the associated, stationary toothed racks, since the toothing of the upper and lower punches together with these the upper and lower punches are moved in the axial direction.
  • the cams running against the cam rollers lead to rattling noises and that the cams assigned to the individual upper and lower punches do not allow a change in the angle of rotation of the upper and lower punches, unless the individual cams of each upper and lower punch would be exchanged for differently shaped cams.
  • the upper and lower punches are axially movable but rotatably guided in sleeves to which the squats are attached.
  • the invention has for its object to provide a rotary press of the generic type, in which there is an exact engagement of the toothing of the upper and lower punches in the locally fixed toothing and in which there is no friction between the teeth when moving the upper and lower punches in the axial direction occurs.
  • the invention provides that the upper and lower punches slidably and non-rotatably within rotatable bushings inserted into the upper and lower part, respectively, which have rotating teeth are stored.
  • standardized upper and lower punches can be used, which are slidably mounted in the bushes but rotatably mounted, for example, by tongue and groove connections.
  • the bushings themselves are rotatably inserted in the upper and lower parts of the rotor and are provided with the toothings which rotate together with the bushes and interact with the fixed toothings. In this way, an exact engagement of the rotating toothing of the bushes guiding the punch with the fixed toothing is ensured, and any wear during an axial movement of the upper and lower punch is avoided.
  • the fixed teeth for the upper punches are arranged on the inside and the fixed teeth of the lower punches on the outside of the upper and lower parts of the rotor carrying the rotatable bushings. This results in an exact synchronization of the upper and lower punches in a desired direction of rotation.
  • the fixed toothings in the case of large-diameter rotors or large-diameter die tables are formed from tooth segments which are arranged with their partial circles for the toothing of the upper punches on the inside of the rotor and for the toothing of the lower punches on the outside of the rotor .
  • the rotating teeth of the rotatable bushings that guide the upper and lower punches are provided with indexable locking devices.
  • the bushings having the toothings are locked in a precisely fixed manner after leaving the toothings of the tooth segments, so that the engagement of the rotating toothings of the bushes takes place exactly in the associated tooth segments, so that there is no clamping between the two sides Gears can come.
  • the fixed toothings are formed from gearwheels with external or internal toothing.
  • the stamps are rotated continuously, the stamps also being rotated under the pressure rollers during the pressing process.
  • the toothed segments are arranged in the area of the pressure rollers, so that the rotary movement of the upper and lower punches takes place only in the area immediately before, during and immediately after the pressing process.
  • the rotary press for pressing cylindrical shaped bodies provides a rotating, vertical axis 1 for a rotor 2 which is arranged on it in a rotationally fixed manner and which consists of a disk-shaped die table 3 with the matrices 4 arranged on a radius and formed from an upper part 5 and an upper part 6, which carry rotatable bushings 7, 8 assigned to the matrices 4, in which the upper and lower punches 32, 33 movable up and down are guided .
  • These are moved up and down by control curves and, under the action of pressure rollers 17, compress the powdery material filled into the dies 4 into shaped bodies, in particular tablets. Filling shoes for the powdery material and scrapers for the finished molded articles are provided.
  • the sleeves 7 rotatably mounted in the upper part 5 of the rotor 2 have a longitudinal groove 9 for engaging a key, not shown in more detail, which is embedded in the upper punch 32.
  • a commercially available upper punch 32 can be used, which can be slid within the inner bore 18 of the bushing 7 with corresponding play, but is non-rotatably connected to the bushing 7 by the engagement of the feather key in the groove 9.
  • the bushing 7 has an external toothing 10 on the outside of its upper region, which is formed in one piece with the bushing 7.
  • the bushing 7 is inserted in an axially parallel bore 11 of the upper part 5, which is formed according to its outer diameter, so that it can rotate freely.
  • a sealing ring 12 is used, which seals the gap between the bushing 7 and the bore 11.
  • a cam bell 13 is arranged, which is non-rotatably attached to the frame of the rotary press, not shown.
  • the cam bell 13 carries the upper punch cam 14 on the outside on the one hand and an inner gearwheel segment on the other 15 with an external toothing 16, with which the outer toothing 10 of the bush 7 comes into engagement, as shown in FIG. 2.
  • the inner gear segment 15 is located in the area of the pressure roller 17 for the upper punch 32, as shown in FIG. 2, so that the upper punch 32 is rotated in the area in front of, below and behind the pressure roller 17 via the bushing 7 that guides it.
  • the rotation of the upper punch 32 is determined by the number of teeth of the outer toothing 10 of the bushing 7 and the number of teeth of the outer toothing 16 of the inner gear segment 15. The respective number of teeth allows the upper punch 18 to be rotated by 36 °, 72 ° or 360 ° or other angles.
  • an indexable locking device 19 is provided in the upper part 5 of the rotor 2, which consists of a radial bore 20 in Upper part 5, a ball 21 guided in this, a spherical cap 22 attached to the outside of the bushing 7, a spring 23 arranged in the radial bore 20 and a pressure piece 24 closing off the radial bore 20 to the outside.
  • a plurality of spherical caps 22 for partial rotations of, for example, 36 ° or 72 ° can also be attached.
  • the ball 21 engages in a spherical cap 22 as soon as the toothings 10, 16 have disengaged, so that the toothings 10 and 16 can be re-engaged smoothly without any clamping.
  • the bushings 8 in the lower part 6 of the rotor 2 are designed similarly to the bushings 7 in the upper part 5, the external toothing 10 being attached to the underside of the bushings 8. Furthermore, an outer toothed segment 25 with an inner toothing 26 is firmly attached to the frame of the rotary press, which is not shown in detail, the toothing 10 of the sleeve 8 of the lower part 6 of the rotor 2 engaging in the inner toothing 26 of the outer toothed segment 25. In the same way as for the sockets 7 of the upper part 5, a locking device 19 is provided for the sockets 8 of the lower part 6.
  • Both latching devices 19 in the upper part 5 and in the lower part 6 are assigned proximity switches 27, which monitor the exact latching of the balls 21 into the spherical caps 22. If a bushing 7, 8 should come to a standstill without the ball 21 latching into a spherical cap 22, the rotary press is switched off under the action of a proximity switch 27.
  • the proximity switches 27 of the latching devices 19 monitor the position of a latching bolt 28 within the radial bore 20, the position of the latching bolt 28 being dependent on the latching of the ball 21 in the spherical cap 22.
  • the rotor 2 ' is rotatably mounted on an axis 1' via ball bearings 29.
  • the dies 4 ' are inserted in the die table 3'.
  • the rotatable bushings 7 ' are located in the upper part 5'.
  • the rotatable bushings 8 ' are located in the lower part 6'.
  • the bushings 7 ', 8' are used in the same way as in the first embodiment with grooves 9 'for the rotationally fixed axial guidance of the upper and lower punches 32, 33.
  • the bushings 7', 8 ' are laterally the outer diameter of the associated bushing bores 11 ' in the Upper part 5 'or the lower part 6 'screwed in threaded screws 30 and axially slid onto slices 31. Furthermore, sealing rings 12 'are embedded at the lower end of the bores 11' for the bushings 7 'in the upper part 5'.
  • the second embodiment of the rotary press shown in FIGS. 3 and 4 has a smaller diameter of the disk-shaped die table 3 'and thus also of the disk-shaped upper and lower parts 5' or 5 '. 6 'Thus, in this embodiment the upper and lower punches 32, 33 can rotate continuously.
  • a gear 35 with external teeth 16 ' is provided in a rotationally fixed manner around the fixed axis 1', in which the external teeth 10 'of the bushings 7' of the upper part 5 'constantly engage.
  • a gear 36 provided with an internal toothing 26 ' is provided in a rotationally fixed manner with the frame 34 of the rotary press, with which the external toothing 10' of the bushings 8 'of the lower part 6' are constantly in engagement.
  • the bushings 7 ', 8' of the upper part 5 'and lower part 6' of the rotor 2 ' are constantly rotating, so that the upper and lower punches used in the bushings 7', 8 'are also subject to constant rotation.
  • the rotary movement of the rotor 2 ' takes place by means of a worm wheel 37 which meshes with a worm (not shown in more detail) and which is arranged in the housing 34 of the rotary press.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Switches With Compound Operations (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP91250075A 1990-03-17 1991-03-15 Presse à table tournante Expired - Lifetime EP0448190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9003241U 1990-03-17
DE9003241U DE9003241U1 (de) 1990-03-17 1990-03-17 Rundlaufpresse

Publications (3)

Publication Number Publication Date
EP0448190A2 true EP0448190A2 (fr) 1991-09-25
EP0448190A3 EP0448190A3 (en) 1992-04-08
EP0448190B1 EP0448190B1 (fr) 1994-11-23

Family

ID=6852154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250075A Expired - Lifetime EP0448190B1 (fr) 1990-03-17 1991-03-15 Presse à table tournante

Country Status (5)

Country Link
US (1) US5116214A (fr)
EP (1) EP0448190B1 (fr)
AT (1) ATE114274T1 (fr)
DE (2) DE9003241U1 (fr)
ES (1) ES2067851T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032386A1 (fr) * 1998-12-01 2000-06-08 Henkel Kommanditgesellschaft Auf Aktien Machine a pastiller
EP1080873A1 (fr) * 1999-08-27 2001-03-07 Wilhelm Fette GmbH Presse à table rotative
US6749416B2 (en) 2000-05-11 2004-06-15 Wilhelm Fette Gmbh Die for a rotary compression press
EP1666237A3 (fr) * 2004-10-20 2006-10-18 Fette GmbH Presse rotative
US8337741B2 (en) 2005-05-12 2012-12-25 Fette Gmbh Method for operating a rotary press and concentrically running press

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025484C1 (fr) * 1990-08-08 1991-10-10 Korsch Maschfab
JPH09511183A (ja) * 1994-01-15 1997-11-11 コルシュ プレッセン ゲーエムベーハ 型台合わせの型を固定する装置
US6068465A (en) * 1995-05-18 2000-05-30 Bwi Plc Rotary tabletting press
US5866177A (en) * 1997-05-16 1999-02-02 Owens-Illinois Closure Inc. Apparatus for compression molding plastic articles
US6106262A (en) 1997-12-25 2000-08-22 Metropolitan Computing Corporation Press simulation apparatus
ES2248065T3 (es) * 1999-03-18 2006-03-16 Korsch Ag Prensa con bancada rotativa dotada de punzones intercambiables.
DE10064640C2 (de) * 2000-12-22 2003-01-09 Henkel Kgaa Tablettenpreßstempel-Anordnung
US6830442B2 (en) * 2001-08-09 2004-12-14 William Alvin Cecil Rotary tablet press
DE102005030312B4 (de) * 2005-06-23 2011-05-05 Korsch Ag Rundläufer-Tablettiermaschine und Verfahren zur Herstellung einer Mehrschichttablette
DE102008006045B4 (de) * 2008-01-25 2010-06-24 Fette Gmbh Tablettenpresse
DE102008009364B4 (de) * 2008-02-14 2014-08-07 Bosch Packaging Technology Ltd. Tablettenpressmaschine mit neuartiger Rotoreinheit
EP2951096A4 (fr) * 2013-01-30 2016-11-02 Joseph Co Int Inc Appareil de compactage et procédé pour une unité d'échange thermique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL78838C (fr) * 1900-01-01
GB155594A (en) * 1919-06-11 1922-03-20 Emmanuel Gaillard Improvements in and relating to presses for making pastilles and other similar products
CH103284A (fr) * 1923-02-20 1924-02-01 A Th Dr Gaillard Presse à pastilles.
CH314483A (de) * 1952-07-16 1956-06-15 Lodewijk Koster Johan Presse zum Herstellen von Tabletten
US3337915A (en) * 1964-11-23 1967-08-29 Pennsalt Chemicals Corp Tablet press
DE8816064U1 (de) * 1988-06-14 1989-02-23 Henkel KGaA, 4000 Düsseldorf Rundläuferpresse zum Verpressen von zylindrischen Tabletten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068619A (en) * 1935-09-13 1937-01-19 Stokes Machine Co Tablet-making machine
US3118183A (en) * 1961-05-05 1964-01-21 Procter & Gamble Rotary tablet press having means to rotate the plungers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL78838C (fr) * 1900-01-01
GB155594A (en) * 1919-06-11 1922-03-20 Emmanuel Gaillard Improvements in and relating to presses for making pastilles and other similar products
CH103284A (fr) * 1923-02-20 1924-02-01 A Th Dr Gaillard Presse à pastilles.
CH314483A (de) * 1952-07-16 1956-06-15 Lodewijk Koster Johan Presse zum Herstellen von Tabletten
US3337915A (en) * 1964-11-23 1967-08-29 Pennsalt Chemicals Corp Tablet press
DE8816064U1 (de) * 1988-06-14 1989-02-23 Henkel KGaA, 4000 Düsseldorf Rundläuferpresse zum Verpressen von zylindrischen Tabletten

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000032386A1 (fr) * 1998-12-01 2000-06-08 Henkel Kommanditgesellschaft Auf Aktien Machine a pastiller
EP1080873A1 (fr) * 1999-08-27 2001-03-07 Wilhelm Fette GmbH Presse à table rotative
US6595767B1 (en) 1999-08-27 2003-07-22 Wilhelm Fette Gmbh Rotary compression press
US6749416B2 (en) 2000-05-11 2004-06-15 Wilhelm Fette Gmbh Die for a rotary compression press
EP1666237A3 (fr) * 2004-10-20 2006-10-18 Fette GmbH Presse rotative
US7654814B2 (en) 2004-10-20 2010-02-02 Fette Gmbh Rotary press
US8337741B2 (en) 2005-05-12 2012-12-25 Fette Gmbh Method for operating a rotary press and concentrically running press

Also Published As

Publication number Publication date
US5116214A (en) 1992-05-26
DE9003241U1 (de) 1990-06-13
ATE114274T1 (de) 1994-12-15
EP0448190B1 (fr) 1994-11-23
EP0448190A3 (en) 1992-04-08
DE59103559D1 (de) 1995-01-05
ES2067851T3 (es) 1995-04-01

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