EP0470679B1 - Presse zur Herstellung ummantelter Kerntabletten - Google Patents

Presse zur Herstellung ummantelter Kerntabletten Download PDF

Info

Publication number
EP0470679B1
EP0470679B1 EP91250217A EP91250217A EP0470679B1 EP 0470679 B1 EP0470679 B1 EP 0470679B1 EP 91250217 A EP91250217 A EP 91250217A EP 91250217 A EP91250217 A EP 91250217A EP 0470679 B1 EP0470679 B1 EP 0470679B1
Authority
EP
European Patent Office
Prior art keywords
press
core
radial arms
receiving
rotor
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
Application number
EP91250217A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0470679A3 (en
EP0470679A2 (de
Inventor
Wolfgang Korsch
Michael 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 EP0470679A2 publication Critical patent/EP0470679A2/de
Publication of EP0470679A3 publication Critical patent/EP0470679A3/de
Application granted granted Critical
Publication of EP0470679B1 publication Critical patent/EP0470679B1/de
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
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/34—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses for coating articles, e.g. tablets

Definitions

  • the invention relates to a press for producing coated core tablets according to the preamble of claim 1.
  • a press of the generic type is previously known from EP O.349.777 A1.
  • the radial arms are mounted so that they can be radially retracted and extended on a transfer device next to the press.
  • the transfer device is assigned an annular disk rotating with the radial arms, which is arranged below the radial arms and is provided with receiving nests for one core each, which are assigned to the transfer heads.
  • the transfer device is driven in rotation about an axis parallel to the die table axis.
  • the partial circles of the transfer heads and the partial circles of the matrices overlap by the distance between two matrices, the transfer heads are guided in the overlap area of the partial circles on the partial circle of the die table.
  • the rotor of the press carries a guide ring with semicircular recesses in which the transfer heads of the transfer device are guided in order to cause the partial circles of the die table and the transfer heads to overlap.
  • the invention is therefore based on the object to improve a press of the generic type in such a way that with the smallest possible construction volume of the press a synchronization of the transfer heads and the dies is ensured during the transfer of the cores in a simple manner and without friction and the resulting noise.
  • the invention provides that the radial arms are mounted in the rotor and the receiving nests are arranged on the die table. According to the invention, the radial arms are thus mounted in the rotor itself, so that a separate transfer device is no longer required.
  • the overall volume of the press is therefore that of the rotor required construction volume limited.
  • the receiving nests for the cores are arranged on the die table itself, only a simple movement of the radial arms over the die table is necessary in order to transfer the cores from the receiving nests into the dies.
  • the receiving nests are arranged on a pitch circle of the die table, which is larger than the pitch circle of the dies itself, so that the radial arms in the rotor are retractable and extendable, so that from the pitch circle of the dies into the pitch circle of the receiving nests and to be moved back.
  • the transfer heads are moved back to a pitch circle that is smaller than the pitch circle of the matrices.
  • the press for the production of coated core tablets consists of a rotor 1, which is fixed to a rotating drive shaft 2 and is formed from an upper part 3, a lower part 4 and a die table 5 fastened in between, and a fixed cam bell 6 with cam plate 7, vacuum plate 8 and upper ram curve 9. Inside the curve-fixed bell 6, the drive shaft 2 is mounted by means of bearings, not shown in detail.
  • the rotor 1 comprises a circular support plate 10 placed on the drive shaft 2, on which the annular lower part 4 for guiding the lower punches 11 is firmly attached.
  • the heads 12 of the lower punches 11 are guided in curves, not shown in more detail, in order to bring about a vertical up and down movement of the punches 11.
  • the circular disk-shaped die table 5 is placed on the lower part 4. On the one hand, this includes a pitch circle 13 for the dies 14, a pitch circle 15 with a larger diameter for the receiving nests 16 of the cores 17 and a radial clearance 18 with a diameter smaller than the pitch circle 13 for the dies 14 for a purpose described in more detail later.
  • the upper part 3 Fastened to the rotor 1, which serves to guide the upper punches 19 which are mounted in guide bushes 20 within the upper part 3.
  • the heads 21 of the upper stamp 19 are guided in the upper stamp curve 9, which is attached to the curve bell 6 fixed to the frame.
  • the support plate 10 welded to the drive shaft 2 is firmly connected to a welded support cylinder 22 which is arranged concentrically to the axis of the drive shaft 2 and which forms an internal support for the upper part 3 and the lower part 4 of the rotor 1.
  • the cam plate 7 is fixed on the cam bell 6 by means of threaded screws 23.
  • the base body 24, which forms the cam plate 7 at its lower end, is arranged concentrically with the drive shaft 2.
  • the shape of the cam disc 7 results from the cross section according to FIG. 5.
  • Radial arms 25 are actuated by the cam disc 7, which are designed as pistons 26 provided with a polygon profile, which are located within bushes 27 which have a polygon profile and are radially inserted into the upper part 3 are mounted radially to the axis of the drive shaft 2.
  • the support cylinder 22 of the rotor 1 has radial through openings 28.
  • support rollers 29 are mounted in the receiving slots via roller bearings 30, in particular nail bearings, which can be rotated on a bearing pin 31 arranged transversely to the longitudinal axis of the pistons 26.
  • a limiting disk 32 is mounted for a compression spring 33, which is supported on the radially inward end face of the polygon bushes 27 and causes a constant contact pressure for the support roller 29 on the outer curve of the cam disk 7.
  • the press shown in the figures carries on the table 5 twenty-four dies 14 with associated lower and upper punches 11, 19 and with associated radial arms 25 in the form of the pistons 26.
  • Each piston 26 carries on its radially outer, free end a transfer head 34, which is shown in Fig. 4 together with a receiving nest 16 underneath and the associated die 14 in an enlarged view.
  • Each transfer head 34 comprises a head piece 35 which is provided with a bore 36 for receiving the piston 26.
  • the head piece 35 is fixed on the piston 26 in a rotationally fixed and immovable manner.
  • a core punch 38 extends transversely to the longitudinal axis 37 of the piston 26 and parallel to the axis 2 ′ of the drive shaft 2, which serves to receive and transfer cores 17.
  • the core punch 38 penetrates a lower bore 39 of the head piece 35 with a sliding guide and is further guided by a collar 41 sliding in an inner bore 40 in the upper region of the head piece 35.
  • an annular disk 42 is fastened at the upper end by means of a snap ring 43.
  • a compression spring 44 extends, which causes a permanent stop of the collar 41 of the core punch 38 on the annular disc 42.
  • a longitudinal bore 45 is made within the core punch 38, which ends approximately in the middle as a blind bore and opens via a transverse bore 46 into the interior space 47 formed by the inner bore 40 of the head piece 35.
  • a longitudinal bore 48 of the piston 26 opens into this, which ends approximately in the longitudinal central region of the piston 26 and opens via a transverse bore 49 with an axial channel 50 of the polygonal bushing 27.
  • the axial channel 50 is in turn connected via a bore 51 running parallel to the axis 2 ′ of the drive shaft 2 within the upper part 3 and opening into the vacuum chamber 52 of the fixed vacuum disk 8. This is connected via a pipe section 53 to a bore 54 in the cam bell 6, on which a controllable not shown Vacuum device is connected. From this vacuum device, a negative pressure can be generated in the above-described way at the suction mouth 55 of the core punch 38 for receiving the core 17, for which purpose the suction mouth 55 is designed as a receiving recess adapted to the shape of the core 17.
  • Each receiving nest 16 consists of an outer guide bush 56 which is firmly inserted into an axial bore of the die 5, a hollow outer punch 57 which is guided in the guide bush 56 and an inner punch 58 which in turn is guided in the outer punch 57.
  • An outer compression spring 59 is arranged between the outer guide bush 56 and the outer punch 57.
  • An inner compression spring 61 is arranged between the outer die 57 and a collar 60 of the inner die 58, which act on the outer die 57 or the inner die 58.
  • the lower head 62 of the inner die 58 is guided in a guide plate 63, which is screwed together with the guide bush 56 via threaded screws 64 in the die table 5.
  • the head 62 of the inner punch 58 is acted upon by a cam 65 which is mounted on the frame.
  • a radial inward movement of the transfer head 34 from the pitch circle 15 of the receiving nests 16 into the pitch circle 13 of the dies 14 is carried out under the vacuum of the axial channel 50 via the cam plate 7 and the associated radially acting compression spring 33.
  • the transfer head for the core transfer according to FIG. 2 is now located above a die 14.
  • the lower punch 11 is lowered, it is partially filled with sub powder material by a filling and metering device (not shown).
  • the core 17 is now pressed into the subpowder material located on the lower punch 11 within the die 14 by means of the transfer head 34.
  • the core punch 38 is pressed in under the action of the upper punch 19 against the action of the compression spring 47 while maintaining the vacuum.
  • the rotor 1 of the press for the production of coated core tablets rotates at a high rotational speed, so that e.g. 24 stamping tools an output of 200,000 tablets per hour can be achieved.
  • the core 17 must be pressed centrically into the sub-powder layer in order to avoid a displacement of the core 17 under the action of centrifugal forces.
  • each core punch 38 is provided with a head 66 which does not lead to the safe removal of the core punch 38 shows the guide curve shown, which ensures the vertical lifting of the core punch 38 in addition to the compression spring 47.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Preparation (AREA)
  • Press Drives And Press Lines (AREA)
  • Powder Metallurgy (AREA)
  • Glanulating (AREA)
EP91250217A 1990-08-08 1991-08-05 Presse zur Herstellung ummantelter Kerntabletten Expired - Lifetime EP0470679B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025484A DE4025484C1 (enExample) 1990-08-08 1990-08-08
DE4025484 1990-08-08

Publications (3)

Publication Number Publication Date
EP0470679A2 EP0470679A2 (de) 1992-02-12
EP0470679A3 EP0470679A3 (en) 1992-11-19
EP0470679B1 true EP0470679B1 (de) 1995-04-12

Family

ID=6412063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250217A Expired - Lifetime EP0470679B1 (de) 1990-08-08 1991-08-05 Presse zur Herstellung ummantelter Kerntabletten

Country Status (6)

Country Link
US (1) US5256046A (enExample)
EP (1) EP0470679B1 (enExample)
JP (1) JP2552211B2 (enExample)
AT (1) ATE121014T1 (enExample)
DE (2) DE4025484C1 (enExample)
ES (1) ES2071909T3 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10026731C2 (de) * 2000-05-17 2002-08-14 Fette Wilhelm Gmbh Rundläufer-Tablettenpresse für die Herstellung von mehrschichtigen Tabletten
US20040052843A1 (en) * 2001-12-24 2004-03-18 Lerner E. Itzhak Controlled release dosage forms
EA006053B1 (ru) * 2001-12-24 2005-08-25 Тева Фармасьютикал Индастриес Лтд. Твёрдая лекарственная форма, способ её изготовления и устройство
US7178562B2 (en) * 2004-04-08 2007-02-20 Graham Packaging Pet Technologies Inc. Pellet transfer apparatus and method
DE102005030312B4 (de) * 2005-06-23 2011-05-05 Korsch Ag Rundläufer-Tablettiermaschine und Verfahren zur Herstellung einer Mehrschichttablette
EP2110232B1 (de) * 2008-04-18 2016-09-14 Korsch AG Vorrichtung zum Einlegen von Einlegern in Matrizen einer Rundläufer-Tablettenpresse
DE102011051653A1 (de) 2011-07-07 2013-01-10 Lts Lohmann Therapie-Systeme Ag Quellfähige Manteltablette
CA2970599C (en) * 2013-12-11 2023-01-03 Roland Saur-Brosch Method for the production of a molding
MX2021006152A (es) * 2018-12-04 2021-08-16 Right Value Drug Stores Llc Prensa de granulos automatizada.
US20250346010A1 (en) 2022-05-18 2025-11-13 Korsch Ag Device for inserting at least one object into at least one die of a tabletting machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514486A (en) * 1945-11-21 1950-07-11 Lee B Green Molding machine
DE1023191B (de) * 1954-04-15 1958-01-23 John Holroyd & Co Ltd Verfahren und Vorrichtung zum Herstellen ueberzogener Tabletten
DE1095462B (de) * 1957-02-19 1960-12-22 John Holroyd & Company Ltd Vorrichtung zum Herstellen ueberzogener Tabletten aus auf einer Tablettenpresse hergestellten Kerntabletten
US2946298A (en) * 1957-11-13 1960-07-26 Arthur Colton Company Compression coating tablet press
US2963993A (en) * 1959-01-20 1960-12-13 John Holroyd & Company Ltd Machines for making coated tablets by compression
US3677673A (en) * 1970-08-25 1972-07-18 Pennwalt Corp Rotary press
US4292017A (en) * 1980-07-09 1981-09-29 Doepel Wallace A Apparatus for compressing tablets
US4362493A (en) * 1980-07-09 1982-12-07 Doepel Wallace A Apparatus for compressing tablets
US5088915A (en) * 1988-06-08 1992-02-18 Korsch Ohg Maschinenfabrik Coated-core press
DE9003241U1 (de) * 1990-03-17 1990-06-13 Korsch Maschinenfabrik, 1000 Berlin Rundlaufpresse

Also Published As

Publication number Publication date
DE59105154D1 (de) 1995-05-18
US5256046A (en) 1993-10-26
DE4025484C1 (enExample) 1991-10-10
JPH08132294A (ja) 1996-05-28
JP2552211B2 (ja) 1996-11-06
ATE121014T1 (de) 1995-04-15
EP0470679A3 (en) 1992-11-19
EP0470679A2 (de) 1992-02-12
ES2071909T3 (es) 1995-07-01

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