EP0823324A1 - Presse de fabrication de tablettes à table tournante - Google Patents

Presse de fabrication de tablettes à table tournante Download PDF

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Publication number
EP0823324A1
EP0823324A1 EP96870104A EP96870104A EP0823324A1 EP 0823324 A1 EP0823324 A1 EP 0823324A1 EP 96870104 A EP96870104 A EP 96870104A EP 96870104 A EP96870104 A EP 96870104A EP 0823324 A1 EP0823324 A1 EP 0823324A1
Authority
EP
European Patent Office
Prior art keywords
dies
turret
product
punches
enclosed space
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.)
Withdrawn
Application number
EP96870104A
Other languages
German (de)
English (en)
Inventor
Koen Van De Voorde
Antonie Van Zegbroeck
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.)
GEA Process Engineering NV
Original Assignee
Courtoy NV
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 Courtoy NV filed Critical Courtoy NV
Priority to EP96870104A priority Critical patent/EP0823324A1/fr
Publication of EP0823324A1 publication Critical patent/EP0823324A1/fr
Withdrawn legal-status Critical Current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
    • B30B11/02—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
    • B30B15/0023—Drive arrangements for movable carriers, e.g. turntables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0082—Dust eliminating means; Mould or press ram cleaning 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
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses

Definitions

  • the present invention relates to a rotary tablet press comprising a rotating turret provided with peripheral dies, a feeder system for introducing product for the tablets into the dies, a scraper for scraping off excess of product introduced in the dies, a series of lower and upper punches which are slidably fixed to said turret and arranged to compress the product introduced in said dies according to a cyclic movement into tablets and a lower and upper cam cooperating respectively with said lower and upper punches to move these punches according to said cyclic movement upon rotation of the turret.
  • the compression module of the current classic rotary presses using gravity feed are composed of a turret featuring a number of positions with three vertical holes in each of these positions. These positions are equally distributed on the pitch diameter of the turret.
  • the top hole is guiding an upper punch, in the central hole a die is located, the bottom hole is used to guide a lower punch.
  • the rotation of the turret moves the punches through a sequence of cams and rollers to produce the tablets.
  • the cycle to produce one tablet is one of the positions going sequentially through the following steps.
  • the cycle starts at overfill where the upper punch is in its highest position and the lower punch in its lowest position allowing the feeder system to fill the cavity of the die with the product for the tablet, which may be either a powder or a granulate.
  • the upper and lower punches are moved with force towards each other in order to press the material together and form the tablet, this step can happen in one or two steps.
  • the last step is when the upper and lower punches move upwards to eject the tablet from the die and the press.
  • the positions are moved through the different steps by the rotation of the turret.
  • the feeder system is an external feature used to bring a volume of powder in the die by gravity.
  • This feeder system is located on the periphery of the turret.
  • the die passes under the feeder the die is filled with the volume of product determined by the position of the lower punch in the die.
  • the lower punch is moved up to an adjustable position allowing the correct volume of product to be kept in the die by scraping away the excess of granulate or powder.
  • An object of the present invention is therefore to obviate the hereinabove described drawbacks by providing a rotary tablet press of the gravity feed type showing less product losses during operation.
  • the tablet press according to the invention is characterized in that said turret comprises a circumferential upstanding wall around said dies defining an enclosed space which forms part of the feeder system and which is adapted to contain a supply of the product, the scraper being arranged in said enclosed space and said punches and said cams being arranged to eject the produced tablets from the bottom of said dies.
  • the product for the tablets is fed in the tablet press according to the invention internally to the dies, more particularly within the enclosed space in the turret. This is achieved both by the centrifugal forces which urge the product contained in the enclosed space towards the peripheral portion thereof and by gravity. Since the steps of filling the dies with product, scraping off the excess of product and compressing the product are performed within the enclosed space, no product will be lost during these steps.
  • centrifugal forces are relatively small compared to the known tablet presses using a feeder system based on centrifugal forces, so that no problems arise in the press according to the present invention with respect to density gradients in the tablets.
  • said feeder system comprises a feeder tube disposed down-wardly above the bottom of said enclosed space, at the inner-side of said dies, and having its outlet situated at a distance from said bottom so as to form a gap allowing said product to flow out of said tube.
  • the rotary tablet press which is schematically shown in Figures 1 to 3 comprises a frame, only the connections 1 of which are shown, a motor 2, a drive shaft 3 mounted into bearings 4 and a turret 5 carrying the tools for making the tablets.
  • the turret 5 consists of an upper 6 and a lower sub-turret 7 which are removably mounted onto each other, for example by means of screws which have not been shown in the figures.
  • the lower sub-turret 7 is fixed by means of a screw 8 and a wedge 9 to the drive shaft 3.
  • the dies 10 for making the tablets are fixed by means of screws 11 into peripheral holes 12 in the upper sub-turret 6.
  • the upper sub-turret 6 further comprises upper 13 and lower punches 14 which are slidably fixed thereto and which are arranged to cooperate with one another to compress product of which the tablets are to be made in the dies 10. This compression process is performed according to a cyclic movement upon rotation of the turret 5.
  • the upper 13 and lower punches 14 cooperate respectively with an upper 15 and a lower cam 16, the shape of which is adapted in a known manner to the cyclic movement to be performed by the punches 13 and 14.
  • the cams 15 and 16 are fixed with respect to the frame of the tablet press.
  • the lower punches 14 cooperate with the lower cam 16 through the intermediary of punchholders 17 which are slidably mounted in the lower sub-turret 7.
  • the lower punches 14 continuously engage these punch holders 17 due to the fact that they are resiliently urged thereto by means of springs 18.
  • the upper punches 13 and the lower punch holders 17 are provided with a mushroom head 19 but it will be clear that instead of mushroom heads 19 it is for example also possible to user rollers.
  • the cams 15 and 16 show grooves corresponding to the mushroom heads 19.
  • upper 20 and lower rollers 21 are further fixed with respect to the upper 15 and lower cams 16 and roll over the mushroom heads 19 to increase the pressure thereon. These rollers 20 and 21 can be seen on the right hand side of Figure 1.
  • the turret 5, more particularly the upper sub-turret 6, comprises a circumferential upstanding wall 22 around the dies 10, or in other words around the die table 23, thus defining an enclosed space 24 in the upper sub-turret 6.
  • this enclosed space 24 comprises a supply of product which is urged towards the circumferential wall 22, and thus towards the peripheral dies 10, due to the centrifugal forces generated by the rotation of the turret 5.
  • the enclosed space 24 thus forms part of the feeder system for introducing the product of which the tablets are to be made into the dies 10.
  • This feeder system preferably further comprises a feeder tube 25 disposed downwardly above the bottom of the enclosed space 24, i.e. above the die table 23, but this not above the dies 10 themselves as in the know gravity feed tablet presses, but at the innerside thereof.
  • the feeder tube 25 is fixed with respect to the frame 1 of the tablet press to have its outlet situated at a distance from the die table 23. In this way, the product can flow out of the feeder tube 25 through the gap between its outlet and the die table 23.
  • the supply of product in the enclosed space 24 will be maintained automatically at the required level by continuous introduction of additional product from a container, in particular a funnel-shaped container 26, disposed on top of the feeder tube 25.
  • a container in particular a funnel-shaped container 26, disposed on top of the feeder tube 25.
  • the outflow of product from the feeder tube 25 will automatically be limited by the amount of product which is already present in the enclosed space 24, especially in the preferred embodiment as shown in the figures wherein the feeder tube 25 ends centrally in the enclosed space 24, i.e. centrally with respect to the rotation axis of the turret 5.
  • This central position of the feeder tube 25 allows further to close off the enclosed space 24 also at the top, in particular by means of a cover 29 fixed within the circle formed by the upper punches 13 to the top of the upper sub-turret 6.
  • a scraper 27 is also provided for scraping off excess of product from the dies 10.
  • This scraper 27 can for example be fixed to the feeder tube 25 and extends obliquely towards the upstanding wall 22 around the dies 10. The particular shape and position of the scraper 27 can be seen in Figure 3.
  • the compression cycle performed by the table press according to the present invention is defined by the shape of the upper and lower cams 15 and 16 and corresponds in principle to the compression cycle according to the known gravity feed tablet presses so that the compression cycle itself will not be described much into detail.
  • an essential difference with the known tablet presses is that the tablets are not ejected from the top but instead from the bottom of the dies 10 as shown in Figure 2.
  • the working of the tablet press can be described as follows.
  • a first phase of the compression cycle which takes place in front of the scraper 27, the dies are filled by gravity with product which is forced under the influence of the centrifugal forces towards the periphery of the enclosed space 24.
  • the upper punches 13 are in their highest position whilst the lower punches 14 are within the dies, defining a volume which may be somewhat greater than the volume of product required to make on tablet.
  • the lower punches 14 are subsequently moved upwards to the required level, after which the dies pass under the scraper 27.
  • This scraper 27 does not only scrapes off the excess of product situated on top of the dies 10, but conveys this product towards the centre of the die table 23.
  • the upper punches 13 are lowered into the dies 10, the complete compression being achieved at the location of the upper and lower rollers 20 and 21 shown in Figure 1.
  • both the upper and lower punches move downwards to eject the tablets from the bottom of the dies, more particularly in the tablet chute 30 which can be seen in figure 2.
  • the upper punches 13 are removed from the dies 10 whilst the lower punches 14 enter the dies 10 from beneath so that the die cavities can be filled again with product.
  • the main advantage of the tablet press according to the present invention is first of all that product losses during the production can be eliminated due to the fact that the filling of the die cavities and the compression process are performed within an enclosed space. This reduces also considerably the risks that an operator may come into contact with noxious products either during the production or when removing the upper sub-turret.
  • a further advantage of the above described embodiment is that the funnel-shaped container 26, the feeder tube 25 and the upper sub-turret 6, comprising the upper and lower punches 13, 14 and the dies 10 can quickly be replaced so that a minimum of production time is lost when changing over to another product and/or when these parts have to be cleaned.
  • the new turret structure according to the present invention is that it is very suited for being cleaned in place.
  • the upper sub-turret 6 can first of all be cleaned by means of a vacuum cleaner either through the feeder tube 25 or by removing the cover 29. Subsequently, hot or cold cleaning liquids can be introduced into the upper sub-turret 6 through the same ways, either with or without pressure, and can be extracted therefrom after the corresponding cleaning cycle is completed. This cleaning process can be repeated as many times as required.
  • the sub-turret is dried with cold or hot air blown for example through the feeder tube 25.
  • the cleaning liquids which escape through the necessary play between punches and dies 10 will be drained by a therefore provided collector 31.
  • the section of the lower punches outside the sub-turret is cleaned with spray nozzles 32 while cleaning liquid is also drained by the collector 31, this process is repeated as many times as necessary.
  • the outside of the tablet press can be dried subsequently with air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
EP96870104A 1996-08-09 1996-08-09 Presse de fabrication de tablettes à table tournante Withdrawn EP0823324A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96870104A EP0823324A1 (fr) 1996-08-09 1996-08-09 Presse de fabrication de tablettes à table tournante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96870104A EP0823324A1 (fr) 1996-08-09 1996-08-09 Presse de fabrication de tablettes à table tournante

Publications (1)

Publication Number Publication Date
EP0823324A1 true EP0823324A1 (fr) 1998-02-11

Family

ID=8226158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96870104A Withdrawn EP0823324A1 (fr) 1996-08-09 1996-08-09 Presse de fabrication de tablettes à table tournante

Country Status (1)

Country Link
EP (1) EP0823324A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071419A1 (fr) * 1999-05-21 2000-11-30 Glaxo Group Limited Chargement d'un produit dans un recipient et appareil a cet effet
ES2157726A1 (es) * 1998-06-12 2001-08-16 Bonals S A J Perfeccionamientos en las maquinas rotativas para la fabricacion de comprimidos.
WO2002074528A1 (fr) * 2001-03-16 2002-09-26 I.M.A Industria Macchine Automatiche S.P.A. Presse pour comprimes
US7661447B2 (en) 2002-04-04 2010-02-16 Glaxo Group Limited Method and apparatus for loading a container with a product
WO2009127557A3 (fr) * 2008-04-16 2010-10-21 Oystar Manesty Machine de compression de comprimé
CN110356034A (zh) * 2019-07-17 2019-10-22 贵州云峰药业有限公司 基于固定制剂加工的高速旋转式压片机
CN111644500A (zh) * 2020-06-15 2020-09-11 朱景梅 一种钣金件冲压设备
CN112590282A (zh) * 2020-11-27 2021-04-02 四川广鑫粮油机械制造有限公司 油品清亮的榨条式榨油机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1070587A (en) * 1964-09-16 1967-06-01 V Nauciino I I T Electromashin Method and apparatus for compressing flowable powder materials
US3566806A (en) * 1968-07-25 1971-03-02 Manesty Machines Rotary tabletting machines
SU770836A1 (ru) * 1978-11-30 1980-10-15 Предприятие П/Я В-8906 Автомат дл таблетировани порошка
FR2625461A1 (fr) * 1987-12-30 1989-07-07 Ima Spa Machine a comprimer pour la production de comprimes
SU1648791A1 (ru) * 1988-10-04 1991-05-15 Мариупольский Филиал Специального Проектно-Конструкторского Бюро Медицинской И Микробиологической Промышленности Ленинградского Научно-Производственного Объединения "Прогресс" Роторна таблеточна машина
WO1995015846A1 (fr) * 1993-12-10 1995-06-15 I.M.A. Industria Macchine Automatiche S.P.A. Machine rotative de fabrication de comprimes
EP0743169A2 (fr) * 1995-05-18 1996-11-20 BWI plc Presse de fabrication de tablettes à table tournante

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1070587A (en) * 1964-09-16 1967-06-01 V Nauciino I I T Electromashin Method and apparatus for compressing flowable powder materials
US3566806A (en) * 1968-07-25 1971-03-02 Manesty Machines Rotary tabletting machines
SU770836A1 (ru) * 1978-11-30 1980-10-15 Предприятие П/Я В-8906 Автомат дл таблетировани порошка
FR2625461A1 (fr) * 1987-12-30 1989-07-07 Ima Spa Machine a comprimer pour la production de comprimes
SU1648791A1 (ru) * 1988-10-04 1991-05-15 Мариупольский Филиал Специального Проектно-Конструкторского Бюро Медицинской И Микробиологической Промышленности Ленинградского Научно-Производственного Объединения "Прогресс" Роторна таблеточна машина
WO1995015846A1 (fr) * 1993-12-10 1995-06-15 I.M.A. Industria Macchine Automatiche S.P.A. Machine rotative de fabrication de comprimes
EP0743169A2 (fr) * 1995-05-18 1996-11-20 BWI plc Presse de fabrication de tablettes à table tournante

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8126, Derwent World Patents Index; Class J04, AN 81-47436D, XP002021908 *
DATABASE WPI Section PQ Week 9215, Derwent World Patents Index; Class P71, AN 92-121942, XP002021898 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2157726A1 (es) * 1998-06-12 2001-08-16 Bonals S A J Perfeccionamientos en las maquinas rotativas para la fabricacion de comprimidos.
US7650733B2 (en) 1999-05-21 2010-01-26 Glaxo Group Limited Method and apparatus for loading a container with a product
AU769296B2 (en) * 1999-05-21 2004-01-22 Glaxo Group Limited Method and apparatus for loading a container with a product
US7426815B1 (en) 1999-05-21 2008-09-23 Smithkline Beecham Corporation Method and apparatus for loading a container with a product
WO2000071419A1 (fr) * 1999-05-21 2000-11-30 Glaxo Group Limited Chargement d'un produit dans un recipient et appareil a cet effet
WO2002074528A1 (fr) * 2001-03-16 2002-09-26 I.M.A Industria Macchine Automatiche S.P.A. Presse pour comprimes
US6997691B2 (en) 2001-03-16 2006-02-14 I.M.A. Industria Macchine Automatiche S.P.A. Tablet press machine
US7661447B2 (en) 2002-04-04 2010-02-16 Glaxo Group Limited Method and apparatus for loading a container with a product
WO2009127557A3 (fr) * 2008-04-16 2010-10-21 Oystar Manesty Machine de compression de comprimé
US8435357B2 (en) 2008-04-16 2013-05-07 Bwi Plc Tablet compressing machine
CN110356034A (zh) * 2019-07-17 2019-10-22 贵州云峰药业有限公司 基于固定制剂加工的高速旋转式压片机
CN110356034B (zh) * 2019-07-17 2024-05-10 贵州云峰药业有限公司 基于固定制剂加工的高速旋转式压片机
CN111644500A (zh) * 2020-06-15 2020-09-11 朱景梅 一种钣金件冲压设备
CN112590282A (zh) * 2020-11-27 2021-04-02 四川广鑫粮油机械制造有限公司 油品清亮的榨条式榨油机
CN112590282B (zh) * 2020-11-27 2022-11-04 四川广鑫粮油机械制造有限公司 油品清亮的榨条式榨油机

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