EP1600285A1 - Vorrichtung zur Herstellung von Pastillen durch Zusammenpressen - Google Patents

Vorrichtung zur Herstellung von Pastillen durch Zusammenpressen Download PDF

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Publication number
EP1600285A1
EP1600285A1 EP05356094A EP05356094A EP1600285A1 EP 1600285 A1 EP1600285 A1 EP 1600285A1 EP 05356094 A EP05356094 A EP 05356094A EP 05356094 A EP05356094 A EP 05356094A EP 1600285 A1 EP1600285 A1 EP 1600285A1
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EP
European Patent Office
Prior art keywords
tool
opening
support
matrix
tools
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
EP05356094A
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English (en)
French (fr)
Other versions
EP1600285B1 (de
Inventor
Max Linossier
Olivier Pierre Louis Marie Desmarescaux
Gérard Tolboom
Alain Gross
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.)
Eurotab SA
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Eurotab SA
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Filing date
Publication date
Application filed by Eurotab SA filed Critical Eurotab SA
Publication of EP1600285A1 publication Critical patent/EP1600285A1/de
Application granted granted Critical
Publication of EP1600285B1 publication Critical patent/EP1600285B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to a device for manufacturing pellets by compression of powder, such as a press.
  • a device for producing pellets from powder includes three horizontally stacked trays moving simultaneously in rotation about a vertical drive axis.
  • Figure 1 shows a detail of such a device.
  • the intermediate plateau 2 presents on a peripheral zone a set of through dies 3.
  • the upper plate 4 has a set of housing 5, each housing being opposite a matrix 3 of the tray intermediate 2 and for housing a punch holder 6 at the end lower of which is fixed an upper punch 7, which is thus movable in translation in the axis A of a matrix of the intermediate plateau 2.
  • the lower plate 8 has a set of 9, each housing being opposite a matrix 3 of the intermediate plate 2 and for accommodating a punch holder 9 at the end top of which is fixed a lower punch 10, which is thus movable in translation in the axis A of a matrix 3 of the intermediate plate 2.
  • the respective ends of the upper and lower punches have a section of shape and dimensions complementary to the section of a matrix 3 of the intermediate plateau, so as to be able to penetrate this matrix and to contain the powder between the wall of the matrix and the faces end of the punches.
  • the device also comprises guide means vertical translation of the upper and lower punches, not shown on FIG. 1, constituted in particular by cam tracks respectively upper and lower located above the upper plateau and below the lower plateau.
  • guide means which can be fixed, allow to guide the punches during the rotation of the lower, upper and lower trays intermediate.
  • the guide means of the upper punches make it possible to take out the upper punch of the die in order to fill it of powder for forming the pellet.
  • the lower guide means keep the lower punch in the die and push the lower punch until it completely crosses the matrix so to be able to evacuate a formed pellet.
  • compression means consisting of pebbles lower 12 and upper 13, located vertically facing below the lower tray and above the upper tray, allow to realize the formation of a tablet by compression, simultaneously exercising a pressure on the end of each punch holder respectively upper 6 and lower 9 opposite the one where the punch is fixed, when a quantity powder is maintained in a matrix 3, contained between the upper face of the lower punch 9 and the underside of the punch higher 7.
  • the compression rollers are fixed, compared to the movement horizontal rotation of the trays, the punch holder following the movement of horizontal rotation of the trays 2, 4, 8, indicated in Figure 1 by the arrow R1.
  • the matrix has a very slight shape conical close to its upper opening facilitating entry and exit of the upper punch by guiding it, this conicity not being represented on Figure 1. This taper is not present near the opening lower die, because the lower punch remains permanently in the matrix.
  • This type of device is satisfactory for the realization of pastilles of the usual type, and allows to obtain significant pressures by the presence of two punches, and to guarantee high speeds by its automating.
  • the slight taper of the upper part of the matrix prevents, especially when the matrix is worn, the production of pellets with sharp upper edges because the pellet is made in an area of the matrix with non parallel walls on its upper part. This results in an aspect gradient of the pellet, and a lack of precision in its form.
  • DE 198 55 328 is known from another pelletizing device in which a tray is provided intermediate, a plurality of lower tools entering the dies, and a unique rotary upper tool.
  • This structure has two major disadvantages. Firstly, the angular velocity of a point in the upper tool varies according to whether this point is located in the vicinity of the axis of rotation or at the periphery of the tool, which leads to obtaining pellets with different surface states, and therefore night to quality and reproducibility. On the other hand, all matrices are necessarily find themselves in the same manufacturing stage. It is therefore not possible to provide successive filling positions of a matrix, compression of the powder, ejection of the pellets where would pass successively the matrices by rotation of the plateau in which they are practiced.
  • the purpose of the invention is to provide a remedy for the problem of sticking of the pellets, and which allows a production at rates high.
  • the second tool does not enter the matrix, it is possible to create a relative movement of this tool compared to the pellet that causes a shearing effect between the end face of the tool and the pellet Training.
  • the shear thus makes it possible to prevent the pastille from sticking to the tool.
  • the invention by limiting or even eliminating problems adhesion, prevents tearing of material. As a result, it is possible to make sharp edges on the face of the pellet formed by the second tool.
  • the tools being each animated by a clean movement relative to the corresponding matrix, it is possible to carry out steps different manufacturing processes in the different matrices of the support, see products of different types.
  • the invention makes it possible to use dual operation punch, allowing the application of significant pressures and a rate of high work.
  • the drive means are arranged to cause movement of the end face of the second tool according to a translation substantially parallel to the plane of the second opening.
  • the means of training are arranged to cause a rotation of the second tool around an axis substantially perpendicular to the plane of the second opening.
  • each matrix has an axis substantially perpendicular to the plane of the second aperture and the axis of rotation of each of the second tools is substantially merged with the axis of the matrix opposite which it is disposed when in the closed position.
  • the rotational movement is particularly suitable for this application. This does not limit the shape of the matrix, because the second tool is located outside the matrix. This can therefore have a section non-circular, sectional view perpendicular to the axis.
  • the device according to the invention is therefore particularly suitable for tablets having a non-circular section, but it can of course be used for the realization of pellets of circular section.
  • the device may comprise first and second means of compression, allowing the simultaneous application of pressure on first and second tools, in opposite directions, the compartment formed by the walls of the matrix and the end of each of the tools being thus compressed, the second compression means being able to hold the face end of the second tool in contact with the second opening of the die without soliciting, in this closed position, a displacement of the second tool towards the support (in particular perpendicular to the second opening).
  • the second compression means are preferably arranged at a distance (D) from the second opening substantially equal to the length second tool, that is to say arranged relative to the support so that the minimum distance between the point of contact between the second tool and the second compression means on the one hand and the second opening of the matrix on the other hand is equal to the distance from this point on the tool to the opening in the absence of contact with the second compression means.
  • the compression means can be constituted by rollers located on either side of the support.
  • the device comprises at least one pair of first and second precompression means, allowing to simultaneously apply a pressure lower than the pressure applied by the compression means on the first and second tools, in opposite directions, the compartment formed by the walls of the matrix, and the end of each tools being thus compressed, the second precompression means being able to hold the end face of the second tool in contact with the second opening of the matrix without soliciting, in this closed position, a moving the second tool to the support.
  • the second precompression means are preferably arranged in relation to the support so that the minimum distance between the point of contact between the second tool and the second means of precompression on the one hand and the second opening of the matrix on the other hand equals the distance from this point on the tool to the opening in the absence of contact with the second precompression means (i.e. second precompression means are arranged at a distance (D) from the second opening substantially equal to the length of the second tool).
  • the precompression means may consist of rollers located on either side of the support.
  • the device may comprise at least a pair of first and second pressure maintaining means, located between the means of precompression and compression means said holding means in pressure to maintain the pressure established by the means of precompression by simultaneous support on the first and second tools, opposite directions, the second precompression means being able to maintain the end face of the second tool in contact with the second opening of the matrix without soliciting, in this closed position, a displacement of the second tool towards the support.
  • the second pressure maintaining means are preferably disposed at a distance (D) from the second opening substantially equal to the length of the second tool, that is to say arranged in relation to the support of the minimum distance between the point of contact between the second tool and the second pressurizing means on the one hand and the second opening of the matrix on the other hand is equal to the distance from this point on the tool at the opening in the absence of contact with the second means of keep in pressure.
  • the pressure maintaining means can be constituted by ramps located on either side of the support.
  • the means for maintaining pressure and means of precompression located on the same side of the support are constituted by a single ramp, articulated or not.
  • the training means in rotation of the second tool are constituted by an offset, with respect to the axis of rotation of the second tool, the point of contact between the second tool and the second means of compression, and / or of precompression and / or of maintenance in pressure, the second tool being in relative displacement with respect to these means.
  • the matrix is for example of circular section, the first tool being at least partially mobile in rotation about the axis of this matrix, the device which may comprise means for rotating the first tool.
  • the training means in rotation of the first tool are constituted by an offset, with respect to the axis of rotation of the second tool, the point of contact between the first tool and the second means of compression, and / or of precompression and / or of maintenance in pressure, the first tool being in relative displacement with respect to these means.
  • the means for rotating a tool are constituted by means of driving relative rotation of the punch relative to the punch holder.
  • At least one tool has a punch and a punch holder.
  • the device comprises at least one roller disposed on one side of the support and at a distance therefrom substantially equal to the length of the second tool, the support is rotated around its axis relative to the roller, the second tools being each engaged in a guide housing arranged substantially perpendicular to the second opening and parallel to the axis of the support in a tray secured to the rotational support, the roller being arranged so that, when the rotation of the support and second tools around the axis of the support, the point of contact between said roller and a second tool is offset transversely by relative to the axis of the housing, to cause rotation of said second tool around the housing axis.
  • the first tool can be located below the support and the second tool above the support.
  • the plates 14, 18 and 23 are integral in rotation R1 around a axis 21, said plates being arranged relative to each other so that the axis A of a given matrix 15 is substantially merged with the axis corresponding housings 19, 24.
  • the trays are shaped disc 21 axis.
  • the device 1 thus comprises a first compression tool, constituted by a lower punch 26 fixed on the lower punch holder 25.
  • lower punch 26 is engaged by the lower opening 17 of the die 15 and has a section perpendicular to the axis A of shape and dimensions complementary to the section of the lower opening 17, so as to maintain the powder inside the matrix 15.
  • the device 1 further comprises a second compression tool, constituted by the upper punch 22 fixed on the upper punch holder 20, dimension greater than the second opening, namely the upper opening 16, and able to close it.
  • the upper punch can, as in the devices of art previous, be raised above the upper opening 16 by means appropriate vertical translation guide, so that we can fill the matrix 15 with a powder intended to form the material of a layer or the entire pellet, or eject the pellet 31 formed.
  • the punch superior 22 does not enter the matrix 15, but it is applied and held in contact with the second upper opening 16, in a position shuttering, by compression means, constituted by a roller of upper compression 27 cooperating with the end of the punch holder 20 opposite to the end on which is fixed the punch 22, that is to say the upper end.
  • the upper compression roller 27 is located at a distance of intermediate plateau 14 such as the vertical distance D between the point of contact P between the punch holder 20 and the roller 27 and the upper opening 16 of the matrix 15 is equal to the distance from this point P to the opening 16 in the absence of contact with the roller 27, so as not to cause the whole punch holder 20 and upper punch 22 in vertical translation downwards, which would damage the intermediate plate 14.
  • a lower compression roller 28, located below the plate 23, can cooperate, as in the devices of the prior art, with the end of the lower punch holder 25 opposite to that where the punch is fixed lower 26, that is to say the lower end, exerting pressure on this end.
  • the lower punch 26 thus moves in vertical translation upwards along the axis A, in the matrix 15 and compresses the powder in order to make a pellet 31.
  • the function of the compression roller 27 is thus to constitute a resistance to the pressure exerted by the lower compression roller 28, for keep the upper punch 22 in contact with the upper opening 16, thus guaranteeing the tightness of the compartment formed by the wall of the matrix 15, the upper face of the lower punch 26 and the underside of the punch higher 22.
  • the upper punch 22 Since the upper punch 22 is located outside the matrix, it can be mobile in rotation around an axis, and in particular the axis A, whatever the shape of the matrix 15, which may have a non-circular section, sectional view perpendicular to the axis A.
  • the rotation of the upper punch 22 causes a movement of shear between the end face of the punch and the upper face of the forming pellet 31, which makes it possible to prevent the glue 31 from sticking to the punch 22.
  • the device 1 comprises means for rotating the upper punch along the axis A, constituted in this embodiment by a horizontal offset d with respect to the axis A of the point of contact P between the roller of upper compression 27 and the upper punch holder 22, as illustrated in figure 4. It should be noted that, for simplicity, have not been represented on this figure the lower trays 23 and upper 18, nor the lower punches 26. In addition, only one superior tool has been represented.
  • the punch holder 20 according to the horizontal rotation movement trays 14, 18, 23, indicated in the figures by the arrow R1, and the roller 27 being not animated by a movement of horizontal movement, the shift of the point of contact P with respect to the axis A makes it possible to create a movement of rotation of the punch holder with respect to the axis A, as represented by the arrow R2.
  • FIG. device 1 comprises all the elements of the first embodiment, these elements bearing the same references.
  • the device 1 further comprises, upstream of the rollers of compression 27, 28 with respect to the direction of rotation (R1) of the plates 14, 18, 23, a pair of pebbles of higher precompression 29 and lower 30, located vertically facing each other, respectively above the plateau 18 above and below the lower plate 23, these elements being fixed relative to the horizontal movement (R1) of rotation of the plates 14, 18, 23.
  • the upper precompression roller 29 cooperates with the end upper punch holder 20, this roller 29 being disposed at a distance from the intermediate plate 14 such as the point of contact between the roller 29 and the punch holder 20 is located at the vertical distance D defined previously with respect to the upper opening 16 of the die 15, in order to do not drive the punch holder assembly 20 and punch 22 higher in vertical translation downwards, which would damage the plateau intermediate 14.
  • the device 1 comprises a holding ramp in pressure 32, whose point of contact with the upper end of the punch holder upper 22 is located at the vertical distance D, also in order to not cause the entire punch holder 20 and punch 22 higher in vertical translation downwards, which would damage the plateau intermediate 14.
  • the precompression roller 30 lower part intended to cooperate with the lower end of a punch holder lower 26 is arranged to vertically move the lower punch 26 in the matrix so as to establish a first compression pressure, greater than the pressure established upstream of the passage of the punch 26 facing of the precompression roller 30.
  • the function of the upper precompression roller 29 is thus constitute a resistance to the pressure exerted by the precompression roller lower 30, to maintain the upper punch 22 in contact with the opening 16, thereby ensuring the tightness of the compartment formed by the wall of the die 15, the upper face of the lower punch 26 and the face lower part of the upper punch 22.
  • the device comprises a pressurization ramp 33, intended to cooperate with the lower end of a punch holder lower 26 and which allows to maintain the pressure established by the rollers of precompression 29, 30.
  • the vertical distance D1 between the point of contact between the ramp 33 and the lower punch holder 26 on the one hand, and the lower opening 17 on one matrix 15 on the other hand is equal to the vertical distance between the point of contact between the lower precompression roller 30 and the lower punch holder 26 on the one hand, and the lower opening 17 of a matrix 15 on the other hand.
  • This distance is greater than the distance D2 between the point of contact between the lower compression roller 28 and the punch holder lower 26 on the one hand, and the lower opening 17 of a matrix 15 on the other hand, the lower compression roller 27 imposing a pressure greater than the roller precompression 30 and ramp 33.
  • the point of contact between the upper ramp 32 and the punch holder upper 22 has a horizontal offset with respect to the axis A.
  • the device as described makes it possible to apply compression up to values of the order of 150 to 200 kN, in the case of lozenge up to 55 or 60 mm in diameter, and order values 600kN, in the case of pellet up to 100 mm.
  • the face of the upper punch 22 closing the upper opening 16 of the matrix 15 may be flat as in the embodiment shown in the figures, but may also, in the case of a punch driven in rotation about an axis A, to present a profile having a symmetry of revolution with respect to the axis A.
  • a precompression roller and a ramp located on the same side of the support can be replaced by a ramp articulated or not, to apply pressure on the punches.
  • different rotation means may be implemented, in particular to ensure a speed of superior rotation, with dedicated drive means.
  • these means can allow the relative rotation of the punch relative to the punch holder.
  • the point of support of the precompression rollers, the ramp and the roller of lower compression is offset with respect to the axis, thus causing a rotation of the lower punch also.
  • the tools consist of a punch holder and a punch. It is however obvious for the skilled person to replace these tools with a tool not presenting only one piece.
  • the matrix is fixed.
  • the matrix can slide on guides parallel to its axis principal, to accompany the movement of the second compression tool. This movement can occur either passively, under the pressure of displacement exerted by the second tool, or actively.
  • This mode particular of the invention makes it possible to apply an even more effective pressure on the tablet, by means of the second tool, and allows all modes of realization of the fixed matrix.
  • a mode of more specific realization is to equip the matrix of means of recall generating a weak elastic force opposite to the direction of movement of the second compression tool and allowing the return of the matrix to its position original at the end of the compression cycle.
  • the movement of the matrix can be provided by ramps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press Drives And Press Lines (AREA)
EP20050356094 2004-05-25 2005-05-25 Vorrichtung zur Herstellung von Pastillen durch Zusammenpressen Active EP1600285B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0405629A FR2870777B1 (fr) 2004-05-25 2004-05-25 Dispositif de fabrication de pastilles par compression
FR0405629 2004-05-25

Publications (2)

Publication Number Publication Date
EP1600285A1 true EP1600285A1 (de) 2005-11-30
EP1600285B1 EP1600285B1 (de) 2015-04-22

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EP20050356094 Active EP1600285B1 (de) 2004-05-25 2005-05-25 Vorrichtung zur Herstellung von Pastillen durch Zusammenpressen

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EP (1) EP1600285B1 (de)
ES (1) ES2539785T3 (de)
FR (1) FR2870777B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1666237A2 (de) 2004-10-20 2006-06-07 Fette GmbH Rundlaufpresse
WO2010007152A1 (fr) * 2008-07-18 2010-01-21 Eurotab Dispositif pour former des tablettes par compaction a volume constant
US8647567B2 (en) 2011-04-06 2014-02-11 The Clorox Company Methods of providing uniform delivery of a functional agent from a shaped composition
US9603376B2 (en) 2009-04-09 2017-03-28 The Folger Coffee Company Ground roast dual compressed coffee tablet
US9756869B2 (en) 2009-04-09 2017-09-12 The Folger Coffee Company Ground roast dual compressed coffee tablet

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE417095C (de) 1922-09-16 1925-08-08 Hans Spengler Presse mit ununterbrochen sich drehendem Formtisch fuer Platten oder Steine aus pulverfoermigen Massen
US3677673A (en) 1970-08-25 1972-07-18 Pennwalt Corp Rotary press
JPS50144179A (de) * 1974-05-08 1975-11-19
GB2031788A (en) * 1978-10-19 1980-04-30 Ptx Pentronix Apparatus and method for compacting prismatic or pyramidal articles from powder material
US5928590A (en) * 1993-12-10 1999-07-27 I.M.A. Industria Macchine Automatiche S.P.A. Compression method for powder of granular material
DE19844337A1 (de) 1998-09-28 2000-03-30 Prinzing Georg Gmbh Co Kg Verfahren und Einrichtung zum Herstellen mindestens eines Betonteils
DE19855328A1 (de) * 1998-12-01 2000-06-08 Henkel Kgaa Tablettenpresse
DE19963263A1 (de) 1999-03-18 2000-09-28 Korsch Pressen Ag Rundlaufpresse mit auswechselbaren Einsatzstempeln
EP1273393A2 (de) * 2001-07-03 2003-01-08 Ntn Corporation Schleifschlammverdichtungsmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE417095C (de) 1922-09-16 1925-08-08 Hans Spengler Presse mit ununterbrochen sich drehendem Formtisch fuer Platten oder Steine aus pulverfoermigen Massen
US3677673A (en) 1970-08-25 1972-07-18 Pennwalt Corp Rotary press
JPS50144179A (de) * 1974-05-08 1975-11-19
GB2031788A (en) * 1978-10-19 1980-04-30 Ptx Pentronix Apparatus and method for compacting prismatic or pyramidal articles from powder material
US5928590A (en) * 1993-12-10 1999-07-27 I.M.A. Industria Macchine Automatiche S.P.A. Compression method for powder of granular material
DE19844337A1 (de) 1998-09-28 2000-03-30 Prinzing Georg Gmbh Co Kg Verfahren und Einrichtung zum Herstellen mindestens eines Betonteils
DE19855328A1 (de) * 1998-12-01 2000-06-08 Henkel Kgaa Tablettenpresse
DE19963263A1 (de) 1999-03-18 2000-09-28 Korsch Pressen Ag Rundlaufpresse mit auswechselbaren Einsatzstempeln
EP1273393A2 (de) * 2001-07-03 2003-01-08 Ntn Corporation Schleifschlammverdichtungsmaschine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1666237A2 (de) 2004-10-20 2006-06-07 Fette GmbH Rundlaufpresse
EP1666237A3 (de) * 2004-10-20 2006-10-18 Fette GmbH Rundlaufpresse
WO2010007152A1 (fr) * 2008-07-18 2010-01-21 Eurotab Dispositif pour former des tablettes par compaction a volume constant
FR2933897A1 (fr) * 2008-07-18 2010-01-22 Eurotab Dispositif pour former des tablettes par compaction a volume constant
US8764430B2 (en) 2008-07-18 2014-07-01 Eurotab Device for forming tablets by constant volume compaction
US9603376B2 (en) 2009-04-09 2017-03-28 The Folger Coffee Company Ground roast dual compressed coffee tablet
US9756869B2 (en) 2009-04-09 2017-09-12 The Folger Coffee Company Ground roast dual compressed coffee tablet
US8647567B2 (en) 2011-04-06 2014-02-11 The Clorox Company Methods of providing uniform delivery of a functional agent from a shaped composition
US8920743B2 (en) 2011-04-06 2014-12-30 The Clorox Company Faucet mountable water conditioning devices
US8955536B2 (en) 2011-04-06 2015-02-17 The Clorox Company Faucet mountable water conditioning systems

Also Published As

Publication number Publication date
FR2870777B1 (fr) 2007-09-14
EP1600285B1 (de) 2015-04-22
ES2539785T3 (es) 2015-07-06
FR2870777A1 (fr) 2005-12-02

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