EP0365447A1 - Method and apparatus for compressing and controlling the compression of powdery materials, and press using such a method and apparatus - Google Patents

Method and apparatus for compressing and controlling the compression of powdery materials, and press using such a method and apparatus Download PDF

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Publication number
EP0365447A1
EP0365447A1 EP89420394A EP89420394A EP0365447A1 EP 0365447 A1 EP0365447 A1 EP 0365447A1 EP 89420394 A EP89420394 A EP 89420394A EP 89420394 A EP89420394 A EP 89420394A EP 0365447 A1 EP0365447 A1 EP 0365447A1
Authority
EP
European Patent Office
Prior art keywords
force
punch
height
compaction
compaction force
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
EP89420394A
Other languages
German (de)
French (fr)
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EP0365447B1 (en
Inventor
Roger Le Molaire
Dominique Henry André Gavotto
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ADL AUTOMATION A RESPONSABILITE Ltee Ste
Original Assignee
ADL AUTOMATION A RESPONSABILITE Ltee Ste
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Application filed by ADL AUTOMATION A RESPONSABILITE Ltee Ste filed Critical ADL AUTOMATION A RESPONSABILITE Ltee Ste
Priority to AT89420394T priority Critical patent/ATE93768T1/en
Publication of EP0365447A1 publication Critical patent/EP0365447A1/en
Application granted granted Critical
Publication of EP0365447B1 publication Critical patent/EP0365447B1/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0041—Control arrangements therefor
    • 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
    • B30B11/005—Control arrangements
    • 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
    • B30B11/027—Particular press methods or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
    • F42B33/025—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by compacting

Definitions

  • the present invention relates to the compacting of pulverulent materials in a container and it relates, more particularly, to the compacting of pre-compacted or non-spilled pulverulent materials in doses which must be successively compacted in containers in the form of cases intended to constitute cartridges. with pyrotechnic effect, for example.
  • the invention relates to all applications in which or for which it is necessary to compact, compact or compress pulverulent materials placed in containers.
  • the height of the compacted material and the pressure imposed on the material constitute two criteria which play a primordial role in the behavior of the final products, during their subsequent use. Furthermore, non-compliance with these criteria, at determined values, sometimes leads to the explosion of these products during their manufacture, causing significant damage to the environment in which they are produced.
  • the cylinders are moved until the compaction and / or height values correspond to respective values of force and / or height setpoint.
  • the values of compaction and / or height are checked to ensure that they are between maximum and minimum values.
  • a disadvantage of the press described above lies in the fact that the latter does not make it possible to know precisely the actual height of packed material and / or the actual pressure imposed on the material. Such uncertainties about the real height of the compacted material and the real pressure imposed on the material do not allow obtaining final products with precise and reproducible characteristics.
  • such a press by its structure, does not allow to take into account the mechanical tolerances and the elasticity of the various organs constituting it, so that the measurements carried out are always affected by errors.
  • the object of the invention is, precisely, to remedy the above drawbacks, by proposing a new compacting device adapted to precisely know the actual height of packed material and / or the actual pressure imposed on the material, so as to act on the punch to obtain the desired height and / or pressure.
  • Another object of the invention is to propose a compacting device offering a capacity for easy and precise adjustment of the height and pressure criteria, over very wide ranges of values.
  • An additional object of the invention is to provide a press designed to receive at least one compacting device according to the invention, making it possible to perform reproducible and precise compression-compression operations in order to obtain, by machine-transfer, the manufacturing in large series of pyrotechnic cartridges of substantially the same characteristics.
  • a further object of the invention is to provide a method for measuring and correcting the elasticity of a suitable compacting device on a press.
  • the apparatus for controlling the compression of doses of pulverulent materials comprises: - a pin for controlling the compaction force comprising: . a screw-nut system driven in rotation by a drive member, . a housing provided with at least one force sensor, interposed between the screw-nut system and the punch and able to be moved in sliding by the screw-nut system, - And a control circuit of the drive member in relation to the successive measured values of the compaction force and with a force reference value.
  • the method of controlling a compression control device of the type consisting in setting a set value of the compaction force and / or of the height to be reached less than a corresponding maximum value not to be exceeded, and to control in displacement of the punch until the compaction or height force measured reaches the corresponding set value, is characterized in that it consists, after the compaction force has reached the corresponding set value: - to measure the maximum force during the cycle, - to measure the residual compaction force to examine its evolution.
  • the compacting press according to the invention is illustrated in the form of an assembly forming part of a transfer machine.
  • a transfer machine can comprise a basic structure 1 supporting guide rails 2 parallel to each other, intended to provide support, sliding and guiding of two flexible drive members 3 , such as two chains of the Galle type, established in form of two endless loops.
  • the drive members 3 are designed to move the carriages 4 carrying containers, such as cases 5 , in front of loading stations for pulverulent products and / or compacting stations and then, then, to packing stations, closing, unloading, etc.
  • This list is given only by way of limitation because a transfer machine can include as many as there are posts with functional, multiple characters, depending on the product to be manufactured.
  • the transfer machine also comprises means 6 making it possible to immobilize the carriages 4 directly above each work station.
  • the object of the invention can also be achieved in the form of a single unitary work station, without being part of a transfer machine.
  • the compacting press comprises a frame 7 , in the form of a table, supporting the basic structure 1 , and a vertical frame 8 in the form of a gantry.
  • the table 7 guides in vertical sliding a plate 9 able to be moved by a jack 10 carried by the table and assuming a rapid approach function or allowing a large passage opening.
  • the plate 9 supports at least one tubular riser 5 a for filling and centering, intended to be positioned in the extension of a case 5 .
  • the frame 8 is constituted by two uprights 11 arranged on either side of the vertical plane of symmetry PP ′ of the press. The uprights 11 rise vertically from the table 7 and are joined by a horizontal upper cross member 12 and by a cross member protective intermediate 13 .
  • the upper cross member 12 supports a main cylinder 14 , preferably of the double-acting hydraulic type.
  • the cylinder 14 comprises a piston rod 15 oriented vertically and mounted axially and angularly integral with a vertical frame 16 ensuring the support of at least one and, for example, two devices 17 for compression and control of the compaction force , arranged on either side of the plane of symmetry PP ′ .
  • the vertical frame 16 is formed by two columns 18 located symmetrically with respect to the plane PP ′ and guided in vertical sliding by bearings 19 mounted on the intermediate crosspiece 13 .
  • the columns 18 are joined by a horizontal upper cross member 21 , by a central plate 22 disposed below the intermediate cross member 13 and by a sub-plate 23 whose function will be better understood in the following.
  • Each device 17 comprises a pin 24 for controlling the compaction force and a circuit 25 for controlling the spindle, the function of which will be better understood in the following.
  • the control pin 24 is constituted by a tubular cylinder 26 formed, in the example illustrated, of three parts 26 a -26 c .
  • the cylinder 26 rises vertically from the central plate 22 and passes right through the intermediate cross member 13 through an opening 27 formed in this cross member.
  • the cylinder 26 is made integral with the central plate 22 , in any suitable manner, and ensures the mounting of a screw-nut system 28 driven in rotation by a motor member 29 .
  • the screw-nut system 28 is constituted by a rod 30 guided in rotation by bearings 31 carried by the cylinder and more particularly adapted to support axial loads.
  • the rod 30 is rotated by the motor member 29 , preferably of the electrical type, the speed of rotation of which is controlled by the servo-control circuit 25 .
  • the driving member 29 is fitted to a cap 32 which is mounted on the upper end portion 26 a of the cylinder.
  • the motor member 29 rotates the rod 30 using a pinion transmission 33 .
  • the drive member 29 can be mounted in the axial extension of the rod 30 or communicate its movement by a different transmission of all types known per se.
  • the terminal portion 30 has upper stem is mounted integral, by a direct coupling 34, a sensor 35 position and angular displacement of the rod 30, formed, for example, by a digital encoder fitted to the cap 32 .
  • the information delivered by the sensor 35 is transmitted to the control circuit 25 . It should be noted that provision could be made to associate the sensor 35 with the drive member 29 , taking account, where appropriate, of the transformation ratio of the transmission 33 .
  • the rod 30 has an end portion 30 b of less intended to cooperate with an internal thread 36 of a ring nut 37 which is angularly connected to the cylinder 26 and slidably guided in the cylinder.
  • the nut-ring 37 is linked in rotation to the cylinder 26 by keys 38 and is guided in axial displacement by a bush 39 .
  • the nut ring 37 has, at its terminal part, a thread 371 intended to receive a threaded extension 41 which is fixed to a body 42 sliding in a housing 43 .
  • the position of the body 42 is adjusted vertically in relation to the screwing of the extension 41 in the ring-nut 37 .
  • the extension 41 includes a nut 44 for locking the body in a fixed position.
  • the body 42 is provided with an upper collar 421 intended to cooperate with a sensor 45 adapted on the underside of the central plate 22 ensuring the end-of-travel positioning of the body and making it possible to determine the initialization of the encoder 35 .
  • the collar 421 of the body defines with the housing 43 a clearance authorizing the axial sliding of the body 42 in the housing 43 .
  • the body 42 is provided with a head 422 requesting a force sensor 46 mounted in the housing.
  • the force sensor 46 for example of the gauge type, is capable of delivering, to the servo circuit 25 , a signal in relation to the compressive stresses to which it is subjected.
  • the force sensor 46 is intended to be stressed in compression by means of a cylindrical pilot 48 , by a punch 51 whose general shape is determined as a function of the conformation of the case 5 and / or the effect compression, compaction or compaction to be produced or imposed on the dose or doses of powdery materials.
  • the punch 51 is mounted in a sheath 52 which is removably fitted to the housing 43 .
  • the sheath 52 passes through the sub-plate 23 while being guided axially by a ring 53 mounted on the sub-plate and making it possible to obtain the positioning of the punch 51 .
  • the compacting force control apparatus fitted on a press and described above, operates as follows.
  • the jack 14 When a dose of pulverulent material has to be packed, compressed or compacted inside the case 5 into which it has been poured by any suitable means, the jack 14 is supplied, so as to cause the extension stroke of the piston rod 15 which drives the frame 16 in its downward movement.
  • the frame 16 which can optionally be supported during its downward travel by a damping device 52 carried by the intermediate crosspiece 13 , passes from a position A to a position B , shown in broken lines in FIG. 1 .
  • the stroke of the piston rod 15 is chosen so that the punch 51 exerts or not, in position B , a pressure on the loaded pulverulent material.
  • the servo circuit 25 controls the rotation of the motor member 29 until the compaction force detected by the force sensor 46 or the height of packed material measured by the encoder 35 , reaches, respectively, a setpoint value of force F c or height H c , previously chosen and introduced into the circuit 25 .
  • the force set point F c is chosen to be less than a maximum value of force F max not to be exceeded, while the height set point H c is chosen to be greater than the height H min not to be exceeded.
  • the apparatus 17 can be implemented, either only with a force setpoint, or only with a height setpoint, or with a force and height setpoint. In this latter mode of operation, the servo-control circuit 25 controls the stopping of the motor member 29 as soon as one of the set values is reached.
  • the control device 17 thus makes it possible to obtain a precise determined compression ratio over a very wide range of values.
  • control circuit 25 is provided for measuring the residual compaction force, after the exerted compaction force has reached the force reference value, so as to observe its evolution or to control the punch in displacement. the measured compaction force again reaches the force setpoint.
  • control circuit 25 measures, when the height reference value is obtained, the corresponding compaction force, so as to verify that the latter is between maximum F max and minimum F min values. Circuit 25 also assumes this function when the force reference value is reached to verify that the corresponding height is between determined values maximum H max and minimum H min .
  • a calibration is carried out by carrying out two successive height measurements consisting in controlling the motor member, so as to bring the punch into contact with two shims of different and known heights.
  • the difference in shim height is related to the number of pulses delivered by the encoder 35 to determine the pitch of the system.
  • This test which can be carried out when measuring the heights described above, consists in applying the punch to an adjusting shim, with a compaction force greater than the maximum working value, to measure and then to record, in the circuit 25 , the height of displacement of the punch, in relation to the compaction force.
  • the circuit 25 will correct the measured height by a value in relation to the corresponding recorded force.
  • the end part of the sleeve 52 is arranged to receive a support nut 54 which is used more particularly if, during a compaction phase, one or more punches 51 are placed in relation to a case 5 not comprising pulverulent materials to be compacted (position shown on the right in FIG. 4 ).
  • the nuts 54 associated with each punch 51 not compacting powdery materials, come to bear on the plate 9 so as to obtain a distribution of the compressive forces over all of the devices 17 .
  • the vertical position of the nuts 54 is suitably adjusted to allow the punches 51 to descend by a value allowing them to assume the function of compacting the pulverulent materials (position represented on the left in FIG. 4 ).

Abstract

Presses for powdery materials. <??>The apparatus for compressing and controlling the compaction force is characterised in that it comprises: <??>a spindle (24) for control of the compaction force comprising: <??>a screw/nut system (28) driven in rotation by a motive unit (29), <??>a case (43) provided with a force sensor (46), interposed between the screw/nut system and the stamp, <??>and a circuit (25) for automatic control of the motive unit in relation to the successive measured values of the compaction force and to the reference force value. <??>Application to the control of the compression of powdery materials. <IMAGE>

Description

La présente invention est relative au compactage de matières pulvérulentes dans un conteneur et elle vise, plus particulièrement, le compactage des matières pulvérulentes précompactées ou non déversées par doses devant être, successivement, compactées dans des conteneurs en forme d'étuis destinés à constituer des cartouches à effet pyrotechnique, par exemple.The present invention relates to the compacting of pulverulent materials in a container and it relates, more particularly, to the compacting of pre-compacted or non-spilled pulverulent materials in doses which must be successively compacted in containers in the form of cases intended to constitute cartridges. with pyrotechnic effect, for example.

L'invention vise toutes les applications dans lesquelles ou pour lesquelles il convient de tasser, de compacter ou de comprimer des matières pulvérulentes disposées dans des conteneurs.The invention relates to all applications in which or for which it is necessary to compact, compact or compress pulverulent materials placed in containers.

La hauteur de la matière compactée et la pression imposée à la matière constituent deux critères qui jouent un rôle primordial dans le comportement des produits définitifs, lors de leur utilisation ultérieure. Par ailleurs, le non respect de ces critères, à des valeurs déterminées, entraîne parfois l'explosion de ces produits au cours de leur fabrication, provoquant des dommages importants à l'environnement dans lequel ils sont fabriqués.The height of the compacted material and the pressure imposed on the material constitute two criteria which play a primordial role in the behavior of the final products, during their subsequent use. Furthermore, non-compliance with these criteria, at determined values, sometimes leads to the explosion of these products during their manufacture, causing significant damage to the environment in which they are produced.

Pour tenter de déterminer la hauteur de la matière tassée et la pression imposée à la matière, l'art antérieur a proposé, notamment par la demande de brevet EP-A-0 130 958, la mise en oeuvre d'une presse constituée sous la forme d'un châssis vertical portant, à sa partie supérieure, un vérin dont la tige de piston est destinée à commander un poinçon en déplacement vertical. La presse est équipée, en partie inférieure, d'un vérin de retrait conçu pour commander en déplacement une matrice coopérant avec le poinçon. Les vérins de commande et de retrait sont associés à des capteurs de position et à des capteurs de force.In an attempt to determine the height of the packed material and the pressure imposed on the material, the prior art has proposed, in particular by patent application EP-A-0 130 958 , the use of a press constituted under the form of a vertical frame carrying, at its upper part, a cylinder whose piston rod is intended to control a punch in vertical displacement. The press is equipped, in the lower part, with a withdrawal cylinder designed to control the movement of a die cooperating with the punch. The control and withdrawal cylinders are associated with position sensors and force sensors.

Les vérins sont déplacés jusqu'à ce que les valeurs de compactage et/ou de hauteur correspondent à des valeurs respectives de consigne de force et/ou de hauteur. Lorsque les valeurs de consigne de force et/ou de hauteur sont atteintes, les valeurs de compactage et/ou de hauteur sont vérifiées pour s'assurer qu'elles sont comprises entre des valeurs maximales et minimales.The cylinders are moved until the compaction and / or height values correspond to respective values of force and / or height setpoint. When the force and / or height setpoints are reached, the values of compaction and / or height are checked to ensure that they are between maximum and minimum values.

Un inconvénient de la presse décrite ci-dessus réside dans le fait que cette dernière ne permet pas de connaître précisément la hauteur réelle de matière tassée et/ou la pression réelle imposée à la matière. De telles incertitudes sur la hauteur réelle de la matière compactée et sur la pression réelle imposée à la matière ne permettent pas l'obtention de produits définitifs de caractéristiques précises et reproductibles. De plus, une telle presse, de par sa structure, ne permet pas de tenir compte des tolérances mécaniques et de l'élasticité des divers organes la constituant, de sorte que les mesures effectuées sont toujours affectées par des erreurs.A disadvantage of the press described above lies in the fact that the latter does not make it possible to know precisely the actual height of packed material and / or the actual pressure imposed on the material. Such uncertainties about the real height of the compacted material and the real pressure imposed on the material do not allow obtaining final products with precise and reproducible characteristics. In addition, such a press, by its structure, does not allow to take into account the mechanical tolerances and the elasticity of the various organs constituting it, so that the measurements carried out are always affected by errors.

L'objet de l'invention est, justement, de remédier aux inconvénients ci-dessus, en proposant un nouvel appareil de compactage adapté pour connaître précisément la hauteur réelle de matière tassée et/ou la pression réelle imposée à la matière, de manière à agir sur le poinçon pour obtenir la hauteur et/ou la pression désirées.The object of the invention is, precisely, to remedy the above drawbacks, by proposing a new compacting device adapted to precisely know the actual height of packed material and / or the actual pressure imposed on the material, so as to act on the punch to obtain the desired height and / or pressure.

Un autre objet de l'invention est de proposer un appareil de compactage offrant une capacité de réglage aisée et précise des critères de hauteur et de pression, sur des plages de valeurs très larges.Another object of the invention is to propose a compacting device offering a capacity for easy and precise adjustment of the height and pressure criteria, over very wide ranges of values.

Un objet supplémentaire de l'invention est de proposer une presse conçue pour recevoir au moins un appareil de compactage selon l'invention, permettant d'effectuer des opérations de tassement-compression reproductibles et précises pour obtenir, par machine-transfert, la fabrication en grande série de cartouches à caractère pyrotechnique de, sensiblement, mêmes caractéristiques.An additional object of the invention is to provide a press designed to receive at least one compacting device according to the invention, making it possible to perform reproducible and precise compression-compression operations in order to obtain, by machine-transfer, the manufacturing in large series of pyrotechnic cartridges of substantially the same characteristics.

Un objet encore de l'invention est de proposer un procédé permettant de mesurer et de corriger l'élasticité d'un appareil de compactage adapté sur une presse.A further object of the invention is to provide a method for measuring and correcting the elasticity of a suitable compacting device on a press.

Pour atteindre les buts ci-dessus, l'appareil de contrôle de la compression de doses de matières pulvérulentes comprend :
- une broche de contrôle de la force de compactage comportant :
. un système vis-écrou entraîné en rotation par un organe moteur,
. un boîtier muni d'au moins un capteur de force, interposé entre le système vis-écrou et le poinçon et apte à être déplacé en coulissement par le système vis-écrou,
- et un circuit d'asservissement de l'organe moteur en relation avec les valeurs mesurées successives de la force de compactage et avec une valeur de consigne de force.To achieve the above goals, the apparatus for controlling the compression of doses of pulverulent materials comprises:
- a pin for controlling the compaction force comprising:
. a screw-nut system driven in rotation by a drive member,
. a housing provided with at least one force sensor, interposed between the screw-nut system and the punch and able to be moved in sliding by the screw-nut system,
- And a control circuit of the drive member in relation to the successive measured values of the compaction force and with a force reference value.

Le procédé de commande d'un appareil de contrôle de la compression du type consistant à fixer une valeur de consigne de la force de compactage et/ou de la hauteur à atteindre inférieure à une valeur maximale correspondante à ne pas dépasser, et à commander en déplacement le poinçon jusqu'à ce que la force de compactage ou de hauteur mesurée atteigne la valeur de consigne correspondante, est caractérisé en ce qu'il consiste, après que la force de compactage ait atteint la valeur de consigne correspondante :
- à mesurer la force maximale pendant le cycle,
- à mesurer la force résiduelle de compactage pour examiner son évolution.The method of controlling a compression control device of the type consisting in setting a set value of the compaction force and / or of the height to be reached less than a corresponding maximum value not to be exceeded, and to control in displacement of the punch until the compaction or height force measured reaches the corresponding set value, is characterized in that it consists, after the compaction force has reached the corresponding set value:
- to measure the maximum force during the cycle,
- to measure the residual compaction force to examine its evolution.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention.

  • La fig. 1 est une vue générale en élévation d'une presse adaptée pour recevoir un appareil conforme à l'invention, pour le contrôle de la compression de matières pulvérulentes.
  • La fig. 2 est une vue, à plus grande échelle, analogue à la fig. 1.
  • La fig. 3 est un graphique illustrant le procédé de contrôle selon l'invention et montrant l'évolution de hauteur des doses compactées, en relation avec la force de compactage exercée.
  • La fig. 4 représente deux demi-vues en coupe montrant un détail caractéristique de l'invention.
Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments of the subject of the invention.
  • Fig. 1 is a general elevation view of a press adapted to receive an apparatus according to the invention, for controlling the compression of pulverulent materials.
  • Fig. 2 is a view, on a larger scale, similar to FIG. 1 .
  • Fig. 3 is a graph illustrating the control method according to the invention and showing the change in height of the compacted doses, in relation to the compaction force exerted.
  • Fig. 4 shows two half-section views showing a characteristic detail of the invention.

La presse de compactage selon l'invention, telle que représentée aux fig. 1 et 2, est illustrée sous la forme d'un ensemble faisant partie d'une machine-transfert. Une telle machine peut comprendre une structure de base 1 supportant des rails de guidage 2 parallèles entre eux, destinés à assurer le support, le glissement et le guidage de deux organes d'entraînement souples 3, tels que deux chaînes du type Galle, établies en forme de deux boucles sans fin.The compacting press according to the invention, as shown in FIGS. 1 and 2 , is illustrated in the form of an assembly forming part of a transfer machine. Such a machine can comprise a basic structure 1 supporting guide rails 2 parallel to each other, intended to provide support, sliding and guiding of two flexible drive members 3 , such as two chains of the Galle type, established in form of two endless loops.

Les organes d'entraînement 3 sont conçus pour assurer le déplacement de chariots 4 portant des conteneurs, tels que des étuis 5, devant des postes de chargement en produits pulvérulents et/ou des postes de compactage puis, ensuite, vers des postes de garnissage, de fermeture, de déchargement, etc. Cette énumération n'est donnée qu'à titre limitatif car une machine-transfert peut comporter autant qu'il est nécessaire de postes à caractères fonctionnels, multiples, dépendant du produit à fabriquer. La machine-transfert comporte, aussi, des moyens 6 permettant d'immobiliser les chariots 4 à l'aplomb de chaque poste de travail.The drive members 3 are designed to move the carriages 4 carrying containers, such as cases 5 , in front of loading stations for pulverulent products and / or compacting stations and then, then, to packing stations, closing, unloading, etc. This list is given only by way of limitation because a transfer machine can include as many as there are posts with functional, multiple characters, depending on the product to be manufactured. The transfer machine also comprises means 6 making it possible to immobilize the carriages 4 directly above each work station.

Il doit être considéré que l'objet de l'invention peut, également, être réalisé sous la forme d'un poste de travail unitaire simple, sans faire partie d'une machine-transfert.It should be considered that the object of the invention can also be achieved in the form of a single unitary work station, without being part of a transfer machine.

La presse de compactage comprend un bâti 7, en forme de table, supportant la structure de base 1, et un châssis vertical 8 en forme de portique. La table 7 guide en coulissement vertical un plateau 9 apte à être déplacé par un vérin 10 porté par la table et assumant une fonction d'approche rapide ou permettant une grande ouverture de passage. Le plateau 9 supporte au moins une rehausse tubulaire 5a de remplissage et de centrage, destinée à être positionnée dans le prolongement d'un étui 5. Le châssis 8 est constitué par deux montants 11 disposés de part et d'autre du plan de symétrie vertical P-P′ de la presse. Les montants 11 s'élévent verticalement à partir de la table 7 et sont réunis par une traverse supérieure 12 horizontale et par une traverse intermédiaire 13 de protection. La traverse supérieure 12 supporte un vérin principal 14, de préférence du type hydraulique à double effet. Le vérin 14 comporte une tige de piston 15 orientée verticalement et montée solidaire axialement et angulairement d'un cadre vertical 16 assurant le support d'au moins un et, par exemple, deux appareils 17 pour la compression et le contrôle de la force de compactage, disposés de part et d'autre du plan de symétrie P-P′.The compacting press comprises a frame 7 , in the form of a table, supporting the basic structure 1 , and a vertical frame 8 in the form of a gantry. The table 7 guides in vertical sliding a plate 9 able to be moved by a jack 10 carried by the table and assuming a rapid approach function or allowing a large passage opening. The plate 9 supports at least one tubular riser 5 a for filling and centering, intended to be positioned in the extension of a case 5 . The frame 8 is constituted by two uprights 11 arranged on either side of the vertical plane of symmetry PP ′ of the press. The uprights 11 rise vertically from the table 7 and are joined by a horizontal upper cross member 12 and by a cross member protective intermediate 13 . The upper cross member 12 supports a main cylinder 14 , preferably of the double-acting hydraulic type. The cylinder 14 comprises a piston rod 15 oriented vertically and mounted axially and angularly integral with a vertical frame 16 ensuring the support of at least one and, for example, two devices 17 for compression and control of the compaction force , arranged on either side of the plane of symmetry PP ′ .

Le cadre vertical 16 est formé par deux colonnes 18 situées symétriquement par rapport au plan P-P′ et guidées en coulissement vertical par des paliers 19 montés sur la traverse intermédiaire 13. Les colonnes 18 sont réunies par une traverse supérieure 21 horizontale, par une platine centrale 22 disposée en-dessous de la traverse intermédiaire 13 et par une sous-platine 23 dont la fonction sera mieux comprise dans ce qui suit.The vertical frame 16 is formed by two columns 18 located symmetrically with respect to the plane PP ′ and guided in vertical sliding by bearings 19 mounted on the intermediate crosspiece 13 . The columns 18 are joined by a horizontal upper cross member 21 , by a central plate 22 disposed below the intermediate cross member 13 and by a sub-plate 23 whose function will be better understood in the following.

Chaque appareil 17 comprend une broche 24 de contrôle de la force de compactage et un circuit 25 d'asservissement de la broche dont la fonction sera mieux comprise dans ce qui suit.Each device 17 comprises a pin 24 for controlling the compaction force and a circuit 25 for controlling the spindle, the function of which will be better understood in the following.

Tel que cela ressort plus précisément de la fig. 2, la broche de contrôle 24 est constituée par un cylindre tubulaire 26 formé, dans l'exemple illustré, de trois parties 26a-26c . Le cylindre 26 s'élève verticalement, à partir de la platine centrale 22 et passe, de part en part de la traverse intermédiaire 13, par une ouverture 27 ménagée dans cette traverse. Le cylindre 26 est rendu solidaire de la platine centrale 22, de toute manière convenable, et assure le montage d'un système vis-écrou 28 entraîné en rotation par un organe moteur 29.As shown more precisely in FIG. 2 , the control pin 24 is constituted by a tubular cylinder 26 formed, in the example illustrated, of three parts 26 a -26 c . The cylinder 26 rises vertically from the central plate 22 and passes right through the intermediate cross member 13 through an opening 27 formed in this cross member. The cylinder 26 is made integral with the central plate 22 , in any suitable manner, and ensures the mounting of a screw-nut system 28 driven in rotation by a motor member 29 .

Dans l'exemple illustré, le système vis-écrou 28 est constitué par une tige 30 guidée en rotation par des roulements 31 portés par le cylindre et adaptés plus particulièrement pour supporter des charges axiales. La tige 30 est entraînée en rotation par l'organe moteur 29, de préférence de type électrique, dont la vitesse de rotation est commandée par le circuit d'asservissement 25. L'organe moteur 29 est adapté sur une coiffe 32 qui est montée sur la partie terminale 26a supérieure du cylindre. Par exemple, l'organe moteur 29 entraîne en rotation la tige 30 à l'aide d'une transmission 33 à pignons. Bien entendu, il doit être considéré que l'organe moteur 29 peut être monté dans le prolongement axial de la tige 30 ou communiquer son mouvement par une transmission différente de tous types connus en soi.In the example illustrated, the screw-nut system 28 is constituted by a rod 30 guided in rotation by bearings 31 carried by the cylinder and more particularly adapted to support axial loads. The rod 30 is rotated by the motor member 29 , preferably of the electrical type, the speed of rotation of which is controlled by the servo-control circuit 25 . The driving member 29 is fitted to a cap 32 which is mounted on the upper end portion 26 a of the cylinder. For example, the motor member 29 rotates the rod 30 using a pinion transmission 33 . Of course, it must be considered that the drive member 29 can be mounted in the axial extension of the rod 30 or communicate its movement by a different transmission of all types known per se.

De préférence, la partie terminale 30a supérieure de la tige est montée solidaire, par un accouplement direct 34, d'un capteur 35 de position et de déplacement angulaire de la tige 30, formé, par exemple, par un codeur digital adapté sur la coiffe 32. Les informations délivrées par le capteur 35 sont transmises au circuit d'asservissement 25. Il est à noter qu'il pourrait être prévu d'associer le capteur 35 à l'organe moteur 29 en tenant compte, le cas échéant, du rapport de transformation de la transmission 33.Preferably, the terminal portion 30 has upper stem is mounted integral, by a direct coupling 34, a sensor 35 position and angular displacement of the rod 30, formed, for example, by a digital encoder fitted to the cap 32 . The information delivered by the sensor 35 is transmitted to the control circuit 25 . It should be noted that provision could be made to associate the sensor 35 with the drive member 29 , taking account, where appropriate, of the transformation ratio of the transmission 33 .

La tige 30 comporte une partie terminale 30b inférieure destinée à coopérer avec un taraudage 36 d'une bague-écrou 37 qui se trouve liée angulairement au cylindre 26 et guidée en coulissement dans le cylindre. Par exemple, la bague-écrou 37 est liée en rotation au cylindre 26 par des clavettes 38 et se trouve guidée en déplacement axial par une douille 39.The rod 30 has an end portion 30 b of less intended to cooperate with an internal thread 36 of a ring nut 37 which is angularly connected to the cylinder 26 and slidably guided in the cylinder. For example, the nut-ring 37 is linked in rotation to the cylinder 26 by keys 38 and is guided in axial displacement by a bush 39 .

Bien entendu, il pourrait être envisagé d'entraîner en rotation la bague-écrou 37 par l'organe moteur et de lier angulairement la tige 30, de manière à obtenir le coulissement de cette dernière.Of course, it could be envisaged to rotate the nut ring 37 by the drive member and to angularly link the rod 30 , so as to obtain the sliding of the latter.

La bague-écrou 37 comporte, à sa partie terminale, un taraudage 37₁ destinée à recevoir un prolongement fileté 41 qui est fixé à un corps 42 coulissant dans un boîtier 43. La position du corps 42 est réglée verticalement en relation avec le vissage du prolongement 41 dans la bague-écrou 37. Le prolongement 41 comporte un écrou 44 de blocage du corps en position fixe.The nut ring 37 has, at its terminal part, a thread 37₁ intended to receive a threaded extension 41 which is fixed to a body 42 sliding in a housing 43 . The position of the body 42 is adjusted vertically in relation to the screwing of the extension 41 in the ring-nut 37 . The extension 41 includes a nut 44 for locking the body in a fixed position.

Le corps 42 est pourvu d'une collerette supérieure 42₁ destinée à coopérer avec un capteur 45 adapté sur le dessous de la platine centrale 22 assurant le positionnement de fin de course du corps et permettant de déterminer l'initialisation du codeur 35. La collerette 42₁ du corps délimite avec le boîtier 43 un jeu autorisant le coulissement axial du corps 42 dans le boîtier 43. Le corps 42 est muni d'une tête 42₂ sollicitant un capteur de force 46 monté dans le boîtier. Le capteur de force 46, par exemple du type à jauges, est apte à délivrer, au circuit d'asservissement 25, un signal en relation avec les sollicitations en compression auxquelles il est soumis.The body 42 is provided with an upper collar 42₁ intended to cooperate with a sensor 45 adapted on the underside of the central plate 22 ensuring the end-of-travel positioning of the body and making it possible to determine the initialization of the encoder 35 . The collar 42₁ of the body defines with the housing 43 a clearance authorizing the axial sliding of the body 42 in the housing 43 . The body 42 is provided with a head 42₂ requesting a force sensor 46 mounted in the housing. The force sensor 46 , for example of the gauge type, is capable of delivering, to the servo circuit 25 , a signal in relation to the compressive stresses to which it is subjected.

Le capteur de force 46 est destiné à être sollicité en compression par l'intermédiaire d'un pilote cylindrique 48, par un poinçon 51 dont la forme générale est déterminée en fonction de la conformation de l'étui 5 et/ou de l'effet de compression, compactage ou tassement devant être produit ou imposé à la dose ou aux doses de matières pulvérulentes.The force sensor 46 is intended to be stressed in compression by means of a cylindrical pilot 48 , by a punch 51 whose general shape is determined as a function of the conformation of the case 5 and / or the effect compression, compaction or compaction to be produced or imposed on the dose or doses of powdery materials.

Le poinçon 51 est monté dans un fourreau 52 qui est adapté de façon amovible sur le boîtier 43. Le fourreau 52 traverse la sous-platine 23 en étant guidé axialement par une bague 53 montée sur la sous-platine et permettant d'obtenir le positionnement du poinçon 51.The punch 51 is mounted in a sheath 52 which is removably fitted to the housing 43 . The sheath 52 passes through the sub-plate 23 while being guided axially by a ring 53 mounted on the sub-plate and making it possible to obtain the positioning of the punch 51 .

L'appareil de contrôle de la force de compactage, adapté sur une presse et décrit ci-dessus, fonctionne de la manière suivante.The compacting force control apparatus, fitted on a press and described above, operates as follows.

Lorsqu'une dose de matière pulvérulente doit être tassée, comprimée ou compactée à l'intérieur de l'étui 5 dans lequel elle a été déversée par tout moyen convenable, le vérin 14 est alimenté, de manière à provoquer la course d'extension de la tige de piston 15 qui entraîne le cadre 16 dans son déplacement descendant. Le cadre 16, qui peut être éventuellement pris en charge lors de sa course de descente par un dispositif d'amortissement 52 porté par la traverse intermédiaire 13, passe d'une position A à une position B , représentée en trait interrompu à la fig. 1. La course de la tige de piston 15 est choisie de manière que le poinçon 51 exerce ou non, en position B , une pression sur la matière pulvérulente chargée.When a dose of pulverulent material has to be packed, compressed or compacted inside the case 5 into which it has been poured by any suitable means, the jack 14 is supplied, so as to cause the extension stroke of the piston rod 15 which drives the frame 16 in its downward movement. The frame 16 , which can optionally be supported during its downward travel by a damping device 52 carried by the intermediate crosspiece 13 , passes from a position A to a position B , shown in broken lines in FIG. 1 . The stroke of the piston rod 15 is chosen so that the punch 51 exerts or not, in position B , a pressure on the loaded pulverulent material.

Pour obtenir la descente contrôlée du poinçon 51 par l'appareil 17, le circuit d'asservissement 25 commande la rotation de l'organe moteur 29 jusqu'à ce que la force de compactage détectée par le capteur de force 46 ou la hauteur de matière tassée mesurée par le codeur 35, atteigne, respectivement, une valeur de consigne de force F c ou de hauteur H c , préalablement choisies et introduites dans le circuit 25. La consigne de force F c est choisie pour être inférieure à une valeur maximale de force F max à ne pas dépasser, tandis que la consigne de hauteur H c est choisie pour être supérieure à la hauteur H min à ne pas dépasser.To obtain the controlled descent of the punch 51 by the apparatus 17 , the servo circuit 25 controls the rotation of the motor member 29 until the compaction force detected by the force sensor 46 or the height of packed material measured by the encoder 35 , reaches, respectively, a setpoint value of force F c or height H c , previously chosen and introduced into the circuit 25 . The force set point F c is chosen to be less than a maximum value of force F max not to be exceeded, while the height set point H c is chosen to be greater than the height H min not to be exceeded.

Il est à noter que l'appareil 17 peut être mis en oeuvre, soit uniquement avec une consigne de force, soit uniquement avec une consigne de hauteur ou soit avec une consigne de force et de hauteur. Dans ce dernier mode de fonctionnement, le circuit d'asservissement 25 commande l'arrêt de l'organe moteur 29 dès que l'une des valeurs de consigne est atteinte.It should be noted that the apparatus 17 can be implemented, either only with a force setpoint, or only with a height setpoint, or with a force and height setpoint. In this latter mode of operation, the servo-control circuit 25 controls the stopping of the motor member 29 as soon as one of the set values is reached.

L'appareil de contrôle 17 permet, ainsi, d'obtenir un taux de compression déterminé précis sur une plage de valeurs très large.The control device 17 thus makes it possible to obtain a precise determined compression ratio over a very wide range of values.

Par ailleurs, le circuit d'asservissement 25 est prévu pour mesurer la force résiduelle de compactage, après que la force de compactage exercé ait atteint la valeur de consigne de force, de manière à constater son évolution ou à commander en déplacement le poinçon jusqu'à ce que la force de compactage mesurée atteigne de nouveau la valeur de consigne de force.Furthermore, the control circuit 25 is provided for measuring the residual compaction force, after the exerted compaction force has reached the force reference value, so as to observe its evolution or to control the punch in displacement. the measured compaction force again reaches the force setpoint.

Tel que cela apparaît plus précisément à la fig. 3, le circuit d'asservissement 25 mesure, lorsque la valeur de consigne de hauteur est obtenue, la force de compactage correspondante, de manière à vérifier que cette dernière est comprise entre des valeurs maximale F max et minimale F min . Le circuit 25 assume aussi cette fonction lorsque la valeur de consigne de force est atteinte pour vérifier que la hauteur correspondante est comprise entre des valeurs déterminées maximale H max et minimale H min .As shown more precisely in fig. 3 , the control circuit 25 measures, when the height reference value is obtained, the corresponding compaction force, so as to verify that the latter is between maximum F max and minimum F min values. Circuit 25 also assumes this function when the force reference value is reached to verify that the corresponding height is between determined values maximum H max and minimum H min .

Pour rattraper les défauts du système vis-écrou 28, un étalonnage est réalisé en procédant à deux mesures successives de hauteur consistant à commander l'organe moteur, de manière à amener le poinçon en contact avec deux cales de hauteurs différentes et connues. La différence de hauteur des cales est rapportée au nombre d'impulsions délivrées par le codeur 35 pour déterminer le pas du système.To compensate for the defects of the screw-nut system 28 , a calibration is carried out by carrying out two successive height measurements consisting in controlling the motor member, so as to bring the punch into contact with two shims of different and known heights. The difference in shim height is related to the number of pulses delivered by the encoder 35 to determine the pitch of the system.

Pour améliorer la précision des mesures de hauteurs, il peut être envisagé de procéder à un essai permettant de connaître l'élasticité de la broche de contrôle adaptée sur une presse. Cet essai, qui peut être effectué lors de la mesure des hauteurs décrites ci-dessus, consiste à appliquer le poinçon sur une cale de réglage, avec une force de compactage supérieure à la valeur maximale de travail, à mesurer puis à enregistrer, dans le circuit 25, la hauteur de déplacement du poinçon, en relation avec la force de compactage. Lors des mesures de hauteur réalisées au cours du processus de fabrication, le circuit 25 corrigera la hauteur mesurée d'une valeur en relation avec la force enregistrée correspondante.To improve the accuracy of height measurements, it can be envisaged to carry out a test allowing the elasticity of the adapted control spindle to be known on a press. This test, which can be carried out when measuring the heights described above, consists in applying the punch to an adjusting shim, with a compaction force greater than the maximum working value, to measure and then to record, in the circuit 25 , the height of displacement of the punch, in relation to the compaction force. During the height measurements made during the manufacturing process, the circuit 25 will correct the measured height by a value in relation to the corresponding recorded force.

Dans le cas où plusieurs appareils 17 sont mis en oeuvre simultanément sur une même presse, la partie terminale du fourreau 52 est aménagée pour recevoir un écrou d'appui 54 qui est mis en oeuvre plus particulièrement si, lors d'une phase de compactage, un ou plusieurs poinçons 51 se trouvent placés en relation avec un étui 5 ne comportant pas de matières pulvérulentes à compacter (position représentée à droite sur la fig. 4). Dans cette hypothèse, les écrous 54, associés à chaque poinçon 51 ne compactant pas de matières pulvérulentes, viennent en appui sur le plateau 9 de manière à obtenir une répartition des efforts de compression sur l'ensemble des appareils 17. Bien entendu, la position verticale des écrous 54 est réglée convenablement pour autoriser la descente des poinçons 51 d'une valeur leur permettant d'assumer la fonction de compactage des matières pulvérulentes (position représentée à gauche sur la fig. 4).In the case where several devices 17 are used simultaneously on the same press, the end part of the sleeve 52 is arranged to receive a support nut 54 which is used more particularly if, during a compaction phase, one or more punches 51 are placed in relation to a case 5 not comprising pulverulent materials to be compacted (position shown on the right in FIG. 4 ). In this hypothesis, the nuts 54 , associated with each punch 51 not compacting powdery materials, come to bear on the plate 9 so as to obtain a distribution of the compressive forces over all of the devices 17 . Of course, the vertical position of the nuts 54 is suitably adjusted to allow the punches 51 to descend by a value allowing them to assume the function of compacting the pulverulent materials (position represented on the left in FIG. 4 ).

L'invention n'est pas limitée aux exemples décrits et représentés, car diverses modifications peuvent y être apportées sans sortir de son cadre. Ainsi, il peut être envisagé de monter fixement la broche de contrôle 24 et de déplacer en coulissement vertical les conteneurs 5.The invention is not limited to the examples described and shown, since various modifications can be made thereto without departing from its scope. Thus, it can be envisaged to fix the control pin 24 and to move the containers 5 vertically.

Claims (13)

1 - Appareil pour la compression et le contrôle de la force de compactage détectée par un capteur (46) et/ou de hauteur de doses de matières pulvérulentes qui sont compactées dans un conteneur par un poinçon (51),
caractérisé en ce qu'il comprend :
- une broche (24) de contrôle de la force de compactage comportant :
. un système vis-écrou (28) entraîné en rotation par un organe moteur (29),
. un boîtier (43) muni du capteur de force (46), interposé entre le système vis-écrou et le poinçon, et apte à être déplacé en coulissement par le système vis-écrou,
- et un circuit (25) d'asservissement de l'organe moteur en relation avec les valeurs mesurées successives de la force de compactage et avec une valeur de consigne de force. 1 - Apparatus for compression and control of the compaction force detected by a sensor ( 46 ) and / or of the height of doses of pulverulent materials which are compacted in a container by a punch ( 51 ),
characterized in that it comprises:
- a pin ( 24 ) for controlling the compaction force comprising:
. a screw-nut system ( 28 ) driven in rotation by a motor member ( 29 ),
. a housing ( 43 ) provided with the force sensor ( 46 ), interposed between the screw-nut system and the punch, and able to be moved in sliding by the screw-nut system,
- And a circuit ( 25 ) for controlling the drive member in relation to the successive measured values of the compaction force and with a force reference value. 2 - Appareil selon la revendication 1, caractérisé en ce que la broche de contrôle (24) comprend un capteur (35) de position et de déplacement angulaire du système vis-écrou, relié au circuit d'asservissement, de manière que ce dernier pilote l'organe moteur en relation avec une hauteur de consigne. 2 - Apparatus according to claim 1, characterized in that the control pin (24) comprises a sensor ( 35 ) of position and angular displacement of the screw-nut system, connected to the control circuit, so that the latter pilot the drive member in relation to a set height. 3 - Appareil selon la revendication 1 ou 2, caractérisé en ce que la broche de contrôle (24) est formée d'un cylindre tubulaire (26) dans lequel est montée une tige (30) guidée en rotation, entraînée en rotation par l'organe moteur et pourvue d'une partie filetée (30b ) coopérant avec une bague-écrou (37) liée angulairement, guidée en coulissement dans le cylindre et montée solidaire du boîtier. 3 - Apparatus according to claim 1 or 2, characterized in that the control pin ( 24 ) is formed of a tubular cylinder ( 26 ) in which is mounted a rod ( 30 ) guided in rotation, driven in rotation by the motor member and provided with a threaded part ( 30b ) cooperating with an angularly connected nut-ring ( 37 ), guided in sliding in the cylinder and mounted integral with the housing. 4 - Appareil selon l'une des revendications 1 à 3, caractérisé en ce que la broche de contrôle (24) comporte un capteur (45) de positionnement de fin de course du boîtier et de détermination de l'initialisation du capteur (35). 4 - Apparatus according to one of claims 1 to 3, characterized in that the control pin ( 24 ) comprises a sensor ( 45 ) for positioning the end of travel of the housing and for determining the initialization of the sensor ( 35 ) . 5 - Appareil selon la revendication 1 ou 2, caractérisé en ce que l'organe moteur (29) est couplé à la tige filetée par une transmission (33). 5 - Apparatus according to claim 1 or 2, characterized in that the drive member ( 29 ) is coupled to the threaded rod by a transmission ( 33 ). 6 - Appareil selon la revendication 1, caractérisé en ce que l'organe moteur (29) est monté dans le prolongement axial de la tige (30). 6 - Apparatus according to claim 1, characterized in that the drive member ( 29 ) is mounted in the axial extension of the rod ( 30 ). 7 - Presse de compactage du type comportant un châssis vertical (8) s'élevant à partir d'une table (7) et portant un vérin (14) ayant au moins une tige de piston (15) orientée verticalement,
caractérisée en ce qu'elle comporte au moins un appareil conforme à l'une des revendications 1 à 6, dont la broche de contrôle (24) est montée sur un cadre de support (16) et se trouve guidée en coulissement par le châssis (8) et apte à être déplacée par la tige de piston (15). 7 - Compacting press of the type comprising a vertical frame ( 8 ) rising from a table ( 7 ) and carrying a jack ( 14 ) having at least one piston rod ( 15 ) oriented vertically,
characterized in that it comprises at least one device according to one of claims 1 to 6, the control pin ( 24 ) of which is mounted on a support frame ( 16 ) and is guided in sliding by the chassis ( 8 ) and able to be moved by the piston rod ( 15 ). 8 - Presse de compactage selon la revendication 7, caractérisée en ce que le cadre (16) comporte une sous-platine (23) montée entre le corps et le poinçon et équipée d'une bague (53) de guidage axial du fourreau (52) contenant le poinçon. 8 - Compacting press according to claim 7, characterized in that the frame ( 16 ) comprises a sub-plate ( 23 ) mounted between the body and the punch and equipped with a ring ( 53 ) for axial guide of the sleeve ( 52 ) containing the punch. 9 - Presse de compactage selon la revendication 7, caractérisée en ce qu'elle comporte au moins deux appareils équipés chacun d'un écrou d'appui (54) monté sur la partie terminale d'un fourreau (52) d'adaptation du poinçon (51). 9 - Compacting press according to claim 7, characterized in that it comprises at least two devices each equipped with a support nut ( 54 ) mounted on the end part of a sleeve ( 52 ) for adapting the punch ( 51 ). 10 - Presse de compactage selon l'une des revendications 7 à 9, caractérisée en ce que qu'elle comporte une structure de transfert de chariots (4) portant les conteneurs (5), des moyens d'immobilisation (6) des chariots pour positionner les conteneurs à l'aplomb des poinçons et un plateau (9) déplaçable verticalement et supportant au moins une rehausse tubulaire (5a ) de remplissage et de recentrage apte à être positionnée dans le prolongement d'un conteneur (5). 10 - Compacting press according to one of claims 7 to 9, characterized in that it comprises a trolley transfer structure ( 4 ) carrying the containers ( 5 ), immobilization means ( 6 ) of the trolleys for position the containers directly above the punches and a plate ( 9 ) movable vertically and supporting at least one tubular riser ( 5 a ) for filling and refocusing able to be positioned in the extension of a container ( 5 ). 11 - Procédé d'asservissement d'un appareil conforme à l'une des revendications 1 à 6, du type consistant à fixer une valeur de consigne de la force de compactage (F c ) et/ou de la hauteur (H c ) à atteindre inférieure à une valeur maximale correspondante (F max ou H max ) à ne pas dépasser, et à commander en déplacement le poinçon jusqu'à ce que la force de compactage ou de hauteur mesurée atteigne la valeur de consigne correspondante,
caractérisé en ce qu'il consiste, après que la force de compactage ait atteint la valeur de consigne correspondante :
- à mesurer la force maximale pendant le cycle,
- à mesurer la force résiduelle de compactage pour examiner son évolution.
11 - Method for controlling a device according to one of claims 1 to 6, of the type consisting in fixing a set value of the compaction force ( F c ) and / or the height ( H c ) at reach below a corresponding maximum value ( F max or H max ) not to be exceeded, and to be ordered move the punch until the compaction or height force measured reaches the corresponding set value,
characterized in that it consists, after the compaction force has reached the corresponding set value:
- to measure the maximum force during the cycle,
- to measure the residual compaction force to examine its evolution.
12 - Procédé selon la revendication 11, caractérisé en ce qu'il consiste, ensuite, à commander en déplacement le poinçon jusqu'à ce que la force de compactage mesurée atteigne de nouveau la valeur de consigne de force. 12 - A method according to claim 11, characterized in that it consists, then, in controlling the movement of the punch until the measured compaction force again reaches the force reference value. 13 - Procédé selon la revendication 11 ou 12, caractérisé en ce qu'il consiste à :
- appliquer le poinçon sur une cale de réglage avec une force de compactage supérieure à la valeur maximale de travail,
- mesurer et enregistrer la hauteur de déplacement du poinçon, en relation avec la force de compactage exercée,
- et corriger, au cours du processus de fabrication, la hauteur mesurée d'une valeur en relation avec la force enregistrée correspondante pendant l'étalonnage. 13 - Method according to claim 11 or 12, characterized in that it consists in:
- apply the punch to an adjustment shim with a compaction force greater than the maximum working value,
- measure and record the height of movement of the punch, in relation to the compaction force exerted,
- and correct, during the manufacturing process, the measured height by a value in relation to the corresponding recorded force during calibration.
EP89420394A 1988-10-20 1989-10-16 Method and apparatus for compressing and controlling the compression of powdery materials, and press using such a method and apparatus Expired - Lifetime EP0365447B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420394T ATE93768T1 (en) 1988-10-20 1989-10-16 METHOD AND APPARATUS FOR COMPRESSING AND CONTROLLING THE COMPRESSION OF POWDERY MATERIALS AND PRESS FOR USE IN THAT PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8814372A FR2638118A1 (en) 1988-10-20 1988-10-20 METHOD AND APPARATUS FOR COMPRESSION AND CONTROL OF COMPRESSION OF PULVERULENT AND PRESSED MATERIALS BY APPLYING
FR8814372 1988-10-20

Publications (2)

Publication Number Publication Date
EP0365447A1 true EP0365447A1 (en) 1990-04-25
EP0365447B1 EP0365447B1 (en) 1993-09-01

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EP89420394A Expired - Lifetime EP0365447B1 (en) 1988-10-20 1989-10-16 Method and apparatus for compressing and controlling the compression of powdery materials, and press using such a method and apparatus

Country Status (5)

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US (1) US5087398A (en)
EP (1) EP0365447B1 (en)
AT (1) ATE93768T1 (en)
DE (1) DE68908836T2 (en)
FR (1) FR2638118A1 (en)

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* Cited by examiner, † Cited by third party
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Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211964A (en) * 1991-05-20 1993-05-18 Westinghouse Electric Corp. Press machine with means to adjust punching force
USRE35506E (en) * 1991-11-12 1997-05-13 Chemplex Industries, Inc. Powder compacting press apparatus and methods
US5202067A (en) * 1991-11-12 1993-04-13 Chemplex Industries, Inc. Powder compacting press apparatus and methods
US5662849A (en) * 1993-09-10 1997-09-02 Fulsz Technologies Ltd. Method and apparatus for forming compression dosage units within the product package
JP3133899B2 (en) * 1994-07-07 2001-02-13 株式会社三共製作所 Tablet manufacturing method and device
DE19502596C2 (en) * 1995-01-28 1997-08-28 Fette Wilhelm Gmbh Measuring device and computer for checking the tablets of the current production made on a rotary press
DE19717217C2 (en) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Method and device for producing compacts from hard metal, ceramic, sintered metal or the like
US6619088B1 (en) * 2000-10-16 2003-09-16 Aida Engineering Co., Ltd. Bottom dead center correction device for servo press machine
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US6769905B2 (en) 2002-01-04 2004-08-03 S.C. Johnson & Son, Inc. Multilayered compressed candle and method for manufacture
DE102004040939A1 (en) * 2004-08-24 2006-03-02 Hte Ag The High Throughput Experimentation Company Apparatus and method for compacting particles
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DE102008054922A1 (en) * 2008-12-18 2010-06-24 Robert Bosch Gmbh Device for filling and compacting free-flowing products
US8464592B2 (en) * 2009-10-02 2013-06-18 Hitec Luxembourg S.A. Method and apparatus for determining void volume for a particulate material
DE102012019312A1 (en) * 2012-10-01 2014-04-03 Dorst Technologies Gmbh & Co. Kg Method for controlling a ceramic and / or metal powder press or ceramic and / or metal powder press
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RU194147U1 (en) * 2019-09-06 2019-11-29 Павел Александрович Богородецкий DEVICE FOR MANUFACTURING PNEUMETARES FROM PLASTIC BOTTLES FOR EXERCISING FIRING SKILLS AT ATHLETES, HUNTERS AND MILITARY
CN112903523B (en) * 2021-01-27 2022-10-18 武汉裕大华纺织有限公司 Method for adjusting compaction density of dust compactor
CN115597444B (en) * 2022-12-12 2023-03-07 四川航天川南火工技术有限公司 Counter weight pressurizing mechanism, energy-containing powder material press-fitting device and press-fitting equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185500A1 (en) * 1972-05-25 1974-01-04 Philips Nv
EP0130958A1 (en) * 1983-07-01 1985-01-09 Convey Teknik AB Method and apparatus for pressing powder material

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855628A (en) * 1953-08-17 1958-10-14 Benjamin Lassman & Son Pressure bonding system for solid particles
US3255716A (en) * 1962-12-10 1966-06-14 Upjohn Co Measurement of forces within a tableting machine
DE2520662C3 (en) * 1975-05-09 1983-11-03 Wilhelm Fette Gmbh, 2053 Schwarzenbek Device for monitoring the pressing forces of the punches of a tablet press
GB1551954A (en) * 1975-05-28 1979-09-05 Hoffmann La Roche Standardization of a physiochemical parameter of a batch of formulation in tabletted form
US4199539A (en) * 1975-12-16 1980-04-22 General Electric Company Method for monitoring and controlling the operation of a dual platen press
DE2924704A1 (en) * 1979-06-19 1981-01-15 Dorst Keramikmasch DEVICE FOR DETERMINING THE HEIGHT OF PRESSED PARTS ON A PRESS, IN PARTICULAR FOR PRESSING PRESSED PARTS FROM POWDER-BASED INITIAL MATERIAL
US4373889A (en) * 1981-02-13 1983-02-15 Crossley Machine Company, Inc. Hydraulic press assembly
US4450127A (en) * 1982-02-23 1984-05-22 Ptx Pentronix, Inc. Method for compacting powder material with adjustable die and punch assembly
JPS58187223A (en) * 1982-04-23 1983-11-01 Aida Eng Ltd Automatic die height adjusting device of press
US4439129A (en) * 1982-10-26 1984-03-27 Wehr Corporation Hydraulic refractory press including floating upper and lower plunger assemblies
US4570229A (en) * 1983-09-19 1986-02-11 Pennwalt Corporation Tablet press controller and method
FR2570020B1 (en) * 1984-09-11 1988-07-22 Commissariat Energie Atomique AUTOMATIC PRESS
DE3823417A1 (en) * 1988-07-11 1990-01-18 Fette Wilhelm Gmbh METHOD AND DEVICE FOR MONITORING THE PRESSING FORCE OF THE STAMP OF A TABLET PRESS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185500A1 (en) * 1972-05-25 1974-01-04 Philips Nv
EP0130958A1 (en) * 1983-07-01 1985-01-09 Convey Teknik AB Method and apparatus for pressing powder material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no 28 (M-274)[1465], 7 février 1984; & JP-A-58 187 223 (AIDA ENGINEERING K.K.), 1-11-1983 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1782943B1 (en) * 2005-11-02 2014-12-17 Fette GmbH Method and powder press with measurement system for determining a reference in the powder press
EP3942250A4 (en) * 2019-03-19 2022-12-14 True Velocity IP Holdings, LLC Methods and devices metering and compacting explosive powders

Also Published As

Publication number Publication date
US5087398A (en) 1992-02-11
EP0365447B1 (en) 1993-09-01
DE68908836T2 (en) 1994-02-10
ATE93768T1 (en) 1993-09-15
DE68908836D1 (en) 1993-10-07
FR2638118A1 (en) 1990-04-27

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