EP0240425B1 - Method and apparatus for the application of multidirectional vibrations to an elastic support - Google Patents

Method and apparatus for the application of multidirectional vibrations to an elastic support Download PDF

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Publication number
EP0240425B1
EP0240425B1 EP87400703A EP87400703A EP0240425B1 EP 0240425 B1 EP0240425 B1 EP 0240425B1 EP 87400703 A EP87400703 A EP 87400703A EP 87400703 A EP87400703 A EP 87400703A EP 0240425 B1 EP0240425 B1 EP 0240425B1
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EP
European Patent Office
Prior art keywords
vibrations
support
rotation
unidirectional
resilient support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87400703A
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German (de)
French (fr)
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EP0240425A1 (en
Inventor
Roger Brigolle
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Societe Anonime des Machines Osborn SA
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Societe Anonime des Machines Osborn SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18544—Rotary to gyratory

Definitions

  • the invention relates to a method for applying multidirectional vibrations to an elastic support as well as the apparatus designed for implementing this method.
  • Unidirectional vibration generators are known which are designed to apply unidirectional vibrations to an elastic support.
  • Unidirectional vibration generators are known in particular which comprise an eccentric which cooperates with the vibrated elastic mass.
  • multidirectional vibrations must be applied to the support to be vibrated. This is particularly the case in foundries, during sand molding operations where the latter is vibrated to be compacted on the model, when the molding must be of high quality, that is to say when the footprint left in the sand by the model must be very precise.
  • the unidirectional vibrations generally applied to the sand are then not sufficient to ensure effective clamping of the latter on the model according to the different orientations of the faces thereof.
  • the object of the present invention is to remedy this drawback and it provides a method making it possible, from a source of unidirectional vibrations, to apply to an elastic support vibrations which are oriented in multiple directions, as well as an apparatus ensuring the implementation of this process.
  • the source of unidirectional vibrations is given a rotational movement in a plane parallel to that of the elastic support, thereby varying the direction of the vibrations applied to said support.
  • the apparatus for implementing the method comprises a source of unidirectional vibrations cooperating with the elastic support and means which ensure the rotation of the unidirectional vibration generator in a plane parallel to that of the elastic support.
  • GB-A 2,091,377 describes a different vibrating device.
  • the support rotates and is not an elastic support.
  • the vibration generator is in contact with this support by rollers and is fixed in rotation.
  • a generator of the eccentric type is used. which attacks at a determined angle a spherical part mounted in free rotation on the underside of the vibrating table.
  • the vibrating table is fixed in rotation, while the vibration generator is mounted on a support plate designed to rotate around a vertical axis passing through the center of gravity of the table.
  • the molding table receives vibrations oriented in all directions so that the friction of the molding sand particles in the rest state carried by the table is decreased, the evacuation of the air is improved and the sand particles, whatever their shapes, are stored in the smallest volume and become embedded in each other.
  • the compaction thus carried out also makes it possible to obtain better rigidity of the mold.
  • An adjustment in operation of the vibration frequency can be obtained by associating a speed variator with the drive motor of the eccentric of the generator, and an adjustment in operation of the amplitude of the vibrations can be obtained by mounting the eccentric of vibration on a second eccentric relative to which it can rotate, on command, the desired angle to vary the eccentricity of the driving eccentric.
  • Such a variation in amplitude in operation is particularly advantageous for application to molding lines where the molds to vibrate follow one another at regular intervals on the vibrating table.
  • a frame resting on the ground and which supports at its upper part, by means of four vibration springs 2 of vertical axis, a horizontal plate 3 constituting a molding table.
  • the frame 1 carries, by means of a support 4, a horizontal plate 5 which rests on the support 4 by means of rollers 6.
  • the plate 5 is secured to a shaft vertical 7 arranged inside a housing 8 and driven in rotation by a motor 9.
  • the horizontal plate 5 is integral at its front and rear ends with trapezoidal vertical walls 10 each having at its upper end a bearing 12 opposite which is disposed a bearing 13 secured to the upper end of cha that end wall 14 of a cradle 15, articulated to the walls of the plate 5 by horizontal axes 16 passing through the bearings 12, 13.
  • the cradle 15 carries a unidirectional vibration generator as described in FR-A 2 367 542, c ' that is to say comprising a vibration eccentric 17 driven in rotation by a motor 18 and a belt 19 and engaging a spherical element 20 mounted in free rotation on the underside of the molding table 3 in the vicinity of the center of gravity of that -this.
  • the cradle 15 is secured, by its underside, to a rack 21 in the form of an arc of a circle, designed to mesh with a pinion 22 mounted to rotate on a yoke 23 carried by the plate 5.
  • a geared motor group 24 also carried by the plate 5, is designed to drive the pinion 22 in rotation by means of a belt 25.
  • the latter In order to allow adjustment in operation of the amplitude of the vibrations provided by the eccentric 17 the latter, in the manner known by FR-A 2 367 542, is mounted on a control shaft 26 by means of a inner eccentric forming hub.
  • a differential pulley 28 is mounted on the shaft 26 and drives, by a pinion fixed to the planet gear cage, a ring gear carried by the eccentric 17.
  • a stepping brake motor 29 controls the differential pulley to add or subtract a rotational movement chosen at the eccentric 17 in order to offset it relative to the hub 27 by varying the eccentricity.
  • the gear motor 24 is actuated to adjust the angle of attack of the spherical rotating part 20, then the internal eccentric 27 is adjusted so as to cancel the eccentricity of the eccentric of vibration 17.
  • the eccentric 17 is rotated at a speed designed to produce a vibration frequency close to the natural frequency of the table to be vibrated, then by action on the stepping motor step 29, unidirectional vibrations are applied to table 3 by passing the amplitude of these vibrations from zero to the desired value.
  • the rotation of the plate 5 is then produced around the vertical axis XX while ensuring the attack of the spherical part 20 by the eccentric 17 in multiple directions thereby communicating to the molding table 3 the multidirectional vibrations desired.
  • the vibration period of the mold placed on the table 3 is completed, bring back at zero the amplitude of the vibrations by controlling the stepping motor 29 without modifying the operation of the other elements of the device, replace on the table 3 once again immobile the mold vibrated by a new mold, then gradually reduce the amplitude of the vibrations to the desired value without having to restart the various rotating members.
  • the spherical element 20 carried by the underside of the molding table 3 could be fixed and cooperate with the eccentric 17 by means of a needle bearing (not shown).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1. Method of applying multi-directional vibrations to a resilient support, wherein unidirectional vibrations are applied to said support from a source of unidirectional vibrations, characterised in that there is simultaneously impressed on the source of unidirectional vibrations a rotary movement in a plane parallel to that of said support which is fixed in rotation.

Description

L'invention concerne un procédé pour appliquer des vibrations multidirectionnelles à un support élastique ainsi que l'appareillage conçu pour la mise en oeuvre de ce precédé.The invention relates to a method for applying multidirectional vibrations to an elastic support as well as the apparatus designed for implementing this method.

On connaît des générateurs conçus pour appliquer à un support élastique des vibrations unidirectionnelles. On connaît en particulier des générateurs de vibrations unidirectionnelles qui comprennent un excentrique coopérant avec la masse élastique vibrée. Il est cependant des cas où l'utilisation de tels générateurs de vibrations unidirectionnelles n'est pas satisfaisante, car il y a lieu d'appliquer au support à vibrer des vibrations multidirectionnelles. C'est en particulier le cas en fonderie, lors d'opérations de moulage au sable où ce dernier est vibré pour être tassé sur le modèle, lorsque le moulage doit être de grande qualité c'est-à-dire quand l'empreinte laissée dans le sable par le modèle doit être d'une grande précision. Les vibrations unidirectionnelles généralement appliquées au sable ne sont alors pas suffisantes pour assurer un serrage efficace de celui-ci sur le modèle selon les différentes orientations des faces de celui-ci.Generators are known which are designed to apply unidirectional vibrations to an elastic support. Unidirectional vibration generators are known in particular which comprise an eccentric which cooperates with the vibrated elastic mass. There are however cases where the use of such generators of unidirectional vibrations is not satisfactory, since multidirectional vibrations must be applied to the support to be vibrated. This is particularly the case in foundries, during sand molding operations where the latter is vibrated to be compacted on the model, when the molding must be of high quality, that is to say when the footprint left in the sand by the model must be very precise. The unidirectional vibrations generally applied to the sand are then not sufficient to ensure effective clamping of the latter on the model according to the different orientations of the faces thereof.

La présente invention a pour objet de remédier à cet inconvénient et elle propose un procédé permettant, à partir d'une source de vibrations unidirectionnelles, d'appliquer à un support élastique des vibrations qui soient orientées dans des directions multiples, ainsi qu'un appareillage assurant la mise en oeuvre de ce procédé.The object of the present invention is to remedy this drawback and it provides a method making it possible, from a source of unidirectional vibrations, to apply to an elastic support vibrations which are oriented in multiple directions, as well as an apparatus ensuring the implementation of this process.

Selon le procédé de l'invention, on imprime à la source de vibrations unidirectionnelles un mouvement de rotation dans un plan parallèle à celui du support élastique, en faisant ainsi varier la direction des vibrations appliquées audit support.According to the method of the invention, the source of unidirectional vibrations is given a rotational movement in a plane parallel to that of the elastic support, thereby varying the direction of the vibrations applied to said support.

L'appareillage pour la mise en oeuvre du procédé comprend une source de vibrations unidirectionnelles coopérant avec le support élastique et des moyens qui assurent la rotation du générateur de vibrations unidirectionnelles dans un plan parallèle à celui du support élastique.The apparatus for implementing the method comprises a source of unidirectional vibrations cooperating with the elastic support and means which ensure the rotation of the unidirectional vibration generator in a plane parallel to that of the elastic support.

GB-A 2 091 377 décrit un appareil vibrant différent. Le support tourne et n'est pas un support élastique. Le générateur de vibrations est en contact avec ce support par des galets et est fixe en rotation.GB-A 2,091,377 describes a different vibrating device. The support rotates and is not an elastic support. The vibration generator is in contact with this support by rollers and is fixed in rotation.

Selon une forme d'exécution de l'appareillage de l'invention, particulièrement utilisable dans le cas d'application de vibrations multidirectionnelles à une table de travail d'une installation de moulage au sable en fonderie, on utilise un générateur du type à excentrique qui attaque selon un angle déterminé une pièce sphérique montée en rotation libre sur la face inférieure de la table vibrante. La table vibrante est fixe en rotation, alors que le générateur de vibrations est monté sur un plateau de support conçu pour tourner autour d'un axe vertical passant par le centre de gravité de la table. On comprendra ainsi qu'au cours de la rotation du plateau de support, la table de moulage reçoit des vibrations orientées dans toutes les directions de sorte que le frottement des particules de sable de moulage à l'état de repos portées par la table se trouve diminué, l'évacuation de l'air se trouve améliorée et les particules de sable, quelles que soient leurs formes, se rangent dans le volume le plus petit et s'incrustent les unes dans les autres. Le compactage ainsi réalisé permet d'obtenir de plus une meilleure rigidité du moule.According to one embodiment of the apparatus of the invention, particularly usable in the case of application of multidirectional vibrations to a work table of a foundry sand molding installation, a generator of the eccentric type is used. which attacks at a determined angle a spherical part mounted in free rotation on the underside of the vibrating table. The vibrating table is fixed in rotation, while the vibration generator is mounted on a support plate designed to rotate around a vertical axis passing through the center of gravity of the table. It will thus be understood that during the rotation of the support plate, the molding table receives vibrations oriented in all directions so that the friction of the molding sand particles in the rest state carried by the table is decreased, the evacuation of the air is improved and the sand particles, whatever their shapes, are stored in the smallest volume and become embedded in each other. The compaction thus carried out also makes it possible to obtain better rigidity of the mold.

On peut avantageusement prévoir de disposer, entre la partie d'attaque à excentrique du générateur de vibrations et le plateau tournant de support, un dispositif par exemple à crémaillère permettant d'obtenir une rotation désirée du générateur de vibrations dans un plan vertical pour faire varier l'angle d'attaque de la table vibrante. Un réglage en fonctionnement de la fréquence des vibrations peut être obtenu en associant un variateur de vitesse au moteur d'entraînement de l'excentrique du générateur, et un réglage en fonctionnement de l'amplitude des vibrations pourra être obtenu en montant l'excentrique de vibration sur un second excentrique par rapport auquel il peut tourner, sur commande, de l'angle désiré pour faire varier l'excentricité de l'excentrique d'attaque. Une telle variation d'amplitude en fonctionnement est particulièrement avantageuse pour l'application à des chaînes de moulage où les moules à vibrer se succèdent à intervalles réguliers sur la table vibrante. Il est alors possible, sans arrêter le moteur d'entraînement du générateur de vibrations, c'est-à-dire en gardant les conditions les plus favorables (vibrations au voisinage de la fréquence propre du système vibré), d'immobiliser le moule vibré par annulation de l'amplitude des vibrations et de le remplacer par le moule suivant à vibrer, puis par retour à l'amplitude désirée d'appliquer les vibrations multidirectionnelles à ce moule suivant sans perte d'énergie.Advantageously, provision can be made to have, between the eccentric driving part of the vibration generator and the support turntable, a device for example a rack making it possible to obtain a desired rotation of the vibration generator in a vertical plane in order to vary the angle of attack of the vibrating table. An adjustment in operation of the vibration frequency can be obtained by associating a speed variator with the drive motor of the eccentric of the generator, and an adjustment in operation of the amplitude of the vibrations can be obtained by mounting the eccentric of vibration on a second eccentric relative to which it can rotate, on command, the desired angle to vary the eccentricity of the driving eccentric. Such a variation in amplitude in operation is particularly advantageous for application to molding lines where the molds to vibrate follow one another at regular intervals on the vibrating table. It is then possible, without stopping the drive motor of the vibration generator, that is to say by keeping the most favorable conditions (vibrations near the natural frequency of the vibrated system), to immobilize the vibrated mold by canceling the amplitude of the vibrations and replacing it with the next mold to be vibrated, then by returning to the desired amplitude to apply multidirectional vibrations to this next mold without loss of energy.

Pour bien faire comprendre le procédé selon l'invention et l'appareillage conçu pour sa mise-en- oeuvre, on décrira ci-après une forme d'exécution préférée de cet appareillage en référence au dessin schématique annexé dans lequel :

  • la figure 1 est une vue de face, partiellement en coupe verticale, d'un appareillage pour l'application de vibrations multidirectionnelles à une table vibrante, par exemple une table de moulage ; et
  • la figure 2 est une vue de profil, partiellement en coupe verticale, de l'appareillage de la figure 1.
To clearly understand the process according to the invention and the apparatus designed for its implementation, a preferred embodiment of this apparatus will be described below with reference to the appended schematic drawing in which:
  • Figure 1 is a front view, partially in vertical section, of an apparatus for applying multidirectional vibrations to a vibrating table, for example a molding table; and
  • FIG. 2 is a side view, partially in vertical section, of the apparatus of FIG. 1.

En référence au dessin, on a représenté en 1 un bâti reposant sur le sol et qui supporte à sa partie supérieure, par l'intermédiaire de quatre ressorts de vibration 2 d'axe vertical, un plateau horizontal 3 constituant une table de moulage. A sa partie inférieure le bâti 1 porte, par l'intermédiaire d'un support 4, un plateau horizontal 5 qui repose sur le support 4 par l'intermédiaire de galets 6. En son centre, le plateau 5 est solidaire d'un arbre vertical 7 disposé à l'intérieur d'un logement 8 et entraîné en rotation par un moteur 9.Referring to the drawing, there is shown in 1 a frame resting on the ground and which supports at its upper part, by means of four vibration springs 2 of vertical axis, a horizontal plate 3 constituting a molding table. At its lower part, the frame 1 carries, by means of a support 4, a horizontal plate 5 which rests on the support 4 by means of rollers 6. In its center, the plate 5 is secured to a shaft vertical 7 arranged inside a housing 8 and driven in rotation by a motor 9.

Le plateau horizontal 5 est solidaire à ses extrémités avant et arrière de parois verticales trapézoïdales 10 présentant chacune à son extrémité supérieure un palier 12 en regard duquel est disposé un palier 13 solidaire de l'extrémité supérieure de chaque paroi extrême 14 d'un berceau 15, articulé aux parois du plateau 5 par des axes horizontaux 16 traversant les paliers 12, 13. Le berceau 15 porte un générateur de vibrations unidirectionnelles tel que décrit dans FR-A 2 367 542, c'est-à-dire comprenant un excentrique de vibration 17 entraîné en rotation par un moteur 18 et une courroie 19 et engageant un élément sphérique 20 monté en rotation libre sur la face inférieure de la table de moulage 3 au voisinage du centre de gravité de celle-ci.The horizontal plate 5 is integral at its front and rear ends with trapezoidal vertical walls 10 each having at its upper end a bearing 12 opposite which is disposed a bearing 13 secured to the upper end of cha that end wall 14 of a cradle 15, articulated to the walls of the plate 5 by horizontal axes 16 passing through the bearings 12, 13. The cradle 15 carries a unidirectional vibration generator as described in FR-A 2 367 542, c ' that is to say comprising a vibration eccentric 17 driven in rotation by a motor 18 and a belt 19 and engaging a spherical element 20 mounted in free rotation on the underside of the molding table 3 in the vicinity of the center of gravity of that -this.

Le berceau 15 est solidaire, par sa face inférieure, d'une crémaillère 21 en forme d'arc de cercle, conçue pour engrener avec un pignon 22 monté pour tourner sur une chape 23 portée par le plateau 5. Un groupe moto-réducteur 24, également porté par le plateau 5, est conçu pour entraîner en rotation le pignon 22 par l'intermédiaire d'une courroie 25. Par rotation du pignon 22, on règle l'inclinaison du berceau 15 autour des axes 16 et donc l'angle d'attaque de la partie sphérique 20 par l'excentrique de vibration 17.The cradle 15 is secured, by its underside, to a rack 21 in the form of an arc of a circle, designed to mesh with a pinion 22 mounted to rotate on a yoke 23 carried by the plate 5. A geared motor group 24 , also carried by the plate 5, is designed to drive the pinion 22 in rotation by means of a belt 25. By rotation of the pinion 22, the inclination of the cradle 15 is adjusted around the axes 16 and therefore the angle of attack of the spherical part 20 by the eccentric of vibration 17.

Afin de permettre le réglage en fonctionnement de l'amplitude des vibrations fournies par l'excentrique 17 celui-ci, de la façon connue par FR-A 2 367 542, est monté sur un arbre de commande 26 par l'intermédiaire d'un excentrique intérieur formant moyeu. Une poulie différentielle 28 est montée sur l'arbre 26 et entraîne, par un pignon fixé à la cage du planétaire, une couronne dentée portée par l'excentrique 17. Un moteur frein pas à pas 29 commande la poulie différentielle pour ajouter ou retrancher un mouvement de rotation choisi à l'excentrique 17 afin de décaler celui-ci par rapport au moyeu 27 en faisant varier l'excentricité.In order to allow adjustment in operation of the amplitude of the vibrations provided by the eccentric 17 the latter, in the manner known by FR-A 2 367 542, is mounted on a control shaft 26 by means of a inner eccentric forming hub. A differential pulley 28 is mounted on the shaft 26 and drives, by a pinion fixed to the planet gear cage, a ring gear carried by the eccentric 17. A stepping brake motor 29 controls the differential pulley to add or subtract a rotational movement chosen at the eccentric 17 in order to offset it relative to the hub 27 by varying the eccentricity.

Le fonctionnement de l'appareillage se comprend immédiatement d'après la description qui précède. Le dispositif étant dans la position de la figure 1, on actionne le moto-réducteur 24 pour règler l'angle d'attaque de la partie tournante sphérique 20, puis on règle l'excentrique intérieur 27 de façon à annuler l'excentricité de l'excentrique de vibration 17. Par le moteur 18, on entraîne en rotation l'excentrique 17 à une vitesse conçue pour produire une fréquence de vibration proche de la fréquence propre de la table à vibrer, puis par action sur le moteur pas-à-pas 29 on applique à la table 3 des vibrations unidirectionnelles en faisant passer l'amplitude de ces vibrations de zéro à la valeur désirée. Par commande du moteur 9, on produit alors la rotation du plateau 5 autour de l'axe vertical X-X en assurant l'attaque de la partie sphérique 20 par l'excentrique 17 selon des directions multiples en communiquant ainsi à la table de moulage 3 les vibrations multidirectionnelles souhaitées. Dans le cas d'une chaîne de moulage, où les moules à tasser passent successivement sur la même table de moulage à des intervalles de temps déterminés, on peut avantageusement, lorsque la période de vibration du moule disposé sur la table 3 est achevée, ramener à zéro l'amplitude des vibrations par commande du moteur pas-à-pas 29 sans modifier le fonctionnement des autres éléments du dispositif, remplacer sur la table 3 redevenue immobile le moule vibré par un nouveau moule, puis ramener progressivement l'amplitude des vibrations à la valeur désirée sans avoir à relancer les divers organes tournants.The operation of the apparatus is immediately understood from the foregoing description. The device being in the position of FIG. 1, the gear motor 24 is actuated to adjust the angle of attack of the spherical rotating part 20, then the internal eccentric 27 is adjusted so as to cancel the eccentricity of the eccentric of vibration 17. By the motor 18, the eccentric 17 is rotated at a speed designed to produce a vibration frequency close to the natural frequency of the table to be vibrated, then by action on the stepping motor step 29, unidirectional vibrations are applied to table 3 by passing the amplitude of these vibrations from zero to the desired value. By controlling the motor 9, the rotation of the plate 5 is then produced around the vertical axis XX while ensuring the attack of the spherical part 20 by the eccentric 17 in multiple directions thereby communicating to the molding table 3 the multidirectional vibrations desired. In the case of a molding line, where the tamping molds pass successively on the same molding table at determined time intervals, it is advantageously possible, when the vibration period of the mold placed on the table 3 is completed, bring back at zero the amplitude of the vibrations by controlling the stepping motor 29 without modifying the operation of the other elements of the device, replace on the table 3 once again immobile the mold vibrated by a new mold, then gradually reduce the amplitude of the vibrations to the desired value without having to restart the various rotating members.

En variante, l'élément sphérique 20 porté par la face inférieure de la table de moulage 3 pourrait être fixe et coopérer avec l'excentrique 17 par l'intermédiaire d'un roulement à aiguilles (non représenté).Alternatively, the spherical element 20 carried by the underside of the molding table 3 could be fixed and cooperate with the eccentric 17 by means of a needle bearing (not shown).

On comprendra que la présente description a été donnée à simple titre d'exemple, sans caractère limitatif, et que des adjonctions ou des modifications constructives pourraient y être apportées sans sortir du cadre de l'invention définie par les revendications qui suivent. En particulier, on a décrit l'appareillage de l'invention comme concernant l'application de vibrations multidirectionnelles à des tables de moulage, mais l'invention pourrait concerner l'application de vibrations multidirectionnelles à d'autres types de supports élastiques à vibrer.It will be understood that the present description has been given by way of example, without limitation, and that additions or constructive modifications could be made without departing from the scope of the invention defined by the claims which follow. In particular, the apparatus of the invention has been described as relating to the application of multidirectional vibrations to molding tables, but the invention could relate to the application of multidirectional vibrations to other types of elastic supports to be vibrated.

Claims (5)

1. Method of applying multi-directional vibrations to a resilient support, wherein unidirectional vibrations are applied to said support from a source of unidirectional vibrations, characterised in that there is simultaneously impressed on the source of unidirectional vibrations a rotary movement in a plane parallel to that of said support which is fixed in rotation.
2. Device for putting into practice the method according to Claim 1, characterised in comprising a source of unidirectional vibrations, a member connected to the resilient support to be vibrated and adapted to cooperate with an active element of the vibration generator, and means ensuring rotation of the vibration generator in a plane parallel to that of the resilient support which is fixed in rotation.
3. Device as in Claim 2, characterised in that the resilient support (3) is fixed in rotation, while the vibration generator is carried by a plate (5) which is parallel to said resilient support (3) and which is driven to rotate about an axis perpendicular to itself.
4. Device as in Claim 3, characterised in that the generator of unidirectional vibrations comprises a vibrating eccentric (17) which is rotatably driven and cooperates with a revolution body (20) of spherical shape, mounted on the lower face of the resilient support (3) fixed in rotation.
5. Device as in Claim 4, characterised in that the generator of unidirectional vibrations is suspended from its rotating support plate (5), with the interposition of means permitting variation of its inclination in a plane perpendicular to the resilient support (3) and thus varying the angle of attack of the vibrations.
EP87400703A 1986-04-02 1987-03-31 Method and apparatus for the application of multidirectional vibrations to an elastic support Expired - Lifetime EP0240425B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8604681 1986-04-02
FR8604681A FR2596677B1 (en) 1986-04-02 1986-04-02 METHOD FOR APPLYING MULTIDIRECTIONAL VIBRATIONS TO AN ELASTIC SUPPORT, AND APPARATUS FOR CARRYING OUT SAID METHOD

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Publication Number Publication Date
EP0240425A1 EP0240425A1 (en) 1987-10-07
EP0240425B1 true EP0240425B1 (en) 1990-09-05

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EP87400703A Expired - Lifetime EP0240425B1 (en) 1986-04-02 1987-03-31 Method and apparatus for the application of multidirectional vibrations to an elastic support

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US (1) US4929087A (en)
EP (1) EP0240425B1 (en)
DE (1) DE3764688D1 (en)
ES (1) ES2018278B3 (en)
FR (1) FR2596677B1 (en)

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US5067549A (en) * 1989-12-04 1991-11-26 General Kinematics Corporation Compaction apparatus and process for compacting sand
US5172599A (en) * 1991-05-15 1992-12-22 Woltering Howard M Vibratory device
DE9307761U1 (en) * 1993-05-22 1993-08-19 Kuston (Deutschland) GmbH, 47533 Kleve Mixer with a vibratory drive
DE9312016U1 (en) * 1993-08-12 1993-10-21 Berger, Hans-Werner, 22941 Jersbek Device for mixing, shaking, stirring and / or emulsifying liquids
US5988869A (en) * 1998-07-29 1999-11-23 Pharmacopeia, Inc. Agitator for orbital agitation
US20040109385A1 (en) * 2002-08-05 2004-06-10 Integrated Biosystems, Inc. Systems and methods for thawing, mixing, and processing biopharmaceutical materials
DE102005009095A1 (en) * 2005-02-22 2006-08-31 Institut für Fertigteiltechnik und Fertigbau Weimar e.V. Device for generation of three-dimensional oscillations in rigid vibration table has six unbalanced shafts whereby each of two counter rotating unbalanced shafts of oriented exciter represents one coordinate axis
US20070258850A1 (en) * 2006-05-08 2007-11-08 Miller Leonce J Iii Heat Transfer System for Retorts and Method Therefore
US8394335B2 (en) * 2009-03-06 2013-03-12 Allpax Products Llc Drive train for agitation of products in batch retorts and related retort system
WO2013022815A1 (en) 2011-08-10 2013-02-14 Allpax Products Llc Retort with progressive latch, roller support arrangement and method and system for reciprocation of loads
CN102529505B (en) * 2011-12-29 2014-05-07 贝发集团股份有限公司 Vibrating machine used for uniformly filling granular ornaments

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Also Published As

Publication number Publication date
US4929087A (en) 1990-05-29
DE3764688D1 (en) 1990-10-11
FR2596677B1 (en) 1990-04-27
FR2596677A1 (en) 1987-10-09
EP0240425A1 (en) 1987-10-07
ES2018278B3 (en) 1991-04-01

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