EP0012675A1 - Apparatus for moulding concrete bodies - Google Patents

Apparatus for moulding concrete bodies Download PDF

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Publication number
EP0012675A1
EP0012675A1 EP19790400978 EP79400978A EP0012675A1 EP 0012675 A1 EP0012675 A1 EP 0012675A1 EP 19790400978 EP19790400978 EP 19790400978 EP 79400978 A EP79400978 A EP 79400978A EP 0012675 A1 EP0012675 A1 EP 0012675A1
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EP
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Prior art keywords
mold
concrete
vibrating
installation
molding
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EP19790400978
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German (de)
French (fr)
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EP0012675B1 (en
Inventor
Michel Gravier
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TUYAUX BONNA Ste
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TUYAUX BONNA Ste
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    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/14—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material
    • B28B21/16—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material one or more mould elements

Definitions

  • the present invention relates to a method and an installation for molding concrete products.
  • the invention relates more particularly to the molding of concrete pipes.
  • the vibration phase of concrete makes it possible not only to facilitate the placement of dry concrete inside the molds, but also and above all to improve the compactness of the molded concrete, in particular by expelling the air included therein.
  • the vibration phase is therefore an essential phase in the product molding operation. Its speed depends on the productivity of the entire production line and its efficiency depends on the quality of the products obtained.
  • the vibration of the concrete is obtained either internally using needle actuators embedded in the concrete, or externally using vibrating tables used essentially for small dimensions, or using external vibrators fixed on the mold wall and producing vibrations by means of eccentric rotating weights.
  • the action in depth in the concrete of these vibrators is generally quite limited.
  • At least one of the two amplitude and frequency parameters of the vibration is not adjustable, which leads to lengthening the time of the vibration operation to obtain an acceptable quality of the product, this being particularly sensitive with the external vibrators vibrating in an anarchic manner and generating quite different vibrations at various points of the molds.
  • the vibrators currently used are very noisy and make working conditions particularly difficult.
  • the invention therefore essentially aims to provide a method and an installation for molding vibrated concrete products which allow to standardize the vibrations at all points of the mass of the concrete, this standardization of the vibrations leading to a better compactness and greater homogeneity of the molded products.
  • the solution proposed according to invention consists in shaking the mold and the concrete which it contains so that by shaking the assembly, all the points of the mold are animated by the same movement simultaneously and consequently subjected to unidirectional vibrations and perfectly identical in all concrete mass points.
  • the method of molding concrete products such as pipes consists essentially of filling a mold with concrete corresponding to the product to be molded and of agitating in a block the assembly constituted by the mold and the concrete which it contains.
  • the stirring operation is started during the filling of the mold.
  • the molding installation for implementing the method comprises, in known manner a concrete mold and means for vibrating the concrete, said installation further comprising a reaction mass and supports on which the mold rests freely, the means for vibrating the concrete being vibrating hydraulic cylinders which are interposed between the reaction mass and the mold against which they rest.
  • the supports on which the mold rests freely can be constituted by suspension means attached to a lifting device or even horizontal cradles resting on the ground.
  • the installation shown is an installation for molding cylindrical concrete pipes.
  • This installation comprises a cylindrical mold 1 suspended vertically by means of tie rods 2 from a support 3 attached to a conventional lifting device such as a traveling crane or a crane not shown.
  • the installation further comprises a reaction mass 4, for example of reinforced concrete, supporting at its upper part a mobile carriage 5 carrying an arm 6 which extends above the mold 1 and carries at its end a cover. closure 7 which covers the upper part of the mold and serves to introduce the concrete into the latter via a supply duct 8 also carried by the arm 6.
  • a reaction mass 4 for example of reinforced concrete, supporting at its upper part a mobile carriage 5 carrying an arm 6 which extends above the mold 1 and carries at its end a cover. closure 7 which covers the upper part of the mold and serves to introduce the concrete into the latter via a supply duct 8 also carried by the arm 6.
  • Gussets 9 and 10 are attached to the lower part and to the upper part of the outer cylindrical casing of the mold 1, intended to allow the attachment, by means of quick couplers, 11 and 12, respectively.
  • cylinders 13 and 14 whose bodies are supported and are fixed to the reaction mass 4.
  • the jacks 13 and 14 ensuring the junction between the reaction mass 4 and the mold mounted floating under the support 3 are hydraulic vibrating jacks supplied in synchronism by a hydraulic unit not shown.
  • the amplitude and frequency of their vibrations are adjustable independently of one another by acting in a known manner on the flow rate and on the pressure of the supply fluid.
  • the synchronized tremors generated by the two cylinders 13 and 14 cause the phase vibration of the mold 1 and of the filling concrete it contains, the whole vibrating unit.
  • This result can be obtained, on the one hand, thanks to the fact that the mold 1 is suspended floating under the support 3, which allows it to vibrate freely, and thanks to the fact that the vibrations are generated and maintained by hydraulic vibrating jacks capable of developing considerable efforts during very short time intervals in the form of rapid pulses.
  • the entire mass of concrete introduced into the mold is thus shaken in depth, which contributes to its compaction at the bottom of the mold and to obtaining a high and homogeneous compactness in all points of the molded product.
  • the vibration parameters are substantially identical in all points of the mold, which leads to the production of better quality, homogeneous and reproducible products.
  • the arm 6 carrying the cover 7 is then advanced so that the said cover covers the upper open end of the mold 1.
  • the concrete is then sent via the conduit 8 which opens into the cover 7 and the operation is started.
  • vibrating jacks 13 and 14 so that they agitate the mold 1 in phase during its filling.
  • the rods of the two vibrating jacks 13 and 14 are detached from the gussets 9 and 10 of the mold, while the cover 7 is lifted by the arm 6 which disappears towards the rear so as to release the mold 1 which is removed while a new empty mold takes its place.
  • the invention makes it possible to improve working conditions by the fact that the noise level is considerably reduced and that the adjustments are facilitated.
  • the mold is arranged vertically and suspended under a support hung on a bridge or a crane, but obviously the mold can also be arranged horizontally and simply placed on cradles leaving it all freedom to vibrate, the vibrating jacks then taking support on the one hand on the ground and on the other hand under the mold which they make jump in synchronism.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

1. Moulding apparatus comprising a concrete mould (1), means for vibrating the concrete and supports for the mould on which it rests freely, characterized in that it comprises a reaction body (4), in that the means for vibrating the concrete are vibrating hydraulic jacks (13, 14) the amplitude and frequency of their vibrations being ajustable independently of one another, and in that the said jacks are interposed between the reaction body (4) and the mould (1) against which they bear.

Description

Procédé et installation de moulage de produits en bétonMethod and installation for molding concrete products

La présente invention concerne un procédé et une installation de moulage de produits en béton.The present invention relates to a method and an installation for molding concrete products.

L'invention concerne plus particulièrement le moulage de tuyaux en béton.The invention relates more particularly to the molding of concrete pipes.

On connaît l'importance de la phase de vibration du béton dans l'opération de moulage de produits en béton tels que des tuyaux. La vibration du béton permet non seulement de faciliter la mise en place des bétons secs à l'intérieur des moules, mais également et surtout d'améliorer la compacité du béton moulé,notamment en expulsant l'air compris dans celui-ci. La phase de vibration est donc une phase essentielle dans l'opération de moulage du produit. De sa rapidité dépend la productivité de toute la ligne de fabrication et de son efficacité dépend la qualité des produits obtenus.We know the importance of the vibration phase of concrete in the molding operation of concrete products such as pipes. The vibration of the concrete makes it possible not only to facilitate the placement of dry concrete inside the molds, but also and above all to improve the compactness of the molded concrete, in particular by expelling the air included therein. The vibration phase is therefore an essential phase in the product molding operation. Its speed depends on the productivity of the entire production line and its efficiency depends on the quality of the products obtained.

Or, on sait qu'il existe une relation entre la qualité du produit en béton vibré et la fréquence,l'amplitude et le temps de vibration dudit produit au cours du moulage. En particulier, la fréquence des vibrations doit être adaptée à la granulométrie du béton moulé. En outre,il importe que le produit moulé en béton soit vibré "à coeur" et non pas superficiellement,de telle sorte que la compacité du béton soit sensiblement la même dans toute la masse moulée.However, it is known that there is a relationship between the quality of the vibrated concrete product and the frequency, amplitude and time of vibration of said product during molding. In particular, the frequency of the vibrations must be adapted to the particle size of molded concrete. In addition, it is important that the concrete molded product is vibrated "to the core" and not superficially, so that the compactness of the concrete is substantially the same throughout the molded mass.

Pour obtenir le meilleur résultat dans le temps le plus court possible,il est donc primordial de pouvoir régler,en fonction de la composition du béton,à la fois l'amplitude et la fréquence des vibrations,et ceci de manière indépendante.To obtain the best result in the shortest possible time, it is therefore essential to be able to adjust, depending on the composition of the concrete, both the amplitude and the frequency of the vibrations, and this independently.

Or, par les méthodes connues et utilisées actuellement,la vibration du béton est obtenue soit de manière interne à l'aide de pervibrateurs à aiguilles noyés dans le béton, soit de manière externe à l'aide de tables vibrantes utilisées essentiellement pour des produits de petites dimensions, ou à l'aide de vibrateurs externes fixés sur la paroi du moule et produisant les vibrations au moyen de masselottes tournantes excentrées. L'action en profondeur dans le béton de ces vibrateurs est généralement assez limiée.However, by the methods known and currently used, the vibration of the concrete is obtained either internally using needle actuators embedded in the concrete, or externally using vibrating tables used essentially for small dimensions, or using external vibrators fixed on the mold wall and producing vibrations by means of eccentric rotating weights. The action in depth in the concrete of these vibrators is generally quite limited.

L'état de la technique dans ce domaine particulier est illustré notamment dans le brevet des Etats-Unis n°3.584.356 qui divulgue une installation où le vibrage du béton est obtenu à l'aide de vibrateurs fixés à la partie inférieure et à la partie supérieure du moule. Avec ces vibrateurs, il est impossible de vibrer uniformément la totalité du béton contenu dans le moule,d'autant plus que ledit moule n'est pas libre latéralement mais retenu par des traverses,ce qui amortit localement les vibrations . De même,dans l'installation décrite dans le brevet français 1.138.855,un vibrateur est fixé sur la paroi extérieure du moule;aussi ,dans ces conditions il est hors de question de pouvoir vibrer uniformément la masse de béton contenue dans le moule,et seule la zone près de laquelle se trouve le vibrateur sera soumise à des vibrations d'intensité suffisante,tandis que toute zone éloignée de l'emplacement du vibrateur ne recevra que des vibrations fortement atténuées,ce qui entraîne une hétérogénéité de la compacité du béton, et ceci d'autant plus que le tuyau et le moule sont plus longs.The state of the art in this particular field is illustrated in particular in United States patent No. 3,584,356 which discloses an installation where the vibration of the concrete is obtained using vibrators fixed to the lower part and to the upper part of the mold. With these vibrators, it is impossible to uniformly vibrate all of the concrete contained in the mold, especially since said mold is not free laterally but retained by crosspieces, which locally dampens vibrations. Similarly, in the installation described in French patent 1,138,855, a vibrator is fixed to the external wall of the mold; therefore, under these conditions, it is out of the question of power uniformly vibrate the mass of concrete contained in the mold, and only the area near which the vibrator is located will be subjected to vibrations of sufficient intensity, while any area distant from the location of the vibrator will only receive strongly attenuated vibrations , which leads to a heterogeneity of the compactness of the concrete, and this all the more that the pipe and the mold are longer.

De même,dans l'installation décrite dans le brevet des Etats-Unis 3.047.929,le vibrage est assuré par des vibrateurs fixés à la partie basse et à la partie haute de la paroi du moule;le béton situé à ces niveaux privilégiés sera parfaitement vibré alors que les zones intercalaires ou celles situées à l'opposé de ces vibrateurs seront nettement moins bien vibrées, conduisant ainsi à une hétérogénéité dans la masse du tuyau formé.Similarly, in the installation described in United States patent 3,047,929, the vibration is ensured by vibrators fixed to the lower part and to the upper part of the mold wall; the concrete located at these preferred levels will be perfectly vibrated while the intermediate zones or those located opposite these vibrators will be much less well vibrated, thus leading to heterogeneity in the mass of the pipe formed.

Par conséquent,avec les moyens utilisés actuellement,au moins l'un des deux paramètres amplitude et fréquence de la vibration n'est pas réglable, ce qui conduit à allonger le temps de l'opération de vibration pour obtenir une qualité acceptable du produit,ceci étant particulièrement sensible avec les vibrateurs externes vibrant de manière anarchique et engendrant des vibrations assez différentes en divers points des moules. En outre,les vibrateurs utilisés actuellement sont très bruyants et rendent les conditions de travail particulièrement pénibles.Consequently, with the means currently used, at least one of the two amplitude and frequency parameters of the vibration is not adjustable, which leads to lengthening the time of the vibration operation to obtain an acceptable quality of the product, this being particularly sensitive with the external vibrators vibrating in an anarchic manner and generating quite different vibrations at various points of the molds. In addition, the vibrators currently used are very noisy and make working conditions particularly difficult.

L'invention a donc essentiellement pour but de proposer un procédé et une installation de moulage de produits en béton vibré qui permettent d'uniformiser les vibrations en tous points de la masse du béton,cette uniformisation des vibrations conduisant à une meilleure compacité et à plus grande homogénéité des produits moulés.The invention therefore essentially aims to provide a method and an installation for molding vibrated concrete products which allow to standardize the vibrations at all points of the mass of the concrete, this standardization of the vibrations leading to a better compactness and greater homogeneity of the molded products.

Contrairement à la technique classique qui consiste à fixer des petits vibrateurs en des endroits particuliers du moule ou encore à noyer dans le béton des éléments vibrants,ce qui conduit à une répartition hétérogène des vibrations dans la masse du béton,la solution proposée selon l'invention consiste à secouer le moule et le béton qu'il contient de telle sorte qu'en agitant l'ensemble, tous les points du moule sont animés d'un même mouvement simultanément et soumis par conséquent à des vibrations unidirectionnelles et parfaitement identiques en tous points de la masse du béton. Par ce procédé,on obtient une maitrise parfaite de la fréquence,ce qui permet de choisir ladite fréquence des vibrations et de s'écarter au maximum de la fréquence de résonance du moule et du béton qu'il contient avec pour conséquences avantageuses de réduire considérablement les nuisances, d'améliorer les conditions de travail et d'éliminer les risques de rupture du moule.Contrary to the classic technique which consists in fixing small vibrators in particular places of the mold or in drowning in the vibrating elements concrete, which leads to a heterogeneous distribution of vibrations in the mass of concrete, the solution proposed according to invention consists in shaking the mold and the concrete which it contains so that by shaking the assembly, all the points of the mold are animated by the same movement simultaneously and consequently subjected to unidirectional vibrations and perfectly identical in all concrete mass points. By this process, a perfect control of the frequency is obtained, which makes it possible to choose said frequency of the vibrations and to deviate as much as possible from the resonance frequency of the mold and of the concrete which it contains with the advantageous consequences of considerably reducing nuisance, improve working conditions and eliminate the risk of mold breakage.

Selon l'invention,le procédé de moulage de produits en béton tels que des tuyaux consiste essentiellement à remplir de béton un moule correspondant au produit à mouler et à agiter en bloc l'ensemble constitué par le moule et le béton qu'il contient.According to the invention, the method of molding concrete products such as pipes consists essentially of filling a mold with concrete corresponding to the product to be molded and of agitating in a block the assembly constituted by the mold and the concrete which it contains.

Préférentiellement,l'opération d'agitation est commencée pendant le remplissage du moule.Preferably, the stirring operation is started during the filling of the mold.

- Selon l'invention,l'installation de moulage pour la mise en oeuvre du procédé comprend, de manière connue en soiun moule à béton et des moyens pour vibrer le béton,ladite installation comprenant en outre un massif de réaction et des supports sur lesquels le moule repose librement, les moyens pour vibrer le béton étant des vérins hydrauliques vibrants qui sont intercalés entre le massif de réaction et le moule contre lesquels ils s'appuient.According to the invention, the molding installation for implementing the method comprises, in known manner a concrete mold and means for vibrating the concrete, said installation further comprising a reaction mass and supports on which the mold rests freely, the means for vibrating the concrete being vibrating hydraulic cylinders which are interposed between the reaction mass and the mold against which they rest.

Les supports sur lesquels le moule repose librement peuvent être constitués par des moyens de suspension accrochés à un appareil de levage ou encore des berceaux horizontaux reposant sur le sol.The supports on which the mold rests freely can be constituted by suspension means attached to a lifting device or even horizontal cradles resting on the ground.

Grâce au fait que les moyens d'accrochage ou de support du moule laissent celui-ci libre de tressauter,qu'un massif de réaction parfaitement rigide sert d'appui et que des vérins vibrants sont intercalés entre le massif de réaction et le moule et s'appuient sur le premier pour secouer le second,on obtient une agitation rapide et unidirectionnelle du moule qui provoque un tassement du béton et une vibration homogène en tous points dans la masse de celui-ci.Ceci permet de réduire le temps de vibration,d'obtenir une meilleure compacité et une grande homogénéité des produits moulés ainsi qu'une parfaite reproductibilité des ces produits,et permet d'éviter les fréquences de résonance susceptibles de détruire à la fois les moules et l'installation.Thanks to the fact that the hooking or support means of the mold leave it free to jump, that a perfectly rigid reaction mass acts as a support and that vibrating jacks are interposed between the reaction mass and the mold and are based on the first to shake the second, a rapid and unidirectional agitation of the mold is obtained which causes the concrete to settle down and a homogeneous vibration at all points in the mass thereof.This reduces the vibration time, to obtain a better compactness and a great homogeneity of the molded products as well as a perfect reproducibility of these products, and makes it possible to avoid the resonant frequencies likely to destroy both the molds and the installation.

L'invention va maintenant être décrite plus en détail en se référant à un mode de réalisation particulier cité à titre d'exemple non limitatif et représenté par le dessin unique annexé.The invention will now be described in more detail with reference to a particular embodiment cited by way of non-limiting example and represented by the single appended drawing.

L'installation représentée est une installation de moulage de tuyaux cylindriques en béton. Cette installation comporte un moule cylindrique 1 suspendu verticalement par l'intermédiaire de tirants 2 à un support 3 accroché à un appareil de levage classique tel qu'un pont roulant ou une grue non représenté.The installation shown is an installation for molding cylindrical concrete pipes. This installation comprises a cylindrical mold 1 suspended vertically by means of tie rods 2 from a support 3 attached to a conventional lifting device such as a traveling crane or a crane not shown.

L'installation comporte en outre un massif de réaction 4,par exemple en béton armé, supportant à sa partie supérieure un chariot mobile 5 porteur d'un bras 6 qui s'étend au-dessus du moule 1 et porte à son extrémité un couvercle de fermeture 7 qui coiffe la partie haute du moule et sert à introduire le béton dans ce dernier par l'intermédiaire d'un conduit d'amenée 8 également porté par le bras 6.The installation further comprises a reaction mass 4, for example of reinforced concrete, supporting at its upper part a mobile carriage 5 carrying an arm 6 which extends above the mold 1 and carries at its end a cover. closure 7 which covers the upper part of the mold and serves to introduce the concrete into the latter via a supply duct 8 also carried by the arm 6.

A la partie basse et à la partie haute de l'enveloppe cylindrique extérieure du moule l,sont fixés des goussets,respectivement 9 et 10, destinés à permettre l'accrochage au moyen d'attaches rapides, respectivement 11 et 12,de tiges de vérins 13 et 14 dont les corps prennent appui et sont fixés sur le massif de réaction 4.Gussets 9 and 10, respectively, are attached to the lower part and to the upper part of the outer cylindrical casing of the mold 1, intended to allow the attachment, by means of quick couplers, 11 and 12, respectively. cylinders 13 and 14 whose bodies are supported and are fixed to the reaction mass 4.

Les vérins 13 et 14 assurant la jonction entre le massif de réaction 4 et le moule monté flottant sous le support 3 sont des vérins vibrants hydrauliques alimentés en synchronisme par une centrale hydraulique non représentée. L'amplitude et la fréquence de leurs vibrations sont réglables indépendamment l'une de l'autre en agissant de manière connue sur le débit et sur la pression du fluide d'alimentation.The jacks 13 and 14 ensuring the junction between the reaction mass 4 and the mold mounted floating under the support 3 are hydraulic vibrating jacks supplied in synchronism by a hydraulic unit not shown. The amplitude and frequency of their vibrations are adjustable independently of one another by acting in a known manner on the flow rate and on the pressure of the supply fluid.

Les secousses synchronisées engendrées par les deux vérins 13 et 14 entraînent la vibration en phase du moule 1 et du béton de remplissage qu'il contient,l'ensemble vibrant en bloc. Ce résultat peut être obtenu,d'une part,grâce au fait que le moule 1 est suspendu flottant sous le support 3,ce qui lui permet de vibrer librement,et grâce au fait que les vibrations sont engendrées et entretenues par des vérins vibrants hydrauliques capables de développer des efforts considérables pendant des intervalles de temps très brefs sous la forme d'impulsions rapides.The synchronized tremors generated by the two cylinders 13 and 14 cause the phase vibration of the mold 1 and of the filling concrete it contains, the whole vibrating unit. This result can be obtained, on the one hand, thanks to the fact that the mold 1 is suspended floating under the support 3, which allows it to vibrate freely, and thanks to the fact that the vibrations are generated and maintained by hydraulic vibrating jacks capable of developing considerable efforts during very short time intervals in the form of rapid pulses.

Toute la masse du béton introduire dans le moule se trouve être ainsi secouée en profondeur,ce qui contribue à son tassement au bas du moule et à l'obtention d'une compacité élevée et homogène en tous points du produit moulé. Les paramètres de vibration sont sensiblement identiques en tous points du moule,ce qui conduit à la fabrication de produits de meilleure qualité, homogènes et reproductibles.The entire mass of concrete introduced into the mold is thus shaken in depth, which contributes to its compaction at the bottom of the mold and to obtaining a high and homogeneous compactness in all points of the molded product. The vibration parameters are substantially identical in all points of the mold, which leads to the production of better quality, homogeneous and reproducible products.

En outre , le montage flottant du moule qui est suspendu sous le support 3 et les attaches rapides 11 et 12 des vérins sur l'enveloppe externe dudit moule permettent de réduire au maximum les temps de manutention. L'installation de moulage décrite ci-dessus est utilisée de la façon suivante:

  • Le moule 1 vide suspendu sous le support 3 par l'intermédiaire des tirants 2 est transporté au moyen d'un engin de manutention quelconque tel qu'une grue ou un portique roulant à proximité du massif de réaction 4,de telle sorte que les tiges des deux vérins 13 et 14 puissent être fixées rapidement sur les deux goussets 9 et 10 à l'aide des attaches rapides 11 et 12.
In addition, the floating mounting of the mold which is suspended under the support 3 and the quick couplings 11 and 12 of the jacks on the external envelope of said mold make it possible to reduce handling times as much as possible. The molding installation described above is used as follows:
  • The empty mold 1 suspended under the support 3 by means of the tie rods 2 is transported by means of any handling machine such as a crane or a gantry crane near the reaction mass 4, so that the rods two cylinders 13 and 14 can be fixed quickly on the two gussets 9 and 10 using the quick couplers 11 and 12.

Le bras 6 porteur du couvercle 7 est ensuite avancé de telle sorte que ledit couvercle vienne coiffer l'extrémité ouverte supérieure du moule 1. On envoie ensuite le béton par l'intermédiaire du conduit 8 qui débouche dans le couvercle 7 et on déclenche le fonctionnement des vérins vibrants 13 et 14 pour qu'ils agitent en phase le moule 1 pendant son remplissage. Lorsque le moule est rempli et que l'opération de vibration est terminée, les tiges des deux vérins vibrants 13 et 14 sont décrochées des goussets 9 et 10 du moule,tandis que le couvercle 7 est soulevé par le bras 6 qui s'efface vers l'arrière de manière à libérer le moule 1 qui est enlevé tandis qu'un nouveau moule vide vient prendre sa place. Grâce à l'utilisation de vérins vibrants,il est possible de régler rapidement et de manière indépendante la fréquence et l'amplitude des secousses vibratoires de manière à les ajuster en fonction de la composition du béton, ces réglages permettant de réduire les temps de vibration à la durée strictement nécessaire à l'obtention du résultat optimum. Outre le gain de temps à la fois sur l'opération elle-même et sur la manutention,l'invention permet d'améliorer les conditions de travail par le fait que le niveau de bruit est considérablement réduit et que les réglages sont facilités.The arm 6 carrying the cover 7 is then advanced so that the said cover covers the upper open end of the mold 1. The concrete is then sent via the conduit 8 which opens into the cover 7 and the operation is started. vibrating jacks 13 and 14 so that they agitate the mold 1 in phase during its filling. When the mold is filled and the vibration operation is complete, the rods of the two vibrating jacks 13 and 14 are detached from the gussets 9 and 10 of the mold, while the cover 7 is lifted by the arm 6 which disappears towards the rear so as to release the mold 1 which is removed while a new empty mold takes its place. Thanks to the use of vibrating cylinders, it is possible to quickly and independently adjust the frequency and amplitude of the vibratory tremors so as to adjust them according to the composition of the concrete, these adjustments making it possible to reduce the vibration times for the time strictly necessary to obtain the optimum result. In addition to saving time both on the operation itself and on handling, the invention makes it possible to improve working conditions by the fact that the noise level is considerably reduced and that the adjustments are facilitated.

Bien entendu,la portée de l'invention n'est pas limitée au seul mode de réalisation décrit précédemment,mais elle s'étend au contraire à toutes les variantes qui ne différeraient que par des détails.Of course, the scope of the invention is not limited to the single embodiment described above, but on the contrary extends to all variants which would differ only in details.

C'est ainsi que,dans l'exemple décrit précédemment,le moule est disposé verticalement et suspendu sous un support accroché à un pont ou à une grue,mais bien évidemment le moule peut aussi être disposé horizontalement et simplement posé sur des berceaux lui laissant toute liberté pour vibrer,les vérins vibrants prenant alors appui d'une part sur le sol et d'autre part sous le moule qu'ils font tressauter en synchronisme.Thus, in the example described above, the mold is arranged vertically and suspended under a support hung on a bridge or a crane, but obviously the mold can also be arranged horizontally and simply placed on cradles leaving it all freedom to vibrate, the vibrating jacks then taking support on the one hand on the ground and on the other hand under the mold which they make jump in synchronism.

En résumé,l'invention procure les avantages suivants:

  • -sur le produit meilleure compacité, plus grande homogénéité, reproductibilité accrue.
  • -sur la productivité: temps de vibration réduit, réduction également des temps de manutention.
  • -sur la machine: permet d'éviter les fréquences de résonance,donc les fréquences de destruction des moules et de l'installation.
  • -sur les conditions de travail: diminution du bruit, facilité de réglage à partir du poste de commande, entretien très faible.
In summary, the invention provides the following advantages:
  • - on the product better compactness, greater homogeneity, increased reproducibility.
  • -on productivity: reduced vibration time, also reduced handling times.
  • -on the machine: avoids the resonant frequencies, therefore the destruction frequencies of the molds and the installation.
  • -on working conditions: noise reduction, ease of adjustment from the control station, very low maintenance.

Claims (5)

1 .Procédé de moulage de produits en béton tels que des tuyaux,consistant notamment à remplir de béton un moule correspondant aux produits à mouler et à vibrer le béton contenu dans le moule,caractérisé en ce qu'on agite l'ensemble formé par le moule et le béton en vue de vibrer ce dernier.1. Process for molding concrete products such as pipes, consisting in particular of filling a mold with concrete corresponding to the products to be molded and of vibrating the concrete contained in the mold, characterized in that the assembly formed by the mold and concrete in order to vibrate the latter. 2. Procédé selon la revendication 1,caractérisé en ce qu'on agite le moule pendant son remplissage.2. Method according to claim 1, characterized in that the mold is agitated during filling. 3. Installation de moulage pour la mise en oeuvre du procédé selon l'une des revendications 1 et 2,ladite installation comprenant un moule à béton et des moyens pour vibrer le béton,caractérisée en ce qu'elle comprend en outre un massif de réaction (4) et des supports flottants (2) du moule (1) sur lesquels il repose librement,en ce que les moyens pour vibrer le béton sont des vérins hydrauliques vibrants (13,14),et en ce que lesdits vérins sont intercalés entre le massif de réaction (4) et le moule (1) contre lesquels ils s'appuient3. Molding installation for implementing the method according to one of claims 1 and 2, said installation comprising a concrete mold and means for vibrating the concrete, characterized in that it further comprises a reaction mass (4) and floating supports (2) of the mold (1) on which it rests freely, in that the means for vibrating the concrete are vibrating hydraulic cylinders (13,14), and in that said cylinders are interposed between the reaction mass (4) and the mold (1) against which they rest 4. Installation selon la revendication 3, caractérisée en ce que les supports sur lesquels le moule repose librement sont essentiellement constitués par des moyens de suspension (2) accrochés à un appareil de levage (3).4. Installation according to claim 3, characterized in that the supports on which the mold rests freely consist essentially of suspension means (2) attached to a lifting device (3). 5. Installation selon la revendication 3, caractérisée en ce que les supports du moule (1) sont des berceaux horizontaux.5. Installation according to claim 3, characterized in that the mold supports (1) are horizontal cradles.
EP19790400978 1978-12-07 1979-12-06 Apparatus for moulding concrete bodies Expired EP0012675B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7834547A FR2443322A1 (en) 1978-12-07 1978-12-07 PROCESS AND INSTALLATION FOR MOLDING CONCRETE PRODUCTS
FR7834547 1978-12-07

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EP0012675A1 true EP0012675A1 (en) 1980-06-25
EP0012675B1 EP0012675B1 (en) 1983-06-01

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EP19790400978 Expired EP0012675B1 (en) 1978-12-07 1979-12-06 Apparatus for moulding concrete bodies

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EP (1) EP0012675B1 (en)
DE (1) DE2965594D1 (en)
FR (1) FR2443322A1 (en)

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GB2292105A (en) * 1994-08-10 1996-02-14 Kameel Diab Sawalha System for producing discrete components or articles from continous fibre metal matrix composite
AT402908B (en) * 1994-05-03 1997-09-25 Hm Betonfertigteilwerk Hans Ma DEVICE FOR PRODUCING THIN FINISHED PARTS FOR LOST FORMWORK PARTS

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US1873412A (en) * 1929-12-14 1932-08-23 Jackson Corwill Molding machine
FR904373A (en) * 1943-12-17 1945-11-05 Vibrating suspension devices
FR1004441A (en) * 1947-04-22 1952-03-31 Improvements made to the means for the implementation of agglomerates of the concrete type

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FR904373A (en) * 1943-12-17 1945-11-05 Vibrating suspension devices
FR1004441A (en) * 1947-04-22 1952-03-31 Improvements made to the means for the implementation of agglomerates of the concrete type

Cited By (3)

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Publication number Priority date Publication date Assignee Title
AT402908B (en) * 1994-05-03 1997-09-25 Hm Betonfertigteilwerk Hans Ma DEVICE FOR PRODUCING THIN FINISHED PARTS FOR LOST FORMWORK PARTS
GB2292105A (en) * 1994-08-10 1996-02-14 Kameel Diab Sawalha System for producing discrete components or articles from continous fibre metal matrix composite
GB2292105B (en) * 1994-08-10 1999-03-17 Kameel Diab Sawalha System for producing discrete components or articles from continuous fibre metal matrix composite

Also Published As

Publication number Publication date
FR2443322B1 (en) 1982-06-18
EP0012675B1 (en) 1983-06-01
FR2443322A1 (en) 1980-07-04
DE2965594D1 (en) 1983-07-07

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