EP0351325A1 - Apparatus for making a ring-shaped element from concrete, in particular for lining a shaft - Google Patents

Apparatus for making a ring-shaped element from concrete, in particular for lining a shaft Download PDF

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Publication number
EP0351325A1
EP0351325A1 EP89420234A EP89420234A EP0351325A1 EP 0351325 A1 EP0351325 A1 EP 0351325A1 EP 89420234 A EP89420234 A EP 89420234A EP 89420234 A EP89420234 A EP 89420234A EP 0351325 A1 EP0351325 A1 EP 0351325A1
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EP
European Patent Office
Prior art keywords
mold
cap
piston head
installation according
annular
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EP89420234A
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German (de)
French (fr)
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EP0351325B1 (en
Inventor
Johann Schlusselbauer
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Schlusselbauer Maschinenbau Te Gaspoltshofen Oost
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Schluesselbauer Maschinenbau
Sabla SA
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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
    • B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
    • B28B21/24—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like
    • 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
    • B28B21/70—Methods or machines specially adapted for the production of tubular articles by building-up from preformed elements
    • B28B21/74—Producing pipe bends, sockets, sleeves; Moulds therefor

Definitions

  • the invention relates to an installation for manufacturing an annular concrete part, in particular a well nozzle, which comprises, on the one hand, a molding device composed of a mold core and a mold body surrounding the remote mold core to define an annular space and, on the other hand, a mold cap which can rotate around its main axis and intended to be placed on the concrete poured into the annular space, said cap being mounted on a head piston can go up and down and able to form a centering tip in the front region of the annular part.
  • the invention also relates to a method of manufacturing an annular concrete part, in particular a well nozzle, which consists of: - molding the part in an annular space defined between a mold core and a mold body, - applying a mold cap to the concrete poured into the annular space using a piston head and rotating the mold cap around its main axis, in order to ensure the molding of a centering tip.
  • the well nozzles and other annular parts which can be aligned axially one after the other, have, at their front ends, directed towards one another, complementary centering nozzles by which the different parts couple to each other.
  • molding devices are used which are composed of a mold core and a mold body between which there remains an annular space in which the quantity of concrete necessary for vibrating is vibrated. the room.
  • annular space of the molding device can be closed in the region of the bottom by a corresponding mold ring, for the manufacture of the upper centering tip, a mold cap must be applied to the concrete poured into the annular space with an appropriate pressure and rotate this cap around its axis, preferably in reciprocating motion, in order to be able to mold the centering tip with sufficient precision.
  • this mold cover is constituted by a rotating ring belonging to a piston head by means of which the necessary contact pressure can be exerted.
  • a disadvantage is that, before demolding, it is necessary, necessarily, to lift the piston with the upper cap to release it from the part, so that not only the manufacturing tolerances are widened, but also there remains a risk of deterioration of the molded centering tip because the concrete's own resistance before hardening is relatively low.
  • the object of the invention is therefore to avoid these drawbacks and to improve the installations and methods of the kind described above, using simple means, so that well nozzles or other parts can be manufactured.
  • concrete annulars having flawless centering tips and having a high stability of resistance to dimensional manufacturing dimensions.
  • the invention solves the problem posed by the fact that the mold cap is connected to the piston head by a temporary coupling device ensuring, by opening and closing, the gripping or loosening of the mold cap.
  • the method according to the invention consists, in order to solve this problem, further: - then to separate the mold cap from the piston head by opening a temporary coupling device connecting the mold cap to the piston head, - and leave in place, at least during demolding, the mold cap.
  • the mold cap Since the mold cap is connected to the piston head by means of a temporary coupling device ensuring an opening or closing, it may not be separate it from the centering tip to unmold the part, so that the stresses detrimental to the holding of the dimensions, which would otherwise act on the concrete not yet hardened in the region of the centering tip during the extraction of the mold cap, are thus deleted. In this way, the mold cap can only be separated from the centering tip after an appropriate hardening of the latter and thanks to the fact that the concrete solidity is now sufficient, there is no longer any alteration of the holding of the dimensions.
  • the mold cap which remains on the part, forms, moreover, an effective protection of the centering tip against mechanical deterioration, so that it is possible to effectively avoid hair cracks or other harmful degradations. the strength of the centering tips. It is certainly necessary to provide a separate mold cap for each part, but the number of mold caps required remains limited because, after having been separated from the parts, the mold caps can be used for the manufacture of new parts.
  • the coupling device intended to connect a mold cap to the piston head by a removable connection, can be of various construction.
  • the mold cap could be provided with coupling lugs which could lock into openings receiving the piston head, this requiring, however, an appropriate alignment of the mold cap relative to the head. piston.
  • Simpler coupling conditions are obtained when, in another embodiment of the invention, the coupling device is preferably composed of at least three collets distributed over the periphery of the piston head and who can grasp a mold cap, even if the cap is not exactly aligned with the piston head.
  • clamps which are provided between the arms of the clamps which are extended beyond the axes of articulation of the jaws of the clamps and which, when they are supplied, close the clamp jaws against the force of an opening spring, which ensures very simple control of the coupling device.
  • the clamps certainly provide self-centering for the mold cap which they grip but, due to the freedom of oscillation of the clamping jaws, the mold cap, gripped by these jaws, will accompany, at least partially, the vibration movement of the molding device, which can lead to an undesirable transmission of vibrations to the piston head.
  • the clamps can bear, at least in the closed position, against a stop secured to the clamp support by means of stop elements secured to the clamp support, by means of elastic rubber-like elements.
  • These elastic elements, of the rubber type can, moreover, define an initial position for the collets.
  • the mold caps In order for the coupling device to be able to grip the different mold caps securely, the mold caps must have a corresponding coupling collar.
  • the various mold caps may have an annular coupling collar intended for the coupling device, which makes the mold caps independent of an angular position of the coupling which should be determined in advance.
  • the coupling device must be able to grip the annular coupling collar, as is the case, for example, for collets.
  • the piston head has at least three centering ribs distributed around the circumference and provided with inclined guide surfaces to receive the annular coupling collar of the mold cap, it is already possible to obtain a centering of the mold during the movement. of axial approximation between the mold cap and the piston head, because if the annular coupling collar meets the guide surface of minus a centering rib, while it is in an off-center position, it is pushed towards the axis of the piston head.
  • the piston head can finally carry at least three ejector fingers movable in the direction axial, distributed around the circumference, to eject the mold cap, so that, when the piston head is raised, after opening the clamps, the mold cap is kept pressed against the part until the ejector fingers move away from the mold cap.
  • the ejector fingers must be controlled by a corresponding force, which is carried out, advantageously, by means of a pressure cylinder.
  • the piston head 1 which can go up and down under the action of a lifting cylinder not shown, and which is part of the installation shown for the manufacture of a concrete well nozzle, has a rotating crown 2 which can be driven in alternating rotation using an oscillation cylinder 3 shown in FIG. 2 .
  • This rotating crown 2 carries a coupling device, preferably formed by three clamps 4 distributed on the circumference and intended to couple to a mold cap 5 which, for this purpose, is provided, in accordance with the representation of fig. 1 , an annular coupling collar 6 which engages between the two jaws 7 of the collets 4 .
  • the jaws 7 of pliers are articulated using pivot pins 9 , in a pliers support 10 which is fixed to the rotating ring 2 in the region of a through opening 11 giving passage to the jaws 7 of pliers.
  • each of the clamps 4 there is provided a clamping cylinder 12 placed between the arms 8 of the clamps, which extend above the hinge pins 9 , the clamping cylinder 12 acting at the against the force of an opening spring 13 which is interposed between the arms 8 of the clamps, on the side opposite to the clamping cylinder 12 with respect to the articulation axes 9 , in a bore 14 produced in a carrying element 15 .
  • the arms 8 of the clamps carry, on their side directed towards the carrying element 15 , elastic elements 16 of the rubber type which cooperate, at least in the closed position of the clamps 4 shown in the figures, with the carrying part 15 playing the role of stop, which excludes, to a large extent, the transmission of the vibration forces acting on the mold sleeve 5 to the rotating ring 2 via the clamps 4 .
  • These elastic elements 16 also have the effect of defining an initial position for the jaws 7 of the pliers.
  • the rotating crown 2 can be provided with at least three centering ribs 17 distributed over its circumference, which form an inclined guide surface 18 for guiding the coupling collar 6 of the mold cap 5 , so that, if the mold cap 5 is placed in an off-center position relative to the rotating crown 2 , during the movement of arrival of the mold cap 5 , in a direction corresponding to its main axis on the guide surface 18 of at least one centering rib 17 , the coupling collar 6 is pushed back towards the axis of the piston head 1 , at least to a sufficient extent to guarantee the safety of the gripping of the coupling collar 6 by the collets 4 .
  • the temporary coupling device ensuring opening or closing functions, formed by the clamps 4 , the mold cap 5 , placed on the concrete poured between a mold core and a surrounding mold body at a distance.
  • the mold core can be separated from the piston head 1 , after the upper centering tip of the well nozzle has been molded to the shape of the profile of the mold cap, the cap 5 being able to remain on the collar centering the nozzle, at least during the demolding operation of the nozzle, to form a protective ring.
  • the object of the invention finds a particularly advantageous application for the production of centering nozzles formed by forming at the end of well nozzles or the like in concrete.

Abstract

Making a centring sleeve for a ring-shaped element. The installation according to the invention comprises, firstly, a moulding device consisting of a mould core and a mould body surrounding the mould core at a distance in order to define a ring-shaped space, and, secondly, a mould cover (5) capable of rotation about its main axis and intended to be positioned on the concrete cast in the ring-shaped space, the said cover being mounted on a piston head (1) which is able to ascend and descend and is capable of forming a centring sleeve in the frontal region of the ring-shaped element, characterised in that the mould cover (5) is connected to the piston head (1) by a temporary coupling device which, by opening and closing, effects the gripping or the release of the mould cover (5). Application to installations and processes for making ring-shaped elements from concrete. <IMAGE>

Description

L'invention concerne une installation pour fabriquer une pièce annulaire en béton, en particulier, une buse de puits, qui comprend, d'une part, un dispositif de moulage composé d'un noyau de moule et d'un corps de moule entourant le noyau de moule à distance pour définir un espace annulaire et, d'autre part, une coiffe de moule pouvant tourner autour de son axe principal et destinée à être posée sur le béton coulé dans l'espace annulaire, ladite coiffe étant montée sur une tête de piston pouvant monter et descendre et apte à former un embout de centrage dans la région frontale de la pièce annulaire.The invention relates to an installation for manufacturing an annular concrete part, in particular a well nozzle, which comprises, on the one hand, a molding device composed of a mold core and a mold body surrounding the remote mold core to define an annular space and, on the other hand, a mold cap which can rotate around its main axis and intended to be placed on the concrete poured into the annular space, said cap being mounted on a head piston can go up and down and able to form a centering tip in the front region of the annular part.

L'invention concerne, également, un procédé de fabrication d'une pièce annulaire en béton, en particulier, d'une buse de puits, qui consiste :
- à mouler la pièce dans un espace annulaire défini entre un noyau de moule et un corps de moule,
- à appliquer une coiffe de moule sur le béton coulé dans l'espace annulaire à l'aide d'une tête de piston et à faire tourner la coiffe de moule autour de son axe principal, en vue d'assurer le moulage d'un embout de centrage.The invention also relates to a method of manufacturing an annular concrete part, in particular a well nozzle, which consists of:
- molding the part in an annular space defined between a mold core and a mold body,
- applying a mold cap to the concrete poured into the annular space using a piston head and rotating the mold cap around its main axis, in order to ensure the molding of a centering tip.

Les buses de puits et autres pièces annulaires qui peuvent être alignées axialement les unes à la suite des autres, présentent, à leurs extrémités frontales, dirigées l'une vers l'autre, des embouts de centrage complémentaires par lesquels les différentes pièces s'accouplent les unes aux autres. Pour la fabrication mécanique de telles pièces annulaires en béton, on utilise des dispositifs de moulage qui sont composés d'un noyau de moule et d'un corps de moule entre lesquels il subsiste un espace annulaire dans lequel on vibre la quantité de béton nécessaire pour la pièce. Alors que le moulage de l'embout de centrage inférieur de la pièce n'offre pas de difficultés, car l'espace annulaire du dispositif de moulage peut être fermé dans la région du fond par un anneau de moule correspondant, pour la fabrication de l'embout de centrage supérieur, on doit appliquer une coiffe de moule sur le béton coulé dans l'espace annulaire avec une pression appropriée et faire tourner cette coiffe autour de son axe, de préférence en mouvement alternatif, pour pouvoir mouler l'embout de centrage avec une précision suffisante. Dans les installations connues, cette coiffe de moule est constituée par un anneau tournant appartenant à une tête de piston par l'intermédiaire de laquelle on peut exercer la pression d'appui nécessaire. Toutefois, un inconvénient consiste en ce que, avant le démoulage, on doit, nécessairement, soulever le piston avec la coiffe supérieure pour la dégager de la pièce, de sorte que, non seulement les tolérances de fabrication sont élargies, mais qu'en outre il subsiste un risque de détérioration de l'embout de centrage démoulé parce que la résistance propre du béton avant le durcissement est relativement faible.The well nozzles and other annular parts which can be aligned axially one after the other, have, at their front ends, directed towards one another, complementary centering nozzles by which the different parts couple to each other. For the mechanical manufacture of such annular concrete parts, molding devices are used which are composed of a mold core and a mold body between which there remains an annular space in which the quantity of concrete necessary for vibrating is vibrated. the room. While the molding of the lower centering piece of the part does not present any difficulties, since the annular space of the molding device can be closed in the region of the bottom by a corresponding mold ring, for the manufacture of the upper centering tip, a mold cap must be applied to the concrete poured into the annular space with an appropriate pressure and rotate this cap around its axis, preferably in reciprocating motion, in order to be able to mold the centering tip with sufficient precision. In known installations, this mold cover is constituted by a rotating ring belonging to a piston head by means of which the necessary contact pressure can be exerted. However, a disadvantage is that, before demolding, it is necessary, necessarily, to lift the piston with the upper cap to release it from the part, so that not only the manufacturing tolerances are widened, but also there remains a risk of deterioration of the molded centering tip because the concrete's own resistance before hardening is relatively low.

L'invention a donc pour but d'éviter ces inconvénients et de perfectionner les installations et procédés, du genre décrit précédemment, à l'aide de moyens simples, de telle manière qu'on puisse fabriquer des buses de puits ou d'autres pièces annulaires en béton possédant des embouts de centrage sans défaut et possédant une haute stabilité de tenue des cotes dimensionnelles de fabrication.The object of the invention is therefore to avoid these drawbacks and to improve the installations and methods of the kind described above, using simple means, so that well nozzles or other parts can be manufactured. concrete annulars having flawless centering tips and having a high stability of resistance to dimensional manufacturing dimensions.

L'invention résout le problème posé par le fait que la coiffe de moule est reliée à la tête de piston par un dispositif d'accouplement temporaire assurant, par ouverture et fermeture, la préhension ou le relachement de la coiffe de moule.The invention solves the problem posed by the fact that the mold cap is connected to the piston head by a temporary coupling device ensuring, by opening and closing, the gripping or loosening of the mold cap.

Le procédé selon l'invention consiste, pour résoudre ce problème, en outre :
- à séparer ensuite la coiffe du moule de la tête de piston par ouverture d'un dispositif d'accouplement temporaire reliant la coiffe de moule à la tête de piston,
- et à laisser en place, au moins pendant le démoulage, la coiffe de moule.The method according to the invention consists, in order to solve this problem, further:
- then to separate the mold cap from the piston head by opening a temporary coupling device connecting the mold cap to the piston head,
- and leave in place, at least during demolding, the mold cap.

Etant donné que la coiffe de moule est reliée à la tête du piston par l'intermédiaire d'un dispositif d'accouplement temporaire assurant une ouverture ou une fermeture, on peut ne pas la séparer de l'embout de centrage pour démouler la pièce, de sorte que les contraintes nuisibles à la tenue des cotes, qui autrement agiraient sur le béton non encore durci dans la région de l'embout de centrage lors de l'extraction de la coiffe de moule, sont ainsi supprimées. De cette façon, la coiffe de moule peut n'être séparée de l'embout de centrage qu'après un durcissement approprié de ce dernier et grâce au fait que la solidité propre du béton est maintenant suffisante, il n'y a plus d'altération de la tenue des cotes. La coiffe de moule, qui subsiste sur la pièce, forme, par ailleurs, une protection efficace de l'embout de centrage vis-à-vis des détériorations mécaniques, de sorte que l'on peut éviter efficacement les fissures capillaires ou autres dégradations nuisibles à la solidité des embouts de centrage. Il est, certes, nécessaire de prévoir une coiffe de moule distincte pour chaque pièce, mais le nombre des coiffes de moules nécessaires reste limité car, après avoir été séparées des pièces, les coiffes de moules peuvent être utilisées pour la fabrication de nouvelles pièces.Since the mold cap is connected to the piston head by means of a temporary coupling device ensuring an opening or closing, it may not be separate it from the centering tip to unmold the part, so that the stresses detrimental to the holding of the dimensions, which would otherwise act on the concrete not yet hardened in the region of the centering tip during the extraction of the mold cap, are thus deleted. In this way, the mold cap can only be separated from the centering tip after an appropriate hardening of the latter and thanks to the fact that the concrete solidity is now sufficient, there is no longer any alteration of the holding of the dimensions. The mold cap, which remains on the part, forms, moreover, an effective protection of the centering tip against mechanical deterioration, so that it is possible to effectively avoid hair cracks or other harmful degradations. the strength of the centering tips. It is certainly necessary to provide a separate mold cap for each part, but the number of mold caps required remains limited because, after having been separated from the parts, the mold caps can be used for the manufacture of new parts.

Le dispositif d'accouplement, destiné à relier une coiffe de moule à la tête de piston par une liaison démontable, peut être de construction variée. C'est ainsi que la coiffe de moule pourrait être munie d'ergots d'accouplement qui pourraient se verrouiller dans des ouvertures réceptrices de la tête de piston, ceci exigeant, toutefois, un alignement approprié de la coiffe de moule par rapport à la tête de piston. On obtient des conditions d'accouplement plus simples lorsque, dans une autre forme de réalisation de l'invention, le dispositif d'accouplement est composé, de préférence, d'au moins trois pinces de serrage réparties sur la périphérie de la tête de piston et qui peuvent saisir une coiffe de moule, même si la coiffe n'est pas exactement alignée par rapport à la tête de piston.The coupling device, intended to connect a mold cap to the piston head by a removable connection, can be of various construction. Thus, the mold cap could be provided with coupling lugs which could lock into openings receiving the piston head, this requiring, however, an appropriate alignment of the mold cap relative to the head. piston. Simpler coupling conditions are obtained when, in another embodiment of the invention, the coupling device is preferably composed of at least three collets distributed over the periphery of the piston head and who can grasp a mold cap, even if the cap is not exactly aligned with the piston head.

L'actionnement de ces pinces de serrage peut, avantageusement, être assuré à l'aide de vérins de serrage qui sont prévus entre les bras des pinces qui sont prolongés au-delà des axes d'articulation des mâchoires des pinces et qui, lorsqu'ils sont alimentés, ferment les mâchoires de pinces à l'encontre de la force d'un ressort d'ouverture, ce qui assure une commande très simple du dispositif d'accouplement.The actuation of these clamps can advantageously be ensured using clamps which are provided between the arms of the clamps which are extended beyond the axes of articulation of the jaws of the clamps and which, when they are supplied, close the clamp jaws against the force of an opening spring, which ensures very simple control of the coupling device.

Les pinces de serrage assurent, certes, un autocentrage pour la coiffe de moule qu'elles saisissent mais, en raison de la liberté d'oscillation des mâchoires de serrage, la coiffe de moule, saisie par ces mâchoires, accompagnera, au moins partiellement, le mouvement de vibration du dispositif de moulage, ce qui peut conduire à une transmission indésirable des vibrations à la tête de piston. Pour amortir ces vibrations, les pinces de serrage peuvent prendre appui, du moins dans la position de fermeture, contre une butée solidaire du support de pinces par l'intermédiaire d'éléments de butée solidaires du support de pinces, par l'intermédiaire d'éléments élastiques du type caoutchouc. Ces éléments élastiques, du type caoutchouc, peuvent, par ailleurs, définir une position initiale pour les pinces de serrage.The clamps certainly provide self-centering for the mold cap which they grip but, due to the freedom of oscillation of the clamping jaws, the mold cap, gripped by these jaws, will accompany, at least partially, the vibration movement of the molding device, which can lead to an undesirable transmission of vibrations to the piston head. To dampen these vibrations, the clamps can bear, at least in the closed position, against a stop secured to the clamp support by means of stop elements secured to the clamp support, by means of elastic rubber-like elements. These elastic elements, of the rubber type, can, moreover, define an initial position for the collets.

Pour que le dispositif d'accouplement puisse saisir les différentes coiffes de moules avec sécurité, il faut que les coiffes de moules présentent un collet d'accouplement correspondant. Pour ne pas être limités à la position angulaire des coiffes de moules par rapport à la tête de piston, les différentes coiffes de moules peuvent présenter un collet d'accouplement annulaire destiné au dispositif d'accouplement, qui rend les coiffes de moules indépendantes d'une position angulaire de l'accouplement qui devrait être déterminée à l'avance. Naturellement, le dispositif d'accouplement doit pouvoir saisir le collet d'accouplement annulaire, comme c'est le cas, par exemple, pour les pinces de serrage.In order for the coupling device to be able to grip the different mold caps securely, the mold caps must have a corresponding coupling collar. In order not to be limited to the angular position of the mold caps relative to the piston head, the various mold caps may have an annular coupling collar intended for the coupling device, which makes the mold caps independent of an angular position of the coupling which should be determined in advance. Naturally, the coupling device must be able to grip the annular coupling collar, as is the case, for example, for collets.

Si la tête de piston possède au moins trois nervures de centrage réparties sur la circonférence et munies de surfaces de guidage inclinées pour recevoir le collet d'accouplement annulaire de la coiffe de moule, on peut déjà obtenir un centrage préalable du moule au cours du mouvement de rapprochement axial entre la coiffe de moule et la tête du piston, car si le collet d'accouplement annulaire rencontre la surface de guidage d'au moins une nervure de centrage, alors qu'il est dans une position décentrée, il est repoussé vers l'axe de la tête de piston.If the piston head has at least three centering ribs distributed around the circumference and provided with inclined guide surfaces to receive the annular coupling collar of the mold cap, it is already possible to obtain a centering of the mold during the movement. of axial approximation between the mold cap and the piston head, because if the annular coupling collar meets the guide surface of minus a centering rib, while it is in an off-center position, it is pushed towards the axis of the piston head.

Afin qu'il ne puisse pas s'exercer de force de soulèvement sur la coiffe de moule au moment où l'on sépare la tête de piston de la coiffe, la tête de piston peut finalement porter au moins trois doigts éjecteurs mobiles dans la direction axiale, répartis sur la circonférence, pour éjecter la coiffe de moule, de sorte que, lorsque la tête de piston est relevée, après l'ouverture des pinces de serrage, la coiffe de moule est retenue pressée contre la pièce jusqu'à ce que les doigts éjecteurs s'écartent de la coiffe de moule. A cet effet, les doigts éjecteurs doivent être commandés par une force correspondante, ce qui s'effectue, avantageusement, par l'intermédiaire d'un vérin de pression.So that it cannot exert a lifting force on the mold cap when the piston head is separated from the cap, the piston head can finally carry at least three ejector fingers movable in the direction axial, distributed around the circumference, to eject the mold cap, so that, when the piston head is raised, after opening the clamps, the mold cap is kept pressed against the part until the ejector fingers move away from the mold cap. For this purpose, the ejector fingers must be controlled by a corresponding force, which is carried out, advantageously, by means of a pressure cylinder.

Sur les figures, on a représenté, de manière schématique et à titre d'exemple, l'objet de l'invention.

  • La fig. 1 représente une installation conforme à l'invention, destinée à la fabrication d'une pièce annulaire en béton, selon une coupe axiale schématique de la région du bord de la tête de piston.
  • La fig. 2 est une coupe, perpendiculaire à l'axe de la tête de piston, effectuée selon la ligne II-II de la fig. 1, à échelle réduite.
The figures show schematically and by way of example the object of the invention.
  • Fig. 1 shows an installation according to the invention, intended for the manufacture of an annular concrete part, in a schematic axial section of the region of the edge of the piston head.
  • Fig. 2 is a section, perpendicular to the axis of the piston head, made along line II-II of FIG. 1 , on a reduced scale.

La tête de piston 1, qui peut monter et descendre sous l'action d'un vérin de levage non représenté, et qui fait partie de l'installation représentée pour la fabrication d'une buse de puits en béton, possède une couronne tournante 2 qui peut être entraînée en rotation alternative à l'aide d'un vérin d'oscillation 3 représenté sur la fig. 2. Cette couronne tournante 2 porte un dispositif d'accouplement, formé, de préférence, par trois pinces de serrage 4 réparties sur la circonférence et destinées à s'accoupler à une coiffe de moule 5 qui, à cet effet, est munie, conformément à la représentation de la fig. 1, d'un collet d'accouplement annulaire 6 qui s'engage entre les deux mâchoires 7 des pinces de serrage 4. Les mâchoires 7 de pinces, prévues sur les bras 8 des pinces, sont articulées à l'aide d'axes de pivotement 9, dans un support de pince 10 qui est fixé à la couronne tournante 2 dans la région d'une ouverture traversante 11 donnant passage aux mâchoires 7 de pinces.The piston head 1 , which can go up and down under the action of a lifting cylinder not shown, and which is part of the installation shown for the manufacture of a concrete well nozzle, has a rotating crown 2 which can be driven in alternating rotation using an oscillation cylinder 3 shown in FIG. 2 . This rotating crown 2 carries a coupling device, preferably formed by three clamps 4 distributed on the circumference and intended to couple to a mold cap 5 which, for this purpose, is provided, in accordance with the representation of fig. 1 , an annular coupling collar 6 which engages between the two jaws 7 of the collets 4 . The jaws 7 of pliers, provided on the arms 8 of the pliers, are articulated using pivot pins 9 , in a pliers support 10 which is fixed to the rotating ring 2 in the region of a through opening 11 giving passage to the jaws 7 of pliers.

Pour l'actionnement de chacune des pinces de serrage 4, il est prévu un vérin de serrage 12 placé entre les bras 8 des pinces, lesquels se prolongent au-dessus des axes d'articulation 9, le vérin de serrage 12 agissant à l'encontre de la force d'un ressort d'ouverture 13 qui est intercalé entre les bras 8 des pinces, sur le côté opposé au vérin de serrage 12 par rapport aux axes d'articulation 9, dans un perçage 14 réalisé dans un élément porteur 15. Les bras 8 des pinces portent, sur leur côté dirigé vers l'élément porteur 15, des éléments élastiques 16 du type caoutchouc qui coopèrent, du moins dans la position de fermeture des pinces de serrage 4 représentée aux figures, avec la partie porteuse 15 jouant le rôle de butée, ce qui exclut, dans une large mesure, la transmission des forces de vibration agissant sur le manchon de moule 5 à la couronne tournante 2 par l'intermédiaire des pinces de serrage 4. Ces éléments élastiques 16 ont, en outre, pour effet de définir une position initiale pour les mâchoires 7 des pinces.For the actuation of each of the clamps 4 , there is provided a clamping cylinder 12 placed between the arms 8 of the clamps, which extend above the hinge pins 9 , the clamping cylinder 12 acting at the against the force of an opening spring 13 which is interposed between the arms 8 of the clamps, on the side opposite to the clamping cylinder 12 with respect to the articulation axes 9 , in a bore 14 produced in a carrying element 15 . The arms 8 of the clamps carry, on their side directed towards the carrying element 15 , elastic elements 16 of the rubber type which cooperate, at least in the closed position of the clamps 4 shown in the figures, with the carrying part 15 playing the role of stop, which excludes, to a large extent, the transmission of the vibration forces acting on the mold sleeve 5 to the rotating ring 2 via the clamps 4 . These elastic elements 16 also have the effect of defining an initial position for the jaws 7 of the pliers.

Pour garantir un centrage préalable de la coiffe de moule 5, conduisant à la préhension sûre et effective de la coiffe 5 par les pinces 4 avec des moyens simples, la couronne tournante 2 peut être munie d'au moins trois nervures de centrage 17 réparties sur sa circonférence, qui forment une surface de guidage inclinée 18 pour guider le collet d'accouplement 6 de la coiffe de moule 5, de sorte que, si la coiffe de moule 5 est placée dans une position décentrée par rapport à la couronne tournante 2, pendant le mouvement d'arrivée de la coiffe de moule 5, selon une direction correspondant à son axe principal sur la surface de guidage 18 d'au moins une nervure de centrage 17, le collet d'accouplement 6 est repoussé vers l'axe de la tête de piston 1, du moins dans une mesure suffisante pour garantir la sécurité de la préhension du collet d'accouplement 6 par les pinces de serrage 4.To ensure prior centering of the mold cap 5 , leading to the safe and effective gripping of the cap 5 by the clamps 4 with simple means, the rotating crown 2 can be provided with at least three centering ribs 17 distributed over its circumference, which form an inclined guide surface 18 for guiding the coupling collar 6 of the mold cap 5 , so that, if the mold cap 5 is placed in an off-center position relative to the rotating crown 2 , during the movement of arrival of the mold cap 5 , in a direction corresponding to its main axis on the guide surface 18 of at least one centering rib 17 , the coupling collar 6 is pushed back towards the axis of the piston head 1 , at least to a sufficient extent to guarantee the safety of the gripping of the coupling collar 6 by the collets 4 .

Grâce au dispositif d'accouplement temporaire, assurant des fonctions d'ouverture ou de fermeture, formé par les pinces de serrage 4, la coiffe de moule 5, posée sur le béton coulé entre un noyau de moule et un corps de moule entourant à distance le noyau du moule, peut être séparée de la tête de piston 1, après que l'embout de centrage supérieur de la buse de puits a été moulé à la forme du profil de la coiffe de moule, la coiffe 5 pouvant rester sur le collet de centrage de la buse, au moins pendant l'opération de démoulage de la buse, pour constituer un anneau protecteur. La possibilité de ne séparer la coiffe de moule de l'embout de centrage qu'après un durcissement suffisant du béton, apporte, en dehors d'une haute stabilité de tenue des cotes dimensionnelles, une fabrication sans défaut des embouts de centrage des buses de puits, puisque ces embouts de centrage restent protégés des détériorations mécaniques par la coiffe de moule pendant le durcissement du béton.Thanks to the temporary coupling device, ensuring opening or closing functions, formed by the clamps 4 , the mold cap 5 , placed on the concrete poured between a mold core and a surrounding mold body at a distance. the mold core, can be separated from the piston head 1 , after the upper centering tip of the well nozzle has been molded to the shape of the profile of the mold cap, the cap 5 being able to remain on the collar centering the nozzle, at least during the demolding operation of the nozzle, to form a protective ring. The possibility of separating the mold cap from the centering tip only after sufficient hardening of the concrete, brings, apart from a high stability of dimensional dimension resistance, a faultless manufacture of the centering tips of the nozzles of well, since these centering tips remain protected from mechanical damage by the mold cap during the hardening of the concrete.

Afin qu'il puisse être garanti dans toutes les circonstances que, après l'ouverture des pinces de serrage 4, au moment du relevage de la tête de piston 1 au-dessus du dispositif de moulage, il ne se produira aucun déplacement relatif entre la coiffe de moule 5 et la pièce, il peut être prévu, sur la couronne tournante 2 de la tête de piston 1, trois doigts éjecteurs 19 répartis sur la circonférence, qui peuvent être commandés à l'aide de vérins de pression 20, de manière que les doigts éjecteurs 19, abaissés contre le collet d'accouplement 6, maintiennent la coiffe de moule 5 sur la pièce jusqu'à ce que, lors de l'arrivée des vérins de pression 20 à leur course maximale, les doigts éjecteurs 19 soient eux aussi écartés du collet d'accouplement 6.So that it can be guaranteed in all circumstances that, after the opening of the collets 4 , when the piston head 1 is raised above the molding device, no relative displacement will occur between the mold cap 5 and the part, there may be provided, on the rotating crown 2 of the piston head 1 , three ejector fingers 19 distributed over the circumference, which can be controlled using pressure cylinders 20 , so that the ejector fingers 19 , lowered against the coupling collar 6 , hold the mold cap 5 on the workpiece until, when the pressure cylinders 20 arrive at their maximum stroke, the ejector fingers 19 are also removed from the coupling collar 6.

L'objet de l'invention trouve une application particulièrement intéressante pour la réalisation d'embouts de centrage ménagés par formage à l'extrémité de buses de puits ou analogues en béton.The object of the invention finds a particularly advantageous application for the production of centering nozzles formed by forming at the end of well nozzles or the like in concrete.

L'invention n'est pas limitée aux exemples décrits et représentés, car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown, since various modifications can be made thereto without going beyond its scope.

Claims (10)

1 - Installation pour fabriquer une pièce annulaire en béton, en particulier une buse de puits, qui comprend, d'une part, un dispositif de moulage composé d'un noyau de moule et d'un corps de moule entourant le noyau de moule à distance pour définir un espace annulaire et, d'autre part, une coiffe de moule (5) pouvant tourner autour de son axe principal et destinée à être posée sur le béton coulé dans l'espace annulaire, ladite coiffe étant montée sur une tête de piston (1) pouvant monter et descendre et apte à former un embout de centrage dans la région frontale de la pièce annulaire,
caractérisée en ce que la coiffe de moule (5) est reliée à la tête de piston (1) par un dispositif d'accouplement temporaire assurant, par ouverture et fermeture, la préhension ou le relâchement de la coiffe de moule (5). 1 - Installation for manufacturing an annular concrete part, in particular a well nozzle, which comprises, on the one hand, a molding device composed of a mold core and a mold body surrounding the mold core to distance to define an annular space and, on the other hand, a mold cap ( 5 ) which can rotate about its main axis and intended to be placed on the concrete poured into the annular space, said cap being mounted on a head piston ( 1 ) able to move up and down and able to form a centering tip in the front region of the annular part,
characterized in that the mold cap ( 5 ) is connected to the piston head ( 1 ) by a temporary coupling device ensuring, by opening and closing, the gripping or loosening of the mold cap ( 5 ). 2 - Installation selon la revendication 1, caractérisée en ce que le dispositif d'accouplement est composé d'un ensemble de pinces de serrage (4) réparties sur la périphérie de la tête de piston (3). 2 - Installation according to claim 1 , characterized in that the coupling device is composed of a set of clamps ( 4 ) distributed over the periphery of the piston head ( 3 ). 3 - Installation selon la revendication 2, caractérisée en ce que chaque pince de serrage (4) comporte deux bras (8) articulés et actionnés à l'encontre de la force d'un ressort d'ouverture (13) par un vérin de serrage (12) disposé entre les bras (8). 3 - Installation according to claim 2 , characterized in that each clamp ( 4 ) comprises two arms ( 8 ) articulated and actuated against the force of an opening spring ( 13 ) by a clamping cylinder ( 12 ) disposed between the arms ( 8 ). 4 - Installation selon la revendication 3, caractérisée en ce que chaque bras (8) est articulé sur un support de pince (10) au moyen d'un axe de pivotement (9), le ressort d'ouverture (13) étant intercalé entre les prolongements du bras (8) situés à l'opposé du vérin de serrage (12) par rapport aux axes de pivotement (9). 4 - Installation according to claim 3, characterized in that each arm ( 8 ) is articulated on a clamp support ( 10 ) by means of a pivot axis ( 9 ), the opening spring ( 13 ) being interposed between the extensions of the arm ( 8 ) located opposite the clamping cylinder ( 12 ) relative to the pivot axes ( 9 ). 5 - Installation selon la revendication 4, caractérisée en ce que les pinces de serrage (4) prennent appui, au moins dans la position de fermeture, contre une butée (15) solidaire du support de pinces (10) par l'intermédiaire d'éléments élastiques (16) du type caoutchouc. 5 - Installation according to claim 4, characterized in that the clamps ( 4 ) bear, at least in the closed position, against a stop ( 15 ) secured to the clamp holder ( 10 ) by means of elastic elements ( 16 ) of the rubber type. 6 - Installation selon la revendication 1, caractérisée en ce que la coiffe de moule (5) présente un collet d'accouplement annulaire (6) pour coopérer avec le dispositif d'accouplement. 6 - Installation according to claim 1, characterized in that the mold cap ( 5 ) has an annular coupling collar ( 6 ) to cooperate with the coupling device. 7 - Installation selon la revendication 2, caractérisée en ce que l'ensemble de pinces comporte au moins trois pinces de serrage. 7 - Installation according to claim 2, characterized in that the set of pliers comprises at least three clamps. 8 - Installation selon les revendications 6 et 7, caractérisée en ce que la tête de piston (1) présente au moins trois nervures de centrage (17) réparties sur sa circonférence et présentant des surfaces de guidage inclinées (18) pour guider le collet d'accouplement annulaire (6) de la coiffe de moulage (5). 8 - Installation according to claims 6 and 7, characterized in that the piston head ( 1 ) has at least three centering ribs ( 17 ) distributed over its circumference and having inclined guide surfaces ( 18 ) for guiding the collar d annular coupling ( 6 ) of the molding cap ( 5 ). 9 - Installation selon la revendication 8, caractérisée en ce que la tête de piston (1) porte au moins trois doigts éjecteurs (19) répartis sur sa circonférence, mobiles dans la direction axiale et destinés à éjecter la coiffe de moule (5). 9 - Installation according to claim 8 , characterized in that the piston head ( 1 ) carries at least three ejector fingers ( 19 ) distributed around its circumference, movable in the axial direction and intended to eject the mold cap ( 5 ). 10 - Procédé de fabrication d'une pièce annulaire en béton, en particulier d'une buse de puits, qui consiste à :
. mouler la pièce dans un espace annulaire défini entre un noyau de moule et un corps de moule,
. appliquer une coiffe de moule (5) sur le béton coulé dans l'espace annulaire à l'aide d'une tête de piston (1) et à faire tourner la coiffe de moule (5) autour de son axe principal, en vue d'assurer le moulage d'un embout de centrage,
caractérisé en ce que le procédé consiste, en outre :
- à séparer ensuite la coiffe de moule (5) de la tête de piston (1) par ouverture d'un dispositif d'accouplement temporaire reliant la coiffe de moule (5) à la tête de piston (1),
- et à laisser en place, au moins pendant le démoulage, la coiffe de moule (5). 10 - Method for manufacturing an annular concrete part, in particular a well nozzle, which consists in:
. mold the part in an annular space defined between a mold core and a mold body,
. apply a mold cap ( 5 ) to the concrete poured into the annular space using a piston head ( 1 ) and rotate the mold cap ( 5 ) around its main axis, in view of '' molding a centering tip,
characterized in that the method further comprises:
- then to separate the mold cap ( 5 ) from the piston head ( 1 ) by opening a temporary coupling device connecting the mold cap ( 5 ) to the piston head ( 1 ),
- And leave in place, at least during demolding, the mold cover ( 5 ).
EP19890420234 1988-06-30 1989-06-30 Apparatus for making a ring-shaped element from concrete, in particular for lining a shaft Expired - Lifetime EP0351325B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0170288A AT398185B (en) 1988-06-30 1988-06-30 DEVICE FOR PRODUCING A RING-SHAPED FOLD ON A CONCRETE WORKPIECE, IN PARTICULAR A CHAIN RING
AT1702/88 1988-06-30

Publications (2)

Publication Number Publication Date
EP0351325A1 true EP0351325A1 (en) 1990-01-17
EP0351325B1 EP0351325B1 (en) 1992-06-03

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ID=3519135

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Application Number Title Priority Date Filing Date
EP19890420234 Expired - Lifetime EP0351325B1 (en) 1988-06-30 1989-06-30 Apparatus for making a ring-shaped element from concrete, in particular for lining a shaft

Country Status (4)

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EP (1) EP0351325B1 (en)
AT (2) AT398185B (en)
DE (1) DE68901691T2 (en)
ES (1) ES2033121T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1223014A1 (en) * 2001-01-16 2002-07-17 Schlüsselbauer, Johann Apparatus for manufactoring annular concrete bodies

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GB260791A (en) * 1925-12-02 1926-11-11 Int De Lavaud Mfg Corp Ltd Improvements in cores for pipe moulds
US2359214A (en) * 1943-02-03 1944-09-26 Frank C George Mold core element
US2870513A (en) * 1955-04-28 1959-01-27 Archie R Gagne Pipe making apparatus
FR1190293A (en) * 1958-01-21 1959-10-12 Brouiller & Cie Press and manufacturing process for forming bell flares on cement pipes
US3341910A (en) * 1963-11-07 1967-09-19 Pedershaab Maskinfabrik As Apparatus for moulding concrete pipes having a circumferential recess in the outer spigot end surface
US3452407A (en) * 1966-09-30 1969-07-01 Concrete Pipe Machinery Co Ring positioning apparatus for concrete pipe manufacture
US3696182A (en) * 1970-06-29 1972-10-03 Carl R Joelson Method for producing concrete pipe
US4101622A (en) * 1974-07-15 1978-07-18 Ameron, Inc. Method of casting beveled pipe
EP0089420A1 (en) * 1982-03-23 1983-09-28 Ballast-Nedam Groep N.V. Method, apparatus and mould for manufacturing concrete tubes
DE3323340A1 (en) * 1983-06-29 1985-01-03 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Moulding apparatus for producing concrete mouldings

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US766739A (en) * 1902-05-20 1904-08-02 Maurice T Stevens Pipe-mold.
US1941812A (en) * 1932-04-21 1934-01-02 Muntz Eric Percival Machine for the production of a plurality of substantially similar units
DK127176B (en) * 1972-02-09 1973-10-01 Pedershaab Maskinfabrik As Support ring for newly cast pipes of concrete or similar material during hardening.
DE3203543A1 (en) * 1982-02-03 1983-08-04 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Process and apparatus for producing concrete mouldings
DE3400349A1 (en) * 1984-01-07 1985-07-18 Prinzing Georg Gmbh Co Kg Process and device for producing mouldings from concrete

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Publication number Priority date Publication date Assignee Title
GB260791A (en) * 1925-12-02 1926-11-11 Int De Lavaud Mfg Corp Ltd Improvements in cores for pipe moulds
US2359214A (en) * 1943-02-03 1944-09-26 Frank C George Mold core element
US2870513A (en) * 1955-04-28 1959-01-27 Archie R Gagne Pipe making apparatus
FR1190293A (en) * 1958-01-21 1959-10-12 Brouiller & Cie Press and manufacturing process for forming bell flares on cement pipes
US3341910A (en) * 1963-11-07 1967-09-19 Pedershaab Maskinfabrik As Apparatus for moulding concrete pipes having a circumferential recess in the outer spigot end surface
US3452407A (en) * 1966-09-30 1969-07-01 Concrete Pipe Machinery Co Ring positioning apparatus for concrete pipe manufacture
US3696182A (en) * 1970-06-29 1972-10-03 Carl R Joelson Method for producing concrete pipe
US4101622A (en) * 1974-07-15 1978-07-18 Ameron, Inc. Method of casting beveled pipe
EP0089420A1 (en) * 1982-03-23 1983-09-28 Ballast-Nedam Groep N.V. Method, apparatus and mould for manufacturing concrete tubes
DE3323340A1 (en) * 1983-06-29 1985-01-03 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Moulding apparatus for producing concrete mouldings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1223014A1 (en) * 2001-01-16 2002-07-17 Schlüsselbauer, Johann Apparatus for manufactoring annular concrete bodies
US6575724B2 (en) 2001-01-16 2003-06-10 Schluesselbauer Johann Apparatus for the production of ring-shaped bodies from concrete

Also Published As

Publication number Publication date
ES2033121T3 (en) 1993-03-01
DE68901691T2 (en) 1993-02-18
AT398185B (en) 1994-10-25
DE68901691D1 (en) 1992-07-09
ATE76800T1 (en) 1992-06-15
ATA170288A (en) 1994-02-15
EP0351325B1 (en) 1992-06-03

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