FR2668086A1 - Method and installation for moulding in a foundry of the consumable (disposable) pattern type - Google Patents

Method and installation for moulding in a foundry of the consumable (disposable) pattern type Download PDF

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Publication number
FR2668086A1
FR2668086A1 FR9012784A FR9012784A FR2668086A1 FR 2668086 A1 FR2668086 A1 FR 2668086A1 FR 9012784 A FR9012784 A FR 9012784A FR 9012784 A FR9012784 A FR 9012784A FR 2668086 A1 FR2668086 A1 FR 2668086A1
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France
Prior art keywords
plate
glue
face
tank
gluing
Prior art date
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FR9012784A
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French (fr)
Inventor
Henriques Bernard
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MOUSSEROLLES FONDERIES ATELIER
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MOUSSEROLLES FONDERIES ATELIER
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Priority to FR9012784A priority Critical patent/FR2668086A1/en
Publication of FR2668086A1 publication Critical patent/FR2668086A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B22C7/023—Patterns made from expanded plastic materials
    • B22C7/026—Patterns made from expanded plastic materials by assembling preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/526—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/757—Moulds, cores, dies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Assembly by adhesive bonding of the pattern made from expanded polystyrene in several parts. A plate 9 is loaded with adhesive in a tank 10, its face to which adhesive has been applied is scraped and then smoothed by means of a scraping device 11 with two superposed scrapers 11a and 11b in order to retain only a film of adhesive of specific thickness. A half-shell contained in a movable mould 5 is coated with adhesive by contact with the plate 9, then brought close to the fixed mould 1 carrying the other half-shell for the assembly of the two half-shells. The pattern obtained has no bead of adhesive along the joining lines, which contributes to eliminating surface defects on the article moulded with the aid of such a pattern.

Description

La présente invention se rapporte à une installation et à un procédé de fonderie pour moulage de métaux et plus particulièrement au moulage du type à modèle perdu, selon lequel le modèle perdu réalisant la forme de l'article métallique à produire est constitué de deux ou plusieurs parties ou empreintes assemblées par collage selon un plan droit.The present invention relates to a foundry installation and method for molding metals and more particularly to molding of the lost model type, according to which the lost model realizing the shape of the metallic article to be produced consists of two or more parts or imprints assembled by gluing according to a straight plane.

Ce procédé permet de réaliser des pièces en forme compliquée beaucoup plus simplement que les procédés classiques.This process makes it possible to produce parts in complicated form much more simply than conventional processes.

L'inconvénient que l'on rencontre lors du collage des parties du modèle, par exemple en polystyrène expansé est dû au fait que le collage laisse des traces sur le modèle ainsi assemble, telles qu'un bourrelet de colle le long des lignes de jonction qui, se trouvant sur la face externe du modèle, conduit aux imperfections de surface sur la pièce produite à l'aide d'un tel modèle.The drawback encountered when gluing parts of the model, for example in expanded polystyrene is due to the fact that the gluing leaves traces on the model thus assembled, such as a bead of glue along the junction lines which, being on the external face of the model, leads to surface imperfections on the part produced using such a model.

La présente invention a pour objectif d'éviter un tel inconvénient par le contrôle très strict du mode d'encollage des surfaces à assembler.The present invention aims to avoid such a drawback by very strict control of the method of gluing the surfaces to be assembled.

L'installation selon l'invention est caractérisée par le dispositif d'assemblage par collage comportant une plaque d'encollage, un bac pour la colle, des moyens mécaniques pogrlever et descendre ladite plaque plongeant dans le bac, une platine supportée par le bâti du dispositif sur lequel sont placés deux blocs pour la saisie des empreintes à assembler et des moyens de réglage de l'épaisseur du film de colle présent sur une face de la plaque d'encollage à sa sortie du bac de colle, placés au-dessus du niveau de la colle.The installation according to the invention is characterized by the assembly device by gluing comprising a gluing plate, a container for the glue, mechanical means for lifting and lowering said plate dipping into the container, a plate supported by the frame of the device on which two blocks are placed for capturing the impressions to be assembled and means for adjusting the thickness of the glue film present on one face of the glue plate at its outlet from the glue tank, placed above the glue level.

Les moyens de réglage peuvent consister en un dispositif racleur composé de deux raclettes rectilignes et rigides à action conjuguée, dont les bords d'attaque ou lèvres sont situés l'un au-dessus de l'autre par rapport à la direction de la montée de la plaque d'encollage, l'action de deux lèvres permettant un double lissage du film de colle et éliminant ainsi tout effet d'entrainement dynamique superflu.The adjustment means may consist of a scraper device composed of two straight and rigid squeegees with combined action, the leading edges or lips of which are located one above the other with respect to the direction of rise of the gluing plate, the action of two lips allowing a double smoothing of the glue film and thus eliminating any superfluous dynamic training effect.

De préférence, le bord d'attaque de la raclette inférieure est muni d'une arête vive destinée à racler l'excès de colle transférée sur la plaque lors de sa plongée dans le bac, tandis que le bord d'attaque de la raclette supérieure est muni d'une face plane parallèle à la plaque d'encollage, l'écartement de ladite face par rapport à la plaque définissant par lissage l'épaisseur définitive du film de colle.
L'épaisseur définitive du film de colle sur la plaque prête à servir de support d'encollage est de l'ordre de 0,1 à 0,8 mm.Preferably, the leading edge of the lower squeegee is provided with a sharp edge intended to scrape off the excess glue transferred to the plate when it is immersed in the tank, while the leading edge of the upper squeegee is provided with a flat face parallel to the gluing plate, the spacing of said face relative to the plate defining by smoothing the final thickness of the adhesive film.
The final thickness of the adhesive film on the plate ready to serve as a glue support is of the order of 0.1 to 0.8 mm.

Selon une forme particulière de réalisation, le dispositif racleur se présente sous forme de deux lèvres en matériau rigide reliées à angle substantiellement droit.According to a particular embodiment, the scraper device is in the form of two lips of rigid material connected at substantially right angles.

La plaque est portée aux deux extrémités de son bord supérieur par un étrier actionné en montée et en descente par un vérin hydraulique par l'intermédiaire d'une tige.The plate is carried at the two ends of its upper edge by a stirrup actuated up and down by a hydraulic cylinder via a rod.

Deux blocs pour la saisie des empreintes de modèle sont placés de part et d'autre de l'étrier et un des deux blocs est muni de moyens mécaniques, tels que vérin, pour permettre la translation de ce bloc vers la face de la plaque munie du film d'épaisseur contrôlée.Two blocks for entering model impressions are placed on either side of the caliper and one of the two blocks is provided with mechanical means, such as a jack, to allow the translation of this block towards the face of the plate provided film of controlled thickness.

Les blocs sont de préférence munis d'empreintes correspondant aux empreintes du modèle à assembler et leur position réciproque est très précisément ajustée pour assurer une parfaite coincidence de plans droits des empreintes à assembler.The blocks are preferably provided with imprints corresponding to the imprints of the model to be assembled and their reciprocal position is very precisely adjusted to ensure perfect coincidence of straight planes of the imprints to be assembled.

Le procédé pour la mise. en oeuvre de l'installation décrite précédemment est caractérisé par les opérations suivantes. Les blocs portant les empreintes étant écartés et la plaque d'encollage étant plongée dans le bac de colle, on remonte la plaque chargée de colle, tandis que les raclettes assurent le contrôle de l'épaisseur du film de colle, on fait approcher jusqu'à la mise en contact une empreinte vers la face chargée de colle de la plaque,.puis on fait reculer l'empreinte. oh abaisse la plaque pour la plonger dans le bac de colle et on approche pour appliquer l'empreinte à face encollée de l'autre empreinte fixe, on maintient en serrant les deux empreintes l'une contre l'autre et on démoule les empreintes ainsi assemblées.The process for placing. the installation described above is characterized by the following operations. The blocks bearing the imprints being separated and the gluing plate being immersed in the glue tank, we go up the plate loaded with glue, while the squeegees ensure the control of the thickness of the glue film, we approach until upon contacting an imprint towards the adhesive-laden face of the plate,. then the imprint is made to move back. oh lower the plate to immerse it in the glue tank and we approach to apply the impression with glued face of the other fixed impression, we maintain by tightening the two impressions against each other and we unmold the impressions as well assemblies.

L'invention sera illustrée plus en détail par un mode de réalisation d'une installation présentée à titre d'exemple sur les dessins annexes, dont
la figure 1 présente l'ensemble de l'installation d'encollage et d'assemblage de demi-coquilles en polystyrène expansé selon l'invention
la figure 2 présente schématiquement le dispositif de chargement et de répartition de colle sur la plaque d'encollage.The invention will be illustrated in more detail by an embodiment of an installation presented by way of example in the accompanying drawings, of which
Figure 1 shows the entire installation of gluing and assembly of expanded polystyrene half-shells according to the invention
FIG. 2 schematically shows the device for loading and distributing glue on the gluing plate.

Sur le bâti de la machine est montée sur des colonnes une platine 12 qui sert de support de guidage aux deux blocs: un moule fixe 1 et un moule mobile 5, les deux moules présentant des empreintes correspondant aux empreintes de deux demi-coquilles constituant le modèle en polystyrène expansé. On the machine frame is mounted on columns a plate 12 which serves as a guide support for the two blocks: a fixed mold 1 and a movable mold 5, the two molds having imprints corresponding to the imprints of two half-shells constituting the expanded polystyrene model.

Le moule mobile 5 porte une tige de vérin 6 servant à assurer la translation du moule mobile vers le moule fixe l. The movable mold 5 carries a jack rod 6 serving to ensure the translation of the movable mold towards the fixed mold l.

Entre la platine 12 et le fond du bâti, est placé un bac à colle 10 de forme parallélipipédique, de préférence sous forme d'une carouche interchangeable glissant sur des rails de guidage 7.Between the plate 12 and the bottom of the frame, a glue tank 10 of parallelepiped shape is placed, preferably in the form of an interchangeable cartridge sliding on guide rails 7.

La plaque d'encollage 9 est destinée à plonger dans le bac lu, puis à être relevée à l'aide d'un mécanisme de vérin dont-la tige 4 est solidaire d'un ensemble constitué par un étrier 16 relié par deux colonnes 3 à une plaque transversale 2 prenant appui sur la platine 12, ladite plaque 2 faisant corps avec la plaque d'encollage 9.The sizing plate 9 is intended to immerse in the tank read, then to be raised using a jack mechanism whose rod 4 is integral with an assembly constituted by a stirrup 16 connected by two columns 3 to a transverse plate 2 bearing on the plate 12, said plate 2 forming one body with the gluing plate 9.

En face arrière de la plaque d'encollage (face inactive), une lèvre 8 racle l'excédent de la colle. En face avant (face active) est placé un dispositif racleur 11 fixe monté au dessous de la platine 12 et au dessus du niveau de la colle dans le bac 10 au moyen d'un support 18 susceptible d'un déplacement horizontal servant à régler l'espacement par rapport à la plaque 9.On the rear face of the gluing plate (inactive face), a lip 8 scrapes off the excess glue. On the front face (active face) is placed a fixed scraper device 11 mounted below the plate 12 and above the level of the adhesive in the tank 10 by means of a support 18 capable of horizontal displacement serving to adjust the spacing from plate 9.

Le dispositif racleur 11 est composé de deux raclettes lla et rectilignes et rigides, placées une au dessus de l'autre et reliées entre elles à angle droit.The scraper device 11 is composed of two squeegees 11a and rectilinear and rigid, placed one above the other and connected together at a right angle.

Le bord 21a de la raclette inférieure lla présente une arête vive tournée en direction de la plaque et qui est destinée à racler l'excès de la colle transférée sur la plaque lors de sa plongée dans le bac, tandis que le bord 21b de la raclette supérieure llb est muni d'une face plane parallèle à la plaque 9 pour assurer le lissage du film de colle à la valeur d'épaisseur du film prédéterminée par le réglage de l'espacement du dispositif 11 par rapport à la plaque 9 au moyen du support mobile 18.The edge 21a of the lower squeegee 11a has a sharp edge facing the plate and which is intended to scrape off the excess glue transferred to the plate when it is immersed in the tank, while the edge 21b of the squeegee upper llb is provided with a flat face parallel to the plate 9 to ensure the smoothing of the adhesive film at the film thickness value predetermined by adjusting the spacing of the device 11 relative to the plate 9 by means of the mobile support 18.

En fonctionnement, l'opération débute lorsque les deux blocs 1 et 5 portant les empreintes sont écartés et la plaque 9 est plo#ngée dans le bac 10. In operation, the operation begins when the two blocks 1 and 5 carrying the imprints are separated and the plate 9 is placed in the tray 10.

On fait monter la plaque d'encollage chargée de colle au moyen du .vérin solidaire de la tige 4. Au cours de ce mouvement vertical, la lèvre 8 racle le mieux possible la colle de la face arrière de la plaque, tandis que le dispositif racleur 11 entre en fonction pour ajuster l'épaisseur du film à la valeur voulue.The glue plate loaded with glue is raised by means of the cylinder fixed to the rod 4. During this vertical movement, the lip 8 scrapes the glue as best as possible from the rear face of the plate, while the device scraper 11 comes into operation to adjust the thickness of the film to the desired value.

Au passage de la lèvre inférieure Ila, l'épaisseur du film de colle 15 est réduite de la plus grande partie du surplus de colle. Au passage devant la lèvre supérieure llb, on ramène l'épaisseur à la valeur désirée. La première lèvre travaille selon une arête vive pour avoir un effet coupant sur le film de colle et la deuxième lèvre lisse le film en présentant un plan parallèle au film.When the lower lip Ila passes, the thickness of the adhesive film 15 is reduced by most of the excess adhesive. When passing in front of the upper lip 11b, the thickness is reduced to the desired value. The first lip works along a sharp edge to have a cutting effect on the adhesive film and the second lip smoothes the film by presenting a plane parallel to the film.

L'excès de colle restant entre les deux lèvres s'écoule alors par les côtés.The excess glue remaining between the two lips then drains from the sides.

Une fois la plaque 9 en position haute, l'épaisseur du film de colle se situant entre 0,1 et 0,8 mm, le moule mobile 5 s'avance jusqu'à ce que l'empreinte en polystyrène expansé qu'il contient soit en contact avec la face de la plaque 9 et vienne se charger de colle par transfert. Ainsi, l'empreinte à encoller se charge uniquement de la quantité de colle nécessaire, quantité correspondant à l'épaisseur du film de colle restant sur la plaque.Once the plate 9 in the high position, the thickness of the adhesive film being between 0.1 and 0.8 mm, the movable mold 5 advances until the imprint of expanded polystyrene it contains either in contact with the face of the plate 9 and comes to load adhesive by transfer. Thus, the imprint to be bonded is only responsible for the quantity of adhesive required, an amount corresponding to the thickness of the adhesive film remaining on the plate.

une fois l'empreinte du moule mobile encollée, le moule mobile recule jusqu'à sa position initiale. Pendant ce mouvement de retrait, la demicoquille est maintenue dans l'empreinte du moule par aspiration, afin d'éviter que celleci ne reste collée sur la plaque au lieu de suivre le moule.once the imprint of the mobile mold is glued, the mobile mold moves back to its initial position. During this withdrawal movement, the half-shell is held in the mold cavity by suction, in order to prevent it from sticking to the plate instead of following the mold.

Lorsque le moule est revenu à sa position initiale, la plaque d'encollage descend et revient tremper dans la colle.When the mold has returned to its initial position, the sizing plate descends and returns to soak in the glue.

Lorsque la plaque 9 se trouve en position basse, le moule 5 avance de nouveau et cette fois jusqu'à ce qu'il soit en contact avec l'empreinte contenue dans le moule fixe 1. On maintient les deux parties en contact le temps nécessaire à assurer une prise suffisante.When the plate 9 is in the low position, the mold 5 advances again and this time until it is in contact with the imprint contained in the fixed mold 1. The two parts are kept in contact for the necessary time to ensure sufficient grip.

Le collage fini, le moule mobile revient en position initiale et l'on peut extraire le modèle en polystyrène expansé ainsi assemblé par collage. When the collage is finished, the movable mold returns to the initial position and the expanded polystyrene model can be extracted thus assembled by bonding.

Grâce à l'utilisation d'une quantité dosée de colle et répartie de façon homogène sur les parties de l'empreinte à encoller, on réalise un collage de bonne qualité, tout en évitant l'apparition d'un bourrelet le long de lignes de jonction.Thanks to the use of a metered quantity of glue and distributed homogeneously over the parts of the impression to be glued, a good quality bonding is achieved, while avoiding the appearance of a bead along the lines of junction.

L'invention n'est pas limitée au mode de réalisation décrit ci-dessus, elle est susceptible de certaines variantes à la portée de l'homme de l'art, notamment en ce qui concerne la matière du modèle, celui-ci pouvant être en polystyrène expansé, en cire perdue ou autre matière appropriée. The invention is not limited to the embodiment described above, it is capable of certain variants within the reach of ordinary skill in the art, in particular with regard to the material of the model, which may be made of expanded polystyrene, lost wax or other suitable material.

Claims (9)

REVENDICATIONS 1. Installation de fonderie pour moulage de métaux du type à modèle perdu1. Foundry installation for molding of metals of the lost pattern type dans lequel le modèle perdu réalisant la forme de l'article métallique in which the lost model realizing the shape of the metallic article à produire est constitué en deux ou plusieurs parties ou empr#eintes to be produced is made up of two or more parts or prints assemblées par collage selon un plan droit, caractérisée par le dispo assembled by gluing along a straight plane, characterized by the availability sitif d'assemblage par collage comportant une plaque d'encollage (9), assembly sitive by gluing comprising a gluing plate (9), un bac pour la colle (10), des moyens mécaniques (3, 4) pour lever et a glue tank (10), mechanical means (3, 4) for lifting and descendre ladite plaque plongeant dans le bac, une-platine (12) suppor lower said plate dipping into the tank, a-plate (12) suppor tée par le bâti du dispositif sur lequel sont placés deux blocs (l, 5) ted by the frame of the device on which two blocks are placed (l, 5) pour la saisie des empreintes à assembler et des moyens de réglage (11) for entering impressions to be assembled and adjustment means (11) de l'épaisseur du film de colle (15) présent sur une face de la plaque the thickness of the adhesive film (15) present on one face of the plate d'encollage (9) à sa sortie du bac de colle (10), placés au-dessus du glue (9) at its exit from the glue tank (10), placed above the niveau de la colle. glue level. 2. Installation selon la revendication 1, caractérisée en ce que lesdits2. Installation according to claim 1, characterized in that said moyens de réglage consistent-en un dispositif racleur (11) composé de adjustment means consist of a scraper device (11) composed of deux raclettes (1 la, llb) rectilignes et rigides à action conjuguée, two straight and rigid squeegees (1 la, llb) with combined action, dont les bords d'attaque ou lèvres (21a, 21b) sont situés l'un au-dessus the leading edges or lips (21a, 21b) of which are located one above de l'autre par rapport à la direction de la montée de la plaque on the other relative to the direction of the plate rise d'encollage (9), l'action de deux lèvres permettant un double lissage du size (9), the action of two lips allowing a double smoothing of the film de colle et éliminant ainsi tout effet d'entraînement dynamique adhesive film and thus eliminating any dynamic ripple effect superflu. superfluous. 3. Installation selon la revendication 2, caractérisée en ce que le bord3. Installation according to claim 2, characterized in that the edge d'attaque (21a) de la raclette inférieure (lla) est muni d'une arête attack (21a) of the lower squeegee (lla) is provided with an edge vive destinée à racler l'excès de colle transférée sur la plaque lors sharp to scrape off the excess glue transferred to the plate during de sa plongée dans le bac, tandis que le bord d'attaque (21b) of its diving in the tank, while the leading edge (21b) de la raclette supérieure (lob) est muni d'une face plane parallèle of the upper squeegee (lob) is provided with a parallel flat face à la plaque d'encollage (9), l'écartement de ladite face par rapport à to the gluing plate (9), the spacing of said face relative to la plaque (9) définissant par lissage l'épaisseur définitive du film the plate (9) defining by smoothing the final thickness of the film de colle (15). glue (15). 4. Installation selon l'une des revendications 1 à 3, caractérisée en4. Installation according to one of claims 1 to 3, characterized in ce que l'épaisseur définitive du film de colle (15) sur la plaque prête à servir de support d'encollage est desl'ordre de 0,1 à  that the final thickness of the glue film (15) on the plate ready to serve as a glueing support is from 0.1 to 0,8 mm. 0.8 mm. 5. Installation selon lrune des revendications 1 à 4, caractérisée en5. Installation according to one of claims 1 to 4, characterized in ce que le dispositif racleur (11) se présente sous forme de deux that the scraper device (11) is in the form of two lèvres (1 la, llb) en matériau rigide reliées à angle substantielle  lips (1 la, llb) of rigid material connected at substantial angle ment droit. right. 6. Installation selon l'une des revendications 1 à 5, caractérisée en6. Installation according to one of claims 1 to 5, characterized in ce qu'aux deux extrémités de son bord supérieur, la plaque est por that at the two ends of its upper edge, the plate is por tée par un étrier (16) actionné en montée et en descente par un vérin ted by a stirrup (16) actuated up and down by a jack hydraulique par l'intermédiaire d'une tige (4). hydraulic by means of a rod (4). 7. Installation selon l'une des revendications 1 à 6, caractérisée7. Installation according to one of claims 1 to 6, characterized en ce que les blocs (1,5) pour la saisie des empreintes de modèle in that the blocks (1,5) for entering the model impressions sont placés de part et dtautre de l'étrier (16) et un des deux blocs are placed on either side of the bracket (16) and one of the two blocks (5) est muni de moyens mécaniques, tels que vérin, pour permettre (5) is provided with mechanical means, such as a jack, to allow la translation de ce bloc vers la face de la plaque (9) munie du the translation of this block towards the face of the plate (9) provided with the film (15) à épaisseur contrôlée. film (15) with controlled thickness. 8. Installation selon la revendication 7, caractérisée en ce que les8. Installation according to claim 7, characterized in that the blocs (1,5) sont munis d'empreintes correspondant aux empreintes blocks (1,5) have imprints corresponding to the imprints du modèle à assembler par collage et leur position réciproque est of the model to be assembled by gluing and their reciprocal position is très précisément ajustée pour assurer une parfaite coincidence de very precisely adjusted to ensure perfect coincidence of plans droits des empreintes à assembler. straight shots of the imprints to be assembled. 9. Procédé pour la mise en oeuvre de l'installation selon les revendi 9. Method for implementing the installation as claimed cations 1 à 8, caractérisé par les opérations suivantes: cations 1 to 8, characterized by the following operations: - les blocs (1,5) portant les empreintes étant écartés etla plaque - the blocks (1,5) carrying the imprints being separated and the plate d'encollage (9) étant plongée dans le bac de colle (lu?,  glue (9) being immersed in the glue tank (read ?, - la remontée de la plaque d'encollage chargée de colle, au cours - the rise of the glue plate loaded with glue, during de laquelle remontée les raclettes (lla,llb)-assurent le contrôle from which the squeegees (lla, llb) rise - provide control précis de l'épaisseur du film de colle (15), precise thickness of the adhesive film (15), - approche avec contact d'une empreinte (5) vers la face chargée - approach with contact of an imprint (5) towards the loaded face de colle de la plaque et recul de l'empreinte, glue from the plate and receding of the imprint, - abaissement de la plaque (9) pour la plongée dans le bac (10) et - lowering of the plate (9) for diving into the tank (10) and - approche avec application de pression de l'empreinte (5) à face - approach with pressure application of the impression (5) on the face encollée vers l'empreinte fixe (1), puis démoulage des empreintes glued to the fixed impression (1), then release of the impressions de modèle assemblées.  of model assembled.
FR9012784A 1990-10-17 1990-10-17 Method and installation for moulding in a foundry of the consumable (disposable) pattern type Withdrawn FR2668086A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665261A2 (en) * 1994-01-31 1995-08-02 METZELER Automotive Profiles GmbH Process for making butt-joints for profiled elastomeric elements
FR3004974A1 (en) * 2013-04-30 2014-10-31 Peugeot Citroen Automobiles Sa SLEEPING DEVICE WITH SELF-ADAPTIVE STICK MASK FOR LOST MODEL FOUNDING PROCESS
CN111617930A (en) * 2019-08-02 2020-09-04 郑军锋 Novel lamp shade inside lining veneer compress tightly device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE381239C (en) * 1922-06-23 1923-09-17 Willy Hagen Glue application machine
FR2321951A1 (en) * 1975-08-26 1977-03-25 Inventing Ab METHOD AND APPARATUS FOR APPLYING A COATING ON A CONTINUOUS SHEET IN MOTION
GB2154906A (en) * 1984-02-27 1985-09-18 Outboard Marine Corp Lost foam pattern assembly equipment
DE3902599A1 (en) * 1988-01-29 1989-08-03 Valmet Paper Machinery Inc DEVICE FOR COATING A PAPER COATING WITH A COATING MEASUREMENT
US4963213A (en) * 1989-07-31 1990-10-16 Morikawa Snagyo Kabushiki Kaisha Method of and device for gluing objects together using a porous sheet applicator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE381239C (en) * 1922-06-23 1923-09-17 Willy Hagen Glue application machine
FR2321951A1 (en) * 1975-08-26 1977-03-25 Inventing Ab METHOD AND APPARATUS FOR APPLYING A COATING ON A CONTINUOUS SHEET IN MOTION
GB2154906A (en) * 1984-02-27 1985-09-18 Outboard Marine Corp Lost foam pattern assembly equipment
DE3902599A1 (en) * 1988-01-29 1989-08-03 Valmet Paper Machinery Inc DEVICE FOR COATING A PAPER COATING WITH A COATING MEASUREMENT
US4963213A (en) * 1989-07-31 1990-10-16 Morikawa Snagyo Kabushiki Kaisha Method of and device for gluing objects together using a porous sheet applicator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665261A2 (en) * 1994-01-31 1995-08-02 METZELER Automotive Profiles GmbH Process for making butt-joints for profiled elastomeric elements
EP0665261A3 (en) * 1994-01-31 1995-09-13 Metzeler Automotive Profiles
FR3004974A1 (en) * 2013-04-30 2014-10-31 Peugeot Citroen Automobiles Sa SLEEPING DEVICE WITH SELF-ADAPTIVE STICK MASK FOR LOST MODEL FOUNDING PROCESS
CN111617930A (en) * 2019-08-02 2020-09-04 郑军锋 Novel lamp shade inside lining veneer compress tightly device
CN111617930B (en) * 2019-08-02 2021-06-18 涂腾 Lampshade lining gluing and pressing device

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