EP0470021B1 - Method for realization of castings of aluminium or its alloys with integrated runners - Google Patents

Method for realization of castings of aluminium or its alloys with integrated runners Download PDF

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Publication number
EP0470021B1
EP0470021B1 EP91420284A EP91420284A EP0470021B1 EP 0470021 B1 EP0470021 B1 EP 0470021B1 EP 91420284 A EP91420284 A EP 91420284A EP 91420284 A EP91420284 A EP 91420284A EP 0470021 B1 EP0470021 B1 EP 0470021B1
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EP
European Patent Office
Prior art keywords
tube
tubes
process according
mould
aluminium
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EP91420284A
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German (de)
French (fr)
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EP0470021A1 (en
Inventor
Eric Darsy
Philippe Meyer
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Montupet SA
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Montupet SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads

Definitions

  • the invention relates to a process for producing castings of Al or its alloys according to the preamble of claim 1.
  • One (or more) main tube (s) of aluminum or one of its alloys previously shaped (s) and optionally provided with one or more several nozzles are (are) placed in the mold, in a determined position, the open ends of the tubes being able to correspond with the outside of the mold, either through the latter or through cores; closed ends can be embedded in the room.
  • the positioning of the tube (or of the tube system) in the mold ensures its centering in relation to its reference position, offers the possibility of axial expansion of the tubes and their rotation blocking.
  • the alloy of the part is then poured into the cavity of the mold after closing it; to drown the tube or tube system.
  • the penetration depth of a nozzle in the main tube is of the order of 1 mm relative to its internal surface. This positioning is fixed by the Position of the collar in case a) or by external longitudinal grooving by pushing back the end of the adjustment in case b). In the latter case, the extra thicknesses obtained on the diameter then ensure lateral tightening and the end beads of the grooves ensure the axial positioning of the fitting on the tube.
  • the positioning of the tube (or the tube system) in the mold is for example carried out by a 90 ° elbow, external to the useful part of the molded part and inserted in a core adjacent to the mold with a clearance of the order of 1 to 2 mm, for an overall length of approximately 50 cm.
  • the other end of the tube is inserted into a cylindrical housing core allowing free axial expansion of the tube but also ensuring perfect centering of the tube system in the mold.
  • the mold itself is made either of sand, or of metal, or mixed, under the usual conditions for the casting of aluminum alloys.
  • the alloys usually used are AS7G or AS5U3G in states Y20,23 or Y30, 33 according to the AFNOR standard NF-A-57702.
  • the center-to-center dimensions of the nozzles will be corrected, in relation to the desired dimensions, by a coefficient taking into account the deformations of the main tube during casting and the solidification of the part: namely elongation under the effect of the heat of the liquid metal and shrinkage when the part solidifies.
  • the casting temperature of the part is the lowest temperature allowing the good coming of the part and the non-melting of the tube.
  • the casting temperature is less than or equal to 760 ° C and preferably between 720 ° C and 740 ° C.
  • the usual internal diameters of the tubes used are generally between 3 and 15 mm.
  • the contact time between the tube system and the molten metal must be less than 10 seconds, and preferably 5 seconds.
  • the tube (or tube system) can also be cooled during the casting operation by the circulation of a cooling fluid, such as compressed air or liquid nitrogen vapor. .
  • a cooling fluid such as compressed air or liquid nitrogen vapor.
  • FIGS. 1 to 3 reproducing the conditions for casting a part of the cylinder head.
  • Figure 1 shows a sectional view of a tube and its tappings in place in a casting mold, in elevation (1A) along line II-II of fig.1B and in plan (1B) along line II of fig. 1A.
  • Figure 2 shows in section the detail of the junction of a tapping on the main tube using a shaped and glued flange (fig.2A to 2D) at different stages of shaping.
  • Figure 3 shows the detail of the junction of a nozzle on the main tube by press fitting, Figure 3A being an elevation view of a nozzle, fig.3B an end view and fig.3C, a axial section of the force fitting obtained.
  • the nozzles are provided with a collar 7, shaped and glued to the main tube 1 using a cyanoacrylic adhesive 10 (Black Max from the company "LOCTITE").
  • the main tube 1 has an end bend 8 placed in the part 9 of the mold 3, with a clearance 12 of between 1 and 2 mm, which makes it possible to precisely position the tube (1) provided with its tappings in the mold 3
  • the other flattened end 13 of the tube 1, 50 cm long, is straight and can slide in the part 10 of the mold 3 (free thermal expansion towards the outside of the mold).
  • the flanges are obtained by axial crushing of the tube 2 constituting the nozzles (fig.2A, B and C) and after shaping, these are glued to the tube 1 (fig.2D).
  • the penetration of the nozzle into the tube takes place over a length 1 of the order of mm.
  • an AS5U3G alloy is poured into the cavity 11 at a temperature of 730 ° C. and at a speed of 120 l / minute.
  • the part with its integrated channel system is removed from the mold, which is then rid of unnecessary excess lengths, 8 and 13, for example.
  • the tube is then chamfered over a length b of the order of mm, then force-fitted into the opening 23 of the tube 1 until the beads 22 serving as a stop provide the desired depth of penetration 1.
  • the method according to the invention makes it possible to obtain parts having a system of internal channels which can have a complex design, without resorting to precise and long machining on specialized machines, and without having to plug the outputs of the machined channels which are unnecessary in service and simply required by the drilling steps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Continuous Casting (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Automatic Assembly (AREA)
  • Golf Clubs (AREA)
  • Powder Metallurgy (AREA)
  • Valve Housings (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Body Structure For Vehicles (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The invention relates to a method for production of castings of aluminium or its alloys comprising integrated runners intended for the distribution of a lubricant or for the circulation of a heat-exchange fluid. <??>The method is characterised in that:   - one or more previously shaped tubes of aluminium or aluminium alloys are placed in a mould, the ends of the tube or tubes being outside the mould or the cores inserted therein;   - the alloy is poured into the cavity of the mould;   - after removal from the mould, the excess parts of the tube or tubes are removed. <??>This method applies to the mass-production of castings having a system of internal runners, such as cylinder heads, compressor cylinders, lubrication systems, convectors, etc. <IMAGE>

Description

L'invention concerne un procédé de réalisation de pièces moulées en Al ou ses alliages selon le préambule de la revendication 1.The invention relates to a process for producing castings of Al or its alloys according to the preamble of claim 1.

Elle s'applique en particulier à la fabrication de culassesIt applies in particular to the manufacture of cylinder heads

On connaît un procédé de ce type décrit dans les demandes japonaises JA-55-73455 et JA-55-68168 dans lesquelles un tube métallique rempli de sable ou de matériau analogue est noyé dans une pièce moulée. Après solidification le sable est éliminé. Cependant, cette méthode présente les désavantages suivants :

  • avant coulée, il faut remplir les tubes avec du sable ce qui constitue une opération supplémentaire et délicate, surtout si les tubes sont étroits et tortueux;
  • après coulée, il faut éliminer le sable contenu à l'intérieur des canaux, ce qui peut être difficile si les canaux sont étroits et tortueux;
  • des grains de sable peuvent ne pas être éliminés en restant accrochés aux parois internes du tube, ce qui peut induire des inconvénients si ceux-ci sont entraînés par la suite dans les circuits d'utilisation (de lubrifiant ou de refroidissement);
  • difficultés à réfrigérer les tubes en cours de coulée.
A method of this type is known, described in Japanese applications JA-55-73455 and JA-55-68168 in which a metal tube filled with sand or similar material is embedded in a molded part. After solidification the sand is removed. However, this method has the following disadvantages:
  • before casting, it is necessary to fill the tubes with sand which constitutes an additional and delicate operation, especially if the tubes are narrow and tortuous;
  • after casting, it is necessary to remove the sand contained inside the channels, which can be difficult if the channels are narrow and tortuous;
  • grains of sand may not be eliminated by remaining attached to the internal walls of the tube, which can cause drawbacks if these are subsequently entrained in the circuits of use (lubricant or cooling);
  • difficulties in refrigerating the tubes during casting.

La demanderesse, voulant éliminer ces inconvénients, a donc mis au point la méthode suivante selon l'invention.The Applicant, wishing to eliminate these drawbacks, has therefore developed the following method according to the invention.

Un (ou plusieurs) tube(s) principal(aux) en aluminium ou un de ses alliages préalablement conformé(s) et éventuellement muni(s) d'un ou plusieurs piquages est (sont) placé(s) dans le moule, dans une position déterminée, les extrémités ouvertes des tubes pouvant correspondre avec l'extérieur du moule, soit au travers de celui-ci, soit au travers de noyaux ; les extrémités fermées peuvent être noyées dans la pièce.One (or more) main tube (s) of aluminum or one of its alloys previously shaped (s) and optionally provided with one or more several nozzles are (are) placed in the mold, in a determined position, the open ends of the tubes being able to correspond with the outside of the mold, either through the latter or through cores; closed ends can be embedded in the room.

Le positionnement du tube (ou du système de tubes) dans le moule assure son centrage par rapport à sa position de référence, offre la possibilité de dilatation axiale des tubes et le blocage en rotation de ceux-ci.The positioning of the tube (or of the tube system) in the mold ensures its centering in relation to its reference position, offers the possibility of axial expansion of the tubes and their rotation blocking.

L'alliage de la pièce est alors coulé dans la cavité du moule après fermeture de celui-ci ; pour noyer le tube ou système de tubes.The alloy of the part is then poured into the cavity of the mold after closing it; to drown the tube or tube system.

L'alliage constituant les tubes ainsi que leurs épaisseurs sont déterminés de façon à éviter toutes fusions locales lors du remplissage du moule par l'alliage liquide. D'une façon générale, il est préconisé l'utilisation d'un tube en A5 (Norme AFNOR-NF-57702) d'épaisseur supérieur ou égale à 1 mm. Les rayons de cintrage des tubes ne doivent pas engendrer dans la fibre tendue des coudes des amincissements trop importants, incompatibles avec la tenue du tube au moment du remplissage; de préférence le rayon de cintrage est supérieur ou égal à 3 fois le diamètre externe des tubes.

  • Les piquages sont fixés sur le tube principal :
    • a) soit par des collerettes, obtenues par écrasement axial du tube et conformées au diamètre externe du tube principal. La fixation a lieu alors par collage ou soudage. Le positionnement est donné par la collerette et l'ajustement du piquage dans le tube principal (fig. 2) ;
    • b) soit par emmanchement à force de l'extrémité chanfreinée du piquage dans un orifice du tube principal avec un serrage positif allant jusqu'à 0,5 mm. Le positionnement est donné par l'extrémité des rainures longitudinales des piquages assurant le serrage latéral (fig. 3) ;
    • c) soit par soudage direct.
The alloy constituting the tubes and their thicknesses are determined so as to avoid any local fusions during filling of the mold with the liquid alloy. In general, the use of an A5 tube (AFNOR-NF-57702 standard) with a thickness greater than or equal to 1 mm is recommended. The bending radii of the tubes must not generate excessive thinnings in the stretched fiber of the elbows, incompatible with the strength of the tube at the time of filling; preferably the bending radius is greater than or equal to 3 times the external diameter of the tubes.
  • The nozzles are fixed on the main tube:
    • a) or by flanges, obtained by axial crushing of the tube and shaped to the external diameter of the main tube. The fixing then takes place by gluing or welding. The positioning is given by the collar and the adjustment of the nozzle in the main tube (fig. 2);
    • b) or by force fitting the chamfered end of the tapping into an opening in the main tube with a positive clamping of up to 0.5 mm. The positioning is given by the end of the longitudinal grooves of the nozzles ensuring the lateral tightening (fig. 3);
    • c) either by direct welding.

La profondeur de pénétration d'un piquage dans le tube principal est de l'ordre de 1 mm par rapport à sa surface interne. Ce positionnement est fixé par la Position de la collerette dans le cas a) soit par rainurage longitudinal externe par repoussage de l'extrémité de l'ajustage dans le cas b). Dans ce dernier cas, les surépaisseurs obtenues sur le diamètre assurent alors le serrage latéral et les bourrelets d'extrémité des rainures assurent le positionnement axial de l'ajustage sur le tube.The penetration depth of a nozzle in the main tube is of the order of 1 mm relative to its internal surface. This positioning is fixed by the Position of the collar in case a) or by external longitudinal grooving by pushing back the end of the adjustment in case b). In the latter case, the extra thicknesses obtained on the diameter then ensure lateral tightening and the end beads of the grooves ensure the axial positioning of the fitting on the tube.

Le Positionnement du tube (ou du système de tube) dans le moule est par exemple réalisé par un coude à 90°, externe à la partie utile de la pièce moulée et inséré dans un noyau adjacent au moule avec un jeu de l'ordre de 1 à 2 mm, pour une longueur hors tout de 50 cm environ. L'autre extrémité du tube est insérée dans un noyau à logement cylindrique permettant la libre dilatation axiale du tube mais assurant par ailleurs, un parfait centrage du système de tubes dans le moule. Le moule lui-même est réalisé soit en sable, soit en métal, soit mixte, dans les conditions habituelles pour la coulée des alliages d'aluminium. Les alliages habituellement utilisés sont les AS7G ou AS5U3G aux états Y20,23 ou Y30, 33 suivant la norme AFNOR NF-A-57702.The positioning of the tube (or the tube system) in the mold is for example carried out by a 90 ° elbow, external to the useful part of the molded part and inserted in a core adjacent to the mold with a clearance of the order of 1 to 2 mm, for an overall length of approximately 50 cm. The other end of the tube is inserted into a cylindrical housing core allowing free axial expansion of the tube but also ensuring perfect centering of the tube system in the mold. The mold itself is made either of sand, or of metal, or mixed, under the usual conditions for the casting of aluminum alloys. The alloys usually used are AS7G or AS5U3G in states Y20,23 or Y30, 33 according to the AFNOR standard NF-A-57702.

Les cotes d'entraxe des piquages seront corrigées, pa rapport aux cotes souhaitées, d'un coefficiednt tenant compte des déformations du tube principal lors de la coulée et de la solidification de la pièce : à savoir allongement sous l'effet de la chaleur du métal liquide et retrait au moment de la solidification de la pièce.The center-to-center dimensions of the nozzles will be corrected, in relation to the desired dimensions, by a coefficient taking into account the deformations of the main tube during casting and the solidification of the part: namely elongation under the effect of the heat of the liquid metal and shrinkage when the part solidifies.

La température de coulée de la pièce est la température la plus faible permettant d'obtenir la bonne venue de la pièce et la non fusion du tube. La température de coulée est inférieure ou égale à 760° C et de préférence comprise entre 720° C et 740° C.The casting temperature of the part is the lowest temperature allowing the good coming of the part and the non-melting of the tube. The casting temperature is less than or equal to 760 ° C and preferably between 720 ° C and 740 ° C.

A titre indicatif, les diamètres internes usuels des tubes utilisées sont généralement compris entre 3 et 15 mm.As a guide, the usual internal diameters of the tubes used are generally between 3 and 15 mm.

Il est préférable de choisir les alliages du tube ou système de tubes et de la pièce coulée de telle sorte que la température de fusion de l'alliage de la pièce moulée soit inférieure ou égale à celle du métal (ou alliage) constituant les tubes (ou système de tubes).It is better to choose the tube alloys or tube system and of the cast part so that the melting temperature of the alloy of the molded part is less than or equal to that of the metal (or alloy) constituting the tubes (or tube system).

Pendant la phase de remplissage, le temps de contact entre le système de tubes et le métal fondu doit être inférieur à 10 secondes, et de préférence 5 secondes.During the filling phase, the contact time between the tube system and the molten metal must be less than 10 seconds, and preferably 5 seconds.

Le tube (ou système des tubes) peu(ven)t aussi être refroidi(s) au cours de l'opération de coulée par une circulation d'un fluide de refroidissement, tel que l'air comprimé ou la vapeur d'azote liquide.The tube (or tube system) can also be cooled during the casting operation by the circulation of a cooling fluid, such as compressed air or liquid nitrogen vapor. .

L'invention sera mieux comprise à l'aide de l'exemple suivant, illustré par les figures 1 à 3 et, reproduisant les conditions de coulée d'une partie de culasse.The invention will be better understood with the aid of the following example, illustrated by FIGS. 1 to 3 and, reproducing the conditions for casting a part of the cylinder head.

La figure 1 représente une vue en coupe d'un tube et de ses piquages en place dans un moule de coulée, en élévation (1A) selon la ligne II-II de la fig.1B et en plan (1B) selon la ligne I-I de la fig.1A.Figure 1 shows a sectional view of a tube and its tappings in place in a casting mold, in elevation (1A) along line II-II of fig.1B and in plan (1B) along line II of fig. 1A.

Par souci de clarté des dessins le système d'alimentation de la pièce coulée en gravité n'est pas représenté.For the sake of clarity of the drawings, the feed system for the gravity casting is not shown.

La figure 2 montre en coupe le détail de la jonction d'un piquage sur le tube principal à l'aide d'une collerette conformée et collée (fig.2A à 2D) à différentes étapes de conformation.Figure 2 shows in section the detail of the junction of a tapping on the main tube using a shaped and glued flange (fig.2A to 2D) at different stages of shaping.

La figure 3 représente le détail de la jonction d'un piquage sur le tube principal par emmanchement à force, la figure 3A étant une vue en élévation d'un piquage, la fig.3B une vue en bout et la fig.3C, une coupe axiale de l'emmanchement à force obtenu.Figure 3 shows the detail of the junction of a nozzle on the main tube by press fitting, Figure 3A being an elevation view of a nozzle, fig.3B an end view and fig.3C, a axial section of the force fitting obtained.

Un tube 1 muni de 3 piquages fermés 2 est placé dans un moule 3 constitué d'une partie inférieure 4 et d'une partie supérieure 5, s'appuyant entre elles par le plan de joint 6; le tube 1 a les dimensions suivantes : diamètre 12 X 8 mm et les piquages diamètre 6 X 4 mm. Le moule est constitué d'un mélange PET-SET de la societé "ASHLAND AVEBENE" dont la composition est :

  • silice 55AFA
  • isocyanate : 0,6% (en poids)
  • résine phénolique : 0,6% (en poids)
  • catalyseur PP 3/4 = 20% de la quantité de résine (en poids).
A tube 1 provided with 3 closed nozzles 2 is placed in a mold 3 consisting of a lower part 4 and an upper part 5, bearing between them by the joint plane 6; the tube 1 has the following dimensions: diameter 12 X 8 mm and the nozzles diameter 6 X 4 mm. The mold consists of a PET-SET mixture from the company "ASHLAND AVEBENE", the composition of which is:
  • 55AFA silica
  • isocyanate: 0.6% (by weight)
  • phenolic resin: 0.6% (by weight)
  • catalyst PP 3/4 = 20% of the quantity of resin (by weight).

Les piquages sont munis d'une collerette 7, conformée et collée sur le tube principal 1 à l'aide d'une colle 10 cyanoacrylique (Black Max de la societé "LOCTITE").The nozzles are provided with a collar 7, shaped and glued to the main tube 1 using a cyanoacrylic adhesive 10 (Black Max from the company "LOCTITE").

Le tube principal 1 possède un coude d'extrémité 8 placé dans la partie 9 du moule 3, avec un jeu 12 compris entre 1 et 2 mm, qui permet de positionner avec précision le tube (1) muni de ses piquages dans le moule 3. L'autre extrémité aplatie 13 du tube 1 de 50 cm de longueur, est droite et peut coulisser dans la partie 10 du moule 3 (libre dilatation thermique vers l'extérieur du moule).The main tube 1 has an end bend 8 placed in the part 9 of the mold 3, with a clearance 12 of between 1 and 2 mm, which makes it possible to precisely position the tube (1) provided with its tappings in the mold 3 The other flattened end 13 of the tube 1, 50 cm long, is straight and can slide in the part 10 of the mold 3 (free thermal expansion towards the outside of the mold).

Les collerettes sont obtenues par écrasement axial du tube 2 constituant les piquages (fig.2A, B et C) et après conformation, celles-ci sont collées sur le tube 1 (fig.2D).The flanges are obtained by axial crushing of the tube 2 constituting the nozzles (fig.2A, B and C) and after shaping, these are glued to the tube 1 (fig.2D).

La pénétration du piquage dans le tube a lieu sur une longueur 1 de l'ordre du mm.The penetration of the nozzle into the tube takes place over a length 1 of the order of mm.

Le tube 1 et ses piquages étant positionnés dans le moule 3, comme cela vient d'être décrit, on coule dans la cavité 11 un alliage AS5U3G à une température de 730°C et à une vitesse de 120 l/minute.The tube 1 and its tappings being positioned in the mold 3, as has just been described, an AS5U3G alloy is poured into the cavity 11 at a temperature of 730 ° C. and at a speed of 120 l / minute.

Après solidification, on démoule la pièce munie de son système de canaux intégrés, laquelle est ensuite débarrassée des surlongueurs inutiles, 8 et 13, par exemple.After solidification, the part with its integrated channel system is removed from the mold, which is then rid of unnecessary excess lengths, 8 and 13, for example.

Un autre mode de jonction du piquage 2 sur le tube 1 est représenté à la fig.3.Another method of joining the tap 2 on the tube 1 is shown in fig.3.

Il consiste à former par repoussage à l'extrémité du piquage des rainures longitudinales 20 sur sa face externe, ce qui forme de légers bourrelets longitudinaux 21 de hauteur a (environ 0,3 mm) et un bourrelet d'extrémité 22.It consists in forming, by pushing back, at the end of the stitching, longitudinal grooves 20 on its external face, which forms light longitudinal beads 21 of height a (about 0.3 mm) and an end bead 22.

Le tube est ensuite chanfreiné sur une longueur b de l'ordre du mm, puis emmanché à force dans l'ouverture 23 du tube 1 jusqu'à ce que les bourrelets 22 servant de butée assurent la profondeur de pénétration 1 recherchée.The tube is then chamfered over a length b of the order of mm, then force-fitted into the opening 23 of the tube 1 until the beads 22 serving as a stop provide the desired depth of penetration 1.

Le procédé selon l'invention permet d'obtenir des pièces ayant un système de canaux internes pouvant présenter un dessin complexe, sans recourir à un usinage précis et long sur machines spécialisées, et sans avoir à reboucher les sorties des canaux usinés inutiles en service et simplement exigées par les étapes de perçages.The method according to the invention makes it possible to obtain parts having a system of internal channels which can have a complex design, without resorting to precise and long machining on specialized machines, and without having to plug the outputs of the machined channels which are unnecessary in service and simply required by the drilling steps.

Ce procédé simple et peu coûteux est adaptable à la production en série de toutes sortes de pièces moulées telles que des culasses, des cylindres et valves de compresseurs, des systèmes de lubrification, des convecteurs, et...This simple and inexpensive process is suitable for mass production of all kinds of molded parts such as cylinder heads, compressor cylinders and valves, lubrication systems, convectors, and ...

Claims (16)

  1. Process for obtaining a moulded part made of Al or an Al alloy and containing integrated channels, in which
    - a tube (or system of tubes) (1) made of aluminium or an alloy thereof of thickness greater than or equal to 1 mm, which is previously formed, is placed in a mould (3) in a specified position, the ends of the tube (or system of tubes) being on the outside of the mould or of the cores inserted therein
    - the alloy of the part is poured into the cavity of the mould
    - after demoulding, the surplus portions of the tube (or of the system of tubes) are eliminated,
    characterised in that the tube (or the system of tubes) (1) is positioned prior to casting in the mould (1) in a perfectly centred manner with the possibility of axial expansion of the tubes and rotary blocking thereof.
  2. Process for casting according to claim 1, characterised in that the moulded part, made of aluminium or an aluminium alloy, is a cylinder head.
  3. Process according to either of claims 1 and 2, characterised in that the system of tubes is constituted by a tube (1) which may be equipped with one or more taps (2).
  4. Process according to claim 3, characterised in that the taps (2) are fixed on the tube (1) by collars which are formed (7) and stuck (10).
  5. Process according to claim 3, characterised in that the taps (2) are fixed on the tube (1) by press-fitting.
  6. Process according to claim 5, characterised in that the end of the tap (2) is equipped with longitudinal ribs (20) obtained by embossing before press-fitting.
  7. Process according to either of claims 5 and 6, characterised in that the diameter oversize is positive and may range up to 5/10 of a mm.
  8. Process according to one of claims 4 to 7, characterised in that the tap or taps (2) penetrate(s) into the tube (1).
  9. Process according to claim 8, characterised in that the penetration 1 is of the order of a mm.
  10. Process according to claims 1 to 9, characterised in that the positioning of the tube (or system of tubes) is achieved by an elbow at 90° (2), external to the useful portion of the moulded part (1), which is inserted into a core (9) external to the mould with a clearance (12) and by the flattened end (13) of the tube.
  11. Process according to one of claims 1 to 10, characterised in that during the casting of the part a cooling fluid is circulated in the tube (or system of tubes) (1).
  12. Process according to one of claims 1 to 11, characterised in that the melting point of the tube (or system of tubes) is higher than or equal to that of the cast alloy constituting the moulded part.
  13. Process according to one of claims 1 to 12, characterised in that the alloy constituting the tube (or system of tubes) is commercially pure aluminium (type A5).
  14. Process according to one of claims 1 to 3, characterised in that the casting temperature is less than 760°C.
  15. Process according to claim 14, characterised in that the casting temperature is between 720°C and 740°C.
  16. Process according to either of claims 14 and 15, characterised in that the contact time between the tube (or system of tubes) and the molten metal is less than 10 seconds, and preferably 5 seconds.
EP91420284A 1990-08-02 1991-07-31 Method for realization of castings of aluminium or its alloys with integrated runners Expired - Lifetime EP0470021B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010487 1990-08-02
FR9010487A FR2665384B1 (en) 1990-08-02 1990-08-02 PROCESS FOR PRODUCING A MOLDED PART IN AL OR ITS ALLOYS PROVIDED WITH INTEGRATED CHANNELS.

Publications (2)

Publication Number Publication Date
EP0470021A1 EP0470021A1 (en) 1992-02-05
EP0470021B1 true EP0470021B1 (en) 1995-06-28

Family

ID=9399743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420284A Expired - Lifetime EP0470021B1 (en) 1990-08-02 1991-07-31 Method for realization of castings of aluminium or its alloys with integrated runners

Country Status (16)

Country Link
US (1) US5305818A (en)
EP (1) EP0470021B1 (en)
JP (1) JP2986585B2 (en)
KR (1) KR100210171B1 (en)
AT (1) ATE124306T1 (en)
BR (1) BR9105018A (en)
CA (1) CA2048187C (en)
DE (1) DE69110786T2 (en)
ES (1) ES2074246T3 (en)
FI (1) FI96285C (en)
FR (1) FR2665384B1 (en)
IE (1) IE76321B1 (en)
IS (1) IS1675B (en)
MX (1) MX9100475A (en)
NO (1) NO178918C (en)
PT (1) PT98547B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647417A1 (en) 2004-10-12 2006-04-19 Montupet S.A. Wheel and casting method for such a wheel with a displaced and masked valve

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GB2274858B (en) * 1993-02-05 1996-04-24 Clifford Youngs Metal gates and fencing and methods of making the same
NL9401061A (en) * 1994-06-27 1996-02-01 Intergas B V Method for manufacturing a heat exchanger and a heat exchanger.
JPH1076357A (en) * 1996-09-04 1998-03-24 Toyota Motor Corp Method and device for casting in cylindrical body
DE19647069A1 (en) * 1996-11-14 1998-05-20 Heidelberger Druckmasch Ag Hollow cast body e.g. printing machine cylinder preform
DE10036481A1 (en) * 2000-07-20 2002-02-07 Metallwerke Harzgerode Gmbh Production of a piston comprises filling a hollow profile forming a wall of a cooling channel in the piston, placing the profile in a mold, filling the mold with a melt, pressing, solidifying, removing from the mold, and heating the piston
US20050133187A1 (en) * 2003-12-17 2005-06-23 Sean Seaver Die casting method system and die cast product
US20050133102A1 (en) * 2003-12-22 2005-06-23 Blackman Donald E. Hydraulic end head with internally cast hydraulic circuits
DE102007023192A1 (en) * 2006-09-08 2008-03-27 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Air compressor of a pneumatic system in a vehicle, comprises a piston pump that is fitted with a piston and a crankshaft, which are located in a crankcase, and a channel present in the crankcase for the guidance of coolant
DE102007030342B4 (en) * 2007-06-29 2010-10-07 Trimet Aluminium Ag Method and device for die casting of articulated metal castings
DE102008005438A1 (en) * 2008-01-22 2009-07-23 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressor cylinder head and method of making a compressor cylinder head
FR2943264B1 (en) 2009-03-17 2012-11-16 Hispano Suiza Sa MOLDED CASTER WITH REPORTED PIPES
US8863381B2 (en) * 2010-12-22 2014-10-21 GM Global Technology Operations LLC Method of making a piston oil gallery using a hollow metallic core
KR101692932B1 (en) * 2014-06-17 2017-01-04 육송(주) jig for cutting and elbow for fire hose reel apparatus
US20160256922A1 (en) * 2015-03-03 2016-09-08 Asia Vital Components (China) Co., Ltd. Manufacturing method of cole plate structure
CN105750505A (en) * 2016-04-13 2016-07-13 浙江锠泰机械工业有限公司 Compressor bore casting method
CN109648063B (en) * 2017-10-12 2021-04-06 烟台吉森新材料科技有限公司 Fixing structure and method for water cooling pipe in buried pipe casting

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US3848666A (en) * 1970-11-19 1974-11-19 Ethyl Corp Foamed metal bodies
FR2379340A1 (en) * 1977-02-08 1978-09-01 Roche Maurice Mfr. of large section castings with internal tubing - involves casting the metal around the tubing while the tubing is injected with atomised water droplets
JPS5597861A (en) * 1978-11-25 1980-07-25 Keiichiro Miyazaki Insert casting method of metal tubular body of pressure- resistant cylinder casting
JPS5573455A (en) * 1978-11-28 1980-06-03 Keiichiro Miyazaki Pipe body insert casting method weld-combining straight pipe and bend
DE3013745C2 (en) * 1980-04-10 1982-03-25 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Cast part with channels, as well as process and casting mold for the production of this cast part
JPS5934472A (en) * 1982-08-20 1984-02-24 Toyota Motor Corp Interlock controller for suction path wall heating and cabin warming
FR2585598B1 (en) * 1985-07-31 1987-11-20 Isere Ets Roche Fonderies Affi PROCESS FOR THE MANUFACTURE BY CASTING OF A METAL PART INTERNALLY PROVIDED WITH A HOLLOW PART SURROUNDED BY A TUBE

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP1647417A1 (en) 2004-10-12 2006-04-19 Montupet S.A. Wheel and casting method for such a wheel with a displaced and masked valve

Also Published As

Publication number Publication date
KR100210171B1 (en) 1999-07-15
CA2048187A1 (en) 1992-02-03
DE69110786D1 (en) 1995-08-03
NO913006L (en) 1992-02-03
PT98547B (en) 1999-01-29
ES2074246T3 (en) 1995-09-01
IS3738A7 (en) 1992-02-03
ATE124306T1 (en) 1995-07-15
FR2665384A1 (en) 1992-02-07
NO178918C (en) 1996-07-03
JPH04251656A (en) 1992-09-08
NO913006D0 (en) 1991-08-01
FI913671A0 (en) 1991-08-01
IS1675B (en) 1997-12-31
BR9105018A (en) 1993-05-25
PT98547A (en) 1993-09-30
FI96285C (en) 1996-06-10
MX9100475A (en) 1992-04-01
IE76321B1 (en) 1997-10-22
FR2665384B1 (en) 1992-10-16
FI96285B (en) 1996-02-29
FI913671A (en) 1992-02-03
NO178918B (en) 1996-03-25
EP0470021A1 (en) 1992-02-05
DE69110786T2 (en) 1995-11-23
JP2986585B2 (en) 1999-12-06
CA2048187C (en) 1999-04-27
IE912728A1 (en) 1992-02-12
US5305818A (en) 1994-04-26

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