EP3634666B1 - Injection device and method for producing at least one metallic glass part - Google Patents

Injection device and method for producing at least one metallic glass part Download PDF

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Publication number
EP3634666B1
EP3634666B1 EP18727029.3A EP18727029A EP3634666B1 EP 3634666 B1 EP3634666 B1 EP 3634666B1 EP 18727029 A EP18727029 A EP 18727029A EP 3634666 B1 EP3634666 B1 EP 3634666B1
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EP
European Patent Office
Prior art keywords
piston
injection
sleeve
face
injection chamber
Prior art date
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EP18727029.3A
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German (de)
French (fr)
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EP3634666A1 (en
Inventor
Sébastien GRAVIER
Georges KAPELSKI
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Institut Polytechnique de Grenoble
Universite Grenoble Alpes
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Institut Polytechnique de Grenoble
Universite Grenoble Alpes
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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
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/06—Special casting characterised by the nature of the product by its physical properties

Definitions

  • the present invention relates to the field of the production by injection of metal glass parts, also called amorphous metals or amorphous metal alloys.
  • Metallic glasses are recent materials which are conventionally obtained by rapid cooling of a metal or a molten metal alloy.
  • metal glasses applies to metals or metallic alloys which are not crystalline and also applies to metals or metallic alloys which are partially crystalline and which, therefore, contain a fraction of crystals. Generally, the fraction of the amorphous phase is greater than 50%.
  • the amorphous structure of metallic glasses gives them particularly advantageous properties: very high mechanical strength, high elastic deformation capacity, which is generally greater than 1.5%, high resistance to corrosion and abrasion.
  • parts having the desired shapes for particular uses should be made from a metallic glass.
  • the patent EP 0 875 318 describes a device for injecting metal glasses, housed in a chamber with a controlled atmosphere, which comprises on the one hand a crucible which comprises a vertical cylindrical wall and the bottom of which is formed by an upper radial end face of a piston vertical and on the other hand a mold which delimits a cavity and a vertical injection channel open downwards and in which is arranged an internal annular shoulder.
  • the crucible is filled with a metallic material melted under the effect of an induction coil placed around the vertical cylindrical wall of the crucible. Then, the crucible is moved upwards until the upper edge of its cylindrical wall abuts against the inner annular shoulder of the mold. Then, the piston is moved upward to inject the molten metallic material into the mold cavity.
  • the patent US 2007 / 0215306A1 describes an injection device in which a metallic material is placed on an upper radial face of a slide arranged inside a vertical cylindrical wall, constituting a crucible, and supported by a vertical jack. After closing a mold and melting the metallic material under the effect of an induction coil placed around the vertical cylindrical wall, the vertical cylinder moves the slide upwards in the vertical cylindrical wall in order to inject the molten metal material in the mold cavities arranged laterally at the upper end of the vertical cylindrical wall.
  • the patent JP 3,784,578 describes an injection device which comprises a vertical injection piston provided in its upper part with a very deep cylindrical recess fully receiving a metal element to be injected, so that the metal element to be injected is not only in contact with the bottom of the recess but also with the cylindrical wall of the recess.
  • the injection device comprises an induction coil for heating the metal element to be injected, such that the metal element to be injected and the induction coil are separated by the wall of the cylindrical recess.
  • the known injection devices, described above, have the drawback that a complete and persistent melting until the injection of the metallic material into the impression of the mold is not guaranteed because cold spots may remain or appear on contact of the metallic material with the cold wall of the crucible. Such cold spots can cause the formation of crystallization seeds which are detrimental to the preservation of the amorphous structure of the molten metallic material and to the final properties of the part produced in the impression of the mold.
  • the object of the present invention is in particular to avoid such drawbacks.
  • the piston has an upper end face on which can be placed a metallic element made of a material capable of forming a metallic glass, so that when the piston is moved upwards, this material is introduced into the injection chamber and injected into said cavity under the effect of the piston.
  • the upper end face of the piston has a hollow shape suitable for receiving a reduced lower portion of said metal element to itself maintain this element placed in fusion, so that the major part of said metal element is located above the end face of the piston, outside the hollow form.
  • the injection device further comprises a heating means which is located below the mold and which comprises induction turns coaxial with the piston, so that, in an intermediate position of the piston, the metal element is mainly located in the interior space with the induction turns.
  • the metal element is supported by the piston and a reduced lower portion of the metal element is exclusively in contact with the piston, so that a possible appearance of seed crystals, detrimental to the structural quality of the final part , would be confined in a volume limited to the lower portion of the element heated metal, which alone is adjacent to the piston, and the risk of the metal member sticking to the piston is reduced.
  • the piston may have, at its upper end, a peripheral chamfer, which may be frustoconical.
  • Said hollow shape may be spherical, conical or frustoconical.
  • the injection chamber may have an internal chamfer arranged in its lower entrance.
  • An upper portion of the piston may be able to slide vertically in the injection chamber of the mold forming a low clearance sliding fit.
  • the device may further comprise a sleeve arranged around an upper end portion of the piston and capable of sliding vertically with respect to the piston, the piston and the sleeve having axial stop means limiting the upward movement of the sleeve by relative to the piston and a spring urging the sleeve upwards relative to the piston, said sleeve having an annular bearing face capable of coming into contact against an annular bearing face of the mold located at the periphery of said injection chamber .
  • Said sleeve may be able to slide vertically with respect to said upper end portion of the piston, forming a sliding adjustment with low clearance.
  • Said sleeve may have an upper annular face located approximately at the level of the upper end face of the piston when said stop means are in abutment.
  • Said annular bearing face of the sleeve and said annular bearing face of the mold may extend radially.
  • Said annular bearing face of the sleeve and said annular bearing face of the mold may be frustoconical.
  • a portion of the sleeve may be able to penetrate into an antechamber of the mold located below the injection chamber.
  • the device may comprise a means for heating at least an upper part of said vertical piston.
  • an upper portion of the piston can be introduced into the injection chamber, the upper portion of the piston and the injection chamber forming between them a sliding fit with low sliding clearance.
  • a sleeve may be fitted to the upper end portion of the piston, the sleeve and the upper portion of the piston forming between them a low-clearance slip fit. and the sleeve and the mold possibly having annular bearing faces resting on one another during the injection of the metallic material.
  • a peripheral end chamfer of the piston may be opposite and at a distance from the inner edge of the interface between said annular bearing faces resting on one another.
  • At least the upper part of said vertical piston can be heated.
  • An injection device 1 illustrated on figures 1 to 4 comprises a mold 2 in which is arranged an internal cavity 3, the shape of which corresponds to the shape of a part to be produced, a cylindrical injection chamber 4, with a vertical axis 5, which opens downwards on the side of a horizontal outer lower face 6 of the mold 2 and an internal channel 7 which connects the upper part of the injection chamber 4 and the cavity 3, upwards or laterally.
  • the cylindrical injection chamber 4 has a cylindrical peripheral wall and a bottom, for example radial.
  • the mold 2 can have a plurality of indentations 3 connected to the injection chamber 4 by internal channels.
  • the injection device 1 comprises a vertical injection piston 8, for example metallic, which is arranged coaxially with the injection chamber 3, in a vertical direction 5, and which is movable vertically under the effect of means of translation drive (not shown) such as a jack or a screw-nut system or a ball screw system.
  • means of translation drive such as a jack or a screw-nut system or a ball screw system.
  • a cylindrical upper end portion 9 of the vertical piston 8 is able to be engaged and to slide vertically in the cylindrical injection chamber 4, forming a sliding adjustment with small clearance.
  • the vertical piston 8 has, at the upper end of the upper cylindrical end portion 9, a peripheral outer chamfer 10 and, optionally, the piston is sufficiently long to give sufficient flexibility allowing the sliding of the portion 9 in the chamber 4 despite defects alignment.
  • the injection chamber 4 could have, alternatively or in addition, an annular internal chamfer arranged in its lower inlet.
  • the upper cylindrical end portion 9 of the vertical piston 8 has an upper end face 11 which has a central hollow shape 12 and a radial annular zone 13 between the hollow shape 12 and the upper annular end of the chamfer 10.
  • the hollow shape 12 may be in the form of a spherical cap, as shown, or in the form of a cone or in the form of a cup with a radial bottom and a frustoconical peripheral wall.
  • the injection device 1 comprises a heating means 14 located below the mold 2, constituted for example by induction turns 15 coaxial with the vertical piston 8, wound for example in a cylinder or in a truncated cone.
  • the injection operations can take place as follows.
  • the piston 8 occupies a low loading position in which its upper end face 11 is located below and at a distance from the induction turns 15 of the heating means 14.
  • a metallic element 16 made of a material capable of forming a metallic glass, in the solid state, in the form of a grain, is deposited on the upper end face 11 of the piston 8, in a situation such that the hollow form 12 receives a reduced lower portion of the metal element 16 and by itself holds the metal element 16 in place, supporting it and preventing it from falling laterally to the piston 8.
  • the most of the metal element 16 is located above the end face 11 of the piston 8, outside the recess 12.
  • the removal operation can be carried out by a manipulator arm.
  • the removal operation can be carried out as follows.
  • a containment ring is brought above and at a short distance from the upper face 11 of the piston 8, and the lower end of a gutter inclined above the space created by the containment ring is brought.
  • a metal element 16 is deposited in an upper part of the gutter. The element 16 slides by gravity in the gutter and enters the space created by the containment ring which prevents it from falling, the metal element 16 being placed above the hollow form 12. After which , the gutter is removed and the containment ring is removed, without hitting the metal element 16 deposited.
  • the volume of the metallic element 16 can be about one tenth of a milliliter to three milliliters.
  • the metal element 16 is heated until it goes into a molten state.
  • the molten metal element 16 substantially takes the shape of a sphere, generally flattened, which bears and naturally takes a central position on the hollow shape 12.
  • the diameter of the cylindrical portion end 9 of the piston 8 is such that the molten metal element 16 does not protrude laterally.
  • the molten metal element 16 is introduced from the bottom up into the injection chamber 4, without it touching the peripheral wall of the injection chamber 4, then the cylindrical end portion 9 of the piston 8 engages the injection chamber 4.
  • the cylindrical peripheral wall of the end portion 9 of the piston 8 and the cylindrical internal wall of the injection chamber 4 forming a sliding fit with small clearance, create a seal.
  • the upward translational movement of the piston 8 creates a pressure in the injection chamber 4 which causes the injection of the molten metallic glass 16 into the cavity 3 via the channel 7. Due to the adjustment sliding with a small clearance between the upper end portion of the piston in the injection chamber 4, leakage of the metallic material is avoided.
  • a vent in the mold 2 is optionally provided. In the final high injection position, the end face 11 of the piston 8 does not preferably reach the bottom of the injection chamber 4.
  • the molten metal element 16 is in contact only locally with the hollow shape 12 of the piston 8, without any other contact. , and remains at a distance from the cylindrical wall of the injection chamber 4 as long as it does not reach the bottom of the injection chamber 4, so that the metallic material does not crystallize.
  • the temperature of the piston 8 can be substantially lower than the temperature of the heated metal element 16, so that the metal element 16 does not adhere to the piston 8.
  • the mold is equipped with controlled heating and / or means. cooling (not shown) so that the material constituting the part 17 obtained in the cavity 3 does not crystallize and that after extraction, the part 17 has the characteristics of a metallic glass, that is to say the characteristics of a metal or of an amorphous or at least partially amorphous or predominantly amorphous metal alloy.
  • the duration of the heating of the metallic glass element 16 may be about thirty seconds and the duration of the heating. displacement of the piston 8 from its intermediate position to the injection is short, for example about two seconds.
  • the injection device 1 is placed inside an enclosure with a controlled atmosphere, neutral with respect to the metallic glass used, or under vacuum.
  • the piston 8 is moved down to its lower position and the mold 2, which comprises coupled parts, is opened in order to unmold the part 17 obtained.
  • the piston 8 is equipped with a cylindrical sleeve 18 around its upper end portion 8, able to slide vertically with respect to one another by a sliding adjustment with small clearance.
  • the upward stroke of the sleeve 18 relative to the piston 8 is limited by axial stop means.
  • the piston 8 is provided with an annular radial outer shoulder 19 facing downwards and the sleeve 18 is provided with an annular radial inner shoulder 20 located below the shoulder 19 of the piston 8 and facing upwards.
  • the sleeve 18 is biased upwards with respect to the piston 8 in the direction of the approach of the shoulders 19 and 20.
  • a helical spring 21 is mounted around the piston 8 and is interposed axially between a lower radial annular face 22 of the sleeve 18 and an annular radial outer shoulder 23 of the piston 8.
  • the piston For mounting the sleeve 18 and the spring 21, the piston comprises a lower part 8a provided with the annular shoulder 23 and an upper part 8b provided with the annular shoulder 22 and coupled to the lower part 8a by a threaded axial portion 8c .
  • the sleeve 18 has an upper radial annular face 24 able to come to bear against the lower radial face 6 of the mold 2, around the injection chamber 4.
  • the sleeve 18 is arranged and behaves as follows.
  • the shoulders 19 and 20 are in contact under the effect of the spring 21.
  • the sleeve is in a high position relative to the piston 8.
  • the upper radial annular face 24 of the sleeve 18 is located approximately at the same level as the upper face d end 11 of piston 8, optionally slightly below.
  • the metal element 16 can be deposited without lateral obstacle on the upper end face 11 of the piston 8 and does not come into contact with the sleeve 18.
  • the sleeve 18 retains its high position relative to the piston 8 during the ascent of the piston 8 in the direction of the injection chamber 4.
  • the metal element 16 does not come into contact with the sleeve 18 when it is placed in contact.
  • fusion in the intermediate position of piston 8 illustrated on figure 6 corresponding to the figure 2 , and later.
  • the existence of the sleeve 18, the upper face 24 of which is located vertically at or in the vicinity of the end 11 of the piston 8, does not interfere with the operation of melting the metal element 16. under the effect of the induction turns 15.
  • the piston 8 continues its upward translational movement in the injection chamber 4 in order to inject the metallic glass into the cavity 3 of the mold 2 as described above.
  • the sleeve 18 remains in abutment against the lower radial face 24 of the mold 2, the piston 8 sliding upwards with respect to the sleeve 18, compressing the spring 21 and the shoulders 19 and 20 moving away from each other .
  • the sleeve 18 is replaced by a sleeve 25 which differs from the sleeve 18 in that its upper part 25a has a frustoconical peripheral annular surface 26, converging upwards.
  • the mold 2 has an inlet antechamber 27 which is situated below the injection chamber 4 and the peripheral wall of which has a frustoconical inner annular surface 28 situated at the periphery of the injection chamber 4 and converging towards this. last.
  • the piston 8 When the piston 8 is moved upwards from its aforementioned intermediate position, the upper part 25a of the sleeve 25 penetrates inside the antechamber 27 until the frustoconical peripheral annular surface 26 of the sleeve 25 abuts against. the frustoconical peripheral wall 28 of the antechamber 27.
  • the frustoconical peripheral annular surface 26 of the sleeve 25 and the frustoconical peripheral wall 28 of the antechamber 27 are complementary, the angle at the top of these frustoconical shapes possibly being between ten and sixty degrees.
  • the upper radial end face 24 of the sleeve 25 is located at a short distance from a radial annular shoulder 29 of the mold 2, located at the bottom of the antechamber 27 and around the injection chamber 4 .
  • the sleeve 25 slides relative to the piston 8 which enters the injection chamber 4 to inject the metallic glass element 16 placed on the piston 8 as described above.
  • the cylindrical peripheral wall of the upper cylindrical end portion 9 does not enter the injection chamber 4. Only an end part of the end part provided with the chamfer 10 of the upper cylindrical end portion 9 of the piston 8 is engaged in the injection chamber 4. The inner edge of the interface between the bearing faces 6 and 24 is located radially opposite the upper end chamfer 10 of the piston 8.
  • an alternative embodiment and arrangement equivalent to that described above with reference to figure 11 can be applied to the final arrangement according to the variant embodiment described with reference to figures 9 and 10 in which the sleeve 25 carried by the piston 8 has a frustoconical upper part 29 engaged in a frustoconical antechamber 28 of the mold 2.
  • the chamfer end peripheral 10 of piston 8 is located opposite and at a distance from the annular inner edge of the interface between the radial annular bottom 29 of the mold 2 of the antechamber 27 and the radial annular end face 24 of the piston 8.
  • the device 1 can be equipped with means for heating at least an upper part of said vertical piston 8, so that the material constituting the metallic element 16 does not cool or only slightly on contact with the hollow form. 12, in particular during the aforementioned injection phase, this so that the metallic material retains its molten state and that the metallic material remaining in the chamber 4 retains its molten state as long as the imprint 3 is not correctly and completely filled with molten metallic material.
  • this heating means may be formed by means for heating the portion 8a of the piston 8, the heat of which is transmitted by conduction to the upper portion 9 on which the metal element 16 is placed.
  • This heating means may comprise induction or resistive turns placed around portion 8a of piston 8 or be formed by a heating fluid circulating in channels formed in piston 8.

Description

La présente invention concerne le domaine de la production par injection de pièces en verres métalliques, appelés aussi métaux amorphes ou alliages métalliques amorphes.The present invention relates to the field of the production by injection of metal glass parts, also called amorphous metals or amorphous metal alloys.

Les verres métalliques sont des matériaux récents, qui sont classiquement obtenus par un refroidissement rapide d'un métal ou d'un alliage métallique en fusion.Metallic glasses are recent materials which are conventionally obtained by rapid cooling of a metal or a molten metal alloy.

L'appellation « verres métalliques » s'applique à des métaux ou des alliages métalliques qui ne sont pas cristallins et s'applique également à des métaux ou des alliages métalliques qui sont partiellement cristallins et qui, donc, contiennent une fraction de cristaux. Généralement, la fraction de la phase amorphe est supérieure à 50%.The term “metallic glasses” applies to metals or metallic alloys which are not crystalline and also applies to metals or metallic alloys which are partially crystalline and which, therefore, contain a fraction of crystals. Generally, the fraction of the amorphous phase is greater than 50%.

La structure amorphe des verres métalliques leur confère des propriétés particulièrement intéressantes : une très grande résistance mécanique, une grande capacité de déformation élastique, qui est généralement supérieure à 1,5%, une résistance élevée à la corrosion et à l'abrasion.The amorphous structure of metallic glasses gives them particularly advantageous properties: very high mechanical strength, high elastic deformation capacity, which is generally greater than 1.5%, high resistance to corrosion and abrasion.

On sait déjà élaborer des verres métalliques en particulier à base de zirconium (Zr), de magnésium (Mg), de fer (Fe), de cuivre (Cu), d'aluminium (Al), de palladium (Pd), de platine (Pt), de titane (Ti), de cobalt (Co).We already know how to develop metallic glasses based in particular on zirconium (Zr), magnesium (Mg), iron (Fe), copper (Cu), aluminum (Al), palladium (Pd), platinum. (Pt), titanium (Ti), cobalt (Co).

Disposant d'une matière apte à former un verre métallique, il convient de réaliser des pièces présentant des formes souhaitées en vue d'usages particuliers, en un verre métallique.Having a material capable of forming a metallic glass, parts having the desired shapes for particular uses should be made from a metallic glass.

Le brevet EP 0 875 318 décrit un dispositif d'injection de verres métalliques, logé dans une enceinte à atmosphère contrôlée, qui comprend d'une part un creuset qui comprend une paroi cylindrique verticale et dont le fond est formé par une face radiale supérieure d'extrémité d'un piston vertical et d'autre part un moule qui délimite une empreinte et un canal vertical d'injection ouvert vers le bas et dans lequel est aménagé un épaulement annulaire intérieur. A distance au-dessous du moule, le creuset est rempli par un matériau métallique mis en fusion sous l'effet d'une bobine d'induction placée autour de la paroi cylindrique verticale du creuset. Puis, le creuset est déplacé vers le haut jusqu'à ce que le bord supérieur de sa paroi cylindrique vienne en butée contre l'épaulement annulaire intérieur du moule. Puis, le piston est déplacé vers le haut pour injecter le matériau métallique en fusion dans l'empreinte du moule.The patent EP 0 875 318 describes a device for injecting metal glasses, housed in a chamber with a controlled atmosphere, which comprises on the one hand a crucible which comprises a vertical cylindrical wall and the bottom of which is formed by an upper radial end face of a piston vertical and on the other hand a mold which delimits a cavity and a vertical injection channel open downwards and in which is arranged an internal annular shoulder. At a distance below the mold, the crucible is filled with a metallic material melted under the effect of an induction coil placed around the vertical cylindrical wall of the crucible. Then, the crucible is moved upwards until the upper edge of its cylindrical wall abuts against the inner annular shoulder of the mold. Then, the piston is moved upward to inject the molten metallic material into the mold cavity.

Le brevet US 2007/0215306A1 décrit un dispositif d'injection dans lequel un matériau métallique est placé sur une face radiale supérieure d'un coulisseau disposé à l'intérieur d'une paroi cylindrique verticale, constituant un creuset, et soutenu par un vérin vertical. Après fermeture d'un moule et mise en fusion du matériau métallique sous l'effet d'une bobine d'induction placée autour de la paroi cylindrique verticale, le vérin vertical déplace vers le haut le coulisseau dans la paroi cylindrique verticale afin d'injecter le matériau métallique en fusion dans des empreintes du moule aménagées latéralement à l'extrémité supérieure de la paroi cylindrique verticale.The patent US 2007 / 0215306A1 describes an injection device in which a metallic material is placed on an upper radial face of a slide arranged inside a vertical cylindrical wall, constituting a crucible, and supported by a vertical jack. After closing a mold and melting the metallic material under the effect of an induction coil placed around the vertical cylindrical wall, the vertical cylinder moves the slide upwards in the vertical cylindrical wall in order to inject the molten metal material in the mold cavities arranged laterally at the upper end of the vertical cylindrical wall.

Le brevet JP 3 784 578 décrit un dispositif d'injection qui comprend un piston vertical d'injection pourvu dans sa partie supérieure d'un évidement cylindrique de grande profondeur recevant en entier un élément métallique à injecter, si bien que l'élément métallique à injecter est en contact non seulement avec le fond de l'évidement mais également avec la paroi cylindrique de l'évidement. En outre, le dispositif d'injection comprend une bobine d'induction pour le chauffage de l'élément métallique à injecter, telle que l'élément métallique à injecter et la bobine d'induction sont séparées par la paroi de l'évidement cylindrique.The patent JP 3,784,578 describes an injection device which comprises a vertical injection piston provided in its upper part with a very deep cylindrical recess fully receiving a metal element to be injected, so that the metal element to be injected is not only in contact with the bottom of the recess but also with the cylindrical wall of the recess. In addition, the injection device comprises an induction coil for heating the metal element to be injected, such that the metal element to be injected and the induction coil are separated by the wall of the cylindrical recess.

Les dispositifs d'injection connus, décrits ci-dessus, présentent l'inconvénient qu'une fusion complète et persistante jusqu'à l'injection du matériau métallique dans l'empreinte du moule n'est pas garantie car des points froids peuvent subsister ou apparaître au contact du matériau métallique avec la paroi froide du creuset. De tels points froids peuvent engendrer la formation de germes de cristallisation qui sont nuisibles à la conservation de la structure amorphe du matériau métallique en fusion et aux propriétés finales de la pièce réalisée dans l'empreinte du moule.The known injection devices, described above, have the drawback that a complete and persistent melting until the injection of the metallic material into the impression of the mold is not guaranteed because cold spots may remain or appear on contact of the metallic material with the cold wall of the crucible. Such cold spots can cause the formation of crystallization seeds which are detrimental to the preservation of the amorphous structure of the molten metallic material and to the final properties of the part produced in the impression of the mold.

La présente invention a notamment pour objet d'éviter de tels inconvénients.The object of the present invention is in particular to avoid such drawbacks.

Selon un mode de réalisation, il est proposé un dispositif d'injection pour la production d'au moins une pièce en un verre métallique, qui comprend :

  • un moule présentant au moins une empreinte et une chambre d'injection reliée à l'empreinte et ouverte vers le bas, et
  • un piston vertical d'injection coaxial à ladite chambre d'injection et s'étendant au-dessous du moule.
According to one embodiment, an injection device is provided for the production of at least one part made of a metallic glass, which comprises:
  • a mold having at least one cavity and an injection chamber connected to the cavity and open downwards, and
  • a vertical injection piston coaxial with said injection chamber and extending below the mold.

Le piston présente une face supérieure d'extrémité sur laquelle peut être posé un élément métallique en une matière apte à former un verre métallique, de sorte que lorsque le piston est déplacé vers le haut, cette matière est introduite dans la chambre d'injection et injectée dans ladite empreinte sous l'effet du piston.The piston has an upper end face on which can be placed a metallic element made of a material capable of forming a metallic glass, so that when the piston is moved upwards, this material is introduced into the injection chamber and injected into said cavity under the effect of the piston.

La face supérieure d'extrémité du piston présente une forme en creux apte à recevoir une portion inférieure réduite dudit élément métallique pour maintenir à elle seule cet élément posé en fusion, de sorte que la majeure partie dudit élément métallique est située au-dessus de la face d'extrémité du piston, à l'extérieur de la forme en creux.The upper end face of the piston has a hollow shape suitable for receiving a reduced lower portion of said metal element to itself maintain this element placed in fusion, so that the major part of said metal element is located above the end face of the piston, outside the hollow form.

Le dispositif d'injection comprend en outre un moyen de chauffage qui est situé au-dessous du moule et qui comprend des spires d'induction coaxiales au piston, de sorte que, dans une position intermédiaire du piston, l'élément métallique est situé majoritairement dans l'espace intérieur aux spires d'induction.The injection device further comprises a heating means which is located below the mold and which comprises induction turns coaxial with the piston, so that, in an intermediate position of the piston, the metal element is mainly located in the interior space with the induction turns.

Ainsi, l'élément métallique est soutenu par le piston et une portion inférieure réduite de l'élément métallique est exclusivement en contact avec le piston, de sorte qu'une apparition éventuelle de germes de cristaux, nuisible à la qualité structurale de la pièce finale, serait confinée dans un volume limité à la portion inférieure de l'élément métallique chauffé, qui, seule, est adjacente au piston, et le risque de collage de l'élément métallique sur le piston est réduit.Thus, the metal element is supported by the piston and a reduced lower portion of the metal element is exclusively in contact with the piston, so that a possible appearance of seed crystals, detrimental to the structural quality of the final part , would be confined in a volume limited to the lower portion of the element heated metal, which alone is adjacent to the piston, and the risk of the metal member sticking to the piston is reduced.

Le piston peut présenter, à son extrémité supérieure, un chanfrein périphérique, qui peut être tronconique.The piston may have, at its upper end, a peripheral chamfer, which may be frustoconical.

Ladite forme en creux peut être sphérique, conique ou tronconique.Said hollow shape may be spherical, conical or frustoconical.

La chambre d'injection peut présenter un chanfrein intérieur aménagé dans son entrée inférieure.The injection chamber may have an internal chamfer arranged in its lower entrance.

Une portion supérieure du piston peut être apte à coulisser verticalement dans la chambre d'injection du moule en formant un ajustement glissant à faible jeu.An upper portion of the piston may be able to slide vertically in the injection chamber of the mold forming a low clearance sliding fit.

Le dispositif peut comprendre en outre un manchon disposé autour d'une portion supérieure d'extrémité du piston et apte à coulisser verticalement par rapport au piston, le piston et le manchon présentant des moyens de butée axiale limitant le mouvement vers le haut du manchon par rapport au piston et un ressort sollicitant vers le haut le manchon par rapport au piston, ledit manchon présentant une face annulaire d'appui apte à venir en contact contre une face annulaire d'appui du moule située à la périphérie de ladite chambre d'injection.The device may further comprise a sleeve arranged around an upper end portion of the piston and capable of sliding vertically with respect to the piston, the piston and the sleeve having axial stop means limiting the upward movement of the sleeve by relative to the piston and a spring urging the sleeve upwards relative to the piston, said sleeve having an annular bearing face capable of coming into contact against an annular bearing face of the mold located at the periphery of said injection chamber .

Ledit manchon peut être apte à coulisser verticalement par rapport à ladite portion supérieure d'extrémité du piston en formant un ajustement glissant à faible jeu.Said sleeve may be able to slide vertically with respect to said upper end portion of the piston, forming a sliding adjustment with low clearance.

Ledit manchon peut présenter une face annulaire supérieure située approximativement au niveau de la face supérieure d'extrémité du piston lorsque lesdits moyens de butée sont en butée.Said sleeve may have an upper annular face located approximately at the level of the upper end face of the piston when said stop means are in abutment.

Ladite face annulaire d'appui du manchon et ladite face annulaire d'appui du moule peuvent s'étendre radialement.Said annular bearing face of the sleeve and said annular bearing face of the mold may extend radially.

Ladite face annulaire d'appui du manchon et ladite face annulaire d'appui du moule peuvent être tronconiques.Said annular bearing face of the sleeve and said annular bearing face of the mold may be frustoconical.

Une portion du manchon peut être apte à pénétrer dans une antichambre du moule située au-dessous de la chambre d'injection.A portion of the sleeve may be able to penetrate into an antechamber of the mold located below the injection chamber.

Le dispositif peut comprendre un moyen de chauffage d'au moins une partie supérieure dudit piston vertical.The device may comprise a means for heating at least an upper part of said vertical piston.

Il est également proposé un procédé d'injection pour la production d'au moins une pièce en un verre métallique, qui comprend les étapes suivantes :

  • placer un élément métallique en une matière apte à former un verre métallique, à l'état solide, sur une face supérieure d'extrémité d'un piston vertical d'injection, cette face supérieure d'extrémité présentant une forme en creux recevant une portion inférieure réduite dudit élément métallique posé pour maintenir à elle seule ce dernier, de sorte que la majeure partie dudit élément métallique est située au-dessus de la face d'extrémité du piston, à l'extérieur de la forme en creux,
  • chauffer ledit élément métallique par l'intermédiaire d'un moyen de chauffage situé au-dessous du moule et comprenant des spires d'induction coaxiales au piston (8), de sorte que, dans une position intermédiaire du piston, l'élément métallique est situé dans l'espace intérieur aux spires d'induction, ledit élément métallique en fusion étant maintenu sur la face supérieure d'extrémité du piston sous l'effet de ladite forme en creux, et
  • déplacer le piston verticalement vers le haut pour introduire ledit élément métallique en fusion dans une chambre d'injection d'un moule, puis créer une pression dans la chambre d'injection du moule afin d'injecter la matière métallique en fusion dans au moins une empreinte du moule reliée à la chambre d'injection.
There is also provided an injection process for the production of at least one piece of metallic glass, which comprises the following steps:
  • placing a metallic element in a material capable of forming a metallic glass, in the solid state, on an upper end face of a vertical injection piston, this upper end face having a hollow shape receiving a portion reduced lower part of said metal element placed to hold the latter alone, so that the major part of said metal element is located above the end face of the piston, outside the hollow form,
  • heating said metallic element by means of heating means located below the mold and comprising induction turns coaxial with the piston (8), so that, in an intermediate position of the piston, the metallic element is located in the space inside the induction turns, said molten metal element being held on the upper end face of the piston under the effect of said hollow shape, and
  • moving the piston vertically upwards to introduce said molten metallic element into an injection chamber of a mold, then creating pressure in the injection chamber of the mold in order to inject the molten metallic material into at least one mold cavity connected to the injection chamber.

Pour injecter la matière métallique en fusion, une portion supérieure du piston peut être introduite dans la chambre d'injection, la portion supérieure du piston et la chambre d'injection formant entre elles un ajustement glissant à faible jeu de coulissement.To inject the molten metallic material, an upper portion of the piston can be introduced into the injection chamber, the upper portion of the piston and the injection chamber forming between them a sliding fit with low sliding clearance.

Un manchon peut être monté sur la portion supérieure d'extrémité du piston, le manchon et la portion supérieure du piston formant entre eux un ajustement glissant à faible jeu de coulissement et le manchon et le moule pouvant présenter des faces annulaires d'appui en appui l'une sur l'autre lors de l'injection de la matière métallique.A sleeve may be fitted to the upper end portion of the piston, the sleeve and the upper portion of the piston forming between them a low-clearance slip fit. and the sleeve and the mold possibly having annular bearing faces resting on one another during the injection of the metallic material.

En position finale d'injection, un chanfrein périphérique d'extrémité du piston peut être en regard et à distance du bord intérieur de l'interface entre lesdites faces annulaires d'appui en appui l'une sur l'autre.In the final injection position, a peripheral end chamfer of the piston may be opposite and at a distance from the inner edge of the interface between said annular bearing faces resting on one another.

Au moins la partie supérieure dudit piston vertical peut être chauffée.At least the upper part of said vertical piston can be heated.

Un dispositif d'injection et son mode de fonctionnement vont maintenant être décrits à titre d'exemples non limitatifs, illustrés par le dessin dans lequel :

  • la figure 1 représente une coupe verticale d'un dispositif d'injection, dans une position basse de chargement ;
  • la figure 2 représente en coupe verticale le dispositif d'injection, dans une position intermédiaire de chauffage ;
  • la figure 3 représente en coupe verticale le dispositif d'injection, dans une position intermédiaire d'injection ;
  • la figure 4 représente en coupe verticale le dispositif d'injection, dans une position finale d'injection ;
  • la figure 5 représente en coupe verticale une variante de réalisation du dispositif d'injection, dans une position basse de chargement ;
  • la figure 6 représente en coupe verticale le dispositif d'injection de la figure 5, dans une position intermédiaire de chauffage ;
  • la figure 7 représente en coupe verticale le dispositif d'injection de la figure 5, dans une position intermédiaire d'injection ;
  • la figure 8 représente en coupe verticale le dispositif d'injection de la figure 5, dans une position finale d'injection ;
  • la figure 9 représente en coupe verticale une autre variante de réalisation du dispositif d'injection, dans une position basse de chargement ;
  • la figure 10 représente en coupe verticale le dispositif d'injection de la figure 9, dans une position intermédiaire d'injection ;
  • la figure 11 représente une coupe verticale d'une variante de réalisation du dispositif d'injection de la figure 5, dans une autre position finale d'injection ; et
  • la figure 12 représente une coupe verticale d'une variante de réalisation du dispositif d'injection de la figure 9, dans une autre position finale d'injection.
An injection device and its mode of operation will now be described by way of nonlimiting examples, illustrated by the drawing in which:
  • the figure 1 shows a vertical section of an injection device, in a low loading position;
  • the figure 2 shows in vertical section the injection device, in an intermediate heating position;
  • the figure 3 shows in vertical section the injection device, in an intermediate injection position;
  • the figure 4 shows in vertical section the injection device, in a final injection position;
  • the figure 5 shows in vertical section an alternative embodiment of the injection device, in a low loading position;
  • the figure 6 shows in vertical section the injection device of the figure 5 , in an intermediate heating position;
  • the figure 7 shows in vertical section the injection device of the figure 5 , in an intermediate injection position;
  • the figure 8 shows in vertical section the injection device of the figure 5 , in a final injection position;
  • the figure 9 shows in vertical section another variant embodiment of the injection device, in a low loading position;
  • the figure 10 shows in vertical section the injection device of the figure 9 , in an intermediate injection position;
  • the figure 11 shows a vertical section of an alternative embodiment of the injection device of the figure 5 , in another final injection position; and
  • the figure 12 shows a vertical section of an alternative embodiment of the injection device of the figure 9 , in another final injection position.

Un dispositif d'injection 1 illustré sur les figures 1 à 4 comprend un moule 2 dans lequel est aménagée une empreinte intérieure 3, dont la forme correspond à la forme d'une pièce à élaborer, une chambre cylindrique d'injection 4, à axe vertical 5, qui débouche vers le bas du côté d'une face inférieure extérieure horizontale 6 du moule 2 et un canal intérieur 7 qui relie la partie supérieure de la chambre d'injection 4 et l'empreinte 3, vers le haut ou latéralement. La chambre cylindrique d'injection 4 présente une paroi périphérique cylindrique et un fond par exemple radial.An injection device 1 illustrated on figures 1 to 4 comprises a mold 2 in which is arranged an internal cavity 3, the shape of which corresponds to the shape of a part to be produced, a cylindrical injection chamber 4, with a vertical axis 5, which opens downwards on the side of a horizontal outer lower face 6 of the mold 2 and an internal channel 7 which connects the upper part of the injection chamber 4 and the cavity 3, upwards or laterally. The cylindrical injection chamber 4 has a cylindrical peripheral wall and a bottom, for example radial.

Le moule 2 peut présenter une pluralité d'empreintes 3 reliées à la chambre d'injection 4 par des canaux internes.The mold 2 can have a plurality of indentations 3 connected to the injection chamber 4 by internal channels.

Le dispositif d'injection 1 comprend un piston vertical d'injection 8, par exemple métallique, qui est disposé coaxialement à la chambre d'injection 3, selon une direction verticale 5, et qui est mobile verticalement sous l'effet de moyens d'entraînement en translation (non représentés) tels qu'un vérin ou un système de vis-écrou ou un système vis à billes.The injection device 1 comprises a vertical injection piston 8, for example metallic, which is arranged coaxially with the injection chamber 3, in a vertical direction 5, and which is movable vertically under the effect of means of translation drive (not shown) such as a jack or a screw-nut system or a ball screw system.

Une portion supérieure cylindrique d'extrémité 9 du piston vertical 8 est apte à être engagée et à coulisser verticalement dans la chambre cylindrique d'injection 4 en formant un ajustement glissant à faible jeu. Optionnellement, pour que cet engagement soit facilité et pour corriger d'éventuels défauts d'alignement, le piston vertical 8 présente, à l'extrémité supérieure de la portion supérieure cylindrique d'extrémité 9, un chanfrein extérieur périphérique 10 et, éventuellement, le piston est suffisamment long pour donner une souplesse suffisante permettant le coulissement de la portion 9 dans la chambre 4 malgré des défauts d'alignement. Selon une variante de réalisation, la chambre d'injection 4 pourrait présenter, alternativement ou en complément, un chanfrein intérieur annulaire aménagé dans son entrée inférieure.A cylindrical upper end portion 9 of the vertical piston 8 is able to be engaged and to slide vertically in the cylindrical injection chamber 4, forming a sliding adjustment with small clearance. Optionally, so that this engagement is facilitated and to correct d '' any misalignment, the vertical piston 8 has, at the upper end of the upper cylindrical end portion 9, a peripheral outer chamfer 10 and, optionally, the piston is sufficiently long to give sufficient flexibility allowing the sliding of the portion 9 in the chamber 4 despite defects alignment. According to an alternative embodiment, the injection chamber 4 could have, alternatively or in addition, an annular internal chamfer arranged in its lower inlet.

La portion supérieure cylindrique d'extrémité 9 du piston vertical 8 présente une face supérieure d'extrémité 11 qui présente une forme centrale en creux 12 et une zone annulaire radiale 13 entre la forme en creux 12 et l'extrémité annulaire supérieure du chanfrein 10. Par exemple, la forme en creux 12 peut se présenter sous la forme d'une calotte sphérique, telle que représentée, ou sous la forme d'un cône ou sous la forme d'une cuvette à fond radial et à paroi périphérique tronconique.The upper cylindrical end portion 9 of the vertical piston 8 has an upper end face 11 which has a central hollow shape 12 and a radial annular zone 13 between the hollow shape 12 and the upper annular end of the chamfer 10. For example, the hollow shape 12 may be in the form of a spherical cap, as shown, or in the form of a cone or in the form of a cup with a radial bottom and a frustoconical peripheral wall.

Le dispositif d'injection 1 comprend un moyen de chauffage 14 situé au-dessous du moule 2, constitué par exemple par des spires d'induction 15 coaxiales au piston vertical 8, enroulées par exemple en cylindre ou en tronc de cône.The injection device 1 comprises a heating means 14 located below the mold 2, constituted for example by induction turns 15 coaxial with the vertical piston 8, wound for example in a cylinder or in a truncated cone.

Selon un mode de fonctionnement, les opérations d'injection peuvent se dérouler de la manière suivante.According to one operating mode, the injection operations can take place as follows.

Comme illustré sur la figure 1, le piston 8 occupe une position basse de chargement dans laquelle sa face supérieure d'extrémité 11 est située au-dessous et à distance des spires d'induction 15 du moyen de chauffage 14.As shown on the figure 1 , the piston 8 occupies a low loading position in which its upper end face 11 is located below and at a distance from the induction turns 15 of the heating means 14.

Dans cette position de chargement, un élément métallique 16 en une matière apte à former un verre métallique, à l'état solide, se présentant sous la forme d'un grain, est déposé sur la face supérieure d'extrémité 11 du piston 8, dans une situation telle que la forme en creux 12 reçoit une portion inférieure réduite de l'élément métallique 16 et maintient à elle seule l'élément métallique 16 posé, en le soutenant et en l'empêchant de tomber latéralement au piston 8. La majeure partie de l'élément métallique 16 est située au-dessus de la face d'extrémité 11 du piston 8, à l'extérieur de la forme en creux 12.In this loading position, a metallic element 16 made of a material capable of forming a metallic glass, in the solid state, in the form of a grain, is deposited on the upper end face 11 of the piston 8, in a situation such that the hollow form 12 receives a reduced lower portion of the metal element 16 and by itself holds the metal element 16 in place, supporting it and preventing it from falling laterally to the piston 8. The most of the metal element 16 is located above the end face 11 of the piston 8, outside the recess 12.

Selon une variante de réalisation, l'opération de dépose peut être réalisée par un bras manipulateur.According to an alternative embodiment, the removal operation can be carried out by a manipulator arm.

Selon une autre variante de réalisation, l'opération de dépose peut être réalisée de la manière suivante. On amène une bague de confinement au-dessus et à faible distance de la face supérieure 11 du piston 8, on amène l'extrémité inférieure d'une gouttière inclinée au-dessus de l'espace créé par la bague de confinement. On dépose un élément métallique 16 dans une partie haute de la gouttière. L'élément 16 glisse par gravité dans la gouttière et s'introduit dans l'espace créé par la bague de confinement qui l'empêche de tomber, l'élément métallique 16 se plaçant au-dessus de la forme en creux 12. Après quoi, on retire la gouttière et on retire la bague de confinement, sans heurter l'élément métallique 16 déposé.According to another variant embodiment, the removal operation can be carried out as follows. A containment ring is brought above and at a short distance from the upper face 11 of the piston 8, and the lower end of a gutter inclined above the space created by the containment ring is brought. A metal element 16 is deposited in an upper part of the gutter. The element 16 slides by gravity in the gutter and enters the space created by the containment ring which prevents it from falling, the metal element 16 being placed above the hollow form 12. After which , the gutter is removed and the containment ring is removed, without hitting the metal element 16 deposited.

A titre indicatif, le volume de l'élément métallique 16 peut être d'environ un dixième de millilitre à trois millilitres.As an indication, the volume of the metallic element 16 can be about one tenth of a milliliter to three milliliters.

Après quoi, le piston 8 est déplacé en translation vers le haut jusqu'à une position intermédiaire illustrée sur la figure 2, dans laquelle l'élément métallique 16 est situé majoritairement dans l'espace intérieur aux spires d'induction 15.Thereafter, the piston 8 is moved in translation upwards to an intermediate position illustrated in the figure. figure 2 , in which the metallic element 16 is located mainly in the space inside the induction turns 15.

Après quoi, grâce à l'induction générée par les spires d'induction 15, l'élément métallique 16 est chauffé jusqu'à ce qu'il passe à un état en fusion. Sous l'effet des tensions de surface, l'élément métallique 16 en fusion prend substantiellement la forme d'une sphère, généralement aplatie, qui prend appui et prend naturellement une position centrale sur la forme en creux 12. Le diamètre de la portion cylindrique d'extrémité 9 du piston 8 est tel que l'élément métallique 16 en fusion ne dépasse pas latéralement.Thereafter, thanks to the induction generated by the induction turns 15, the metal element 16 is heated until it goes into a molten state. Under the effect of surface tensions, the molten metal element 16 substantially takes the shape of a sphere, generally flattened, which bears and naturally takes a central position on the hollow shape 12. The diameter of the cylindrical portion end 9 of the piston 8 is such that the molten metal element 16 does not protrude laterally.

Après quoi, le piston 8 est déplacé vers le haut depuis sa position intermédiaire en direction de la chambre d'injection 4.After that, the piston 8 is moved upwards from its intermediate position in the direction of the injection chamber 4.

Ce faisant, comme illustré sur la figure 3, l'élément métallique 16 en fusion est introduit de bas en haut dans la chambre d'injection 4, sans qu'il ne touche la paroi périphérique de la chambre d'injection 4, puis la portion cylindrique d'extrémité 9 du piston 8 s'engage dans la chambre d'injection 4. Après que le chanfrein 10 ait été introduit dans la chambre d'injection 4, la paroi périphérique cylindrique de la portion d'extrémité 9 du piston 8 et la paroi interne cylindrique de la chambre d'injection 4, formant un ajustement glissant à faible jeu, créent une étanchéité.In doing so, as shown in the figure 3 , the molten metal element 16 is introduced from the bottom up into the injection chamber 4, without it touching the peripheral wall of the injection chamber 4, then the cylindrical end portion 9 of the piston 8 engages the injection chamber 4. After the chamfer 10 has been introduced into the injection chamber 4, the cylindrical peripheral wall of the end portion 9 of the piston 8 and the cylindrical internal wall of the injection chamber 4, forming a sliding fit with small clearance, create a seal.

Après quoi, le mouvement en translation vers le haut du piston 8 crée une pression dans la chambre d'injection 4 qui engendre l'injection du verre métallique 16 en fusion dans l'empreinte 3 via le canal 7. Du fait de l'ajustement glissant à faible jeu entre la portion supérieure d'extrémité du piston dans la chambre d'injection 4, les fuites de la matière métallique sont évitées. Un évent dans le moule 2 est optionnellement prévu. En position haute finale d'injection, la face d'extrémité 11 du piston 8 n'atteint pas, de préférence, le fond de la chambre d'injection 4.Thereafter, the upward translational movement of the piston 8 creates a pressure in the injection chamber 4 which causes the injection of the molten metallic glass 16 into the cavity 3 via the channel 7. Due to the adjustment sliding with a small clearance between the upper end portion of the piston in the injection chamber 4, leakage of the metallic material is avoided. A vent in the mold 2 is optionally provided. In the final high injection position, the end face 11 of the piston 8 does not preferably reach the bottom of the injection chamber 4.

Il résulte de ce qui précède que, jusqu'à la phase effective d'injection dans l'empreinte 3, l'élément métallique 16 en fusion n'est en contact que localement avec la forme en creux 12 du piston 8, sans autre contact, et reste à distance de la paroi cylindrique de la chambre d'injection 4 tant qu'il n'atteint pas le fond de la chambre d'injection 4, de sorte que la matière métallique ne cristallise pas.It follows from the foregoing that, until the actual phase of injection into the cavity 3, the molten metal element 16 is in contact only locally with the hollow shape 12 of the piston 8, without any other contact. , and remains at a distance from the cylindrical wall of the injection chamber 4 as long as it does not reach the bottom of the injection chamber 4, so that the metallic material does not crystallize.

Avantageusement, la température du piston 8 peut être sensiblement inférieure à la température de l'élément métallique 16 chauffé, de sorte que l'élément métallique 16 n'adhère pas au piston 8.Le moule est équipé de moyens contrôlés de chauffage et/ou de refroidissement (non représentés) afin que la matière constituant la pièce 17 obtenue dans l'empreinte 3 ne cristallise pas et qu'après extraction, la pièce 17 présente les caractéristiques d'un verre métallique, c'est-à-dire les caractéristiques d'un métal ou d'un alliage métallique amorphe ou au moins partiellement amorphe ou majoritairement amorphe.Advantageously, the temperature of the piston 8 can be substantially lower than the temperature of the heated metal element 16, so that the metal element 16 does not adhere to the piston 8. The mold is equipped with controlled heating and / or means. cooling (not shown) so that the material constituting the part 17 obtained in the cavity 3 does not crystallize and that after extraction, the part 17 has the characteristics of a metallic glass, that is to say the characteristics of a metal or of an amorphous or at least partially amorphous or predominantly amorphous metal alloy.

A titre d'exemple, la durée du chauffage de l'élément en verre métallique 16 peut être d'environ trente secondes et la durée du déplacement du piston 8 depuis sa position intermédiaire jusqu'à l'injection est courte, par exemple d'environ deux secondes.By way of example, the duration of the heating of the metallic glass element 16 may be about thirty seconds and the duration of the heating. displacement of the piston 8 from its intermediate position to the injection is short, for example about two seconds.

Le dispositif d'injection 1 est placé à l'intérieur d'une enceinte à atmosphère contrôlée, neutre vis-à-vis du verre métallique mis en œuvre, ou sous vide.The injection device 1 is placed inside an enclosure with a controlled atmosphere, neutral with respect to the metallic glass used, or under vacuum.

Par la suite, le piston 8 est déplacé vers le bas jusqu'à sa position basse et le moule 2, qui comprend des parties accouplées, est ouvert afin de démouler la pièce 17 obtenue.Subsequently, the piston 8 is moved down to its lower position and the mold 2, which comprises coupled parts, is opened in order to unmold the part 17 obtained.

Après un éventuel nettoyage du moule 2, les opérations qui viennent d'être décrites peuvent être renouvelées pour confectionner en série successivement des pièces en verre métallique 17.After a possible cleaning of the mold 2, the operations which have just been described can be repeated in order to manufacture in series successively pieces of metallic glass 17.

Selon une variante de réalisation illustrée sur les figures 5 à 8, le piston 8 est équipé d'un manchon cylindrique 18 autour de sa portion supérieure d'extrémité 8, aptes à coulisser verticalement l'un par rapport à l'autre par un ajustement glissant à faible jeu.According to an alternative embodiment illustrated on figures 5 to 8 , the piston 8 is equipped with a cylindrical sleeve 18 around its upper end portion 8, able to slide vertically with respect to one another by a sliding adjustment with small clearance.

La course vers le haut du manchon 18 par rapport au piston 8 est limitée par des moyens de butée axiale. Pour cela, par exemple, le piston 8 est pourvu d'un épaulement extérieur radial annulaire 19 orienté vers le bas et le manchon 18 est pourvu d'un épaulement intérieur radial annulaire 20 situé au-dessous de l'épaulement 19 du piston 8 et orienté vers le haut.The upward stroke of the sleeve 18 relative to the piston 8 is limited by axial stop means. For this, for example, the piston 8 is provided with an annular radial outer shoulder 19 facing downwards and the sleeve 18 is provided with an annular radial inner shoulder 20 located below the shoulder 19 of the piston 8 and facing upwards.

Le manchon 18 est sollicité vers le haut par rapport au piston 8 dans le sens du rapprochement des épaulements 19 et 20. Pour cela, par exemple, un ressort hélicoïdal 21 est monté autour du piston 8 et est interposé axialement entre une face annulaire radiale inférieure 22 du manchon 18 et un épaulement extérieur radial annulaire 23 du piston 8.The sleeve 18 is biased upwards with respect to the piston 8 in the direction of the approach of the shoulders 19 and 20. For this, for example, a helical spring 21 is mounted around the piston 8 and is interposed axially between a lower radial annular face 22 of the sleeve 18 and an annular radial outer shoulder 23 of the piston 8.

Pour le montage du manchon 18 et du ressort 21, le piston comprend une partie inférieure 8a pourvue de l'épaulement annulaire 23 et une partie supérieure 8b pourvue de l'épaulement annulaire 22 et accouplée à la partie inférieure 8a par une portion axiale filetée 8c.For mounting the sleeve 18 and the spring 21, the piston comprises a lower part 8a provided with the annular shoulder 23 and an upper part 8b provided with the annular shoulder 22 and coupled to the lower part 8a by a threaded axial portion 8c .

Le manchon 18 présente une face annulaire radiale supérieure 24 apte à venir en appui contre la face radiale inférieure 6 du moule 2, autour de la chambre d'injection 4.The sleeve 18 has an upper radial annular face 24 able to come to bear against the lower radial face 6 of the mold 2, around the injection chamber 4.

Lors des opérations d'injection décrites précédemment, le manchon 18 est disposé et se comporte de la manière suivante.During the injection operations described above, the sleeve 18 is arranged and behaves as follows.

Comme illustré sur la figure 5, dans laquelle le piston 8 est dans une position basse de chargement correspondant à la figure 1, les épaulements 19 et 20 sont en contact sous l'effet du ressort 21. Le manchon est dans une position haute par rapport au piston 8. La face annulaire radiale supérieure 24 du manchon 18 est située approximativement au même niveau que la face supérieure d'extrémité 11 du piston 8, optionnellement légèrement au-dessous. Ainsi, l'élément métallique 16 peut être déposé sans obstacle latéral sur la face supérieure d'extrémité 11 du piston 8 et n'entre pas en contact avec le manchon 18.As shown on the figure 5 , in which the piston 8 is in a low loading position corresponding to the figure 1 , the shoulders 19 and 20 are in contact under the effect of the spring 21. The sleeve is in a high position relative to the piston 8. The upper radial annular face 24 of the sleeve 18 is located approximately at the same level as the upper face d end 11 of piston 8, optionally slightly below. Thus, the metal element 16 can be deposited without lateral obstacle on the upper end face 11 of the piston 8 and does not come into contact with the sleeve 18.

Le manchon 18 conserve sa position haute par rapport au piston 8 lors de la montée du piston 8 en direction de la chambre d'injection 4. L'élément métallique 16 n'entre pas en contact avec le manchon 18 lorsqu'il est mis en fusion dans la position intermédiaire du piston 8 illustrée sur la figure 6, correspondant à la figure 2, et ultérieurement. De plus, l'existence du manchon 18, dont la face supérieure 24 se situe verticalement au niveau ou dans le voisinage de l'extrémité 11 du piston 8, ne nuit pas à l'opération de mise en fusion de l'élément métallique 16 sous l'effet des spires d'induction 15.The sleeve 18 retains its high position relative to the piston 8 during the ascent of the piston 8 in the direction of the injection chamber 4. The metal element 16 does not come into contact with the sleeve 18 when it is placed in contact. fusion in the intermediate position of piston 8 illustrated on figure 6 , corresponding to the figure 2 , and later. In addition, the existence of the sleeve 18, the upper face 24 of which is located vertically at or in the vicinity of the end 11 of the piston 8, does not interfere with the operation of melting the metal element 16. under the effect of the induction turns 15.

Lorsque le piston 8 s'approche en translation de la chambre d'injection 4, l'élément métallique 16 en fusion est introduit dans la chambre d'injection 4 comme décrit précédemment. Cette fois, la face radiale annulaire supérieure 24 du manchon 18 entre en butée contre la face radiale inférieure 24 du moule 2 comme illustré sur la figure 7.When the piston 8 approaches in translation the injection chamber 4, the molten metal element 16 is introduced into the injection chamber 4 as described above. This time, the upper annular radial face 24 of the sleeve 18 abuts against the lower radial face 24 of the mold 2 as illustrated in FIG. figure 7 .

Ensuite, le piston 8 poursuit son mouvement en translation vers le haut dans la chambre d'injection 4 afin d'injecter le verre métallique dans l'empreinte 3 du moule 2 comme décrit précédemment. Ce faisant, comme illustré sur la figure 8, le manchon 18 reste en appui contre la face radiale inférieure 24 du moule 2, le piston 8 coulissant vers le haut par rapport au manchon 18 en comprimant le ressort 21 et les épaulements 19 et 20 s'éloignant l'un de l'autre.Then, the piston 8 continues its upward translational movement in the injection chamber 4 in order to inject the metallic glass into the cavity 3 of the mold 2 as described above. In doing so, as shown in the figure 8 , the sleeve 18 remains in abutment against the lower radial face 24 of the mold 2, the piston 8 sliding upwards with respect to the sleeve 18, compressing the spring 21 and the shoulders 19 and 20 moving away from each other .

Après l'injection, lorsque le piston 8 est déplacé en translation vers le bas, le manchon 18 reprend sa place en position haute par rapport au piston 8.After the injection, when the piston 8 is moved in translation downward, the sleeve 18 returns to its place in the high position relative to the piston 8.

Grâce à l'ajustement glissant à faible jeu entre le manchon 18 et la portion supérieure d'extrémité 9 du piston 8 et grâce au contact entre la face radiale annulaire supérieure 24 du manchon 18 et la face inférieure radiale 6 du moule 2, autour de l'entrée de la chambre d'injection 4, une étanchéité est créée lorsque le piston 8 produit une pression d'injection dans la chambre d'injection 4 comme décrit précédemment.Thanks to the sliding adjustment with small clearance between the sleeve 18 and the upper end portion 9 of the piston 8 and thanks to the contact between the upper annular radial face 24 of the sleeve 18 and the radial lower face 6 of the mold 2, around the inlet of the injection chamber 4, a seal is created when the piston 8 produces an injection pressure in the injection chamber 4 as described above.

Selon une variante de réalisation illustrée sur les figures 9 et 10, le manchon 18 est remplacé par un manchon 25 qui se différencie du manchon 18 par le fait que sa partie supérieure 25a présente une surface annulaire périphérique tronconique 26, convergente vers le haut.According to an alternative embodiment illustrated on figures 9 and 10 , the sleeve 18 is replaced by a sleeve 25 which differs from the sleeve 18 in that its upper part 25a has a frustoconical peripheral annular surface 26, converging upwards.

Le moule 2 présente une antichambre d'entrée 27 qui est située au-dessous de la chambre d'injection 4 et dont la paroi périphérique présente une surface annulaire intérieure tronconique 28 située à la périphérie de la chambre d'injection 4 et convergente vers cette dernière.The mold 2 has an inlet antechamber 27 which is situated below the injection chamber 4 and the peripheral wall of which has a frustoconical inner annular surface 28 situated at the periphery of the injection chamber 4 and converging towards this. last.

Lorsque le piston 8 est déplacé vers le haut depuis sa position intermédiaire précitée, la partie supérieure 25a du manchon 25 pénètre à l'intérieur de l'antichambre 27 jusqu'à ce que la surface annulaire périphérique tronconique 26 du manchon 25 vienne en butée contre la paroi périphérique tronconique 28 de l'antichambre 27. La surface annulaire périphérique tronconique 26 du manchon 25 et la paroi périphérique tronconique 28 de l'antichambre 27 sont complémentaires, l'angle au sommet de ces formes tronconiques pouvant être compris entre dix et soixante degrés. Dans cette position en butée, la face supérieure radiale d'extrémité 24 du manchon 25 se trouve à faible distance d'un épaulement annulaire radial 29 du moule 2, situé au fond de l'antichambre 27 et autour de la chambre d'injection 4.When the piston 8 is moved upwards from its aforementioned intermediate position, the upper part 25a of the sleeve 25 penetrates inside the antechamber 27 until the frustoconical peripheral annular surface 26 of the sleeve 25 abuts against. the frustoconical peripheral wall 28 of the antechamber 27. The frustoconical peripheral annular surface 26 of the sleeve 25 and the frustoconical peripheral wall 28 of the antechamber 27 are complementary, the angle at the top of these frustoconical shapes possibly being between ten and sixty degrees. In this abutting position, the upper radial end face 24 of the sleeve 25 is located at a short distance from a radial annular shoulder 29 of the mold 2, located at the bottom of the antechamber 27 and around the injection chamber 4 .

Ensuite, le manchon 25 coulisse par rapport au piston 8 qui pénètre dans la chambre d'injection 4 pour injecter l'élément en verre métallique 16 posé sur le piston 8 comme décrit précédemment.Then, the sleeve 25 slides relative to the piston 8 which enters the injection chamber 4 to inject the metallic glass element 16 placed on the piston 8 as described above.

De façon équivalente au contact entre la face radiale annulaire supérieure 24 du manchon 18 et la face inférieure radiale 6 du moule 2, autour de l'entrée de la chambre d'injection 4, le contact entre la surface annulaire périphérique tronconique 26 du manchon 25 et la paroi périphérique tronconique 28 de l'antichambre 27 crée, comme illustré sur la figure 10, une étanchéité lorsque le piston 8 produit une pression d'injection dans la chambre d'injection 4 comme décrit précédemment.Similarly to the contact between the upper annular radial face 24 of the sleeve 18 and the radial lower face 6 of the mold 2, around the inlet of the injection chamber 4, the contact between the frustoconical peripheral annular surface 26 of the sleeve 25 and the frustoconical peripheral wall 28 of the antechamber 27 created, as illustrated in figure 10 , a seal when the piston 8 produces an injection pressure in the injection chamber 4 as described above.

Sur la figure 11 est illustrée une variante de réalisation et de disposition de celle décrite précédemment en référence à la figure 8.On the figure 11 is illustrated an alternative embodiment and arrangement of that described above with reference to figure 8 .

Selon cette variante, lorsque le piston 8 atteint sa position haute finale d'injection mentionnée en référence à la figure 8, la paroi périphérique cylindrique de la portion supérieure cylindrique d'extrémité 9 ne pénètre pas dans la chambre d'injection 4. Seule une partie d'extrémité de la partie terminale pourvue du chanfrein 10 de la portion supérieure cylindrique d'extrémité 9 du piston 8 est engagée dans la chambre d'injection 4. Le bord intérieur de l'interface entre les faces d'appui 6 et 24 est situé radialement en regard du chanfrein supérieur d'extrémité 10 du piston 8.According to this variant, when the piston 8 reaches its final high injection position mentioned with reference to figure 8 , the cylindrical peripheral wall of the upper cylindrical end portion 9 does not enter the injection chamber 4. Only an end part of the end part provided with the chamfer 10 of the upper cylindrical end portion 9 of the piston 8 is engaged in the injection chamber 4. The inner edge of the interface between the bearing faces 6 and 24 is located radially opposite the upper end chamfer 10 of the piston 8.

Dans ce cas, l'étanchéité de la chambre d'injection 4 soumise à la pression d'injection de la matière en fusion est assurée par l'appui annulaire de la face 24 du manchon 18 contre la face 6 du moule 2 sous l'effet du ressort 21 et par l'ajustement glissant à faible jeu entre le piston 8 et le manchon 18.In this case, the sealing of the injection chamber 4 subjected to the injection pressure of the molten material is ensured by the annular support of the face 24 of the sleeve 18 against the face 6 of the mold 2 under the effect of the spring 21 and by the sliding adjustment with small clearance between the piston 8 and the sleeve 18.

Comme illustré sur la figure 12, une variante de réalisation et de disposition équivalente à celle décrite ci-dessus en référence à la figure 11 peut être appliquée à la disposition finale selon la variante de réalisation décrite en référence aux figures 9 et 10 dans laquelle le manchon 25 porté par le piston 8 présente une partie supérieure tronconique 29 engagée dans une antichambre tronconique 28 du moule 2. Dans ce cas, en position finale d'injection, le chanfrein périphérique d'extrémité 10 du piston 8 se situe en regard et à distance du bord intérieur annulaire de l'interface entre le fond annulaire radial 29 du moule 2 de l'antichambre 27 et la face annulaire radiale d'extrémité 24 du piston 8.As shown on the figure 12 , an alternative embodiment and arrangement equivalent to that described above with reference to figure 11 can be applied to the final arrangement according to the variant embodiment described with reference to figures 9 and 10 in which the sleeve 25 carried by the piston 8 has a frustoconical upper part 29 engaged in a frustoconical antechamber 28 of the mold 2. In this case, in the final injection position, the chamfer end peripheral 10 of piston 8 is located opposite and at a distance from the annular inner edge of the interface between the radial annular bottom 29 of the mold 2 of the antechamber 27 and the radial annular end face 24 of the piston 8.

Avantageusement, le dispositif 1 peut être équipé d'un moyen de chauffage d'au moins une partie supérieure dudit piston vertical 8, de sorte que la matière constituant l'élément métallique 16 ne se refroidisse pas ou peu au contact sur la forme en creux 12, notamment lors de la phase d'injection précitée, ce afin que la matière métallique conserve son état en fusion et que la matière métallique restant dans la chambre 4 conserve son état en fusion tant que l'empreinte 3 n'est pas correctement et complètement remplie par la matière métallique en fusion.Advantageously, the device 1 can be equipped with means for heating at least an upper part of said vertical piston 8, so that the material constituting the metallic element 16 does not cool or only slightly on contact with the hollow form. 12, in particular during the aforementioned injection phase, this so that the metallic material retains its molten state and that the metallic material remaining in the chamber 4 retains its molten state as long as the imprint 3 is not correctly and completely filled with molten metallic material.

Par exemple, ce moyen de chauffage peut être formé par un moyen de chauffage de la portion 8a du piston 8 dont la chaleur est transmise par conduction à la portion supérieure 9 sur laquelle est placé l'élément métallique 16. Ce moyen de chauffage peut comprendre des spires d'induction ou résistives placées autour de la portion 8a du piston 8 ou être formé par un fluide de chauffage circulant dans des canaux aménagés dans le piston 8.For example, this heating means may be formed by means for heating the portion 8a of the piston 8, the heat of which is transmitted by conduction to the upper portion 9 on which the metal element 16 is placed. This heating means may comprise induction or resistive turns placed around portion 8a of piston 8 or be formed by a heating fluid circulating in channels formed in piston 8.

Claims (18)

  1. Injection device for producing at least one metallic glass part, comprising:
    a mould (2) having at least one cavity (3) and an injection chamber (4) connected to the cavity and open at the bottom, and
    a vertical injection piston (8) coaxial to said injection chamber (4) and extending under the mould,
    the piston (8) having a top end face (11) on which a metallic element made from a material able to form a metallic glass (16) can be positioned, in such a way that when the piston (8) is moved upwards, this material is introduced into the injection chamber (4) and injected into said cavity (3);
    and comprising a heating means (14) situated under the mould and comprising induction coils (15) coaxial to the piston (8), in such a way that, in an intermediate position of the piston, the metallic element is located mostly in the space interior to the induction coils, the heating means (14) being able to melt the metallic element (16) positioned on the top end face (11) of the piston, before the introduction thereof into the injection chamber (4),
    characterised in that the top end face (11) of the piston (8) has a concave shape (12) able to receive a reduced bottom portion of said metallic element so as to be the sole support for this molten element placed thereon, in such a way that most of said metallic element is situated over the end face (11) of the piston (8), at the exterior of the concave shape (12).
  2. Device according to claim 1, wherein the piston (8) has, at its top end, a peripheral chamfer (10).
  3. Device according to claim 2, wherein said chamfer is truncated.
  4. Device according to any one of the preceding claims, wherein said concave shape (11) is spherical, conical or truncated.
  5. Device according to any one of the preceding claims, wherein the injection chamber (4) has an inner chamfer arranged in its bottom inlet.
  6. Device according to any one of the preceding claims, wherein a top portion (9) of the piston (8) is able to slide vertically in the injection chamber (4) of the mould by forming a low-clearance sliding adjustment.
  7. Device according to any one of the preceding claims, comprising a sleeve (18; 25) arranged around a top end portion (9) of the piston (8) and able to slide vertically with respect to the piston, the piston (8) and the sleeve (18; 25) having axial abutment means (19, 20) limiting the upward movement of the sleeve with respect to the piston and a spring (21) urging the sleeve upwards with respect to the piston, said sleeve (18; 25) having an annular bearing face (24, 26) able to come into contact against an annular bearing face (6, 28) of the mould situated at the periphery of said injection chamber (4).
  8. Device according to claim 7, wherein said sleeve (18; 25) is able to slide vertically with respect to said top end portion (9) of the piston (8) by forming a low-clearance sliding adjustment.
  9. Device according to one of claims 7 and 8, wherein said sleeve has an annular bearing face (24) situated approximately at the top end face (11) of the piston (8) when said abutment means (19, 20) are in abutment.
  10. Device according to any one of claims 7 to 9, wherein said annular bearing face (24) of the sleeve (18) and said annular bearing face (6) of the mould extend radially.
  11. Device according to any one of claims 7 to 10, wherein said annular bearing face (26) of the sleeve (25) and said annular bearing face (28) of the mould are truncated.
  12. Device according to any one of claims 7 to 11, wherein a top portion (25a) of the sleeve (25) is able to penetrate into an antichamber (27) of the mould situated under the injection chamber (4).
  13. Device according to any one of the preceding claims, comprising a heating means of at least one top portion of said vertical piston (8).
  14. Injection method for producing at least one metallic glass part, comprising the following steps:
    placing a metallic element made of a material able to form a metallic glass (16), in the solid state, on a top end face (11) of a vertical injection piston (8), this top end face having a concave shape (12) receiving a reduced bottom portion of said metallic element (16) so as to be the sole support for this element placed thereon, in such a way that most of said metallic element is situated over the end face (11) of the piston (8), at the exterior of the concave shape (12),
    heating the metallic element (16) via a heating means (14) situated under the mould and comprising induction coils (15) coaxial to the piston (8), in such a way that, in an intermediate position of the piston, the metallic element is located mostly in the space interior to the induction coils, said molten metallic element being maintained on the top end face (11) of the piston under the effect of said concave shape (12),
    and displacing the piston (8) vertically upwards in order to introduce said molten metallic element (16) into an injection chamber (4) of a mould, then creating a pressure in the injection chamber (4) of the mould so as to inject the molten metallic material into at least one cavity (3) of the mould connected to the injection chamber (4).
  15. Method according to the preceding claim, wherein, to inject the molten metallic material, a top portion (9) of the piston (8) is introduced into the injection chamber (4), the top portion (9) of the piston (8) and the injection chamber (4) forming between them a sliding adjustment with low sliding clearance.
  16. Method according to any of the two preceding claims, wherein a sleeve (18, 25) is mounted on the top end portion (9) of the piston (8), wherein the sleeve (18, 25) and the top portion (9) of the piston form between them a sliding adjustment with low sliding clearance and wherein the sleeve (18, 25) and the mould have annular bearing faces (6, 24; 26, 28) bearing on one another during the injection of the metallic material.
  17. Method according to the preceding claim, wherein, in the final injection position, a peripheral end chamfer (10) of the piston (8) is facing and at a distance from the lower edge of the interface between said annular bearing faces (6, 24; 26, 28) bearing one on the other.
  18. Method according to any of the four preceding claims, wherein at least the top portion of said vertical piston (8) is heated.
EP18727029.3A 2017-06-09 2018-06-04 Injection device and method for producing at least one metallic glass part Active EP3634666B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1755186A FR3067269B1 (en) 2017-06-09 2017-06-09 INJECTION DEVICE AND METHOD FOR THE PRODUCTION OF AT LEAST ONE PIECE IN A METALLIC GLASS
PCT/EP2018/064562 WO2018224418A1 (en) 2017-06-09 2018-06-04 Injection device and method for producing at least one metallic glass part

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EP3634666A1 EP3634666A1 (en) 2020-04-15
EP3634666B1 true EP3634666B1 (en) 2021-03-31

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EP (1) EP3634666B1 (en)
FR (1) FR3067269B1 (en)
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US4006774A (en) * 1976-05-19 1977-02-08 United Technologies Corporation Die casting apparatus which eliminates shot sleeve-metal contact
JPS5594773A (en) * 1979-01-09 1980-07-18 Nissan Motor Co Ltd Method and apparatus for die-casting
JP3808167B2 (en) * 1997-05-01 2006-08-09 Ｙｋｋ株式会社 Method and apparatus for manufacturing amorphous alloy molded article formed by pressure casting with mold
US5954116A (en) * 1997-08-22 1999-09-21 Buhler Ag Shot sleeve and shot unit for a die casting machine
JP3784528B2 (en) 1998-03-05 2006-06-14 三菱伸銅株式会社 Surface-treated metal material and manufacturing method thereof
JP3784578B2 (en) * 1999-05-19 2006-06-14 Ｙｋｋ株式会社 Method and apparatus for manufacturing amorphous alloy molded article formed by pressure casting with mold
JP2004114058A (en) * 2002-09-24 2004-04-15 Ube Machinery Corporation Ltd Method for molding semi-solidified metal and its injection apparatus
JP4688145B2 (en) 2005-06-09 2011-05-25 日本碍子株式会社 Die casting apparatus and die casting method
JP2012110934A (en) * 2010-11-25 2012-06-14 Ryobi Ltd Vertical injection die casting apparatus and die casting method
US8356655B2 (en) * 2011-02-09 2013-01-22 United Technologies Corporation Shot tube plunger for a die casting system
WO2013158069A1 (en) 2012-04-16 2013-10-24 Apple Inc. Injection molding and casting of materials using a vertical injection molding system

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US11465198B2 (en) 2022-10-11
US20200222976A1 (en) 2020-07-16
WO2018224418A1 (en) 2018-12-13
EP3634666A1 (en) 2020-04-15
FR3067269A1 (en) 2018-12-14
FR3067269B1 (en) 2022-03-18

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