EP3634666A1 - Dispositif et procédé d'injection pour la production d'au moins une pièce en un verre métallique - Google Patents
Dispositif et procédé d'injection pour la production d'au moins une pièce en un verre métalliqueInfo
- Publication number
- EP3634666A1 EP3634666A1 EP18727029.3A EP18727029A EP3634666A1 EP 3634666 A1 EP3634666 A1 EP 3634666A1 EP 18727029 A EP18727029 A EP 18727029A EP 3634666 A1 EP3634666 A1 EP 3634666A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- sleeve
- mold
- injection
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
- B22D17/02—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
- B22D17/20—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
- 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 injection production of metal glass parts, also called amorphous metals or amorphous metal alloys.
- Metallic glasses are recent materials, which are conventionally obtained by rapidly cooling a molten metal or metal alloy.
- metal glasses refers to metals or metal alloys which are not crystalline and also applies to metals or metal alloys which are partially crystalline and therefore contain a fraction of crystals. Generally, the fraction of the amorphous phase is greater than 50%.
- the amorphous structure of the metal glasses gives them particularly interesting properties: a very high mechanical strength, a large capacity of elastic deformation, which is generally greater than 1, 5%, a high resistance to corrosion and abrasion.
- Zr zirconium
- Mg magnesium
- Fe iron
- Cu copper
- Al aluminum
- Pd palladium
- Pt platinum
- Ti titanium
- Co cobalt
- EP 0 875 318 discloses a device for injecting metal glasses, housed in a controlled atmosphere chamber, which comprises on the one hand a crucible which comprises a vertical cylindrical wall and whose bottom is formed by a face radial upper end of a vertical piston and on the other hand a mold which delimits an impression and a vertical channel of inj ection open down and in which is arranged an inner annular shoulder.
- the crucible is filled with a molten metal material under the effect of an induction coil placed around the vertical cylindrical wall of the crucible. Then, the crucible is moved upward 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 metal material into the mold cavity.
- US Patent 2007 / 0215306A1 discloses an injection device in which a metallic material is placed on an upper radial face of a slide disposed 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 upwardly the slide in the vertical cylindrical wall in order to inject the molten metal material in mold cavities laterally formed at the upper end of the vertical cylindrical wall.
- Patent JP 3784528 discloses an injection device which comprises a vertical injection piston provided in its upper part with a deep cylindrical recess receiving an entire metal element to be injected, so that the metal element to be injected is in contact not only 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 present invention is intended to avoid such disadvantages.
- an injection device for producing at least one piece of metal 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.
- the piston has an upper end face on which a metal element of a material capable of forming a metallic glass can be placed, 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 recessed shape adapted to receive a reduced lower portion of said metal element to maintain alone this placed element, so that the major part of said metal element is located above the face of end of the piston, outside the hollow form.
- the injection device further comprises a heating means which is located below the mold and which comprises coaxial induction coils to the piston, so that, in an intermediate position of the piston, the metal element is located mainly in the interior space to the induction coils.
- 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 crystal seeds, harmful to the structural quality of the final piece , would be confined in a limited volume to the lower portion of the element heated metal, which alone is attached to the piston, and the risk of the metal element being coiled on the piston is reduced.
- the piston may have, at its upper end, a peripheral chamfer, which may be frustoconical.
- Said hollow form may be spherical, conical or frustoconical.
- the injector chamber may have an inner bevel arranged in its lower entrance.
- An upper portion of the piston may be slidable vertically in the injection chamber of the mold forming a low sliding fit.
- the device may further comprise a sleeve disposed around an upper end portion of the piston and able to slide vertically relative to the piston, the piston and the sleeve having axial abutment means limiting the upward movement of the sleeve by relative to the piston and a spring urging upwards the sleeve with respect to the piston, said sleeve having an annular bearing face adapted to come into contact with an annular support surface of the mold situated at the periphery of said injector chamber; ection.
- Said sleeve may be slidable vertically with respect to said upper end portion of the piston by forming a low sliding fit.
- Said sleeve may have an upper annular face located approximately at the upper end face of the piston when said abutment means are in abutment.
- Said annular bearing surface of the sleeve and said annular support face of the mold may extend radially.
- Said annular bearing surface of the sleeve and said annular support face of the mold may be frustoconical.
- a portion of the sleeve may be adapted to enter an antechamber of the mold located below the injection chamber.
- the device may further comprise a heating means capable of melting the metal glass element placed on the face upper end of the piston, before its introduction into the injection chamber.
- the device may comprise means for heating at least an upper part of said vertical piston.
- heating said metal element by means of heating means located below the mold and comprising coaxial induction coils to the piston (8), so that in an intermediate position of the piston, the metal element is located in the interior space at the induction turns, said molten metal element being held on the upper end face of the piston under the effect of said recessed shape, and
- 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 can be mounted on the upper end portion of the piston, the sleeve and the upper portion of the piston forming between them a sliding fit with low sliding clearance and the sleeve and the mold may have annular support faces resting on each other during the injection of the metal 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 support faces bearing against one another.
- At least the upper part of said vertical piston can be heated.
- Figure 1 shows a vertical section of an injection device, in a low loading position
- Figure 2 shows in vertical section the injection device, in an intermediate heating position
- FIG. 3 represents in vertical section the injection device, in an intermediate injection position
- FIG. 4 shows in vertical section the injection device, in a final injection position
- FIG. 5 represents in vertical section an alternative embodiment of the injection device, in a low loading position
- Figure 6 shows in vertical section the injection device of Figure 5, in an intermediate heating position
- Figure 7 shows in vertical section the injection device of Figure 5, in an intermediate injection position
- Figure 8 shows in vertical section the injection device of Figure 5, in a final injection position
- Figure 9 shows in vertical section another alternative embodiment of the injection device, in a low loading position
- Figure 10 shows in vertical section the injection device of Figure 9, in an intermediate injection position
- Figure 11 shows a vertical section of an alternative embodiment of the injection device of Figure 5, in another final injection position
- FIG. 12 shows a vertical section of an alternative embodiment of the injection device of Figure 9, in another final injection position.
- An injection device 1 illustrated in FIGS. 1 to 4 comprises a mold 2 in which an internal cavity 3 is formed, the shape of which corresponds to the shape of a part to be produced, a cylindrical injection chamber 4, with an axis vertical 5, which opens downwards on the side of a horizontal outer lower face 6 of the mold 2 and an inner 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 may have a plurality of cavities 3 connected to the injection chamber 4 by internal channels.
- the injection device 1 comprises a vertical injection piston 8, for example a metallic one, which is arranged coaxially with the injection chamber 3, in a vertical direction 5, and which is vertically movable under the effect of means of injection. drive in translation (not shown) such as a cylinder 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 by forming a sliding fit with little clearance.
- the vertical piston 8 has, at the upper end of the upper cylindrical end portion 9, a peripheral outer bevel 10 and, optionally, the piston is long enough to provide sufficient flexibility to allow the portion 9 to slide in the chamber 4 despite defects. alignment.
- the injection chamber 4 could present, alternately or in addition, an annular inner bevel arranged in its lower inlet.
- the cylindrical upper end portion 9 of the vertical piston 8 has an upper end face 11 which has a hollow central shape 12 and a radial annular zone 13 between the recessed form 12 and the upper annular end of the chamfer 10.
- the recessed form 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 truncated cone-shaped, radial-bottomed pan. .
- the injection device 1 comprises a heating means 14 located below the mold 2, constituted for example by coaxial induction coils 15 to the vertical piston 8, wound for example in a cylinder or a truncated cone.
- the injection operations can be carried out in the following manner.
- the piston 8 occupies a low loading position in which its upper end face 11 is situated below and at a distance from the induction turns 15 of the heating means 14.
- a metal element 1 6 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 1 1 of the piston 8, in a situation such that the hollow form 12 receives a reduced lower portion of the metal element 16 and alone holds the metal element 1 6 placed, by 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 hollow form 12.
- the removal operation can be performed by a manipulator arm.
- the removal operation can be performed in the following manner.
- a containment ring is brought above and at a short distance from the upper face 11 of the piston 8, the lower end of an inclined gutter is brought above the space created by the confinement ring.
- a metal element 16 is deposited in an upper part of the gutter. The element 16 slides by gravity into the gutter and enters the space created by the containment ring that 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 striking the deposited metal element 16.
- the volume of the metal element 16 may be about one-tenth of a milliliter to three milliliters.
- the piston 8 is displaced upwardly to an intermediate position illustrated in FIG. 2, in which the metal element 16 is situated mainly in the interior space at the induction turns 15.
- the metal element 16 is heated until it goes to a molten state.
- the molten metal element 16 substantially takes the form of a sphere, generally flattened, which is supported and naturally takes a central position on the hollow form 12.
- the diameter of the cylindrical portion end 9 of the piston 8 is such that the metal element 16 in fusion does not project laterally.
- the molten metal element 16 is introduced from bottom to top 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 in 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 inner wall of the injection chamber 4, forming a sliding fit with low play, create a seal.
- the translational movement towards the top of the piston 8 creates a pressure in the injection chamber 4 which generates the injection of the molten metal glass 16 into the cavity 3 via the channel 7. Because of the adjustment sliding with a small clearance between the upper end portion of the piston in the injection chamber 4, the 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 reach, preferably, 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 may be substantially lower than the temperature of the metal element 16 heated, so that the metal element 16 does not adhere to the piston 8.
- the mold is equipped with controlled heating means and / or cooling (not shown) so that the material constituting the part 17 obtained in the cavity 3 does not crystallize and after extraction, the part 17 has the characteristics of a metallic glass, that is to say the characteristics an amorphous or at least partially amorphous or predominantly amorphous metal or metal alloy.
- the duration of the heating of the metal glass element 16 may be about thirty seconds and the duration of the movement of the piston 8 from its intermediate position to the injec- tion is short, for example about two seconds.
- the injection device 1 is placed inside a controlled atmosphere chamber, neutral vis-à-vis the metal glass used, or under vacuum.
- the piston 8 is moved down to its lower position and the mold 2, which includes mated parts, is opened to demold the part 17 obtained.
- the piston 8 is equipped with a cylindrical sleeve 1 8 around its upper end portion 8, able to slide vertically relative to one another by a slippery fit at low j had.
- the upward stroke of the sleeve 1 8 relative to the piston 8 is limited by means of axial abutment.
- the piston 8 is provided with an annular radial outer shoulder 1 9 oriented downwards and the sleeve 1 8 is provided with an annular radial inner shoulder 20 located below the shoulder 19 of the piston 8 and facing up.
- the sleeve 1 8 is urged upwardly relative to the piston 8 in the direction of the approach of the shoulders 19 and 20.
- a coil spring 21 is mounted around the piston 8 and is interposed axially between a radial annular face 22 of the sleeve 18 and an annular radial outer shoulder 23 of the piston 8.
- the piston For the mounting of the sleeve 1 8 and the spring 21, the piston comprises a lower portion 8a provided with the annular shoulder
- the sleeve 1 8 has a radial upper annular face
- the sleeve 18 is arranged and behaves in the following manner.
- the shoulders 19 and 20 are in contact under the effect of the spring 21.
- the sleeve is in a high position relative to to the piston 8.
- the upper radial annular surface 24 of the sleeve 18 is located approximately at the same level as the upper end face 11 of the 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 rise 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 put into position. melting in the intermediate position of the piston 8 illustrated in Figure 6, corresponding to Figure 2, and subsequently.
- the existence of the sleeve 18, the upper face 24 is located vertically at or in the vicinity of the end 11 of the piston 8, does not affect the operation of melting of the metal element 16 under the effect of the induction coils 15.
- the piston 8 continues its translational movement upwards in the injection chamber 4 in order to inject the metal 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 by compressing the spring 21 and the shoulders 19 and 20 'moving away from each other.
- the sleeve 18 resumes its upward position relative to the piston 8.
- the sleeve 18 is replaced by a sleeve 25 which differs from the sleeve 18 in that its upper portion 25a has a frustoconical peripheral annular surface 26, converging upwardly.
- the mold 2 has an inlet antechamber 27 which is located below the injection chamber 4 and whose peripheral wall has a frustoconical inner annular surface 28 situated at the periphery of the injection chamber 4 and converging towards this last.
- 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 vertex angle of these frustoconical shapes possibly being between ten and sixty degrees.
- the radial upper end face 24 of the sleeve 25 is at a small 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 . Then, the sleeve 25 slides relative to the piston 8 which enters the injection chamber 4 to inject the metal glass element 16 placed on the piston 8 as described above.
- FIG. 11 illustrates an alternative embodiment and arrangement of that described above with reference to FIG. 8.
- the cylindrical peripheral wall of the cylindrical upper end portion 9 does not penetrate into the injection chamber 4. Only one end portion of the end portion 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 facing the upper end chamfer 10 of the piston 8.
- an alternative embodiment and arrangement equivalent to that described above with reference to FIG. 11 may be applied to the final disposition according to the variant embodiment described with reference to FIGS. 9 and 10 in which the sleeve 25 carried by the piston 8 has a frustoconical upper portion 29 engaged in a frustoconical antechamber 28 of the mold 2.
- the chamfer end device 1 0 of the piston 8 in the final injection position, 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 a heating means for at least an upper part of said vertical piston 8, so that the material constituting the metal element 16 does not cool or come into contact with the hollow form. 12, especially during the aforementioned injection phase, so that the metallic material maintains its molten state and that the metallic material remaining in the chamber 4 maintains its molten state until the imprint 3 is not correctly and completely filled with the molten metal 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 1 6 is placed.
- This heating means can comprise induction or resistive turns placed around the portion 8a of the piston 8 or be formed by a heating fluid flowing in channels arranged in the piston 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1755186A FR3067269B1 (fr) | 2017-06-09 | 2017-06-09 | Dispositif et procede d'injection pour la production d'au moins une piece en un verre metallique |
| PCT/EP2018/064562 WO2018224418A1 (fr) | 2017-06-09 | 2018-06-04 | Dispositif et procédé d'injection pour la production d'au moins une pièce en un verre métallique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3634666A1 true EP3634666A1 (fr) | 2020-04-15 |
| EP3634666B1 EP3634666B1 (fr) | 2021-03-31 |
Family
ID=59746083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18727029.3A Active EP3634666B1 (fr) | 2017-06-09 | 2018-06-04 | Dispositif et procédé d'injection pour la production d'au moins une pièce en un verre métallique |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US11465198B2 (fr) |
| EP (1) | EP3634666B1 (fr) |
| FR (1) | FR3067269B1 (fr) |
| WO (1) | WO2018224418A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3141867B1 (fr) | 2022-11-16 | 2024-10-25 | Vulkam | Dispositif d’injection pour alliage métallique amorphe |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (ja) * | 1997-05-01 | 2006-08-09 | Ykk株式会社 | 金型で加圧鋳造成形された非晶質合金成形品の製造方法及び装置 |
| US5954116A (en) * | 1997-08-22 | 1999-09-21 | Buhler Ag | Shot sleeve and shot unit for a die casting machine |
| JP3784528B2 (ja) | 1998-03-05 | 2006-06-14 | 三菱伸銅株式会社 | 表面処理金属材料およびその製造方法 |
| JP3784578B2 (ja) * | 1999-05-19 | 2006-06-14 | Ykk株式会社 | 金型で加圧鋳造成形された非晶質合金成形品の製造方法及び装置 |
| JP2004114058A (ja) * | 2002-09-24 | 2004-04-15 | Ube Machinery Corporation Ltd | 半凝固金属の成形方法と射出装置 |
| JP4688145B2 (ja) | 2005-06-09 | 2011-05-25 | 日本碍子株式会社 | ダイキャスト装置及びダイキャスト方法 |
| JP2012110934A (ja) * | 2010-11-25 | 2012-06-14 | Ryobi Ltd | 縦射出ダイカスト装置及びダイカスト法 |
| US8356655B2 (en) * | 2011-02-09 | 2013-01-22 | United Technologies Corporation | Shot tube plunger for a die casting system |
| US9457399B2 (en) * | 2012-04-16 | 2016-10-04 | Apple Inc. | Injection molding and casting of materials using a vertical injection molding system |
-
2017
- 2017-06-09 FR FR1755186A patent/FR3067269B1/fr active Active
-
2018
- 2018-06-04 US US16/620,418 patent/US11465198B2/en active Active
- 2018-06-04 EP EP18727029.3A patent/EP3634666B1/fr active Active
- 2018-06-04 WO PCT/EP2018/064562 patent/WO2018224418A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3067269B1 (fr) | 2022-03-18 |
| US11465198B2 (en) | 2022-10-11 |
| FR3067269A1 (fr) | 2018-12-14 |
| WO2018224418A1 (fr) | 2018-12-13 |
| EP3634666B1 (fr) | 2021-03-31 |
| US20200222976A1 (en) | 2020-07-16 |
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