EP4282557A1 - Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks - Google Patents

Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks Download PDF

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Publication number
EP4282557A1
EP4282557A1 EP22175517.6A EP22175517A EP4282557A1 EP 4282557 A1 EP4282557 A1 EP 4282557A1 EP 22175517 A EP22175517 A EP 22175517A EP 4282557 A1 EP4282557 A1 EP 4282557A1
Authority
EP
European Patent Office
Prior art keywords
parts
mold
molding cavity
amorphous
metal
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.)
Pending
Application number
EP22175517.6A
Other languages
English (en)
French (fr)
Inventor
Coline JIGUET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP22175517.6A priority Critical patent/EP4282557A1/de
Publication of EP4282557A1 publication Critical patent/EP4282557A1/de
Pending legal-status Critical Current

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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
    • B22D17/2015—Means for forcing the molten metal into the die
    • 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
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • B22D17/12—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with vertical press motion
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2209—Selection of die materials
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/229—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies with exchangeable die part
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/24—Accessories for locating and holding cores or inserts
    • 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

Definitions

  • the present invention relates to the manufacture of amorphous or partially amorphous metal parts.
  • Amorphous metals also called metallic glasses, have particularly interesting properties, notably a high elastic limit, great resistance to wear and fatigue (due to the absence of grains), great hardness and good resistance. chemical. These properties can advantageously be exploited in different kinds of applications, particularly in watchmaking.
  • the present invention aims to improve the manufacturing precision of amorphous or partially amorphous metal parts.
  • FIG. 1 shows an apparatus 1 for the manufacture of micromechanical parts in amorphous or partially amorphous metal according to a particular embodiment of the invention.
  • This device 1 is based on the teaching of the patent application US 2021/0276079 and most of its elements are taken from the embodiment of Figure 1a of said patent application.
  • This device 1 comprises, inside a housing 2, a mold 3 whose body is in two parts 4, 5 movable relative to each other.
  • a first relative position of the parts 4, 5 (closed position, which is the position illustrated in figure 1 )
  • the two parts 4, 5 are against each other and form between them a molding cavity 17.
  • a second relative position of the parts 4, 5 (open position, not shown)
  • the two parts 4, 5 are spaced from each other and the mold 3 is thus open, which makes it possible to unmold the material shaped and solidified in the molding cavity 17.
  • the movement of the parts 4, 5 is ensured by rods 6, 7 actuated by motors 8, 9 in the direction of the double arrows 10, 11. This movement is horizontal in the example illustrated but it could be vertical as also shown in the patent application US 2021/0276079 .
  • the mold 3 is cooled by a cooling device (not shown) using a cooling fluid such as water, air and/or oil and comprising for example internal conduits for the flow of the cooling fluid.
  • a cooling fluid such as water, air and/or oil and comprising for example internal conduits for the flow of the cooling fluid.
  • the body of the mold 3 is made of a material having good thermal conductivity, for example steel, copper or copper alloy, preferably copper or copper alloy. copper.
  • the cooling device can be the mold 3 itself and its environment arranged for sufficiently rapid heat dissipation.
  • a feeding device 29 is arranged to deposit metal granules 15 on the exterior surface 12 of the mold 3, opposite an orifice 16 which communicates the molding cavity 17 with the exterior of the mold 3, in a zone melting temperature 13.
  • Each granule 15 deposited on the mold 3 is heated by a heating device 31 beyond and even well beyond its melting temperature.
  • the heating device 31 comprises an electrode 32, typically made of tungsten, movable inside the housing 2 by a motor 33 in the direction of the double arrow 34 and can thus approach the fusion zone 13 or move away from it .
  • an electric arc is formed between it and the granule to melt the latter and heat it to a temperature between 75 and 1300 ° C above of its melting temperature.
  • the housing 2, the mold 3 and the granule 15 are electrically connected to form the counter electrode of the electrode 32.
  • the electrode 32 After fusion, the electrode 32 returns to a position (ie that illustrated in the figure 1 ) distant from the fusion zone 13.
  • the fusion of the metal could however be obtained in another way than by an electric arc, for example by means of a laser beam and/or an electron beam.
  • the two parts 4, 5 of the body of the mold 3 are separated and the part resulting from the solidification of the metal is removed from the mold 3 and from the housing 2 through an airlock 37.
  • the entire process described above can then start again with a new metal granule 15 deposited by the feed device 29 on the mold 3 in the fusion zone 13.
  • the cooling of the mold 3 is such that it quickly drops the temperature of the metal in the molding cavity 17 to a value below the glass transition temperature.
  • the cooling rate is greater than a critical cooling rate to prevent the metal from crystallizing. The latter therefore retains its amorphous state during its solidification.
  • a degasser 35 consisting for example of a titanium plate, can be provided inside the housing 2. This degasser 35 can be heated before melting the metal in order to eliminate oxygen residues inside the housing 2.
  • the molten metal could be introduced into the molding cavity 17 by simply allowing it to flow through the orifice 16 under the effect of gravity.
  • a rigid part of amorphous metal for example a toothed wheel or an escapement member (for example an escapement wheel, an anchor, a balance plate or a plate pin), may have the same robustness as a part corresponding rigid crystalline metal of larger size.
  • one or more intermediate elements 50 are interposed between the two parts 4, 5 of the body of the mold 3.
  • This or these intermediate elements 50 illustrated in figure 2 and represented schematically by dotted lines at the figure 1 , are in the form of hollowed-out plates produced at least in part using the LIGA process (lithography, electroplating, electroforming).
  • the recesses 51 of the intermediate elements 50 together constitute at least part of the molding cavity 17. These recesses 51 may be through or not.
  • these recesses 51 together define at least the peripheral surface (periphery) of the part to be manufactured, the upper and lower surfaces of the part being defined by the two parts 4, 5 when the recesses 51 are through.
  • intermediate elements 50 By superimposing the intermediate elements 50, it is possible to produce very thick parts and/or three-dimensional parts. Three-dimensional parts can also be obtained by using a single intermediate element 50 produced on several levels using the 2.5D or 3D type LIGA process. Such an intermediate element at several levels has the advantage of increasing manufacturing precision by avoiding having to align several intermediate elements.
  • the intermediate element(s) 50 are removable and can thus be replaced in the event of wear or to manufacture parts of a different shape. This avoids having to replace the entire mold 3, which can be very expensive.
  • the/each intermediate element 50 is formed by LIGA on one of the two parts 4, 5 used as support for electroforming.
  • the intermediate element(s) 50 are produced by laser cutting rather than by LIGA.
  • High machining precisions can in fact be obtained by laser on such elements.
  • LIGA and laser cutting can also be combined.
  • the mold 3 may comprise several molding cavities 17 and corresponding intermediate elements 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP22175517.6A 2022-05-25 2022-05-25 Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks Pending EP4282557A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22175517.6A EP4282557A1 (de) 2022-05-25 2022-05-25 Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22175517.6A EP4282557A1 (de) 2022-05-25 2022-05-25 Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks

Publications (1)

Publication Number Publication Date
EP4282557A1 true EP4282557A1 (de) 2023-11-29

Family

ID=81850057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22175517.6A Pending EP4282557A1 (de) 2022-05-25 2022-05-25 Gerät zur herstellung eines werkstücks aus amorphem metall und verfahren zur herstellung eines solchen werkstücks

Country Status (1)

Country Link
EP (1) EP4282557A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001009563A (ja) * 1999-06-30 2001-01-16 Sanyo Electric Co Ltd 金属成形金型およびその製法ならびに金属成形方法
US20190262896A1 (en) * 2015-11-18 2019-08-29 The Swatch Group Research And Development Ltd Method for manufacturing an amorphous metal part
WO2020031821A1 (ja) * 2018-08-10 2020-02-13 広島アルミニウム工業株式会社 ダイカスト用金型
US20210181679A1 (en) * 2017-12-22 2021-06-17 The Swatch Group Research And Development Ltd Balance for timepieces and method for manufacturing the same
US20210276079A1 (en) 2018-06-29 2021-09-09 Amorphous Metal Solutions GmbH Apparatus and method for producing a cast part formed from amorphous or partially amorphous metal, and cast part

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001009563A (ja) * 1999-06-30 2001-01-16 Sanyo Electric Co Ltd 金属成形金型およびその製法ならびに金属成形方法
US20190262896A1 (en) * 2015-11-18 2019-08-29 The Swatch Group Research And Development Ltd Method for manufacturing an amorphous metal part
US20210181679A1 (en) * 2017-12-22 2021-06-17 The Swatch Group Research And Development Ltd Balance for timepieces and method for manufacturing the same
US20210276079A1 (en) 2018-06-29 2021-09-09 Amorphous Metal Solutions GmbH Apparatus and method for producing a cast part formed from amorphous or partially amorphous metal, and cast part
WO2020031821A1 (ja) * 2018-08-10 2020-02-13 広島アルミニウム工業株式会社 ダイカスト用金型

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