EP4208758A1 - Procede de fabrication d'une piece en materiau dur avec un insert en polymere - Google Patents
Procede de fabrication d'une piece en materiau dur avec un insert en polymereInfo
- Publication number
- EP4208758A1 EP4208758A1 EP21769111.2A EP21769111A EP4208758A1 EP 4208758 A1 EP4208758 A1 EP 4208758A1 EP 21769111 A EP21769111 A EP 21769111A EP 4208758 A1 EP4208758 A1 EP 4208758A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insert
- green body
- hard material
- polymer
- order
- 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
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
- G04B3/04—Rigidly-mounted keys, knobs or crowns
- G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/06—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of threaded articles, e.g. nuts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
- B28B7/303—Cores; Mandrels adjustable, collapsible, or expanding specially for making undercut recesses or continuous cavities the inner section of which is superior to the section of either of the mouths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/06—Forming the passage for the winding stem through the case; Divided winding stems
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
- G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
- G04B37/225—Non-metallic cases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F2003/1042—Sintering only with support for articles to be sintered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/007—Hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/739—Horology; Equipment therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6022—Injection moulding
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6028—Shaping around a core which is removed later
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Definitions
- the invention relates to the field of the manufacture of ornamental parts, in particular in watchmaking, jewelery or telephony, the part being made of hard material. It relates more specifically to a process for manufacturing a watch part, for example a crown or a middle part, with an insert made of polymer material.
- hard material we mean materials having a Vickers hardness greater than 1000 HV.
- Such hard materials are for example ceramic, silicon nitride, zirconium oxide, sapphire, or alumina.
- the ornamental parts are obtained after an injection step giving the desired shape to the part, then by a sintering step to harden the material.
- the present invention provides this type of process. Thanks to the use of a hard material and an insert made of polymer material, the process makes it possible to avoid the direct machining of the hard material. Thus, the cost of manufacturing the part is reduced by avoiding machining the hard material as much as possible. In addition, this makes it possible to create holes with the chosen dimensions, with a thread if necessary.
- the invention relates to a process for manufacturing a part, for example for watchmaking, jewelery or telephony, in particular a watch middle, the part comprising at least in part a hard material having a Vickers hardness greater than 1000 HV.
- the method comprises the following main steps:
- the method comprises an additional step of eliminating the polymer insert in order to obtain a part provided with a part having a predetermined shape, this step preceding the sintering step.
- the method comprises an additional step of assembling the part.
- the method comprises a step of machining the green body.
- the overmolding step consists of overmolding the green body on an insert partly inserted into the green body in order to create a hole there.
- the overmolding step consists in overmolding the green body around the insert in order to create a closed cavity therein.
- the insert comprises a thread in order to create a thread in the green body.
- the polymer is to be chosen from the following list: PVB (for plasticized Polyvinyl Butyral), CAB (for Plasticized Cellulose Acetate Butyrate), acrylic resin of the PBMA type (for Poly butyl methacrylate).
- the hard material is to be chosen from materials such as silicon nitride, zirconium oxide, alumina, cermets, metals or composites of these metals.
- the invention also relates to an ornamental part, for example of watchmaking, jewelery or telephony, in particular a watch middle, comprising a body of hard material having a Vickers hardness greater than 1000 HV, the part being provided with a closed cavity in the thickness of the body.
- the invention also relates to a watch case comprising such an ornamental piece, as well as a crystal and a bezel to hold the crystal on the piece, and a bottom to close the watch case.
- FIG. 1 is a block diagram representing the process according to the invention
- FIGS. 3a) and 3b) represent perspective views of a watch middle part provided with a tapped hole obtained by means of the method according to the invention
- FIG. 4 shows a sectional view of a crown mounted on a watch case
- FIG. 5 shows a perspective view of a bracelet link obtained using the method according to the invention
- FIGS. 7a) and 7b) show sectional views of a watch case provided with a closed cavity obtained by the method according to the invention.
- the manufacturing method 1 of an ornamental piece 10, for example of watchmaking, jewelery or telephony, is represented in FIG.
- the ornamental piece is, for example, a watch case middle, a bezel, a watch case back, a stone or a timepiece pusher, a jewelry ring or bracelet, or even a telephone case. mobile.
- Part 10 comprises at least in part a hard material having a Vickers hardness greater than 1000 HV.
- the hard material is, for example, a ceramic material such as an aluminum oxide (Al2O3), a zirconium oxide (ZrO2), a carbide, a nitride, a cermet, a hard metal or any other Vickers hardness material. greater than 1000 HV.
- Method 1 comprises a first step 2 of producing a precursor from a mixture of at least one powdered material with a binder.
- the ceramic-based powder can comprise at least one metal oxide, a metal nitride or a metal carbide.
- the ceramic-based powder may comprise aluminum oxide or a mixture of aluminum oxide and chromium oxide in order to form synthetic ruby, zirconium oxide, which may be optionally pigmented, alumina, which may be optionally pigmented, silicon nitride, cermets, metals and composites of these metals.
- the cermets are for example titanium carbide or tungsten carbide.
- the metals are for example tungsten, titanium, 316L stainless steel or steel, preferably without nickel.
- the binder is of the organic type.
- Method 1 comprises a second step 3 of producing an insert made of polymer material, the insert having at least in part a shape negative of that desired for at least part of the part.
- the insert has at least one part in the negative shape of that desired for a part of the final hard material body.
- the polymer is for example chosen from the following list: PVB (for plasticized Polyvinyl Butyral), CAB (for Plasticized Cellulose Acetate Butyrate), acrylic resin of the PBMA type (for Polybutyl methacrylate).
- a third step 4 consists in overmolding the precursor on the insert in polymer material in order to form a green body.
- Overmolding is in particular carried out by injection into a mould.
- the mold has at least partly the shape of the desired part given a shrinkage coefficient of the part.
- the precursor is injected into the mold through a tube, then through precursor distribution circuits throughout the mold.
- the precursor thus takes the shape of the mould, for example a watch case middle as in the examples described in the application.
- injection can also be carried out by circular layer or by channels.
- the green body takes the shape of the mold and at least n part of the shape of the insert on which it is overmolded.
- the green body is machined to eliminate unnecessary parts of the green body produced by the injection. For example, tubing or channels formed because of the tube or distribution circuits of the injection system are eliminated. Thus, a machined green body is obtained.
- the polymer insert is removed by thermal debinding.
- the green body overmoulded on the insert is immersed in an alcohol bath at 80°. The alcohol bath dissolves the polymer insert, so that the green body is obtained with the desired shape given by the insert.
- thermal debinding can be carried out to remove the polymer insert.
- the body overmoulded on the insert is thus heated to high temperature to make the polymer disappear. The green body is therefore freed from the polymer insert.
- the insert leaves a positive shape in the green body, like a tapped hole.
- the sixth step 7 has the function of sintering said machined green body in order to form a body of the future part in said at least one hard material.
- Sintering consists of heating the precursor so that the powder grains agglomerate.
- the green body hardens by shrinking to result in a hard body with a sintering coefficient.
- the sintering step may include pyrolysis.
- the resulting part body is substantially hardened by this step.
- the body of the piece has a definite shape.
- a seventh step 8 may also be necessary to carry out satin finishing and/or polishing of the hard material. This improves the aesthetic appearance of the middle.
- the part is assembled with other elements, for example by screwing, thanks to the shape obtained by the process.
- the part is a watch case middle with a tapped hole, a button or a crown is assembled to the case middle.
- FIGS. 2a) to 2c a green body 10 and an insert 11 are shown making it possible to produce a crown after certain stages of the method.
- an insert 11 is obtained having a preferred shape, such as that of FIG. 2a).
- the insert 11 is a cylindrical element provided with a first 12 and a second 13 section, the second section 13 being intended to give an internal shape to the green body 10.
- the second section 13 is narrower than the first 12 and has a thread 14 on its periphery.
- the insert 11 makes it possible to form a cylindrical hole 15 in the green body 10, the hole 15 being provided with a thread 16 on the internal peripheral wall of the Crown.
- the finished part can be screwed during the assembly stage.
- the precursor is overmolded on the insert 11, so that an assembly is obtained as shown in Figure 2b).
- a green body 10 in the shape of a watch crown has been formed on the insert 11 .
- the crown is cylindrical and has a thicker portion 17 at one end.
- the green body 10 is molded over the second section 13 of the insert 11, so that the second section 13 of the insert 11 is pressed into the green body 10.
- a hole 15 is formed in the green body 11 shown in Figure 2c).
- the thread 14 of the insert 11 has printed a thread 16 in the hole 15 of the green body 10.
- Figures 3a) and 3b) show another example of a part obtained using this process.
- the part is a middle part 20 provided with a tapped hole 22, which facilitates the assembly of a button for example, by screwing the latter into the hole.
- the hole 22 is arranged on the peripheral face 21 of the middle part. Enlarging hole 22 in Figure 3b) allows you to see the thread inside.
- FIG. 4 shows another example of an ornamental piece obtained with the method according to the invention.
- a middle part 29 of a watch has a hole 35 provided with a thread 27 for screwing a tube 28 of crown 26 therein.
- Crown 26 comprises a tube 28 and a head 36 of crown 26 assembled together.
- the tube 28 comprises a thread 37 on its peripheral wall cooperating with the internal thread 27 of the hole 35.
- the middle part 20 with the threaded hole 35 is obtained thanks to the method according to the invention, in particular the threaded hole 35 is formed thanks to an insert in polymer.
- FIG. 5 Another example of an ornamental piece produced using the method according to the invention is a bracelet link or link 30, shown in FIG. 5.
- the link 30 is substantially flat and elongated.
- the link comprises a longitudinal through-opening 34 to house therein a pin for assembly to a watch middle.
- the link 30 has two tapped holes 31, 32, which allow the link 30 to be screwed to another link.
- the holes 31, 32 are obtained thanks to a polymer insert.
- the method also makes it possible to produce holes 31, 32 close to each other.
- FIGS. 6a) and 6b An example of a system 40 for implementing the step of overmolding the link 30 is represented in FIGS. 6a) and 6b).
- Two molds 41, 42 in the form of a link are represented, each mold 41, 42 being arranged at the end of a feed conduit 43, 44 of the precursor.
- a main duct 46 makes it possible to inject the precursor, which is distributed in the two feed ducts 43, 44 as far as the molds 41, 42.
- the molds 41, 42 have openings through which inserts 45 can be positioned.
- the inserts 45, close-up in Figure 6a) have a cylindrical shape, and are provided at least in part with a peripheral thread 47. The threaded part is inserted into the mold 41, 42 through an opening.
- the method according to the invention also makes it possible to overmold a green body 50 around an insert 51 in order to create a closed cavity 52 therein.
- closed we mean that the cavity is continuously surrounded by material, that of the body.
- the insert 51 is entirely surrounded by the precursor.
- the polymer insert is then eliminated during the elimination step in the same way as for a partially overmolded insert.
- FIG. 7a shows a green body 50 in the shape of a watch middle, an insert 51 being enveloped in the material of the middle. When the insert 51 has disappeared, a void 52 appears in the thickness of the material forming the caseband, as shown in figure 7b).
- Such a process makes it possible to lighten the part, and to save material used to manufacture it.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Thermal Sciences (AREA)
- Adornments (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20194714.0A EP3964895A1 (fr) | 2020-09-04 | 2020-09-04 | Procédé de fabrication d'une pièce en matériau dur avec un insert en polymère |
| PCT/EP2021/073582 WO2022048983A1 (fr) | 2020-09-04 | 2021-08-26 | Procede de fabrication d'une piece en materiau dur avec un insert en polymere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4208758A1 true EP4208758A1 (fr) | 2023-07-12 |
Family
ID=72422081
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20194714.0A Withdrawn EP3964895A1 (fr) | 2020-09-04 | 2020-09-04 | Procédé de fabrication d'une pièce en matériau dur avec un insert en polymère |
| EP21769111.2A Pending EP4208758A1 (fr) | 2020-09-04 | 2021-08-26 | Procede de fabrication d'une piece en materiau dur avec un insert en polymere |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20194714.0A Withdrawn EP3964895A1 (fr) | 2020-09-04 | 2020-09-04 | Procédé de fabrication d'une pièce en matériau dur avec un insert en polymère |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230264396A1 (fr) |
| EP (2) | EP3964895A1 (fr) |
| JP (1) | JP7529887B2 (fr) |
| CN (1) | CN116097179A (fr) |
| TW (1) | TWI810626B (fr) |
| WO (1) | WO2022048983A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4086711A1 (fr) * | 2021-05-07 | 2022-11-09 | Comadur S.A. | Support pour un procédé de frittage d'un corps, notamment pour l'horlogerie |
| DE102022114229B3 (de) | 2022-06-07 | 2023-10-26 | Porsche Lifestyle GmbH & Co. KG | Uhrengehäusegrundkörper, Uhr und Verfahren zur Herstellung einer Uhr |
| EP4668029A1 (fr) * | 2024-06-19 | 2025-12-24 | Comadur S.A. | Composant horloger ou de bijouterie en céramique |
| EP4741948A1 (fr) * | 2024-11-12 | 2026-05-13 | Rolex Sa | Composant horloger léger et robuste |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2485099A2 (fr) * | 2011-02-02 | 2012-08-08 | Richemont International S.A. | Procédé de production de carrure de boîte de montre de poids réduit |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2651864B2 (ja) * | 1988-04-29 | 1997-09-10 | ユケン工業株式会社 | 非可塑性材料の成形方法 |
| JP2517762B2 (ja) * | 1989-06-09 | 1996-07-24 | 信越化学工業株式会社 | 金属粉末射出成形用組成物 |
| US5242646A (en) * | 1992-05-07 | 1993-09-07 | Minnesota Mining And Manufacturing Company | Method of making an interengaging fastener member |
| US6502982B1 (en) * | 1998-06-05 | 2003-01-07 | Montres Rado Sa | Structural component made of hard material for a wristwatch |
| DE69823484T2 (de) * | 1998-06-08 | 2005-03-03 | Montres Rado S.A. | Bauteil aus Hartmaterial für eine Uhr |
| JP2000297334A (ja) * | 1999-04-14 | 2000-10-24 | Sekisui Chem Co Ltd | 焼結多孔質体の製造方法および焼結多孔質体 |
| JP2000340303A (ja) * | 1999-05-27 | 2000-12-08 | Orient Micro Wave:Kk | 金属ハウジング、同軸コネクタおよびその製造方法 |
| US6547210B1 (en) * | 2000-02-17 | 2003-04-15 | Wright Medical Technology, Inc. | Sacrificial insert for injection molding |
| KR20040090236A (ko) * | 2003-04-17 | 2004-10-22 | 최성조 | 극미세 귀금속 분말 소결체 |
| US20090127740A1 (en) | 2007-11-19 | 2009-05-21 | E.I. Du Pont De Nemours And Company | Use of polyamide compositions for making molded articles having improved adhesion, molded articles thereof and methods for adhering such materials |
| KR101052324B1 (ko) | 2011-03-23 | 2011-07-27 | 신한다이아몬드공업 주식회사 | 봉지재 성형 방법 |
| CN102351542B (zh) * | 2011-07-12 | 2012-12-05 | 中南大学 | 一种中空结构金属或陶瓷零部件的制备方法 |
| US9458064B2 (en) * | 2012-12-21 | 2016-10-04 | Rolex S.A. | Coloured technical ceramic bodies and method for obtaining the same |
| CH707475A1 (fr) * | 2013-01-17 | 2014-07-31 | Tih Sa Tech Et Innovation Horlogère | Procédé de fabrication d'un objet d'une forme choisie en matière céramique ou réfractaire. |
| CN105498555A (zh) * | 2014-09-24 | 2016-04-20 | 中国石油化工股份有限公司 | 热塑性高分子材料中空纤维微孔膜的生产方法 |
| EP3170579A1 (fr) | 2015-11-18 | 2017-05-24 | The Swatch Group Research and Development Ltd. | Procédé de fabrication d'une pièce en métal amorphe |
| CN105541324B (zh) * | 2015-12-15 | 2018-09-11 | 东莞信柏结构陶瓷股份有限公司 | 手机外壳的制备方法 |
| US10750831B2 (en) | 2017-07-28 | 2020-08-25 | Apple Inc. | Watchbands with hook and loop fasteners |
| EP3587625A1 (fr) * | 2018-06-28 | 2020-01-01 | Comadur S.A. | Procédé de fabrication de pièces décoratives |
-
2020
- 2020-09-04 EP EP20194714.0A patent/EP3964895A1/fr not_active Withdrawn
-
2021
- 2021-08-11 TW TW110129600A patent/TWI810626B/zh active
- 2021-08-26 EP EP21769111.2A patent/EP4208758A1/fr active Pending
- 2021-08-26 JP JP2023503436A patent/JP7529887B2/ja active Active
- 2021-08-26 CN CN202180054352.3A patent/CN116097179A/zh active Pending
- 2021-08-26 WO PCT/EP2021/073582 patent/WO2022048983A1/fr not_active Ceased
- 2021-08-26 US US18/006,604 patent/US20230264396A1/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2485099A2 (fr) * | 2011-02-02 | 2012-08-08 | Richemont International S.A. | Procédé de production de carrure de boîte de montre de poids réduit |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3964895A1 (fr) | 2022-03-09 |
| JP7529887B2 (ja) | 2024-08-06 |
| JP2023534522A (ja) | 2023-08-09 |
| TWI810626B (zh) | 2023-08-01 |
| TW202212293A (zh) | 2022-04-01 |
| CN116097179A (zh) | 2023-05-09 |
| WO2022048983A1 (fr) | 2022-03-10 |
| US20230264396A1 (en) | 2023-08-24 |
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