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1. WO2022048983 - METHOD FOR MANUFACTURING A PART MADE OF HARD MATERIAL WITH A POLYMER INSERT

Publication Number WO/2022/048983
Publication Date 10.03.2022
International Application No. PCT/EP2021/073582
International Filing Date 26.08.2021
IPC
G04B 3/04 2006.1
GPHYSICS
04HOROLOGY
BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
3Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously
04Rigidly-mounted keys, knobs, or crowns
G04B 37/22 2006.1
GPHYSICS
04HOROLOGY
BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
37Cases
22Materials or processes of manufacturing pocket watch or wrist watch cases
G04B 37/06 2006.1
GPHYSICS
04HOROLOGY
BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
37Cases
06Forming the passage for the winding stem through the case; Divided winding stems
A44C 27/00 2006.1
AHUMAN NECESSITIES
44HABERDASHERY; JEWELLERY
CJEWELLERY; BRACELETS; OTHER PERSONAL ADORNMENTS; COINS
27Making jewellery or other personal adornments
B44C 5/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
44DECORATIVE ARTS
CPRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
5Processes for producing special ornamental bodies
CPC
A44C 27/00
AHUMAN NECESSITIES
44HABERDASHERY; JEWELLERY
CPERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
27Making jewellery or other personal adornments
B22F 2003/1042
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
10Sintering only
1042with support for articles to be sintered
B22F 5/06
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
5Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
06of threaded articles, e.g. nuts
B22F 7/06
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
7Manufacture 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
06of composite workpieces or articles from parts, e.g. to form tipped tools
B28B 1/24
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
1Producing shaped ; prefabricated; articles from the material
24by injection moulding
B28B 7/303
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
7Moulds; Cores; Mandrels
28Cores; Mandrels
30adjustable, collapsible, or expanding
303specially for making undercut recesses or continuous cavities the inner section of which is superior to the section of either of the mouths
Applicants
  • COMADUR SA [CH]/[CH]
Inventors
  • AREDE, Paulo
  • CARTIER, Damien
  • BRUTILLOT, Alexandre
  • VUILLE, Pierry
Agents
  • ICB SA
Priority Data
20194714.004.09.2020EP
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR MANUFACTURING A PART MADE OF HARD MATERIAL WITH A POLYMER INSERT
(FR) PROCEDE DE FABRICATION D'UNE PIECE EN MATERIAU DUR AVEC UN INSERT EN POLYMERE
Abstract
(EN) The invention relates to a method for manufacturing an ornamental part, for example a timepiece, jewellery or telephone part, in particular a watch crown, the part at least partially comprising a hard material having a Vickers hardness greater than 1000 HV, characterised in that the method comprises the following main steps: - a step of producing a precursor from a mixture of at least one powdered material with a binder, - a step of producing an insert (11) made of polymer material, the insert (11) at least partially having a shape that is the negative of that desired for at least one portion of the part, - a step of overmoulding the precursor on the insert (11) made of polymer material by injection into a mould in order to form a green body (10), and a step of sintering the green body (10) in order to form a body of the future part in this hard material.
(FR) L'invention concerne un procédé de fabrication d'une pièce d'ornement, par exemple d'horlogerie, de bijouterie ou de téléphonie, notamment une couronne de montre, la pièce comprenant au moins en partie un matériau dur présentant une dureté Vickers supérieure à 1000 HV, caractérisé en ce que le procédé comprend les principales étapes suivantes : - une étape de réalisation d'un précurseur à partir d'un mélange d'au moins un matériau en poudre avec un liant, - une étape de réalisation d'un insert (11) en matériau polymère, l'insert (11) ayant au moins en partie une forme en négatif de celle souhaitée pour au moins une partie de la pièce, - une étape de surmoulage du précurseur sur l'insert (11) en matériau polymère par injection dans un moule afin de former un corps vert (10), et une étape de frittage dudit corps vert (10) afin de former un corps de la future pièce dans ledit matériau dur.
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