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8. WO2011141796 - PROCESS FOR THE MANUFACTURE OF SINTERED PRODUCTS

Publication Number WO/2011/141796
Publication Date 17.11.2011
International Application No. PCT/IB2011/000990
International Filing Date 10.05.2011
Chapter 2 Demand Filed 06.03.2012
IPC
B22F 3/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
22for producing castings from a slip
CPC
B22F 3/02
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
02Compacting only
B22F 3/222
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
22for producing castings from a slip
222by freeze-casting or in a supercritical fluid
B29C 45/0001
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
0001characterised by the choice of material
Applicants
  • K4SINT S.R.L. [IT]/[IT] (AllExceptUS)
  • CASARI, Francesco [IT]/[IT] (UsOnly)
  • GIRARDINI, Luca [IT]/[IT] (UsOnly)
  • ZADRA, Mario [IT]/[IT] (UsOnly)
Inventors
  • CASARI, Francesco
  • GIRARDINI, Luca
  • ZADRA, Mario
Agents
  • BRUNACCI, Marco
Priority Data
MO2010A00014514.05.2010IT
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) PROCESS FOR THE MANUFACTURE OF SINTERED PRODUCTS
(FR) PROCESSUS DE FABRICATION DE PRODUITS FRITTÉS
Abstract
(EN)
The process for the manufacture of sintered products (5), comprising the steps of: mixing a sinterable powder material (1), a liquid carrier (2) and a gelling agent (3) to form a mix (4) for the manufacture of a sintered product (5), the gelling agent (3) having a gelling temperature below which the mix (4) is substantially rigid and a sol temperature above which the mix (4) is substantially fluid; introducing the mix (4) into a forming mould (6) having filtering means (7) suitable for being crossed at least by the liquid carrier (2) and trapping at least the sinterable powder material (1); applying a pressure in the forming mould (6) with the mix (4) which has a temperature substantially higher than the gelling temperature and is substantially fluid, applying a pressure being suitable for allowing the liquid carrier (2) to come out at least partially from the forming mould (6) through the filtering means (7); lowering the temperature of the mix (4) in the forming mould (6) below the gelling temperature to obtain a substantially rigid semi-finished product (8); sintering the semi-finished product (8) to obtain the sintered product (5).
(FR)
Processus de fabrication de produits frittés (5), comprenant les étapes consistant à: mélanger une matière en poudre (1) pouvant être frittée, un support liquide (2) et un gélifiant (3) pour former un mélange (4) pour la fabrication d'un produit fritté (5), le gélifiant (3) ayant une température de gélatinisation en dessous de laquelle le mélange (4) est sensiblement rigide et une température de sol au-dessus de laquelle le mélange (4) est sensiblement fluide; introduire le mélange (4) dans un moule de formage (6) comportant un moyen de filtrage (7) convenant pour être traversé par le support liquide (2) et piéger au moins la matière en poudre (1) pouvant être frittée; appliquer une pression dans le moule de formage (6) contenant le mélange (4), qui a une température sensiblement plus élevée que la température de gélatinisation et est sensiblement fluide, l'application de cette pression convenant pour permettre au support liquide (2) de sortir au moins en partie du moule de formage (6) par le moyen de filtrage (7); abaisser la température du mélange (4) dans le moule de formage (6) en dessous de la température de gélatinisation pour obtenir un produit semi-fini (8) sensiblement rigide; fritter le produit semi-fini (8) pour obtenir le produit fritté (5).
Also published as
Latest bibliographic data on file with the International Bureau