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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
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
22
for producing castings from a slip
B22F 3/22 (2006.01)
CPC
B22F 3/02
B22F 3/222
B29C 45/0001
Applicants
  • K4SINT S.R.L. [IT/IT]; Via Dante, 300 I-38057 Pergine Valsugana (TN), IT (AllExceptUS)
  • CASARI, Francesco [IT/IT]; IT (UsOnly)
  • GIRARDINI, Luca [IT/IT]; IT (UsOnly)
  • ZADRA, Mario [IT/IT]; IT (UsOnly)
Inventors
  • CASARI, Francesco; IT
  • GIRARDINI, Luca; IT
  • ZADRA, Mario; IT
Agents
  • BRUNACCI, Marco; Brunacci & Partners S.r.l. Via Scaglia Est, 19-31 I-41126 Modena, IT
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