Norimat

Centre National De La Recherche Scientifique

Université Paul Sabatier (toulouse Iii)

Yannick Beynet

Florence Ansart

Claude Estournes

Romain Epherre

Pascal Lenormand

This invention relates to a method for manufacturing a part of complex shape () by successive deposition of layers according to a technique of 3D additive printing and pressure sintering, comprising the following steps: an initial step of producing a model () from a material chosen from a porous or pulverulent material based on a metal alloy, a ceramic, a composite material and a lost material by formation of successive layers deposited according to the digitally controlled 3D additive printing technique, followed by a step of introducing a preform () made of porous or pulverulent material to be densified, derived from the model (), into a mold () filled with a sacrificial porous or pulverulent material () in addition to the preform (), the uniaxial densifying pressure sintering () then being applied to the mold () in order to form the part () which is finally extracted from the mold ().

Method for manufacturing a part of complex shape by pressure sintering starting from a preform

A method for producing a counter-form () for manufacturing a part having a complex shape () by pressure sintering densification. The counter-form () is formed from successive layers produced by numerically-controlled three-dimensional (3D) additive printing according to the following steps: numerically recording a three-dimensional negative of the part to be produced () in a control unit of a three-dimensional additive printing system in order to constitute the positive form of the counter-form to be produced; producing the counter-form () using a 3D additive printing technique. The part having a complex shape () is then manufactured by pressure sintering, then separated from the counter-form which is also sintered ().

Method for producing a counter-form and method for manufacturing a part having a complex shape using such a counter-form

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Toulouse Occitaine, France

Yannick Beynet