B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
B22C 9/22 (2006.01) B22C 9/00 (2006.01)
Patent
CA 2541401
The invention relates to a method for producing a mould for moulding objects in a mouldable material consisting in using a pattern for objects to be moulded and in coating said pattern with a moulding material. The inventive method is characterised in that it also consists in using expanded graphite in the form of a moulding material, coating the pattern (3) with said expanded graphite, thereby forming a continuous expanded graphite layer or several separated expanded graphite layers (5, 6) distributed along the pattern, in pressing the expanded graphite layer(s) against the pattern in such a way that a consolidated graphite block impermeable for the mouldable material is formed for each layer. In another variant, the inventive method consists in using at least one pre-consolidated layer made of the expanded graphite which is re-compressed at least in one direction in such a way that the density thereof ranges from 30 to 50 kg/m3.
L'invention concerne un procédé de fabrication d'un moule pour le moulage d'objets en un matériau dit matériau a mouler, dans lequel on utilise un modèle des objets à mouler et on recouvre le modèle d'un matériau, dit matériau de moulage, caractérisé en ce qu'on utilise, à titre de matériau de moulage, du graphite expansé, on recouvre le modèle (3) de graphite expansé en formant une épaisseur continue de graphite expansé ou plusieurs épaisseurs (5, 6) séparées de graphite expansé réparties sur le modèle, puis on comprime la(les) épaisseur(s) de graphite expansé contre le modèle de façon à obtenir, pour chaque épaisseur, un bloc de graphite consolidé et imperméable au matériau à mouler. Une variante selon l~invention consiste à utiliser au moins une épaisseur pré-consolidée, de graphite expansé recomprimé selon au moins une direction de façon à présenter une densité comprise entre 30 et 50 kg/m3.
Da Silva Serge
Gros Pierre
Leguen Cedric
Prosdocimi Jacques
Puybouffat Sylvain
6t-Mic Ingenieries
Mcfadden Fincham
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