Equipment and process for producing ceramic tubes

Details Equipment and process for producing ceramic tubes Equipment and process for producing ceramic tubes

C - Chemistry, Metallurgy

04

B

C04B 35/622 (2006.01) B28B 3/00 (2006.01) B28B 21/18 (2006.01) B28B 21/20 (2006.01) B30B 11/00 (2006.01)

Patent

CA 2219465

Equipment for manufacturing ceramic tubes via isostatic pressing using the dry-bag method comprises a main cylinder (1), an elastomer sheath (2), a mould (50) mounted coaxially inside the sheath and comprising a central cylindrical cavity (6), two metal bands (90.100) attached to the upper and lower parts of the pot respectively to keep the mould and sheath in place, at least one punch (120) that is mobile in relation to the mould and works with one of the two bands, one rod (13) that is mobile in relation to the mould and the punch. At least one extremity of the mould had a concave conical surface (52) on the exact same axis as the mould extending as far as the mould's cylindrical cavity and which serves to support a conical surface complementing one of the bands. At the other end of the mould, a tubular section (121) coaxial to the mould is introduced into the mould's cylindrical cavity over part of the length of the cavity. This equipment makes it possible to obtain ceramic tubes of good concentricity.

L'outillage pour la fabrication de tubes en céramique par pressage isostatique selon la méthode "dry-bag" comprend un pot de presse (1), une gaine en élastomère (2), un moule (50) monté de façon coaxiale a l'intérieur de la gaine et comportant une cavité centrale cylindrique (6), deux bagues métalliques (90.100) fixées respectivement sur la partie supérieure et la partie inférieure du pot pour maintenir le moule et la gaine, au moins un poinçon (120) mobile par rapport au moule et coopérant avec une des deux bagues, une broche (13) mobile par rapport au moule et au poinçon. Au moins une extrémité du moule présente une surface conique concave (52) d'axe identique a l'axe du moule, qui s'étend jusqu'à la cavité cylindrique du moule et qui sert d'appui a une surface conique complémentaire d'une des bagues. A l'autre extrémité du moule, une pièce tubulaire (121) et coaxiale au moule vient s'introduire dans la cavité cylindrique du moule sur une partie de la longueur de cette cavité. Cet outillage permet d'obtenir des tubes en céramique ayant une bonne concentricité.

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