Method for production of a honeycomb seal

B - Operations – Transporting – 22 – F

Patent

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Details

B22F 3/22 (2006.01) B22F 5/00 (2006.01) B28B 11/00 (2006.01) F01D 11/12 (2006.01) F16J 15/44 (2006.01)

Patent

CA 2647473

The invention relates to a method for production of a honeycomb seal by powder metallurgical injection moulding. A metal powder and/or a ceramic powder is first mixed with a binder to give a homogeneous mass for the powder metallurgical injection moulding, a moulded body with honeycomb cells is subsequently produced from the homogeneous mass by injection moulding for the honeycomb seal, the moulded body is then subjected to a release process and finally compressed by sintering the moulded body to give the honeycomb seal with the desired geometrical properties. According to the invention, at least some of the cells of the moulded body are at least partly filled with at least one hollow body before sintering, wherein the moulded body is subsequently sintered together with the hollow bodies introduced into the cells.

L'invention concerne un procédé de fabrication d'une garniture d'étanchéité en nid d'abeilles par moulage par injection selon la métallurgie des poudres. Lors du moulage par injection selon la métallurgie des poudres, une poudre métallique et/ou une poudre céramique est d'abord mélangée à au moins un liant pour former une masse homogène. Ensuite, un corps moulé présentant des alvéoles en nid d'abeilles et destiné à former la garniture d'étanchéité en nid d'abeilles est fabriqué à partir de la masse homogène par moulage par injection, ce corps moulé étant ensuite soumis à un processus de déliantage puis comprimé par frittage en une garniture d'étanchéité en nid d'abeilles aux propriétés géométriques souhaitées. Selon la présente invention, au moins quelques-unes des alvéoles du corps moulé sont au moins partiellement remplies d'au moins un corps creux avant le frittage, ledit corps moulé étant ensuite fritté avec les corps creux introduits dans les alvéoles.

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