Process for preparing erosion resistant foundry shapes with...

Details Process for preparing erosion resistant foundry shapes with... Process for preparing erosion resistant foundry shapes with...

B - Operations, Transporting

22

C

B22C 9/12 (2006.01) B22C 1/22 (2006.01) B22C 9/00 (2006.01) B22D 23/00 (2006.01)

Patent

CA 2656275

This invention relates to a process for making foundry shapes (e.g. cores and molds) using epoxy-acrylate cold-box binders containing an oxidizing agent and elevated levels of an organofunctional silane, which are cured in the presence of sulfur dioxide, and to a process for casting metals using the foundry shapes. The metal parts have fewer casting defects because the foundry shapes made with the binder are more resistant to erosion.

L'invention concerne un procédé pour fabriquer des formes de fonderie (par exemple des noyaux et des moules) en utilisant des liants de boîte froide en époxy-acrylate qui contiennent un agent d'oxydation et des niveaux élevés de silane organofonctionnel, durcis en présence de dioxyde de soufre, et un procédé pour couler des métaux en utilisant les formes de fonderie. Les parties métalliques présentent moins de défauts de coulée car les formes de fonderie réalisées avec le liant sont plus résistantes à l'érosion.

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