Heat treating and removing cores from castings

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 29/04 (2006.01) B22D 29/00 (2006.01) C21D 1/52 (2006.01) C21D 9/08 (2006.01) F27B 9/00 (2006.01)

Patent

CA 2176364

Waste gases generated in the process of manufacturing cores and castings are collected and inventively routed to a heat treating furnace (12) for incineration. Additionally, as a portion of the waste gas is being routed, it is put to use in the reclaiming of uncured scrap materials and the reclaiming of sand within the furnace. Additionally, provisions are made for decreasing the height of the furnace by decreasing the height of hoppers therein and increasing the size of the base of the hoppers to maintain proper flow of reclaimed sand and portions of core materials being reclaimed therein toward the base of the hopper. Multiple fluidizers (18) are employed in the base of the hopper to accomodate for the increased size of the base of the hopper and maintain optimum flow of materials toward the base and optimum fluidization of the materials within the hopper.

Les gaz perdus produits par le processus de fabrication de noyaux et de pièces coulées sont collectés et acheminés, selon la présente invention, dans un four (12) de traitement thermique pour incinération. De plus, lors de son acheminement, une partie des gaz perdus est utilisée pour récupérer les déchets métalliques non durcis et récupérer le sable au sein du four. En outre, on a prévu de diminuer la hauteur du four en diminuant la hauteur des trémies situées à l'intérieur du four, et d'augmenter la taille de la base des trémies pour maintenir un flux adéquat de sable récupéré et de parties de noyau récupérées dans lesdites trémies, vers la base de la trémie. Des dispositifs de fluidification multiples (18) sont employés dans la base de la trémie pour compenser la taille accrue de la base de la trémie et maintenir un flux optimal de matériaux vers la base et une fluidification optimale des matériaux dans la trémie.

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