Investment casting method and apparatus

Details Investment casting method and apparatus Investment casting method and apparatus

B - Operations, Transporting

22

D

B22D 19/00 (2006.01) A61F 2/28 (2006.01) B22C 7/02 (2006.01) B22C 9/04 (2006.01)

Patent

CA 2142637

A modified investment casting process is effective to more safely and efficiently produce cast articles. The casting process utilizes a solid, rigid riser tube, in place of a wax tree, upon which heat disposable, positive models of an article to be cast are joined. This assembly is coated with a refractory and after drying of the refractory the heat disposable positive models are removed. Thereafter the ceramic shell is heated and fired and molten casting material is poured into the assembly. The molten casting material flows from the riser tube to fill the cavities formerly occupied by the positive models. Upon cooling and solidification of the casting material, the refractory is fractured and cast parts are removed.

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