Foundry sand core removal and recycle
AssigneeProcedyne Corp.
InventorsRonald Bonnemasou, Hugo J. d. F. Filho, Lauro da Costa, Karen Bickford, Anthony DiNunzi
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Abstract
Metal parts formed by casting in a foundry and which contain the sand cores used to form internal passages are cleared of the sand cores by subjecting them to temperatures sufficient to pyrolyze and/or combust the bonding agents holding the sand cores together, in a fluidized-bed furnace.
Claims12
A process to remove the sand cores from a metal part cast using granular sand bonded together with a chemical bonding agent to form the sand cores, which comprises;
- (a) placing the part in a bed of fluidized solid particles;
- and
- (b) heating the part in the fluidized bed to a temperature level sufficiently high to pyrolyze the sand core bonding agent whereby the sand cores debond and return to granular sand which can be poured from the part.
A process of removing a sand core from a metal part cast in a mold which includes a core which comprises granular sand bonded together with a chemical bonding agent to form an internal passage, which comprises:
- subjecting the part containing the sand core to heat at a temperature sufficient to pyrolyze the chemical bonding agent, in a fluidized bed of solid particles.
Dependencies are inferred from the claim text.