Patent ID: 6435259
Filing Date: 2002-08-20
Classification: B22C

Abstract:
In a method of casting a cylinder head, the steps comprisingproviding a frame core having at least one core supporting and positioning surface, providing a one piece coolant jacket core having at least one core supporting and positioning surface, positioning the one-piece coolant jacket core on the frame core by engaging the core supporting and positioning surface of said coolant jacket core with said frame core, providing a one-piece exhaust core having a plurality of exhaust passage-forming portions extending transversely therefrom and at least one core supporting and positioning surface, positioning the one-piece exhaust core on the assembled frame core and coolant jacket core by engaging its at least one core supporting and positioning surface with the assembled frame core and coolant jacket core, providing an intake core having a plurality of intake passage-forming portions and at least one core supporting and positioning surface, positioning the intake core on the assembled frame core, coolant jacket core, and exhaust core by engaging its at least one core supporting and positioning surface with the assembled frame core, coolant jacket core and exhaust core, drilling a plurality of holes through the assembled cores, adding a mixture of core sand and a curable resin therefor to the plurality of holes, and curing said resin to retain the assembled cores in an integral assembly.