Evaporable foam pattern for use in casting a cylinder head

Details Evaporable foam pattern for use in casting a cylinder head Evaporable foam pattern for use in casting a cylinder head

B - Operations, Transporting

22

C

22/144

B22C 7/02 (2006.01) B22C 9/04 (2006.01)

Patent

CA 1333842

An evaporable foam pattern for producing a cast metal head for a multiple cylinder engine. The assembled pattern includes an elongated block of evaporable foam material having opposed inner and outer faces. A plurality of generally circular head recesses are formed in the inner face and define the cylinder heads in the metal casting. The block is also formed with an internal passage including a group of annular chambers that surround the head recesses and channels interconnect adjacent chambers. The block also has an inlet which communicates with one end of the internal passage and an outlet that communicates with the opposite end of the passage. The pattern is composed of a pair of longitudinal pattern sections having abutted edges that are joined together by an adhesive. The heads, as well as the inlet and outlet, are located in one of the pattern sections, while the two sections in combination define the internal passage.

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