Patent ID: 7032560

Claim:
A partition plate, for an intake port of a cylinder head to be manufactured by cast molding, which is preliminarily set prior to the cast molding in a sand core applied to form the intake port and then cast in when the cast molding is conducted so as to partition the intake port into a plurality of ports, comprising: an intake-side distal end; a cylinder-side distal end; a pair of side edges continuous with the intake-side distal end and the cylinder-side distal end and to be cast in by molten metal when cast molding is conducted, each of the pair of side edges having end faces facing in a thickness direction and a side end face continuous with the end faces; and a promoter section including at least one of a plurality of projections, a plurality of indentations, and a plurality of through-bores, wherein the plurality of projections, the plurality of indentations, and the plurality of through-bores are provided on at least one of the side end face and the end faces of each of the pair of side edges to promote solidification of the molten metal.