| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooler in which formation of a core-supporting ruggedness on a primary surface is prevented even when the cooler has a planar shape. Ž<P>SOLUTION: In the cooler 1, a hollow planar body 2 having a heat exchange conduit 2a inside, and an inflow conduit 3, an outflow conduit and an auxiliary conduit 5 which are formed on the side of the body to communicate the heat exchange conduit with the outside are integrally molded by casting. A sand mold core 13 is formed, the core is housed in a cavity so that a gap D is formed between the core 13 and the inner face of the cavity of metallic dies 11, 12, and a molding material M is poured in the gap. The body, the inflow conduit, the outflow conduit and the auxiliary conduit are integrally molded and removed from the metallic dies, and the core is crushed and discharged outside, thus manufacturing the cooler. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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