| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ceramic core for precision casting, withstanding a strength load received in each process of casting and excelling in an elution property of the ceramic core after casting at the same time. <P>SOLUTION: A sintered body structured to have high density at the outermost surface part of the ceramic core and to incline to low density toward the inside is used as the ceramic core. The outermost surface part is made high in density to have an effect of securing strength, and since the inside maintains a porous property, the elution property is excellent. The use of this ceramic core enables an improvement in the yield of a cast product. <P>COPYRIGHT: (C)2013,JPO&INPIT |
