| 摘要 |
PROBLEM TO BE SOLVED: To produce an aluminum die cast product at a low cost, which can widely realize partial variation of characteristics and which has excellent adhesive strength between the portions is excellent. SOLUTION: The principal component of first molten metal and second molten metal are aluminum. This production method includes: a first process of applying the pressure to the first molten metal while pouring the first molten metal into a small cavity C1; a second process of applying the pressure to the second molten metal having silicon content different the first molten metal, while poring the the second molten metal into a large cavity which is made by enlarging the small cavity C1 at the point of time when the fluidity of the first molten metal becomes low in the small cavity C1; and a third process of obtaining the aluminum product by solidifying the first molten metal and the second molten metal in the large cavity. In the first process, the pressure is applied to the first molten metal while pouring the first molten metal and at the second process, the pressure is applied to the second molten metal while pouring the second molten metal, with the same injection 20. COPYRIGHT: (C)2005,JPO&NCIPI
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