| 摘要 |
PURPOSE: A semi-solid mold is provided to achieve the uniformity of a structure by preventing the generation of an air bubble for forming a product using a thixoforming method. CONSTITUTION: The semi-solid mold(1) for forming a product in a specific shape by charging a semi-melted metal at a high pressure consists of an upper die(4) and a lower die(5), and a cavity(2) defined between the upper die and the lower die. The cavity is communicated with an L-shaped gate(6) for charging a semi-melted billet(3) at a high pressure. A dispersion guider(7) and a rounded portion are formed on the inner end of the gate. A slider(9) operated by a cylinder is installed on the tip end of the gate. The slider has an oil heater hole(12) connected to an oil heater for heating the semi-solid mold. By using the semi-solid mold, parts made of metal complex materials in various shape is fabricated using only one process. Also, by using the semi-solid billet having viscosity greater than liquid, the generation of an air bubble is prevented, and the damage caused by shrinkage is reduced.
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