| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a metal mold capable of making a tree-shaped wax model having a large number of product portions. <P>SOLUTION: The metal mold has an upper mold, a lower mold and a middle mold. The middle mold moves back and forth as the upper mold is opened or closed relative to the lower mold. The middle mold is sandwiched between the upper and lower molds when the upper mold is closed to contact with the lower mold. In this state, a trunk-shaped portion is formed and a runner part cavity and a product part cavity are formed in upper and lower stages within the mold. <P>COPYRIGHT: (C)2004,JPO |
