| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make a filter attain its maximum cleaning capacity and prevent the filter from being damaged. <P>SOLUTION: The filter 22 composed of metal meshes is loaded beforehand in the low-speed advance range 1 of a plunger tip 14 inside an injection sleeve 11. Molten metal M poured from a ladle 13 into the injection sleeve 12 through a molten metal supply port 11 flows toward a mold 16 through the filter 22. During the flow the filter 22 catches foreign substances mixed in the molten metal M such as oxides. As the filter 22 moves according to the advance of the plunger tip 14, the pressure of the molten metal M does not have a great influence on the filter 22 so that the filter 22 is prevented from being damaged. Further, the filter 22 is finally stowed into a biscuit forming section 21 of the mold 16 and can be separated together with biscuit castings from the mold 16 whereby the filter 22 does not obstruct the next casting cycle. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
