| 摘要 |
PURPOSE:To manufacture a powder molded article which offers greater saving of materials for special applications by packing the first powder in the first space between a die having a step part in a compression direction and a lower punch then packing the second powder in the second space which is so formed as to descend gradually and continuously in the compaction direction and molding these powders by compaction. CONSTITUTION:The first powder A is packed by the first feed shoe 6 into the first space 31 including the intrinsic space 30 in the die step part existing between a die 2 and a lower punch 3 and/or the space formed by the relative descending of the punch 3. Next, the second space 32 is so formed that the top surface A1 of the first powder in the position of the step part 21 of the die 2 and the top surface A2 of the first powder in the position of the punch 3 form the curved surfaces descending gradually and continuously in the compaction direction on relatively descending of the punch 3. Thence, the second powder B is packed by the second feed shoe 7 into this space 32, after which an upper punch 5 is lowered, whereby the powders are compacted and molded. |
