| 摘要 |
PURPOSE:To obtain simultaneously plural pieces of molding each having a uniform weight by powder molding by providing a stage for rising lower punches to the prescribed extent while a feeder part exists still above the cavities after supplying the powder into the cavities. CONSTITUTION:The lower punches 7a-7c are preliminarily lowered down to D' slightly larger than the prescribed lowering depth D in the lower part in the cavities 6a-6c of a base 5 (figure A). The feeder part 3 is moved above the cavities 6a-6c and the glass powder 9 is supplied into the cavities (figure B). While the feeder part 3 exists above the cavities 6a-6c. lower punches 7a-7c are risen by D-D' to set the depth size of the cavities 6a-6c at D, by which the weight of the powder 9 to be packed into the cavities 6a-6c is made uniform (Figure C). The feeder part 3 is then moved away (figure D) and in succession, the upper punches 8a-8c are lowered to press the powder 9 in the cavities 6a-6c and thereafter the lower punches 7a-7c are risen by the size D to position glass tablets 9a-9c on the base 5. |
