| 摘要 |
An article having side holes 11, e.g. a spacer 10 for a central heating radiator, is made of compacted particulate material in a die comprising a plate 1 having a vertical cavity 2, a top punch 7 and a bottom punch 4. An inner core rod 3 forms a central passageway in the spacer 10 and side core rods 6 form the side holes 11. The density of the compacted material defining the side holes 11 is higher than in the remainder of the article. <IMAGE> |
