| 摘要 |
A device for forming balls of plastic material, in which a filler is encased in a covering material, from a bar of plastic material consisting of an outer sleeve of covering material surrounding a central core of filler material. The bar is separated into successive balls 23 by a pair of circular cutters 4, each cutter being formed with cutting means comprising a plurality of spiral arcuate blades 5 extending along a peripheral side surface of the cutter and arranged within equi-angular ranges. |
