| 摘要 |
DEVICE FOR FORMING BALLS OF PLASTIC MATERIAL Device for forming plastic balls from a bar of plastic material. The bar is separated into balls one by one by a pair of circular cutters, each cutter being formed on its peripheral side surface with a cutting member consisting of a plural number of spiral arcuate blades which are arranged within equi-angular ranges, respectively, extending along the peripheral side surface of the cutter. |
