| 摘要 |
<p>An injection-moulding unit comprises a mould (2) with a marking or numbering unit (3) for applying sequential markings to workpieces formed in the mould. The unit has at least two coaxial drawing wheels (5) which have markings over their circumference, and a switching unit for the wheels. The latter are located in the mould housing (4). The markings are sunk into the wheel surface. The wheels have a central opening, and the openings form a hollow chamber. The switching unit comprises a rotatable wheel with saw shaped teeth, which is located next to the drawing wheels, and which is actuated by a plunger (15). The actuating end of the plunger protrudes from the housing. The switching unit has a carrier for the wheels, and the carrier can move eccentrically about a swivel axis.</p> |
