| 摘要 |
In a machine for making bottles or similar containers, from vitreous or plastic material in which a plurality plungers or of rams and tongs cooperating with molds are connected to a turntable for movement with the latter about the axis thereof, a drive for moving the ram parallel to the turntable axis toward and away from the respective mold and the tongs between open and closed positions for holding neck molds and the other mold parts coaxially aligned. The drive for the rams comprises a first cam track arranged stationarily about the axis of the turntable and a roller follower for each ram to move the latter toward and away from the respective mold during movement of the followers along the first cam track and the drive for the tongs comprises a second cam track also arranged stationarily about the turntable axis and a roller follower for each tongs to move the latter between open and closed positions during movement of the roller followers of the tongs along the second cam track. In order to relieve the cam tracks and the followers from excessive strains, to reduce wear of these elements and to make the connection between the follower and the movable elements operated by the same as light as possible to reduce mass forces during fast operation of the machine, a servomotor is arranged between each of the followers and the element moved thereby. Each servomotor is controlled so that the main forces for moving these elements are provided by the respective servomotors. |
