| 摘要 |
<p>An automatic positioning group in a machine for winding plastic film onto bobbins in order to determine the correct position of an operative oscillating element (40, 60) with respect to a core (43), i.e. a bobbin (42) of film (41) with a variation in the diameter size of the core or bobbin, wherein the operative oscillating element (40, 60) is supported at first free ends of levers (45) hinged on pins (46) associated with a frame (47) of the winding machine and oscillated by means of a relative actuator, in the group, the levers (45) extend, in an opposite position with respect to the end carrying the operative oscillating element (40, 60), in appendices (48) which collaborate with at least one pair of abutments (49, 49') positioned on a respective cam (50) rotating with respect to the frame (47) by means of an actuator (52), wherein each of the abutments (49, 49') is positioned on the cam with a different radial dimension with respect to a rotation axis (51) of the rotating cam (50). The operative oscillating element can consist of a contact roll (40) or a cutting blade (60).</p> |
