摘要:
An apparatus for replacing printing sleeves which comprises a handling device (2) which can be removably engaged with a printing sleeve and a movement robot for moving the handling device (2); the handling device (2) comprises a supporting frame (7), which is connected to the movement robot and supports a supporting rod (8) which protrudes in a cantilevered manner from the supporting frame (7), and a self-centering grip clamp (10) which is able to translate on command, with respect to the supporting frame (7), along a movement direction that is substantially parallel to the axis of the supporting rod (8), between an advanced working position and a retracted working position; the grip clamp (10) has engagement means (11) which are movable on command between an inactive position, in which they are closer to the axis of the supporting rod (8), in order to allow their insertion into or extraction from the internal cavity (3a) of the printing sleeve, and an active position, in which they are radially spaced apart from the axis of the supporting rod (8), in order to allow their engagement with the internal surface of the printing sleeve.
摘要:
A printing machine which comprises advancement means for advancing material (2) to be printed which are provided at least with a traction drum (3) which can rotate about its own axis and is designed to receive, at an entry region (4), the material (2) to be printed and to convey it toward an exit region (5) for the exit of the material (2) from the traction drum (3), said exit region being spaced circumferentially apart, along the direction of rotation of the traction drum (3) about its own axis, from the entry region (4). Analog print stations (6) are arranged around the traction drum (3), between the entry region (4) and the exit region (5). The printing machine further comprises, between at least two analog print stations (6), conveyance means (7) for conveying the material (2) to be printed which arrives from the traction drum (3) along an advancement path that has at least one advancement portion (8) for advancing the material (2) to be printed which extends substantially straight, along which at least one digital print station (9) is arranged.
摘要:
An inking device for printing machines that comprises an inking body (2) which is designed to be arranged so as to face the lateral surface of an anilox roller (3) and forms an inking chamber (7) that is open toward the anilox roller (3) and has at least one inlet (8) for introducing the ink into the inking chamber (7) and at least one outlet (9) for the exit of the ink from the inking chamber (7). The particularity of the invention consists in the fact that it comprises control means (13) that are adapted to vary the passage opening (9a) of the or of each outlet (9) as a function of the pressure of the ink in the inking chamber (7).
摘要:
A system for adjusting and monitoring the pressures of the printing rollers of a flexographic printing machine, which comprises at least one reader (7) which is adapted to be placed at the printing rollers (3, 4) of the printing machine. The reader (7) is adapted to detect the contrast of the print on the printing material (8) wrapped around the central drum (2) of the printing machine and is connected to a processing unit (10) which is adapted to determine and control, as a function of the contrast detected by the reader (7), the position of the printing rollers (3, 4) with respect to the central drum (2) in order to achieve the desired print.