| 摘要 |
A carton feeder for a continuous motion packaging machine utilizes a speed compensation mechanism implemented through a rotating valve assembly and actuation system. The rotating valve assembly provides a vacuum and compression to vacuum cups, for facilitating the transfer and release, respectively, of cartons within the carton feeder. The valve assembly includes a base plate and a rotating port plate. A circumferential position adjustment of the base plate advances or retards timing of the vacuum/compression to the vacuum cups within the carton feeder. A pneumatic cylinder assembly adjusts the circumferential position of the base plate. A speed sensor senses machine speed and sends a machine speed signal to a controller. The controller signals a solenoid responsive to machine speed to extend or retract the pneumatic cylinder assembly, thereby circumferentially adjusting the valve base to advance or retard vacuum timing.
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