Capping unit for automatically assembling pump-operated spray cap bottles

摘要

A capping unit (1) wherein a number of capping heads (63), movable with a supporting carrousel conveyor (10) about a first axis (11), are each rotated about a respective second axis (47a) by a respective first shaft (61) movable axially on the carrousel conveyor (10), for moving the respective head (63) to and from a respective container (3) movable with the carrousel conveyor (10) and coaxial with the second axis (47a). Each head (63) provides for closing the respective container (3) with a cap (5) presenting an internally threaded ring nut (6) mounted for rotation on a pump-operated nozzle (9), and presents a first and second gripping device (83, 84) for respectively gripping the nozzle (9) and the ring nut (6) and controlled by a second shaft (64) movable axially in relation to the first shaft (61). The first gripping device (83) is angularly fixed in relation to the carrousel conveyor (10), whereas the second gripping device (84) rotates with the capping head (63) about the second axis (47a).