Lateral sealing device of packaging machine

摘要

In a lateral sealing mechanism, a cylindrical film is sandwiched and ultrasonic sealing is performed along a direction that intersects a conveying direction while a first horn and a first anvil, and a second horn and a second anvil rotate. The first horn is mounted on a first rotating body in a state of being coupled to a plurality of vibrating elements. The second horn is mounted on the second rotating body in a state coupled to a plurality of vibrating elements. A securing member grips a horn unit, which includes the horns and the plurality of vibrating elements, on the forward and rearward sides in the direction of rotation of the horn assembly in the vicinity of the node of ultrasonic vibration and secures the horn unit to the first rotating body and the second rotating body, respectively.

主权项

1. A lateral sealing device comprising:
a packaging machine configured to move a packaging material in a conveying direction and form a package from the packaging material; a pair of rotating bodies that rotate about corresponding rotation shafts, the pair of rotating bodies being configured to sandwich and laterally seal the packaging material along the directions intersecting the conveying direction of the packaging material, each of the rotating bodies including a horn assembly and an anvil, the horn assembly including a horn, a resonator and a plurality of vibrating elements, each rotating body having a forward side and a reverse side relative to a direction of rotation about the corresponding rotation shafts; and a securing member gripping the horn assembly at the forward side and the reverse side thereof, and securing the horn assembly to the rotating bodies, the securing member also directly retaining a portion of the resonator at a location adjacent to at least one of the vibrating elements in a lateral sealing direction, with the portion of the resonator being secured to the securing member at a node of the ultrasonic vibration produced by the horn assembly, the node being located along a major axis of the portion of the resonator.