Method and machine for assembling rigid tubular bodies made from a cardboard material with a sealing structure

A machine for manufacturing packages comprising a tubular body made from a cardboard material and a sealing structure made from a cardboard material, assembled to the tubular body, said machine comprising:

• a sealing unit comprising a rotating sealing plate, said sealing plate comprising a number N of sealing stations, with 3≤N≤50, each sealing station comprising two sealing tools, said sealing plate rotating following a rhythm via an indexer with N stops, wherein all sealing stations are located on the same plane,
• a feed device inserting tubular bodies into a first sealing station two by two,
• an insertion device bringing sealing structures in the form of flat portions, two by two, to a pair of forming tools of the second sealing station upstream from the first sealing station,
• a device for transferring tubular bodies, sealed to sealing structures, from the sealing plate to a unit arranged downstream, and
• a device for transferring sealing structures from a cutting station towards a sealing station, said device comprising means for adjusting a precutting pitch (Pd) between two sealing structures of a unit for making sealing structures to a pitch of the forming tools (Po) of the sealing station of the sealing unit, comprising a longitudinal linear actuator configured to perform a rectilinear movement and two transfer slides configured to perform a transverse movement to produce a transfer angle.