Rewinding machine and method for the production of rolls of web material

摘要

A rewinding machine is described with a winding cradle defined by three rollers and including a fourth winding roller, defining with the first winding roller a cradle in which the web material is pushed by a winding core to the beginning of each winding cycle, to cause severing of the web material without the need for controlled mechanical parts.

主权项

1. A method for winding a web material around a winding core and producing a roll of web material comprising:
providing a first winding roller and a second winding roller forming a winding nip through which winding cores and web material pass; winding a predetermined quantity of said web material around a first winding core to form a first roll; after winding said first roll, severing the web material and starting to wind a second roll around a second winding core, wherein the web material is severed by lengthening a path of said web material between said first winding roller and a further roller, arranged upstream of said first winding roller with respect to a direction of advancement of said web material, around which said web material is guided; wherein the path of the web material is lengthened between said first winding roller and said further roller by pushing the web material into a cradle between said first winding roller and said further roller; and wherein the path of the web material is lengthened between said first winding roller and said further roller by said second winding core pushing the web material into the cradle between said first winding roller and said further roller.