Paper mill rewinder with continuous reel change device

A paper mill rewinder for forming reels of paper strip material around a winding rod, ends of the winding rod being provided with two spindles, said rewinder comprising:

• a supporting frame;
• a feed system for the winding rod;
• a main forming cradle for a reel around said winding rod, the main forming cradle comprising a first winding roller and a second winding roller;
• an unloading system configured to unload a reel of the plurality of reels when the reel is formed;
• a controller;
• a secondary pre-forming cradle for said reel, the secondary pre-forming cradle comprising a third winder roller and a lateral support system configured to support said reel;
• and
• a transfer system configured to transfer said reel from said secondary pre-forming cradle to said main forming cradle without interruption to winding of the strip onto said rod, said transfer system comprising:
• a pair of supporting and moving arms for said reel, the pair of supporting and moving arms is configured to provide said lateral support for said secondary cradle in order to support said reel during a pre-forming phase by keeping the reel always in contact with said third winding roller and then to transfer said reel into said main cradle, and
• a second motor configured to impart an oscillating movement to said pair of supporting and moving arms.

A paper mill rewinder for forming reels of paper strip material around a winding rod, ends of the winding rod being provided with two spindles, said rewinder comprising:

• a supporting frame;
• a feed system for the winding rod;
• a main forming cradle for a reel around said winding rod, the main forming cradle comprising a first winding roller and a second winding roller;
• an unloading system configured to unload a reel of the plurality of reels when the reel is formed;
• a controller;
• a secondary pre-forming cradle for said reel, the secondary pre-forming cradle comprising a third winder roller and a lateral support system configured to support said reel;
• a transfer system configured to transfer said reel from said secondary pre-forming cradle to said main forming cradle without interruption to winding of the strip onto said rod;
• and
• an index oscillating around an axis, the index being provided at one end with a ply-forming roller configured to interact with said strip under control of the controller to form a loop and facilitate its winding around said winding rod when placed in said secondary pre-forming cradle.

A paper mill rewinder for forming reels of paper strip material around a winding rod, ends of the winding rod being provided with two spindles, said rewinder comprising:

• a supporting frame;
• a feed system for the winding rod;
• a main forming cradle for a reel around said winding rod, the main forming cradle comprising a first winding roller and a second winding roller;
• an unloading system configured to unload a reel of the plurality of reels when the reel is formed;
• a controller;
• a secondary pre-forming cradle for said reel, the secondary pre-forming cradle comprising a third winder roller and a lateral support system configured to support said reel;
• and
• a transfer system configured to transfer said reel from said secondary pre-forming cradle to said main forming cradle without interruption to winding of the strip onto said rod,
• wherein said feed system comprises:
• a pair of jaws configured to grip said spindles of said winding rod, and
• a vertical downward conveyor for said jaws, the vertical downward conveyor being configured to cooperate with said transfer system in the proximity of said secondary pre-forming cradle.