Method for removal of material residues from rolls with a material carrying core

A method for removal of material residues, from a roll having a material-carrying core having dimensions including a diameter of approximately 300 mm and a length of approximately 2540 mm to thereby allow re-use of the core in a same way as new and unused cores a number of times for winding the material residues, the method comprising:

• providing:
• a beam;
• a leg connected to one end of the beam;
• a vertical arm that extends from the beam towards the roll, the vertical arm being moveable to and from the leg;
• and
• a driven chuck disposed at an end of the vertical arm that fits into the core for rotating the roll;
• making a cut section in an envelope surface of the roll having the material-carrying core from one end or end portion of the roll to an other end or end portion of the roll by the driven rotary knife;
• performing a first rotation of the roll, via the driven chuck, with the cut section in one direction so that the material residues intersected by the cut section release from the material residues remaining on the roll into a position hanging vertically downward;
• after the material residues release, performing a second rotation of the roll, via the driven chuck, in an opposite direction to the one direction so that a rest of the material residues intersected by the cut section releases from the material remaining on the roll;
• and
• if required, repeating the first rotation and the second rotation until a desired amount of the material residues has been removed,
• wherein the driven rotary knife is connected to a motor for reciprocating of the knife, and
• wherein the roll with the cut section is rotated at least 90° in the one direction, until the cut section is tangent to or ends up on the underside of the roll, and, after the material residues release, the roll with the cut section is rotated at least 180° or more in the opposite direction for releasing the rest of the material residues intersected by the cut section, so that the same falls down under the roll having the material-carrying core.