Method and machine for cutting logs of wound web material
AssigneeFabio Perini S.p.A.
InventorsGraziano Mazzaccherini, Franco Montagnani
Life of this patent
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Abstract
The cutting machine for cutting logs of web material, includes a cutting head arranged along the feeding path of the logs. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes a store unit for disc-shaped cutting blades associated with the cutting head. A handling member is provided to remove a worn disc-shaped cutting blade from the cutting head and replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit.
Claims12
An arrangement comprising:
- a cutting machine for cutting logs of web material comprising:
- a feeding path for logs to be cut;
- a cutting head arranged along the feeding path, said cutting head comprising a coupling for a disc-shaped cutting blade, and said cutting head being configured to impart the disc-shaped cutting blade a rotary motion around an axis thereof and a cyclic movement to cut the logs into rolls, and to allow the logs to move forward along the feeding path;
- at least one store unit for disc-shaped cutting blades adapted to store a plurality of the disc-shaped cutting blades;
- at least one handling member, which is movable with respect to the cutting head, to remove the disc-shaped cutting blade from the cutting head when the disc-shaped cutting blade is a worn disc-shaped cutting blade to be replaced, and to replace the worn disc-shaped cutting blade with a new disc-shaped cutting blade taken from the store unit;
- wherein the store unit comprises a blade-holder adapted to house the plurality of disc-shaped cutting blades with respective disc-shaped cutting blade axes being aligned according to an alignment direction substantially parallel to the feeding path;
- wherein the blade-holder is adapted to move the disc-shaped cutting blades substantially parallel to the blade axes to selectively bring each disc-shaped cutting blade in a pick-up or load position with respect to the cutting head;
- and wherein the at least one handling member is adapted to position a worn disc-shaped cutting blade removed from the cutting head into an empty seat of the store unit, and is adapted to pick up a new disc-shaped cutting blade from the store unit and attach the new disc-shaped cutting blade to the cutting head.
A method for cutting logs of wound web material, comprising steps of:
- moving logs of web material sequentially along a feeding path in a direction parallel to axes of the logs;
- cutting the logs by a disc-shaped cutting blade mounted on a cutting head and severing the logs into rolls of an axial length smaller than that of the logs, the cutting head moving the disc-shaped cutting blade with a cyclical motion to cut the logs and allow a forward movement of the logs along the feeding path;
- periodically grinding the disc-shaped cutting blade;
- when the disc-shaped cutting blade is so worn that the cutting blade is a worn disc-shaped cutting blade to be replaced:
- temporarily stopping the forward movement of the logs;
- removing the worn disc-shaped cutting blade from the cutting head, taking a new disc-shaped cutting blade from a store unit, transferring the new disc-shaped cutting blade to the cutting head and mounting the new disc-shaped cutting blade on the cutting head;
- and
- once the new disc-shaped cutting blade has been mounted on the cutting head, re-starting the forward movement of the logs along the feeding path;
- wherein the store unit comprises a blade-holder arranged and configured to keep a plurality of disc-shaped cutting blades with respective cutting blade axes aligned according to an alignment direction substantially parallel to the feeding path;
- wherein the blade-holder is adapted to move the plurality of disc-shaped cutting blades in a direction substantially parallel to the blade axes and to the alignment direction;
- and
- wherein at least one handling member is adapted to position the worn disc-shaped cutting blade removed from the cutting head into the store unit, and is adapted to pick up the new disc-shaped cutting blade from the store unit and attach the new disc-shaped cutting blade to the cutting head.
Dependencies are inferred from the claim text.