Method and machine for cutting logs of wound web material

Patent metadata

Field	Value
Publication number	US-10899034-B2
Application number	US-201515507089-A
Country	US
Kind code	B2
Filing date	Jul 30, 2015
Priority date	Aug 29, 2014
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

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.

First claim

The invention claimed is:

1. 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 which is 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 associated with the cutting head; at least one handling member 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 rotating around a rotation axis substantially orthogonal to the feeding path for the logs and provided with a plurality of seats for the disc-shaped cutting blades, and wherein the plurality of seats are adapted to support the disc-shaped cutting blades in the blade-holder with their axis substantially orthogonal to the feeding path and the at least one handling member is adapted to pivot the disc-shaped cutting blades into a position with the rotation axis parallel to the feeding path and attach the new disc-shaped cutting blade to the cutting head.

2. The cutting machine according to claim 1 , wherein the plurality of seats for the disc-shaped cutting blades are arranged and configured to keep the disc-shaped cutting blades coaxial with one another.

3. The cutting machine according to claim 2 , wherein the plurality of seats are arranged and configured to keep the disc-shaped cutting blades with the rotation axis thereof substantially parallel to the feeding path and/or parallel to the axis of the disc-shaped cutting blade when the latter is mounted onto the cutting head, the blade-holder being provided with a translation movement substantially parallel to an alignment direction of the disc-shaped cutting blades held in the store unit.

4. 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 which is 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 associated with the cutting head; at least one handling member 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 rotating around a rotation axis substantially orthogonal to the feeding path for the logs and provided with a plurality of seats for the disc-shaped cutting blades, and wherein each seat of said plurality of seats is provided with a pivoting motion from a first position, wherein a respective disc-shaped cutting blade is stored, to a second position, wherein the respective disc-shaped cutting blade is transferred; in the first position the disc-shaped cutting blade is arranged with the rotation axis thereof substantially orthogonal to the feeding path for the logs; in the second position the disc-shaped cutting blade being arranged with an axis thereof being substantially parallel to the feeding path.

5. The cutting machine according to claim 4 , wherein the store unit comprises a single actuator to control the pivoting motion of all the plurality of seats with which the store unit is provided.

6. A method for cutting logs of wound web material comprising steps of:
providing a feeding path for logs to be cut;
arranging along the feeding path a cutting head with at least one disc-shaped cutting blade, the cutting head moving the disc-shaped cutting blade with a cyclical motion to cut the logs and allow a forward movement of the rolls along the feeding path;
providing at least one store unit for disc-shaped cutting blades associated with the cutting head;
moving logs of web material sequentially along the feeding path in a direction parallel to a log axis;
cutting the logs by the disc-shaped cutting blade mounted on the cutting head and severing the logs into small rolls having an axial length smaller than the logs;
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 forward movement of the logs; removing the worn disc-shaped cutting blade from the cutting head; taking a new disc-shaped cutting blade from the store unit by a handling member, transferring the new disc-shaped cutting blade to the cutting head and mounting the new disc-shaped cutting blade on the cutting head;
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 is adapted to support the disc-shaped cutting blades with axes of the cutting blades being substantially orthogonal to the feeding path, and the handling member is adapted to attach the new disc-shaped cutting blade to the cutting head; and wherein the store unit includes a blade-holder having a plurality of seats and each seat of said plurality of seats is provided with a pivoting motion from a first position, wherein a respective disc-shaped cutting blade is stored, to a second position, wherein the respective disc-shaped cutting blade is transferred; in the first position the disc-shaped cutting blade is arranged with the rotation axis thereof substantially orthogonal to the feeding path for the logs; in the second position the disc-shaped cutting blade being arranged with an axis thereof being substantially parallel to the feeding path.

7. 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 into 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;
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 is adapted to support the disc-shaped cutting blades with axes of the disc-shaped cutting blades being substantially orthogonal to the feeding path, and a handling member is adapted to attach the new disc-shaped cutting blade to the cutting head; and wherein the store unit includes a blade-holder having a plurality of seats and each seat of said plurality of seats is provided with a pivoting motion from a first position, wherein a respective disc-shaped cutting blade is stored, to a second po

Assignees

• Perini Fabio Spa

Inventors

• Mazzaccherini Graziano
• Montagnani Franco

Classifications

• B26D7/2621 Primary

  for circular cutters · CPC title

• B26D7/12

  by sharpening the cutting member · CPC title

• B26D5/22

  having the cutting member and work feed mechanically connected · CPC title

• B26D3/16

  Cutting rods or tubes transversely {(cutting tubes longitudinally B26D3/001)} · CPC title

• B26D1/157

  rotating about a movable axis (B26D1/20 - B26D1/24 take precedence) · CPC title