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US 11,117,283 B2Granted
Machine for cutting to size rolls of predefined length from logs with a greater length
AssigneeOMT, Inc.
InventorMarcello Tommasi
Life of this patent
Estimating the term…
Abstract
Machine for cutting to size rolls with a defined length from logs having a greater length using a conveyor belts to drive the log to a cutting blade. Photocells are used to determine the length of the longs and to assist with the overall workings of the machine.
Claims24
Machine for cutting to size rolls (R) with a defined length (L2) from logs having a greater length (L1), comprising:
- a first conveyor belt (20) which can be driven so as to convey a log (1) advancing in a longitudinal direction (X-X);
- a programming and control device (500) for controlling and commanding operating drives and performing necessary synchronization for correct management of a machine cycle;
- a pair (30) of second conveyor belts having a bottom belt (31) and a top belt (32) which are parallel to each other and arranged downstream of the first belt (21) in the longitudinal direction (X-X);
- a cutting blade (2), downstream of the second conveyor belts (30), which can be rotationally driven and which is fixed in the longitudinal direction and movable in a vertical direction (Z-Z);
- a third conveyor belt (60) for conveying finished rolls (R) towards a machine outlet;
- a first photocell (81) connected to the programming and control device (500) and arranged upstream of the second conveyor belts (30) in the longitudinal direction (X-X), for detecting passage of a rear end (1b) of a log (1) being machined and sending a respective signal to the programming and control device (500);
- wherein the programming and control device (500) is configured to command feeding of a new log to be machined to the first conveyor belt (20), depending on said signal emitted by the first photocell (81);
- and
- wherein the programming and control device (500) is configured to control driving in a feeding direction of the first belt (20) at a first speed (V20) and of the second belts (31, 32) with respective speeds (V20, VI30), such as to cause contact of a front end (1a) of a new log (1) to be machined with the rear end (1b) of the log preceding it along the feeding direction through the machine.
6 more elements
Process for cutting to size rolls (R) with a defined length (L2) from logs having a greater length (L1), comprising the following steps:
- supplying a first log (1) to be machined to a first conveyor belt (20) for conveying logs along a longitudinal direction (X-X);
- conveying the first log (1) by said first conveyor belt (20) to a pair (30) of second conveyor belts having a bottom belt (31) and a top belt (32) which are parallel to each other and arranged downstream of the first conveyor belt (20) in the longitudinal direction (X-X);
- taking-up of the first log (1) by the second conveyor belts (30) and conveying thereof to a cutting blade (2) which can be rotationally driven and which is fixed in the longitudinal direction and movable in a vertical direction (Z-Z);
- cutting a leading trim (RT) of predefined length (L3) from the first log (1) by the cutting blade (2);
- controlled feeding of the first log (1) to the cutting blade (2) by the second conveyor belts (30), with sequential cutting of rolls (R) of predefined length (L2);
- detecting passage of a rear end (1b) of the first log (1) by a first photocell (81) arranged upstream of the second belts (30) in the longitudinal direction (X-X) and connected to a programming and control device (500) for controlling and commanding various operating drives and performing necessary synchronization for correct management of the process;
- sending a respective signal for detection of the passage of the rear end (1b) of the first log (1) by the first photocell (81) to the programming and control device (500);
- supplying a new log to be machined to the first conveyor belt (20), commanded by the programming and control device (500) based on said signal emitted by the first photocell (81);
- driving the first belt (20) at a first speed (V20) in a feeding direction and the second belts (31, 32) at respective speeds (V20, VI30) such as to cause contact of a front end (1a) of the new log (1) to be machined with the rear end (1b) of the first log preceding it along a longitudinal feeding path through the machine;
- conveying cut rolls (R) towards a machine outlet.
7 more elements
Dependencies are inferred from the claim text.