Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1991-02-04
1992-09-29
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 66, B65H 1820, B65H 1926
Patent
active
051508486
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a re-reeling device for sheet materials, particularly paper, and the related cutting device.
To eliminate accidental defects or imperfections in reels of sheet material, for example paper, the practice is known of repeating the winding operation on machines analogous to reeling machines, but generally of smaller dimensions, called re-reeling machines.
At present, re-reeling machines are used in which the reel being wound has no support chucks.
Re-reeling machines of this type usually comprise an upper cylinder, with a peripheral speed equal to the feeding speed of the material, and a lower cylinder, spaced from the first in such a way that a winding core for the reel to be made up can be positioned between said two cylinders. During the winding phase, the second cylinder is operated with a peripheral speed equal to that of the first cylinder, while, in the reel replacement phase, the speed of said second cylinder is reduced to allow the expulsion operations of the made up reel and the introduction of a new core. This slowing down, and in some cases even stopping, of the cylinder, results in imperfection in the first winding layers of the reel to be made up, and relatively low production.
FR-A-2 544 701 describes a reeling machine in which three winding cylinders rotate at the same constant peripheral speed, which is the advancing speed of the sheet material. The structure of said machine is complex because of the presence of continuous belts wound in annular grooves formed in one of the cylinders, which advance at a lower speed than the peripheral speed of the cylinder, and which intervene when the core is to be inserted in the space between the cylinders, in order to exert a braking action on the core itself.
The aim of the invention is to realize a re-reeling machine which allows high production by guaranteeing perfect winding of the reel right from the first layers.
In the re-reeling machine according to the invention, the winding roller is preferably moved, by means of a leverage, by a control cam, whose profile defines the length of winding of the reel. The cam profile preferably has a substantially arc of circumference portion completed by a curved line, having a minimum zone and a maximum zone. When the member driven by the cam travels along the zone descending between the arc portion and the minimum zone, the winding roller supports the wound reel, aligning with it, and a new core is introduced between the conveyor roller and the transfer roller. When the driven member reaches the minimum zone, the winding roller is in a lower position, which allows the discharge of the made up reel, while the center of the new reel, already in the winding phase, is positioned along the axis of conjunction between the conveyor roller and the transfer roller.
When the driven member reaches the maximum zone, the winding roller is in an upper position, in which it receives the reel in the winding phase, while the reel already made up leaves the winding unit. Finally, during the arc of circumference path of the driven member, the winding of the reel is completed between the three winding, conveyor and transfer rollers.
In a different embodiment, the leverage can be controlled by means of a microprocessor.
The re-reeling machine according to the invention comprises insertion arms whose ends are provided with rollers or pins, and are arranged adjacent to the core which is to be introduced, until the latter reaches the axis of conjunction between the conveyor roller and the transfer roller.
An elastic means can be used, for example a spring, a pneumatic cylinder or a cam, in order to allow the transfer roller to move away from the conveyor roller, and thus from the reel being wound, so as to avoid the wound material being crushed.
The re-reeling machine according to the invention preferably comprises a cutting device, consisting of a rotating cylinder provided with a retractable blade suitable for engaging with a recess provided on the conveyor cylinder, the emerging of the said blade being
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Alberto Consani S.p.A.
Jillions John M.
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