Winding – tensioning – or guiding – Tension control or brake – Take-up coil drive control
Patent
1999-01-04
2000-12-12
Jillions, John M.
Winding, tensioning, or guiding
Tension control or brake
Take-up coil drive control
2424139, 2424199, B65H 23198, B65H 2310
Patent
active
061586870
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a winding apparatus for paper, textile, plastic or other material webs and to a method of winding such webs.
It is known to wind paper, textile, plastic or other material webs onto a reel, and then to feed them, by unwinding the reel, to a further processing process, such as a printing, cutting or packing apparatus.
A central function during the winding of a reel is the production of a tensile force on the web. The winding quality and, associated with this, the unwinding characteristics of the reel are strongly influenced by the web tension that is present during the winding operation.
The object of the present invention is to propose a winding apparatus for paper, textile, plastic or other material webs which has more advantageous winding characteristics, and/or allows a tension acting on the web to be produced more advantageously.
The object is in particular achieved with a winding apparatus, for a paper, textile, plastic or other material web, which comprises a reel drive apparatus for driving a reel, in order to convey the web in a feed direction and to wind it onto the reel, and a web tension roll, which is arranged upstream of the reel in the feed direction, in order to produce a tension which acts on the web counter to the feed direction, the web tension roll being coupled to a drive apparatus, the drive apparatus comprising a self-locking mechanism and a drive, and the self-locking mechanism being operatively arranged between the drive and the web tension roll.
The operative arrangement of the self-locking mechanism between the web tension roll and the drive has the advantage that, by means of an appropriately controlled speed of the drive of the web tension roll, braking energy can be extracted via the self-locking mechanism, it being possible for the extracted braking energy to be dissipated via the housing of the self-locking mechanism.
In an advantageous embodiment, the drive apparatus has a clutch that is operatively arranged between the web tension roll and the drive.
The object is in particular further achieved with a winding apparatus, for a paper, textile, plastic or other material web, which comprises a reel drive apparatus for driving a reel, in order to convey the web in a feed direction and to wind it onto the reel, and a web tension roll, which is arranged upstream of the reel in the feed direction, in order to produce a tension which acts on the web counter to the feed direction, the web tension roll being coupled to a drive apparatus and the drive apparatus comprising a clutch and a drive, so that the clutch is operatively arranged between the drive and the web tension roll, and the clutch permits slip between the drive and the web tension roll.
Neither friction nor slip must occur between the web tension roll and the conveyed web, in order not to damage the web, which consists of paper, for example, or the imprint on the web.
One advantage of the inventive winding apparatus is to be seen in the fact that a tensile force can be produced on the paper web even when the latter is at a standstill. The drive apparatus applies a torque to the web tension roll which acts counter to the conveying direction, the clutch that is arranged between the drive and the web tension roll being operated with slip and, at the same time, the speed of the drive and/or the slip of the clutch being controlled in such a way that the web tension roll remains stationary.
In a preferred embodiment, the drive acting on the web tension roll is configured as a controllable, variable-speed motor. In a further preferred embodiment, the clutch has means which can be controlled, for example magnetically or pneumatically, in order to control the maximum transmissible torque, so that the slip can be controlled with the aid of a control device.
In a particularly advantageous embodiment, the self-locking mechanism is arranged between the drive and the clutch. One advantage of this embodiment is to be seen in the fact that the self-locking mechanism is used, inter alia, to dissipate the braking ene
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Hunkeler AG
Jillions John M.
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