CUTTING DEVICE FOR web winder

Abstract

The invention discloses a device that can be combined into a web winder (1) to separate a web. A cutting section (106) of a separating section (100) extends over the width of the web and is fixedly orvibratingly driven relative to the axis of rotation of a contact roller (8), and a holding section (130, 140) is rotatably arranged about the axis of rotation. An operating section (102, 104, 105) places the cutting section in the retaining section, whereby the cutting section is not in contact with the web. The cutting section is moved across the axis of rotation of the device such that the cutting segment squeezes the web for separation. A sensor system (160) is used to detect at least one state of the separation section. The web winder winds the web onto the winding shaft by means of a contact roll and a pressing element. The pressing element presses the winding shaft against the contact roller so that the web is wound on the winding shaft around the circumference of the contact roller. The winder uses the device to separate the web and monitor the position of the cutting section. The invention also relates to a method for operating a winder.

Description

technical field [0001] The invention relates to a device for a web winding machine which is capable of separating the web when changing the winding shaft to be wound. The invention also relates to a web winding machine equipped with such a device and to a method for such a web winding machine. Background technique [0002] Fiber web winders are known per se. They are used for winding fiber webs, eg from cards, onto winding shafts. For this purpose, the empty winding shafts are wound one after the other in an automatic exchange. This is accomplished by directing the incoming web material around rotating contact rolls. An empty winding shaft provided with an adhesive surface and rotating in the opposite direction to the touch roll rests against the touch roll and receives the fiber web from the touch roll due to adhesion. If this winding shaft is full, a new, empty winding shaft is pressed against the contact roller. In this case, the fiber web still wound up on the prece...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is difficult to obtain the position of the cutter sensor

Furthermore, the known electrodynamic displacement sensors have the disadvantage that the required electrical lines can only be routed very expensively from the outside to the individual displacement sensors

The non-contact transmission sensor can only use the battery solution, and the operability is deteriorated due to the need to replace the battery or storage battery

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