Cutting device for web winder

Abstract

A device which can be incorporated into a web winding machine (1) for separating webs. The cutting section (106) of the separating section (100) extends across the width of the fiber web and is positionally fixed or vibratingly driven with respect to the axis of rotation of the contact roll (8) around which holding sections (130, 140) are rotatably arranged. The handling segments (102, 104, 105) seat the cutting segments in the holding segments, whereby the cutting segments do not come into contact with the fiber web. The cutting segment is moved transversely to the axis of rotation of the device in such a way that the cutting segment presses the fiber web for separation. A sensor system (160) is used to detect at least one state of the separation section. The fiber web winder winds the fiber web on the winding shaft by means of contact rollers and pressing elements. The pressing element presses the winding shaft against the contact roller so that the fiber web is wound on the winding shaft guided around a part of the circumference of the contact roller. The winder separates the web with the device and monitors 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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