Film winding device, film production system as well as method for winding a film web

Abstract

A film winding device for winding a film web to a film bale is disclosed having a winding apparatus and a feed apparatus. The feed apparatus includes a feed slide, a contactor and at least one tensioner, the tensioner is attached to the feed slide and the tensioner is located before the contactor so that the tensioner can set a film tension of the film web. The tensioner includes a cylinder, and the cylinder comprises a micro-porous surface at least in the region of the arc.

1 . A film winding device for winding a film web to a film bale comprising a winding apparatus and a feed apparatus,
 wherein the winding apparatus comprises at least one winding core and is configured to wind a film bale on the winding core,   wherein the feed apparatus comprises a feed slide, a contactor and at least one tensioner,   wherein the contactor is attached to the feed slide and is located adjacent to the winding core in such a way that the contactor is able to guide the film web to the winding core or to the film bale on the winding core,   wherein the tensioner is attached to the feed slide and the tensioner is located before the contactor in the direction of travel of the film web in such a way that the tensioner is able to set a film tension of the film web,   wherein the tensioner comprises a cylinder with a circumferential surface, wherein the cylinder has an arc in the cross-section and the circumferential surface comprises at least a micro-porous surface in the region of the arc.   
     
     
         2 . The film winding device according to  claim 1 , wherein the arc corresponds to an angle of at least 90°, or at least 180°, or at least 200°. 
     
     
         3 . The film winding device according to  claim 1 , wherein the micro-porous surface comprises a plurality of openings that have a diameter smaller than 900 μm, or smaller than 500 μm. 
     
     
         4 . The film winding device according to  claim 1 , wherein the feed apparatus comprises at least one deflector that is attached to the feed slide and is located in the direction of travel of the film web before the tensioner or in the direction of travel of the film web between the tensioner and the contactor,
 wherein said at least one deflector comprises a cylinder with a circumferential surface, wherein the cylinder has an arc in the cross-section and the circumferential surface comprises at least a micro-porous surface in the region of the arc.   
     
     
         5 . The film winding device according to  claim 1 , wherein at least one of the cylinder of the tensioner or the deflector comprise a compressed-air connection, by means of which compressed air is introducible into the interior of the cylinder. 
     
     
         6 . The film winding device according to  claim 1 , wherein the thickness of the film web is smaller than 10 μm, or smaller than 5 μm. 
     
     
         7 . The film winding device according to  claim 1 , wherein contactor comprises a contact roller, or wherein the contactor comprises a contact roller and at least one adjustment mechanism comprising an adjustment rail and an adjustable slide, wherein the contact roller is attached moveably, or moveably linearly, to the feed slide by means of said at least one adjustment mechanism. 
     
     
         8 . The film winding device according to  claim 1 , wherein the tensioner comprises at least one adjustment mechanism comprising an adjustment rail and an adjustable slide, wherein the cylinder is attached moveably or moveably linearly, to the feed slide by means of said at least one adjustment mechanism. 
     
     
         9 . The film winding device according to  claim 7 , wherein at least one of the adjustment rail or the adjustable slide comprise air outlet openings in such a way that an air bearing can be provided for the adjustable slide. 
     
     
         10 . The film winding device according to  claim 7 , wherein said at least one adjustment mechanism comprises at least one adjustment actuator that is connected to the adjustable slide and is configured to move the adjustable slide linearly. 
     
     
         11 . The film winding device according to  claim 7 , wherein the feed apparatus comprises at least one feed rail for the feed slide. 
     
     
         12 . The film winding device according to  claim 11 , wherein at least one of the feed rail or the feed slide comprises air outlet openings in such a way that an air bearing can be provided for the feed slide. 
     
     
         13 . The film winding device according to  claim 1 , wherein said at the feed apparatus comprises at least one feed actuator that is connected to the feed slide and is configured to move the feed slide linearly. 
     
     
         14 . The film winding device according to  claim 1 , wherein the film winding device comprises a control device that is designed to control the feed apparatus in such a way that the contactor bears against the winding core or against the film bale on the winding core with a predefined contact pressure. 
     
     
         15 . The film winding device according to  claim 14 , wherein the contactor bears against the winding core or against the film bale on the winding core with a predefined contact pressure through control of at least one of the feed actuator or the adjustment actuator of the contactor. 
     
     
         16 . The film winding device according to  claim 1 , wherein the film winding device comprises a control device that is designed to control the feed apparatus in such a way that the tensioner applies a specific film tension on the film web. 
     
     
         17 . The film winding device according to  claim 16 , wherein the tensioner applies a specific film tension on the film web through control of the adjustment actuator of the tensioner. 
     
     
         18 . The film production system comprising at least one film stretching unit and one film winding device according to  claim 1 . 
     
     
         19 . A method for winding a film web or a film web made of battery separator film by means of a film production system comprising at least one film stretching unit and one film winding device, or by means of a film winding device,
 the film winding device comprising a winding apparatus and a feed apparatus, wherein the winding apparatus comprises at least one winding core and is configured to wind a film bale on the winding core, wherein the feed apparatus comprises a feed slide, a contactor and at least one tensioner, wherein the contactor is attached to the feed slide and is located adjacent to the winding core in such a way that the contactor is able to guide the film web to the winding core or to the film bale on the winding core, wherein the tensioner is attached to the feed slide and the tensioner is located before the contactor in the direction of travel of the film web in such a way that the tensioner is able to set a film tension of the film web, wherein the tensioner comprises a cylinder with a circumferential surface, wherein the cylinder has an arc in the cross-section and the circumferential surface comprises at least a micro-porous surface in the region of the arc.   
     
     
         20 . The method according to  claim 19 , wherein at least one of the contactor bears against the winding core or against the film bale on the winding core with a predefined contact pressure, or a specific film tension is applied to the film web by means of the tensioner.