Windmöller & Hölscher KG

The invention describes an electrode for applying an electrical potential to a surface of a conductive or non-conductive material, in particular a plastic material, which electrical potential, in particular, causes electrical polarization, comprising a first electrically conductive material, in particular a metal wire, which first electrically conductive material extends at least partially parallel to the surface, comprising a second electrically conductive material extending at least partially parallel to the surface, at least one electrical connection connecting the first electrically conductive material to the second electrically conductive material, the first electrically conductive material having a greater conductivity than the second electrically conductive material.

The invention relates to a cooling device for plastic tubular films. In order to increase the cooling capacity of a known cooling device while simultaneously reducing bubble instabilities, the operating distance between the support air unit and the film bubble can be adjusted using at least two driven lifting elements, wherein the lifting elements are coupled together via a coupling element such that the lifting elements produce the same displacement distance upon adjusting the operating distance.

The invention relates to a device ( 100 ) for unwinding a material web from a plurality of material web rolls ( 110 ), said device comprising: a machine frame ( 102 ); a main bearing point ( 105 ), which is located on and in particular fastened to the machine frame, for rotatably supporting a first shaft ( 109 ) for a first material web roll ( 110 ), wherein the material web roll can be unwound; a first drive shaft ( 121 ) for rotationally driving the first material web roll, wherein the first drive shaft can be placed directly or indirectly against the outer periphery of the first material web roll in order to transmit the drive force; a first pair of pivot arms, the pivot arms (122) of which are pivotably mounted in the machine frame, wherein one end of the first drive shaft is rotatably mounted in each pivot arm; a secondary bearing point which is located on the machine frame and which can take over the shaft from the main bearing point and/or is provided for supporting a second shaft for a second material web roll.

The invention relates to a method ( 100 ) for supporting the implementation of a process change from a manufacturing process ( 200 ) for manufacturing a first film material ( 201 ) to a subsequent process ( 210 ) for manufacturing a second film material ( 211 ) in an extrusion device ( 10 ). Furthermore, the invention relates to a computer program product and a system ( 1 ).

The invention relates to a method ( 100 ) for supporting at least one process change from a manufacturing process ( 200 ) for manufacturing a first film material ( 201 ) to a subsequent process ( 210 ) for manufacturing a second film material ( 211 ) in an extrusion device ( 10 ). The invention also relates to a computer program product and a system ( 1 ).

The invention describes a method for producing a plastics film by a film-extruding machine, wherein at least two plastics materials from at least two reservoirs are fed together to one extruder or are each fed to a respective extruder, the plastics materials are melted in the extruder or in the extruders and are conveyed as a melt strand or as melt strands into a die head, the melt Strand or the melt strands are spread out flat in the die head and is/are extruded from a die of the die head as a melt film, and the melt film and/or the film sheet formed by cooling is/are drawn off by at least one take-off roll. It should particularly be noted that measured values are recorded by means of a measuring device for at least one property of at least one plastics material and/or at least one melt strand /d/ or the melt film and/or the film sheet and/or for a machine parameter of the film-extruding machine and that a first plastics material is a plastics material with varying material properties and a second plastics material is a plastics material with substantially constant material properties, wherein the first and the second plastics materials are fed to the extruder or the extruders in relative proportions, the relative proportions being varied according to the measured values for the property.

The invention relates to a method for calibrating adjusting means ( 120 ) for adjusting a nozzle slot ( 112 ) of a discharge nozzle ( 110 ) for a film track (FB) on a flat film machine ( 100 ), comprising the following steps: specifying a calibration position (KP) for the adjusting means ( 120 ), performing a controlling intervention to change the adjusting position (SP) of the adjusting means ( 120 ), acquiring the reaching of the calibration position (KP) of the adjusting means ( 120 ).

The present invention relates to an apparatus for producing inline stretched tubular foils by the blowing process, having a blown foil system comprising an extruder, a blowing head, a cooling ring, a calibrating basket, a flat laying unit and a reversing turret haul-off, having a stretching system for monoaxially stretching the laid flat foil in the machine direction and with a first thinness control system which operates segmented control zones in the cooling ring to form thinness sections so that, during stretching, a foil is produced with a thickness profile having the smallest possible deviations from the medium foil thickness over the complete foil width. To increase the accuracy and speed of the first thinness section control system, a second thinness section control system is provided which controls two opposing heat sources between the calibrating basket and the flat laying unit and which can be connected to the first thinness section control system.

The invention relates to a blown film system for producing a film tube made of plastics material, comprising: an annular nozzle, out of which a plastic melt having a closed cross-section can be brought; a take-up device, by means of which the plastic melt can be drawn up from the direction of the annular nozzle so as to form the film tube; an air-provision device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and by means of which an amount of air can be provided; and a calibration device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and surrounds the film tube and by means of which the outer circumference of the film tube can be delimited. At least one detector is contained that has a plurality of detection elements, by means of which electromagnetic radiation emitted or reflected at various points of the film tube can be detected, such that at least one planar region and/or contoured region of the film tube can be detected with regard to characteristic properties, wherein the detector comprises at least 32 detection elements.

An apparatus is configured to separate a two-ply film web having a first ply and a second ply, the plies being joined via two side edges. The apparatus has two lengthwise slitting units that make a lengthwise slit into the first ply, with the slits being at a distance from the side edges. A pressing element moves in a direction orthogonal to that of a plane defined by the film web so as to space apart from one another the two plies. The pressing element is in contact only with a region of the film web that lies between one of the two side edges and an adjacent lengthwise slit, and is movable in the plane of the film web, and perpendicular to a longitudinal direction thereof, so that the pressing element is guided between the slit two plies to effect the separation of the film web.