Windmöller & Hölscher Kg

Windmoeller & Hoelscher Kg

Windmöller & Heilscher Kg

Martin Backmann

Markus Bussmann

Torsten Schmitz

Karsten Golubski

Tobias Kulgemeyer

Ansgar Avermeyer

Hermann-Josef Jäckering

Bernd Liesbrock

Juergen Linkies

Jens Minnerup

Klemens Sensen

Gerhard Middelberg

Tim Kirchhoff

Lennart Ederleh

Melanie Schuh

Frank Hoffmann

Jens Goldenstein

Ingo Rübbelke

Thomas Knoke

Markus Joppe

Holger Frische

Ingo Putsch

Jürgen Linkies

Jens Althermeler

Ingo Ruebbelke

Ingo Hehmann

Manuel Sollert

Raphael Gross

Markus Bussman

Wolfgang Hoffmann

The invention relates to a method for a model-based optimization of a film product during a production on a film extrusion line () by means of a production model (PM) of the film extrusion line (), comprising the following steps:

Method for a model-based optimization of a film product during a production on a film extrusion line

The invention relates to a stretching device for stretching a plastic film in the transport direction thereof, having a first roll, which can be driven by a first drive and can be rotated at a first rotational speed, and having a second roll, which can be driven by a second drive and can be rotated at a second rotational speed, wherein the second rotational speed is greater than the first rotational speed, and the second roll is arranged downstream of the first roll in the transport path of the plastic film, wherein at least one of the rolls is a roll through which air can flow inwards from the outside. According to the invention at least one roll through which air can flow can be continuously cleaned.

Stretching device and method for stretching a plastic film in the transport direction thereof

A method for a model-based determination of model parameters (MP) of a production model (PM) of a film extrusion line, comprising:

Method for determining model parameters of a production model of a film extrusion line

The invention relates to an apparatus for producing tubular films stretched in-line by blow molding with an extruder, a film blowing line, a lay-flat unit, an oscillating haul-off unit, and a stretching line for monoaxially stretching the film laid flat in machine direction. According to the invention, the stretching line is arranged above the extruder between the lay-flat unit and the oscillating haul-off unit.

Apparatus for producing films stretched in-line

The invention describes a process for starting up a film production in a film manufacturing machine, in particular a blown film machine, by means of a control device, comprising the following steps:

Method for starting or terminating production of a film in a film manufacturing machine, film manufacturing machine and computer program product

The invention relates to a monitoring method for monitoring a film bubble (FB) in a discharge region () downstream of a discharge nozzle () of a blown film device (), comprising the following steps:

Monitoring method for monitoring a film bubble in a discharge region downstream of a discharge nozzle of a blown film device

The invention relates to a blown film line for generating a blown film with at least one extruder for generating at least one melt strand, at least one distribution tool for converting the at least one melt strand into a circulating melt layer, an outlet nozzle for outputting the at least one melt layer, wherein this melt layer forms the blown film, and at least one device for subjecting the blown film to at least one fluid stream, in particular an air stream, for cooling the blown film. At least one pressure-providing device is furnished, with which the blown film may be brought to the device for subjecting the blown film to a fluid stream by means of at least one overpressure and/or one underpressure.

System for producing a blown film

The invention relates to a method () for controlling film production, in which at least one film is produced according to at least one formula information (R), the following steps being carried out: initiation of execution () of a film production process such that a film is produced on the basis of a specific formulation information (R); determination of monitoring information (I) during the execution () of the process; determination of at least one fingerprint (F) on the basis of the specific formula information (R) and on the basis of the monitoring information (I) such that the execution () of the process is characterised on the basis of the fingerprint (F); and comparison of the fingerprint (F) with a control matrix (M) such that at least one comparative result is determined in order to control the film production on the basis of the control matrix (M) as an evaluation basis.

Method for controlling film production

The present invention relates to a method for changing material in an extrusion device comprising at least two supply devices for supplying feedstock for an extruder, comprising the following steps:

Method for changing the material in an extrusion device

Methods for stretch-forming a thermoplastic film comprises: stretching the thermoplastic film between a first roller and a second roller, wherein the first the roller rotates at a first peripheral velocity and the second roller rotates at a second peripheral velocity that is higher than the first peripheral velocity; and advancing the thermoplastic film from the second roller to a third roller, wherein the third roller rotates at a third peripheral velocity that is lower than the second peripheral velocity, wherein a ratio of the third peripheral velocity to the second peripheral velocity is no larger than 0.95. The resulting breathable thermoplastic films may have a basis weight of no larger than 15 g/mand a shrinkage of no larger than 5%.

Breathable thermoplastic film with reduced shrinkage

The invention relates to a method () for controlling a film production in which at least one film is produced depending on at least one specific recipe information (R), where the following steps are performed:

The invention relates to an apparatus and to a method for film production and/or film processing, characterized by a device for determining the flatness and/or evenness of the film and for further processing and/or outputting the determined results.

Apparatus and method for film production and/or film processing

A device and a method for extending a film web along a longitudinal direction thereof include guiding the film web in a travel direction over several rollers, and extending the film web in at least one straining gap which is limited by at least two rollers operated with different circumferential speeds. The web is provided with a temperature gradient, which extends in the direction perpendicular relative to the longitudinal axis of the film web.

Straining device and method for extending a film web

An extrusion device that produces plastic film includes at least two feed units that feed feedstock for an extruder, wherein, in each feed unit an automatic cleaning device is arranged for a removal of feedstock from the feed unit when changing material in the extrusion device.

Extrusion device and extrusion method that produces a plastic film

The present invention relates to a method for the step-by-step guidance of a machine operator of an extrusion device for a film machine when changing from an application formula to a subsequent formula, comprising the following steps:

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Lengerich, Germany

Martin Backmann