Method for monitoring a film quality and film machine
AssigneeWindmoller & Holscher
InventorsTorsten Schmitz, Daniel Faustmann, Bernd-Alexander Groepper
Life of this patent
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Abstract
The invention relates to a method for monitoring a film quality in the production of a plastic film, comprising the following steps: —determining a first temperature (10) of a film material (1) of the plastic film during a transport of the film material (1), in which the film material (1) is cooled along a conveying direction (2) of the film material (1). The invention further relates to a film machine (50) comprising a device for monitoring a film quality in the production of a plastic film.
Claims16
A method for monitoring a film quality in the production of a plastic film, the method comprising:
- determining a first temperature of a film material of the plastic film at a first determination position during a transport of the film material at which the film material cools along a conveying direction of the film material, wherein the determining of the first temperature occurs on a transport device;
- providing a first temperature-dependent definition of a quality condition of a film quality pertaining to the first determination position;
- determining a second temperature at a second determination position, wherein the first and second determination positions are arranged in an axial direction or in the circumferential direction of the transport device;
- providing a second temperature-dependent definition of the quality condition of the film quality pertaining to the second determination position;
- and
- evaluating the quality condition of the film quality by evaluating the first temperature determined at the first determination position based on the first temperature-dependent definition and the second temperature determined at the second determination position based on the second temperature-dependent definition.
A film machine with a device for monitoring a film quality during the production of a plastic film, the film machine comprising:
- an outlet means configured to deliver film material of the plastic film to a transport device so that at least the film material cools in before or on the transport device;
- and
- a sensor unit for detecting a first temperature of the film material in front of or at the transport device and a control unit for providing a temperature-dependent definition of a quality condition of the film quality and for evaluating the first temperature of the film material on the basis of the temperature-dependent definition of the quality condition, wherein the control unit is adapted to perform a method for monitoring a film quality in the production of a plastic film, comprising:
- determining a first temperature of a film material of the plastic film at a first determination position during a transport of the film material at which the film material cools along a conveying direction of the film material, wherein the determining of the first temperature occurs on a transport device,
- providing a first temperature-dependent definition of a quality condition of a film quality pertaining to the first determination position,
- determining a second temperature at a second determination position, wherein the first and second determination positions are arranged in an axial direction or in the circumferential direction of the transport device,
- providing a second temperature-dependent definition of the quality condition of the film quality pertaining to the second determination position, and
- evaluating the quality condition of the film quality by evaluating the first temperature determined at the first determination position based on the first temperature-dependent definition and the second temperature determined at the second determination position based on the second temperature-dependent definition.
Dependencies are inferred from the claim text.