oWTP –optical Web-Tension-Profile– scanner

oWTP: optical Web-Tension-Profile scanner

Optische Ausleuchtung mittels oWTP-Scanner
Optische Ausleuchtung mittels oWTP-Scanner

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Our offer

 

  • Measurement of the web tension profile

  • Patented optical determination of the trailing edge

  • Contactless, portable inline measurement of the web tension profile

  • Tests on the web transport test rig under laboratory conditions

  • On-site tests under industrial conditions

 

 

  • Identification of deviations in flatness
     
  • Improved web transport

  • Development of optimally flat webs

  • Increased product quality

  • Enhanced process reliability, e.g. by preventing folds, poor sealing, and film deformation

  • Collaboration in bilateral R&D projects, some of which are publicly funded

Your benefits

 

  • Effective quality assurance

  • Identification of measures to optimize web transport

  • Improved web transport and machine runability of film webs

  • Inline measurements during processing without stopping the production
Inside view of the prototype oWTP scanner
© Fraunhofer IVV
Inside view of the prototype oWTP scanner
Optical illumination using the oWTP scanner
© Fraunhofer IVV
Optical illumination using the oWTP scanner
Trailing edge of a film with longitudinal folds, determined with the oWTP scanner
© Fraunhofer IVV
Trailing edge of a film with longitudinal folds, determined with the oWTP scanner

The fingerprint of your web


The film is subjected to an adhesion force on a deflection roller for reproducible representation of a characteristic trailing edge, like the adhesion between the layers of film in a roll. The optical measurement is performed by defined illumination of the measurement area. The specially developed software for this appraises the geometric shape and position of the trailing edge and correlates this with the web tension profile. The shape and position of the trailing edge allow conclusions to be drawn about the web tension distribution in the web.

The integration of the oWTP scanner into our web transport test rig enables optical measurement of the web tension profile (e.g. determination of the properties of packaging materials under practically relevant processing conditions/speeds), simulation of detrimental influences, and analysis of the stress/load. The incorporation of additional components and the influence of machine components on the web transport can also be studied.