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In-line detection of protective film on PVC window frames

The PVC window frames are provided with a protective film to protect them from scratches and dirt. This film is applied to the window profile after it is extruded. Hence, it is necessary to ensure that the film has been applied correctly to the window frame for a smooth production process. To facilitate this assurance, color measurement sensors are used to check the film application.

The colorCONTROL ACS7000 provided by Bestech Australia detects the exact color difference based on spectral color measurement. After the transparent film is applied onto the window frame, the color of the frame changes and a minimal color difference of ΔE = 0.1 is observed. The color sensor identifies whether the film is applied on a frame or not, based on this color difference. Without having a film attached to a frame, the production process is discontinued.

PVC window frames