METHOD AND APPARATUS FOR CONTROLLING PATTERN-WIDTH OF COATING LIQUID DISPENSED FROM A NOZZLE

    公开(公告)号:US20190201929A1

    公开(公告)日:2019-07-04

    申请号:US16234920

    申请日:2018-12-28

    Applicant: TTNS INC.

    CPC classification number: B05B12/082 B05D1/02

    Abstract: Disclosed is a method for controlling the pattern-width of a coating liquid dispensed from a nozzle. The method includes the steps of: dispensing the coating liquid downward from the nozzle in a dispensing position on a measurement reference line to photograph with a camera positioned at a predetermined horizontal distance from the measurement reference line arranged perpendicularly to a coating reference surface; calculating the pattern-width of the coating liquid on the coating reference surface from image data obtained by photographing the coating liquid dispensed from the nozzle in the dispensing position with the camera; comparing the calculated pattern-width of the coating liquid with a coating liquid reference pattern-width; and adjusting dispensing pressure by increasing or decreasing pressure of air supplied to a pressure container that provides the coating liquid to the nozzle when the calculated pattern-width of the coating liquid is outside the reference allowed error.

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