Process for the control and adjustment of the flow of a viscous

Details Process for the control and adjustment of the flow of a viscous Process for the control and adjustment of the flow of a viscous

1986-02-24

1987-05-19

Morgenstern, Norman

Coating processes

Measuring, testing, or indicating

118663, 118712, 427 10, 427256, 427286, B05D 126

Patent

active

046667326

ABSTRACT:
A process for the regulation or control of the flow of a viscous liquid, such as an adhesive or plastic substance, which is applied as seam (1) on a workpiece (2) by an applicator device (3) guided by a robot, whereby the viscous liquid of the applicator device is continuously supplied from a cylinder (7) in which a piston (9), shiftable by a drive mechanism (1) exerts a constant pressure on the liquid. According to the process, the path (x.sub.i) is measured which is passed by the piston (9) during the time in which the robot passes through a certain track section (n). The measured value (x.sub.i) for the piston path is compared to a set value (x.sub.s) for the piston path and the difference (x.sub.s -x.sub.i) is added during the subsequent passing of the same track section during the next work cycle, as a correction set value (K) algebraically to a basic set value (f.sub.sg) for a regulation or control of the nozzle opening of the applicator device (3). In this manner the influence of viscosity changes and deterioration of the nozzle opening of the thickness of the applied seam are eliminated.

REFERENCES:
patent: 1987197 (1935-01-01), Krueger et al.
patent: 4251566 (1981-02-01), Gingerich
patent: 4367244 (1983-01-01), Holmes
patent: 4417934 (1983-11-01), Vaugham

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