US 4,362,124 AGranted

Analog paint output control

AssigneeRansburg Corporation

InventorGunther Fleig

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Abstract

A coating material quantity control system for the coating of articles in a production line operation having a plurality of coating material dispensing devices. Each device is connected to a plurality of coating material feed lines carrying various coating materials, each associated with a separate flow control device. A program control device, upon initiation of the selection of a new coating material type, assures the sequence of the necessary changeover operations. A common control is provided for the flow control devices associated with each coating material dispensing device. The program control device also controls control parameters in each such common control for the selected coating material type, and for variations in size of that portion of the article being coated which is before a particular coating material dispensing device.

Claims10

Dependent claims

A control system for the coating of articles in a production operation in which the articles are conveyed sequentially past an atomizing device for atomizing coating material, a plurality of different coating material sources, and means for coupling the atomizing device to the different coating material sources, the control system including a plurality of coating material pressure regulators, one for each different coating material to be dispensed from the atomizing device, the means for coupling the atomizing device to the different coating material sources including the coating material pressure regulator, the coating material pressure regulator including a control input, an analog coating material pressure control means for generating a signal related to the desired coating material pressure to be maintained by the coating material pressure regulator, the analog coating material pressure control means including a control input and a controlled output, means for coupling the control input of the coating material pressure regulator to the controlled output of the analog coating material pressure control means, a plurality of signal sources, each providing a signal corresponding to one of a plurality of selected desired different coating material pressures, and means for coupling the signal sources to the analog coating material pressure control means including a plurality of switches and means for switching the switches in a selected desired sequence corresponding to the sequence in which the articles are conveyed past the atomizing device and the characteristics of the different coating materials and the articles themselves to insure that each article is coating substantially uniformly with the proper amount of a selected coating material.

A control system for controlling the quantity of coating material applied to articles sequentially conveyed past an atomizing device comprising:

a coating material pressure regulator, means for coupling the coating material pressure regulator to the atomizing device and to a source of coating material, for regulating the pressure at which coating material is supplied to the atomizing device, the pressure regulator including a control input,
a control line coupled to the control input, and a control line pressure regulator coupled to the control line and to a pressure source, for regulating the pressure on the control line, the control line pressure regulator including a pressure-setting mechanism for setting the pressure at which the regulator operates,
motor means, means for coupling the motor means to the pressure-setting mechanism for changing the pressure setting of the control line pressure regulator and motor control means for controlling the motor, the motor control means comprising a bridge circuit having first and second inputs, and a motor drive means coupled to the bridge and to the motor means for driving the motor,
the first input comprising a feedback means for indicating the pressure setting of the control line pressure regulator,
the second input comprising a program control means for controlling the coating material pressure in a selected, desired sequence corresponding to the sequence in which articles to be coated are conveyed past the atomizing device, and the characteristics of the articles and the coating material.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/261,930Filed 8 May 1981 · continuation
Priority: DE 28193022 May 1978
Granted: 7 Dec 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B05B 7/2486
With means, e.g. a container, for supplying liquid or other fluent material to a discharge device: with means for supplying liquid or other fluent…
B05B 5/08
Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other…:…
B05B 7/32
In which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid: the fed liquid or other fluent…
B05B 12/00
Arrangements for controlling delivery