Control systems for electrostatic powder spraying apparatus
AssigneeEurotec Surface Coating Systems, Ltd.
InventorDavid Hugh Campbell
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Abstract
A method for controlling operation of powder spraying coating apparatus comprising automatically reducing both the discharge current and discharge voltage of the electrostatic charging means as the spray apparatus approaches a workpiece.
Claims21
A method for controlling operation of a powder spray coating apparatus in order to improve powder coating, comprising controlling output power charging a powder by progressively reducing both a discharge current and a discharge voltage as the spray coating apparatus approaches a workpiece wherein said reduction in the discharge current and discharge voltage commences at a distance of separation between the spray coating apparatus and workpiece which is at least 100 mm to provide substantially reproducible coating results during operation of the powder spray coating apparatus.
An electrostatic powder spray coating apparatus comprising an electrostatic charging means and means to control a volume of paint powder sprayed in response to a change in discharge current or discharge voltage of the electrostatic charging means.
Dependencies are inferred from the claim text.