Electrostatic powder-coating gun
First Claim
1. An electrostatic powder-coating gun having a gun barrel, comprising:
- a powder duct which is connectable to a supply conduit for a powder-air-mixture and is arranged along the longitudinal axis of the gun barrel towards the work to be coated and terminating in a mouth;
a high-voltage generator which is connectable to a power supply line;
an electrode supporting tube extending through the powder duct in axial direction thereof; and
a high-voltage electrode which is carried by the supporting tube and which protrudes beyond the mouth of the powder duct towards the work and is connected to the high-voltage generator via a conductor passing through the supporting tube, wherein the high-voltage generator and the powder duct are disposed in series along the longitudinal axis of the gun barrel, andwherein the powder duct comprises a toroidal powder duct coaxial with the electrode supporting tube and an annular channel extending to said mouth, and a supply port for the powder-air-mixture, extending into the toroidal powder duct tangentially, at an inclination to the longitudinal axis.
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Accused Products
Abstract
An electrostatic powder-coating gun is provided which comprises a powder duct which is connected to a supply conduit for a powder-air-mixture and arranged along the longitudinal axis of the gun barrel and having an open mouth towards the work to be coated, a high-voltage generator, an electrode supporting tube extending through the powder duct in axial direction thereof, and a high-voltage electrode located on the supporting tube and protruding beyond the mouth of the powder duct towards the work. The high-voltage generator and the powder duct are disposed in series along the longitudinal axis of the powder tube in such a way that the powder duct is adjacent the muzzle of the gun barrel. The powder duct is comprised of a toroidal duct and an annular channel extending therefrom and opening to the outside.
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Citations
15 Claims
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1. An electrostatic powder-coating gun having a gun barrel, comprising:
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a powder duct which is connectable to a supply conduit for a powder-air-mixture and is arranged along the longitudinal axis of the gun barrel towards the work to be coated and terminating in a mouth; a high-voltage generator which is connectable to a power supply line; an electrode supporting tube extending through the powder duct in axial direction thereof; and a high-voltage electrode which is carried by the supporting tube and which protrudes beyond the mouth of the powder duct towards the work and is connected to the high-voltage generator via a conductor passing through the supporting tube, wherein the high-voltage generator and the powder duct are disposed in series along the longitudinal axis of the gun barrel, and wherein the powder duct comprises a toroidal powder duct coaxial with the electrode supporting tube and an annular channel extending to said mouth, and a supply port for the powder-air-mixture, extending into the toroidal powder duct tangentially, at an inclination to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrostatic powder-coating gun, comprising:
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a gun housing; a powder duct within said housing and having a supply port flow connectable to a supply conduit for a powder-air-mixture, arranged along a longitudinal axis of the gun toward the work to be coated; a high-voltage generator connectable to a power supply, said generator disposed within said gun housing; an electrode supporting tube extending through the powder duct along the longitudinal axis thereof; a high-voltage electrode mounted to the supporting tube and protruding beyond a mouth of the powder duct towards the work, connected to the high-voltage generator via a conductor passing through the supporting tube, the powder duct comprising a toroidal powder duct coaxial with the electrode supporting tube and opening into an annular channel extending along the longitudinal axis of the powder duct to the mouth, the supply port for the powder-air-mixture flow connected into the toroidal powder duct tangentially. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification