Abstract:
An apparatus for electrostatically spraying a coating product. The apparatus includes a sprayer with first and second pipes which control the flow of the coating product. Air is controlled by at least one valve. The sprayer includes a device for controlling the opening/closing of the valve, a high voltage unit. A generator includes a module for controlling power supplied to the high voltage unit. The sprayer includes a first sensor suitable for detecting the position of a shutter of the valve relative to a seat and for outputting a signal used by the control module to control the power supplied to the high voltage unit, and a second sensor suitable for detecting the position of a switch positioned on the spray gun and for outputting a signal used by the control module to control the power supply of the high voltage unit.
Abstract:
A device for supplying at least one sprayer with a liquid coating product comprises a plurality of valves for controlling the flow of the coating product to the sprayer, these valves being aligned along a principal axis of the supply device. Each valve comprises a moving needle, a valve body, pneumatic driver for moving the needle in translation, the driver comprising a piston constrained to move in translation with the needle and slidably mounted in a guide body. The principal axis and the separation/approach axis of a valve coincide at a unique point and together define a principal plane of the valve. The separation/approach axis of each valve is contained within a cone centered on an axis perpendicular to the principal axis and belonging to the principal plane of the valve, the apex of the cone being coincident with the unique point.
Abstract:
A device for supplying at least one sprayer with a liquid coating product comprises at least one valve for controlling the flow of the coating product to the sprayer. The valve comprises a moveable needle, a valve body which defines a circulation volume of the coating product and a seat for supporting the needle in the closed configuration of the valve. A pneumatic driver drives the pointer in translation along an axis away from or towards the seat. The pneumatic driver comprises a piston constrained to move in translation with the needle and mounted slidably in a guide body. The pneumatic driver also comprises an end-piece penetrating into a transfer chamber. The communication line links the end-piece or the transfer chamber with a variable-volume chamber defined by the guide body and a first face of the piston.
Abstract:
An electrostatic spray device for spraying a liquid coating product, including a rotating bowl and a device for driving the bowl around a rotational axis, the bowl defining a concave surface for distributing the coating product and an edge which limits an area for the spraying the coating product. The spray device includes an electrode that charges by ionization of drops of the coating product. The electrode is arranged, in relation to the edge and along the rotational axis, opposite the spray area, between the edge and the device for driving the bowl. A second electrode mounted on a stationary body allows the creation of an electrostatic field for transporting drops. A third electrode, which is also mounted on a stationary body, is brought to an intermediate potential between those of the first and second electrodes during the operation of the spray device.
Abstract:
A device for supplying a sprayer with a liquid coating comprises a one valve having a moving needle, a valve body defining a circulation volume for the coating and a seat for supporting the needle. A pneumatic drive for translating the needle along an axis away from or towards the seat comprises a piston constrained to move with the needle and sliding within a guide body. A head and the guide body define a variable volume chamber. The head is constrained to rotate with the volume via slots on the head and corresponding protruding elements on the guide body. The guide body is screwed onto the valve body along the axis. The head includes driving reliefs for rotation of the head around the axis for screwing onto the valve body. A tool for mounting/dismounting the device comprises a maneuvering handle and an end-piece having reliefs complementary to the driving reliefs .
Abstract:
A device for spraying a liquid coating product includes a hub forming or accommodating a liquid feed pipe and a divergent centrifugal deflector having a distribution surface whose overall shape is that of a trumpet bell. Applications include electrostatic painting.
Abstract:
A spray nozzle for electrostatic spraying of a coating product including a needle forming a mobile shutter of a valve for controlling the spraying, which is positioned in a recess of a barrel of the nozzle. The recess defines a surface for guiding the axial translation of the needle along a longitudinal axis of the recess. The needle includes a front shaped for abutting a seat to obstruct a duct for flow of the coating product, a rear portion which interacts with means for controlling the translation of the needle and a central portion comprised between the front end and the rear portion, while a high-voltage unit included in the nozzle is capable of applying a high-voltage to the front end of the needle. A raised portion provided on the central portion of the needle, inside the recess, can increase the electric creepage distance along the central portion.
Abstract:
Rotating projector for a coating product including a spraying device having a circular spraying edge, driving means for driving the spraying device around a rotational axis, a body including primary openings arranged on a primary contour for ejecting primary air jets in a primary direction. The air jets having an axial component and an orthoradial component which are nonzero. The primary direction has a nonzero radial component, which is centrifugal relative to the rotation axis. Each primary jet extends along the rotational axis at a distance from the rotational axis than the radius of the spraying edge. The body includes secondary openings arranged on a secondary contour for ejecting the secondary air jets in a secondary direction having axial and centripetal radial components. The secondary jets hit an external surface of the spraying device. The contours coincide with a circle centered about the rotation axis.
Abstract:
An installation for spraying a coating product on objects, such as motor vehicle bodies, that are moved by a conveyor (4) parallel to a conveying axis (X4) and having base (102) and mobile (104-108) portions. A multi-axis spraying robot (50) is dedicated to spraying a coating product. A multi-axis handling robot (60) is dedicated to maneuvering the mobile portion (104-106-108) of an object (100) to be coated relative to the base portion (102). Each robot is movable parallel to the conveying axis. Ventilation means provide a flow of ventilation air (F1) inside a booth (3), perpendicular to the conveying axis (X4). The spraying and handling robots (50, 60) are both slidably mounted along a same rail (8) parallel to the conveying axis (X4), and can pass each other. The rail is disposed upstream from the objects to be coated (100), in the direction of flow of the ventilation air (F1).
Abstract:
An apparatus for electrostatically spraying a coating product. The apparatus includes a sprayer with first and second pipes which control the flow of the coating product. Air is controlled by at least one valve. The sprayer includes a device for controlling the opening/closing of the valve, a high voltage unit. A generator includes a module for controlling power supplied to the high voltage unit. The sprayer includes a first sensor suitable for detecting the position of a shutter of the valve relative to a seat and for outputting a signal used by the control module to control the power supplied to the high voltage unit, and a second sensor suitable for detecting the position of a switch positioned on the spray gun and for outputting a signal used by the control module to control the power supply of the high voltage unit.