Abstract:
This electrostatic sprayer of coating products with external load, comprises a bowl rotatable about an axis, a turbine for rotating the bowl around this axis, and a plurality of first electrodes distributed around the axis and each capable of emitting, when the sprayer is operating and is at least partly in the direction on an object to be coated, a first ion flux from a first point. The first points are arranged in a first circle centered on and perpendicular to the axis. The sprayer comprises second electrodes each capable of emitting, when the sprayer is operating and mainly or exclusively in the direction of an edge of the bowl, a second ion flux, of the same sign as the first ion flux, from second points arranged in a second circle centered on and perpendicular to the axis, and having a different radius than the first circle.
Abstract:
The bowl according to the invention is provided with magnetic elements disposed around a male part which is adapted to be engaged in a central channel of a drive member, the magnetic elements forming outer radial flanges with respect to this male part. In the spraying device, the bowl is associated with a drive rotor, magnetic coupling means being provided which comprise magnetic bodies disposed on either side of at least one magnet borne by the rotor, while the bowl bears ribs formed in a magnetic material. The effort of magnetic coupling obtained has a radial component with respect to the axis of rotation of the bowl.
Abstract:
This station (10) comprises at least two areas (11, 12) for cleaning/filling a reservoir, each adapted to receive a sub-assembly (7) formed by a reservoir (8) and a sprayer (9) while this sub-assembly (7) is disconnected from the robot. Means (51, 52) for cleaning and/or filling the reservoir and/or the sprayer in each of these areas are provided, while these areas (11, 12) are adapted to be brought (F2, F3) into a position of connection of a sub-assembly (7), disposed in one (11) of them with the cleaning and/or filling means (51, 52). The process consists, inter alia, in positioning (F6) a coating product supply unit (52), in a position of connection with the first sub-assembly (7) received in an area (11) of the station (10) of cleaning/filling.
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:
This electrostatic sprayer of coating products with external load, comprises a bowl rotatable about an axis, a turbine for rotating the bowl around this axis, and a plurality of first electrodes distributed around the axis and each capable of emitting, when the sprayer is operating and is at least partly in the direction on an object to be coated, a first ion flux from a first point. The first points are arranged in a first circle centred on and perpendicular to the axis. The sprayer comprises second electrodes each capable of emitting, when the sprayer is operating and mainly or exclusively in the direction of an edge of the bowl, a second ion flux, of the same sign as the first ion flux, from second points arranged in a second circle centred on and perpendicular to the axis, and having a different radius than the first circle.
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 ionisation 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 Venturi pump used for sucking powder from a supply, diluting the same, then feeding it to a gun via a conveyor pipe. The pump comprises an outer body, at least one powder suction duct, at least two air connections, of which a first air connection is capable of supplying an injector to create a vacuum inside the suction duct and a second air connection is capable of supplying a dilution air circuit separate from the powder flow. The pump including at least one powder outlet nozzle centered on an axis of diffusion, the inlet of which is located downstream from the first air connection and the suction duct. At least one protection barrier contains a non-return valve disposed inside the dilution air circuit and at least one outlet tip of the dilution circuit disposed around the nozzle and also connected to the conveyor pipe.
Abstract:
This device for supplying coating products to the atomizers of an installation for spraying coating products on objects to be displaced by a conveyor, comprises at least one principal tank, adapted to supply secondary tanks each intended for an atomizer, at least one station for distributing the contents of the principal tank between the secondary tanks, and means for displacing the full secondary tanks towards application robots adapted to displace said atomizers opposite said objects. Each secondary tank forms with the atomizer for which it is intended, a sub-assembly adapted to be displaced, by the afore-mentioned displacement means, between an application member and the distribution station, and vice versa.
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:
This atomizer makes it possible to spray a lubricant product along a spraying axis and comprises a first passage for the product which is centered on the spraying axis, a nozzle which is centered on the spraying axis, and a core which is disposed coaxially inside the nozzle. The atomizer also comprises a second passage for ejecting a first jet of air, which is arranged around the first passage in a peripheral direction with respect to the spraying axis and which, in operation, confers a helical direction on the first jet of air. In addition, the first passage is defined between the core and the nozzle and is formed by a plurality of separate passage sections.