SPRAYER FOR A LIQUID COATING PRODUCT AND SPRAYING FACILITY COMPRISING SUCH A SPRAYER
This sprayer gives the possibility of projecting a liquid coating product along a spraying axis, and comprises a first passage of a product sheet, which is centered on the spraying axis, and a second passage for ejecting an air sheet which co-axially surrounds the first passage. The sprayer further comprises a third passage for ejecting another air sheet which is co-axially positioned inside the first passage, a nozzle centered on the spraying axis, and a core, co-axially positioned inside the nozzle so that the first passage is defined between the core and the nozzle. The sprayer further comprises a vibrator which is capable of vibrating at least the nozzle or the core.
1 . A sprayer of a liquid coating product along a spraying axis, comprising:
a first passage of a product sheet, which is centered on the spraying axis, and
a second passage for ejecting an air sheet which co-axially surrounds the first passage,
a third passage for ejecting another air sheet which is co-axially positioned inside the first passage,
a nozzle centered on the spraying axis, and
a core, co-axially positioned inside the nozzle so that the first passage is defined between the core and the nozzle,
wherein the sprayer further comprises a vibrator which is capable of vibrating at least the nozzle or the core.
2 . The sprayer according to claim 1 , wherein, during operation, the third passage gives the other air sheet a divergent direction, relatively to the spraying axis, in a spraying direction.
3 . The sprayer according to claim 1 , wherein, during operation, the second passage gives the air sheet a divergent direction, relatively to the spraying axis, in a direction of the spraying.
4 . The sprayer according to claim 1 , wherein, during operation, at least one passage among the second passage and the third passage gives the air sheet or the other air sheet a helical direction relatively to the spraying axis.
5 . The sprayer according to claim 4 , wherein the sprayer comprises a chamber into which open:
at least one first air supply conduit, along an axial direction, and
at least one second air supply conduit, along an ortho-radial direction relatively to the spraying axis,
and which supplies the second passage.
6 . The sprayer according to claim 4 , wherein the sprayer comprises a chamber which is supplied through an air supply conduit and air ejection holes which are supplied by this chamber and which, during operation, together supply the air sheet.
7 . The sprayer according to claim 1 , wherein the vibrator uses an ultrasound technology.
8 . The sprayer according to claim 1 , wherein the core extends along the spraying axis and beyond the nozzle, with a bowl.
9 . The sprayer according to claim 8 , wherein the bowl has a bell shape which diverges, relatively to the spraying axis, in a direction of the spraying.
10 . The sprayer according to claim 8 , wherein the inside of the bowl may be cleaned by injecting a rinsing product into the third passage.
11 . A facility for spraying a liquid coating product on a part, this facility comprising:
a confinement chamber,
a product supply block,
an electro-pneumatic control box, and
at least one sprayer of the product,
wherein the sprayer is according to claim 1 .
12 . The facility according to claim 11 , wherein the sprayer is according to claim 5 and wherein the facility comprises means for adjusting the air flow in the first air supply conduit and in the second air reply conduit.