Method for producing a distribution wall
Method for producing a spray wall drilled with a network of holes for the pressurised fluid substance to pass through so as to be sprayed in fine droplets. The method includes the steps of (a) moulding a nozzle having a front wall integrally formed with an assembly wall, the assembly wall surrounding the front wall, the front wall having a curved initial configuration upon removal from the mould; (b) drilling the curved front wall with a network of holes having a defined initial orientation; and (c) deforming the drilled curved front wall into a final spray configuration defining a spray wall, the defined initial orientation of the holes being subsequently modified.
1 . A method of manufacturing a spray wall that is drilled with holes through which a pressurized fluid product passes so as to be sprayed in small droplets, the method comprising the following steps:
a—moulding in a mould a nozzle comprising a curved front wall and an assembly wall that are integrally formed, the assembly wall surrounding the curved front wall, the front wall having a curved initial configuration upon removal from the mould, wherein in the curved initial configuration the front wall is curved inwardly,
b—drilling the curved front wall while the front wall is curved inwardly with a network of holes having a defined initial orientation,
c—deforming the drilled curved front wall from the curved initial configuration into a final spray configuration defining a spray wall that is flat, the defined initial orientation of the holes being subsequently modified.
2 . The method according to claim 1 , wherein the front wall and the integrally assembly wall are made from a mouldable, deformable and drillable material.
3 . The method according to claim 1 , wherein, in step b—, the defined initial orientation of the holes is parallel.
4 . The method according to claim 1 , wherein, in step b—, the holes are drilled simultaneously with a divided laser beam.
5 . The method according to claim 1 , wherein step b-comprises drilling 10 to 500 holes having diameters lying in a range from 1 μm to 100 μm.
6 . The method according to claim 1 , wherein step b-comprises drilling 10 to 500 holes having diameters lying in a range from 5 μm to 30 μm.
7 . The method according to claim 1 , wherein step b-comprises drilling 10 to 500 holes having diameters lying in a range from 5 μm to 20 μm.
8 . The method according to claim 1 , wherein, in step c—, the deformation of the drilled curved front wall is permanent, made by means of a movable pin which comes into contact with the drilled curved front wall in order to push the curved front wall into the final spray flat configuration.
9 . The method according to claim 8 , wherein the movable pin and/or the drilled curved front wall are at an elevated temperature above ambient temperature at the time of their mutual contact.
10 . The method according to claim 1 , wherein, in step c—, the deformation of the drilled curved front wall is elastic and reversible.
11 . The method according to claim 1 , wherein the final spray configuration of the spray wall is substantially planar.
12 . The method according to claim 1 , wherein the spray wall is inserted into an assembly housing of a nozzle in a fluid dispenser head.