EP4061538A1 - Method for producing a distribution wall - Google Patents
Method for producing a distribution wallInfo
- Publication number
- EP4061538A1 EP4061538A1 EP19842867.4A EP19842867A EP4061538A1 EP 4061538 A1 EP4061538 A1 EP 4061538A1 EP 19842867 A EP19842867 A EP 19842867A EP 4061538 A1 EP4061538 A1 EP 4061538A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- spray
- holes
- front wall
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/18—Roses; Shower heads
- B05B1/185—Roses; Shower heads characterised by their outlet element; Mounting arrangements therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
- B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
- B05B11/1025—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem a spring urging the outlet valve in its closed position
Definitions
- the present invention relates to a spray wall of a fluid dispenser head intended to be associated with a dispensing member such as a pump or a valve.
- the dispensing head can be integrated into, or mounted on, the dispensing member.
- the dispensing head may include a bearing surface so as to constitute a pusher on which the user presses to actuate the dispensing member.
- the dispensing head can be devoid of a bearing surface. This type of fluid product dispensing head is frequently used in the fields of perfumery, cosmetics or even pharmacy.
- a conventional dispensing head for example of the pusher type, comprises:
- a support surface on which a user can press with a finger for example the index finger
- an inlet well intended to be connected to an outlet of a distribution device, such as a pump or a valve,
- a nozzle in the form of a cup comprising a substantially cylindrical mounting wall, one end of which is closed by a spray wall forming a spray orifice, the nozzle being mounted along an axis X in the axial mounting housing with its cylindrical wall engaged around of the spindle and its spray wall in axial abutment against the front wall of the spindle.
- the inlet well is connected to the axial mounting housing by a single supply conduit.
- a swirl system at the spray wall of the nozzle.
- a swirl system conventionally comprises several tangential swirl channels which open into a swirl chamber centered on the spray orifice of the nozzle. The swirl system is arranged upstream of the spray orifice.
- a nozzle comprising a spray wall pierced with several spray holes of substantially or perfectly identical diameter, of the order of 1 to 100 ⁇ m, with a tolerance of 20%.
- Such a spray wall would generate a spray whose droplet size is relatively homogeneous.
- the wall is convex and the holes are then divergent. However, the opening angle of the spray remains low.
- the spray wall is of constant thickness, but convex.
- the holes were drilled perpendicular to the plane of the wall, while the wall was still flat.
- the curvature of the wall allows the holes to diverge, once the wall is convex. It is specified that the holes have, after bending, a constant section over their entire length. It is not explained in this document how, or when, the pierced flat wall is curved. In the drawings, the curvature of the crown is small, so the spray opening angle is small.
- the spray wall is made from a strip of stainless steel which is folded, pierced, then folded in the other direction, before being cut, then integrated into a nozzle.
- this theoretical process cannot be industrialized at a lower cost.
- the present invention aims to improve the manufacturing process of document WO2019106315A1, so that it can be easily industrialized.
- the present invention provides a method of manufacturing a spray wall pierced with a network of holes through which the fluid under pressure passes so as to be sprayed in fine droplets, the method comprising the following steps : a- molding a nozzle comprising a front wall and a mounting wall made in one piece, the mounting wall surrounding the front wall, the front wall having an initial convex, concave or convex configuration at the exit of the mold, b- pierce the curved front wall with a network of holes having a defined initial orientation, c- deform the domed front wall drilled into a final configuration spray defining a spray wall, the defined initial orientation of the holes thereby being changed.
- the front wall and the one-piece mounting wall are made of a suitable moldable, deformable and pierceable material, such as plastic, metal, etc.
- the defined initial orientation of the holes is preferably parallel.
- drilling non-parallel holes for example already divergent.
- two sets of separate holes can be provided, the holes of a series being parallel, but the holes of the two series having different orientations.
- step b- the holes are preferably drilled simultaneously, advantageously using a divided laser beam. More precisely, a basic laser beam is divided by appropriate means to form partial laser beams (identical or different) which will simultaneously impact the curved front wall.
- the partial laser beams are preferably parallel, but they can also be divergent.
- step b- comprises drilling 10 to 500 holes having diameters of the order of 1 to 100 ⁇ m, advantageously of the order of 5 to 30 ⁇ m, and preferably of the order of 5 to 20 ⁇ m .
- step c- the deformation of the domed front wall (concave or convex) pierced is permanent, achieved by means of a movable pin which comes into contact with the domed front wall pierced to push it into the final spray configuration.
- the movable spindle and / or the pierced convex front wall are hot at the moment of their mutual contact.
- step c- the deformation of the pierced convex front wall is elastic and reversible, for example obtained temporarily by the pressurized fluid which impacts the drilled convex front wall to bring it into the final configuration of spraying (flat or convex in the opposite direction), then returns to its initial convex configuration.
- the final spray configuration of the spray wall is substantially planar. But preferably, the final spray pattern of the spray wall is domed inversely with respect to the front wall.
- the present invention also defines a nozzle comprising a spray wall and a mounting wall made in one piece, the mounting wall surrounding the spray wall, the spray wall being obtained from an initially convex front wall, which has been formed. drilled with a network of holes, then then deformed into a final spray configuration defining a spray wall, the defined initial orientation of the holes being thus modified, in which the spray wall can have a thickness of the order of 0.01 mm to 1mm, advantageously from 0.05 mm to 0.2 mm.
- the spray wall may have a diameter of the order of 0.3 mm to 2 mm, advantageously from 0.6 mm to 1 mm.
- the spray wall can be drilled from 10 to 500 holes having diameters of the order of 1 to 100 ⁇ m, advantageously of the order of 5 to 30 ⁇ m, and preferably of the order of 5 to 20 ⁇ m.
- the mounting wall can comprise a massive ring which is directly connected to and surrounds the spraying wall, this massive ring having a minimum thickness corresponding to at least twice that of the spraying wall, this massive ring advantageously having a frustoconical shape in the direction of the spray wall.
- This massive crown is particularly advantageous during molding. This is because the material sets very quickly on contact with the impression of the mold. By having a large volume of hot plastic material as close as possible to the front wall, which constitutes a zone of small thickness, a heat reservoir is created making it possible to fill this zone. Re-bonding is inevitable when going around a spindle, however when the two material fronts that meet are at a temperature close to the transformation temperature, then this line is not or hardly visible.
- the zone of the front wall is the last to fill because it has a small thickness, which constitutes a brake on the flow of the material, because in contact with the steel of the nozzle. mold which cools it: if it is frozen, the impression is no longer filled. Therefore, the less surface there is in contact with the steel (at the end of filling), the more the material will retain its heat, and therefore its fluidity, and the filling will be improved.
- the mounting wall comprises an annular bearing flange which extends around the spraying wall, the spraying wall being arranged set back from this annular bearing flange, so as not to damage the spray wall when fitting the nozzle by pressing on the annular bearing flange.
- the spray wall is housed at the bottom of a bowl projectingly bordered by the annular bearing rim.
- the invention also defines a fluid dispenser head provided with a mounting housing, a nozzle, made according to any one of the preceding claims, being inserted into the mounting housing.
- This housing can also accommodate other rooms, such as one or more filters.
- the spirit of the invention resides in the fact of deforming a non-planar domed front wall which results from the one-piece molding in a nozzle.
- the subsequent flattening or reverse bending, once the holes have been drilled, generates a divergence or convergence of the holes, depending on the side considered. It is even conceivable to use the method of the invention to create a spray wall with converging jets to create a phenomenon of dispersion by collision.
- Figure 1 is a vertical cross-sectional view through a nozzle according to a first embodiment of the invention
- Figure 2 is a vertical cross-sectional view through a pump equipped with a dispensing head incorporating the nozzle of fig 1,
- Figure 3 is an enlarged view of part of the dispensing head of Figure 2 incorporating the nozzle of Figure 1,
- Figures 4a to 4c are enlarged cross-sectional views to illustrate the method of manufacturing the spray wall of the nozzle of Figures 1 to 3, and
- Figures 5 to 8 are enlarged cross-sectional views of alternative embodiments of the nozzle according to the invention.
- the nozzle 2 has a conventional overall configuration in the form of a small cup comprising a substantially cylindrical mounting wall 21 and a spray wall 26. These two walls 21 and 26 are made in one piece by molding / injection of plastic material. The spray wall 26 and at least an adjacent part of the mounting wall 21 are made of the same material.
- An internal chamber 20 is formed in the nozzle: in operation, the pressurized fluid product fills this internal chamber 20 before passing through the holes O of the spray wall 26 to be sprayed in the form of fine droplets, which are can qualify as spray.
- the spray wall 26 is pierced with 10 to 500 holes or orifices O having diameters of the order of 1 to 100 ⁇ m, advantageously of the order of 5 to 30 ⁇ m, and preferably of the order of 5 to 20. pm.
- the spray wall 26 is convex outwardly: it can also be said to be convex.
- the holes O pass through this convex domed wall with divergent orientations, so as to form an open-angle spray.
- the spray wall 26 has a constant wall thickness on the order of 0.01 mm to 1 mm, preferably 0.05 mm to 0.2 mm.
- the spray wall has a diameter of the order of 0.3 mm to 2 mm, preferably 0.6 mm to 1 mm.
- the holes O can be arranged in concentric circles and have identical diameters, or on the contrary, different diameters, the diameter of the holes of the outer circle possibly being larger or smaller than that of the holes of the inner circle.
- the mounting wall 21 surrounds the spray wall 26 and connects to it at a solid ring 22, the volume of which is much greater than that of the spray wall 26. It can also be said that the minimum thickness of the crown 22 corresponds to more than double, or even triple, that of the spray wall 26.
- the ring 22 advantageously has a frustoconical cross section in the direction of the spray wall 26. Preferably, the ring 22 forms upstream of the spray wall 26 has a small annular centering chamfer 221, the function of which will be given below.
- This massive ring 22 (relative to the spray wall 26) has the function of serving as a reservoir of hot material, during the molding of the nozzle, to form the wall of spray 26. This is why the massive ring 22 connects directly to the spray wall 26, with a much greater thickness than that of the spray wall 26.
- the mounting wall 21 also comprises an annular bearing flange 23 which is arranged around the spray wall 26, or more precisely around the solid ring 22.
- This annular bearing flange 23 projects forward relative to the wall. to the spray wall 26 and to the outer face of the solid ring 22. In other words, the spray wall 26 is set back relative to this annular bearing flange 23.
- a flat surface which comes in contact with the annular bearing rim 23 remains out of contact with the spray wall 26. It is therefore possible to press on this annular bearing rim 23 without risking damage to the spray wall 26, which is all the same fragile in because of its low thickness.
- the mounting wall 21 is also provided on the outside with hooking reliefs 24.
- a dispensing head T is mounted on a dispensing member P, such as a pump or a valve, which has a completely conventional design in the fields of perfumery or pharmacy.
- This distribution member P is actuated by the user by pressing axially with a finger, generally the index finger, on the head T.
- the normal pressure generated by this axial support on the fluid product inside the pump P and the head T is of the order of 5 to 6 bars, and preferably 5.5. at 6 bars. Peaks at 7 to 8 bars are possible, however, but we are then in abnormal conditions of use. Conversely, at the approach of 2.5 bars, the spray deteriorates, between 2.5 and 2.2 bars, the spray is strongly deteriorated, and below 2 bars, there is no more spray.
- the initial pressure generated by the propellant gas is of the order of 12 to 13 bars and then drops, as the aerosol is emptied, to about 6 bars.
- a initial pressure of 10 bars is common in the field of perfumery and cosmetics.
- the pressure of the fluid at the nozzle is of the order of 1 bar, that is to say atmospheric pressure, or even slightly less. .
- these ultrasonic vibration sprayers are outside the scope of the invention.
- the distribution head T comprises a head body 1, on which the nozzle 2 is mounted.
- the head body 1 can be produced by injection molding of plastic material.
- the head body 1 is preferably made in one piece: it can however be made from several parts assembled together.
- the head body 1 comprises a substantially cylindrical peripheral skirt 10 which is closed at its upper end by a plate 14.
- the head body 1 also comprises a connecting sleeve 15 which here extends concentrically inside the head. peripheral skirt 10.
- the connection sleeve 15 extends downwards from the plate 14. It internally defines an inlet well 11 which is open downwards and closed at its upper end by the plate 14.
- the sleeve of connection 15 is intended to be mounted on the free end of an actuating rod P5 of the distribution member P. This actuating rod P5 can be moved back and forth along a longitudinal axis.
- the actuating rod P5 is hollow so as to define a delivery duct in communication with a metering chamber PO of the pump P or of the valve.
- the inlet well 11 extends in the extension of the actuating rod P5 so that the fluid from the metering chamber PO can flow into the inlet well 11.
- the head body 1 defines also a supply duct 13 which connects the inlet well 11 to a mounting housing 12, as can be seen in Figure 2.
- the axial mounting housing 12 is of cylindrical overall configuration, thus defining an inner wall which is substantially cylindrical.
- the supply duct 13 opens into the mounting housing 12 in a centered manner. It can also be noted that the internal wall of the mounting housing 12 has hooking profiles 121 allowing better retention of the nozzle 2, as will be seen below.
- the head body 1 can be engaged in a covering capsule 3 comprising an upper support surface 31 for a finger and a lateral envelope 32 forming a lateral opening 33 for the passage of the nozzle 2.
- the nozzle 2 is engaged in the mounting housing 12 of the head body 1 along the X axis. In the final mounting position shown in FIG. 3, the nozzle is in abutment against the bottom of the mounting housing 12. and the annular bearing flange 23 is disposed substantially at the level of the lateral opening 33.
- the hooking reliefs 24 are engaged with the hooking profiles 121.
- FIGS. 4a to 4d describe the method of manufacturing the nozzle 2.
- nozzle blank 2a comprising a mounting wall 21 identical to that described above and a front wall 26a which is concave from the outside or curved towards the inside of the chamber 20.
- the wall front is full, that is to say without a hole.
- the next step consists in drilling, for example using a laser, parallel holes Ob in the front wall 26a, so as to obtain a concave or domed front wall 26b.
- the holes Ob located at the center of the pierced front wall 26b are substantially perpendicular to the normal, while the holes made away from the center are less and less perpendicular.
- the holes Ob are preferably drilled simultaneously, advantageously using a divided laser beam. More precisely, a basic laser beam is divided by appropriate means M to form partial laser beams Lp (identical or different) which will simultaneously impact the domed front wall 26a.
- the partial laser beams Lp are preferably parallel, but they can also be divergent.
- the pierced concave front wall 26b is deformed with the aid of a movable pin B which is introduced axially into the chamber 20.
- this pin B comprises a thrust wall B26 of convex shape.
- the thrust wall B26 is surrounded by a frustoconical section B21 intended to engage with the annular centering chamfer 221 to center the spindle B and limit its axial movement with respect to the nozzle 2.
- the spindle B will first come into contact with the center of the pierced concave front wall 26b, as can be understood from Figure 4c.
- the thrust wall B26 will thus deform the perforated concave front wall 26b to bring it into the final convex or bulging outward configuration, as can be seen in Figure 4d.
- the spray wall 26 of the invention is then formed. It can be noted that the frustoconical section B21 is in abutment against the annular centering chamfer 221. It should be noted above all that the holes O are divergent, while the holes Ob were parallel. This change in orientation is easily explained by the deformation of the pierced front wall 26b, which was concave, to pass to a convex spray wall.
- the front wall 26a has a constant wall thickness and is convex so as to form a rounded dome.
- the spray wall 26 bulges in the other direction permanently and permanently.
- Figures 5 to 8 show alternative embodiments.
- the pierced front wall 26b has a variable wall thickness: the thickness E at the center being greater than the thickness e at the periphery.
- the Ob holes are only arranged at the periphery, and not in the center, to have strongly divergent O holes.
- the pierced front wall 26b has a cone shape with a tip 26p. This cone will be turned up or flattened during the deformation step.
- the pierced front wall 26b ” is deformed temporarily and not permanently by the pressure of the fluid F present in the chamber 20. Once the pressure has dropped, the convex spray wall 26 ”” returns to the chamber. drilled front wall configuration
- the initial crowning can also be deformed to achieve a planar or even crowned configuration, but to a lesser or greater degree. It can also be noted that the nozzle of the invention does not need a swirl system to generate a spray.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
Method for producing a spray wall (26) drilled with a network of holes (O) for the pressurised fluid substance to pass through so as to be sprayed in fine droplets, the method comprising the following steps: a) moulding a nozzle (2) comprising a front wall integrally formed with a mounting wall (21), the mounting wall (21) 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, c) deforming the drilled curved front wall into a final spray configuration defining a spray wall (26), the defined initial orientation of the holes being subsequently modified.
Description
Procédé de fabrication d’une paroi de distribution Method of manufacturing a distribution wall
La présente invention concerne une paroi de pulvérisation d’une tête de distribution de produit fluide destinée à être associée à un organe de distribution tel qu’une pompe ou une valve. La tête de distribution peut être intégrée à, ou montée sur, l’organe de distribution. La tête de distribution peut comprendre une surface d’appui de manière à constituer un poussoir sur lequel l’utilisateur appuie pour actionner l’organe de distribution. En variante, la tête de distribution peut être dénuée de surface d’appui. Ce genre de tête de distribution de produit fluide est fréquemment utilisé dans les domaines de la parfumerie, de la cosmétique ou encore de la pharmacie. The present invention relates to a spray wall of a fluid dispenser head intended to be associated with a dispensing member such as a pump or a valve. The dispensing head can be integrated into, or mounted on, the dispensing member. The dispensing head may include a bearing surface so as to constitute a pusher on which the user presses to actuate the dispensing member. As a variant, the dispensing head can be devoid of a bearing surface. This type of fluid product dispensing head is frequently used in the fields of perfumery, cosmetics or even pharmacy.
Une tête de distribution classique, par exemple du type poussoir, comprend : A conventional dispensing head, for example of the pusher type, comprises:
- une surface d’appui sur laquelle un utilisateur peut appuyer avec un doigt, par exemple l’index, - a support surface on which a user can press with a finger, for example the index finger,
- un puits d’entrée destiné à être raccordé à une sortie d’un organe de distribution, tel qu’une pompe ou une valve, - an inlet well intended to be connected to an outlet of a distribution device, such as a pump or a valve,
- un logement de montage axial dans lequel s’étend une broche, définissant une paroi latérale et une paroi frontale, et - an axial mounting housing in which extends a pin, defining a side wall and a front wall, and
- un gicleur en forme de godet comprenant une paroi de montage sensiblement cylindrique dont une extrémité est obturée par une paroi de pulvérisation formant un orifice de pulvérisation, le gicleur étant monté selon un axe X dans le logement de montage axial avec sa paroi cylindrique engagée autour de la broche et sa paroi de pulvérisation en butée axiale contre la paroi frontale de la broche. a nozzle in the form of a cup comprising a substantially cylindrical mounting wall, one end of which is closed by a spray wall forming a spray orifice, the nozzle being mounted along an axis X in the axial mounting housing with its cylindrical wall engaged around of the spindle and its spray wall in axial abutment against the front wall of the spindle.
En général, le puits d’entrée est relié au logement de montage axial par un conduit d’alimentation unique. D’autre part, il est commun de former un système de tourbillonnement au niveau de la paroi de pulvérisation du gicleur. Un système de tourbillonnement comprend conventionnellement plusieurs canaux tangentiels de tourbillonnement qui débouchent dans une chambre de tourbillonnement centrée sur l’orifice de pulvérisation du gicleur.
Le système de tourbillonnement est disposé en amont de l’orifice de pulvérisation. Typically, the inlet well is connected to the axial mounting housing by a single supply conduit. On the other hand, it is common to form a swirl system at the spray wall of the nozzle. A swirl system conventionally comprises several tangential swirl channels which open into a swirl chamber centered on the spray orifice of the nozzle. The swirl system is arranged upstream of the spray orifice.
Dans le document EP1878507A2, il est décrit plusieurs modes de réalisation d’un gicleur comprenant une paroi de pulvérisation percée de plusieurs trous de pulvérisation de diamètre sensiblement ou parfaitement identique, de l’ordre de 1 à 100 pm, avec une tolérance de 20%. Une telle paroi de pulvérisation générerait un spray dont la taille des gouttelettes est relativement homogène. Dans un mode de réalisation de ce document, la paroi est bombée et les trous sont alors divergents. L’angle d’ouverture du spray reste toutefois faible. In document EP1878507A2, several embodiments of a nozzle are described comprising a spray wall pierced with several spray holes of substantially or perfectly identical diameter, of the order of 1 to 100 μm, with a tolerance of 20%. . Such a spray wall would generate a spray whose droplet size is relatively homogeneous. In one embodiment of this document, the wall is convex and the holes are then divergent. However, the opening angle of the spray remains low.
Dans le document EP1698399A1 , la paroi de pulvérisation est d’épaisseur constante, mais bombée. Les trous ont été percés perpendiculairement au plan de la paroi, alors que la paroi était encore plane. La courbure de la paroi permet de faire diverger les trous, une fois la paroi bombée. Il est précisé que les trous présentent, après bombage, une section constante sur toute leur longueur. Il n’est pas expliqué dans ce document de quelle manière, ni à quel moment, la paroi plane percée est bombée. Sur les dessins, la courbure du bombage est faible, de sorte que l’angle d’ouverture du spray est faible. In EP1698399A1, the spray wall is of constant thickness, but convex. The holes were drilled perpendicular to the plane of the wall, while the wall was still flat. The curvature of the wall allows the holes to diverge, once the wall is convex. It is specified that the holes have, after bending, a constant section over their entire length. It is not explained in this document how, or when, the pierced flat wall is curved. In the drawings, the curvature of the crown is small, so the spray opening angle is small.
Dans le document W02019106315A1 , la paroi de pulvérisation est réalisée à partir d’une bande d’inox qui est pliée, percée, puis pliée dans l’autre sens, avant d’être découpée, puis intégrée dans un gicleur. Ce procédé théorique n’est malheureusement pas industrialisable à moindre coût. In document WO2019106315A1, the spray wall is made from a strip of stainless steel which is folded, pierced, then folded in the other direction, before being cut, then integrated into a nozzle. Unfortunately, this theoretical process cannot be industrialized at a lower cost.
La présente invention a pour but d’améliorer le procédé de fabrication du document WO2019106315A1 , afin qu’il soit facilement industrialisable. The present invention aims to improve the manufacturing process of document WO2019106315A1, so that it can be easily industrialized.
Pour atteindre ce but, la présente invention propose un procédé de fabrication d’une paroi de pulvérisation percée d’un réseau de trous à travers lesquels le produit fluide sous pression passe de manière à être pulvérisé en fines gouttelettes, le procédé comprenant les étapes suivantes : a- mouler un gicleur comprenant une paroi frontale et une paroi de montage réalisées de manière monobloc, la paroi de montage entourant la
paroi frontale, la paroi frontale présentant en sortie de moule une configuration initiale bombée, concave ou convexe, b- percer la paroi frontale bombée avec un réseau de trous présentant une orientation initiale définie, c- déformer la paroi frontale bombée percée dans une configuration finale de pulvérisation définissant une paroi de pulvérisation, l’orientation initiale définie des trous étant ainsi modifiée. To achieve this goal, the present invention provides a method of manufacturing a spray wall pierced with a network of holes through which the fluid under pressure passes so as to be sprayed in fine droplets, the method comprising the following steps : a- molding a nozzle comprising a front wall and a mounting wall made in one piece, the mounting wall surrounding the front wall, the front wall having an initial convex, concave or convex configuration at the exit of the mold, b- pierce the curved front wall with a network of holes having a defined initial orientation, c- deform the domed front wall drilled into a final configuration spray defining a spray wall, the defined initial orientation of the holes thereby being changed.
Par rapport au procédé de fabrication du document WO201 9106315A1 , on peut noter que le procédé de la présente invention: With respect to the manufacturing process of document WO201 9106315A1, it can be noted that the process of the present invention:
• Part d’une paroi qui est moulée dans une configuration bombée, donc pas de déformation initiale, • Part of a wall that is molded in a convex configuration, so no initial deformation,
• Supprime l’étape de découpe et d’assemblage, puisque la paroi est monobloc et intégrée au gicleur, • Eliminates the cutting and assembly step, since the wall is one-piece and integrated into the nozzle,
• Facilite les étapes de perçage et de déformation, étant donné que l’on peut se servir de la paroi de montage comme organe de préhension ou de référence. • Facilitates the drilling and deformation steps, since the mounting wall can be used as a gripper or reference.
Avantageusement, la paroi frontale et la paroi de montage monobloc sont réalisées avec une matière moulable, déformable et perçable appropriée, telle qu’une matière plastique, un métal, etc. Advantageously, the front wall and the one-piece mounting wall are made of a suitable moldable, deformable and pierceable material, such as plastic, metal, etc.
Dans l’étape b-, l’orientation initiale définie des trous est de préférence parallèle. Cependant, on peut aussi envisager dans certains cas de percer des trous non parallèles, par exemple déjà divergents. On peut par exemple prévoir deux séries de trous distincts, les trous d’une série tant parallèles, mais les trous des deux séries ayant des orientations différentes. In step b-, the defined initial orientation of the holes is preferably parallel. However, it is also possible in certain cases to envisage drilling non-parallel holes, for example already divergent. For example, two sets of separate holes can be provided, the holes of a series being parallel, but the holes of the two series having different orientations.
Dans l’étape b-, les trous sont de préférence percés simultanément, avantageusement à l’aide d’un faisceau laser divisé. Plus précisément, un faisceau laser de base est divisé par des moyens appropriés pour former des faisceaux laser partiels (identiques ou différents) qui vont impacter simultanément la paroi frontale bombée. Les faisceaux laser partiels sont de préférence parallèles, mais ils peuvent aussi être divergents.
Avantageusement, l’étape b- comprend de percer 10 à 500 trous ayant des diamètres de l’ordre de 1 à 100 pm, avantageusement de l’ordre de 5 à 30 pm, et de préférence de l’ordre de 5 à 20 pm. In step b-, the holes are preferably drilled simultaneously, advantageously using a divided laser beam. More precisely, a basic laser beam is divided by appropriate means to form partial laser beams (identical or different) which will simultaneously impact the curved front wall. The partial laser beams are preferably parallel, but they can also be divergent. Advantageously, step b- comprises drilling 10 to 500 holes having diameters of the order of 1 to 100 μm, advantageously of the order of 5 to 30 μm, and preferably of the order of 5 to 20 μm .
Selon un premier mode de réalisation préféré, dans l’étape c-, la déformation de la paroi frontale bombée (concave ou convexe) percée est permanente, réalisée au moyen d’une broche mobile qui vient en contact de la paroi frontale bombée percée pour la pousser dans la configuration finale de pulvérisation. De préférence, la broche mobile et/ou la paroi frontale bombée percée sont chaudes au moment de leur contact mutuel. According to a first preferred embodiment, in step c-, the deformation of the domed front wall (concave or convex) pierced is permanent, achieved by means of a movable pin which comes into contact with the domed front wall pierced to push it into the final spray configuration. Preferably, the movable spindle and / or the pierced convex front wall are hot at the moment of their mutual contact.
En variante, dans l’étape c-, la déformation de la paroi frontale bombée percée est élastique et réversible, par exemple obtenue de manière temporaire par le fluide sous pression qui impacte la paroi frontale bombée percée pour l’amener dans la configuration finale de pulvérisation (plane ou bombée en sens inverse), puis revient ensuite dans sa configuration initiale bombée. As a variant, in step c-, the deformation of the pierced convex front wall is elastic and reversible, for example obtained temporarily by the pressurized fluid which impacts the drilled convex front wall to bring it into the final configuration of spraying (flat or convex in the opposite direction), then returns to its initial convex configuration.
Selon un mode de réalisation, la configuration finale de pulvérisation de la paroi de pulvérisation est sensiblement plane. Mais de préférence, la configuration finale de pulvérisation de la paroi de pulvérisation est bombée de manière inverse par rapport à la paroi frontale. According to one embodiment, the final spray configuration of the spray wall is substantially planar. But preferably, the final spray pattern of the spray wall is domed inversely with respect to the front wall.
La présente invention définit également un gicleur comprenant une paroi de pulvérisation et une paroi de montage réalisées de manière monobloc, la paroi de montage entourant la paroi de pulvérisation, la paroi pulvérisation étant obtenue à partir d’une paroi frontale initialement bombée, qui a été percée avec un réseau de trous, puis ensuite déformée dans une configuration finale de pulvérisation définissant une paroi de pulvérisation, l’orientation initiale définie des trous étant ainsi modifiée, dans lequel la paroi de pulvérisation peut présenter une épaisseur de de l’ordre de 0.01 mm à 1mm, avantageusement de 0.05 mm à 0.2 mm. D’autre part, la paroi de pulvérisation peut présenter un diamètre de l’ordre de 0.3 mm à 2 mm, avantageusement de 0.6 mm à 1 mm. La paroi de pulvérisation peut être percée de 10 à 500 trous ayant des diamètres de l’ordre de 1 à 100 pm,
avantageusement de l’ordre de 5 à 30 pm, et de préférence de l’ordre de 5 à 20 pm. The present invention also defines a nozzle comprising a spray wall and a mounting wall made in one piece, the mounting wall surrounding the spray wall, the spray wall being obtained from an initially convex front wall, which has been formed. drilled with a network of holes, then then deformed into a final spray configuration defining a spray wall, the defined initial orientation of the holes being thus modified, in which the spray wall can have a thickness of the order of 0.01 mm to 1mm, advantageously from 0.05 mm to 0.2 mm. On the other hand, the spray wall may have a diameter of the order of 0.3 mm to 2 mm, advantageously from 0.6 mm to 1 mm. The spray wall can be drilled from 10 to 500 holes having diameters of the order of 1 to 100 µm, advantageously of the order of 5 to 30 μm, and preferably of the order of 5 to 20 μm.
Selon un aspect fort intéressant, la paroi de montage peut comprendre une couronne massive qui est directement reliée à et entoure la paroi de pulvérisation, cette couronne massive présentant une épaisseur minimale correspondant au moins au double de cette de la paroi de pulvérisation, cette couronne massive présentant avantageusement une forme tronconique en direction de la paroi de pulvérisation. Cette couronne massive est particulièrement avantageuse lors du moulage. En effet, La matière fige très rapidement au contact de l’empreinte du moule. En ayant un volume de matière plastique important et chaud le plus proche possible de la paroi frontale, qui constitue une zone de faible épaisseur, on crée un réservoir de chaleur permettant de remplir cette zone. Le recollement est inévitable quand on fait le tour d’une broche, cependant lorsque les deux fronts de matières qui se rencontrent sont à une température proche de la température de transformation, alors cette ligne n’est pas ou peu visible. Dans le cas du moulage d’un gicleur, la zone de la paroi frontale est la dernière à se remplir car elle présente une faible épaisseur, ce qui constitue un frein à l’écoulement de la matière, car en contact de l’acier du moule qui la refroidit : si elle est gelée, on ne remplit plus l’empreinte. Par conséquent, moins il y a de surface en contact avec l’acier (au moment de la fin de remplissage), plus la matière conservera sa chaleur, et donc sa fluidité, et le remplissage sera amélioré. According to a very interesting aspect, the mounting wall can comprise a massive ring which is directly connected to and surrounds the spraying wall, this massive ring having a minimum thickness corresponding to at least twice that of the spraying wall, this massive ring advantageously having a frustoconical shape in the direction of the spray wall. This massive crown is particularly advantageous during molding. This is because the material sets very quickly on contact with the impression of the mold. By having a large volume of hot plastic material as close as possible to the front wall, which constitutes a zone of small thickness, a heat reservoir is created making it possible to fill this zone. Re-bonding is inevitable when going around a spindle, however when the two material fronts that meet are at a temperature close to the transformation temperature, then this line is not or hardly visible. In the case of the molding of a nozzle, the zone of the front wall is the last to fill because it has a small thickness, which constitutes a brake on the flow of the material, because in contact with the steel of the nozzle. mold which cools it: if it is frozen, the impression is no longer filled. Therefore, the less surface there is in contact with the steel (at the end of filling), the more the material will retain its heat, and therefore its fluidity, and the filling will be improved.
Selon une autre caractéristique avantageuse, la paroi de montage comprend un rebord annulaire d’appui qui s’étend autour la paroi de pulvérisation, la paroi de pulvérisation étant disposée en retrait de ce rebord annulaire d’appui, de manière à ne pas endommager la paroi de pulvérisation lors du montage du gicleur par appui sur le rebord annulaire d’appui. En d’autres termes, la paroi de pulvérisation est logée au fond d’une cuvette bordée de manière saillante par le rebord annulaire d’appui. Ainsi, et tout particulièrement lorsque la paroi de pulvérisation est bombée vers
l’extérieur, on élimine tout risque de la casser ou détériorer lors du montage du gicleur. According to another advantageous characteristic, the mounting wall comprises an annular bearing flange which extends around the spraying wall, the spraying wall being arranged set back from this annular bearing flange, so as not to damage the spray wall when fitting the nozzle by pressing on the annular bearing flange. In other words, the spray wall is housed at the bottom of a bowl projectingly bordered by the annular bearing rim. Thus, and especially when the spray wall is convex towards outside, any risk of breaking it or damaging it when fitting the nozzle is eliminated.
L’invention définit aussi une tête de distribution de produit fluide pourvu d’un logement de montage, un gicleur, réalisé selon l'une quelconque des revendications précédentes, étant inséré dans le logement de montage. Ce logement peut également accueillir d’autres pièces, comme par exemple un ou plusieurs filtres. The invention also defines a fluid dispenser head provided with a mounting housing, a nozzle, made according to any one of the preceding claims, being inserted into the mounting housing. This housing can also accommodate other rooms, such as one or more filters.
L’esprit de l’invention réside dans le fait de déformer une paroi frontale bombée non plane qui est issue du moulage monobloc dans un gicleur. La mise à plat ultérieure ou le bombage inverse, une fois les trous percés, engendre une divergence ou convergence des trous, en fonction du coté considéré. On peut même envisager d’utiliser le procédé de l’invention pour créer une paroi de pulvérisation à jets convergents pour créer un phénomène de dispersion par collision. The spirit of the invention resides in the fact of deforming a non-planar domed front wall which results from the one-piece molding in a nozzle. The subsequent flattening or reverse bending, once the holes have been drilled, generates a divergence or convergence of the holes, depending on the side considered. It is even conceivable to use the method of the invention to create a spray wall with converging jets to create a phenomenon of dispersion by collision.
L’invention sera maintenant plus amplement décrite en référence aux dessins joints, donnant à titre d’exemples non limitatifs, plusieurs modes de réalisation de l’invention. The invention will now be more fully described with reference to the accompanying drawings, giving, by way of non-limiting examples, several embodiments of the invention.
Sur les figures : In the figures:
La figure 1 est une vue en coupe transversale verticale à travers un gicleur selon une première forme de réalisation de l’invention, Figure 1 is a vertical cross-sectional view through a nozzle according to a first embodiment of the invention,
La figure 2 est une vue en coupe transversale verticale à travers une pompe équipée d’une tête de distribution incorporant le gicleur de la figue 1 ,Figure 2 is a vertical cross-sectional view through a pump equipped with a dispensing head incorporating the nozzle of fig 1,
La figure 3 est une vue agrandie d’une partie de la tête de distribution de la figure 2 incorporant le gicleur de la figue 1 , Figure 3 is an enlarged view of part of the dispensing head of Figure 2 incorporating the nozzle of Figure 1,
Les figures 4a à 4c sont des vues agrandies en coupe transversale visant à illustrer le procédé de fabrication de la paroi de pulvérisation du gicleur des figures 1 à 3, et Figures 4a to 4c are enlarged cross-sectional views to illustrate the method of manufacturing the spray wall of the nozzle of Figures 1 to 3, and
Les figures 5 à 8 sont des vues agrandies en coupe transversale de variantes de réalisation du gicleur selon l’invention. Figures 5 to 8 are enlarged cross-sectional views of alternative embodiments of the nozzle according to the invention.
Le gicleur 2 présente une configuration globale conventionnelle sous la forme d’un petit godet comprenant une paroi de montage sensiblement cylindrique 21 et une paroi de pulvérisation 26. Ces deux parois 21 et 26 sont
réalisées de manière monobloc par moulage/injection de matière plastique. La paroi de pulvérisation 26 et au moins une partie adjacente de la paroi de montage 21 sont réalisés avec le même matériau. The nozzle 2 has a conventional overall configuration in the form of a small cup comprising a substantially cylindrical mounting wall 21 and a spray wall 26. These two walls 21 and 26 are made in one piece by molding / injection of plastic material. The spray wall 26 and at least an adjacent part of the mounting wall 21 are made of the same material.
Une chambre interne 20 est formée dans le gicleur : en fonctionnement, le produit fluide sous pression remplit cette chambre interne 20 avant de passer à travers les trous O de la paroi de pulvérisation 26 pour être pulvérisé sous forme de fines gouttelettes, que l’on peut qualifier de spray. La paroi de pulvérisation 26 est percée de 10 à 500 trous ou orifices O ayant des diamètres de l’ordre de 1 à 100 pm, avantageusement de l’ordre de 5 à 30 pm, et de préférence de l’ordre de 5 à 20 pm. La paroi de pulvérisation 26 est bombée vers l’extérieur : on peut également dire qu’elle est convexe. Les trous O traversent cette paroi bombée convexe avec des orientations divergentes, de manière à former un spray à angle ouvert. La paroi de pulvérisation 26 présente une épaisseur de paroi constante de l’ordre de l’ordre de 0.01 mm à 1 mm, avantageusement de 0.05 mm à 0.2 mm. D’autre part, la paroi de pulvérisation présente un diamètre de l’ordre de 0.3 mm à 2 mm, avantageusement de 0.6 mm à 1 mm. An internal chamber 20 is formed in the nozzle: in operation, the pressurized fluid product fills this internal chamber 20 before passing through the holes O of the spray wall 26 to be sprayed in the form of fine droplets, which are can qualify as spray. The spray wall 26 is pierced with 10 to 500 holes or orifices O having diameters of the order of 1 to 100 μm, advantageously of the order of 5 to 30 μm, and preferably of the order of 5 to 20. pm. The spray wall 26 is convex outwardly: it can also be said to be convex. The holes O pass through this convex domed wall with divergent orientations, so as to form an open-angle spray. The spray wall 26 has a constant wall thickness on the order of 0.01 mm to 1 mm, preferably 0.05 mm to 0.2 mm. On the other hand, the spray wall has a diameter of the order of 0.3 mm to 2 mm, preferably 0.6 mm to 1 mm.
Les trous O peuvent être disposés en cercles concentriques et présenter des diamètres identiques, ou au contraire, des diamètres différents, le diamètre des trous du cercle extérieur pouvant être plus grand ou plus petit que celui des trous du cercle intérieur. The holes O can be arranged in concentric circles and have identical diameters, or on the contrary, different diameters, the diameter of the holes of the outer circle possibly being larger or smaller than that of the holes of the inner circle.
La paroi de montage 21 entoure la paroi de pulvérisation 26 et se raccorde à elle au niveau d’une couronne massive 22, dont le volume est bien supérieur à celui de la paroi de pulvérisation 26. On peut aussi dire que l’épaisseur minimal de la couronne 22 correspond à plus du double, voire le triple, de celle de la paroi de pulvérisation 26. La couronne 22 présente avantageusement une section transversale tronconique en direction de la paroi de pulvérisation 26. De préférence, la couronne 22 forme en amont de la paroi de pulvérisation 26 un petit chanfrein annulaire de centrage 221 , dont la fonction sera donnée ci-après. Cette couronne massive 22 (par rapport à la paroi de pulvérisation 26) a pour fonction de servir de réservoir de matière chaude, lors du moulage du gicleur, pour former la paroi de
pulvérisation 26. C’est pourquoi la couronne massive 22 se raccorde directement à la paroi de pulvérisation 26, avec une épaisseur bien supérieure à celle de la paroi de pulvérisation 26. The mounting wall 21 surrounds the spray wall 26 and connects to it at a solid ring 22, the volume of which is much greater than that of the spray wall 26. It can also be said that the minimum thickness of the crown 22 corresponds to more than double, or even triple, that of the spray wall 26. The ring 22 advantageously has a frustoconical cross section in the direction of the spray wall 26. Preferably, the ring 22 forms upstream of the spray wall 26 has a small annular centering chamfer 221, the function of which will be given below. This massive ring 22 (relative to the spray wall 26) has the function of serving as a reservoir of hot material, during the molding of the nozzle, to form the wall of spray 26. This is why the massive ring 22 connects directly to the spray wall 26, with a much greater thickness than that of the spray wall 26.
La paroi de montage 21 comprend également un rebord annulaire d’appui 23 qui est disposé autour de la paroi de pulvérisation 26, ou plus précisément autour de la couronne massive 22. Ce rebord annulaire d’appui 23 fait saillie vers l’avant par rapport à la paroi de pulvérisation 26 et à la face externe de la couronne massive 22. En d’autres termes, la paroi de pulvérisation 26 est disposée en retrait par rapport à ce rebord annulaire d’appui 23. Ainsi, une surface plane qui vient en contact du rebord annulaire d’appui 23 reste hors de contact de la paroi de pulvérisation 26. On peut donc appuyer sur ce rebord annulaire d’appui 23 sans risquer d’endommager la paroi de pulvérisation 26, qui est tout de même fragile en raison de sa faible épaisseur. The mounting wall 21 also comprises an annular bearing flange 23 which is arranged around the spray wall 26, or more precisely around the solid ring 22. This annular bearing flange 23 projects forward relative to the wall. to the spray wall 26 and to the outer face of the solid ring 22. In other words, the spray wall 26 is set back relative to this annular bearing flange 23. Thus, a flat surface which comes in contact with the annular bearing rim 23 remains out of contact with the spray wall 26. It is therefore possible to press on this annular bearing rim 23 without risking damage to the spray wall 26, which is all the same fragile in because of its low thickness.
La paroi de montage 21 est également pourvue extérieurement de reliefs d’accrochage 24. The mounting wall 21 is also provided on the outside with hooking reliefs 24.
Sur la figure 2, une tête de distribution T est montée sur un organe de distribution P, tel qu’une pompe ou une valve, qui présente une conception tout à fait conventionnelle dans les domaines de la parfumerie ou de la pharmacie. Cet organe de distribution P est actionné par l’utilisateur en appuyant axialement avec un doigt, en général l’index, sur la tête T. In Figure 2, a dispensing head T is mounted on a dispensing member P, such as a pump or a valve, which has a completely conventional design in the fields of perfumery or pharmacy. This distribution member P is actuated by the user by pressing axially with a finger, generally the index finger, on the head T.
Dans le cas d’une pompe, la pression normale générée par cet appui axial sur le produit fluide à l’intérieur de la pompe P et de la tête T est de l’ordre de 5 à 6 bars, et préférentiellement de 5,5 à 6 bars. Des pics à 7 à 8 bars sont toutefois possibles, mais on est alors dans des conditions anormales d’utilisation. A l’inverse, à l’approche de 2,5 bars, le spray s’altère, entre 2,5 et 2,2 bars, le spray est fortement altéré, et en-dessous de 2 bars, il n’y a plus de spray. In the case of a pump, the normal pressure generated by this axial support on the fluid product inside the pump P and the head T is of the order of 5 to 6 bars, and preferably 5.5. at 6 bars. Peaks at 7 to 8 bars are possible, however, but we are then in abnormal conditions of use. Conversely, at the approach of 2.5 bars, the spray deteriorates, between 2.5 and 2.2 bars, the spray is strongly deteriorated, and below 2 bars, there is no more spray.
Dans le cas d’un aérosol équipé d’une valve, la pression initiale générée par le gaz propulseur est de l’ordre de 12 à 13 bars et chute ensuite, au fur et à mesure que l’aérosol se vide, jusqu’à environ 6 bars. Une
pression initiale de 10 bars est courante dans le domaine de la parfumerie et de la cosmétique. In the case of an aerosol equipped with a valve, the initial pressure generated by the propellant gas is of the order of 12 to 13 bars and then drops, as the aerosol is emptied, to about 6 bars. A initial pressure of 10 bars is common in the field of perfumery and cosmetics.
Lorsque l’ensemble comprenant de la tête T et d’une pompe ou valve est monté sur un réservoir de produit fluide, cela constitue un distributeur de produit fluide, qui est entièrement manuel, sans apport d’énergie, notamment électrique. When the assembly comprising the head T and a pump or valve is mounted on a fluid reservoir, this constitutes a fluid dispenser, which is entirely manual, without input of energy, in particular electrical.
En comparaison, dans le domaine technique des pulvérisateurs à vibration ultrasonique (notamment piézoélectrique), la pression du produit fluide au niveau de la buse est de l’ordre de 1 bar, c’est-à-dire la pression atmosphérique, voire légèrement moins. De par la valeur de pression mise en oeuvre et l’énergie utilisée, ces pulvérisateurs à vibration ultrasonique se situent hors du domaine de l’invention. In comparison, in the technical field of ultrasonic vibration sprayers (in particular piezoelectric), the pressure of the fluid at the nozzle is of the order of 1 bar, that is to say atmospheric pressure, or even slightly less. . By virtue of the pressure used and the energy used, these ultrasonic vibration sprayers are outside the scope of the invention.
La tête de distribution T comprend un corps de tête 1 , sur lequel le gicleur 2 est monté. Le corps de tête 1 peut être réalisé par injection moulage de matière plastique. Le corps de tête 1 est de préférence réalisé de manière monobloc : il peut cependant être réalisé à partir de plusieurs pièces assemblées les unes aux autres. The distribution head T comprises a head body 1, on which the nozzle 2 is mounted. The head body 1 can be produced by injection molding of plastic material. The head body 1 is preferably made in one piece: it can however be made from several parts assembled together.
Le corps de tête 1 comprend une jupe périphérique sensiblement cylindrique 10 qui est obturée à son extrémité supérieure par un plateau 14. Le corps de tête 1 comprend également un manchon de raccordement 15 qui s’étend ici de manière concentrique à l’intérieur de la jupe périphérique 10. Le manchon de raccordement 15 s’étend vers le bas à partir du plateau 14. Il définit intérieurement un puits d’entrée 11 qui est ouvert vers le bas et obturé à son extrémité supérieure par le plateau 14. Le manchon de raccordement 15 est destiné à être monté sur l’extrémité libre d’une tige d’actionnement P5 de l’organe de distribution P. Cette tige d’actionnement P5 est déplaçable en va-et-vient selon un axe longitudinal. La tige d’actionnement P5 est creuse de manière à définir un conduit de refoulement en communication avec une chambre de dosage PO de la pompe P ou de la valve. Le puits d’entrée 11 s’étend dans le prolongement de la tige d’actionnement P5 de sorte que le produit fluide issu de la chambre de dosage PO peut s’écouler dans le puits d’entrée 11. Le corps de tête 1 définit également un conduit d’alimentation 13
qui relie le puits d’entrée 11 à un logement de montage 12, comme on peut le voir sur la figure 2. Le logement de montage axial 12 est de configuration globale cylindrique, définissant ainsi une paroi interne qui est sensiblement cylindrique. Le conduit d’alimentation 13 débouche dans le logement de montage 12 de manière centrée. On peut également remarquer que la paroi interne du logement de montage 12 présente des profils d’accrochage 121 permettant un meilleur maintien du gicleur 2, comme on le verra ci-après. The head body 1 comprises a substantially cylindrical peripheral skirt 10 which is closed at its upper end by a plate 14. The head body 1 also comprises a connecting sleeve 15 which here extends concentrically inside the head. peripheral skirt 10. The connection sleeve 15 extends downwards from the plate 14. It internally defines an inlet well 11 which is open downwards and closed at its upper end by the plate 14. The sleeve of connection 15 is intended to be mounted on the free end of an actuating rod P5 of the distribution member P. This actuating rod P5 can be moved back and forth along a longitudinal axis. The actuating rod P5 is hollow so as to define a delivery duct in communication with a metering chamber PO of the pump P or of the valve. The inlet well 11 extends in the extension of the actuating rod P5 so that the fluid from the metering chamber PO can flow into the inlet well 11. The head body 1 defines also a supply duct 13 which connects the inlet well 11 to a mounting housing 12, as can be seen in Figure 2. The axial mounting housing 12 is of cylindrical overall configuration, thus defining an inner wall which is substantially cylindrical. The supply duct 13 opens into the mounting housing 12 in a centered manner. It can also be noted that the internal wall of the mounting housing 12 has hooking profiles 121 allowing better retention of the nozzle 2, as will be seen below.
Optionnellement, le corps de tête 1 peut être engagé dans une capsule d’habillage 3 comprenant surface supérieure d’appui 31 pour un doigt et une enveloppe latérale 32 formant une ouverture latérale 33 pour le passage du gicleur 2. Optionally, the head body 1 can be engaged in a covering capsule 3 comprising an upper support surface 31 for a finger and a lateral envelope 32 forming a lateral opening 33 for the passage of the nozzle 2.
Le gicleur 2, précédemment décrit, est engagé dans le logement de montage 12 du corps de tête 1 selon l’axe X. En position finale de montage représentée sur la figure 3, le gicleur est en butée contre le fond du logement de montage 12 et le rebord annulaire d’appui 23 est disposé sensiblement au niveau de l’ouverture latérale 33. Les reliefs d’accrochage 24 sont en prise avec les profils d’accrochage 121. The nozzle 2, previously described, is engaged in the mounting housing 12 of the head body 1 along the X axis. In the final mounting position shown in FIG. 3, the nozzle is in abutment against the bottom of the mounting housing 12. and the annular bearing flange 23 is disposed substantially at the level of the lateral opening 33. The hooking reliefs 24 are engaged with the hooking profiles 121.
On se référera maintenant aux figures 4a à 4d pour décrire le procédé de fabrication du gicleur 2. Reference will now be made to FIGS. 4a to 4d to describe the method of manufacturing the nozzle 2.
Tout d’abord, on commence par mouler une ébauche de gicleur 2a comprenant une paroi de montage 21 identique à celle décrite précédemment et une paroi frontale 26a qui est concave de l’extérieur ou bombée vers l’intérieur de la chambre 20. La paroi frontale est pleine, c’est- à-dire sans trou. First of all, we begin by molding a nozzle blank 2a comprising a mounting wall 21 identical to that described above and a front wall 26a which is concave from the outside or curved towards the inside of the chamber 20. The wall front is full, that is to say without a hole.
L’étape suivante consiste à percer, par exemple à l’aide d’un laser, des trous parallèles Ob dans la paroi frontale 26a, de manière à obtenir une paroi frontale concave ou bombée percée 26b. Ceci est représenté sur les figures 4b et 4c. Les trous Ob situés au centre de la paroi frontale percée 26b sont sensiblement perpendiculaires à la normale, alors que les trous réalisés en éloignement du centre sont de moins en moins perpendiculaires. En pratique, les trous Ob sont de préférence percés simultanément, avantageusement à l’aide d’un faisceau laser divisé. Plus précisément, un
faisceau laser de base est divisé par des moyens appropriés M pour former des faisceaux laser partiels Lp (identiques ou différents) qui vont impacter simultanément la paroi frontale bombée 26a. Les faisceaux laser partiels Lp sont de préférence parallèles, mais ils peuvent aussi être divergents. The next step consists in drilling, for example using a laser, parallel holes Ob in the front wall 26a, so as to obtain a concave or domed front wall 26b. This is shown in Figures 4b and 4c. The holes Ob located at the center of the pierced front wall 26b are substantially perpendicular to the normal, while the holes made away from the center are less and less perpendicular. In practice, the holes Ob are preferably drilled simultaneously, advantageously using a divided laser beam. More precisely, a basic laser beam is divided by appropriate means M to form partial laser beams Lp (identical or different) which will simultaneously impact the domed front wall 26a. The partial laser beams Lp are preferably parallel, but they can also be divergent.
Au cours d’une étape suivante, la paroi frontale concave percée 26b est déformée à l’aide d’une broche mobile B qui est introduite axialement dans la chambre 20. Ceci est visible sur la figure 4c. cette broche B comprend une paroi de poussée B26 de forme convexe. La paroi de poussée B26 est entourée par une section tronconique B21 destinée à venir en prise avec le chanfrein annulaire de centrage 221 pour centrer la broche B et limiter son mouvement axial par rapport au gicleur 2. Lors de son déplacement axial, la broche B va d’abord venir en contact avec le centre de la paroi frontale concave percée 26b, comme on peut le comprendre de la figure 4c. La paroi de poussée B26 va ainsi déformer la paroi frontale concave percée 26b pour l’amener dans la configuration finale convexe ou bombée vers l’extérieur, comme on peut le voir sur la figure 4d. La paroi de pulvérisation 26 de l’invention est alors formée. On peut noter que la section tronconique B21 est en butée contre le chanfrein annulaire de centrage 221. Il faut surtout remarquer que les trous O sont divergents, alors que les trous Ob étaient parallèles. Ce changement d’orientation s’explique aisément par la déformation de la paroi frontale percée 26b, qui était concave, pour passer à une paroi de pulvérisation convexe. In a next step, the pierced concave front wall 26b is deformed with the aid of a movable pin B which is introduced axially into the chamber 20. This is visible in FIG. 4c. this pin B comprises a thrust wall B26 of convex shape. The thrust wall B26 is surrounded by a frustoconical section B21 intended to engage with the annular centering chamfer 221 to center the spindle B and limit its axial movement with respect to the nozzle 2. During its axial displacement, the spindle B will first come into contact with the center of the pierced concave front wall 26b, as can be understood from Figure 4c. The thrust wall B26 will thus deform the perforated concave front wall 26b to bring it into the final convex or bulging outward configuration, as can be seen in Figure 4d. The spray wall 26 of the invention is then formed. It can be noted that the frustoconical section B21 is in abutment against the annular centering chamfer 221. It should be noted above all that the holes O are divergent, while the holes Ob were parallel. This change in orientation is easily explained by the deformation of the pierced front wall 26b, which was concave, to pass to a convex spray wall.
Dans le mode de réalisation qui vient d’être décrit, la paroi frontale 26a a une épaisseur de paroi constante et est bombée de manière à former un dôme arrondi. La paroi de pulvérisation 26 est bombée dans l’autre sens de manière définitive et permanente. Les figures 5 à 8 montrent des variantes de réalisation. In the embodiment which has just been described, the front wall 26a has a constant wall thickness and is convex so as to form a rounded dome. The spray wall 26 bulges in the other direction permanently and permanently. Figures 5 to 8 show alternative embodiments.
Sur la figure 5, la paroi frontale percée 26b’ présente une épaisseur de paroi variable : l’épaisseur E au centre étant supérieure à l’épaisseur e en périphérie. Les trous Ob sont uniquement disposés en périphérie, et non au centre, pour avoir des trous O fortement divergents.
Sur la figure 6, la paroi frontale percée 26b” présente une forme de cône avec une pointe 26p. Ce cône sera retroussé ou aplati lors de l’étape de déformation. In FIG. 5, the pierced front wall 26b 'has a variable wall thickness: the thickness E at the center being greater than the thickness e at the periphery. The Ob holes are only arranged at the periphery, and not in the center, to have strongly divergent O holes. In Figure 6, the pierced front wall 26b ”has a cone shape with a tip 26p. This cone will be turned up or flattened during the deformation step.
Sur la figure 7, la paroi frontale percée 26b’” est déformée par une broche B’ ayant une paroi de poussée plane B26’, de manière à obtenir une paroi de pulvérisation plane 26”’, indiquée en traits pointillés. In Figure 7, the pierced front wall 26b "" is deformed by a pin B "having a planar thrust wall B26", so as to obtain a planar spray wall 26 "", indicated in dotted lines.
Sur la figure 8, la paroi frontale percée 26b”” est déformée de manière temporaire et non définitive par la pression du produit fluide F présent dans la chambre 20. Une fois la pression retombée, la paroi de pulvérisation convexe 26”” retourne dans la configuration de la paroi frontale percéeIn FIG. 8, the pierced front wall 26b ”” is deformed temporarily and not permanently by the pressure of the fluid F present in the chamber 20. Once the pressure has dropped, the convex spray wall 26 ”” returns to the chamber. drilled front wall configuration
26b””. 26b ””.
Toujours dans le cadre de l’invention, le bombage initial peut aussi être déformé pour parvenir à une configuration plane ou même bombée, mais avec un degré moindre ou supérieur. On peut également noter que le gicleur de l’invention n’a pas besoin d’un système de tourbillonnement pour générer un spray. Still within the scope of the invention, the initial crowning can also be deformed to achieve a planar or even crowned configuration, but to a lesser or greater degree. It can also be noted that the nozzle of the invention does not need a swirl system to generate a spray.
Grâce à l’invention, on peut réaliser un gicleur monobloc avec une paroi de pulvérisation parfaitement plane ou convexe percés de trous divergents qui ont été percés parallèlement.
Thanks to the invention, it is possible to produce a one-piece nozzle with a perfectly flat or convex spray wall pierced with divergent holes which have been drilled in parallel.
Claims
Revendications Claims
1 Procédé de fabrication d’une paroi de pulvérisation (26 ; 26’” ; 26””) percée d’un réseau de trous (O) à travers lesquels le produit fluide sous pression passe de manière à être pulvérisé en fines gouttelettes, le procédé comprenant les étapes suivantes : a- mouler un gicleur (2) comprenant une paroi frontale (26a) et une paroi de montage (21) réalisées de manière monobloc, la paroi de montage (21) entourant la paroi frontale (26a), la paroi frontale (26a) présentant en sortie de moule une configuration initiale bombée, b- percer la paroi frontale bombée (26a) avec un réseau de trous (Ob) présentant une orientation initiale définie, c- déformer la paroi frontale bombée percée (26b ; 26b’ ; 26b” ; 26b’” ; 26b””) dans une configuration finale de pulvérisation définissant une paroi de pulvérisation (26 ; 26”’ ; 26””), l’orientation initiale définie des trous (O) étant ainsi modifiée. 1 Process for manufacturing a spray wall (26; 26 '”; 26” ”) pierced with a network of holes (O) through which the fluid under pressure passes so as to be sprayed in fine droplets, the method comprising the following steps: a- molding a nozzle (2) comprising a front wall (26a) and a mounting wall (21) made in one piece, the mounting wall (21) surrounding the front wall (26a), the front wall (26a) having an initial convex configuration at the exit of the mold, b- pierce the curved front wall (26a) with a network of holes (Ob) having a defined initial orientation, c- deform the drilled convex front wall (26b; 26b '; 26b ”; 26b'”; 26b ””) in a final spray configuration defining a spray wall (26; 26 ”'; 26” ”), the defined initial orientation of the holes (O) thus being changed .
2.- Procédé selon la revendication 1 , dans lequel la paroi frontale (26a) et la paroi de montage (21) monobloc sont réalisées avec un matiériau moulable, déformable et perçable. 2. A method according to claim 1, wherein the front wall (26a) and the one-piece mounting wall (21) are made of a moldable, deformable and pierceable material.
3.- Procédé selon la revendication 1 ou 2, dans lequel, dans l’étape b-, l’orientation initiale définie des trous (Ob) est parallèle. 3. A method according to claim 1 or 2, wherein, in step b-, the defined initial orientation of the holes (Ob) is parallel.
4.- Procédé selon la revendication 1 , 2 ou 3, dans lequel, dans l’étape b-, les trous (Ob) sont percés simultanément à l’aide d’un faisceau laser divisé. 4. A method according to claim 1, 2 or 3, wherein, in step b-, the holes (Ob) are drilled simultaneously using a divided laser beam.
5- Procédé selon l'une quelconque des revendications précédentes, dans lequel l’étape b- comprend de percer 10 à 500 trous (Ob) ayant des diamètres de l’ordre de 1 à 100 pm, avantageusement de l’ordre de 5 à 30 pm, et de préférence de l’ordre de 5 à 20 pm.
5. Method according to any one of the preceding claims, in which step b- comprises drilling 10 to 500 holes (Ob) having diameters of the order of 1 to 100 μm, advantageously of the order of 5 to 30 µm, and preferably of the order of 5 to 20 µm.
6.- Procédé selon l'une quelconque des revendications précédentes, dans lequel, dans l’étape c-, la déformation de la paroi frontale bombée percée (26b ; 26b’ ; 26b” ; 26b’”) est permanente, réalisée au moyen d’une broche mobile (B ; B’) qui vient en contact de la paroi frontale bombée percée (26b ; 26b’ ; 26b” ; 26b’”) pour la pousser dans la configuration finale de pulvérisation. 6.- Method according to any one of the preceding claims, in which, in step c-, the deformation of the convex front wall drilled (26b; 26b '; 26b ”; 26b'”) is permanent, carried out by means of a movable spindle (B; B ') which comes into contact with the drilled convex front wall (26b; 26b'; 26b ”; 26b '”) to push it into the final spray configuration.
7.- Procédé selon la revendication 6, dans lequel la broche mobile (B ; B’) et/ou la paroi frontale bombée percée (26b ; 26b’ ; 26b” ; 26b’”) sont chaudes au moment de leur contact mutuel. 7.- The method of claim 6, wherein the movable spindle (B; B ’) and / or the domed front wall drilled (26b; 26b’; 26b ”; 26b’ ”) are hot at the time of their mutual contact.
8.- Procédé selon l'une quelconque des revendications 1 à 5, dans lequel, dans l’étape c-, la déformation de la paroi frontale bombée percée (26b””) est élastique et réversible, obtenue de manière temporaire par le fluide sous pression qui impacte la paroi frontale bombée concave percée (26b””) pour l’amener dans la configuration finale de pulvérisation, puis revient ensuite dans sa configuration initiale bombée. 8. A method according to any one of claims 1 to 5, wherein, in step c-, the deformation of the domed front wall pierced (26b ””) is elastic and reversible, obtained temporarily by the fluid. under pressure which impacts the drilled concave convex front wall (26b ””) to bring it into the final spray configuration, then returns to its initial convex configuration.
9.- Procédé selon l'une quelconque des revendications précédentes, dans lequel la configuration finale de pulvérisation de la paroi de pulvérisation (26’”) est sensiblement plane. 9. A method according to any preceding claim, wherein the final spray configuration of the spray wall (26 ") is substantially planar.
10.- Procédé selon l'une quelconque des revendications 1 à 8, dans lequel la configuration finale de pulvérisation de la paroi de pulvérisation (26 ;26””) est bombée de manière inversée par rapport à la paroi frontale bombée (26a). 10. A method according to any one of claims 1 to 8, wherein the final spray configuration of the spray wall (26; 26 ””) is convex inverted with respect to the convex front wall (26a).
11.- Gicleur (2) comprenant une paroi de pulvérisation (26 ; 26’” ; 26””) et une paroi de montage (21) réalisées de manière monobloc, la paroi de montage (21) entourant la paroi de pulvérisation (26 ; 26’” ;
26””), la paroi pulvérisation (26 ; 26’” ; 26””) étant obtenue à partir d’une paroi frontale initialement bombée (26a), qui a été percée avec un réseau de trous (Ob), puis ensuite déformée dans une configuration finale de pulvérisation définissant une paroi de pulvérisation (26 ; 26”’ ; 26””), l’orientation initiale définie des trous (Ob) étant ainsi modifiée, dans lequel la paroi de pulvérisation (26 ; 26”’ ; 26””) présente une épaisseur de de l’ordre de 0.01 mm à 1mm, avantageusement de 0.05 mm à 0.2 mm. 11.- Nozzle (2) comprising a spray wall (26; 26 '”; 26” ”) and a mounting wall (21) made in one piece, the mounting wall (21) surrounding the spray wall (26 ; 26 '”; 26 ””), the spray wall (26; 26 ”; 26” ”) being obtained from an initially convex front wall (26a), which has been drilled with a network of holes (Ob), then subsequently deformed in a final spray configuration defining a spray wall (26; 26 ”'; 26” ”), the defined initial orientation of the holes (Ob) thus being changed, wherein the spray wall (26; 26”'; 26 ””) has a thickness of the order of 0.01 mm to 1mm, advantageously from 0.05 mm to 0.2 mm.
12.- Gicleur (2) selon la revendication 11 , dans lequel la paroi de pulvérisation (26 ; 26”’ ; 26””) présente un diamètre de de l’ordre de 0.3 mm à 1 mm, avantageusement de 0.4 mm à 0.7 mm. 12. A nozzle (2) according to claim 11, wherein the spray wall (26; 26 ”'; 26” ”) has a diameter of the order of 0.3 mm to 1 mm, advantageously from 0.4 mm to 0.7. mm.
13- Gicleur (2) selon la revendication 11 ou 12, dans lequel la paroi de pulvérisation (26 ; 26”’ ; 26””) est percée de 10 à 500 trous (Ob) ayant des diamètres de l’ordre de 1 à 100 pm, avantageusement de l’ordre de 5 à 30 pm, et de préférence de l’ordre de 5 à 20 pm. 13. Nozzle (2) according to claim 11 or 12, wherein the spray wall (26; 26 ”'; 26” ”) is drilled from 10 to 500 holes (Ob) having diameters of the order of 1 to 100 μm, advantageously of the order of 5 to 30 μm, and preferably of the order of 5 to 20 μm.
14.- Gicleur (2) selon la revendication 11 , 12 ou 13, dans lequel la paroi de montage (21) comprend une couronne massive (22) qui est directement reliée à et entoure la paroi de pulvérisation (26 ; 26”’ ; 26””), cette couronne massive (22) présentant une épaisseur minimale correspondant au moins au double de cette de la paroi de pulvérisation (26 ; 26”’ ; 26””), cette couronne massive (22) présentant avantageusement une forme tronconique (221) en direction de la paroi de pulvérisation (26 ; 26”’ ; 26””). 14. A nozzle (2) according to claim 11, 12 or 13, wherein the mounting wall (21) comprises a solid ring (22) which is directly connected to and surrounds the spray wall (26; 26 ”'; 26 ””), this massive crown (22) having a minimum thickness corresponding to at least twice that of the spray wall (26; 26 ”'; 26” ”), this massive crown (22) advantageously having a frustoconical shape (221) towards the spray wall (26; 26 ”'; 26” ”).
15.- Gicleur () selon l'une quelconque des revendications 11 à 14, dans lequel la paroi de montage (21) comprend un rebord annulaire d’appui (23) qui s’étend autour la paroi de pulvérisation (26 ; 26”’ ; 26””), la paroi de pulvérisation (26 ; 26”’ ; 26””) étant disposée en retrait de ce rebord annulaire d’appui (23), de manière à ne pas
endommager la paroi de pulvérisation (26 ; 26’” ; 26””) lors du montage du gicleur par appui sur le rebord annulaire d’appui (23). 15. A nozzle () according to any one of claims 11 to 14, wherein the mounting wall (21) comprises an annular bearing flange (23) which extends around the spray wall (26; 26 ” '; 26 ””), the spray wall (26; 26 ”'; 26” ”) being set back from this annular bearing rim (23), so as not to damage the spray wall (26; 26 '”; 26” ”) when fitting the nozzle by pressing on the annular support rim (23).
16- Tête de distribution de produit fluide (T) pourvu d’un logement de montage (12), un gicleur (2), réalisé selon l'une quelconque des revendications précédentes, étant inséré dans le logement de montage (12).
16- Fluid product dispensing head (T) provided with a mounting housing (12), a nozzle (2) made according to any one of the preceding claims, being inserted into the mounting housing (12).
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PCT/FR2019/052782 WO2021099696A1 (en) | 2019-11-22 | 2019-11-22 | Method for producing a distribution wall |
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EP4061538A1 true EP4061538A1 (en) | 2022-09-28 |
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US (1) | US20220410185A1 (en) |
EP (1) | EP4061538A1 (en) |
CN (1) | CN114728298B (en) |
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JP3890121B2 (en) * | 1997-09-05 | 2007-03-07 | ヤマホ工業株式会社 | Method for producing orifice plate used for spray nozzle |
FR2772010B1 (en) * | 1997-12-09 | 2000-01-28 | Oreal | DISPENSING HEAD WITH MOBILE SHUTTER, MANUFACTURING METHOD AND PACKAGING DEVICE THEREOF |
DE102005010173B4 (en) | 2005-03-05 | 2006-11-16 | Aero Pump GmbH, Zerstäuberpumpen | Discharge hood for a sprayer for spraying a high-viscosity liquid |
FR2903329B3 (en) | 2006-07-10 | 2008-10-03 | Rexam Dispensing Systems Sas | SPRAY NOZZLE, SPRAY DEVICE AND USE THEREOF. |
CN101244634B (en) * | 2007-02-16 | 2012-06-13 | 林观忠 | Silica gel effluent mesh shaping technique |
DE202014101647U1 (en) * | 2014-04-08 | 2015-07-09 | Autefa Solutions Germany Gmbh | nozzle beam |
WO2019106321A1 (en) * | 2017-12-01 | 2019-06-06 | Aptar France Sas | Fluid-product dispensing head |
FR3059573B1 (en) * | 2016-12-02 | 2019-01-25 | Aptar France Sas | HEAD OF DISTRIBUTION OF FLUID PRODUCT |
EP3717136A1 (en) | 2017-12-01 | 2020-10-07 | APTAR France SAS | Method for producing a distribution wall |
EP3717137A1 (en) * | 2017-12-01 | 2020-10-07 | Aptar France SAS | Fluid product dispensing head |
EP3717135B1 (en) * | 2017-12-01 | 2023-01-25 | Aptar France SAS | Head for dispensing fluid product and corresponding method |
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2019
- 2019-11-22 BR BR112022009354-3A patent/BR112022009354B1/en active IP Right Grant
- 2019-11-22 EP EP19842867.4A patent/EP4061538A1/en active Pending
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BR112022009354B1 (en) | 2023-12-12 |
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CN114728298A (en) | 2022-07-08 |
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