EP3802360B1 - Valve body to be mounted on a cup - Google Patents

Valve body to be mounted on a cup Download PDF

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Publication number
EP3802360B1
EP3802360B1 EP19726413.8A EP19726413A EP3802360B1 EP 3802360 B1 EP3802360 B1 EP 3802360B1 EP 19726413 A EP19726413 A EP 19726413A EP 3802360 B1 EP3802360 B1 EP 3802360B1
Authority
EP
European Patent Office
Prior art keywords
wall
valve
cup
valve body
bearing
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.)
Active
Application number
EP19726413.8A
Other languages
German (de)
French (fr)
Other versions
EP3802360C0 (en
EP3802360A1 (en
Inventor
Hervé BODET
Eric Gaillard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lindal France SAS
Original Assignee
Lindal France SAS
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Filing date
Publication date
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Publication of EP3802360A1 publication Critical patent/EP3802360A1/en
Application granted granted Critical
Publication of EP3802360C0 publication Critical patent/EP3802360C0/en
Publication of EP3802360B1 publication Critical patent/EP3802360B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/48—Lift valves, e.g. operated by push action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38—Details of the container body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/32—Dip-tubes

Definitions

  • the invention relates to a valve body according to the preamble of claim 1.
  • the assembly process is complex and combines several successive operations, involving the creation of sub-assemblies and requiring on-line control tests to guarantee the tightness of the assembled valve.
  • One of the last phases of the assembly is the crimping operation which consists of fitting and sealing the sub-assembly consisting of the one-piece valve body + stem or seat + spring + internal gasket on the cup sub-assembly + outer seal.
  • the stem is placed in the valve body, which itself is placed under the cup, so that the stem passes through a central opening of the cup projecting above the outer face of the cup.
  • the valve body is fixed to the cup by expanding the cup on the exterior face of the valve body.
  • the cup is itself attached to the housing of the aerosol generator by crimping or expansion.
  • the object of the invention is to propose a valve body and a valve which are easy to manufacture and to assemble and which can be used both with commercial metal cups and with cups made of polymer material.
  • valve body With such a valve body, it is possible to dispense with expanding the cup on the valve body, which considerably reduces the variations in dimensions by eliminating the problem associated with wear of the crimping pliers.
  • the orifice of one of the two closure walls is preferably sized to allow an outlet rod for the product contained in the aerosol generator to pass, a rod carried by a valve to be inserted at least partly into the valve body (therefore by a stem) or by a diffuser intended to actuate the valve, the orifice of the other of the two closure walls being sized to allow the product contained in the aerosol generator to enter the valve body.
  • a fixing stud may be provided around the orifice intended to let the product enter the valve body, on the external face of the corresponding closing wall in order to fix to the valve body a dip tube, an anti- sag or other similar device.
  • a first of the two parts of the valve body with a first tubular wall closed at one of its ends by a first of the two closing walls, a first support wall being formed on the external face of the first tubular wall.
  • the face of the first bearing wall opposite the first closing wall constitutes the first of the two bearing surfaces.
  • the second of the two parts of the valve body with the second of the two closing walls and, if necessary (in other words, if the whole of the tubular body is not placed on the other part ), a second tubular wall closed at one of its ends by said second closing wall.
  • a second support wall is formed at the periphery of the second closure wall or on the external face of the second tubular wall.
  • the face of the second support wall opposite the outer face of the second closing wall constitutes the second of the two support surfaces.
  • the means for fixing the first part consist of a first fixing surface formed on the external surface of the first tubular wall inside a projection, with respect to the main axis, of the first bearing surface.
  • said first fixing surface is formed on the edge of the first tubular wall opposite the first closure wall.
  • the means for fixing the second part can be constituted by a second fixing surface formed on the periphery of the second closing wall inside a projection, with respect to the main axis, of the second bearing surface.
  • the second fixing surface is formed on the second tubular wall, preferably on the edge of the second tubular wall opposite the second closure wall.
  • the two fixing surfaces are preferably of superimposable shapes, one of the two fixing surfaces being able to be provided with a welding allowance.
  • This solution is particularly well suited to fixing by welding or by gluing, in particular by ultrasonic welding.
  • the first tubular wall is sized to form the tubular body of the valve body, so that in the assembled state of the valve, the end of the first tubular wall opposite the first closing wall is in contact with the second closing wall of the other part, preferably with the interposition of a seal.
  • the first attachment surface is formed on the edge of the first tubular wall opposite the first closure wall
  • the second attachment surface is formed on the second closure wall, the second bearing surface being formed on the periphery of the second closure wall, the second part having no second tubular wall.
  • the first fixing surface is formed on the outer face of the first tubular wall, preferably on the first bearing wall, preferably in a groove formed on the first wall of bearing inside the first bearing surface
  • the second fixing surface is formed on the edge of the second tubular wall, the second bearing surface being formed on the periphery of the second closure wall or on the outer face of the second tubular wall.
  • first tubular wall and the second tubular wall have superimposable cross-sections and together constitute, in the assembled state of the valve, the tubular body of the valve body.
  • first fixing surface is constituted by the edge of the first tubular wall opposite the first closing wall
  • second fixing surface is constituted by the edge of the second tubular wall opposite the second wall of closing.
  • valve seal against the internal face of the closure wall provided with the dimensioned orifice to allow the product outlet stem located on the valve or on a diffuser to pass.
  • This valve gasket is then sized to ensure the seal between a valve placed in the valve body and the internal face of said closure wall as well as between the product outlet rod (from the stem or from the diffuser) and the hole in the closing wall. It is preferable that the valve gasket be overmolded.
  • cup seal between the cup and one of the bearing walls.
  • the bearing surface in contact with the cup seal is preferably provided with a sealing rib intended to be crushed against the cup seal in the assembled state of the valve.
  • the cup gasket can be sized to also provide sealing at an interface between the two parts of the valve body.
  • the cup seal may be a separate component, in which case it is preferable that the bearing wall considered be provided with a sealing rib intended to be crushed against the cup seal in the assembled state of the valve. He It is also possible to overmold the cup seal on the cup or on the bearing wall of one of the parts of the valve body.
  • the edge of the opening of the cup towards one of the faces of the cup is preferable to deform an annular neck, preferably by forming a flat annular edge, the edge of the neck resting against one of the bearing walls in the assembled state of the valve, preferably against the bearing wall against which the gasket is not interposed. cup.
  • the two parts are fixed to each other by enclosing the cup between them by irreversible fixing of their fixing surfaces to each other.
  • This fixing is preferably carried out by welding, possibly using a welding allowance provided on one of the fixing surfaces, in particular by ultrasonic welding.
  • valve body and more generally the valve of the invention can be used in all positions.
  • the valve is shown with the stem pointing upwards.
  • the references “top” / “bottom” or “upper” / “lower” have only a relative value in relation to the representations of the attached figures. It goes without saying that the valve can be used in all positions and that what is up in the position shown here will not necessarily be up in use.
  • the valve extends longitudinally with respect to a main axis (A), vertical in the representations of the attached figures.
  • the terms “radial”, “axial” and “transverse” refer to this main axis (A).
  • the latter constitutes a separation between the side of the valve intended to be placed inside the housing and the other side intended to be outside the housing.
  • inner and outer refer to elements located on the inner or outer side of the cup.
  • intermediate and outer refer to a particular component (exterior part or interior part) and define what is inside or outside of said component, regardless of whether it is a component located on the face interior or exterior of the cup.
  • the example presented here is a male-type valve with a stem as a valve, part of the stem of which protrudes from the valve.
  • the invention can also be applied to a valve of the female type with, as a valve, a seat located in the valve body and to be actuated by an external rod (generally that of a diffuser) penetrating into the valve.
  • the valve of the invention as presented here consists of a two-piece valve body (20, 30) in which is retained a stem (40), one end (411) of which projects from the valve body.
  • the valve body consists of an outer part (20) and an inner part (30). In the assembled position, the two parts (20, 30) of the valve body block the cup (10) between them, preferably with the interposition of a cup seal (71).
  • the inner part (30) of the valve body has an essentially tubular shape around the axis (A), here a cylindrical shape. It consists of a first cylindrical wall (31) partially closed on one side (lower side) by a first closing wall (32) which is preferably planar and radial. A first orifice (33) is made in the center of the first closure wall (32), through which the product to be extracted penetrates. A first bearing wall (34) annular is placed on the outer face of the first cylindrical wall (31), which first bearing wall (34) is symmetrical with respect to the axis (A) and makes the complete turn of the first cylindrical wall. The peripheral edge of its upper face, face facing the cup, constitutes a first bearing surface (341) annular for the cup.
  • the first support wall (34) is located at a distance from the first closure wall (32) and the first support surface (341) is radial.
  • An annular sealing rib (342) may be formed on the first surface support (341). This sealing rib (342) serves to improve the seal between a cup seal (71) and the interior part (30) of the valve body.
  • the upper face of the first bearing wall (34) has a groove. The bottom of the groove constitutes a first fixing surface (35) for welding the two parts (20, 30) of the valve body.
  • An extra thickness of material (351) can also be provided on the first fixing surface (35) to serve as an energy director during the ultrasonic welding of the two parts (20, 30) of the valve body.
  • the first fixing surface (35) is located inside a projection along the main axis (A) of the first bearing surface (341).
  • the first fixing surface (35) could however be in the extension of the first bearing surface (341), or even be offset upwards.
  • the internal face of the first cylindrical wall (31) may have, close to the first closing surface (32), guide shoulders (311) serving as a housing for the spring (50). In the example represented here, there are three shoulders distributed regularly and symmetrically with respect to the main axis (A).
  • one or more channels (312) can be provided in the first cylindrical wall (31), between the first closing wall (32) and the first support wall (34), to in contact the internal face and the external face of the first cylindrical wall (31).
  • a tenon (321) can be placed on the external face of the first closure wall (32), around the first orifice (33), to allow the attachment of a dip tube (60), an anti-sagging device handheld or other similar device.
  • the outer part (20) of the valve body also has an essentially tubular shape around the axis (A), here a cylindrical shape. It consists of a second cylindrical wall (21) open on one side (lower side) and partially closed on the opposite side (upper side) by a second closing wall (22) which is preferably planar and radial.
  • the edge of the second cylindrical wall (21) opposite the second closure wall (22) constitutes a second fixing surface (25) for welding the two parts (20, 30) of the valve body.
  • the transverse contour of this second attachment surface (25) is identical to the transverse contour of the first attachment surface (35) of the interior part, so that the two transverse contours are superimposable.
  • a second orifice (23) is made in the center of the second closure wall (22), through which the stem of the stem passes in the assembled state of the valve.
  • a second annular bearing wall (24) is placed on the external face of the second cylindrical wall (21), which second bearing wall (24) is symmetrical with respect to the axis (A) and makes the complete turn of the cylindrical wall. Its underside, directed towards the cup, constitutes a second bearing surface (241) for the cup.
  • the second support wall (24) is placed at a distance from the second fixing surface (25) and the second closure wall (22), and the second support surface (241) is radial.
  • the internal face of the second cylindrical wall (21) can be provided with retaining means to hold a valve seal (72), when the latter is not overmoulded, in particular during assembly of the valve.
  • These retaining means may be constituted by the edge of a cavity made in the internal face of the second cylindrical wall (21) close to the second closing wall (22). At this cavity, the inner face of the second cylindrical wall has a larger cross section than in the rest of the second cylindrical wall.
  • Another solution consists in providing a radial peripheral rib or a series of projections behind which the valve seal (72) can be placed and maintained in contact with the second closing wall (22).
  • an annular sealing rib (221) can be placed on the internal face of the second closure wall (22), around the second orifice (23), rib of sealing which rests on the valve seal (72).
  • the first cylindrical wall (31) of the inner part (30) is sized to be able to penetrate into the second cylindrical wall (21) of the outer part (20).
  • the outer diameter of the first cylindrical wall (31) is smaller than the inner diameter of the second cylindrical wall (21).
  • the height of this first cylindrical wall (31) is chosen such that its edge (313) opposite to the first closing wall (32) comes into sealing contact against the valve seal (72) placed against the second closing wall (22) when the valve is in the assembled state.
  • first fixing surface (35) on the inner part (30) in a groove set back from the first bearing surface (341), a guiding and centering effect of the second surface of the attachment (25) relative to the first attachment surface (35) when assembling the valve. This helps to facilitate assembly.
  • the stem (40) is a traditional stem. It consists of a cylindrical wall (41) open at its upper end (411) and closed at its lower end, forming a product outlet channel. One or more orifices (412) placed at the bottom of the outlet channel pass radially through the cylindrical wall to bring the internal face and the external face of said cylindrical wall (41) into contact.
  • the cylindrical wall (41) constitutes the outlet rod of the product.
  • This cylindrical wall is continued by a crown (42) of larger diameter having on its external face vertical channels or vertical ribs allowing the proceeds to bypass the crown.
  • the outer casing of this crown has a diameter slightly smaller than the inner diameter of the main cylindrical wall (31) of the inner part so that it can enter the latter while being guided.
  • the crown (42) On its upper annular face, the crown (42) is provided with a sealing rib (421) to seal with the valve gasket (72).
  • the crown is continued downwards by a guide pin (43) intended to cooperate with the spring (50).
  • the cup (10) can be a conventional cup. Generally, it is formed of a wall (11) provided with a central opening (12) and a peripheral rim (13) intended for its attachment to a casing. A housing seal (73) is placed on the inside face of the peripheral flange to provide a seal between the cup and the housing.
  • the housing gasket can be a separate component or, as in the examples shown here, it can be overmolded to the inside face of the cup.
  • the wall (11) is flat and radial around the opening (12) and straightens upwards at the level of the opening so as to form a neck (121). This neck serves in particular to stiffen the wall at the level of the flat and radial part.
  • valve body of the invention can be used with cups of any shape. Another example of a cup is shown in figure 7 .
  • the seals (71, 72, 73) can be added components, put in place during assembly of the valve. It is also possible that they are overmolded.
  • the valve gasket (72) can be molded onto the inner face of the closing wall (22) of the outer part, while leaving the orifice (23).
  • the cup seal (71) can be overmolded on the inside face of the cup (1), as shown in the figure 6b , or on one of the bearing surfaces (241, 341). If the seal is molded onto a bearing surface, it is possible to dispense with the sealing rib (342).
  • the housing seal (73) can be molded onto the peripheral rim (13) of the cup.
  • the valve is obtained as follows.
  • the valve seal (72) is placed in the bottom of the outer part (20), resting against the internal face of the second closing wall (22).
  • the stem (40) is then introduced by its upper end (411) into the second orifice (23) of the outer part (20) so that the crown (42) is in contact with its sealing rib (421) against the valve seal (72).
  • the spring (50) is placed on the guide pin (43) of the stem.
  • the cup (10) is threaded onto the outer part so that the edge of its opening (12) surrounds the part of the external face of the second cylindrical wall (21) located below the second bearing wall (24), the neck (121) resting against the second bearing surface (241).
  • the cup seal (71) if not overmolded, is placed on the cup.
  • the inner part (30) is then put in place by introducing the first cylindrical wall (31) into the second cylindrical wall (21) of the outer part (20).
  • the spring (50) then takes place between the shoulders (311) located at the bottom of the inner part (30) and presses against the internal face of the first closing wall (32), thus pushing the stem against the joint of valve (72).
  • the second fixing surface (25) located at the free end of the second cylindrical wall (21) of the outer part penetrates into the groove at the bottom of which the first fixing surface (35) is made.
  • the two parts (20, 30) of the valve body are then welded, for example by ultrasound, the extra thickness (351) of material serving as an energy director.
  • the two support surfaces (241, 341) are oriented according to the orientation of the cup at the level of the central opening (12).
  • the wall of the cup is flat and radial around the central opening and the neck: the two bearing surfaces are also flat and radial. If the wall of the cup is tilted around the opening, the bearing surfaces (241, 341) can also be similarly inclined. If the wall of the cup is quite rigid, it is also possible to dispense with the neck (121).
  • the valve shown here is a male type valve.
  • the valve consists of a stem (40) of which a tubular part (41) passes through the outer closure wall (22) via the second orifice (23) and protrudes outside the valve.
  • This tubular part constitutes a rod through which the product exits.
  • the valve body of the invention can also be used to form a female-type valve.
  • the stem (40) is replaced by a seat (sometimes also called a piston) which cooperates with the stem of a diffuser, the stem of the diffuser entering the valve through the second orifice (23) to press on the seat and open the valve.
  • the second orifice (23) is therefore always sized to allow a stem to pass, either the stem itself, or that of the diffuser, foreign to the valve.
  • the inner part (30) can be provided with a surface for welding a pocket and thus form a pocket valve.
  • the two support surfaces (241, 341) consist of continuous surfaces.
  • at least one of the two bearing surfaces may be discontinuous and formed of a succession of sections spaced from each other and distributed over the entire circumference of the outer face of the part in question. It is even possible to envisage the two bearing surfaces being discontinuous.
  • the cup seal is preferably molded onto one or the other of the two bearing surfaces.
  • the cup seal could be placed between the outer part (20) and the cup (10), rather than between the cup (10) and the inner part (30) as shown in the figures.
  • the neck (121) can be made so that it is directed towards the first bearing surface (341).
  • the space in which the stem is located is defined on the one hand by the internal face of the first closing wall (32) and the first cylindrical wall (31) of the internal part (30) , and on the other hand by the inner face of the second closure wall (22) of the outer part associated with the valve seal (72).
  • the first cylindrical wall (31) of the inner part in the second cylindrical wall (21) of the outer part so that these two parts partially overlap.
  • the second cylindrical wall (21) of the outer part must be resized so that its internal diameter is identical to that of the shortened first cylindrical wall (31) of the inner part.
  • the free end of the cylindrical wall (21, 31) bearing one of the fixing surfaces (25, 35) of one of the parts passes through the central opening (12) of the cup to enter in contact with the fixing surface (25, 35) of the other part.
  • the bearing wall (24, 34) of at least one of the two parts is located at a distance from the fixing surface (25, 35) of said part.
  • one of the two parts the outer part for example, has no cylindrical wall (21) and the support wall (24) is located in the extension of the closing wall (22 ), at its periphery.
  • the fixing surface is also placed on the bearing wall, radially more centrally than the first bearing surface.
  • valve seal is molded onto the inner face of the closure wall, the peripheral edge of this valve seal can play the role of centering means, especially since it has no function of sealing with the tubular wall of the other part, since the two are welded together.
  • Another solution consists in providing interlocking between the two parts, for example by making the fixing surfaces so that they are not radial as is the case in the example presented here, but frustoconical and of complementary shapes.
  • the cup can be made of aluminum, tinplate or a polymeric material such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).
  • the two parts (20, 30) of the valve body are preferably made of polymer material, in particular POM, PA, PE, PP or PBT. Seals are made of neoprene, butyl, chlorobutyl, synthetic rubber (Buna ® ) or fluoroelastomer (Viton ® ) type elastomer. If they are overmolded on the cup or on the parts (20, 30) of the valve body, they are preferably made of thermoplastic elastomer (TPE) or thermoplastic polyurethane (TPU).
  • TPE thermoplastic elastomer
  • TPU thermoplastic polyurethane
  • the valve (stem (40) or seat) is for example made of POM, PA or PBT.
  • the spring is made of stainless steel or a polymeric material, such as polyetheretherketone
  • the valve can be used for all kinds of applications, in particular in the cosmetics, pharmaceutical, veterinary, food, technical products, household products, etc. fields.
  • the assembly of the valve is done by fitting then ultrasonic welding of the two parts forming the new valve body which thus imprison the cup. This approach leads to precise control of the assembly parameters and therefore to a reliable assembly in terms of sealing, stem height and valve actuation.
  • valve body no longer risks being deformed as is the case with crimping, which eliminates the risk of the stem getting stuck or requiring too much actuation force.
  • crimping there is also no longer any problem of ribs to be respected, nor any risk of cracking of the cup following its deformation due to the crimping in the opposite direction to the deformation due to the drawing of the cup.
  • the height of the stem (specifically, the protruding end of the stem), no longer depends on the crimping and the wear of the crimping pliers, but on the precision of the molding of the two parts, which is easier to master .
  • the new valve does include an additional component, namely the cup seal (71), but the fact that the cup and valve seals can be overmolded simplifies assembly operations. This overmolding of the gaskets, which no longer need to be fitted, contributes to saving time during the assembly operation, as well as to a gain in the reliability of the sealing of the valve, the gasket not risking no more struggling to position yourself or move around before the end of the assembly of the valve.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)

Description

L'invention concerne un corps de valve selon le préambule de la revendication 1.The invention relates to a valve body according to the preamble of claim 1.

Les valves pour générateurs d'aérosols existant sur le marché sont assemblées à partir d'un certain nombre de composants mettant en jeu des matériaux différents :

  • une coupelle en aluminium ou fer blanc, revêtue d'un vernis ou non ou encore coupelle en matériau polymère ;
  • un joint externe en élastomère ;
  • un corps de valve monobloc en polyoxyméthylène (POM), en polyamide (PA), en polyéthylène (PE) ou en polypropylène (PP), voire en poly(butylène téréphtalate) (PBT) ;
  • un joint interne en élastomère (fréquemment d'une famille chimique différente de celle du joint externe) ;
  • une soupape en POM ou en PA, voire en PBT, se présentant soit sous la forme d'un siège (parfois appelé piston) dans le cas des valves femelles, soit sous la forme d'un gicleur (plus connu sous le terme de stem) dans le cas des valves mâles ;
  • un ressort en acier inoxydable ;
  • un tube plongeur en polyéthylène (PE).
Valves for aerosol dispensers on the market are assembled from a number of components involving different materials:
  • a cup made of aluminum or tinplate, coated with a varnish or not, or even a cup made of polymer material;
  • an external elastomer seal;
  • a one-piece valve body made of polyoxymethylene (POM), polyamide (PA), polyethylene (PE) or polypropylene (PP), or even poly(butylene terephthalate) (PBT);
  • an internal seal made of elastomer (frequently from a chemical family different from that of the external seal);
  • a POM or PA, or even PBT valve, either in the form of a seat (sometimes called a piston) in the case of female valves, or in the form of a nozzle (better known as a stem ) in the case of male valves;
  • a stainless steel spring;
  • a polyethylene (PE) dip tube.

Le procédé d'assemblage est complexe et associe plusieurs opérations successives, impliquant la création de sous-ensembles et nécessitant des tests de contrôle en ligne pour garantir l'étanchéité de la valve assemblée.The assembly process is complex and combines several successive operations, involving the creation of sub-assemblies and requiring on-line control tests to guarantee the tightness of the assembled valve.

Une des dernières phases de l'assemblage est l'opération de sertissage qui consiste à rapporter et à fixer de façon étanche le sous-ensemble constitué du corps de valve monobloc + stem ou siège + ressort + joint interne sur le sous-ensemble coupelle + joint externe.One of the last phases of the assembly is the crimping operation which consists of fitting and sealing the sub-assembly consisting of the one-piece valve body + stem or seat + spring + internal gasket on the cup sub-assembly + outer seal.

Cette phase est critique pour les performances de la valve en termes :

  • d'étanchéité ;
  • de hauteur de stem (montage du diffuseur) ;
  • de force d'actionnement de la valve ;
  • de fermeture de la valve.
This phase is critical for valve performance in terms of:
  • sealing;
  • stem height (diffuser mounting);
  • valve actuation force;
  • closing the valve.

L'ajustement des cotes de sertissage (diamètre et hauteur) est empirique et reste subjectif :

  • les valeurs nominales retenues ainsi que les intervalles de tolérance ont été établis empiriquement ;
  • les cotes peuvent varier en fonction de l'usure des pinces de sertissage.
The adjustment of crimping dimensions (diameter and height) is empirical and remains subjective:
  • the nominal values retained as well as the tolerance intervals have been established empirically;
  • the dimensions may vary depending on the wear of the crimping pliers.

Lors de l'assemblage, le stem est placé dans le corps de valve, qui lui-même est placé sous la coupelle, de sorte que le stem passe à travers une ouverture centrale de la coupelle en saillant au-dessus de la face extérieure de la coupelle. Le corps de valve est fixé à la coupelle par dudgeonnage de la coupelle sur la face extérieure du corps de valve. La coupelle est elle-même fixée au boîtier du générateur d'aérosol par sertissage ou dudgeonnage.During assembly, the stem is placed in the valve body, which itself is placed under the cup, so that the stem passes through a central opening of the cup projecting above the outer face of the cup. The valve body is fixed to the cup by expanding the cup on the exterior face of the valve body. The cup is itself attached to the housing of the aerosol generator by crimping or expansion.

Dans le cadre du développement de générateurs d'aérosol en matière plastique, il est fait de plus en plus souvent appel à des coupelles en matériau polymère. Dans ce cas, il est courant soit d'encliqueter par le dessous un corps de valve qui est fermé dans sa partie extérieure par la coupelle, soit de former le corps de valve directement dans la coupelle et de fermer la partie extérieure du corps de valve par une pièce rapportée placée par le haut sur l'ouverture du corps de valve et qui est fixée par encliquetage ou par soudage sur la coupelle. Du document FR 2 039 928 A5 on connait un corps de valve selon le préambule de la revendication 1. Les documents WO 2007/107174 A1 et FR 1 564 337 A présentent chacun une valve dans laquelle le corps de valve est encliqueté dans une coupelle. Le document US 2009/078903 A1 présente une valve gros débit avec un élément élastique placé à l'extérieur du récipient.In the context of the development of aerosol generators made of plastic material, use is made more and more often of cups made of polymer material. In this case, it is common practice either to snap a valve body from below which is closed in its outer part by the cup, or to form the valve body directly in the cup and close the outer part of the valve body. by an added part placed from above on the opening of the valve body and which is fixed by snap-fastening or by welding on the cup. Of the document FR 2 039 928 A5 a valve body is known according to the preamble of claim 1. The documents WO 2007/107174 A1 And FR 1 564 337 A each have a valve in which the valve body is snapped into a cup. The document US 2009/078903 A1 has a high flow valve with an elastic element placed outside the container.

L'invention a pour objectif de proposer un corps de valve et une valve faciles à fabriquer et à assembler qui puissent être utilisés aussi bien avec des coupelles métalliques du commerce qu'avec des coupelles en matériau polymère.The object of the invention is to propose a valve body and a valve which are easy to manufacture and to assemble and which can be used both with commercial metal cups and with cups made of polymer material.

Cet objectif est atteint avec un corps de valve selon la revendication 1.This object is achieved with a valve body according to claim 1.

Avec un tel corps de valve, il est possible de renoncer au dudgeonnage de la coupelle sur le corps de valve ce qui diminue considérablement les variations de côtes en supprimant le problème lié à l'usure des pinces de sertissage.With such a valve body, it is possible to dispense with expanding the cup on the valve body, which considerably reduces the variations in dimensions by eliminating the problem associated with wear of the crimping pliers.

L'orifice d'une des deux parois de fermeture est de préférence dimensionné pour laisser passer une tige de sortie du produit contenu dans le générateur d'aérosol, tige portée par une soupape à insérer au moins en partie dans le corps de valve (donc par un stem) ou par un diffuseur destiné à actionner la valve, l'orifice de l'autre des deux parois de fermeture étant dimensionné pour laisser entrer dans le corps de valve le produit contenu dans le générateur d'aérosol. Un tenon de fixation peut être prévu autour de l'orifice destiné à laisser entrer le produit dans le corps de valve, sur la face externe de la paroi de fermeture correspondante en vue de fixer au corps de valve un tube plongeur, un dispositif anti-affaissement ou tout autre dispositif similaire.The orifice of one of the two closure walls is preferably sized to allow an outlet rod for the product contained in the aerosol generator to pass, a rod carried by a valve to be inserted at least partly into the valve body (therefore by a stem) or by a diffuser intended to actuate the valve, the orifice of the other of the two closure walls being sized to allow the product contained in the aerosol generator to enter the valve body. A fixing stud may be provided around the orifice intended to let the product enter the valve body, on the external face of the corresponding closing wall in order to fix to the valve body a dip tube, an anti- sag or other similar device.

Il est préférable de muni une première des deux pièces du corps de valve d'une première paroi tubulaire fermée à l'une de ses extrémités par une première des deux parois de fermeture, une première paroi d'appui étant formée sur la face externe de la première paroi tubulaire. La face de la première paroi d'appui opposée à la première paroi de fermeture constitue la première des deux surfaces d'appui. De plus, il est préférable de munir la seconde des deux pièces du corps de valve de la seconde des deux parois de fermeture et, le cas échéant (autrement dit, si la totalité du corps tubulaire n'est pas placée sur l'autre pièce), d'une seconde paroi tubulaire fermée à l'une de ses extrémités par ladite seconde paroi de fermeture. Une seconde paroi d'appui est formée à la périphérie de la seconde paroi de fermeture ou sur la face externe de la seconde paroi tubulaire. La face de la seconde paroi d'appui opposée à la face externe de la seconde paroi de fermeture constitue la seconde des deux surfaces d'appui.It is preferable to provide a first of the two parts of the valve body with a first tubular wall closed at one of its ends by a first of the two closing walls, a first support wall being formed on the external face of the first tubular wall. The face of the first bearing wall opposite the first closing wall constitutes the first of the two bearing surfaces. Furthermore, it is preferable to provide the second of the two parts of the valve body with the second of the two closing walls and, if necessary (in other words, if the whole of the tubular body is not placed on the other part ), a second tubular wall closed at one of its ends by said second closing wall. A second support wall is formed at the periphery of the second closure wall or on the external face of the second tubular wall. The face of the second support wall opposite the outer face of the second closing wall constitutes the second of the two support surfaces.

Il est préférable que les moyens de fixation de la première pièce soient constitués par une première surface de fixation formée sur la surface externe de la première paroi tubulaire à l'intérieur d'une projection, par rapport à l'axe principal, de la première surface d'appui. Dans une variante de réalisation, ladite première surface de fixation est formée sur l'arête de la première paroi tubulaire opposée à la première paroi de fermeture.It is preferable that the means for fixing the first part consist of a first fixing surface formed on the external surface of the first tubular wall inside a projection, with respect to the main axis, of the first bearing surface. In a variant embodiment, said first fixing surface is formed on the edge of the first tubular wall opposite the first closure wall.

De même, les moyens de fixation de la seconde pièce peuvent être constitués par une seconde surface de fixation formée à la périphérie de la seconde paroi de fermeture à l'intérieur d'une projection, par rapport à l'axe principal, de la seconde surface d'appui. Dans une variante de réalisation, la seconde surface de fixation est formée sur la seconde paroi tubulaire, de préférence sur l'arête de la seconde paroi tubulaire opposée à la seconde paroi de fermeture.Likewise, the means for fixing the second part can be constituted by a second fixing surface formed on the periphery of the second closing wall inside a projection, with respect to the main axis, of the second bearing surface. In a variant embodiment, the second fixing surface is formed on the second tubular wall, preferably on the edge of the second tubular wall opposite the second closure wall.

Les deux surfaces de fixation sont de préférence de formes superposables, l'une des deux surfaces de fixation pouvant être munie d'une surépaisseur de soudage.The two fixing surfaces are preferably of superimposable shapes, one of the two fixing surfaces being able to be provided with a welding allowance.

Cette solution est particulièrement bien adaptée à une fixation par soudage ou par collage, notamment par soudage par ultrason.This solution is particularly well suited to fixing by welding or by gluing, in particular by ultrasonic welding.

Dans une variante de réalisation de l'invention, la première paroi tubulaire est dimensionnée pour former le corps tubulaire du corps de valve, de sorte qu'à l'état assemblé de la valve, l'extrémité de la première paroi tubulaire opposée à la première paroi de fermeture est en contact avec la seconde paroi de fermeture de l'autre pièce, de préférence avec interposition d'un joint d'étanchéité.In a variant embodiment of the invention, the first tubular wall is sized to form the tubular body of the valve body, so that in the assembled state of the valve, the end of the first tubular wall opposite the first closing wall is in contact with the second closing wall of the other part, preferably with the interposition of a seal.

Dans un développement de cette variante de réalisation, la première surface de fixation est formée sur l'arête de la première paroi tubulaire opposée à la première paroi de fermeture, et la seconde surface de fixation est formée sur la seconde paroi de fermeture, la seconde surface d'appui étant formée sur la périphérie de la seconde paroi de fermeture, la seconde pièce n'ayant pas de seconde paroi tubulaire.In a development of this variant embodiment, the first attachment surface is formed on the edge of the first tubular wall opposite the first closure wall, and the second attachment surface is formed on the second closure wall, the second bearing surface being formed on the periphery of the second closure wall, the second part having no second tubular wall.

Dans un autre développement de cette variante de réalisation, la première surface de fixation est formée sur la face externe de la première paroi tubulaire, de préférence sur la première paroi d'appui, de façon privilégiée dans une gorge formée sur la première paroi d'appui à l'intérieur de la première surface d'appui, et la seconde surface de fixation est formée sur l'arête de la seconde paroi tubulaire, la seconde surface d'appui étant formée sur la périphérie de la seconde paroi de fermeture ou sur la face externe de la seconde paroi tubulaire.In another development of this variant embodiment, the first fixing surface is formed on the outer face of the first tubular wall, preferably on the first bearing wall, preferably in a groove formed on the first wall of bearing inside the first bearing surface, and the second fixing surface is formed on the edge of the second tubular wall, the second bearing surface being formed on the periphery of the second closure wall or on the outer face of the second tubular wall.

Dans une autre variante de réalisation de l'invention, la première paroi tubulaire et la seconde paroi tubulaire ont des sections transversales superposables et constituent ensemble, à l'état assemblé de la valve, le corps tubulaire du corps de valve. Dans ce cas, la première surface de fixation est constituée par l'arête de la première paroi tubulaire opposée à la première paroi de fermeture et la seconde surface de fixation est constituée par l'arête de la seconde paroi tubulaire opposée à la seconde paroi de fermeture.In another alternative embodiment of the invention, the first tubular wall and the second tubular wall have superimposable cross-sections and together constitute, in the assembled state of the valve, the tubular body of the valve body. In this case, the first fixing surface is constituted by the edge of the first tubular wall opposite the first closing wall and the second fixing surface is constituted by the edge of the second tubular wall opposite the second wall of closing.

Pour garantir l'étanchéité à moindre coût à l'interface entre le corps de valve et la soupape (stem ou siège), il est préférable de prévoir un joint de soupape contre la face interne de la paroi de fermeture munie de l'orifice dimensionné pour laisser passer la tige de sortie du produit située sur la soupape ou sur un diffuseur. Ce joint de soupape est alors dimensionné pour assurer l'étanchéité entre une soupape placée dans le corps de valve et la face interne de ladite paroi de fermeture ainsi qu'entre la tige de sortie du produit (du stem ou du diffuseur) et l'orifice de la paroi de fermeture. Il est préférable que le joint de soupape soit surmoulé.To guarantee tightness at a lower cost at the interface between the valve body and the valve (stem or seat), it is preferable to provide a valve seal against the internal face of the closure wall provided with the dimensioned orifice to allow the product outlet stem located on the valve or on a diffuser to pass. This valve gasket is then sized to ensure the seal between a valve placed in the valve body and the internal face of said closure wall as well as between the product outlet rod (from the stem or from the diffuser) and the hole in the closing wall. It is preferable that the valve gasket be overmolded.

L'invention concerne également une valve pour générateur d'aérosol, comprenant

  • une coupelle munie d'une ouverture et adaptée à être fixée par son bord périphérique à un boîtier d'aérosol,
  • un corps de valve selon l'invention, et
  • une soupape logée au moins en partie dans le corps de valve.
Conformément à l'invention, l'une des deux pièces est située d'un côté de la coupelle et l'autre des deux pièces est située de l'autre côté de la coupelle. Les deux pièces sont fixées l'une à l'autre par leurs moyens de fixation en enserrant entre leur surface d'appui respective une partie annulaire de la coupelle située autour de l'ouverture. La formation de la valve est réalisée de préférence sans fixation de l'une des pièces sur la coupelle et/ou sur le boîtier.The invention also relates to a valve for an aerosol generator, comprising
  • a cup provided with an opening and adapted to be fixed by its peripheral edge to an aerosol container,
  • a valve body according to the invention, and
  • a valve housed at least partly in the valve body.
According to the invention, one of the two parts is located on one side of the cup and the other of the two parts is located on the other side of the cup. The two parts are fixed to one another by their fixing means by enclosing between their respective bearing surface an annular part of the cup located around the opening. The formation of the valve is preferably carried out without fixing one of the parts to the cup and/or to the housing.

Pour assurer l'étanchéité entre la coupelle et le corps de valve, il est préférable d'interposer un joint de coupelle entre la coupelle et l'une des parois d'appui. La surface d'appui en contact avec le joint de coupelle est de préférence munie d'une nervure d'étanchéité destinée à s'écraser contre le joint de coupelle à l'état assemblé de la valve. Le joint de coupelle peut être dimensionné pour assurer également l'étanchéité au niveau d'une interface entre les deux pièces du corps de valve. Le joint de coupelle peut être un composant distinct, auquel cas il est préférable que la paroi d'appui considérée soit munie d'une nervure d'étanchéité destinée à s'écraser contre le joint de coupelle à l'état assemblé de la valve. Il est également possible de surmouler le joint de coupelle sur la coupelle ou sur la paroi d'appui de l'une des pièces du corps de valve.To ensure sealing between the cup and the valve body, it is preferable to interpose a cup seal between the cup and one of the bearing walls. The bearing surface in contact with the cup seal is preferably provided with a sealing rib intended to be crushed against the cup seal in the assembled state of the valve. The cup gasket can be sized to also provide sealing at an interface between the two parts of the valve body. The cup seal may be a separate component, in which case it is preferable that the bearing wall considered be provided with a sealing rib intended to be crushed against the cup seal in the assembled state of the valve. He It is also possible to overmold the cup seal on the cup or on the bearing wall of one of the parts of the valve body.

Afin d'assurer une bonne retenue de la coupelle entre les deux parois d'appui, il est préférable de déformer le bord de l'ouverture de la coupelle vers l'une des faces de la coupelle pour former un col annulaire, de préférence en formant une arrête annulaire plane, l'arête du col étant en appui contre l'une des parois d'appui à l'état assemblé de la valve, de préférence contre la paroi d'appui contre laquelle n'est pas interposé le joint de coupelle.In order to ensure good retention of the cup between the two support walls, it is preferable to deform the edge of the opening of the cup towards one of the faces of the cup to form an annular neck, preferably by forming a flat annular edge, the edge of the neck resting against one of the bearing walls in the assembled state of the valve, preferably against the bearing wall against which the gasket is not interposed. cup.

Dans un mode de réalisation privilégié de l'invention, les deux pièces sont fixées l'une à l'autre en enserrant la coupelle entre elles par fixation irréversible de leurs surfaces de fixation l'une sur l'autre. Cette fixation est réalisée de préférence par soudage éventuellement à l'aide d'une surépaisseur de soudage prévue sur l'une des surfaces de fixation, en particulier par soudage à ultrason.In a preferred embodiment of the invention, the two parts are fixed to each other by enclosing the cup between them by irreversible fixing of their fixing surfaces to each other. This fixing is preferably carried out by welding, possibly using a welding allowance provided on one of the fixing surfaces, in particular by ultrasonic welding.

L'invention est décrite plus en détail ci-dessous à l'aide des figures qui montrent :

Figure 1
une vue éclatée en coupe d'une valve selon un premier mode de réalisation de l'invention ;
Figure 2
une vue en coupe de face de la valve de la figure 1 ;
Figure 3
une vue en perspective et en coupe de la pièce extérieure du corps de valve de la valve de la figure 1 ;
Figure 4
une vue en perspective et en coupe de la pièce intérieure du corps de valve de la valve de la figure 1 ;
Figure 5
une vue en perspective et en coupe du stem de la valve de la figure 1 ;
Figure 6
une vue en perspective et en coupe de la coupelle de la valve de la figure 1 avec surmoulés dessus (a) un joint de boîtier et (b) un joint de boîtier et un joint de coupelle ;
Figure 7
une vue en coupe de face d'une valve selon un second mode de réalisation de l'invention.
The invention is described in more detail below using the figures which show:
Figure 1
an exploded sectional view of a valve according to a first embodiment of the invention;
Figure 2
a front sectional view of the valve of the figure 1 ;
Figure 3
a perspective and cross-sectional view of the outer part of the valve body of the valve of the figure 1 ;
Figure 4
a perspective and cross-sectional view of the inner part of the valve body of the valve of the figure 1 ;
Figure 5
a perspective and cross-sectional view of the stem of the valve of the figure 1 ;
Figure 6
a perspective and cross-sectional view of the valve cup of the figure 1 with molded thereon (a) a housing gasket and (b) a housing gasket and a cup gasket;
Picture 7
a front sectional view of a valve according to a second embodiment of the invention.

Le corps de valve et plus généralement la valve de l'invention peuvent être utilisés dans toutes les positions. Dans les figures illustrant cette demande, la valve est représentée avec le stem dirigé vers le haut. Les références « haut » / « bas » ou « supérieur » / « inférieur » n'ont qu'une valeur relative en rapport avec les représentations des figures ci-jointes. Il va de soi que la valve peut être utilisée dans toutes les positions et que ce qui est en haut dans la position représentée ici ne le sera pas nécessairement lors de l'utilisation. Par ailleurs, la valve s'étend longitudinalement par rapport à un axe principal (A), vertical dans les représentations des figures ci-jointes. Les termes « radial », « axial » et « transversal » se rapportent à cet axe principal (A).The valve body and more generally the valve of the invention can be used in all positions. In the figures illustrating this application, the valve is shown with the stem pointing upwards. The references "top" / "bottom" or "upper" / "lower" have only a relative value in relation to the representations of the attached figures. It goes without saying that the valve can be used in all positions and that what is up in the position shown here will not necessarily be up in use. Furthermore, the valve extends longitudinally with respect to a main axis (A), vertical in the representations of the attached figures. The terms "radial", "axial" and "transverse" refer to this main axis (A).

Comme pour toute valve à coupelle, cette dernière constitue une séparation entre le côté de la valve destiné à être placé à l'intérieur du boîtier et l'autre côté destiné à être à l'extérieur du boîtier. Les termes « intérieur » et « extérieur » se rapportent aux éléments situés du côté intérieur ou extérieur de la coupelle. Les termes « interne » et « externe » se rapportent à un composant particulier (pièce extérieure ou pièce intérieure) et définissent ce qui se trouve dans ou hors dudit composant, peu importe qu'il s'agisse d'un composant situé sur la face intérieure ou extérieure de la coupelle.As with any cup valve, the latter constitutes a separation between the side of the valve intended to be placed inside the housing and the other side intended to be outside the housing. The terms “inner” and “outer” refer to elements located on the inner or outer side of the cup. The terms "internal" and "external" refer to a particular component (exterior part or interior part) and define what is inside or outside of said component, regardless of whether it is a component located on the face interior or exterior of the cup.

L'exemple présenté ici est une valve de type mâle avec comme soupape un stem dont une partie de la tige saille hors de la valve. L'invention peut s'appliquer également à une valve de type femelle avec comme soupape un siège situé dans le corps de valve et devant être actionné par une tige extérieure (généralement celle d'un diffuseur) pénétrant dans la valve. La valve de l'invention telle que présentée ici se compose d'un corps de valve en deux pièces (20, 30) dans lequel est retenu un stem (40) dont l'une des extrémités (411) saille du corps de valve. Le corps de valve se compose d'une pièce extérieure (20) et d'une pièce intérieure (30). En position assemblée, les deux pièces (20, 30) du corps de valve bloquent entre elles la coupelle (10) avec de préférence interposition d'un joint de coupelle (71).The example presented here is a male-type valve with a stem as a valve, part of the stem of which protrudes from the valve. The invention can also be applied to a valve of the female type with, as a valve, a seat located in the valve body and to be actuated by an external rod (generally that of a diffuser) penetrating into the valve. The valve of the invention as presented here consists of a two-piece valve body (20, 30) in which is retained a stem (40), one end (411) of which projects from the valve body. The valve body consists of an outer part (20) and an inner part (30). In the assembled position, the two parts (20, 30) of the valve body block the cup (10) between them, preferably with the interposition of a cup seal (71).

La pièce intérieure (30) du corps de valve a une forme essentiellement tubulaire autour de l'axe (A), ici une forme cylindrique. Elle est constituée d'une première paroi cylindrique (31) partiellement fermée d'un côté (côté inférieur) par une première paroi de fermeture (32) de préférence plane et radiale. Un premier orifice (33) est réalisé au centre de la première paroi de fermeture (32), orifice par lequel pénètre le produit à extraire. Une première paroi d'appui (34) annulaire est placée sur la face externe de la première paroi cylindrique (31), laquelle première paroi d'appui (34) est symétrique par rapport à l'axe (A) et fait le tour complet de la première paroi cylindrique. Le bord périphérique de sa face supérieure, face dirigée vers la coupelle, constitue une première surface d'appui (341) annulaire pour la coupelle. Dans le présent exemple, la première paroi d'appui (34) est située à distance de la première paroi de fermeture (32) et la première surface d'appui (341) est radiale. Une nervure d'étanchéité (342) annulaire peut être réalisée sur la première surface d'appui (341). Cette nervure d'étanchéité (342) sert à améliorer l'étanchéité entre un joint de coupelle (71) et la pièce intérieure (30) du corps de valve. Plus au centre que la première surface d'appui (341), la face supérieure de la première paroi d'appui (34) présente une gorge. Le fond de la gorge constitue une première surface de fixation (35) pour le soudage des deux pièces (20, 30) du corps de valve. Une surépaisseur de matière (351) peut également être prévue sur la première surface de fixation (35) pour servir de directeur d'énergie lors du soudage par ultrason des deux pièces (20, 30) du corps de valve. On voit donc que la première surface de fixation (35) se trouve à l'intérieur d'une projection selon l'axe principal (A) de la première surface d'appui (341). La première surface de fixation (35) pourrait cependant être dans le prolongement de la première surface d'appui (341), voire être décalée vers le haut. La face interne de la première paroi cylindrique (31) peut présenter, à proximité de la première surface de fermeture (32), des épaulements de guidage (311) servant de logement au ressort (50). Dans l'exemple représenté ici, il y a trois épaulements répartis régulièrement et de façon symétrique par rapport à l'axe principal (A). Si le gaz propulseur doit être également prélevé, on peut prévoir un ou plusieurs canaux (312) dans la première paroi cylindrique (31), entre la première paroi de fermeture (32) et la première paroi d'appui (34), pour mettre en contact la face interne et la face externe de la première paroi cylindrique (31). Un tenon (321) peut être placé sur la face externe de la première paroi de fermeture (32), autour du premier orifice (33), pour permettre la fixation d'un tube plongeur (60), d'un dispositif anti-affaissement de poche ou tout autre dispositif similaire.The inner part (30) of the valve body has an essentially tubular shape around the axis (A), here a cylindrical shape. It consists of a first cylindrical wall (31) partially closed on one side (lower side) by a first closing wall (32) which is preferably planar and radial. A first orifice (33) is made in the center of the first closure wall (32), through which the product to be extracted penetrates. A first bearing wall (34) annular is placed on the outer face of the first cylindrical wall (31), which first bearing wall (34) is symmetrical with respect to the axis (A) and makes the complete turn of the first cylindrical wall. The peripheral edge of its upper face, face facing the cup, constitutes a first bearing surface (341) annular for the cup. In the present example, the first support wall (34) is located at a distance from the first closure wall (32) and the first support surface (341) is radial. An annular sealing rib (342) may be formed on the first surface support (341). This sealing rib (342) serves to improve the seal between a cup seal (71) and the interior part (30) of the valve body. More centrally than the first bearing surface (341), the upper face of the first bearing wall (34) has a groove. The bottom of the groove constitutes a first fixing surface (35) for welding the two parts (20, 30) of the valve body. An extra thickness of material (351) can also be provided on the first fixing surface (35) to serve as an energy director during the ultrasonic welding of the two parts (20, 30) of the valve body. It can therefore be seen that the first fixing surface (35) is located inside a projection along the main axis (A) of the first bearing surface (341). The first fixing surface (35) could however be in the extension of the first bearing surface (341), or even be offset upwards. The internal face of the first cylindrical wall (31) may have, close to the first closing surface (32), guide shoulders (311) serving as a housing for the spring (50). In the example represented here, there are three shoulders distributed regularly and symmetrically with respect to the main axis (A). If the propellant gas must also be taken off, one or more channels (312) can be provided in the first cylindrical wall (31), between the first closing wall (32) and the first support wall (34), to in contact the internal face and the external face of the first cylindrical wall (31). A tenon (321) can be placed on the external face of the first closure wall (32), around the first orifice (33), to allow the attachment of a dip tube (60), an anti-sagging device handheld or other similar device.

La pièce extérieure (20) du corps de valve a également une forme essentiellement tubulaire autour de l'axe (A), ici une forme cylindrique. Elle est constituée d'une seconde paroi cylindrique (21) ouverte d'un côté (côté inférieur) et partiellement fermée du côté opposé (côté supérieur) par une seconde paroi de fermeture (22) de préférence plane et radiale. L'arête de la seconde paroi cylindrique (21) opposée à la seconde paroi de fermeture (22) constitue une seconde surface de fixation (25) pour le soudage des deux pièces (20, 30) du corps de valve. Le contour transversal de cette seconde surface de fixation (25) est identique au contour transversal de la première surface de fixation (35) de la pièce intérieure, de sorte que les deux contours transversaux sont superposables. Un second orifice (23) est réalisé au centre de la seconde paroi de fermeture (22), orifice par lequel passe la tige du stem à l'état assemblé de la valve. Une seconde paroi d'appui (24) annulaire est placée sur la face externe de la seconde paroi cylindrique (21), laquelle seconde paroi d'appui (24) est symétrique par rapport à l'axe (A) et fait le tour complet de la paroi cylindrique. Sa face inférieure, dirigée vers la coupelle, constitue une seconde surface d'appui (241) pour la coupelle. Dans le présent exemple, la seconde paroi d'appui (24) est placée à distance de la seconde surface de fixation (25) et de la seconde paroi de fermeture (22), et la seconde surface d'appui (241) est radiale. La face interne de la seconde paroi cylindrique (21) peut être munie de moyens de retenue pour maintenir un joint de soupape (72), lorsque celui-ci est non surmoulé, notamment lors du montage de la valve. Ces moyens de retenue peuvent être constitués par le rebord d'une cavité réalisée dans la face interne de la seconde paroi cylindrique (21) à proximité de la seconde paroi de fermeture (22). Au niveau de cette cavité, la face interne de la seconde paroi cylindrique présente une section transversale plus importante que dans le reste de la seconde paroi cylindrique. Une autre solution consiste à réaliser une nervure périphérique radiale ou une série de saillies derrière laquelle/lesquelles le joint de soupape (72) peut se placer et être maintenu en contact avec la seconde paroi de fermeture (22). Pour améliorer l'étanchéité du joint de soupape (72), une nervure d'étanchéité (221) annulaire peut être placée sur la face interne de la seconde paroi de fermeture (22), autour du second orifice (23), nervure d'étanchéité qui vient s'appuyer sur le joint de soupape (72).The outer part (20) of the valve body also has an essentially tubular shape around the axis (A), here a cylindrical shape. It consists of a second cylindrical wall (21) open on one side (lower side) and partially closed on the opposite side (upper side) by a second closing wall (22) which is preferably planar and radial. The edge of the second cylindrical wall (21) opposite the second closure wall (22) constitutes a second fixing surface (25) for welding the two parts (20, 30) of the valve body. The transverse contour of this second attachment surface (25) is identical to the transverse contour of the first attachment surface (35) of the interior part, so that the two transverse contours are superimposable. A second orifice (23) is made in the center of the second closure wall (22), through which the stem of the stem passes in the assembled state of the valve. A second annular bearing wall (24) is placed on the external face of the second cylindrical wall (21), which second bearing wall (24) is symmetrical with respect to the axis (A) and makes the complete turn of the cylindrical wall. Its underside, directed towards the cup, constitutes a second bearing surface (241) for the cup. In the present example, the second support wall (24) is placed at a distance from the second fixing surface (25) and the second closure wall (22), and the second support surface (241) is radial. The internal face of the second cylindrical wall (21) can be provided with retaining means to hold a valve seal (72), when the latter is not overmoulded, in particular during assembly of the valve. These retaining means may be constituted by the edge of a cavity made in the internal face of the second cylindrical wall (21) close to the second closing wall (22). At this cavity, the inner face of the second cylindrical wall has a larger cross section than in the rest of the second cylindrical wall. Another solution consists in providing a radial peripheral rib or a series of projections behind which the valve seal (72) can be placed and maintained in contact with the second closing wall (22). To improve the tightness of the valve seal (72), an annular sealing rib (221) can be placed on the internal face of the second closure wall (22), around the second orifice (23), rib of sealing which rests on the valve seal (72).

Dans l'exemple présenté ici, la première paroi cylindrique (31) de la pièce intérieure (30) est dimensionnée pour pouvoir pénétrer dans la seconde paroi cylindrique (21) de la pièce extérieure (20). Autrement dit, le diamètre externe de la première paroi cylindrique (31) est inférieur au diamètre interne de la seconde paroi cylindrique (21). De plus, la hauteur de cette première paroi cylindrique (31) est choisie de telle sorte que son arête (313) opposée à la première paroi de fermeture (32) vient en appui étanche contre le joint de soupape (72) placé contre la seconde paroi de fermeture (22) lorsque la valve est à l'état assemblé.In the example presented here, the first cylindrical wall (31) of the inner part (30) is sized to be able to penetrate into the second cylindrical wall (21) of the outer part (20). In other words, the outer diameter of the first cylindrical wall (31) is smaller than the inner diameter of the second cylindrical wall (21). In addition, the height of this first cylindrical wall (31) is chosen such that its edge (313) opposite to the first closing wall (32) comes into sealing contact against the valve seal (72) placed against the second closing wall (22) when the valve is in the assembled state.

Par ailleurs, en plaçant sur la pièce intérieure (30) la première surface de fixation (35) dans une gorge en retrait de la première surface d'appui (341), on crée un effet de guidage et de centrage de la seconde surface de fixation (25) par rapport à la première surface de fixation (35) lors de l'assemblage de la valve. Cela contribue à faciliter l'assemblage.Furthermore, by placing the first fixing surface (35) on the inner part (30) in a groove set back from the first bearing surface (341), a guiding and centering effect of the second surface of the attachment (25) relative to the first attachment surface (35) when assembling the valve. This helps to facilitate assembly.

Le stem (40) est un stem traditionnel. Il se compose d'une paroi cylindrique (41) ouverte à son extrémité supérieure (411) et fermée à son extrémité inférieure en formant un canal de sortie du produit. Un ou plusieurs orifices (412) placés en bas du canal de sortie traversent radialement la paroi cylindrique pour mettre en contact la face interne et la face externe de ladite paroi cylindrique (41). La paroi cylindrique (41) constitue la tige de sortie du produit. Cette paroi cylindrique se poursuit par une couronne (42) de plus grand diamètre présentant sur sa face externe des canaux verticaux ou des nervures verticales permettant au produit de contourner la couronne. L'enveloppe extérieure de cette couronne a un diamètre légèrement inférieur au diamètre interne de la paroi cylindrique principale (31) de la pièce intérieure de sorte qu'elle peut entrer dans celle-ci tout en étant guidée. Sur sa face annulaire supérieure, la couronne (42) est munie d'une nervure d'étanchéité (421) pour assurer l'étanchéité avec le joint de soupape (72). La couronne se poursuit vers le bas par un tenon de guidage (43) destiné à coopérer avec le ressort (50).The stem (40) is a traditional stem. It consists of a cylindrical wall (41) open at its upper end (411) and closed at its lower end, forming a product outlet channel. One or more orifices (412) placed at the bottom of the outlet channel pass radially through the cylindrical wall to bring the internal face and the external face of said cylindrical wall (41) into contact. The cylindrical wall (41) constitutes the outlet rod of the product. This cylindrical wall is continued by a crown (42) of larger diameter having on its external face vertical channels or vertical ribs allowing the proceeds to bypass the crown. The outer casing of this crown has a diameter slightly smaller than the inner diameter of the main cylindrical wall (31) of the inner part so that it can enter the latter while being guided. On its upper annular face, the crown (42) is provided with a sealing rib (421) to seal with the valve gasket (72). The crown is continued downwards by a guide pin (43) intended to cooperate with the spring (50).

La coupelle (10) peut être une coupelle classique. Généralement, elle est formée d'une paroi (11) munie d'une ouverture centrale (12) et d'un rebord périphérique (13) destiné à sa fixation à un boîtier. Un joint de boîtier (73) est placé sur la face intérieure du rebord périphérique pour assurer l'étanchéité entre la coupelle et le boîtier. Le joint de boîtier peut être un composant distinct ou, comme dans les exemples montrés ici, il peut être surmoulé sur la face intérieure de la coupelle. Dans l'exemple présenté ici, la paroi (11) est plane et radiale autour de l'ouverture (12) et se redresse vers le haut au niveau de l'ouverture de sorte à former un col (121). Ce col sert notamment à rigidifier la paroi au niveau de la partie plane et radiale. En direction du bord périphérique, au-delà de la partie plane et radiale, la paroi se redresse en formant un tronçon de paroi sensiblement cylindrique qui se termine par le rebord périphérique (13) de forme roulée. Le corps de valve de l'invention peut s'utiliser avec des coupelles de n'importe quelle forme. Un autre exemple de coupelle est représenté à la figure 7.The cup (10) can be a conventional cup. Generally, it is formed of a wall (11) provided with a central opening (12) and a peripheral rim (13) intended for its attachment to a casing. A housing seal (73) is placed on the inside face of the peripheral flange to provide a seal between the cup and the housing. The housing gasket can be a separate component or, as in the examples shown here, it can be overmolded to the inside face of the cup. In the example presented here, the wall (11) is flat and radial around the opening (12) and straightens upwards at the level of the opening so as to form a neck (121). This neck serves in particular to stiffen the wall at the level of the flat and radial part. In the direction of the peripheral edge, beyond the flat and radial part, the wall straightens out, forming a substantially cylindrical wall section which ends in the peripheral flange (13) of rolled shape. The valve body of the invention can be used with cups of any shape. Another example of a cup is shown in figure 7 .

Les joints (71, 72, 73) peuvent être des composants rapportés, mis en place lors de l'assemblage de la valve. Il est également possible qu'ils soient surmoulés. Par exemple, le joint de soupape (72) peut être surmoulé sur la face interne de la paroi de fermeture (22) de la pièce extérieure, tout en ménageant l'orifice (23). Le joint de coupelle (71) peut être surmoulé sur la face intérieure de la coupelle (1), comme cela est montré sur la figure 6b, ou sur l'une des surfaces d'appui (241, 341). Si le joint est surmoulé sur une surface d'appui, il est possible de renoncer à la nervure d'étanchéité (342). Le joint de boîtier (73) peut être surmoulé sur le rebord périphérique (13) de la coupelle.The seals (71, 72, 73) can be added components, put in place during assembly of the valve. It is also possible that they are overmolded. For example, the valve gasket (72) can be molded onto the inner face of the closing wall (22) of the outer part, while leaving the orifice (23). The cup seal (71) can be overmolded on the inside face of the cup (1), as shown in the figure 6b , or on one of the bearing surfaces (241, 341). If the seal is molded onto a bearing surface, it is possible to dispense with the sealing rib (342). The housing seal (73) can be molded onto the peripheral rim (13) of the cup.

La valve est obtenue de la façon suivante. Le joint de soupape (72) est placé dans le fond de la pièce extérieure (20), en appui contre la face interne de la seconde paroi de fermeture (22). Le stem (40) est ensuite introduit par son extrémité supérieure (411) dans le second orifice (23) de la pièce extérieure (20) de sorte que la couronne (42) se trouve en appui avec sa nervure d'étanchéité (421) contre le joint de soupape (72). Le ressort (50) est placé sur le tenon de guidage (43) du stem. La coupelle (10) est enfilée sur la pièce extérieure de sorte que le bord de son ouverture (12) entoure la partie de la face externe de la seconde paroi cylindrique (21) située en dessous de la seconde paroi d'appui (24), le col (121) en appui contre la seconde surface d'appui (241). Le joint de coupelle (71), s'il n'est pas surmoulé, est placé sur la coupelle. La pièce intérieure (30) est alors mise en place en introduisant la première paroi cylindrique (31) dans la seconde paroi cylindrique (21) de la pièce extérieure (20). Le ressort (50) prend alors place entre les épaulements (311) situés au fond de la pièce intérieure (30) et s'appuie contre la face interne de la première paroi de fermeture (32), repoussant ainsi le stem contre le joint de soupape (72). La seconde surface de fixation (25) située à l'extrémité libre de la seconde paroi cylindrique (21) de la pièce extérieure pénètre dans la gorge au fond de laquelle est réalisée la première surface de fixation (35). Les deux pièces (20, 30) du corps de valve sont alors soudées par exemple par ultrason, la surépaisseur (351) de matière servant de directeur d'énergie.The valve is obtained as follows. The valve seal (72) is placed in the bottom of the outer part (20), resting against the internal face of the second closing wall (22). The stem (40) is then introduced by its upper end (411) into the second orifice (23) of the outer part (20) so that the crown (42) is in contact with its sealing rib (421) against the valve seal (72). The spring (50) is placed on the guide pin (43) of the stem. The cup (10) is threaded onto the outer part so that the edge of its opening (12) surrounds the part of the external face of the second cylindrical wall (21) located below the second bearing wall (24), the neck (121) resting against the second bearing surface (241). The cup seal (71), if not overmolded, is placed on the cup. The inner part (30) is then put in place by introducing the first cylindrical wall (31) into the second cylindrical wall (21) of the outer part (20). The spring (50) then takes place between the shoulders (311) located at the bottom of the inner part (30) and presses against the internal face of the first closing wall (32), thus pushing the stem against the joint of valve (72). The second fixing surface (25) located at the free end of the second cylindrical wall (21) of the outer part penetrates into the groove at the bottom of which the first fixing surface (35) is made. The two parts (20, 30) of the valve body are then welded, for example by ultrasound, the extra thickness (351) of material serving as an energy director.

L'étanchéité entre les différentes pièces est assurée par différents moyens dont certains sont redondants. On citera par exemple :

  • le joint de soupape (72) qui assure l'étanchéité (i) avec la face interne de la seconde paroi de fermeture (22), et notamment avec la nervure d'étanchéité (221), (ii) avec le stem (40) qu'il entoure de façon étanche au niveau de la paroi cylindrique (41), la nervure d'étanchéité (421) de la couronne du stem étant en appui contre le joint de soupape, et (iii) avec la pièce intérieure (30) qui s'appuie dessus avec l'extrémité (313) de la première paroi cylindrique (31) ;
  • la soudure entre les deux pièces (20, 30) du corps de valve au niveau des surfaces de fixation (25, 35, 351) ;
  • le joint de coupelle (71) qui assure l'étanchéité (i) au niveau de la jonction entre les deux pièces (20, 30) du corps de valve, d'une part en entourant de façon étanche la partie de la seconde paroi cylindrique (21) de la pièce extérieure située entre la seconde paroi d'appui (24) et la seconde surface de fixation (25), et d'autre part en s'appuyant sur la nervure d'étanchéité (342) de la première surface d'appui (341) de la pièce intérieure (30), et (ii) au niveau de la coupelle (10) et du corps de valve (20, 30) en s'appuyant contre la face intérieure de la coupelle au niveau de la paroi (11) entourant l'ouverture (12) et le col (121).
Sealing between the different parts is ensured by different means, some of which are redundant. We can cite for example:
  • the valve seal (72) which provides sealing (i) with the internal face of the second closure wall (22), and in particular with the sealing rib (221), (ii) with the stem (40) that it surrounds in a sealed manner at the level of the cylindrical wall (41), the sealing rib (421) of the crown of the stem resting against the valve seal, and (iii) with the inner part (30) which rests on it with the end (313) of the first cylindrical wall (31);
  • the weld between the two parts (20, 30) of the valve body at the attachment surfaces (25, 35, 351);
  • the cup seal (71) which provides the seal (i) at the junction between the two parts (20, 30) of the valve body, on the one hand by sealingly surrounding the part of the second cylindrical wall (21) of the outer part located between the second bearing wall (24) and the second fixing surface (25), and on the other hand resting on the sealing rib (342) of the first surface support (341) of the inner part (30), and (ii) at the level of the cup (10) and of the valve body (20, 30) by pressing against the inner face of the cup at the level of the wall (11) surrounding the opening (12) and the neck (121).

On comprend que les deux surfaces d'appui (241, 341) sont orientées selon l'orientation de la coupelle au niveau de l'ouverture centrale (12). Ici, la paroi de la coupelle est plane et radiale autour de l'ouverture centrale et du col : les deux surfaces d'appui sont également planes et radiales. Si la paroi de la coupelle est inclinée autour de l'ouverture, les surfaces d'appui (241, 341) peuvent également être inclinées de façon semblable. Si la paroi de la coupelle est assez rigide, il est également possible de renoncer au col (121).It is understood that the two support surfaces (241, 341) are oriented according to the orientation of the cup at the level of the central opening (12). Here, the wall of the cup is flat and radial around the central opening and the neck: the two bearing surfaces are also flat and radial. If the wall of the cup is tilted around the opening, the bearing surfaces (241, 341) can also be similarly inclined. If the wall of the cup is quite rigid, it is also possible to dispense with the neck (121).

La valve présentée ici est une valve de type mâle. La soupape est constituée par un stem (40) dont une partie (41) de forme tubulaire traverse la paroi de fermeture extérieure (22) par le second orifice (23) et saille au-dehors de la valve. Cette partie tubulaire constitue une tige par laquelle sort le produit. Le corps de valve de l'invention peut également être utilisé pour former une valve de type femelle. Dans ce cas, le stem (40) est remplacé par un siège (parfois appelé aussi piston) qui coopère avec la tige d'un diffuseur, la tige du diffuseur pénétrant dans la valve par le second orifice (23) pour venir appuyer sur le siège et ouvrir la valve. Le second orifice (23) est donc toujours dimensionné pour laisser passer une tige, soit la propre tige du stem, soit celle du diffuseur, étrangère à la valve.The valve shown here is a male type valve. The valve consists of a stem (40) of which a tubular part (41) passes through the outer closure wall (22) via the second orifice (23) and protrudes outside the valve. This tubular part constitutes a rod through which the product exits. The valve body of the invention can also be used to form a female-type valve. In this case, the stem (40) is replaced by a seat (sometimes also called a piston) which cooperates with the stem of a diffuser, the stem of the diffuser entering the valve through the second orifice (23) to press on the seat and open the valve. The second orifice (23) is therefore always sized to allow a stem to pass, either the stem itself, or that of the diffuser, foreign to the valve.

La pièce intérieure (30) peut être munie d'une surface pour la soudure d'une poche et ainsi former une valve à poche.The inner part (30) can be provided with a surface for welding a pocket and thus form a pocket valve.

Comme le montrent les figures 3 et 4, les deux surfaces d'appui (241, 341) sont constituées par des surfaces continues. Il serait cependant envisageable que l'une au moins des deux surfaces d'appui soit discontinue et formée d'une succession de sections espacées les unes des autres et réparties sur toute la circonférence de la face externe de la pièce considérée. On peut même envisager que les deux surfaces d'appui soient discontinues. Dans ce cas, le joint de coupelle est de préférence surmoulé sur l'une ou l'autre des deux surfaces d'appui.As shown by the figures 3 and 4 , the two support surfaces (241, 341) consist of continuous surfaces. However, it would be possible for at least one of the two bearing surfaces to be discontinuous and formed of a succession of sections spaced from each other and distributed over the entire circumference of the outer face of the part in question. It is even possible to envisage the two bearing surfaces being discontinuous. In this case, the cup seal is preferably molded onto one or the other of the two bearing surfaces.

Le joint de coupelle pourrait être placé entre la pièce extérieure (20) et la coupelle (10), plutôt qu'entre la coupelle (10) et la pièce intérieure (30) comme cela est représenté sur les figures. On pourra dans ce cas réaliser le col (121) pour qu'il soit dirigé vers la première surface d'appui (341).The cup seal could be placed between the outer part (20) and the cup (10), rather than between the cup (10) and the inner part (30) as shown in the figures. In this case, the neck (121) can be made so that it is directed towards the first bearing surface (341).

Dans l'exemple présenté ici, l'espace dans lequel se trouve le stem est défini d'une part par la face interne de la première paroi de fermeture (32) et la première paroi cylindrique (31) de la pièce intérieure (30), et d'autre part par la face interne de la seconde paroi de fermeture (22) de la pièce extérieure associée au joint de soupape (72). Autrement dit, il y a un emboitement de la première paroi cylindrique (31) de la pièce intérieure dans la seconde paroi cylindrique (21) de la pièce extérieure de sorte que ces deux parties se chevauchent en partie.In the example presented here, the space in which the stem is located is defined on the one hand by the internal face of the first closing wall (32) and the first cylindrical wall (31) of the internal part (30) , and on the other hand by the inner face of the second closure wall (22) of the outer part associated with the valve seal (72). In other words, there is an interlocking of the first cylindrical wall (31) of the inner part in the second cylindrical wall (21) of the outer part so that these two parts partially overlap.

Il est cependant possible d'éviter ce chevauchement en raccourcissant la première paroi cylindrique (31) de la pièce intérieure de sorte que l'espace pour le stem (le corps cylindrique) est défini dans sa partie extérieure par la seconde paroi cylindrique (21) et la seconde paroi de fermeture (22) de la pièce extérieure, et dans sa partie intérieure par la première paroi cylindrique (31) raccourcie et la première paroi de fermeture (32) de la pièce intérieure. Dans ce cas, la seconde paroi cylindrique (21) de la pièce extérieure doit être redimensionnée pour que son diamètre interne soit identique à celui de la première paroi cylindrique (31) raccourcie de la pièce intérieure. Dans tous les cas, l'extrémité libre de la paroi cylindrique (21, 31) portant l'une des surfaces de fixation (25, 35) de l'une des pièces traverse l'ouverture centrale (12) de la coupelle pour entrer en contact avec la surface de fixation (25, 35) de l'autre pièce. Autrement dit, la paroi d'appui (24, 34) de l'une des deux pièces au moins se trouve à distance de la surface de fixation (25, 35) de ladite pièce. Dans une variante de réalisation, l'une des deux pièces, la pièce extérieure par exemple, n'a pas de paroi cylindrique (21) et la paroi d'appui (24) se trouve dans le prolongement de la paroi de fermeture (22), à la périphérie de celle-ci. La surface de fixation est également placée sur la paroi d'appui, radialement plus au centre que la première surface d'appui. Avec cette solution, le corps de valve est pratiquement entièrement enfermé dans le boîtier du générateur d'aérosol, seules la paroi de fermeture (21) avec la paroi d'appui (24) et l'extrémité libre du stem (41) dépassent au-dessus de la coupelle (1). Dans le cas où l'une des deux pièces est constituée uniquement par sa paroi de fermeture, on peut tout de même prévoir des moyens de centrage. Par exemple si le joint de soupape est surmoulé sur la face interne de la paroi de fermeture, le bord périphérique de ce joint de soupape peut jouer le rôle de moyens de centrage, d'autant plus qu'il n'a pas de fonction d'étanchéité avec la paroi tubulaire de l'autre pièce, puisque les deux sont soudées entre elles. Une autre solution consiste à prévoir un emboitement entre les deux pièces, par exemple en réalisant les surfaces de fixation pour qu'elles soient non pas radiales comme c'est le cas dans l'exemple présenté ici, mais tronconiques et de formes complémentaires.It is however possible to avoid this overlapping by shortening the first cylindrical wall (31) of the inner part so that the space for the stem (the cylindrical body) is defined in its outer part by the second cylindrical wall (21) and the second closing wall (22) of the outer part, and in its inner part by the first shortened cylindrical wall (31) and the first closing wall (32) of the inner part. In this case, the second cylindrical wall (21) of the outer part must be resized so that its internal diameter is identical to that of the shortened first cylindrical wall (31) of the inner part. In all cases, the free end of the cylindrical wall (21, 31) bearing one of the fixing surfaces (25, 35) of one of the parts passes through the central opening (12) of the cup to enter in contact with the fixing surface (25, 35) of the other part. In other words, the bearing wall (24, 34) of at least one of the two parts is located at a distance from the fixing surface (25, 35) of said part. In a variant embodiment, one of the two parts, the outer part for example, has no cylindrical wall (21) and the support wall (24) is located in the extension of the closing wall (22 ), at its periphery. The fixing surface is also placed on the bearing wall, radially more centrally than the first bearing surface. With this solution, the valve body is practically completely enclosed in the housing of the aerosol generator, only the closure wall (21) with the support wall (24) and the free end of the stem (41) protrude at the above the cup (1). In the case where one of the two parts is constituted solely by its closing wall, it is still possible to provide centering means. For example, if the valve seal is molded onto the inner face of the closure wall, the peripheral edge of this valve seal can play the role of centering means, especially since it has no function of sealing with the tubular wall of the other part, since the two are welded together. Another solution consists in providing interlocking between the two parts, for example by making the fixing surfaces so that they are not radial as is the case in the example presented here, but frustoconical and of complementary shapes.

Au lieu de souder les surfaces de fixation (25, 35) des deux pièces (20, 30) pour former le corps de valve en emprisonnant la coupelle (1) entre les deux surfaces d'appui (241, 341), il serait possible d'utiliser d'autres moyens de fixation, par exemple un encliquetage ou un collage.Instead of welding the fixing surfaces (25, 35) of the two parts (20, 30) to form the valve body by trapping the cup (1) between the two bearing surfaces (241, 341), it would be possible to use other fastening means, for example snap-fastening or gluing.

Il serait possible d'inverser les deux pièces (20, 30), seuls les orifices étant modifiés pour que le stem continue à saillir de la pièce extérieure et le produit à rentrer par la pièce intérieure.It would be possible to reverse the two parts (20, 30), only the orifices being modified so that the stem continues to protrude from the outer part and the product to enter through the inner part.

La coupelle peut être en aluminium, en fer blanc ou en matériau polymère tel que du polyéthylène téréphtalate (PET) ou du polyéthylène naphtalate (PEN). Les deux pièces (20, 30) du corps de valve sont de préférence en matériau polymère, notamment en POM, en PA, en PE, en PP ou du PBT. Les joints sont en élastomère de type néoprène, butyle, chlorobutyle, en caoutchouc synthétique (Buna®) ou en fluoroélastomère (Viton®). S'ils sont surmoulés sur la coupelle ou sur les pièces (20, 30) du corps de valve, ils sont de préférence en élastomère thermoplastique (TPE) ou en polyuréthane thermoplastique (TPU). La soupape (stem (40) ou siège) est par exemple en POM, en PA ou en PBT. Le ressort est en acier inoxydable ou en matériau polymère, tel que du polyétheréthercétone (Peek). Le tube plongeur (60) peut être en PE.The cup can be made of aluminum, tinplate or a polymeric material such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). The two parts (20, 30) of the valve body are preferably made of polymer material, in particular POM, PA, PE, PP or PBT. Seals are made of neoprene, butyl, chlorobutyl, synthetic rubber (Buna ® ) or fluoroelastomer (Viton ® ) type elastomer. If they are overmolded on the cup or on the parts (20, 30) of the valve body, they are preferably made of thermoplastic elastomer (TPE) or thermoplastic polyurethane (TPU). The valve (stem (40) or seat) is for example made of POM, PA or PBT. The spring is made of stainless steel or a polymeric material, such as polyetheretherketone (Peek). The dip tube (60) can be made of PE.

La valve peut être utilisée pour toute sorte d'applications, notamment dans le domaine cosmétique, pharmaceutique, vétérinaire, alimentaire, des produits techniques, des produits ménagers, etc.The valve can be used for all kinds of applications, in particular in the cosmetics, pharmaceutical, veterinary, food, technical products, household products, etc. fields.

L'assemblage de la valve se fait par emboîtage puis soudure ultrasonique des deux pièces formant le nouveau corps de valve qui emprisonnent ainsi la coupelle. Cette façon de faire conduit à une maîtrise précise des paramètres d'assemblage et donc à un assemblage fiabilisé en termes d'étanchéité, de hauteur de stem et d'actionnement de la valve.The assembly of the valve is done by fitting then ultrasonic welding of the two parts forming the new valve body which thus imprison the cup. This approach leads to precise control of the assembly parameters and therefore to a reliable assembly in terms of sealing, stem height and valve actuation.

Il n'y a plus de problème d'étanchéité grâce à la soudure des deux pièces l'une sur l'autre. Le corps de valve ne risque plus d'être déformé comme cela est le cas avec le sertissage, ce qui élimine le risque de voir le stem se coincer ou nécessiter une force d'actionnement trop importante. Sans sertissage, il n'y a plus non plus de problème de côtes à respecter, ni de risque de fissuration de la coupelle suite à sa déformation due au sertissage en sens inverse de la déformation due à l'emboutissage de la coupelle. La hauteur du stem (concrètement, de l'extrémité saillante de la tige), ne dépend plus du sertissage et de l'usure de la pince de sertissage, mais de la précision du moulage des deux pièces, ce qui est plus facile à maîtriser.There is no more sealing problem thanks to the welding of the two parts one on the other. The valve body no longer risks being deformed as is the case with crimping, which eliminates the risk of the stem getting stuck or requiring too much actuation force. Without crimping, there is also no longer any problem of ribs to be respected, nor any risk of cracking of the cup following its deformation due to the crimping in the opposite direction to the deformation due to the drawing of the cup. The height of the stem (specifically, the protruding end of the stem), no longer depends on the crimping and the wear of the crimping pliers, but on the precision of the molding of the two parts, which is easier to master .

La nouvelle valve comprend certes un composant supplémentaire, à savoir le joint de coupelle (71), mais le fait que les joints de coupelle et de soupape peuvent être surmoulés simplifie les opérations d'assemblage. Ce surmoulage des joints, qui n'ont plus besoin d'être posés, contribue à un gain de temps lors de l'opération de montage, ainsi qu'à un gain de fiabilité de l'étanchéité de la valve, le joint ne risquant plus de mal se placer ou de se déplacer avant la fin du montage de la valve.The new valve does include an additional component, namely the cup seal (71), but the fact that the cup and valve seals can be overmolded simplifies assembly operations. This overmolding of the gaskets, which no longer need to be fitted, contributes to saving time during the assembly operation, as well as to a gain in the reliability of the sealing of the valve, the gasket not risking no more struggling to position yourself or move around before the end of the assembly of the valve.

Références :References :

11
ValveValve
1010
Coupelle
11 Paroi de la coupelle
12 Ouverture centrale
121 Col redressé entourant l'ouverture centrale
13 Rebord périphériqueCup
11 Cup wall
12 Central opening
121 Straightened neck surrounding the central opening
13 Peripheral edge
2020
Pièce extérieure du corps de valve
21 2nde paroi cylindrique
22 2nde paroi de fermeture
221 Nervure d'étanchéité
23 2nd orifice
24 2nde paroi d'appui
241 2nde surface d'appui
25 2nde surface de fixationOuter part of the valve body
21 2nd cylindrical wall
22 2nd closing wall
221 Sealing rib
23 2nd hole
24 2nd supporting wall
241 2nd bearing surface
25 2nd mounting surface
3030
Pièce intérieure du corps de valve
31 1ère paroi cylindrique
311 Épaulements de guidage
312 Canaux pour le gaz propulseur
313 Arête de la 1ère paroi cylindrique
32 1ère paroi de fermeture
321 Tenon pour tube plongeur
33 1er orifice
34 1ère paroi d'appui
341 1ère surface d'appui
342 Nervure d'étanchéité
35 1ère surface de liaison
351 Surépaisseur de matièreInner part of the valve body
31 1st cylindrical wall
311 Guide shoulders
312 Channels for propellant gas
313 Edge of the 1st cylindrical wall
32 1st closing wall
321 Tenon for dip tube
33 1st hole
34 1st supporting wall
341 1st bearing surface
342 Sealing rib
35 1st connecting surface
351 Material allowance
4040
Stem
41 Paroi cylindrique
411 Extrémité de sortie de produit
412 Orifices
42 Couronne
421 Nervure d'étanchéité
43 Tenon de guidagestem
41 Cylindrical wall
411 Product outlet end
412 Holes
42 Crown
421 Sealing rib
43 Guide pin
5050
RessortSpring
6060
Tube plongeurDip tube
7171
Joint de coupelleCup seal
7272
Joint de soupapevalve seal
7373
Joint de boîtierHousing seal
AAT
Axe principalMain axis

Claims (14)

  1. Valve body intended to be fastened to a cup (10) provided with an opening (12) in order to form an aerosol generator valve, which valve body comprises a tubular body closed at one of its ends by a closure wall provided with an orifice and extending along a main axis (A), wherein the valve body is constituted by two parts (20, 30) which are separate before assembly of the valve, one (30) of the two parts being provided with the closure wall (32) and a portion or all of the tubular body (31), and the other (20) of the two parts being provided with another closure wall (22) provided with another orifice (23) and with the rest of the tubular body, each part (20, 30) being provided with fastening means (25, 35) so that in the assembled state of the valve, one (20) of the two parts is located on one side of the cup and the other (30) of the two parts is located on the other side of the cup, a portion of at least one of the two parts passing through the opening (12) of the cup so as to protrude on the other side of the cup, characterized in that each part is provided with a bearing surface (241, 341), and in that the two parts are fastened to each other by their fastening means while clamping, between their respective bearing surfaces (241, 341), the cup at an annular portion (121) located around the opening (12), wherein a cup seal (71) may be overmolded on one of the bearing surfaces (341).
  2. Valve body according to the preceding claim, characterized in that the orifice (23) of one (22) of the two closure walls is dimensioned to allow an outlet rod for the product contained in the aerosol generator to pass through, the rod being carried by a valve element (40) intended to be inserted at least partially into the valve body or by a actuator intended to actuate the valve, the orifice (33) of the other (32) of the two closure walls being dimensioned to allow the product contained in the aerosol generator to enter the valve body, wherein a fastening tenon (321) may be provided around the orifice (33) on the outer face of the other closure wall (32) in order to fasten a dip tube (60), an anti-collapsing device or any other similar device to the valve body.
  3. Valve body according to the preceding claim, characterized
    - in that a first (30) of the two parts of the valve body is provided with a first tubular wall (31) closed at one of its ends by a first (32) of the two closure walls, a first bearing wall (34) being formed on the outer face of the first tubular wall (31), the face of the first bearing wall (34) opposite to the first closure wall (32) constituting the first (341) of the two bearing surfaces, and
    - in that the second (20) of the two parts of the valve body is provided with the second (22) of the two closure walls and, if applicable, with a second tubular wall (21) closed at one of its ends by said second closure wall (22), a second bearing wall (24) being formed at the periphery of the second closure wall (22) or on the outer face of the second tubular wall (21), the face of the second bearing wall (24) opposite to the outer face of the second closure wall (22) constituting the second (241) of the two bearing surfaces.
  4. Valve body according to the preceding claim, characterized
    - in that the fastening means of the first part (30) are constituted by a first fastening surface (35) formed on the outer surface of the first tubular wall (31) inside a projection, relative to the main axis (A), of the first bearing surface (341), or said first fastening surface (35) is formed on the edge of the first tubular wall opposite to the first closure wall (32),
    - in that the fastening means of the second part (20) are constituted by a second fastening surface (25) formed at the periphery of the second closure wall (22) inside a projection, relative to the main axis (A), of the second bearing surface (241), or said second fastening surface is formed on the second tubular wall (21), preferably on the edge of the second tubular wall (21) opposite to the second closure wall (22),
    the two fastening surfaces (25, 35) having superimposable shapes, wherein one of the two fastening surfaces (35) may be provided with an extra thickness of material for welding (351).
  5. Valve body according to one of claims 3 or 4, characterized in that the first tubular wall (31) is dimensioned to form the tubular body of the valve body, so that, in the assembled state of the valve, the end (313) of the first tubular wall (31) opposite to the first closure wall (32) is in contact with the second closure wall (22) of the other part, preferably with interposition of a seal (72).
  6. Valve body according to the preceding claim, characterized in that
    - the first fastening surface is formed on the edge of the first tubular wall opposite to the first closure wall, and the second fastening surface is formed on the second closure wall, the second bearing surface being formed on the periphery of the second closure wall, the second part not having a second tubular wall; or
    - the first fastening surface (35) is formed on the outer face of the first tubular wall (31), preferably on the first bearing wall (34), preferably in a groove formed on the first bearing wall (34) inside the first bearing surface (341), and the second fastening surface (25) is formed on the edge of the second tubular wall (21), the second bearing surface (24) being formed on the periphery of the second closure wall (22) or on the outer face of the second tubular wall (21).
  7. Valve body according to one of claims 3 or 4, characterized in that the first tubular wall (31) and the second tubular wall (21) have superimposable transverse cross-sections and together constitute, in the assembled state of the valve, the tubular body of the valve body, the first fastening surface (35) being formed by the edge of the first tubular wall (31) opposite to the first closure wall (32) and the second fastening surface (25) being formed by the edge of the second tubular wall (21) opposite to the second closure wall (22).
  8. Valve body according to one of claims 2 to 7, characterized in that a valve seal (72) is provided against the inner face of the closure wall (22) provided with the orifice (23) dimensioned to let the product outlet rod (41) located on the valve element (40) or on a actuator pass through, said valve seal being dimensioned to ensure sealing between a valve element placed in the valve body and the inner face of said closure wall (22) as well as between the product outlet rod (41) and the orifice (23) of said closure wall (22), said valve seal preferably being overmolded.
  9. Valve for aerosol generator, comprising
    - a cup (10) provided with an opening (12) and adapted to be fastened by its peripheral edge (13) to an aerosol container,
    - a valve body according to one of the preceding claims, and
    - a valve element (40) housed at least partially in the valve body,
    wherein one (20) of the two parts is located on one side of the cup and the other (30) of the two parts is located on the other side of the cup, a portion of at least one of the two parts passing through the opening (12) of the cup so as to protrude on the other side of the cup, the two parts being fastened to each other by their fastening means while clamping, between their respective bearing surfaces (241, 341), an annular portion (121) of the cup located around the opening (12).
  10. Valve according to the preceding claim, characterized in that a cup seal (71) is interposed between the cup (121) and one of the bearing surfaces (341) to ensure sealing at the interface between the cup and said bearing surface (341), said bearing surface (341) preferably being provided with a sealing rib (342) intended to be compressed against the cup seal (71) in the assembled state of the valve.
  11. Valve according to the preceding claim, characterized in that the cup seal (71) is dimensioned to also ensure sealing at an interface between the two parts (20, 30) of the valve body.
  12. Valve according to claim 10 or 11, characterized in that the cup seal (71) is overmolded on the cup.
  13. Valve according to one of claims 10 to 12, characterized in that the edge of the opening (12) of the cup is deformed towards one of the faces of the cup to form an annular collar (121), preferably forming a planar annular edge, the edge of the collar (121) bearing against one (241) of the bearing surfaces in the assembled state of the valve.
  14. Valve according to one of claims 10 to 13 associated with claim 4, characterized in that the two parts (20, 30) are fastened to each other while clamping the cup (10) between them by irreversible fastening of their fastening surfaces (25, 35) to each other, preferably by welding, optionally using an extra thickness of material for welding (351) provided on one of the fastening surfaces (35), in particular by ultrasonic welding.
EP19726413.8A 2018-05-28 2019-05-27 Valve body to be mounted on a cup Active EP3802360B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1854513A FR3081530B1 (en) 2018-05-28 2018-05-28 VALVE BODY TO BE MOUNTED ON A CUP
PCT/EP2019/063692 WO2019229004A1 (en) 2018-05-28 2019-05-27 Valve body to be mounted on a cup

Publications (3)

Publication Number Publication Date
EP3802360A1 EP3802360A1 (en) 2021-04-14
EP3802360C0 EP3802360C0 (en) 2023-06-21
EP3802360B1 true EP3802360B1 (en) 2023-06-21

Family

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EP19726413.8A Active EP3802360B1 (en) 2018-05-28 2019-05-27 Valve body to be mounted on a cup

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US (1) US11273972B2 (en)
EP (1) EP3802360B1 (en)
AR (1) AR115445A1 (en)
BR (1) BR112020022115A2 (en)
CA (1) CA3099626A1 (en)
FR (1) FR3081530B1 (en)
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Publication number Priority date Publication date Assignee Title
MX2022000993A (en) * 2019-07-24 2022-02-16 Lindal France Sas Valve cup for pressurised container.
FR3099470B1 (en) 2019-07-29 2021-09-10 Lindal France Pressure vessel valve

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775483A (en) * 1955-01-20 1956-12-25 Scovill Manufacturing Co Aerosol bomb filling and dispensing valve
US2965271A (en) * 1956-12-27 1960-12-20 Dev Res Inc Valve body incorporating mounting cup mask and gasket
US3396874A (en) * 1967-05-15 1968-08-13 Afa Corp Positive action dispensing valve
DE2013178A1 (en) * 1969-03-26 1970-10-08 Dart Industries Inc., Los Angeles, Calif. (V.St.A.) Aerosol container with an opening which can be closed by a cap, optionally containing a valve
US7374068B2 (en) * 2004-10-08 2008-05-20 Homax Products, Inc. Particulate materials for acoustic texture material
WO2007107174A1 (en) * 2006-03-21 2007-09-27 Coster Tecnologie Speciali S.P.A. Structural unit for a dispensing valve for dispensing pressurized fluids, and container having a structural unit of this type
DE102007040296A1 (en) * 2007-08-24 2009-02-26 Fazekas, Gàbor Solid valve

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MX2020011351A (en) 2020-11-24
FR3081530A1 (en) 2019-11-29
US11273972B2 (en) 2022-03-15
EP3802360C0 (en) 2023-06-21
US20210237962A1 (en) 2021-08-05
BR112020022115A2 (en) 2021-01-26
AR115445A1 (en) 2021-01-20
EP3802360A1 (en) 2021-04-14
WO2019229004A1 (en) 2019-12-05
CA3099626A1 (en) 2019-12-05
FR3081530B1 (en) 2020-05-29

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