EP1150906A1 - Pressurised dispenser container base with two aluminium alloy chambers - Google Patents
Pressurised dispenser container base with two aluminium alloy chambersInfo
- Publication number
- EP1150906A1 EP1150906A1 EP00903753A EP00903753A EP1150906A1 EP 1150906 A1 EP1150906 A1 EP 1150906A1 EP 00903753 A EP00903753 A EP 00903753A EP 00903753 A EP00903753 A EP 00903753A EP 1150906 A1 EP1150906 A1 EP 1150906A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminum alloy
- portions
- orifice
- toric
- wall
- 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.)
- Granted
Links
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
- B65D83/42—Filling or charging means
Definitions
- the invention relates to aluminum alloy housings dispensing under pressure liquid, creamy or pasty products. More precisely, it relates to housings offering a sealed separation between the product to be dispensed and the propellant gas, the product being separated from the gas either by an internal pocket or by a piston. While the outer case is made of aluminum alloy, the pocket or the piston can be made of any metallic or plastic material. The separation of the product and the propellant gas makes it possible in particular to avoid the modification of the characteristics of the product under the effect of prolonged contact with the propellant gas.
- the steel housings are made in three parts: a dome, a cylindrical wall and a bottom.
- the bottom is a thin stamped disc (less than 0.3mm thick) and shallow which is then crimped onto the cylindrical wall. Formatting a bottom intended to accommodate a nozzle such as the Nicholson nozzle does not pose too many problems, it is easy to produce an annular bowl 12 delimited by a cylindrical wall on the outside and another cylindrical wall 13 of low height which constitutes the wall of the hole orifice. Such a bowl shape allows you to take full advantage of the particular shape of the Nicholson mouthpiece.
- the Nicholson nozzle has two annular grooves with slightly different throat diameters.
- the bottom of the upper annular groove 17, close to the end of the end piece, surmounted by the upper bead 16, has a smaller radius than the bottom of the lower groove 22, close to the base of the end piece, surmounted by the bead 21.
- the endpiece is half pressed into the bowl. It is retained by simple contact, possibly with a slight tightening, of the lower wall of the upper bead 16 with the upper end 18 of the cylindrical wall 13. In this position, the longitudinal grooves 28 of the endpiece allow communication between the lower part of the case and the outside. This is how the box is delivered to the conditioner, that is to say equipped with the Nicholson tip half pressed into the bottom.
- the conditioner fills the upper compartment with the product to be dispensed, injects the propellant under pressure into the lower housing of the housing - the passage of the gas being carried out thanks to the longitudinal grooves 28 -, then pushes the endpiece all the way.
- the hermetic sealing of the housing is obtained by plating over its entire height the cylindrical wall 13 against the bottom of the lower annular groove 22. A slight tightening is ensured by giving the diameter at rest of the elastomer end piece a slightly higher value to that of the diameter of the cylindrical wall 13.
- the aluminum alloy housings are produced in one or two pieces: the bottom and the cylindrical wall are obtained simultaneously by impact spinning from a pin, possibly followed by drawing.
- the dome is either attached and crimped (two pieces) or obtained by conification of the upper end of the cylindrical wall (one piece).
- the absence of a crimping bead in the lower part of the case (one and two-piece cases) and in the upper part (one-piece cases) gives aluminum alloy cases a particularly appreciated aesthetic appearance.
- the Nicholson endpiece used as standard on steel cases has never been able to hermetically seal the lower part of aluminum alloy cases. It is supposed that the main reason lies in the fact that the bottom of aluminum alloy, obtained by impact spinning, is generally thicker than cannot be a deep-drawn steel bottom: it generally has a thickness greater than 0.5 mm. It is not possible under these conditions to produce a bowl shape such as that described in US 3,522,900. In particular, it is difficult to produce the cylindrical wall 13, which, having to be housed over its entire height in the groove lower ring to ensure tight sealing, should have a height ( ⁇ 0.7 mm) barely greater than the thickness of the bottom.
- the injection of the propellant gas through the elastomeric strand is more difficult to achieve than in the case of steel bottoms provided with their Nicholson endpiece.
- the propellant gas injection devices which must respect a production rate adapted to the industrial conditions of the conditioners, prove to be much more expensive than those used with steel casings.
- the tip has a diameter which can only be slightly greater than that of the hole and, due to this weak tightening and the hole caused by the needle, the seal offered by the strand is not perfect.
- the Applicant has sought to remedy these defects by trying to improve the economic position of the aluminum case compared to that of the steel case, already handicapped by the material cost and the transformation cost and while retaining the advantageous aesthetic appearance. linked to the absence of a crimping bead at the base of the case.
- the object of the invention is an aluminum alloy case having a new bottom of particular shape.
- Another object of the invention is the method which makes it possible to shape such a box.
- the housing according to the invention has a bottom having a conventional overall shape, that is to say spherical concave, but, in the vicinity of the central hole, the wall has a particular shape.
- Figure 1 we can describe, starting from the outside and moving towards the axis, the central part of the bottom perforated by the following geometric portions: first a spherical portion S, similar to the conventional spherical portion of the distributor housing base in alloy aluminum, whose concavity is oriented downwards, then a succession of three toric portions A, B and C having alternately an upward concavity (A), downward (B), the last portion (C) having an upward concavity.
- the portions connect to each other tangentially, the connection point between each pair of adjacent portions is an inflection point.
- the tangents to the inflection points, border points between the portions S and A on the one hand and B and C on the other hand, are substantially horizontal, preferably rising and inclined by less than 30 ° for the first, descending and inclined less than 10 ° for the second.
- the tangent to the point of inflection, border between the portions A and B, is substantially parallel to the axis, preferably inclined more than 60 ° relative to the horizontal.
- the shape which results from the succession of the portions S, A and B constitutes a bowl intended to collect the base of the Nicholson nozzle: when the nozzle is fully inserted, its base is housed in the bowl, which improves its protection vis-à-vis any brutal lateral movement of a foreign body coming into contact with the bottom.
- the last toric portion (C) has a wall of non-horizontal thickness.
- the lower angle of this wall determines the calibrated diameter of the orifice.
- the latter is a few tenths of a millimeter lower than that of the bottom of the upper groove of the Nicholson nozzle and almost one millimeter less than that of the bottom of the lower annular groove of this same nozzle.
- the tightening of the elastomer end piece is aimed at by the bottom angle of the wall of thickness of the bottom, whatever the insertion position of the end piece, the bottom having no cylindrical wall around the hole.
- the inclination of the wall of thickness has the advantage of ensuring good retention of the nozzle and a perfect seal (in the fully depressed position), whatever the thickness from the bottom, since it is its lower angle which calibrates the hole and which acts by clamping on the nozzle.
- a firm hold of the end cap on the bottom of the housing is ensured, whether the end cap is pressed in half or completely. Thanks to the deformation of the elastomer end piece under the effect of the lower angle of the thickness wall, a tight hold is ensured when the end piece is pushed in fully.
- the blank is generally placed on a turntable, where, by buffering in several passes, the bottom is formed (spinning alone) or finished (spinning-stretching), the cropped end of the cylindrical wall is conified then the end edge is rolled, so as to produce the bead for fixing the valve cup.
- a complementary shaping comprising three stages which do not necessarily follow in time and consisting of a perforation of the central hole of the already domed bottom, in a preforming of the bowl, and in a final shaping of the thick wall bordering the hole.
- pairs of tools with complementary shapes, of the punch and die type are used so as to properly support and make repetitive the deformation of the bowl and the inclination of the wall. thick.
- Each of these additional stages can be introduced during the trimming, during the possible stretching or at the first stages of the conification
- the bottom under the effect of the polnUSin, is supported on a bending pad and takes an overall shape of a spherical bulge.
- the base is placed on a matrix having, above the conventional spherical bulge of the bending block, an appendage corresponding in relief to the bowl to be produced, but with a horizontal top wall.
- the compression of the central part of the bottom between punch and die gives a first form of bowl blank, having a horizontal bottom.
- the punch and the die being held close together to block the spherical wall of the bottom and the external edge of the bowl, a movable finger sliding in the axis of the die, of diameter greater than the diameter of the perforation hole, performs an axial movement towards the top and slightly turns the internal edge of the bowl while calibrating the diameter of the perforated hole.
- the choice of the perforation diameter depends on the thickness of the bottom and the inclination sought for the thickness wall bordering the hole: for a standard Nicholson joint, it is preferably close to 45 °. It goes without saying that it could be adapted to any other form of Nicholson type joint, that is to say any geometry of joint having two annular grooves and at least a longitudinal groove allowing the filling of the propellant gas in a first insertion position and then the hermetic storage of said propellant gas in a second insertion position. What matters is that the inclination of the wall is such that, even if the bottom has a greater thickness, the lower angle of the end wall continues to be easily accommodated at the bottom of the lower annular groove by imposing a tightening close to 1 mm. Such a bottom wall geometry is therefore well suited to the installation of a Nicholson type end piece, whatever the thickness of the bottom and, obviously, whatever the material of the bottom.
- Figure 1 shows at the top a section through a diametrical plane of the central part of the bottom of the housing according to the invention and below a section of a standard Nicholson tip.
- Figure 2 shows in section through a diametrical plane the tip half pressed into the bottom, in the position it occupies at the time of the injection of the propellant.
- Figure 3 shows in section through a diametrical plane the tip fully inserted, hermetically sealing the lower part of the housing filled with propellant.
- EXAMPLE Figures 1, 2 and 3
- the Nicholson tip 10 shortly before its insertion into the bottom 1, shown here only by its central part 2, perforated with an orifice 3 at the axis. It has two annular grooves 17 and 22, the diameters of the bottom of the groove are slightly different.
- the bottom of the upper annular groove 17, close to the end of the end piece, surmounted by the upper bead 16, has a radius of ⁇ 2.7 mm, smaller than that of the bottom of the lower groove 22, close to the base 27 of the nozzle, surmounted by the bead 21, the latter being equal to approximately 3.05 mm.
- the lower wall 19 of the upper annular groove 17 is frustoconical, inclined at about 60 °.
- the lower annular groove 22 has a height of ⁇ 0.7 mm.
- the base 27 of the endpiece has a diameter of approximately 8.7 mm.
- the upper bead 16 has a diameter of approximately 6J mm and the lower bead 21 has a diameter of 6.6 mm.
- the central part 2 of the perforated bottom has the following geometric portions: first a spherical portion S, similar to the conventional spherical portion of the distributor housing bottoms made of aluminum alloy, the concavity of which is oriented downwards, then a succession of three toric portions A, B and C.
- the toric portion A having an upward concavity, has a section in the shape of a circular sector with a thickness of 0.5 mm, the center of which is 6.705 mm from the axis and the outside radius RA of which is equal to 2 mm.
- the toric portion B having a downward concavity, has a section in the shape of a circular sector with a thickness of 0.5 mm, the center of which is 3.93 mm from the axis and whose internal radius RB is equal to 1 mm.
- the toric portion C having an upward concavity, has a section in the shape of a circular sector with a thickness of 0.5 mm, the center of which is 3.725 mm from the axis and the outside radius RC of which is equal to 1, 3 mm.
- L ⁇ tangent to the inflection point L, border point between the portions S and A makes an angle of 14 ° with the horizontal.
- the tangent to the inflection point M, the border point between the portions A and B makes an angle of 66 ° with the axis.
- the tangent to the inflection point N, the border point between the portions B and C is descending and makes an angle of 4 ° with the horizontal.
- the wall of thickness 4 is inclined by 46 ° relative to the horizontal and its lower angle 5 calibrates the orifice with the diameter 5J mm.
- the Nicholson nozzle 10 is shown half pressed into the bowl 12. It is retained with a slight tightening (0.3mm) of the lower angle 5 of the wall of thickness 4 on the bottom of the upper annular groove 17.
- the Nicholson end piece 10 is shown fully inserted into the bowl 12. It is retained with a tightening of almost 1 mm from the lower angle 5 of the thickness wall 4 on the bottom of the annular groove lower 17. In the vicinity of the clamping zone, the end piece is slightly deformed. The thick wall has a slight inclination, so that the tightening is carried out only at the level of the lower angle.
- the outer wall of the bottom at the point of inflection N, border point between the toric parts B and C, is almost horizontal, which makes it possible not to deform the base 27 of the Nicholson tip 10 too much.
- the thickness of the bottom has no influence on the quality of the contact, from the moment when the metallic bottom is clearly more rigid than the elastomer end piece.
- the spherical part S, the toric part A and a large part of the spherical part B are kept embedded between die and punch and an axial finger of 5J mm in diameter rises by turning the initially horizontal bottom of the bowl which is pressed against a locally convex part of the generally concave wall of the punch thereby achieving the toric portion C.
- the thickness of the bottom is indifferent with regard to the maintenance of the Nicholson tip and the tightness of its closure, it is not indifferent with respect to the shaping conditions and the determination of the diameter initial perforation.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9901808A FR2789662B1 (en) | 1999-02-11 | 1999-02-11 | TWO-CHAMBER ALUMINUM ALLOY PRESSURE DISTRIBUTOR HOUSING |
FR9901808 | 1999-02-11 | ||
PCT/FR2000/000297 WO2000047492A1 (en) | 1999-02-11 | 2000-02-09 | Pressurised dispenser container base with two aluminium alloy chambers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1150906A1 true EP1150906A1 (en) | 2001-11-07 |
EP1150906B1 EP1150906B1 (en) | 2003-07-16 |
Family
ID=9542032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00903753A Expired - Lifetime EP1150906B1 (en) | 1999-02-11 | 2000-02-09 | Pressurised dispenser container base with two aluminium alloy chambers |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1150906B1 (en) |
AU (1) | AU2554000A (en) |
CZ (1) | CZ20012881A3 (en) |
DE (1) | DE60003889T2 (en) |
ES (1) | ES2202052T3 (en) |
FR (1) | FR2789662B1 (en) |
WO (1) | WO2000047492A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2862307B1 (en) * | 2003-11-13 | 2006-04-28 | Commissariat Energie Atomique | POLYETHYNYLENE PHENYLENE ETHYNYLENE SILYLENE MODIFIED POLYMERS), COMPOSITIONS CONTAINING SAME, PROCESSES FOR PREPARING THE SAME, AND CURED PRODUCTS. |
US10246250B2 (en) | 2016-04-21 | 2019-04-02 | Crown Packaging Technology, Inc. | Beverage can having a grommet |
FR3084065B1 (en) | 2018-07-18 | 2021-10-01 | Lindal France | CASE FOR PRESSURE CONTAINER |
CN109188649B (en) * | 2018-09-19 | 2021-07-02 | 珠海达理宇航科技有限公司 | Protective device for polygonal barrel and space telescope lens |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3522900A (en) | 1967-10-18 | 1970-08-04 | Continental Can Co | Valve for product dispensing container |
DE2226278A1 (en) | 1971-06-09 | 1973-01-04 | Sterigard Corp | PRESSURE SENSOR CAN WITH A FUEL FILLING DEVICE AND PROCESS FOR THEIR PRODUCTION |
EP0227049A3 (en) * | 1985-12-24 | 1988-10-12 | S.C. Johnson & Son, Inc. | Single stage aerosol pressurization grommet |
-
1999
- 1999-02-11 FR FR9901808A patent/FR2789662B1/en not_active Expired - Fee Related
-
2000
- 2000-02-09 EP EP00903753A patent/EP1150906B1/en not_active Expired - Lifetime
- 2000-02-09 DE DE60003889T patent/DE60003889T2/en not_active Expired - Fee Related
- 2000-02-09 AU AU25540/00A patent/AU2554000A/en not_active Abandoned
- 2000-02-09 CZ CZ20012881A patent/CZ20012881A3/en unknown
- 2000-02-09 WO PCT/FR2000/000297 patent/WO2000047492A1/en active IP Right Grant
- 2000-02-09 ES ES00903753T patent/ES2202052T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0047492A1 * |
Also Published As
Publication number | Publication date |
---|---|
CZ20012881A3 (en) | 2002-08-14 |
FR2789662B1 (en) | 2001-03-16 |
AU2554000A (en) | 2000-08-29 |
FR2789662A1 (en) | 2000-08-18 |
DE60003889D1 (en) | 2003-08-21 |
EP1150906B1 (en) | 2003-07-16 |
DE60003889T2 (en) | 2004-06-03 |
WO2000047492A1 (en) | 2000-08-17 |
ES2202052T3 (en) | 2004-04-01 |
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