EP3847291A1 - Alliage d'aluminium, produit semi-fini, procédé pour fabriquer une pastille, procédé pour fabriquer une boîte et utilisation d'un alliage d'aluminium - Google Patents

Alliage d'aluminium, produit semi-fini, procédé pour fabriquer une pastille, procédé pour fabriquer une boîte et utilisation d'un alliage d'aluminium

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Publication number
EP3847291A1
EP3847291A1 EP19765436.1A EP19765436A EP3847291A1 EP 3847291 A1 EP3847291 A1 EP 3847291A1 EP 19765436 A EP19765436 A EP 19765436A EP 3847291 A1 EP3847291 A1 EP 3847291A1
Authority
EP
European Patent Office
Prior art keywords
weight
slug
aluminum
aluminum alloy
raw
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
Application number
EP19765436.1A
Other languages
German (de)
English (en)
Other versions
EP3847291B1 (fr
Inventor
Alexander Wimmer
Helmut KLARUM
Otmar HOCHECKER
Dietmar Wiest
Sebastian Stumpp
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.)
Neuman Aluminium Austria GmbH
Tubex Holding GmbH
Original Assignee
Neuman Aluminium Austria GmbH
Tubex Holding GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Neuman Aluminium Austria GmbH, Tubex Holding GmbH filed Critical Neuman Aluminium Austria GmbH
Publication of EP3847291A1 publication Critical patent/EP3847291A1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/06—Special casting characterised by the nature of the product by its physical properties
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering

Definitions

  • the invention relates to an aluminum alloy, a semi-finished product, a can, a method for producing a slug, a method for producing a can and to the use of an aluminum alloy.
  • Aerosol cans made of aluminum or an aluminum alloy generally have a cylindrical can body, a can bottom that closes one end of the cylindrical can body, a can shoulder, a can neck at an opposite end of the can bottom, and a valve and a spray head.
  • Such aerosol cans are typically produced by means of extrusion, in particular by means of backward extrusion or a combined forward and backward extrusion process.
  • As a semi-finished product for the production of aerosol cans slugs several millimeters thick, punched out of aluminum or aluminum alloy strips, are used.
  • the raw cans present after the extrusion are - in addition to further processing steps - usually subjected to a washing and cleaning step before the inside of the cans are provided with a lacquer coating (internal lacquer) in order to protect a filler from direct contact with the can wall.
  • a lacquer coating internal lacquer
  • the inner varnish is baked in a stoving oven.
  • Other work steps include painting the exterior, printing and coating the outer surface of the raw can, as well as molding the aerosol can end contour.
  • the cans should have an appropriate strength in order to offer a secure container to an ingredient under pressure.
  • the cans should be light and therefore thin-walled.
  • the strength properties of an aerosol can are determined to a large extent by the composition of a slug used to manufacture an aerosol can and in particular by its manufacturing process.
  • Aluminum alloys are known, for example, from EP 1 064 413 B1, FR 2 457 328 A1, JP 2008169417 A, US 2006/0021415 A1 and US 2014/0298641 A1.
  • Aerosol cans made from aluminum alloys generally have a higher strength and pressure resistance than pure aluminum.
  • it is used - as is also the case with the use of pure aluminum - there is the problem that there is a drop in hardness and therefore also in strength during the manufacturing process of the can, in particular during the baking of an inner lacquer.
  • the inner lacquer is stoved in a temperature range of 230 ° C to 250 ° C, which leads to a reduction in the strain hardening achieved during the extrusion process due to the recovery and recrystallization effects in the aluminum alloy.
  • thicker wall thicknesses are typically chosen for the can in order to be able to meet the required technical properties and safety standards of the can. This applies in particular to their pressure resistance.
  • a higher wall thickness is disadvantageous for economic reasons and for weight considerations and therefore from a handling point of view.
  • the invention is based on the object of an aluminum alloy which is improved compared to the prior art, a semifinished product which is improved compared to the prior art, in particular a slug improved compared to the prior art, a can improved compared to the prior art, and a compared to the prior art to provide an improved process for the production of a slug, to provide a process for producing a can which is improved compared to the prior art, and to use an aluminum alloy which is improved compared to the prior art.
  • the aluminum alloy is said to be particularly suitable for producing a can, preferably an aerosol can, with a high strength and at the same time a low can wall thickness.
  • the invention solves this problem by providing an aluminum alloy with the features of independent claim 1, a semi-finished product or a can according to claim 10, a method for producing a slug according to claim 1 1, a method for producing a can according to claim 14 and a use an aluminum alloy according to claim 15.
  • Preferred embodiments of the aluminum alloy are the subject of dependent claims 2 to 9.
  • Preferred embodiments of the method for producing the slug are subject of dependent claims 12 and 13.
  • the wording of all Claims are hereby made by express reference to the content of the present description.
  • the invention relates to an aluminum alloy, in particular for a slug, that is to say a round blank, and / or a can, preferably an aerosol can.
  • the aluminum alloy consists of:
  • the aluminum alloy can either be made of
  • the proportions disclosed in the present invention in percent by weight (wt%), i.e. the so-called weight fractions are each based on the total weight of the aluminum alloy.
  • the term “slug” or “round blank” is intended to mean a disk, in particular a cylindrical disk, preferably a circular-cylindrical disk.
  • the disk preferably has a very low height in relation to the diameter.
  • the disk can have a height of 3 mm to 13 mm, in particular 4 mm to 10 mm, preferably 4.5 mm to 7 mm, and / or a diameter of 10 mm to 130 mm, in particular 20 mm to 80 mm, preferably 30 mm to 60 mm.
  • the term “aerosol can” is to be understood as a can for spraying liquids or semi-liquid media in the form of an aerosol.
  • the liquids or semi-liquid media can be, for example, a hairspray, a deodorant, a shaving foam, a color, a paint, a varnish, a lacquer, a furniture polish, an oil, a liquid soap, a resin, a paraffin liquid wax, natural rubber, a glue, a disinfectant, an impregnating agent, a cleaning agent, an organic liquid, an inorganic liquid, a liquid / semi-liquid food such as spray cream, a liquid / semi-liquid cosmetic product such as trade liquid / semi-liquid personal care product or a liquid / semi-liquid pharmaceutical product.
  • the aerosol can can also be referred to as a spray can.
  • the invention is based on the surprising finding that when an aluminum alloy according to the invention is used to produce a can, preferably an aerosol can, the recovery and recrystallization phase when an inner lacquer is baked into the can can be suppressed.
  • the combination of the elements copper and magnesium contained in the aluminum alloy according to the invention is responsible for this.
  • cluster and / or precipitation hardening occurs at the temperatures used for baking an inner lacquer.
  • metastable clusters and / or precipitates of the alloy elements copper and magnesium are formed, each of which leads to an increase in strength and thus counteracts recrystallization and a loss of strength caused thereby. It was particularly surprising that, according to the invention, even small amounts of the alloy elements copper and magnesium can bring about advantageous changes in the strength properties or the drop in strength in a can, in particular an aerosol can.
  • the alloying of silicon ie the use of silicon for the production of the aluminum alloy, advantageously results in mixed crystal hardening.
  • the finest Mg 2 Si precipitates form, which further increase the strength of the aluminum alloy.
  • the addition of manganese ie the use of manganese for the production of the aluminum alloy, advantageously results in mixed crystal hardening, which (additionally) increases the strength of the aluminum alloy.
  • the finest dispersoids of the formula AI (Fe, Cr, Mn) Si can form, which further increase the strength of the aluminum alloy.
  • the manganese weight fraction provided according to the invention has on the one hand turned out to be sufficiently high to achieve an increase in the strength of the aluminum alloy. On the other hand, it has not proven to be too high in order not to increase the deformation resistance and in particular the risk of cracking too much. This is particularly advantageous when using the aluminum alloy for the production of cans such as aerosol cans.
  • the addition of titanium ie the use of titanium to produce the aluminum alloy, advantageously results in grain refinement and fine grain hardening, which increase the strength and ductility of the aluminum alloy.
  • the aluminum alloy according to the invention can thus be used to produce a can, preferably an aerosol can, with a higher strength in comparison with generic cans and a lower decrease in strength in comparison with generic cans.
  • the higher strength in turn allows, with particular advantage, less use of material, as a result of which cans with a smaller wall thickness can be produced. This is advantageous both from an economic point of view and from a handling point of view (lower weight of the can).
  • the weight fraction of silicon is 0.08% by weight to 0.14% by weight, preferably 0.09% by weight to 0.13% by weight.
  • the silicon in an embodiment of the invention has a proportion of 0.08% by weight to 0.14% by weight, preferably 0.09% by weight to 0.13% by weight, based on the total weight of the aluminum alloy.
  • the weight fraction of iron is 0.30% by weight to 0.40% by weight, preferably 0.32% by weight to 0.36% by weight.
  • the iron has a proportion of 0.30% by weight to 0.40% by weight, preferably 0.32% by weight to 0.36% by weight on the total weight of the aluminum alloy.
  • the proportion by weight of copper is 0.06% by weight to 0.12% by weight, preferably 0.07% by weight to 0.10% by weight.
  • the copper in a further embodiment of the invention has a content of 0.06% by weight to 0.12% by weight, preferably 0.07% by weight to 0.10% by weight on the total weight of the aluminum alloy.
  • cluster and / or precipitation hardening due to the copper is particularly pronounced, in particular during the baking of an inner lacquer into a can which has an aluminum alloy according to the invention or consists of such an aluminum alloy.
  • the weight fraction of manganese is 0.30% by weight to ⁇ (spoken: less) 0.50% by weight, in particular 0.30% by weight to 0.45% by weight, preferably 0.34 % By weight to 0.38% by weight.
  • the manganese has a proportion of 0.30% by weight to ⁇ (spoken: less) 0.50% by weight, in particular 0.30% by weight to 0.45% by weight. %, preferably 0.34% by weight to 0.38% by weight, based on the total weight of the aluminum alloy.
  • the weight fraction of magnesium is 0.06% by weight to 0.16% by weight, preferably 0.08% by weight to 0.12% by weight.
  • the magnesium in a further embodiment of the invention has a proportion of 0.06% by weight to 0.16% by weight, preferably 0.08% by weight to 0.12% by weight on the total weight of the aluminum alloy.
  • cluster and / or precipitation hardening due to the magnesium is particularly pronounced, in particular during the baking of an inner lacquer into a can which has an aluminum alloy according to the invention or consists of such an aluminum alloy.
  • the weight fraction of titanium is 0.015% by weight to 0.03% by weight, preferably 0.02% by weight to 0.028% by weight.
  • the titanium in a further embodiment of the invention has a proportion of 0.015% by weight to 0.03% by weight, preferably 0.02% by weight to 0.028% by weight, based on the total weight of the Aluminum alloy.
  • the related alloying of titanium i.e. H.
  • the use of titanium for the production of the aluminum alloy, the advantages described are particularly evident in the titanium weight fractions disclosed in this paragraph.
  • the additional admixtures are impurities, in particular unavoidable impurities.
  • the plural expression “additional admixtures” can mean a single additional admixture (singular) or a plurality of additional admixtures, that is to say a plurality of additional admixtures, such as two, three or four additional admixtures.
  • the plural expression “impurities” in the context of the present invention can mean a single impurity (singular) or a plurality of impurities, that is to say a plurality of impurities, for example two, three or four impurities.
  • the weight fraction of a single additional admixture, in particular a single impurity is at most 0.05% by weight.
  • a single additional admixture, in particular a single impurity in a further embodiment of the invention has a proportion of at most 0.05% by weight, based on the total weight of the aluminum alloy.
  • the proportion by weight of the additional admixtures, in particular the impurities is at most 0.15% by weight.
  • the additional admixtures, in particular the impurities in a further embodiment of the invention have a total of at most 0.15% by weight, based on the total weight of the aluminum alloy.
  • the aluminum alloy can also be zirconium-free.
  • the invention relates to a semifinished product having or consisting of an aluminum alloy according to the first aspect of the invention, or a can having or consisting of an aluminum alloy according to the first aspect of the invention.
  • the semifinished product can in particular be a slug, a sheet, a plate, a profile, in particular an extruded profile, a tube, a rod or a wire.
  • the semi-finished product is preferably a slug.
  • the can can have a shoulder and / or a can neck.
  • the shoulder can be selected from the group consisting of a rounded shoulder, a spherical shoulder, an oblique shoulder, a stepped shoulder and an ogival shoulder.
  • the can can have an inwardly curved base.
  • the can can still be filled.
  • the can can be filled with a liquid or a semi-liquid medium.
  • the liquids or semi-liquid media can be, for example, a hairspray, a deodorant, a shaving foam, a color, a paint, a varnish, a lacquer, a furniture polish, an oil, a liquid soap, a resin, a paraffin liquid wax, natural rubber, a glue, a disinfectant, an impregnating agent, a cleaning agent, an organic liquid, an inorganic liquid, a liquid / semi-liquid food such as spray cream, a liquid / semi-liquid cosmetic Trade product as a liquid / semi-liquid personal care product or a liquid / semi-liquid pharmaceutical product.
  • the can can contain a blowing agent, in particular a blowing gas, preferably selected from the group consisting of propane, butane, dimethyl ether, air, nitrogen and mixtures of at least two of the aforementioned blowing gases.
  • a blowing agent in particular a blowing gas, preferably selected from the group consisting of propane, butane, dimethyl ether, air, nitrogen and mixtures of at least two of the aforementioned blowing gases.
  • the can can be empty.
  • the can is preferably an aerosol can, i.e. a spray can.
  • the invention relates to a method for producing a slug, in particular according to the second aspect of the invention, with the steps: a) providing aluminum and / or aluminum scrap, b) melting the aluminum and / or the aluminum scrap, c) providing the molten aluminum and / or the molten aluminum scrap with alloying elements, the alloying elements being silicon, iron, copper, manganese, magnesium and titanium, preferably in metallic or elemental form, d) casting, in particular continuous casting, of the molten metal with the Aluminum elements provided with alloying elements and / or the melted aluminum scrap provided with the alloying elements into a strip, e) hot rolling of the strip, f) cold rolling of the hot-rolled strip, g) producing a raw slug from the cold-rolled strip, h) heat treating the raw slug, i) cooling the heat-treated raw slug, in particular with a cooling rate or cooling rate> (spoken: greater than or equal to) 0.01 K / s and j)
  • the raw slug can also be referred to as slug blank.
  • the term “aluminum scrap” is to be understood to mean in particular aluminum waste which can be obtained, for example, from the manufacture of semi-finished products, in particular slugs, made of pure aluminum or aluminum alloy.
  • hot rolling is intended to roll a strip of aluminum or aluminum scrap above the recrystallization temperature of aluminum, i.e. be understood in a temperature range from 250 ° C to 500 ° C.
  • cold rolling means rolling a hot-rolled strip of aluminum or aluminum scrap below the recrystallization temperature of aluminum, i.e. below a temperature of 250 ° C can be understood.
  • the aluminum in step a), can be provided as pure aluminum with an aluminum content of at least 99.5% by weight, preferably at least 99.7% by weight, based on the total weight of the pure aluminum.
  • the aluminum in step a) can be provided in the form of pure aluminum commercially available under the name EN AW-1050A.
  • the aluminum in step a) can be provided in the form of ingots, that is to say in the form of bars, in particular in the form of small bars.
  • the alloying elements silicon, iron, copper, manganese, magnesium and titanium can be added to the melted aluminum and / or the melted aluminum scrap simultaneously or successively, that is to say successively or at intervals from one another.
  • a step cd) of cleaning the molten aluminum and / or molten aluminum scrap can be carried out, for example by blowing in argon.
  • Step d) can also be referred to as strip casting, in particular continuous strip casting, of the molten aluminum provided with the alloying elements and / or of the melted aluminum scrap provided with the alloying elements.
  • the molten aluminum provided with the alloying elements and / or the melted aluminum scrap provided with the alloying elements is expediently poured or transferred into a casting installation, in particular into a casting furnace, in order to carry out step d).
  • the melted aluminum provided with the alloying elements and / or the melted aluminum scrap provided with the alloying elements can have a temperature of 680 ° C. to 750 ° C.
  • Step d) is preferably carried out at a casting speed of 4 m / min to 8 m / min.
  • step d a so-called rotary casting installation is used to carry out step d).
  • the melted aluminum provided with the alloying elements and / or the melted aluminum scrap provided with the alloying elements are continuously poured onto a casting wheel and solidified between the latter and a steel strip.
  • the casting temperature of the melted aluminum provided with the alloying elements and / or of the melted aluminum scrap provided with the alloying elements preferably ranges between 680 ° C. and 730 ° C. Cooling required for the solidification of the aluminum and / or aluminum scrap is preferably carried out via nozzles which act on the casting wheel and the steel strip with water.
  • the melted aluminum provided with the alloying elements and / or the melted aluminum scrap provided with the alloying elements can be provided with at least one of the alloying elements silicon, iron, copper, manganese, magnesium and titanium.
  • the composition of the alloy and therefore the properties of the slug to be produced can be readjusted with particular advantage. Following that repeated cleaning of the melt, for example by blowing in argon.
  • Step e) is preferably carried out at a temperature of 460 ° C. to 500 ° C., in particular 470 ° C. to 490 ° C.
  • step ef) cooling the hot-rolled strip, in particular to a temperature of 20 ° C. to 90 ° C., preferably 30 ° C. to 70 ° C., can be carried out.
  • Step f) is preferably carried out at a temperature of 20 ° C. to 90 ° C., in particular 30 ° C. to 70 ° C.
  • the raw slug is preferably produced from the strip by cutting or punching, particularly preferably by punching.
  • Step h) is preferably carried out at a temperature of 480 ° C. to 550 ° C., in particular 500 ° C. to 540 ° C. This step advantageously achieves a homogeneous microstructure with a uniform distribution of the alloy elements.
  • step h) is carried out for a period of 30 minutes to 3 hours. This step advantageously achieves a homogeneous microstructure with a uniform distribution of the alloy elements.
  • step i) can be carried out at a cooling rate of at least 0.01 K / s, in particular of at least 0.1 K / s.
  • step i) with a cooling rate or cooling rate is> (spoken: greater) 1 K / s, in particular> (spoken: greater) 10 K / s, particularly preferably> (spoken: greater) 50 K / s , carried out.
  • step i) can be carried out at a cooling rate or cooling rate of> 50 K / s to 200 K / s, more preferably> 50 K / s to 150 K / s, particularly preferably> 50 K / s to 100 K / s become.
  • the choice of the cooling rate or cooling rate has a significant influence on the strength of the raw can.
  • a significantly higher can hardness or strength can be achieved when the raw slug is cooled at a cooling rate> 50 K / s.
  • higher hardness or strength enables the production of cans, in particular aerosol cans, with smaller wall thicknesses and consequently the saving of material.
  • step i) can be carried out by air cooling the heat-treated raw slug, i.e. H. by cooling the heat-treated raw slug in air.
  • the air can have a temperature of 15 ° C. to 30 ° C., in particular 18 ° C. to 25 ° C., preferably 20 ° C. to 25 ° C.
  • the air can also be moved to cool the heat-treated raw slug, for example by means of a fan.
  • the heat-treated raw slug can be cooled by moving air, in particular by air moving by means of a fan.
  • step i) is carried out by water cooling the heat-treated raw slug.
  • the heat-treated raw slug is cooled by water in a further embodiment of the invention in step i).
  • the heat-treated raw slug can, for example, be immersed in water or transferred to a water bath.
  • a cooling rate of> 50 K / s can be achieved with particular advantage by water cooling the heat-treated raw slug, which is particularly preferred according to the invention from the point of view of hardness or strength with regard to the production of cans, preferably aerosol cans.
  • a cooling rate of approximately 0.1 K / s can be achieved.
  • step j) can comprise a step j1) surface treatment, in particular roughening, of the raw slug.
  • the raw slug can be surface-treated, in particular roughened, by means of a blasting agent, by means of scrubbing or by means of drums.
  • a defined surface of the raw slug can be produced with particular advantage, as a result of which a uniform lubrication of the raw slug with a lubricant is possible before a forming step, in particular before an extrusion step.
  • surface treatment of the raw slug can in particular also include deburring of the raw slug.
  • step j) can comprise a step j2) cleaning the raw slug from the blasting agent and / or from abrasion occurring during surface treatment, in particular roughening.
  • step j) a step k) packing of the slug can be carried out.
  • the invention relates to a method for producing a can, preferably an aerosol can, in particular according to the second aspect of the invention, with the steps: a) providing a slug according to the second aspect of the invention or producing a slug according to a method according to the third aspect of the invention, b) forming the Butzens to a raw can, c) cutting the raw can to length and d) further processing the cut raw can into the can.
  • the raw can can also be referred to as a can blank.
  • a step ab) can be carried out on the slug with a lubricant, in particular a metal stearate. This makes it particularly advantageous to minimize the friction that occurs when step b) is carried out.
  • Step b) is preferably carried out by means of extrusion, in particular by means of backward extrusion, preferably by means of cup-backward extrusion.
  • step b) can be produced by means of a combined forward-backward extrusion method, by means of a combined deep-drawing and ironing method or by means of extrusion and drawing.
  • the raw can can have a can bottom or a bottom surface and spatially thereafter a can wall or a jacket surface.
  • the raw can can advantageously have the shape of a cylinder open on one side, in particular a circular cylinder open on one side.
  • the raw can may have an irregular shape at its end opposite the can bottom or may be frayed. Furthermore, the raw can can be longer than specified.
  • an irregular end region of the raw can can be removed and thus the raw can can have a regular end and in particular a predetermined length.
  • a step cd) is preferably carried out between step c) and step d), providing the raw can with an inner and / or outer lacquer and baking the inner lacquer and / or drying the outer lacquer.
  • an epoxy-phenol resin paint, a polyamide-imide paint or a paint system based on polyester and / or water and / or powder can be used as the inner paint.
  • Internal varnishes of this type can be applied to the inner surface of the raw can by means of spray nozzles and baked into the raw can in a stoving oven.
  • the outer paint can be applied in particular in several layers to the outer surface of the raw can.
  • the raw can in step cd) can be provided with the outer lacquer by applying a primer layer, a decorative layer such as a color layer and a top coat layer to the outer surface of the raw can, in particular being printed or rolled on.
  • a primer layer a decorative layer such as a color layer and a top coat layer
  • the above-mentioned layers are expediently applied, in particular printed or rolled, onto the outer surface of the raw can in such a way that the primer layer is located directly on the outer surface of the raw can, the decorative layer on the primer layer and the top coat layer on the decorative layer.
  • the raw can can be brushed before performing step d), in particular between step c) and step cd).
  • the outer surface of the raw can can be homogenized in a particularly advantageous manner.
  • the raw can can be cleaned before carrying out step cd), in particular from a lubricant and / or abrasion, and then dried.
  • the raw can can be cleaned, for example, using an alkaline washing solution.
  • the raw can can be dried at a temperature of 120 ° C to 130 ° C, in particular 125 ° C.
  • Step d) preferably comprises a step d1) providing the raw can with a can shoulder and / or a can neck.
  • the diameter of the raw can is preferably narrowed or tapered in the region of its open end compared to the rest of the raw can, which is not deformed, so that the neck of the can is produced or is produced.
  • Step d1) can be carried out in several sub-steps, so that the diameter of the raw can in the region of its open end is gradually narrowed or tapered.
  • the diameter of the raw can can be tapered and then widened before a can shoulder is drawn in.
  • step d) can comprise a step d2) forming or flanging a spray valve seat for fastening a spray valve to the can neck of the raw can. This means that the can can later be used as an aerosol can.
  • the method can also include a step e) filling the can with a liquid or a semi-liquid medium, in particular a hairspray, a deodorant, a shaving cream, a paint, a paint, a varnish, a varnish, a furniture polish, an oil, a liquid soap , a resin, a paraffin, a liquid wax, natural rubber, a glue, a disinfectant, an impregnating agent, a cleaning agent, an organic liquid, an inorganic liquid, a liquid / semi-liquid food such as spray cream, a liquid / semi-liquid cosmetic product such as a liquid / semi-liquid personal care product or a liquid / semi-liquid pharmaceutical product.
  • a liquid or a semi-liquid medium in particular a hairspray, a deodorant, a shaving cream, a paint, a paint, a varnish, a varnish, a furniture polish, an oil, a liquid soap , a resin, a paraffin, a liquid wax, natural rubber,
  • the method can further comprise a step f) attaching a hand pump, a spray head or a valve to the can neck of the can.
  • the method can further comprise a step g) packaging the can.
  • the invention relates to the use of an aluminum alloy according to the first aspect of the invention for producing a semi-finished product, preferably a slug, or a can, preferably an aerosol can.
  • An aerosol can according to the invention was produced using an aluminum alloy (alloy H) according to the invention as listed in Table 1 below.
  • Aerosol cans which were produced using alloys D, E and EN AW-3207, as also listed in Table 1 below, were used as comparison cans.
  • the comparative alloy D magnesium was only contained in traces (as an impurity).
  • the comparative alloy E contained practically no copper and magnesium, but chromium.
  • the alloy EN AW-3207 was used as the third comparison alloy.
  • Tabel e 2 variation of the parameters of heat treatment and cooling during slug production
  • raw cans with an average length of approx. 19 cm and a wall thickness of 0.24 mm in were turned into a toggle press using the reverse extrusion process produced lower area and 0.36 mm in the upper area.
  • the raw cans were cut to a uniform length of 17.4 cm and the outer surface brushed.
  • the raw cans were then cleaned of grinding dust and lubricant by a washing step and a subsequent drying step at 125 ° C.
  • an inner lacquer based on epoxy resin was applied by spraying and the inner lacquer was then baked in an oven at a maximum of 240 ° C. for 7 min.
  • the cans were finalized by applying a three-stage outer coating (base coat, printing and top coat) and a conification step. To determine the strength, samples were taken from the raw cans and the cans after interior painting and drying (DIT). The samples were prepared in accordance with DIN 50125-H 12.5 x 68. The tests for determining the tensile strength were carried out using a Zwick Roell Z010 testing machine in accordance with the DIN EN ISO 6892-1 standard.
  • Table 3 an aerosol can according to the invention with reference aerosol cans

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un alliage d'aluminium comprenant : -0,07 à 0,17 % en poids de silicium, -0,25 à 0,45 % en poids de fer, -0,05 à 0,20 % en poids de cuivre, -0,30 à 0,50 % en poids de manganèse, -0,05 à 0,25 % en poids de magnésium, -0,01 à 0,04 % en poids de titane et le restant de l'aluminium, ainsi que d'éventuelles substances ajoutées. L'invention concerne par ailleurs une pastille ou une boîte, de préférence une bombe aérosol, un procédé de fabrication d'un produit semi-fini, de préférence d'une pastille, un procédé de fabrication d'une boîte et une utilisation d'un alliage d'aluminium.
EP19765436.1A 2018-09-07 2019-09-03 Alliage d'aluminium, produit semi-fini, procédé pour fabriquer une pastille, procédé pour fabriquer une boîte et utilisation d'un alliage d'aluminium Active EP3847291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018215254.3A DE102018215254A1 (de) 2018-09-07 2018-09-07 Aluminiumlegierung, Halbzeug, Dose, Verfahren zur Herstellung eines Butzen, Verfahren zur Herstellung einer Dose sowie Verwendung einer Aluminiumlegierung
PCT/EP2019/073480 WO2020048994A1 (fr) 2018-09-07 2019-09-03 Alliage d'aluminium, produit semi-fini, procédé pour fabriquer une pastille, procédé pour fabriquer une boîte et utilisation d'un alliage d'aluminium

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EP3847291A1 true EP3847291A1 (fr) 2021-07-14
EP3847291B1 EP3847291B1 (fr) 2023-01-18

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US (1) US20210340648A1 (fr)
EP (1) EP3847291B1 (fr)
CN (1) CN112771195B (fr)
BR (1) BR112021003355A2 (fr)
DE (1) DE102018215254A1 (fr)
WO (1) WO2020048994A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP3940100A1 (fr) 2020-07-16 2022-01-19 Envases Metalúrgicos De Álava, S.A. Alliages d'aluminium pour la fabrication de boîtes d'aluminium par extrusion par percussion
EP3940098A1 (fr) 2020-07-16 2022-01-19 Envases Metalúrgicos De Álava, S.A. Alliages d'aluminium pour la fabrication de canettes d'aluminium par extrusion par percussion
EP3940099A1 (fr) 2020-07-16 2022-01-19 Envases Metalúrgicos De Álava, S.A. Alliages d'aluminium pour la fabrication de boîtes d'aluminium par extrusion par percussion
EP4130306A1 (fr) * 2021-08-04 2023-02-08 Aluminium-Werke Wutöschingen AG & Co.KG Procédé de fabrication d'une bande d'alliage à partir d'aluminium recyclé, procédé de fabrication d'une pastille à partir d'aluminium recyclé, et alliage à partir d'aluminium recyclé
CN114875279A (zh) * 2022-05-24 2022-08-09 龙口南山铝压延新材料有限公司 一种低制耳率小口径旋开瓶盖用铝合金带材及其制备方法

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FR2457328A1 (fr) * 1979-05-25 1980-12-19 Cebal Alliage d'aluminium de type a-gs
FR2707669B1 (fr) * 1993-07-16 1995-08-18 Pechiney Rhenalu Procédé de fabrication d'une feuille mince apte à la confection d'éléments constitutifs de boîtes.
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Publication number Publication date
BR112021003355A2 (pt) 2021-05-11
DE102018215254A1 (de) 2020-03-12
WO2020048994A1 (fr) 2020-03-12
CN112771195B (zh) 2022-10-04
US20210340648A1 (en) 2021-11-04
EP3847291B1 (fr) 2023-01-18
CN112771195A (zh) 2021-05-07

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