• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The method comprises: a) the supply of an aluminum alloy strip or sheet, known to those skilled in the art under the name of "textured" strip or sheet, typically coated on at least one of its two faces, generally the face intended inside the capsule, a layer of stamping varnish, b) a first cutting operation in discs called blanks, c) a stamping step, in one or more passes, said blank metal, typically using a stamping lubricant, so as to form a stamped blank, comprising a head and a skirt, typically axisymmetric in an axial direction, d) a step of degreasing said pressed blank, intended to typically remove the lubricant residues, to form a defatted preform to be lacquered, e) a possible step of varnishing protection and decoration, and is characterized in that it comprises, after the step of stamping, and before that of lacquering, at least one stretching step of passing the stamped blank by drawing rings to elongate the metal and thin it. The invention also relates to a closure capsule thus produced. Advantages: the textured appearance is retained the entire surface of the capsule head, while a smooth or shiny appearance is obtained over the entire height of the skirt or capsule wall.
    公开号:FR3025505A1
    申请号:FR1401986
    申请日:2014-09-05
    公开日:2016-03-11
    发明作者:Laurent Laszczyk；Christian Delclos
    申请人:Constellium France SAS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The invention relates to the field of closure caps comprising an outer metal shell of aluminum alloy and in particular screw caps which comprise an inner insert typically made of plastic and threaded. These capsules are intended for capping containers, mainly glass bottles containing alcoholic beverages and especially wine or spirits. The invention relates more particularly to a method of manufacturing these capsules to obtain a textured appearance on the top, or head, and smooth or shiny on the "vertical" wall or skirt of the outside of the capsule.
    [0002] State of the art The aluminum alloy closure caps are typically manufactured as follows: - A stamping press forms blanks of capsules from a strip or sheet also called format, cut into blanks, varnish on both sides, typical thickness ranging from 0.15 to 0.25 mm without taking into account the varnish. Depending on the height of the skirt (length of the capsule blank), one to three stamping passes may be required. These blanks are defatted in an oven at high temperature, typically 180 to 210 ° C, for a period of time ranging from 3 to 5 minutes, in order to eliminate the drawing lubricant. - They are then lacquered on their entire outer surface and are put in an oven to cook the lacquer. These lacquered blanks are printed on the skirt, typically in screen printing, a process known to those skilled in the art as "Offset", with final drying of the inks in an oven. 3025505 2 - An overprint varnish is finally applied in order to protect the printing, said varnish being dried during a passage in an oven. - The blank thus obtained is provided with a seal and / or a threaded inner plastic insert. It should be noted that all the aluminum alloys referred to below are designated, unless otherwise indicated, in the designations defined by the "Aluminum Association" in the "Registration Record Series" which it publishes regularly. Problem The increasing interest in aesthetic solutions has led the Applicant to test the use of aluminum alloy strips known to those skilled in the art as "textured" tape or sheet, that is, that is to say having recessed or raised patterns, typically but not exclusively lines in one or more directions, imparting a roughness Ra, measured according to the NF EN ISO 4287 standard, typically greater than 0.5 or even 1.0 gin, for the stamping of the blanks of capsules. This type of surface is well known to those skilled in the art and described in particular in the applications WO 9731783 A1, GB 234588 A, WO 9508408 A1, WO 9731783 A1, US 5857373, US 6920632, EP 0273402 A1 or EP 0456162 A1. , CA 2412980 A1, CA 2478648 A1, EP 1368140 A1 etc ... However, after the stamping, if the quality of the texture remains substantially unchanged on the head of the blank, it is very degraded and unsightly on the skirt due in particular to the deformation of (or) texture patterns during said stamping.
    [0003] The valorization of the textured appearance of the initial metal (special grades made by rolling to give a textured and / or iridescent effect on the surface of the metal), is thus made impossible. No industrially viable solution is known to date for producing textured capsules, either wholly, on the skirt and the top, or even partially, or on the top only, because of the aforementioned degradation of the skirt.
    [0004] The invention aims to solve this problem by proposing a method that retains the initial textured appearance over the entire surface of the head of the blank, and smooth or shine over the entire height of the skirt, and this under industrial conditions. economic for the bottle closure bottle market.
    [0005] OBJECT OF THE INVENTION The invention relates to a method of manufacturing metal closure caps comprising: a) supplying a strip or sheet of aluminum alloy, known to those skilled in the art under the name of strip or "textured" sheet, that is to say having hollow or raised patterns, typically but not exclusively lines in one or more directions, imparting a roughness Ra, measured according to the NF EN standard ISO 4287, typically greater than 0.5 or 1.0 mm for stamping, typically coated on at least one of its two faces, generally the face intended for the interior of the capsule, with a layer of lacquerable lacquer, that is to say which does not undergo any deterioration during stamping, b) a first cutting operation in disks called blanks, c) a stamping and cutting step of the horns of anisotropy, in one or more 20 passes, of said blank metal, typical with a drawing lubricant, so as to form a stamped blank, comprising a head and a skirt, typically axisymmetric in an axial direction, d) a step of degreasing, thermal, typically at a temperature of 180 at 210 ° C, for a time of 3 to 5 minutes, or chemical in an alkaline medium, of said pressed blank 25, intended to typically remove the lubricant residues, to form a defatted blank possibly to be varnished, e) a step possible protective varnish and / or decoration, and characterized in that it comprises, after optionally chained directly with the drawing step, at least one drawing step of passing the stamped blank 30 by minus a stretching ring to lengthen the metal and thin it.
    [0006] Typically, the blank has a thickness of 0.15 to 0.25 mm without taking into account the varnish. According to the most common mode, the draw ratio (1- final thickness / initial thickness of the sheet or strip) is greater than or equal to 2.5%.
    [0007] In a preferred embodiment, it is less than or equal to 30%. According to a particular embodiment, only the face intended for the inside of the capsule is coated with a varnish before stamping and the face intended for the outside of the capsule is only after the degreasing step. In another embodiment, the two faces for the inside and outside of the capsule 10 are coated with a varnish before stamping. Advantageously, the lubricant used for stamping is volatile and removed by heating. The same applies to the lubricant used for the drawing, which advantageously is volatile and removed by heating, typically in a passage oven or in an oven.
    [0008] In addition, the same lubricant can be used for both the drawing and drawing steps. Advantageously, the drawing and stretching steps are chained in two integrated steps, that is to say without any intermediate step and even more advantageously, they are carried out in one and the same press stroke.
    [0009] Finally, the aluminum alloy may be, but not exclusively, AA3105 or AA8011. The invention also relates to a metal closure cap manufactured by the method having one of the preceding features, and characterized in that it has a so-called "textured" appearance on the entire surface of the head or top, and a smooth or shiny appearance over the entire height of the skirt, or wall. DESCRIPTION OF THE FIGURES FIG. 1 is a diagrammatic section of the capsule used for the tests. Its diameter is 33 mm, its height H is 24 mm after stamping, 20 mm after cutting the horns of anisotropy and finally 28 mm after stretching, its top or 3025505 5 head or "high" is flat and is connected to the skirt or vertical wall A with a radius R of 5 mm. FIG. 2 shows, from left to right, the top of a textured capsule of patterns in 5 parallel lines after stamping and drawing according to the invention, a view of the skirt of the same capsule after stamping and finally a view of the skirt of the same capsule after stamping and stretching where the textured appearance has disappeared to give way to a smooth or shiny appearance.
    [0010] Figure 3 shows, from left to right, the top of a textured capsule of patterns in perpendicular lines and a view of the skirt of the same capsule after stamping and stretching where the textured appearance has disappeared to give new room to a smooth or shiny appearance.
    [0011] FIG. 4 shows the roughness Ra in microns, measured in the long direction from top to bottom of the wall, for: The starting sheets, or formats, marked A, shiny or smooth (reference 0), and textured according to different patterns 1, 2 or 3, the capsules only stamped, marked B, obtained from the formats 0, 1, 2 and 20 3 above, the measurement being performed on the skirt, from top to bottom of the wall, the capsules stamped and stretched , marked C, also obtained from formats and capsules B marked 0, 1, 2 and 3 above, the measurement being always performed on the skirt, 15 mm from the head of the capsule.
    [0012] DESCRIPTION OF THE INVENTION As previously mentioned, owing to a growing market interest in aesthetic but economical closure caps, ie at a cost compatible with the requirement of the beverage bottle market. and not that of cosmetics, the plaintiff had the idea to test the use of aluminum alloy strips known to those skilled in the art under the name of strip or sheet 3025505 6 "textured", c ' that is to say having patterns in recesses or reliefs, typically but not exclusively lines in one or more directions, conferring a roughness Ra, measured according to the NF EN ISO 4287 standard, typically greater than 0.5 or even 1.0 for stamping blanks of capsules.
    [0013] 5 However, it found that after the stamping, if the quality of the texture remained unchanged on the head or top of the blank, it was very degraded and unsightly on the skirt due to the deformation of the (or patterns) texture during said embossing in addition to it has on the latter a more or less matte appearance. At the same time, the plaintiff had engaged in a program for reducing the thickness of said closure caps to minimize the amount of metal used. It has thus arrived to proceed to an additional stretching pass after the conventional stamping in one or more passes, the latter leading to a non-uniform skirt thickness which could therefore be optimized to a minimum. This type of stretching, still known as "sizing", is not used in the field of capping capsules and is only used today in cans or bottles-drinks. During tests using so-called "textured" metal, it then unexpectedly found that said texture was preserved on the head, or vertex, of the capsule but completely erased, at the end of said step, on the wall or skirt, while the aforementioned "matte" appearance was improved to a smooth or shiny appearance. The interest of the invention was therefore multiple: uniformize the thickness of the skirt over its entire height by minimizing the amount of material used, or by allowing the manufacture of higher capsules without increasing the amount of material and, finally, obtain an aesthetic effect with a textured appearance on the top or head and smooth or shiny on the skirt or capsule wall. The minimum rate of stretching is justified by the fact that the latter must at least bring the thickness of the entire skirt substantially uniformly to the value of the minimum thickness locally obtained after stamping (ie 0.203 mm in the case of Figure 1). The latter depends on the conditions of stamping (roughness of the tool, play, clamping pressure, lubrication). This minimum rate is generally considered to be 2.5 or even 3%.
    [0014] 3025505 7 The maximum draw ratio is related to the limit of stretch before rupture, intrinsic to the alloy, which must not be exceeded during the stretching, or calibration, of the bottom of the skirt, the thickest zone (0.236 mm according to Figure 1). Its value "game ,. Is given by the formula (1- fasting) / (1-LIR) = e, n / einit) where LIR is the stretch limit of the metal, 5 emax is the maximum thickness of bottom of skirt (0.236 mm according to Figure 1) and einit the initial thickness of the sheet (0.210 mm in the case corresponding to Figure 1). In the case of an alloy of the AA3104 or 3105 type, the industrially acceptable stretching limit is 40%. A maximum draw ratio of approximately 30% is then obtained.
    [0015] In its details, the invention will be better understood with the aid of the following examples, which, however, are not limiting in nature. Embodiments Embossing Step Alloy metal strips of AA8011 type known to those skilled in the art under the name of "textured" strip, with a roughness Ra of 0.5 μm to 2.0 μm, in thickness 0.210 mm (without varnish), were cut to 210 x 75 mm.
    [0016] The first stamping pass was carried out on these unvarnished blanks with the following characteristic tools: Diameter of the cutting ring: 64 mm, punch diameter: 33 mm, punch radius: 5 mm, a ratio of stamping Re = 0 blank / 0 punch of 1.94. The diameter of the matrix was 33.68 mm and its radius 2.5 mm.
    [0017] The roughness of the surface of the matrix in contact with the metal was Ra = 0.2. The lubricant was of the type known as KLÜBERFOOD NH1 16-180. The blanking pressure was adjusted to obtain a cup without creases. This step made it possible to manufacture cups or capsules as schematically represented in section in FIG. 1, and marked B in FIG.
    [0018] Drawing Step 3025505 8 The second stretching pass was made on the cups previously stamped according to step 1 above, with the following feature tools: Punch diameter: 33 mm 5 Ring diameter 28.6% draw: 33.30 mm The diameter of the drawing rings corresponds to a negative clearance with respect to the initial thickness (here metal thickness = 0.210 mm) of metal between the diameters of the punch and the matrix and calculates as follows: O Ring stretching = O Hallmark + (2 x metal thickness x (1 - clearance%)) 10 set% being the draw ratio, here 28.6%, ie 0.286 The same lubricant as for the The stamping step, KLÜBERFOOD NH1 16-180, has been used successfully whether it is pure or diluted with 80% water. This step made it possible to manufacture drawn stretched capsules according to the invention, referenced C in FIG.
    [0019] Results of the tests: The surface roughness Ra was used to quantify the criterion of brightness, the latter being all the brighter so that the surface is smooth and therefore the roughness is low.
    [0020] The roughness of the capsule, stamped and stretched according to the invention, was compared with the roughness of the capsule only stamped (according to the prior art), and finally with the initial roughness of the metal in strip or sheet or starting format. flat, before shaping the capsule.
    [0021] The roughness was measured on the flat formats and on the wall or skirt of the capsules from top to bottom of the wall. The following codes are used: A: flat format, B: stamped capsule, 30 C: capsule stamped and stretched according to the invention. With regard to the surface states: 3025505 9 0 for the absence of texture, ie a glossy or smooth surface, 1 and 2 textures in parallel lines and 3 for two beams of parallel lines crossed at 90 °. Figure 2 shows a capsule stamped in the center and two capsules stamped and stretched on both sides, with the texture 2.
    [0022] FIG. 4 compares the roughness of the flat format A with the walls or skirts of the capsules A of the prior art and with those of the capsules C according to the invention. It clearly shows that the invention makes it possible to divide the roughness of the wall by a factor of two to eight.
    [0023] It shows just as clearly, by comparison between the capsules (A, B) and (C, D), that on the top (or top) of the capsule, the roughness is unchanged, i.e. the invention does not change the brightness of the top of the capsule. It is greater than the initial roughness of the shiny metal, but remains less than the roughness of a rough milling metal of the type called "Mill Finish".
    [0024] This point demonstrates the advantage of using as a starting metal a shiny metal to make the best of the initial gloss on the top of the capsule and obtain, by stretching, an improved gloss on the whole, including the skirt. or wall. These results are also identical for all the usual criteria for 2D or 3D roughness measurement (Rz, or Sk for example). 20 25 30
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. A method of manufacturing metal closure caps comprising: a) supplying a strip or sheet, of aluminum alloy known to those skilled in the art under the name of strip or "textured" sheet, typically coated on to at least one of its two faces, generally the face intended inside the capsule, of a layer of lacquerable lacquer, b) a first cutting operation in disks called blanks, c) a stamping step and cutting anisotropic horns, in one or more passes, of said blank metal, typically using a drawing lubricant, so as to form a stamped blank, comprising a head and a skirt, typically axisymmetric according to a axial direction, d) a step of degreasing said stamped blank, intended to typically remove the residues of lubricant, to form a defatted blank possibly to be varnished, e) a possible step of varnishing protection and / or decoration, and characterized in that it comprises, after the drawing step, at least one drawing step of passing the stamped blank through at least one drawing ring in order to lengthen the metal and thin it.
    [0002]
    2. Method according to claim 1 characterized in that the blank has a thickness of 0.15 to 0.25 mm without varnish.
    [0003]
    3. Method according to any one of claims 1 or 2 characterized in that the draw ratio (1- final thickness / initial thickness) is greater than or equal to 2.5%.
    [0004]
    4. Method according to any one of claims 1 to 3 characterized in that the drawing ratio is less than or equal to 30%. 3025505 11
    [0005]
    5. Method according to any one of claims 1 to 4 characterized in that only the face for the inside of the capsule is coated with a varnish before stamping and the face for the outside of the capsule does not is after the degreasing step. 5
    [0006]
    6. Method according to any one of claims 1 to 4 characterized in that the two faces for the inside and outside of the capsule are coated with a varnish before stamping.
    [0007]
    7. Method according to any one of claims 1 to 6 characterized in that the lubricant used for stamping is volatile and removed by heating.
    [0008]
    8. Method according to any one of claims 1 to 7 characterized in that the lubricant used for stretching is volatile and removed by heating. 15
    [0009]
    9. Method according to any one of claims 1 to 8 characterized in that the same lubricant is used for the two steps of drawing and drawing.
    [0010]
    10. Method according to any one of claims 1 to 9 characterized in that the drawing and stretching steps are chained in two integrated steps, that is to say 20 without further intermediate step.
    [0011]
    11. Method according to any one of claims 1 to 10 characterized in that the drawing and drawing steps are performed in one and the same press stroke. 25
    [0012]
    12. Method according to any one of claims 1 to 11 characterized in that the aluminum alloy is AA3105 type.
    [0013]
    13. Process according to any one of Claims 1 to 11, characterized in that the aluminum alloy is of the AA8011 type. 3025505 12
    [0014]
    14. Metal capping capsule manufactured by the method according to one of claims 1 to 13, characterized in that it has a so-called "textured" appearance on the entire surface of the head or top, and a smooth or shiny appearance on the full height of the skirt, or wall. 5
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    同族专利:
    公开号 | 公开日
    EP3188855A1|2017-07-12|
    WO2016034813A1|2016-03-10|
    CN106687231A|2017-05-17|
    FR3025505B1|2019-03-22|
    RU2693976C2|2019-07-08|
    CN106687231B|2019-04-26|
    US20170283126A1|2017-10-05|
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    RU2017111041A|2018-10-05|
    US10787295B2|2020-09-29|
    JP6649365B2|2020-02-19|
    JP2017529243A|2017-10-05|
    EP3188855B1|2018-06-06|
    AR101769A1|2017-01-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    FR2792617A1|1999-04-20|2000-10-27|Pechiney Emballage Alimentaire|Composite screw cap for bottle containing alcoholic drink has plastic insert fulfilling all technical functions and decorative outer cover|
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    JPH035891B2|1983-05-28|1991-01-28|Katsushika Puresu Kogyosho Kk|
    US4978583A|1986-12-25|1990-12-18|Kawasaki Steel Corporation|Patterned metal plate and production thereof|
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    US5025547A|1990-05-07|1991-06-25|Aluminum Company Of America|Method of providing textures on material by rolling|
    AU7661494A|1993-09-21|1995-04-10|Alcan International Limited|Aluminium sheet with rough surface|
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    JP5064643B2|2001-03-12|2012-10-31|ノベリス・インコーポレイテッド|Method and apparatus for forming an embossed pattern on a metal sheet or strip|
    ITRM20010616A1|2001-10-17|2003-04-17|Italcoat S R L|PRODUCTION PROCESS OF POLISHED SEMI-FINISHED TAPES.|
    EP1317972A1|2001-12-05|2003-06-11|Alcan Technology & Management AG|Method for ameliorating the adhesion of grease on the surface of an aluminium strip|
    EP1344580A1|2002-03-12|2003-09-17|Alcan Technology & Management Ltd.|Method and plant for producing a texturized aluminium strip|
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    JP4525908B2|2004-08-31|2010-08-18|株式会社吉野工業所|Method for manufacturing container cap, and container cap|
    JP2006272424A|2005-03-30|2006-10-12|Showa Aluminum Kan Kk|Bottle-shaped can manufacturing method and bottle-shaped can manufactured thereby|
    RU2418646C1|2009-10-12|2011-05-20|Федеральное государственное унитарное предприятие "Муромский приборостроительный завод" |Method of producing hollow articles|
    CN102728709B|2012-07-25|2015-07-08|四川省隆鑫科技包装有限公司|Method for machining anti-fake aluminum cover and drawing mold|
    CN103978121A|2014-05-06|2014-08-13|北京爱创科技股份有限公司|Manufacturing technology of metal anti-counterfeiting bottle cap and metal anti-counterfeiting bottle cover|WO2020225288A1|2019-05-09|2020-11-12|Constelllium Rolled Products Singen Gmbh & Co.Kg|Method for manufacturing long metal stopper caps comprising a skirt having a constant thickness|
    FR3095769B1|2019-05-09|2021-06-11|Constellium Rolled Products Singen Gmbh & Co Kg|A method of manufacturing long metal stopper caps comprising a skirt having a constant thickness|
    EP3750647B1|2019-06-14|2021-10-13|Saeta GmbH & Co. KG|A method for forming a deep draw closure cap|
    CN111360145A|2020-02-17|2020-07-03|中南大学|Electric pulse auxiliary micro-stretching process for superfine crystal metal foil|
    法律状态:
    2015-09-17| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-11| PLSC| Publication of the preliminary search report|Effective date: 20160311 |
    2016-09-26| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-01| TP| Transmission of property|Owner name: CONSTELLIUM NEUF-BRISACH, FR Effective date: 20170728 |
    2017-09-25| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-25| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-25| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-25| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-27| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1401986A|FR3025505B1|2014-09-05|2014-09-05|PROCESS FOR MANUFACTURING TEXTURED-SMOOTH MIXED METAL CAPSULE CAPSULES|
    FR1401986|2014-09-05|FR1401986A| FR3025505B1|2014-09-05|2014-09-05|PROCESS FOR MANUFACTURING TEXTURED-SMOOTH MIXED METAL CAPSULE CAPSULES|
    CN201580047728.2A| CN106687231B|2014-09-05|2015-09-02|The method for manufacturing the smooth mixed metallic sealed cover of texture-|
    EP15766910.2A| EP3188855B1|2014-09-05|2015-09-02|Method of manufacturing textured - smooth hybrid metal closure caps|
    RU2017111041A| RU2693976C2|2014-09-05|2015-09-02|Method of producing combined smooth textured metal caps|
    US15/507,793| US10787295B2|2014-09-05|2015-09-02|Method of manufacturing textured-smooth hybrid metal closure caps|
    JP2017512664A| JP6649365B2|2014-09-05|2015-09-02|Method for producing a textured-smooth mixed metal closure cap|
    PCT/FR2015/052317| WO2016034813A1|2014-09-05|2015-09-02|Method of manufacturing textured - smooth hybrid metal closure caps|
    ARP150102840A| AR101769A1|2014-09-05|2015-09-04|MANUFACTURING PROCESS OF MIXED METAL CAPSULES TEXTURED-LISAS|
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