• 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:

    公开号:AT510271A4
    申请号:T0172310
    申请日:2010-10-15
    公开日:2012-03-15
    发明作者:Christian Dipl Ing Bratsch
    申请人:Xolution Gmbh；
    IPC主号:
    专利说明:

    - 1 - 15137
    The present invention relates to a process for the production of filled and resealable pressure vessels in which a container body with a cylindrical shell and bottom is filled with a liquid, then with a lid member is permanently closed and optionally subsequently subjected to a heat treatment, wherein for use as Cover element is a cover mirror, preferably made of metal, and a closure means made of plastic, the closure means is attached to a first surface of the lid mirror, and at least one arranged on the closure means seal with at least one arranged on the first surface of the lid mirror sealing surface is brought into abutment and, when the pressure vessel is closed, the lid element formed from the lid mirror and closure means is arranged such that the closure means faces the interior of the sealed pressure container.
    Pressure vessels of the type described above are produced, for example, as resealable beverage cans. In a particularly advantageous embodiment of such beverage cans is permanently provided in the lid mirror, which is like the rest of the can made of aluminum, an opening. This opening is closed by a closure means which rests inside the can on the lid mirror. This closure means carries, for example, an externally operable flap or a slide, which makes it possible to expose the opening for emptying the can and close again after first opening.
    After filling and closing, beverage cans are usually heat treated to ensure the required sterility by pasteurizing the contents of the can. The can is briefly exposed to a temperature of over 60 ° C, whereby the pressure inside increases to several bar. In this case, the can is naturally deformed, in particular, the lid mirror bulges outward. This curvature forms after cooling at least partially back. Similar effects can also be caused by unintentional heat treatment when the can is left behind, for example, in a motor vehicle and is temporarily exposed there to higher temperatures, which lead to a comparable pressure increase.
    The pressure increase is particularly critical at cans containing cohesive acid-containing beverages, but is less noticeable in the other products. - 2 -
    It has now been found that beverage cans can not be closed tightly after pasteurization and after the first opening. As a possible cause, a deformation occurring in the course of the heat treatment and after cooling only partially recessed, in particular of the closure means, was identified.
    Object of the present invention is to provide a method for producing a pressure vessel of the type described above, in particular a beverage can, in which the implementation of the required heat treatment has no negative impact on the reclosability and thus the tightness of the pressure vessel.
    This object is achieved by a method of the type mentioned above in that the cover mirror in at least a portion of a first distance from a first reference plane, which extends substantially through the at least one sealing surface on the first surface of the lid mirror, the closure means in at least a portion of a second distance from a second reference plane passing through the at least one seal, wherein the first distance is greater than the second distance is selected.
    Essential to the present invention is the fact that it is inevitable that the closure means and cover mirror deform during the heat treatment by the resulting internal pressure to the outside. In this case, the closure means assumes the sealing function, while the lid mirror receives a large part of the pressure force, wherein the closure means is supported on the lid mirror. The deformation of the lid itself is largely elastic, i. The cover mirror returns without the appearance of other external forces after the end of the load, ie when cooling back to its original position. However, the closure made of plastic suffers plastic deformation to some extent under elevated temperature loading. at least a part of the curvature impressed by the internal pressure remains after elimination of the pressure load. This means that a closure means, which is aligned before the heat treatment parallel to the lid mirror and rests close to this, after the heat treatment at its edge has a distance from the lid mirror. The consequence of this is that, when the pressure vessel is reclosed, the closure means no longer seals the opening sufficiently tightly due to its deformation and the contents of the pressure vessel may possibly escape. The inventive construction, however, the difference in the deformation behavior of the cover mirror and closure means is compensated for and ideally in that the plastic deformation of the closure means corresponds exactly to the additional - 3 - additional curvature of the lid mirror relative to the closure means.
    In a preferred embodiment of the invention, the closure means is substantially circular, wherein the at least one seal is arranged in the peripheral region, and when fastening the closure means on the lid mirror, the closure means a majority of the first surface of the lid mirror after closing the pressure vessel against the interior of the pressure vessel seals. The closure means is substantially disc-shaped and usually made similar in size as the lid mirror. It typically carries at the edge of a seal, with which it is sealed against the lid mirror. It can also be provided that the seal is an integral part of the closure means, that is, for example, the closure means is produced by means of two-component injection molding technology.
    Particularly preferably, it is provided that the central region of the cover mirror has the maximum first distance to the first reference plane, wherein the cover mirror is provided before its connection with the closure means with an outwardly convex curvature, which is an elevation of the central region relative to the edge in a region between 1% and 5%, preferably between 2% and 3% of the diameter of the lid mirror results.
    When the closure means are fastened to the first surface of the lid mirror, a part of the closure means is arranged at a distance from the lid mirror, this spacing being reduced in the course of a heat treatment carried out after closing the pressure container. The distance between the lid mirror and closure means in the region of the center of the lid mirror and closure means corresponds to the difference between the plastic deformation of the lid mirror or of the closure means in the course of the heat treatment.
    Furthermore, the present invention also relates to a pressure vessel having a container body with a cylindrical shell and bottom for receiving a liquid and having a lid member which is permanently connected to the shell, wherein the lid member consists of a lid mirror made of sheet metal, on the inside of a closure means is mounted from plastic, which rests on a large part of the surface of the lid mirror on this and which is sealed at its periphery relative to the lid mirror, and the lid mirror is bent immediately after production of the pressure vessel when mounting against the disc-shaped closure means to the outside, so that in the area the center of lid mirror and closure means is a distance - 4 - between them, which preferably reduces in the course of a heat treatment.
    In the following, the invention will be explained in more detail with reference to a non-limiting embodiment with associated figures. Show here
    Figs. 1a to 1c, a cover element according to the prior art before, during and after the heat treatment,
    Fig. 2 shows an inventive cover element prior to attachment of the
    Closure means on the lid mirror and
    Figs. 3a to 3c, the inventive cover element of Fig. 2 in the mounted state before, during and after the heat treatment in a sectional view.
    The figure la shows the cover member 10 of a pressure vessel, in particular a beverage can according to the prior art, wherein a ceiling cover 11, which is usually made of aluminum sheet or the like, via a bead 12 is in communication with the container wall 13 of the pressure vessel.
    At the bottom of the lid mirror 11, a closure means 14 made of plastic, for example polypropylene (PP) is arranged. This closure means 14 has the task of tightly sealing a arranged in the lid mirror 11 drinking opening 15 in the closed state of the pressure vessel by means of a circumferentially arranged seal 16. In this case, the seal 16 bears against a sealing surface 16a on the inside of the lid mirror 11. The pressure vessel shown in Figure la was not subjected to any heat treatment.
    In the figure lb, the lid member 10 is shown in the figure la, while it is subjected to a heat treatment. It can be clearly seen that the lid mirror 11 as well as the closure means 14 bulge outwardly due to the pressure prevailing in the pressure vessel. As already mentioned, this pressure increase may also occur for other reasons, for example when the pressure vessel is exposed to sunlight for a long time or generally because of the storage.
    After reducing the pressure prevailing in the pressure vessel, for example after completion of a heat treatment (Figure lc) or by (initial) opening of the pressure vessel, the lid mirror 11 returns to its initial position (according to FIG. This provision of the lid mirror is due to its elastic properties. By contrast, the closure means 14 has undergone a permanent deformation in the form of a bulge with a height w1, so that a gap 17 has formed in the region of the seal 16, in particular in the edge area between the lid mirror 11 and closure means 14. However, this gap 17, which does not necessarily occur completely, causes a reduction until the sealing effect of the closure means 14 is removed in cooperation with the lid mirror 11, so that the contents of the pressure container closed by the closure means 14 can possibly escape via the drinking opening 15.
    In contrast, the cover element 100 according to the invention has a cover mirror 110 which has a curvature towards the outside (FIG. 2). This curvature is defined by a first distance al of the cover mirror 110 from a reference plane El, which extends essentially through the sealing surface 16a. The closure means 14 is executed in this embodiment of the invention as in the prior art according to the figure la substantially planar.
    In the mounted state (FIG. 3 a), the bulged cover mirror 110 and the substantially planar closure means 14 are arranged at a maximum distance a 2 from each other in the middle region of the cover mirror 110 and closure means 14, while the seal 16 seals the region 111 of the drinking opening 15 against the container interior.
    If this cover element 100 according to the invention is then subjected to a heat treatment (FIG. 3 b), the closure means 14 is again bulged together with the cover mirror 110 due to the increased internal pressure so that the upper side 141 (FIG. 2) of the closure means 14 is pressed against the underside of the cover mirror 110 , This is shown in particular in FIG. 3b.
    After completion of the heat treatment, the closure means 14 remains due to its permanent deformation arranged at a substantially regular distance on the lid mirror 110, so that no heat gap after the heat treatment 17 as noted in the prior art occurs and the pressure vessel reliably sealed liquid-tight and gas-tight again remains. Optimally, the curvature of the cover mirror 110 or the distance a2 when connecting the cover mirror 110 with the closure means 14 is selected such that this distance a2 substantially corresponds to the height wl of the deformation of the closure means 14 after the heat treatment.
    In the present embodiment of the invention it is provided that the closure means is made substantially flat. Likewise, in the present invention alternatively closure means are used which already have a curvature prior to connection to the lid mirror, the second distance being defined as the distance between the point of the highest curvature of the lower edge of the closure means and a second second reference plane, which corresponds to the level of a (fictitious) pad, on which the closure means 14 rests extends. In this case, this point does not necessarily have to be in the middle region of the closure element. With a flat closure means this distance is equal to zero.
    It is understood that the invention is not limited to the above-described embodiments. Thus, the closure medium and consequently the seal is not necessarily circular with a diameter substantially corresponding to the diameter of the ceiling mirror diameter, but may, for example, also be elongated with appropriate seal to the outlet opening of the pressure vessel liquid-tight or gas-tight (re-close. Likewise, the actuation of the closure means from the outside can be done in a variety of ways, for example by means of slide, by turning or tilting a trigger element, etc.
    权利要求:
    Claims (5)
    [1]
    1. A process for the production of filled and resealable pressure vessels in which a container body with a cylindrical jacket (13) and bottom is filled with a liquid, then with a cover element (10, 100) is permanently closed and, if necessary, subsequently is subjected to a heat treatment, wherein for use as cover element (10, 100) a cover mirror (11, 110), preferably made of metal, as well as a closure means (14) made of plastic, the closure means (14) on a first surface (111) the lid (11, 110) is fastened, and at least one seal (16) arranged on the closure means (14) is brought into abutment with at least one sealing surface (16a) arranged on the first surface (111) of the lid mirror (11, 110) , and upon closure of the pressure vessel, the cover element (10, 100) formed from cover mirror (10, 110) and closure means (14) in such a way is arranged, that the closure means (14) facing the interior of the sealed pressure vessel, characterized in that the lid mirror (11, 110) in at least a partial area a first distance (al) from a first reference plane (El), by the at least a sealing surface (16a) extends on the first surface (111) of the cover mirror (11, 110), the closure means (14) in at least a partial region a second distance from a second reference plane passing through the at least one seal (16) , wherein the first distance (al) is selected to be greater than the second distance.
    [2]
    2. The method according to claim 1, characterized in that the closure means (14) is designed substantially circular, wherein the at least one seal (16) is arranged in the peripheral region, and when fastening the closure means (14) on the cover mirror (110) the closure means (14) seals a majority of the first surface (111) of the lid (110) after closing the pressure vessel against the interior of the pressure vessel.
    [3]
    3. The method according to claim 1 or 2, characterized in that the central region of the lid mirror (110) has the maximum first distance (al) to the first reference plane (El), wherein the lid mirror (110) - 8 - before its connection to the Closing means (14) is provided with an outwardly convex curvature, which results in an increase of the central region relative to the edge in a range between 1% and 5%, preferably between 2% and 3% of the diameter of the lid mirror (110).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that when fastening the closure means (14) on the first surface (111) of the lid mirror (110) a part of the closure means (14) spaced from the lid mirror (110) is arranged , wherein this third distance (a3) decreases in the course of a heat treatment performed after closing the pressure vessel.
    [5]
    5. pressure vessel, comprising a container body with a cylindrical jacket (13) and a bottom for receiving a liquid and with a cover element (10, 100) which is inextricably connected to the jacket (13), wherein the cover element (10, 100) a lid mirror (11, 110) made of sheet metal, on whose inside a closure means (14) made of plastic is attached, which rests on a large part of the surface of the lid mirror (11, 110) on this and at its periphery relative to the lid mirror (11 , 110) is sealed, characterized in that the lid mirror (11, 110) immediately after the preparation of the pressure vessel during mounting against the closure means (14) is curved outwards, so preferably in the region of the center of the lid mirror (11, 110) and Closing means (14) is a distance (a2) between them.

    2010 10 15 Ha
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    EP2627573B1|2017-12-06|
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    引用文献:
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    DE102008060995A1|2008-12-09|2010-06-10|West Pharmaceutical Services Deutschland Gmbh & Co. Kg|Closure for a medicine container|
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    法律状态:
    优先权:
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    MX2013004102A| MX2013004102A|2010-10-15|2011-10-14|A method for producing filled and reclosable pressure vessels.|
    RU2013122116/12A| RU2013122116A|2010-10-15|2011-10-14|METHOD FOR PRODUCING A FILLED AND REPEATEDLY CLOSED HIGH PRESSURE CAPACITY|
    KR1020137012554A| KR20130108390A|2010-10-15|2011-10-14|A method for producing filled and reclosable pressure vessels|
    JP2013533227A| JP2013542892A|2010-10-15|2011-10-14|Method for manufacturing a fillable and resealable pressure vessel|
    PL11770422T| PL2627573T3|2010-10-15|2011-10-14|A method for producing filled and reclosable pressure vessels|
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