• 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:
    A plastic container (1) having a body and a bottom (3) extending from a lower end of the body, the bottom (3) comprising: - a peripheral seat (5) which defines a flat annular laying line (6) for the container (1); a concave arch (9) extending from the laying line (6) to the central zone (7); a series of beams (10) formed recess in the vault (9) and which radiate each from the central zone (7) to the seat (5), each beam (10) comprising a pair of grooves (11); ) which are formed hollow in the roof (9) and are separated by a radial rib (15) projecting from the bottoms (12) of the grooves (11).
    公开号:FR3022223A1
    申请号:FR1455406
    申请日:2014-06-13
    公开日:2015-12-18
    发明作者:Laurent Bouquin；Ivan Pierre
    申请人:Sidel Participations SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to the manufacture of containers, especially bottles or jars, obtained by blow molding or stretch blow molding from plastic blanks, such as polyethylene terephthalate (PET). The manufacture by blowing of a container usually consists in introducing into a mold to the imprint of the container a blank (a preform or an intermediate container obtained by pre-blowing a preform) previously heated to a temperature above the glass transition temperature of the material, and to inject into the blank a fluid (in particular a gas such as air) under pressure. The blowing can be completed by preliminary stretching of the blank by means of a sliding rod.
    [0002] The double orientation or molecular biorientation (axial and radial, respectively parallel and perpendicular to the general axis of the container) that the material undergoes during blowing gives the container a certain structural rigidity. But the decrease, dictated by the market, the amount of material used for the manufacture of containers leads manufacturers to resort to manufacturing tips or form to stiffen their containers, biorientation is insufficient. It follows that with equal weight two containers do not necessarily have the same mechanical performance (strength, rigidity).
    [0003] A well-known method of increasing the stiffness of a container is heat-setting, which involves heating the mold wall to thermally increase the crystallinity level of the material. This process, illustrated by the French patent FR 2 649 035 (Sidel) and its US equivalent US 5,145,632, is used in particular for the HR applications (initials of the term "heat resistant", that is to say heat resistant), in which the container is hot filled. But, because of its cost and the reduction of rate it imposes, this type of process can not be generalized to ordinary applications of the type flat water. For these applications, the structural rigidity of the bottom depends essentially on its shape. It is known to stiffen the bottom by means of radial beams, cf. eg. French patent FR 2 753 435 (Sidel). This bottom retains its mechanical strength without turning as long as the conditions of volume and / or pressure in the container are normal, and for a sufficient mass of material (of the order of 8 to 10 g for a container of a capacity 0.5 l). A decrease in the mass of material (less than 8 g for a container with a capacity of 0.5 I) induces a decrease in the performance of this type of container. The risk is high, during palletizing, to see collapse some containers of the first floor of the pallet under the weight of the upper floors. It is known, to stiffen the side wall of the container and partially compensate for the reduction in the weight of material, to inject at the end of filling and before capping a drop of a liquefied inert gas (including nitrogen), which, during vaporization of the gas, puts the under-neck space (located between the liquid and the cap) under pressure (the relative pressure being of the order of 0.5 to 0.7 bar). However, this technique has the unwanted corollary of increasing the constraints on the substance (less than 2 g of material being allocated to it) and therefore increase in proportion the risk that it deforms of uncontrolled manner, to the detriment of the stability of the container.
    [0004] The objectives, for some contradictory (and preferably combined), are the following: lighten the container, improve its mechanical performance; maintain or improve its blowing ability (ie its ability to be formed by blowing) to allow low pressure blowing (less than or equal to about 20 bar); providing the container with a bottom offering good resistance to uncontrolled deformations (in particular to overturning), in particular under high internal pressure; - Offer the container a bottom that gives it a good stability, especially when the container is located at the first level of a pallet. For this purpose, there is provided a plastic container, provided with a body and a bottom that extends from a lower end of the body, the bottom comprising: a peripheral seat which defines a line of installation flat annular for the container; a concave arch that extends from the laying line to a central area; a series of beams formed recessed in the vault and which radiate each from the central zone to the seat, each beam comprising a pair of radial grooves which are hollowed out in the roof and are separated by a radial rib which is protrudes from the bottoms of the grooves.
    [0005] Equipped with such a bottom, this container offers excellent resistance to deformation caused by the pressure of the content, possibly doubled by axial compression due to palletizing. Various additional features may be provided, alone or in combination: the rib is delimited laterally by flanks forming fallen edges; the grooves of the pairs of grooves have in cross section a V-shaped profile; the radial rib has in cross section a U-shaped profile; - The radial rib has a width L, measured transversely, and a height H, such that their ratio L / H is between 0.5 and 2; each beam extends beyond the seat where it interrupts the laying line; the container comprises a pair of secondary ribs projecting from an outer radial end of the beam; the container further comprises a series of valleys formed recess in the vault, and which each extend between two beams, each valley radiating from the central zone to beyond the seat. Other objects and advantages of the invention will become apparent from the description of an embodiment, given hereinafter with reference to the accompanying drawings, in which: FIG. 1 is a perspective view from below of a container, in this case a bottle; Figure 2 is a perspective view from below, on an enlarged scale, of the bottom of the container of Figure 1, in another orientation; Figure 3 is a bottom view of the bottom of Figure 2; Figure 4 is a partial section of the bottom of Figure 3, according to the sectional plane IV-IV; Figures 5 and 6 are views in perspective, over and in two different orientations, the bottom of Figure 2, with medallions details on an enlarged scale.
    [0006] In Figure 1 is shown a container 1, in this case a bottle, made by stretching blow from a thermoplastic preform, for example PET (polyethylene terephthalate). In what follows, a non-planar zone is said to be concave when its center of curvature is situated outside the receptacle, that is to say when it has a hollow directed towards the outside of the receptacle 1. Inversely, a non-planar zone is said to be convex when the hollow of the zone is directed towards the interior of the container 1. The container 1 comprises a lateral wall or body 2, of generally cylindrical shape and extending along an axis X main container I. The container 1 comprises a bottom 3, which extends from a lower end of the body 2. At an opposite top end, the container further comprises a neck 4, provided with a rim. After filling with a pasty or liquid content, the container 1 is sealed by means of an attached cap, fixed on the neck 4 by screwing. The small amount of material allowed for the manufacture of the container 1 makes it vulnerable to crushing forces suffered during handling and packaging (especially during its palletization). Although the body 2 has the advantage of being annealed, as in the example shown in Figure 1, but this structure does not give the container 1 a sufficient strength. Between the plug and the contents persists a volume, called sub-neck volume, in which can be injected a gas to maintain the entire container 1 under pressure, so as to stiffen the body 2 and thus improve the mechanical strength of the container 1 during handling. This gas is for example nitrogen, and its injection can be carried out in liquid form by depositing a drop after filling and just before capping. This technique effectively stiffens the body 2 but increases the mechanical stresses to which the bottom 3, which it is therefore necessary to strengthen. The bottom 3 comprises a peripheral seat 5 in the form of an annular bead which extends substantially axially in the extension of the body 2.
    [0007] The seat 5 defines an annular laying line 6, flat, interrupted locally (as will be seen below), which forms the lower end of the container 1 and allows it to be placed upright, on a flat surface. The laying line 6 is not, in practice, zero width (measured radially), but its width is small in front of its radius. For better visibility, the laying line 6 is greyed out in FIG. 2. The bottom 3 also comprises a raised central zone 7 with respect to the laying line 6. In the example illustrated, this central zone 7 may be in the form of a sphere portion and comprise at its center, in the axis X of the container 1, a pellet 8 resulting from the injection of the preform from The bottom 3 further comprises a concave arch 9 which extends from the laying line 6 to the central zone 7. This vault 9 has the general function of stiffening the bottom 3. The only presence of the vault 9 is however not sufficient to give the bottom 3 the necessary mechanical resistance to the deformations under the hydrostatic pressure, increased by the pressure of the gas possibly present in the volume under col.
    [0008] This is why the bottom 3 is provided with a series of beams 10 formed in relief in the vault 9 and which radiate from the central zone 7 to the seat 5. The beams 10 are at least three in number. In the example illustrated, the beams 10 are precisely three in number but this number could be greater.
    [0009] More specifically, each beam 10 comprises a pair of radial grooves 11 formed recess in the vault 9. Each groove 11 ends towards the inside of the container by a bottom 12 (preferably rounded), and is delimited laterally by a flank 13 external and an internal flank 14 which meet at the bottom and form an angle A. An embodiment shown in the figures, and more particularly in FIG. 4, the angle A is non-zero: each groove 11 is flares towards the outside of the container 1 and thus has, in cross section, a V-shaped profile, to the benefit of the bottom blowing 3 (that is to say of its capacity to be formed by blowing with a good 'footprint). The angle A preferably between 5 ° and 20 °. The grooves 11 are separated by a rib 15 which extends radially from an inner end 16 at the central zone 7, to an outer end 17. The rib 15 forms a protruding bead from the bottoms 12 of the grooves 11 which ends with an end face 18. Thus, the beam 10 has in cross section (Figure 4) a roughly M-shaped profile (or VV-shaped in the observation direction of the container 1). The rib 15 is delimited laterally by the internal flanks 14 of the grooves 11. According to one embodiment, the internal flanks 14 form dropped edges (substantially parallel to each other) for the rib 15 which thus has a U-shaped profile in cross-section, to the benefit of the structural rigidity of the beam 10 and more particularly its resistance to bending and buckling stresses. As illustrated in FIG. 4, the rib 15 has a width, measured transversely, denoted L, and a height (measured between the bottom 12 of the grooves 11 and the end face 18), denoted H, such that their ratio L / H is between 0.5 and 2. According to an advantageous embodiment, the L / H ratio is of the order of 1.4. The height H of the rib 15 may be substantially constant over the entire length (measured radially) of the beam 10. On the other hand, its width L may be variable, as in the example illustrated in FIG. 3, where the width L decreases ( slightly) from the inner end 16 to the outer end 17. According to an embodiment illustrated in the figures, the end face 18 extends, at least inside the perimeter delimited by the laying line 6, in the extension of the vault 9 (i.e. say that the rib 15 is flush with the vault 9 without exceeding). In other words, inside the perimeter delimited by the laying line 6, the height H of the rib 15 is substantially equal to the depth of the grooves 11. According to an embodiment illustrated in the figures, and more particularly visible in Figures 2 and 5, each beam 10 extends radially to beyond the seat 5, thus interrupting the line 6 laying. Each beam 10 thus has a central section 10A, which extends radially from its inner end 16 to the right of the laying line 6, and a peripheral section 10B which extends the central section 10A from the right of the line 6 of pose to the outer end 17. As seen in Figure 2, when viewed from outside the container 1, the central section 10A is concave, while the peripheral section 10B is convex. As is also seen in Figures 2 and 5, the depth of the grooves 11 is not constant over the entire length of the beam 10. This depth is substantially constant in the central section 10A, where it is substantially equal to the height H of the rib 15, while it is relatively larger in the seat 5. The particular structure, described above, of the beams 10, reinforces the vault 9. More specifically, the structure in M ( or VV) of each beam 10 makes it particularly resistant to bending stresses due to the pressure of the content, as well as buckling stresses due to the axial compression of the palletized container 1 and the lateral movements of the container 1 during the various manipulations of the palette. However, it is possible to further stiffen the bottom 3, thanks to a series of valleys 19 formed hollow in the vault 9 and interposed between the beams 10. As seen in Figures 2 and 4, each valley 19 extends between two beams 10, radiating from the central zone 7 to beyond the seat 5, thereby interrupting the laying line 6. Each valley 19 is delimited laterally by a pair of flanks 20 which, as illustrated in FIG. 7, define between them an angle B of between 40 ° and 60 °, which makes it possible to promote the rigidity of the bottom 3 without impairing its blowing. . By opening under the effect of an axial compression (that is to say when the angle B increases), the valleys 19 tend to close the grooves 11 (that is to say to do to reduce the angle A), which, on the one hand, stiffens the beams 10 and, on the other hand, makes it possible to absorb the distortions of the laying line 6 and thus to maintain its flatness. In order to avoid unsightly creases around the outer ends 17 of the beams 10, the container 1 may be provided, for each beam 10, with a pair of secondary ribs 21 projecting from the outer end 17. . In the illustrated example, the secondary grooves 21 extend substantially at right angles to the beam 10 in the manner of a T, along lines of forces observed when placing the container 1 in axial compression.
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. A plastic container (1) having a body (2) and a bottom (3) extending from a lower end of the body (2), the bottom (3) comprising: a seat (5) device which defines a flat annular laying line (6) for the container (1); a concave arch (9) extending from the laying line (6) to a central zone (7); - a series of beams (10) formed recess in the vault (9) and which each radiate from the central zone (7) to the seat (5), characterized in that each beam (10) comprises a pair radial grooves (11) which are recessed in the roof (9) and are separated by a radial rib (15) projecting from the bottoms (12) of the grooves (11).
    [0002]
    2. Container (1) according to claim 1, characterized in that the rib (15) is laterally delimited by flanks (14) forming fallen edges.
    [0003]
    3. Container (1) according to claim 1 or claim 2, characterized in that the grooves (11) of the pairs of grooves have a cross section V-shaped profile.
    [0004]
    4. Container (1) according to one of the preceding claims, characterized in that the rib (15) has a cross-sectional profile U.
    [0005]
    5. Container (1) according to one of the preceding claims, characterized in that the radial rib (15) has a width L, measured transversely, and a height H, such that their ratio L / H is between 0.5 and 2.
    [0006]
    6. Container (1) according to one of the preceding claims, characterized in that each beam (10) extends beyond the seat (5) which it interrupts the line (6) laying.
    [0007]
    7. Container (1) according to claim 6, characterized in that it comprises a pair of secondary ribs (21) which project from an outer radial end (17) of the beam (10).
    [0008]
    8. Container (1) according to one of the preceding claims, characterized in that it further comprises a series of valleys (19) formed recess in the vault (9), and which each extend between two beams ( 10), each valley (19) radiating from the central zone (7) to beyond the seat (5).
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2015189515A1|2015-12-17|Container provided with a base with bulging beams
    EP2925616B1|2020-10-28|Container having an arched bottom provided with a double indentation
    EP2049405B1|2010-11-03|Bottom of hollow ware obtained by the blow moulding or stretch-blow moulding of a thermoplastic hollow ware preform having such a bottom
    EP2512935B1|2013-10-23|Container having deformable flanks
    EP2051910B1|2012-02-15|Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
    EP2580132B1|2015-08-19|Container including a ribbed, arched bottom
    EP2989015B1|2017-09-27|Container provided with a deformable base with a double arch
    WO2014207331A1|2014-12-31|Container having a petaloid base and groove
    EP2580133B1|2017-03-15|Container including an arched bottom having a square seat
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    EP3059175B1|2017-05-31|Container provided with a mini petaloid bottom with transverse corrugations
    WO2017103467A1|2017-06-22|Container having a petaloid base with rib feet
    EP2084070B1|2010-12-22|Bottom of hollow body obtained by blowing or drawing-blowing of a preform
    EP3060487B1|2017-09-20|Container with a cross-section which changes between a square contour and a rectangular contour
    FR3074482A1|2019-06-07|CONTAINER WITH PETALOID BACKGROUND
    同族专利:
    公开号 | 公开日
    MX2016015782A|2017-02-27|
    FR3022223B1|2016-06-24|
    WO2015189515A1|2015-12-17|
    US20170121049A1|2017-05-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1994002362A1|1992-07-16|1994-02-03|Plastipak Packaging, Inc.|Plastic blow molded freestanding container|
    EP2133277A1|2008-06-13|2009-12-16|Sidel Participations|Container, in particular a bottle, made from thermoplastic material equipped with a reinforced bottom|
    WO2012069759A1|2010-11-25|2012-05-31|Sidel Participations|Combined petaloid base of a container|
    WO2014083255A1|2012-11-30|2014-06-05|Sidel Participations|Container having a bottom provided with a vault with a double indentation|
    FR2649035B1|1989-06-29|1991-10-25|Sidel Sa|METHOD OF MANUFACTURING BY STRETCH-BLOWING POLYETHYLENETEREPHTHALATE CONTAINERS FOR FILLING WITH HOT LIQUID|
    FR2753435B1|1996-09-16|1998-10-16|Sidel Sa|CONTAINER, PARTICULARLY BOTTLE, IN PLASTIC MATERIAL|
    US6065624A|1998-10-29|2000-05-23|Plastipak Packaging, Inc.|Plastic blow molded water bottle|
    WO2015099813A1|2012-12-27|2015-07-02|Niagara Bottling, Llc|Plastic container with strapped base|CH707262A2|2012-11-30|2014-05-30|Alpla Werke|Plastic container.|
    JP6639088B2|2015-01-30|2020-02-05|株式会社吉野工業所|Double container|
    USD811230S1|2016-03-04|2018-02-27|Aquawell Group AG|Bottle|
    FR3057246A1|2016-10-06|2018-04-13|Sidel Participations|PETALOID BACKGROUND WITH BREAKED VALLEY|
    CN108528899B|2018-04-12|2020-01-07|广东星联精密机械有限公司|Bottle bottom structure of lightweight plastic bottle|
    法律状态:
    2015-05-26| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-18| PLSC| Search report ready|Effective date: 20151218 |
    2016-05-26| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-23| PLFP| Fee payment|Year of fee payment: 4 |
    2018-05-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1455406A|FR3022223B1|2014-06-13|2014-06-13|CONTAINER HAVING A BOURRELE BEAM BOTTOM|FR1455406A| FR3022223B1|2014-06-13|2014-06-13|CONTAINER HAVING A BOURRELE BEAM BOTTOM|
    MX2016015782A| MX2016015782A|2014-06-13|2015-06-09|Container provided with a base with bulging beams.|
    PCT/FR2015/051521| WO2015189515A1|2014-06-13|2015-06-09|Container provided with a base with bulging beams|
    US15/318,543| US20170121049A1|2014-06-13|2015-06-09|Container provided with a base with bulging beams|
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