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EP2989015B1 - Behälter mit verformbarem unterteil mit doppeltem bogen - Google Patents

Behälter mit verformbarem unterteil mit doppeltem bogen Download PDF

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Publication number
EP2989015B1
EP2989015B1 EP14727586.1A EP14727586A EP2989015B1 EP 2989015 B1 EP2989015 B1 EP 2989015B1 EP 14727586 A EP14727586 A EP 14727586A EP 2989015 B1 EP2989015 B1 EP 2989015B1
Authority
EP
European Patent Office
Prior art keywords
container
groove
flanks
plane
feet
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.)
Not-in-force
Application number
EP14727586.1A
Other languages
English (en)
French (fr)
Other versions
EP2989015A1 (de
Inventor
Wilfried Hermel
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.)
Sidel Participations SAS
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Sidel Participations SAS
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Filing date
Publication date
Application filed by Sidel Participations SAS filed Critical Sidel Participations SAS
Publication of EP2989015A1 publication Critical patent/EP2989015A1/de
Application granted granted Critical
Publication of EP2989015B1 publication Critical patent/EP2989015B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs

Definitions

  • the invention relates to the field of containers, such as bottles or pots, made of plastic material, obtained by blow molding or stretch blow molding from a blank (whether it be a preform or an intermediate container having has undergone pre-blowing operation of a preform), and comprising a body, which is extended at an upper end by a neck through which the filling and emptying of the container are made, and, at a lower end, by a closed bottom the recipient.
  • blow molding and stretch blow molding operations performed in a mold in the impression of the container, give the material a certain rigidity, resulting from the double orientation that it undergoes, both axially (parallel to the axis). general mold - or container) and radially (perpendicular to the axis).
  • Internal stresses include, for the most part, the temperature or pressure of the contents.
  • thermofixation that is to say a thermal crystallization
  • thermal stresses undergone during hot filling of the order of 90 ° C for some drinks such as pasteurized fruit juice or tea.
  • heat setting because of its cost and its high cycle time, can not be generalized to more ordinary applications such as still water.
  • petalo ⁇ des including projecting feet, whose tops define a laying plane for the container, separated by deep valleys, which offer increased resistance to the high internal pressure induced by certain contents (notably carbonated drinks).
  • the petaloid bottoms because of the complexity of their shapes and the depth of their valleys (this depth generally represents at least 50% of the overall diameter from the bottom), however, require a relatively large amount of material, which makes them unsuitable for ordinary applications such as still water, for which on the contrary it is sought to minimize the amount of material used.
  • the external stresses essentially comprise the axial compressive forces to which the palletized containers are subjected, each container carrying the weight of the column of containers above it. While thermofixed and / or petaloid-based containers generally withstand this type of constraint, thanks to their increased mechanical performance, the containers devolved to ordinary applications such as flat water are more difficult to withstand, and crushing phenomena are sometimes to deplore when palletizing this type of container.
  • a plastic container comprising a body, which extends along a main axis, and a bottom which extends to a lower end of the body, the bottom being provided with feet which are formed by outwardly protruding protuberances of the container and extend from a central zone of the bottom including a pellet resulting from injection molding of the preform from which the container is derived, and where the material has remained substantially amorphous, the feet being provided with vertices which extend in a common laying plan, the bottom of the feet being separated in pairs by hollow grooves which extend radially from a central zone of the bottom, each foot having two flanks which each border laterally a groove and the flanks of two adjacent feet which border the same groove form between them, at the level of the laying plane and in a plane transverse to the radial direction of extension of the groove, an obtuse angle at the top.
  • a first objective is to provide a container whose bottom has, in equal amount of material, improved mechanical
  • a second objective is to provide a container whose bottom has an improved puffability.
  • a third objective is to provide a container whose bottom gives it a better mechanical resistance to compression under axial compression.
  • a container according to claim 1 attached. Under axial compression, the angle A tends to open, which allows a slight axial compression of the bottom, resulting in an increase in the pressure of the contents of the container, and therefore a greater rigidity thereof.
  • a container 1 in this case a bottle, made by stretch blow molding from a thermoplastic preform, for example PET (polyethylene terephthalate).
  • This container 1 is intended to accommodate a flat content (including flat water).
  • This container 1 comprises, at an upper end, a threaded neck 2 , provided with a rim 3.
  • the container 1 comprises in its upper part a shoulder 4 flaring in the direction opposite to the neck 2, this shoulder 4 being extended by a side wall or body 5, of generally cylindrical shape of revolution about a main axis X of the container 1.
  • the container 1 further comprises a bottom 6 which extends opposite the neck 2, from a lower end of the body 5.
  • a D denotes an overall transverse dimension of the bottom 6, measured at its junction with the 5.
  • the bottom 6 is provided with feet 7 formed by protuberances protruding outwardly of the container 1, and which extend from a central zone 8 of the bottom 6, which central zone 8 extends recessed towards the inside of the 1 and includes a pellet 9 after injection molding of the preform from which the container 1, and where the material remained substantially amorphous.
  • Each foot 7 has a concavely lower, domed face 10 facing outwardly of the container 1. As illustrated in FIG. figure 4 This bottom face 10 extends radially sloping (less than or equal to 10 ° with respect to a transverse plane perpendicular to the axis X of the container) from the central area 8 up to a face 11 uppermost, it -after referred to simply more vertex, which forms the most prominent part of the foot 7.
  • the peaks 11, which form the most protruding part of the feet 7, extend in a common transverse plane 12 , said laying plane, by which the container 1 can rest on a flat surface such as a table.
  • the vertices 11 have, in the plane 12 of laying a fan-shaped outline, and are connected to a lateral wall 13 external of the bottom by a leave 14 with large radius.
  • C is the average angular aperture defined by the apex 11 of each foot 7, measured in the laying plane 12 and centered on the axis X ( figure 3 ).
  • the bottom 6 is provided with a series of recessed grooves 15 which extend radially from the central zone 8 and separate the legs 7 in pairs.
  • the bottom 6 comprises seven grooves 15 (and seven feet 7 ), but this number could be less (at least three) or greater (for example up to eleven grooves 15 and 7 feet).
  • each groove 15 has a depth H, measured in line with the laying plane 12 between it and the bottom of the groove 15, such that: H D ⁇ 1 10
  • H and D are in a report such that: H D ⁇ 1 20
  • the depth of the valleys in line with the laying plane is in a ratio of less than 1/5 with the overall transverse dimension of the bottom.
  • each groove 15 has, in vertical section (in a plane parallel to the axis X and perpendicular to the radius along which the groove extends), a profile in the form of arch (in other words flared U), concavity turned towards the outside of the container 1.
  • each foot 7 has two flanks 17 which each laterally border a groove 15, so that a groove 15 is bordered laterally by two flanks 17 respectively belonging to the two adjacent feet 7 flanking the groove 15.
  • each foot 7 has, on the figures 2 and 3 , grayed out by a dot pattern, two sides 17 on either side of the same groove 15 (itself filled with a dotted pattern).
  • the flanks 17 bordering the same groove 15 form between them, at the level of the laying plane 12 and in a plane transverse to the radial direction of extension of the groove 15 and parallel to the X axis , an obtuse angle A at the top.
  • the angle A at the top between the flanks 17 bordering the same groove 15 is preferably between 90 ° and 150 °. According to a preferred embodiment, illustrated in the figures, the angle A is approximately 120 °.
  • Each flank 17 is preferably concave, concavity turned towards the outside of the container 1.
  • the radius of curvature of the flank 17 is much greater than that of the groove 15.
  • the ratio between the radius of curvature of the groove 15 and that of the sidewall 17 is less than 1/10, and in particular of the order of 1/15.
  • the flanks 17 thus form, on either side of the groove, an open secondary arch whose function will be highlighted below.
  • Each flank 17 is connected, on the one hand, to the top 11 of the foot 7, on the other hand, to the groove 15, by leave of small radius.
  • each flank 17 has, seen from below, a contour in the form of an arrow tail, which flares from a point located in the vicinity of the central zone 8 to an enlarged central portion to the right of the laying plane 12 , then tapers from the central portion to a point located to the right of the outer lateral wall 13 of the bottom 6.
  • flanks 17 bordering the same groove 15 define, in a plane parallel to the laying plane 12 , a maximum angular aperture B (centered on the axis X and measured in the laying plane 12 between the outer edges of the central portions of the flanks 17 ).
  • the angular aperture B is preferably greater than the angular aperture C defined by each apex 11.
  • the angular aperture B is in a ratio with the angular aperture C defined by each vertex, such as: B VS ⁇ 2
  • the bottom 6 of the container 1 can also be subdivided into two concentric regions, namely an annular central region 18 surrounding the central zone 8 of the base 6, and an annular peripheral region 19 surrounding the central region 18 , separated by a ring recess 20 which extends axially on a predetermined height.
  • This recess 20 is substantially median with respect to the base 6, that is to say that the central region 18 and the peripheral region 19 have substantially the same radial extension.
  • the recess 20 extends continuously, that is to say, it is not interrupted to the right of the grooves 15 but extends to the bottom thereof, or to the right of the feet 7, but extends astride thereof, including their lower faces 10 and 17 on their sides.
  • the recess 20 forms a ring with a circular contour.
  • the central region 18 of the bottom 6 is slightly offset in height with respect to the peripheral region 19 towards the interior of the container 1.
  • the recess 20 serves to maintain the stability of the container 1 by inducing a stiffening of the bottom 6 in its central region.
  • the bottom 6 has good blowability (thanks in particular to the large angular opening A flanks 17 ), while giving the container 1 better mechanical performance than an ordinary container equivalent amount of material.
  • This general deformation has the effect of pressurizing the contents of the container 1, and consequently to increase the rigidity of the container 1, in favor of its resistance to axial compression.
  • the bottom 6, and more generally the container 1, thus behave as a compression spring whose stiffness increases with the compression force applied axially.
  • the recess 20 makes it possible to limit the axial deformation of the bottom 6 by forming a piston which forms an end stop which, under the effect of a high axial compressive stress, joins the laying plane 12 and thus increases the contact surface of the container with its support.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Claims (9)

  1. Behälter (1) aus Kunststoff, umfassend einen Körper (5), der sich entlang einer Hauptachse (X) erstreckt, und ein Unterteil (6), das sich an einem unteren Ende des Körpers (5) erstreckt, wobei das Unterteil (6) mit Füßen (7) versehen ist, die durch Vorsprünge ausgebildet sind, die zum Äußeren des Behälters (1) hin abstehen und die sich von einer mittleren Zone (8) des Unterteils (6) erstrecken, wobei sich die mittlere Zone (8) hohlförmig zum Inneren des Behälters (1) erstreckt und eine Pastille (9) enthält, die vom Spritzgießen des Vorformlings kommt, aus dem der Behälter (1) hervorgegangen ist, und wo das Material im Wesentlichen amorph geblieben ist, wobei die Füße (7) mit Scheitelpunkten (11) versehen sind, die sich in einer gemeinsamen Abstellebene (12) erstrecken, wobei die Füße (7) durch hohlförmige Vertiefungen (15), die sich radial von einer mittleren Zone (8) des Unterteils (6) erstrecken, paarweise getrennt sind, wobei jeder Fuß (7) zwei Flanken (17) aufweist, die jeweils eine Vertiefung (15) seitlich umranden, Behälter, wo die Flanken (17) zweier benachbarter Füße (7), die eine selbe Vertiefung (15) umranden, untereinander an der Abstellebene (12) und in einer Ebene, die quer zu der radialen Erstreckungsrichtung der Vertiefung (15) verläuft, einen stumpfen Winkel (A) zum Scheitelpunkt bilden, wobei jede Vertiefung (15) eine Tiefe H aufweist, die senkrecht zu der Abstellebene (12) zwischen derselben und dem Boden der Vertiefung (15) derart gemessen wird, dass: H D ≤ 1 10
    Figure imgb0009
     wobei D eine Gesamt-Querabmessung des Unterteils (6) ist, die an dessen Verbindung zum Körper (5) gemessen wird.
  2. Behälter (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Winkel A am Scheitelpunkt zwischen den Flanken (17) zwischen 90° und 150° beträgt.
  3. Behälter (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Winkel A am Scheitelpunkt zwischen den Flanken (17) ungefähr 120° beträgt.
  4. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede Flanke (17) eine Höhlung aufweist, die zu dem Äußeren des Behälters (1) hin gedreht ist.
  5. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tiefe der Vertiefung (15) derart ist, dass H D = 1 10
    Figure imgb0010
  6. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Flanken (17), die eine selbe Vertiefung (15) umranden, in einer Ebene, die parallel zur Abstellebene (12) verläuft, eine maximale winkelige Öffnung B definieren, die auf der Achse (X) des Körpers (5) gemessen wird, die über der winkeligen Öffnung C liegt, die von dem Scheitelpunkt (11) jedes Fußes (7) definiert wird, die in der Abstellebene (12) auf der Achse (X) des Körpers (5) gemessen wird.
  7. Behälter (1) nach Anspruch 7, dadurch gekennzeichnet, dass die maximale winkelige Öffnung B der Flanken (17) derart ist, dass B C ≅ 2
    Figure imgb0011
  8. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Unterteil (6) des Behälters zwei konzentrische Bereiche aufweist, und zwar einen mittleren Bereich (18) und einen Randbereich (19), die durch einen mittleren axialen Abschnitt (20) getrennt sind, der sich ringförmig in durchgehender Art und Weise erstreckt, so dass der mittlere Bereich (18) bezogen auf den Randbereich (19) zum Inneren des Behälters (1) hin axial versetzt ist.
  9. Behälter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die Vertiefungen (15) über die Abstellebene (12) hinaus auf einer äußeren Seitenwand (13) des Unterteils fortsetzen.
EP14727586.1A 2013-04-24 2014-04-22 Behälter mit verformbarem unterteil mit doppeltem bogen Not-in-force EP2989015B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1353759A FR3005035B1 (fr) 2013-04-24 2013-04-24 Recipient muni d'un fond deformable a double arche
PCT/FR2014/050980 WO2014174210A1 (fr) 2013-04-24 2014-04-22 Récipient muni d'un fond déformable à double arche

Publications (2)

Publication Number Publication Date
EP2989015A1 EP2989015A1 (de) 2016-03-02
EP2989015B1 true EP2989015B1 (de) 2017-09-27

Family

ID=48979943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14727586.1A Not-in-force EP2989015B1 (de) 2013-04-24 2014-04-22 Behälter mit verformbarem unterteil mit doppeltem bogen

Country Status (5)

Country Link
US (1) US20160304233A1 (de)
EP (1) EP2989015B1 (de)
CN (1) CN105050903B (de)
FR (1) FR3005035B1 (de)
WO (1) WO2014174210A1 (de)

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WO2025259621A1 (en) * 2024-06-12 2025-12-18 Graham Packaging Company, L.P. Container with dynamic base

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AU2021202920A1 (en) * 2020-05-08 2021-11-25 Orora Packaging Australia Pty Ltd A bottle, and an insert and a mould for making the bottle
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Also Published As

Publication number Publication date
US20160304233A1 (en) 2016-10-20
WO2014174210A1 (fr) 2014-10-30
CN105050903A (zh) 2015-11-11
CN105050903B (zh) 2017-08-04
FR3005035A1 (fr) 2014-10-31
EP2989015A1 (de) 2016-03-02
FR3005035B1 (fr) 2016-01-15

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