EP2925616A1 - Recipient ayant un fond muni d'une voute a double decrochement - Google Patents
Recipient ayant un fond muni d'une voute a double decrochementInfo
- Publication number
- EP2925616A1 EP2925616A1 EP13803143.0A EP13803143A EP2925616A1 EP 2925616 A1 EP2925616 A1 EP 2925616A1 EP 13803143 A EP13803143 A EP 13803143A EP 2925616 A1 EP2925616 A1 EP 2925616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- recess
- diameter
- region
- laying
- 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
Links
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
- B65D1/40—Details of walls
- B65D1/42—Reinforcing or strengthening parts or members
-
- 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 manufacture of containers, especially bottles or jars, obtained by blow molding or stretch blow molding from plastic preforms, such as polyethylene terephthalate (PET).
- plastic preforms 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.
- a fluid in particular a gas such as air
- the blowing can be completed by preliminary stretching of the blank by means of a sliding rod.
- the double molecular orientation that the material undergoes during blowing gives the container a certain structural rigidity.
- the objective is twofold: economic (reduce costs) and ecological (reduce environmental footprint), by reducing the amount of material used, and reducing blowing pressures.
- 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.
- This method illustrated by the French patent FR 2 649 035 (Sidel) and its US equivalent US 5,145,632, is essentially used for HR applications (initials of the term "heat resistant", that is heat-resistant), in which the container is hot filled.
- such a container Under normal conditions of filling, such a container has a wall flexibility such that it is difficult to palletize without risk of sagging of the pallet. Indeed, given the high constraints of vertical compression that accumulate on the containers of the lower rows of the pallet, these containers have a high risk of buckling.
- this form tip requires both an additional material, incompatible with the aforementioned lightening requirements, and a high blowing pressure, incompatible with energy saving requirements, which on the contrary, suppose a decrease in the blowing pressure necessary for forming the container.
- a first objective is to improve the mechanical performance of the blowing containers (i.e. the capacity of the container to be formed by blowing) equivalent.
- a second objective is to propose a container whose optimized bottom shape gives it a good compromise between breathability, lightness and rigidity.
- a third objective is to provide a container whose bottom offers good resistance to overturning and which, under conditions of high pressure, can remain stable.
- a plastic container provided with a body and a bottom extending from a lower end of the body, the bottom comprising:
- the vault having three concentric regions, namely a central region, a median region and a peripheral region, separated respectively by an axial internal recess and an axial external recess which extend annularly in a continuous manner around the central zone, so that the central region is elevated in relation to the median region, and the median region is elevated relative to the peripheral region.
- the bottom has increased resistance to turning, without the need to increase the depth of the grooves or the vault itself. This improvement in performance of the bottom is therefore obtained without significant degradation of its blowing, and without significant additional material.
- each recess has a height less than 4% of an outer diameter of the laying plane
- each recess has a height of about 3% of the outer diameter of the laying plane
- each recess extends over a height of about 1 mm; the internal recess has a diameter of between 30% and 40% of an outer diameter of the laying plane;
- the diameter of the internal recess is approximately 37% of the diameter of the laying plane;
- the external recess has a diameter of between 50% and 60% of an outer diameter of the laying plane;
- the diameter of the external recess is about 54% of the diameter of the laying plane
- the main reinforcement grooves extend radially beyond the seat
- the bottom comprises a series of reinforcing spacer grooves, which extend locally astride the seat.
- Figure 1 is a perspective bottom view of a plastic container
- Figure 2 is a perspective view, on an enlarged scale, showing the bottom of the container of Figure 1;
- Figure 3 is a bottom plan view showing the bottom of the container
- Figure 4 is a cross-sectional view, in perspective, of the bottom of Figure 3, according to the section plane IV-IV;
- FIG. 5 is a central sectional view of the bottom of Figure 3, according to the sectional planes IV-IV (solid line) and V-V (dashed).
- Figure 1 a container 1, in this case a bottle, made by stretching blow from a thermoplastic preform, for example PET (polyethylene terephthalate).
- a thermoplastic preform for example PET (polyethylene terephthalate).
- This container 1 comprises, at an upper end, a neck 2, provided with a rim 3.
- the container 1 comprises in its upper part a shoulder 4 flaring in the opposite direction 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.
- the bottom 6 comprises a peripheral seat 7 in the form of an annular bead which extends substantially axially in the extension of the body 5.
- the seat 7 ends with a plane 8 laying perpendicular to the axis X of the container 1, which laying plane 8 defines the lower end of the container 1 and allows it to be placed upright on a flat surface.
- D denotes the outer diameter of the laying plane 8, the term “diameter” covering not only the case (illustrated) where the container 1 (and thus the bottom 6) is circular in outline, but also the case where the container 1 would be polygonal contour (for example square), in which case the term “diameter” would designate the diameter of the circle that would fit into this polygon. In the example illustrated, corresponding to a container with a capacity of 0.5 liter, this diameter D is approximately 45 mm.
- the seat 7 Towards the interior of the container 1, the seat 7 comprises a frustoconical annular cheek 9 which extends towards the interior of the container 1 in the extension of the laying plane 8, the truncated cone formed by the cheek 9 opening downward (in relief) and having an apex angle of at least 70 °.
- This cheek 9 may have a height of between 1.5 mm and 2.5 mm, for example about 2 mm.
- the bottom 6 further comprises a concave arch 10, in the form of a substantially spherical cap concavity facing outwardly of the container 1 in the absence of stress, that is to say in the absence of content in the vessel 1.
- the arch 10 extends from the seat 7, in the extension of the cheek 9, to a central zone 11 of the bottom 6 forming a pin projecting towards the interior of the container 1, with in its center an amorphous pad 12 which corresponds to the injection zone of the constituent material of the preform used to make the container.
- the pellet performs a centering function during the forming of the container 1 (by blowing or stretching).
- the bottom 6 comprises a series of main reinforcement grooves 13 formed inwardly of the container 1, which extend radially from the zone 11 central, up to seat 7 at least.
- the main reinforcing grooves 13 extend radially beyond the seat 7, rising laterally on a lower part of the body 5.
- the main grooves 13 extend radially over the entire roof 10, straddling the seat 7 and partially on the body 5. It is therefore understood that the laying plane 8 is discontinuous, since interrupted at the right of each groove 13 main.
- the main grooves 13 are for example five in number (as in the example illustrated, which corresponds to a container with a capacity of about 0.5 liter), but this number could be higher, especially six in the case of a container with a capacity greater than or equal to 1 liter, or seven in the case of a container with a capacity greater than or equal to 2.5 liters.
- H is the height (or depth) of the bottom 6, measured between the laying plane 8 and the pellet 12 ( Figure 5).
- the height H of the bottom is about 10 mm.
- the bottom 6 is further provided with a series of interleaving reinforcement grooves 14, located between the main grooves 13, and which extend locally astride the seat 7, which they thus contribute. to stiffen.
- the intermediate ribs 14 extend outwardly beyond the seat 7 laterally upwardly on a lower part of the body 5, as the grooves 13 main.
- FIGS. 2 and 3 also show that the intermediate ribs 14 overlap the cheek 9 but are interrupted at the periphery of the arch 10.
- the vault 10 has three concentric regions, namely an annular central region surrounding the central zone 11 of the bottom 6, an annular median region 16 surrounding the central region, and an annular peripheral region 17 surrounding the medial region 16 and extending to the cheek 9.
- the regions 15, 16, 17 are arranged in steps, and are separated two by two by recesses, namely an internal recess 18 separating the central region and the median region, and an external recess 19 separating the median region 16 and the peripheral region.
- the internal recess 18 extends axially over a predetermined height H1.
- the outer recess 19 extends axially over a predetermined height H2.
- the heights H1 and H2 are relatively small compared to the height H of the bottom and, especially, with respect to the external diameter D of the laying plane: 0.02 D ⁇ H1 ⁇ 0.04 D
- the recesses 18, 19 both extend continuously, that is to say that they are not interrupted to the right of the main grooves 13 and grooves 14 interlayers but extend to the bottom of these this.
- the recesses 18, 19 extend annularly concentrically around the central zone 11.
- the recesses 18, 19 form circular contour rings whose D1 and D2 denote the respective diameters.
- the recesses 18, 19 also have a polygonal contour, homothetic to the outer contour of the container 1. D1 and D2 then designate the diameters of the circles inscribed in the polygonal contours of the recesses.
- the central region although having a radius of curvature substantially identical to that of the medial region 16, is slightly raised relative thereto, being shifted towards the interior of the container. 1.
- the median region 16 although having a radius of curvature substantially identical to that of the peripheral region 17, is slightly raised relative to this, being offset towards the inside of the container.
- the diameter D1 of the internal recess 18 is between 30% and 40% of the external diameter D of the laying plane 8.
- the ratio D1 / D is about 37%.
- the diameter D1 of the outer recess 19 is preferably between 50% and 60% of the outer diameter D of the laying plane 8.
- the ratio D2 / D is about 54%.
- the heights H1 and H2 are rather between 0.8 mm and 1 mm, and preferably of about 1 mm.
- the recesses 18, 19 have the function of maintaining the stability of the container 1 under restrictive pressure conditions, especially when there is in the container 1 a positive pressure induced by introduction prior to the plugging of a drop of neutral gas (in particular nitrogen) intended to maintain the rigidity of the body 5. More specifically, the recesses 18, 19 have the function, by the introduction into the bottom 6 of an axial component, to increase the pressure threshold beyond which the bottom 6 is made to turn around. The low height of the recesses 18, 19 is sufficient to improve the performance of the bottom 6, while ensuring for it a good blowing, the benefit of ease of forming and pressure savings. In practice, with equal quantity of material, the bottom 6 thus designed can be formed under the same pressure conditions as that described in the aforementioned EP 2 133277 patent.
- the recesses 18 and 19 oppose indeed the complete reversal of the bottom 6 by inducing a stiffening of the vault 10 in its median region, and limiting the deformation of the vault 10 so as to widen the seat 7 towards the center of the bottom 6. At most, the bottom 6 actually subsides but in a controlled manner, the peripheral region 17 (possibly doubled the median region 16) then forming a secondary seat by which the container 1 can rest stably on a support surface .
- the container 1 is rigid enough to be palletized without risk of sagging of the pallet.
- the container 1 provided with such a bottom 6 thus has a good compromise between the mechanical performance (that is to say the capacity of the container 1 to resist deformations and, when they occur, to undergo them in a controlled manner ) and the blowing (that is to say the capacity of the container 1 to be formed by blowing).
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1261523A FR2998877B1 (fr) | 2012-11-30 | 2012-11-30 | Recipient ayant un fond muni d'une voute a double decrochement |
| PCT/FR2013/052730 WO2014083255A1 (fr) | 2012-11-30 | 2013-11-13 | Recipient ayant un fond muni d'une voute a double decrochement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2925616A1 true EP2925616A1 (fr) | 2015-10-07 |
| EP2925616B1 EP2925616B1 (fr) | 2020-10-28 |
Family
ID=48170570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13803143.0A Active EP2925616B1 (fr) | 2012-11-30 | 2013-11-13 | Recipient ayant un fond muni d'une voute a double decrochement |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9758271B2 (fr) |
| EP (1) | EP2925616B1 (fr) |
| CN (1) | CN104812676A (fr) |
| FR (1) | FR2998877B1 (fr) |
| WO (1) | WO2014083255A1 (fr) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PE20141925A1 (es) * | 2011-08-31 | 2014-12-05 | Amcor Ltd | Base de recipiente de peso ligero |
| US8556098B2 (en) | 2011-12-05 | 2013-10-15 | Niagara Bottling, Llc | Plastic container having sidewall ribs with varying depth |
| US11845581B2 (en) | 2011-12-05 | 2023-12-19 | Niagara Bottling, Llc | Swirl bell bottle with wavy ribs |
| DE102012003219B4 (de) * | 2012-02-20 | 2025-06-26 | Krones Ag | Kunststoffbehältnis |
| CH707262A2 (de) * | 2012-11-30 | 2014-05-30 | Alpla Werke | Kunststoffbehälter. |
| BR112015015458A2 (pt) | 2012-12-27 | 2017-07-11 | Niagara Bottling Llc | recipiente de plástico com base presa |
| CA2898357C (fr) * | 2013-01-15 | 2022-03-08 | Graham Packaging Company, L.P. | Base de recipient a deplacement variable |
| US10513364B2 (en) | 2013-01-15 | 2019-12-24 | Graham Packaging Company, L.P. | Variable displacement container base |
| FR3005035B1 (fr) * | 2013-04-24 | 2016-01-15 | Sidel Participations | Recipient muni d'un fond deformable a double arche |
| FR3022223B1 (fr) * | 2014-06-13 | 2016-06-24 | Sidel Participations | Recipient muni d'un fond a poutres bourrelees |
| MX375761B (es) * | 2014-07-30 | 2025-03-06 | Sipa Progettazione Automaz | Contenedor con compensación de variación de presión. |
| USD784142S1 (en) * | 2015-04-07 | 2017-04-18 | Societe Des Eaux De Volvic | Bottle |
| USD810575S1 (en) * | 2016-03-04 | 2018-02-20 | Aquawell Group AG | Bottle |
| FR3057246B1 (fr) * | 2016-10-06 | 2022-12-16 | Sidel Participations | Fond petaloide a vallee brisee |
| US10597213B2 (en) * | 2017-03-27 | 2020-03-24 | Yoshino Kogyosho Co., Ltd. | Pressure reduction-absorbing bottle |
| JP7748176B2 (ja) * | 2017-06-12 | 2025-10-02 | ソシエテ・デ・プロデュイ・ネスレ・エス・アー | 二重凹状アーチが設けられている容器底部ベース |
| US20200189785A1 (en) * | 2017-06-16 | 2020-06-18 | Societe Des Produits Nestle S.A. | Container having a bottom base provided with notches |
| US10766683B2 (en) | 2017-08-25 | 2020-09-08 | Graham Packaging Company, L.P. | Variable displacement base and container and method of using the same |
| FR3074482B1 (fr) * | 2017-12-04 | 2019-10-18 | Sidel Participations | Recipient a fond petaloide |
| FR3076818B1 (fr) * | 2018-01-18 | 2019-12-13 | Sidel Participations | Recipient comprenant un fond voute presentant des bossages de rigidification repartis en bandes annulaires imbriquees |
| IT201800005338A1 (it) * | 2018-05-14 | 2019-11-14 | Contenitore in materiale termoplastico | |
| MX2021000564A (es) | 2018-07-23 | 2021-06-23 | Co2Pac Ltd | Base de contenedor de desplazamiento variable. |
| DE102021125276A1 (de) | 2021-09-29 | 2023-03-30 | Krones Aktiengesellschaft | Kunststoffbehältnis mit stabilem Bodendesign |
| US12129072B2 (en) * | 2021-11-30 | 2024-10-29 | Pepsico, Inc. | Flexible base for aseptic-fill bottles |
| DE102022122887A1 (de) * | 2022-09-08 | 2024-03-14 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Umformen von Kunststoffvorformlingen zu Kunststoffbehältnissen |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2382373A1 (fr) * | 1977-03-02 | 1978-09-29 | Solvay | Corps creux en matiere thermoplastique |
| JPS6228335A (ja) * | 1985-07-16 | 1987-02-06 | 山村硝子株式会社 | プラスチツク製容器の底部構造 |
| FR2649035B1 (fr) | 1989-06-29 | 1991-10-25 | Sidel Sa | Procede de fabrication par etirage-soufflage de recipients en polyethyleneterephtalate destines au remplissage avec un liquide chaud |
| ATE148668T1 (de) * | 1992-06-02 | 1997-02-15 | Procter & Gamble | Verformungsbeständiger behälter |
| JP3425236B2 (ja) * | 1994-08-01 | 2003-07-14 | 株式会社フロンティア | 2軸延伸吹込成形壜 |
| US6409035B1 (en) * | 2000-11-28 | 2002-06-25 | Plastipak Packaging, Inc. | Hollow plastic bottles |
| FR2932458B1 (fr) | 2008-06-13 | 2010-08-20 | Sidel Participations | Recipient, notamment bouteille, en matiere thermoplastique equipe d'un fond renforce |
-
2012
- 2012-11-30 FR FR1261523A patent/FR2998877B1/fr not_active Expired - Fee Related
-
2013
- 2013-11-13 US US14/646,618 patent/US9758271B2/en active Active
- 2013-11-13 CN CN201380062384.3A patent/CN104812676A/zh active Pending
- 2013-11-13 EP EP13803143.0A patent/EP2925616B1/fr active Active
- 2013-11-13 WO PCT/FR2013/052730 patent/WO2014083255A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014083255A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014083255A1 (fr) | 2014-06-05 |
| FR2998877A1 (fr) | 2014-06-06 |
| EP2925616B1 (fr) | 2020-10-28 |
| US20150298848A1 (en) | 2015-10-22 |
| FR2998877B1 (fr) | 2014-12-26 |
| CN104812676A (zh) | 2015-07-29 |
| US9758271B2 (en) | 2017-09-12 |
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