EP2619097B1 - Bottom structure for a plastic bottle - Google Patents

Bottom structure for a plastic bottle Download PDF

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Publication number
EP2619097B1
EP2619097B1 EP11758410.2A EP11758410A EP2619097B1 EP 2619097 B1 EP2619097 B1 EP 2619097B1 EP 11758410 A EP11758410 A EP 11758410A EP 2619097 B1 EP2619097 B1 EP 2619097B1
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EP
European Patent Office
Prior art keywords
base structure
structure according
edge portion
outwardly curved
bottle
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
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EP11758410.2A
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German (de)
French (fr)
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EP2619097A1 (en
Inventor
Peter Hüls
Roland Concin
Gabriele Weber-Trinkfass
Andrea Kutscheid
Tilmann Kessler
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Red Bull GmbH
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Red Bull GmbH
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Publication of EP2619097A1 publication Critical patent/EP2619097A1/en
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Publication of EP2619097B1 publication Critical patent/EP2619097B1/en
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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
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/001—Supporting means fixed to the container
    • 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—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, 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
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • 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—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, 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—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, 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

Definitions

  • the invention relates to a bottom construction for a plastic bottle, in particular for pressurized beverages, comprising an annular edge portion, which is preferably formed integrally with the side wall of the bottle, and surrounded by the edge portion and integral with this one concave portion, wherein the concave Section star-shaped, has its rigidity enhancing reinforcing elements.
  • the invention relates to a plastic bottle for pressurized drinks with a bottom construction, the annular edge portion is preferably formed integrally with the side wall of the bottle.
  • a floor construction of the type mentioned is, for example, the DE-OS 1801368 refer to.
  • Plastic bottles are od only under certain design conditions for receiving and storage of pressurized drinks. Like. Suitable.
  • One of the major difficulties associated with the use of plastic bottles for the stated purpose is that the center portion of the bottle bottom tends to bow outward beyond the edge of the bottom, so that the stability of such Bottles is impaired.
  • champagne the bottom of the bottle is curved inwards and can thus withstand a certain internal pressure without sagging.
  • the champagne flute is especially common with glass bottles.
  • the suitability for pressurized drinks depends decisively on the wall thickness of the floor.
  • the wall thickness is too thin, the construction is too flexible and excessive cambering of the bottom of the bottle can not be prevented.
  • the wall thickness is too thick, the material consumption is great and the manufacturing costs and the weight of the bottle too high.
  • Champagne ground of the conventional type are therefore from a certain CO 2 concentration of the beverage from an economic point of view can not be used.
  • the soil has constrictions extending up to the side walls, between which arched, petal-like shaped fields are formed. Petaloid soils are particularly common in plastic bottles and withstand a high pressure even at a relatively low wall thickness of the soil.
  • the disadvantage is the lower stability and in particular the lower static tilt angle, so that the risk of falling over of the bottle is greater than in a comparable bottle with champagne.
  • the appearance of the bottle is affected by the petaloid fields extending up to the side wall.
  • a base for a plastic container according to the preamble of claim 1, with a central vertical axis, said base having an outer annular portion for supporting the container on a surface, a central region which is provided about the central vertical axis, and a Base region, which extends between the annular region and the central support region comprises.
  • the base region has at least two protrusions extending radially from a position adjacent to the annular region toward the central region, each protrusion having to comprise at least two stepped segments.
  • Containers equipped with such a base should have improved dimensional stability.
  • the WO 2007/060529 A2 relates to a container of a compression molded preform having a base, wherein the thickness of the base in the region of the major axis has to be less than or equal to 8.2 times the thickness of the container sidewall.
  • the support surface of the base may have a substantially continuous annular portion surrounding a convex, inwardly facing portion of the container.
  • the present invention therefore aims to develop a bottom construction for a plastic bottle such that the bottle is suitable for low-pressure and low consumption of material for the absorption of high-pressure drinks.
  • the adjustment should be simple, inexpensive and automated with short cycle times possible.
  • the bottle should have a pleasing and high-quality appearance and in particular the floor construction should bring no restrictions on the design of the bottle shape with it.
  • the invention provides a floor construction according to the features of claim 1.
  • the floor construction is thus based on the shape of a champagne flute, with the invention proposing elements for stiffening the concave bottom section in such a way that the material consumption is not or only slightly increased compared to a simple champagne flute.
  • the reinforcing elements provided according to the invention do not lead to thickening of the material at any point, since they are formed only by outwardly curved regions of the concave bottom section. It has surprisingly been found that such stiffening areas lead even at very low wall thickness of the soil to a very rigid construction in which even very high internal pressures of the bottle can not cause buckling of the soil.
  • the plastic bottle can be easily manufactured by conventional and proven methods.
  • PET polyethylene terephthalate
  • the production preferably takes place from a so-called PET preform, an injection-molded preform.
  • the way from a PET preform to the PET bottle goes through the following steps:
  • the preform is first heated, ie a temperature profile corresponding to the desired wall thickness distribution is introduced into the preform.
  • infrared heat radiators can be used for this purpose.
  • the preform is clamped in a mostly three-part mold and a mandrel moves into the preform and stretches it to the final length of the bottle. Compressed air blows the resulting tube into the final shape, after which the temperature of the bottle is brought below the glass transition temperature by cooling the tool.
  • the mold opens and the finished bottle is ejected.
  • the concave portion including the convex portions can be easily formed with a substantially uniform wall thickness.
  • “Essentially” here means that slight differences in the wall thickness can occur due to the production, such as the fact that when pressing the preform to the mold, the material is stretched more in the outwardly arched areas than in adjacent areas, so that the floor may be slightly thinner in these areas.
  • the outwardly curved portions are preferably elongated, i. that their extent in the radial direction is greater than in the circumferential direction. This leads to a particularly stable floor construction.
  • the outwardly curved areas are spaced apart in the circumferential direction.
  • the outwardly curved regions are evenly distributed in the circumferential direction, e.g. six areas are provided. Conceivable, depending on the diameter of the bottle but also 3,4,5,7,8,9,10,11 or 12 areas.
  • the outwardly curved areas can also serve as footprint of the bottle.
  • the embodiment is preferably such that the outwardly curved regions comprise a section parallel to a footprint or forming a footprint.
  • the parallel to the footprint section may, for example, a projecting to the footprint protrusion or the like ..
  • the bottle can also be in the conventional manner at the edge of the soil.
  • the formation is then made such that the annular edge portion of the floor construction has a footprint of the floor construction.
  • This results in a ground contact of the bottle bottom as in a conventional bottle with champagne ground along the bottom edge.
  • aesthetic requirements can be taken into account and, as in the case of a champagne bottle, a high-quality bottle design can be realized in which the sidewalls of the bottle run freely to the floor without stiffening elements or the like being visible.
  • the outwardly curved areas laterally and radially inward on the comprise curved sections which are formed parallel to the footprint or which form a footprint.
  • a further improvement in the stability of the floor construction preferably results from the fact that the outwardly curved areas surround an inwardly curved central area.
  • a further improvement in the stability of the floor construction results furthermore from the fact that the floor construction has at least one annular recess between the outwardly curved areas and the edge section, in particular adjacent to the edge section.
  • a further improvement in the stability of the floor construction preferably results from the fact that the floor construction has at least one annular recess between the outwardly curved areas and the inwardly curved central area.
  • a further improvement in the stability of the floor construction is further preferred in that the floor construction has an annular recess between the outwardly curved areas and the inwardly curved central area.
  • the outwardly curved regions preferably have a radial extension which essentially corresponds to the radial distance between the edge section and the central region, as a result of which maximum stiffening is achieved.
  • the floor construction according to the invention should be suitable for high internal pressures, wherein the internal pressure depends primarily on the CO 2 content of the beverage.
  • An advantageous development therefore provides that the bottom construction is designed to withstand an internal pressure of the bottle at a CO 2 concentration of up to 5 g / l at a temperature of 20 ° C.
  • FIG.1 a plastic bottle from the side
  • Fig.2 a bottom view of the bottle
  • Figure 3 a sectional view taken along the line III-III of Fig. 2 ,
  • Fig.1 is a plastic bottle, in particular PET bottle 1, which has a side wall 2 and an integrally formed with the side wall 2 bottom 3.
  • the bottleneck 4 has an external thread, not shown, onto which the screw cap 5 is screwed.
  • a bottom view of the bottom 3 is shown.
  • the bottom 3 has an annular edge portion 6, with which the bottle can stand on a substrate. Between the edge portion 6 and the concave portion 7, an annular recess 8 is provided.
  • the concave portion 7 has outwardly curved, that is convex portions 9, each one adjacent to a footprint portion 10, laterally adjoining the formed parallel to the footprint portion 10 adjacent curved portions 11 and radially inwardly to the parallel to the footprint formed portion 10 subsequent have curved portions 12. Between the outwardly curved regions 9 and the central, inwardly curved region 13, an annular recess 14 is likewise arranged.

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

Description

Die Erfindung betrifft eine Bodenkonstruktion für eine Kunststoffflasche, insbesondere für unter Druck stehende Getränke, umfassend einen ringförmigen Randabschnitt, der vorzugsweise einstückig mit der Seitenwand der Flasche ausgebildet ist, und einen vom Randabschnitt umgebenen und mit diesem aus einem Stück bestehenden konkaven Abschnitt, wobei der konkave Abschnitt sternförmig angeordnete, seine Starrheit erhöhenden Verstärkungselemente aufweist.The invention relates to a bottom construction for a plastic bottle, in particular for pressurized beverages, comprising an annular edge portion, which is preferably formed integrally with the side wall of the bottle, and surrounded by the edge portion and integral with this one concave portion, wherein the concave Section star-shaped, has its rigidity enhancing reinforcing elements.

Weiters betrifft die Erfindung eine Kunststoffflasche für unter Druck stehende Getränke mit einer Bodenkonstruktion, deren ringförmiger Randabschnitt vorzugsweise einstückig mit der Seitenwand der Flasche ausgebildet ist.Furthermore, the invention relates to a plastic bottle for pressurized drinks with a bottom construction, the annular edge portion is preferably formed integrally with the side wall of the bottle.

Eine Bodenkonstruktion der eingangs genannten Art ist beispielsweise der DE-OS 1801368 zu entnehmen.A floor construction of the type mentioned is, for example, the DE-OS 1801368 refer to.

Flaschen aus Kunststoff sind nur unter bestimmten konstruktiven Voraussetzungen zur Aufnahme und Lagerung von unter Druck stehenden Getränken od. dgl. geeignet. Eine der hauptsächlichen Schwierigkeiten, die sich bei der Verwendung von Flaschen aus Kunststoff zu dem genannten Zweck ergeben, besteht darin, dass der mittlere Teil des Flaschenbodens dazu neigt, sich über den Rand des Bodens hinweg nach außen durchzubiegen bzw. vorzuwölben, sodass die Standfestigkeit solcher Flaschen beeinträchtigt wird. Um ein Durchbiegen zu vermeiden, ist es bekannt geworden, den Flaschenboden als sogenannten Champagnerboden oder als Petaloidboden auszubilden. Beim Champagnerboden ist der Flaschenboden nach innen gewölbt und kann dadurch einem bestimmten Innendruck standhalten ohne sich durchzubiegen. Der Champagnerboden ist besonders bei Glasflaschen üblich. Bei Kunststoffflaschen hängt die Eignung für unter Druck stehende Getränke entscheidend von der Wandstärke des Bodens ab. Ist die Wandstärke zu dünn, so ist die Konstruktion zu flexibel und ein übermäßiges Verwölben des Flaschenbodens kann nicht verhindert werden. Ist die Wandstärke hingegen zu dick, ist der Materialverbrauch groß und die Herstellungskosten sowie das Gewicht der Flasche zu hoch. Champagnerboden der herkömmlichen Art sind daher ab einer gewissen CO2-Konzentration des Getränks aus wirtschaftlicher Sicht nicht einsetzbar. Beim Petaloidboden weist der Boden, sich bis in die Seitenwände hinauf erstreckende Einschnürungen auf, zwischen denen gewölbte, blütenblätterartig geformte Felder ausgebildet sind. Petaloidböden sind besonders bei Kunststoffflaschen weit verbreitet und halten einem hohen Inndruck auch bei einer verhältnismäßig geringen Wandstärke des Bodens stand. Nachteilig sind aber die geringere Standfestigkeit und insbesondere der geringere statische Kippwinkel, sodass die Gefahr eines Umfallen der Flasche größer ist als bei einer vergleichbaren Flasche mit Champagnerboden. Außerdem wird das äußere Erscheinungsbild der Flasche durch die sich bis in die Seitenwand hinauf erstreckenden Petaloidfelder beeinträchtigt.Plastic bottles are od only under certain design conditions for receiving and storage of pressurized drinks. Like. Suitable. One of the major difficulties associated with the use of plastic bottles for the stated purpose is that the center portion of the bottle bottom tends to bow outward beyond the edge of the bottom, so that the stability of such Bottles is impaired. In order to avoid sagging, it has become known to form the bottom of the bottle as so-called champagne or as a petaloid floor. In the case of champagne, the bottom of the bottle is curved inwards and can thus withstand a certain internal pressure without sagging. The champagne flute is especially common with glass bottles. For plastic bottles, the suitability for pressurized drinks depends decisively on the wall thickness of the floor. If the wall thickness is too thin, the construction is too flexible and excessive cambering of the bottom of the bottle can not be prevented. On the other hand, if the wall thickness is too thick, the material consumption is great and the manufacturing costs and the weight of the bottle too high. Champagne ground of the conventional type are therefore from a certain CO 2 concentration of the beverage from an economic point of view can not be used. In the case of the petaloid, the soil has constrictions extending up to the side walls, between which arched, petal-like shaped fields are formed. Petaloid soils are particularly common in plastic bottles and withstand a high pressure even at a relatively low wall thickness of the soil. However, the disadvantage is the lower stability and in particular the lower static tilt angle, so that the risk of falling over of the bottle is greater than in a comparable bottle with champagne. In addition, the appearance of the bottle is affected by the petaloid fields extending up to the side wall.

Es wurden bereits verschiedene Versuche unternommen, die Festigkeit bzw. Starrheit von Champagnerböden für den Einsatz bei Kunststoffflaschen zu verbessern. Der DE-OS 1801368 sind beispielsweise im konkaven Flaschenboden verwirklichte, sternförmig angeordnete Versteifungsrippen zu entnehmen, die jedoch einen überaus hohen Materialverbrauch zur Folge haben, da die Versteifungsrippen aus zusätzlich zum Bodenmaterial aufgebrachtem Material bestehen, sodass auch das Gewicht der Flasche erhöht wird. Darüber hinaus ist auch die Herstellung eines solchen Flaschenbodens wesentlich aufwändiger als die Herstellung eines einfachen Champagnerbodens.Various attempts have been made to improve the strength and rigidity of champagne flakes for use with plastic bottles. Of the DE-OS 1801368 For example, realized in the concave bottle bottom, star-shaped arranged stiffening ribs, which, however, have an extremely high material consumption result because the stiffening ribs made of material applied in addition to the soil material, so that the weight of the bottle is increased. In addition, the production of such a bottle bottom is much more complex than the production of a simple champagne flute.

Aus der US 2007/231530 A1 geht eine Basis für einen Kunststoffbehälter gemäß dem Oberbegriff des Anspruchs 1, mit einer zentralen vertikalen Achse hervor, wobei die Basis einen äußeren ringförmigen Bereich zum Tragen des Behälters auf einer Oberfläche, einen mittigen Bereich, der um die mittige vertikale Achse vorgesehen ist, und einen Basisbereich, welcher sich zwischen dem ringförmigen Bereich und dem mittigen Unterstützungsbereich erstreckt, umfasst. Der Basisbereich hat zumindest zwei Vorsprünge aufzuweisen, welche sich radial von einer Position benachbart zu dem ringförmigen Bereich in Richtung des mittigen Bereichs erstrecken, wobei jeder Vorsprung zumindest zwei gestufte Segmente zu umfassen hat. Behältnisse, die mit einer derartigen Basis ausgestattet sind, sollen über eine verbesserte Dimensionsstabilität verfügen.From the US 2007/231530 A1 is a base for a plastic container according to the preamble of claim 1, with a central vertical axis, said base having an outer annular portion for supporting the container on a surface, a central region which is provided about the central vertical axis, and a Base region, which extends between the annular region and the central support region comprises. The base region has at least two protrusions extending radially from a position adjacent to the annular region toward the central region, each protrusion having to comprise at least two stepped segments. Containers equipped with such a base should have improved dimensional stability.

Die WO 2007/060529 A2 betrifft einen Behälter aus einer druckgeformten Vorform mit einer Basis, wobei die Dicke der Basis im Bereich der Hauptachse kleiner oder gleich dem 8,2-fachen der Dicke der Behälterseitenwand zu sein hat. In einer möglichen Ausgestaltung kann die Auflagefläche der Basis über einen im Wesentlichen kontinuierlichen ringförmigen Abschnitt verfügen, der einen konvexen, nach innen weisenden Bereich des Behälters umgibt. Mit den in der WO 2007/060529 beschriebenen Behältnissen soll es möglich sein, die Menge an Kunststoff, die für deren Herstellung erforderlich ist, zu verringern.The WO 2007/060529 A2 relates to a container of a compression molded preform having a base, wherein the thickness of the base in the region of the major axis has to be less than or equal to 8.2 times the thickness of the container sidewall. In one possible embodiment, the support surface of the base may have a substantially continuous annular portion surrounding a convex, inwardly facing portion of the container. With the in the WO 2007/060529 described containers, it should be possible to reduce the amount of plastic that is required for their production.

Die vorliegende Erfindung zielt daher darauf ab, eine Bodenkonstruktion für eine Kunststoffflasche derart weiterzubilden, dass die Flasche bei geringem Gewicht und geringem Materialverbrauch auch für die Aufnahme von unter hohem Druck stehenden Getränken geeignet ist. Die Verstellung soll einfach, kostengünstig und automatisiert mit kurzen Taktzeiten möglich sein. Weiters soll die Flasche ein ansprechendes und hochwertiges Erscheinungsbild haben und insbesondere soll die Bodenkonstruktion keine Einschränkungen beim Design der flaschenform mit sich bringen.The present invention therefore aims to develop a bottom construction for a plastic bottle such that the bottle is suitable for low-pressure and low consumption of material for the absorption of high-pressure drinks. The adjustment should be simple, inexpensive and automated with short cycle times possible. Furthermore, the bottle should have a pleasing and high-quality appearance and in particular the floor construction should bring no restrictions on the design of the bottle shape with it.

Zur Lösung dieser Aufgabe sieht die Erfindung eine Bodenkonstruktion gemäß den Merkmalen des Patentanspruchs 1 vor.To solve this problem, the invention provides a floor construction according to the features of claim 1.

Die Bodenkonstruktion geht somit von der Form eines Champagnerbodens aus, wobei die Erfindung Elemente zur Versteifung des konkaven Bodenabschnitts dergestalt vorschlägt, dass der Materialverbrauch gegenüber einem einfachen Champagnerboden nicht oder nur unwesentlich erhöht wird. Die erfingdungsgemäß vorgesehenen Versteifungselemente führen an keiner Stelle zu Materialverdickungen, da sie lediglich von nach außen gewölbten Bereichen des konkaven Bodenabschnitts gebildet sind. Dabei hat sich überraschend gezeigt, dass solche Versteifungsbereiche auch bei sehr geringer Wandstärke des Bodens zu einer überaus steifen Konstruktion führen, bei der auch sehr hohe Innendrücke der Flasche kein Auswölben des Bodens verursachen können.The floor construction is thus based on the shape of a champagne flute, with the invention proposing elements for stiffening the concave bottom section in such a way that the material consumption is not or only slightly increased compared to a simple champagne flute. The reinforcing elements provided according to the invention do not lead to thickening of the material at any point, since they are formed only by outwardly curved regions of the concave bottom section. It has surprisingly been found that such stiffening areas lead even at very low wall thickness of the soil to a very rigid construction in which even very high internal pressures of the bottle can not cause buckling of the soil.

Aufgrund der Bodenkonstruktion kann die Kunststoffflasche in einfacher Weise mit herkömmlichen und erprobten Verfahren hergestellt werden. Insbesondere bei Flaschen aus Polyethylenterephthalat (PET) erfolgt die Herstellung in bevorzugter Weise aus einer sogenannten PET-Preform, einer spritzgegossenen Vorform. Der Weg von einer PET-Preform zur PET-Flasche durchläuft dabei folgende Schritte: Die Preform wird zunächst erwärmt, das heißt es wird ein Temperaturprofil entsprechend der gewünschten Wanddickenverteilung in die Preform eingebracht. Hierzu können beispielsweise Infrarotwärmestrahler eingesetzt werden. Danach wird die Preform in ein meist dreiteiliges Formwerkzeug eingespannt und ein Dorn fährt in die Preform und streckt sie auf die endgültige Länge der Flasche. Druckluft bläst den entstandenen Schlauch in die endgültige Form, wonach die Temperatur der Flasche durch Kühlung des Werkzeugs unter die Glasübergangstemperatur gebracht wird. Schließlich öffnet sich das Formwerkzeug und die fertige Flasche wird ausgeworfen.Due to the bottom construction, the plastic bottle can be easily manufactured by conventional and proven methods. Particularly in the case of bottles made of polyethylene terephthalate (PET), the production preferably takes place from a so-called PET preform, an injection-molded preform. The way from a PET preform to the PET bottle goes through the following steps: The preform is first heated, ie a temperature profile corresponding to the desired wall thickness distribution is introduced into the preform. For example, infrared heat radiators can be used for this purpose. Thereafter, the preform is clamped in a mostly three-part mold and a mandrel moves into the preform and stretches it to the final length of the bottle. Compressed air blows the resulting tube into the final shape, after which the temperature of the bottle is brought below the glass transition temperature by cooling the tool. Finally, the mold opens and the finished bottle is ejected.

Zur Verwirklichung der erfindungsgemäßen Bodenkonstruktion muss lediglich das Formwerkzeug im Bereich des Bodens entsprechend adaptiert werden, wobei der grundsätzliche Verfahrensablauf aber gleich bleibt und insbesondere keine zusätzlichen Verfahrensschritte erforderlich sind. Bei dem beschriebenen Herstellungsverfahren kann der konkave Abschnitt einschließlich der nach außen gewölbten Bereiche in einfacher Weise mit einer im Wesentlichen einheitlichen Wandstärke ausgebildet werden. "Im Wesentlichen" bedeutet hierbei, dass geringfügige Unterschiede der Wandstärke herstellungsbedingt auftreten können, etwa dadurch, dass beim Anpressen der Preform an das Formwerkzeug das Material in den nach außen gewölbten Bereichen stärker gestreckt wird als in benachbarten Bereichen, sodass der Boden in diesen Bereichen geringfügig dünner sein kann.To realize the floor construction according to the invention, only the molding tool in the area of the floor has to be adapted accordingly, but the basic procedure remains the same and, in particular, no additional method steps are required. In the described manufacturing method, the concave portion including the convex portions can be easily formed with a substantially uniform wall thickness. "Essentially" here means that slight differences in the wall thickness can occur due to the production, such as the fact that when pressing the preform to the mold, the material is stretched more in the outwardly arched areas than in adjacent areas, so that the floor may be slightly thinner in these areas.

Die nach außen gewölbten Bereiche sind bevorzugt länglich ausgebildet, d.h. das ihre Erstreckung in radialer Richtung größer ist als in Umfangsrichtung. Dies führt zu einer besonders stabilen Bodenkonstruktion.The outwardly curved portions are preferably elongated, i. that their extent in the radial direction is greater than in the circumferential direction. This leads to a particularly stable floor construction.

Gemäß einer bevorzugten Weiterbildung der Erfindung sind die nach außen gewölbten Bereiche in Umfangsrichtung voneinander beabstandet. Die nach außen gewölbten Bereiche sind insbesondere in Umfangsrichtung gleichmäßig verteilt, wobei z.B. sechs Bereiche vorgesehen sind. Denkbar sind je nach Durchmesser der Flasche aber auch 3,4,5,7,8,9,10,11 oder 12 Bereiche.According to a preferred embodiment of the invention, the outwardly curved areas are spaced apart in the circumferential direction. The outwardly curved regions are evenly distributed in the circumferential direction, e.g. six areas are provided. Conceivable, depending on the diameter of the bottle but also 3,4,5,7,8,9,10,11 or 12 areas.

Neben der Verstärkung des konkaven Bodenabschnitts können die nach außen gewölbten Bereiche auch als Aufstandsfläche der Flasche dienen. Zu diesem Zweck ist die Ausbildung bevorzugt derart getroffen, dass die nach außen gewölbten Bereiche einen zu einer Aufstandsfläche parallelen oder eine Aufstandsfläche ausbildenden Abschnitt umfassen. Der zur Aufstandsfläche parallele Abschnitt kann dabei beispielsweise eine zur Aufstandsfläche vorragende Noppe oder dgl. aufweisen.In addition to the reinforcement of the concave bottom portion, the outwardly curved areas can also serve as footprint of the bottle. For this purpose, the embodiment is preferably such that the outwardly curved regions comprise a section parallel to a footprint or forming a footprint. The parallel to the footprint section may, for example, a projecting to the footprint protrusion or the like ..

Alternativ oder zusätzlich zur Aufstandsfläche, die von den erwähnten Abschnitten der nach außen gewölbten Versteifungsbereichen gebildet sind, kann die Flasche aber in herkömmlicher Weise auch am Rand des Bodens stehen. Die Ausbildung ist dann so getroffen, dass der ringförmige Randabschnitt der Bodenkonstruktion eine Aufstandsfläche der Bodenkonstruktion aufweist. Es ergibt sich somit ein Bodenkontakt des Flaschenbodens wie bei einer herkömmlichen Flasche mit Champagnerboden entlang des Bodenrandes. Dadurch kann ästhetischen Anforderungen Rechnung getragen werden und so wie bei einer Champagnerflasche ein hochwertiges Flaschendesign verwirklicht werden, bei dem die Seitenwände der Flasche frei gestaltbar bis zum Boden verlaufen ohne dass Versteifungselemente oder dgl. sichtbar wären.Alternatively, or in addition to the footprint, which are formed by the mentioned portions of the outwardly curved stiffening regions, but the bottle can also be in the conventional manner at the edge of the soil. The formation is then made such that the annular edge portion of the floor construction has a footprint of the floor construction. This results in a ground contact of the bottle bottom as in a conventional bottle with champagne ground along the bottom edge. As a result, aesthetic requirements can be taken into account and, as in the case of a champagne bottle, a high-quality bottle design can be realized in which the sidewalls of the bottle run freely to the floor without stiffening elements or the like being visible.

Gute Versteifungseigenschaften ergeben sich, wenn, wie dies einer bevorzugten Weiterbildung entspricht, die nach außen gewölbten Bereiche seitlich und radial innen an den parallel zur Aufstandsfläche ausgebildeten oder eine Aufstandsfläche ausbildenden Abschnitt anschließende gekrümmte Abschnitte umfassen.Good stiffening properties result if, as corresponds to a preferred development, the outwardly curved areas laterally and radially inward on the comprise curved sections which are formed parallel to the footprint or which form a footprint.

Eine weitere Verbesserung der Stabilität der Bodenkonstruktion ergibt sich bevorzugt dadurch, dass die nach außen gewölbten Bereiche einen nach innen gewölbten zentralen Bereich umgeben.A further improvement in the stability of the floor construction preferably results from the fact that the outwardly curved areas surround an inwardly curved central area.

Eine weitere Verbesserung der Stabilität der Bodenkonstruktion ergibt sich weiters dadurch, dass die Bodenkonstruktion zwischen den nach außen gewölbten Bereichen und dem Randabschnitt, insbesondere benachbart zum Randabschnitt, mindestens eine ringförmige Vertiefung aufweist.A further improvement in the stability of the floor construction results furthermore from the fact that the floor construction has at least one annular recess between the outwardly curved areas and the edge section, in particular adjacent to the edge section.

Eine weitere Verbesserung der Stabilität der Bodenkonstruktion ergibt sich bevorzugt auch dadurch, dass die Bodenkonstruktion zwischen den nach außen gewölbten Bereichen und dem nach innen gewölbten zentralen Bereich mindestens eine ringförmige Vertiefung aufweist.A further improvement in the stability of the floor construction preferably results from the fact that the floor construction has at least one annular recess between the outwardly curved areas and the inwardly curved central area.

Eine weitere Verbesserung der Stabilität der Bodenkonstruktion ergibt sich weiters bevorzugt dadurch, dass die Bodenkonstruktion zwischen den nach außen gewölbten Bereichen und dem nach innen gewölbten zentralen Bereich eine ringförmige Vertiefung aufweist.A further improvement in the stability of the floor construction is further preferred in that the floor construction has an annular recess between the outwardly curved areas and the inwardly curved central area.

Bevorzugt weisen die nach außen gewölbten Bereiche dabei eine radiale Erstreckung auf, die im Wesentlichen dem radialen Abstand zwischen dem Randabschnitt und dem zentralen Bereich entspricht, wodurch eine maximale Versteifung erzielt wird.In this case, the outwardly curved regions preferably have a radial extension which essentially corresponds to the radial distance between the edge section and the central region, as a result of which maximum stiffening is achieved.

Wie bereits erwähnt, soll die erfindungsgemäße Bodenkonstruktion für hohe Innendrucke geeignet sein, wobei der Innendruck in erster Linie vom CO2-Gehalt des Getränks abhängt. Eine vorteilhafte Weiterbildung sieht daher vor, dass die Bodenkonstruktion ausgebildet ist, um einem Innendruck der Flasche bei einer CO2-Konzentration von bis zu 5g/l bei einer Temperatur von 20°C standzuhalten.As already mentioned, the floor construction according to the invention should be suitable for high internal pressures, wherein the internal pressure depends primarily on the CO 2 content of the beverage. An advantageous development therefore provides that the bottom construction is designed to withstand an internal pressure of the bottle at a CO 2 concentration of up to 5 g / l at a temperature of 20 ° C.

Um eine kostengünstige, einen geringen Materialverbrauch verursachende und leichte Konstruktion zu erreichen, muss auf eine entsprechend geringe Wandstärke geachtet werden, wobei jedoch gleichzeitig die Wandstärke aus Stabilitätsgründen nicht beliebig verringert werden kann. Bevorzugt ist in diesem Zusammenhang eine Ausführungsform, bei der der ringförmige Randabschnitt und/oder eine durchschnittliche Wandstärke kleiner oder gleich 1,95 mm, vorzugsweise 1,5 mm, aufweist, insbesondere der konkave Abschnitt an keiner Stelle eine Wandstärke von 1,95 mm, bevorzugt 1,5 mm, bevorzugt 1 mm überschreitet.In order to achieve a cost-effective, a low material consumption causing and lightweight construction, care must be taken to a correspondingly small wall thickness, but at the same time the wall thickness can not be arbitrarily reduced for stability reasons. Preferred in this context is an embodiment, in which the annular edge portion and / or an average wall thickness less than or equal to 1.95 mm, preferably 1.5 mm, in particular the concave portion at any point a wall thickness of 1.95 mm, preferably 1.5 mm, preferably 1 mm exceeds.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles näher erläutert. In dieser zeigt Fig.1 eine Kunststoffflasche von der Seite, Fig.2 eine Unteransicht der Flasche und Fig.3 eine Schnittansicht gemäß der Linie III-III der Fig. 2.The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. In this shows Fig.1 a plastic bottle from the side, Fig.2 a bottom view of the bottle and Figure 3 a sectional view taken along the line III-III of Fig. 2 ,

In Fig.1 ist eine Kunststoffflasche, insbesondere PET-Flasche 1 dargestellt, die eine Seitenwand 2 und einen einstückig mit der Seitenwand 2 ausgebildeten Boden 3 aufweist. Der Flaschenhals 4 hat ein nicht dargestelltes Außengewinde, auf das die Schraubkappe 5 geschraubt ist.In Fig.1 is a plastic bottle, in particular PET bottle 1, which has a side wall 2 and an integrally formed with the side wall 2 bottom 3. The bottleneck 4 has an external thread, not shown, onto which the screw cap 5 is screwed.

In Fig.2 ist eine Unteransicht des Bodens 3 dargestellt. Der Boden 3 weist einen ringförmigen Randabschnitt 6 auf, mit welchem die Flasche auf einem Untergrund stehen kann. Zwischen dem Randabschnitt 6 und dem konkaven Abschnitt 7 ist eine ringförmige Vertiefung 8 vorgesehen. Der konkave Abschnitt 7 weist nach außen gewölbte, also konvexe Bereiche 9 auf, die jeweils einen zu einer Aufstandsfläche parallelen Abschnitt 10, seitlich an den parallel zur Aufstandsfläche ausgebildeten Abschnitt 10 anschließende gekrümmte Abschnitte 11 und radial innen an den parallel zur Aufstandsfläche ausgebildeten Abschnitt 10 anschließende gekrümmte Abschnitte 12 aufweisen. Zwischen den nach außen gewölbten Bereichen 9 und dem zentralen, nach innen gewölbten Bereich 13 ist ebenfalls eine ringförmige Vertiefung 14 angeordnet.In Fig.2 a bottom view of the bottom 3 is shown. The bottom 3 has an annular edge portion 6, with which the bottle can stand on a substrate. Between the edge portion 6 and the concave portion 7, an annular recess 8 is provided. The concave portion 7 has outwardly curved, that is convex portions 9, each one adjacent to a footprint portion 10, laterally adjoining the formed parallel to the footprint portion 10 adjacent curved portions 11 and radially inwardly to the parallel to the footprint formed portion 10 subsequent have curved portions 12. Between the outwardly curved regions 9 and the central, inwardly curved region 13, an annular recess 14 is likewise arranged.

In der Querschnittsdarstellung gemäß Fig.3 sind die Wölbungen der einzelnen gewölbten Bereiche 9 besser ersichtlich und es ist weiters ersichtlich, dass die Wandstärke bzw. die Materialstärke des Bodens 3 überall im Wesentlichen gleich ist.In the cross-sectional view according to Figure 3 the bulges of the individual curved areas 9 can be seen more clearly and it can further be seen that the wall thickness or the material thickness of the floor 3 is substantially the same everywhere.

Die in der vorstehenden Beschreibung, in den Ansprüchen sowie in den Zeichnungen offenbarten Merkmale der Erfindung können sowohl einzeln aus auch in jeder beliebigen Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features of the invention disclosed in the foregoing description, in the claims and in the drawings may be essential both individually and in any combination for the realization of the invention in its various embodiments.

Claims (16)

  1. A base structure for a plastic bottle, in particular for pressurized beverages, comprising an annular edge portion (6) and a concave portion (7) which is surrounded by the edge portion (6) and is made in one piece therewith, wherein the concave portion (7) has reinforcing elements which are arranged in a star shape and which increase the rigidity thereof, wherein the reinforcing elements are formed by outwardly curved regions (9) of the concave portion (7) and the concave portion (7) including the outwardly curved regions (9) is formed with a substantially uniform wall thickness, characterized in that the base structure has at least one annular depression (8) between the outwardly curved regions and the edge portion (6).
  2. The base structure according to claim 1, characterized in that the outwardly curved regions (9) are spaced apart from one another in the circumferential direction.
  3. The base structure according to claim 1 or 2, characterized in that the outwardly curved regions (9) comprise a portion (10) which is parallel to a contact area or which forms a contact area.
  4. The base structure according to claim 1, 2 or 3, characterized in that the annular edge portion (6) has a contact area of the base structure.
  5. The base structure according to claim 3 or 4, characterized in that the outwardly curved regions (9) comprise curved portions (11, 12) which are adjacent, laterally and in the radially inward direction, to the portion (10) which is formed parallel to the contact area or which forms a contact area.
  6. The base structure according to any of claims 1 to 5, characterized in that the outwardly curved regions (9) surround an inwardly curved central region (13).
  7. The base structure according to any of claims 1 to 6, characterized in that the base structure has the annular depression (8) adjacent to the edge portion (6), and/or in that the annular edge portion (6) is formed in one piece with the side wall (2) of the bottle.
  8. The base structure according to claim 6 or 7, characterized in that the base structure has at least one annular depression (14) between the outwardly curved regions (9) and the inwardly curved central region (13).
  9. The base structure according to claim 6, 7 or 8, characterized in that the outwardly curved regions (9) have a radial dimension which corresponds substantially to the radial distance between the edge portion (6) and the central region (13).
  10. The base structure according to any of claims 1 to 9, characterized in that the outwardly curved regions (9) are of elongate shape, the dimension thereof in the radial direction being larger than the dimension thereof in the circumferential direction.
  11. The base structure according to any of claims 1 to 10, characterized in that the annular edge portion (6) and/or the concave portion (7) has an average wall thickness of less than or equal to 1.95 mm, preferably less than or equal to 1.5 mm, and in particular at no point exceeds a wall thickness of 1.95 mm, preferably 1.5 mm, preferably 1 mm.
  12. The base structure according to any of claims 1 to 11, characterized in that the base structure is designed to withstand an internal pressure of the bottle at a CO2 concentration of up to 5 g/l at a temperature of 20°C.
  13. The base structure according to any of claims 1 to 12, characterized in that the edge portion (6) and/or the concave portion (7) comprises polyethylene terephthalate (PET) or consists of polyethylene terephthalate (PET).
  14. A plastic bottle for pressurized beverages, having a base structure according to any of claims 1 to 13, the annular edge portion (6) of which is preferably formed in one piece with the side wall (2) of the bottle.
  15. The plastic bottle according to claim 14, characterized in that the plastic bottle along with the base structure comprises polyethylene terephthalate (PET) or consists of polyethylene terephthalate (PET).
  16. The plastic bottle according to claim 14 or 15, characterized in that the plastic bottle is produced from an injection-moulded preform by inflating against a mould.
EP11758410.2A 2010-09-22 2011-09-21 Bottom structure for a plastic bottle Not-in-force EP2619097B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1577/2010A AT510506B1 (en) 2010-09-22 2010-09-22 FLOOR CONSTRUCTION FOR A PLASTIC BOTTLE
PCT/EP2011/004717 WO2012038075A1 (en) 2010-09-22 2011-09-21 Bottom structure for a plastic bottle

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EP2619097A1 EP2619097A1 (en) 2013-07-31
EP2619097B1 true EP2619097B1 (en) 2016-03-16

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EP (1) EP2619097B1 (en)
JP (1) JP5921553B2 (en)
CN (1) CN103180212B (en)
AT (1) AT510506B1 (en)
AU (1) AU2011304660B2 (en)
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WO (1) WO2012038075A1 (en)

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US9580206B2 (en) 2017-02-28
AU2011304660A1 (en) 2013-04-11
WO2012038075A1 (en) 2012-03-29
US20130270214A1 (en) 2013-10-17
CN103180212A (en) 2013-06-26
BR112013006898A2 (en) 2016-07-12
AT510506B1 (en) 2013-01-15
JP5921553B2 (en) 2016-05-24
JP2013538760A (en) 2013-10-17
CN103180212B (en) 2016-12-28
AU2011304660B2 (en) 2015-05-14
AT510506A1 (en) 2012-04-15
EP2619097A1 (en) 2013-07-31

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