WO2002098631A1 - Method for molding a plastic bottle with a shaped bottom and resulting bottle - Google Patents

Method for molding a plastic bottle with a shaped bottom and resulting bottle Download PDF

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Publication number
WO2002098631A1
WO2002098631A1 PCT/ES2002/000272 ES0200272W WO02098631A1 WO 2002098631 A1 WO2002098631 A1 WO 2002098631A1 ES 0200272 W ES0200272 W ES 0200272W WO 02098631 A1 WO02098631 A1 WO 02098631A1
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WO
WIPO (PCT)
Prior art keywords
bottle
mold
preform
male
molding
Prior art date
Application number
PCT/ES2002/000272
Other languages
Spanish (es)
French (fr)
Inventor
Jose Luis GÓMEZ CAO
Original Assignee
Gomez Cao Jose Luis
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gomez Cao Jose Luis filed Critical Gomez Cao Jose Luis
Publication of WO2002098631A1 publication Critical patent/WO2002098631A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C49/541—Moulds for undercut articles having a recessed undersurface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the new molding procedure of a plastic bottle comprises two consecutive phases of forming, an initial blowing of the bottle and a hot sausage of part thereof in order to obtain a bottle with the hollowed bottom, the thickness of which is the walls suitable for resisting internal pressures, for example containing carbonated beverages, without said bottom or part of it being significantly deformed.
  • the plastic bottles are preferably manufactured by blowing, starting from a plastic preform obtained by injection where the neck, neck and a balloon with the amount of material that will constitute the body.
  • the preform is introduced into a mold and is adequately heated until the plasticity of the material is obtained, so that, through the injection of air inside, the plastic material expands into the mold adapting to its surface Conforming the bottle.
  • the mold is opened and the bottle is ejected.
  • the bottles obtained with this method have their thin walls and a thickness that may not be uniform, depending on the temperature distribution reached by the preform in its various parts during molding.
  • the molding process of a plastic bottle with shaped bottom and bottle thus obtained object of the present registration is characterized in that it comprises a process according to which a preform blow is performed with a distribution of heating temperatures that encourages the creation of the Bottom walls of the bottle with a greater thickness.
  • a male is introduced into the mold, affecting the base of the bottle, the shapes of said male being suitable for the figure to be given to the base hollowed out concave.
  • the objective of the present process of new invention is to obtain a plastic bottle to contain carbonated beverages preferably and which has a concave hollow in its lower part in varying ways, in order to enable the housing of the neck of another equal bottle in a possible stacking of it.
  • the bottle obtained has among its qualities a sufficiently high resistance to internal pressure, which can reach 12 atmospheres, without said bottom deforming or losing the original cupping by bulging excessively.
  • Figure 1. Shows the step of introducing the preform into the mold.
  • Figure 2. Shows the heating step of the mold and expansion of the preform by blowing.
  • Figure 3. Shows the conformation step of the bottom of the bottle by drawing the male.
  • Figure 4. Shows the extraction step of the shaped bottle.
  • Figure 5. Shows a background example of a bottle.
  • the procedure consists of a first step in which the preform (1) is introduced into the mold (2 and 3) and is held by the neck and the neck, the mold (2 and 3) being closed.
  • the mold (2 and 3) is heated (4) so that the preform (1) acquires a gradually proportional temperature distribution from the proximity of the neck where the maximum temperature is produced to the base or end that will form the bottom of the bottle (6), until a sufficient creep state is achieved for its blowing.
  • This operation it is ensured that the injection of air produces in the bottom (5) a lower distension of the material than in the opposite part and therefore a smaller decrease in the thickness of the wall when expanding with respect to other parts of the body of the bottle .
  • the bottom of the mold (2 and 3) is configured as a preferably flat or flat surface, obtaining a provisional conformation of the bottle by expanding and occupying the entire inner surface of the mold (2 and 3).
  • a male (3) or punch is introduced into the mold (2) whose shape corresponds to the shape that is desired to be transmitted to the bottom (5) of the container, either cylindrical, conical or ribbed. This operation is carried out with the plastic material still in a flowing state, resulting in a stretching of the material existing in the bottom (5) of the mold (2) and which, as already mentioned, is of greater thickness.
  • the male (3) and the parts of the mold (2) are removed and the final bottle (6) is removed.
  • the method of introducing the male (3) bottom shaper (5) can be articulated in the blowing machine itself by appropriate modifications in it, or it can be part of the package mold group itself incorporating all the elements that the system requires for automatic operation.

Abstract

The invention relates to a method for molding a plastic bottle with a shaped bottom and the resulting bottle. Said method involves initially blowing a preform of said bottle in a mold having shape of the outer contour, the length of said preform being subjected to variable heating with the aim of obtaining a wall whose material is thicker than the remaining parts of the body on the end part of the bottle pertaining to the bottom or base during the blowing operation. In a following step, said bottom of the bottle undergoes stretching by an axially moving core that is inserted into the mold when the bottle is still in flowing state, thereby forming a hollow in the bottom whose shape matches that of the head of the core. The bottom or base part of the resulting bottle has a hollow or concavity whose walls are structurally resistant to considerable internal pressures, for e.g., said bottle can contain carbonated or sparkling drinks.

Description

PROCEDIMIENTO DE MOLDEADO DE UNA BOTELLA DE PLÁSTICO CON FONDO CONFORMADO Y BOTELLA ASÍ OBTENIDA- MEMORIA DESCRIPTIVA. OBJETO DE LA INVENCIÓN. La presente solicitud de Patente de Invención tiene por objeto el registro de un procedimiento de moldeado de una botella de plástico con fondo conformado y botella así obtenida que incorpora notables innovaciones y ventajas frente a los actuales procedimientos de moldeado de botellas de plástico para obtener formas novedosas y tecnológicamente apropiadas, especialmente para contener bebidas carbónicas a presión. MOLDING PROCEDURE OF A PLASTIC BOTTLE WITH CONFORMED FUND AND BOTTLE SO OBTAINED - DESCRIPTIVE MEMORY. OBJECT OF THE INVENTION The purpose of the present invention patent application is to register a molding procedure of a plastic bottle with a shaped bottom and a bottle thus obtained that incorporates notable innovations and advantages over the current molding procedures of plastic bottles to obtain novel shapes and technologically appropriate, especially to contain carbonated beverages under pressure.
Más concretamente el nuevo procedimiento de moldeado de una botella de plástico comprende dos fases consecutivas de conformación, un soplado inicial de la botella y un embutido en caliente de parte de la misma a fin de obtener una botella con el fondo ahuecado, siendo el grosor de las paredes adecuado a resistir presiones internas, por ejemplo contener bebidas carbónicas, sin que dicho fondo o parte de él se deforme notoriamente.More specifically, the new molding procedure of a plastic bottle comprises two consecutive phases of forming, an initial blowing of the bottle and a hot sausage of part thereof in order to obtain a bottle with the hollowed bottom, the thickness of which is the walls suitable for resisting internal pressures, for example containing carbonated beverages, without said bottom or part of it being significantly deformed.
ANTECEDENTES DE LA INVENCIÓN.BACKGROUND OF THE INVENTION
Actualmente las botellas de plástico se fabrican preferentemente por soplado, partiendo de una preforma de plástico obtenida por inyección donde se conforma el gollete, el cuello y un globo con la cantidad de material que constituirá el cuerpo. En un siguiente paso la preforma es introducida en un molde y se calienta de forma adecuada hasta obtener la plasticidad del material, para que, medíante la inyección de aire en su interior, el material plástico se expanda en el seno del molde adaptándose a su superficie conformándose la botella. Tras un leve periodo de enfriado, para su solidificación, el molde es abierto y la botella es expulsada. Las botellas obtenidas con este método presentan sus paredes delgadas y de un espesor que puede ser no uniforme, en dependencia de la distribución de la temperatura alcanzada por la preforma en sus diversas partes durante el moldeo.Currently the plastic bottles are preferably manufactured by blowing, starting from a plastic preform obtained by injection where the neck, neck and a balloon with the amount of material that will constitute the body. In a next step, the preform is introduced into a mold and is adequately heated until the plasticity of the material is obtained, so that, through the injection of air inside, the plastic material expands into the mold adapting to its surface Conforming the bottle. After a slight cooling period, for solidification, the mold is opened and the bottle is ejected. The bottles obtained with this method have their thin walls and a thickness that may not be uniform, depending on the temperature distribution reached by the preform in its various parts during molding.
Las botellas realizadas convencionalmente presentan formas más o menos globosas y nunca entrantes pronunciados sin que su resistencia estructural se vea afectada. Este efecto es más evidente en el caso de botellas que deben contener líquidos a presión, como por ejemplo las botellas de bebidas carbónicas o con gas, las cuales no pueden presentar huecos ni concavidades notorias en su parte inferior sin que la presión haga salir dicho fondo porque la estructura original de las paredes ha cedido. DESCRIPCIÓN DE LA INVENCIÓN.Conventionally made bottles have more or less globose shapes and never pronounced starters without their structural resistance being affected. This effect is more evident in the case of bottles that must contain pressurized liquids, such as for example carbonated or carbonated beverage bottles, which cannot have gaps or noticeable concavities in their lower part without the pressure causing said bottom because the original structure of the walls has yielded. DESCRIPTION OF THE INVENTION
El procedimiento de moldeado de una botella de plástico con fondo conformado y botella así obtenida objeto del presente registro, se caracteriza porque comprende un proceso según el cual se realiza un soplado de la preforma con una distribución de temperaturas de calefacción que fomenta la creación de las paredes del fondo de la botella con un mayor grosor. En un segundo paso y mientras el material está en estado fluyente con una conformación provisional de la botella se introduce dentro del molde un macho afectando la base de la botella, siendo las formas de dicho macho adecuadas a la figura que se desea dar a la base ahuecada cóncava. El objetivo del presente procedimiento de nueva invención consiste en la obtención de una botella de plástico para contener bebidas carbónicas preferentemente y que presenta en su parte inferior una ahuecamiento cóncavo de formas variables, a fin de posibilitar el alojamiento del gollete de otra botella igual en un posible apilado de la misma. La botella obtenida presenta entre sus cualidades una resistencia suficientemente elevada a la presión interna, que puede llegar a ser de 12 atmósferas, sin que dicho fondo se deforme o pierda el ahuecamiento original abombándose en exceso. Para completar la descripción que seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de sus características, se acompaña a la presente memoria descriptiva, de un juego de figuras, de forma ilustrativa y no limitativa, donde se representan los detalles más significativos de la invención. BREVE DESCRIPCIÓN DE LOS DISEÑOS.The molding process of a plastic bottle with shaped bottom and bottle thus obtained object of the present registration, is characterized in that it comprises a process according to which a preform blow is performed with a distribution of heating temperatures that encourages the creation of the Bottom walls of the bottle with a greater thickness. In a second step and while the material is in a flowing state with a provisional conformation of the bottle, a male is introduced into the mold, affecting the base of the bottle, the shapes of said male being suitable for the figure to be given to the base hollowed out concave. The objective of the present process of new invention is to obtain a plastic bottle to contain carbonated beverages preferably and which has a concave hollow in its lower part in varying ways, in order to enable the housing of the neck of another equal bottle in a possible stacking of it. The bottle obtained has among its qualities a sufficiently high resistance to internal pressure, which can reach 12 atmospheres, without said bottom deforming or losing the original cupping by bulging excessively. To complete the description that is going to be carried out below and in order to help a better understanding of its characteristics, this descriptive report is accompanied by a set of figures, in an illustrative and non-limiting way, where the details are represented more significant of the invention. BRIEF DESCRIPTION OF THE DESIGNS.
Figura 1.- Muestra el paso de introducción de la preforma en el molde. Figura 2.- Muestra el paso de calefacción del molde y expansión de la preforma por soplado.Figure 1.- Shows the step of introducing the preform into the mold. Figure 2.- Shows the heating step of the mold and expansion of the preform by blowing.
Figura 3.- Muestra el paso de conformación del fondo de la botella por embutición del macho.Figure 3.- Shows the conformation step of the bottom of the bottle by drawing the male.
Figura 4.- Muestra el paso de extracción de la botella conformada. Figura 5.- Muestra un ejemplo de fondo de una botella.Figure 4.- Shows the extraction step of the shaped bottle. Figure 5.- Shows a background example of a bottle.
DESCRIPCIÓN DE UNA REALIZACIÓN PREFERENTE.DESCRIPTION OF A PREFERRED EMBODIMENT.
El procedimiento consta de un primer paso en el que la preforma (1 ) se introduce en el molde (2 y 3) de soplado y se sujeta por el cuello y el gollete, cerrándose a continuación el molde (2 y 3). El molde (2 y 3) se caldea (4) de manera que la preforma (1) adquiera una distribución de temperaturas gradualmente proporcional desde la proximidad del cuello donde se produce la máxima temperatura hasta la base o extremo que conformará el fondo de la botella (6), hasta conseguir un estado de fluencia suficiente para su soplado. Con esta operación se asegura que la inyección de aire produzca en el fondo (5) una menor distensión del material que en la parte opuesta y por lo tanto una menor disminución del grosor de la pared al expandirse respecto a otras partes del cuerpo de la botella. En esta fase del procedimiento el fondo del molde (2 y 3) está configurado como una superficie preferentemente plana o llana, obteniéndose una conformación provisional de la botella al expandirse y ocupar toda la superficie interior del molde (2 y 3). En el siguiente paso del proceso de moldeado se introduce en el molde (2) un macho (3) o punzón cuya forma corresponde con la forma que se desea transmitir al fondo (5) del envase, ya sea cilindrica, cónica o con nervaduras. Esta operación se realiza con el material plástico todavía en estado fluyente, con lo que se produce un estirado del material existente en el fondo (5) del molde (2) y que, como ya se había mencionado, es de mayor grosor. Tras un enfriado en el que el material de la botella (6) consigue consistencia suficiente, se retiran el macho (3) y las partes del molde (2) y se extrae la botella (6) definitiva.The procedure consists of a first step in which the preform (1) is introduced into the mold (2 and 3) and is held by the neck and the neck, the mold (2 and 3) being closed. The mold (2 and 3) is heated (4) so that the preform (1) acquires a gradually proportional temperature distribution from the proximity of the neck where the maximum temperature is produced to the base or end that will form the bottom of the bottle (6), until a sufficient creep state is achieved for its blowing. With this operation it is ensured that the injection of air produces in the bottom (5) a lower distension of the material than in the opposite part and therefore a smaller decrease in the thickness of the wall when expanding with respect to other parts of the body of the bottle . In this phase of the process the bottom of the mold (2 and 3) is configured as a preferably flat or flat surface, obtaining a provisional conformation of the bottle by expanding and occupying the entire inner surface of the mold (2 and 3). In the next step of the molding process, a male (3) or punch is introduced into the mold (2) whose shape corresponds to the shape that is desired to be transmitted to the bottom (5) of the container, either cylindrical, conical or ribbed. This operation is carried out with the plastic material still in a flowing state, resulting in a stretching of the material existing in the bottom (5) of the mold (2) and which, as already mentioned, is of greater thickness. After cooling, in which the material of the bottle (6) achieves sufficient consistency, the male (3) and the parts of the mold (2) are removed and the final bottle (6) is removed.
El método de introducción del macho (3) conformador del fondo (5) puede estar articulado en la propia máquina de soplar mediante modificaciones oportunas en la misma, o bien, puede formar parte del propio grupo del molde del envase con incorporación de todos los elementos que el sistema requiera para su funcionamiento automático.The method of introducing the male (3) bottom shaper (5) can be articulated in the blowing machine itself by appropriate modifications in it, or it can be part of the package mold group itself incorporating all the elements that the system requires for automatic operation.
Evidentemente, el proceso de realización de un modelo de botella determinado deberá estudiarse para una perfecta coordinación entre la preforma, la distribución de temperaturas en el interior del molde y el macho de embutición del fondo y el automatismo de la máquina sopladora. Dicho forma del hueco formado por el macho en la botella puede ser de múltiples formas diferentes, aunque para su diseño se debe tener en cuenta facilitar el desmoldeo y que sea apto para resistir las presiones a las cuales se puede someter la botella. Obviously, the process of realizing a particular bottle model must be studied for a perfect coordination between the preform, the temperature distribution inside the mold and the bottom drawing male and the automatism of the blower machine. Said shape of the hole formed by the male in the bottle can be of multiple different forms, although for its design it should be taken into account to facilitate the demoulding and that it is suitable to resist the pressures to which the bottle can be subjected.

Claims

REIVINDICACIONES. CLAIMS.
1. -PROCEDIMIENTO DE MOLDEADO DE UNA BOTELLA DE PLÁSTICO CON1.-MOLDING PROCESS OF A PLASTIC BOTTLE WITH
FONDO CONFORMADO Y BOTELLA ASÍ OBTENIDA, del tipo de moldeado por soplado en el interior de un molde (2) de una preforma (1) o probeta obtenida por inyección de material plástico o similar, esencialmente caracterizado porque comprende los siguientes pasos:CONFORMED FUND AND BOTTLE SO OBTAINED, of the type of blow molding inside a mold (2) of a preform (1) or specimen obtained by injection of plastic or similar material, essentially characterized in that it comprises the following steps:
- Introducción de la preforma (1) en una matriz (2 y 3) de moldeado por soplado conformada preferentemente por partes (2) desplazables lateralmente y un macho (3) dispuesto axialmente y desplazable longitudinalmente hacia el interior de la cámara de soplado, sujetándose la probeta (1 ).- Introduction of the preform (1) into a blow molding matrix (2 and 3) preferably formed by laterally movable parts (2) and a male (3) arranged axially and longitudinally movable into the blow chamber, holding the test piece (1).
- Calentamiento (4) de la preforma (1) o probeta de forma variable hasta la total fluencia de la misma, sometiendo la preforma (1) a una variación de temperatura proporcional a su largo desde el cuello hasta el extremo opuesto correspondiente al fondo de la botella (6). - Soplado de la preforma (1 ) hasta la completa expansión en el interior del molde (2 y 3), encontrándose la cabeza del macho (3) enrasada con el fondo de las partes laterales del molde (2) preferentemente.- Heating (4) of the preform (1) or specimen in a variable way until its total creep, subjecting the preform (1) to a temperature variation proportional to its length from the neck to the opposite end corresponding to the bottom of the bottle (6). - Blowing of the preform (1) until complete expansion inside the mold (2 and 3), the head of the male (3) being flush with the bottom of the side parts of the mold (2) preferably.
- Introducción del macho (3) en el interior de la cámara del molde (2) estirando el material del fondo de la botella (6) aún en estado fluyente y conformando un ahuecamiento (5) en el mismo.- Insertion of the male (3) inside the mold chamber (2) by stretching the bottom material of the bottle (6) still in a flowing state and forming a recess (5) in it.
- Enfriado y extracción de la botella (6) mediante la retirada de las partes del molde (2) y el macho (3).- Cooling and extraction of the bottle (6) by removing the parts of the mold (2) and the male (3).
2.- PROCEDIMIENTO DE MOLDEADO DE UNA BOTELLA DE PLÁSTICO2.- MOLDING PROCEDURE OF A PLASTIC BOTTLE
CON FONDO CONFORMADO Y BOTELLA ASÍ OBTENIDA, de conformidad con la reivindicación 1 , caracterizado porque en el proceso de caldeo (4) de la preforma (1) en el interior del molde (2) el calentamiento de dicha preforma (1) se produce de forma gradual en toda su longitud, siendo la temperatura alcanzada ligeramente inferior en proximidad con la zona correspondiente al fondo de la botella (6), a fin de obtener una menor distensión del material y un mayor grosor de la pared tras el soplado; y porque el molde (2) de soplado comprende un macho (3) o punzón desplazable axialmente, de forma preferente, al interior de la cámara del molde (2) una vez expandida la botella (6), estirando dicho fondo hacia dentro y conformando en el mismo un ahuecamiento (5) de forma correspondiente a la forma de la cabeza del macho (3).WITH CONFORMED BACKGROUND AND BOTTLE SO OBTAINED, according to claim 1, characterized in that in the heating process (4) of the preform (1) inside the mold (2) the heating of said preform (1) occurs shape gradual over its entire length, the temperature reached being slightly lower in proximity to the area corresponding to the bottom of the bottle (6), in order to obtain a lower distention of the material and a greater thickness of the wall after blowing; and because the blow mold (2) comprises a male (3) or axially movable punch, preferably, inside the mold chamber (2) once the bottle (6) has been expanded, stretching said bottom inwards and forming in it a recess (5) corresponding to the shape of the male's head (3).
3.- PROCEDIMIENTO DE MOLDEADO DE UNA BOTELLA DE PLÁSTICO CON FONDO CONFORMADO Y BOTELLA ASÍ OBTENIDA, de conformidad con las reivindicaciones 1 y 2, caracterizado porque la botella (6) obtenida presenta en su parte inferior correspondiente a la base un ahuecamiento (5) o concavidad de forma cilindrica, cónica o con nervaduras entre otras posibles, siendo sus paredes de mayor espesor que las restantes paredes del contorno de la botella (6) en general. 3.- MOLDING PROCEDURE OF A PLASTIC BOTTLE WITH CONFORMED FUND AND BOTTLE SO OBTAINED, in accordance with claims 1 and 2, characterized in that the bottle (6) obtained has in its lower part corresponding to the base a recess (5) or cylindrical, conical or ribbed concavity among other possible, its walls being thicker than the remaining walls of the contour of the bottle (6) in general.
PCT/ES2002/000272 2001-06-06 2002-06-05 Method for molding a plastic bottle with a shaped bottom and resulting bottle WO2002098631A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP0101311 2001-06-06
ES200101311A ES2180437B1 (en) 2001-06-06 2001-06-06 MOLDING PROCEDURE OF A PLASTIC BOTTLE WITH CONFORMED FUND AND BOTTLE SO OBTAINED.

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Cited By (2)

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ES2339729A1 (en) * 2008-01-10 2010-05-24 Vinagrerias Riojanas S.A. Auto-flexible container and mold for the obtaining of the same (Machine-translation by Google Translate, not legally binding)
WO2012104499A2 (en) 2011-01-31 2012-08-09 Bou Mezrag Mohammed Modular receptacle formed by a plurality of axially-nestable containers, and method for producing such containers by means of the blow-moulding of a preform

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GB1528847A (en) * 1975-03-13 1978-10-18 Monsanto Co Process of blow moulding bottles
US5290506A (en) * 1991-04-30 1994-03-01 Nissei Asb Machine Co., Ltd. Process of injection stretch blow molding hollow article having thick-walled bottom
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ES2124084T3 (en) * 1995-02-09 1999-01-16 Sidel Sa PROCEDURE FOR THE MANUFACTURE OF CONTAINERS, SUCH AS BOTTLES, WITH A SELF-STABLE BACKGROUND.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2182645A1 (en) * 1972-05-02 1973-12-14 Piotrowski Tadeusz Thermoplastic bottles with concave base - produced by post forming of base for optimum peripheral strength
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US5290506A (en) * 1991-04-30 1994-03-01 Nissei Asb Machine Co., Ltd. Process of injection stretch blow molding hollow article having thick-walled bottom
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ES2124084T3 (en) * 1995-02-09 1999-01-16 Sidel Sa PROCEDURE FOR THE MANUFACTURE OF CONTAINERS, SUCH AS BOTTLES, WITH A SELF-STABLE BACKGROUND.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2339729A1 (en) * 2008-01-10 2010-05-24 Vinagrerias Riojanas S.A. Auto-flexible container and mold for the obtaining of the same (Machine-translation by Google Translate, not legally binding)
WO2012104499A2 (en) 2011-01-31 2012-08-09 Bou Mezrag Mohammed Modular receptacle formed by a plurality of axially-nestable containers, and method for producing such containers by means of the blow-moulding of a preform

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ES2180437B1 (en) 2004-04-16

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