ES2701953T3 - Continuous manufacturing process of a plastic bag for food products - Google Patents
Continuous manufacturing process of a plastic bag for food products Download PDFInfo
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- ES2701953T3 ES2701953T3 ES16717424T ES16717424T ES2701953T3 ES 2701953 T3 ES2701953 T3 ES 2701953T3 ES 16717424 T ES16717424 T ES 16717424T ES 16717424 T ES16717424 T ES 16717424T ES 2701953 T3 ES2701953 T3 ES 2701953T3
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- bellows
- outer edge
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Classifications
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- 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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/001—Flexible containers made from webs by folding webs longitudinally
- B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/003—Flexible containers made from webs starting from tubular webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/30—Shape of flexible containers pointed or tapered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/148—Cutting-out portions from the sides of webs or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
- B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
- B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
- Bag Frames (AREA)
Abstract
Procedimiento de fabricación en continuo una bolsa de envase de productos alimenticios, a partir de una funda de una película de material plástico, según el cual: - se somete la película a operaciones de plegado sucesivos para realizar fuelles laterales (1c, 1d) entre dos paredes (1a, 1b), - se realiza una línea de soldadura longitudinal (L1) al nivel de la unión de los bordes exteriores de los fuelles (1c, 1d) con las paredes (1a, 1b), - se realiza a intervalos regulares una línea de soldadura transversal (L2) constituyendo un fondo (1e), - se realiza a intervalos regulares una línea de soldadura oblicua (L3) entre los bordes exteriores de los fuelles (1c, 1d) y la línea de soldadura transversal (L2) constituyendo el fondo (1e), - se recorta una zona triangular que resulta de las líneas de soldaduras oblicuas (L3) y del fondo (1e), - se realiza un corte al nivel del fondo (1e) que presentan simétricamente, por una parte y por la otra, las líneas oblicuas para formar una abertura de la bolsa, procedimiento de fabricación caracterizado por que el recorte de cada zona triangular se efectúa a partir del borde exterior de los fuelles (1c, 1d), a lo largo del borde exterior de la línea de soldadura oblicua (L3), hasta el borde exterior de la línea de soldadura transversal (L2), después del recorte se sigue transversalmente hacia el interior de la funda de película de plástico a lo largo del borde exterior de la línea de soldadura transversal (L2) hasta hacer un semicírculo alejándose de la línea de soldadura transversal (L2) para volver hacia atrás y seguir el recorte transversalmente hasta el borde exterior de la funda, paralelamente a la línea de soldadura transversal (L2).Continuous manufacturing process for a bag of food products, from a sheath of a film of plastic material, according to which: - the film is subjected to successive folding operations to make lateral bellows (1c, 1d) between two walls (1a, 1b), - a longitudinal weld line (L1) is made at the level of the union of the outer edges of the bellows (1c, 1d) with the walls (1a, 1b), - is performed at regular intervals a transverse welding line (L2) constituting a bottom (1e), - an oblique welding line (L3) is made at regular intervals between the outer edges of the bellows (1c, 1d) and the transverse welding line (L2) constituting the bottom (1e), - a triangular zone that results from the oblique weld lines (L3) and the bottom (1e) is cut, - a cut is made at the level of the bottom (1e) that present symmetrically, on the one hand and on the other, the oblique lines to form one to Berture of the bag, manufacturing process characterized in that the trimming of each triangular zone is made from the outer edge of the bellows (1c, 1d), along the outer edge of the oblique welding line (L3), up to The outer edge of the transverse weld line (L2), after trimming, is traversed transversely towards the inside of the plastic film sheath along the outer edge of the transverse weld line (L2) until a semicircle is moved away from the transverse weld line (L2) to go back and follow the cut transversely to the outer edge of the sheath, parallel to the transverse weld line (L2).
Description
DESCRIPCIÓNDESCRIPTION
Procedimiento de fabricación en continuo de una bolsa de material plástico para productos alimenticiosContinuous manufacturing process of a plastic bag for food products
La invención se refiere al sector técnico de las bolsas de envasado de material plástico especialmente para el envase de productos alimenticios.The invention relates to the technical sector of plastic packaging bags especially for the packaging of food products.
Más particularmente, la invención concierne a una bolsa previamente formada de material plástico flexible, especialmente obtenida a partir de una película de un grosor inferior a 200 |jm, aproximadamente.More particularly, the invention concerns a pre-formed bag of flexible plastic material, especially obtained from a film with a thickness of less than about 200 μm.
Este tipo de bolsa comprende una pared delantera y una pared trasera montadas al nivel de sus bandas laterales, en combinación con fuelles, que delimitan un fondo y una abertura de relleno.This type of bag comprises a front wall and a rear wall mounted at the level of their side bands, in combination with bellows, which delimit a bottom and a filler opening.
De manera conocida, estas bolsas previamente formadas están realizadas en continuo, a partir de una sola película de material plástico, tal como PE adicionado o no de OPP, o bien de PE adicionado de PET, o cualquier otro material perfectamente conocido por una persona experta en la materia que corrientemente se emplea en el ámbito del envase alimenticio.In a known manner, these pre-formed bags are made continuously, from a single film of plastic material, such as PE added or not with OPP, or PE added with PET, or any other material perfectly known by a skilled person. in the matter that is currently used in the field of food packaging.
La película de material plástico se somete en continuo a operaciones sucesivas de plegado y de soldadura, para realizar una bolsa como tal, como se ha indicado, con un fondo, dos paredes, unidas por fuelles y una abertura de rellenado opuesta al fondo.The film of plastic material is subjected continuously to successive folding and welding operations, to make a bag as such, as indicated, with a bottom, two walls, joined by bellows and a filling opening opposite the bottom.
Generalmente, los pliegues exteriores, al nivel de la unión de los fuelles y de las paredes, se unen por líneas de soldadura en continuo. El fondo de la bolsa se realiza por cualquier medio conocido y apropiado.Generally, the outer folds, at the level of the union of the bellows and the walls, are joined by continuous welding lines. The bottom of the bag is made by any known and appropriate means.
Bajo el efecto de rellenado de la bolsa, los fuelles laterales se separan, proporcionando así volumen a la forma de la bolsa e indirectamente participan en la formación de un fondo, a fin de permitir mantener la bolsa en posición vertical, o sensiblemente vertical.Under the effect of filling the bag, the side bellows separate, thus providing volume to the shape of the bag and indirectly participate in the formation of a bottom, in order to allow the bag to be held vertically, or substantially vertical.
Resulta que, sin embargo, la formación del fondo necesita a menudo operaciones de plegado y no constituye una base capaz de asegurar una perfecta estabilidad en posición vertical, o sensiblemente vertical de la bolsa.It turns out, however, that the formation of the bottom often needs folding operations and does not constitute a base capable of ensuring perfect stability in vertical, or substantially vertical position of the bag.
Este problema de estabilidad puede presentar problemas importantes en el momento del acondicionamiento de la bolsa, después del rellenado, sobre una máquina automática. En efecto, es importante que las bolsas puedan permanecer perfectamente estables, por ejemplo, en el momento de su transporte de puesto en puesto, a fin de someterlas, en buenas condiciones, a las operaciones seleccionadas y evitar cualquier fenómeno de vuelco de su contenido.This problem of stability can present important problems at the time of packaging of the bag, after filling, on an automatic machine. Indeed, it is important that the bags can remain perfectly stable, for example, at the time of transport from post to post, in order to subject them, in good condition, to the selected operations and to avoid any overturning of their contents.
Esta estabilidad es igualmente importante para el almacenaje y la presentación de las bolsas.This stability is equally important for the storage and presentation of the bags.
Para intentar remediar estos inconvenientes, una solución resulta, por ejemplo, de las enseñanzas de la patente FR 2 833 928, que prevé crear, sobre por lo menos una de las paredes de la bolsa una línea de marcado, capaz de constituir una zona de plegado determinada para formar y delimitar el fondo con relación a las paredes, creando una base de apoyo bajo el efecto de la separación de los fuelles.In order to try to remedy these drawbacks, a solution results, for example, from the teachings of the patent FR 2 833 928, which foresees creating, on at least one of the walls of the bag, a marking line, capable of constituting an area of folding determined to form and delimit the bottom in relation to the walls, creating a base of support under the effect of the separation of the bellows.
Esta solución es eficaz, pero esencialmente adaptada en el momento en el que el fondo resulta de una operación de plegado y de soldadura a la parte inferior de las paredes de la bolsa. Otros procedimientos de fabricación de bolsas de plástico son conocidos a partir de los documentos US 3119548 y FR 2672033.This solution is effective, but essentially adapted at the time when the bottom results from a folding and welding operation to the bottom of the walls of the bag. Other methods of manufacturing plastic bags are known from US 3119548 and FR 2672033.
La invención propone otra solución, para resolver el problema presentado de mejorar la estabilidad teniendo por objetivo disminuir los grosores y mejorar la estética de la bolsa.The invention proposes another solution to solve the presented problem of improving the stability with the aim of decreasing the thicknesses and improving the aesthetics of the bag.
Para resolver un problema de este tipo, se ha concebido y puesto a punto un procedimiento de fabricación en continuo de una bolsa de envasado para productos alimenticios, a partir de una funda de película de material plástico, procedimiento según el cual:In order to solve a problem of this type, a process for the continuous production of a packaging bag for foodstuffs has been conceived and developed from a film sheath of plastic material, according to which:
- se somete la película a operaciones de plegado sucesivas para realizar fuelles laterales entre dos paredes, - se realiza una línea de soldadura longitudinal al nivel de la unión de los bordes exteriores de los fuelles con las paredes,- the film is subjected to successive folding operations in order to make lateral bellows between two walls, - a longitudinal welding line is made at the level of the junction of the outer edges of the bellows with the walls,
- se realiza a intervalos regulares una línea de soldadura transversal constituyendo un fondo,- a transverse welding line constituting a background is made at regular intervals,
- se realiza a intervalos regulares una línea de soldadura oblicua entre los bordes exteriores de los fuelles y la línea de soldadura transversal constituyendo el fondo, - an oblique welding line is made at regular intervals between the outer edges of the bellows and the transverse welding line forming the bottom,
- se recorta una forma triangular resultante de las líneas de soldadura oblicuas y del fondo, - se realiza un corte al nivel del fondo presentando simétricamente, por una parte y por la otra, líneas oblicuas, para formar una abertura de la bolsa.- a triangular shape resulting from the oblique welding lines and from the bottom is cut out, - a cut is made at the level of the bottom, symmetrically presenting, on one side and on the other, oblique lines, to form an opening of the bag.
El procedimiento de fabricación según la invención está caracterizado por que el recorte de cada zona triangular se efectúa a partir del borde exterior de los fuelles, a lo largo del borde exterior de la línea de soldadura oblicua, hasta el borde exterior de la línea de soldadura transversal, después el recorte se sigue transversalmente hacia el interior de la funda de película de plástico a lo largo del borde exterior de la línea de soldadura transversal hasta hacer un semicírculo alejándose de la línea de soldadura transversal para volver hacia atrás y seguir el recorte transversalmente hasta el borde exterior de la funda, paralelamente a la línea de soldadura transversal.The manufacturing process according to the invention is characterized in that the trimming of each triangular zone is made from the outer edge of the bellows, along the outer edge of the oblique welding line, to the outer edge of the welding line cross section, then the cut is traversed transversely to the inside of the plastic film sheath along the outer edge of the transverse weld line until it forms a semicircle away from the transverse weld line to go back and follow the cut transversely to the outer edge of the sheath, parallel to the transverse welding line.
Así, la bolsa de envasado de material plástico de productos alimenticios obtenida comprende una pared delantera y una pared trasera montadas, por una parte, al nivel de sus bandas laterales, en combinación con fuelles que forman dos pliegues, y por otra parte, al nivel de una de sus bandas transversales con dichos fuelles, para formar un fondo. Los bordes laterales exteriores de los fuelles están unidos al fondo por líneas de corte oblicuas, de modo que después del rellenado de la bolsa que corresponde a la separación de los fuelles, dichas líneas oblicuas forman simétricamente, por una parte y por la otra del fondo, una holgura en triángulo, sin sobre grosor, mejorando así la estabilidad de dicha bolsa, en posición vertical de rellenado.Thus, the plastic food product packaging bag obtained comprises a front wall and a rear wall assembled, on the one hand, at the level of its side bands, in combination with bellows forming two folds, and on the other hand, at the level of one of its transverse bands with said bellows, to form a bottom. The outer side edges of the bellows are joined to the bottom by oblique cutting lines, so that after filling the bag corresponding to the separation of the bellows, these oblique lines form symmetrically, on the one hand and on the other side of the bottom , a triangle clearance, without over thickness, thus improving the stability of said bag, in the vertical filling position.
Resulta de estas características que las holguras en forma de triángulo están situadas por una parte y por la otra de la zona mediana del fondo evitando cualquier sobre grosor, siendo dado que el pliegue está limitado en longitud, y está situado, como se ha indicado, solamente al nivel de la parte mediana del fondo. Es además posible equipar el fondo con etiquetas o bien otros elementos.It results from these characteristics that the triangle-shaped clearances are located on the one hand and on the other side of the median zone of the bottom avoiding any over thickness, given that the fold is limited in length, and is located, as indicated, only at the level of the middle part of the fund. It is also possible to equip the background with labels or other elements.
Según otras características, las líneas de cortes oblicuos están formadas a partir de fondo y de la línea mediana de los dos pliegues de cada fuelle.According to other characteristics, the lines of oblique cuts are formed from the bottom and the median line of the two folds of each bellows.
Los bordes exteriores de los fuelles, al nivel de su unión con las paredes, incluido al nivel de las líneas de corte oblicuas, presentan una zona de soldadura.The outer edges of the bellows, at the level of their union with the walls, included at the level of the oblique cutting lines, present a welding zone.
La invención se expone más adelante en este documento en más detalle con la ayuda de las figuras los dibujos adjuntos, en las cuales:The invention is explained later in this document in more detail with the help of the figures the accompanying drawings, in which:
- la figura 1 es una vista en perspectiva de una bolsa obtenida gracias al procedimiento según la invención, - la figura 2 es una vista plana y de cara de la película,- Figure 1 is a perspective view of a bag obtained by the method according to the invention, - Figure 2 is a flat and side view of the film,
- la figura 3 es una vista de lado, que corresponde a la figura 2, en posición separado de los pliegues de uno de los fuelles,Figure 3 is a side view, corresponding to Figure 2, in a position separated from the folds of one of the bellows,
- la figura 4 es una vista de frente de la bolsa, en posición rellenada,- Figure 4 is a front view of the bag, in the filled position,
- la figura 5 es una vista de lado, que corresponde a la figura 4,- figure 5 is a side view, corresponding to figure 4,
- la figura 6 es una vista desde abajo, que corresponde a la figura 4,- Figure 6 is a bottom view, corresponding to Figure 4,
- la figura 7 es una vista en planta, de carácter esquemático, que muestra el procedimiento de fabricación en continuo de una bolsa, según las características de la invención,Figure 7 is a plan view, schematic in nature, showing the continuous manufacturing process of a bag, according to the characteristics of the invention,
- la figura 8 es una vista en detalle de la zona rodeada que aparece en la figura 7, ilustrando el recorte de una zona triangular y el recorte con la doble lámina.Figure 8 is a detailed view of the surrounding area that appears in Figure 7, illustrating the trimming of a triangular area and the trimming with the double sheet.
De una manera perfectamente conocida, la bolsa para productos alimenticios designada en su conjunto por (1) está fabricada de un material plástico flexible, especialmente de un grosor inferior a 200 pm. La bolsa se obtiene, de manera perfectamente conocida, a partir de una bobina de película desenrollada en continuo y sometida a diferentes operaciones, especialmente de plegado y de soldadura realizadas en automático.In a well-known manner, the bag for food products designated as a whole by (1) is made of a flexible plastic material, especially of a thickness less than 200 μm. The bag is obtained, in a well-known manner, from a reel of film unrolled in continuous and subjected to different operations, especially bending and welding performed in automatic.
Resulta que la bolsa obtenida presenta una pared delantera (1a) y una pared trasera (1b) montadas al nivel de sus bandas laterales en combinación con fuelles (1c) y (1d). La bolsa presenta, además, un fondo (1e) y una abertura de rellenado (1f).It turns out that the bag obtained has a front wall (1a) and a rear wall (1b) mounted at the level of its side bands in combination with bellows (1c) and (1d). The bag also has a bottom (1e) and a filling opening (1f).
Cada uno de los fuelles (1c) y (1d) forman dos pliegues (a) y (b). El fondo (1e) está soldado al nivel de la unión de una de las bandas transversales de las paredes, con los fuelles. Each of the bellows (1c) and (1d) form two folds (a) and (b). The bottom (1e) is welded to the level of the junction of one of the transverse bands of the walls, with the bellows.
Según la invención, los bordes laterales exteriores de los fuelles (1c) y (1d), al nivel de su unión con las paredes delantera y trasera de la bolsa, están unidos al fondo (1e) por líneas de corte oblicuas (1c1) (1c2) y (1d1) y (1d2) (figuras 2, 3 y 6).According to the invention, the outer side edges of the bellows (1c) and (1d), at the level of their connection with the front and rear walls of the bag, are joined to the bottom (1e) by oblique cutting lines (1c1) ( 1c2) and (1d1) and (1d2) (figures 2, 3 and 6).
Las líneas de corte oblicuas están formadas a partir del fondo (1e) y de la línea mediana (c) de los dos pliegues (a) y (b) de cada fuelle.The oblique cut lines are formed from the bottom (1e) and the median line (c) of the two folds (a) and (b) of each bellows.
Los bordes laterales exteriores de los fuelles (1c, 1d), al nivel de su unión con las paredes delantera (1a) y trasera (1b), comprendidos al nivel de las líneas de corte oblicuas, presentan una línea de soldadura (L).The outer side edges of the bellows (1c, 1d), at the level of their connection with the front (1a) and rear (1b) walls, included at the level of the oblique cutting lines, have a welding line (L).
Resulta de estas características, que después del rellenado de la bolsa, que corresponde a la separación de los fuelles (1c, 1d), las diferentes líneas oblicuas forman simétricamente, por una parte y por la otra del fondo (1e), una holgura en forma de triángulo (T), figura 6. Estas holguras en forma de triángulo están por lo tanto situadas simétricamente, por una parte y por la otra del fondo (1e) y no presentan sobre grosor alguno. El sobre grosor, constituido por el fondo (1e) está por lo tanto limitado entre las dos holguras en triángulo (T), dicho de otro modo, sobre una longitud reducida.It results from these characteristics that after filling the bag, which corresponds to the separation of the bellows (1c, 1d), the different oblique lines symmetrically form, on one side and on the other side of the bottom (1e), a clearance in triangle shape (T), figure 6. These triangle-shaped clearances are therefore located symmetrically, on the one hand and on the other side of the bottom (1e) and do not have any thickness. The envelope thickness, constituted by the bottom (1e) is therefore limited between the two clearances in triangle (T), in other words, over a reduced length.
Se remite a la figura 7 que muestra el procedimiento de fabricación en continuo de una bolsa de envase de productos alimenticios, según las características de la invención a partir de una funda de película de material plástico.Reference is made to FIG. 7, which shows the process for the continuous production of a food packaging bag, according to the characteristics of the invention, from a film sheath made of plastic material.
Se somete la película a operaciones de plegado sucesivas para realizar los fuelles laterales entre dos paredes. Se realiza una línea de soldadura longitudinal (L1), al nivel de la unión de los bordes exteriores de los fuelles con las paredes delantera y trasera.The film is subjected to successive folding operations to realize the lateral bellows between two walls. A longitudinal welding line (L1) is made, at the level of the union of the outer edges of the bellows with the front and rear walls.
Se realiza a intervalos regulares, una línea de soldadura transversal (L2) que constituye el fondo (1e), y una línea de soldadura oblicua (L3) entre las paredes exteriores de cada uno de los fuelles y la línea de soldadura (L2), que constituye el fondo [etapa (A)].It is carried out at regular intervals, a transverse welding line (L2) that forms the bottom (1e), and an oblique welding line (L3) between the outer walls of each of the bellows and the welding line (L2), which constitutes the fund [stage (A)].
Las líneas de soldadura oblicuas (L3) y las líneas de soldadura transversales (L2) están realizadas unas después de las otras según etapas distintas y con herramientas distintas. El orden en el cual son realizadas estas líneas no es importante. Las líneas de soldadura oblicuas (L3) pueden estar realizadas antes o después que las líneas de soldadura transversales (L2). El hecho de que las líneas de soldadura oblicuas (L3) estén realizadas independientemente de las líneas de soldadura transversales (L2) y con herramientas distintas, permite poder adaptar o ajustar, si es necesario, la posición de las líneas de soldadura oblicuas (L3) con relación a las líneas de soldadura transversales (L2). Así, el procedimiento es más flexible en el sentido de que es posible variar la inclinación de las soldaduras oblicuas o desplazarlas transversalmente y por tanto modificar la bolsa fabricada, sin tener que cambiar de herramienta. Estas características permiten igualmente poder ajustar la posición de las líneas oblicuas (L3) en función de las separaciones dimensionales constatadas en el procedimiento de fabricación. El procedimiento de fabricación es simple, rápido y preciso.The oblique welding lines (L3) and the transverse welding lines (L2) are made one after the other according to different stages and with different tools. The order in which these lines are made is not important. The oblique welding lines (L3) can be made before or after the transverse welding lines (L2). The fact that the oblique welding lines (L3) are made independently of the transverse welding lines (L2) and with different tools, makes it possible to adapt or adjust, if necessary, the position of the oblique welding lines (L3) with relation to the transversal welding lines (L2). Thus, the process is more flexible in the sense that it is possible to vary the inclination of the oblique welds or to displace them transversely and therefore modify the manufactured bag, without having to change tools. These characteristics also make it possible to adjust the position of the oblique lines (L3) according to the dimensional separations observed in the manufacturing process. The manufacturing process is simple, fast and precise.
Se recorta, a continuación, la zona triangular (T) resultante de las líneas de soldadura (L1) (L2) y (L3), [etapa (B)]. Se debe observar que el recorte puede estar conformado de manera que se realicen bordes redondeados o no. Además, según la invención y en referencia a la figura 8, el recorte se efectúa a partir del borde exterior de los fuelles (1c, 1d), a lo largo del borde exterior de la línea de soldadura oblicua (L3), hasta el borde exterior de la línea de soldadura transversal (L2), después el recorte se sigue transversalmente hacia el interior de la funda de película plástica a lo largo del borde exterior de la línea de soldadura transversal (L2) hasta hacer un semicírculo alejándose de la línea de soldadura transversal (L2) para volver hacia atrás y seguir el recorte transversalmente hasta el borde exterior de la funda, paralelamente a la línea de soldadura transversal (L2).The triangular area (T) resulting from the welding lines (L1) (L2) and (L3), [step (B)] is then cut out. It should be noted that the cutout may be shaped so as to make rounded edges or not. Furthermore, according to the invention and with reference to FIG. 8, the trimming is carried out from the outer edge of the bellows (1c, 1d), along the outer edge of the oblique welding line (L3), to the edge outside of the transverse weld line (L2), then the cut is traversed transversely to the inside of the plastic film sheath along the outer edge of the transverse weld line (L2) until it forms a semicircle away from the line of transverse weld (L2) to go back and follow the cut transversely to the outer edge of the sheath, parallel to the transverse weld line (L2).
Se realiza a continuación, de manera conocida, un corte al nivel de la línea de soldadura (L2), presentando simétricamente por una parte y por la otra las líneas de soldadura oblicuas (L3) para formar la abertura de la bolsa [etapa (C)].Then, in a known manner, a cut is made at the level of the welding line (L2), symmetrically presenting on one side and on the other side the oblique welding lines (L3) to form the opening of the bag [step (C)). )].
De preferencia, este recorte se efectúa por una doble lámina, ya que la separación de las láminas permite realizar un recorte rodeando por una parte y por la otra los recortes transversales realizados en el momento del recorte de las zonas triangulares (véase la figura 8). En otros términos, las líneas de soldadura transversales realizadas en el momento del recorte de las zonas triangulares se vuelven a encontrar dispuestas entre las dos láminas en el momento del doble recorte.Preferably, this trimming is carried out by a double sheet, since the separation of the sheets allows a trimming to be carried out, on the one hand, and on the other hand, the transverse cuts made at the time of the trimming of the triangular zones (see figure 8). . In other words, the transverse welding lines made at the time of the trimming of the triangular areas are again arranged between the two sheets at the time of double trimming.
De esta manera, el recorte con la doble lámina, alrededor de los recortes transversales realizados en el momento del recorte de las zonas triangulares, permite tener un acabado óptimo de la bolsa, con bordes redondeados y sin parte saliente. In this way, the cut with the double sheet, around the transverse cuts made at the time of trimming the triangular areas, allows to have an optimal finish of the bag, with rounded edges and no protruding part.
Las ventajas se ponen de manifiesto bien a partir de la descripción. En particular, se subraya y se recuerda: - la estética obtenida,The advantages are well demonstrated from the description. In particular, it is emphasized and remembered: - the aesthetics obtained,
- una disminución de los grosores,- a decrease in thicknesses,
- la estabilidad obtenida,- the stability obtained,
- la posibilidad de poner etiquetas o marcas al nivel del fondo. - the possibility of putting labels or marks at the bottom level.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1552713A FR3034406B1 (en) | 2015-03-31 | 2015-03-31 | PROCESS FOR THE CONTINUOUS PRODUCTION OF A BAG OF PLASTIC MATERIAL |
| PCT/FR2016/050669 WO2016156712A1 (en) | 2015-03-31 | 2016-03-24 | Method for continuously manufacturing a plastic bag for food products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2701953T3 true ES2701953T3 (en) | 2019-02-26 |
Family
ID=53483979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES16717424T Active ES2701953T3 (en) | 2015-03-31 | 2016-03-24 | Continuous manufacturing process of a plastic bag for food products |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3277596B1 (en) |
| DK (1) | DK3277596T3 (en) |
| ES (1) | ES2701953T3 (en) |
| FR (1) | FR3034406B1 (en) |
| PL (1) | PL3277596T3 (en) |
| PT (1) | PT3277596T (en) |
| TR (1) | TR201819432T4 (en) |
| WO (1) | WO2016156712A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857164B (en) * | 2018-08-22 | 2021-07-06 | 东莞市新力邦机械有限公司 | Manufacturing equipment for square bags |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3119548A (en) * | 1961-06-08 | 1964-01-28 | Dale Products Plastics Ltd | Plastic bags |
| DE1786047A1 (en) * | 1968-08-10 | 1971-11-11 | Neemann Mechanische Papierware | Foil pouch made of a composite film |
| US4789350A (en) * | 1986-04-19 | 1988-12-06 | Honsel Karl Heinz | Method and apparatus for manufacturing mailing envelopes or bags |
| FR2672033A1 (en) * | 1991-01-25 | 1992-07-31 | Bottari Pierre | Polygonal bag with planar transverse wall and device for its implementation |
| JP3845163B2 (en) * | 1997-01-28 | 2006-11-15 | 株式会社フジシールインターナショナル | Equipment for producing containers with spouts |
| JPH1143155A (en) * | 1997-07-23 | 1999-02-16 | Hosokawa Yoko Co Ltd | Liquid container |
| JPH11222244A (en) * | 1998-02-02 | 1999-08-17 | Hosokawa Yoko:Kk | Pharmaceutical and medical gusset bag |
| DE60030937T2 (en) * | 1999-12-02 | 2007-06-14 | Totani Corp. | Machine for the production of plastic bags |
| FR2833928B1 (en) | 2001-12-26 | 2004-02-13 | Autobar Flexible France | PACKAGING BAG WITH PREFORMED FONF |
-
2015
- 2015-03-31 FR FR1552713A patent/FR3034406B1/en active Active
-
2016
- 2016-03-24 ES ES16717424T patent/ES2701953T3/en active Active
- 2016-03-24 DK DK16717424.2T patent/DK3277596T3/en active
- 2016-03-24 EP EP16717424.2A patent/EP3277596B1/en active Active
- 2016-03-24 WO PCT/FR2016/050669 patent/WO2016156712A1/en active Application Filing
- 2016-03-24 PT PT16717424T patent/PT3277596T/en unknown
- 2016-03-24 TR TR2018/19432T patent/TR201819432T4/en unknown
- 2016-03-24 PL PL16717424T patent/PL3277596T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR3034406B1 (en) | 2017-12-08 |
| FR3034406A1 (en) | 2016-10-07 |
| EP3277596B1 (en) | 2018-11-21 |
| PT3277596T (en) | 2018-11-30 |
| TR201819432T4 (en) | 2019-01-21 |
| DK3277596T3 (en) | 2019-01-02 |
| WO2016156712A1 (en) | 2016-10-06 |
| EP3277596A1 (en) | 2018-02-07 |
| PL3277596T3 (en) | 2019-04-30 |
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