JP2003118708A - Filling machine and its packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in the prior art wherein a strip tape is elongated and broken around both edge portions in splicing since the tensile stiffness of the splice tape is too much decreased by heat to hold the slice portion and therefore it is necessary to stop the filling machine to reset the strip tape from the beginning. SOLUTION: A filling machine making a packaging material into cylindrical shape and continuously forming containers laps the edge portion of the present strip tape on the edge portion of the next strip tape and heat-seals them such that the heat pattern is substantially discontinuous at least in both edge portions of the strip tape in the splice portion whereby the splice of the strip tape can keep enough tensile stiffness without being influenced by heat.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a filling machine,
The present invention relates to a heat zone pattern in the price portion of a strip tape.

[0002]

2. Description of the Related Art Conventionally, for example, a packaging container for containing liquid food has a so-called brick shape, and the content liquid is discharged from a straw hole opened by piercing a straw with a straw hole sealing portion formed in the packaging container. Exhale and drink.

FIG. 1 is a schematic view of mounting a strip tape of a packaging container. FIG. 5: is a figure which shows the heat-sealing pattern at the time of the splice of the strip tape of the conventional packaging container. In the figure, reference numeral 15 denotes a packaging container body, and the packaging container body 15 is formed by molding the packaging material 11 into a predetermined shape.
The outer layer 20, which is sequentially formed from the outer side to the inner side of
It comprises a paper substrate 21, an inner layer 22 (optionally consisting of an adhesive layer, a barrier layer, an adhesive layer and an innermost layer).

The outer layer, the adhesive layer and the innermost layer are usually formed of a resin such as polyethylene (PE) or ethylene copolymer, but the outer layer and the innermost layer are formed of low density polyethylene (LDPE). Preferably. The barrier layer is formed of, for example, aluminum foil. It should be noted that the outer surface of the outer layer or the outer surface of the paper base material is subjected to predetermined printing as necessary.

The straw hole sealing part 17 has a structure in which the outer layer 20 and the inner layer 2 are formed in the straw hole 16 in which a paper base material is hollowed out in advance.
It is formed at a predetermined position of the packaging container main body 15 so as to cover 2. Then, a pull tab (not shown) is disposed so as to cover the straw hole 16, but the pull tab itself is the straw hole sealing portion 1.
It is fixed to 7. The pull tab may be made of a plastic resin, a thin paper laminated on the plastic resin, or optionally a barrier layer such as an aluminum foil.

In such a packaging container, the end of the packaging material facing the content liquid inside the container is covered with a strip tape so that the end of the packaging material does not come into direct contact with the content liquid. Then, if necessary in order to continuously supply the strip tape to the packaging material, the end portion of the new next strip tape is fixed by heat splicing to the end portion of the present strip tape which has been reduced, as shown in the figure. In the splice portion, the entire area where the splice tape overlaps is driven by a driving force (not shown) and the seat head base 71 and the flat seal head 74.
At the same time, the flat seal head 74 attached to the seat head base is heated and melted and fixed.

[0007]

However, in the above-mentioned conventional method, as shown in the figure, at the time of splicing, the heat zone of the heat-sealing portion of the strip tape is loaded with heat on the entire overlapping area of the splice joint portion. ing. Therefore, since the splice part is pulled while the temperature of the splice tape is temporarily higher than room temperature, the tensile strength of the splice tape which has been lowered by heat becomes insufficient to hold the splice part and both ends of the strip tape cannot be held. Sometimes the strip tape stretched from around the area and was cut. In this case, the filling machine must be stopped and the strip tape set must be restarted from the beginning, and it is necessary to sterilize the vicinity and restart the process, leading to a loss of time. There is also a loss.

An object of the present invention is to solve the problem that the conventional strip tape is cut immediately after splicing, and to provide a filling machine in which the efficiency is not lowered.

[0009]

To this end, according to claim 1 of the present invention, there is provided a filling machine for cylindrically forming a packaging material to continuously form a container, the paper base being exposed on the inner surface side of the container. In order to cover the end of the material with the strip tape continuously, the heat pattern of the splice part which is joined by heat sealing by overlapping the end part of the currently used strip tape and the end part of the next used strip tape is at least at the splice part. Provided is a filling machine for a liquid food container, which is provided with a sealing head having protrusions so as to be heat-sealed substantially discontinuously at both ends in the length direction of the strip tape.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a view showing a heat sealing pattern of the strip tape of the packaging container according to the embodiment of the present invention. FIG. 3 is a schematic diagram showing a method of manufacturing the packaging container according to the embodiment of the present invention. FIG. 4 is a plan view showing fold lines of the packaging container according to the embodiment of the present invention.

Conventionally, in a filling machine for producing a packaging container filled with liquid food such as milk and soft drink, the web-shaped packaging material is continuously tube-shaped while being conveyed,
A liquid food is filled in a tubular packaging material. In the figure, numeral 11 is a packaging material, and the packaging material 11 is set in a state of a reel 12 in a filling machine, is fed out by a feeding machine (not shown), and is conveyed in a web-like shape in the filling machine. The packaging material 11 is formed by vertically cutting a wide base paper (not shown) at a plurality of locations, and folds m1, m2, m11 to m14 are formed in advance. After that, the packaging material tube 41 is sent to a horizontal sealing device (not shown), and in the horizontal sealing device,
A lateral seal portion is formed by being sandwiched from both sides and sealed laterally at a predetermined interval. Subsequently, in the lateral seal portion, the packaging material tube 41 is cut by a cutting device (not shown), and the prototype container 14 having a pillow shape, a bag shape, or the like is separated. Then, the creases m1 and m in which the respective prototype containers 14 are formed in advance by a molding device (not shown)
2, molded into a predetermined shape along m11 to m14, and the packaging container 15 is completed.

In the figure, numeral 15 is a packaging container body,
A straw hole is formed at a predetermined position of the packaging container body 15. The packaging container body 15 is formed by molding a packaging material into a predetermined shape, and the packaging material is the packaging container 1
5, an outer layer, a paper base material, and an inner layer (consisting of a barrier layer, an adhesive layer, and an innermost layer) formed in order from the outer side to the inner side. The outer layer, the adhesive layer and the innermost layer are usually formed of a resin such as polyethylene or ethylene copolymer, but the outer layer and the innermost layer are preferably formed of low density polyethylene. The barrier layer is formed of, for example, aluminum foil. It should be noted that the outer surface of the outer layer or the outer surface of the paper base material is subjected to predetermined printing as necessary.

In such a packaging container, the end of the packaging material facing the content liquid inside the container is covered with a strip tape so that the end of the packaging material does not come into direct contact with the content liquid. Then, in order to continuously supply the strip tape to the packaging material, the end portion of the next used strip tape is fixed to the end portion of the currently used strip tape by heat splicing as needed, as shown in the figure. In the splice portion, the entire area where the splice tape overlaps is driven by a driving force (not shown) to the seat head base 71 and the flat seal head 7.
At the same time as the pressure is applied at 4, the projecting seal head 73 attached to the seat head base heat-melts and fixes it. Therefore, since the sill head has a projecting shape, it is formed by several heating wires parallel to the lateral direction of the splice tape, for example, as shown at 32 in the figure. That is, the heat pattern of the splice portion where the end portion of the currently used strip tape and the end portion of the next used strip tape are overlapped and joined by heat sealing is substantially at least at both end portions in the length direction of the strip tape in the splice portion. It is designed to be fixed after being continuously heat-sealed. Therefore, as shown in the figure, at the time of splicing, the heat zone of the heat seal part of the strip tape is not loaded with heat to the entire overlapped area of the splice joint, but the transverse direction of both ends of the strip tape length direction. It includes the area that is not affected by heat. In other words, since there is a region to which heat is applied in the lateral direction of the splice tape and a region to which heat is not applied, the splice portion in this region is pulled while the temperature of the splice tape remains partly normal temperature. Therefore, the tensile rigidity does not decrease due to heat and the splice portion can be sufficiently held, so that the strip tape does not extend and cut from the area.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention. For example, although the description shows the heat pattern of the splice as several patterns 32 that are parallel to the lateral direction of the splice tape, it is a heat pattern in which the lateral directions at both ends in the length direction of the splice portion are substantially discontinuous. The central portion where the splice portions are overlapped may be the pattern 33 in which the entire area is thermally loaded.

Further, in the embodiment, the case of a rectangular parallelepiped paper container called a so-called brick has been described as an example, but a paper container in the shape of a hexagonal prism, for example. The present invention is applicable to paper containers having various shapes such as a columnar paper container having a quadrangular top surface and a bottom surface and an octagonal body portion, and these are not excluded from the present invention.

[0017]

As described in detail above, the present invention is
It is an object of the present invention to provide a filling machine which solves the problem that the conventional strip tape is cut off immediately after splicing and does not reduce the efficiency. In this case, there is no time loss such that the filling machine must be stopped and the strip tape setting must be restarted from the beginning or the disinfection must be performed again. Furthermore, there is no loss of packaging material during manufacturing.

[Brief description of drawings]

FIG. 1 is a schematic view of attaching a strip tape of a packaging container.

FIG. 2 is a diagram showing a heat sealing pattern of the strip tape of the packaging container in the embodiment of the present invention.

FIG. 3 is a schematic diagram showing a method of manufacturing the packaging container according to the embodiment of the present invention.

FIG. 4 is a plan view showing a fold line of the packaging container according to the embodiment of the present invention.

FIG. 5 is a view showing a heat sealing pattern when a strip tape of a conventional packaging container is spliced.

[Explanation of symbols]

11 packaging materials 12 reel 13 Filling pipe 14 prototype container 15 Packaging container body 20 outer layer 21 Paper substrate 22 Inner layer S1 Horizontal seal part m11-14 Vertical folding line 30 strip tape 31, 32, 33 heat seal pattern 71 seal head base 72 seal counter base 73 Seal head with protrusion 74 Flat seal head

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Claims (2)

[Claims] 1. A filling machine for continuously forming a container by forming a packaging material into a tubular shape, which is currently used for continuously covering the end of the packaging material exposed on the inner surface of the container with a strip tape. The heat pattern of the splice part where the end part of the strip tape and the end part of the strip tape to be used next are overlapped and joined by heat sealing is such that at least both end parts in the length direction of the strip tape in the splice part are substantially discontinuously heated. Filling machine for liquid food containers with a sealing head having a protrusion to be sealed. 2. A packaging material formed by a filling machine for a liquid food container, which comprises the seal head having a protrusion according to claim 1.