JPH09165014A - Heat-cutting device for easily unsealable heat shrinkage packaging with heat shrinkable film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide an easily unsealable heat-shrinkage packing material, in which a commodity is packed by shrinking a film by heat, by attaching a heat cut welding blade, which forms cut seal part for forming an unsealing protrusion on an edge of film, to an edge of a heat cut welding device of the heat block type. SOLUTION: A film 2 in which a commodity 1 is placed between films is provided at a predetermined location between heat blocks 8, 8' and heat cut welding blades 9, 9' are pressed against heat cut welding blade receivers 7, 7' of lower structure of a welding device, respectively, whereupon openings 3, 4 of the film 2 are heat-cut and welded by the heated blades 9, 9'. At the same time, an incision forming blade 12 attached to the corner between the blocks 8, 8' is pressed against a part of the edge of the film 2 to form a heat-cut welding incision seal part 5. Thereafter, when the film 2 is heated and shrinked to tightly pack an item to be packed, the part 5 is not closely attached to the commodity 1 and formed into an unsealing protrusion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in so-called heat shrink packaging, is capable of forming an easy-open projecting piece on a part of a film package at the same time when the film is fused and welded. The present invention relates to a film fusing and fusing device.

[0002]

2. Description of the Related Art So-called heat-shrinkable packaging means, for example, a heat-shrinkable packaging film wound in a roll shape is pulled out in two folds, a product is put between the two folded films, and an opening portion of the film ( This is a technology for tight packaging by fusing and fusing the edges) to form a bag, and then heat-shrinking the film with a heat-shrinking device, which makes the product look beautiful and clear and enhances the product value. Recently, it has been actively used because of the advantage that the packaging process can be arranged on an automatic line to easily package products having complicated shapes.

However, the heat-shrinkable packaging allows the product to be tightly packed regardless of the shape of the product, but has the drawback that it is difficult to open the film because the film is packed in close contact with the product. . In order to overcome such a defect, perforation for opening is made at a predetermined portion of the film during the packaging process.

However, in the method of making perforations, if the film is strongly tensioned during the heat shrinking process, the perforation holes of the film may expand or the film may tear from the holes, so that the degree of heat shrinkage may be reduced. It has to be controlled and has the drawback of not being able to package too tightly.
Further, even if the package can be tightly packed, there is a problem that the bag is broken from the perforations when handling the package. However, no other decisive opening method has been established in the heat-shrinkable packaging technology using a bi-fold heat-shrinkable film.

[0005]

The present invention overcomes these deficiencies in heat-shrinkable packaging and allows for inexpensive and easy opening while still retaining the full benefits of heat-shrinkable packaging. A fusing and fusing film for easy-opening heat-shrinkable packaging that can be applied even when packaging is performed by an L-type sealer packaging machine that uses a half-fold heat-shrinkable film for which no convenient opening method has been found A device is provided.

A fusing and fusing apparatus for an easily-openable heat-shrinkable package according to the present invention is formed into a bag by fusing and fusing an opening (edge) of a film in which a product is put between two folded films. In the heat block device, characterized in that, simultaneously with the fusing and welding of the edge portion of the film, a notch forming blade for forming a notch seal portion that constitutes the easy-open projecting piece is attached to a part of the film package. It is a thing.

Hereinafter, with reference to the drawings, an easy-opening protruding piece forming fusing and welding apparatus for heat shrink packaging according to the present invention will be described.
The procedure for heat shrink packaging will be described.

FIG. 1 shows a typical fusion welding apparatus according to the present invention. As shown in FIG. 1-A, the upper constituent portion of the fusing and welding apparatus according to this embodiment is composed of heat blocks (8, 8 ′) combined in an L shape. A bar heater (10, 10 ') is arranged inside the heat block, and the bar heater heats the fusing blade (9, 9') attached to the lower part of the heat block. The lower component part of the fusing and welding apparatus is composed of fusing and fusing blade receivers (7, 7 ') combined in an L-shape according to the shape of the heat block. Further, in the heat block, a notch forming blade (12) has screw holes (11, 11 ') for attachment formed at predetermined locations of the heat block, screws (13, 13') and washers (14, 14). '). In the embodiment shown in FIG.
The cut forming blades (12) are attached to the corners of the heat blocks (8, 8 ') combined in an L shape. This notch forming blade (12) also has a rod heater (1
It is heated by 2).

The notch forming blade (12) is formed, for example, by obliquely attaching a blade portion having a sharp tip to an L-shaped mounting seat portion as shown in FIG. 1-B. You can

In the fusing and fusing apparatus having such a structure, the film (2) in a folded state in which the product (1) is inserted between the films is arranged at a predetermined position of the L-shaped heat block,
The upper part of the fusing and welding apparatus is lowered to press the fusing and fusing blades (9, 9 ') against the fusing and fusing blade receivers (7, 7') of the lower part of the fusing apparatus. The opening portions (3 and 4) of the film are fused and welded by the L-shaped fusing blades (9, 9 ') heated by the rod heater. At the same time, the heated notch forming blades (12) attached to the corners of the heat block are pressed against a part of the edge of the film, so that the fusion-welding notch seal part (5) is applied to the part of the film. It is formed. The fusing blade (9 ') on the heat block, which is perpendicular to the film feeding direction, also fusing and welding the opening (3') of the film in the packaging of the next cycle.

By this step, the product as shown in FIG. 2 is wrapped in a bag-like film, all the openings of the film are fusion-welded, and the fusion-bonding is partially welded to the edge of the film. A package having the cut seal portion (5) is formed.

Next, the film is heat-shrinked to tightly wrap the article to be packaged. FIG. 3 shows a state in which the heat shrinkage of the film is completed and the packaged object is tightly packaged. Also,
FIG. 4 shows the package of FIG. 3 as viewed from the left lateral direction. At the stage of this heat shrinkage, the notch seal portion (5) formed on the edge of the film remains without adhering to the package (commercial product), and the opening protruding piece (6) is formed. The size and shape of the formed protruding piece can be empirically determined by adjusting the shape and length of the notch formed in the edge portion of the film, the width of the notch seal portion, and the like.

The method of heat-shrinking the heat-shrinkable film is as follows:
It is well known in the art that the film can be heat-shrinked, for example, by passing the package through a hot air tunnel.

The package thus obtained has a beautiful appearance as compared with the conventional heat-shrinkable package, except that the opening projecting piece (6) is formed. . The heat-shrinkable package obtained in this manner can be opened very easily by pulling the protruding piece (6) along the direction of the fusion-welding seal portion (4).

As described above, by using the fusing and welding apparatus for easily opening heat shrinkable packaging according to the present invention, an easily opening heat shrinkable package can be obtained very easily.

The present invention can be applied to almost any conventional heat block type packaging device using a bi-fold heat shrinkable film. That is, the fusion welding blade mounting screw holes (11, 11 ') are formed at appropriate positions of these heat block type packaging devices, and the fusion welding blade (12) according to the present invention is attached to the mounting screws (14, 14). ') And washers (13, 13') are used for attachment to form the fusing and welding apparatus for easily-openable heat-shrinkable packaging according to the present invention. Therefore, by simply making a slight modification to the conventional heat block type packaging device, it is possible to obtain a fusing and welding device capable of performing easy-open heat shrink wrapping easily and at extremely low cost, and has a large industrial value. is there.

[Brief description of the drawings]

FIG. 1 is a diagram showing the concept of a fusing and welding apparatus for an easily-openable heat-shrinkable package according to an aspect of the present invention. FIG. 1-A shows the overall concept of a fusing and welding apparatus for easy-open heat shrinkable packaging, and FIG.
-B shows the shape of the fusing blade for forming a notch.

FIG. 2 is a view showing a state of a package formed by the fusing and welding apparatus for easily opening heat-shrinkable packaging of the present invention.

FIG. 3 is a diagram showing a state of a heat-shrinkable package formed by heat-shrinking the package shown in FIG.

FIG. 4 is a diagram showing a state in which the packaging body of FIG. 3 is viewed from the left lateral direction.

Claims (2)

[Claims] 1. A heat-shrinkable film folded in two is used to place a product between the films, and the opening (edge) of the film is fused and welded to form a bag, and then the film is formed. A heat-shrink wrapping device for heat-shrinking and wrapping a product, wherein the film heat-welding welder is of a heat block type, and an edge portion of the heat block heat-welding device is used. To
The opening (edge) of the film is fused and welded to form a bag shape, and at the same time, a notch forming welding blade for forming a notch seal portion that forms a projecting piece for opening is attached to the edge of the film. A film fusing and welding device characterized in that 2. A bag-shaped package containing a product is obtained by using the film fusing and welding apparatus according to claim 1, and then the package is heated to shrink the film to produce a product. How to wrap.