JPH0958627A - Fitting of cylindrical heat-shrinkable film onto container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently fit a film on the outer periphery of a container by a method wherein a cylindrical heat-shrinkable film is placed on a float and is fed to a specified position, and at the same time, the container which is held by a container clamp is pushed up, and the film is moved to the bottom part of the container or lower, and is fitted on the outer periphery of the container. SOLUTION: A cylindrical heat-shrinkable film 2 which is opened by a separate process, is placed between a float 1 and a film feeding belt 3, and the film 2 is transferred to a specified position by the belt 3. In the meantime, a container 4 which is held by a container clamp 5, is pushed up by a plunger for the vertical moving of the container, and is inserted in a container holding part 7 of the similar shape with the top of the container 4 on the bottom part of the float 1. Then, the clamp 5 is instantly released from the container 4, and the film 2 is moved to a container fixing table 8 by the belt 3, and is fitted on the outer periphery of the container 4. Then, the container 4 is held by the clamp 5, and is pulled down to the original position by the plunger 6 to complete the fitting of the film 2 on the container 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrinkable label, a cylindrical heat-shrinkable film having an arc-shaped seal portion, and a heat-shrinkable thin film for use in outer packaging of a container such as a sleeve, which is more stable and faster. The present invention relates to a method of mounting a tubular heat-shrinkable film, which is suitable for achieving the above-mentioned properties, on a container.

[0002]

2. Description of the Related Art Conventionally, it has been widely practiced to attach a heat-shrinkable film to a container. This is to prevent the container from being soiled by dust or to use a printed heat-shrinkable film as a label. This is for ensuring that the container has not been opened by mounting a film, or for fixing the lid of the container to prevent the contents from leaking. Conventionally, the attachment of this heat-shrinkable film to a container is generally performed by closing one end of a tubular heat-shrinkable film by fusion bonding, covering the container from the other end that is open, and heat-shrinking this. According to the method of mounting on the outer periphery of the container. As a method, usually, a tubular film is attached to a container by a manual method, a mechanical method of attaching a film opened by vacuum, and a float.
There was a method of inserting directly at a certain distance from the etc., but it was unstable with a vacuum opening, and it was difficult to open it in a shape similar to the container. In addition, even when using a float or the like, a certain distance between the upper surface of the container and the float is required and the attachment stability is not good, and the waist of the film is important and the thickness is also required.

Further, in the conventional method of mounting the tubular heat-shrinkable film on the container, the container is inserted from one opening end of the tubular heat-shrinkable film so that the position of the tubular heat-shrinkable film and the container are not displaced. As described above, since the container was laid down and conveyed from the bottom side of the container to the overall heating device, the appearance of the tubular heat-shrinkable film under the laid container after the entire heat shrinkage was poor.
Moreover, since the container is conveyed in a lying state, automation after the whole heating device is difficult. In packaging for mounting on the outer circumference of a container with a tubular heat-shrinkable film, if the size of the tubular heat-shrinkable film that is fitted on the container is larger than the outer circumference of the container, the heat shrinkage rate is required for mounting on the container. Has to be increased, and when printing is performed on the tubular heat-shrinkable film, there is a drawback that a large distortion occurs in the printing and the commercial value is remarkably reduced. Therefore, it is necessary to make the dimension of the tubular heat-shrinkable film as close as possible to the outer circumferential dimension of the container so that the heat shrinkage rate of the heat-shrinkable film is as small as possible. Therefore, a tubular heat-shrinkable film having a small difference from the outermost peripheral dimension of the container can be fitted onto the container efficiently, and can be easily attached to the container. A method for attaching the tubular heat-shrinkable film to the container Was required to be developed.

[0004]

DISCLOSURE OF THE INVENTION The present invention overcomes the above-mentioned problems of the prior art and allows a cylindrical heat-shrinkable film to be efficiently attached to the outer periphery of a container. It is an object of the present invention to provide a method for attaching the above to a container.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a tubular heat-shrinkable film having an opening is attached to a float, the float is transferred to a predetermined position, and the container held by a container clamp is pushed up to make a container at the bottom of the float. After the container clamp is released from the container at the same time as or after being inserted into the container holding part having a shape similar to the shape of the upper part of the above, the film feed belt comes into contact with the float and the tubular heat-shrinkable film is placed below the bottom part of the container. The method for mounting a tubular heat-shrinkable film on a container is characterized in that the tubular heat-shrinkable film is moved to the outer periphery of the container and mounted on the outer periphery of the container, and then the tubular heat-shrinkable film is held together with the container and pulled down from the float.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION There are no particular restrictions on the material and shape of the container in which the heat-shrinkable film can be mounted by the method of the present invention, and the material can be glass, metal, wood, ceramic, plastic, etc. Can be used, and the shape can be cylindrical, elliptic,
A prismatic or tubular container can be used. The content of the container is also not particularly limited, and a container filled with a liquid, viscous liquid, paste, powder, granules, granules or the like can be used. The heat-shrinkable film used in the method of the present invention is not particularly limited, and for example, a film obtained by extruding the film with a T-die and then simultaneously or sequentially biaxially stretching it, or a film stretched by an inflation processing device, etc. Can be used. There is no particular limitation on the material of the heat-shrinkable film, for example, polyethylene,
In addition to polypropylene, polystyrene, vinyl chloride resin, polyethylene terephthalate, polybutylene terephthalate, polyamide, etc., a multilayer film in which different resins are laminated can also be used. The heat-shrinkable film used in the method of the present invention is preferably an unbalancing film having a heat shrinkage in the lateral direction larger than that in the longitudinal direction, and particularly a heat shrinkage in the lateral direction of 20 to 60.
%, And the heat shrinkage in the longitudinal direction of 0 to 30% is preferable.
The thickness of the heat-shrinkable film used in the method of the present invention is not particularly limited, and a film having a thickness of about 10 to 200 μm can be usually used.

Hereinafter, the present invention will be described with reference to the drawings. FIG.
5 is a sectional view showing an example of the method of the present invention. A tubular heat-shrinkable film 2 previously opened in a separate step is attached between the float 1 and the film feed belt 3, and the tubular heat-shrinkable film is fixed by the constantly rotating film feed belt 3. The container 4 held by the container clamp 5 that has been transferred to the position (FIG. 1) and sent by the container lateral feed transfer chuck (not shown) is pushed up by the container up-and-down moving plunger 6, and the bottom of the float 1 The container holding part 7 having a shape similar to the shape of the upper part of the container is inserted (FIG. 2), the container clamp 5 is momentarily released from the container 4 (FIG. 3), and the tubular heat-shrinkable film is fed by the film feed belt 3. 2 is moved to the container fixing base 8 of the container up-and-down moving plunger 6, and the tubular heat-shrinkable film 2 is attached to the outer periphery of the container 4 (FIG. 4). Position is determined by the container fixing table 8, jumping of the tubular heat-shrinkable film is prevented because it is held by the film feed belt 3. Next, the container 4 having the tubular heat-shrinkable film 2 mounted thereon is held by the container clamp 5 and pulled down to the initial position by the container up-and-down moving plunger 6 to complete the mounting of the tubular heat-shrinkable film on the container. (Fig. 5).

In FIG. 2, since the float 1 and the container 4 are integrated, the tubular heat-shrinkable film can be easily mounted even if the inner diameter of the film is close to the outer diameter of the container. Therefore, since the clearance between the outer circumference of the container and the inner circumference of the tubular heat-shrinkable film before heat shrinking can be small, when the tubular heat-shrinkable film is contracted by heat and brought into close contact with the outside of the container, the tubular heat The print distortion of the shrinkable film is reduced, the appearance after heat shrinkage is beautiful and the commercial value is increased, and the amount of film used is correspondingly reduced, leading to cost reduction.
Further, since the tubular heat-shrinkable film is forcibly fed by the film feeding belt, there is no free state, so that an ultrathin film can be used. The thickness of a conventionally used film is generally 30 to 60 μm in the case of a machine,
With the present invention, up to 13 μm is possible. Of course, even if it is thick, there is no problem in the case of this mechanism. Furthermore, in the past, manual work
Even with the vacuum opening method of the machine, there is a problem of opening the tubular heat-shrinkable film, and even when a float or the like is used, there is always a certain distance from the container, so PVC, PET, which has some elasticity to the film, Although limited to PS, according to the present invention, the film used is flat P
It can be used in P and PE, which also leads to cost reduction. In this way, in order to speed up the mounting of the tubular heat-shrinkable film on the container and to stabilize the mounting, etc., lift the container up to the container holding part at the bottom of the float while clamping the container upright from the transport surface. , With the container and float integrated, unclamp the clamp momentarily,
A mechanism is provided in which the tubular heat-shrinkable film is loaded into the container from the float at high speed, and then the container is clamped together with the tubular heat-shrinkable film and lowered to the conveying surface.

Although not shown in the figure after the tubular heat-shrinkable film is attached to the container, the upper portion of the tubular heat-shrinkable film is fused and cut into an arc shape in the next step to form the lower portion of the tubular heat-shrinkable film. To stick out from the container, shrink the part by heating to make it stick to the bottom of the container, and finally heat the entire tubular heat-shrinkable film to make it stick to the entire container, and printing etc. A container in which the tubular film is in close contact can be obtained. To carry out these methods continuously, to open the tubular heat-shrinkable film by passing the continuous closed tubular heat-shrinkable film outside the float for film opening held by a film feed roller or the like, The tubular heat-shrinkable film is sent to the outside of the container mounting float held by the film feed belt by a film feed roller, etc., and the tubular heat-shrinkable film is cut by the film cutter provided between both floats, and the container is loaded. It can be carried out by transferring the tubular heat-shrinkable film opened by the container float by a film feed belt and mounting it on the outer periphery of the container transferred immediately below the container mounting float by one pitch motion.

[0010]

EFFECTS OF THE INVENTION By the method of mounting the tubular heat-shrinkable film of the present invention on the container, the tubular heat-shrinkable film is not jumped and the mounting is stable, the amount of the film used becomes small, and the film thickness can be reduced. The material of the film can be diversified, and the positional dimension of the tubular heat-shrinkable film with respect to the container is stable.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first step of a method of mounting a tubular heat-shrinkable film on a container.

FIG. 2 is a cross-sectional view showing a second step of the method of mounting the tubular heat-shrinkable film on the container.

FIG. 3 is a sectional view showing a third step of the method of mounting the tubular heat-shrinkable film on the container.

FIG. 4 is a cross-sectional view showing a fourth step of the method of mounting the tubular heat-shrinkable film on the container.

FIG. 5 is a sectional view showing a fifth step of the method of mounting the tubular heat-shrinkable film on the container.

[Explanation of symbols]

 1 Float 2 Cylindrical heat-shrinkable film 3 Film feed belt 4 Container 5 Container clamp 6 Container up-and-down moving plunger 7 Container holder 8 Container fixing stand

Claims (1)

[Claims] 1. An open tubular heat-shrinkable film is attached to a float, transferred to a predetermined position, and the container held by a container clamp is pushed up to have a shape similar to the shape of the upper part of the container at the bottom of the float. At the same time as the container clamp is released from the container after or at the same time as the container holding part is inserted, the film feed belt comes into contact with the float and moves the tubular heat-shrinkable film to the bottom of the container or below to the outer periphery of the container. After mounting, the tubular heat-shrinkable film is held together with the container by a container clamp, and is pulled down from the float.