JPH0342955B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a heat-shrinkable film that automatically cuts a label made of a heat-shrinkable film set in a bottle without manual intervention. The present invention relates to a device for cutting labels consisting of.

<Prior art> When reusing a used bottle, the label made of a heat-shrinkable film set on a bottle is cut off and removed, and the bottle surface is cleaned before the bottle is reused. The conventional method for cutting and removing such labels has been to use a knife or the like. However, in recent years, the surface of many bottles has been coated with synthetic resin to prevent them from bursting and scattering, and there are problems such as scratches on the surface when a knife is applied to a coated bottle. It had become necessary. In addition, troubles such as breakage of the cutter occurred for ordinary bottles that were not coated, and there were problems in cutting and removing the bottle using a cutter.

<Means for Solving the Problems> The present invention has been made in view of the current situation, and provides an apparatus for cutting labels made of heat-shrinkable film from used bottles with an extremely simple mechanism and without using a knife. Regarding this, its characteristics are A;
A conveyor that conveys bottles with labels made of heat-shrinkable film set therein; B; a screw that feeds the bottles to the star foil at regular intervals; C; a bottle mounting table provided on the outer circumferential surface, and a conveyor provided at equal intervals around the entire circumference; A vertically movable bottle top fixing device fixes the head of the bottle supplied from the star foil, and a narrow groove that blows hot air from the outside in the axial direction of the bottle corresponds to the bottle top fixing device. a turret that rotates in synchronization with the rotation of the star foil, and a turret that rotates in synchronization with the rotation of the star foil;
D; Star foil to send out the bottle, above A,
It is an object of the present invention to provide an apparatus for cutting a label made of a heat-shrinkable film having B, C, and D.

Examples of bottles used in the present invention include those coated with a synthetic resin or the like to prevent them from bursting and scattering, and those made of ordinary glass. An example of a label made of a heat-shrinkable film is a label made of a heat-shrinkable film made of plastic such as polyvinyl chloride or polypropylene.
Usually, it is provided in a band shape so as to surround the periphery of the bottle, as shown in FIG. 1, for example. The part of the label to be cut can be anywhere on the label, but if hot air is blown onto this part, that part will melt.
To blow hot air, for example, a nozzle 3 having a narrow groove is provided in the axial direction of the bottle (label) as shown in FIGS. Blow hot air from the outside of the bottle as shown in the drawing,
The heat-shrinkable film on the sprayed portion is cut by melting. In this case, it is more preferable that the nozzle is curved as necessary to match the shape of the bottle. In this case, the label tends to shrink due to the action of the hot air ejected from the nozzle 3 having a narrow groove, that is, the nozzle 3 having a slit-like outlet, and then due to the wind pressure, the label shrinks in the axial direction of the label in the example shown in FIGS. 2 and 4. It will be severed. At this time, it is also possible to simultaneously blow away the contracted label by the wind pressure and separate (remove) it from the bottle.

It is also possible to blow off the label by blowing air to the cut part at the same time as cutting. For example, as shown in Fig. 4, it is possible to install air blowing nozzles on both sides of the nozzle 3 and blow off the cut label by its action. This is also not limited.

Furthermore, it is also possible to remove the label by using the thermal shrinkage property of the label using a heat medium. For example, if heat is applied to the cut label, the label will shrink and the cut surface will gradually expand, resulting in the final It is also possible to make the label smaller and detach from the bottle. The current situation is shown in FIG. 3, and the label will now be automatically removed from the bin. At this time, heat may be applied by passing through a contraction tunnel, for example, but any other suitable method may be used.

Next, specific examples of the present invention will be described with reference to FIGS. 5 and 6, but it goes without saying that the present invention is not limited to such specific examples.

An example of such a concrete example is first of all, an empty bottle 1' in which labels are set, which are continuously conveyed by a conveyor 9.
are arranged at regular intervals by a screw 10, and fed by a star wheel 12 to a turret 11 which rotates in synchronization with the rotation of the star wheel 12. The empty bottles 1' sent to the bottle mounting table 14 provided on the surface along the outer circumference of the turret 11, that is, the outer peripheral surface, are placed at equal intervals around the entire circumference of the turret 11, and the tops of the bottles fed from the star foil are It is fixed by a vertically movable bottle top fixture 7 that fixes the bottle, and has a narrow groove for blowing hot air from the outside in the axial direction of the bottle, and is in a positional relationship corresponding to the bottle top fixture. The label 2 is sprayed with hot air from hot air blowing nozzles 3 installed around the entire circumference.
The chisel is cut, contracts, and is blown away by the pressure of hot air jetted from the nozzle 3. The cut labels 2 fall to the lower part of the enclosure 4 surrounding the upper part, outer periphery, and lower part of the turret 11, and are sucked up by a blower and collected by the collecting duct 5 arranged at the lower part. If the label 2 remains on the bottle, it may be completely removed using the rotating brush 6. The bottle 1 from which the label has been cut and removed is passed through a star foil 13 and conveyed to the next process by a conveyor 9. At this time, the nozzle 3 rotates together with the turret and hot air is ejected at the same time, and the method for removing the cut label may be any suitable method and is not particularly limited.

Next, examples of the present invention will be described below.

Example 1 Using the apparatus shown in Figures 5 and 6, the following conditions were used to cut used labels from a bottle set with heat-shrink labels made of polyvinyl chloride and printed on the entire back side. I made the settings.

Hot air outlet temperature: 230℃ Width of the nozzle consisting of slit grooves: 0.5mm Hot air speed: 82m/sec Distance between the hot air outlet and the bottle: 2.5mm (constant) When the cutting conditions were tested under the above conditions, it was found that the cutter was not set in the bottle. The heat-shrinkable label was cut instantly (0.5 seconds) and was blown away by the wind pressure and removed from the bottle. Note that it took about 1 second at a temperature of 210°C.

Example 2 A heat-shrinkable label made of styrene-butadiene block copolymer was tested under the same conditions as in Example 1 except for the hot air blowing temperature of 200°C. It was cut off and blown away by the wind pressure. When the temperature was set to 180°C, it took about 1 second.

<Effects of the Invention> The present invention is as described above, and it is possible to automatically cut a label made of a heat-shrinkable film set on a used bottle using an extremely simple device without any manual intervention. This has become possible, and it is extremely effective.

Furthermore, even when using a bottle whose surface is coated with a synthetic resin, which has been commonly used in the past, the present invention is excellent because it does not damage the coated surface.

[Brief explanation of drawings]

FIG. 1 is a front view of a bottle with a label made of heat-shrinkable film set, FIG. 2 is a front view showing hot air being blown from a hot air blowing nozzle having narrow grooves, and FIG. The figure is a front view showing the state in which the label has been heat-shrinked and removed from the bottle, FIG. The figure is a perspective view showing an example of a label cutting device, and FIG. 6 is a plan view thereof. 1... Bottle, 2... Label made of heat shrink film, 3... Hot air blowing nozzle, 4... Enclosure,
6...Rotating brush, 7...Bin top fixing device (can be moved up and down), 8...Air blowing nozzle, 1'...Bin where label is set, 9...Conveyor,
10...screw, 11...turret, 1
2, 13... Star foil, 14... Turret and bottle mounting stand.

Claims (1)

[Claims] 1 A: Conveyor carrying bottles with labels made of heat-shrinkable film set; B: Screw which feeds the bottles to the star foil at regular intervals;
C: A bottle mounting table provided on the outer circumferential surface, and a vertically movable bottle upper fixing device provided at equal intervals around the entire circumference and fixing the head of the bottle supplied from the star foil;
The star wheel rotates in synchronization with the rotation of the star foil, which comprises a hot air jetting nozzle having a narrow groove for blowing hot air from the outside in the axial direction of the bottle, and a hot air blowing nozzle in a positional relationship corresponding to the bottle upper fixing device. A device for cutting labels made of heat-shrinkable film, characterized in that it is equipped with a turret, D; a star foil, which feeds out the bottles, and A, B, C, and D above.