JPS58193243A - Device for blowing out heat-shrinkable label by hot air - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of a new method for automatically and accurately melting down heat-shrinkable labels attached to bottles as quickly as possible.

Generally, labels made of heat-shrinkable films attached to various types of bottles are peeled off once when used bottles are washed and reused, and the bottle surface is cleaned before being reused. However, such labels are conventionally peeled off using a knife or the like. However, in recent years, it has become common practice to coat the surfaces of bottles with synthetic resin materials to prevent them from bursting and scattering, and if a knife is applied to such coated bottles, the coating may be damaged. However, there are problems such as the risk of damage, and some kind of alternative countermeasure is required. In addition, even for ordinary bottles that are not coated, the trouble of being scratched by a knife is unavoidable, and mechanical methods such as using a knife to remove the bottle cannot be said to be sufficient.

In this regard, the present inventors have endeavored to research new peeling means to replace this, and have developed a method for easily peeling and removing heat-shrinkable labels from used bottles.
It was previously filed as No. 137403. The present invention is characterized in that the label made of a heat-shrinkable film set in a bottle is cut by blowing hot air onto the section to be cut and the label is peeled off. When implementing this method, various conditions are required in terms of consistency, stability, and reliability of results in repeated implementation.
There is a need to further compare and consider these and make appropriate selections to implement under the most favorable conditions.

The present invention is based on the above-mentioned viewpoints, and describes the necessary conditions and factors regarding how to efficiently remove the heat-shrinkable labels attached to the surfaces of used bottles by fusing them. It is a process that comprehensively considers and discards, enables implementation on an industrial scale, and consistently obtains results to be titrated both qualitatively and quantitatively. When blowing hot air onto heat-shrinkable labels attached to bottles to fuse them, the slit width of the hot air jetting nozzle was set to 0.1 to 2H, and the hot air temperature at the time of jetting was 150°C.
In addition to the above, [2. The hot air speed is set to 3Q%ec or more,
The purpose is to blow the hot air under conditions where the distance between the hot air nozzle and the bottle is 16 nm or less, so that the label can be fused as quickly as possible.

The present invention will now be described in detail with reference to illustrative embodiments. What is shown in FIGS. When blowing hot air onto heat-shrinkable labels to fuse them, expedient information regarding holding and transporting the bottles, nozzles for blowing hot air, hot air jetting equipment, etc.
This is an example, and the method of the present invention will be explained with reference to these figures. An empty bottle (1) with a heat-shrinkable label attached to the body surface as shown in the first figure is conveyed. The bins are loaded on the conveyor (2) and conveyed one by one, and fed to the supply star wheel (4) side with a constant bin interval by the Inford screw (3) installed in parallel with the conveyor (2). Through the rotation of the wheel (4), the empty bottle (1
) is the table surface (13) of the rotary table (7).
), and here the label (2+) surface receives hot air from the hot air jet nozzle (5) shaped like a vertically long thin slit. It is fixed by the chucking head (6), and the bottom of the empty bottle fl) is also fixed by the positioning stand 04) provided on the table surface (I3), making its posture and position more stable and immovable. is retained. Next, the hot air jetting nozzle (6) moves forward and approaches the bower (11), and hot air is jetted from the slit to hit the label, thereby cutting the label. In the above-mentioned process, the pitch at which the bottle is sent out by the Inford screw (31) and the rotational delivery pitch of the feed star wheel (4) are the same, and the rotary table (71#-1' M-air jet nozzle (5), chucking head (6), and positioning stand 041 rotate together, so in the illustrated example, hot air jet nozzle (6), positioning stand 04)
The rotary table (7) with
The label is rotatably provided around the center of the label as a fulcrum. By using such mechanical means, empty bottles fi
Place the table surface (03) of the table (7) at a certain distance below the soil, and lock it with the chucking spatula (+6172) lowering and positioning stand (04), facing the hot air outlet nozzle (5) and placing it on the ground. Hot air is blown onto the surface of the attached label (product) to fuse it.

A narrow bottle of Label Co., Ltd. that has been fused as described above +1
As the rotary table (7) rotates, the labels 1 move sequentially as shown in FIG. A discharge star wheel (9) is provided adjacent to the table (7) at a position where the table (7) substantially rotates.
), the label is removed and the large empty bottle 1101 Fi
They are transported to the next process on a conveyor (2). At this time, the empty bottle fil is placed on the discharge star wheel (9
), the chucking head (6) rises to release the bottle, and the hot air jet nozzle (5) also moves back, leaving a distance from the bottle.

As is clear from the above process description, the rotary table (
Empty bottle +11 and chucking head (6) in 7)
and the hot air jet nozzle (5) move synchronously as one set, but in this case, it is preferable that the distance between the empty bottle (1) and the floor 1 nozzle (5) be constant at the time of fusing. Therefore, when cutting a label sheet 0) attached to a curved bottle shape, it is desirable to use a nozzle (5) having a slit curved along the bottle shape. In the above process, the reason why the hot air jetting nozzle (6) advances and retreats toward the bottle surface is because the 10 empty blood bottles transferred from the supply star wheel (4) to the table surface 0:(1) shake slightly. If the hot air jetting nozzle (5) is fixed and immovable, there is a risk of colliding with the empty bottle f!1 and damaging it, so it is preferable that the nozzle (6) is moved backward in the above state. It is from.

In the above process, the mechanical auxiliary means and the main parts in steps 1 to 1 in carrying out the method of the present invention are the relationship between the chucking head (6), the empty bottle (1), and the hot air jetting nozzle (5). It is a movement, and if we take this together with Figure 4, we get
The position indicated by line A-A in Fig. 2 indicates the position where the supply star wheel (4) is transferred onto the table surface 03) of the rotary table (7), and as shown in Fig. 4 (a), this position Once in position, the chucking head (6) descends to hold the top of the empty bottle (1), and the bottom of the empty bottle fil fits into the positioning stand 04) on the table surface 03), and the hot air jetting nozzle (6) is the 0th-order advancing position, which is the state immediately before advancing toward the empty bottle (1). The position on the line B-B in Fig. 2 is the position where the nozzle (6) approaches the empty bottle (1), and the label Figure 4 (b) shows the state before and after fusing.
As shown in , the nozzle (5) approaches the heat-shrinkable label of the empty bottle fi+ and starts blowing hot air to melt it. The next advancing position, the line C-C in Figure 2', is the position where the empty bottle (1) moves and passes through the collection duct (8). The figure shows the state immediately before the fused and peeled label (@) is sucked into the collection duct (8). Subsequently, at the next advancing position, the position shown on the line D-D in FIG. 2, the table (7) makes one revolution and the empty bottle (1) with no label (20) is moved to the discharge star wheel (9). As shown in FIG.
6) It is in a state where it retreats and leaves the 4 empty bins (1), and as described above, through the rotation of the rotary h9 table (7). Thus, one cycle of automatic melting of the heat-shrinkable label (2rl) in the method of the present invention is completed.

As shown in FIGS. 1 to 4 above, in carrying out the method of the present invention, the minimum required mechanical equipment for holding and transporting bottles and for blowing hot air during the process is as follows. Although this is just one example, it goes without saying that the contents of the mechanical equipment can be freely designed, and the characteristics of the method of the present invention reside in the following points. As mentioned above, in order to blow hot air from the slit of the hot air jet nozzle flsl onto the heat-shrinkable label (incorporated) to melt it, it is impossible to simply blow hot water and hot air. Despite the expected results, implementation on an industrial scale is impossible. The inventors of the present invention have repeatedly conducted various experiments and researched this point, and found that in order to achieve a steady fusing effect with high reliability and stability, the hot air jet from the hot air jet nozzle (6) is The opening is shaped like a slit, and the specifications of the slit width, hot air temperature, hot air speed (output speed), and the interval (distance) between the positive hot air blowing nozzle (5) and the bottles have important relationships. As a result of repeated research on these combinations and conditions, we have come to the conclusion that the following specific conditions must be implemented. That is, the slit width in the hot air jet nozzle (5) is set to 0.
1 to 2111; preferably 0.2 to 1 MM;
The temperature of the hot air at the time of ejection is 150℃ or higher; preferably 160℃
~250℃, and the hot air speed at the time of ejection is 30s and 80s or more;
Preferably, the distance between the hot air jet nozzle (5) and the bottle is 1,531,311 inches; preferably 1 to 8 mm, for example, a heat-shrinkable material with full back printing is applied. Label is at least 2
．． It was confirmed that the bottles were completely fused within 5 seconds, and on average within 1.5 seconds. Even if any one of the above conditions is missing, it will take longer to fuse the bottles, or there will be variations that make it impossible to fuse them.In order to obtain reliable and constant uniform results, It is essential to implement a combination of the above conditions.

Here, the bottles targeted by the present invention include glass bottle containers, ceramic bottle containers, metal bottle containers, etc.
There are no particular restrictions, and the heat-shrinkable label refers to a heat-shrinkable label made of, for example, a thermoplastic film with printing on the back and/or front side, and the film raw material is, for example, polyvinyl chloride. , polyethylene, polypropylene, etc., there are no particular restrictions. Even if the printing is on the front side or the back side, there is a transparent unprinted part and this part is difficult to melt. For example, a composition containing fine particles such as silica with an average particle size of about 0.1 to 10 μm is applied to the entire surface of the label or at least to the unprinted part so that it is easily fused and cut in the same way as the uneven parts caused by printing. It is only necessary to subject the surface to a surface treatment in advance, and these can be carried out as appropriate if necessary.Next, some specific examples of the method of the present invention will be shown.

Example 1 In an empty bottle covered with a heat-shrinkable label printed on the entire back side of polyvinyl chloride film ■ and styrene-butadiene block copolymer film raw material, the used label was melted and cut. Therefore, using the equipment shown in Figures 1 to 3, the hot air jetting nozzle (5) had a slit of 0.51'll and a hot air speed (at the time of jetting) of 82'').
iiiea, the distance between the surface of the bottle Tl) and the nozzle (+2)
．． 5N, and variously changed the hot air temperature (during blowout) conditions.
When the fusing time of the label ■■ was measured, the results shown in Table 1 shown in FIG. 5 were obtained. In the same table, the horizontal axis shows the fusing time (seO), and the vertical axis shows the hot air temperature (C'), but as the graph curve shows, if the hot air temperature is too low for both This is undesirable from the viewpoint of operating automated online equipment on an industrial scale.

Example 2 In order to melt-cut an empty bottle on which a heat-shrinkable label made of polyvinyl chloride film and printed on the entire back side was attached, the apparatus shown in Figs. 1 to 3 was used. , the inside of the slit of the hot air jet nozzle (5) is 0.5B, the distance between the bottle surface and the nozzle +51 is 2.5N, and the hot air speed at the time of jetting is: ■96")"txeo, ■Yo Yi 82%eO1 ■The fusing time was measured by changing the hot air temperature to 50 sieO as in Example 1, and the results were as shown in Table 2 shown in Figure 6. The horizontal axis in Table 0 is The fusing time (8.0) is shown, and the vertical axis is the hot air temperature (C0
), but in this graph curve, a fusing time of 2.5 seconds or more is not preferable from the viewpoint of processing speed and operating rate of machine installation, as in Example 1.

<Example 3> In order to cut the label of an empty bottle covered with the same heat-shrinkable dowel as in Example 2, the slit of the hot air jet nozzle (5) was cut using the apparatus shown in Figs. 0.811 inside
1. The distance between the bottle surface and the hot air jet nozzle (5) is 2.5
ff, the hot air velocity at the time of nozzle jetting was set to ■102 kaea, ■fuQ")/1rea, and ■68'%eo, and the hot air temperature was varied in the same manner as in Example 1, and the fusing time was measured. The results are as shown in Table 3 shown in Figure 187.The horizontal axis in the table shows the melting time, and the vertical axis shows the hot air temperature. The same conclusion as in Example 1.2 is obtained.

The present invention is as described above, and when cutting a heat-shrinkable label by blowing hot air, as shown in Table 1.2.3 in Example 1.2.3, a hot air jetting nozzle (5 ), by setting the hot air temperature, hot air speed, and distance between the hot air jet nozzle and the bottles to specific numerical relationships during the slit, the hot air can be heated without worrying about the type of heat-shrinkable film or the material of the bottles. The quick and accurate cutting results are
2. It can be obtained constantly with high reliability and stability, and in particular, the required time can be as quick as possible, that is, almost instantaneous or slow. By melting within δ seconds,
Using the mechanical equipment shown in Figures 1 to 5, it is possible to easily automate the work, making it possible to realize fusing technology on an actual industrial scale rather than on a laboratory scale. This is an excellent product as it significantly contributes to the recycling of used empty bottles with heat-shrinkable labels attached.

[Brief explanation of drawings]

1δ Fig. 1 is a perspective view of an example of a label fusing device that implements the method of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the same, and Fig. 4 is an explanatory diagram of the label fusing process. Figures 5, 6, and 7 are all graph curves showing the relationship between the melting time and the hot air temperature in the embodiments of the method of the present invention. (1)...Empty bottle, -...Heat-shrinkable label, (6)
...Hot air jet nozzle. Patent Applicant: Gunze Co., Ltd. Chaos V Smell Machine Kirinko Rutomasu〈Home 挣挾慾大 Proceedings Amendment (Method) 1 Case Representation 56 Special iFF Yu No. 213177. 2, Showa 2, Name of the invention: Apparatus for fusing heat-shrinkable labels with heat JIIK 3; Relationship with the person making the amendment case Patent issuer 033) Gunse Co., Ltd. 4; Agent Tatami 577; Drawings Figures 5, 6, and 7) 7 Contents of amendments Page 7, Contents of amendments 11) Details number! Delete everything that says "Table 1" on the 7th line of the second row. (2) In the 8th line of the same IF, correct the word "Doujin" to read "Same figure". (3) In the third line of the same @13g, ``I got the results as shown in the second barley shown. (4) Delete everything that says "shown in the third column" on line 17 of the same W. (5) On the 8th line of the same animal, it says "in the first table" t "in the same figure" and +LE. (6) During the small drawings, use the Tsukuda IE according to the attached sheet for figures 5, 6, and 7. Japanese Unexamined Patent Publication No. 58-193243 (9)

Claims (1)

[Claims] 1. When blowing hot air onto the heat-shrinkable labels attached to bottles to fuse them, set the slit width of the hot air jet nozzle to 0.1 to 2N, set the hot air temperature at the time of jetting to 150°C or higher, and set the hot air speed to The heat-shrinkable label is characterized in that the label is melted as quickly as possible by blowing hot air under conditions where the temperature is 305 eO or more and the distance between the hot air nozzle and the bottle is 15 ff or less. A method of melting with hot air.