JPH0329731A - Bonding method for cylindrical shaped label - Google Patents

Abstract

PURPOSE:To prevent the positional discrepancy of a cylindrical shaped label from generating by a method wherein after a cylindrical shaped label is temporarily bonded to a designated position of a container, a main bonding process is performed. CONSTITUTION:A fitting process is performed while a cylindrical shaped label 2 is fitted over a collar part 10, which is provided at the mouth of a container 1, and the container 1, on which the label 2 is fitted, is carried to a preforming process by a carrying conveyor 3. At the preforming process, when an initial heating, for which hot air is blown to the cylindrical shaped label 2, is performed, the cylindrical shaped label 2 is thermally shrunk, and folding lines 20, 20 are eliminated, and the shape is formed into an approximately round shape. When this condition generates around the collar part 10, an idly fitting condition of the cylindrical shaped label 2 to the container 1 is presented. When further heating is started from a front lower spot S in the advancing direction of the cylindrical shaped label, heat shrinkage advances while the label is fastened to the collar part 10. Accompanying with the advancing of the label 2, the label 2 is always heat-shrunk from the lower spot S for respective parts in the vertical direction, and therefore, the label 2 thermally shrinks while being pulled downward, and is temporarily bonded on the collar part 10. The container 1, which has passed the preforming process, enters in a heat-shrinking tunnel 6, which is composed of a heating oven, and a bonding process of the cylindrical shaped label 2 is performed. By this method, a cylindrical shaped label can be quickly and precisely bonded at a designated position on a container with a simple constitution of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a cylindrical label made of a heat-shrinkable film to a container. When heat-shrinking and attaching a cylindrical label to the mouth of a large Western liquor bottle, it is difficult to position the cylindrical label relative to the mouth because there is no receiving part, and large distortions tend to occur after heat-shrinking. The present invention relates to a cylindrical label attachment method suitable for attaching a cylindrical label to a part.

If the container (bottle) used to contain ``Saibeizasatsu'' has a cork stopper at its mouth, it is necessary to seal the space between these parts.

One conventional example of such a sealing method is a method of tying the mouth of the container and the cork stopper with a colored string. However, this method has problems in that the sealing work is troublesome and the material cost for the string increases, leading to an increase in cost.

Therefore, recently, pvc (polyvinyl chloride), P
A method in which a cylindrical label made of a heat-shrinkable film such as P (polypropylene), PET (polyethylene terephthalate), or PS (polystyrene) is heat-shrinked and attached to a container to seal the container tends to be frequently used.

As an example of such a method, a cylindrical label that is folded in half in the cylindrical direction is opened in a substantially circular shape (see Fig. 2 (b)), and attached to the corresponding part of the container (for example, the flange of the container) (just A conceivable method is to attach the cylindrical label to the container by passing the container through a heat shrink tunnel made of a heating furnace via a conveyor belt, heat shrinking the cylindrical label there, and attaching the label to the container.

Another possible method is to heat the container at the location where it is attached without using a heat shrink tunnel, without moving the container with the cylindrical label attached, and then heat shrink the label to attach it. However, in the case of the former method, the attached cylindrical label does not have sufficient holding power while the container is being transported by the transport belt, so the position of the label may shift relative to the container. In addition, the entire label is enveloped in heat in the heating furnace, and strong thermal energy is applied first from the direction of travel, as shown in Fig. Since the dimensions of the upper part L are larger than the lower part S based on the reference line H of the part, and the space between the label and the container is large, the amount of heat shrinkage of the upper part L is large and the lower part S is upwardly moved. The drawback is that the label 2 is pulled and detached from the flange, as shown in Figure 5 (opening), impairing the accuracy of the attachment position of the label 2 to the container 1 and shrinking due to heat, causing distortion in the label 2 and deteriorating the appearance of the product. There is.

In addition, in the case of the latter method, it is difficult to perform heat shrinkage at the same location, and the equipment configuration becomes complicated.
The disadvantage is that it is difficult to implement.

The present invention has been made in order to eliminate the drawbacks of the prior art, and uses a simple device configuration to quickly and accurately attach a cylindrical label to the corresponding part of the container, and to attach the cylindrical label to the corresponding part of the container in the lateral (horizontal) direction after heat shrinkage. ), and also to eliminate variations in position in the height direction.

The present invention is a method for attaching a cylindrical label made of a heat-shrinkable film to a container, which includes opening the cylindrical label that has been folded in half into a cylindrical shape and attaching it to the corresponding part of the container. 1st
In the process, the cylindrical label is initially heated, the creases are resolved and it is shaped into a circular shape, and the positioning device is used to position the cylindrical label with respect to the corresponding area, and then the cylindrical label is slightly shrunk. The second step is to temporarily secure the container to the container.
The method is characterized in that it includes the following steps: and a third step of reheating the temporarily attached cylindrical label and heat-shrinking it to adhere it to the container. The first step is a step of attaching the cylindrical label to the container, which may be done mechanically or manually as long as the label is opened and attached to the relevant part of the container using a conventionally known method. Although it can be done manually, it is necessary to provide a position regulating guide to regulate the vertical position of the cylindrical label when putting it on, and to attach it to the relevant part without touching the position regulating tool in the next process. In an open cylindrical label, the stiffness of the crease part is greater than other parts in both the vertical and horizontal directions, and the strength in the horizontal direction (circumferential direction) generates tension in the opened label, which causes the container to tighten. It is held in place. The second step is a pre-forming step in which the cylindrical label is temporarily fixed to the corresponding part of the container.The initial heating applied to the cylindrical label is applied to a flat shape in which the hot air outlet is made of a slit with a gap of 4wm. Preliminary shaping nozzles are provided at two locations facing each other at right angles to the direction of travel of the container. If the part to which the cylindrical label is temporarily fixed is located at the bottom of the label, the nozzle should be angled (for example, 45@) with the tip facing downward in the vertical plane in the direction of travel. In other words, the part of the cylindrical label that is temporarily attached (the part where the shape of the container changes significantly, such as the brim) is first heated to begin heat shrinkage. Like the nozzle for pre-61 forming, the position regulating device is made up of two plates facing each other at right angles to the direction of travel of the container in the pre-61 forming process and spaced apart at a predetermined distance. Adjust the height to

The third step is a heat shrinking step in which the cylindrical label is reheated and heat-shrinked. The heat shrinkage may be carried out in a conventionally known heating furnace or the like, and is carried out under conditions depending on the material of the cylindrical label.

Lines --- Once a month In certain cases, the cylindrical label attached to the relevant part of the container in the first process will be temporarily fixed in the correct position of the relevant part through the second process. , in the subsequent third step, it will be deposited with high accuracy within ±lu+ without any positional deviation.

The initial heating applied to the cylindrical label during the pre-forming process is performed to heat and shrink the area around the area where tension is generated due to the strength of the fold of the label attached to the container faster than other areas. By performing initial heating, the creases in the heated area are resolved by the tension in the same direction due to heat contraction, which is greater than the tension due to the stiffness of the crease, and the area becomes more circular, albeit for a short time. Appears to be loosely fitted to the container.

Furthermore, this is done in order to always heat-shrink the part of the label that is attached to the flange of the container, that is, the lower part of the label, first in each part in the vertical direction, as shown in Figure 6 (a). When heating starts from the front lower part of the cylindrical label in the traveling direction, the lower part S of the label first shrinks due to heat, as shown in FIG. Heat shrinkage progresses as the label moves forward.Next, as the label advances, heat shrinks constantly from the bottom in each part of the label in the vertical direction, and the label moves downward while each part is retained in the flange. Due to the synergistic effect with the loosely fitted state described above, the label is pulled downward and heat-shrinked, and is temporarily fixed to the flange (see Fig. 6 (c)). This is used to position the cylindrical label relative to the container, and during the process of heat shrinkage due to initial heating, the cylindrical label becomes more circular and loosely fits into the container, and is pulled down by heat shrinkage from the lower part. The lower end of the label is received and the position of the label relative to the container is controlled.

Temporarily attaching a cylindrical label to a container by partially heat-shrinking it is a method of temporarily fixing the label to a container by partially heat-shrinking it. It can be quickly heated and shrunk and pre-shaped.

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a process diagram showing the steps of the method of the present invention, FIG. 2 is a drawing showing details of the mounting process, and FIG. FIG. 4 is a front sectional view of the main parts showing the product obtained through the final process.

As shown in FIG. 1, the method of the present invention consists of three steps: a mounting step (a), a preforming step (b), and a heat shrinkage step (c). Product Z is obtained through the heat shrinkage step (c). It is now possible to Each process will be explained in order below.

The mounting step (a) is carried out by fitting the cylindrical label 2 onto the flange 10 provided at the mouth of the container 1 (for example, a Western liquor bottle as shown), as shown in FIG. 2(c). ．． in particular,
It is folded in half into a cylindrical shape with the top and bottom open ends and closed together.
The open end of the cylindrical label 2 supplied cut to a predetermined size is opened as shown in FIG. 2(a), and the cork stopper 11 is inserted through it, as shown in FIG. 2(b). This is done by fitting it onto the flange 10 of the container l from above.

In this fitted state, the stiffness of the folds 20, 20 of the cylindrical label 2 is greater than that of other parts, so the folds 20, 20
The opposing surface 21 of the cylindrical label 2 is in an open state as shown in the figure.
, 21 in the direction of the arrows A and A, and is attached to the collar 10 in an unstable posture. Position regulating guides 4l, 4 regulating the fitting position of the cylindrical label 2
1 is set slightly above (1 to 5 m) the attachment position of the relevant part, that is, the position set by the position regulating tool 4 (
(See Figure 2 (C)). The container l covered with the same label 2 is conveyed by a conveyor belt 3 to a preforming process (mouth) on the downstream side.

In addition, a glass cork stopper l1 having a larger head than this is inserted into the flange 10 of the container 1,
Since the cylindrical label 2 is attached through the cork stopper 11, the inner dimension of the cylindrical label 2 is made to have a sufficient margin with respect to the outer diameter dimension of the flange 10. The cork stopper 11 is inserted and installed by inserting it into the container opening of the integrated cork stopper 11-t-flange 10 in which the glass umbrella 12, cork 13, large washer 14, and small washer I5 are set, as shown in FIG. It will be done as follows.

The material of the cylindrical label 2 is the above-mentioned heat-shrinkable film (for example, polyvinyl chloride), and the mounting process may be performed automatically using an existing mounting device, or may be performed manually. You can. Further, after the cylindrical label 2 is fitted, the container l may be placed on the conveyor belt 3, or the attachment process may be performed on the conveyor belt 3. In the preliminary forming process (opening), as shown in FIG.
In order to heat the cylindrical label 2 from the front lower part, two flat pre-forming nozzles 5, 5 each having a slit 50 having a gap of 4 with the tip downward in the vertical plane in the direction of travel
Install at a 5" angle.

Similarly, the position regulating device 4 provided in the preliminary forming step (B) is composed of two plate members 40, 40 facing perpendicularly to the traveling direction of the container 1 and facing each other with a predetermined interval. Adjust to the height of the relevant part.

The position regulating device 4 and the nozzles 5, 5 are fixedly arranged in the conveyance area of the container 1 being conveyed on the conveyor belt 3.

The height positions of the plate materials 40, 40 are set slightly lower than that of the flange 10, so that the lower end of the heat-shrinkable cylindrical label 2 is sufficiently fitted to the lower side of the flange 10. be. Furthermore, the nozzles 5, 5 are provided at two locations facing each other in a direction perpendicular to the direction of travel of the container 1, and are provided at a predetermined interval.
+) is provided so that the hot air is mainly blown onto the portion of the cylindrical label 2 fitted into the flange 10 through the slit 50.

In addition, in the illustrated example, nozzles 5, 5 having slits 50
is inclined by 45" with respect to the position regulating device 4, but this inclination angle is not limited to 45", and the speed of the conveyor belt 3, Set appropriately in relation to hot air speed, hot air temperature, etc. The slit 50 may be a flat slit, a slit with small holes arranged in a slit shape, or a slit with lattice-shaped holes arranged in a slit shape, etc., to eject hot air in a slit shape.

Next, thermal deformation (thermal contraction) of the cylindrical label 2 when hot air is blown from the nozzles 5, 5 will be explained. As shown in FIG. 6, when the cylindrical label 2 is initially heated by blowing hot air as described above, the cylindrical label 2 undergoes heat shrinkage (preliminary shape), but as shown in FIG. ), at the start of heat shrinkage, the opposing surfaces 21, 2 of the cylindrical label 2
A circumferential tension shown by arrows A and A is generated in l, which dissolves the folds 20 and 20 of the cylindrical label 2 and causes the label 2 to
The shape will be approximately circular. If this condition occurs around the flange 10 to which the cylindrical label 2 is attached, the inner dimension of the cylindrical label 2 will be larger than the outer diameter of the flange 10, and the cylindrical label 2 will be attached to the container 1. On the other hand, a loose fit state appears.

Furthermore, the initial heating is performed in order to always heat-shrink the part of the label 2 that is engaged with the flange 10 of the container 1, that is, the lower part S of the label, first in each part in the vertical direction. 6
As shown in Figure (A), when heating starts from the front lower part S of the cylindrical label in the traveling direction, the lower part S of the label 2 shrinks first as shown in Figure (B), so the flange Heat shrinkage progresses while being retained on the flange 10 without coming off from the flange 10.

Next, as the label 2 advances, each part of the label 2 in the vertical direction is always heated and shrunk from the lower part S, and each part is
The label 2 is pulled downward while being locked to the flange 10, and due to the synergistic effect with the loosely fitted state described above, the label 2 is pulled downward and heat-shrinks, causing the flange 1 to shrink.
0 (see Figure 6 (c)).

In this preliminary forming step (b), the conveyor belt 3 is continuously driven, and the conveyance speed, hot air temperature (for example, 250°C), and hot air speed (for example, 30 m/min) are controlled.
The preforming step (b) is performed by appropriately selecting the min) and the like.

The container 1 that has undergone the preforming process (exit) enters the heat shrink tunnel 6 consisting of a heating furnace, that is, the heat shrink process (c), where it is heated to a predetermined temperature (the optimal temperature according to the material of the cylindrical label 2). The cylindrical label 2, which is reheated and temporarily attached, is heat-shrinked to carry out the process of attaching it to the container 1. An inlet 60 and an outlet 61 are provided at the upper and lower downstream walls of the heat shrink tunnel 6, through which containers 1 are carried in and discharged. In this way, when performing the adhesion process after the temporary fixing process, the cylindrical label 2 is attached to the container 1 when entering the heat shrinking process (c).
Since no positional deviation occurs with respect to the container 1, the cylindrical label 2 can be accurately attached to a desired position on the container 1, regardless of the shape of the corresponding part.

In addition, although the above-mentioned example explained the case where the method of the present invention is applied to Western liquor bottles, it goes without saying that the type of container is not limited to this. Further, the attachment position is not limited to the position in the above embodiment, and the method of simply attaching the label to the container can be similarly applied. In the case of the present invention as described above, the cylindrical label is temporarily attached to the corresponding part of the container and then the attachment process is started.
There is no possibility that the cylindrical label will be misaligned with respect to the container when entering the adhesion process. Therefore, distortion of the cylindrical label and variation in the overlapped position in the height direction are almost eliminated, and the quality of the product, that is, the appearance thereof, can be significantly improved. In addition, since the installation work can be performed accurately without requiring any skill, there is an advantage that there is no need for rework and that the work can be done quickly and reliably with a simple structure.

[Brief explanation of drawings]

Fig. 1 is a process diagram showing the steps of the method of the present invention, Fig. 2 is a drawing showing details of the mounting process, Fig. 3 is a drawing showing details of the preliminary forming process carried out subsequent to the mounting process, and Fig. 4 5 is a front cross-sectional view of the main parts showing the product obtained through the final process.
The figure is an explanatory diagram showing the state of a cylindrical label when it is heat-shrinked in a conventional heating furnace, and FIG. 6 is an explanatory diagram showing the state of initial heating. ■...Container 10...Brim 11...Cork stopper 2
... Tubular label 3 ... Conveyor belt 4 ... Position regulating device 5, 5 ... Nozzle 6 ... Heat shrink tunnel Z ... Product. @Figure 4

Claims (1)

[Claims] (1) A method for attaching a cylindrical label made of a heat-shrinkable film to a container, which includes a first step of opening the cylindrical label folded in half into a cylindrical shape and attaching it to a corresponding part of the container; Initial heating is applied to the cylindrical label to eliminate the creases and form it into a circular shape, and the positioning device is used to position the cylindrical label in relation to the corresponding area.Then, the cylindrical label is slightly shrunk and temporarily attached to the container. A method for attaching a cylindrical label, the method comprising: a second step of reheating the temporarily attached cylindrical label, and a third step of heat-shrinking the cylindrical label and adhering it to a container.