JPH10236446A - Laminate method on can body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate method on a can body in which a flexible film that can not keep standing for itself can be cut by a required length with high precision and the cut film is fed to the can body and obtain a laminate with a good quality. SOLUTION: A roll of flexible film 2 which can not keep standing for itself is attached to a feed roll 3 and a cutting roll 5 with vacuum suction and wound up thereon. The peripheral speed of the feed roll is made slower than the peripheral speed of the cutting roll 5 and a tension is given to the film 2 to divide the vacuum suction part of the cutting roll 5 into a plurality of portions. And the vacuum intensity is adjusted to give slide to the film 2 and certain distances are made for the cut films 2 to get a timing for the laminate on the can bodies. The laminate part of the laminate roll 8 is pressed by rolling to eliminate hollows on the film and obtain a favorate laminate on the can body without remaining air between the can body and the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laminating a film made of synthetic resin or the like on a can or the like for accommodating a beverage or the like, and more particularly to a method for laminating a can or the like which cannot be held independently. The present invention relates to a method for efficiently laminating a synthetic resin film on a can body without involving air.

[0002]

2. Description of the Related Art A conventional method of laminating a can is carried out by adhering a film on which information on the contents of a product contained in the can is printed to the outer peripheral surface of the can. Since this printed film is usually in a wound state, when it is laminated on a can, the information for one can is sequentially cut into a printed length and supplied to each can. This printed film usually has a thickness of about 30 μm.
The film can be supplied to the cutting section while maintaining the film shape. At the time of cutting, as shown in FIG. 5, a rotary cutter system a in which one side has a fixed blade b can sufficiently achieve the purpose.

In this rotary cutter system a, a fixed blade b is placed on one side, and a wear-resistant material c is provided at a predetermined position of the fixed blade b.
And has a rotary blade d that comes into contact with the wear-resistant material c. Then, the film e, which has been wound up from a film feed roll (not shown), is moved by an arrow X in FIG.
The resin film e can be pushed on the fixed blade b by pushing it in from the direction, and the resin film e can be pushed off by the rotary blade d at the same timing so that the length becomes one can.

[0004]

The cutting method of the film e in the method of laminating a can to the above-mentioned can is because the thickness of the printed film is about 30 μm and the film itself has self-sustainability, that is, it has a waist. It is possible. However, when the printed film e has a small thickness and is not self-supporting due to its lack of rigidity, the rotary cutter system a in which one side has the fixed blade d cannot be pushed in and sent out and cannot cope with it. On the other hand, a recent tendency is to make the thickness of the film e as thin as possible. This is required from the viewpoint of reducing the usage of the film e, that is, the so-called resource saving, and the viewpoint of reducing the burden when the used can is reused.

Accordingly, an object of the present invention is to provide a laminate having a good appearance by cutting a flexible film which cannot be held on its own to a desired length and supplying the cut film to a can without entraining air. It is an object of the present invention to provide a method of laminating a can to a body.

[0006]

Means for Solving the Problems The method of laminating on a can according to the present invention has been proposed to solve the above-mentioned problem, and has the following constitution. That is, according to the present invention, a flexible film that cannot be held on its own is vacuum-adsorbed from a feed roll to a cutting roll and wound therearound, and in that state, the peripheral speed (V ₁ ) of the feed roll is changed to the peripheral speed (V) of the cutting roll.
₂ ) The method further comprises a step of dividing the vacuum suction portion of the cutting roll into a plurality of portions, and adjusting the vacuum strength of each of the vacuum suction portions, while making the process slower (V ₁ <V ₂ ). A method of laminating to a can is provided.

Further, according to the present invention, a flexible film which cannot be self-sustained is supplied to a cutting roll by a feed roll, and the film is wound on the cutting roll by vacuum suction, and the film in that state is wound around the cutting roll. lamination method is provided to a can body, characterized by comprising the step of cutting at speed (V ₂₎ in synchronous or even faster circumferential speed rotary cutter (V ₂ ≦ V ₃₎ of (V ₃₎ .

Further, according to the present invention, there is provided a step of transporting the film cut by the cutting roll by suctioning the film to the laminating roll under vacuum, and pressurizing the small holes on the laminating roll at the laminating portion. A method for laminating to the can is provided.

[0009] According to the present invention, the film may be composed of 1
A method for laminating to the above-mentioned can having a size of 5 μm or less is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings by way of embodiments. FIG. 1 is a cross-sectional view of a device for embodying an embodiment of the method of the present invention, in which a part of the device is omitted, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is an enlarged cross-sectional view of a main part, and FIG.
It is sectional drawing which follows a line. In the drawings, reference numeral 1 denotes a laminating apparatus embodying a method for laminating on a can according to the present invention. First, the laminating apparatus 1 will be described.
Next, the method of the present invention will be described using this apparatus 1. The laminating apparatus 1 holds a flexible film 2 to be laminated that cannot be held on its own in a rolled state and supplies the film 2 supplied from the film supply unit 4 with a feed roll 3 and a cutting roll 5. A film cutting section 7 to be cut off by a rotary cutter 6 and a laminating section for bonding a film 2 of one can cut by the film cutting section 7 to a can 10 supplied by a mandrel turret 9 on a laminating roll 8. 11 as a main component. The cutting roll 5, the rotary cutter 6, and the laminating roll 8 are synchronously driven by one motor (not shown), so that each of them can make a half turn for one can body.

The film supply section 4 has a holding roll (not shown) for holding the film 2 in a wound state.
From the holding roll, the film 2 is sandwiched between the feed roll 3 and the holding roll 3a and supplied to the film cutting section 7. At this time, holes may be formed in the feed roll 3 for vacuum-sucking the film 2. In addition, film 2
Is usually a rigid resin film having a thickness of about 15 μm or less.

As shown in FIG. 2, the cutting roll 5 of the film cutting section 7 is provided with a shaft 22 on a side surface 21 of a cylindrical body 20, supported rotatably by a bearing 24 on a main body frame 23, and provided by a gear 25. Driven. Six small holes 26 are formed in the circumferential surface 20a of the cylindrical body 20 at intervals of 15 ° in the axial direction, and 360 ° / 15 ° / row =
There are 24 rows, and all the 6 small holes 26 in one row communicate with 24 common holes 27 provided at intervals of 15 °, and communicate with one side surface 21 of the cylindrical body 20. A rotary valve 28 is attached to the side surface 21, and the rotary valve 28
7, a communication hole 28a is formed, communicates with the common hole 27, and slides in a sealed state against a fixed valve 29 spring-fixed to the body frame 23 (the sliding surface between the rotary valve 28 and the fixed valve 29). Is indicated by the line CD in FIG. 2).

This fixed valve 29 has a cutting roll 5
Arrow A in FIG. 1 so that the vacuum suction portion of FIG.
Direction, the first groove 29a to the fifth groove 29 having a width of about 30 °
e is engraved. The first groove 29a is located at a position where the film 2 supplied from the feed roll 3 is wound around the cutting roll 5, and hereinafter the second groove 29b
The fifth groove 29e is formed by the film 2 and the laminating roll 5
The first groove 29a to the fifth groove 29e are connected to the first groove joint 30a to the fifth groove 30e, respectively, and the first groove joint 30a to the fifth groove joint 30e are connected to the first groove 29a to the fifth groove 29e, respectively. Each of the joints 30e is connected to a first groove vacuum control valve (not shown) to a fifth groove vacuum control valve (not shown), and further connected to a vacuum source. Accordingly, the vacuum strength of the six small holes 26 in one row communicating through the common hole 27 to the communication hole 28 a of the rotary valve 28 sequentially associated with the first groove 29 a of the fixed valve 29 is determined by the vacuum control valve for the first groove. Can be adjusted freely. The same applies to the other second to fifth grooves 29b to 29e.

The rotary cutter 6 has a shaft 32
The holder 33 is attached, and the tip of the blade holder 33 is
The rotary blades 34 are attached at intervals of 0 °. And
Peripheral speed V of feed roll 3₁ Of the cutting roll 5
Peripheral speed V_Two Later, V₁ <V _Two And cutting rod
Peripheral speed V of rule 5_Two Is the peripheral speed V of the rotary cutter 6 _Three 
Or later than V_Two ≤V_Three (So, V
₁ <V_Two ≤V_Three ). Therefore, one of the cans 10
Length L per₁ Is V₁ X Places per can 10
Given by the required lamination time t, per can 10
Rotation length L of cutting roll 5_Two Is V_Two × t
available. The interval of the film 2 after cutting is L_Two -L₁ With
available. Therefore, (the peripheral speed V of the cutting roll 5_Two -Feed roll 3
Peripheral speed V₁ ) X Required laminate per piece of can 10
Time t = interval of the film 2 after cutting.

The laminating unit 11 converts the cut film 2 supplied to the laminating roll 8 into the can 10 supplied by the mandrel 51 of the mandrel turret 9.
Laminate to As shown in FIG. 3, the film 2 being conveyed to the laminating roll 8 has small holes 4 formed by vacuum.
Since the depressions 2a are formed in the six portions, when the laminate is laminated on the can body 10 as it is, no laminating pressure is applied to the depressions 2a, air cannot be discharged, and bubbles remain in those portions. Then, compressed air or the like is sent to the small holes 46 on the laminating roll at the laminating portion to apply pressure and the depressions 2a of the film 2 are eliminated, and details thereof are as follows.

That is, the laminating roll 8 is formed on the side surface 4 of the cylindrical body 40 in substantially the same manner as the cutting roll 5.
1 is provided with a shaft 42, rotatably supported by a bearing 43 on the main body frame 23, and driven by a gear 44. An elastic member 45 such as rubber is formed on a circumferential surface 40a of the cylindrical body 40. Small holes 46 are formed in the circumferential surface 40a and the elastic member 45 at intervals of 15 degrees in seven rows and six in the axial direction over 90 degrees. It is made one block at a time, and 9
Another small hole 46 is formed in the same manner, shifted by 0 °. The six small holes 46 in one row all communicate with the common hole 47 and communicate with one side surface 41 of the cylindrical body 40. A rotary valve 48 is attached to the side surface 41.
A communication hole 48a is opened corresponding to the common hole 47 and communicates therewith, and slides in a sealed state with a fixed valve 49 spring-fixed to the main body frame 23 (the sliding surface between the rotary valve 48 and the fixed valve 49 is This is indicated by the line EF in FIG. 4).

The fixed valve 49 is provided with a groove 49a having a width of about 165 ° in the direction of arrow B in FIG. 1 so as to collect the vacuum suction portions of the small holes 46 for each block of the laminating roll 8. A pressure groove 49b is formed in the vicinity of the groove 49a. The groove 49a extends from a position in contact with the cutting roll 5 to a position immediately before a position in contact with the mandrel turret 9 of the laminating section 11.
b is at a position in contact with the mandrel turret 9. Groove 4
A groove joint 50a is connected to the groove 9a, and a pressure groove joint 50b is connected to the press groove 49b.
0a is connected to a vacuum source (not shown),
Ob is connected to a pressure source (not shown).

Therefore, the small hole 46 communicating with the common hole 47 associated with the groove 49a is evacuated to a pressure state,
The small hole 46 communicating with the common hole 47 associated with the above is set in a pressurized state. Then, as shown in FIG. 3, the film 2 which is attached to the mandrel 51 of the mandrel turret 9 and is in contact with the supplied can 10 is pressed by a pressure source into a pressure groove 49b.
Since the small holes 46 leading to the associated common holes 47 are in a pressurized state, the depressions 2a are eliminated, and the laminating pressure is applied by the elastic member 45 of the laminating roll 8 to discharge air and perform good laminating. . The can body 10 supplied at this time is heated to a suitable laminating temperature by a heating device (not shown) immediately before lamination.

As is clear from the above description, a flexible film that cannot be held on its own can be wound around a cutting roll from a feed roll, and a tension is applied to the film on the feed roll by the cutting roll having a high peripheral speed to perform cutting. By adjusting the vacuum strength of multiple vacuum suction sites on the roll, the film on the feed roll with a slow peripheral speed is given a slip, a certain interval is created in the cut film, and the timing of lamination to the can body is adjusted. Will be able to gain.

A flexible film that cannot be held independently can be wound around a cutting roll by vacuum suction, and a rotary cutter having a peripheral speed synchronized with or faster than the peripheral speed of the cutting roll provides a suitable push-cut with excellent dimensional accuracy. Not only is possible, but also compressed air is sent to the small holes on the laminating roll at the laminating part and pressurized, so that pressure is applied to the vacuum suction part of the film at the time of lamination, so that air bubbles are generated between the can body and the film. Is not left and suitable lamination is performed.

Next, a method of laminating a can according to the present invention using the laminating apparatus 1 having the above-described configuration will be described. First,
A film 2 having a desired content printed thereon and in a wound state and a can 10 for laminating the film 2 are prepared and incorporated into the laminating apparatus 1. Since the film 2 is made of a resin having a thickness of 15 μm or less and has no rigidity and cannot be pushed in and sent out, the film 2 is passed between the feed roll 3 and the holding roll 3a, and is wound around the cutting roll 5 by vacuum suction.

When the laminating apparatus 1 is operated, the film 2 in a wound state can be sent out from the film supply unit 4 by the feed roll 3 and supplied to the cutting roll 5. The fast cutting roll 5 of the peripheral speed V ₂ to impart tension to the film 2 on the feed roll 3. Further, by adjusting the vacuum strength of the plurality of vacuum adsorption sites of the cutting roll 5, the slip is applied to the film 2 on the slow feed rolls 3 of the wind velocity V _1. This slip is to make a constant interval in the film 2 after cutting and to obtain a timing of lamination to the can body 10, and the adjustment of the vacuum strength is as follows.

That is, the fixed valve 29 has five grooves,
The first groove 29a to the fifth groove 29e are provided with the first groove 29a to the fifth groove 29e via the first groove joint 30a to the fifth groove joint 30e. It communicates with the vacuum control valve. On the other hand, rotary valve 2
8 communicates with a group of six small holes 26 via a common hole 27. The small hole 26 is inserted into the first groove 29a to the fifth groove 29e by the rotary valve 28 slidingly sealed to the fixed valve 29.
Since the groups communicate, the five grooves, the first groove 29a
The fifth groove 29e divides the vacuum suction part on the cutting roll 5 into five parts, and divides the five divided vacuum suction parts into the first groove vacuum control valve or the fifth groove.
The vacuum intensity can be adjusted by the groove vacuum control valve.

[0024] and the film 2 fed to the cutting roll 5 granted slipping is press-cutting at circumferential speed V ₂ in synchronization or more peripheral speed V ₃ of the rotary cutter 6 in cutting roll 5, the cutting roll 5 as , And vacuum-sucked on the laminating roll 8 to be delivered. This vacuum suction state is the same as in the case of the cutting roll 5 described above. Then, when the film 2 is conveyed to the laminating part on the laminating roll 8, the communication hole 48a of the rotary valve 48 is associated with the pressurizing groove 49b of the fixed valve 49, and compressed air flows from the pressurizing source to the small hole 46. Is supplied to the can body 10 which is attached to the mandrel 51 of the mandrel turret 9 and supplied, and the film 2 is formed by the laminating pressure of the elastic member 45 of the laminating roll 8. 1
0 is laminated.

Although the representative embodiment of the present invention has been described above, the present invention is not limited to this embodiment without departing from the gist of the invention.

[0026]

According to the present invention, a flexible film that cannot be held on its own can be wound around a cutting roll by vacuum suction from a feed roll, and tension is applied to the film on the feed roll by a cutting roll having a high peripheral speed. Adjusting the vacuum strength of multiple vacuum suction sites on the cutting roll to give the film a slip on the feed roll with slow peripheral speed, make a certain interval in the film after cutting, and the timing of lamination to the can body Get. Therefore, even a flexible film that cannot be held on its own can be sent out for lamination on a can body, and the timing of lamination can be given to the cut film, so that there is an effect that it can be used for lamination.

A flexible film that cannot be held on its own is
It becomes possible to wind around a cutting roll by vacuum suction, and a suitable push-cut can be performed by a rotary cutter having a peripheral speed synchronized with or higher than the peripheral speed of the cutting roll. Therefore, even if it is a flexible film having no stiffness and being unable to hold independently, it can be accurately pushed and cut by a rotary cutter, and the cutting process is more efficient.

Further, the small holes on the laminating roll at the laminating portion are pressurized with compressed air or the like so that pressure is applied to the vacuum suction portion of the film during lamination, so that air bubbles remain between the can body and the film. A good-looking laminate with good commercial value can be obtained without performing.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view in which a part of an apparatus embodying an embodiment of a method of the present invention is omitted.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged sectional view of a main part showing an embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view showing a conventional example.

[Description of Signs] 1 Laminating device 2, e film 2a depression 3 feed roll 3a holding roll 4 film supply unit 5 cutting roll 6 rotary cutter 7 film cutting unit 8 laminating roll 9 mandrel turret 10 can body 11 laminating unit 20, 40 cylinder Body 20a, 40a Circumferential surface 21, 41 Side surface 22, 32, 42 Shaft 23 Body frame 24, 43 Bearing 25, 44 Gear 26, 46 Small hole 27, 47 Common hole 28, 48 Rotary valve 28a, 48a Communication hole 29, 49 Fixed valve 29a to 29e First groove to fifth groove 30a to 30e First groove joint to fifth groove joint 33 Blade holder 34, d Rotating blade 45 Elastic member 49a groove 49b Pressing groove 50a Groove joint 50b Joint for pressurized groove 51 Mandrel a Rotary Tha method b fixed blade c abrasion material

Claims (4)

[Claims] 1. A flexible film, which cannot be self-sustained, is wound from a feed roll to a cutting roll by vacuum suction and wound, and in that state, the peripheral speed (V ₁ ) of the feed roll
With slow (V ₁ <V ₂₎ than the peripheral speed of the cutting roll (V _2), dividing the vacuum suction portion of the cutting roll into a plurality, and the vacuum intensity of these vacuum adsorption sites each adjustable A method for laminating to a can, comprising a step. 2. A self-supporting flexible film is supplied from a feed roll to a cutting roll, and this film is vacuum-adsorbed and wound on the cutting roll, and the film in that state is wound around the peripheral speed (V) of the cutting roll.
₂ ) A method of laminating on a can, comprising a step of cutting with a rotary cutter (V ₂ ≦ V ₃ ) synchronized with or faster than the peripheral speed (V ₃ ). 3. The method according to claim 1, further comprising a step of vacuum-adsorbing and transporting the film cut by the cutting roll onto a laminating roll, and pressing a small hole on the laminating roll at the laminating portion into a pressurized state. Laminating method for cans. 4. The method for laminating on a can according to claim 1, wherein the film has a thickness of 15 μm or less.