JPS60166132A - Continuous manufacture of cover made of aluminum - Google Patents

Abstract

PURPOSE:To produce desired aluminium covers efficiently by positioning a sheet material made by laminating and sticking thin aluminium films in which notching of cover opening is made to a punching machine by a light sensor detection signal, and blanking the cover including the opening continuously. CONSTITUTION:A U-shaped notch 3 for the cover and a mark hole 13 for position detection are formed in the first thin Al film and a sheet material 14 is formed by laminating and sticking the second thin Al film on the back of above-mentioned thin film. Then, the sheet material 14 is carried to a cover punching machine and stopping of carrying and positioning of the sheet material 14 are made by a detection signal of the mark hole 13 by a light sensor, and the cover 1 including the opening 2 is punched continuously. Thus, Al covers notched surely as desired by half the thickness of the cover can be manufactured continuously.

Description

[Detailed description of the invention]

FIELD OF THE INVENTION The present invention relates to a continuous manufacturing method for continuously manufacturing an aluminum lid for a closed container, particularly an aluminum lid that is opened by removing a portion of the periphery of the lid along a score line.

[L Good 1] In general, for the lids of aluminum beer cans, juice cans, etc., a frontage is formed by making a cut to half the thickness of the lid using a press, and then pulling the handle connected to the opening with your fingers. This allows the opening to be torn apart. Since such a lid can be easily opened, there is a demand for its use in aluminum foil lids applied to container bodies made of plastic, paper, or the like. However, in the case of aluminum foil lids, the thickness of the aluminum foil is extremely thin compared to the thickness of the beer can lid, so a cut to form an opening is made by pressing only half of the thickness, similar to the beer can lid mentioned above. For this reason, there are two methods for opening the aluminum foil lids of plastic containers: one is to remove part or all of the lid from the opening of the container, and the other is to open the lid without removing it from the container. ]・
A method is used in which a part of the lid is pierced with a wax, but in the former method, part of the adhesive used to bond the lid to the container and part of the lid remain at the opening of the container, and The method discussed later had the disadvantage that it required a separate container to be attached to the container. An object of the present invention is to solve the above-mentioned drawbacks, and to make it possible to reliably make a cut by half the thickness of an aluminum foil lid, and to manufacture the lid continuously and efficiently. It is an object of the present invention to provide a continuous manufacturing method for aluminum lids. [In order to achieve the above object, the present invention provides a cover made of a sheet material formed by integrally laminating and bonding a first aluminum thin film layer, a second aluminum thin film layer, and an adhesive layer. The first aluminum thin film layer is formed by continuously punching out the opening of the lid and the mark hole for position detection, and the second aluminum layer is formed by punching out the opening of the lid and the mark hole for position detection, and the second aluminum layer is formed by punching out the opening of the lid and the mark hole for position detection. By integrally laminating and bonding the thin film layer with adhesive, it is possible to manufacture a product in which a notch is made to form the opening of the lid by half the thickness of the lid, and the bottom surface of the mark hole for position detection can be manufactured. Detects the reflected light with an optical sensor,
The sheet material was positioned with respect to the lid punching machine, and the lid was manufactured by continuously punching out the lid from the sheet material. That is, using a press that has a punched part that forms the opening of the lid to be manufactured and a punched part that forms the mark hole for position detection that are separated from each other by a certain distance, the first aluminum thin film layer is stamped at equal intervals. and position detection mark holes are successively punched out in order, then a second aluminum thin film layer is laminated and bonded with adhesive on the lower surface of the first aluminum thin layer, and then the second aluminum thin film layer is The entire lower surface is coated with an adhesive layer to form sheets 1 to 1, and then the sheet material is sequentially conveyed by a conveying means to a lid punching machine equipped with an optical sensor, and the optical sensor is used to form the bottom surface of the mark hole for position detection. Detecting the foul light of It was configured to be pushed out. According to the second structure, after forming the swallow opening in the first 1g aluminum layer by pressing, the entire lower surface of the second aluminum thin film layer is covered with an adhesive layer to form the lid opening. The notch can be reliably placed in the cylinder by half the thickness of the lid, and by pulling up the opening of the lid relative to the lid, the second The aluminum thin film layer can be cut, the lid opening can be easily opened, and there is no need to attach a separate straw to break the lid.
Manufactures a lid that can reliably remove the opening from the container, with less of the lid remaining on the container than when the entire lid is removed from the container, since the area of the opening part is small compared to the entire lid. can do. In addition, since an opening and a position detection mark hole are formed in the sheet, the position detection mark hole can be detected by an optical sensor.
To reliably and continuously efficiently manufacture a lid including a lid opening from a sheet material using a lid punching machine. Furthermore, when attaching a position detection mark to a sheet material by printing, the printing process of the mark and the process of forming the lid opening are performed separately, which tends to cause misalignment in the positional relationship between the mark and the lid opening. , it was necessary to print marks with high precision. However, according to the present invention, the mark hole for position detection is punched out in the first aluminum thin film layer simultaneously and reliably with a press when forming the opening of the lid, and the sheet shrine is positioned by the reflected light from the bottom of the mark hole. Now, if the press is equipped so that the punched part that forms the lid opening and the punched part that forms the mark hole for error detection are kept at a constant distance from each other, the opening of the lid and There is no deviation in the positional relationship of the position detection mark holes. That is, for example, a colored layer is provided at a predetermined location on the upper surface of the second aluminum thin film layer, and the first aluminum 1W
When the adhesive bonding the IG1 layer and the second aluminum thin film layer is made transparent so that the light reflected from the colored layer is transmitted through the adhesive described in 1-1 and detected by the optical sensor, The step of providing a colored layer on the aluminum thin film layer can be carried out with almost no consideration given to the Q position relationship with the lid opening. 2
When the adhesive between the aluminum thin film layer and the aluminum thin film layer contains a desired pigment, there is no need to provide a colored layer on the second aluminum thin film layer, and no special process for marking is required at all. Therefore, the intended purpose can be achieved as described above. Large 1 Eye 1 The present invention will be specifically explained below based on the illustrated embodiments. As shown in FIG. 1, the aluminum lid 1 manufactured by the method according to this embodiment has an opening tensioning tab 2a protruding from a part of the outer periphery of the disc-shaped lid body 1a, and a tab 2a for pulling the opening from the tab 2a. A U-shaped notch 3 is provided up to the center of the main body by about half the thickness of the lid 1 to form a frontage 2, and the periphery of the lid main body 1a is brought into close contact with a container opening (not shown) to close the container. While sealing the lid, the tab 2a is pulled up against the lid 1 to open the opening 2. As shown in FIGS. 2 and 3, this Ml is formed by making a U-shaped notch 3 in the first aluminum thin film layer 8 with a press 20 to form an opening 2, and forming a position detection mark hole 13. Adhesive 9 on the bottom surface of the first aluminum 3J film layer 8
The second aluminum thin film layer 10 is laminated and bonded by dry lamination, and the bottom surface of the film adhesive layer 12 for adhering the lid 1 to the container is attached to the bottom surface of the second aluminum thin film layer 10. At 23, the v4 layer is glued and becomes C. 4-2 The first aluminum thin film layer 8 has a U-shaped notch 3.
will be established. Therefore, along this notch 3, the tab 2a
When pulling up and opening 2, the second aluminum @ film layer 10 is cut at the cut end face of the first aluminum thin film layer 8, so that the opening 2 of Ml is obtained. be. Therefore, the first aluminum il film layer 8
It is preferable to use a hard material, but due to problems in forming the lid 1, a soft material may be used. Also, above! The aluminum thin film layer 10 is cut at the notched end face of the first aluminum thin film layer 8, and is provided with a colored layer at a predetermined location on its upper surface to reflect reflected light from the beam. Further, the adhesive 9 for bonding the first aluminum thin film layer 8 and the second aluminum thin film layer 10 is transparent and transmits the reflected light from the optical sensor. On the other hand, the adhesive layer 12 is made of a film-like material.
It is preferable to form the aluminum thin film layer 10 by laminating and adhering it to the entire lower surface, but for example, it may be formed by coating the entire lower surface of the second aluminum WI layer 10 with an adhesive so as to have a thickness of 50 μm or more. You can also do this. This adhesive layer 12 is placed on the adhesive surface made of polyethylene resin at the opening of a container made of plastic, paper, etc., and the lid 1 is thermally bonded to the container by a heat sealing method. Therefore,
This adhesive layer 12 has a heat seal strength of 1.5 to 2.5.
A range of kM15n+m is preferred. This adhesive layer 12 secures the contents inside the container to the second aluminum thin film layer 10.
It is necessary not only to prevent the material from permeating the material, but also to not be altered by the contents. For example, synthetic resins such as ionomers, polyolefins, and EVA are preferable. The adhesives 9 and 23 for laminating and adhering the first aluminum thin film layer 8, the second aluminum thin film layer 10, and the adhesive layer 12 are preferably polyester or polyurethane adhesives. Next, a method for continuously manufacturing an aluminum lid according to this embodiment for continuously manufacturing the lid 1 having the above structure will be explained. First, as shown in FIG. 4(a), the first aluminum film layer 8 is unwound, passed through a press 20, and wound onto a rewind roller 18 from a roller 15. At this time, the winding of the first aluminum thin film layer 8 on the winding a-ra 18 is stopped at regular intervals, and the first punched part 20a forming the opening 2 and the position detection mark hole 13 are removed. The second punched portions 2()b to be formed are made by continuously making cuts 3 at predetermined intervals during the vertical movement of the press 20, which is provided with a U-shaped spaced apart for a certain period of time.
) to form the frontage part 2 of the lid 1 and to punch out the position detection mark holes 13,13. Next, as shown in FIG. 4(1)), the first aluminum thin layer 8 is unwound from the unwinding roller 15, and the second aluminum thin film layer 1 is unwound from the other unwinding roller 15.
0 is rewound, the adhesive 9 is applied to either the first aluminum thin film layer 8 or the second aluminum thin film layer 10, and then the pressure roller 1 is applied by the 1-Lylaminate 1- method.
7 and 17, they are integrally laminated and bonded to form a laminated intermediate body 2Y. Next, as shown in FIG. 4(b), the adhesive layer 12 is rewound from the unwinding roller 15, and the adhesive 23 is applied to either the adhesive layer 12 or the laminated intermediate body 27, and then The pressure of the pressure roller 17.17 causes the adhesive layer 12 to
and the laminated intermediate body 27 are integrally laminated and bonded to form the material 14 on the sheet 1, and the material 14 is wound on the winding roller 18. Next, as shown in FIG. 4(C), the sheet material 14 is rewound by an unwinding roller 15, passed through a lid puncher 25, and wound onto a winding roller 18, which is a conveying means.
The colored layer of the second aluminum thin film 110 on the bottom of the mark hole 13 for position detection of the sheet vj14 is used to return the sheet vj14 to the adhesive 9 by the optical sensor 2G provided in the lid handling machine 25.
The sheet material 14 is temporarily stopped at a predetermined position relative to the lid puncher 25 based on this detection signal, and the lid puncher J! A large number of lids 1 including the openings 2 are continuously punched out from the sheet ttA14 by the lid punching section 25a of 125, and the lids 1 are manufactured in a large number. The continuous punching operation of the lid 1 is performed by the Jqz punching parts 25a, 25a, which can punch out a large number of Ml, . . . , 1 at once. . . , 1, but the lid punching unit that punches out one lid may continuously punch out the lids 1 one after another. According to the above embodiment, there are two aluminum thin film layers,
After setting a notch 3 to form an opening 2 in advance in one aluminum thin film layer 8 and punching a position detection mark hole 13, both aluminum thin film layers 8 and 10 are laminated and bonded, and the other A colored layer is provided at a predetermined location on the upper surface of the aluminum thin film layer 10 of the position detection mark hole 13.
By keeping it facing the bottom surface of the colored layer, the light reflected from the colored layer is detected by the optical lens 2G to position the seams 1-vJl 4, and the cover of Z) 1 is pressed (pushing the cover 25 continuously). In order to remove it, make a cut 3 between Ml to form part 2.
It is possible to install it reliably and easily by half the thickness of the
Then, pinch the tough 2a and cut the opening 2 along this notch 3.
By pulling up with respect to Ml, the second aluminum thin film layer 10 and the lower protective film layer 11 can be cut at the end face of the cut 3 of the first aluminum film layer 8, and the gap U between the lid 1 can be cut.
A garment 1 whose part 2 can be easily opened can be continuously manufactured. Moreover, since the opening 2 provided in a part of the lid 1 is pulled up against the lid 1 to open it, the lower adhesive layer 1 of the lid 1
Since the rupture area at the adhesive part between No. 2 and the llfJ opening aging surface is extremely small compared to when the entire lid is removed from the container, there is no chance that some of the adhesive layer 12 or Ml will remain at the opening of the container. or almost disappear. In addition, at the same time, a notch 3 is provided in the first aluminum thin film @ 8 to form the opening 2 of Hl.
A second aluminum thin film layer 10 having a colored layer at a predetermined location on the upper surface is laminated and bonded with a transparent adhesive 9 to the first aluminum thin film layer 8 with holes 13 formed thereon.
By leaning, the L facing the bottom of this mark hole 13
Since the reflected light of the colored layer is detected by the optical sensor 26 and the position of the sheet material 14 relative to the lid punching machine 2 is determined, the first and second punching parts 2 provided in the press 20
If the positional relationship between 0a and 20b is kept constant, the positional relationship between the opening 2 of the lid 1 and the mark hole 13 will not shift. On the other hand, conventionally, when printing a position detection mark at a predetermined position of the sheet-shape 14, forming an opening 2 of Ml on the sheet-shape 14 and printing the position detection mark. Because these steps were performed separately, discrepancies often occurred in the positional relationship between the two. According to this embodiment, this shift can be reliably prevented as described above. Note that the present invention is not limited to the above embodiments, but
Various other aspects (“implementation”). For example,
7' An adhesive 160 is placed on the upper surface of the aluminum thin film layer 8, and an adhesive 24-C is placed between the second aluminum thin film layer 10 and the adhesive layer 12. A side protective film layer 11 may be provided. 1. Also, the upper protective film layer 7 is designed to protect against sclerosis caused by the puncture of dirt and soft packaging. In addition to protecting the printed matter, the first aluminum thin film layer 8 also functions to prevent scratches and stains. For this reason, examples include poly1 stell, polypropylene,
Polyethylene and lζ are preferably resins made by appropriately synthesizing these. A U-shaped cut 3 is provided in the upper protective film layer as well as the first aluminum thin film layer 8. Further, the lower protective film layer 11 prevents the contents inside the container from penetrating to the second aluminum thin film layer 1o, and is made of, for example, polyester, polypropylene, polyethylene, or the like. The aluminum lid according to this second embodiment is manufactured by the following continuous manufacturing method. As shown in FIG. 6(a), first, each rewinding roller 1
5. Unwind the upper protective film layer 7 and the first aluminum thin film layer 8 in step 15, and apply the adhesive 1 to either the upper protective film layer 7 or the first aluminum thin film layer 8.
6 is applied and integrally laminated and bonded using pressure rollers 17 and 11 to form a laminate 19, which is then wound onto a winding roller 18. Next, as shown in FIG. 6(b), the laminated body 19 is unwound, passed through a press 20, unwound from the roller 15, and wound up [1-The laminated body 19 is wound at regular intervals. The winding on the winding roller 18 is stopped at J1. : 1
), the first punched part 20a forming the frontage 2 and the second punched part 20b forming the position detection mark hole 13 are spaced at a constant interval of 1! Ii CMA LC Press 20
By the 11τ movement, notches 3 are continuously set at predetermined intervals to form the frontage 2 of the swallow 1, and position detection mark holes 13.43 are punched out. Next, as shown in 71 to J in FIG. 6(C), the laminate 19 is
At the same time, the second aluminum R film II 10 is rewound by the unwinding roller 15, and the adhesive 9 is applied to each of the laminate 19 or the second aluminum thin layer 10. After coating on one side, the first fI layer intermediate lA21 is formed by integrally laminating and adhering using pressure rollers 17, 17 by a dry laminating method. On the other hand, the lower protective film layer 11 and the film-like adhesive layer 12
are rewound with rewind rollers 15 and 15, and after applying adhesive 24 to either the lower protective film layer 11 or the adhesive layer 12, the Jull pressure roller 17.
A second laminated intermediate body 22 is formed by integrally laminating and adhering them under pressure 17. Next, the adhesive 23 is applied to either one of the first and second laminated intermediate bodies 21 and 22, and then the pressure roller 17°11 is applied.
The intermediate bodies 21 and 22 are integrally laminated and bonded together under pressure to form the sheet material 14, and the sheet material 14 is wound up on the winding roller 18. Next, as shown in FIG. 6(d), the sheet material 14 is
While being rewound by the unwinding roller 15, the material is passed through the lid punching machine 25 and wound onto the winding roller 18, which is a conveyance means, to handle the lid pushing Ij! 125 detects the light that is reflected by the colored layer of the second aluminum thin film layer 10 on the bottom surface of the mark hole 13 for position detection of the sheets 1 to 14 and that has passed through the adhesive 9. In response to the detection signal, the sheet material 14 is temporarily stopped at a predetermined position relative to the lid puncher 25, and a large number of lids 1 including the frontage portion 2 are removed from the sheet material 14 by the collar punching section 25a of the lid punching machine 25. is continuously punched out to produce a large number of lids 1. According to the second embodiment, the upper and lower protective film layers 7.1
1 by 1. Reinforcement of the second thin aluminum layer 8.10 can be provided. In addition, as a specific numerical example of the thickness of each layer in this example, the upper protective film layer 1 is 12μ
, the first aluminum thin film layer 8 is 65μ, the second aluminum thin film layer 10 is 35μ, the lower protective film 8!11 is 1
2μ, and the adhesive layer 12 has a thickness of 30μ. In another embodiment, instead of providing a colored layer on the upper surface of the aluminum thin film layer 10 of the nail 12, the adhesive 9 contains a desired if lfA, and the reflected light of the pigment is detected by the optical sensor 26. You can also do this. In this case, there is no need for any printing process for the mark. Furthermore, the first part of the above-mentioned bracelet 20. second punched part 20a,
2 (Instead of moving the lb up and down, first and second punching parts are provided protrudingly on the outer peripheral surface of the rotating roller for press, and the notches 3 and mark holes 13 are continuously formed by the rotation of the rotating roller. Also, in the lid punching 11N25, instead of the punching part 25a moving up and down, a punching part is provided protruding from the outer peripheral surface of the rotary roller for lid punching, and the punching part 25a is moved vertically. Sea 1 due to rotation
-Many Otsu 1 from material 14. ..., 1 may be punched out continuously. Furthermore, when installing the opening forming notch 3, a curved notch stopper 2b is placed at the same time so as not to create an unnecessary cut in the lid 1 along the notch 3 when the opening 2 of the Ml is visible. It may also be provided as shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a lid 1 according to a continuous manufacturing method for aluminum lids according to an embodiment of the present invention, FIG. 2 is a partial plan view of a sheet material 14 used in the above method, and FIG. is ■ in Figure 2
4(a) to 4(C) are explanatory diagrams showing the manufacturing process according to the above method, respectively, and FIG. m -I[I l511
FIGS. 6(a) to 6(d) are explanatory diagrams showing manufacturing steps of methods according to other embodiments, respectively. 1... Lid, 2... Opening, 2a... Tab, 3...
- Cut, 7... Upper protective film layer, 8... First
Aluminum thin film layer, 9...adhesive, 10...second
Aluminum thin film layer, 11...lower protective film layer,
12... Adhesive layer, 13... Mark hole for position detection,
14...Sheet material, 16,23.24...Adhesive,
18... Winding roller, 19... Laminate, 20...
・Press, 20a...first punching part for forming the frontage part, 2
0b...Second punched part for forming mark hole for position detection, 2
5... Lid punching machine, 26... Optical sensor. Patent Applicant Lean Aluminum Industry Co., Ltd. Agent Patent Attorney 2 persons Figure 4 (0) Figure 4 (C) too 250 ZOOto.

Claims (1)

[Scope of Claims] ('1) A first aluminum plate is manufactured using a press having a punched part forming the frontage of the lid to be manufactured and a punched part forming the position detection mark hole separated from each other by a certain distance. Openings and mark holes for detecting the 1L position are successively punched out in the thin film layer at regular intervals, and then a second aluminum thin film layer is laminated and bonded to the bottom surface of the first aluminum thin film layer with an adhesive. Then, the entire lower surface of the second aluminum thin film layer is coated with an adhesive layer to form sheets 1 to 1, and the sheet material is sequentially conveyed by a conveying means to a photosensor adhesion punching machine as described above. A light sensor detects the reflected light from the bottom of the position detection mark hole, and in response to the detection signal, the conveyance by the conveyance means is stopped and the sheet material is positioned with respect to the lid handling machine, and then, A continuous manufacturing method for aluminum lids, characterized in that the candy including the opening is continuously pressed and handled by a lid punching machine. (2) A colored layer capable of emitting reflected light to be detected by the optical sensor is provided at a predetermined location on the upper surface of the second aluminum thin film layer, and the first aluminum thin film layer and the second aluminum 'a-film layer The continuous manufacturing method for aluminum lids according to claim 1, wherein the adhesive between the adhesives is transparent.