JPH0686010B2 - Web joining method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for joining webs, and particularly to webs having different shapes or materials (flexible strip metal plate, metal foil, flexible strip film, etc.). The method of joining webs for joining together.

[Prior art]

As a method for joining webs, there are a method in which the ends of the webs are overlapped with each other and then fused and bonded with a double-sided tape or ultrasonic waves, a method in which they are mechanically joined, and a method in which they are joined by welding.

FIG. 3 is an explanatory view of a conventional web joining method using welding. As shown in FIG. 3, the trailing web 70 is a roll 72.
It is rewound from the sheet, rolled on the pass roller 74, and conveyed to the joining device 76. The precutting device 78 of the joining device 76 is a cutter 80,
The leading end portion 70A of the trailing web 70 is cut by the pre-cutting device 78 and is formed so that it can be accurately butted against the trailing end portion 82A of the leading web 82 to be joined.

A welding device 84 is provided after the precut device 78, and the welding device 84 includes clamps 86 and 88 and a welding torch 90. The leading edge 70A of the trailing web 70 is held by the clamp 86, the trailing edge 82A of the leading web 82 is held by the clamp 88, and the trailing web 70 and the leading web 82 are butted against each other. TIG arc welding method is adopted as the welding method, and in addition to this welding method, MIG arc welding, gas welding, or CO ₂ ,
Laser welding such as YAG is available. The welding torch 90 melts and welds the ends 70A, 82A of the webs 70 while moving in the width direction of the webs 70, 82 from above the abutting portion. If the thickness of each web 70, 82 is 0.3 mm or less, the bonded web 7
Since the 0 and 82 are easily melted, it is desirable that the webs 70A and 82A are welded with a slight overlap.

A rolling device 92 is provided after the welding device 84.
92 is composed of a rolling roller 94 and a back bar 96, and the operation of the rolling roller 94 rolls the welded portion between the succeeding web 70 and the preceding web 82.

Further, conventionally, there is a joining method of joining webs to each other with a joining tape. Among these joining methods, there is a method in which the joining tape is made longer, and the ends of the web are joined at regular intervals without directly contacting each other (Japanese Patent Publication No. 61-27865).

[Problems to be solved by the invention]

However, in these conventional joining methods, when the plate thickness difference between the preceding web 82 and the succeeding web 70 is twice or more, it is difficult to set the joining conditions during ultrasonic welding or welding. There is. Further, if the material of the web and the surface treatment are different, there is a problem that ultrasonic fusion welding or welding becomes difficult.

Nowadays, when the web transfer process is complicated, such a problem is caused by the repeated folding of the joint during the transfer of the web, resulting in complete creases or the passage of the pass rolls under tension. Therefore, breakage at the joint is caused. In addition, in today's growing demand for a wide variety of products, it is indispensable to diversify the shapes and materials of the webs, and the conventional joining methods have a problem that the flexible measures required in the production plan cannot be sufficiently achieved.

The present invention has been made in view of such circumstances, in order to flexibly respond to changes in production plans and high-mix low-volume production,
An object of the present invention is to provide a method for joining webs, which has sufficient strength at the joining portion and can pass a pass roll or the like safely even if the joining webs have different shapes or materials.

[Means for solving problems]

In order to achieve the above object, the present invention relates to a method for joining a web in which a preceding web and a succeeding web having different web thicknesses are joined, in which the thickness of the preceding web and the thickness of the succeeding web are within a range. A dummy web formed on the front web and the subsequent web, the one end of the dummy web is joined to the trailing end of the preceding web, and the other end of the dummy web is joined to the leading end of the succeeding web. Is characterized by.

In order to achieve the above-mentioned object, the present invention provides a method for joining a web in which a preceding web and a succeeding web having different web widths are joined together, within the range of the web width of the preceding web and the web width of the following web. A dummy web having a width of 1 mm is disposed between the preceding web and the following web, one end of the dummy web is joined to the trailing end of the preceding web, and the other end of the dummy web is joined to the leading end of the succeeding web. It is characterized by doing.

[Action]

According to the method for joining webs according to the present invention, without joining the webs directly to each other, the webs are joined together using the dummy web as a medium, and when the webs having different shapes or materials are joined, the dummy web and the web are joined together. Since the shapes or materials can be approximated to each other, the setting of the joining conditions can be facilitated, the joining portion can have sufficient strength, and it is possible to flexibly cope with changes in the production plan and high-mix low-volume production.

[Embodiment]

Hereinafter, preferred embodiments of a method for joining webs according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of a web joining portion using the web joining method according to the present invention. As shown in FIG. 1, the end of the leading web 10 is connected to the leading end of the trailing web 14 via the dummy web 12. The leading web 10 is thinner than the trailing web 14 and is about 1/2 or less. Rolling oil is applied to the surfaces of the leading web 10 and the trailing web 14.

The dummy web 12 is made of a degreasing material and is made of a material having a longitudinal elastic modulus smaller than that of the preceding web 10 and the succeeding web 14. The length of the dummy web 12 is sufficiently shorter than that of the preceding web 10 and the following web 14 and is about 200 mm to 5,000 mm, preferably about 1,000 mm. Also, dummy web 1
2 is thicker than the thin leading web 10 and thinner than the thick trailing web 14, preferably about 1 to 1 of the leading web 10.
The thickness is set within the range of twice and the range of about 1/2 to 1 times of the succeeding web 14.

Both ends of the dummy web 12 are butt-joined or welded by butt-joining or minimally overlapping the ends of the preceding web 10 and the succeeding web 14, respectively, and the joints 16 and 18 are rolled. The welding is performed from above the joints 16 and 18, and the welding methods include TIG arc welding and MIG arc welding methods as well as gas welding or laser welding such as CO ₂ and YAG.
10, the succeeding web 14 and the dummy web 12 are selected and used according to the type.

According to the web joining method of the present invention configured as described above, the leading web 10 and the trailing web 14 are not directly welded and joined to each other via the dummy web 12. That is,
Using the dummy web 12 as the medium, the leading web 10 and the trailing web
The 14 parts are indirectly joined. Accordingly, when there is a large difference in thickness between the preceding web 10 and the succeeding web 14, the dummy web 12 approximates the thicknesses of the preceding and succeeding webs 10 and 14, so that the dummy web 12, the preceding web 10 and the succeeding web 14 It is possible to facilitate the setting of the joining conditions and to increase the strength at the joined portion.

Further, since the dummy web 12 is made of a degreasing material,
Even when the preceding web 10 and the subsequent web 14 are treated with rolling oil or the like, the welding can be facilitated and the welded portion can be strengthened.

In the above embodiment, the leading web 10 and trailing web 14
Although the use of the dummy web 12 in the case where the web widths of the preceding web 10 and the following web 14 are different is shown, the present invention is not limited to this and can be applied to the case where the web widths of the preceding web 10 and the succeeding web 14 are different. That is, when the width of the preceding web 10 is wider than that of the succeeding web 14, the dummy web 12 is smaller than the width of the preceding web 10 and larger than that of the succeeding web 14.
Desirably, the range is about 0.8 to 1 times that of the preceding web 10 and about 1 to 1.25 times that of the following web 14,
Set the web width of the dummy web. Even when joining webs having different web widths, the dummy web 12
Since the web widths of the leading web 10 and the trailing web 14 are similar to each other, sufficient strength can be given to the bonded portion.

In the above embodiment, the leading web 10 and the trailing web 14 are joined by welding, but the invention is not limited to this, and ultrasonic fusion or the like may be performed.

The web used in the present invention includes paper, plastic film, metal, resin coated paper, synthetic paper and the like. The material of the plastic film is, for example, polyolefin such as polyethylene or polypropylene, vinyl polymer such as polyvinyl acetate, polyvinyl chloride or polystyrene, polyamide such as 6,6-nylon or 6-nylon, polyethylene terephthalate, polyethylene-2,
Polyester such as 6-naphthalate, polycarbonate, cellulose triacetate, cellulose acetate such as cellulose diacetate and the like are used. A typical resin used for the resin coated paper is polyolefin such as polyethylene, but the resin is not limited to this. Also, as a metal web,
For example, there is an aluminum web.

〔Example〕

Next, a comparative test was performed between the web bonded according to the present invention and the web bonded according to the conventional bonding method.

[Example 1] The preceding web 10 is an aluminum web having a thickness of 0.15 mm and a width of 200 mm, the following web 14 is an aluminum web having a thickness of 0.40 mm and a width of 200 mm, and the dummy web is a thickness of 0.30 mm and a width of 200 mm. They were placed and butt-joined with a TIG arc welder. While applying a tension of 40 kg to this sample,
A pass roller passage test was conducted to determine how many rounds it takes to cut, with 10 rubber rollers of 100 and 10 rubber rollers of φ150 as one round. The results are shown in Table 1.

[Example 2] The preceding web 10 is an A6000 aluminum web having a thickness of 0.30 mm and a width of 200 mm, and the succeeding web 14 is an A6000 having a thickness of 0.15 mm and a width of 200 mm.
-Based aluminum web, dummy web 0.30 mm thick, width 20
A 0 mm A1000 aluminum web, placed between these, TI
Butt joining was performed with a G arc welder.

While applying a tension of 40 kg to this sample, a pass roller passing test was conducted to determine how many rounds it takes to cut, with 10 rubber rollers of φ100 and 10 rubber rollers of φ150 as one round.
The results are shown in Table 2.

As can be seen from Tables 1 and 2, it can be seen that the number of turns before cutting increases when joining is performed using a dummy web.

〔The invention's effect〕

As described above, according to the web joining method of the present invention, it becomes possible to sufficiently cope with a production plan that requires joining of a wide variety of webs, and even if the joining webs have different shapes or materials. , The bonding webs are easily bonded to each other with sufficient strength and safely passed through a pass roll or the like, which does not cause a problem in a post-treatment process or the like.

[Brief description of drawings]

FIG. 1 is a plan view of a joining portion between webs to be joined having different thicknesses, which is an example of a web joining method according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a conventional welding method. It is explanatory drawing of a joining apparatus. 10 …… Preceding web, 12 …… Dummy web, 14 …… Succeeding web, 16,18 …… Splice.

Claims (4)

[Claims] 1. A method of joining a web for joining a preceding web and a succeeding web having different web thicknesses, wherein a dummy web formed to a thickness within the range of the web thickness of the preceding web and the web thickness of the succeeding web. Between the leading web and the trailing web, one end of the dummy web is joined to the trailing end of the leading web, and the other end of the dummy web is joined to the leading end of the trailing web. Joining method. 2. A method of joining a web for joining a preceding web and a succeeding web having different web widths, wherein a dummy web formed to have a width within a range of the web width of the preceding web and the web width of the succeeding web. Between the leading web and the trailing web, one end of the dummy web is joined to the trailing end of the leading web, and the other end of the dummy web is joined to the leading end of the trailing web. Joining method. 3. The method for joining webs according to claim 1, wherein the dummy web is made of a degreasing material. 4. The method for joining webs according to claim 1, wherein the dummy web has a smaller longitudinal elastic modulus or yield strength than the preceding web and the following web.