JPS62188697A - Method of punching web - 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] [Industrial Application Field] The present invention is directed to forming a punched portion in a web, which is used when moving and adjusting the cutting blade of a slitter device that cuts the web in the width direction of the web. It concerns a method for

[Conventional technology]

For example, when manufacturing printing plates, a slitter device is used to cut a web made of thin aluminum plates into a width corresponding to the size of the original plate. This slitter device is equipped with cutting blades consisting of an upper blade and a lower blade, which are respectively arranged above and below the web. and,
By adjusting the position of this cutting blade in the width direction of the web, the cutting width of one web is determined. Furthermore, some slitter devices are equipped with a trimmer function that trims both side edges of the web using separate upper and lower cutting blades.

By the way, when changing the cutting width of the web or changing the trimming width while using the above-mentioned slitter device, it is necessary to move each cutting blade in the width direction of the web.

In this case, in order to change the position of the cutting blade without reducing work efficiency, it is necessary to avoid the trouble of pulling the web out of the slitter device, and to adjust the position of the cutting blade while leaving the web in the slitter line. It is desirable to keep it.

Considering this situation, it is not possible to move the cutting blade while it is still engaged with the nib, so when changing the trimming width, it is necessary to form a notch on the side edge of the web. When this notch reaches the position of the cutting blade, the cutting blade is moved in the width direction to change the width of the trimming.

Also, when applying a cutting blade for slitting to the center of the width of the web in order to halve the width of the web, for example,
The upper and lower cutting blades are made to engage with each other at a punched portion formed in the center of the web, and cutting is started from this punched portion as a starting point.

Techniques for forming notches and punched portions in the web that are used when changing the trimming width or cutting width of the web as described above include, for example, Japanese Patent Laid-Open No. 52-71783; There is one known from JP-A-58-81515.

[Problem that the invention seeks to solve]

However, in the methods shown in the above-mentioned publications, punching dies are arranged above and below so as to sandwich the web, which increases the equipment cost due to the increased number of mechanical structural parts. The important point is that high precision is required in the installation position of the lower mold. 1. There is also a method of forming a notch by, for example, turning a rotating round blade within the plane of the web, but there is a limit to the amount of rotation of the round blade, and the edge of the web However, there are disadvantages in that only a notch can be formed, and the shape of the notch cannot be made arbitrary.

The present invention has been made in view of the above-mentioned shortcomings of the prior art, and it is possible to create punched parts and notches used for adjusting the position of the cutting blade without using expensive equipment, and in addition, the shape can be changed to any desired shape. The purpose is to provide a web punching method that can be easily determined.

[Means for solving problems]

In order to achieve the above object, the present invention installs a cutting blade having a contour equal to the shape of the punched part to be formed in the web, facing one side of the web, on the inlet side of a slitter device that cuts the web. At the same time, a backup plate with a flat surface is installed at a position facing the cutting blade across the web, and at least one of the cutting blade and the backup plate is pressed against the web, and the gap between the two is pressed. By sandwiching the web between the blades, the web is punched into the shape of the cutting edge.

An embodiment of the present invention will be described below with reference to the drawings.

(Example) In FIG. 1 showing an outline of a slitter line using the present invention, a web 1 to be cut is fed by rollers 2 and 2.
, it is sent to the right in the figure. As the web 1, for example, there is an aluminum web used as a printing plate material, and the maximum thickness thereof is about 0.5 mm.

A disk-shaped upper blade 3 and a lower blade 4 are provided within the traveling line of the web 1 so as to sandwich the web 1 therebetween. The upper blade 3 and the lower blade 4 constitute a cutting blade 5 for a trimmer that cuts the side edge of the web 1 to a predetermined width along the feeding direction of the web 1, and when changing the trimming width, , are moved in the width direction of the web 1 by the cutting blade moving mechanism 6.

Note that when changing the cutting width of the web l to half the width, a cutting blade for a slitter (not shown) provided separately from the cutting blade 5 for trimming is made to bite into the web l. move it.

At this time, the cutting blade 5 for the trimmer is also used, and the cutting width of the web 1 is maintained at a predetermined value.

In front of the cutting blade 5, the web 1 has a punched portion 8. Notch 9 (
A punching device 10 is provided for forming a die (see FIG. 3). As shown in FIG. 2, the punching device 10 includes drum rolls 11.
Contains 12.

A semi-cylindrical support 16 is fixed to the drum roll 11 in which cutting edges 14, 15, 15 which define the shapes of the punched portions 8 and the notches 9 are embedded.

The drum roll 11 is rotatably supported by a frame 18 by a bearing 17, and is connected to a motor (
(not shown). Also, the other drum roll 1
2 is configured as a cylindrical roll whose surface is lined with rubber, and is rotatably supported by a lever 22 that is raised and lowered by a fluid pressure cylinder 20.

Before changing the I/rimming width of the web 1, when forming the notch 9 in the web 1, the fluid pressure cylinder 20
Activate. Then, the lever 22 lifts up the lower surface of the web 1, so that the upper surface of the web 1 is strongly pressed against the cutting edge 15, and a notch having the same shape as the cutting edge 15 is formed in the web 1. 9 is formed. Of course, after the time required to form the notch 9 has elapsed, the operation of the hydraulic cylinder 20 is stopped and the drum roll 12 is returned to its initial position. Note that in order to reliably remove the punched pieces, a sponge or spring for removal may be provided near the cutting blade 15.

In order to perform this punching process while the web 1 is running, the drum roll 11 is driven in synchronization with the feed speed determined by the feed roller 2. Also, drum roll 12
is rotated following the web l.

In this manner, the feed amount of the web 1 is measured from the time when the punching device IO is activated, and when the notch 9 reaches the position of the cutting blade 5, the feed of the web 1 is stopped. Then, by adjusting the position of the cutting blade 5 using the cutting blade moving mechanism 6, the width of trimming can be changed. Note that when the notch 9 is formed, the punched part 8 is also formed at the same time, so if you want to cut the cutting width of the web 1 in half, you can insert a cutting blade for a slitter into the position of the punched part 8. good.

FIG. 4 shows different positions of the drum roll 11 in the circumferential direction (
At the position shown by the two-dot chain line in FIG.
．． An example is shown in which the cutting blades 14 and 15 are fixed separately via the fins 25. According to this embodiment, by setting the initial position of the drum roll 11 before pressing the drum roll 12, it is possible to select whether to form the punched portion 8 or the notch 9 in the web 1. Be able to do things.

Furthermore, in the embodiment shown in FIG. 5, the cutting edge 14.
15 is embedded in a plate-shaped support 28, and in place of the drum roll 12, a bank up plate 29 made of a metal plate with a flat surface is used. When forming the punched portion 8 and the notch 9, the feeding of the web 1 is temporarily stopped, and then the back amplifier plate 29 is raised by a fluid pressure cylinder or the like, similar to the embodiment described above. A punched portion 8 or a notch 9 can be formed in the hole.

In addition, in order to improve versatility by making it possible to cope with wider webs, it is also possible to add cutting blades 14 for forming punched portions 8 in the width direction of the web.

〔Effect of the invention〕

As described above, according to the present invention, it is only necessary to press the cutting blade from one side of the web and back up the web on the other side, so punching dies are installed on both sides that sandwich the web. There's no need.

Therefore, it is no longer necessary to maintain the mutual positions of the molds with high precision as in the past, and maintenance and management become extremely simple, and at the same time, equipment costs can be reduced. Furthermore, by simply changing the shape of the cutting edge, the shape of the punched portion or notch can be changed as desired.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a slitter line using the present invention. FIG. 2 is a sectional view of a main part of a punching device used in the present invention. FIG. 3 is a perspective view showing the state after punching. FIG. 4 is a perspective view showing another embodiment of the punching device. FIG. 5 is a perspective view showing still another embodiment of the punching device. 1... Web 5... Cutting blade 8... Punching section 9... Notch lO... Punching device 11.12... Drum roll 14.15... Cutting blade. Figure 1 Figure 2 Figure 4

Claims (4)

[Claims] (1) On the entrance side of the slitter device that cuts the web along the running direction, a cutting blade having the same shape as the punching part formed in the web is provided opposite to one surface of the web, and the cutting blade is A receiving surface is provided opposite the other surface of the web so as to sandwich the web between the two, and by pressing at least one of the cutting edge and the receiving surface toward the other, the gap between the two is A web punching method characterized in that the web is sandwiched between the two and the web is punched into the shape of the cutting blade. (2) The cutting blade is fixed to a roller that rotates around a rotation axis perpendicular to the running direction of the web, and forms a punched part in the web while rotating this roller in synchronization with the running of the web. 2. A method for punching out a web according to claim 1, wherein the web is punched out in a continuous manner. (3) The cutting blade is fixed to a plate member parallel to the web, and the receiving surface is composed of a plate member with a flat surface, and after stopping the running web, the cutting blade and the plate member are fixed to each other. 2. A method for punching out a web according to claim 1, wherein the punched portion is formed by sandwiching the web between the webs. (4) Cutting blades of different shapes are fixed to the roller at different positions in the circumferential direction, and the cutting blade to be used can be selected by adjusting the rotational position of the roller. A web punching method according to claim 2, characterized in that: