JP4978333B2 - Cutting method - Google Patents

Description

  The present invention relates to a cutting method for cutting a wide strip sheet continuously fed into a cut sheet having a predetermined width and length.

  Conventionally, in order to form a cut sheet having a predetermined width and a predetermined length from the belt-like sheet, the continuously supplied wide belt-like sheet is divided into a plurality of belt-like sheets having a predetermined width by a slitter. A belt-like sheet having a predetermined width is supplied to a rotary cutter provided downstream of the slitter, and the belt-like sheet having a predetermined width is cut along the belt-like sheet width direction for each predetermined length by the rotary cutter (see Patent Document 1 below). .

  However, when the belt-like sheet is thick and relatively soft and easily deformed, such as a plastic film for optical use, the following problems occur when the conventional cutting method as described above is used. That is, a cut sheet that has been cut often becomes a defective product due to large burrs at the cut portion in the longitudinal direction or large irregularities on the cut surface.

Conventionally, a strip sheet is intermittently supplied to a punching device, and a cut sheet is formed by punching to a predetermined width and length by the punching device. In this case, the feeding of the strip sheet is completely performed. Punching after stopping once, then feeding, and punching / feeding are alternated, so the production speed cannot be increased and productivity cannot be improved.
Japanese Patent Laid-Open No. 10-94995

  In view of the above-described problems, the present invention efficiently cuts a wide-width sheet that is continuously fed into a plurality of cut sheets having a predetermined width and length, and a cut with a clean cut surface. The challenge is to obtain a sheet.

  Therefore, the present invention is a method of cutting a wide strip sheet continuously fed into a plurality of cut sheets having a predetermined width and length, and the wide strip sheet is cut by a first slitter. While dividing into a plurality of primary strips of the required width of the strips of ears of the wide strip sheet, the plurality of primary strip sheets are alternately distributed back and forth in the order in which they are arranged in the strip sheet width direction. The primary belt-like sheet in the subsequent running is divided into a secondary belt-like sheet having a predetermined width by cutting the ears of the primary belt-like sheet with a second slitter, and the secondary belt-like sheet is supplied to the rotary cutter. The secondary belt-like sheet is cut along the belt-like sheet width direction for each predetermined length by a cutter.

  In the present invention, since the cutting edge of the primary belt-like sheet is narrower than the secondary belt-like sheet, when the primary belt-like sheet is divided by the second slitter, the ear part of the primary belt-like sheet is the blade of the second slitter. Even if it competes for the thickness of the blade after receiving the incision, the cutting edge of the ear can easily escape from the blade in the width direction. Therefore, the competition between the blade of the second slitter cut into the primary belt-like sheet and the portion of the primary belt-like sheet that has received the blade cut is eased. Therefore, a plurality of primary belt-like sheets are alternately distributed back and forth in the order in which they are arranged in the width direction of the belt-like sheet, and the primary belt-like sheets that are running after the sorting are each cut by the second slitter. Further, by dividing the sheet into secondary strips having a predetermined width, burrs at the cut end and irregularities on the cut surface are reduced, and a secondary strip sheet having a clean cut surface can be obtained. When the wide strip sheet is divided by the first slitter, the blade of the first slitter cut into the wide strip sheet and the portion that has received the cut of the blade compete in the width direction by the thickness of the blade. Even if burrs are generated at the cut edge of the primary belt-like sheet or the unevenness of the cut surface becomes large, a secondary belt-like sheet with a clean cut surface can be supplied to the rotary cutter to form cut sheets one after another. . Therefore, according to the present invention, a cut sheet with a clean cut surface can be efficiently obtained, and the yield is greatly improved. Further, compared with the case of punching a wide belt-like sheet, there is no need for punching in the longitudinal direction of the sheet, so there is no waste in the longitudinal direction of the sheet and the sheet can be saved. Moreover, since the feeding of the wide belt-like sheet is not stopped during the cutting, the processing speed can be increased as compared with the prior art.

  FIG. 1 is a perspective view showing a main part of a cutting apparatus for carrying out a cutting method according to an embodiment of the present invention. This cutting apparatus applies a wide strip sheet S0 fed continuously to a predetermined one. For cutting a plurality of cut sheets CS having a width and a length, a wide belt-like sheet S0 is cut at both ears of the belt-like sheet S0, and a plurality of primary belt-like sheets having a required width. A first slitter 1 that is divided into S1 at the same time, guide rollers 2 and 2, and supply rollers 3 and 3 for distributing and traveling a plurality of primary belt-like sheets S1 alternately in the front-rear order in the order in which they are arranged in the belt-like sheet width direction, Each of the primary belt-like sheets S1 that are running after the distribution is provided between the guide roller 2 and the supply roller 3 that is divided into the cutting wastes T2 and T2 of the both ears and the secondary belt-like sheet S2 having a predetermined width. Second slitter 4 It includes a 4, and a rotary cutter 5 for cutting along a belt-like sheet width direction traveling to come secondary belt-like sheet S2 to the every predetermined length.

  The wide belt-like sheet S0 is unwound from a raw roll (not shown), and is continuously fed to the first slitter 1 through the feed roller 6. The feed roller 6 is a driven roller that can rotate at a set speed, and has a nip roller 6a for pressing the wide belt-like sheet S0 against its outer peripheral surface so as not to slip.

  The first slitter 1 is a known shear cutter in the embodiment shown in FIG. 1, and includes a plurality of sets of annular lower blades 7 and disk-shaped upper blades 8 that mesh with the lower blades 7. The lower blade roller 9 is attached, and the upper blade 8 is attached to the rotary shaft 10. The lower blade 7 and the upper blade 8 can rotate along the longitudinal direction of the belt-like sheet S0 that passes through the meshing portion thereof while rotating. The upper blade 7 and the lower blade 8 meshing with each other are arranged at two locations on both ears of the wide belt-like sheet S0 and at two locations therebetween. In FIG. 1, there are three primary belt-like sheets S1, but in the present invention, the number of divisions of the wide belt-like sheet by the first slitter can be changed as necessary.

  The second slitter 4 is also a shear cutter in this embodiment, and is disposed on the front and rear travel paths on which the primary belt-like sheet S1 sorted forward and backward travels. A plurality of sets of annular lower blades 11 and disk-shaped upper blades 12 meshing with the lower blades 11 are provided. The lower blades 11 are attached to the lower blade roller 13, and the upper blades 8 are attached to the rotary shaft 14. It is. While the lower blade 11 and the upper blade 12 are rotated, the belt-like sheet S1 passing through the meshing portion can be cut along the longitudinal direction. The upper blade 11 and the lower blade 12 that are meshed with each other are respectively arranged at both ears of each primary belt-like sheet S1.

  The lower blade roller 9, the lower blade roller 13, and the supply roller 3 are driven rollers that can feed the primary belt-like sheet S 1 at the same speed as the feed speed of the feed roller 6. The supply roller 3 has a nip roller 3a for pressing the primary belt-like sheet S1 on its outer peripheral surface so as not to slip.

  In order to be able to cut the secondary belt-like sheet S2 along the belt-like sheet width direction for each predetermined length, the rotary cutter 5 is configured such that, for example, the secondary belt-like sheet S2 is formed on a cylindrical outer peripheral surface plated with chromium. A driven backing roller 15 for backing, and a cutting blade 17 parallel to the width direction of the secondary belt-like sheet S2 mounted on a driven cylindrical rotating body 16 provided in parallel to the backing roller 15; When the cutting blade 17 rotates together with the rotating body 16 and the cutting edge of the cutting blade 17 hits the outer peripheral surface of the backing roller 15, the secondary belt-like sheet S2 on the backing roller 15 can be cut. . The backing roller 15 and the cutting blade 17 on the rotating body 16 rotate at the same speed as the feeding speed of the secondary belt-like sheet S2 by the supply roller 3, and the cutting blade 17 is 1 around the central axis of the rotating body 16. During the rotation, the secondary belt-like sheet S2 on the backing roller 15 is sent out by a length equal to the length of the cut sheet CS. In addition, instead of the above-described rotary cutter 5 as necessary, for example, provided with two cutting blades that are arranged so as to sandwich the secondary belt-like sheet, each rotating around an axis parallel to the width direction of the secondary belt-like sheet, You may use the well-known rotary cutter which cut | disconnects a secondary strip | belt-shaped sheet | seat by meshing of these two cutting blades. The cut sheets CS cut by the rotary cutter 5 are stacked below.

  In order to pick up and process the cutting edges T1, T1 of both ears of the wide strip sheet S0 divided by the first slitter and the cutting chips T2, T2 of both ears of the primary strip sheet S1 divided by the second slitter. A known cutting waste processing device 18 is provided below the first slitter 1.

  In order to cut the wide strip sheet S0 continuously fed into a plurality of cut sheets CS having a predetermined width and length by the cutting device configured as described above, before starting cutting, The leading end of the wide belt-like sheet S0 is guided from the feed roller 6 between the lower blade roller 9 and the upper blade 8 of the first slitter 1, and is divided by the first slitter 1 into a plurality of primary belt-like sheets S1, and the primary belt-like sheet. After S1 is passed between the front and rear guide rollers 2 and 2, it is alternately distributed back and forth in the order in which they are arranged in the width direction of the belt-like sheet, and passed between the lower blade roller 13 and the upper blade 12 of the second slitter 4. The secondary slit sheet S2 is divided by the second slitter 4 and the secondary belt sheet S2 is passed between the backing roller 15 of the rotary cutter 5 and the rotating body 16 through the supply roller 3 and The tip of the Chi debris T1, T1 and ear cutting scrap T2, T2 led to each cutting scrap processor 18 keep ready for cutting.

  The cutting width of the wide strip sheet S0 by the first slitter 1 is a width obtained by adding the widths of the cutting scraps T2 and T2 at both ears of the primary strip sheet S1 to the predetermined width of the cut sheet CS. The take-off tension of the ear cutting waste T2 to the cutting waste disposal device 18 is desirably as low as possible, and the width of the ear cutting waste T2 is preferably as narrow as possible within a range in which no trouble such as breakage occurs.

  After preparation for cutting, when the feed roller 6, the supply roller 3, the first slitter 1, the second slitter 4, the rotary cutter 5 and the cutting waste processing device 18 are started all at once, the following cutting method is executed. The

  That is, a plurality of primary belt-like sheets S1 are divided into a plurality of primary belt-like sheets S1 having a desired width by simultaneously dividing the wide belt-like sheet S0 by the first slitter 1 into the cutting wastes T1 and T1 of both ears of the belt-like sheet S0. Each of the strips is made to travel alternately in the front-and-back order in the width direction of the strip-shaped sheet, and the primary strip-shaped sheet S1 that is running after the sorting is cut by the second slitter 4 at both ears of the strip-shaped sheet S1, T2, T2, and predetermined The secondary belt-like sheet S2 is divided into widths, the secondary belt-like sheet S2 is supplied to the rotary cutter 5, and the rotary cutter 5 cuts the secondary belt-like sheet S2 along the width of the belt-like sheet every predetermined length. . Accordingly, the wide belt-like sheet S0 fed continuously is cut into a cut sheet CS having a predetermined width and a predetermined length.

It is a perspective view which shows the principal part of the cutting device for enforcing the cutting method which concerns on one Example of this invention.

Explanation of symbols

S0 Wide belt-like sheet S1 Primary belt-like sheet S2 Secondary belt-like sheet T1 Ear-edge cutting waste T2 of the wide-band-like sheet 1 First slitter 2 Guide roller 3 Supply roller 4 Second slitter 5 Rotary cutter 6 Feed roller 7 Lower blade 8 Upper blade 9 Lower blade roller 10 Rotating shaft 11 Lower blade 12 Upper blade 13 Lower blade roller 14 Rotating shaft 15 Back roller 16 Cylindrical body 17 Cutting blade 18 Cutting waste processing device

Claims (1)

  A method of cutting a wide strip sheet continuously fed into a plurality of cut sheets having a predetermined width and length, wherein the wide strip sheet is eared by a first slitter. The plurality of primary belt-like sheets are divided into a plurality of primary belt-like sheets of the required width and are allotted back and forth alternately in the order in which they are arranged in the belt-like sheet width direction, and the primary after running The belt-like sheet is divided into the edge strip of the primary belt-like sheet and the secondary belt-like sheet having a predetermined width by the second slitter, and the secondary belt-like sheet is supplied to the rotary cutter. A cutting method characterized by cutting a sheet along a belt-like sheet width direction at predetermined lengths.