JP2011177868A - Cutting method for web, and cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting method and a cutting device capable of narrowing an abolition part provided between products when wide width is multi-thread-cut to a plurality of products. <P>SOLUTION: Upper blades 29, 31 are urged to upper blade pressing parts 27, 28 of upper blade holders 24, 25 by plate springs 30, 32. The plate springs 30, 32 are pressurized and fixed to the upper blade holders 24, 25 by screws 40, 42. A head part of the screw 40 of the upper blade holder 24 is stored in a notch 50 of the upper blade holder 25, a notch 52 of the upper blade 31 and a notch 54 of the plate spring 32. Whereas, a head part of the screw 42 of the upper blade holder 25 is stored in a notch 60 of the upper blade holder 24, a notch 62 of the upper blade 29 and a notch 64 of the plate spring 30. Cutting is performed while extracting the inside of the web W while pressing the upper blades 29, 31 to lower blades 33, 34. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a web cutting method and a cutting apparatus, and more particularly to a web cutting method and a cutting apparatus capable of narrowing a waste portion between products generated during cutting.

  A product in which a photosensitive layer is coated on a web (for example, a photosensitive lithographic printing plate (hereinafter referred to as “PS plate”) is generally formed on a web original made of a sheet-shaped or coil-shaped aluminum plate, for example, grained, anode It is manufactured by performing surface treatment such as oxidation, silicate treatment, and other chemical conversion treatment singly or in combination, then applying a photosensitive solution and drying treatment, and then cutting the web material into a desired size.

  In the cutting of the web having the surface coated with the photosensitive layer, the portion where the photosensitive layer is deformed by contact with the blade is "fogged" and cannot be used as a product. When multi-cutting a plurality of products from a wide width, it is necessary to discard the portion where the upper blade contacts the photosensitive layer. Therefore, the waste part is provided between the products by using the pair of the upper blade and the lower blade, and cutting the web while hollowing out.

  For example, in Patent Document 1, two disc springs are back-to-back to stably press the upper blade of the disposal unit against the lower blade, and a spacer is inserted between the two disc springs to make the lateral pressure on the disc spring uniform. To disclose.

JP 2000-108536 A

  However, in Patent Document 1, since the spacer is inserted between the two disc springs, the width of the discarding portion is widened and the web is wasted.

  The present invention has been made in view of such circumstances, and a web cutting method and a cutting apparatus capable of narrowing a waste portion provided between products when multiple cutting is performed from a wide width to a plurality of products. The purpose is to provide.

  According to one aspect of the present invention, the two upper blades are installed on the same shaft so that the blade edge is on the outside, and the upper blade is applied by the elastic force of two disc springs installed back to back between the upper blades. Is a web cutting method in which a belt-like web that runs continuously by being pressed against an outer lower blade is cut into a multi-strip web, the same location on the left and right sides of the disc spring and the inner peripheral portion of the upper blade By providing a notch and shifting the phase of the left and right Belleville springs and the upper blade cutout, the position regulating means in the axial direction of one of the Belleville springs can be changed between the other Belleville spring and the upper blade. It is characterized by being installed in the notch.

  According to the above-described configuration, the disc spring is pressed by the position regulating means, the upper blade is biased to the lower blade by the disc spring, and the position regulating means is formed by the disc spring arranged back to back and the notch formed in the upper blade. By accommodating the spacer, no spacer is required.

  According to another aspect of the present invention, preferably, an upper blade unit including two upper blades installed on the first shaft so that the blade edge is on the outer side, and two lower plates installed on the second shaft. A web cutting method for cutting a strip-shaped web continuously running by a lower blade unit including a blade into a multi-strip web, wherein the upper blade unit includes two upper blade holders each including an upper blade pressing portion, The upper blade is disposed so as to be in contact with the upper blade pressing portion of the upper blade holder, and a disc spring for applying a biasing force to the upper blade is fixed by a position restricting means attached to the upper blade holder. In a location different from the location, a notch is formed in the same location of each upper blade holder, each upper blade, and each disc spring, and the two upper blade holders are connected to the position of one upper blade holder. The regulating means is the notch of the other upper blade holder. Brought into close contact so as to be positioned in the space formed is cut by two lower blades arranged on the outer side of the upper blade of the two.

  According to another aspect of the present invention, preferably, the position restricting means is a screw.

  According to another aspect of the present invention, preferably, the web is a web having a photosensitive layer coated on a surface thereof.

  According to another aspect of the present invention, preferably, two sets of upper and lower blades for simultaneously cutting both ends of the web are further provided.

  According to another aspect of the present invention, there is provided a web cutting device for cutting a continuously running belt-like web into a multi-strip web, comprising at least a cutting mechanism installed within the width of the web, wherein the cutting mechanism , Two upper blades installed on the same axis so that the blade edge is on the outside, two lower blades arranged outside the two upper blades, and back-to-back between the two upper blades Two disc springs that press the upper blade against the outer lower blade, a pair of the disc springs, and a notch provided at the same location on the inner periphery of the upper blade, and the 2 A position restricting means in the axial direction attached to each of the disc springs, and the position restricting means of one of the disc springs by shifting the phase of the left and right disc springs and the notch of the upper blade Is installed in the other disc spring and the notch of the upper blade.

  According to another aspect of the present invention, the web cutting apparatus further includes two cutting mechanisms each including a set of an upper blade and a lower blade for cutting both ends in the width direction of the web.

  According to the web cutting method and the cutting apparatus of the present invention, when a plurality of products are cut from a wide width into a plurality of products, a waste portion provided between the products can be narrowed.

The schematic block diagram of the conventional cutting part. The schematic block diagram of the cutting part which concerns on this Embodiment. The exploded perspective view of an upper blade unit. The assembly drawing of a part of upper blade unit. The schematic block diagram of a cutting device.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will be described with reference to the following preferred embodiments, but can be modified in many ways without departing from the scope of the present invention, and other embodiments than the present embodiment can be utilized. be able to. Accordingly, all modifications within the scope of the present invention are included in the claims. In the present specification, a numerical range represented by using “to” means a range including numerical values described before and after “to”.

  FIG. 1 is a schematic view showing a conventional cutting method and a cutting apparatus, and FIG. 2 is a schematic view showing a cutting method and a cutting altar apparatus according to the present embodiment.

  As shown in FIG. 1, in the conventional hollow cutting, the upper blade unit 2 and the lower blade unit 3 are used. The upper blade unit 2 has two upper blade holders 4 and 5 and a spacer 6 inserted between the upper blade holders 4 and 5. The upper blade holders 4 and 5 are provided with upper blade holding portions 7 and 8, respectively. A disc spring 10 is disposed between the upper blade 9 and the spacer 6, and a disc spring 12 is disposed between the upper blade 11 and the spacer 6. The spacer 6 presses the disc springs 10 and 12. The upper blades 9 and 11 are urged to the upper blade pressing portions 7 and 8 by the disc springs 10 and 12. The lower blade unit 3 includes lower blades 13 and 14 that are spaced apart. The lower blades 13 and 14 are disposed outside the upper blades 9 and 11. The upper blade rotation shaft is inserted into the center hole 16 of the upper blade unit 2. Similarly, the lower blade rotating shaft is inserted into the center hole of the lower blade unit 3.

  By driving the rotary shaft for the upper blade and the rotary shaft for the lower blade, the pair of upper blades 9 and the lower blade 13 and the pair of upper blades 11 and the lower blade 14 rotate, respectively, and the continuously running web W is hollowed out. While cutting. The hollowed out portion is recovered as a waste product 15 and discarded.

  In the above-described cutting method, since the spacer 6 is inserted between the upper blade holders 4 and 5, the width L of the waste product 15 becomes long and the web W is wasted.

  2A shows a first state when the web W is cut, and FIG. 2B shows a second state different from the first state.

  In the hollow cutting of the present embodiment, an upper blade unit 22 and a lower blade unit 23 are configured. The upper blade unit 22 has two cylindrical upper blade holders 24 and 25. The upper blade holders 24 and 25 include upper blade pressing portions 27 and 28 formed along the circumference, respectively.

  As shown in FIG. 2A, a plurality of screws 40 are attached to the upper blade holder 24 along the circumferential direction of the upper blade holder 24, for example, every 60 ° central angle. A disc spring 30 is disposed between the plurality of screws 40 and the upper blade 30. A plurality of screws 40 pressurize and fix the disc spring 30. The upper blade 29 is urged to the upper blade pressing portion 27 by the disc spring 30.

  As shown in FIG. 2A, a plurality of notches 50 are formed in the upper blade holder 25 at positions corresponding to the plurality of screws 40. Similarly, a plurality of notches 52 and 54 are also formed in the upper blade 31 and the disc spring 32 at positions corresponding to the plurality of screws 40. As a result, the head of the screw 40 is accommodated in the space formed by the notches 50, 52 and 54.

  On the other hand, as shown in FIG. 2B, a plurality of screws 42 are attached to the upper blade holder 25 along the circumferential direction of the upper blade holder 25, for example, every 60 ° central angle. A disc spring 32 is disposed between the screw 42 and the upper blade 31. A screw 42 pressurizes and fixes the disc spring 32. The upper blade 31 is urged to the upper blade pressing portion 28 by the disc spring 32.

  As shown in FIG. 2B, a plurality of notches 60 are formed in the upper blade holder 24 at positions corresponding to the plurality of screws 42. Similarly, a plurality of notches 62 and 64 are formed in the upper blade 29 and the disc spring 30 at positions corresponding to the plurality of screws 42. Thereby, the head of the screw 42 is accommodated in the space formed by the notches 60, 62, 64.

  As described above, the upper blade holder 24 has a plurality of screws 40 and a plurality of notches 60 that are alternately arranged. Similarly, the upper blade holder 25 has a plurality of screws 42 and a plurality of notches 50 arranged alternately. When the upper blade holder 24 and the upper blade holder 25 are brought into close contact with each other, the screw 40 of the upper blade holder 24 and the notch 50 of the upper blade holder 25 are cut off between the screw 42 of the upper blade holder 25 and the upper blade holder 24. Positioning is made so that the notches 60 face each other, and the upper blade holder 24 and the upper blade holder 25 are brought into close contact. With this configuration, the upper blade unit 22 does not require a spacer between the upper blade holder 24 and the upper blade holder 25.

  In this embodiment, (1) the disc spring is pressurized with a screw, the upper blade is urged with the disc spring, and (2) the disc spring, the upper blade, and the upper blade holder are arranged with the screw heads back to back. By accommodating the formed notch, no spacer is required.

  The lower blade unit 23 includes lower blades 33 and 34 that are spaced apart. The lower blades 33 and 34 are disposed outside the upper blades 29 and 31. The upper blade rotation shaft is inserted into the center hole 36 of the upper blade unit 22. Similarly, the lower blade rotating shaft is inserted into the center hole of the lower blade unit 23.

  By driving the rotary shaft for the upper blade and the rotary shaft for the lower blade, the pair of upper blades 29 and the lower blade 33 and the pair of upper blades 31 and the lower blade 34 rotate, respectively, and the continuously running web W is hollowed out. While cutting. The hollowed out portion is recovered as a waste product 15 and discarded.

  In the cutting device 21 described above, since no spacer is inserted between the upper blade holders 24 and 25, the width L1 of the waste product 15 can be made shorter than the conventional width L. The loss of the web W can be reduced.

  FIG. 3 is an exploded perspective view of the upper blade unit. FIG. 3A is an exploded perspective view of the upper blade holder 24, the upper blade 29, and the disc spring 30. A plurality of screws 40 are positioned so that the positions of the notch 60 of the upper blade holder 24, the notch 62 of the upper blade 29, and the notch 64 of the disc spring 30 coincide with each other. It is attached at a position where it is not formed. Six screws 40 pressurize and fix the disc spring 30. FIG. 3B is an exploded perspective view of the upper blade holder 25, the upper blade 31, and the disc spring 32. A plurality of screws 42, which are positioned so that the positions of the notch 50 of the upper blade holder 25, the notch 52 of the upper blade 31, and the notch 54 of the disc spring 32, match the notch 50 of the upper blade holder 25. It is attached at a position where it is not formed. Six screws 42 pressurize and fix the disc spring 32. As shown in FIG. 3, when the upper blade holder 24 side and the upper blade holder 25 side are compared, the positions of the screw 40 of the upper blade holder 24 and the screw 42 of the upper blade holder 25 are shifted by a predetermined phase. The screws 40 and 42 do not interfere with each other, and the screws 40 and 42 are accommodated in a space constituted by the notches 60, 62, and 64 and a space constituted by the notches 50, 52, and 44, respectively.

  FIG. 4 shows the upper blade holder 25, the upper blade 31, and the disc spring 32 after assembly. The disc spring 32 is fixed to the upper blade holder 25 by the screw 42. A space for accommodating the screw head of the other upper blade holder is formed by the notches 50, 52, and 54.

  When the product having the photosensitive layer coated on the web W is, for example, a PS plate, as the web, dimensionally stable aluminum or an alloy thereof (for example, silicon, copper, manganese, magnesium, chromium, zinc, lead, Bismuth, nickel alloy) can be used. Usually, conventionally known materials described in the 4th edition of Aluminum Handbook (1990, published by Light Metal Association), for example, JIS A 1050 material, JIS A 11 00 material, JIS A 3103 material, JIS A 3004 material, JIS A 3005 material or For the purpose of increasing the tensile strength, an alloy in which 0.1 wt% or more of magnesium is added to these is used.

  When the web W is an aluminum plate, it is usual that the surface treatment section performs various treatments according to the purpose. As a general treatment method, an aluminum plate is first cleaned by degreasing or electrolytic polishing and desmut treatment. Thereafter, a mechanical surface roughening treatment and / or an electrochemical surface roughening treatment is performed to give fine irregularities on the surface of the aluminum plate. At this time, a chemical etching process and a desmut process may be further added. Thereafter, an anodizing treatment is performed to increase wear resistance of the aluminum plate surface, and then the aluminum surface is subjected to a hydrophilic treatment and / or a sealing treatment as necessary. However, the support is not limited to these and may be a composite material of metal and resin.

  A photosensitive layer forming solution is applied to the continuously running web W by a coating device to form a lower layer. The coating apparatus is not particularly limited as a coating apparatus, and a coating apparatus to which a method using a coating rod, a method using an extrusion coater, a method using a slide bead coater, or the like can be used.

Examples of the photosensitive layer forming solution for constituting the photosensitive layer of the lithographic printing plate include those that constitute the photosensitive layers of the following aspects (1) to (11).
(1) A mode in which the photosensitive layer contains an infrared absorber, a compound that generates an acid by heat, and a compound that crosslinks by an acid.
(2) An embodiment in which the photosensitive layer contains an infrared absorber and a compound that becomes alkali-soluble by heat.
(3) An embodiment in which the photosensitive layer includes two layers, a layer containing a compound that generates radicals upon irradiation with laser light, an alkali-soluble binder, and a polyfunctional monomer or prepolymer, and an oxygen blocking layer.
(4) A mode in which the photosensitive layer is composed of two layers of a physical development nucleus layer and a silver halide emulsion layer.
(5) A mode in which the photosensitive layer includes three layers of a polymerization layer containing a polyfunctional monomer and a polyfunctional binder, a layer containing silver halide and a reducing agent, and an oxygen blocking layer.
(6) A mode in which the photosensitive layer includes two layers of a layer containing a novolak resin and naphthoquinone diazide and a layer containing a silver halide.
(7) A mode in which the photosensitive layer contains an organic photoconductor.
(8) A mode in which the photosensitive layer includes 2 to 3 layers composed of a laser light absorbing layer removed by laser light irradiation, and a lipophilic layer and / or a hydrophilic layer.
(9) A compound in which the photosensitive layer absorbs energy to generate an acid, a polymer compound having a functional group that generates sulfonic acid or carboxylic acid by an acid in the side chain, and an acid generator by absorbing visible light The aspect containing the compound which gives energy to.
(10) A mode in which the photosensitive layer contains a quinonediazide compound and a novolac resin.
(11) A mode in which the photosensitive layer contains a compound that decomposes by light or ultraviolet rays to form a crosslinked structure with itself or other molecules in the layer and an alkali-soluble binder. However, the coating apparatus and the coating liquid are not limited to these.

  When a web coated with such a photosensitive layer is cut, “fogging” tends to occur at a portion in contact with the upper blade. Therefore, when performing multi-cutting from a wide web into a plurality of products, the cutting method of the present embodiment can be suitably used.

  Next, a slitter apparatus for creating a PS plate will be briefly described with reference to FIG. In the slitter device 100, a pair of upper blades 112 and lower blades 116 are installed at both ends in the width direction of the PS plate material in order to cut the ears of the web W. An upper blade unit 22 having two upper blades 29 and 31 and a lower blade unit 23 having two lower blades 33 and 34 are installed at a substantially central portion of the slitter device 100. The pair of upper blades 112 and lower blades 116 and the pair of upper blade units 22 and the lower blade unit 23 cut the PS plate material into two PS plates W1 and W2 while being hollowed out.

  The upper blades 112 and 112 and the lower blades 116 and 116 installed at both ends are supported by the column 124. The column 124 is supported on a rail 128 installed on the base 126. The column 124 is slidable along the rail 128 in the width direction of the PS plates W1 and W2. Accordingly, the column 124 is slid in accordance with the sizes of the PS plates W1 and W2.

  In order not to generate burrs on the surface (in this case, the upper side) on which the photosensitive layers of the PS plates W1 and W2 are formed, the upper blades 112 and 112 are arranged outside the position where the lower blades 116 and 116 receive the product surface. . In addition, the upper blade 29 and the upper blade 31 are installed in opposite directions in order to perform hollowing in the central portion. The lower blade 33 is installed to support the end of the PS plate W1, and the lower blade 34 is installed to support the end of the PS plate W2.

  In the present embodiment, since the upper blade unit 22 and the lower blade unit 23 not provided with the spacer are provided, the width of the waste product can be reduced.

  22 ... Upper blade unit, 23 ... Lower blade unit, 24, 25 ... Upper blade holder, 27, 28 ... Upper blade pressing part, 29, 31 ... Upper blade, 30, 32 ... Disc spring, 33, 34 ... Lower blade, 40, 42 ... screw, 50, 52, 54, 60, 62, 64 ... notch

Claims (7)

Two upper blades are installed on the same axis so that the cutting edge is on the outside, and the upper blade is pressed against the outer lower blade by the elastic force of two disc springs installed back to back between the upper blades. A web cutting method for cutting a strip-shaped web continuously running into a multi-strip web,
One disc spring is provided by providing notches at the same location on the inner peripheral portion of the pair of disc springs and the upper blade on both the left and right sides, and by shifting the phases of the notches of the left and right disc springs and the upper blade. A method for cutting a web, in which position restricting means in the axial direction is installed in the other disc spring and the notch of the upper blade. A belt-shaped belt continuously running by an upper blade unit having two upper blades installed on the first shaft and a lower blade unit having two lower blades installed on the second shaft so that the blade edge is outside. A web cutting method for cutting a web into multiple webs,
The upper blade unit includes two upper blade holders each having an upper blade pressing portion, and the upper blade is disposed so as to be in contact with the upper blade pressing portion of each upper blade holder, and applies a biasing force to the upper blade. A spring is fixed by position restricting means attached to the upper blade holder,
In a location different from the location of the position regulating means, a notch is formed in the same location of each upper blade holder, each upper blade, each disc spring,
Two upper blade holders are brought into close contact so that the position restricting means of one upper blade holder is located in a space formed by the notches of the other upper blade holder,
A method of cutting a web by cutting with two lower blades arranged outside the two upper blades.   The web cutting method according to claim 1 or 2, wherein the position regulating means is a screw.   4. The web cutting method according to claim 1, wherein the web is a web having a photosensitive layer coated on a surface thereof.   5. The web cutting method according to claim 1, further comprising two sets of an upper blade and a lower blade for simultaneously cutting both end portions of the web. 6. A web cutting device that cuts a continuously running belt-like web into multiple webs,
A cutting mechanism installed at least within the width of the web;
The cutting mechanism is
Two upper blades installed on the same axis so that the blade edge is on the outside,
Two lower blades arranged outside the two upper blades;
Two disc springs installed back to back between the two upper blades and pressing the upper blade against the outer lower blade;
A pair of disc springs and a notch provided at the same location on the inner periphery of the upper blade,
A position restricting means in the axial direction attached to each of the two disc springs,
By shifting the phase of the left and right disc springs and the notch of the upper blade, the position regulating means of one of the disc springs is installed in the notch of the other disc spring and the upper blade, Web cutting device.   The web cutting apparatus according to claim 6, further comprising two cutting mechanisms each having a set of an upper blade and a lower blade for cutting both ends of the web in the width direction.

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