JP2007237324A - Device and method for cutting web - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for cutting a web capable of cutting a product having a good cut section quality out of the web. <P>SOLUTION: A lower blade 6 is disposed on the side of a bottom 3 in the web 2, meanwhile, an upper blade 4 is spaced out in the arrow B direction by a predetermined clearance C from the lower blade 6 and on the side of an upper surface in the web 2. In this case, the blade tip angle ϕ1 of a blade tip 4a in the upper blade 4 and the blade tip angle ϕ2 of a blade tip 6a in the lower blade 6 are each set at 90 [°] or less. In addition, the inclination angle θ of the bottom 3 in the web 2 to the blade tip 6a is set at 5 [°] to 25[°], more preferably, it is set at 10 [°] to 20 [°]. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a web cutting device and a web cutting method for cutting a web using a first cutting blade arranged on one side of a web and a second cutting blade arranged on the other side, and more specifically The present invention relates to a web cutting apparatus and a web cutting method suitable for cutting a multilayer web.

  Conventionally, the first and second cutting edges are brought into contact with both sides of a web formed by laminating films having different physical properties such as mechanical properties, for example, a film in which a photosensitive material is applied to a support. When the web is cut, before the initial crack due to shearing occurs in the vicinity of the first and second cutting edges in the web, the layers are separated from each other based on the difference in physical properties, or the initial Another crack is generated at a location different from the location where the crack is generated, and as a result, the product generated by cutting the web into a predetermined length is free of debris generated due to the peeling or the other crack. There is concern about the problem of adhesion. The above-described peeling between layers and other cracks are caused by the deformation of the web that occurs when the web is cut, that is, the occurrence of sagging due to a bending moment.

  FIG. 6 is a side view for explaining the occurrence of the sagging, and shows a state in which the lower blade 6 is in contact with the bottom surface 3 of the web 2 and is separated from the cutting edge 6a of the lower blade 6 by a predetermined clearance C. When the blade 4 is lowered to the upper surface 5 of the web 2, the web 2 receives a compressive stress Ps from the upper blade 4 and the lower blade 6.

  At this time, in the vicinity of the cutting edges 4a and 6a in the web 2, a horizontal component force Pl is generated in the direction along the top surface 5 and the bottom surface 3 against the bending moment caused by each compression stress Ps. The web 2 receives tensile stress due to the horizontal component force Pl simultaneously with each of the compressive stresses Ps. Therefore, sagging 7 caused by the biting of the upper blade 4 and the lower blade 6 into the web 2 occurs in the vicinity of the blade edges 4a, 6a in the web 2.

  When the upper blade 4 is further lowered in such a state, the compressive stress Ps and the horizontal component force Pl described above further increase, and the concentrated stress (shear load) in the vicinity of the blade edges 4a and 6a in the web 2 is a predetermined value. If the upper edge 4 is further lowered, the cracks 9 are connected and the web 2 is cut.

  In order to avoid the occurrence of such sagging 7, in the technique disclosed in Patent Document 1, the cutting edge 6a of the lower blade 6 is notched in advance by 3 [°] to 10 [°], and the notched cutting edge is used. The web 2 is cut in a state where the web 2 is carried in along 6a.

JP 2004-58180 A

  However, in the technique of Patent Document 1 described above, the cutting edge angle of the cutting edge 6a becomes an obtuse angle exceeding 90 [°], so that the cutting of the cutting edge 6a with respect to the web 2 is deteriorated. As a result, the cut surface quality of the web 2 is deteriorated. There is a problem that decreases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a web cutting device and a web cutting method capable of cutting a product having good cut surface quality from a web.

  The present invention includes a first cutting edge disposed on one side of a web, and a second cutting edge spaced from the first cutting edge by a predetermined clearance in the web conveyance direction and disposed on the other side of the web. A web cutting machine that cuts the web by bringing the blade edge of the first cutting blade into contact with one surface side of the web and bringing the blade edge of the second cutting blade into contact with the other surface side of the web. In the apparatus, the cutting edge angle of each cutting edge is 90 [°] or less, and when cutting the web, the cutting edge has an inclination angle of 5 [°] to 25 [°] with respect to the cutting edge of the first cutting edge. The web is carried between the cutting edge of the first cutting edge and the cutting edge of the second cutting edge.

  Further, according to the present invention, the first cutting edge is disposed on one side of the web, and the second cutting edge is separated from the first cutting edge by a predetermined clearance in the web conveyance direction on the other side of the web. In the web cutting method, wherein the cutting of the web is performed by placing the blade edge of the first cutting blade in contact with one surface side of the web and the blade edge of the second cutting blade in contact with the other surface side of the web, The cutting edge angle of each cutting edge is set to 90 [°] or less, and when cutting the web, the web is cut at an inclination angle of 5 [°] to 25 [°] with respect to the cutting edge of the first cutting blade. It is carried in between the blade edge of a cutting blade and the blade edge of the said 2nd cutting blade.

  According to each configuration described above, when the cutting edges of the first and second cutting edges come into contact with the surfaces of the web, the cutting edges become wedges with respect to the surfaces of the web. An initial crack can be easily generated in the vicinity of each cutting edge. Thereby, since it becomes possible to cut | disconnect the said web, without generating a bending moment, the product with favorable cut surface quality can be cut out from the said web.

  Further, when each blade edge comes into contact with each surface of the web, an initial crack is generated in the vicinity of each blade edge in the web. Therefore, even if the web has a multilayer structure in which films having different physical properties are laminated. The occurrence of delamination during cutting and the generation of cracks other than the initial crack can be prevented. Therefore, according to the present invention, compared with the prior art, it is possible to realize both improvement of the cut surface quality of the product and prevention of generation of debris due to the delamination and other cracks.

  Here, when the inclination angle is 10 [°] to 20 [°], a product with better cut surface quality can be cut out from the web.

  In addition, when the web is cut by disposing a support member that supports the one surface of the web upstream of the first cutting blade in the transport direction, the one surface of the web is the first cutting blade. This is supported at two locations of the blade edge and the support member. Thereby, since the said web can be cut | disconnected in the state which maintained the said inclination angle reliably, it becomes possible to further improve the cut surface quality of the said product.

  In this case, the contact portion of the support member with one surface of the web is formed in an arc shape, or the one surface of the web is not damaged by chamfering along the one surface of the web. Can be supported.

  Furthermore, it is preferable that the support member is arranged so as to overlap the first cutting edge or is configured integrally with the first cutting edge.

  According to the present invention, the web can be cut without generating a bending moment, so that a product with good cut surface quality can be cut out from the web.

  The web cutting device according to the present invention will be described in detail below with reference to the accompanying drawings by giving preferred embodiments in relation to the web cutting method.

  FIG. 1 is a cross-sectional view showing the cutting of the web 2 by the upper blade (second cutting blade) 4 and the lower blade (first cutting blade) 6 in the present embodiment, and FIG. It is sectional drawing which shows the case where the supporting member 8 is arrange | positioned in the upstream of the conveyance direction (arrow B direction) of No.2. FIG. 3A is a cross-sectional view showing a case where a contact portion (tip portion) 8a of the support member 8 with the bottom surface 3 of the web 2 is formed in an arc shape, and FIG. 3B shows the tip portion 8a at the bottom surface of the web 2. 3 is a cross-sectional view showing a case where chamfering is performed along line 3;

  In FIG. 1 to FIG. 3B, the same components as those in FIG. 6 will be described with the same reference numerals.

  In FIG. 1, a web 2 is a multilayer structure web such as a photosensitive film in which a coating film 2a made of a photosensitive material is formed on a support 2b, and is conveyed at a predetermined speed along the arrow B direction.

  The lower blade 6 is disposed on the bottom surface (one surface) 3 (surface of the support 2b) side of the web 2, while the upper blade 4 is separated from the lower blade 6 in the direction of arrow B by a predetermined clearance C and The web 2 is disposed on the upper surface (other surface) 5 (surface of the coating film 2a) side.

  The upper blade 4 and the lower blade 6 are made of, for example, ceramics, cemented carbide, ultra-high speed tool steel (so-called high-speed steel) or die steel, the blade edge angle φ1 of the blade edge 4a of the upper blade 4 and the lower blade 6 The blade edge angle φ2 of each of the blade edges 6a is set to 90 ° or less. FIG. 1 shows a case where φ1 = φ2 = 90 [°].

  In this case, the clearance C is, for example, preferably 1 [%] to 30 [%], more preferably 2.5 [%] to 20 [%] with respect to the thickness of the web 2.

  Further, when the web 2 is cut, the inclination angle θ of the bottom surface 3 of the web 2 with respect to the cutting edge 6a of the lower blade 6 is 5 [°] to 25 [°], more preferably 10 [°] to 20 [°. ] Is set. The inclination angle of the upper surface 5 of the web 2 with respect to the cutting edge 4a of the upper blade 4 is also set to the aforementioned inclination angle θ.

  Here, in a state where the web 2 is carried in between the cutting edge 4a of the upper blade 4 and the cutting edge 6a of the lower blade 6 along the arrow B direction by a conveyance mechanism (not shown), the lower blade 6 is raised and the cutting edge is moved. 6 a is brought into contact with the bottom surface 3 of the web 2, while the upper blade 4 is lowered to the web 2 at substantially the same speed as the lower blade 6, and the blade edge 4 a is brought into contact with the upper surface 5 of the web 2. Then, the bottom surface 3 side of the web 2 receives the compressive stress Ps from the cutting edge 6a, while the top surface 5 side of the web 2 receives the compressive stress Ps from the cutting edge 4a. 4a and 6a serve as wedges for the bottom surface 3 side and the top surface 5 side of the web 2. In this case, when the shear strength of the coating film 2a is lower than the shear strength of the support 2b, the vicinity of the blade edge 4a in the coating film 2a is locally cut to form the initial crack 9.

  When the upper blade 4 is further lowered and the lower blade 6 is further raised, cracks (not shown) are formed in the vicinity of the blade edges 4a and 6a of the support 2b, and these cracks are connected to each other so that the web 2 has a predetermined length. It will be severed.

  The web 2 is cut in a stopped state after being carried in between the blade edges 4a and 6a, or is cut in a state where the web 2 is continuously conveyed at a predetermined speed in the arrow B direction. When the web 2 is cut in a stopped state, a product cut into a predetermined length is cut out from the web 2. On the other hand, when the web 2 is cut while being continuously conveyed at a predetermined speed in the direction of arrow B, the web 2 is moved while moving the upper blade 4 and the lower blade 6 corresponding to the predetermined speed. Cut to a predetermined length.

  Here, when the inclination angle θ is less than 5 [°], at the time of cutting, the blade edges 4a and 6a do not become wedges with respect to the web 2 described above, and similarly to FIG. The sagging 7 is formed in the vicinity of 6a, and there is a possibility that local peeling between the coating film 2a and the support 2b or other cracks different from the initial crack 9 may occur. On the other hand, when the inclination angle θ exceeds 25 [°], when the upper blade 4 is lowered to the upper surface 5 of the web 2, the coating film 2a extends along the arrow B direction (see FIG. 1) from the support 2b. There is a risk of peeling.

  In the present embodiment, as shown in FIG. 2, it is preferable to dispose a support member 8 that supports the bottom surface 3 of the web 2 on the upstream side in the direction opposite to the arrow B direction with respect to the cutting edge 6 a of the lower blade 6. It is.

  The support member 8 is a member having a substantially rectangular cross section made of metal or nonmetal, and is disposed on the upper surface of the lower blade 6. The angle formed by the tip 8a of the support member 8 that supports the bottom surface 3 of the web 2 and the bottom surface 3 is set to be substantially the same as the inclination angle θ. As a result, the bottom surface 3 of the web 2 is supported at two locations, that is, the tip portion 8a of the support member 8 and the cutting edge 6a of the lower blade 6. Therefore, when the web 2 is cut, the inclined surface is inclined. The angle θ can be reliably maintained in the range of 5 [°] to 25 [°].

  3A, it is also preferable to form the tip 8a in an arc shape, or to chamfer the tip 8a along the bottom surface 3 of the web 2 as shown in FIG. 3B. Thereby, the web 2 can be supported without damaging the bottom surface 3. In FIG. 2 to FIG. 3B, the lower blade 6 and the support member 8 are separated from each other. However, the support member 8 can be integrally configured as a part of the lower blade 6.

  4 and 5 are side views of the web cutting device 10 according to this embodiment including the upper blade 4, the lower blade 6, and the support member 8 described above.

  The web cutting device 10 has a lower blade holder 16 that is guided by a guide rail 14 and is movable in the conveyance direction (arrow B direction) of the web 2 and in the opposite direction. A lower blade 6 and a support member 8 are fixed to the upper portion of the lower blade holder 16 via a support 18.

  In this case, the lower blade 6 and the support member 8 are in the direction of the arrow B so that the bottom surface 3 of the web 2 is inclined at an inclination angle θ (see FIGS. 1 and 2) with respect to the lower blade 6 and the support member 8. It is fixed in a state inclined by an inclination angle θ. In addition, on the upstream side and the downstream side of the lower blade holder 16, conveyors 19a and 19b that convey the web 2 are disposed.

  The lower blade holder 16 is provided with guide bars 20a and 20b extending vertically upward (a direction orthogonal to the arrow B direction), and moves in the vertical direction with respect to the guide bars 20a and 20b. The upper blade holder 22 is held in a free state. The upper blade 4 is fixed to the lower portion of the upper blade holder 22 via a support 24. In this case, like the lower blade 6 and the support member 8, the upper blade 4 is fixed in a state of being inclined by an inclination angle θ (see FIGS. 1 and 2) with respect to the arrow B direction.

  An upper end portion of the first link member 26 is pivotally supported at a substantially central portion of the upper blade holder 22, and an end portion of the second link member 28 is pivotally supported at the lower end portion of the first link member 26. A rotating shaft 32 of a rotary drive source 30 such as a motor is pivotally supported on the other end of the second link member 28.

  In the web cutting device 10, as shown in FIG. 4, in a state where the web 2 conveyed in the direction of arrow B is continuously carried at a predetermined speed between the upper blade 4 and the lower blade 6, the rotational drive source 30 is driven, and the end of the second link member 28 at the top dead center starts a constant velocity circular motion in the direction of arrow A around the rotation shaft 32, and the lower end of the second link member 28 is pivotally supported by the second link member 28. The first link member 26 is lowered while moving in the direction opposite to the conveyance direction B of the web 2.

  At this time, the upper blade holder 22 pivotally supported on the upper end portion of the first link member 26 descends in the direction of the arrow C1 along the guide bars 20a and 20b and is connected to the guide bars 20a and 20b. The holder 16 moves in the direction (upstream side) opposite to the conveyance direction B of the web 2 under the guide action of the guide rail 14.

  Next, when the rotation angle of the second link member 28 rotating in the direction of arrow A exceeds 90 ° from the top dead center (the position of the second link member 28 shown in FIG. 4), the lower blade holder 16 is moved to the guide rail 14. The movement starts in the direction of arrow B under the guiding action. Thereafter, within a predetermined range between the rotation angle 90 [°] of the second link member 28 and the rotation angle 180 [°] (see FIG. 5) which is the bottom dead center of the second link member 28, the arrow C1 The web 2 is cut by the upper blade 4 fixed to the upper blade holder 22 descending in the direction and the lower blade 6 fixed to the lower blade holder 16.

  At this time, since the lower blade 6 and the upper blade 4 are moved in the arrow B direction together with the lower blade holder 16 and the upper blade holder 22, the cutting process is performed while the web 2 is conveyed in the arrow B direction at a constant speed. Is called.

  After the web 2 is cut, when the end of the second link member 28 further rotates in the direction of arrow A from the bottom dead center (the position of the second link member 28 shown in FIG. 5), the upper blade holder 22 moves in the direction of arrow C2. Next, when the rotation angle of the end portion of the second link member 28 exceeds 90 ° from the bottom dead center, the lower blade holder 16 is moved again in the direction opposite to the arrow B direction (upstream side). It moves and returns to the state of FIG.

  4 and 5, the web 2 is cut into a predetermined length by moving the upper blade 4 and the lower blade 6 while carrying the web 2 into the web cutting device 10 in the arrow B direction at a predetermined speed. However, instead of this configuration, the upper blade 4 and the lower blade 6 are moved in the vertical direction while the web 2 is stopped between the upper blade 4 and the lower blade 6. It is also possible to cut the web 2 into a predetermined length.

  As described above, according to the present embodiment, the blade edge angle φ1 of the blade edge 4a of the upper blade 4 and the blade edge angle φ2 of the blade edge 6a of the lower blade 6 are each set to 90 ° or less, and the blade edges 4a and 6a are respectively set to 90 °. On the other hand, when the web 2 is inclined at an inclination angle θ of 5 [°] to 25 [°], when the blade edge 4a and the blade edge 6a abut against the bottom surface 3 and the upper surface 5 of the web 2, The cutting edges 4a and 6a serve as wedges for the surfaces 3 and 5 of the web 2, and the initial crack 9 can be easily generated in the vicinity of the cutting edges 4a and 6a in the web 2. As a result, the web 2 can be cut without generating a bending moment, and thus a product with good cut surface quality can be cut out from the web 2.

  In addition, when the cutting edges 4a and 6a come into contact with the surfaces 3 and 5 of the web 2, an initial crack 9 is generated in the vicinity of the cutting edges 4a and 6a in the web 2, so that the web 2 is mechanical. Even in the case of the multilayered web 2 in which the coating film 2a and the support 2b having different characteristics are laminated, it is possible to prevent the occurrence of delamination during cutting and the generation of cracks other than the initial crack 9. Therefore, according to the present embodiment, it is possible to realize both improvement of the cut surface quality of the product and prevention of generation of debris due to the delamination and other cracks as compared with the prior art. .

  Furthermore, when the inclination angle θ is set to 10 [°] to 20 [°], a product with better cut surface quality can be cut out from the web 2.

  Furthermore, by disposing the support member 8 on the upstream side of the lower blade 6, when the web 2 is cut, the bottom surface 3 of the web 2 is formed between the cutting edge 6 a of the lower blade 6 and the tip 8 a of the support member 8. It will be supported in two places. Thereby, since the said web 2 can be cut | disconnected in the state which maintained inclination | tilt angle (theta) reliably, it becomes possible to further improve the cut surface quality of the said product.

  In this case, the web 2 can be supported without damaging the bottom surface 3 of the web 2 by forming the tip 8 a of the support member 8 in an arc shape or chamfering along the bottom surface 3 of the web 2. .

  Of course, the web cutting device and the web cutting method according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

It is sectional drawing which shows the cutting | disconnection of the web by an upper blade and a lower blade. It is sectional drawing which shows the case where a supporting member is arrange | positioned to the upstream of a lower blade. 3A is a cross-sectional view showing a case where the tip of the support member of FIG. 2 is formed in an arc shape, and FIG. 3B is a cross-sectional view showing a case where the tip of the support member of FIG. 2 is chamfered along the web. It is. It is a side view of a web cutting device provided with the upper blade of FIG.1 and FIG.2, a lower blade, and a supporting member. It is a side view which shows the cutting | disconnection of the web by the web cutting device of FIG. It is a side view which shows the sagging which generate | occur | produces when cut | disconnecting a web with an upper blade and a lower blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Web 2a ... Coating film 2b ... Support body 3 ... Bottom surface 4 ... Upper blade 4a, 6a ... Cutting edge 5 ... Upper surface 6 ... Lower blade 8 ... Support member 8a ... Tip part 9 ... Initial crack 10 ... Web cutting device

Claims (6)

A first cutting edge disposed on one side of the web; and a second cutting edge spaced from the first cutting edge by a predetermined clearance in the web conveyance direction and disposed on the other side of the web. In the web cutting device for cutting the web by bringing the blade edge of the first cutting blade into contact with one surface side of the web and bringing the blade edge of the second cutting blade into contact with the other surface side of the web,
The cutting edge angle of each cutting edge is 90 [°] or less,
When the web is cut, the web is cut at an inclination angle of 5 [°] to 25 [°] with respect to the cutting edge of the first cutting edge, and the cutting edge of the first cutting edge and the cutting edge of the second cutting edge. A web cutting device characterized by being carried in between. The web cutting device according to claim 1, wherein
The inclination angle is 10 [°] to 20 [°]. In the web cutting device according to claim 1 or 2,
A web cutting device, wherein a support member that supports one surface of the web is disposed upstream of the first cutting edge in the transport direction. The web cutting device according to claim 3, wherein
The contact part with the one surface of the said web in the said support member is formed in circular arc shape, or is chamfered along the one surface of the said web. The web cutting device characterized by the above-mentioned. The web cutting device according to claim 3 or 4,
The web cutting device, wherein the support member is arranged so as to overlap the first cutting blade or is configured integrally with the first cutting blade. A first cutting edge is disposed on one surface side of the web, a second cutting edge is disposed on the other surface side of the web with a predetermined clearance from the first cutting edge in the web conveyance direction, In the web cutting method of cutting the web by bringing the blade edge of the cutting blade into contact with one surface side of the web and bringing the blade edge of the second cutting blade into contact with the other surface side of the web,
The cutting edge angle of each cutting edge is 90 [°] or less,
When the web is cut, the web is cut at an inclination angle of 5 [°] to 25 [°] with respect to the cutting edge of the first cutting edge, and the cutting edge of the first cutting edge and the cutting edge of the second cutting edge. A web cutting method characterized by being carried in between.

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