Device and method for producing workpiece

Abstract

To inhibit curving of an edge of a workpiece in a process in which a web is punched to produce the workpiece.SOLUTION: In a method for producing a workpiece B, a web A1 having an elongated belt-like shape is transported and passes through a space between a die roll 6 and an anvil roll 7 of a rotary die cutter 2 having the die roll 6 and the anvil roll 7 to form a cut line C defining a profile of the workpiece B in the web A1. The web A1 is displaced to the anvil roll 7 side and transported at an outlet side of the rotary die cutter 2.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a method and an apparatus for forming score lines in a web and producing a workpiece from the web. [Background technology]

[0002] Conventionally, a long strip-shaped web is passed between the die roll and anvil roll of a rotary die cutter to form cut lines in the web, and the area surrounded by the cut lines is separated from the web to obtain a workpiece (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-202768 A Summary of the Invention

[0004] However, when a workpiece is manufactured using a rotary die cutter, the edges of the workpiece may be curved. [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a method and an apparatus therefor that are capable of obtaining a workpiece with reduced edge curvature. [Means for solving the problem]

[0006] The present inventors have studied the cause of the above-mentioned curvature. Specifically, the present inventors have focused on the phenomenon that the above-mentioned curvature is likely to occur at the edge of the workpiece on the rear side in the web transport direction. As shown in FIG. 10, the web 100 is transported in a direction perpendicular to a line connecting the center of the rotation axis of the die roll 600 and the center of the rotation axis of the anvil roll 700. The die roll 600 rotates in synchronization with the transport of the web 100, and the cutting edge of the cutting edge of the cutting edge located on the front side in the web transport direction of the web enters the web first, and the cutting edge located on the rear side in the web transport direction enters the web last and then leaves the web. Since the cutting edge 630 protrudes from the outer circumferential surface of the die roll, the peripheral speed of the cutting edge 6310 of the cutting edge 630 is faster than the peripheral speed of the cutting edge base of the cutting edge 630. 11, when the cutting edge 6310 of the blade portion 630 on the rear side in the transport direction of the web 100 leaves the web 100, the cutting edge 6310 flips up the edge W1 of the workpiece W. As a result, the workpiece W is curved, and further, it has been found that wrinkles are generated near the edge W1 of the workpiece W. The present inventors have solved the above problem by clarifying the cause.

[0007] A first embodiment of the present invention is a method for manufacturing a workpiece, which comprises transporting a long strip-shaped web and passing the web between a die roll and an anvil roll of a rotary die cutter, the die roll and anvil roll being used to form cut lines in the web that define the contour of the workpiece, and displacing the web toward the anvil roll at the exit side of the rotary die cutter. A second embodiment of the method for manufacturing a workpiece comprises transporting a long strip-shaped web and passing the web between a die roll and an anvil roll of a rotary die cutter having a die roll and an anvil roll, thereby forming cut lines in the web that define the contour of the workpiece, and transporting the web along the outer peripheral surface of the anvil roll at the exit side of the rotary die cutter.

[0008] A third aspect of the present invention relates to a method for producing a workpiece, which is the same as the first or second aspect, and further relates to transporting the web at the exit side of the rotary die cutter without separating the workpiece from the web. A fourth embodiment of the method for manufacturing a workpiece is a manufacturing method according to any one of the first to third embodiments, wherein the web has a support film and a processed film laminated on the support film, and the die roll forms the cut line in the processed film without completely cutting into the support film. A fifth embodiment of the method for manufacturing a workpiece is a method for manufacturing a workpiece according to any one of the first to fourth embodiments, in which, at the entry side of the rotary die cutter, the web is transported in a direction perpendicular to a line connecting the center of the rotation axis of the die roll and the center of the rotation axis of the anvil roll, and passed between the die roll and the anvil roll.

[0009] According to another aspect of the present invention, there is provided an apparatus for manufacturing a workpiece. The workpiece manufacturing apparatus of the first embodiment has a rotary die cutter having a die roll and an anvil roll, and a transport section that transports a long, strip-shaped web from the entrance side to the exit side of the die roll, and forms a cut line that defines the contour of the workpiece by passing the web between the die roll and the anvil roll by the transport section, and the transport section has a guide roll that displaces the transport path of the web toward the anvil roll at the exit side of the rotary die cutter. A workpiece manufacturing apparatus according to a second aspect is the manufacturing apparatus of the first aspect, wherein the transport section transports the web without separating the workpiece from the web at the exit side of the rotary die cutter. Effect of the Invention

[0010] By manufacturing a workpiece using the above-described workpiece manufacturing method and manufacturing apparatus, it is possible to prevent curvatures and wrinkles from occurring on the edges of the workpiece. [Brief description of the drawings]

[0011] [Figure 1] FIG. [Diagram 2] FIG. 2 is a schematic side view showing a layer configuration of a web according to one example. [Diagram 3] FIG. 11 is a schematic side view showing a layer structure of a web according to another example. [Figure 4] FIG. 2 is a schematic side view of a manufacturing apparatus for manufacturing a workpiece from a web. [Diagram 5] FIG. 2 is an enlarged plan view of the manufacturing apparatus as viewed from above the rotary die cutter. [Figure 6] An enlarged cross-sectional view taken along line VI-VI in Figure 5. [Figure 7] FIG. 7 is an enlarged cross-sectional view of a main portion of FIG. 6. [Figure 8] FIG. 13 is an enlarged plan view of a manufacturing apparatus according to a modified example, viewed from above a rotary die cutter. [Figure 9] FIG. 9 is an enlarged cross-sectional view taken along line IX-IX in FIG. 8. [Figure 10] FIG. 13 is a reference side view for explaining the cause of curvature occurring at the edge of a workpiece. [Figure 11] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [web] The web A1 has flexibility. In terms of shape, the web A1 is in the form of a long strip, as shown in FIG. 1. The long strip refers to a generally rectangular shape in plan view, in which the longitudinal length is sufficiently longer than the width direction. The longitudinal length of the web A1 is, for example, 5 m or more, and preferably, the longitudinal length is 10 m or more. The width direction is a direction perpendicular to the longitudinal direction. The web A1 is transported in the longitudinal direction.

[0013] In terms of layer structure, the web A1 has a support film A2 and a processed film A3 laminated on the support film A2, as shown in Fig. 2. The processed film A3 is a film on which a cut line is to be formed. The area of ​​the processed film A3 surrounded by the cut line is finally separated as the work. The support film A2 is a film that supports the area surrounded by the cut line (the work) after the cut line is formed in the processed film A3 so that it is not inadvertently separated. The processing film A3 is laminated on the surface of the support film A2 in a peelable state. For example, the surface of the support film A2 is provided with an adhesive layer A4 that adheres to the processing film A3 with a weak adhesive force. The processing film A3 is laminated in a peelable state at the interface between the processing film A3 and the adhesive layer A4. The processing film A3 may be peeled off at the interface between the support film A2 and the adhesive layer A4, in which case the processing film A3 is peeled off from the support film A2 together with the adhesive layer A4. Note that the peelable laminated processing film A3 and support film A2 are not limited to the case where the adhesive layer A4 is interposed between the two layers, and for example, the processing film A3 and support film A2 may be directly pseudo-adhered to each other, so that the processing film A3 and support film A2 are laminated in a peelable state.

[0014] The support film A2 may have a single layer structure or a multi-layer structure in which two or more layers are firmly bonded. FIG. 2 illustrates the support film A2 having a single layer structure. The support film A2 has a mechanical strength sufficient to prevent the support film A2 from breaking when the web A1 is transported on the equipment line. The material of the support film A2 is not particularly limited as long as it has the mechanical strength, and examples of the material include known resin films, paper, synthetic paper, nonwoven fabrics, etc.

[0015] The processed film A3 may have a single layer structure or a multi-layer structure in which two or more layers are laminated. The processed film A3 shown in Fig. 2 has a single layer structure. The processed film A3 shown in Fig. 3 has a multi-layer structure, for example, a five-layer structure. When the processed film A3 has a multi-layer structure, at least one of the layers may be laminated so as to be peelable from the other layers, or all the layers may be firmly bonded together so as to be difficult to peel. The processed film A3 is appropriately selected according to the type of workpiece to be manufactured. For example, the processed film A3 includes an optical functional layer. When the processed film A3 has a multi-layer structure, at least one of the layers may be an optical functional layer and the other layers may be layers other than the optical functional layer (hereinafter referred to as non-optical layers), or all layers may be optical functional layers. When the processed film A3 has a multi-layer structure including an optical functional layer, at least one of the layers may be laminated so as to be peelable from the other layers, or all layers may be firmly bonded so as to be difficult to peel. Examples of the optical functional layer include a polarizer, a retardation layer, a light diffusion layer, a brightness improving layer, an anti-glare layer, and a light reflection layer. A polarizer is a layer that transmits light (polarized light) that vibrates in a specific direction and blocks light that vibrates in other directions. The retardation layer is a layer that exhibits optical anisotropy, and representative examples thereof include stretched films of acrylic resins, cycloolefin resins, cellulose resins, and the like. Examples of the non-optical layer include a protective layer, a pressure-sensitive adhesive layer, and a release liner. The protective layer is a layer that is laminated for the purpose of protecting the optical functional layer, and a colorless and transparent protective film is typically used.

[0016] The processed film A3 having the layer structure shown in FIG. 3 is composed of a first layer A31 / a second layer A32 / a third layer A33 / a fourth layer A34 / a fifth layer A35 in order from the top of the page. In the case of this layer structure, in one exemplary processed film A3, for example, the first layer A31 is a first protective layer, the second layer A32 is an optical functional layer such as a polarizer, the third layer A33 is a second protective layer, the fourth layer A34 is an adhesive layer, and the fifth layer A35 is a third protective layer. In addition, when the processed film A3 includes an adhesive layer, the adhesive strength is greater than the adhesive strength between the processed film A3 and the support film A2. Therefore, as described later, when the workpiece is separated from the processed film A3, the workpiece is not peeled off at the interface of the adhesive layer included in the processed film A3, but can be reliably peeled off between the processed film A3 and the support film A2.

[0017] The thickness of the processed film A3 is not particularly limited and is appropriately set according to the type of workpiece to be formed. For example, the thickness of the processed film A3 is 100 μm or more, preferably 150 μm or more. There is no particular upper limit to the thickness of the processed film A3, but it is generally 500 μm or less, preferably 400 μm or less. In particular, in the case of a thick processed film A3, curvature is easily caused by the blade tip jumping up, but according to the present invention, even if the processed film A3 is relatively thick, for example, 350 μm or more, it is possible to punch a workpiece with reduced curvature. The thickness of the support film A2 is not particularly limited, but if it is too small, the support film A2 may break while the web A1 is being conveyed on the exit side of the rotary die cutter after the web A1 has passed through the rotary die cutter. From this viewpoint, the thickness of the support film A2 is, for example, 20 μm or more, preferably 40 μm or more. There is no particular upper limit to the thickness of the support film A2, but from the viewpoint of cost-effectiveness, it is 100 μm or less, preferably 50 μm or less.

[0018] [Workpiece manufacturing equipment] FIG. 4 shows an outline of the workpiece manufacturing apparatus 1. FIG. 5 is an enlarged plan view of the periphery of the rotary die cutter 2 as viewed from above (the die roll 6 side). However, in FIG. 5, the rear and front sides of the transport direction of the web A1 are omitted. FIG. 6 is an enlarged cross-sectional view cut in a direction perpendicular to the axial direction of the die roll 6 and the anvil roll 7. However, in FIG. 6, the bearer part appearing on the far side of the page is omitted. In each figure, the transport direction of the web A1 is indicated by a hollow arrow, and the rotation direction of the die roll 6 and the anvil roll 7 is indicated by a thin arrow. The front side of the transport direction of the web A1 means the leading side when the web A1 is transported, and the rear side of the transport direction means the opposite side. The workpiece manufacturing apparatus 1 includes a rotary die cutter 2 having a die roll 6 and an anvil roll 7, and a transport section 3 that transports a long strip-shaped web A1 from the entrance side to the exit side of the rotary die cutter 2. If necessary, the manufacturing apparatus 1 may include a workpiece removal section 4 that peels the workpiece from the web A1, and a recovery section 5 that recovers the workpiece.

[0019] <Rotary die cutter> The rotary die cutter 2 has a die roll 6 and an anvil roll 7 arranged facing each other. The die roll 6 has a rotating shaft 61, a cylindrical roll body 62 provided around the rotating shaft 61, a blade portion 63 provided on the outer circumferential surface of the roll body 62, and a bearer portion 64 provided on both ends of the roll body 62. The rotating shaft 61 of the die roll 6 extends parallel to the width direction of the web A1. The roll body 62 shown in FIG. 6 is solid, but the roll body 62 may be hollow (not shown). The roll body 62 is rotatable. For example, the roll body 62 may be rotatable around the axis of the rotating shaft 61 by attaching the roll body 62 to the rotating shaft 61 via a bearing or the like, or the roll body 62 may be rotatable by fixedly attaching the roll body 62 to the rotating shaft 61 and attaching the rotating shaft 61 to the frame of the device 1 via a bearing or the like. The diameter of the roll body 62 of the die roll 6 is appropriately set, but is, for example, 80 mm or more and 500 mm or less.

[0020] The blade portion 63 protrudes in the radial direction from the outer peripheral surface of the roll body 62. One blade portion 63 punches out one workpiece from the web A1. At least one blade portion 63 is provided on the outer peripheral surface of the roll body 62 of the die roll 6. Usually, a plurality of blade portions 63 are provided on the roll body 62. In the example shown in FIG. 5 and FIG. 6, three blade portions 63 are provided in the width direction of the roll body 62, and four blade portions 63 are provided in the circumferential direction of the roll body 62. However, the number of blade portions 63 of the die roll 6 is not limited to this. The blade portions 63 are arranged at equal intervals in the circumferential direction and at equal intervals in the width direction, but may be arranged without intervals. In addition, adjacent blade portions 63 may be arranged without intervals. As shown in FIG. 5, when viewed from the radial direction of the roll body 62, the shape of the cutting edge of the blade portion 63 is a closed ring. The shape of the cutting edge of the blade portion 63 matches the contour of the workpiece B. In the example shown in FIG. 5, the shape of the cutting edge of the blade portion 63 when viewed from the radial direction of the roll body 62 is substantially rectangular, and in this case, a substantially rectangular workpiece B is formed. However, the shape of the cutting edge of the blade portion 63 (the shape of the workpiece B) is not limited to a substantially rectangular shape, and is appropriately set according to the type of workpiece B to be formed. For example, when forming a workpiece B having an arc-shaped edge, the blade portion 63 has an arc-shaped cutting edge. Although a double-edged blade is shown as an example of blade portion 63 with reference to the cross-sectional view of FIG. 6, blade portion 63 may be a single-edged type or a double-edged type (not shown).

[0021] The blade portion 63 includes a cutting edge extending in the width direction. The cutting edge extending in the width direction may extend parallel to the width direction, or may extend at an angle with respect to the width direction. When the cutting edge extends at an angle with respect to the width direction, the angle is, for example, 45 degrees or less with respect to the width direction. In the example shown in FIG. 5, the blade portion 63 has a first cutting edge 631 and a second cutting edge 632 extending parallel to the width direction of the web A1, and a third cutting edge 633 and a fourth cutting edge 634 extending parallel to the transport direction of the web A1. The first cutting edge 631 extending in the width direction of the web A1 is a cutting edge located on the rear side in the transport direction of the web A1, and the second cutting edge 632 extending in the width direction of the web A1 is a cutting edge located on the front side in the transport direction of the web A1. In other words, the first cutting edge 631 is a cutting edge located on the rear side in the rotation direction of the die roll 6 with respect to one blade portion 63, and the second cutting edge 632 is a cutting edge located on the front side in the rotation direction of the die roll 6 with respect to the same blade portion 63. All of the cutting edges 631 to 634 are straight, but as described above, for example, when forming a workpiece B having an arc-shaped edge, at least one of the cutting edges or all of the cutting edges are formed in an arc shape. The protruding height of the blades 63 of the die roll 6 is equal to or greater than the thickness of the film A3 to be processed, and is, for example, equal to or greater than 300 μm and equal to or less than 1.5 mm.

[0022] The anvil roll 7 has a rotating shaft 71 and a cylindrical roll body 72 provided around the rotating shaft 71. The rotating shaft 71 of the anvil roll 7 extends parallel to the width direction of the web A1. The roll body 72 shown in FIG. 6 is solid, but the roll body 72 of the anvil roll 7 may be hollow. The outer peripheral surface of the roll body 72 of the anvil roll 7 is smooth. The roll body 72 is rotatable. For example, the roll body 72 may be rotatable around the axis of the rotating shaft 71 by attaching the roll body 72 to the rotating shaft 71 via a bearing or the like, or the roll body 72 may be rotatable by fixedly attaching the roll body 72 to the rotating shaft 71 and attaching the rotating shaft 71 to the frame of the device 1 via a bearing or the like. In addition, a bearer portion may be provided at both ends of the roll body 72 of the anvil roll 7 (not shown). When the anvil roll 7 is provided with a bearer portion, the die roll 6 may be provided with a bearer portion 64, or the die roll 6 may not be provided with a bearer portion 64. The diameter of the roll body 72 of the anvil roll 7 is set appropriately, and is, for example, 70 mm or more and 400 mm or less. The diameter of the roll body 72 of the anvil roll 7 is preferably smaller than the diameter of the roll body 62 of the die roll 6, and is preferably smaller than the diameter of the roll body 62 of the die roll 6 by, for example, more than 0 mm and 100 mm or less. By making the diameter of the anvil roll 7 smaller than the diameter of the die roll 6, the blade portion 63 of the die roll 6 can be more quickly separated from the web A1 transported along the outer circumferential surface of the anvil roll 7 at the exit side of the rotary die cutter 2.

[0023] When the cutting edge of the blade portion 63 of the rotating die roll 6 approaches the rotating anvil roll 7, the blade portion 63 of the die roll 6 penetrates the web A1 to the deepest extent and forms a cut line C in the web A1. That is, at the point where the gap between the roll body 62 of the die roll 6 and the roll body 72 of the anvil roll 7 is smallest, the blade portion 63 of the die roll 6 penetrates the web A1 to the deepest extent and forms a complete cut line C (deepest cut line C) in the web A1. For convenience, this point is called the "deepest cut point D." At the deepest cut point D, the cutting edge of the blade portion 63 may be in contact with the outer peripheral surface of the anvil roll 7, or may have a slight clearance with respect to the outer peripheral surface of the anvil roll 7. From the viewpoint of reducing wear of the cutting edge, as shown in FIG. 6, at the deepest cut point D, the cutting edge of the blade portion 63 is slightly separated from the anvil roll 7 (has a clearance). The clearance can be appropriately set by adjusting the thickness of the bearer portion.

[0024] <Transportation section> The conveying section 3 conveys the long strip-shaped web A1 on the line of the apparatus 1 in its longitudinal direction. Referring to FIG. 4, the conveying section 3 has an unwinding section 31, a guide roll 32 that guides the web A1, a drive device (not shown), and a guide roll 33 that displaces the conveying path of the web A1 toward the anvil roll 7. The conveying section 3 conveys the web A1 from the unwinding section 31 to the entrance side and exit side of the rotary die cutter 2. The unwinding section 31 is a section where the web A1 wound in a roll is loaded. The web A1 is unwound on a line from the unwinding section 31 by a driving device, and is guided through a guide roll 32 and led to between the die roll 6 and the anvil roll 7 of the rotary die cutter 2. Immediately after leaving the rotary die cutter 2, the web A1 is guided to the anvil roll 7 side by the guide roll 33, as described below. The guide roll 33 is a roll for shifting the transport path of the web A1 toward the anvil roll 7 at the exit side of the rotary die cutter 2. From another perspective, the guide roll 33 is a roll for transporting the web A1 along the outer circumferential surface of the anvil roll 7 at the exit side of the rotary die cutter 2. For example, the guide roll 33 may be a roll having a similar configuration to the guide roll 32. For example, as shown in FIG. 4, the guide roll 33 is disposed on the anvil roll 7 side of the tangent line S of the anvil roll 7 at the deepest cutting point D, based on the tangent line S. The tangent line S is indicated by a thin dashed line.

[0025] <Work removal section> The workpiece removal section 4 peels off and separates the area (workpiece B) of the processed film A3 surrounded by the cut lines C from the support film A2. Referring to FIG. 4, the workpiece removal section 4 has a peeling section 41 and a winding section 42 that winds up the web A1 after the workpiece B has been separated. The peeling section 41 is made of, for example, a plate-like member that extends in the width direction and has a triangular shape when viewed from the side. For example, the peeling section 41 is formed into a triangular prism shape as a whole. The tip of the peeling section 41 may be sharp, but is preferably formed into an arc shape from the viewpoint of preventing breakage of the web A1. The winding section 42 winds up the web A1 after it has been turned over by the peeling section 41 and the workpiece B has been peeled off into a roll and collects it.

[0026] <Collection Department> The recovery section 5 recovers the work B separated from the web A1 in the work removal section 4 into a container 51 or the like.

[0027] [Work manufacturing method] Next, a method for manufacturing a workpiece will be described. Although the manufacturing method will be described in a case where the manufacturing method is carried out using the above-mentioned manufacturing apparatus 1, the manufacturing method for a workpiece is not limited to the case where the manufacturing method is carried out using the above-mentioned manufacturing apparatus 1. The manufacturing method of the work B involves transporting a long strip-shaped web A1 and passing the web A1 between a die roll 6 and an anvil roll 7 of a rotary die cutter 2 having a die roll 6 and an anvil roll 7, thereby forming a cut line C in the web A1 that defines the contour of the work B. Immediately after the cut line C is formed and the web A1 exits the deepest cutting point D between the die roll 6 and the anvil roll 7, the web A1 is displaced and transported toward the anvil roll 7. That is, on the exit side of the rotary die cutter 2, the web A1 is displaced and transported toward the anvil roll 7. In addition, the web A1 immediately after the cut line C is formed and the web A1 exits the deepest cutting point D between the die roll 6 and the anvil roll 7 is transported along the outer circumferential surface of the anvil roll 7. That is, on the exit side of the rotary die cutter 2, the web A1 is transported along the outer circumferential surface of the anvil roll 7.

[0028] Fig. 7 is a cross-sectional view further enlarged from Fig. 6. However, Fig. 7 does not show all of the blade portion 63, but shows only the blade portion 63 having a cutting edge (e.g., first cutting edge 631) extending in the width direction. 4 to 7, the web A1 is unwound from the unwinding section 31 by the conveying section 3, and the web A1 is introduced between the die roll 6 and the anvil roll 7 at the entrance side of the rotary die cutter 2. When the web A1 is introduced from the entrance side of the rotary die cutter 2, the direction of the web A1 is not particularly limited, but it is preferable to convey the web A1 in a direction L perpendicular to a line connecting the center 611 of the rotation shaft 61 of the die roll 6 and the center 711 of the rotation shaft 71 of the anvil roll 7, and pass the web A1 between the die roll 6 and the anvil roll 7 (the perpendicular direction L is represented by a dashed line in FIG. 6). In other words, the web A1 is introduced between the die roll 6 and the anvil roll 7 at the entrance side of the rotary die cutter 2 in parallel with the tangent line S of the anvil roll 7 at the deepest cutting point D (the tangent line S is represented by a thin dashed line in FIG. 6). By introducing the web A1 in such a direction, a neat cut line C can be formed in the web A1.

[0029] The die roll 6 and the anvil roll 7 rotate in synchronization with the transport of the web A1, and the blade portion 63 of the die roll 6 forms a cut line C that defines the contour of the workpiece B in the plane of the web A1 introduced between the two rolls 6 and 7. However, the blade portion 63 of the die roll 6 does not completely cut the web A1. The blade portion 63 of the die roll 6 completely cuts the processed film A3, but does not completely cut the support film A2. The meaning of not completely cutting the support film A2 includes the case where no cut is formed in the support film A2, or the case where the support film A2 is slightly cut in the thickness direction (so-called the case where a half-cut line is formed in the support film A2). The examples shown in Figures 6 and 7 illustrate the case where the blade portion 63 enters the middle part of the thickness direction of the support film A2, and a half-cut line is formed in the support film A2. Therefore, the penetration depth H1 of the blades 63 of the die roll 6 into the web A1 satisfies the relationship: thickness of the processed film A3≦penetration depth H1 of the blades 63 of the die roll 6<thickness of the web A1. FIG. 7 shows the penetration depth H1. However, when half-cut lines are formed in the support film A2, if the depth of the half-cut lines is too great, the support film A2 may break at the exit side of the rotary die cutter 2. For this reason, when half-cut lines are formed in the support film A2, it is preferable to set the thickness H2 of the support film A2 at the portion corresponding to the half-cut line to 15 μm or more. Figure 7 shows the penetration depth H1 and the thickness H2 of the support film A2 at the portion corresponding to the half-cut line.

[0030] The conveying path of the web A1 immediately after the cut line C is formed and the web A1 exits the deepest cut point D on the forward side in the conveying direction is changed to the anvil roll 7 side by the guide roll 33. By displacing the web A1 toward the anvil roll 7 and conveying it in this manner at the exit side of the rotary die cutter 2, the web A1 on which the cut line C is formed is conveyed along a part of the outer circumferential surface of the anvil roll 7. In particular, it is preferable that the web A1 has a range in which it is conveyed along a part of the outer circumferential surface of the anvil roll 7 even after the cutting edge 631 of the blade portion 63 has completely separated from the web A1. By conveying the web A1 along the outer circumferential surface of the anvil roll 7 in this manner, at the exit side of the rotary die cutter 2, the web A1 is conveyed in a curved shape with the die roll 6 side being convex, following the outer circumferential surface of the anvil roll 7. In addition, for the purpose of interpretation, the expression "exit side of the rotary die cutter 2" also includes an area that is in front of the deepest cutting point D in the conveying direction of the web A1 and is much further away from the die roll 6. However, the exit side of the rotary die cutter 2 here refers to the area of ​​the exit side of the rotary die cutter 2 that includes the deepest cutting point D and is sandwiched between the die roll 6 and the anvil roll 7. Preferably, the web A1 on which the cut lines C are formed is transported on the exit side of the rotary die cutter 2 without separating the work B (the area surrounded by the cut lines C) from the web A1.

[0031] When the web A1 is conveyed toward the anvil roll 7, the conveying angle α of the web A1 at the exit side of the rotary die cutter 2 is, for example, more than 0 degrees and not more than 90 degrees, and preferably 5 degrees or more and not more than 80 degrees. FIG. 6 shows the conveying angle α. If the conveying angle α of the web A1 at the exit side of the rotary die cutter 2 is too large, a part of the work B may be separated (peeled off) from the web A1 while being conveyed along the outer peripheral surface of the anvil roll 7. The conveying angle α refers to the angle between the tangent S of the anvil roll 7 at the deepest cutting point D and the web A1. However, since the part of the web A1 along the outer peripheral surface of the anvil roll 7 is arc-shaped, the conveying angle α refers to the angle between the tangent S of the anvil roll 7 at the deepest cutting point D and the part of the web A1 that is linear away from the outer peripheral surface of the anvil roll 7. 7, it is preferable to transport the web A1 close to the anvil roll 7 so that a gap F is generated between the blade portion 63 and the web A1 at the deepest cutting point D. When the web A1 is transported parallel to the tangent line S of the anvil roll 7 at the deepest cutting point D on the exit side of the rotary die cutter 2, no gap is generated between the blade portion 63 that has entered the web A1 and the web A1. However, when the web A1 is transported along the outer circumferential surface of the anvil roll 7, a substantially V-shaped gap F is generated between the blade portion 63 and the web A1 at the deepest cutting point D.

[0032] According to the manufacturing method of the present invention, the web A1 is displaced toward the anvil roll 7 at the exit side of the rotary die cutter 2 and conveyed, so that when the cutting edge (for example, the first cutting edge 631) of the blade portion 63 at the deepest cutting point D moves in an arc due to the rotation of the die roll 6, the web A1 moves away from the cutting edge. This makes it possible to suppress the phenomenon in which the cutting edge of the blade portion 63 jumps up the edge of the workpiece B. In particular, by displacing the web A1 toward the anvil roll 7 and conveying it so that a gap F is generated between the blade portion 63 and the web A1 at the deepest cutting point D, it is possible to further suppress the workpiece B from being jumped up by the cutting edge. This makes it possible to suppress the edge of the workpiece B from being curved or wrinkled. In addition, since the web A1 is transported along the outer peripheral surface of the anvil roll 7 at the exit side of the rotary die cutter 2, the web A1 is transported forming a curved surface with the die roll 6 side being convex. As a result, even if the edge of the work B is slightly flipped up by the cutting edge of the blade portion 63 and the edge of the work B is slightly curved toward the die roll 6 side, the web A1 is bent in the opposite direction to the curvature caused by the cutting edge while the web A1 is moving along the outer peripheral surface of the anvil roll 7. Therefore, the curvature caused by the cutting edge is canceled, and a work B that is less likely to be curved or wrinkled at the edge can be obtained.

[0033] The web A1 after the cut lines C are formed is conveyed to a work removal section 4, where the work B is separated from the web A1. The obtained work B is recovered in a recovery section 5. In the above, the step of forming the cut lines C in the web A1, the step of separating the work B from the web A1, and the step of recovering the work B are performed on one line of the manufacturing apparatus 1, but the step of forming the cut lines C and the separation and recovery steps may be performed on different lines. For example, after the web A1 is transported to the rotary die cutter 2 to form the cut lines C in the web A1, the web A1 may be wound up in a roll and transferred to another line to separate and recover the work B from the web A1.

[0034] [Other embodiments] In the above embodiment, the die roll 6 is provided with a plurality of blade portions 63 independent of each other, but for example, as shown in Fig. 8 and Fig. 9, adjacent blade portions 63 may be arranged without any gaps. In the illustrated example, adjacent blade portions 63 in the width direction share a blade edge extending parallel to the transport direction of the web A1, and adjacent blade portions 63 in the circumferential direction share a blade edge extending parallel to the width direction. In this case, the blade edge 636 extending in the width direction of the web A1 is the blade edge located on the rear side of one blade portion 63 in the transport direction and is also the blade edge located on the front side of the blade portion 63 adjacent to that blade portion 63 in the transport direction. [Explanation of symbols]

[0035] 1. Workpiece manufacturing equipment 2 Rotary Die Cutter 3. Conveyor 33 Induction Roll 6 Die Roll 61 Die roll rotation axis 611 Center of the die roll rotation axis 7 Anvil Roll 71 Anvil roll axis 711 Center of rotation axis of anvil roll A1 Web A2 Support Film A3 Processing Film B Work C Cut line

Claims

1. A method for manufacturing a workpiece, comprising: conveying a long strip-shaped web and passing the web between a die roll and an anvil roll of a rotary die cutter having a die roll and an anvil roll, thereby forming a cut line in the web that defines a contour of the workpiece, A method for manufacturing a workpiece, comprising displacing the web toward the anvil roll at the exit side of the rotary die cutter and transporting the web.

2. A method for manufacturing a workpiece, comprising: conveying a long strip-shaped web and passing the web between a die roll and an anvil roll of a rotary die cutter having a die roll and an anvil roll, thereby forming a cut line in the web that defines a contour of the workpiece, A method for manufacturing a workpiece, comprising: transporting the web along the outer peripheral surface of the anvil roll at the exit side of the rotary die cutter.

3. The method for manufacturing a workpiece according to claim 1 or 2, wherein the web is transported without separating the workpiece from the web at the exit side of the rotary die cutter.

4. The web has a support film and a processing film laminated on the support film, The method for manufacturing a workpiece according to claim 1 or 2, wherein the die roll forms the cut lines in the processed film without completely cutting into the support film.

5. A method for manufacturing a workpiece as described in claim 1 or 2, wherein, at the entry side of the rotary die cutter, the web is transported in a direction perpendicular to a line connecting the center of the rotation axis of the die roll and the center of the rotation axis of the anvil roll, and passed between the die roll and the anvil roll.

6. A manufacturing device for a workpiece, comprising: a rotary die cutter having a die roll and an anvil roll; and a conveying section that conveys a long strip-shaped web from an entrance side to an exit side of the die roll, the conveying section passing the web between the die roll and the anvil roll to form a cut line that defines a contour of the workpiece, A workpiece manufacturing apparatus, wherein the transport section has a guide roll at the exit side of the rotary die cutter that displaces the transport path of the web toward the anvil roll.

7. The workpiece manufacturing apparatus according to claim 6 , wherein the transport section transports the web without separating the workpiece from the web at the exit side of the rotary die cutter.

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