JP2004181539A - Punching die for rotary die cutter and ruled line marking mold of rotary ruled line marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching die for a rotary die cutter which can produce a punched product having high dimensional accuracy. <P>SOLUTION: An outer blanking blade 2 to correspond to a shape of a product is installed on a die plate 1 in a circular arc shape along an outer periphery of a die cylinder. Respective sheet feed dogs 10 to extend in the peripheral direction of the die plate are installed on both the sides of the outer blanking blade, and a blanked product having highly dimensional accuracy is obtained by preventing slippage between a sheet and the outer blanking blade 2 through engagement of the respective sheet feed dogs with the sheet. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting die for a rotary die cutter and a cutting die for a rotary scoring device.
[0002]
[Prior art]
As shown in FIG. 7, a rotary die cutter for punching a sheet such as a corrugated cardboard sheet into a predetermined shape is provided with a punching die A ′ on an outer periphery of a die cylinder 31 disposed below and opposed to an anvil cylinder 30, and the punching die A ′ is provided. The sheet S fed between the cylinders 30 and 31 is punched into a predetermined shape by the outer shape punching blade 2 'attached to A'.
[0003]
Here, the rotary die cutter is a hard type in which the cutting edge of the outer shape punching blade 2 ′ is brought into contact with a plating film formed on the outer periphery of the anvil cylinder 30 to punch out the sheet S, and is wound around the outer periphery of the anvil cylinder 30. The semi-hard type in which the sheet S is punched by bringing the cutting edge of the profile punching blade 2 ′ into contact with the stainless steel plate, and the cutting edge of the profile punching blade 2 ′ is formed on an elastic layer such as urethane rubber provided on the outer periphery of the anvil cylinder 30. And a soft type in which the sheet S is punched out.
[0004]
FIG. 8 shows an example of the punching die A ′ attached to the outer periphery of the die cylinder 31. The punching die A 'includes an outer shape punching blade 2' having a shape corresponding to the outer peripheral shape of a product on an arc-shaped template 1 ', and a punching hole forming blade 3 forming a punching hole inside the outer shape punching blade 2'. And a pressing ruled member 4 'forming a ruled line for bending.
[0005]
By attaching the punching die A ′ having the above configuration to the die cylinder 31 of the rotary die cutter shown in FIG. 7 and feeding the sheet S between the die cylinder 31 and the anvil cylinder 30, the outer shape punching blade 2 ′ and Since the punching hole forming blade 3 'penetrates the sheet S and the ruled member 4' pushes the sheet S, the sheet S has the same shape as the product by the outer shape punching blade 2 'as shown in FIG. Is formed, and a punching line b for forming a hole is formed by the punching hole forming blade 3 '. Also, a folding ruled line c is formed by the pressing ruled member 4 '.
[0006]
In the sheet S shown in FIG. 9, the inside of the contour punching cutting line a is a product part d, and the product part d is removed from the contour punching debris e outside the contour punching cutting line a in the next step.
[0007]
When punching the sheet S as described above, the outer shape punching blade 2 'and the punching hole forming blade 3' cut the sheet S and apply a feeding force to the sheet S. However, as in the punching die A 'shown in FIG. When the profile cutting blade 2a 'for vertical cutting for cutting the sheet S in the feed direction extends linearly in the circumferential direction of the template 1', or the profile cutting blade 2a 'for vertical cutting has a straight portion. In such a case, slippage occurs between the sheet S and the sheet S at the straight portion, so that the sheet S cannot be fed with high accuracy, and punching with high dimensional accuracy cannot be performed.
[0008]
In order to solve such a problem, a friction piece made of rubber is attached to the outer side of the outer shape punching blade for vertical cutting of the outer shape punching blade attached to the template, and a feed force is applied to the sheet by contact with the friction piece. Die dies adapted to be provided have been proposed.
[0009]
[Problems to be solved by the invention]
By the way, in a punching die with a friction piece attached, a feeding force is applied by bringing the friction piece into surface contact with the sheet, so that slipping of the sheet cannot be reliably prevented, and a punched product with high dimensional accuracy can be obtained. There is a disadvantage that you can not.
[0010]
Here, in the rotary die cutter, a ruler is attached to the outer periphery of the die cylinder, and a pressing member provided on the ruler is pressed against the sheet to form only a ruled line for folding on the sheet. May be used as a device.
[0011]
In the use as such a ruler, for example, as shown in FIG. 10 (I), a plurality of horizontal ruled lines f ₁ , f ₁ for flap folding having a step on a rectangular sheet S having the same size as a product. ₂ is provided at a symmetrical position with the width center line of the sheet S as a symmetrical line, the ruled members are attached to the ruled mold in the same arrangement as the horizontal ruled lines f ₁ and f ₂ , and the symmetrically arranged ruled members are attached. It is necessary to attach a friction piece of rubber or the like for applying a feeding force to the sheet and attach the crease type to a die cylinder for scoring.
[0012]
In this case, the feeding force is applied by bringing the friction piece into surface contact with the sheet S in the same manner as described above, so that slipping of the sheet S cannot be reliably prevented, and the slipping of the sheet S causes the sheet S to move to a predetermined position. Cannot be scored. For this reason, there is an inconvenience that high-precision scoring cannot be performed.
[0013]
In addition, the sheet S after scoring shown in FIG. 10 (I) has a corner portion on one side punched out and removed as shown in FIG. A plurality of slots g are formed from both sides of each of the horizontal ruled lines f ₁ , f ₂ to both ends, and a plurality of vertical ruled lines f ₃ are formed to obtain a product.
[0014]
An object of the present invention is to provide a punching die for a rotary die cutter and a ruled sheet with high dimensional accuracy which can reliably prevent sheet slippage and obtain a punched product with high dimensional accuracy. The object of the present invention is to provide a scoring type of a scoring device.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, a rotary die cutter for a rotary die cutter according to the present invention has a rotary die cutter in which an outer shape punching blade corresponding to the shape of a product is mounted on an arc-shaped template along an outer periphery of a die cylinder. In the punching die for use, a sheet that extends in the circumferential direction of the template on both sides of the profile punching blade of the template and engages with a portion corresponding to the profile punching debris of the sheet to apply a feeding force to the sheet A configuration with a feed dog is adopted.
[0016]
As described above, by providing the sheet feed teeth engaging with the sheet on both sides of the outer shape punching blade, slipping of the sheet can be prevented, the sheet can be fed extremely accurately, and the sheet feed tooth has the outer shape. The punched product is engaged, so that the punched product is not damaged.
[0017]
Here, the punching die may be one in which a ruled pressing member is attached to the inside of the outer shape punching blade.
[0018]
In the punching die according to the present invention, if the sheet feed teeth are provided in parallel on both sides of the outer shape punching blade, the engaging force on the sheet increases, and the sheet can be fed more accurately than the sheet.
[0019]
The sheet feed dog may be formed of an arcuate plate in which protruding pieces that can penetrate the sheet are formed at intervals on the outer circumferential arc edge, or may be implanted at intervals in the circumferential direction of the template. It may consist of a number of pins provided.
[0020]
In a crease type of a crease device according to the present invention, a rotary member for attaching a ruled member to an arc-shaped template, pressing the ruled member against a sheet conveyed in one direction, and forming a ruled line on the sheet. In a ruler of a ruler, the template is provided with at least two sheet feed teeth extending in a circumferential direction of the template and engaging with the sheet to apply a feeding force when the sheet is ruled. Is adopted.
[0021]
As described above, by providing the template with at least two sheet feed teeth extending in the circumferential direction of the template, slipping of the sheet can be prevented, and ruled lines can be formed on the sheet with high accuracy. it can.
[0022]
Here, the same sheet feed teeth as the sheet feed teeth attached to the punching die can be adopted as the sheet feed teeth. When the sheet feed dog engages with the sheet, the sheet is scratched by the feed dog, but the surface on which the scratch is formed is the surface that becomes inside when the sheet is folded along the ruled line, No problem.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a cutting die for a rotary die cutter according to the present invention. In this punching die A, an external shape punching blade 2 having a shape corresponding to the shape of a product is attached to an arc-shaped die plate 1.
[0024]
Here, the outer shape punching blade 2 has the same shape as the outer shape punching blade 2 ′ of the punching die A ′ shown in FIG. 8, and a punching hole forming blade 3 that forms a punching hole inside the outer shape punching blade 2 and A creasing member 4 for creasing a folding ruled line on the sheet is attached.
[0025]
A sheet feed tooth 10 extending in the circumferential direction of the template 1 is attached to the template 1 on the outer side of a pair of vertical cutting external punching blades 2a for cutting the sheet S of the external punching blade 2 in the feed direction. I have.
[0026]
As shown in FIGS. 1 to 3 (I), the sheet feed dog 10 is provided with a protruding piece 12 that can penetrate the sheet S at an arc edge on the outer periphery of an arcuate plate 11 extending in the circumferential direction of the template 1. Is provided.
[0027]
Here, the arc-shaped plate 11 may be a metal plate or a synthetic resin plate. The circumferential length of the arc-shaped plate 11 is longer than the circumferential length of the external cutting blade 2 a for vertical cutting of the external cutting blade 2, and the inner peripheral portion is press-fitted into a slit 5 formed in the template 1.
[0028]
Here, the protruding piece 12 has a mountain shape, but the shape of the protruding piece 12 is arbitrary, and a shape such as a trapezoid or a square can be adopted.
[0029]
The punching die shown in the embodiment has the above structure. When the punching die is attached to the outer periphery of the die cylinder 31 shown in FIG. The feed force is applied to the sheet S by piercing. For this reason, there is no inconvenience that slippage occurs between the sheet S and the outer shape punching blade 2, and the sheet S can be punched with extremely high accuracy by the outer shape punching blade 2. Obtainable.
[0030]
Further, since the protruding piece 12 of the arc-shaped plate 11 penetrates a portion corresponding to the outer shape punching waste e of the sheet S shown in FIG. 9, the product portion d is not damaged.
[0031]
In the example shown in FIGS. 1 to 3 (I), the arc-shaped plate 11 having the protruding pieces 12 on the outer periphery is provided on both sides of the outer shape punching blade 2, however, as shown in FIG. A plurality of arc-shaped plates 11 may be provided in parallel on each of the outer sides of the outer cutting punch 2a for vertical cutting.
[0032]
As shown in FIG. 3 (II), by providing a plurality of arc-shaped plates 11 in parallel, the engaging force on the sheet S increases, so that the slip of the sheet S can be more reliably prevented.
[0033]
When a plurality of arcuate plates 11 are provided in parallel, the position of the plurality of arcuate plates 11 in the circumferential direction is shifted by an amount corresponding to a value obtained by dividing the pitch P of the protruding pieces 12 by the number of the arcuate plates 11. Since the protruding pieces 12 of the arc-shaped plate 11 adjacent in the axial direction face the protruding pieces 12 adjacent in the direction, the plurality of protruding pieces 12 can penetrate the sheet S, and the sheet S slides. Can be more reliably prevented.
[0034]
In the example shown in FIG. 2, the projecting piece 12 is formed continuously on the arc edge of the outer periphery of the arc-shaped plate 11, but as shown in FIG. 12 may be discontinuous.
[0035]
In FIGS. 2 and 4, the arcuate plate 11 having the protruding pieces 12 on the outer circular arc edge is used as the sheet feed dog 10, but the sheet feed dog 10 is not limited to this. For example, as shown in FIG. 5, a large number of pins 14 that can penetrate the sheet may be planted at intervals in the circumferential direction of the template 1.
[0036]
FIG. 6 shows a scoring die B attached to the outer periphery of the die cylinder 31 when the rotary die cutter shown in FIG. 7 is used as a scoring device. Here, the ruled pattern B indicates a ruled pattern for ruled the ruled sheet S shown in FIG. 10 (I), and the ruled lines f ₁ and f ₂ shown in FIG. At the same time, the insertion ruled member 21 is attached, and the sheet feed teeth 10 extending in the circumferential direction are attached to both axial ends of the template 20.
[0037]
Here, as the sheet feed teeth 10, the sheet feed teeth 10 shown in FIGS. 2, 4 and 5 can be adopted. When the sheet feed teeth 10 shown in FIGS. The height is preferably lower than the thickness of the sheet S. When the sheet feed dog 10 shown in FIG. 5 is employed, it is preferable that the height of the pin 14 be lower than the thickness of the sheet S.
[0038]
When the scoring die B having the above configuration is attached to the die cylinder 31 of the rotary die cutter shown in FIG. 7 and scoring is performed, the sheet feed teeth 10 engage with the sheet S, and a feeding force is applied to the sheet S. You. For this reason, there is no inconvenience that slippage occurs between the sheet S and the pressing member 21, and a ruled line can be accurately formed at a predetermined position of the sheet S.
[0039]
Note that the ruled type is an example, and the present invention is not limited to this.
[0040]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0041]
In the punching die according to any one of claims 1 to 5, since the sheet feed teeth engageable with the sheet are provided on both sides of the contour punching blade, relative slip between the sheet and the contour punching blade is prevented. It is possible to form a punched product with high dimensional accuracy by using the outer shape punching blade.
[0042]
In the scored die according to the sixth aspect, since the template is provided with a plurality of sheet feed teeth extending in the circumferential direction of the template, it is possible to prevent the sheet from slipping when the sheet is scored. In addition, a folding ruled line can be accurately formed at a predetermined position on a sheet.
[Brief description of the drawings]
1 is a perspective view showing an embodiment of a punching die for a rotary die cutter according to the present invention; FIG. 2 is a longitudinal sectional front view of FIG. 1; FIG. 3 (I) is a cross section taken along line III-III of FIG. FIG. 2 (II) is a cross-sectional view showing a state in which the arc-shaped plates shown in FIG. 1 (I) are provided in parallel. FIG. 4 is a cross-sectional view showing another example of the arc-shaped plate. FIG. 6 is a perspective view showing an embodiment of a ruler type of the ruler according to the present invention. FIG. 7 is a schematic diagram of a rotary die cutter. FIG. 8 is a perspective view showing a conventional punching die. FIG. 10 (I) is a plan view showing an example of a scored sheet, and FIG. 10 (II) is a plan view showing a state where the scored sheet shown in FIG. [Explanation of symbols]
REFERENCE SIGNS LIST 1 template 2 outer punching blade 10 sheet feed dog 11 arcuate plate 12 projection 14 pin 20 template 21 pressing member

Claims (6)

In a punching die for a rotary die cutter in which an outer shape cutting blade corresponding to the shape of a product is mounted on an arc-shaped template along the outer periphery of a die cylinder, on both sides of the outer shape cutting blade of the template, A cutting die for a rotary die cutter, comprising: a sheet feed tooth that extends in a circumferential direction and engages with a portion corresponding to an external punching debris of a sheet to apply a feeding force to the sheet. 2. A punching die for a rotary die cutter according to claim 1, further comprising a ruled member for forming a ruled line for folding a sheet on the inside of an outer shape punching blade of the template. The cutting die for a rotary die cutter according to claim 1 or 2, wherein the sheet feed teeth are provided in parallel on both sides of the outer shape punching blade. The die for a rotary die cutter according to any one of claims 1 to 3, wherein the sheet feed dog has a configuration in which projecting pieces that can penetrate the sheet are formed at intervals on an arc edge of an outer periphery of the arc-shaped plate. . The cutting die for a rotary die cutter according to any one of claims 1 to 3, wherein the sheet feed dog comprises a large number of pins implanted at intervals in a circumferential direction of the template. A ruled member is attached to an arc-shaped template, and the ruled member is pressed against a sheet conveyed in one direction to form a ruled line on the sheet. A scoring die for a rotary scoring device, comprising at least two sheet feed teeth extending in the circumferential direction of the template and engaging with the sheet to apply a feeding force when scoring the sheet.

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