JP2006110698A - Flexible die and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible die having a structure which can easily carry out its positioning to a magnet roller and can be accurately mounted on the magnet roller. <P>SOLUTION: A press cutting blade 3 having a required pattern is formed on one side of a flexible base 2. The flexible die 1 is used after bending an edge portion of the flexible base 2. The bending strength of the edge portion M to be bent of the flexible base 2 is weakened so as to be lower than that of other portions by forming a plurality of recessed portions 6 at a specified interval along the edge portion M to be bent of the flexible base 2. As a result, the edge portion of the flexible base 2 can be manually bent, and further the bent up in an acute angle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flexible die (sheet-like blade plate) used for punching and half-cutting.

  Conventionally, as a method of punching or half-cutting, a die board such as a veneer plate is grooved according to the punching pattern, and a strip-shaped blade (Thomson blade) is inserted into the processed groove. The die is mounted on a press machine or the like, and a plastic sheet or the like is punched or half-cut.

  Recently, a flexible die (rotary die or flat die) having a press cutting blade having a pattern shape corresponding to the shape of the cutting line is produced on one side of a flexible base (ferromagnetic material). 9 is attached to the magnet roller 201 of the rotary processing device 200 as shown in FIG. 9 or the magnet plate 301 of the flat plate press device 300 as shown in FIG. Is also employed (see, for example, Patent Document 1 and Patent Document 2). Such a flexible die is manufactured by machining or etching, and what is manufactured by etching is generally called an etching die.

  When punching or the like is performed with the rotary processing apparatus as described above, for example, the following method is employed as a method for positioning and fixing the flexible die to the magnet roller.

  (1) As shown in FIGS. 11 (A) and 11 (B), protrusions 104 for positioning and fixing are formed on both ends (ends in the rotation direction of the magnet roller) of the base 102 of the flexible die 101, respectively. Each end of the base 102 is bent to the back side (the side opposite to the press cutting blade 103) to form bent pieces 102a and 102a.

  (2) As shown in FIG. 12, a pair of grooves 111 and 111 for positioning and fixing are formed in the magnet roller 110 in advance. These grooves 111 and 111 are arranged in a positional relationship corresponding to each bent piece 102a of the base 102 of the flexible die 101, and the distance between the two grooves 111 and 111 (the distance along the outer peripheral surface of the magnet roller 110) is The distance between the bending angles at both ends of the base 102 of the flexible die 101 is set to match.

(3) As shown in FIG. 12, the flexible die 101 is placed along the outer peripheral surface of the magnet roller 110, and the bent pieces 102 a at both ends of the flexible die 101 are fitted into the respective grooves 111 of the magnet roller 110. Then, the presser foot 120 is fitted into each groove 111, and the protrusion 4 of each bent piece 102 a is locked at the tip of each presser foot 120, whereby the flexible die 101 is positioned and fixed to the magnet roller 110. . Each presser foot 120 is fixed to the magnet roller 110 with a set screw (not shown).
JP 2000-198100 A JP 2000-190284 A

  By the way, as shown in FIG. 13, the bending process of the both ends of the flexible die described above is performed with the bending blade 132 in a state where the protrusion 104 at the end of the base 102 is positioned and fixed to the clamp 131 of the bending machine 130. A method is employed in which the end of the base 102 is bent by pressing the base 102 and rotating the bending blade 132.

  However, with such a processing method, it is difficult to make the bending angle an acute angle. In addition, if an attempt is made to make the bending angle an acute angle, a crack occurs in the bent portion. Here, when the bending angle of the both ends of the flexible die is not an acute angle but is a round shape in which the vicinity of the bending angle is slightly swollen, when the flexible die is mounted on the magnet roller, as shown in FIG. As a result, “floating of the base” occurs in the vicinity, and accurate punching or the like cannot be performed.

  Furthermore, when bending the end of the flexible die using the bending machine 130 described above, the bending is performed in a state where the protrusion 104 at the base end is positioned and fixed to the clamp 131. The position accuracy of the will deteriorate. In particular, in the case of an etching die, the distance between the ridge that serves as a reference for bending and the pressing blade becomes unstable, and the distance between the bending position (corner) after bending and the pressing blade is not constant. . As described above, when the accuracy of the bending position with respect to the pressing blade is deteriorated, the distance (arc distance) L between the two grooves 111 and 111 of the magnet roller shown in FIG. When the flexible die 101 is attached to the magnet roller 110, it is difficult to align the flexible die 101 with the magnet roller 110.

  The present invention was made to solve such a problem, and provides a flexible die having a structure that can be easily positioned on a magnet roller or the like and can be accurately mounted on the magnet roller, and the like. An object of the present invention is to provide a method for manufacturing a flexible die having such characteristics.

  The flexible die of the present invention is a flexible die in which a pressing blade having a predetermined pattern is formed on one side of a base made of an elastic material, and is used by bending an end portion of the base, where the base end portion is to be bent. The (folding planned line) is processed such that the bending planned portion has a bending strength weaker than other portions. More specifically, a plurality of concave portions are processed at a predetermined pitch along the portion to be bent at the base end so that the bending strength of the portion to be bent is weaker than that of the other portions. In addition, the recessed part formed in the part to be bent may be formed by etching, or may be formed by fine machining.

  According to the flexible die of the present invention, the bending end portion of the base end portion is subjected to processing such as a concave portion, so that the bending strength of only the planned bending portion is weakened. Bending progresses starting from the weakly scheduled portion of bending. Therefore, it is possible to accurately perform the bending process at a constant position, that is, a portion to be bent.

  In addition, by reducing the bending strength of only the part to be bent, it becomes possible to perform an acute bending process that does not bulge in the vicinity of the bending angle, so when the flexible die is attached to the magnet roller, the bending angle at the base end No “base lift” occurs in the vicinity of, so that accurate machining can always be realized. Further, by weakening the bending strength of only the portion to be bent, the base end portion can be bent manually.

  Furthermore, in the flexible base of the present invention, the concave portions at both ends of the concave group formed along the planned folding portion are formed at positions spaced apart from the edge of the base by a predetermined distance. When performing the bending, it is possible to prevent the base edge portion of the bent portion from being broken.

  Here, in the present invention, as a process of weakening the bending strength of only the part to be bent, in addition to a method of processing a plurality of recesses along the part to be bent, (1) a part to be bent by machining or etching is used. A method of machining a plurality of through holes at a predetermined pitch, (2) a method of machining one continuous groove (groove) along a portion to be bent by machining or etching, or (3) bending A method of making the bending strength of the portion to be bent weaker than other portions by irradiating the laser beam along the planned portion and annealing the portion to be bent may be adopted.

  The manufacturing method of the present invention is a manufacturing method of a flexible die in which a plurality of recesses are processed at a predetermined pitch along a portion to be bent at a base end portion, and a photoresist film is formed on the front surface and the back surface of a metal plate, respectively. Then, by exposing and developing the photoresist film on the front and back surfaces of the metal plate, a resist pattern is formed on the surface of the metal plate corresponding to the forming portion of the press cutting blade, and on the back surface of the metal plate. A resist pattern having openings at positions corresponding to the plurality of recesses is formed, and then the metal plate is etched using the resist patterns on the front and back surfaces of the metal plate as a mask. When the amount corresponding to the depth is reached, the etching is stopped once, and the recess formed on the back surface of the metal plate by this etching is etched into the etching solution. While adhering a masking tape to al protection, after forming a protrusion projecting from the base and the base by performing side etching is characterized by subjecting the cutting edge machining on the projection.

  As described above, the depth of the concave portion can be accurately controlled by first performing the etching of the concave portion on the back surface of the base, so that the accuracy and workability of bending the base end portion can be improved.

  Here, the present invention can be applied not only to a flexible die (rotary die) used by attaching to a die roller such as a magnet roller, but also to a flexible die (flat die) used by attaching to a flat anvil base. It is. Moreover, since the flexible die of the present invention has a structure in which the base end is bent and the bent piece is fixed, the flexible die can also be applied to a die roller and an anvil base not provided with a magnet.

  According to the flexible die of the present invention, it is possible to accurately and easily bend the both ends of the base on which the pressing blade is formed, and to make the bending angle an acute angle. In this case, the positioning can be performed with high accuracy, and processing such as punching can always be performed accurately. Furthermore, workability when the flexible die is mounted on the magnet roller is also improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a perspective view showing an example of a flexible die of the present invention. FIG. 2 is a perspective view showing a state where both ends of the flexible die are bent.

  The flexible die 1 of this example is a rotary die that is applied to a rotary processing apparatus 200 as shown in FIG. 9 and the like, and the pressing blade 3 is formed in a predetermined pattern on one side of the flexible base 2 (square square rectangular pattern). It is formed with. Further, protrusions 4 and 4 for positioning and fixing are formed at both ends of the flexible base 2 (ends in the rotation direction of the magnet roller 110 shown in FIG. 12). The flexible base 2 in the area surrounded by the press cutting blade 3 is formed with air holes 5.

  As shown in FIG. 2, the flexible die 1 having the above structure is formed by bending both ends of the flexible base 2 to form bent pieces 2a and 2a, and then bending the flexible die 1 in the same manner as in the embodiment shown in FIG. The pieces 2a and 2a are attached to the magnet roller 110 by fitting them into the grooves 111 and 111 (see FIG. 12) of the magnet roller 110, respectively. In the flexible die 1 of this example, as shown in FIG. 2, a plurality of rectangular recesses 6... 6 are fixed along the planned folding portions (planned folding lines) M at each end of the flexible base 2 on the back surface (the surface opposite to the surface on which the pressing blade 3 is formed). It is characterized in that it is formed with a pitch of.

  In this way, if a plurality of concave portions 6... 6 are formed in advance in the planned bending portion M of the flexible base 2, the bending strength of the planned bending portion M will be weaker than other portions, so a strong bending force can be obtained. The operator can bend it by hand without any need. Thereby, for example, when mounting on a magnet roller, it is possible to adopt a usage in which an operator bends the end of the flexible base 2. Furthermore, in this case, since it is possible to collect, transport and store the end of the flexible die 1 without bending, the space required for transporting and storing can be greatly reduced.

  Further, if the concave portions 6... 6 are formed in the planned bending portion M of the flexible base 2 so that the bending strength of only the planned bending portion M is weakened, the sharp bending without swelling in the vicinity of the bending position (corner). Processing becomes possible. As a result, when the flexible die 1 is mounted on the magnet roller, the “floating of the base” does not occur in the vicinity of the bending position of the flexible base 2, so that accurate machining can always be realized.

  Further, the concave portions 6... 6 of the planned bending portion M can be formed with high accuracy by a manufacturing method described later, and the accuracy of the bending position with respect to the pressing blade 3 can be increased. Positioning when mounting on a roller (not shown) is facilitated.

  Further, as shown in FIG. 3, the recesses 6 at both ends of the recess group formed along the planned bending portion M are formed at positions spaced by a predetermined distance D from the edge of the flexible base 2. When the end portion of the flexible base 2 is bent, the base end edge portion of the bent portion can be prevented from cracking. In addition, although the space | interval D provided between the edge of the flexible base 2 and the recessed part 6 is based also on the thickness of the flexible base 2, D = 1-2 mm is suitable.

  Here, as shown in FIG. 3, when a plurality of concave portions 6... 6 are discretely formed at a constant pitch along the planned bending portion M, a portion between the concave portions 6 (at intervals c described later). Since the strength at the time of bending is ensured by the portion (the portion having the same thickness as the base)), it is possible to realize sharp bending while preventing cracking at the bending position.

  Further, the dimensions of the recess 6 will be described. As shown in FIG. 4, when the width a, the length b, and the interval c of the recess 6 are set, the width a is 1.0 to 1.1 mm and the length b is 1.4. It is preferable that it is -1.6mm and the space | interval c is 0.15-0.18mm. Moreover, although it is based on the thickness of the flexible base 2, about the depth d of the recessed part 6, it is preferable that it is 0.11-0.13 mm. With such a numerical range, it is possible to easily and accurately bend the portion to be bent M while maintaining the strength of the portion to be bent M of the flexible base 2. And even if it bends at an acute angle, a crack does not occur at the folding position.

  The shape of the recess 6 is not limited to a quadrangle, and may be any other shape such as a circle or an ellipse.

-Manufacturing method-
Next, an example of a method for manufacturing the flexible die shown in FIGS. 1 and 3 will be described with reference to FIGS.

  (1) As shown in FIG. 7, a photomask (negative film) 12 having an exposure pattern 12 a corresponding to each shape of the protrusion 4 on both ends of the pressing blade 3 and the flexible base 2 in FIG. 1 is made in advance. . Further, as shown in FIG. 8, a photomask (positive film) 16 having an exposure pattern 16a having a shape corresponding to the recesses 6.

  (2) As shown in FIG. 5A, a photoresist is uniformly applied to the surface of the metal plate 11, and further, a photoresist is uniformly applied to the back surface of the metal plate 11. Photoresist films 13 and 15 are formed on the front and back surfaces, respectively.

  (3) As shown in FIG. 5B, a photomask (negative film) 12 (see FIG. 7) is placed and positioned on the photoresist film 13 on the surface of the metal plate 11, and the back surface of the metal plate 11 is also positioned. The photomask (positive film) 16 (see FIG. 8) is disposed and positioned on the photoresist film 15. The photomask 12 on the front side and the photomask 16 on the back side of the metal plate 11 are aligned with each other with the resist mark as a reference, and one end of the photomasks 12 and 16 is joined with an adhesive tape 17. To do.

  (4) The photoresist films 13 and 15 on the front and back of the metal plate 11 are exposed and developed to form a resist pattern 13a and resist patterns 15a having openings 15b... 15b at positions corresponding to the plurality of recesses 6. Are formed (FIG. 5C).

  (5) Etching of the metal plate 11 is started using the resist patterns 13a and 15a on the front and back sides of the metal plate 11 as a mask, and the etching is stopped once when the progress of the etching reaches an amount corresponding to the depth d of the recess 6. (FIG. 5D). By this first etching, a plurality of recesses 6... 6 are formed at a constant pitch on the back surface of the flexible base 2 at positions corresponding to the portions M to be bent. As described above, since the depth of the concave portion 6 can be accurately controlled by performing the etching of the concave portion 6 first, the folding accuracy and workability when bending the end portion of the flexible base 2 are improved. Can do.

  (6) A masking tape 18 is attached to the back surface of the metal plate 11 to protect the recesses 6... 6 formed by the previous etching against the etching solution (FIG. 5E). Start etching. The etching is stopped when the progress of this second etching reaches a predetermined depth ([depth of the cutting blade 3] − [depth considering the depth of the recess 6]). By such etching, as shown in FIG. 5 (F), a flexible base 2 and a trapezoidal protrusion (projection) 10 having a trapezoidal cross section are formed, and protrusions having a trapezoidal cross section are formed at both ends of the flexible base 2, respectively. Portions (projections) 14 and 14 are formed. Note that the masking tape 18 is peeled off after the etching is completed.

  (7) Using an NC processing machine, as shown in FIGS. 6A to 6C, both side surfaces of the trapezoidal projection 10 corresponding to the pressing blade 3 are formed with a conical cutting tool 21. By cutting and performing cutting edge processing, a rectangular pattern pressing blade 3 as shown in FIG. 1 is obtained. The trapezoidal protrusions 14 and 14 (corresponding to the protrusions 4 and 4) at both ends of the flexible base 2 may be machined or left in an etching completed state. Good.

  (8) Using a wire electric discharge machining apparatus, the rectangular air holes 5.. 5 are machined in the flexible base 2 in the region surrounded by the rectangular cutting blade 3 as shown in FIG. 1 and FIG. Such a flexible die 1 is obtained. The resist patterns 13a and 15a remaining on the upper surface side and the back surface side of the flexible base 2 are removed after the air holes 5 are processed or after the cutting edge processing described above.

  Here, in the above example, the air holes 5... 5 are processed by wire electric discharge machining after the etching process is completed, but may be formed simultaneously in the above-described etching process.

  In the above example, the concave portion 6 of the portion M to be bent is processed by etching. However, the present invention is not limited to this, and the concave portion 6 may be formed by fine machining. The recess 6 is not limited to the back surface of the flexible base 2 and may be formed on the surface of the flexible base 2 (formation surface of the press cutting blade 3). Furthermore, instead of the concave portion 6, a plurality of through holes may be formed along the planned bending portion M so that the bending strength of the planned bending portion M is weaker than that of the other portions. In this case, the through hole processing method may be either etching or micromachining.

  Further, as a method of making the bending strength of the part M to be bent weaker than other parts, for example, a method of processing one continuous groove (groove) along the part to be bent by machining or etching, or A method of making the bending strength of the part to be bent weaker than that of the other part by irradiating the laser beam along the part to be bent and annealing the part to be bent can be mentioned.

  In the above example, a flexible die having a rectangular cutting line (quadrature) is described. However, the present invention is not limited to this, and a triangle, a round shape, a pattern such as an animal / animation character, or a floral pattern is used. It can also be applied to various flexible dies that cut complex shapes such as patterns and characters.

  INDUSTRIAL APPLICABILITY The present invention is effectively used to improve the alignment / mountability to a magnet roller in a flexible used for punching of various sheet materials such as punching of a paper sheet or a plastic sheet or a half cut. be able to.

It is a perspective view which shows an example of the flexible die | dye of this invention. It is a perspective view which shows the state which bent both ends of the flexible die of FIG. It is a reverse view of the flexible die | dye of FIG. It is a figure which shows the dimension of the recessed part formed in the edge part of a flexible base. It is a figure which shows typically an example of the manufacturing method of the flexible die of FIGS. 1-3. It is a figure which shows typically an example of the manufacturing method of the flexible die of FIGS. 1-3. It is a figure which shows typically the photomask used for the manufacturing method of FIG. It is a figure which shows typically the photomask used for the manufacturing method of FIG. It is a perspective view which shows a part of rotary processing apparatus typically. It is a front view which shows typically an example of a flat plate press apparatus. It is sectional drawing which shows the structure of the conventional flexible die. It is sectional drawing which shows the state which attached the flexible die | dye to the magnet roller. It is a figure which shows typically the structure of the bending machine which bends the edge part of a flexible die. It is a figure which shows the problem which arises when the conventional flexible die | dye is mounted | worn with a magnet roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible die 2 Flexible base 2a Bending piece 3 Pressing blade 4 Projection 5 Air hole 6 Recessed part M Bending part (bending plan line)
110 Magnet roller 111 Groove

Claims (3)

  A pressing die with a predetermined pattern is formed on one side of a base made of an elastic material, and is a flexible die that is used by bending an end portion of the base, and the portion to be bent is located at a portion to be bent at the base end portion. A flexible die characterized in that the bending strength is weaker than other parts.   A plurality of recesses are processed at a predetermined pitch along the planned bending portion of the base end, and the recesses at both ends of the recess group formed along the planned bending portion are respectively the ends of the base. The flexible die according to claim 1, wherein the flexible die is formed at a position spaced from the edge by a predetermined distance. 3. The method of manufacturing a flexible die according to claim 2, wherein a photoresist film is formed on each of a front surface and a back surface of the metal plate, and the photoresist film on the front surface and the back surface of the metal plate is exposed and developed. Forming a resist pattern on the surface of the plate corresponding to the forming portion of the press cutting blade, and forming a resist pattern having openings at positions corresponding to the plurality of recesses on the back surface of the metal plate; Etching of the metal plate is performed using the resist pattern on the front and back surfaces of the metal plate as a mask, and when the progress of the etching reaches an amount corresponding to the depth of the recess, the etching is stopped once. Etching is performed again with a masking tape that protects the recess formed on the back of the plate from the etchant. After forming the serial based projection projecting from the base, the manufacturing method of the flexible die, characterized in that subjecting the cutting edge machining on the projection.

Images