JP2011061058A - Die for flexible printed circuit board and method of manufacturing flexible printed circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die for a flexible printed circuit board that facilitates manufacture and has high convenience, and to provide a method of manufacturing the flexible printed circuit board. <P>SOLUTION: The die 1 for the flexible printed circuit board is the die in which the flexible printed circuit board is carved from a sheet-like base material. The die 1 includes: a plurality of thin metal sheets 2 having rims 21 shaped in a shape adapted to the outer shape of the flexible printed circuit board; a positioning member 3 for positioning a plurality of overlapped thin metal sheets 2 so that rims 21 are aligned with the thickness direction; and a pressing member for pressing the sheet-like base material against the rim 21 of the top thin metal sheet 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a flexible wiring board mold and a method for manufacturing a flexible wiring board, and more particularly to a technique for cutting out a flexible wiring board from a sheet-like base material.

  Flexible wiring boards such as FPC (Flexible Printed Circuit) and FFC (Flexible Flat Cable) are cut out one by one from a sheet-like base material in which circuit conductors and resin films are laminated. As one of means for cutting out such a flexible wiring board, a pinnacle type (corrosion blade type) is known. In this pinnacle mold, the cutting edge is formed by etching on the surface of the thick metal plate, and the periphery of the cutting edge is excavated to ensure the height of the cutting edge.

  However, the manufacture of the pinnacle mold requires etching and excavation, and thus there is a problem that the manufacture is complicated and takes time. In addition, when the cutting edge becomes dull and cannot be used, there is another problem that a pinnacle mold must be newly manufactured.

  The present invention has been made in view of the above circumstances, and has as its main object to provide a flexible wiring board mold and a flexible wiring board manufacturing method that are easy to manufacture and highly convenient. To do.

  In order to solve the above-mentioned problems, a flexible wiring board mold of the present invention is a flexible wiring board mold for cutting out a flexible wiring board from a sheet-like base material, A plurality of metal thin plates having edges shaped into shapes corresponding to the outer shape, a positioning member that positions the plurality of stacked metal thin plates so that the edges are aligned in the thickness direction, and the uppermost metal thin plate And a pressing member that presses the sheet-like matrix on the edge.

  Moreover, the manufacturing method of the flexible wiring board of this invention is a manufacturing method of a flexible wiring board which cuts out a flexible wiring board from a sheet-like base body, Comprising: It respond | corresponds to the external shape of the said flexible wiring board. A plurality of thin metal plates having edges shaped into shapes are positioned so that the edges are aligned in the thickness direction, and the sheet-like matrix is pressed against the edges of the uppermost thin metal plate. .

  According to the present invention, the edge of the uppermost thin metal plate is the cutting edge, and the height of the cutting edge is secured by stacking a plurality of thin metal plates, so that the manufacture is easy. Even if the cutting edge is blunt, a new cutting edge can be used simply by removing or replacing the uppermost thin metal plate, which is highly convenient.

  Moreover, in one Embodiment of this invention, the opening of the shape corresponding to the external shape of the said flexible wiring board is formed in the said thin metal plate, and the inner edge of the said opening is made into the said edge. According to this, all the outer edges of the flexible wiring board are cut off from the sheet-like matrix.

  Moreover, in one Embodiment of this invention, the thickness of the several said thin metal plate piled up is thicker than the said sheet-like base material. According to this, a sheet-like base material can be torn apart more reliably.

  Moreover, in one Embodiment of this invention, the said positioning member is comprised in pillar shape, and is inserted in the positioning hole of each said metal thin plate. According to this, all the metal thin plates are positioned by inserting the positioning members into the positioning holes of the respective metal thin plates.

  Moreover, in one Embodiment of this invention, it further has the positioning pin inserted in the positioning hole formed in the said sheet-like base material. According to this, when cutting a flexible wiring board, a sheet-like base material is positioned.

  Moreover, in one Embodiment of this invention, the insertion hole into which the said positioning pin is inserted is formed in each said metal thin plate. According to this, the positioning pin for positioning a sheet-like base material can be utilized also for positioning of each metal thin plate.

  Moreover, in one Embodiment of this invention, it further has the extrusion pin which extrudes the said flexible wiring board cut out from the said sheet-like base material from the inside of the hole part formed by the said opening continuing. According to this, the flexible wiring board cut out from the sheet-like base material and dropped into the hole is pushed out.

  In one embodiment of the present invention, at least the edge of the uppermost thin metal plate has a shape protruding in the thickness direction to the side on which the sheet-like matrix is pressed. According to this, a sheet-like base material can be torn apart more reliably. In particular, in this case, the sheet-like base material can be torn without having to push the pressing member into the hole formed by the continuous opening.

  In one embodiment of the present invention, at least the edge of the uppermost thin metal plate has a shape in which the side on which the sheet-like matrix is pressed protrudes in the in-plane direction from the opposite side. According to this, a sheet-like base material can be torn apart more reliably.

  Moreover, in one Embodiment of this invention, the said press member is comprised so that fitting to the hole part formed by the said opening continuing is continued. According to this, the sheet-like mother body can be more reliably torn by inserting the pressing member that presses the sheet-like mother body into the hole.

  In one embodiment of the present invention, the opening is formed by etching. According to this, it is easy to form a plurality of thin metal plates in which openings having the same shape are formed by using a mask having the same shape.

  The flexible wiring board mold of the present invention is a flexible wiring board mold for cutting out a flexible wiring board from a sheet-like base material, and has a shape corresponding to the outer shape of the flexible wiring board. The metal thin plate is formed so that the opening of the metal thin plate is included in the opening of the plate member, and the opening of the metal thin plate is included in the opening of the plate member. A positioning member for positioning in a state of being overlapped on the plate member, and a pressing member for pressing the sheet-like base material at an edge of the opening of the thin metal plate are provided.

  According to the present invention, the edge of the thin metal plate is the cutting edge, and the height of the cutting edge is secured by stacking the thin metal plate on the plate member, so that the manufacture is easy. Even if the cutting edge is blunt, a new cutting edge can be used simply by removing or replacing the thin metal plate, which is highly convenient.

It is a perspective view of the metal mold | die for flexible wiring boards which concerns on one Embodiment of this invention. It is a perspective view explaining cutting out of the flexible wiring board by the said mold for flexible wiring boards. It is a perspective view of the metal thin plate contained in the said metal mold | die for flexible wiring boards. It is a perspective view of the base plate contained in the said mold for flexible wiring boards. It is a perspective view of the extrusion pin contained in the said metal mold | die for flexible wiring boards. It is sectional drawing to which the principal part of the said metal mold | die for flexible wiring boards was expanded. It is a perspective view of the metal mold | die for flexible wiring boards which concerns on one Embodiment of this invention. It is a perspective view of the base plate contained in the said mold for flexible wiring boards. It is sectional drawing to which the principal part of the said metal mold | die for flexible wiring boards was expanded. It is a cross-sectional part which concerns on the modification of this invention. It is a cross-sectional part which concerns on the modification of this invention.

  Embodiments of a mold for a flexible wiring board and a method for manufacturing a flexible wiring board according to the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view of a flexible wiring board mold 1A according to the first embodiment. FIG. 2 is a perspective view for explaining cutting out of the flexible wiring board by the flexible wiring board mold 1A. FIG. 3 is a perspective view of the thin metal plate 2. FIG. 4 is a perspective view of the base plate 7A. FIG. 5 is a perspective view of the push pin 6. FIG. 6 is an enlarged cross-sectional view of a main part of the flexible wiring board mold 1A.

  As shown in FIGS. 1 and 2, a flexible wiring board mold 1A includes a plurality of thin metal plates 2 stacked on a base plate 7A, a positioning member 3 for positioning the thin metal plates 2, and a sheet. Positioning pin 5 for positioning the base 90, the pressing member 4 that presses the sheet base 90 against the thin metal plate 2, and an extrusion pin that pushes out the flexible wiring board cut out from the base 90 6 are provided.

  As shown in FIG. 3, the metal thin plate 2 is a metal thin plate formed in a square shape, and a substantially rectangular opening 21 a penetrating in the thickness direction is formed at the center thereof. The opening 21 a has the same shape as the outer shape of the flexible wiring board to be cut out from the sheet-like base body 90. That is, the edge (inner edge) 21 of the opening 21 a is shaped as a closed curve having the same shape as the outer shape of the flexible wiring board to be cut out from the sheet-like base body 90. The thin metal plate 2 has a circular positioning hole 23a into which the positioning member 3 is inserted and a circular insertion hole 25a into which the positioning pin 5 is inserted in a predetermined positional relationship with the opening 21a. Is formed. Specifically, the positioning holes 23a are formed at four corners of the thin metal plate 2, and the insertion holes 25a are formed at both sides in the longitudinal direction of the opening 21a. These openings 21a, positioning holes 23a, and insertion holes 25a are formed by etching.

  As shown in FIGS. 1 and 2, the plurality of thin metal plates 2 have the same outer shape, and are stacked on the base plate 7 </ b> A so that each side is aligned. The opening 21a, the positioning hole 23a, and the insertion hole 25a are formed in the same positional relationship in each metal thin plate 2, and are aligned in the thickness direction when these metal thin plates 2 are stacked on the base plate 7A. Such a plurality of thin metal plates 2 can be easily and quickly manufactured by etching a thin metal plate made of the same thickness and the same material under the same mask and the same conditions. However, the present invention is not limited to this, and the metal thin plate 2 may be manufactured by cutting. Note that the thickness of one metal thin plate 2 is, for example, about 0.1 mm. In the present embodiment, seven metal thin plates 2 are stacked, so the total thickness is, for example, about 0.7 mm. The On the other hand, the thickness of the sheet-like base body 90 is, for example, about 0.2 to 0.3 mm, and is smaller than the total thickness.

  A columnar positioning member 3 extending in the vertical direction is inserted into the positioning holes 23a of the plurality of thin metal plates 2 stacked on the base plate 7A. These positioning members 3 are inserted into the positioning holes 23a of the thin metal plate 2 together with the positioning holes 73a (see FIG. 4) formed in the base plate 7A. By inserting the positioning member 3 into the positioning holes 23a and 73a in this way, the plurality of thin metal plates 2 are positioned together with the base plate 7A in a state where the edges 21 of the openings 21a are aligned in the thickness direction.

  The positioning pins 5 extending in the vertical direction are inserted into the insertion holes 25a of the plurality of thin metal plates 2 stacked on the base plate 7A. These positioning pins 5 are provided integrally with the base plate 7A (see FIG. 4), and have a length protruding upward from the uppermost thin metal plate 2. The plurality of thin metal plates 2 are also positioned by inserting the positioning pins 5 into the insertion holes 25a as described above.

  An upper end portion of the positioning pin 5 that protrudes upward from the uppermost thin metal plate 2 is inserted into a positioning hole 95 a formed in the sheet-like base body 90. These positioning holes 95a are formed in a predetermined positional relationship with respect to a portion of the sheet-like base body 90 that is cut out as a flexible wiring board. Specifically, the positioning holes 95a are provided on both sides in the longitudinal direction of each portion cut out as a flexible wiring board in the sheet-like base body 90, and the positioning pins 5 are inserted into the pair of positioning holes 95a. Then, a portion cut out as a flexible wiring board positioned between them is positioned on the opening 21a of the thin metal plate 2.

  The pressing member 4 is configured as a pressing mold that can be fitted into a hole formed by a series of openings 21 a of a plurality of thin metal plates 2. The pressing member 4 has a cross section having the same shape as the opening 21a (that is, the same shape as the flexible wiring board to be cut out from the sheet-like base body 90), and is configured to be movable in the vertical direction. When the pressing member 4 moves downward and the sheet-like base body 90 is pressed against the edge 21 of the uppermost thin metal plate 2, the flexible wiring board is cut out from the sheet-like base body 90 by the edge 21.

  An extrusion pin 6 configured to be movable in the vertical direction is provided in a hole portion formed by connecting the openings 21a of the plurality of thin metal plates 2. These push pins 6 protrude upward from the base plate 7A located at the bottom of the hole. Specifically, the push pin 6 is provided integrally with the support plate 67 (see FIG. 5), and is inserted into the insertion hole 76a (see FIG. 6) formed in the center of the base plate 7A from below. Inserted. The flexible wiring board cut out from the sheet-like base body 90 and dropped into the hole is pushed up by the push pin 6 and discharged to the outside.

  Next, the shape of the edge 21 of the metal thin plate 2 will be described in detail. FIG. 6 is an enlarged cross-sectional view of the vicinity of the edge 21 of the thin metal plate 2. As shown in FIG. 6, a protrusion 29 is formed on the edge 21 of the uppermost metal thin plate 2 x out of the plurality of stacked metal thin plates 2 so as to protrude above the surrounding thin portion 28. . When the sheet-like base body 90 is pressed downward by the pressing member 4, the sheet-like base body 90 comes into contact with the protruding portion 29 and starts to tear from that portion. For this reason, it is possible to cut out the flexible wiring board from the sheet-like base body 90 without pressing the pressing member 4 deeply into the hole formed by the continuous openings 21 a of the plurality of thin metal plates 2. Such an uppermost thin metal plate 2x can be manufactured by two-stage etching including etching for forming the opening 21a and etching for forming the thin portion 28. Further, the taper formed on the edge 21 of the other thin metal plate 2 is naturally generated by etching when the opening 21a is formed.

[Second Embodiment]
FIG. 7 is a perspective view of a flexible wiring board mold 1B according to the second embodiment. FIG. 8 is a perspective view of the base plate 7B. FIG. 9 is an enlarged cross-sectional view of a main part of the flexible wiring board mold 1B. In addition, about the structure which overlaps with the said embodiment, detailed description is abbreviate | omitted by attaching | subjecting the same number.

  In this embodiment, the rectangular discharge hole 70a is provided in the center part of the base plate 7B, and the extrusion pin 6 as in the above embodiment is not provided. For this reason, the hole formed by connecting the openings 21a of the plurality of thin metal plates 2 penetrates in the vertical direction. When the flexible wiring board is cut out from the sheet-like base body 90 by the edge 21 of the uppermost thin metal plate 2, the flexible wiring board passes through the hole and is discharged downward.

  Next, the shape of the edge 21 of the metal thin plate 2 will be described in detail. FIG. 9 is an enlarged cross-sectional view of the vicinity of the edge 21 of the thin metal plate 2. As shown in FIG. 9, the edge 21 of each metal thin plate 2 is tapered. The taper may be naturally generated by etching when the opening 21a is formed, or may be formed positively. Among these, the uppermost thin metal plate 2 is arranged so that the side projecting in the in-plane direction is located on the upper side, and the other thin metal plate 2 is arranged so that the side projecting in the in-plane direction is located on the lower side. Has been placed. According to this, in the uppermost thin metal plate 2, the sharp pointed side of the edge 21 is positioned upward, so that when the sheet-like base body 90 is pressed against the edge 21, tearing tends to occur.

  In addition, it is not restricted only to the uppermost metal thin plate 2, The other metal thin plate 2 may also be arrange | positioned in the direction where the side protruded in the surface direction is located in an upper side. In this case, immediately after the uppermost thin metal plate 2 is removed, the edge 21 of the new uppermost thin metal plate 2 can be used as a cutting edge. Further, the shape of the edge 21 is not limited to the taper, and may be a step shape in which the upper side protrudes in the in-plane direction from the lower side.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art.

  The shape of the opening 21a formed in the metal thin plate 2 depends on the shape of the flexible wiring board cut out from the sheet-like base body 90, and is not limited to the illustrated shape. Further, the cutting of the flexible wiring board is not limited to the edge 21 of the opening 21a, but the edge of the missing portion where a part of the metal thin plate 2 is missing, such as a notch formed in the metal thin plate 2, is used. Alternatively, the outer edge of the thin metal plate 2 may be used. There is no particular limitation as long as the edge has a shape corresponding to the outer shape of the flexible wiring board cut out from the sheet-like base body 90.

  Further, as shown in FIG. 10A, a plate member 8 having an opening 8a having a size capable of including the opening 21a of the metal thin plate 2 is provided, and the opening 21a of the metal thin plate 2 is included in the opening 8a of the plate member 8. As described above, the metal thin plate 2 may be positioned in a state of being overlapped on the plate member 8, and the flexible wiring board may be cut out from the sheet-like base body 90 at the edge 21 of the opening 21 a of the metal thin plate 2. In this case, the plate member 8 plays a role of ensuring the height of the edge 21 of the thin metal plate 2 as the cutting edge. When the edge 21 of the metal thin plate 2 is blunted, the metal thin plate 2 may be replaced. As shown in FIG. 10B, the opening 21b of the thin metal plate 2 (corresponding to the plate member) below the uppermost thin metal plate 2 is formed so as to include the opening 21a of the uppermost thin metal plate 2. You may arrange so that the edge 21 of the thin plate 2 may narrow toward upper direction.

  DESCRIPTION OF SYMBOLS 1 Mold for flexible wiring boards, 2 metal thin plate, 21 edge, 21a opening, 21b opening, 23a positioning hole, 25a insertion hole, 2x uppermost metal thin plate, 28 thin part, 29 protrusion part, 3 positioning member, 4 Press member, 5 positioning pin, 6 extrusion pin, 67 support plate, 7 base plate, 73a positioning hole, 76a insertion hole, 70a discharge hole, 8 plate member, 8a opening, 90 sheet-shaped base, 95a positioning hole.

Claims (13)

A flexible wiring board mold for cutting out a flexible wiring board from a sheet-like base material,
A plurality of thin metal plates having edges shaped into shapes corresponding to the outer shape of the flexible wiring board;
A positioning member for positioning the plurality of stacked thin metal plates so that the edges are aligned in the thickness direction;
A pressing member that presses the sheet-like matrix on the edge of the uppermost metal sheet;
A mold for a flexible wiring board, comprising: An opening having a shape corresponding to the outer shape of the flexible wiring board is formed in the metal thin plate,
The inner edge of the opening is the edge,
The mold for flexible wiring boards according to claim 1. The stacked metal thin plates are thicker than the sheet-shaped matrix.
The mold for flexible wiring boards according to claim 1. The positioning member is configured in a columnar shape, and is inserted into the positioning hole of each metal thin plate.
The mold for flexible wiring boards according to claim 1. It further comprises a positioning pin inserted into a positioning hole formed in the sheet-like matrix.
The mold for flexible wiring boards according to claim 1. An insertion hole into which the positioning pin is inserted is formed in each of the metal thin plates.
The mold for flexible wiring boards according to claim 5. Further comprising an extruding pin for extruding the flexible wiring board cut out from the sheet-shaped base body from the inside of the hole formed by the continuous opening.
The mold for flexible wiring boards according to claim 2. At least the edge of the uppermost thin metal plate has a shape protruding in the thickness direction to the side on which the sheet-like matrix is pressed,
The mold for flexible wiring boards according to claim 1. At least the edge of the uppermost thin metal plate has a shape in which the side on which the sheet-like matrix is pressed projects in the in-plane direction from the opposite side.
The mold for flexible wiring boards according to claim 1. The pressing member is configured to be able to fit into a hole formed by the opening being continuous.
The mold for flexible wiring boards according to claim 2. The opening is formed by etching.
The mold for flexible wiring boards according to claim 2. A flexible wiring board mold for cutting out a flexible wiring board from a sheet-like base material,
A thin metal plate in which an opening having a shape corresponding to the outer shape of the flexible wiring board is formed;
A plate member formed with an opening having a size capable of including the opening;
A positioning member that positions the thin metal plate in a state of being stacked on the plate member so that the opening of the thin metal plate is included in the opening of the plate member;
A pressing member that presses the sheet-like matrix on the edge of the opening of the metal thin plate;
A mold for a flexible wiring board, comprising: A method for producing a flexible wiring board, wherein a flexible wiring board is cut out from a sheet-like base material,
Positioning a plurality of metal thin plates having edges shaped into shapes corresponding to the outer shape of the flexible wiring board so that the edges are aligned in the thickness direction;
Press the sheet-shaped base against the edge of the uppermost metal sheet,
A method for producing a flexible wiring board.

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