JP3027888B2 - Die stamping mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die stamp die for cutting only a metal foil of an FPC substrate into a predetermined circuit pattern.

[0002]

2. Description of the Related Art Conventionally, when a flexible circuit board is manufactured by a die stamping method, as shown in FIG.
A metal foil 3 coated with a thermosetting or thermoplastic adhesive 2 is overlaid on the upper surface of the base film 1 to form an FPC [Fl
exible Printed Circuit] substrate 4
As shown in FIG. 18, F is formed by a mold 7 having a blade 5 and a press contact surface 6 having a shape corresponding to a predetermined circuit pattern.
The metal foil 3 of the PC substrate 4 is punched and cut.

At this time, the mold 7 is pre-heated,
As shown in FIG. 18, when the press contact surface 6 is pressed against the metal foil 3, the adhesive 2 just below the press contact surface 6 via the metal foil 3 is formed.
Is hardened, and the metal foil 3 in the portion where the adhesive 2 is hardened is temporarily bonded to the base film 1, and the metal foil 3 in the portion where the adhesive 2 is not hardened remains detachable from the base film 1. .

[0004] Next, as shown in FIG. 19, the metal foil 3 in a portion where the adhesive 2 is not cured is peeled off and removed, and a predetermined circuit pattern cut by a mold 7 is formed on the base film 1. The metal foil 3 remains, and the adhesive 2 in the lower layer of the remaining metal foil 3 is further heated and hardened, the metal foil 3 is completely fixed to the base film 1, and the cover lay film is further adhered to the upper surface. Thus, the manufacture of the flexible circuit board having the predetermined circuit pattern is completed.

[0005] A method for manufacturing such a flexible circuit board is also described, for example, in Japanese Patent Application Laid-Open No. Hei 3-242993.

[0006]

However, when a flexible circuit board is manufactured by the die stamping method as described above, only the metal foil 3 must be punched by the die stamping die 7, so that a die having high dimensional accuracy is required. In order to obtain the stamping die 7, it is necessary to cut the blade 5 from a steel material by milling and then to sharpen the blade 5 by hand, which increases the manufacturing cost and increases as the circuit pattern becomes more complicated. There is a problem.

If the circuit pattern is changed, the die stamping die cannot be used, so that a new die stamping die must be re-created, resulting in enormous labor and cost. This leads to an increase in the cost of the flexible circuit board, and ultimately, no cost merit can be obtained unless the flexible circuit board is mass-produced.

The present invention has been made in order to solve the above problems, and has as its object to provide an inexpensive die stamp die that can easily cope with various circuit patterns.

[0009]

A die stamping die according to claim 1 of the present invention is used when manufacturing a flexible circuit board by a die stamping method, and is formed by attaching a metal foil to a base film. The above-mentioned metal foil of the FPC substrate is provided with a plurality of types of flexible
A die stamp die for cutting corresponding to a circuit pattern of a desired flexible circuit board out of a plurality of flexible circuit boards.
It is formed corresponding to each partial area of each circuit pattern.
Is provided with a selectively detachable multiple blade type portion that will be inserted into the base, the desired from among the plurality of blade-shaped portion
The number corresponding to the circuit pattern of the flexible circuit board
Select the blade type part and arrange it in parallel according to its circuit pattern
It is characterized in that it is assembled in a state and detachably inserted into the base . The die according to claim 2 of the present invention.
In the stamping die, the base is formed in a substantially cylindrical shape,
Each of the blade mold portions is detachably inserted around the outer periphery of the base portion.
And each of the plurality of types of flexible
Of the metal foil of each of the circuit patterns of the xivable circuit board
A plurality of blade molds formed in a blade width corresponding to each width.
Some of them are selected and parallel to the axial direction of the base
The die stamping die is inserted and attached to the outer periphery of the substrate.
Each is formed in an annular shape so that it can be detachably inserted into,
Between the adjacent blade mold portions according to the circuit pattern
Each of them is interposed to adjust the separation width between each blade
Number of spacers, inserted parallel to the axial direction of the base
A plurality of the blade mold portions and the spacer so as to sandwich the spacer.
Further provided are stoppers screwed to both ends of the base.
It is characterized by. A die according to claim 3 of the present invention.
In the stamping die, the base is formed in a plane quadrilateral, and
A quadrangular concave part with a predetermined depth in plan view
And each of the blade mold portions is formed with a flat portion of the concave portion of the base portion.
Formed to a length equivalent to the length of one side of a square shape in plan view
And each of the plurality of types of flexible circuit boards
Formed with a blade width corresponding to each width of the metal foil of the circuit pattern
Some of the plurality of blade mold portions are selected.
And is removably inserted into the concave portion of the base portion.
The thickness of the blade mold portion is such that the blade of each blade mold portion is
Is set to protrude from the upper surface of the
The pump mold has a square shape in plan view of the concave portion of the base.
The length of each side is equal to the length of one side of the
Interposed between the adjacent blade mold parts according to the road pattern
A plurality of spacers for adjusting the separation width between the blade mold portions
Is further provided. Claim of this invention
Item 4. The die stamping die according to Item 4, wherein the base is substantially cylindrical.
And each of the blade mold portions is attached to and detached from an outer periphery of the base portion.
Each is formed in an annular shape so that it can be inserted freely
In addition, the pattern of the blades of each of the blade mold portions is different from that of the plurality of types
For a circuit pattern in a predetermined partial area of a flexible circuit board
The die stamping die formed correspondingly,
Holds a plurality of blade-type parts mounted in parallel to the axial direction of the part
So that the stoppers screwed to both ends of the base
It is characterized in that it is prepared for. Claim 5 of the present invention
In the die stamping die according to the above, the base is a plane square.
A square formed in a plane and having a predetermined depth in the plane.
Concave portions are formed, and each of the blade mold portions is in front of the base portion.
The length of one side of the rectangular shape in plan view of the concave portion
The blade pattern of each of the blade mold portions is formed as described above.
The rotation of a predetermined partial area of a plurality of types of flexible circuit boards
Formed according to the road pattern, and the thickness of each of the blade mold portions.
Is the blade of each blade mold portion the upper surface of the concave portion of the base portion?
It is characterized by being set to protrude. This
The die stamping die according to claim 6 of the present invention,
On the outer periphery of the part, a ridge-shaped flat key parallel to the axial direction of the base
Are formed, and each of the blade mold portions and the spacer
A key groove to be inserted into the flat key of the substrate is formed on the inner circumference of the substrate.
It is characterized by having been achieved.

[0010]

According to the first aspect of the present invention, a plurality of types of frames are provided.
Prepared in advance corresponding to each circuit pattern of the kibble circuit board
Some of the blade mold parts are selected from among the plurality of formed blade mold parts and fixed to the base, so even if the circuit pattern of the flexible circuit board is changed, some of the blade mold parts are replaced. It is possible to cope with this by changing the position of the die and the die, and it is only necessary to prepare the necessary die without the need to recreate the die stamp die as in the past. Die manufacturing costs are greatly reduced. According to a second aspect of the present invention, the base has a substantially cylindrical shape.
And insert each of the annular blades around the base
The flat key on the base side and the key groove on each blade mold section side
The stoppers are firmly tightened from both sides.
And fix each blade to the base.
Key and the key groove on the side of each blade die, the base of each blade
Against rotation, and therefore around the base axis
Cut the metal foil with the blade of each blade.
It becomes possible. In this case, the
Separation width should be easily adjusted with spacers
Is possible. In claim 3 of the present invention, the base is
A plane formed in a plane quadrilateral and having a predetermined depth within the plane
A quadrangular concave portion is formed, and the concave portion of the base is viewed in plan.
A concave part is created for each blade that has the same length as one side of the square.
Easy to replace the blade part just by detachably inserting it into the
Can be In this case, the gap between adjacent blade sections
The width can be easily adjusted with a spacer
Noh. In claims 4 and 5 of the present invention,
Can be changed by exchanging the blade
A plurality of types of flexible circuit boards can be easily manufactured.
According to claim 6 of the present invention, the base is formed in a substantially cylindrical shape.
When inserting each annular blade mold part on the outer periphery of the base,
Engage the flat key on the base side with the key groove on each blade section.
As it is composed, both stoppers are strongly tightened from both sides
Just fix each blade section to the base with the flat key on the base side.
Engagement with the key groove on each blade mold section causes the base of each blade mold section to face
Rotation around the axis of the base is thus prevented.
The metal foil can be cut by the blade of each blade
It becomes possible.

[0011]

FIG. 1 is a sectional view of a first embodiment of a die stamping die according to the present invention, FIG. 2 is a perspective view, FIG. 3 is a partially exploded perspective view, and FIG. Other partial exploded perspective view,
FIG. 5 is a perspective view of the manufactured flexible circuit board.

As shown in FIGS. 1 and 2, a substantially circular base portion is provided.
An axial through hole 11a for inserting a heater is formed at the center of the cylindrical shaft portion 11, and small-diameter portions 11b which are gripped by gripping tools (not shown) are formed at both ends of the shaft portion 11. First to fourth blade mold portions 12a, 12b, 12c, 12d having different blade widths are provided on the large diameter portion 11c between the small diameter portions 11b.
13a, 13b, 13c, 13 with different thicknesses
d and 13e are inserted alternately, and the blade mold portions 12a to 12e are further attached to the end portions of the spacers 13a and 13e located at both ends.
Pillows 14 and 14 slightly larger in diameter than 12d are respectively inserted, and a screw 15 is formed on the outer periphery of the shaft portion 11 corresponding to the boundary between both small diameter portions 11b and both ends of the large diameter portion 11c. A ring-shaped stopper 17 having a female screw 16 is screwed to each of the male screws 15, and the stoppers 17 are used to connect the plurality of blade mold parts 12 a to 12 d, spacers 13 a to 13 e, and pillow part 14 to the shaft part 11.
Is held in a state of being inserted into the large diameter portion 11c.

By the way, the shaft portion 11 is a flat key 18 as shown in FIG. 4 provided on the flat row in the axial direction, each blade-shaped portion 12 a to 12 d, the inner periphery of each spacer 13a~13e and pillow portion 14 As shown in FIG.
A key groove 19 having the same cross-sectional shape as the cross section of the key 18 is formed, and each of the blade mold portions 12a to 12d and each of the spacers 13a to 13e are inserted so that the key 18 is fitted into each key groove 19.
The pillow portion 14 is inserted into the shaft portion 11, and the combination of the key 18 and the key groove 19 prevents rotation of the blade mold portions 12 a to 12 d, the spacers 13 a to 13 e, and the pillow portion 14.

By strongly tightening the stoppers 17 from both sides, the blade mold portions 12a to 12d are fixed to the shaft portion 11 with the spacers 13a to 13e interposed therebetween. The metal foil of the FPC base material is cut by rotating the shaft around the axis of the shaft portion 11, and as shown in FIG.
Metal foils 20a, 20 each having a width corresponding to the blade width of 12d
Flexible circuit board 21 having b, 20c, 20d
Is obtained.

Here, the die stamping die is heated by the heater when the metal foil is cut as in the conventional case.

Further, in order to cope with a change in the circuit pattern of the flexible circuit board 21, each of the blade mold portions 12
In addition to a to 12d and each of the spacers 13a to 13e, a plurality of blade mold portions having different blade widths and a plurality of spacers having different thicknesses are prepared, and a blade mold portion and a spacer that match the changed circuit pattern are selected. By inserting and fixing to the shaft portion 11, flexible circuit boards having different circuit patterns can be manufactured.

Therefore, according to the first embodiment, by preparing a plurality of blade mold portions having different blade widths and spacers having different thicknesses, it is possible to replace the blade mold portion or to change the position of the blade mold portion by changing the spacer. By the change, it is possible to easily cope with various circuit patterns, and it is possible to provide an inexpensive die stamping die without having to recreate the die stamping die unlike the related art.

(Second Embodiment) FIG. 6 is a perspective view of a second embodiment of the present invention, FIG. 7 is a partially exploded perspective view, and FIG. 8 is another partially exploded perspective view.

As shown in the figures, a flat rectangular recess 31a having a predetermined depth is formed on the upper surface of a flat rectangular base 31 which is a base, and a step 31b is formed on the three edges of the concave 31a. And the other peripheral edge is open without a step, and from the opening side without the step, the fifth to eighth blade mold portions 32a, 32b, 32c, and 32c having different blade widths are provided.
Spacers 33a, 33b, 33c having different widths from 32d,
33d are alternately inserted into the concave portions 31a, and the concave portions 31
The two through-holes 34 are provided at the end of the spacer 33d located on one side without the step a of FIG.
5 are inserted into the base 31 and both screws 35 are screwed into the screws 36, respectively.
To 32d are fixed to the base 31 with the spacers 33a to 33d interposed therebetween.

At this time, the thickness of each of the spacers 33a to 33d is the same as the depth of the concave portion 31a,
To 32d are formed to a thickness such that the blade portion protrudes from the upper surface of the concave portion 31a, and the length of each of the blade mold portions 32a to 32d and each of the spacers 33a to 33d is substantially the same as the length of the opening of the concave portion 31a. Is formed.

As in the case of the first embodiment, a plurality of blades having different blade widths other than the blade mold portions 32a to 32d and the spacers 33a to 33d are provided in order to cope with a change in the circuit pattern of the flexible circuit board. It is only necessary to prepare a plurality of spacers having different mold portions and widths, and select a blade mold portion and spacers that match the changed circuit pattern.

Therefore, according to the second embodiment, the same effect as that of the first embodiment can be obtained.

(Third Embodiment) FIG. 9 is a perspective view of a third embodiment of the present invention, FIG. 10 is a partially exploded perspective view, FIG. 11 is another partially exploded perspective view, and FIGS. Is a plan view of a manufactured flexible circuit board, and FIG. 13 is a perspective view of a blade mold portion having a different blade shape.

This embodiment is an example in which a flexible circuit board 41 having a complicated circuit pattern as shown in FIG. 12 is formed. However, in FIG. 12, 42 is a base film, and 43 is a metal foil.

In FIGS. 9 to 11, the same reference numerals as those in FIGS. 1 to 4 indicate the same or corresponding elements, and the difference is that the spacer 13a as in the first embodiment is different.
Ninth and tenth blade mold parts 44a, 44b without using
Are inserted into the shaft portion 11, the pillow portion 14 is inserted from both sides, and the stopper 17 is screwed into the external thread 15 of the shaft portion 11 to be strongly tightened. 44b and the pillow portion 14 are fixed to the shaft portion 11 to form a die stamping die.

At this time, a key groove 19 corresponding to the key 18 of the shaft portion 11 is formed on the inner periphery of the two-edge mold portions 44a and 44b, similarly to the pillow portion 14.

When the die stamping die in the assembled state as shown in FIG. 9 makes one rotation, the metal foil 43 is cut as shown in FIG. 12 to form a flexible circuit board 41 having a predetermined circuit pattern. For example, a circuit pattern of the region A on the right side of the one-dot chain line in FIG.
The B on the left side of the one-dot chain line in FIG.
An area circuit pattern is formed.

Instead of the ninth blade portion 44a, a first blade portion 44c having a blade pattern, that is, a blade pattern different from that shown in FIG.
Flexible circuit board 4 having a circuit pattern as shown in FIG.
In this case, the region B on the left side of the alternate long and short dash line in FIG. 14 is formed by the tenth blade portion 44b, and the region C on the right side is formed by the eleventh blade portion 44c.

Therefore, according to the third embodiment, the same effect as that of the first embodiment can be obtained.

(Fourth Embodiment) FIG. 15 is a perspective view of a fourth embodiment of the present invention, and FIG. 16 is a partial perspective view.

This embodiment is also an example in which a flexible circuit board 41 having the circuit pattern shown in FIG. 12 is formed.

As shown in FIG. 15, a planar rectangular base 51 having a predetermined depth is formed on the upper surface of a planar rectangular base 51 serving as a base portion, and this concave portion is divided into two regions. A twelfth blade pattern portion 52a having a blade pattern for forming the circuit pattern of the region A in FIG. 12 is inserted and has a blade pattern for forming the circuit pattern of the region B in FIG. 12 in the other region. 13th blade mold 52b
Are inserted, and screws 53 are inserted into the through holes at the four corners of each of the two-blade mold portions 52a and 52b, and screwed to the base 51. The two-blade mold portions 52a and 52b are fixed to the base 51.

Then, the metal foil of the FPC substrate is punched and cut by the die stamping die assembled in this manner, thereby forming a flexible circuit board having a circuit pattern as shown in FIG. 14
In the case of forming a flexible circuit board having a different circuit pattern as shown in FIG.
As shown in FIG. 16, a fourteenth blade-shaped portion 52 c having a blade for forming a circuit pattern in a region C in FIG. 14 may be inserted and fixed to the base 51.

Therefore, according to the fourth embodiment, the same effect as that of the first embodiment can be obtained.

It is needless to say that the type of the blade mold is not limited to those of the above embodiments.

[0036]

As described above, according to claim 1 of the present invention.
That, according to the die stamping mold, a plurality of kinds flexible
Prepared and formed in advance for each circuit pattern on the circuit board
Selected from the multiple blade molds
Since configured to constant, only changing the fixing position of the replacement or the cutting die of the cutting die portion, it is possible to form a flexible circuit board of the various circuit patterns, to prepare a cutting die portion required Only, it is possible to greatly reduce the manufacturing cost of the die stamp die as compared with the related art, and it is extremely effective for manufacturing a flexible circuit board by the die stamping method. Die stamp according to claim 2 of the present invention
According to the mold, the blade mold parts with different blade widths can be freely combined.
Flexible circuit board of various circuit patterns
Plates can be formed, especially between adjacent blade
Separation width should be easily adjusted with spacers
Becomes possible. Die stamp according to claim 3 of the present invention
According to the metal mold, the base is formed in a plane quadrilateral and the
A quadrangular concave portion with a predetermined depth in plan view is formed in the plane.
Is equivalent to the length of one side of the square shape in plan view of the concave portion of the base.
Simply insert each blade part of the length into the concave part detachably
Thus, the blade mold portion can be easily replaced. This place
If the gap between adjacent blades is
Can be adjusted more easily. Contract for this invention
According to the die stamping die according to claim 4 and claim 5.
For example, by replacing the blade mold part in units of a predetermined area,
A plurality of types of flexible circuit boards can be easily manufactured.
According to a die stamping die according to claim 6 of the present invention.
For example, the base is formed in a substantially cylindrical shape, and each
When inserting into the outer circumference of the
The keyways of the two
The blades from both sides to secure each blade to the base
Just by engaging the flat key on the base side with the key groove on each blade mold side
Prevents rotation of each blade relative to the base,
By rotating around the axis of the base, the blade of each blade
Thereby, the metal foil can be cut.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of a die stamping die according to the present invention.

FIG. 2 is a perspective view of the first embodiment.

FIG. 3 is an exploded perspective view of a part of FIG. 2;

FIG. 4 is an exploded perspective view of another part of FIG. 2;

FIG. 5 is a perspective view of a flexible circuit board manufactured in the first embodiment.

FIG. 6 is a perspective view of a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of a part of FIG. 6;

FIG. 8 is an exploded perspective view of another part of FIG. 6;

FIG. 9 is a perspective view of a third embodiment of the present invention.

FIG. 10 is an exploded perspective view of a part of FIG. 9;

FIG. 11 is an exploded perspective view of another part of FIG. 9;

FIG. 12 is a plan view of a flexible circuit board manufactured in a third embodiment.

FIG. 13 is a perspective view of a blade mold portion having a blade shape different from that of FIG. 9;

FIG. 14 is a plan view of a flexible circuit board manufactured in a third embodiment.

FIG. 15 is a perspective view of a fourth embodiment of the present invention.

FIG. 16 is a perspective view of a blade mold portion having a blade shape different from that of FIG. 15;

FIG. 17 is an explanatory view of a conventional flexible circuit board manufacturing process.

FIG. 18 is an explanatory diagram of a manufacturing process of a conventional flexible circuit board.

FIG. 19 is an explanatory diagram of a manufacturing process of a conventional flexible circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Shaft part 12a-12d 1st-4th blade type part 21,41,45 Flexible circuit board 31,51 Base 32a-32d 5th-8th blade type part 42 Base film 43 Metal foil 44a-44c 9th-9th 11 blade mold portions 52a to 52c 12th to 14th blade mold portions

Claims (6)

(57) [Claims] 1. A method of manufacturing a flexible circuit board by a die stamping method, wherein a metal foil of an FPC base material having a metal foil adhered to a base film is applied to a different metal foil.
Types of flexible circuit boards having different circuit patterns
Of the desired flexible circuit board circuit pattern
What is claimed is: 1. A die stamping die to be cut correspondingly , comprising: a base; and each of the circuit patterns of the plurality of types of flexible circuit boards.
Are formed corresponding to the partial areas of the
Selectively detachably provided with a blade-type portion of the multiple that will be inserted, the desired flexible times from the plurality of the cutting die unit
Select several blades corresponding to the circuit pattern on the circuit board.
Selected and assembled into a parallel arrangement according to the circuit pattern
A die for a die stamp, which is detachably inserted into the base . (2) The mold for a die stamp according to claim 1.
So, The base is formed in a substantially cylindrical shape, Each of the blade mold portions is detachably inserted around the outer periphery of the base portion.
And each of the plurality of types of flexible
Of the metal foil of each of the circuit patterns of the xivable circuit board
A plurality of blade molds formed in a blade width corresponding to each width.
Some of them are selected and parallel to the axial direction of the base
Inserted, The die stamping die, Each ring is detachably inserted into the outer periphery of the substrate.
Formed adjacent to each other according to the circuit pattern.
It is interposed between the blade dies to adjust the separation between the blade dies.
Multiple spacers for alignment, A plurality of blade-shaped portions inserted parallel to an axial direction of the base portion;
And screw both ends of the base so as to sandwich the spacer.
And a stopper which is combined with
Mold for istamps. (3) The mold for a die stamp according to claim 1.
So, The base is formed in a plane quadrilateral and located in the plane.
Square in plan view at constant depth A concave part of the shape is formed, Each of the blade mold portions has a square shape in plan view of the concave portion of the base portion.
Each formed to a length equal to the length of one side of the shape, and
The respective circuit patterns of the plurality of types of flexible circuit boards
Formed in a blade width corresponding to each width of the metal foil of the
Some of the blade mold portions are selected and the base portion is selected.
Is detachably inserted into the concave portion of the The thickness of each blade mold portion is such that the blade of each blade mold portion is
Set to protrude from the upper surface of the concave portion, The die stamping die has a flat portion of the concave portion of the base.
Formed to a length equivalent to the length of one side of a square shape in plan view
Between the adjacent blade mold portions according to the circuit pattern.
For adjusting the separation width between the blade mold portions
DISTIST further provided with a number of spacers
Mold for pump. (4) The mold for a die stamp according to claim 1.
So, The base is formed in a substantially cylindrical shape, Each of the blade mold portions is detachably inserted around the outer periphery of the base portion.
So that each blade is
The pattern of the blade of the mold part is the above-mentioned plural kinds of flexible circuits.
It is formed corresponding to the circuit pattern of a predetermined partial area of the substrate.
And The die stamping die is parallel to the axial direction of the base.
The base portion so as to sandwich the plurality of mounted blade mold portions;
It further comprises stoppers screwed to both ends of the
Die stamping die. (5) The mold for a die stamp according to claim 1.
So, The base is formed in a plane quadrilateral and located in the plane.
A quadrangular concave portion with a constant depth in plan view is formed, Each of the blade mold portions has a square shape in plan view of the concave portion of the base portion.
Each formed to a length equal to the length of one side of the shape, The blade pattern of each of the blade mold portions may be the plurality of types of flexi
Corresponding to the circuit pattern of a predetermined partial area of the circuit board.
Formed The thickness of each blade mold portion is such that the blade of each blade mold portion is
That it is set to protrude from the upper surface of the concave portion
Die stamping mold. 6. A die according to claim 2 or claim 4.
A mold for tamping, On the outer periphery of the base, a ridge-shaped protrusion parallel to the axial direction of the base is provided.
A flat key is formed, On the inner periphery of each of the blade mold portions and the spacer,
A key groove to be inserted into the flat key of the substrate is formed;
Die stamping die.