阅读说明：本技术 柔板冲切模具及电路板产品 (Flexible board punching die and circuit board product ) 是由 张颖丽 于 2021-08-06 设计创作，主要内容包括：本发明涉及一种柔板冲切模具及电路板产品。该柔板冲切模具包括模具本体,设于所述模具本体上的模具冲切头,以及辅助冲切头；所述模具冲切头的中心开设有柔板冲切口,所述模具冲切头上还开设有与所述柔板冲切口连通的冲头安装槽；辅助冲切头嵌设于所述冲头安装槽中,并突出至所述柔板冲切口中；其中,所述辅助冲切头的凸出部分的一个侧面边设为第一直边,所述柔板冲切口与所述冲头安装槽相邻的冲切边设为第二直边,所述第一直边与所述第二直边之间围设成第一直角刀口。本发明可解决相关技术中传统冲切模具的刀口的内角为圆角,无法满足柔板的外形拐角加工为直角的需求的问题。(The invention relates to a flexible board punching die and a circuit board product. The flexible plate punching die comprises a die body, a die punching head and an auxiliary punching head, wherein the die punching head is arranged on the die body; the center of the die punching head is provided with a flexible plate punching opening, and the die punching head is also provided with a punch head mounting groove communicated with the flexible plate punching opening; the auxiliary punching head is embedded in the punch mounting groove and protrudes into the punching notch of the flexible plate; one side edge of the protruding portion of the auxiliary punching head is set as a first straight edge, the punching edge of the flexible plate punching cut adjacent to the punch mounting groove is set as a second straight edge, and a first right-angle knife edge is formed between the first straight edge and the second straight edge in an enclosing mode. The invention can solve the problem that the inner angle of the edge of the traditional punching die is a round angle in the prior art, and the requirement that the appearance corner of the flexible plate is processed into a right angle cannot be met.)

1. A die-cut mould of flexplate which characterized in that includes:

a mold body;

the die punching head is arranged on the die body; the center of the die punching head is provided with a flexible plate punching opening, and the die punching head is also provided with a punch head mounting groove communicated with the flexible plate punching opening; and the number of the first and second groups,

the auxiliary punching head is embedded in the punch mounting groove and protrudes into the punching notch of the flexible plate;

one side edge of the protruding portion of the auxiliary punching head is set as a first straight edge, the punching edge of the flexible plate punching cut adjacent to the punch mounting groove is set as a second straight edge, and a first right-angle knife edge is formed between the first straight edge and the second straight edge in an enclosing mode.

2. The flexible plate punching die according to claim 1, wherein the auxiliary punching head comprises a punch connecting seat and a rectangular punching head main body protruding from the punch connecting seat, the punch connecting seat is embedded in the punch mounting groove in an interference manner, the punching head main body protrudes from the punch mounting groove, and a side edge of the punching head main body and a punching edge of the adjacent flexible plate punching notch are enclosed to form the first right-angle edge.

3. The flexible plate punching die of claim 2, wherein the punch mounting groove is a wedge-shaped groove with a narrow opening and a wide bottom, and the punch connecting seat is correspondingly provided with a wedge-shaped block structure.

4. The flexible plate blanking die of claim 2, wherein the depth value of the punch mounting groove is greater than the height value of the punch connecting seat, the blanking head body portion being located in the punch mounting groove;

the punch mounting groove comprises a mounting groove main body and a rectangular transition groove formed between the mounting groove main body and the flexible plate punching notch, the punch connecting seat is embedded in the mounting groove main body in an interference mode, and the punching head main body is embedded in the rectangular transition groove in an interference mode.

5. The flexible plate blanking die of claim 4, wherein the punch connecting seat of the auxiliary blanking head has a bottom width of Y, a top width of X, and a height of B, and the following relationships exist: y is more than or equal to 5X; the width of the punching head main body is X;

the height of the rectangular transition groove is A, the width of the rectangular transition groove is X, and the rectangular transition groove has the following relationship: b is more than or equal to A, and A is more than or equal to 0.2 mm;

and the width of the bottom surface of the mounting groove main body is Y, the width of the top surface of the mounting groove main body is X, and the height of the mounting groove main body is B.

6. The flexible board blanking die according to any one of claims 1 to 5, wherein the other side edge of the protruding portion of the auxiliary blanking head is provided with a third straight edge, and a second right-angle knife edge is enclosed between the third straight edge and the second straight edge.

7. The flexible plate punching die of claim 6, wherein the perpendicularity of the two square edges of the first square edge and the second square edge is less than 0.10mm, and Cpk > 1.33;

the tolerance of the external dimensions of two right-angle edges of the first right-angle knife edge and the second right-angle knife edge is less than or equal to +/-0.05 mm, and Cpk is greater than 1.67.

8. The flexible plate punching die according to claim 6, wherein the die punching head further has a plurality of punch mounting grooves communicating with the flexible plate punching openings, the plurality of auxiliary punching heads are embedded in the plurality of punch mounting grooves in a one-to-one correspondence, and a plurality of first right-angle edges or/and a plurality of second right-angle edges are formed between side edges of the plurality of auxiliary punching heads and the punching edges of the flexible plate punching openings.

9. The flexible plate punching die according to claim 6, wherein the auxiliary punching head comprises a first punching head embedded in the punch mounting groove and protruding into the flexible plate punching notch, and a second punching head embedded in the first punching head, wherein the first right-angle edge or the second right-angle edge is formed between an outer side edge of the first punching head and a punching edge of the flexible plate punching notch, and a third right-angle edge is formed between the outer side edge of the first punching head and an outer side edge of the second punching head.

10. A circuit board product, characterized in that the circuit board product is a flexible circuit board with right-angled outer corners, which is manufactured by punching a flexible board plate by using the flexible board punching die according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of circuit board manufacturing, in particular to a flexible board punching die and a circuit board product.

Background

In the manufacturing process of the flexible circuit board, the outer shape corner of the flexible circuit board needs to be at a right angle sometimes. In the conventional technology, a flexible circuit board is generally obtained by punching and processing a punching die, and a knife edge of the punching die is obtained by wire cutting by using a copper wire. However, since the copper wire used for wire cutting has a certain diameter, the internal angle of the edge of the punching die obtained by machining is a circular angle, and a right-angled internal angle of the edge cannot be obtained. The outer corner of the flexible circuit board processed by the punching die with the knife edge having the inner angle of a circular corner can also correspond to a round corner, so that the requirement that the outer corner of the flexible circuit board is a right angle cannot be met.

Disclosure of Invention

The invention provides a flexible board punching die and a circuit board product, which can solve the problem that the inner angle of the edge of the traditional punching die in the related technology is a round angle and the requirement that the appearance corner of a flexible board is processed into a right angle cannot be met.

The invention provides a flexible plate punching die, which comprises:

a mold body;

the die punching head is arranged on the die body; the center of the die punching head is provided with a flexible plate punching opening, and the die punching head is also provided with a punch head mounting groove communicated with the flexible plate punching opening; and the number of the first and second groups,

the auxiliary punching head is embedded in the punch mounting groove and protrudes into the punching notch of the flexible plate;

one side edge of the protruding portion of the auxiliary punching head is set as a first straight edge, the punching edge of the flexible plate punching cut adjacent to the punch mounting groove is set as a second straight edge, and a first right-angle knife edge is formed between the first straight edge and the second straight edge in an enclosing mode.

In some embodiments, the auxiliary punching head includes a punch connecting seat and a rectangular punching head main body protruding from the punch connecting seat, the punch connecting seat is embedded in the punch mounting groove in an interference manner, the punching head main body protrudes out of the punch mounting groove, and a first right-angle edge is defined between a side edge of the punching head main body and a punching edge of the adjacent punching opening of the flexible plate.

In some embodiments, the punch mounting groove is a wedge-shaped groove with a narrow opening and a wide bottom, and the punch connecting seat is correspondingly provided with a wedge-shaped block structure.

In some embodiments, the punch mounting slot has a depth value greater than a height value of the punch connecting seat, the punch head body portion being located in the punch mounting slot;

the punch mounting groove comprises a mounting groove main body and a rectangular transition groove formed between the mounting groove main body and the flexible plate punching notch, the punch connecting seat is embedded in the mounting groove main body in an interference mode, and the punching head main body is embedded in the rectangular transition groove in an interference mode.

In some embodiments, the punch connecting seat of the auxiliary blanking head has a bottom width of Y, a top width of X, and a height of B, and the following relationships exist: y is more than or equal to 5X; the width of the punching head main body is X;

the height of the rectangular transition groove is A, the width of the rectangular transition groove is X, and the rectangular transition groove has the following relationship: b is more than or equal to A, and A is more than or equal to 0.2 mm;

and the width of the bottom surface of the mounting groove main body is Y, the width of the top surface of the mounting groove main body is X, and the height of the mounting groove main body is B.

In some embodiments, the other side edge of the protruding portion of the auxiliary blanking head is a third straight edge, and a second right-angle knife edge is enclosed between the third straight edge and the second straight edge.

In some embodiments, the perpendicularity of the two legs of the first and second right angle knife edges is less than 0.10mm, and Cpk > 1.33;

the tolerance of the external dimensions of two right-angle edges of the first right-angle knife edge and the second right-angle knife edge is less than or equal to +/-0.05 mm, and Cpk is greater than 1.67.

In some embodiments, the die cutting head is further provided with a plurality of punch mounting grooves communicated with the flexible plate cutting opening, the plurality of auxiliary cutting heads are embedded in the plurality of punch mounting grooves in a one-to-one correspondence manner, and a plurality of first right-angle edges or/and a plurality of second right-angle edges are formed between side edges of the plurality of auxiliary cutting heads and cutting edges of the flexible plate cutting opening.

In some embodiments, the auxiliary die-cutting head includes a first die-cutting head embedded in the punch mounting groove and protruding into the flexible plate die-cutting opening, and a second die-cutting head embedded on the first die-cutting head, the first right-angle knife edge or the second right-angle knife edge is formed between an outer side edge of the first die-cutting head and a die-cutting edge of the flexible plate die-cutting opening, and a third right-angle knife edge is formed between the outer side edge of the first die-cutting head and an outer side edge of the second die-cutting head.

In some embodiments, an auxiliary mounting groove is formed in a side surface or a top surface of the first blanking head, and the second blanking head is embedded in the auxiliary mounting groove.

In addition, the invention provides a circuit board product, wherein the circuit board product is a flexible circuit board which is manufactured by punching a flexible board plate by using the flexible board punching die and has a right-angled outer corner.

The technical scheme provided by the invention has the beneficial effects that:

according to the flexible board punching die provided by the invention, the edge of the flexible board punching notch of the die punching head is provided with the punch mounting groove, and the auxiliary punching head protruding to the flexible board punching notch is arranged in the punch mounting groove, so that a first straight edge formed by the side edge of the auxiliary punching head and a second straight edge perpendicular to the first straight edge are formed by the punching notch edge of the flexible board punching notch and the punching trimming edge adjacent to the first straight edge, and the first straight edge and the second straight edge are surrounded and spliced to form a first right-angle knife edge. And in the process of punching the flexible plate by using the flexible plate punching die, a first right-angle knife edge formed by enclosing the die can be used for directly punching a right-angle appearance corner on the flexible plate. Therefore, the problem that in the prior art, because the die-cut die for the flexible board is machined by copper wire line cutting, a right-angle knife edge cannot be machined, and a right-angle appearance corner cannot be punched on the flexible board by using the right-angle knife edge on the die can be solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a circuit board product (flexible board) processed by a flexible board punching die according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a flexible board punching die according to an embodiment of the present invention;

FIG. 3 is a schematic front view of a flexible board punching mold according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a die-cutting head of the flexible board die-cutting die according to an embodiment of the present invention;

fig. 5 is a schematic front view of a die-cutting head of the flexible board die-cutting die according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of an auxiliary punching head of the flexible board punching mold according to the embodiment of the present invention;

fig. 7 is a front view of an auxiliary punching head of the flexible board punching mold according to the embodiment of the invention;

FIG. 8 is a schematic diagram of the measurement results of the verticality within the specification of the outer corner of the flexible plate processed by the flexible plate punching die according to the embodiment of the invention;

FIGS. 9-10 are schematic diagrams illustrating the measurement results of the outside dimensions of the corners of the flexible board processed by the flexible board punching die in the specification according to the embodiment of the present invention;

fig. 11 is a schematic profile showing that the measured verticality and the external dimension Cpk of the external corner of the flexible board processed by the flexible board punching die according to the embodiment of the present invention meet the requirements of customers.

In the figure: 10. flexible boards (or circuit board products); 12. a right angle profile corner; 100. punching a die to cut a head; 102. punching a notch on the flexible plate; 104. a punch mounting groove; 1042. a mounting groove main body; 1044. a rectangular transition groove; 106. a second straight side; 200. auxiliary punching head; 210. a punch connecting seat; 220. punching the head main body; 222. a first straight side; 224. the third straight side.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the conventional technology, a flexible circuit board is generally obtained by punching and processing a punching die, and a knife edge of the punching die is obtained by wire cutting by using a copper wire. However, since the copper wire used for wire cutting has a certain diameter, the internal angle of the edge of the punching die obtained by machining is a circular angle, and a right-angled internal angle of the edge cannot be obtained. The outer corner of the flexible circuit board processed by the punching die with the knife edge having the inner angle of a circular corner can also correspond to a round corner, so that the requirement that the outer corner of the flexible circuit board is a right angle cannot be met. In order to solve the above technical problems, the present invention provides a flexible board punching mold and a circuit board product manufactured by using the flexible board punching mold (as shown in fig. 1).

Specifically, as shown in fig. 2 to 3, the flexible board punching die provided by the present invention includes a die body (not shown), a die punching head 100 disposed on the die body, and an auxiliary punching head 200 disposed on the die punching head 100. Like this, can set up the die-cut structure of mould into split type structure, just can enclose between mould die-cut head 100 and supplementary die-cut head 200 and establish the concatenation and form the right angle edge of a knife, utilize the right angle edge of a knife just can process out right angle appearance turning 12 on the flexbile plate, just can solve and can't directly process out the right angle edge of a knife (because receiving the restriction of line cutting processing technology, can only process out the fillet edge) on the die-cut structure of mould among the conventional art, lead to the unable problem of die-cut processing out right angle appearance turning 12 on flexbile plate 10.

Specifically, as shown in fig. 4 to 7, a flexible plate punch notch 102 may be formed in the center of the die punch 100, and a punch mounting groove 104 communicating with the flexible plate punch notch 102 is further formed on the die punch 100. Namely, the die punch 100 may be configured as an annular structure, and the inner opening surrounded by the annular structure forms the flexible plate punch notch 102, and the flexible plate 10 may be punched by using the flexible plate punch notch 102 to form a desired shape structure; further, a punch mounting groove 104 may be formed on the inner ring side of the flexible plate blanking portion 102 to facilitate installation of the auxiliary blanking head 200. The auxiliary punch 200 may be inserted into the punch mounting groove 104 and protrude into the flexible plate punch 102. Furthermore, one side edge of the protruding portion of the auxiliary punch 200 may be a first straight edge 222 (i.e., a straight edge rather than a curved edge), while the punching edge of the flexible board punch 102 adjacent to the punch mounting groove 104 (i.e., corresponding to the auxiliary punch 200) is a second straight edge 106 (i.e., a straight edge rather than a curved edge), and a first straight edge α is defined between the first straight edge 222 and the second straight edge 106.

According to the flexible board punching die provided by the invention, the edge of the flexible board punching notch 102 of the die punching head 100 is provided with the punch head mounting groove 104, and the auxiliary punching head 200 protruding to the flexible board punching notch 102 is arranged in the punch head mounting groove 104, so that a first straight edge 222 formed by the side edge of the auxiliary punching head 200 and a second straight edge 106 perpendicular to the first straight edge 222 are formed by the punching notch edge (punching notch) of the flexible board punching notch 102 and the punching notch edge adjacent to the first straight edge 222, and the first straight edge 222 and the second straight edge 106 are surrounded and spliced to form the first right-angle knife notch alpha. In the process of punching the flexible board 10 by using the flexible board punching die, the first right-angle knife edge formed by surrounding the die can be used for directly punching the right-angle outline corner 12 on the flexible board 10. Therefore, the problem that the right-angle appearance corner 12 cannot be punched on the flexible board by the right-angle knife edge on the die because the die-cutting die for the flexible board cannot process the right-angle knife edge due to the fact that copper wire cutting occurs in the traditional technology can be solved.

The die cutting head 100 may be provided with a plurality of punch mounting grooves 104 communicating with the flexible plate cutting slit 102, the plurality of auxiliary cutting heads 200 may be fitted into the plurality of punch mounting grooves 104 in a one-to-one correspondence, and a plurality of right-angled edges may be formed by surrounding and joining side edges of the plurality of auxiliary cutting heads 200 and the cutting edge of the flexible plate cutting slit 102. That is, when a plurality of right-angle shape corners 12 need to be processed on the flexible board 10, a plurality of auxiliary punching heads 200 can be embedded on the die punching head 100, so that a right-angle knife edge is formed between each auxiliary punching head 200 and the flexible board punching notch 102 in an enclosing manner, and the right-angle shape corners 12 can be conveniently punched and processed at corresponding positions of the flexible board 10. Further, one side edge of the projecting portion of each auxiliary blanking head 200 is set as a first straight edge 222, the blanking edge of the flexible plate blanking portion 102 adjacent to each punch mounting groove 104 is set as a second straight edge 106, and a first right-angle blade α is enclosed between the first straight edge 222 and the adjacent second straight edge 106. The auxiliary punching heads 200 and the punching edges of the flexible plate punching notches 102 may be surrounded and spliced to form a plurality of first right-angle notches α.

In addition, the die cutting head 100 may be provided with only one punch mounting groove 104 communicating with the flexible plate cut 102, and only one auxiliary cutting head 200 is installed in the punch mounting groove 104, so as to form a right-angle knife edge between the auxiliary cutting head 200 and the flexible plate cut 102 (i.e. one auxiliary cutting head 200 and the cutting edge of the flexible plate cut 102 may be joined together to form a first right-angle knife edge α), so as to machine a right-angle outer corner 12 on the flexible plate 10.

Further, as shown in fig. 6 to 7, the auxiliary blanking head 200 may include a punch connecting seat 210 and a rectangular blanking head main body 220 protruding from the punch connecting seat 210, the punch connecting seat 210 may be interference-fitted into the punch mounting groove 104, the blanking head main body 220 may protrude from the punch mounting groove 104, and a side of the blanking head main body 220 may surround a first rectangular cut α with a blanking edge of the adjacent flexible plate blanking cut 102. The auxiliary blanking head 200 can be fixed to the inner ring side of the annular die blanking head 100 by embedding the punch connecting seat 210 of the auxiliary blanking head 200 in the punch mounting groove 104 of the die blanking head 100; and a first right-angle knife edge alpha can be formed between the rectangular punching head main body 220 protruding into the flexible plate punching cut 102 and the punching edge of the flexible plate punching cut 102 in a surrounding and splicing manner. Specifically, two sides or one side of the rectangular punching head main body 220 may be straight first straight sides 222, a side line portion adjacent to the punching side of the flexible plate punching notch 102 and the first straight sides 222 may be straight second straight sides 106, and a first right-angle knife edge α may be formed by enclosing and splicing the first straight sides 222 and the second straight sides 106.

Moreover, in some embodiments, the punch mounting groove 104 may be a wedge-shaped groove with a narrow opening and a wide bottom, and the punch connecting seat 210 may be a wedge-shaped block structure. By setting the punch mounting groove 104 as a wedge-shaped groove and setting the punch connecting seat 210 as a wedge structure corresponding to the wedge-shaped groove, the punch connecting seat 210 can be more closely embedded in the punch mounting groove 104 and is less likely to fall off and separate.

The punch mounting groove 104 may be a trapezoidal groove having a narrow opening and a wide bottom, and the punch holder 210 may be a trapezoidal block structure. The punch mounting groove 104 may be an arc-shaped groove having a narrow opening and a wide bottom, and the punch holder 210 may be an arc-shaped block structure. The punch mounting groove 104 may be a different shaped groove having a narrow opening and a wide bottom, and the punch holder 210 may be a different shaped block structure. Thus, the punch connecting seat 210 can be stably and reliably mounted in the punch mounting groove 104 without being easily detached.

Also, the depth of the punch mounting groove 104 may be greater than the height of the punch coupling seat 210, and the punch body 220 is partially located in the punch mounting groove 104. By making the depth of the punch mounting groove 104 slightly greater than the height of the punch connecting seat 210, after the punch connecting seat 210 is inserted into the punch mounting groove 104, the connection transition portion between the punch main body 220 of the auxiliary punch 200 and the punch connecting seat 210 is located in the punch mounting groove 104, so that the portion of the side surface of the punch main body 220 protruding into the flexible plate punch cut 102 is completely a straight portion, and the connection transition portion between the punch main body 220 and the punch connecting seat 210 (i.e., the non-straight portion of the punch main body 220) does not protrude into the flexible plate punch cut 102, and a non-right-angle knife edge is not formed between the non-straight portion of the punch main body 220 and the straight edge of the flexible plate punch cut 102.

Further, the punch mounting groove 104 may include a mounting groove body 1042 and a rectangular transition groove 1044 disposed between the mounting groove body 1042 and the flexible plate punching notch 102 in a communicating manner, so that when the punch connecting seat 210 is correspondingly inserted into the mounting groove body 1042 of the punch mounting groove 104, a portion of the rectangular punching head body 220 is inserted into the rectangular transition groove 1044, which not only enables the connection between the auxiliary punching head 200 and the die punching head 100 to be more stable and reliable, but also enables a right-angled knife edge formed by surrounding and splicing between the outer side edge of the auxiliary punching head 200 and the straight punching edge of the flexible plate punching notch 102 to be more guaranteed.

Moreover, the auxiliary blanking head 200 may be embedded in the mounting groove body 1042 of the punch mounting groove 104 by interference, that is, the punch connecting seat 210 of the auxiliary blanking head 200 may be in interference connection with the mounting groove body 1042, and a portion of the blanking head body 220 is also in interference connection with the rectangular transition groove 1044. Specifically, the punch connecting seat 210 of the auxiliary blanking head 200 has a bottom width Y, a top width X and a height B, and the following relationships exist: y is more than or equal to 5X; it can be seen that the width of the punch head body 220 is also X (which is the same as the width of the top surface of the punch connecting seat 210), and the height is H; and the specific dimensions of X, Y, H may be determined based on the requirements of the die cut profile of the flex. Moreover, the height of the rectangular transition groove 1044 can be a (i.e. the height of the clamping portion between the punch main body 220 and the rectangular transition groove 1044 is a), and the width of the rectangular transition groove 1044 is X (which is the same as the width of the top surface of the punch connecting seat 210), which have the following relationship: b is more than or equal to A, and A is more than or equal to 0.2 mm.

Further, since the mounting groove body 1042 of the punch mounting groove 104 is interference-connected to the punch connecting seat 210, it is understood that the groove bottom surface width of the mounting groove body 1042 is also Y, the groove top surface width is also X, and the groove height is also B.

In addition, the die cutting head 100 may be formed with one or more punch mounting grooves 104 communicating with the flexible plate cutting portion 102, one or more auxiliary cutting heads 200 may be inserted into the one or more punch mounting grooves 104 in a one-to-one correspondence, and one or more first right-angle cutting edges α or/and one or more second right-angle cutting edges β may be formed between side edges of the one or more auxiliary cutting heads 200 and the cutting edge of the flexible plate cutting portion 102.

Specifically, in some embodiments, the other side edge of the protruding portion of the auxiliary blanking head 200 is a third straight edge 224, and a second right-angle knife edge β is formed between the third straight edge 224 and the second straight edge 106. The other side edge of the punching head main body 220 of the auxiliary punching head 200 and the punching edge of the flexible plate punching notch 102 are surrounded and spliced to form a second right-angle knife edge β, so that a right-angle knife edge is respectively formed between each of the two sides of the punching head main body 220 and the punching edge of the flexible plate punching notch 102, and two right-angle appearance corners 12 can be respectively punched on the flexible plate 10 by utilizing the first right-angle knife edge α and the second right-angle knife edge β of the two opposite sides of the auxiliary punching head 200.

In addition, in other embodiments, only one first right-angle edge α or one second right-angle edge β may be formed between one side edge of the die-cutting head body 220 and the die-cutting edge of the flexible plate die-cut 102. Further, the first right-angle blade α or the second right-angle blade β may be provided on both sides of the one or more auxiliary blanking heads 200, or the first right-angle blade α or the second right-angle blade β may be provided on one side of the one or more auxiliary blanking heads 200.

In addition, the auxiliary blanking head 200 may include a first blanking head (not shown) embedded in the punch mounting groove 104 and protruding into the flexible plate blanking opening 102, and a second blanking head (not shown) embedded in the first blanking head, wherein a first right-angle edge α or a second right-angle edge β is formed between an outer side edge of the first blanking head and a blanking edge of the flexible plate blanking opening 102, and a third right-angle edge (not shown) is defined between the outer side edge of the first blanking head and an outer side edge of the second blanking head. That is, after an auxiliary blanking head 200 (i.e., a first blanking head) is embedded on the blanking edge of the flexible plate blanking opening 102 of the die blanking head 100, another auxiliary blanking head 200 (i.e., a second blanking head) is embedded on the auxiliary blanking head 200, so that a right-angle knife edge with a complicated structure can be formed on the blanking structure of the die, and thus, a right-angle appearance corner 12 with a complicated structure can be blanked on the flexible plate 10.

Further, an auxiliary mounting groove is formed in a side surface or a top surface of the first die-cutting head, and the second die-cutting head is embedded in the auxiliary mounting groove and protrudes out of the flexible plate die-cut 102. Also, the first and second punches may each include a wedge-shaped punch holder 210 and a rectangular punch body 220 protruded from the punch holder 210. Furthermore, the punch connecting seat 210 of the first punching head is embedded in the wedge-shaped punch mounting groove 104 of the die punching head 100, and the rectangular punching head body 220 of the first punching head protrudes into the flexible plate punching notch 102; the auxiliary mounting groove is formed in the rectangular die-cutting head body 220 of the first die-cutting head, the punch connecting seat 210 of the second die-cutting head is embedded in the auxiliary mounting groove, and the die-cutting head body 220 of the second die-cutting head protrudes into the flexible plate die-cutting opening 102. In this way, a right-angle edge (i.e., a first right-angle edge α or a second right-angle edge β) may be formed by surrounding and joining the side edge of the die-cutting head main body 220 of the first die-cutting head and the die-cutting edge of the flexible plate die-cutting 102, and a right-angle edge (i.e., a third right-angle edge) may be formed by surrounding and joining the side edge of the die-cutting head main body 220 of the first die-cutting head and the side edge of the die-cutting head main body 220 of the second die-cutting head. When the second die-cutting head is embedded in the top surface of the first die-cutting head, the third right-angle blade can be formed on the top surface side of the die-cutting head main body of the first die-cutting head; when the second punching head is embedded in the side surface of the first punching head, the third right-angle knife edge can be formed on the side surface of the punching head main body of the first punching head.

Furthermore, one or more second punching heads may be fitted to the first punching head as required.

In addition, the auxiliary blanking head 200 may further include more blanking heads as needed, that is, in addition to the first blanking head embedded in the die blanking head 100 and the second blanking head embedded in the first blanking head, a third blanking head embedded in the second blanking head may be further included, and the structure of the third blanking head may be the same as that of the first blanking head and the second blanking head.

In addition, the perpendicularity of two right-angle sides of the first right-angle cutting edge alpha, the second right-angle cutting edge beta and the third right-angle cutting edge is less than 0.10mm, and Cpk (Complex Process Capability index) > 1.33; the tolerance of the outside dimensions of the two right-angle sides of the first right-angle blade alpha, the second right-angle blade beta and the third right-angle blade is less than or equal to +/-0.05 mm, and Cpk is more than 1.67.

In addition, the present invention provides a circuit board product 10, which is a flexible circuit board manufactured by punching a flexible board material by using the flexible board punching mold as described above, and has a right-angled outer corner. In addition, in the circuit board product obtained by the flexible board punching die, the perpendicularity and the external dimension of the right-angle external corner on the circuit board product are both within the specification (as shown in fig. 8 to 10), and the perpendicularity and the external dimension Cpk of the right-angle external corner on the circuit board product are both in accordance with the requirement (as shown in fig. 11).

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.