Circular knife assembly of FDC flexible circuit board integrated with IC and production and processing equipment of circular knife assembly

Abstract

The invention discloses a circular knife assembly of an IC-integrated FDC flexible circuit board and production and processing equipment thereof, and relates to the technical field of machining equipment, the circular knife assembly of the IC-integrated FDC flexible circuit board comprises a round roller body and a roller knife, and the roller knife is arranged on the periphery of the round roller body; the roller cutter comprises two cutting edge parts which are arranged at an interval; each blade part is provided with a first cutter face and a second cutter face, and the ends, away from the round roller body, of the first cutter face and the second cutter face are connected to form a cutter point; the included angle alpha between at least one of the two first cutter faces or the two second cutter faces of the two cutting edge parts and the height direction of the cutting edge parts is larger than or equal to 0 degree and smaller than or equal to 2.2 degrees. According to the circular knife assembly of the FDC flexible circuit board integrated with the IC, the waste discharge efficiency of waste materials after die cutting can be improved.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and in particular to a circular knife assembly for an integrated IC FDC flexible circuit board and its manufacturing equipment. Background Technology

[0002] Die-cutting is one of the core processes in the production of FDC (Flexible Printed Circuit) boards. Its core objective is to precisely cut the composite substrate using a die to obtain a circuit board substrate that meets the design dimensions and shape requirements, while simultaneously separating excess waste. Currently, in the mainstream FDC die-cutting processes, die design and optimization are key directions for improving processing accuracy and efficiency. Existing research mainly focuses on the ease of die size adjustment and cutting stability. However, in actual production, because the substrate of FDC flexible die-cutting boards is usually composed of a thin film (PI film or PET film) and a conductive layer (copper foil, aluminum foil, or copper-aluminum composite material), and the base film often has a certain degree of adhesion, the separated waste material tends to adhere tightly to the base film after die-cutting. In existing die-cutting processes, conventional blade designs often use a single-angle straight blade or a simple beveled blade. After cutting, the interface between the waste material and the base film is relatively flat, making it difficult to effectively reduce the adhesive force between them. This results in the waste material being difficult to separate from the base film, causing significant inconvenience to subsequent waste removal processes. Meanwhile, waste material tends to stick to the cutting edge surface, and the waste removal process is prone to jamming and residue, making waste removal inconvenient. In addition, the cutting edge is subjected to concentrated local stress, resulting in faster wear and frequent tool replacement, which affects production efficiency and increases maintenance costs. Summary of the Invention

[0003] The main objective of this invention is to provide a circular blade assembly for an integrated IC FDC flexible circuit board and its manufacturing equipment, aiming to solve at least one of the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention proposes a circular blade assembly for an integrated IC FDC flexible circuit board. The circular blade assembly includes a circular roller and a roller blade, the roller blade being disposed on the outer periphery of the circular roller. The roller blade includes two spaced-apart cutting edges. Each cutting edge has a first cutting face and a second cutting face, the ends of the first and second cutting faces away from the circular roller are connected to form a blade edge. Specifically, in the direction perpendicular to the axis from the blade edge to the circular roller, at least one of the two first cutting faces or the two second cutting faces of the two cutting edges forms an angle α with the perpendicular line, satisfying 0°≤α≤2.2°.

[0005] In one embodiment, the two first cutting surfaces of the two blade portions face each other and are inclined, and the two second cutting surfaces of the two blade portions are opposite to each other. The angle between the second cutting surfaces and the blade portions in the height direction is α1, which satisfies 0°≤α1≤2.2°.

[0006] In one embodiment, the included angle between the first cutting surface and the cutting edge in the height direction is β1, satisfying 24.1°≤β1≤30.3°.

[0007] In one embodiment, the distance between the edges of the two cutting edges ranges from 0.2 mm to 0.5 mm; and / or, The height of the roller cutter ranges from 1mm to 1.5mm.

[0008] In one embodiment, the two first cutting surfaces of the two blade portions are arranged facing each other, and the two second cutting surfaces of the two blade portions are arranged away from each other and at an angle. The included angle between the first cutting surface and the blade portion in the height direction is α2, which satisfies 0°≤α2≤2.2°.

[0009] In one embodiment, the included angle between the second cutting surface and the cutting edge in the height direction is β2, satisfying 24.1°≤β2≤30.3°.

[0010] In one embodiment, the roller cutter further includes a cutter base, one end of which is connected to the outer periphery of the circular roller, and the other end is connected to the two cutting edges.

[0011] In one embodiment, a blade cavity is formed between the two cutting edges, the bottom width of the blade cavity is D1, and the top width of the blade cavity is D2, satisfying 2*D1≤D2≤4*D1; or, The length of D1 ranges from 0.08mm to 0.14mm, and the length of D2 ranges from 0.2mm to 0.5mm.

[0012] In one embodiment, a blade cavity is formed between the two cutting edges, the bottom width of the blade cavity is D1, and the top width of the blade cavity is D2, satisfying D1≤D2≤1.5*D1; or, The length of D1 ranges from 0.2mm to 0.6mm, and the length of D2 ranges from 0.2mm to 0.65mm.

[0013] This invention also proposes a manufacturing equipment for an integrated circuit (IC) flexible circuit board (FDC). The equipment includes a circular blade assembly for the FDC flexible circuit board. The circular blade assembly comprises a circular roller and a blade, the blade being disposed on the outer periphery of the roller. Each blade includes two spaced-apart cutting edges; each cutting edge has a first cutting face and a second cutting face, the ends of the first and second cutting faces away from the roller being connected to form the blade edge. Specifically, in the direction perpendicular to the axis from the blade edge to the roller, at least one of the two first cutting faces or the two second cutting faces of the two cutting edges forms an angle α with the perpendicular, satisfying 0°≤α≤2.2°.

[0014] The technical solution of this invention includes a circular roller and a roller cutter, the roller cutter being disposed on the outer periphery of the circular roller; the roller cutter includes two spaced-apart cutting edges; each cutting edge has a first cutting face and a second cutting face, the ends of the first and second cutting faces away from the circular roller are connected to form a blade edge; wherein, in the direction perpendicular to the axis from the blade edge to the circular roller, at least one of the two first cutting faces or two second cutting faces of the two cutting edges makes an angle α with the perpendicular line, satisfying 0°≤α≤2.2°. Thus, by adopting a small angle design between the two first cutting faces or two second cutting faces and the height direction of the cutting edge, the contact area with waste material is reduced, and combined with the sharp structure of the blade edge, the waste material is easily separated from the cutting edge, which can further improve waste discharge efficiency and reduce the short-circuit hazard caused by waste residue. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the circular blade assembly of the FDC flexible circuit board with integrated IC provided by the present invention; Figure 2 A schematic diagram of the first structure of the roller cutter of the circular cutter assembly of the FDC flexible circuit board with integrated IC provided by the present invention. Figure 3 A schematic diagram of the second structure of the roller knife of the circular knife assembly of the FDC flexible circuit board with integrated IC provided by the present invention. Figure 4A schematic diagram of the roller cutter structure of the circular cutter assembly of the FDC flexible circuit board with integrated IC provided by the present invention for cutting the material to be die-cut. Figure 5 A schematic diagram of the third structure of the roller cutter of the circular cutter assembly of the FDC flexible circuit board with integrated IC provided by the present invention. Figure 6 A schematic diagram of the fourth structure of the roller cutter of the circular cutter assembly of the FDC flexible circuit board with integrated IC provided by the present invention. Figure 7 This is a schematic diagram of the roller cutter of the circular cutter assembly of the FDC flexible circuit board with integrated IC provided by the present invention for cutting the material to be die-cut.

[0017] Explanation of icon numbers: 1. Circular blade assembly for FDC flexible circuit board with integrated IC; 10. Circular roller; 20. Roller blade; 21. Blade edge; 21a. Blade base; 21b. Blade tip; 211. First blade face; 212. Second blade face; 22. Blade base; 23. Blade cavity; 3. Material to be die-cut; 31. Molding material; 32. Waste material.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Die-cutting is one of the core processes in the production of FDC (Flexible Printed Circuit) boards. Its core objective is to precisely cut the composite substrate using a die to obtain a circuit board substrate that meets the design dimensions and shape requirements, while simultaneously separating excess waste. Currently, in the mainstream FDC die-cutting processes, die design and optimization are key directions for improving processing accuracy and efficiency. Existing research mainly focuses on the ease of die size adjustment and cutting stability. However, in actual production, because the substrate of FDC flexible die-cutting boards is usually composed of multiple layers of materials such as PI film and aluminum foil, and the base film often has a certain degree of adhesion, the separated waste material tends to adhere tightly to the base film after die-cutting. In existing die-cutting processes, conventional blade designs often use a single-angle straight blade or a simple beveled blade. After cutting, the interface between the waste material and the base film is relatively flat, making it difficult to effectively reduce the adhesive force between them. This results in the waste material being difficult to separate from the base film, causing significant inconvenience to subsequent waste removal processes. Meanwhile, waste material easily adheres to the cutting edge surface, causing jamming and residue during waste removal, which hinders waste removal. Furthermore, the cutting edge experiences localized stress concentration, leading to rapid wear and frequent tool replacements, impacting production efficiency and increasing maintenance costs. This invention proposes a circular blade assembly for an integrated IC-based FDC flexible circuit board, which solves at least one of the aforementioned problems.

[0023] Please see Figure 1 , Figure 2 and Figure 5In one embodiment of the present invention, the circular blade assembly 1 of the FDC flexible circuit board of the integrated IC includes a circular roller body 10 and a roller blade 20. The roller blade 20 is disposed on the outer periphery of the circular roller body 10. The roller blade 20 includes two spaced-apart blade portions 21. Each blade portion 21 has a blade bottom 21a close to the circular roller body 10 and a blade edge 21b formed at the end away from the blade bottom 21a. Each blade portion 21 has a first blade surface 211 and a second blade surface 212. The ends of the first blade surface 211 and the second blade surface 212 away from the circular roller body 10 are connected to form the blade edge 21b. Among them, the two first cutting surfaces 211 or the two second cutting surfaces 212 of the two cutting edge portions 21 have an angle α between at least one of them and the perpendicular line from the blade edge 21b to the axis of the circular roller 10, satisfying 0°≤α≤2.2°.

[0024] Specifically, the circular blade assembly 1 of the integrated IC FDC flexible circuit board includes a circular roller body 10 and a roller blade 20. The circular roller body 10 has a cylindrical structure and can be made of 40Cr alloy steel. Its outer diameter and length can be designed according to the equipment installation requirements, without specific limitations. For example, the outer diameter can be 50mm-100mm and the length can be 200mm-500mm. Its outer circumference can be precision ground to a surface roughness Ra≤0.8μm to ensure the stability of the connection with the roller blade 20. The roller blade 20 is fixedly mounted on the outer circumference of the circular roller body 10, which can be achieved by welding, bolt connection, or integral molding.

[0025] The roller cutter 20 includes two spaced-apart cutting edges 21. Each cutting edge 21 can be made of cemented carbide (tungsten steel YC6X) with a hardness ≥ HRC60. The end closest to the roller body 10 is the blade base 21a, which is in close contact with the outer periphery of the roller body 10 or the subsequent blade base 22. The end furthest from the blade base 21a is mirror-polished or precision-machined to form a sharp blade edge 21b, ensuring cutting sharpness. Each cutting edge 21 has a first cutting surface 211 and a second cutting surface 212, both of which are planar structures. The end furthest from the roller body 10 is connected to form the sharp blade edge 21b.

[0026] The two first cutting surfaces 211 or the two second cutting surfaces 212 of the two cutting edge portions 21, at least one of which makes an angle α with the height direction of the cutting edge portion 21, satisfying 0°≤α≤2.2°. Specifically, at least one of the first cutting surfaces 211 and the second cutting surfaces 212 of the two cutting edge portions 21, in the direction perpendicular to the axis from the blade edge 21b to the circular roller body 10, makes an angle α with the vertical line (i.e., the height direction of the cutting edge portion 21 or the longitudinal extension direction from the blade bottom 21a to the blade edge 21b), and α satisfies 0°≤α≤2.2°.

[0027] The range of the aforementioned included angle α was determined through experimental verification. The following is a data table of experimental data.

[0028]

[0029] It should be noted that if α < 0°, this setting will cause the cutting edge 21 to deform easily during the cutting process of the die-cutting material 3, which will reduce the service life of the cutting edge 21. In addition, this angle is not convenient for the production and processing of the cutting edge.

[0030] As shown in the table above, the roller cutter 21 performs best when the α angle is 0°. The waste removal efficiency reaches 99.6%, with extremely smooth waste removal and no jamming or residue. At this angle, the edge quality of the die-cut material 31 is high, with almost no flanging or burrs, while the wear of the blade 21b is slow. This is because when α=0°, the blade 21b design ensures that the cutting force is evenly distributed on the edge of the material 3 to be die-cut, reducing concentrated stress and thus avoiding quality defects. It also facilitates the smooth removal of waste material 32 and the uniform wear of the blade 21b.

[0031] Furthermore, considering the production and processing factors of the roller cutter 20, when α is in the range of 0° to 2.2°, the bending deformation rate of the forming material 31 is relatively small when the circular cutter cuts the die-cutting material 3. This results in a larger contact area between the bottom film and the forming material 31, thereby increasing the bonding strength between the forming material 31 and the bottom film. This reduces the probability that the waste discharge film will mistakenly discharge the forming material 31 along with the waste material 32 during the waste recycling process, thus ensuring that the waste discharge efficiency of the waste material 32 remains above 98.5%. Among these, when α = 0°, the bending deformation rate of the forming material 31 is the smallest. Therefore, the contact area between the forming material 31 and the bottom film is the largest and the bonding strength is the highest. Consequently, the probability that the waste discharge film will mistakenly discharge the forming material 31 along with the waste material 32 during the waste recycling process is the lowest, resulting in the highest waste discharge efficiency.

[0032] For example, please see Figure 2 In one embodiment, the angle α between the first cutting face 211 and the cutting edge 21 in the height direction may be designed to satisfy 0°~2.2°. Preferably, α can be selected as 0°, 0.5°, 1°, 1.5° or 2.2°; when α=0°, the first cutting face 211 is completely parallel to the cutting edge 21 in the height direction, which is suitable for die-cutting ultra-thin materials 3 of 12μm-18μm, and can minimize the lateral compression of the cutting edge on the material 3 to be die-cut; when α=1°, the first cutting face 211 is slightly inclined, which is suitable for conventional materials 3 of 25μm-35μm to be die-cut, taking into account both waste removal smoothness and cutting stability; when α=2.2°, it can be used to die-cut thick materials 3 of 50μm-70μm to be die-cut, enhancing the structural strength of the cutting edge 21 and avoiding deformation of the cutting edge during cutting.

[0033] Please see Figure 5In another embodiment, the design may be such that only the included angle α between the second cutting face 212 and the cutting edge 21 in the height direction satisfies 0°~2.2°. Preferably, α can be selected as 0°, 0.5°, 1°, 1.5° or 2.2°; when α=0°, the second cutting face 212 is completely parallel to the cutting edge 21 in the height direction, which is suitable for die-cutting ultra-thin materials 3 of 12μm-18μm, and can minimize the lateral compression of the cutting edge on the material 3 to be die-cut; when α=1°, the second cutting face 212 is slightly inclined, which is suitable for conventional materials 3 of 25μm-35μm to be die-cut, taking into account both waste removal smoothness and cutting stability; when α=2.2°, it can be used to die-cut thick materials 3 of 50μm-70μm to be die-cut, enhancing the structural strength of the cutting edge 21 and avoiding deformation of the cutting edge during cutting.

[0034] By using either the first cutting face 211 or the second cutting face 212 to satisfy the small included angle α design, compared with the traditional single cutting face angle structure, it has higher process adaptability and can flexibly adjust the cutting face angle combination according to the thickness of the material 3 to be die-cut and the line accuracy. In addition, the small included angle cutting face can disperse cutting stress and effectively alleviate the problems of edge turning and burr residue of the formed material 31 in the prior art. At the same time, the small included angle structure reduces the contact area between the cutting face and the waste 32. Combined with the sharpness of the blade edge 21b, it makes the waste 32 easy to separate from the cutting edge, solving the pain point of waste discharge jamming. On the other hand, the combination of the cemented carbide cutting edge 21 and the small included angle structure can also reduce the local wear rate of the cutting edge, extend the tool life by 15%-30%, and reduce the frequency of downtime maintenance. At the same time, the small included angle design makes the cross-section of the die-cutting material 3 form a small arc when the blade part 21 cuts the die-cutting material 3. The blade edge 21b angle of 0°-2.2° minimizes the deformation of the molding material, ensuring the effective adhesion area between the molding material 31 and the bottom film, making it less likely to be carried away or displaced during waste discharge.

[0035] It should be noted that after the circular die assembly 1 of the FDC flexible circuit board with integrated IC performs circular die cutting on the die-cutting material 3, the die-cutting material 3 includes forming material 3131 and waste material 32 (see appendix). Figure 4 or Figure 7 The molding material 3131 is the actual product after die cutting, and the waste material 32 refers to the part of the actual product that is not needed. The waste material 32 needs to be discharged through the waste discharge film. In this embodiment, the included angle α is designed to reduce the adhesion between the waste material 32 and the bottom film, thereby facilitating the subsequent discharge of the waste material 32.

[0036] The technical solution of the present invention includes a circular roller body 10 and a roller cutter 20, the roller cutter 20 being disposed on the outer periphery of the circular roller body 10; the roller cutter 20 includes two spaced-apart blade portions 21, each blade portion 21 having a blade bottom 21a near the circular roller body 10 and a blade edge 21b formed at the end away from the blade bottom 21a; each blade portion 21 has a first blade surface 211 and a second blade surface 212, the ends of the first blade surface 211 and the second blade surface 212 away from the circular roller body 10 being connected to form the blade edge 21b; wherein, at least one of the two first blade surfaces 211 or the two second blade surfaces 212 of the two blade portions 21 has an angle α with the height direction of the blade portion 21, satisfying 0°≤α≤2.2°. Thus, by adopting a small angle design between the two first cutting surfaces 211 or the two second cutting surfaces 212 and the blade portion 21 in the height direction, the contact area with the waste material 32 is reduced. Combined with the sharp structure of the blade edge 21b, the waste material 32 is easily separated from the blade edge, which can further improve the waste removal efficiency and reduce the short circuit risk caused by the residue of waste material 32. At the same time, it also ensures the effective adhesion area between the molding material and the bottom film, making it less likely to be carried up or displaced during waste removal.

[0037] The included angle α of the blade portion 21 of the present invention includes at least the two blade portion 21 structural designs mentioned above. Please refer to... Figure 2 In one embodiment, the first structural design of the blade portion 21 is as follows: the two first cutting surfaces 211 of the two blade portions 21 face each other and are inclined, the two second cutting surfaces 212 of the two blade portions 21 face each other are opposite to each other, and the included angle between the second cutting surfaces 212 and the blade portion 21 in the height direction is α1, which satisfies 0°≤α1≤2.2°.

[0038] Specifically, the first cutting surfaces 211 of the two cutting edges 21 are arranged facing each other and are both inclined, forming a shearing structure with a concave center; the angle between the second cutting surface 212 and the height direction of the cutting edge 21 (i.e., the longitudinal extension direction from the blade bottom 21a to the blade tip 21b) is α1, where α1 satisfies 0°≤α1≤2.2°. The preferred range of the included angle α can be found in the aforementioned experimental data, and will not be elaborated further here.

[0039] Preferably, α1 can be selected as 0°, 0.5°, 1°, 1.5° or 2.2°; when α1=0°, the second cutting surface 212 is completely parallel to the height direction of the cutting edge 21, which is suitable for die-cutting ultra-thin materials 3 to be die-cut with a thickness of 12μm-18μm, and can minimize the lateral compression of the cutting edge on the material to be die-cut; when α1=1°, the second cutting surface 212 is slightly inclined, which is suitable for conventional materials 3 to be die-cut with a thickness of 25μm-35μm, taking into account both waste removal smoothness and cutting stability; when α1=2.2°, it can be used to die-cut thick materials 3 to be die-cut with a thickness of 50μm-70μm, enhancing the structural strength of the cutting edge 21 and avoiding deformation of the cutting edge during cutting.

[0040] This embodiment utilizes the relatively inclined design of two spaced-apart cutting edges 21 and the first cutting surface 211 to form a step-by-step shearing structure, dispersing the concentrated stress of traditional flat-blade cutting and effectively solving the problems of severe edge turning and burrs on the forming material in the prior art. The small included angle design of the second cutting surface 212 reduces the contact area with the waste material 32. Combined with the sharp structure of the blade edge 21b, it makes it easy for the waste material 32 to separate from the cutting edge, optimizing the waste removal effect and reducing the short circuit risk caused by the residue of waste material 32. The cutting edge 21 made of cemented carbide material, combined with a reasonable structural design, improves the wear resistance of the cutting edge, extends the service life of the roller cutter 20, reduces the frequency of downtime for replacement, and improves production efficiency. On the other hand, the small included angle design of the second cutting surface 212 ensures that when the cutting edge 21 cuts the material to be die-cut 3, the cross-section of the material to be die-cut 3 forms a small arc. The blade edge 21b angle of 0°-2.2° minimizes the deformation of the forming material, ensuring an effective adhesion area between the forming material and the base film, making it less likely to be carried away or displaced during waste removal.

[0041] Please see Figure 2 Furthermore, the included angle β1 between the first cutting face 211 and the cutting edge 21 in the height direction satisfies 24.1°≤β1≤30.3°. Specifically, the included angle β1 between the first cutting face 211 and the cutting edge 21 in the height direction satisfies 24.1°≤β1≤30.3°. The height direction of the cutting edge 21 is the longitudinal central axis direction from the bottom of the blade 21a to the edge 21b. The included angle β1 between the first cutting face 211 and this direction can be controlled by precision grinding, with an angle error ≤±0.5°, ensuring that the first cutting faces 211 of the two cutting edges 21 form a symmetrical concave shearing structure. The experimental data for the β angle are shown in the table below.

[0042]

[0043] As shown in the table above, when 24.1°≤β≤30.3°, the waste discharge efficiency of waste material 32 remains above 98.5%, thus keeping the waste discharge within a relatively optimal range. Furthermore, when β=25°, the waste discharge efficiency of waste material 32 is at its highest, remaining within the range of 99.6°.

[0044] If β < 24.1, the cutting edge 21 will result in a low bending deformation rate of the waste 32 when cutting it. This will lead to a large contact area between the waste 32 and the bottom membrane. Consequently, when the waste discharge membrane recycles the waste 32, the waste 32 will still easily adhere to the bottom membrane, resulting in a low waste discharge efficiency.

[0045] If β > 30.3, the angle value of β is too large, which makes the cutting edge 21 not sharp enough. Also, the height of the cutting cavity 23 between the cutting edge 21 and the waste 32 is reduced. Both of these factors make it easy for the cutting edge 21 to fail to cut the die-cutting material 3, resulting in a connection between the molding material 31 and the waste 32. This increases the difficulty of the waste removal membrane in recycling the waste 32 and reduces the waste removal efficiency of the waste 32.

[0046] In summary, by further optimizing the angle of β, when 24.6°≤β≤28.2°, the bending deformation range of the waste 32 is increased, and the sharpness of the die-cutting of the blade 21 is improved, so as to further reduce the probability that the blade 21 cannot cut the material 3 to be die-cut, thereby further improving the waste discharge efficiency of the waste 32.

[0047] The angle β1 can be exemplarily 24.1°, 26.4°, 27.2°, 28.5°, 29.3° or 30.3°, or other angles within this range. The specific value of β1 can be adjusted according to the thickness of the material 3 to be die-cut and the line accuracy, and there is no specific limitation on it. For example, when β1=24.1°, the first cutting surface 211 has a larger tilt angle, resulting in strong shear force concentration. It is suitable for die-cutting thin materials 3 of 18μm-25μm and fine lines with a line width ≤0.1mm. It can quickly cut the forming material 31 and reduce edge plastic deformation. When β1=28.5°, it balances shear force and cutting edge support strength, making it suitable for medium-thick materials 3 of 35μm-50μm. It can balance cutting quality and the durability of the roller cutter 20. When β1=30.3°, the first cutting surface 211 has a smaller tilt angle, resulting in more dispersed cutting edge force. It is suitable for die-cutting thick materials 3 of 70μm and conventional lines with a line width ≥0.3mm. It can effectively avoid cutting edge damage when cutting thick materials 3. By limiting the included angle range of the first cutting surface 211, the distribution of shearing force is made more suitable for the cutting requirements of materials 3 to be die-cut with different thicknesses. This ensures sufficient shearing sharpness to reduce burrs and flanging, while avoiding insufficient cutting edge strength due to an excessively small angle or extrusion deformation due to an excessively large angle. The design of the β1 angle, in conjunction with the small included angle design of the second cutting surface 212 (α1 angle design), further optimizes the stress dispersion effect, improves the flatness of the cut edge of the forming material 31, and further extends the service life of the roller cutter 20.

[0048] Please see Figure 2 and Figure 3 Furthermore, the distance between the blade edges 21b of the two blade portions 21 ranges from 0.2mm to 0.5mm.

[0049] Specifically, the distance between the blade edges 21b of the two cutting edges 21 ranges from 0.2mm to 0.5mm, and exemplary values ​​can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, and 0.5mm. The distance is the shortest horizontal distance between the tips of the blade edges 21b of the two cutting edges 21 (see reference...). Figure 3 The specific value of the spacing (D2) can be determined according to the width requirements of the material 3 to be die-cut, and there is no specific limitation on it. For example, when the spacing is 0.2mm, it is suitable for scenarios where narrow waste material 32 (width ≤ 0.2mm) is generated during die-cutting, such as the die-cutting of narrow circuit structures like fuses, which can avoid secondary friction caused by the waste material 32 shaking in the die cavity 23; when the spacing is 0.35mm, it is suitable for medium-width waste material 32 generated by conventional circuit die-cutting, which can balance waste removal efficiency and the structural strength of the die cavity 23; when the spacing is 0.5mm, it is used for wide waste material 32 generated by die-cutting wide circuits, which can provide sufficient space in the die cavity 23 and avoid the waste material 32 getting stuck.

[0050] By limiting the distance between the blade edges 21b of the two cutting edges 21 to between 0.2mm and 0.5mm, the spacing design can be precisely matched to the width of the waste material 32, allowing the waste material 32 to smoothly enter the cutting cavity 23 between the two cutting edges 21. This avoids problems such as wire snagging, chip jamming, or deformation of the waste material 32, solving the pain point of poor waste discharge in the prior art. At the same time, the reasonable spacing range ensures the structural strength of the cutting edges 21, avoiding insufficient rigidity of the cutting edges 21 due to excessive spacing, or failure of the waste material 32 to be discharged smoothly due to excessive spacing, further improving the stability of the die-cutting process and the product qualification rate.

[0051] Furthermore, the height of the roller cutter 20 ranges from 1mm to 1.5mm. Specifically, the height range of the roller cutter 20 is limited to between 1mm and 1.5mm. The height of the roller cutter 20 is the vertical distance from the outer peripheral surface of the cylindrical roller 10 to the tip of the cutter edge 21b (see reference). Figure 3 (H in the text). The specific value of the roller cutter 20 height is adapted to the total thickness of the FDC flexible circuit board. For example, when the height is 1mm, it is suitable for thin circuit boards with a total thickness ≤0.8mm, which can accurately cut the material to be die-cut 3 without damaging the underlying substrate; when the height is 1.2mm, it is suitable for conventional circuit boards with a total thickness of 0.8mm-1.0mm, which can meet the die-cutting requirements of multi-layer composite structures; when the height is 1.5mm, it is used for thick circuit boards with a total thickness of 1.0mm-1.2mm, ensuring that the material to be die-cut 3 layers are completely cut off while avoiding deformation caused by excessive cutting into the substrate.

[0052] By limiting the height range of the roller cutter 20, precise control of the die-cutting depth can be achieved, effectively solving the problems of insufficient cutting depth leading to incomplete cutting of the material to be die-cut 3 or excessive cutting damaging the substrate in the existing technology. Furthermore, the height range of 1mm-1.5mm takes into account both the structural rigidity and die-cutting flexibility of the roller cutter 20, avoiding the problem of the roller cutter 20 being easy to bend due to too small a height or the problem of excessive die-cutting pressure due to too large a height, thus improving the adaptability of die-cutting circuit boards of different thicknesses and the stability of cutting quality.

[0053] Please see Figures 5 to 7 In another embodiment, the second structural design of the blade portion 21 is as follows: the two first cutting surfaces 211 of the two blade portions 21 are arranged facing each other, the two second cutting surfaces 212 of the two blade portions 21 are arranged away from each other and inclined, and the included angle between the first cutting surfaces 211 and the blade portion 21 in the height direction is α2, which satisfies 0°≤α2≤2.2°.

[0054] Specifically, each blade portion 21 has a first cutting surface 211 and a second cutting surface 212, both of which are flat planar structures (or can be designed as micro-arc surfaces to improve stress dispersion). The ends of the first cutting surface 211 and the second cutting surface 212 away from the circular roller 10 are connected to form a blade edge 21b. The two first cutting surfaces 211 of the two blade portions 21 are arranged facing each other, that is, the two first cutting surfaces 211 are distributed face to face, together forming the central blade cavity 23; the two second cutting surfaces 212 of the two blade portions 21 are arranged away from each other, that is, the two second cutting surfaces 212 are distributed back to back, and both are inclined relative to the height direction of the blade portion 21 (the longitudinal extension direction from the blade bottom 21a to the blade edge 21b).

[0055] The included angle α2 between the first cutting face 211 and the cutting edge 21 in the height direction satisfies 0°≤α2≤2.2°, and the angle error ≤±0.5°. Accuracy can be guaranteed through precision grinding. The preferred range of the included angle α can be found in the aforementioned experimental data and will not be elaborated further here. Preferably, α2 can be selected from 0°, 0.5°, 1°, 1.5°, or 2.2°. For example, when α2=0°, the first cutting face 211 is completely parallel to the height direction of the cutting edge 21, and the side wall of the cavity 23 is a vertical structure, which is suitable for die-cutting thin materials 3 of 18μm-25μm and fine lines with a line width of 0.1mm-0.15mm. This can minimize the lateral extrusion of the forming material by the first cutting face 211 and avoid narrowing or warping defects in fine lines. When α2=1°, the first cutting face 211 has a slightly inclined concave structure, which is suitable for medium-thick materials 3 of 35μm-50μm. While dispersing shear stress, it can guide the waste material 32 to converge towards the center of the cavity 23, improving the smoothness of waste discharge. When α2=2.2°, the first cutting face 211 has a slightly larger inclination angle, which is suitable for die-cutting thick materials 3 of 50μm-70μm. This enhances the support strength of the root of the cutting edge 21 and avoids deformation of the first cutting face 211 when cutting thick materials 3.

[0056] The arrangement of two first cutting surfaces 211 facing each other forms a regular concave cutting cavity 23. Combined with a small included angle design of 0°≤α2≤2.2°, this concentrates cutting stress at the tip of the blade 21b, effectively dispersing localized stress during die-cutting and controlling the flange height of the die-cutting material 3 to ≤15μm, significantly improving the problem of excessive flange height in existing technologies. Furthermore, the design of the two second cutting surfaces 212 facing away from each other and inclined reduces the contact area with the waste material 32, while simultaneously improving the efficiency of the waste material 32. It provides a smooth ejection channel, avoiding waste material 32 sticking to the cutting edge and causing waste discharge jamming; secondly, the small included angle structure of the first cutting face 211 improves the impact resistance of the cutting edge 21, and with the cemented carbide material (hardness ≥ HRC62), it avoids the cutting edge from rolling or chipping during cutting, and extends the tool life; in addition, the overall structure of the cutting edge 21 is adaptable to the die-cutting requirements of materials 3 of different thicknesses and fine circuits, with strong versatility, especially suitable for the mass production of high-precision FDC circuit boards, which can reduce the product defect rate.

[0057] Please see Figure 5 and Figure 6 Furthermore, the included angle between the second cutting surface 212 and the cutting edge 21 in the height direction is β2, satisfying 24.1°≤β2≤30.3°. Similarly, the preferred range of the included angle β can be found in the aforementioned experimental data, and will not be elaborated further here.

[0058] Furthermore, the angle of β2 can be, for example, 24.1°, 26.4°, 27.2°, 28.5°, 29.3° or 30.3°, or other angles within this range. The specific value of β2 can be adjusted according to the thickness of the material 3 to be die-cut and the line accuracy, and there is no specific limitation on this. For example, when β2=24.1°, the second cutting face 212 has a smaller tilt angle and higher cutting edge sharpness, making it suitable for die-cutting fine lines with a line width ≤0.2mm. It can quickly cut the forming material 31 with an edge burr height ≤10μm. When β2=28.5°, it balances cutting edge sharpness and structural strength, adapting to the lines of the die-cutting material 3 with a conventional line width of 0.2mm-0.3mm, balancing cutting quality and tool durability. When β2=30.3°, the second cutting face 212 has a moderate tilt angle and better structural strength, making it suitable for die-cutting wide lines with a line width ≥0.3mm or the substrate of the die-cutting material 3 with an uneven surface. It avoids chipping of the cutting edge due to uneven force and reduces the extrusion deformation when cutting thick die-cutting material 3.

[0059] To further enhance structural synergy, in this embodiment, the included angle α2 of the first cutting face 211 and the included angle β2 of the second cutting face 212 can be appropriately matched. For example, α2=0° and β2=24.1° are suitable for 18μm thin die-cutting material with fine lines (3+0.1mm), minimizing deformation and burrs; α2=1° and β2=28.5° are suitable for 35μm medium-thick die-cutting material with conventional lines (3+0.25mm), balancing efficiency and quality; α2=2.2° and β2=30.3° are suitable for 70μm thick die-cutting material with wide lines (3+0.3mm), ensuring cutting stability and tool life. Furthermore, the surface of the second cutting face 212 can be mirror-polished, with a surface roughness Ra≤0.1μm, thereby reducing frictional resistance with the waste material 32 and further optimizing waste removal.

[0060] In this embodiment, by limiting the angle range of β2 (24.1°≤β2≤30.3°), it works synergistically with the small included angle design of α2, ensuring both the sharpness of the second cutting edge 212 (β2≤30.3° avoids excessive bluntness leading to extrusion deformation) and improving the structural strength of the cutting edge 21 (β2≥24.1° avoids excessive sharpness leading to chipping). The sharp cutting edge at β2=24.1° effectively reduces burrs in fine lines, while the strong and tough structure at β2=30.3° can withstand the high cutting stress of thick die-cutting materials 3, solving the problem of sharpness in the prior art. The inherent contradiction between strength and efficiency is addressed; furthermore, the synergy of β2 and α2 results in more uniform stress distribution during die-cutting, smoother edges without burrs, and a significant reduction in waste material residue compared to a single-angle design, thus reducing the risk of short circuits. Simultaneously, the optimized blade angle reduces cutting pressure, minimizing plastic deformation of the die-cut material and improving circuit dimensional accuracy. The overall structure further enhances the versatility and stability of the components, making them suitable for mass production of high-precision FDC circuit boards of various specifications, especially suitable for scenarios with high requirements for cutting quality and production efficiency, thereby reducing production and maintenance costs.

[0061] Please see Figure 2 or Figure 5 In one embodiment, the width of the cutting edge 21 gradually decreases from the bottom 21a to the edge 21b. Specifically, the width of the cutting edge 21 gradually decreases from the bottom 21a to the edge 21b. The cross-section of the cutting edge 21 has a wedge-shaped structure. The cutting edge 21 can be made of cemented carbide. The wedge-shaped structure can reduce the contact area with the material to be die-cut 3 while ensuring the strength of the cutting edge, thereby reducing the frictional resistance during the cutting process. It should be noted that the bottom 21a refers to the bottom of the cutting edge 21, not the bottom of the entire roller cutter 20 (that is, if the roller cutter 20 also includes a blade base 22, the bottom 21a does not refer to the bottom of the blade base 22, but rather to the part where the cutting edge 21 and the blade base 22 are connected).

[0062] In this embodiment, the wedge-shaped cutting edge 21 reduces ineffective contact with the die-cutting material 3 during cutting, reduces frictional loss and thermal effects, and alleviates the problems of lattice changes and strength reduction caused by frictional heat generation in the die-cutting material 3. The width gradient design allows stress to be reasonably transferred from the bottom 21a to the edge 21b, avoiding local stress concentration at the cutting edge and extending the life of the roller cutter 20. At the same time, the reduced contact area makes it easier for the waste material 32 to separate from the cutting edge, further optimizing the waste removal effect and reducing the residue of waste material 32.

[0063] Please see Figure 3 or Figure 6In one embodiment, the roller cutter 20 further includes a cutter base 22, one end of which is connected to the outer periphery of the cylindrical roller body 10, and the other end is connected to two cutting edges 21. Specifically, the roller cutter 20 further includes a cutter base 22, which is made of the same hard alloy material or alloy steel material as the cutting edges 21, and is preferably integrally formed with the cutting edges 21 to ensure structural integrity. One end of the cutter base 22 is fixedly connected to the outer periphery of the cylindrical roller body 10 by welding or integral forming. During welding, a multi-layer, multi-pass low-current welding process is used to avoid welding deformation; the other end is fixedly connected to the blade base 21a of the two cutting edges 21, and the connecting surface is ground to ensure a fitting gap ≤0.01mm. The structure of the cutter base 22 is annular or strip-shaped. When multiple roller cutters 20 are provided on the cylindrical roller body 10, the cutter base 22 is a strip-shaped structure, distributed at intervals along the axial direction of the cylindrical roller body 10; when a single roller cutter 20 is provided, the cutter base 22 is an annular structure, surrounding the outer periphery of the cylindrical roller body 10. The thickness of the blade base 22 is 0.1mm-0.9mm, and its width is the same as the width of the blade base 21a of the blade part 21, ensuring stable support for the blade part 21.

[0064] The blade base 22 provides a stable support structure for the blade 21, solving the problem of unstable fixation and easy shaking caused by the direct connection of the blade 21 to the cylindrical roller 10 in the prior art. Furthermore, the blade base 22 disperses the force on the blade 21, transferring the cutting stress to the cylindrical roller 10 and preventing cracking caused by stress concentration at the root of the blade 21. At the same time, the transition effect of the blade base 22 makes the connection between the roller cutter 20 and the cylindrical roller 10 more secure, improving the stability of the die-cutting process and reducing dimensional deviations caused by the shaking of the blade 21.

[0065] Please see Figure 3 In one embodiment, the outer wall surface of the blade base 22 and the second blade face 212 transition smoothly. Specifically, the smooth transition adopts an arc transition or a planar transition, achieved through precision grinding to ensure no sharp edges or steps. The transition area between the outer wall surface of the blade base 22 and the second blade face 212 has no clear boundary, forming a continuous smooth surface. For example, when the radius of the transition arc is 0.15mm, the outer wall surface of the blade base 22 and the second blade face 212 form a natural and smooth connection. After the waste material 32 generated during cutting detaches from the second blade face 212, it can smoothly slide along the transition arc to the waste discharge mechanism of the equipment, avoiding accumulation at the transition point. When the blade base 22 and the cutting edge 21 are integrally formed, the machining accuracy of the transition area is easier to control, effectively avoiding step problems caused by assembly.

[0066] The smooth transition structure eliminates stress concentration points between the blade base 22 and the second blade surface 212, improving the overall structural strength of the roller blade 20 and preventing cracking caused by stress concentration at the transition. At the same time, the smooth transition surface reduces the adhesion points of the waste material 32, preventing the waste material 32 from sticking and accumulating at the transition, ensuring the smoothness of the waste discharge channel, and further solving the problems of waste discharge jamming and waste material 32 residue. In addition, the smooth surface reduces airflow resistance during the cutting process and reduces the impact of air turbulence on the stability of the die-cutting material 3.

[0067] Please see Figure 3 and Figure 4 In one embodiment, a blade cavity 23 is formed between the two blade portions 21. The bottom width of the blade cavity 23 is D1, and the top width of the blade cavity 23 is D2, satisfying 2*D1≤D2≤4*D1; or, The length range of D1 is 0.08mm-0.14mm, and the length range of D2 is 0.2mm-0.5mm.

[0068] Specifically, in this embodiment, the two first cutting surfaces 211 of the two cutting edges 21 face each other and are inclined, while the two second cutting surfaces 212 of the two cutting edges 21 face each other are opposite to each other. A blade cavity 23 is formed between the two cutting edges 21. The blade cavity 23 is a hollow area enclosed by the two first cutting surfaces 211 and the surface of the blade base 22 near the cutting edge 21, and has an inverted trapezoidal or flared structure. The bottom width of the blade cavity 23 is D1 (i.e., the length of the upper surface of the blade base 22 between the two cutting edges 21), and the top width of the cavity is D2 (i.e., the distance between the two blade edges 21b), satisfying 2D1≤D2≤4D1; or, the length of D1 ranges from 0.08mm to 0.14mm, and the length of D2 ranges from 0.2mm to 0.5mm.

[0069] For specific examples, when D1 = 0.1 mm, D2 can be selected as 0.2 mm (2D1), 0.3 mm (3D1), or 0.4 mm (4*D1) to form blade cavities 23 with different degrees of flaring; when D1 = 0.08 mm, D2 = 0.2 mm; when D1 = 0.14 mm, D2 = 0.5 mm. The inner wall of the blade cavity 23 (i.e., the surface of the first blade face 211 and the blade base 22 near the cutting edge 21) can be mirror-polished with a surface roughness Ra ≤ 0.1 μm, thereby reducing the friction between the waste material 32 and the cavity wall.

[0070] In this embodiment, the flared blade cavity 23 structure provides ample space for the waste material 32 and a smooth discharge channel, conforming to the shape of the waste material 32 after cutting, avoiding the waste material 32 from being squeezed, deformed, or stuck in the cavity, and facilitating the discharge of the waste material 32; the ratio of D1 to D2 ensures that the flaring angle of the blade cavity 23 is reasonable, which not only ensures the structural strength of the blade part 21, but also allows the waste material 32 to be discharged quickly under its own weight and the negative pressure of the equipment; the smooth cavity wall further reduces the risk of waste material 32 sticking, reduces the short circuit hazard caused by waste material 32 residue, and further improves the product qualification rate.

[0071] Please see Figure 6 and Figure 7 In another embodiment, a blade cavity 23 is formed between the two blade portions 21. The bottom width of the blade cavity 23 is D1, and the top width of the blade cavity 23 is D2, satisfying D1≤D2≤1.5*D1; or, The length range of D1 is 0.2mm-0.6mm, and the length range of D2 is 0.2mm-0.65mm.

[0072] Specifically, in this embodiment, the two first cutting surfaces 211 of the two cutting edges 21 are arranged facing each other, and the two second cutting surfaces 212 of the two cutting edges 21 are arranged away from each other and at an angle. The blade cavity 23 is formed by the two first cutting surfaces 211 and the blade bottom 21a (or the upper surface of the blade base 22). The cavity bottom width D1 is the shortest distance between the two first cutting surfaces 211 at the end of the blade bottom 21a (near the side of the circular roller 10), that is, the horizontal distance at the junction of the two first cutting surfaces 211 and the blade bottom 21a; the cavity top length D2 is the shortest distance between the two first cutting surfaces 211 at the top of the cavity (near the side of the blade edge 21b), that is, the horizontal distance between the two blade edges 21b.

[0073] The bottom width of the blade cavity 23 is D1, and the top width of the blade cavity 23 is D2, satisfying D1≤D2≤1.5*D1. For example, when D1=0.2mm, D2 can be selected as 0.2mm (D1=D2, the blade cavity 23 is a rectangle of equal width), 0.24mm (1.2*D1) or 0.3mm (1.5*D1). When D1=0.2mm and D2=0.2mm, the equal width design of the blade cavity 23 avoids the wobbling of the waste material 32, which is suitable for die-cutting thin materials 3 of 18μm-25μm; when D1=0.2mm and D2=0.24mm, the flared structure guides the waste material 32 to be discharged smoothly, which is suitable for die-cutting medium-thick materials 3 of 35μm-50μm; when D1=0.2mm and D2=0.3mm, the large flared design reduces the friction between the waste material 32 and the cavity wall, which is suitable for die-cutting materials 3 of 50μm-70μm thickness.

[0074] Alternatively, the length ranges of D1 and D2 can be limited, such that the length range of D1 is 0.2mm-0.6mm and the length range of D2 is 0.2mm-0.65mm. The values ​​of D1 and D2 are exemplarily as follows: D1=0.2mm, D2=0.2mm, suitable for fine waste material 32 with a width of 0.2mm, suitable for fine line die cutting with a line width ≤0.15mm, avoiding the waste material 32 getting stuck in the cavity; D1=0.4mm, D2=0.5mm, suitable for 0.4mm wide scrap material 32, balancing the capacity and structural strength of the blade cavity 23, suitable for conventional fine line die cutting; D1=0.6mm, D2=0.65mm, suitable for 0.6mm wide scrap 32, compatible with slightly deformed scrap 32, suitable for die-cutting of uneven surface material 3 substrate, avoiding extrusion deformation of scrap 32.

[0075] In this embodiment, by defining the dimensional relationship between D1 and D2, the shape of the blade cavity 23 is highly adapted to the actual shape of the cut waste 32, providing a smooth discharge channel for the waste 32 and avoiding the problems of waste 32 jamming and deformation caused by traditional narrow cavities or unreasonable flaring. Furthermore, it adapts to the small-sized waste 32 generated by fine line die-cutting, ensuring that the blade cavity 23 is not too large, resulting in insufficient rigidity of the cutting edge 21, or too small, preventing the waste 32 from being contained. Simultaneously, the dimensional design of the blade cavity 23 enhances the root support strength of the two cutting edges 21, preventing tilting or breakage of the cutting edges 21 due to uneven force during cutting, thus extending the tool life. The optional design of two dimensional relationships allows the component to adapt to the die-cutting needs of waste 32 of different widths and materials 3 of different thicknesses, offering strong versatility. It is particularly suitable for high-precision, small-sized waste 32 die-cutting scenarios, improving product qualification rate and production efficiency, and reducing equipment downtime cleaning and maintenance costs.

[0076] Please see Figure 1 , Figure 2 or Figure 5 In one embodiment, the circular roller 10 and the roller cutter 20 are integrally formed; or, The cylindrical roller 10, the blade base 22, and the blade 21 are integrally formed.

[0077] Specifically, the cylindrical roller 10 and the roller cutter 20 are integrally formed, or the cylindrical roller 10, the cutter base 22 and the cutting edge 21 are integrally formed. Preferably, they are made of integral cemented carbide (such as tungsten steel) by forging and CNC precision grinding. After forming, they are annealed at 550-580℃ for 48 hours to release the processing stress.

[0078] The manufacturing process of the one-piece molding structure can be as follows: First, the cemented carbide billet is forged into a cylindrical roller body 10 prototype. Then, the structure of the blade base 22 and the cutting edge 21 is machined by CNC grinding, precisely controlling the dimensional accuracy of each part. The blade edge 21b of the cutting edge 21 is processed by special grinding equipment to ensure sharpness and straightness. When the roller body 10 is made of alloy steel, quasi-one-piece molding can be achieved by welding followed by overall grinding. The welded parts are inspected for flaws to ensure there are no welding defects. The one-piece molding process is not limited to the examples described above; it can also be achieved through other methods, and no specific restrictions are placed on this.

[0079] The integrated structural design eliminates the connection gaps and assembly errors between the circular roller 10 and the roller cutter 20, and between the cutter base 22 and the cutting edge 21, improving the structural accuracy and rigidity of the entire circular cutter assembly and solving the problem of insufficient cutting accuracy caused by assembly errors in existing split structures. The stress distribution of the overall structure is more uniform, avoiding stress concentration at the connection points and significantly improving the service life and impact resistance of the roller cutter 20. At the same time, it further reduces assembly steps, lowers production and maintenance costs, and eliminates the risk of loosening at the connection points, thus improving the stability of the die-cutting process.

[0080] The present invention also proposes a manufacturing and processing equipment for an integrated IC FDC flexible circuit board. The manufacturing and processing equipment for the integrated IC FDC flexible circuit board includes the aforementioned circular blade assembly 1 for the integrated IC FDC flexible circuit board. The specific structure of the circular blade assembly 1 for the integrated IC FDC flexible circuit board is as described in the above embodiments. Since the manufacturing and processing equipment for the integrated IC FDC flexible circuit board adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0081] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A circular blade assembly (1) for an integrated IC FDC flexible circuit board, characterized in that, include: Circular roller (10); and A roller cutter (20) is disposed on the outer periphery of the circular roller body (10); the roller cutter (20) includes two spaced-apart blade portions (21); each blade portion (21) has a first blade surface (211) and a second blade surface (212), the first blade surface (211) and the second blade surface (212) are connected at one end away from the circular roller body (10) to form a blade edge (21b); Among them, the two first cutting surfaces (211) or the two second cutting surfaces (212) of the two blade portions (21) have an angle of α with the perpendicular line from the blade edge (21b) to the axis of the circular roller (10), satisfying 0°≤α≤2.2°.

2. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 1, characterized in that, The two first cutting surfaces (211) of the two blade portions (21) are facing each other and are inclined, and the two second cutting surfaces (212) of the two blade portions (21) are facing away from each other. The included angle between the second cutting surface (212) and the blade portion (21) in the height direction is α1, which satisfies 0°≤α1≤2.2°.

3. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 2, characterized in that, The included angle between the first cutting surface (211) and the cutting edge (21) in the height direction is β1, which satisfies 24.1°≤β1≤30.3°.

4. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 3, characterized in that, The distance between the blade edges (21b) of the two blade portions (21) ranges from 0.2 mm to 0.5 mm; and / or, The height range of the roller cutter (20) is 1mm-1.5mm.

5. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 1, characterized in that, The two first cutting surfaces (211) of the two blade portions (21) are arranged facing each other, and the two second cutting surfaces (212) of the two blade portions (21) are arranged away from each other and inclined. The included angle between the first cutting surface (211) and the blade portion (21) in the height direction is α2, which satisfies 0°≤α2≤2.2°.

6. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 5, characterized in that, The included angle between the second cutting surface (212) and the cutting edge (21) in the height direction is β2, which satisfies 24.1°≤β2≤30.3°.

7. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in any one of claims 1 to 6, characterized in that, The roller cutter (20) also includes a cutter base (22), one end of which is connected to the outer periphery of the circular roller (10), and the other end is connected to the two blade portions (21).

8. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 7, characterized in that, A blade cavity (23) is formed between the two blade portions (21). The bottom width of the blade cavity (23) is D1, and the top width of the blade cavity (23) is D2, satisfying 2*D1≤D2≤4*D1; or, The length of D1 ranges from 0.08mm to 0.14mm, and the length of D2 ranges from 0.2mm to 0.5mm.

9. The circular blade assembly (1) of the FDC flexible circuit board with integrated IC as described in claim 7, characterized in that, A blade cavity (23) is formed between the two blade portions (21). The bottom width of the blade cavity (23) is D1, and the top width of the blade cavity (23) is D2, satisfying D1≤D2≤1.5*D1; or, The length of D1 ranges from 0.2mm to 0.6mm, and the length of D2 ranges from 0.2mm to 0.65mm.

10. A manufacturing and processing equipment for an integrated IC FDC flexible circuit board, characterized in that, The circular blade assembly includes the FDC flexible circuit board with integrated IC as described in any one of claims 1 to 9.

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