Elastic thin material cutting device

Abstract

The utility model discloses an elastic thin material cutting device which is used for cutting a convex part of an elastic thin material, and the convex part is provided with a vertical side face and a convex face formed at the top end of the vertical side face. The elastic thin material cutting device comprises a lower die, an upper die and a punch, the lower die is provided with a jacking part, a male die part and a first cutting cavity, the male die part is arranged on the upper surface of the jacking part in a protruding mode, the first cutting cavity is formed in the position, corresponding to the cutting position of the male die part, of the jacking part, and the first side vertical face of the male die part inclines downwards and outwards; the included angle between the upper surface of the supporting part and the upper surface of the supporting part is an obtuse angle; the upper die is provided with a pressing part, a female die part and a second cutting cavity, the female die part is concavely arranged on the lower surface of the pressing part, the second cutting cavity is formed in the position, corresponding to the first cutting cavity, of the pressing part, the second side vertical face of the female die part inclines upwards and inwards, and the included angle between the second side vertical face of the female die part and the concave face of the female die part is an obtuse angle; the punch is movably arranged in the first cutting cavity and the second cutting cavity in a penetrating mode.

Description

Technical Field

[0001] This utility model relates to the field of product cutting and processing technology, and in particular to a cutting device for elastic thin materials. Background Technology

[0002] In some processes of processing elastic thin materials, the material needs to be formed into protrusions through hot pressing or stretching. The sidewalls of these protrusions are required to be at or very close to 90 degrees. After the protrusions are formed, a portion needs to be trimmed to fit its shape to the subsequent assembly. However, traditional cutting devices often encounter problems such as tearing, notches, or serrations when cutting these protrusions. This is mainly due to the friction generated between the vertical sidewalls of the protrusion and the vertical surface of the conforming component on the stamping device during the stamping and cutting process. See [link to relevant documentation]. Figure 8 When the protrusion is being stamped and cut, the punch 400 punches and cuts the waste material along the vertical direction, so that the vertical sidewall 121 of the protrusion 120 of the elastic thin material is subjected to force along its height direction (line force punching), which in turn causes the cut edge of the elastic thin material to be torn, forming a notch or serration, resulting in product defects. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an elastic thin material cutting device that solves the problem of tearing, gaps or serrations at the cutting edge after the convex part of the elastic thin material is cut.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: A thin elastic material cutting device is provided for cutting the protrusions of a thin elastic material. The protrusions have a vertical side surface and a convex surface formed at the top of the vertical side surface. The thin elastic material cutting device includes a lower die, an upper die, and a punch. The lower die has a supporting portion, a punch portion protruding from the upper surface of the supporting portion, and a first cutting cavity formed at a position on the supporting portion corresponding to the cutting portion of the protrusion. The first side surface of the punch portion is downward and outwardly inclined, and the angle between it and the upper surface of the supporting portion is an obtuse angle. The upper die has a holding portion, a die portion recessed on the lower surface of the holding portion, and a second cutting cavity formed at a position on the holding portion corresponding to the first cutting cavity. The second side surface of the die portion is upward and inwardly inclined, and the angle between it and the recessed surface of the die portion is a matching obtuse angle. The punch moves vertically through the first and second cutting cavities.

[0005] Furthermore, the shape of the punch portion in the horizontal projection plane is adapted to the shape of the retained portion that needs to be retained after the punch portion is cut; the first cutting cavity extends through the top holding portion in the vertical direction, and the first cutting cavity is directly opposite the cutting portion of the punch portion; the shape of the die portion in the horizontal projection plane is adapted to the shape of the retained portion, the second cutting cavity extends through the pressing portion in the vertical direction, and the second cutting cavity is directly opposite the first cutting cavity.

[0006] Furthermore, the elastic thin material includes a substrate and the protrusion formed at the outer edge of the substrate;

[0007] The protrusion has two vertical sides bent vertically upward from the substrate and a convex surface connected to the top of the two vertical sides; the inner ends of the two vertical sides intersect and face the center of the substrate, and the outer ends extend outward and are flush with the outer edge of the substrate so that the vertical sides form an L-shaped semi-frame structure on the horizontal projection plane; a portion of the protrusion near the intersection of the two vertical sides forms the retention portion, and the outer edge portion of the protrusion outside the retention portion forms the cutting portion to be cut.

[0008] Furthermore, the punch portion has two first side elevations located inside the two vertical sides, the dimensions of the two first side elevations being adapted to a section on the two vertical sides corresponding to the retained portion; the die portion has two second side elevations located outside the two vertical sides, the dimensions of the two second side elevations being adapted to the dimensions of the two first side elevations; during mold closing, the two second side elevations and the two first side elevations clamp the two vertical sides of the punch portion inside, so that the inclination angle of each vertical side is adapted to the corresponding first side elevation and second side elevation.

[0009] Furthermore, the upper surface of the top support portion has a first top support area directly opposite the area on the substrate adjacent to the vertical side surface, and a second top support area located outside the outer edge of the substrate and the protrusion. The first top support area and the second top support area enclose a closed first frame-shaped area. The first top support area is integrally connected to the outside of the two first side facades, and the included angle between the two first side facades and the first top support area is an obtuse angle.

[0010] The lower surface of the pressing part has a first pressing area facing the first pressing area and a second pressing area facing the second pressing area. The first pressing area and the second pressing area enclose a closed second frame-shaped area. The first pressing area is integrally connected to the outside of the two second side facades.

[0011] Furthermore, both the first and second cutting cavities have an inner cavity wall that coincides with the outer edge of the retained portion on the horizontal projection plane, an outer cavity wall located outside the outer edge of the cutting portion, a first end wall connecting the first end of the inner cavity wall and the outer cavity wall, and a second end wall connecting the second end of the inner cavity wall and the outer cavity wall. The inner cavity wall, the outer cavity wall, the first end wall, and the second end wall together form a cutting cavity whose shape is adapted to the cutting portion.

[0012] Furthermore, the outer edge of the retaining portion is configured to have a straight edge and an arcuate edge connected thereto, the straight edge being closer to the first end and the arcuate edge being closer to the second end, and the inner cavity wall is configured to have a straight wall surface adapted to the straight edge and an arcuate wall surface adapted to the arcuate edge.

[0013] Furthermore, the dimension of the inner cavity wall along the outer edge of the retained portion is greater than the length of the outer edge of the retained portion, so that the straight wall surface extends beyond the same end of the straight edge in the direction of the first end, and the arcuate wall surface extends beyond the same end of the arcuate edge in the direction of the second end; the first end face of the outer cavity wall and the first end face of the inner cavity wall are located in the same plane, and the second end face of the outer cavity wall and the second end face of the inner cavity wall are located in the same plane, so that both ends of the cutting cavity extend beyond the ends of the retained portion and the cutting portion along the outer edge of the retained portion, thereby making the horizontal projected area of ​​the cutting cavity larger than the area of ​​the cutting portion.

[0014] Furthermore, a cutting edge is provided on the lower end face of the punch corresponding to the connection between the retaining part and the cutting part.

[0015] Furthermore, the obtuse angle is 100 to 130 degrees.

[0016] In summary, the elastic thin material cutting device of this utility model has the following beneficial effects: By designing the first side face of the punch to be an obtuse angle greater than 90 degrees and the second side face of the die to be an obtuse angle that matches it, when the punch and die are closed, the cutting part of the protrusion is located in the cutting cavity, and the vertical side of the protrusion is sandwiched between the first side face of the punch and the second side face of the die, thereby changing the vertical state of the vertical side, making it inclined and constrained by the first and second side faces; when the punch presses the cutting part, because the vertical sidewall is inclined, the relationship between the vertical punching force and the force on the protrusion changes from the original line force punching to point force punching, solving the problems of serrated notches and local deformation after product cutting and forming, and improving product yield. Based on the elastic deformation characteristics of the product itself, after cutting, the forming part of the protrusion returns from the elastic deformation state to the original vertical state. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of an elastic thin material that needs to be cut in one embodiment of this utility model.

[0019] Figure 2 This utility model presents a schematic diagram of the structure of a cut elastic thin material in one embodiment.

[0020] Figure 3 This is a schematic diagram of the structure of the elastic thin material cutting device of this utility model.

[0021] Figure 4 yes Figure 3 Exploded view.

[0022] Figure 5 yes Figure 4 A schematic diagram of the structure of the central support section.

[0023] Figure 6 yes Figure 4 A schematic diagram of the structure of the middle pressure holding part, wherein the pressure holding surface of the pressure holding part faces upward.

[0024] Figure 7 yes Figure 4 A schematic diagram of the structure of the punch.

[0025] Figure 8 This is a schematic diagram of cutting elastic thin materials in the prior art.

[0026] The meanings of the labels in the attached diagram are as follows:

[0027] Substrate 100; outer periphery 110; protrusion 120; vertical side 121; convex surface 122; retained portion 123; retained surface 123a; retained section 123b; straight edge 1231; rounded edge 1232; cutting portion 124;

[0028] Support portion 200; First support area 201; Second support area 202; Punch portion 210; First side face 211; First cutting cavity 220; Inner cavity wall 221; Flat wall surface 2211; Outer cavity wall 222; Arc wall surface 2212; First end wall 223; Second end wall 224;

[0029] Pressing part 300; Die part 310; Second side surface 311; Recessed surface 312; Second cutting cavity 320;

[0030] Punch 400; blade 410. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] Please see Figure 1 and Figure 2 , Figure 1 An exemplary schematic diagram of a flexible thin material (hereinafter referred to as the flexible thin material) that needs to be cut is shown in one embodiment. Figure 2 A schematic diagram of the structure of the cut elastic thin material is shown.

[0035] like Figure 1 As shown, the elastic thin material is made of insulating materials with a certain degree of hardness and elasticity, such as plastics, etc. (e.g., PP, PC, etc.). In the illustrated embodiment, the elastic thin material is used to form an insulating sheet for covering the CPU. During the manufacturing process, firstly, a thin roll of material is stamped into the elastic thin material; then, it is hot-pressed to form a protrusion 120 located in the middle and outer periphery 110. The protrusion 120 (hereinafter referred to as protrusion 120) of the outer periphery 110 protrudes upward from the lower surface of the elastic thin material, thereby making the lower surface of the elastic thin material form a groove that matches the protrusion 120; then, the entire outer periphery 110 of the elastic thin material is cut (to clearly show the outer periphery 110 that needs to be cut off...). Figure 1(The cutting line is indicated by a dashed line in the image). The outer edge portion of the protrusion 120 needs to be cut off. The outer periphery 110 portion can be blanked off by multiple stamping cuts. For example, the other outer periphery 110 portions besides the protrusion 120 can be blanked off by one or more stamping cuts, or the protrusion 120 portion can be blanked off independently by stamping cuts, so that the outer edge portion of the protrusion 120 is blanked off. In the following text, the portion of the elastic thin material other than the protrusion 120 is referred to as the substrate 100, and the protrusion 120 is formed at the outer edge of the substrate 100.

[0036] The protrusion 120 has a vertical side surface 121 and a convex surface 122 formed at the top of the vertical side surface 121. Specifically, the protrusion 120 has two vertical side surfaces 121 that are bent vertically upward from the substrate 100 and a convex surface 122 connected to the top of the two vertical side surfaces 121. The angle between the vertical side surface 121 and the substrate 100 is 90 degrees or approximately 90 degrees. The inner ends of the two vertical side surfaces 121 intersect and face the center of the substrate 100, and the outer ends extend outward and are flush with the outer edge of the substrate 100, so that the vertical side surface 121 has an L-shaped semi-frame structure in the horizontal projection plane.

[0037] A portion of the protrusion 120 near the intersection of the two vertical sides 121 forms the retention portion 123 (the portion of the protrusion 120 within the dotted line). The retention portion 123 includes a portion of the protrusion 122 near the intersection (retention surface 123a) and a portion of the two vertical sides 121 near the intersection (hereinafter referred to as retention segment 123b). The outer edge portion of the protrusion 120 outside the retention portion 123 forms a cutting portion 124 (hereinafter referred to as cutting portion 124, the portion of the protrusion 120 outside the dotted line). The cutting portion 124 includes the outer edge portion of the protrusion 122 outside the retention portion 123 and a segment of the two vertical sides 121 outside the retention portion 123. In the embodiment shown, the outer edge of the retention portion 123 (the connection between the retention portion 123 and the cutting portion 124) is configured to have a straight edge 1231 and an arc edge 1232 connected thereto. The straight edge 1231 is closer to the first end of the outer edge of the retention portion 123, and the arc edge 1232 is closer to the second end of the outer edge of the retention portion 123.

[0038] Please see Figure 3 and Figure 4The elastic thin material cutting device shown is used to cut the cutting portion 124 mentioned above. The elastic thin material cutting device includes a lower die, an upper die, and a punch 400. The connection relationship between the lower die, the upper die, and the punch 400, as well as other structures of the lower die and the upper die, can be known structures. This article only describes in detail the punch and die portions that are adapted to the shape of the protrusion 120.

[0039] Please see Figure 4 , Figure 5 , Figure 6 and Figure 7 The lower mold has a supporting portion 200, a punch portion 210 protruding from the upper surface of the supporting portion 200, and a first cutting cavity 220 formed in the supporting portion 200 at a position corresponding to the cutting portion 124 of the punch portion 120. The first side surface 211 of the punch portion 210 is inclined downward and outward, and the angle between it and the upper surface of the supporting portion 200 is an obtuse angle. The upper mold has a holding portion 300, a die portion 310 recessed in the lower surface of the holding portion 300, and a second cutting cavity 320 formed in the holding portion 300 at a position corresponding to the first cutting cavity 220. The second side surface 311 of the die portion 310 is inclined upward and inward, and the angle between it and the recessed surface 312 of the die portion 310 is an obtuse angle. The punch 400 is vertically movably inserted into the first cutting cavity 220 and the second cutting cavity 320, which together form a cutting cavity body. A blade 410 is provided on the lower end face of the punch 400 at the connection point between the retaining portion 123 and the cutting portion 124. In this embodiment, the blade 410 is positioned around the outer edge of the lower end face of the punch 400.

[0040] The upper surface of the supporting portion 200 has a first supporting region 201 that is directly opposite to the region on the substrate 100 adjacent to the vertical side surface 121. Figure 5 (shown in dashed box) and the second abutting region 202 located outside the outer edges of the substrate 100 and the protrusion 120. Figure 5 In the middle, the area on the upper surface located outside the first supporting area). The first supporting area 201 and the second supporting area 202 enclose a closed first frame-shaped area. The first supporting area 201 is L-shaped, and the second supporting area 202 is used to engage with the first supporting area 201, so that the supporting part 200 and its upper surface are both defined as a rectangular frame or a rectangular-like structure, defining that the supporting part 200 has an inner cavity that extends in the vertical direction.

[0041] The shape of the punch portion 210 in the horizontal projection plane is adapted to the shape of the retained portion 123 that needs to be retained after the protrusion 120 is cut, and the punch portion 210 is formed in the inner cavity and integrally connected with the first supporting region 201. The punch portion 210 has two first side faces 211 located on the inner side of the two vertical side faces 121 (located on the side of the two vertical side faces 121 near the center of the mold when the mold is closed), and the size of the two first side faces 211 is adapted to a section of the two vertical side faces 121 corresponding to the retained portion 123 (i.e., the retained section 123b). Both first side faces 211 are inclined downward and outward, and the included angle between each first side face 211 and the first supporting region 201 is in the range of 100 to 130 degrees, preferably 110 degrees.

[0042] The first cutting cavity 220 extends vertically through the top holding portion 200; that is, the area in the inner cavity where the punch portion 210 is not provided is the first cutting cavity 220. The first cutting cavity 220 is directly opposite the cutting portion 124 of the protrusion 120, and the planar dimension of the first cutting cavity 220 is greater than or equal to the dimension of the cutting portion. Specifically, the first cutting cavity 220 has an inner cavity wall 221 (on the side near the center of the elastic thin material) that coincides with the outer edge of the retaining portion 123 on the horizontal projection plane, an outer cavity wall 222 (on the side near the outer edge of the elastic thin material) located outside the outer edge of the cutting portion 124, a first end wall 223 connecting the first ends of the inner cavity wall 221 and the outer cavity wall 222, and a second end wall 224 connecting the second ends of the inner cavity wall 221 and the outer cavity wall 222. The inner cavity wall 221, the outer cavity wall 222, the first end wall 223, and the second end wall 224 surround to form a first cutting cavity 220 whose shape is adapted to the cutting portion 124.

[0043] The inner cavity wall 221 is configured as a straight wall surface 2211 adapted to the straight edge 1231 and an arcuate wall surface 2212 adapted to the arcuate edge 1232. The dimension of the inner cavity wall 221 along the outer edge direction of the retention portion 123 is greater than the length of the outer edge of the retention portion 123, such that the straight wall surface 2211 extends beyond the same end of the straight edge 1231 in the first end direction, and the arcuate wall surface 2212 extends beyond the same end of the arcuate edge 1232 in the second end direction. The first end face of the outer cavity wall 222 and the first end face of the inner cavity wall 221 are located in the same plane, and the second end face of the outer cavity wall 222 and the second end face of the inner cavity wall 221 are located in the same plane, so that both ends of the first cutting cavity 220 extend beyond the ends of the retaining portion 123 and the cutting portion 124 along the length direction of the outer edge of the retaining portion 123, thereby making the horizontal projected area of ​​the first cutting cavity 220 larger than the area of ​​the cutting portion 124.

[0044] The lower surface of the pressing part 300 has a first pressing region 301 disposed directly opposite the first pressing region 201. Figure 6 (Seen in dashed outline) and a second pressing region 302 disposed opposite the second top holding region 202, the first pressing region 301 and the second pressing region 302 enclose a closed second frame-shaped region. Similar to the top holding portion 200, the first pressing region 301 is also L-shaped, and the second pressing region 302 is used to mate with the L-shaped first pressing region 301, so that the pressing portion 300 and its lower surface are defined as a rectangular frame or a near-rectangular structure, defining that the pressing portion 300 also has an internal cavity extending in the vertical direction.

[0045] The shape of the die portion 310 in the horizontal projection plane is also adapted to the shape of the retaining portion 123, and the die portion 310 is formed in the inner cavity of the pressing portion 300 and integrally connected with the first pressing area 301. The die portion 310 has two second side faces 311 located on the outer side of the two vertical side faces 121 (located on the side of the two vertical side faces 121 away from the center of the mold when the mold is closed), and the dimensions of the two second side faces 311 are adapted to the dimensions of the two first side faces 211. Both second side faces 311 are inclined upward and inward, and the included angle between each second side face 311 and the recessed surface 312 of the die portion 310 is in the range of 100 to 130 degrees, preferably 110 degrees.

[0046] During mold closing, the two second side facades 311 and the two first side facades 211 clamp the two vertical side facades 121 of the protrusion 120, so that the inclination angle of each vertical side facade 121 is adapted to the corresponding first side facade 211 and second side facade 311. With this configuration, when the punch 400 presses downwards against the cutting portion 124 located in the cutting cavity (first cutting cavity 220 and second cutting cavity 320), the vertical side facades 121 of the protrusion 120 are constrained into an inclined shape by the punch portion 210 and the die portion 310, changing the original vertical line-forced punching method to a point-forced punching method. This solves the problem of serrated notches and local deformation forming near the vertical side facades 121 at the cut edge after product cutting and forming. Furthermore, utilizing the elastic deformation characteristics of thin, elastic materials, the vertical side facades 121 of the protrusion 120 can automatically return to a vertical shape after cutting.

[0047] The second cutting cavity 320 extends vertically through the holding portion 300. That is, the area in the inner cavity of the holding portion 300 where the punch portion 210 is not provided is the second cutting cavity 320. The second cutting cavity 320 is directly opposite to the first cutting cavity 220. The structure, shape, and size of the second cutting cavity 320 are the same as those of the first cutting cavity 220, so they will not be described in detail here.

[0048] Based on the above embodiments, the flexible thin material cutting device of this utility model has the following beneficial effects: by designing the first side face 211 of the punch 210 as an obtuse angle greater than 90 degrees, and designing the second side face 311 of the die 310 as an obtuse angle that matches it, when the punch 210 and the die 310 are closed, the cutting portion 124 of the protrusion 120 is located in the cutting cavity, and the vertical side face 121 of the protrusion 120 is clamped on the first side face 21 of the punch 210. Between the first side face 211 and the second side face 311 of the die portion 310, the vertical state of the vertical side face 121 is changed, making it inclined under the constraints of the first side face 211 and the second side face 311. When the punch 400 presses the cutting portion 124, because the vertical side wall is inclined, the force relationship between the vertical punching force and the protrusion 120 is changed from the original line force punching to point force punching, solving the problems of serrated notches and local deformation after product cutting and forming, and improving product yield. Based on the elastic deformation characteristics of the product itself, after cutting, the forming portion of the protrusion 120 returns from the elastic deformation state to the original vertical state (the vertical side wall returns to the vertical state).

[0049] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cutting device for elastic thin material, used for cutting a protrusion of an elastic thin material, the protrusion having a vertical side surface and a convex surface formed at the top of the vertical side surface; the cutting device for elastic thin material includes a lower die, an upper die, and a punch, characterized in that: The lower mold has a supporting portion, a punch portion protruding from the upper surface of the supporting portion, and a first cutting cavity formed at the position of the supporting portion corresponding to the cutting portion of the punch portion. The first side surface of the punch portion is downward and outward inclined, and the angle between it and the upper surface of the supporting portion is an obtuse angle. The upper mold has a holding portion, a die portion recessed from the lower surface of the holding portion, and a second cutting cavity formed at the position of the holding portion corresponding to the first cutting cavity. The second side surface of the die portion is upward and inward inclined, and the angle between it and the recessed surface of the die portion is a matching obtuse angle. The punch moves vertically through the first cutting cavity and the second cutting cavity.

2. The elastic thin material cutting device as described in claim 1, characterized in that: The shape of the punch portion in the horizontal projection plane is adapted to the shape of the retained portion that needs to be retained after the punch portion is cut; the first cutting cavity passes through the top holding portion in the vertical direction, and the first cutting cavity is directly opposite the cutting portion of the punch portion; the shape of the die portion in the horizontal projection plane is adapted to the shape of the retained portion, the second cutting cavity passes through the pressing portion in the vertical direction, and the second cutting cavity is directly opposite the first cutting cavity.

3. The elastic thin material cutting device as described in claim 2, characterized in that: The elastic thin material includes a substrate and the protrusion formed at the outer edge of the substrate; The protrusion has two vertical sides bent vertically upward from the substrate and a convex surface connected to the top of the two vertical sides; the inner ends of the two vertical sides intersect and face the center of the substrate, and the outer ends extend outward and are flush with the outer edge of the substrate so that the vertical sides form an L-shaped semi-frame structure on the horizontal projection plane; a portion of the protrusion near the intersection of the two vertical sides forms the retention portion, and the outer edge portion of the protrusion outside the retention portion forms the cutting portion to be cut.

4. The elastic thin material cutting device as described in claim 3, characterized in that: The punch portion has two first side elevations located inside the two vertical sides, the dimensions of which are adapted to a section on the two vertical sides corresponding to the retained portion; the die portion has two second side elevations located outside the two vertical sides, the dimensions of which are adapted to the dimensions of the two first side elevations; during mold closing, the two second side elevations and the two first side elevations clamp the two vertical sides of the punch portion inside, so that the inclination angle of each vertical side is adapted to the corresponding first and second side elevations.

5. The elastic thin material cutting device as described in claim 4, characterized in that: The upper surface of the top support has a first top support area that is directly opposite to the area on the vertical side of the substrate, and a second top support area located outside the outer edge of the substrate and the protrusion. The first top support area and the second top support area enclose a first frame-shaped area. The first top support area is integrally connected to the outside of the two first side facades, and the included angle between the two first side facades and the first top support area is an obtuse angle. The lower surface of the pressing part has a first pressing area facing the first pressing area and a second pressing area facing the second pressing area. The first pressing area and the second pressing area enclose a closed second frame-shaped area. The first pressing area is integrally connected to the outside of the two second side facades.

6. The elastic thin material cutting device as described in claim 4, characterized in that: Both the first and second cutting cavities have an inner cavity wall that coincides with the outer edge of the retained portion on the horizontal projection plane, an outer cavity wall located outside the outer edge of the cutting portion, a first end wall connected to the first end of the inner cavity wall and the outer cavity wall, and a second end wall connected to the second end of the inner cavity wall and the outer cavity wall. The inner cavity wall, the outer cavity wall, the first end wall, and the second end wall together form a cutting cavity whose shape is adapted to the cutting portion.

7. The elastic thin material cutting device as described in claim 6, characterized in that: The outer edge of the retaining portion is configured to have a straight edge and an arcuate edge connected thereto, the straight edge being closer to the first end and the arcuate edge being closer to the second end, and the inner cavity wall is configured to have a straight wall surface adapted to the straight edge and an arcuate wall surface adapted to the arcuate edge.

8. The elastic thin material cutting device as described in claim 7, characterized in that: The inner cavity wall has a dimension greater than the length of the outer edge of the retained portion along the outer edge direction, such that the straight wall faces beyond the same end of the straight edge in the direction of the first end, and the arcuate wall faces beyond the same end of the arcuate edge in the direction of the second end; the first end face of the outer cavity wall is located in the same plane as the first end face of the inner cavity wall, and the second end face of the outer cavity wall is located in the same plane as the second end face of the inner cavity wall, such that both ends of the cutting cavity extend beyond the ends of the retained portion and the cutting portion along the outer edge of the retained portion, thereby making the horizontal projected area of ​​the cutting cavity larger than the area of ​​the cutting portion.

9. The elastic thin material cutting device as described in claim 7, characterized in that: The lower end face of the punch is provided with a blade corresponding to the connection between the retaining part and the cutting part.

10. The flexible thin material cutting device according to any one of claims 1 to 9, characterized in that: The obtuse angle is between 100 and 130 degrees.

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