A forming die capable of pressing various types of Poisson's ratio superstructures

Abstract

The present invention discloses a forming die capable of pressing multiple types of Poisson's ratio superstructures, comprising a fixed structure and a cell structure; the cell structure comprises a plurality of first cells and a plurality of second cells; the plurality of first cells and the plurality of second cells are detachably connected to the fixed structure, the plurality of first cells and the plurality of second cells are alternately distributed in sequence, adjacent first cells and second cells are spaced apart, and a first cell or a second cell forms a material gap for passing material, the material gap being arranged along the distribution direction of the plurality of first cells and the plurality of second cells. This solution can form at least two types of Poisson's ratio superstructures, has good versatility, a simple structure, saves costs, and is relatively easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of Poisson's ratio superstructure forming dies, and in particular to a forming die capable of pressing various types of Poisson's ratio superstructures. Background Art

[0002] Fiber composite superstructures prepared by mold hot pressing process can not only achieve lightweight design of structures, but also have high specific strength and specific modulus, and are gradually being applied in engineering practice.

[0003] Publication number CN118322613A discloses a negative Poisson's ratio superstructure forming mold, in which the uppermost and lowermost layers of the core layer unit are alternatingly arranged semi-star-shaped cells and triangular cells to form the upper and lower surfaces of the core layer unit; and during molding, fiber-reinforced prepreg is laid on the molding end faces of the cells, and then the components are assembled and the assembly is heated. After cooling, the molding mold is removed to obtain a fiber-reinforced star-triangle composite material structure.

[0004] However, the molding die in this patent can only mold one type of Poisson's ratio superstructure, and its versatility needs to be improved. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a forming die that can press multiple types of Poisson's ratio superstructures, so as to solve the technical problem that the forming die in the prior art can only form one type of Poisson's ratio superstructure and its versatility needs to be improved.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] The present invention provides a forming die capable of pressing various types of Poisson's ratio superstructures, comprising:

[0008] fixed structures; and

[0009] The cell bar structure includes a plurality of first cell bars and a plurality of second cell bars, wherein the plurality of first cell bars and the plurality of second cell bars are alternately distributed in sequence and are respectively detachably connected to the fixed structure, adjacent first cell bars and second cell bars are arranged at intervals, and the first cell bars or the second cell bars form a material passing gap for material to pass through, and the material passing gap is arranged along the distribution direction of the plurality of first cell bars and the plurality of second cell bars.

[0010] In some embodiments, the fixing structure includes two end cells and two screw connectors. The two end cells are placed on both sides of the arrangement direction of the first cell bar and the second cell bar. The two screw connectors are respectively located at both ends of the end cells, and each screw connector is screwed on the two end cells.

[0011] In some embodiments, the end cell is provided with through holes at both ends thereof, the screw connection comprises a fixing screw and a fixing nut, the threaded end of the fixing screw is passed through two of the through holes in sequence, and the fixing nut is screwed on the threaded end of the fixing screw.

[0012] In some embodiments, the end cells, the first cell strips, and the second cell strips have the same extension direction, and their extension direction intersects with the arrangement direction of the first cell strips and the second cell strips, and the through holes are located at both ends of the end cell extension direction;

[0013] The first cell bar and the second cell bar are provided with an avoidance groove for the fixing screw to pass through.

[0014] In some embodiments, the cell strip structure further comprises two groups of cell core units, each group of the cell core units is provided with a plurality of cell core units, the cell core units include two types of cell cores, and each type of the cell cores is provided with two;

[0015] The first cell strip and the second cell strip are respectively formed by splicing two cell cores of the same type or two cell cores of different types, wherein the avoidance groove is formed between the two spliced ​​cell cores, and the groove depth is less than the thickness of the fixing screw, so as to form the material transfer gap between the two spliced ​​cell cores.

[0016] In some embodiments, one type of cell core has a first molding end surface located on two opposite sides thereof, and another type of cell core has a second molding end surface located on two opposite sides thereof, the first molding end surface is arranged as a semi-sinusoidal convex surface, and the second molding end surface is arranged as a semi-sinusoidal concave surface.

[0017] In some embodiments, the cell core is provided with a slot at the end portion in the extension direction thereof;

[0018] The fixing structure also includes a plurality of clamping arms, which respectively correspond to a plurality of groups of spliced ​​cell cores. Each clamping arm is located on the side of the fixing screw away from the cell core, and is respectively provided with a clamping block extending toward the two spliced ​​cell cores, and the clamping block is clamped in the corresponding clamping slot.

[0019] In some embodiments, the cell strip structure further includes a plurality of filling strips, and the plurality of filling strips are filled in the plurality of groups of the feed gaps at intervals, so that the filling strips and the feed gaps are alternately arranged in sequence.

[0020] In some embodiments, the forming mold capable of pressing various types of Poisson's ratio superstructures further includes two pressing plates, and the two pressing plates are clamped on both sides of the first cell bar and the second cell bar in the thickness direction.

[0021] In some embodiments, the cell strip structures are provided in multiple groups, and the multiple groups of cell strip structures are stacked in sequence along the thickness direction.

[0022] Compared with the prior art, the present invention provides a forming mold that can press various types of Poisson's ratio superstructures. Taking the example of feeding the fiber prepreg into the feed gap of the first cell strip, the fiber prepreg is first fed into the feed gap of the first cell strip at the head end, then enters between the first cell strip at the head end and the second cell strip thereafter, and then the fiber prepreg is laid on the upper surface of the second cell strip thereafter, and then enters between the second cell strip thereafter and the next first cell strip, and then fed into the feed gap of the next first cell strip, and then the above operation is repeated until the fiber prepreg extends to the upper surface of the last second cell strip; at this time, the fiber prepreg is bent to the lower surface of the last second cell strip, and then laid to the feed gap of the previous first cell strip, and laid forward in sequence until the fiber prepreg returns to the feed gap of the first cell strip at the head end again, completing the laying of the fiber prepreg, and then fixing the first cell strip and the second cell strip together through a fixing structure. After the fiber prepreg is fixed and formed, a type of Poisson's ratio superstructure can be obtained.

[0023] In this way, this solution can choose to feed the fiber prepreg into the feed gap of the first cell bar and wrap the outer surface of the second cell bar, or feed the fiber prepreg into the feed gap of the second cell bar and include the outer surface of the first cell bar according to demand, so that two types of products can be formed, the versatility is improved, and the structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an exploded view of a forming die capable of pressing various types of Poisson's ratio superstructures provided by one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 Front view of the assembly of the forming die capable of pressing various types of Poisson's ratio superstructures;

[0026] Figure 3 yes Figure 2 Schematic diagram of the three first cell strips arranged in sequence;

[0027] Figure 4 is an exploded view of a forming die capable of pressing various types of Poisson's ratio superstructures provided by another embodiment of the present invention;

[0028] Figure 5 yes Figure 4 Front view of the assembly of the forming die capable of pressing various types of Poisson's ratio superstructures;

[0029] Figure 6 yes Figure 5 Schematic diagram of two types of second cell strips (three are shown) arranged alternately in sequence;

[0030] Figure 7 yes Figure 6 Schematic diagram of the cell cores in the figure combining to form the first cell stripe;

[0031] Figure 8 yes Figure 1 A schematic diagram of a forming die capable of pressing various types of Poisson's ratio superstructures without showing a pressing plate;

[0032] Figure 9 yes Figure 8 Schematic diagram of the first cell strip (setting the card slot);

[0033] Figure 10 yes Figure 8 Schematic diagram of the first cell strip (without a slot) being filled with a filling strip;

[0034] Figure 11 yes Figure 8 A partial exploded diagram of a forming die capable of pressing various types of Poisson's ratio superstructures;

[0035] Figure 12 yes Figure 9 Front view of the first cell stripe in FIG;

[0036] Figure 13 yes Figure 10 Front view of the first cell stripe in FIG;

[0037] Figure 14 yes Figure 9 Schematic diagram of the middle clamping arm and clamping block;

[0038] Figure 15 yes Figure 4 Schematic diagram of a double-concave honeycomb negative Poisson's ratio superstructure pressed by a forming die capable of pressing various types of Poisson's ratio superstructures during multi-layer bonding;

[0039] Figure 16 yes Figure 1 Schematic diagram of the sinusoidal quasi-zero Poisson's ratio superstructure pressed by the forming mold that can press various types of Poisson's ratio superstructures during multi-layer bonding.

[0040] Description of reference numerals:

[0041] 1. Cell core; 1a. Avoidance groove; 1b. Clamping groove; 1c. Material transfer gap; 11. First forming end face; 12. Second forming end face; 13. Semi-sinusoidal convex cell; 14. Semi-sinusoidal concave cell; 2. First cell strip; 3. Second cell strip; 4. Filling strip; 5. Fixed structure; 51. End cell; 51a. Through hole; 52. Fixed screw; 53. Fixed nut; 54. Clamping arm; 55. Clamping block; 6. Pressing plate; 7. Double concave honeycomb negative Poisson's ratio superstructure; 8. Sinusoidal quasi-zero Poisson's ratio superstructure. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] In order to solve the technical problem that a forming mold can only form one type of Poisson's ratio superstructure and its versatility needs to be improved, the present invention provides a forming mold that can press multiple types of Poisson's ratio superstructures. It can form two types of Poisson's ratio superstructures, has good versatility, a simple structure, saves costs, and is relatively easy to operate.

[0044] See also Figures 1 to 6 , Figures 1 to 6 This is a structural schematic diagram of a forming mold that can press various types of Poisson's ratio superstructures in the present invention. The forming mold that can press various types of Poisson's ratio superstructures includes a fixed structure 5 and a cell bar structure; the cell bar structure includes a plurality of first cell bars 2 and a plurality of second cell bars 3, and the plurality of first cell bars 2 and the plurality of second cell bars 3 are alternately distributed in sequence and are detachably connected to the fixed structure 5 respectively. Adjacent first cell bars 2 and second cell bars 3 are arranged at intervals, and the first cell bars 2 or the second cell bars 3 form a material passing gap 1c for material to pass through, and the material passing gap 1c is arranged along the distribution direction of the plurality of first cell bars 2 and the plurality of second cell bars 3.

[0045] The present invention provides a forming mold that can press various types of Poisson's ratio superstructures. Taking the example of feeding the fiber prepreg into the feed gap 1c of the first cell strip 2, the fiber prepreg is first fed into the feed gap 1c of the first cell strip 2 at the head end, then enters between the first cell strip 2 at the head end and the second cell strip 3 thereafter, and then the fiber prepreg is laid on the upper surface of the second cell strip 3 thereafter, and then enters between the second cell strip 3 thereafter and the next first cell strip 2, and then fed into the feed gap 1c of the next first cell strip 2, and then the above operation is repeated until the fiber prepreg extends to the upper surface of the last second cell strip 3; at this time, the fiber prepreg is bent to the lower surface of the last second cell strip 3, and then laid to the feed gap 1c of the previous first cell strip 2, and laid forward in sequence until the fiber prepreg returns to the feed gap 1c of the first cell strip 2 at the head end again, completing the laying of the fiber prepreg, and then fixing the first cell strip 2 and the second cell strip 3 together by a fixing structure. After the fiber prepreg is fixed and formed, a type of Poisson's ratio superstructure can be obtained.

[0046] In this way, this solution can choose to feed the fiber prepreg into the feed gap 1c of the first cell bar 2 and wrap the outer surface of the second cell bar 3, or feed the fiber prepreg into the feed gap 1c of the second cell bar 3 and include the outer surface of the first cell bar 2 according to demand, so that two types of products can be formed, the versatility is improved, and the structure is simple and the operation is convenient.

[0047] In this embodiment, the fixing structure 5 is used to fix multiple cell strips during the compression molding of the fiber prepreg, thereby improving the stability of the molded structure. It should be noted that the configuration of the fixing structure 5 is not limited, as long as it can achieve a detachable connection between the multiple cell strips. In one embodiment, the material of each cell strip is set to steel, and the fixing structure 5 is set to be a magnet, which is arranged between the multiple cell strips to achieve connection. In another embodiment, the fixing structure 5 is set to be in the form of a clamping plate, which directly clamps the multiple cell strips.

[0048] In one embodiment, the fixing structure 5 includes two end cells 51 and two screw connectors. The two end cells 51 are placed on both sides of the arrangement direction of the first cell bar 2 and the second cell bar 3. The two screw connectors are respectively located at both ends of the end cells 51, and each screw connector is screwed on the two end cells 51.

[0049] In this embodiment, two end cells 51 are connected by screws to achieve the fixation of multiple cell strips. It should be understood that the molded end faces of the end cells 51 correspond to the molded end faces of the cell strips at the head and tail ends.

[0050] In one embodiment, see Figures 8 to 11 The end cell 51 is provided with through holes 51a at both ends thereof, and the screw connection member includes a fixing screw 52 and a fixing nut 53. The threaded end of the fixing screw 52 is sequentially penetrated by two through holes 51a, and the fixing nut 53 is screwed on the threaded end of the fixing screw 52.

[0051] In this embodiment, the screw connection member is configured as a fixed screw rod 52 and a fixed nut 53, which has a simple and reliable structure. Specifically, in this solution, a fixed nut 53 is provided at each end of each fixed screw rod 52 to improve the convenience of assembly and disassembly.

[0052] In one embodiment, see Figure 11 The extension direction of the end cell 51, the first cell bar 2 and the second cell bar 3 is the same, and the extension direction thereof intersects with the layout direction of the first cell bar 2 and the second cell bar 3. The through hole 51a is located at both ends of the extension direction of the end cell 51; wherein, the first cell bar 2 and the second cell bar 3 are provided with an avoidance groove 1a for the fixing screw 52 to pass through.

[0053] In this embodiment, the fixing screws 52 are inserted into the avoidance grooves 1a of the first cell bar 2 and the second cell bar 3, and the two fixing screws 52 are placed at the ends of the first cell bar 2 and the second cell bar 3 in the length direction. This achieves compactness of the mold while preventing damage to the fiber prepreg by the fixing screws 52. It should be noted that in the examples in the drawings, the length direction of the first cell bar 2 and the second cell bar 3 is indicated by F1, and the thickness direction is indicated by F2.

[0054] At the same time, the fixing screw 52 can also be used to ensure a stable gap between the cell cores 1, thereby improving the molding quality. Specifically, in one embodiment, the cell strip structure also includes two groups of cell core units, each group has a plurality of cell core units, each cell core unit includes two types of cell cores 1, and each type of cell core 1 is provided with two; the first cell strip 2 and the second cell strip 3 are respectively formed by splicing two cell cores 1 of the same type or two cell cores 1 of different types, wherein an avoidance groove 1a is formed between the two spliced ​​cell cores 1, and its groove depth is less than the thickness of the fixing screw 52, ​​so as to form a material passing gap 1c between the two spliced ​​cell cores 1.

[0055] In this embodiment, the first cell strip 2 and the second cell strip 3 are respectively formed by splicing any two cell cores 1, thereby forming three types of cell strips, namely, one type of cell strip formed by splicing two types of cell cores 1, and two types of cell strips formed by splicing the same type of cell cores 1.

[0056] It should be understood that in this embodiment, the shaped end faces formed by the two types of cell cores 1 when spliced ​​together can fit together when laid out in sequence, and the shaped end faces of the two types of second cell strips 3 formed by splicing the same type of cell cores 1 are different.

[0057] In one embodiment, see Figure 6 and Figure 7 One of the two cell cores 1 has a first molding end surface 11 located on two opposite sides thereof, and the other has a second molding end surface 12 located on two opposite sides thereof. The first molding end surface 11 is a semi-sinusoidal convex surface, and the second molding end surface 12 is a semi-sinusoidal concave surface.

[0058] It should be noted that in this solution, when the first cell strip 2 is formed by splicing two types of cell cores 1, the second cell strip 3 is also formed by splicing two types of cell cores 1, and when arranged, the two adjacent first cell strips 2 and second cell strips 3 are placed in an inverted manner relative to each other; and when the first cell strip 2 is formed by splicing the same type of cell core 1, the second cell strip 3 is formed by splicing another type of cell core 1. Specifically, in this embodiment, the two types of cell cores 1 are respectively set as semi-sinusoidal convex cells 13 and semi-sinusoidal concave cells 14. When the semi-sinusoidal convex cells 13 and the semi-sinusoidal concave cells 14 are spliced ​​together, a sinusoidal cell strip is formed, that is, the first cell strip 2 is a sinusoidal cell strip. Therefore, when the two second cell strips 3 are alternately arranged in sequence, and a gap 1c of excess material is left between the semi-sinusoidal convex cells 13, a fiber-reinforced double-concave honeycomb negative Poisson's ratio superstructure 7 can be formed. When two types of second cells 3 are alternately arranged, and a gap 1c is left between the semi-sinusoidal concave cells 14, a double-outer concave honeycomb positive Poisson's ratio superstructure can be formed. When multiple first cells 2 are alternately arranged, a fiber-reinforced sinusoidal quasi-zero Poisson's ratio superstructure 8 can be formed.

[0059] In one embodiment, see Figure 12 and Figure 14The cell core 1 is provided with a card slot 1b at the end portion in the extension direction thereof; the fixing structure 5 further includes a plurality of card arms 54, and the plurality of card arms 54 respectively correspond to a plurality of groups of spliced ​​cell cores 1, and each card arm 54 is located on the side of the fixing screw 52 away from the cell core 1, and is respectively provided with a card block 55 extending toward the two spliced ​​cell cores 1, and the card block 55 is clamped in the corresponding card slot 1b.

[0060] In this embodiment, during assembly, the two clamping blocks 55 of the clamping arm 54 can be respectively clamped in the clamping slots 1b of the two cell cores 1 in the same group, thereby improving the convenience of assembly. It should be noted that the clamping arm 54 is located on the side of the fixing screw 52 away from the cell core 1. In addition, as shown in the attached Figure 3 and 10 In the embodiment shown, the clamping grooves 1b are alternately arranged on the cell strips of the first mold core, that is, one of two adjacent first cell strips 2 is provided with a clamping groove, and the other is not provided with a clamping groove.

[0061] See also Figure 12 and Figure 13 The cell strip structure further includes a plurality of filling strips 4, and the plurality of filling strips 4 are filled in the plurality of feed gaps 1c at intervals, so that the filling strips 4 and the feed gaps 1c are arranged alternately in sequence.

[0062] In this embodiment, the thickness of the fixing screw 52 is set to be greater than the depth of the avoidance groove 1a, thereby driving a feed gap 1c between two cores 1 in the same group to allow the fiber prepreg to pass through. At the same time, to prevent the fiber prepreg from accidentally entering the feed gap 1c of the adjacent core 1 and reducing product quality, a filler strip 4 is inserted into the feed gap 1c of the adjacent core to prevent the fiber prepreg from entering and improve product quality. In this embodiment, the filler strip 4 can also be used to connect two cores 1 in the same group.

[0063] In one embodiment, the forming mold capable of pressing various types of Poisson's ratio superstructures further includes two pressing plates 6 , which are clamped on both sides of the first mold core or the second mold core in the thickness direction.

[0064] In this embodiment, after the fiber prepreg is laid and the fixing screw 52, ​​fixing nut 53, and clamping block 55 are assembled, two pressing plates 6 are placed on either side of the mold core in the thickness direction to compress the entire mold core and improve molding quality. It should be understood that the thickness direction of the cell strip structure is consistent with the thickness direction of the cell core 1 and the cell strips.

[0065] In one embodiment, the cell strip structures are provided in multiple groups, and the multiple groups of cell strip structures are stacked in sequence along the thickness direction.

[0066] See also Figure 15 and Figure 16In this embodiment, the number of core layers can be varied along the thickness of the cell strip structure as needed to create continuous sinusoidal quasi-zero Poisson's ratio superstructures 8, semi-sinusoidal double-inward concave negative Poisson's ratio honeycombs, and semi-sinusoidal double-outward concave honeycombs with any number of layers, improving practicality. Furthermore, it should be understood that the number of unit cells can also be adjusted along the cell strip layout direction to create a structure with a desired number of unit cells.

[0067] In order to better understand the present invention, the following Figures 1 to 16 The technical solution of the present invention is described as follows:

[0068] Based on the above embodiment, the specific workflow in this solution is as follows:

[0069] In this solution, the cell strip structure includes two cell cores. Each cell core 1 can be optionally spliced ​​into a group with the same type of cell core 1 or another type of cell core 1, and forms a type of cell strip when combined with another type of cell core 1, and forms a type of cell strip when combined with the same type of cell core, so that the two cell cores 1 can form two types of type-two cell strips. A plurality of type-one cell strips are arranged in sequence to form a first mold core, and two types of type-two cell strips are arranged alternately in sequence to form a second mold core, and at least one of the two adjacent groups of cell cores 1 has a material gap 1c. The first mold core and the second mold core can be optionally assembled on a fixed structure 5 and are detachably connected to the fixed structure 5. It should be noted that the adjacent first cell strips 2 and second cell strips 3 in the first mold core are relatively inverted.

[0070] In the forming mold provided by the present invention, which can press various types of Poisson's ratio superstructures, two types of cell cores 1 can be arbitrarily spliced ​​together according to needs, thereby forming three types of cell strips: one type of cell strip formed by splicing two types of cell cores 1 and two types of cell strips formed by splicing the same type of cell cores 1.

[0071] In this way, when multiple first-class cell strips are arranged alternately in sequence to form the first mold core, the forming process of the Poisson's ratio superstructure is to feed the fiber prepreg between the two cell cores 1 of the first-class cell strip, then enter between the first-class cell strip and the subsequent first-class cell strip, and then lay the fiber prepreg on the upper surface of the subsequent first-class cell strip, and then enter between the subsequent first-class cell strip and the next first-class cell strip, and then feed it into the gap between the two cell cores 1 of the next first-class cell strip, and then repeat the above operation until the fiber prepreg extends to the upper surface of the last first-class cell strip; at this time, the fiber prepreg is bent to the lower surface of the last first-class cell strip, and then laid between the two cell cores 1 of the previous first-class cell strip, and laid forward in sequence until the fiber prepreg returns to the two cell cores 1 of the first-class cell strip again, completing the fiber prepreg laying, and then fixing the first mold core through the fixing structure 5. After the fiber prepreg is fixed and formed, a type of Poisson's ratio superstructure can be obtained.

[0072] When the two types of second-class cell strips are alternately arranged, a gap can be left between adjacent cell cores 1 of the desired type to allow for the fiber prepreg to be passed through, thereby forming two other types of Poisson's ratio superstructures. The forming process is the same as that of the first core. In this way, this solution can form two cores in total, which can be selectively assembled and fixed as needed to form three types of Poisson's ratio superstructures, with good versatility. At the same time, the cell cores 1 in the two cores can be used interchangeably, reducing the manufacturing cost of the cell core 1. The structure is simple and the operation is relatively convenient.

[0073] It should be noted that the two cores 1 in each cell strip are grouped together, that is, one group of cores includes two single cores 1. Thus, a gap is left between at least one of the two adjacent groups of cores 1 for the fiber prepreg to pass through.

[0074] Furthermore, in the fiber-reinforced sinusoidal quasi-zero Poisson's ratio superstructure 8 prepared by the present invention, while each cell has a uniform wall thickness, gradient wall thickness can also be designed and prepared, where the wall thickness between core layers is arranged in a gradient. When the structure is subjected to a compressive load and compressed downward in the longitudinal direction, it does not expand or contract in the transverse direction. During this process, the structure exhibits stable energy absorption characteristics and excellent impact and vibration isolation capabilities.

[0075] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A forming die capable of pressing various types of Poisson's ratio superstructures, characterized in that: include: Fixed structure; and A cell bar structure includes a plurality of first cell bars and a plurality of second cell bars, wherein the plurality of first cell bars and the plurality of second cell bars are alternately distributed in sequence and are respectively detachably connected to the fixed structure, adjacent first cell bars and second cell bars are spaced apart, and the first cell bars or the second cell bars form a material passing gap for material to pass through, and the material passing gap is arranged along the distribution direction of the plurality of first cell bars and the plurality of second cell bars; Wherein, the cell strip structure further comprises two groups of cell core units, each group of the cell core units is provided with a plurality of cell core units, each of the cell core units comprises two types of cell cores, and each type of the cell cores is provided with two; The first cell stripe and the second cell stripe are respectively formed by splicing two cell cores of the same species or two cell cores of different species; One type of cell core has first molding end surfaces located on opposite sides thereof, and another type of cell core has second molding end surfaces located on opposite sides thereof. The first molding end surfaces are arranged as semi-sinusoidal convex surfaces, and the second molding end surfaces are arranged as semi-sinusoidal concave surfaces.

2. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 1, characterized in that: The fixing structure includes two end cells and two screw connectors. The two end cells are used to be placed on both sides of the arrangement direction of the first cell bar and the second cell bar. The two screw connectors are respectively located at both ends of the end cells, and each screw connector is screwed on the two end cells.

3. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 2, characterized in that: The end cell is provided with through holes at both ends thereof, and the screw connection member includes a fixing screw and a fixing nut. The threaded end of the fixing screw is sequentially penetrated by two of the through holes, and the fixing nut is screwed on the threaded end of the fixing screw.

4. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 3, characterized in that: The end cell, the first cell strip, and the second cell strip have the same extension direction, and the extension direction thereof intersects with the arrangement direction of the first cell strip and the second cell strip, and the through holes are located at both ends of the end cell in the extension direction; The first cell bar and the second cell bar are provided with an avoidance groove for the fixing screw to pass through.

5. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 4, characterized in that: The avoidance groove is formed between the two spliced ​​cell cores, and the groove depth is smaller than the thickness of the fixing screw, so as to form the material passing gap between the two spliced ​​cell cores.

6. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 1, characterized in that: The cell core is provided with a slot at the end portion thereof in the extension direction; The fixing structure also includes a plurality of clamping arms, which respectively correspond to a plurality of groups of spliced ​​cell cores. Each clamping arm is located on the side of the fixing screw away from the cell core, and is respectively provided with a clamping block extending toward the two spliced ​​cell cores, and the clamping block is clamped in the corresponding clamping slot.

7. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 1, characterized in that: The cell strip structure further includes a plurality of filling strips, and the plurality of filling strips are filled in the plurality of groups of feed gaps at intervals, so that the filling strips and the feed gaps are alternately arranged in sequence.

8. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 1, characterized in that: The forming die capable of pressing various types of Poisson's ratio superstructures further includes two pressing plates, which are clamped on both sides of the first cell bar and the second cell bar in the thickness direction.

9. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 1, characterized in that: The cell strip structures are provided in multiple groups, and the multiple groups of cell strip structures are stacked in sequence along the thickness direction.

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