Forming die capable of pressing multiple types of Poisson's ratio superstructures

Abstract

The invention discloses a forming die capable of pressing multiple types of Poisson's ratio superstructures. The forming die comprises a fixing structure and a cell strip structure. The cell strip structure comprises a plurality of first cell strips and a plurality of second cell strips; the multiple first cell strips and the multiple second cell strips are detachably connected with the fixing structure, the multiple first cell strips and the multiple second cell strips are sequentially and alternately distributed, the adjacent first cell strips and second cell strips are arranged at intervals, and material passing gaps allowing materials to pass through are formed in the first cell strips or the second cell strips. The material passing gaps are arranged in the distribution direction of the first cell strips and the second cell strips. According to the scheme, at least two types of Poisson's ratio superstructures can be formed, universality is good, the structure is simple, cost is saved, and meanwhile operation is relatively easy and convenient.

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] The fiber composite superstructure prepared by the mold hot pressing process can not only realize the lightweight design of the structure, but also has high specific strength and specific modulus, and is gradually being applied in engineering practice.

[0003] Publication No. CN118322613A discloses a negative Poisson's ratio superstructure forming mold, in which the uppermost and lowermost layers of the core layer unit are alternately 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 cell strips, and then the components are assembled and the assembly is heated. After cooling, the molding mold is removed to obtain a fiber-reinforced star-shaped-triangular 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-mentioned technical deficiencies and propose a forming mold that can press multiple types of Poisson's ratio superstructures, thereby solving the technical problem that the forming mold 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: The present invention provides a forming die capable of pressing various types of Poisson's ratio superstructures, comprising: fixed structure; and 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, the adjacent first cell bars and the 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.

[0007] 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.

[0008] In some embodiments, the end cell is provided with through holes at both ends thereof, and the screw connection comprises 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.

[0009] In some embodiments, the end cell, the first cell strip, and the second cell strip have the same extension direction, and their extension direction 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.

[0010] In some embodiments, the cell strip structure further comprises two groups of cell core units, each group of the cell core units comprises a plurality of cell core units, the cell core units comprise two types of cell cores, and each type of the cell cores comprises two; 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 to form the material transfer gap between the two spliced ​​cell cores.

[0011] In some embodiments, one type of the cell core has a first molded end surface located on two opposite sides thereof, and another type of the cell core has a second molded end surface located on two opposite sides thereof, the first molded end surface is arranged as a semi-sinusoidal convex surface, and the second molded end surface is arranged as a semi-sinusoidal concave surface.

[0012] In some embodiments, the cell core is provided with a slot at the end portion in the extension direction thereof; 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 a 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 groove.

[0013] 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.

[0014] In some embodiments, the molding die 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 strip and the second cell strip in the thickness direction.

[0015] In some embodiments, the cell strip structure is provided in a plurality of groups, and the plurality of groups of the cell strip structure are stacked in sequence along the thickness direction thereof.

[0016] 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 by a fixing structure, and a type of Poisson's ratio superstructure can be obtained after the fiber prepreg is fixed and formed.

[0017] 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

[0018] Figure 1 is an exploded view of a forming die capable of pressing various types of Poisson's ratio superstructures provided by an embodiment of the present invention; Figure 2 yes Figure 1 A front view of the assembly of a forming die capable of pressing various types of Poisson's ratio superstructures; Figure 3 yes Figure 2 Schematic diagram of the three first cell strips arranged in sequence; 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; Figure 5 yes Figure 4 A front view of the assembly of a forming die capable of pressing various types of Poisson's ratio superstructures; Figure 6 yes Figure 5 A schematic diagram of two types of second cell strips (three are shown) being arranged alternately in sequence; Figure 7 yes Figure 6 Schematic diagram of the cell cores in the figure combining into the first cell stripe; Figure 8 yes Figure 1 A schematic diagram of a forming die capable of pressing various types of Poisson's ratio superstructures when a pressing plate is not shown; Fig. 9 yes Figure 8 Schematic diagram of the first cell strip (setting the card slot); Fig.10 yes Figure 8 A schematic diagram of the first cell strip (without a slot) being filled with a filling strip; Fig.11 yes Figure 8 A partial exploded schematic diagram of a forming die capable of pressing various types of Poisson's ratio superstructures; Fig.12 yes Fig. 9 Front view of the first cell stripe in FIG. Fig.13 yes Fig.10 Front view of the first cell stripe in FIG. Fig.14 yes Fig. 9 Schematic diagram of the middle clamp arm and clamp block; Fig.15 yes Figure 4 Schematic diagram of a double concave honeycomb negative Poisson's ratio superstructure pressed by a forming mold capable of pressing various types of Poisson's ratio superstructures during multi-layer bonding; Fig.16 yes Figure 1 Schematic diagram of the sinusoidal quasi-zero Poisson's ratio superstructure pressed by the molding mold that can press various types of Poisson's ratio superstructures during multi-layer bonding.

[0019] Description of reference numerals: 1. Cell core; 1a. Avoidance groove; 1b. Clamping groove; 1c. Material passing 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

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0021] In order to solve the technical problem that a molding die can only mold one type of Poisson's ratio superstructure and its versatility needs to be improved, the present invention provides a molding die that can press multiple types of Poisson's ratio superstructures. It can mold two types of Poisson's ratio superstructures, has good versatility, simple structure, saves cost, and is relatively easy to operate.

[0022] See also Figures 1 to 6 , Figures 1 to 6 Schematic diagram of the structure of a forming mold capable of pressing various types of Poisson's ratio superstructures in the present invention. The forming mold capable of pressing 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, 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, the adjacent first cell bars 2 and the 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.

[0023] In the forming mold provided by the present invention, which 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, and 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 by a fixing structure, and a type of Poisson's ratio superstructure can be obtained after the fiber prepreg is fixed and formed.

[0024] In this way, the present 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.

[0025] In this embodiment, a plurality of cell strips are fixed by a fixing structure 5 during the compression molding of the fiber prepreg, thereby improving the stability of the molding structure. It should be noted that the setting form of the fixing structure 5 is not limited, as long as a detachable connection between a plurality of cell strips can be achieved. In one embodiment, the material of each cell strip is set to steel, and the fixing structure 5 is set to a magnet, which is laid between a plurality of cell strips to achieve connection. In another embodiment, the fixing structure 5 is set to the form of a clamp, and a plurality of cell strips are directly clamped by the clamp.

[0026] 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.

[0027] In this embodiment, two end cells 51 are connected by screws, so as to fix a plurality of cell strips. It should be understood that the molded end surface of the end cell 51 corresponds to the molded end surface of the cell strips at the head end and the tail end.

[0028] 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.

[0029] In this embodiment, the screw connection is configured as a fixed screw rod 52 and a fixed nut 53, and the structure is simple and reliable. Specifically, in this solution, a fixed nut 53 is respectively provided at both ends of each fixed screw rod 52, so as to improve the convenience of disassembly and assembly.

[0030] In one embodiment, see Fig.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 arrangement direction of the first cell bar 2 and the second cell bar 3, and 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.

[0031] In this embodiment, the fixing screws 52 are inserted into the avoidance grooves 1a of the first cell strip 2 and the second cell strip 3, and the two fixing screws 52 are placed at the ends of the first cell strip 2 and the second cell strip 3 in the length direction, so as to achieve compactness of the mold and avoid damage to the fiber prepreg by the fixing screws 52. It should be noted that in the example of the drawings, the length direction of the first cell strip 2 and the second cell strip 3 is shown as F1, and the thickness direction is shown as F2.

[0032] At the same time, the fixing screw 52 can 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 of cell core units is provided with a plurality of, 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 the avoidance groove 1a is formed between the two spliced ​​cell cores 1, and the 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.

[0033] In this embodiment, the first cell strip 2 and the second cell strip 3 are respectively formed by splicing any two cell cores 1, so that three types of cell strips can be formed, 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.

[0034] It should be understood that in this solution, the shaped end faces formed when the two cell cores 1 are spliced ​​together can fit together when arranged 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.

[0035] 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 arranged as a semi-sinusoidal convex surface, and the second molding end surface 12 is arranged as a semi-sinusoidal concave surface.

[0036] It should be noted that in this solution, when the first cell strip 2 is formed by splicing two cell cores 1, the second cell strip 3 is also formed by splicing two cell cores 1, and when arranged, the two adjacent first cell strips 2 and second cell strips 3 are relatively inverted; 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 same type of cell core 1. Specifically, in this embodiment, the two cell cores 1 are respectively set as semi-sinusoidal convex cells 13 and semi-sinusoidal concave cells 14, and when the semi-sinusoidal convex cells 13 and the semi-sinusoidal concave cells 14 are spliced ​​and combined to form sinusoidal cell strips, 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 there is a gap 1c 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 arranged alternately in sequence and a material gap 1c is left between the semi-sinusoidal concave cells 14, a double-outer concave honeycomb positive Poisson's ratio superstructure can be formed. And when multiple first cells 2 are arranged alternately in sequence, a fiber-reinforced sinusoidal quasi-zero Poisson's ratio superstructure 8 can be formed.

[0037] In one embodiment, see Fig.12 and Fig.14 The cell core 1 is provided with a card slot 1b at the end thereof in the extension direction; the fixing structure 5 also 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 a 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.

[0038] 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 illustrated embodiment, the clamping grooves 1 b 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.

[0039] See also Fig.12 and Fig.13 The cell strip structure also includes a plurality of filling strips 4, and the plurality of filling strips 4 are filled in the plurality of groups of feed gaps 1c at intervals, so that the filling strips 4 and the feed gaps 1c are arranged alternately in sequence.

[0040] 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 the two cores 1 of the same group to leave a material gap 1c for the fiber prepreg to pass through; at the same time, in order to prevent the fiber prepreg from accidentally entering the material gap 1c of the adjacent group of cores 1 and reducing the product quality, the filling strip 4 is filled in the material gap 1c of the adjacent group to prevent the fiber prepreg from entering and improve the product quality. In this embodiment, the two cores 1 of the same group can also be connected by the filling strip 4.

[0041] In one embodiment, the molding die 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.

[0042] In this embodiment, after the fiber prepreg is laid, and the fixing screw 52, ​​the fixing nut 53 and the clamping block 55 are assembled in sequence, the two pressing plates 6 are respectively placed on both sides of the mold core in the thickness direction to press the entire mold core and improve the 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 strip.

[0043] In one embodiment, a plurality of groups of cell strip structures are provided, and the plurality of groups of cell strip structures are stacked in sequence along the thickness direction thereof.

[0044] See also Fig.15 and Fig.16 In this embodiment, the number of core layers can be changed along the thickness direction of the cell strip structure according to the needs, and a continuous sinusoidal quasi-zero Poisson's ratio superstructure 8, a half-sinusoidal double concave negative Poisson's ratio honeycomb and a half-sinusoidal double concave honeycomb with any number of layers can be prepared to improve practicality. In addition, it should be understood that the number of unit cells can also be adjusted along the layout direction of the cell strips to prepare a structure with a required number of unit cells.

[0045] 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: Based on the above embodiment, the specific workflow in this solution is as follows: In this scheme, the cell strip structure includes two cell cores, each cell core 1 can be selectively spliced ​​with the same cell core 1 or another cell core 1 to form a group, and form a type of cell strip when combined with another cell core 1, and form a type of cell strip when combined with the same cell core, so that the two cell cores 1 can form two types of cell strips, a plurality of type one cell strips are arranged in sequence to form a first mold core, two types of 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 selectively assembled on the 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.

[0046] In the forming mold provided by the present invention that 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 strips 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.

[0047] In this way, when multiple first-class cell strips are arranged alternately in sequence to form the first core, the forming process of the Poisson's ratio superstructure is to feed the fiber prepreg between the two cores 1 of the first-class cell strip at the head end, then enter between the first-class cell strip at the head end and the next first-class cell strip, then lay the fiber prepreg on the upper surface of the next first-class cell strip, then enter between the next first-class cell strip and the next first-class cell strip, and then feed it into the gap between the two 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, bend the fiber prepreg to the lower surface of the last first-class cell strip, and then lay it between the two cores 1 of the previous first-class cell strip, and lay it forward in sequence until the fiber prepreg returns to the two cores 1 of the first-class cell strip at the head end again, completing the laying of the fiber prepreg, and then fixing the first core through the fixing structure 5, and a type of Poisson's ratio superstructure can be obtained after the fiber prepreg is fixed and formed.

[0048] When the two types of second-class cell strips are arranged alternately, a gap can be left between two adjacent cell cores 1 of the required type according to the needs, so that the fiber prepreg can be passed through, so that the other two types of Poisson's ratio superstructures can be formed, and the forming process is the same as the first core forming. In this way, this scheme can form two cores in total, and the two cores can be selectively assembled and fixed according to the needs, and three types of Poisson's ratio superstructures can be formed, which has good versatility; at the same time, the cores 1 in the two cores can be used interchangeably, reducing the manufacturing cost of the core 1, and the structure is simple and the operation is relatively convenient.

[0049] It should be noted that two cores 1 in each cell strip are grouped together, that is, one group of cores includes two monomer cores 1. Thus, at least one of two adjacent groups of cores 1 is left with a gap for the fiber prepreg to pass through.

[0050] In addition, in the fiber-reinforced sinusoidal quasi-zero Poisson's ratio superstructure 8 prepared by the present invention, the wall thickness of each cell is the same, and a gradient wall thickness can also be designed and prepared, that is, the wall thickness between the core layers is arranged in a gradient. When the structure is compressed downward by a compressive load in the longitudinal direction, it will not expand outward or shrink inward in the transverse direction. In this process, the structure has a stable energy absorption characteristic and has good impact and vibration isolation capabilities.

[0051] The specific implementation of the present invention described above does not constitute a limitation on the protection scope 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 protection scope 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 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, the adjacent first cell bars and the 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.

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 connections. The two end cells are used to be placed on both sides of the arrangement direction of the first cell strip and the second cell strip. The two screw connections are respectively located at both ends of the end cells, and each screw connection 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 comprises a fixing screw and a fixing nut. The threaded end of the fixing screw is penetrated by two of the through holes in sequence, 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 cell strip structure further comprises two groups of cell core units, each group of the cell core units comprises 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 comprises two; 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 to form the material transfer gap between the two spliced ​​cell cores.

6. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 5, characterized in that: One type of cell core has first molding end faces located on two opposite sides thereof, and another type of cell core has second molding end faces located on two opposite sides thereof, wherein the first molding end faces are semi-sinusoidal convex surfaces, and the second molding end faces are semi-sinusoidal concave surfaces.

7. The forming die capable of pressing various types of Poisson's ratio superstructures according to claim 5, characterized in that: The cell core is provided with a slot at the end portion in the extension direction thereof; 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 a 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 groove.

8. 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 the feed gaps at intervals, so that the filling strips and the feed gaps are arranged alternately in sequence.

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

10. 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 a plurality of groups, and the plurality of groups of cell strip structures are stacked in sequence along the thickness direction thereof.

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