Winding structure of ultrathin carbon-carbon screen blank

Abstract

The invention discloses a winding structure of an ultrathin carbon-carbon screen blank. The winding structure comprises a first handle, a second handle, a lower pressing plate, a winding plate and an upper pressing plate, wherein the lower pressing plate is connected with the upper pressing plate; the winding plate is arranged between the lower pressing plate and the upper pressing plate, and the lower surface of the winding plate is pressed against the upper surface of the lower pressing plate; the upper surface of the winding plate is pressed against the lower surface of the upper pressing plate; the first handle is connected with the side wall of the lower pressing plate; and the second handle is connected with the side wall of the upper pressing plate. The problems that in the preparation process of the ultrathin carbon-carbon screen blank, the angle of each winding layer is difficult to accurately control, alternate winding of the winding layers at different angles is difficult to consider, and the thickness of the blank is difficult to accurately control are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of preparing a carbon-carbon screen blank, and in particular relates to a winding structure of an ultra-thin carbon-carbon screen blank. Background Art

[0002] With the gradual advancement of major aerospace projects such as deep space exploration in my country, traditional chemical propulsion systems are increasingly unable to meet the needs of deep space exploration missions. In response to the new situation, long-life electric propulsion ion engines have become the preferred propulsion system for the new generation of spacecraft. Its working principle is as follows: first, the propellant is ionized using electrical energy, and the ionized ions are accelerated and drawn out during the process of passing through the grid assembly with an ultra-thin mesh structure, thereby generating long-term stable thrust. Among them, the grid assembly is the core component of the electric propulsion ion engine, and its design and manufacturing level directly determines the performance and life of the propulsion system.

[0003] At present, my country has broken through the key manufacturing technology of conventional metal molybdenum grids, but the service life is only 14,000 hours, which is still a huge gap from the 40,000 hours required for deep space exploration. In order to improve the structural performance of ultra-thin mesh structure grid components, further research on the application of advanced materials must be carried out. Carbon-carbon composite materials have the advantages of light weight, high strength, low expansion, high temperature resistance and ion sputtering resistance, and are an ideal choice to replace metal molybdenum as the material of the grid component of the electric propulsion ion engine. At present, only the Lanzhou Institute of Space Technology and Physics has completed the principle verification of 100mm-level ultra-thin carbon-carbon mesh grids in China. In order to make deep space exploration spacecraft have sufficient thrust, it is necessary to carry out research on the design and manufacturing process of large-diameter ultra-thin carbon-carbon mesh grids above 300mm.

[0004] In the prior art, there are difficulties in the preparation process of the ultra-thin carbon-carbon screen blank, such as difficulty in accurately controlling the angles of each winding layer, difficulty in balancing the alternating winding of winding layers at different angles, and difficulty in accurately controlling the thickness of the blank. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and provide a winding structure for an ultra-thin carbon-carbon screen mesh blank, thereby solving the difficulties of accurately controlling the angles of each winding layer, balancing the alternating winding of winding layers at different angles and accurately controlling the thickness of the blank during the preparation process of the ultra-thin carbon-carbon screen mesh blank.

[0006] The objective of the present invention is achieved through the following technical scheme: A winding structure of an ultra-thin carbon-carbon screen blank, comprising: a first handle, a second handle, a lower pressing plate, a winding plate and an upper pressing plate; wherein the lower pressing plate is connected to the upper pressing plate; the winding plate is arranged between the lower pressing plate and the upper pressing plate, wherein the lower surface of the winding plate is pressed against the upper surface of the lower pressing plate; the upper surface of the winding plate is pressed against the lower surface of the upper pressing plate; the first handle is connected to the side wall of the lower pressing plate; the second handle is connected to the side wall of the upper pressing plate.

[0007] The winding structure of the ultra-thin carbon-carbon screen blank further includes: a nut and a screw; wherein the screw passes through the upper pressing plate and the lower pressing plate in sequence and then is connected to the nut.

[0008] The winding structure of the ultra-thin carbon-carbon screen blank further includes: a circular gasket; wherein the circular gasket is sleeved on the outer surface of the screw, and the circular gasket is located between the nut and the lower pressing plate.

[0009] In the winding structure of the ultra-thin carbon-carbon screen blank, the winding plate includes 6 long sides and 6 short sides, wherein each long side and each short side are alternately connected.

[0010] In the winding structure of the ultra-thin carbon-carbon screen blank, a groove is provided on the long side; wherein the groove is used to facilitate cutting of the side fibers after the pre-gelation of the blank is completed.

[0011] In the winding structure of the above-mentioned ultra-thin carbon-carbon screen mesh blank, three adjacent short sides among the six short sides are respectively provided with a first tightening hole, a second tightening hole and a third tightening hole; wherein the first tightening hole, the second tightening hole and the third tightening hole are used to be fixed to the tightening device of the winding equipment when preparing winding layers in different directions; the remaining three short sides are respectively provided with a first fixing screw hole, a second fixing screw hole and a third fixing screw hole; wherein the first fixing screw hole, the second fixing screw hole and the third fixing screw hole are used to be fixed to the clamping shaft of the winding equipment when preparing winding layers in different directions.

[0012] In the winding structure of the ultra-thin carbon-carbon screen blank, the number of the screws is four, and the number of the nuts is equal to the number of the screws.

[0013] In the winding structure of the above-mentioned ultra-thin carbon-carbon screen mesh blank, the upper pressing plate is provided with a first through hole, a second through hole, a third through hole and a fourth through hole; the lower pressing plate is provided with a fifth through hole, a sixth through hole, a seventh through hole and an eighth through hole; the first screw passes through the first through hole and the fifth through hole in sequence and is connected to the first nut; the second screw passes through the second through hole and the sixth through hole in sequence and is connected to the second nut; the third screw passes through the third through hole and the seventh through hole in sequence and is connected to the third nut; the fourth screw passes through the fourth through hole and the eighth through hole in sequence and is connected to the fourth nut.

[0014] In the winding structure of the above-mentioned ultra-thin carbon-carbon screen mesh blank, the number of the first handles is two; a side wall of the lower pressure plate is provided with a first blind hole and a second blind hole, and the other side wall of the lower pressure plate is provided with a third blind hole and a fourth blind hole; one end of a first handle is embedded in the first blind hole, and the other end of a first handle is embedded in the second blind hole; one end of another first handle is embedded in the third blind hole, and the other end of a first handle is embedded in the fourth blind hole.

[0015] In the winding structure of the above-mentioned ultra-thin carbon-carbon screen mesh blank, the number of the second handles is two; a fifth blind hole and a sixth blind hole are opened on one side wall of the lower pressing plate, and a seventh blind hole and an eighth blind hole are opened on the other side wall of the lower pressing plate; one end of a second handle is embedded in the fifth blind hole, and the other end of a second handle is embedded in the sixth blind hole; one end of another second handle is embedded in the seventh blind hole, and the other end of a second handle is embedded in the eighth blind hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention switches different fixing screw holes and corresponding tightening holes to fix with the winding equipment, so as to complete the layered winding of composite materials in different winding directions and effectively improve the accuracy of the winding angle. The precise control of the thickness of the blank is achieved by placing triangular gaskets between the upper pressing plate, the lower pressing plate and the winding plate. The difficulties of precisely controlling the angles of each winding layer, taking into account the alternating winding of winding layers at different angles and precisely controlling the thickness of the blank in the preparation process of the ultra-thin carbon-carbon screen blank are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the assembly of the ultra-thin carbon-carbon screen blank winding structure;

[0020] Figure 2 for Figure 1 Middle A direction view;

[0021] Figure 3 It is a schematic diagram of a winding plate;

[0022] Figure 4 for Figure 3 Middle BB section cutaway view;

[0023] Figure 5 Schematic diagram of the upper pressure plate;

[0024] Figure 6 Schematic diagram of the lower pressure plate;

[0025] Figure 7 A schematic diagram of the handle;

[0026] Figure 8 Schematic diagram of triangular gasket. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] The process of preparing large-caliber ultra-thin carbon-carbon screen grid is roughly divided into three steps: blank winding, carbonization and finishing. Among them, the blank winding is particularly critical as the first process, and this process has the following difficulties: the winding angle of the winding layer must be accurately controlled, and the general error must not exceed 0.5°; and in order to take into account the mechanical properties in all directions, the winding angles involved in each winding layer generally have large changes and need to be wound alternately; the blank thickness must be accurately controlled.

[0029] This embodiment is designed as Figure 1 and Figure 2 The winding structure of the ultra-thin carbon-carbon screen blank shown can be used to finally obtain an ultra-thin carbon-carbon screen blank whose caliber, fiber orientation and material thickness meet the design requirements through fiber winding and subsequent pressurization solidification.

[0030] Figure 1 It is a schematic diagram of the assembly of the ultra-thin carbon-carbon screen blank winding structure; Figure 2 for Figure 1 Middle A direction view; Figure 3 It is a schematic diagram of a winding plate; Figure 4 for Figure 3 Middle BB section cutaway view; Figure 5 Schematic diagram of the upper pressure plate; Figure 6 Schematic diagram of the lower pressure plate; Figure 7 A schematic diagram of the handle; Figure 8 This is a schematic diagram of a triangular gasket.

[0031] like Figure 1 and Figure 2 As shown, the winding structure of the ultra-thin carbon-carbon screen mesh blank includes: a first handle 11, a second handle 12, a lower pressing plate 4, a winding plate 5 and an upper pressing plate 7; wherein, the lower pressing plate 4 is connected to the upper pressing plate 7; the winding plate 5 is arranged between the lower pressing plate 4 and the upper pressing plate 7, wherein the lower surface of the winding plate 5 is pressed against the upper surface of the lower pressing plate 4; the upper surface of the winding plate 5 is pressed against the lower surface of the upper pressing plate 7; the first handle 11 is connected to the side wall of the lower pressing plate 4; the second handle 12 is connected to the side wall of the upper pressing plate 7.

[0032] like Figure 1 and Figure 2 As shown, the winding structure of the ultra-thin carbon-carbon screen blank also includes: a nut 3 and a screw 6; wherein the screw 6 passes through the upper pressing plate 7 and the lower pressing plate 4 in sequence and then is connected to the nut 3.

[0033] like Figure 1 and Figure 2 As shown, the winding structure of the ultra-thin carbon-carbon screen blank further includes: a circular gasket 2; wherein the circular gasket 2 is sleeved on the outer surface of the screw 6, and the circular gasket 2 is located between the nut 3 and the lower pressing plate 4.

[0034] like Figure 3 and Figure 4 As shown, the wrapping plate 5 includes 6 long sides and 6 short sides, wherein each long side and each short side are alternately connected.

[0035] The long side is provided with a groove 8, wherein the groove 8 is used to facilitate cutting of the side fibers after the pre-gelation of the green body is completed.

[0036] Three adjacent short sides among the six short sides are respectively provided with a first tightening hole 9, a second tightening hole 10 and a third tightening hole 11; wherein the first tightening hole 9, the second tightening hole 10 and the third tightening hole 11 are used to be fixed to the tightening device of the winding equipment when preparing winding layers in different directions. The remaining three short sides are respectively provided with a first fixing screw hole 12, a second fixing screw hole 13 and a third fixing screw hole 14; wherein the first fixing screw hole 12, the second fixing screw hole 13 and the third fixing screw hole 14 are used to be fixed to the clamping shaft of the winding equipment when preparing winding layers in different directions.

[0037] The number of the screws 6 is four, and the number of the nuts 3 is equal to the number of the screws 6 .

[0038] like Figure 5 As shown, the upper pressing plate 7 is provided with a first through hole 15, a second through hole 18, a third through hole 19 and a fourth through hole 22; Figure 6 As shown, the lower pressure plate 4 is provided with a fifth through hole 23, a sixth through hole 26, a seventh through hole 27 and an eighth through hole 30; the first screw passes through the first through hole 15 and the fifth through hole 23 in sequence and is connected to the first nut; the second screw passes through the second through hole 18 and the sixth through hole 26 in sequence and is connected to the second nut; the third screw passes through the third through hole 19 and the seventh through hole 27 in sequence and is connected to the third nut; the fourth screw passes through the fourth through hole 22 and the eighth through hole 30 in sequence and is connected to the fourth nut.

[0039] The number of the first handles 11 is two. Figure 6 As shown, a side wall of the lower pressing plate 4 is provided with a first blind hole 24 and a second blind hole 25, and another side wall of the lower pressing plate 4 is provided with a third blind hole 28 and a fourth blind hole 29; one end of a first handle 11 is embedded in the first blind hole 24, and the other end of a first handle 11 is embedded in the second blind hole 25; one end of another first handle 11 is embedded in the third blind hole 28, and the other end of a first handle 11 is embedded in the fourth blind hole 29.

[0040] The number of the second handle 12 is two. Figure 5 As shown, a fifth blind hole 16 and a sixth blind hole 17 are formed on one side wall of the lower pressing plate 4, and a seventh blind hole 20 and an eighth blind hole 21 are formed on the other side wall of the lower pressing plate 4; one end of a second handle 12 is embedded in the fifth blind hole 16, and the other end of a second handle 12 is embedded in the sixth blind hole 17; one end of another second handle 12 is embedded in the seventh blind hole 20, and the other end of a second handle 12 is embedded in the eighth blind hole 21.

[0041] Aiming at the difficulties of accurately controlling the angle of each winding layer, taking into account the difficulty of alternating winding of winding layers at different angles and accurately controlling the thickness of the blank during the preparation process, a Figure 1 The winding structure of the ultra-thin carbon-carbon screen blank shown in the figure. With the help of this structure, the angle of the winding layer can be changed and accurately controlled by switching different fixing screw holes and corresponding tightening holes during the winding process of the ultra-thin carbon-carbon screen blank, and the thickness of the blank can be accurately controlled by using triangular gaskets.

[0042] like Figure 1 , Figure 2 and Figure 8As shown, the winding structure for preparing the ultra-thin carbon-carbon screen mesh blank includes: a handle 1, a circular gasket 2, a nut 3, a lower pressure plate 4, a winding plate 5, a screw 6, an upper pressure plate 7 and a triangular gasket 33; wherein the handle 1 is embedded in the blind holes on the sides of the lower pressure plate 4 and the upper pressure plate 7, and is fixed by welding; the lower surface of the winding plate 5 is pressed against the upper surface of the lower pressure plate 4; the upper surface of the winding plate 5 is pressed against the lower surface of the upper pressure plate 7; the lower pressure plate 4, the winding plate 5 and the upper pressure plate 7 are fixed by means of a circular gasket 2, a nut 3 and a screw 6; the circular gasket 2, the nut 3 and the screw 6 can use standard parts.

[0043] like Figure 3 and Figure 4 As shown, the winding plate 5 is designed with 12 side edges in total, of which 6 longer side edges are provided with grooves 8; the grooves 8 are used to facilitate cutting of side edge fibers after the pre-gelation of the blank is completed.

[0044] like Figure 3 and Figure 4 As shown, the winding plate 5 is designed with a total of 12 side edges, of which three shorter side edges are provided with tightening holes 9, 10 and 11; the tightening holes 9, 10 and 11 are used to be fixed to the tightening devices of the winding equipment when preparing winding layers in different directions, and the size and shape of the tightening devices of the winding equipment used should be designed.

[0045] like Figure 3 and Figure 4 As shown, the winding plate 5 is designed with a total of 12 side edges, of which three shorter sides are provided with fixing screw holes 12, 13 and 14; the fixing screw holes 12, 13 and 14 are used to fix to the clamping shaft of the winding equipment when preparing winding layers in different directions, and the screw hole diameter and depth should be designed according to the clamping shaft of the winding equipment used.

[0046] like Figure 5 As shown, the front side of the upper pressing plate 7 is provided with through holes 15 , 18 , 19 and 22 ; the through holes 15 , 18 , 19 and 22 are used for the screws 6 to pass through.

[0047] like Figure 5 As shown, blind holes 16 , 17 , 20 and 21 are provided on the side of the upper pressing plate 7 ; the blind holes 16 , 17 , 20 and 21 are used to embed the handle 1 .

[0048] like Figure 6 As shown, the front side of the lower pressing plate 4 is provided with through holes 23 , 26 , 27 and 30 ; the through holes 23 , 26 , 27 and 30 are used for the screws 6 to pass through and be fixed with the round gasket 2 and the nut 3 .

[0049] like Figure 6As shown, blind holes 24, 25, 28 and 29 are provided on the side of the lower pressing plate 4; the blind holes 24, 25, 28 and 29 are used to embed the handle 1.

[0050] like Figure 7 As shown, chamfers 31 and 32 are provided at both end surfaces of the handle 1; the purpose of chamfers 31 and 32 is to facilitate the handle 1 to be embedded in the blind holes 16, 17, 20, 21, 24, 25, 28 and 29; the handle is used to facilitate the demoulding operation of the lower pressing plate 4 and the upper pressing plate 7 after the blank is solidified and formed; the directions in which the lower pressing plate 4 and the upper pressing plate 7 are embedded in the handle 1 are staggered, the purpose of which is to avoid affecting the cutting operation of the side fibers after the pre-gel is completed.

[0051] like Figure 8 As shown, it is designed with equal thickness; there are multiple triangular gaskets 33, and their thickness is equal to the designed thickness of the ultra-thin carbon-carbon screen blank to be prepared; the triangular gasket 33 is used to be placed in the area not covered by the fiber winding layer between the lower pressure plate 4, the winding plate 5 and the upper pressure plate 7 during the winding process; in order to avoid the triangular gasket 33 from slipping during the pre-gel and curing process of the composite material, it is recommended to grind the upper and lower surfaces of the triangular gasket 33 to increase the friction; the shape of the triangular gasket 33 should be designed according to the specific shape of the area not covered by the fiber winding layer.

[0052] The material performance parameters of the triangular gasket and the friction coefficient after surface grinding must meet the following constraints:

[0053]

[0054] Among them, E s Specific modulus for triangular gasket material selection n is the number of triangular gasket layers pressed between the upper and lower pressure plates, k is the safety factor (the safety factor is required to be no less than 2, the higher the safety factor, the more stable the triangular gasket clamping), h is the thickness of a single triangular gasket, g is the acceleration of gravity, v is the Poisson's ratio of the triangular gasket material, μ is the friction coefficient of the triangular gasket after grinding, L is the distance between the lower surface of the upper pressure plate 7 and the upper surface of the lower pressure plate 4 after the winding structure is assembled, E is the elastic modulus of the triangular gasket material, and ρ is the density of the triangular gasket material.

[0055] Effect: This formula allows the triangular gasket to be clamped and will not fall off during the use process from the completion of the winding structure assembly to the disassembly.

[0056] This embodiment realizes the preparation of winding layers in different directions and the precise control of winding angles by arranging tightening holes and fixing screw holes in different directions on the side of the winding plate, and realizes the precise control of the thickness of the blank by using triangular gaskets.

[0057] This embodiment completes the layered winding of composite materials in different winding directions and effectively improves the accuracy of the winding angle by switching different fixing screw holes and corresponding tightening holes and fixing with the winding equipment. It realizes precise control of the thickness of the blank by placing triangular gaskets between the upper pressing plate, the lower pressing plate and the winding plate. It solves the difficulties of accurately controlling the angles of each winding layer, balancing the alternating winding of winding layers at different angles and accurately controlling the thickness of the blank during the preparation of the ultra-thin carbon-carbon screen blank.

[0058] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A winding structure of an ultra-thin carbon-carbon screen blank, characterized in that include: A first handle (11), a second handle (12), a lower pressing plate (4), a wrapping plate (5) and an upper pressing plate (7); wherein, The lower pressing plate (4) is connected to the upper pressing plate (7); The wrapping plate (5) is arranged between the lower pressing plate (4) and the upper pressing plate (7), wherein the lower surface of the wrapping plate (5) is pressed against the upper surface of the lower pressing plate (4); and the upper surface of the wrapping plate (5) is pressed against the lower surface of the upper pressing plate (7); The first handle (11) is connected to the side wall of the lower pressing plate (4); The second handle (12) is connected to the side wall of the upper pressing plate (7).

2. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 1 is characterized in that Also includes: Nut (3) and screw (6); wherein, The screw (6) passes through the upper pressing plate (7) and the lower pressing plate (4) in sequence and is connected to the nut (3).

3. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 2 is characterized in that Also includes: Round gasket (2); wherein, The circular washer (2) is sleeved on the outer surface of the screw (6), and the circular washer (2) is located between the nut (3) and the lower pressing plate (4).

4. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 1 is characterized in that: The wrapping plate (5) comprises 6 long sides and 6 short sides, wherein each long side and each short side are alternately connected.

5. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 4 is characterized in that: The long side is provided with a groove (8); wherein the groove (8) is used to facilitate cutting of the side fibers after the pre-gelling of the blank is completed.

6. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 4 is characterized in that: Three adjacent short sides among the six short sides are respectively provided with a first tightening hole (9), a second tightening hole (10) and a third tightening hole (11); wherein the first tightening hole (9), the second tightening hole (10) and the third tightening hole (11) are used to be respectively fixed to the tightening device of the winding equipment when preparing winding layers in different directions; The remaining three short sides are respectively provided with a first fixing screw hole (12), a second fixing screw hole (13) and a third fixing screw hole (14); wherein the first fixing screw hole (12), the second fixing screw hole (13) and the third fixing screw hole (14) are used to fix to the clamping shaft of the winding equipment respectively when preparing winding layers in different directions.

7. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 2 is characterized in that: The number of the screws (6) is four, and the number of the nuts (3) is equal to the number of the screws (6).

8. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 7 is characterized in that: The upper pressing plate (7) is provided with a first through hole (15), a second through hole (18), a third through hole (19) and a fourth through hole (22); The lower pressing plate (4) is provided with a fifth through hole (23), a sixth through hole (26), a seventh through hole (27) and an eighth through hole (30); The first screw passes through the first through hole (15) and the fifth through hole (23) in sequence and is connected to the first nut; The second screw passes through the second through hole (18) and the sixth through hole (26) in sequence and is connected to the second nut; The third screw passes through the third through hole (19) and the seventh through hole (27) in sequence and is connected to the third nut; The fourth screw passes through the fourth through hole (22) and the eighth through hole (30) in sequence and is connected to the fourth nut.

9. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 1 is characterized in that: The number of the first handles (11) is two; A first blind hole (24) and a second blind hole (25) are formed on one side wall of the lower pressing plate (4), and a third blind hole (28) and a fourth blind hole (29) are formed on the other side wall of the lower pressing plate (4); One end of a first handle (11) is embedded in the first blind hole (24), and the other end of the first handle (11) is embedded in the second blind hole (25); One end of the other first handle (11) is embedded in the third blind hole (28), and the other end of the first handle (11) is embedded in the fourth blind hole (29).

10. The winding structure of the ultra-thin carbon-carbon screen blank according to claim 1, characterized in that: The number of the second handles (12) is two; A fifth blind hole (16) and a sixth blind hole (17) are formed on one side wall of the lower pressing plate (4), and a seventh blind hole (20) and an eighth blind hole (21) are formed on the other side wall of the lower pressing plate (4); One end of a second handle (12) is embedded in the fifth blind hole (16), and the other end of a second handle (12) is embedded in the sixth blind hole (17); One end of another second handle (12) is embedded in the seventh blind hole (20), and the other end of another second handle (12) is embedded in the eighth blind hole (21).

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