Integral compression molding method for large-size thin-wall multifunctional special-shaped thermal protection component

Abstract

The invention relates to the technical field of thermal protection components, in particular to an integral compression molding method for a large-size thin-wall special-shaped thermal protection component, which comprises the following steps: equally dividing the special-shaped thermal protection component along the thickness direction; the inner barrel is divided into an upper inner barrel and a lower inner barrel by a horizontal plane which is 1 / 3 of the height of the barrel from the top of the barrel, and the outer barrel is divided into an upper outer barrel and a lower outer barrel by a horizontal plane which is 2 / 3 of the height of the barrel from the top of the barrel; the upper inner cylinder, the lower inner cylinder, the upper outer cylinder and the lower outer cylinder are equally divided by vertical planes which simultaneously penetrate through the axis of the cylinder body and penetrate out of the space between every two adjacent base plates, and a plurality of thermal protection component split bodies are obtained; respectively calculating the weight of the premix required by each thermal protection component split body; the premix is laid in a pre-laying mold, preheating and pre-compaction are conducted, and a split prefabricated part of the thermal protection component is obtained; and placing each thermal protection component split prefabricated part in a thermal protection component mold, closing the mold, heating, pressurizing, curing, demolding and machining to obtain the special-shaped thermal protection component.

Description

Technical Field

[0001] The invention relates to the technical field of heat protection components, and in particular to an integral compression molding method for a large-size, thin-walled, multifunctional, special-shaped heat protection component. Background Art

[0002] For resin-based composite materials, compression molding is one of the traditional and mature processes. The products produced by compression molding have isotropic performance and good quality uniformity. However, the products produced by compression molding are limited by the mold structure and equipment conditions such as hydraulic presses. The product structure and surface are simple, and the product size is generally small.

[0003] The operating conditions of special-shaped thermal protection components are very harsh. When re-entering the atmosphere, the speed can reach 20 to 25 times the speed of sound, the stagnation temperature can be as high as 8000 to 10000℃, the cone surface temperature is 3000 to 3500℃, and the stagnation pressure can reach 10MPa. The harsh re-entry thermal environment directly affects the safety of special-shaped thermal protection components. Therefore, the stable performance of special-shaped thermal protection components is of vital importance. The function of special-shaped thermal protection components is not only to ensure their own structural integrity to prevent them from being burned in the re-entry environment, but also to ensure that the internal devices are within the designed temperature range to prevent the payload from being affected by excessive heat transfer.

[0004] The special-shaped heat protection components have a complex appearance and structure. The special-shaped heat protection components prepared by the existing molding method include barrel sections, fairings, rudder base plates, screws, nuts and other parts. The barrel section is prepared by a cloth tape winding process, and the fairings, rudder base plates, screws and nuts are prepared by a molding process. The rudder base plate and the barrel section are fastened by gluing and screws and nuts; the preparation of the barrel section includes the following steps: the ablation-resistant fabric is impregnated with ablation-resistant resin, dried, and pre-cured, cut into strips of cloth of required width, and formed into blanks by cloth tape winding on a special mold, coated with adhesive-absorbing materials and rubber sleeves, etc., and put into a hydraulic autoclave for pressurization, temperature rise and curing, and then mechanically processed to the required size after being taken out of the autoclave; the preparation of the fairing and the rudder base plate includes the following steps: the ablation-resistant fiber is cut into the required length (the fiber of the rudder base plate needs to be cut a little longer to increase the strength of the rudder base plate), mixed with the ablation-resistant resin in a certain amount of proportion, dried and pre-cured to form a premix, and a certain amount of premix is ​​loaded into the fairing, rudder base plate, In the special high-precision mold for screws and nuts, the temperature is increased and pressurized for curing, demoulding, and machining is performed to the dimensional accuracy required by the product; the overall preparation of special-shaped thermal protection components includes the following steps: first, the position of the rudder base plate and the position of the screw fixing are determined on the barrel section, the barrel section is machined and flattened according to the size of the rudder base plate, and holes for passing screws are punched on the barrel section and the rudder base plate, with six sets of screws and nuts for each rudder base plate; secondly, the barrel section is placed on a special tooling, and four rudder base plates are bonded one by one by screwing and bonding; finally, after the glue is cured, the tooling is removed and the residual glue is cleaned; this molding method not only has many processes, poor quality consistency, poor stability, high production cost, and long production cycle, but also can only meet the working conditions of relatively mild ablation environment. When re-entering the atmosphere, the heat generated by friction with the air increases sharply. Under the harsh working conditions, if this scheme is still adopted, not only will the adhesive fail at high temperature, but the screws and nuts will also be damaged by the erosion of higher temperature and higher speed heat flow.

[0005] Therefore, in view of the above problems, the present invention urgently needs to provide a method for integrally pressing a large-sized, thin-walled, multifunctional, special-shaped heat protection component. Summary of the invention

[0006] The technical problem solved by the present invention is to provide a method for integral compression molding of large-sized, thin-walled, multifunctional special-shaped heat protection components. By accurately zoning, preheating, and pre-compacting the special-shaped heat protection components, and then laying each prefabricated part in a mold for remolding, not only the problems of thin-walled structure and narrow loading cavity are solved, but also the thickness of the prepared special-shaped heat protection components is uniform, and the mechanical properties and ablation resistance are excellent, thus meeting the working conditions and use requirements of the special-shaped heat protection components.

[0007] The present invention provides a method for integrally pressing a large-sized, thin-walled, multifunctional, special-shaped heat protection component. The special-shaped heat protection component comprises a cylinder arranged in an inverted cone shape, a plurality of substrates are evenly spaced on the outer surface of the cylinder, and a bottom of each substrate is provided with an inverted trapezoidal curved boss. The molding method comprises the following steps: 1) Establish a special-shaped heat protection component model, and set machining allowances extending outward at the upper and lower ends of the special-shaped heat protection component model; divide the special-shaped heat protection component with machining allowances in half along the thickness direction of the cylinder to obtain an inner cylinder and an outer cylinder; divide the inner cylinder into an upper inner cylinder and a lower inner cylinder at a horizontal plane with a distance of 1 / 3 of the cylinder height from the top of the cylinder, and divide the outer cylinder into an upper outer cylinder and a lower outer cylinder at a horizontal plane with a distance of 2 / 3 of the cylinder height from the top of the cylinder; divide the upper inner cylinder, the lower inner cylinder, the upper outer cylinder and the lower outer cylinder into equal parts at a vertical plane that simultaneously passes through the axis of the cylinder and passes through between every two adjacent substrates; divide the heat protection component into a plurality of heat protection component splits, which include a plurality of upper inner cylinder splits, a plurality of lower inner cylinder splits, a plurality of upper outer cylinder splits, a plurality of lower outer cylinder splits, a plurality of substrates and a plurality of curved bosses; calculate the weight of the premix required for each heat protection component split; 2) Mixing resin, fiber and absorbing material to obtain a premix; accurately weighing the premix required for each thermal protection component segment, laying the premix in a pre-laying mold according to the shape of different thermal protection component segments, preheating and pre-compacting, and obtaining thermal protection component segment prefabricated parts; 3) placing each heat protection component separate prefabricated part in the heat protection component mold according to the shape of the special-shaped heat protection component, closing the mold, heating, pressurizing, curing, and demoulding to obtain the special-shaped heat protection component prefabricated part; 4) Mechanically process the prefabricated special-shaped heat protection component to remove the machining allowance and obtain the special-shaped heat protection component.

[0008] Preferably, the ratio of resin, fiber and absorbing material is 45-55:55-45:1.

[0009] Preferably, the fiber is one of carbon fiber, high silica fiber, glass fiber, and quartz fiber, and the resin is one of aminophenol aldehyde, magnesium phenol aldehyde, boron phenol aldehyde, and benzoxazine.

[0010] Preferably, in step 2), the pre-compression pressure F of each heat protection component is 预 Satisfies the following formula: F 预 =kF 成型 , where F 成型 is the molding pressure of the special-shaped heat protection component, k is the pre-compression coefficient of the heat protection component split, which is 5-15%; the preheating temperature of each heat protection component split is determined according to the dynamic curing curve of the resin in the premix, which is 60-100°C.

[0011] Preferably, in step 1), the machining allowance includes a first extension area extending from the large end of the cylinder along the generatrix direction and a circular second extension area connecting the small end of the cylinder.

[0012] Preferably, the length of the first extension zone is 100-200 mm, and the second extension zone is a ring with a thickness of 10-20 mm and a width of 50-150 mm.

[0013] Preferably, in step 2), after the lower outer cylinder body and the upper outer cylinder body are laid, when laying the upper inner cylinder body and the lower inner cylinder body, the upper inner cylinder body and the lower inner cylinder body are rotated by a certain angle along the axis of the cylinder body before laying.

[0014] Preferably, the inner diameter of the large end of the cylinder is 853.9 mm, and the inner diameter of the small end is 600 mm; the height of the cylinder is 500-1000 mm, and the semi-cone angle is 5-15°.

[0015] Preferably, the thickness of the substrate is 15 mm, and the distance between the highest point of the curved boss and the highest point of the substrate is 30 mm.

[0016] Preferably, the wall thickness of the cylinder is 10-12 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for integrally pressing a large-size thin-walled multifunctional special-shaped heat protection component. The heat protection component is divided into a plurality of parts, and then the weight of the required premix is ​​accurately calculated according to each part, and the premix is ​​preheated and pre-compacted in a pre-laying mold. Then the prefabricated part is laid in a molding mold, and the mold is closed, pressurized, and then solidified. The cylinder, the base plate, and the curved boss are integrally pressed at one time, which not only saves screws and nuts, but also does not require multiple processes and multiple procedures such as molding, machining, and reassembly of each component separately, and eliminates multiple hidden dangers such as high-temperature failure of adhesives and mechanical properties reduced by machining, thereby improving the overall performance and accurately striking the target. The present invention not only solves the problems of thin-walled structure and narrow charging cavity by accurately partitioning the premix and remolding, but also makes the prepared special-shaped heat protection component have uniform thickness, excellent mechanical properties and ablation resistance, and meets the working condition use requirements of the special-shaped heat protection component. In addition, the present invention divides the inner cylinder and the outer cylinder along horizontal planes of different heights, increases the bonding surface between different heat protection component splits, makes the heat protection component splits tightly bonded, and avoids the phenomenon of stratification during the use of the heat protection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2. It is a schematic structural diagram (front view) of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to an embodiment of the present invention; Figure 2 The present invention is an operation flow chart of a method for integral compression molding of large-sized, thin-walled, multifunctional, special-shaped heat protection components.

[0019] Among them: 1. cylinder; 2. base plate; 3. curved boss. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 , Figure 2 As shown, this embodiment provides a method for integrally molding a large-sized, thin-walled, multifunctional, special-shaped heat protection component. The special-shaped heat protection component includes a cylinder 1 arranged in an inverted cone shape, and a plurality of base plates 2 are evenly spaced on the outer surface of the cylinder 1. The bottom of each base plate 2 is provided with a curved boss 3 in an inverted trapezoidal shape. The molding method includes the following steps: 1) Establish a special-shaped heat protection component model, and set machining allowances extending outward at the upper and lower ends of the special-shaped heat protection component model; divide the special-shaped heat protection component with machining allowances in half along the thickness direction of the cylinder 1 to obtain an inner cylinder and an outer cylinder; divide the inner cylinder into an upper inner cylinder and a lower inner cylinder at a horizontal plane whose distance from the top of the cylinder 1 is 1 / 3 of the height of the cylinder 1, and divide the outer cylinder into an upper outer cylinder and a lower outer cylinder at a horizontal plane whose distance from the top of the cylinder 1 is 2 / 3 of the height of the cylinder 1; divide the upper inner cylinder, the lower inner cylinder, the upper outer cylinder and the lower outer cylinder into equal parts at a vertical plane which passes through the axis of the cylinder 1 and passes between every two adjacent substrates 2; divide the heat protection component into a plurality of heat protection component splits, which include a plurality of upper inner cylinder splits, a plurality of lower inner cylinder splits, a plurality of upper outer cylinder splits, a plurality of lower outer cylinder splits, a plurality of substrates 2 and a plurality of curved bosses 3; and calculate the weight of the premix required for each heat protection component split; 2) Mixing resin, fiber and absorbing material to obtain a premix; accurately weighing the premix required for each thermal protection component segment, laying the premix in a pre-laying mold according to the shape of different thermal protection component segments, preheating and pre-compacting, and obtaining thermal protection component segment prefabricated parts; 3) placing each heat protection component separate prefabricated part in the heat protection component mold according to the shape of the special-shaped heat protection component, closing the mold, heating, pressurizing, curing, and demoulding to obtain the special-shaped heat protection component prefabricated part; 4) Mechanically process the prefabricated special-shaped heat protection component to remove the machining allowance and obtain the special-shaped heat protection component.

[0022] The present invention provides a method for integrally pressing a large-sized, thin-walled, multifunctional, and special-shaped heat protection component. The heat protection component is divided into a plurality of parts, and the weight of the required premix is ​​accurately calculated according to each part. The premix is ​​preheated and pre-compacted in a pre-laying mold, and then the preform is laid in a forming mold. The mold is closed, pressurized, and then solidified. The barrel 1, the base plate 2, and the curved boss 3 are integrally pressed at one time, which not only saves screws and nuts, but also eliminates the need for multiple processes and procedures such as molding, machining, and reassembly of each component separately, and eliminates the high-temperature failure of the adhesive and the reduction of machining. The invention can eliminate various hidden dangers such as mechanical properties, improve the overall performance, and accurately hit the target; the invention can solve the problems of thin-wall structure and narrow charging cavity by accurately partitioning the premix and remolding, and make the prepared special-shaped heat protection components have uniform thickness, excellent mechanical properties and ablation resistance, and meet the working conditions of special-shaped heat protection components; and the invention divides the inner cylinder and the outer cylinder along horizontal planes at different heights, increases the bonding surface between different heat protection component splits, makes the heat protection component splits tightly combined, and avoids the phenomenon of stratification during the use of the heat protection components.

[0023] In this embodiment, the ratio of resin, fiber and absorbing material is 45-55:55-45:1.

[0024] In this embodiment, the fiber is one of carbon fiber, high silica fiber, glass fiber, and quartz fiber, and the resin is one of aminophenol aldehyde, magnesium phenol aldehyde, boron phenol aldehyde, and benzoxazine.

[0025] In this embodiment, in step 2), the pre-compression pressure F of each heat protection component is 预 Satisfies the following formula: F 预 =kF 成型 , where F 成型 is the molding pressure of the special-shaped heat protection component, k is the pre-compression coefficient of the heat protection component split, which is 5-15%; the preheating temperature of each heat protection component split is determined according to the dynamic curing curve of the resin in the premix, which is 60-100°C.

[0026] In this embodiment, in step 1), the machining allowance includes a first extension area extending from the large end of the cylinder 1 along the generatrix direction and a circular second extension area connected to the small end of the cylinder.

[0027] In this embodiment, the length of the first extension zone is 100-200 mm, and the second extension zone is a circular ring with a thickness of 10-20 mm and a width of 50-150 mm.

[0028] In this embodiment, in step 2), after the lower outer cylinder split body and the upper outer cylinder split body are laid, when laying the upper inner cylinder split body and the lower inner cylinder split body, the upper inner cylinder split body and the lower inner cylinder split body are rotated a certain angle along the axis of the cylinder body 1 and then laid.

[0029] In this embodiment, the inner diameter of the large end of the cylinder 1 is 853.9 mm, and the inner diameter of the small end is 600 mm; the height of the cylinder 1 is 500-1000 mm, and the semi-cone angle is 5-15°.

[0030] In this embodiment, the thickness of the substrate 2 is 15 mm, and the distance between the highest point of the curved boss 3 and the highest point of the substrate 2 is 30 mm.

[0031] In this embodiment, the wall thickness of the cylinder 1 is 10-12 mm.

[0032] The present invention also provides an embodiment, wherein the inner diameter of the small end of the cylinder 1 of the large-size thin-walled multifunctional special-shaped heat protection component is 600 mm, the inner diameter of the large end is 853.9 mm, the height of the cylinder 1 is 720 mm, the semi-cone angle is 10°, the wall thickness of the small end is 12 mm, and the wall thickness of the large end is 10 mm; the width of the base plate 2 is 180 mm, and the thickness is 15 mm; the distance between the highest point of the curved boss 3 and the highest point of the base plate 2 is 30 mm; The molding method comprises the following steps: 1) Establish a special-shaped heat protection component model, and set machining allowances extending outward at the upper and lower ends of the special-shaped heat protection component model; divide the special-shaped heat protection component with machining allowances in half along the thickness direction of the cylinder 1 to obtain an inner cylinder and an outer cylinder; divide the inner cylinder into an upper inner cylinder and a lower inner cylinder at a horizontal plane whose distance from the top of the cylinder 1 is 1 / 3 of the height of the cylinder 1, and divide the outer cylinder into an upper outer cylinder and a lower outer cylinder at a horizontal plane whose distance from the top of the cylinder 1 is 2 / 3 of the height of the cylinder 1; divide the upper inner cylinder, the lower inner cylinder, the upper outer cylinder and the lower outer cylinder into equal parts at a vertical plane which passes through the axis of the cylinder 1 and passes between every two adjacent substrates 2; divide the heat protection component into a plurality of heat protection component splits, which include a plurality of upper inner cylinder splits, a plurality of lower inner cylinder splits, a plurality of upper outer cylinder splits, a plurality of lower outer cylinder splits, a plurality of substrates 2 and a plurality of curved bosses 3; and calculate the weight of the premix required for each heat protection component split; After calculation, the weight of premix required for each of the 4 upper inner cylinders is 1479g, the weight required for each of the 4 lower inner cylinders is 3295g, the weight of premix required for each of the 4 upper outer cylinders is 2882g, and the weight of premix required for each of the 4 lower outer cylinders is 1778g; 2) Mixing resin, fiber and absorbing material to obtain a premix; accurately weighing the premix required for each thermal protection component segment, laying the premix in a pre-laying mold according to the shape of different thermal protection component segments, preheating and pre-compacting, and obtaining thermal protection component segment prefabricated parts; The fiber is made of high-silica fiber, and the resin is made of magnesium phenolic resin system with absorbing and stealth materials; the preheating temperature is 80℃, and the preforming pressure is F 预 =kF 成型 , k is selected as 10%, then F预 =10%*F 成型 ; Among them, for the lower outer cylinder, the premix required for the curved boss 3 parts is accurately weighed, and the premix is ​​filled into the curved boss 3 parts of the pre-laying mold, and after pre-compacting, the premix of the rest of the lower outer cylinder is laid, preheated, and pre-compacted to obtain the lower outer cylinder preform; It is calculated that in the lower outer cylinder, the weight of the premix required for each curved boss 3 is 180g, and the weight of the premix required for each substrate 2 is 1947g; the laying order of each lower outer cylinder is: the first step is to lay each curved boss 3, the second step is to lay each substrate 2, the third step is to lay each lower outer cylinder segment, the fourth step is to lay each upper outer cylinder segment, the fifth step is to lay each lower inner cylinder segment, and the sixth step is to lay each upper inner cylinder segment; when laying each upper inner cylinder segment and each lower inner cylinder segment, each upper inner cylinder segment and each lower inner cylinder segment are rotated along the axis of the cylinder 1 by a certain angle before laying, which can generally be rotated clockwise by 10° to 20°; 3) placing each heat protection component separate prefabricated part in the heat protection component mold according to the shape of the special-shaped heat protection component, closing the mold, heating it to 100-110°C, increasing the molding pressure to 20-30MPa, and then heating it to 165-180°C at a rate of 2-5°C / 10min, keeping the temperature for 3h, and demoulding after naturally cooling it to below 60°C to obtain the special-shaped heat protection component prefabricated part; 4) Mechanically process the prefabricated special-shaped heat protection component to remove the machining allowance and obtain the special-shaped heat protection component.

[0033] After testing, the performance of the special-shaped heat protection component prepared by the present invention is shown in Table 1: Table 1: Performance table of special-shaped thermal protection components

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for integrally molding a large-sized, thin-walled, multifunctional, special-shaped heat protection component, the special-shaped heat protection component comprising a cylinder (1) arranged in an inverted cone shape, a plurality of base plates (2) being evenly spaced on the outer surface of the cylinder (1), and a bottom of each base plate (2) being provided with an inverted trapezoidal curved boss (3), characterized in that: The molding method comprises the following steps: 1) establishing a model of a special-shaped heat protection component, and extending machining allowances outwards at the upper and lower ends of the special-shaped heat protection component model; dividing the special-shaped heat protection component with the machining allowances in half along the thickness direction of the cylinder (1) to obtain an inner cylinder and an outer cylinder; dividing the inner cylinder into an upper inner cylinder and a lower inner cylinder by a horizontal plane whose distance from the top of the cylinder (1) is 1 / 3 of the height of the cylinder (1); dividing the outer cylinder into an upper outer cylinder and a lower outer cylinder by a horizontal plane whose distance from the top of the cylinder (1) is 2 / 3 of the height of the cylinder (1); dividing the upper inner cylinder, the lower inner cylinder, the upper outer cylinder and the lower outer cylinder into equal parts by a vertical plane which simultaneously passes through the axis of the cylinder (1) and passes through between every two adjacent base plates (2); Dividing the heat protection component into a plurality of heat protection component parts, the heat protection component parts comprising a plurality of upper inner cylinder parts, a plurality of lower inner cylinder parts, a plurality of upper outer cylinder parts, a plurality of lower outer cylinder parts, a plurality of base plates (2) and a plurality of curved bosses (3); Calculate the weight of the premix required for each heat protection component separately; 2) Mixing resin, fiber and absorbing material to obtain a premix; accurately weighing the premix required for each thermal protection component segment, laying the premix in a pre-laying mold according to the shape of different thermal protection component segments, preheating and pre-compacting, and obtaining thermal protection component segment prefabricated parts; 3) placing each heat protection component separate prefabricated part in the heat protection component mold according to the shape of the special-shaped heat protection component, closing the mold, heating, pressurizing, curing, and demoulding to obtain the special-shaped heat protection component prefabricated part; 4) Mechanically process the prefabricated special-shaped heat protection component to remove the machining allowance and obtain the special-shaped heat protection component.

2. The integral compression molding method of a large-size, thin-walled, multifunctional, special-shaped heat protection component according to claim 1, characterized in that: The ratio of resin, fiber and absorbing material is 45-55:55-45:

1.

3. The integral compression molding method of a large-size, thin-walled, multifunctional, special-shaped heat protection component according to claim 2, characterized in that: The fiber is one of carbon fiber, high silica fiber, glass fiber and quartz fiber, and the resin is one of aminophenol aldehyde, magnesium phenol aldehyde, boron phenol aldehyde and benzoxazine.

4. The integral compression molding method of a large-size, thin-walled, multifunctional, special-shaped heat protection component according to claim 3 is characterized in that: In step 2), the preload pressure F of each heat protection component is 预 Satisfies the following formula: F 预 =kF 成型 , where F 成型 is the molding pressure of the special-shaped heat protection component, k is the pre-compression coefficient of the heat protection component split, which is 5-15%; the preheating temperature of each heat protection component split is determined according to the dynamic curing curve of the resin in the premix, which is 60-100°C.

5. The integral compression molding method of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to claim 4, characterized in that: In step 1), the machining allowance includes a first extension area extending from the large end of the cylinder (1) along the generatrix direction and a circular second extension area connected to the small end of the cylinder.

6. The integral compression molding method of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to claim 5, characterized in that: The length of the first extension zone is 100-200 mm, and the second extension zone is a circular ring with a thickness of 10-20 mm and a width of 50-150 mm.

7. The integral compression molding method of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to claim 6, characterized in that: In step 2), after the lower outer cylinder segment and the upper outer cylinder segment are laid, when laying the upper inner cylinder segment and the lower inner cylinder segment, the upper inner cylinder segment and the lower inner cylinder segment are rotated along the axis of the cylinder (1) by a certain angle before laying.

8. The integral compression molding method of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to claim 7, characterized in that: The inner diameter of the large end of the cylinder (1) is 853.9 mm, and the inner diameter of the small end is 600 mm; the height of the cylinder (1) is 500-1000 mm, and the semi-cone angle is 5-15°.

9. The integral compression molding method of a large-sized, thin-walled, multifunctional, special-shaped heat protection component according to claim 8, characterized in that: The thickness of the substrate (2) is 15 mm, and the distance between the highest point of the curved boss (3) and the highest point of the substrate (2) is 30 mm.

10. The integral compression molding method of a large-size, thin-walled, multifunctional, special-shaped heat protection component according to claim 9, characterized in that: The wall thickness of the cylinder (1) is 10-12 mm.

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