High-temperature-resistant nano-microporous heat-insulating plate and production method thereof

Abstract

The application relates to a high-temperature-resistant nano microporous heat insulation plate and a production method thereof, and comprises the following steps: step one, material preparation, 15-20% of fumed silica, 40-50% of fumed alumina, 10-15% of nano titanium oxide, 10-15% of superfine silicon carbide, 4-5% of alumina fiber and 4-5% of high-temperature stabilizer are mixed to form main raw materials; step two, filler, an appropriate amount of the main raw materials is filled with a pore-forming agent, the main raw materials and the pore-forming agent are synchronously filled into a mold assembly in a vertical direction, wherein the pore-forming agent in each horizontal layer is uniformly embedded in the main raw materials in a dot-shaped mode, and the pore-forming agent in the vertical direction is arranged in the main raw materials in a staggered mode; the forming mechanism and the laying mechanism are arranged, the function that the filling material in the edge position of the forming space is filled sufficiently is realized, the main raw materials and the pore-forming agent are input in a mutual interval staggered mode through the material laying assembly, and the problems that the internal gap of the heat insulation plate is not uniform, the edge forming is insufficient, and the output is easy to wear are solved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature resistant nanoporous insulation board technology, and in particular to a high-temperature resistant nanoporous insulation board and its production method. Background Technology

[0002] High-temperature resistant nanoporous insulation board is a high-performance thermal insulation material based on nanotechnology and microporous structure design. It has ultra-low thermal conductivity and excellent high-temperature stability, and is widely used in thermal management under extreme temperature environments. In the production of high-temperature resistant nanoporous insulation board, the addition of pore-forming agent is to actively regulate the pore structure inside the material, thereby optimizing thermal insulation performance, mechanical strength and lightweight characteristics.

[0003] Chinese patent CN111285662A discloses a method for preparing a high-insulation nanoporous thermal insulation board, comprising the following steps: Proportioning: Fumed silica, fumed alumina, light-blocking agent and fiber are proportioned in a ratio of 50-90:0-20:5-35:0-10. During proportioning, the raw materials are proportioned in a closed environment using a raw material proportioning mechanism. Stirring: The raw materials proportioned in step S1 are pumped from the raw material proportioning mechanism into a stirring device through a pipeline. The stirring device is positioned away from the raw material proportioning mechanism. Dividing: The raw materials stirred in step S2 are divided into several equal portions. The amount of each portion of raw material corresponds to the mass required to form the nanoporous thermal insulation board. Forming: Each portion of raw material in step S3 is fed into a mold in a press. Each portion of raw material is pressed into a nanoporous thermal insulation board in the mold at a pressure of 0.15-0.4 MPa.

[0004] Currently, in the actual preparation process using existing technology, the pore-forming agent is simply added directly to the raw material to achieve the effect of forming pores inside the insulation board. However, it is difficult to accurately control the pore-forming agent and the raw material after simple mixing, which can lead to the pore size and the spacing between pores being too large or too small, resulting in an unstable pore structure and affecting the final insulation performance of the product. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a special molding process. During the filling process, the main raw materials and pore-forming agents are fed in a staggered manner, so that after pressing and molding, the pores inside the microporous insulation board are evenly distributed and the distance between two adjacent pores in the vertical or horizontal direction is moderate. This solves the problems of unstable pore structure and low insulation performance of existing microporous insulation boards.

[0006] To address the above technical issues, the following technical solution is adopted:

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for producing a high-temperature resistant nanoporous insulation board, comprising the following steps:

[0008] Step 1: Material preparation process. First, mix 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer to form the main raw materials.

[0009] Step 2, filling process: Take an appropriate amount of main raw material and pore-forming agent for filling. The main raw material and pore-forming agent are filled into the mold assembly in the vertical direction at the same time. Each horizontal layer of pore-forming agent is evenly embedded in the main raw material in the form of dots, and the pore-forming agent in the vertical direction is staggered in the main raw material.

[0010] Step 3, leveling process, until all filler material is filled, the main raw material located at the edge of the mold assembly automatically gathers towards the center through the closing action of the mold assembly;

[0011] Step 4: Stamping process. After the flattening is completed, the filler is pressed under high pressure to form a block sheet.

[0012] Preferably, the process also includes an output step, in which the formed sheet material in step four is lifted upward and the front and rear ends of the mold assembly are opened. The sheet material is then pushed horizontally to output while the inner wall of the mold assembly is cleaned. The positions of the two sets of mold assemblies are then swapped to begin pressing the next set of sheet material.

[0013] Preferably, the molding pressure in step four is between 25 and 95 MPa.

[0014] Preferably, the high-temperature sintering temperature of the extruded sheet is between 250°C and 450°C.

[0015] This application also provides a high-temperature resistant nanoporous insulation board prepared by the above-mentioned high-temperature resistant nanoporous insulation board production method, which includes the following main raw materials in parts by weight: 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer.

[0016] Preferably, the material includes a main body layer and a heat insulation layer. The main body layer is formed from a main raw material, and the heat insulation layer is formed from a pore-forming agent. The heat insulation layer is embedded inside the main body layer and is arranged in several groups at equal intervals along the thickness direction of the main body layer. Adjacent groups of heat insulation layers are staggered along the thickness direction.

[0017] Preferably, the long-term operating temperature range is -250℃ to 1100℃.

[0018] Preferably, the short-term temperature resistance peak range is 1200-1300℃.

[0019] As an even better option, its thermal conductivity is 0.025-0.035 W / (m·K) at a high temperature of 800℃.

[0020] The beneficial effects of this invention are as follows:

[0021] (1) The present invention uses a special filling method after mixing the main raw material and the pore-forming agent, so that the pore-forming agent in each horizontal layer is uniformly embedded in the main raw material in the form of dots, and the pore-forming agent in the vertical direction is staggered in the main raw material. This ensures that the number of holes in each layer is certain, and the spacing between two adjacent holes in the vertical direction is moderate. This avoids damage between holes due to the small spacing between the upper and lower holes under high pressure, thereby ensuring the production quality of the insulation board, reducing the thermal conductivity of the product at high temperature, and improving the product quality.

[0022] (2) The present invention adopts a mold assembly structure design. By slightly rotating the second shaping plate at a fixed angle in the front and rear positions, the filling material is filled more fully at the front and rear edges during the filling process. Then, without changing the structural state of the filling material, the filling material at the front and rear edges is squeezed against each other by rotating to a vertical state, which achieves the purpose of pre-shaping. Finally, during the extrusion molding, the molding strength of the front and rear ends is improved, thereby coping with the influence of pressure and friction during the push output, and ensuring the integrity and stability of the insulation board structure when it is output.

[0023] In summary, the high-temperature resistant nanoporous insulation board prepared by this invention has the advantages of stable and high insulation performance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the product structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the present invention;

[0027] Figure 4 This is a schematic diagram of the mold assembly structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the second shaping plate of the present invention being reset to a vertical state;

[0029] Figure 6 This is a schematic diagram of the material laying component structure of the present invention;

[0030] Figure 7This is a schematic diagram of the striking component structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the state of the limiting component of the present invention;

[0032] Figure 9 This is a schematic diagram of the control component structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the mold assembly structure when the insulation board of the present invention is output;

[0034] Figure 11 This is a schematic diagram of the production process of the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Example 1

[0038] like Figures 1 to 4 and Figure 11 As shown, this embodiment provides a method for producing a high-temperature resistant nanoporous insulation board, including the following steps:

[0039] Step 1: Material preparation. First, mix 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer to form main raw material 300.

[0040] Step 2: Filling. Take an appropriate amount of main raw material 300 and pore-forming agent 400 for filling. The main raw material 300 and pore-forming agent 400 are filled into the mold assembly 11 in the vertical direction at the same time. Each horizontal layer of pore-forming agent 400 is evenly embedded in the main raw material 300 in the form of dots, and the pore-forming agent 400 in the vertical direction is staggered in the main raw material 300.

[0041] Step 3, leveling process, until all filler material is filled, the main raw material located at the edge of the mold assembly automatically gathers towards the center through the closing action of the mold assembly;

[0042] Step 4: Stamping process. After the flattening is completed, the filler is pressed under high pressure to form a block sheet.

[0043] Furthermore, it also includes an output process, in which the formed sheet material in step four is lifted upward and the front and rear ends of the mold assembly 11 are opened. While the sheet material is pushed horizontally to output, the inner wall of the mold assembly 11 is cleaned. The positions of the two sets of mold assemblies 11 are swapped to start pressing the next set of sheet material.

[0044] Furthermore, the molding pressure in step four is between 25 and 95 MPa.

[0045] Furthermore, the high-temperature sintering temperature of the extruded sheet is between 250°C and 450°C.

[0046] Example 2

[0047] As a preferred option, in step one, material preparation, 15% fumed silica, 50% fumed alumina, 15% nano titanium dioxide, 10% ultrafine silicon carbide, 5% alumina fiber, and 5% high-temperature stabilizer are mixed to form main raw material 300.

[0048] Zirconia is used as the high-temperature stabilizer.

[0049] Furthermore, in step four, the molding pressure is between 95 MPa and the holding time is 120 seconds.

[0050] Furthermore, the high-temperature sintering temperature of the extruded sheet is 450°C.

[0051] The remaining steps are the same as in Example 1.

[0052] Example 3

[0053] As a preferred option, in step one, material preparation, 20% fumed silica, 40% fumed alumina, 15% nano titanium dioxide, 15% ultrafine silicon carbide, 5% alumina fiber, and 5% high-temperature stabilizer are mixed to form main raw material 300.

[0054] Furthermore, the molding pressure in step four is between 20 MPa.

[0055] Furthermore, the high-temperature sintering temperature of the extruded sheet is 400℃.

[0056] The remaining steps are the same as in Example 2.

[0057] Example 4

[0058] As a preferred option, in step one, material preparation, 15% fumed silica, 50% fumed alumina, 10% nano titanium dioxide, 15% ultrafine silicon carbide, 5% alumina fiber, and 5% high-temperature stabilizer are mixed to form main raw material 300.

[0059] The remaining steps are the same as in Example 2.

[0060] Furthermore, the molding pressure in step four is between 50 MPa.

[0061] Furthermore, the high-temperature sintering temperature of the extruded sheet is 250°C.

[0062] Example 5

[0063] like Figures 1 to 4 and Figure 11 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 5 and Embodiment 1 is as follows:

[0064] A high-temperature resistant nanoporous insulation board is prepared using the high-temperature resistant nanoporous insulation board production method described in Example 1, comprising the following main raw materials in parts by weight 300: 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer.

[0065] Furthermore, it includes a main body layer and a heat insulation layer. The main body layer is formed from the main raw material 300, and the heat insulation layer is formed from the pore-forming agent 400. The heat insulation layer is embedded inside the main body layer and is arranged in several groups at equal intervals along the thickness direction of the main body layer. Adjacent groups of heat insulation layers are staggered along the thickness direction.

[0066] It should be noted that the porogen in microporous insulation panels is a key additive used to form a micron-scale pore structure within the material. Its function is to generate gases or volatiles through physical or chemical decomposition, thereby forming a uniformly distributed pore network. Common porogen materials include the following categories: inorganic salts such as carbonates, and organic polymer materials such as polystyrene (PS) microspheres, which will not be listed individually here.

[0067] Furthermore, the long-term operating temperature range is -250℃ to 1100℃.

[0068] Furthermore, the short-term temperature resistance peak range is 1200-1300℃.

[0069] Furthermore, at a high temperature of 800℃, its thermal conductivity is 0.025-0.035 W / (m·K).

[0070] Example 6

[0071] like Figures 1 to 3 and Figures 6 to 9 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 6 and Embodiment 1 is as follows:

[0072] like Figures 1 to 3 and Figures 6 to 9 As shown, this embodiment provides a high-temperature resistant nanoporous insulation board production equipment, which uses the production process of Embodiment 1 to form the high-temperature resistant nanoporous insulation board of Embodiment 2, comprising:

[0073] Forming mechanism 1, which is mounted on the housing 200 and is used for extrusion forming and output of the insulation board 100;

[0074] The laying mechanism 2 is installed inside the housing 200 and is used to lay the main raw material 300 and the pore-forming agent 400 in the molding mechanism 1 in a regular manner;

[0075] The laying mechanism 2 includes two sets of laying components 21 installed inside the housing 200 for reciprocating movement to lay the main raw material 300 and the pore-forming agent 400; a striking component 22 installed on the laying components 21 for vibrating the laying components 21 to prevent clogging; a limiting component 23 installed on the laying components 21 for limiting the falling range of the main raw material 300 and the pore-forming agent 400; and a control component 24 installed on the housing 200 for adjusting the input direction of the main raw material 300 and the pore-forming agent 400 between the two sets of laying components 21.

[0076] In this embodiment, by setting the molding mechanism 1 and the laying mechanism 2, the function of fully filling the edge position of the molding space is realized. Furthermore, by using the laying component 21, the main raw material 300 and the pore-forming agent 400 are input in a staggered manner, which solves the problem of uneven internal gaps and insufficient edge molding of the insulation board 100, which easily causes wear when pushed out.

[0077] Furthermore, such as Figures 1 to 5 and Figure 10 As shown, the forming mechanism 1 includes a mold assembly 11 disposed on the housing 200 for receiving the main raw material 300 and the pore-forming agent 400, a stamping assembly 12 disposed on the housing 200 for stamping the insulation board 100, and an output assembly 13 disposed on the housing 200 for outputting the insulation board 100.

[0078] The mold assembly 11 includes a track 111 connected to the chassis 200, two sets of support plates 112 connected to the track 111, two sets of first shaping plates 113 connected to the support plates 112, two sets of mounting seats 114 connected to the support plates 112, mounting rods 115 connected to the mounting seats 114, telescopic members 116 connected to the support plates 112 and connected to the two sets of mounting seats 114, a second shaping plate 118 connected to the mounting rods 115 via torsion spring members 117, and two sets of guide plates 119 disposed on both sides of the track 111 for pressing the mounting seats 114;

[0079] The stamping assembly 12 includes a hydraulic device 122 connected to the housing 200 and with a pressure plate 121 connected to its output end, and two sets of positioning plates 123 connected to the pressure plate 121 and used to constrain the position of the second forming plate 118.

[0080] In this embodiment, by setting the mold assembly 11 and slightly rotating the second shaping plate 118 at a fixed angle in the front and rear positions, the filling material at the front and rear edges is filled more fully during the filling process. Then, without changing the structural state of the filling material, the filling material at the front and rear edges is squeezed against each other by rotating to a vertical state, which achieves the purpose of pre-shaping. Finally, during the extrusion molding, the molding strength at both ends is improved, thereby coping with the influence of pressure and friction during the push output, and ensuring that the insulation board 100 is structurally intact and stable when it is output.

[0081] In detail, the mold assembly 11, after being positioned in the middle, first undergoes extrusion molding under the downward movement of the hydraulic device 122 and the pressure plate 121. Simultaneously, another set of mold assemblies 11, in conjunction with the laying mechanism 2, fills the material. During the extrusion molding process, the two sets of positioning plates 123 on the pressure plate 121 first align with and abut against the inclined end of the corresponding second shaping plate 118. Then, the end of the pressure plate 121 continues to move downward to extrude the filler material and form the insulation board 100. After the molding process is completed, the pressure plate 121 begins to reset, and the positioning plates 123 reset under their own weight. After the insulation board 100 is output, the mold assembly 11 in the middle position falls back to its original position and, driven by the control component 24, resets. The two sets of mold components 11 exchange positions. During the process, the mold component 11 at the edge position moves to the mold component 11 at the edge position. Due to the limitation of the guide plate 119, the two sets of mounting seats 114 drive the second shaping plate 118 to move closer to the middle position. Due to the obstruction at the edge position of the receiving plate 112, the second shaping plate 118 rotates slightly. Similarly, when the mold component 11 at the edge position moves to the middle position, the mounting seats 114 gradually detach along the inclined surface of the guide plate 119. The mounting seats 114 on both sides reset to the sides under the action of the telescopic member 116. At the same time, the second shaping plate 118 is slowly rotated against the edge of the receiving plate 112 through the action of the torsion spring member 117 and reaches a vertical state, squeezing and constraining the filling material in the front and rear parts within the molding space.

[0082] It should be noted that the filler includes the main raw material 300 and the pore-forming agent 400. When the second shaping plate 118 rotates from the inclined position back to the vertical position, the contact point between the edge of the second shaping plate 118 and the receiving plate 112 decreases relative to the height of the second shaping plate 118. In this process, an upward frictional force is applied to the filler at the corner, which effectively prevents the filler from getting stuck in the gap.

[0083] Furthermore, such as Figures 1 to 3 and Figures 9 to 10 As shown, the output assembly 13 includes two sets of movable plates 131 connected to the chassis 200, a dust collection box 132 connected between the two sets of movable plates 131, a one-way screw 133 connected to the chassis 200 and threaded through the movable plates 131, two sets of first racks 134 connected to the pressure plate 121, a first gear 135 connected to the one-way screw 133 and meshing with the first racks 134, a second gear 136 connected to the mounting rod 115, a second rack 137 connected to the chassis 200 and meshing with the second gear 136, and a first drive cylinder 138 connected to the chassis 200 for lifting the output insulation plate 100 of the receiving plate 112.

[0084] In this embodiment, by setting the second gear 136 and the second rack 137 in the output component 13, the second shaping plates 118 at both ends of the mold component 11 automatically open when the mold component 11 is lifted upward. In conjunction with the meshing transmission of the first rack 134 and the first gear 135, the dust collection box 132 is driven to move laterally and push the heat insulation plate 100 when the pressure plate 121 is reset upward, thereby achieving rapid material discharge and improving work efficiency. At the same time, the residual powder on the first shaping plate 113, the second shaping plate 118 and the receiving plate 112 is collected under negative pressure to ensure processing accuracy.

[0085] In detail, after extrusion molding, the pressure plate 121 is reset, and at the same time, the first drive cylinder 138 lifts the middle mold assembly 11 upward through the output end. When it is lifted to the output height, due to the meshing transmission between the second gear 136 and the second rack 137, the mounting rod 115 drives the second shaping plate 118 to rotate through the torsion spring 117 until the second shaping plate 118 is embedded in the internal space of the mounting base 114. As the pressure plate 121 is reset upward, it drives the first rack 134 to move upward, and the first gear 135 meshes with it and rotates, thereby driving the one-way screw 133 to rotate. Then, the one-way screw 133 drives the moving plate 131 and the dust collection box 132 to move and push the insulation plate 100 outward for output. The dust collection box 132 scrapes away and collects the residual powder on the receiving plate 112, the first shaping plate 113 and the inner wall of the first shaping plate 113 under negative pressure.

[0086] It should be noted that the mounting base 114 can only move inward and not outward. At the same time, under the action of the torsion spring 117, the second shaping plate 118 is in contact with the edge of the receiving plate 112 under the action of elasticity before it is fully opened. The front end of the dust collection box 132 is provided with a protrusion to keep a certain distance from the heat insulation plate 100 when it is pushed, so as to carry out cleaning work. The dust collection box 132 is connected to a negative pressure device, which uses its own contact and movement of the first shaping plate 113 and the receiving plate 112 to scrape off dust and collect it under negative pressure, and to collect dust under negative pressure at the position where the second shaping plate 118 is pressed against the receiving plate 112.

[0087] Furthermore, such as Figures 1 to 3 and Figures 6 to 8 As shown, the material spreading assembly 21 includes a support frame 211 connected to the housing 200, two sets of sliders 212 connected to the support frame 211, a first material feeding box 213 and a second material feeding box 214 connected between the two sets of sliders 212, two sets of reciprocating screws 215 connected to the support frame 211 and threaded through the sliders 212, a motor 216 connected to the housing 200 and whose output end is connected to one side of the reciprocating screw 215, two sets of protrusions 217 connected to the support frame 211 for driving the first material feeding box 213 and the second material feeding box 214 to change position, and a belt drive component 218 connected to the two sets of reciprocating screws 215.

[0088] In this embodiment, by setting up the material laying component 21, the main raw material 300 and the pore-forming agent 400, which are alternately positioned at the outlet, are laid in multiple layers in a reciprocating manner. During the reciprocating process, the positions of the main raw material 300 and the pore-forming agent 400 are constantly exchanged. Thus, in the entire laying process, in conjunction with the impact of falling, the main raw material 300 and the pore-forming agent 400 form a uniform penetration between each other. The pore-forming agent 400 also exhibits a zigzag distribution in terms of position. This allows for more reasonable control of the size and spacing of the pores inside the insulation board 100, ensuring the insulation performance.

[0089] In detail, the motor 216 causes two sets of reciprocating lead screws 215 to rotate through the output end and the belt drive 218, which in turn causes two sets of sliders 212 connected to the support frame 211 to drive the first material box 213 and the second material box 214 to move back and forth to lay the main raw material 300 and the pore-forming agent 400. Under the action of the protrusions 217 at both ends, the first material box 213 and the second material box 214 will be laterally offset with each reciprocation, so that the main raw material 300 and the pore-forming agent 400 are distributed in a zigzag pattern in the vertical direction.

[0090] It should be noted that the outlets of the first feed box 213 and the second feed box 214 are alternately arranged in multiple sets to improve the fusion between the main raw material 300 and the pore-forming agent 400. At the same time, the combined outlet length of the first feed box 213 and the second feed box 214 is one unit longer than the length of the extrusion space, which is used to cooperate with the limiting component 23 to ensure that the width of each laying is consistent. The outlets of the first feed box 213 and the second feed box 214 are located at the two side edges, respectively.

[0091] Furthermore, such as Figures 6 to 7 As shown, the striking assembly 22 includes two sets of third racks 221 connected to the support frame 211, a third gear 223 connected to the slider 212 via a rotating shaft 222 and meshing with the third racks 221, and two sets of striking balls 224 respectively connected to the rotating shaft 222 and used to strike the first feed box 213 and the second feed box 214 to drive them to vibrate and feed materials.

[0092] In this embodiment, the striking component 22 is provided to prevent powder from getting stuck at the outlet and accumulating during reciprocating laying.

[0093] In detail, when the slider 212 moves, the third rack 221 and the third gear 223 are driven to mesh and transmit power through the rotating shaft 222, which in turn causes the striking ball 224 to continuously strike the first material box 213 and the second material box 214, and the vibration of the box promotes the material conveying work.

[0094] Furthermore, such as Figures 6 to 8As shown, the limiting component 23 includes a barrier plate 231 that passes through the first feed box 213 and the second feed box 214 respectively and is used to block the output of the main raw material 300 or the pore-forming agent 400; a U-shaped buckle 232 that is connected to the first feed box 213 and the second feed box 214 respectively and is used to limit the barrier plate 231; a trigger block 233 connected to the barrier plate 231; and a spring 234 connected to the trigger block 233.

[0095] In this embodiment, by setting the limiting component 23, the laying component will move to the left or right once each time it reaches the edge position during the back-and-forth laying process, so as to complete the exchange of the output position between the main raw material 300 and the pore-forming agent 400. At this time, the limiting component 23 can quickly complete the closing of the output port on one side edge position, preventing the filler from being output outside the molding space, saving filler and preventing dust from escaping.

[0096] In detail, when the first feeding box 213 and the second feeding box 214 are moved to one side as a whole and pushed by the protrusion 217, the outlet on one side of the moving direction will exceed the forming space defined by the first shaping plate 113. At the same time, the trigger block 233 on the corresponding side is driven to press against the support frame 211, which causes the spring 234 to contract and the blocking plate 231 to block the corresponding outlet. Meanwhile, the outlet on the other side that was originally blocked is opened after the blocking plate 231 and the trigger block 233 are reset under the action of the spring 234.

[0097] Furthermore, such as Figures 1 to 3 and Figure 6 as well as Figure 9 As shown, the control component 24 includes a second drive cylinder 241 mounted on the chassis 200, a push frame 242 connected to the output end of the second drive cylinder 241 and connected to two sets of receiving plates 112, two sets of three-way pipes 243 connected to the chassis 200, valve balls 244 connected to the three-way pipes 243, a drive shaft 245 connected to the chassis 200 and connected to the two sets of valve balls 244, a fourth gear 246 connected to the drive shaft 245, a fourth rack 247 connected to the push frame 242 and meshing with the fourth gear 246, and a conduit 248 connected to the three-way pipes 243 and communicating with the corresponding first feed box 213 and second feed box 214.

[0098] In this embodiment, by setting the control component 24 in conjunction with two sets of mold components 11, the feeding of the filler material and the extrusion molding process are carried out simultaneously during the forming of the insulation board 100, making the production process more coordinated and unified, which is conducive to improving production efficiency.

[0099] In detail, after the mold assembly 11 in the middle position is reset from the top downwards, the second drive cylinder 241 drives the two sets of receiving plates 112 to move their positions through the push frame 242, and starts the next molding operation. At the same time, when the push frame 242 moves, it drives the fourth rack 247 to mesh with the fourth gear 246, so that the two sets of valve balls 244 connected to the transmission shaft 245 rotate 90°, thereby changing the conveying direction of the two sets of three-way pipes 243.

[0100] It should be noted that the conduit 248 is a flexible tube and will not obstruct the delivery of the main raw material 300 and the pore-forming agent 400.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for producing a high-temperature resistant nanoporous insulation board, characterized in that, Includes the following steps: Step 1, Material Preparation: Mix 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer to form the main raw material. Step 2, Filling: Take an appropriate amount of the main raw material and pore-forming agent for filling. The main raw material and pore-forming agent are simultaneously filled into the mold assembly vertically. Each horizontal layer of pore-forming agent is evenly embedded in the main raw material in a dotted pattern, and the vertical pore-forming agent is staggered within the main raw material. Step 3, leveling process, until all filler material is filled, the main raw material located at the edge of the mold assembly automatically gathers towards the center through the closing action of the mold assembly; Step 4: Stamping process. After the flattening is completed, the filler is pressed under high pressure to form a block-shaped sheet. The mold assembly includes a track connected to the chassis, two sets of support plates connected to the track, two sets of first shaping plates connected to the support plates, two sets of mounting seats connected to the support plates, mounting rods connected to the mounting seats, telescopic components connected to the support plates and connected to the two sets of mounting seats, a second shaping plate connected to the mounting rods via torsion springs, and two sets of guide plates disposed on both sides of the track for pressing the mounting seats.

2. The method for producing a high-temperature resistant nanoporous insulation board according to claim 1, characterized in that, It also includes an output process, in which the formed sheet material in step four is lifted upward and the front and rear ends of the mold assembly are opened. The sheet material is pushed horizontally to output while the inner wall of the mold assembly is cleaned. The positions of the two sets of mold assemblies are swapped to start pressing the next set of sheet material.

3. The method for producing a high-temperature resistant nanoporous insulation board according to claim 1, characterized in that, The molding pressure in step four is between 25 and 95 MPa.

4. The method for producing a high-temperature resistant nanoporous insulation board according to claim 1, characterized in that, In step four, the high-temperature sintering temperature of the pressed and shaped sheet is between 250°C and 450°C.

5. A high-temperature resistant nanoporous insulation board, prepared by the production method of a high-temperature resistant nanoporous insulation board according to any one of claims 1 to 4, characterized in that, The main raw materials include the following parts by weight: 15-20% fumed silica, 40-50% fumed alumina, 10-15% nano titanium dioxide, 10-15% ultrafine silicon carbide, 4-5% alumina fiber, and 4-5% high-temperature stabilizer.

6. The high-temperature resistant nanoporous insulation board according to claim 5, characterized in that, It includes a main body layer and a heat insulation layer. The main body layer is formed from a main raw material, and the heat insulation layer is formed from a pore-forming agent. The heat insulation layer is embedded inside the main body layer and is arranged in several groups at equal intervals along the thickness direction of the main body layer, wherein two adjacent groups of heat insulation layers along the thickness direction are staggered.

7. The high-temperature resistant nanoporous insulation board according to claim 5, characterized in that, The long-term operating temperature range is -250℃ to 1100℃.

8. The high-temperature resistant nanoporous insulation board according to claim 5, characterized in that, The short-term temperature resistance peak range is 1200-1300℃.

9. A high-temperature resistant nanoporous insulation board according to claim 5, characterized in that, At a high temperature of 800℃, its thermal conductivity is 0.025-0.035 W / (m·K).

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