Preparation method of aerogel heat insulation sheet

Abstract

The invention relates to the technical field of aerogel heat insulation sheet processing and preparation, in particular to a preparation method of an aerogel heat insulation sheet, which is mainly completed through cooperation of hot-pressing composite molding equipment, the hot-pressing composite molding equipment comprises a portal frame, a hydraulic telescopic cylinder is fixedly mounted in the middle of the portal frame, and a hot-pressing mechanism is mounted at the bottom of an output shaft of the hydraulic telescopic cylinder; a supporting mechanism located below the hot pressing mechanism is arranged below the portal frame, and side pressing mechanisms are installed on the periphery of the portal frame. The single driving source is adopted for driving the hot pressing mechanism and the side pressing mechanism to be in linkage fit, stepped hot pressing compounding of the multiple aerogel heat insulation sheets is achieved, the hot pressing mechanism can also be in linkage with the side pressing mechanism to apply pressure to the edge of the upper hot pressing plate on the outermost side after pressing the aerogel heat insulation sheets, meanwhile, the upper hot pressing plates are stacked and pressed, and the heat insulation performance of the aerogel heat insulation sheets is improved. The pressure of the edge of the upper hot pressing plate is increased, hot pressing of the whole upper hot pressing plate is more uniform, and the hot pressing area does not need to be larger than the area of the aerogel heat insulation sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of processing and preparation of aerogel heat insulation sheets, and particularly to a preparation method of aerogel heat insulation sheets. Background Art

[0002] The polymer aerogel composite multi-layer sheet is an aerogel heat insulation sheet formed by combining aerogel and polymer film through lamination or hot pressing processes. It has advantages such as ultra-light weight, excellent heat insulation performance, and good mechanical flexibility. The hot pressing and forming preparation method of the aerogel heat insulation sheet generally includes steps such as sheet stacking, putting into equipment, hot pressing and forming, pressure and temperature maintaining, trimming, performance detection, and surface treatment. Among them, hot pressing and forming is the most important step.

[0003] In the process of hot pressing and compounding and forming the polymer aerogel composite multi-layer sheet, generally, the polymer sheet layer and the aerogel sheet layer are alternately placed, and then a hot pressing and compounding machine is used to perform hot pressing and compounding to form the aerogel heat insulation sheet. However, the above hot pressing and compounding method still has the following deficiencies: 1. The existing hot pressing and compounding machines generally use a single hot pressing plate to press the aerogel heat insulation sheet downward. During the hot pressing and compounding process, the pressure on the aerogel heat insulation sheet at the edge of the hot pressing plate is small, resulting in relatively low hot pressing quality of the aerogel heat insulation sheet near the edge of the hot pressing plate. If the size of the hot pressing plate is larger than the size of the aerogel heat insulation sheet, it is easy to reduce the effective utilization rate of the hot pressing plate and increase the production cost; 2. After the hot pressing and compounding machine completes the hot pressing and compounding of the aerogel heat insulation sheet, a conveying mechanism is required to send the aerogel heat insulation sheet out of the inside of the hot pressing and compounding machine, and then a palletizing mechanism is used to palletize the aerogel heat insulation sheet. The conveying and palletizing are carried out step by step. On the one hand, it affects the production and processing efficiency of the aerogel heat insulation sheet, and on the other hand, both the conveying mechanism and the palletizing mechanism need to occupy a large space, increasing the production cost of the aerogel heat insulation sheet. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a preparation method of an aerogel heat insulation sheet, which is mainly completed in cooperation with a hot pressing and compounding forming device. The hot pressing and compounding forming device includes a gantry, a hydraulic telescopic cylinder is fixedly installed in the middle of the gantry, a hot pressing mechanism is installed at the bottom of the output shaft of the hydraulic telescopic cylinder, a support mechanism located below the hot pressing mechanism is arranged below the gantry, side pressing mechanisms are installed on all four sides of the gantry, and a discharging mechanism is arranged outside the support mechanism.

[0005] The hot pressing mechanism includes a total pressing plate fixedly connected to the bottom of the hydraulic telescopic cylinder. A number of groups of equally spaced elastic telescopic rods are fixedly installed at the bottom of the total pressing plate. Below the total pressing plate, there are a number of upper hot pressing components arranged in a stepped manner and overlapping and splicing with each other. The upper hot pressing components are fixedly connected to the lower ends of the corresponding group of elastic telescopic rods.

[0006] The support mechanism includes a support component with a stepped structure at the top. A number of lower hot pressing components are arranged at the top of the support component, and a lifting adjustment component for driving the lifting and adjustment of the lower hot pressing components is installed inside the support component.

[0007] The side pressing mechanism includes a fixed component installed on the gantry. A side pressing component is rotatably installed on the side of the fixed component close to the hot pressing mechanism. A driving component for driving the side pressing component to rotate towards the side close to the hot pressing mechanism by the downward movement of the hot pressing mechanism is installed on the side of the side pressing component.

[0008] The preparation method of the aerogel heat insulation sheet specifically includes the following steps:

[0009] S1. Place the stacked aerogel sheets into the hot pressing and composite molding equipment;

[0010] S2. First, heat the hot pressing and composite molding equipment to a predetermined hot pressing temperature at a set heating rate, then gradually increase the pressure and maintain it for a period of time under a constant pressure to perform hot pressing molding processing on the aerogel sheets;

[0011] S3. Trim the edges of the hot-pressed aerogel sheets to remove excess materials and flash to achieve the specified dimensional and shape accuracy;

[0012] S4. Perform various performance tests on the molded product, such as density, thermal conductivity, compressive strength, flexibility, etc., to evaluate whether the product meets the design requirements.

[0013] In a possible implementation manner, the elastic telescopic rods are symmetrically installed at the top of the corresponding upper hot pressing components. The lengths of several groups of the elastic telescopic rods increase step by step and equally from left to right, and the elastic coefficients of several groups of the elastic telescopic rods decrease step by step and equally from left to right.

[0014] In a possible implementation manner, the upper hot pressing component includes an upper hot pressing plate fixedly connected to the bottom of the elastic telescopic rod. Several of the upper hot pressing plates are distributed step by step and downward in a stepped shape from left to right. Side pressing grooves are provided at the front, rear, left, and right ends of the rightmost upper hot pressing plate and at the front, rear, and left ends of the remaining upper hot pressing plates. Except for the rightmost upper hot pressing plate, side pressing plates are installed at the left ends of the remaining upper hot pressing plates and are matched with the adjacent side pressing grooves.

[0015] In a possible implementation manner, the support assembly includes a support table located below the hot pressing mechanism. The top of the support table is provided with a plurality of stepped surfaces, and the plurality of stepped surfaces are gradually and equally reduced from left to right. The lower hot pressing assemblies correspond to the stepped surfaces one by one. The lower hot pressing assembly includes a lower hot pressing plate arranged on the top of the stepped surface. The leftmost lower hot pressing plate is fixedly connected to the corresponding stepped surface. The bottoms of the other lower hot pressing plates are all fixedly connected with guide rods. A rubber damping sleeve is fixedly sleeved on the outer surface of the guide rod, and the rubber damping sleeve is slidably installed up and down inside the support table.

[0016] In a possible implementation manner, the lifting and adjusting assembly includes a support block. Except for the leftmost lower hot pressing plate, the bottoms of the other lower hot pressing plates are all fixedly connected with support blocks. The thicknesses of the support blocks arranged from left to right increase gradually and equally. A jacking frame with a stepped top is slidably installed left and right inside the support table. The jacking frame is matched with the support blocks. A multi-stage hydraulic cylinder for pushing it to move left and right is arranged inside the jacking frame. The multi-stage hydraulic cylinder is fixedly installed inside the support table. The leftmost pushing end of the multi-stage hydraulic cylinder is fixedly connected to the inner wall of the jacking frame.

[0017] In a possible implementation manner, the fixing assembly includes a mounting frame fixedly connected to the gantry. A baffle is fixedly connected to the side of the mounting frame away from the hot pressing mechanism. The side pressing assembly includes a pressing plate rotatably installed at the bottom of the mounting frame. A tension spring is fixedly connected between the pressing plate and the baffle.

[0018] In a possible implementation manner, the driving assembly includes a gear coaxially connected to the pressing plate. A rack is fixedly connected to one end of the total pressing plate close to the side pressing mechanism. The rack is matched with the gear.

[0019] In a possible implementation manner, the discharging mechanism includes reciprocating conveying assemblies symmetrically distributed on the front and rear sides of the support mechanism for stacking and discharging the aerogel heat insulation sheets on the stepped support mechanism. A double-shaft motor for driving the reciprocating conveying assemblies to operate is arranged at the left end of the support mechanism. A guiding assembly is arranged on the reciprocating conveying assemblies.

[0020] In a possible implementation manner, the reciprocating conveying assembly includes a chain conveyor arranged parallel to the support table and installed on the same horizontal plane as the support table. A support rod is installed on the top of the chain conveyor. A plurality of vertically and equally spaced pushing plates are fixedly connected to the side of the support rod close to the support mechanism. The pushing plates are matched with the lower hot pressing plates. The double-shaft motor is in transmission connection with the chain conveyor.

[0021] In a possible implementation manner, the guiding component includes a guide rail slidably mounted on the side of the support rod away from the support mechanism, and the guide rail is fixedly connected to the reciprocating conveying component through a vertical rod.

[0022] Advantages of the present invention: 1. The present invention uses a single drive source to drive the linkage cooperation of the hot pressing mechanism and the side pressing mechanism to achieve stepped hot pressing and compounding of multiple aerogel heat insulation sheets. After the hot pressing mechanism presses the aerogel heat insulation sheet tightly, it can also drive the side pressing mechanism to press the edge of the outermost upper hot pressing plate, and at the same time, the upper hot pressing plates are superposed and pressed against each other, improving the pressure on the edge of the upper hot pressing plate, making the hot pressing of the entire upper hot pressing plate more uniform, without the need to make the hot pressing area larger than the area of the aerogel heat insulation sheet, maximizing the utilization of the hot pressing source and reducing production costs.

[0023] 2. The present invention uses a deformable support mechanism to carry the aerogel heat insulation sheet. After the aerogel heat insulation sheet is hot pressed into shape, the support mechanism can be converted from a horizontal state to a stepped state, and then cooperate with multiple push plates in the discharging mechanism to push the multiple aerogel heat insulation sheets on the support mechanism step by step to the right, thereby realizing the stacking and discharging of multiple aerogel heat insulation sheets, improving the processing efficiency of the aerogel heat insulation sheet and reducing the production cost of the aerogel heat insulation sheet. Description of the Drawings

[0024] Figure 1 is a schematic three-dimensional structure diagram of the hot pressing and compounding forming equipment of the present invention.

[0025] Figure 2 is a front view sectional view of the hot pressing and compounding forming equipment of the present invention.

[0026] Figure 3 is a schematic three-dimensional structure diagram of the hot pressing mechanism in the hot pressing and compounding forming equipment of the present invention.

[0027] Figure 4 is a schematic three-dimensional structure diagram of the support mechanism in the hot pressing and compounding forming equipment of the present invention.

[0028] Figure 5 is a plan view structure diagram of the support mechanism in the hot pressing and compounding forming equipment of the present invention.

[0029] Figure 6 is a schematic three-dimensional structure diagram of the side pressing mechanism in the hot pressing and compounding forming equipment of the present invention.

[0030] Figure 7 is a schematic three-dimensional structure diagram of the discharging mechanism in the hot pressing and compounding forming equipment of the present invention.

[0031] Figure 8 is a right view of the discharging mechanism in the hot pressing and compounding forming equipment of the present invention.

[0032] In the figure: 1. Gantry; 2. Hydraulic telescopic cylinder; 3. Hot pressing mechanism; 31. Total pressing plate; 32. Elastic telescopic rod; 33. Upper hot pressing assembly; 331. Upper hot pressing plate; 332. Side pressing groove; 333. Side pressing plate; 4. Support mechanism; 41. Support assembly; 411. Support table; 412. Step surface; 42. Lower hot pressing assembly; 421. Lower hot pressing plate; 422. Guide rod; 423. Rubber damping sleeve; 43. Lifting and adjusting assembly; 431. Support block; 432. Jacking frame; 433. Multi-stage hydraulic cylinder; 5. Side pressing mechanism; 51. Fixed assembly; 511. Mounting frame; 512. Baffle; 52. Side pressing assembly; 521. Pressing plate; 522. Tension spring; 53. Driving assembly; 531. Gear; 532. Rack; 6. Discharging mechanism; 61. Reciprocating conveying assembly; 611. Chain conveyor; 612. Support rod; 613. Pushing plate; 62. Biaxial motor; 63. Guide assembly; 631. Guide rail; 632. Vertical rod. Detailed implementation manners

[0033] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0034] Please refer to Figure 1 and Figure 2 , a preparation method of an aerogel heat insulation sheet, specifically including the following steps:

[0035] S1. Place the stacked aerogel sheets into a hot pressing and composite molding device;

[0036] S2. First, heat the hot pressing and composite molding device to a predetermined hot pressing temperature according to the set heating rate, then gradually increase the pressure and maintain it for a period of time under a constant pressure to perform hot pressing molding processing on the aerogel sheets;

[0037] S3. Trim the edges of the hot-pressed aerogel sheets to remove excess materials and flash to achieve the specified dimensional and shape accuracy;

[0038] S4. Perform various performance tests on the formed product, such as density, thermal conductivity, compressive strength, flexibility, etc., to evaluate whether the product meets the design requirements.

[0039] The hot pressing and composite forming equipment includes a gantry 1. A hydraulic telescopic cylinder 2 is fixedly installed in the middle of the gantry 1. A hot pressing mechanism 3 is installed at the bottom of the output shaft of the hydraulic telescopic cylinder 2. A support mechanism 4 is arranged below the gantry 1 and below the hot pressing mechanism 3. Side pressing mechanisms 5 are installed on all four sides of the gantry 1. A discharging mechanism 6 is arranged outside the support mechanism 4.

[0040] Please refer to Figure 1 、 Figure 2 and Figure 3 , the hot pressing mechanism 3 includes a total pressing plate 31 fixedly connected to the bottom of the hydraulic telescopic cylinder 2. A number of groups of equally spaced elastic telescopic rods 32 are fixedly installed at the bottom of the total pressing plate 31. A number of upper hot pressing components 33 arranged in a stepped manner and overlapping and splicing each other are arranged below the total pressing plate 31. The upper hot pressing components 33 are fixedly connected to the lower ends of the corresponding group of elastic telescopic rods 32.

[0041] Please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the support mechanism 4 includes a support component 41. A number of lower hot pressing components 42 are arranged at the top of the support component 41. A lifting adjustment component 43 for driving the lower hot pressing components 42 to perform lifting adjustment is installed inside the support component 41.

[0042] Please refer to Figure 1 and Figure 6 , the side pressing mechanism 5 includes a fixed component 51 installed on the gantry 1. A side pressing component 52 is rotatably installed on one side of the fixed component 51 close to the hot pressing mechanism 3. A driving component 53 for driving the side pressing component 52 to rotate towards the side close to the hot pressing mechanism 3 by the downward movement of the hot pressing mechanism 3 is installed on the side of the side pressing component 52.

[0043] Please refer to Figure 3 , the elastic telescopic rods 32 are symmetrically installed at the tops of the corresponding upper hot pressing components 33. The lengths of a number of groups of elastic telescopic rods 32 increase step by step and equally from left to right. The elastic coefficients of a number of groups of elastic telescopic rods 32 decrease step by step and equally from left to right.

[0044] Please refer to Figure 1 and Figure 3, the upper hot pressing assembly 33 includes an upper hot pressing plate 331 fixedly connected to the bottom of the elastic telescopic rod 32. A plurality of upper hot pressing plates 331 are distributed step by step downward from left to right in a stepped shape. Side pressing grooves 332 are formed at the front, rear, left, and right ends of the rightmost upper hot pressing plate 331 and at the front, rear, and left ends of the remaining upper hot pressing plates 331. Except for the rightmost upper hot pressing plate 331, side pressing plates 333 are installed at the left ends of the remaining upper hot pressing plates 331 and are matched with the adjacent side pressing grooves 332. When the hydraulic telescopic cylinder 2 pushes the total pressing plate 31 downward, the rightmost upper hot pressing plate 331 first presses on the rightmost aerogel heat insulation sheet, and then the other upper hot pressing plates 331 are pressed down one by one in the order from right to left. When the upper hot pressing plate 331 is pressed down, the side pressing plate 333 on the upper hot pressing plate 331 is pressed into the adjacent side pressing groove 332. After all the upper hot pressing plates 331 are pressed down, all the upper hot pressing plates 331 are spliced and combined together.

[0045] Please refer to Figures 1 to 5 , the support assembly 41 includes a support table 411 located below the hot pressing mechanism 3. A plurality of stepped surfaces 412 are provided at the top of the support table 411. The heights of the plurality of stepped surfaces 412 decrease step by step in equal amounts from left to right. The lower hot pressing assemblies 42 correspond to the stepped surfaces 412 one by one. The lower hot pressing assembly 42 includes a lower hot pressing plate 421 provided at the top of the stepped surface 412. Electric heating tubes are installed inside both the lower hot pressing plate 421 and the upper hot pressing plate 331. The leftmost lower hot pressing plate 421 is fixedly connected to the corresponding stepped surface 412. Guide rods 422 are fixedly connected to the bottoms of the other lower hot pressing plates 421. Rubber damping sleeves 423 are fixedly sleeved on the outer surfaces of the guide rods 422. The rubber damping sleeves 423 are slidably installed up and down inside the support table 411. The rubber damping sleeves 423 play a role in damping and buffering, enabling the lower hot pressing plate 421 to move downward at a uniform speed and preventing the lower hot pressing plate 421 from suddenly falling and causing the aerogel heat insulation sheet placed thereon to shift.

[0046] Please refer to Figure 4 and Figure 5, the lifting and adjusting assembly 43 includes a support block 431. The bottom of each lower hot pressing plate 421 except the leftmost one is fixedly connected with a support block 431. The thickness of the support blocks 431 arranged from left to right increases step by step in equal amounts. A jacking frame 432 with a stepped top is slidably installed left and right inside the support platform 411. The jacking frame 432 cooperates with the support block 431. A multi-stage hydraulic cylinder 433 for pushing it to move left and right is arranged inside the jacking frame 432. The multi-stage hydraulic cylinder 433 is fixedly installed inside the support platform 411. The leftmost pushing end of the multi-stage hydraulic cylinder 433 is fixedly connected to the inner wall of the jacking frame 432. When the multi-stage hydraulic cylinder 433 drives the jacking frame 432 to move to the right, the jacking frame 432 pushes the remaining lower hot pressing plates 421 except the leftmost one to move upward in sequence, so that the upper end faces of all the lower hot pressing plates 421 are on the same plane. When the multi-stage hydraulic cylinder 433 drives the jacking frame 432 to move to the left, except for the leftmost lower hot pressing plate 421, the other lower hot pressing plates 421 move downward in sequence to resume a stepped distribution, facilitating the stacking and discharging of the aerogel heat insulation sheets to the right.

[0047] Please refer to Figure 1 and Figure 6 , the fixing assembly 51 includes a mounting frame 511 fixedly connected to the gantry 1. A baffle 512 is fixedly connected to the side of the mounting frame 511 away from the hot pressing mechanism 3. The side pressing assembly 52 includes a pressing plate 521 rotatably installed at the lower end of the mounting frame 511. A tension spring 522 is fixedly connected between the pressing plate 521 and the baffle 512.

[0048] Please refer to Figure 1 , Figure 3 and Figure 6 , the driving assembly 53 includes a gear 531 coaxially connected to the pressing plate 521. A rack 532 is fixedly connected to one end of the total pressing plate 31 close to the side pressing mechanism 5. The rack 532 cooperates with the gear 531. When all the upper hot pressing plates 331 are pressed onto the aerogel heat insulation sheet, the total pressing plate 31 continues to move downward. At this time, the rack 532 cooperates with the gear 531 and drives the gear 531 to rotate, so that the pressing plate 521 rotates 90 degrees in the direction close to the upper hot pressing plate 331, and the pressing plate 521 is pressed into the adjacent side pressing groove 332, increasing the pressure at the edge of the upper hot pressing plate 331 and making the hot pressing of the entire upper hot pressing plate 331 more uniform.

[0049] Please refer to Figure 1 , Figure 7 and Figure 8 , the discharging mechanism 6 includes reciprocating conveying components 61 symmetrically distributed on the front and back sides of the supporting mechanism 4 and used for stacking and discharging the aerogel heat insulation sheets. A double-shaft motor 62 for driving the reciprocating conveying components 61 to operate is arranged at the left end of the supporting mechanism 4. A guiding component 63 is arranged on the reciprocating conveying components 61.

[0050] See also Figure 1 , Figure 7 and Figure 8 The reciprocating conveying assembly 61 includes a chain conveyor 611 which is arranged parallel to the support platform 411 and installed on the same horizontal plane as the support platform 411. A support rod 612 is installed on the top of the chain conveyor 611. A plurality of vertically equidistantly distributed push plates 613 are fixedly connected to the side of the support rod 612 close to the support mechanism 4. The push plates 613 cooperate with the lower hot pressing plate 421. The number of push plates 613 and the lower hot pressing plate 421 is the same and corresponds one to one. The dual-axis motor 62 is connected to the chain conveyor 611 in transmission. After the aerogel insulation sheet is hot-pressed and composited, the support mechanism 4 switches to a stepped form, such as Figure 8 As shown, at this time, the bottom surface of the push plate 613 is just aligned with the top surface of the corresponding lower hot pressing plate 421, and the support rod 612 is driven to move to the right by the chain belt conveyor 611, so that the push plate 613 pushes the aerogel insulation sheet on the lower hot pressing plate 421 to the right step by step, and the push plate 613 can pass between the upper and lower adjacent lower hot pressing plates 421, so that the aerogel insulation sheets can be stacked together and sent to the right together, which is convenient for the stacking and unloading of the aerogel insulation sheets.

[0051] See also Figure 1 , Figure 7 and Figure 8 The guide assembly 63 includes a guide rail 631 slidably mounted on the side of the support rod 612 away from the support mechanism 4. The guide rail 631 is fixedly connected to the reciprocating conveying assembly 61 through a vertical rod 632. The guide rail 631 supports and guides the support rod 612, making the support rod 612 more stable when moving.

[0052] When in use, the upper end surfaces of several 421 are on the same horizontal plane, the stacked aerogel insulation sheets are placed on the corresponding lower hot pressing plates 421, and then the hydraulic telescopic cylinder 2 pushes the hot pressing mechanism 3 to move downward, so that the upper hot pressing plates 331 press the aerogel insulation sheets one by one from right to left. During pressing, the side pressing plates 333 are pressed tightly in the adjacent side pressing grooves 332. When all the upper hot pressing plates 331 are pressed onto the aerogel insulation sheets, all the upper hot pressing plates 331 are combined into a whole.

[0053] Afterwards, the total pressure plate 31 drives the rack 532 to continue to move downward, and the rack 532 drives the gear 531 to rotate, so that the clamping plate 521 rotates inward and is pressed on the adjacent side pressure groove 332, thereby increasing the pressure on the edge of the upper hot pressing plate 331 and improving the pressing effect on the aerogel insulation sheet. Afterwards, the electric heating tubes inside the upper hot pressing plate 331 and the lower hot pressing plate 421 are turned on to perform hot pressing and compounding on the aerogel insulation sheet.

[0054] After the hot pressing and compounding are completed, turn off the electric heating tube. The hydraulic telescopic cylinder 2 drives the total pressing plate 31 to move upward. At this time, the rack 532 will first drive the gear 531 to rotate in the reverse direction, causing the pressing plate 521 to rotate 90 degrees away from the upper hot pressing plate 331. Then, the total pressing plate 31 drives the elastic telescopic rod 32 and the upper hot pressing assembly 33 to move upward together, so that the upper hot pressing plate 331 is completely separated from the aerogel heat insulation sheet.

[0055] After that, the multi-stage hydraulic cylinder 433 pushes the jacking frame 432 to move to the left. At this time, the lower hot pressing plate 421 that loses the support of the jacking frame 432 will move downward to the stepped surface 412, so that several lower hot pressing plates 421 are distributed in a stepped shape. Then, the chain conveyor 611 drives the support rod 612 to move to the right. At this time, the pushing plate 613 will push the aerogel heat insulation sheet from left to right to drop step by step, so that the aerogel heat insulation sheets can be stacked together. Finally, the stacked aerogel heat insulation sheets can be pushed out together.

[0056] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] The embodiments of the specific implementation manners are all the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A preparation method of an aerogel heat insulation sheet, which is mainly completed by cooperating with a hot pressing and composite molding device. The hot pressing and composite molding device includes a gantry, and is characterized in that: A hydraulic telescopic cylinder is fixedly installed in the middle of the gantry. A hot pressing mechanism is installed at the bottom of the output shaft of the hydraulic telescopic cylinder. A supporting mechanism is arranged below the gantry and below the hot pressing mechanism. Side pressing mechanisms are installed on all four sides of the gantry. An unloading mechanism is arranged outside the supporting mechanism; The hot pressing mechanism includes a total pressing plate fixedly connected to the bottom of the hydraulic telescopic cylinder. A number of groups of equally spaced elastic telescopic rods are fixedly installed at the bottom of the total pressing plate. A number of upper hot pressing components arranged in a stepped manner and overlapping and splicing each other are arranged below the total pressing plate. The upper hot pressing components are fixedly connected to the lower ends of a corresponding group of elastic telescopic rods; The supporting mechanism includes a supporting component. A number of lower hot pressing components are arranged at the top of the supporting component. A lifting adjustment component for driving the lifting and adjustment of the lower hot pressing components is installed inside the supporting component; The side pressing mechanism includes a fixing component installed on the gantry. A side pressing component is rotatably installed on one side of the fixing component close to the hot pressing mechanism. A driving component for driving the side pressing component to rotate towards the side close to the hot pressing mechanism by the downward movement of the hot pressing mechanism is installed on the side of the side pressing component; The preparation method of the aerogel heat insulation sheet specifically includes the following steps: S1. Place the stacked aerogel sheets into the hot pressing and composite forming equipment; S2. First heat the hot pressing and composite forming equipment to a predetermined hot pressing temperature at a set heating rate, then gradually increase the pressure and maintain it for a period of time under a constant pressure to perform hot pressing forming processing on the aerogel sheets; S3. Trim the edges of the hot pressed aerogel sheets to remove excess materials and flash to meet the specified dimensional and shape accuracy; S4. Perform various performance tests on the formed product to evaluate whether the product meets the design requirements.

2. The preparation method of the aerogel heat insulation sheet according to claim 1, characterized in that: The elastic telescopic rods are symmetrically installed at the top of the corresponding upper hot pressing components. The lengths of a number of groups of elastic telescopic rods increase step by step and equally from left to right. The elastic coefficients of a number of groups of elastic telescopic rods decrease step by step and equally from left to right.

3. The preparation method of the aerogel heat insulation sheet according to claim 2, characterized in that: The upper hot pressing component includes an upper hot pressing plate fixedly connected to the bottom of the elastic telescopic rod. A number of the upper hot pressing plates are distributed step by step and downward in a stepped manner from left to right. Side pressing grooves are formed at the front, rear, left, and right four ends of the rightmost upper hot pressing plate and at the front, rear, and left three ends of the remaining upper hot pressing plates. Except for the rightmost upper hot pressing plate, side pressing plates matched with the adjacent side pressing grooves are installed at the left ends of the remaining upper hot pressing plates.

4. The preparation method of the aerogel heat insulation sheet according to claim 1, characterized in that: The supporting component includes a supporting platform located below the hot pressing mechanism. A number of stepped surfaces are arranged at the top of the supporting platform. The heights of a number of the stepped surfaces decrease step by step and equally from left to right. The lower hot pressing components correspond to the stepped surfaces one by one. The lower hot pressing component includes a lower hot pressing plate arranged at the top of the stepped surface. The leftmost lower hot pressing plate is fixedly connected to the corresponding stepped surface. The bottoms of the other lower hot pressing plates are fixedly connected with guide rods. Rubber damping sleeves are fixedly sleeved on the outer surfaces of the guide rods. The rubber damping sleeves are slidably installed up and down inside the supporting platform.

5. The preparation method of the aerogel heat insulation sheet according to claim 4, characterized in that: The lifting and adjusting assembly includes a support block. The bottom of each of the lower hot pressing plates, except for the leftmost one, is fixedly connected to a support block. The thickness of the support blocks arranged from left to right increases step by step in equal amounts. A jacking frame with a stepped top is slidably installed left and right inside the support platform. The jacking frame cooperates with the support block. A multi-stage hydraulic cylinder for pushing it to move left and right is arranged inside the jacking frame. The multi-stage hydraulic cylinder is fixedly installed inside the support platform, and the leftmost pushing end of the multi-stage hydraulic cylinder is fixedly connected to the inner wall of the jacking frame.

6. The preparation method of the aerogel heat insulation sheet according to claim 1, characterized in that: The fixing assembly includes a mounting frame fixedly connected to the gantry. A baffle is fixedly connected to the side of the mounting frame away from the hot pressing mechanism. The side pressing assembly includes a pressing plate rotatably installed at the lower end of the mounting frame. A tension spring is fixedly connected between the pressing plate and the baffle.

7. A hot pressing composite forming device according to claim 6, characterized in that: The driving assembly includes a gear coaxially connected to the pressing plate. A rack is fixedly connected to one end of the total pressing plate close to the side pressing mechanism. The rack cooperates with the gear.

8. The preparation method of the aerogel heat insulation sheet according to claim 4, characterized in that: The discharging mechanism includes reciprocating conveying assemblies symmetrically distributed on the front and rear sides of the supporting mechanism and used for stacking and discharging the aerogel heat insulation sheets. A double-shaft motor for driving the reciprocating conveying assemblies to operate is arranged at the left end of the supporting mechanism. A guiding assembly is arranged on the reciprocating conveying assembly.

9. The preparation method of the aerogel heat insulation sheet according to claim 8, wherein: The reciprocating conveying assembly includes a chain conveyor arranged parallel to the support platform and installed on the same horizontal plane as the support platform. A support rod is installed on the top of the chain conveyor. A number of vertically and equally spaced pushing plates are fixedly connected to the side of the support rod close to the supporting mechanism. The pushing plates cooperate with the lower hot pressing plates. The double-shaft motor is in transmission connection with the chain conveyor.

10. The preparation method of the aerogel heat insulation sheet according to claim 9, wherein: The guiding assembly includes a guide rail slidably installed on the side of the support rod away from the supporting mechanism. The guide rail is fixedly connected to the reciprocating conveying assembly through a vertical rod.

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