Pre-stiffening / strengthening forming die for ultra-light fibrosis framework material

Abstract

The invention provides a pre-stiffening / strengthening forming die for an ultra-light fibrosis framework material, and belongs to the technical field of thermal insulation materials, the die comprises a pressure head assembly and a cavity; the pressure head assembly comprises a pressure head arranged in the cavity, a filter pressing rod penetrating through the top end of the cavity and connected with the pressure head, and an elastic component sleeving the filter pressing rod; one end of the filter pressing rod is connected with the pressure head, and the other end is provided with a pushing part for controlling the pressure head to move; the top end of the cavity is of a detachable structure, and the bottom end is open; a first limiting part for limiting the position of the elastic part is arranged at the top end of the cavity; a side leakage hole is formed in the side wall of the cavity; a detachable bushing matched with the inner wall of the cavity and a bracket for supporting the detachable bushing are arranged in the cavity; and a lower leakage hole is formed in the detachable leakage plate. The mold provided by the invention is flexible and simple to operate, high in liquid discharge efficiency and good in forming stability, and a chopped fiber skeleton wet blank with stable and controllable thickness can be prepared.

Description

Technical Field

[0001] The present invention relates to the technical field of heat insulation materials, and particularly to a pre-rigidification / strengthening forming die for an ultra-lightweight fibrous skeleton material. Background Art

[0002] A chopped fiber skeleton forms a fibrous network structure through the fixed bonding between adjacent chopped fiber intersection points. This structure endows the material with good properties such as low density, high porosity (and interconnected pores), and low thermal conductivity, and can be used as a rigid skeleton reinforcement for ultra-high temperature thermal protection materials. For extreme environments, high melting point and antioxidant particle fillers need to be introduced into the chopped fiber skeleton to further optimize its heat resistance and antioxidant properties. The forming of the chopped fiber skeleton can use the slurry method, which mainly includes steps such as preparing the slurry, solid-liquid separation, and drying; the solid-liquid separation process usually needs to use a pressure filtration die to achieve forming and endow the material with a certain strength and stiffness.

[0003] However, existing pressure filtration forming dies usually adopt a single-sided drainage structure at the bottom surface and a threaded fastening structure to control the sample thickness, with defects such as single drainage form, low efficiency, and excessive pressure filtration force. During the pressure filtration process, a large amount of liquid fills the pores inside the fiber skeleton. Relying solely on drainage from the bottom surface of the die is too inefficient, and it is easy to have demolding springback to form a loose structure; at the same time, a large amount of liquid flowing downward for drainage will destroy the anisotropic distribution mode of the fiber skeleton itself and weaken the heat insulation effect in the thickness direction; conversely, if the pressure is increased to improve the drainage efficiency, it is easy to cause fiber damage or the fiber skeleton to be too dense, seriously affecting the mechanical / heat insulation performance of the material. In addition, the number and speed of liquid drainage are adjusted by turning bolts. The process is mechanical and cumbersome, the liquid drainage efficiency is low, and the thread accuracy is easily affected by liquid and solid splashes during the pressure filtration process, making the adjustment difficult.

[0004] In addition, during the preparation process of short fiber skeletons for high-temperature heat insulation, due to the large density difference between the ceramic component and the chopped fiber, using existing pressure filtration devices to pressure filter the slurry is likely to cause problems such as sedimentation and stratification of the ceramic component due to low drainage efficiency, which is not conducive to improving the high-temperature resistance performance of the fiber skeleton. Summary of the Invention

[0005] Aiming at one or more technical problems existing in the prior art, the present invention provides a pre-rigidification / strengthening forming die for an ultra-lightweight fibrous skeleton material. The die is flexible, simple to operate, has high liquid drainage efficiency, good forming stability, can produce a wet blank of a chopped fiber skeleton with stable and controllable thickness, and further prepare a chopped fiber composite material with excellent mechanical properties and heat insulation and heat protection properties.

[0006] The present invention provides a pre - stiffening / strengthening forming die for an ultra - lightweight fibrous skeleton material. The die includes a pressing head assembly and a cavity. The pressing head assembly includes a pressing head arranged inside the cavity, a pressure - filtering rod penetrating through the top end of the cavity and connected to the pressing head, and an elastic member sleeved on the pressure - filtering rod. One end of the pressure - filtering rod is connected to the pressing head, and the other end is provided with a pushing member for controlling the movement of the pressing head. The top end of the cavity is a detachable structure, and the bottom end is an open design. The top end of the cavity is provided with a first limiting member for restricting the position of the elastic member. The side wall of the cavity is provided with side leakage holes. Inside the cavity, there is a detachable leakage plate matching the inner wall of the cavity and a bracket for supporting the detachable leakage plate. The detachable leakage plate is provided with downward leakage holes.

[0007] Preferably, the die further includes a second limiting member that cooperates with the side leakage holes for restricting the position of the pressing head.

[0008] Preferably, the die further includes a fixing structure for fixing the pressing head.

[0009] Preferably, the fixing structure includes a fixing groove arranged on the side surface of the pressing head and a fixing member that cooperates with the fixing groove.

[0010] Preferably, the fixing member passes through the side leakage holes and is connected to the fixing groove.

[0011] Preferably, the die further includes a third limiting member that cooperates with the side leakage holes for restricting the positions of the lower end of the detachable leakage plate and the top end of the bracket.

[0012] Preferably, the bracket is an I - shaped bracket.

[0013] Preferably, the bracket is provided with liquid leakage holes communicating with the downward leakage holes.

[0014] Preferably, a liquid discharge hole communicating with the liquid leakage holes is arranged at a position near the bottom end of the side wall of the cavity.

[0015] Preferably, a nylon mesh cloth is laid on the upper surface of the detachable leakage plate.

[0016] The present invention has at least the following beneficial effects compared with the prior art:

[0017] The present invention provides a pre - stiffening / strengthening forming die for ultra - light fibrous skeleton materials. By sleeving an elastic component on the pressure - filtering rod, the deformation amount of the elastic component can be flexibly adjusted under the cooperation of the pushing component and the first limiting component, enabling repeated extrusion in a short time and maintaining good liquid - discharging capacity. In cooperation with the detachable drain plate and the drain holes provided on the side wall of the cavity, multi - surface liquid - discharging can be achieved, with high liquid - discharging efficiency. Without damaging the fiber structure and distribution, the excess liquid in the fiber skeleton can be drained in a short time, which is beneficial to controlling the content of ceramic additives and ensuring more stable inter - layer bonding of the sample. It can effectively improve the problems of low liquid - discharging efficiency caused by single - surface liquid - discharging and easy delamination and damage of the sample in the thickness direction. It can pre - enhance the skeleton strength and stiffness, and at the same time effectively prevent the sedimentation and stratification of ceramic additives during the pressure - filtering process, which may affect the performance of the porous chopped - fiber skeleton.

[0018] By sleeving an elastic component on the pressure - filtering rod, the position of the pressure head during the forming process can be flexibly adjusted under the cooperation of the pushing component and the first limiting component. In cooperation with the detachable drain plate, the thickness of the sample can be flexibly adjusted to obtain a wet blank of chopped - fiber skeleton with stable and controllable thickness, effectively avoiding the problem that the sample is prone to rebound in the thickness direction after demolding and forming a loose structure in the existing chopped - fiber pressure - filtering forming die, and then preparing chopped - fiber composite materials with excellent mechanical properties and thermal properties.

[0019] The pre - stiffening / strengthening forming die for ultra - light fibrous skeleton materials provided by the present invention is flexible, simple to operate, has high liquid - discharging efficiency and good forming stability, can obtain a wet blank of porous chopped - fiber skeleton with stable and controllable thickness, and then prepare chopped - fiber composite materials with excellent mechanical properties and heat - insulation and heat - protection properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the external structure of a pre - stiffening / strengthening forming die for ultra - light fibrous skeleton materials provided by the present invention;

[0022] Figure 2 It is a sectional view of a pre - stiffening / strengthening forming die for ultra - light fibrous skeleton materials provided by the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the pressure - head assembly in a pre - stiffening / strengthening forming die for ultra - light fibrous skeleton materials provided by the present invention;

[0024] Figure 4 It is a schematic structural diagram of a detachable leakage plate in a pre - stiffening / strengthening forming die for a super - light fiberized skeleton material provided by the present invention;

[0025] Figure 5 It is a schematic structural diagram of a bracket in a pre - stiffening / strengthening forming die for a super - light fiberized skeleton material provided by the present invention;

[0026] Figure 6 It is a schematic structural diagram of a forming die for a fiberized skeleton material provided in Comparative Example 1 of the present invention;

[0027] Figure 7 It is a schematic structural diagram of a forming die for a fiberized skeleton material provided in Comparative Example 2 of the present invention;

[0028] Figure 8 It is a macroscopic view of a porous short - cut fiber skeleton obtained after drying and forming the wet blank press - filtered by the forming dies provided in Example 1, Comparative Example 1, and Comparative Example 2 of the present invention;

[0029] Figure 9 It is a macroscopic view of a short - cut fiber skeleton with multiple holes obtained after drying and forming the wet blank press - filtered by the pre - stiffening / strengthening forming die for a super - light fiberized skeleton material of Example 1 of the present invention;

[0030] Figure 10 It is an external surface view of a short - cut fiber skeleton with holes obtained after drying and forming the wet blank press - filtered by the pre - stiffening / strengthening forming die for a super - light fiberized skeleton material of Example 1 of the present invention;

[0031] Figure 11 It is an internal cross - sectional view of a short - cut fiber skeleton with holes obtained after drying and forming the wet blank press - filtered by the pre - stiffening / strengthening forming die for a super - light fiberized skeleton material of Example 1 of the present invention;

[0032] Figure 12 It is a microscopic view of a porous short - cut fiber skeleton obtained after drying and forming the wet blank press - filtered by the pre - stiffening / strengthening forming die for a super - light fiberized skeleton material provided in Example 1 of the present invention.

[0033] Reference numerals:

[0034] 1 - Press head assembly;

[0035] 11 - Press head; 111 - Fixed groove

[0036] 12 - Press - filtering rod;

[0037] 13 - Pushing member;

[0038] 14 - Elastic component;

[0039] 2 - Cavity;

[0040] 21 - First limiting component;

[0041] 22 - Removable leak plate;

[0042] 221 - Lower leakage hole;

[0043] 23 - Side leakage hole;

[0044] 24 - Second limiting component;

[0045] 25 - Fixing component;

[0046] 26 - Third limiting component;

[0047] 27 - Drainage hole;

[0048] 3 - Bracket;

[0049] 31 - Liquid leakage hole. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; unless otherwise specified or stated, the term "multiple groups" means two or more groups; the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. The terms "include", "comprise" or any other variant thereof are intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element. 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 circumstances.

[0052] In the description of this specification, it should be understood that the orientation terms such as "upper" and "lower" described in the embodiments of the present invention are described from the angles shown in the drawings and should not be construed as limitations on the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0053] As Figures 1-5 shown, the present invention provides a pre-stiffening / reinforcing forming die for an ultra-lightweight fibrous skeleton material. The die includes a punch assembly 1 and a cavity 2; the punch assembly 1 includes a punch 11 disposed inside the cavity 2, a pressure filter rod 12 penetrating the top end of the cavity 2 and connected to the punch 11, and an elastic member 14 sleeved on the pressure filter rod 12; one end of the pressure filter rod 12 is connected to the punch 11, and the other end is provided with a pushing member 13 for controlling the movement of the punch 11; the top end of the cavity 2 is a detachable structure, and the bottom end is an open design; the top end of the cavity 2 is provided with a first limiting member 21 for limiting the position of the elastic member 14; the side wall of the cavity 2 is provided with side leakage holes 23; a detachable leakage plate 22 matching the inner wall of the cavity 2 and a bracket 3 for supporting the detachable leakage plate 22 are disposed inside the cavity 2, and the detachable leakage plate 22 is provided with lower leakage holes 221.

[0054] Based on the large density difference between the ceramic component and the short-cut fiber, when using the existing pressure filtration forming die for short-cut fibers, during the pressure filtration process, due to the low drainage efficiency, the ceramic component is prone to sedimentation and stratification, which is not conducive to improving the high-temperature resistance performance of the fiber skeleton. The present invention provides a pre-rigidification / reinforcement forming die for ultra-lightweight fibrous skeleton materials. By sleeving an elastic component on the pressure filtration rod, the deformation amount of the elastic component can be flexibly adjusted under the cooperation of the pushing component and the first limiting component. Repeated extrusion can be achieved in a short time, maintaining good liquid drainage capacity. In cooperation with the detachable drain plate and the drain holes provided on the side wall of the cavity, multi-faceted liquid drainage can be realized, with high liquid drainage efficiency. Without damaging the fiber structure and distribution, the excess liquid in the fiber skeleton can be drained out in a short time, which is conducive to controlling the content of ceramic additives, ensuring more stable interlayer bonding of the sample, and effectively improving the problems of low liquid drainage efficiency caused by single-sided liquid drainage and easy delamination damage of the sample in the thickness direction. At the same time, it can effectively prevent the sedimentation and stratification of ceramic additives during the pressure filtration process, which affects the performance of the porous short-cut fiber skeleton. By sleeving an elastic component on the pressure filtration rod, the position of the pressing head during the forming process can be flexibly adjusted under the cooperation of the pushing component and the first limiting component. In cooperation with the detachable drain plate, the thickness of the sample can be flexibly adjusted to obtain a wet blank of a short-cut fiber skeleton with stable and controllable thickness, pre-enhancing the strength and stiffness of the skeleton, and effectively avoiding the problem that the sample after pressure filtration by the existing short-cut fiber pressure filtration forming die is prone to rebound in the thickness direction after demolding, forming a loose structure, and further preparing a short-cut fiber composite material with excellent mechanical properties and thermal properties.

[0055] The pre-rigidification / reinforcement forming die for ultra-lightweight fibrous skeleton materials provided by the present invention is flexible, simple in operation, high in liquid drainage efficiency, and good in forming stability. A wet blank of a porous short-cut fiber skeleton with stable and controllable thickness can be obtained, and further a short-cut fiber composite material with excellent mechanical properties and heat insulation and heat prevention properties can be prepared.

[0056] According to some preferred embodiments, the die further includes a second limiting component 24 that cooperates with the side leak hole 23 and is used to limit the position of the pressing head 11. By setting the second limiting component in the present invention to limit the position of the pressing head, the extrusion amount of the pressing head during the extrusion process can be controlled.

[0057] According to some preferred embodiments, the die further includes a fixing structure for fixing the pressing head 11.

[0058] According to some preferred embodiments, the fixing structure includes a fixing groove 111 provided on the side of the pressing head and a fixing component 25 that cooperates with the fixing groove 111.

[0059] During the pressure filtration process of the present invention, if pressure holding is required, the position of the pressing head can be restricted by the second limiting component, and the fixing component is passed through the side leakage hole and matched with the fixing groove to realize the limiting and fixing of the pressing head, thereby achieving the purpose of pressure holding. In addition, when the position of the detachable leakage plate is fixed, the thickness of the formed sample can also be flexibly adjusted by controlling the positions of the fixing component and the second limiting component.

[0060] According to some preferred embodiments, the fixing component 25 passes through the side leakage hole 23 and is connected to the fixing groove 111 to achieve the purpose of fixing the pressing head.

[0061] According to some preferred embodiments, the mold further includes a third limiting component 26 that cooperates with the side leakage hole 23 and is used to limit the positions of the lower end of the detachable leakage plate 22 and the top end of the support 3.

[0062] By setting the third limiting component to limit the position of the lower end of the detachable leakage plate, the present invention can cooperate with the position of the pressing head to adjust the thickness of the formed sample. At the same time, it can also limit the position of the top end of the support, so that there is a gap between the lower end of the detachable leakage plate and the top end of the support to ensure smooth drainage. This not only facilitates adjusting the height of the sample bottom from the ground, but also improves the supporting force and stability of the detachable leakage plate, ensuring smooth drainage of the detachable leakage plate.

[0063] Under the combined action of the second limiting component 24, the fixing component 25, and the third limiting component 26 of the present invention, the thickness of the sample can be flexibly adjusted, the good drainage capacity of the liquid leakage hole can be maintained, and finally a porous short-cut fiber skeleton green blank with stable and controllable thickness can be obtained.

[0064] According to some preferred embodiments, the support 3 is an I-shaped support.

[0065] The cavity of the present invention is sleeved with the support (the size of the cavity matches the size of the support). It should be noted that the present invention does not specifically limit the shape and size of the cavity, which can be adjusted according to actual needs, as long as the inner cross-sectional shape and size of the cavity are the same as the cross-section and size of the support. For example, if the cavity is in the shape of a hollow cylinder, the inner diameter of the cavity is the same as the outer diameter of the support, and so on for other shapes. By sleeving the cavity with the support, the present invention can select supports with different heights according to the distance between the detachable leakage plate in the cavity and the ground.

[0066] According to some preferred embodiments, the support 3 is provided with a liquid leakage hole 31 that communicates with the lower leakage hole 221. By providing the liquid leakage hole on the support, the present invention ensures the smooth discharge of the liquid leaking from the detachable leakage plate and improves the drainage efficiency.

[0067] According to some preferred embodiments, a drain hole 27 communicating with the liquid leakage hole 31 is provided at a position near the bottom end of the side wall of the cavity 2. In the present invention, the drain hole is provided at a position near the bottom end of the side wall of the cavity, which not only facilitates the discharge of liquid, but also the liquid discharge condition through the drain hole can reflect the state of the fiber slurry inside the cavity.

[0068] According to some preferred embodiments, a nylon mesh is laid on the upper surface of the detachable leak plate 22. Laying the nylon mesh can prevent relatively fine components from leaking down.

[0069] To more clearly illustrate the technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with embodiments.

[0070] Embodiment 1

[0071] As Figures 1-5 shown, a pre-rigidification / reinforcement forming mold for an ultra-lightweight fibrous skeleton material includes a press head assembly 1 and a cavity 2;

[0072] The press head assembly 1 includes a press head 11 disposed inside the cavity 2, a filter press rod 12 penetrating through the top end of the cavity 2 and connected to the press head 11, and an elastic member 14 sleeved on the filter press rod 12; one end of the filter press rod 12 is connected to the press head 11, and the other end is provided with a pushing member 13 for controlling the movement of the press head 11;

[0073] The top end of the cavity 2 is a detachable structure, and the bottom end is an open design; the top end of the cavity 2 is provided with a first limiting member 21 for limiting the position of the elastic member 14; the side wall of the cavity 2 is provided with a side leakage hole 23;

[0074] The inside of the cavity 2 is provided with a detachable leak plate 22 matching the inner wall of the cavity 2 and a bracket 3 for supporting the detachable leak plate 22; the detachable leak plate 22 is provided with a downward leakage hole 221; a nylon mesh is laid on the upper surface of the detachable leak plate 22;

[0075] The second limiting member 24 cooperates with the side leakage hole 23 to limit the position of the press head 11; the press head 11 is provided with a fixing groove 111 matching the fixing member 25, and the fixing member 25 passes through the side leakage hole 23 and is connected to the fixing groove 111 to fix the press head 11.

[0076] The third limiting member 26 cooperates with the side leakage hole 23 to limit the positions of the top ends of the detachable leak plate 22 and the bracket 3; the bracket is an I-shaped bracket; the bracket 3 is provided with a liquid leakage hole 31 communicating with the downward leakage hole 221; a drain hole 27 communicating with the liquid leakage hole 31 is provided at a position near the bottom end of the side wall of the cavity 2.

[0077] Comparative Example 1

[0078] As Figure 6As shown in the figure, a forming mold for a fibrous skeleton material includes: a pressing head assembly 1 and a cavity 2;

[0079] The pressing head assembly 1 includes a pressing head 11 disposed inside the cavity 2 and a pressure filter rod 12 penetrating the top end of the cavity 2 and connected to the pressing head 11. One end of the pressure filter rod 12 is connected to the pressing head 11, and the other end is provided with a pushing member 13 for controlling the movement of the pressing head 11;

[0080] The top end of the cavity 2 is a detachable structure, and the bottom end is an open design; the top end of the cavity 2 is provided with a first limiting member 21;

[0081] Inside the cavity 2, a detachable filter plate 22 matching the inner wall of the cavity 2 and a bracket 3 for supporting the detachable filter plate 22 are provided; the detachable filter plate 22 is provided with lower leakage holes 221; a nylon mesh is laid on the upper surface of the detachable filter plate 22; the bracket 3 is an I-shaped bracket; the bracket 3 is provided with liquid leakage holes 31 communicating with the lower leakage holes 221; a liquid discharge hole 27 communicating with the liquid leakage holes 31 is provided at a position near the bottom end of the side wall of the cavity 2.

[0082] Comparative Example 2

[0083] As Figure 7 shown in the figure, a forming mold for a fibrous skeleton material includes a pressing head assembly 1 and a cavity 2; the pressing head assembly 1 includes a pressing head 11 disposed inside the cavity 2 and a pressure filter rod 12 penetrating the top end of the cavity 2 and connected to the pressing head 11; one end of the pressure filter rod 12 is connected to the pressing head 11, and the other end is provided with a pushing member 13 for controlling the movement of the pressing head 11;

[0084] The top end of the cavity 2 is a detachable structure, and the bottom end is an open design; the top end of the cavity 2 is provided with a first limiting member 21; side leakage holes 23 are provided on the side wall of the cavity 2;

[0085] Inside the cavity 2, a detachable filter plate 22 matching the inner wall of the cavity 2 and a bracket 3 for supporting the detachable filter plate 22 are provided; the detachable filter plate 22 is provided with lower leakage holes 221; a nylon mesh is laid on the upper surface of the detachable filter plate; the bracket 3 is an I-shaped bracket; the bracket 3 is provided with liquid leakage holes 31 communicating with the lower leakage holes 221; a liquid discharge hole 27 communicating with the liquid leakage holes 31 is provided at a position near the bottom end of the side wall of the cavity 2.

[0086] It should be noted that the same reference numerals in the mold diagrams corresponding to Embodiment 1, Comparative Example 1, and Comparative Example 2 represent the same components.

[0087] Macrographs of the short-cut fiber skeleton samples (not polished) obtained by pressing the same amount of the same slurry (the slurry components include chopped alumina fibers, zirconium boride powder, silicon oxide fibers, binder, and dispersant) through the forming molds of Embodiment 1, Comparative Example 1, and Comparative Example 2 and then drying, as Figure 8As shown, it can be seen that the pre - stiffening / strengthening forming die for the ultra - light fiberized skeleton material in Example 1 has elastic components, enabling multiple extrusion and drainage. The extrusion speed and the moving distance of the pressing head are controllable. By relying on multiple medium - strength extrusion for drainage, and with leakage holes provided on both the lower leakage plate and the side wall, the liquid drainage efficiency can be improved. The wet blank obtained by pressing the slurry is dried to obtain a short - cut fiber skeleton sample with precise dimensions, stable and controllable thickness, not easily deformed, uniform thickness, compact sample, and flat surface. The size of the short - cut fiber skeleton sample is 80mm×80mm×20mm. The forming die for the fiberized skeleton material in Comparative Example 1 does not have elastic components. The extrusion speed and the moving distance of the pressing head are uncontrollable, and repeated extrusion and drainage cannot be achieved. It relies on a single strong - pressure extrusion, with drainage through the lower leakage plate, and the cavity needs to be lifted upward to remove accumulated water, resulting in low efficiency, difficult thickness control, and easy extrusion deformation. The short - cut fiber skeleton sample obtained by drying the wet blank obtained by pressing the slurry has uneven thickness, loose sample, and uneven surface. The forming die for the fiberized skeleton material in Comparative Example 2 does not have elastic components. The extrusion speed and the moving distance of the pressing head are uncontrollable. It relies on a single medium - strength pressure drainage, with difficult thickness control and easy extrusion deformation. The short - cut fiber skeleton sample obtained by drying the wet blank obtained by pressing the slurry has uneven thickness and uneven surface.

[0088] The present invention also uses the pre - stiffening / strengthening forming die for the ultra - light fiberized skeleton material in Example 1 to prepare multiple short - cut fiber skeleton samples with a size of 80mm×80mm×10mm by drying the wet blanks obtained by pressing the same slurry. The macroscopic pictures (with the surface and edges simply polished) are as Figures 9-11 shown. Multiple samples have uniform, controllable, and highly stable thickness, compact samples, and flat sample surfaces. From the external surface view and internal cross - section view of the samples, it can be seen that the ceramic powder and fibers are evenly distributed in the length, width, and thickness directions without being affected by liquid drainage. As Figure 12 shown, alumina fibers represented by aluminum (Al), silica fibers represented by silicon (Si), silica spheres, and zirconium boride powder represented by zirconium (Zr) all show micron - level uniform distribution. Among them, the zirconium boride powder is evenly distributed in the alumina fibers and silica fibers, further proving from a microscopic perspective that the pressure - filtration die provided by the present invention has high dehydration efficiency during the pressure - filtration process, with uniform distribution and less loss of ceramic powder.

[0089] In summary, the pre - stiffening / strengthening forming die for the ultra - light fiberized skeleton material provided by the present invention can effectively prevent the sedimentation and stratification of ceramic - type additives in the slurry during the pressure - filtration process, obtaining a short - cut fiber skeleton with stable and controllable thickness, not easily deformed, uniform thickness, compact sample, and flat surface, which is suitable for the preparation of short - cut fiber skeletons with different thicknesses.

[0090] In addition, the short-cut fiber skeleton obtained after pressure filtration and drying of the slurry using the super-lightweight fibrous skeleton material pre-stiffening / reinforcing forming die of the present invention can be cured and carbonized to obtain a porous short-cut fiber skeleton with high-temperature resistance and heat insulation performance. This porous short-cut fiber skeleton can be compounded with ceramic aerogel or a ceramic coating can be compounded on its surface to prepare a heat insulation short-cut fiber composite material, which is applied to military, national defense, aviation, aerospace and other fields.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-rigidification / strengthening molding die for ultra-light fiberized skeleton materials, characterized in that: The mold includes a pressing head assembly and a cavity; The pressure head assembly comprises a pressure head arranged inside the cavity, a filter press rod penetrating the top of the cavity and connected to the pressure head, and an elastic component sleeved on the filter press rod; One end of the filter press rod is connected to the pressure head, and the other end is provided with a pushing component for controlling the movement of the pressure head; The top of the cavity is a detachable structure, and the bottom is an open design; the top of the cavity is provided with a first limiting component for limiting the position of the elastic component; The side wall of the cavity is provided with a side leakage hole; the interior of the cavity is provided with a detachable leakage plate matching the inner wall of the cavity and a bracket for supporting the detachable leakage plate; the detachable leakage plate is provided with a lower leakage hole.

2. The mold according to claim 1, characterized in that: The mold further comprises a second limiting component which cooperates with the side leakage hole and is used for limiting the position of the pressure head.

3. The mold according to claim 1, characterized in that: The mold further comprises a fixing structure for fixing the pressing head.

4. The mold according to claim 3, characterized in that: The fixing structure comprises a fixing groove arranged on the side of the pressure head and a fixing component matched with the fixing groove.

5. The mold according to claim 4, characterized in that: The fixing component passes through the side leakage hole and is connected with the fixing groove.

6. The mold according to claim 1, characterized in that: The mold further comprises a third limiting component which cooperates with the side leakage hole and is used to limit the position of the lower end of the detachable leakage plate and the top end of the bracket.

7. The mold according to claim 1, characterized in that: The bracket is an I-shaped bracket.

8. The mold according to claim 1, characterized in that: The bracket is provided with a liquid leakage hole communicated with the lower leakage hole.

9. The mold according to claim 8, characterized in that: A liquid discharge hole connected to the liquid leakage hole is arranged on the side wall of the cavity near the bottom end.

10. The mold according to claim 1, characterized in that: The upper surface of the detachable drain plate is paved with nylon mesh.

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