Invisible composite board, preparation mold and preparation method thereof

Abstract

The application discloses a stealth composite board and a preparation mold and a preparation method thereof, wherein the stealth composite board comprises a stealth layer, a reflection layer and a heat preservation layer which are stacked in sequence from top to bottom; the stealth layer is provided with upper through holes in an array distribution, the reflection layer is provided with middle through holes in cooperation, the heat preservation layer is provided with lower through holes in cooperation, each upper through hole, middle through hole and lower through hole are in one-to-one correspondence and are connected in sequence and are in alignment and communication in sequence, forming connecting through holes; after the stealth layer, the reflection layer and the heat preservation layer are stacked together, the stealth layer, the reflection layer and the heat preservation layer are wrapped by using a quartz fiber cloth to form an integral whole; the connecting through holes are divided into wire passing through holes and glue injection through holes; the wire passing through holes are provided with quartz yarns which pass through the wire passing through holes; the glue injection through holes are used for glue injection to form glue columns. The application adopts the punching and wire threading method, increases the adhesion between the stealth layer and the skin, and the glue columns can be formed in the through holes in the forming process, the adhesion strength of the stealth composite board is increased, and the adhesion strength of the stealth composite board is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of stealth composite panels used in modular shelters, specifically to a stealth composite panel and its preparation mold and preparation method. Background Technology

[0002] The stealth composite panels used in existing modular shelters are prone to delamination or skin bulging and cracking during use after molding, and also suffer from insufficient edge straightness and surface flatness. Furthermore, the conventional stealth composite panel molding process is inefficient, making it impossible to manufacture multiple panels at once.

[0003] Therefore, the applicant proposes a new stealth composite plate, which optimizes the stealth plate structure, designs a matching preparation mold, and manufactures it using a matching preparation method. Summary of the Invention

[0004] In order to solve the problems in the prior art, the present invention provides a stealth composite plate, its preparation mold and preparation method.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A stealth composite panel includes a stealth layer, a reflective layer, and an insulation layer stacked from top to bottom;

[0007] The stealth layer has several vertically penetrating upper through holes arranged in an array, the reflective layer has several vertically penetrating middle through holes arranged in an array, and the insulation layer has several vertically penetrating lower through holes arranged in an array. Each upper through hole, middle through hole, and lower through hole corresponds to another and is aligned and connected vertically to form a connecting through hole.

[0008] After the stealth layer, reflective layer, and insulation layer are stacked together, they are wrapped with quartz fiber cloth to form a whole; openings are provided on the upper and lower sides of the quartz fiber cloth at the corresponding positions of each connecting through hole;

[0009] The connection through holes are divided into wire through holes and glue injection through holes; quartz yarn passes through the wire through holes to fix the stealth layer, reflective layer and thermal insulation layer from the top and bottom; glue injection through holes are used to inject glue to form glue columns.

[0010] Furthermore, the stealth layer is composed of a first stealth layer, a second stealth layer... and an Nth stealth layer arranged periodically from top to bottom and bonded together; the first stealth layer, the second stealth layer... and the Nth stealth layer are different stealth materials, and N is greater than or equal to two.

[0011] Furthermore, among the connecting through holes, the connecting through holes located at the perimeter serve as wire through holes, while the remaining connecting through holes serve as glue injection through holes.

[0012] Furthermore, the sealing position of the quartz fiber cloth is located at the bottom of the insulation layer. A sealing layer is laid at the bottom of the insulation layer to seal the quartz fiber cloth; the sealing layer has an opening at the position corresponding to the connecting through hole.

[0013] Furthermore, the reflective layer is made of carbon fiber skin; the insulation layer is made of polyurethane foam; and the sealing layer is made of carbon fiber skin.

[0014] The present invention also discloses a preparation mold for a stealth composite plate, the preparation mold comprising a mold upper cover, a mold middle box and a mold lower cover, the mold upper cover, the mold middle box and the mold lower cover being detachably assembled;

[0015] The upper and lower sides of the mold box are provided with grooves, which are respectively fitted with the bosses of the upper and lower mold covers; multiple forming cavities are arranged in the middle of the mold box, with the upper and lower openings of the forming cavities and their shapes are adapted to the aforementioned stealth composite plate; on the side that mates with the upper mold cover, a guide groove is provided between two adjacent forming cavities, and the two ends of the guide groove are respectively connected to the two forming cavities; on the side that mates with the lower mold cover, a notch is provided on the outer edge of each forming cavity as an outlet groove;

[0016] The inner center of the mold cover has a boss that fits into the upper groove of the mold box; the mold cover also has an inlet guide hole; the position of the inlet guide hole corresponds to and is connected to the guide groove.

[0017] The inner center of the mold lower cover is provided with a boss, which fits into the lower groove of the mold box; the mold lower cover is also provided with an outlet guide hole, the position of which corresponds to and is connected to the outlet groove.

[0018] Furthermore, bolt mounting holes are provided around the top cover, middle box, and bottom cover of the mold for bolt through-hole connection, thereby achieving connection and fixation with the top cover, middle box, and bottom cover of the mold.

[0019] Furthermore, the forming cavity is a square hole manufactured using a wire cutting process.

[0020] Furthermore, the middle part of the guide groove is enlarged to correspond to and communicate with the guide hole on the mold cover.

[0021] This invention also discloses a method for preparing a stealth composite plate, comprising the following steps:

[0022] (1) Prepare the preparation mold and the stealth composite plate;

[0023] (2) Place the stealth composite board into each molding cavity of the mold box, with the quartz fiber cloth facing upward;

[0024] (3) Assemble and fix the upper cover of the mold, the middle box of the mold and the lower cover of the mold, and connect the inlet pipe to the inlet guide hole of the upper cover of the mold and the outlet pipe to the outlet guide hole of the lower cover of the mold.

[0025] (4) The molding process is carried out using a vacuum adsorption-assisted potting process;

[0026] Air is extracted from the mold using a vacuum press, creating a pressure difference with the external atmospheric pressure. This pressure difference forces resin into the mold through an inlet pipe, which then guides the resin to both sides into the molding cavity via a flow channel. The resin completely impregnates the stealth composite panel and is then discharged through an outlet channel and outlet pipe. During the molding process, glue columns form within the injection holes of the stealth composite panel, increasing the adhesion between the stealth layer and the skin. Quartz yarn passing through the wire through-holes, in conjunction with the glue injection, tightly connects the stealth composite panel.

[0027] The beneficial effects of this invention are:

[0028] This invention analyzes the structure of the stealth composite panel, optimizes and improves the molding process, and redesigns the molding mold of the stealth composite panel to create a mold that can simultaneously form multiple composite panels, thereby improving the molding efficiency of the stealth panel.

[0029] Analysis of issues such as delamination, bulging, and cracking that occur during the use of conventional stealth composite panels reveals that insufficient adhesion is the primary cause. Therefore, in the structural design of this stealth composite panel, a perforation and threading method is employed. Through-holes are drilled in both the stealth panel and the foam board, and quartz cloth is used to completely wrap both the stealth panel and the foam board. Quartz yarn is then threaded through the through-holes to connect the quartz fiber cloth, the stealth panel, and the foam board together, forming a single unit. This unit is then placed in a mold and molded using a vacuum adsorption-assisted glue-pouring process, increasing the adhesion between the stealth layer and the skin. Furthermore, during the molding process, glue columns can form within the through-holes, while the perforated quartz yarn tightly connects the stealth composite panel, significantly increasing its adhesive strength. This greatly enhances the adhesive strength of the stealth composite panel, enabling its use in the product. Simultaneously, the mold ensures the flatness of the stealth composite panel surface and the straightness of its edges. Attached Figure Description

[0030] Figure 1 This is a diagram showing the internal structure of the stealth composite panel in Example 1;

[0031] Figure 2 This is a schematic diagram of the overall shape of the stealth composite panel in Example 1;

[0032] Figure 3 This is a schematic diagram of the stealth layer structure in Example 1;

[0033] Figure 4 This is a schematic diagram of the insulation layer structure in Example 1;

[0034] Figure 5 This is a schematic diagram of the mold cover in Example 2;

[0035] Figure 6 This is a front view of the box in the mold in Example 2;

[0036] Figure 7 This is a schematic diagram of the back of the box in the mold in Example 2;

[0037] Figure 8 This is a schematic diagram of the lower cover of the mold in Example 2;

[0038] Figure 9 This is a schematic diagram of the mold assembly used in Example 2;

[0039] Figure 10 This is a schematic diagram of the stealth composite plate being formed in the preparation mold in Example 3.

[0040] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0042] Example 1:

[0043] like Figures 1 to 4 As shown, this embodiment provides a stealth composite panel, which includes a stealth layer, a reflective layer 2 and a thermal insulation layer 3 stacked from top to bottom.

[0044] The stealth layer 1 is composed of a first stealth layer 11 and a second stealth layer 12, which are periodically arranged vertically and bonded together. The first and second stealth layers are made of different stealth materials. Depending on the functional requirements, other combinations and arrangements of the stealth layers may also be used.

[0045] The stealth layer 1 has several vertical through holes 13 arranged in an array at a certain interval, with a diameter of 2mm.

[0046] A carbon fiber skin is laid at the bottom of the stealth layer 1, serving as the reflective layer 2 of the stealth layer. Several through holes with a diameter of 2mm are arranged in an array on the reflective layer 2.

[0047] The insulation layer 3 is made of polyurethane foam. Several through holes 33 are arranged in an array at certain intervals, and the diameter of the through holes is 2mm.

[0048] The aforementioned upper through hole 13, middle through hole and lower through hole 33 correspond one-to-one and are aligned and connected vertically to form a connecting through hole.

[0049] After the stealth layer 1, reflective layer 2, and insulation layer 3 are stacked together, they are wrapped together with quartz fiber cloth 4 to form a whole. The upper side of the quartz fiber cloth 4 has openings corresponding to the connecting through holes. The sealing position of the quartz fiber cloth 4 is located at the bottom of the insulation layer 3. A sealing layer 5 is laid at the bottom of the insulation layer 3 to seal the quartz fiber cloth 4. The sealing layer 5 is made of carbon fiber skin, and the sealing layer 5 has openings corresponding to the connecting through holes.

[0050] The connection through holes are divided into wire-passing through holes and glue-injection through holes. Quartz yarn 30 passes through the wire-passing through holes to fix the stealth layer 1, reflective layer 2 and thermal insulation layer 3 through the top and bottom. The glue-injection through holes are used to inject glue to form glue columns.

[0051] In this embodiment, the connecting through holes located at the perimeter serve as wiring through holes, while the remaining connecting through holes serve as adhesive injection through holes. In other embodiments, the allocation of wiring through holes and adhesive injection through holes can be adapted to the strength requirements of the stealth composite panel.

[0052] Example 2:

[0053] like Figure 9 As shown, this embodiment provides a mold for preparing a stealth composite panel. The mold is made of stainless steel and mainly consists of three parts: an upper mold cover 6, a middle mold box 7, and a lower mold cover 8. All three parts are machined as one piece. During use, the upper mold cover, the middle mold box, and the lower mold cover are positioned by a stop to achieve the installation and fit between the three parts. The fit is reinforced by installing bolts around the mold.

[0054] like Figure 5 As shown, the mold upper cover 6 has a boss structure. A boss 62 is designed in the middle of the inner side of the mold upper cover 6, which fits with the mold middle box 7 to achieve the installation fit between the mold upper cover 6 and the mold middle box 7. At the same time, four inlet guide holes 61 are opened in the middle of the mold upper cover 6 for installing inlet tubes. The position and number of inlet guide holes 61 correspond one-to-one with the guide grooves 72 on the mold middle box 7. Bolt mounting holes are also opened around the mold upper cover 6 for bolt connection, realizing the bolt connection between it and the mold middle box 7 and the mold lower cover 8.

[0055] like Figure 6 and Figure 7As shown, the upper and lower sides of the mold box 7 are provided with grooves 70, which respectively fit with the bosses of the upper mold cover 6 and the lower mold cover 8. Eight square holes are made in the middle of the mold box 7 using wire cutting technology. The top and bottom of the square holes are open. Wire cutting can ensure the edges and corners of the square holes. The square holes serve as the forming cavity 71, and their shape is adapted to the stealth composite plate of Embodiment 1.

[0056] On one side of the surface that mates with the mold cover 6, a guide groove 72 is provided between two adjacent molding cavities 71. The two ends of the guide groove 72 are connected to the two molding cavities 71 respectively. The middle part of the guide groove 72 is enlarged and corresponds to and connects with the inlet guide hole 61 of the mold cover, so as to realize the guiding function between the mold box 7 and the mold cover 6.

[0057] On one side of the surface that mates with the lower mold cover 8, notches are provided along the outer edges of the eight square holes to serve as outlet grooves 73. The outlet grooves 73 correspond vertically to and are connected with the outlet guide holes 81 designed on the lower mold cover 8, enabling the flow guidance between the inner mold box 7 and the lower mold cover 8.

[0058] Bolt mounting holes are made around the box 7 in the mold for bolt connection, so as to realize the bolt connection between the box 7 and the upper cover 6 and the lower cover 8 of the mold.

[0059] like Figure 8 As shown, the lower mold cover 8 has a boss structure. A boss 82 is designed in the middle of the inner side of the lower mold cover 8, which fits with the middle mold box 7 to achieve the installation fit between the lower mold cover 8 and the middle mold box 7. At the same time, eight through holes are provided in the middle of the lower mold cover 8 as outlet guide holes 81. The outlet guide holes 81 correspond vertically with and are connected to the outlet grooves 73 on the outer edge of the eight square holes in the middle mold box 7. Bolt mounting holes are also provided around the periphery of the lower mold cover 8 for bolt connection to achieve connection and fixation with the upper mold cover 6 and the middle mold box 7.

[0060] The upper cover 6, the middle box 7, and the lower cover 8 of the mold are each equipped with a handle 9 for easy operation.

[0061] Example 3:

[0062] This embodiment discloses a method for preparing a stealth composite plate, including the following steps:

[0063] (1) Prepare the preparation mold described in Example 2 and the stealth composite plate 10 described in Example 1.

[0064] (2) Place the stealth composite panel 10 into each molding cavity 71 of the mold box 7, with the quartz fiber cloth side facing upwards, such as... Figure 10 As shown.

[0065] (3) Assemble and fix the upper cover 6, the middle box 7 and the lower cover 8 of the mold, and connect the inlet pipe to the inlet guide hole 61 of the upper cover 6 of the mold, and connect the outlet pipe to the outlet guide hole 81 of the lower cover 8 of the mold.

[0066] (4) The molding process is carried out using vacuum adsorption-assisted potting.

[0067] Air is extracted from the mold using a vacuum press, creating a pressure difference with the external atmospheric pressure. This pressure difference forces resin into the mold through an inlet pipe, and the resin is then guided to both sides of the molding cavity 71 via a flow channel 72. The resin completely impregnates the stealth composite plate 10 and is then discharged through an outlet channel and outlet pipe. During the molding process, resin columns form within the injection holes of the stealth composite plate, increasing the adhesion between the stealth layer and the skin. Simultaneously, quartz yarn passing through the wire through-holes, in conjunction with the resin injection, tightly connects the stealth composite plate, further increasing its adhesive strength. This significantly enhances the adhesive strength of the stealth composite plate, enabling its use in the final product. Furthermore, the mold ensures the flatness of the stealth composite plate surface and the straightness of its edges.

[0068] This invention analyzes the structure of the stealth composite panel, optimizes and improves the molding process, and redesigns the molding mold of the stealth composite panel to create a mold that can simultaneously form multiple composite panels, thereby improving the molding efficiency of the stealth panel.

[0069] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0070] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0071] 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A stealth composite panel, characterized in that: It includes a stealth layer, a reflective layer, and an insulation layer stacked from top to bottom; The stealth layer has several vertically penetrating upper through holes arranged in an array, the reflective layer has several vertically penetrating middle through holes arranged in an array, and the insulation layer has several vertically penetrating lower through holes arranged in an array. Each upper through hole, middle through hole, and lower through hole corresponds to another and is aligned and connected vertically to form a connecting through hole. After the stealth layer, reflective layer, and insulation layer are stacked together, they are wrapped with quartz fiber cloth to form a whole; openings are provided on the upper and lower sides of the quartz fiber cloth at the corresponding positions of each connecting through hole; The sealing position of the quartz fiber cloth is located at the bottom of the insulation layer. A sealing layer is laid at the bottom of the insulation layer to seal the quartz fiber cloth. The sealing layer has openings at positions corresponding to the connecting through holes. The sealing layer is made of carbon fiber skin. The connection through holes are divided into wire through holes and glue injection through holes; quartz yarn passes through the wire through holes to fix the stealth layer, reflective layer and thermal insulation layer from the top and bottom; glue injection through holes are used to inject glue to form glue columns.

2. The stealth composite panel according to claim 1, characterized in that: The stealth layer is composed of a first stealth layer, a second stealth layer, ..., an Nth stealth layer, which are arranged vertically and bonded together in a periodic manner; the first stealth layer, the second stealth layer, ..., the Nth stealth layer are different stealth materials, and N is greater than or equal to two.

3. The stealth composite panel according to claim 1, characterized in that: Of the connecting through holes, the connecting through holes located at the perimeter serve as wire through holes, while the remaining connecting through holes serve as glue injection through holes.

4. The stealth composite panel according to claim 1, characterized in that: The reflective layer is made of carbon fiber skin; the insulation layer is made of polyurethane foam.

5. A mold for preparing a stealth composite panel, characterized in that: The preparation mold includes a mold upper cover, a mold middle box, and a mold lower cover, which are detachably assembled. The upper and lower sides of the mold box are provided with grooves, which are respectively fitted with the bosses of the upper and lower mold covers; multiple forming cavities are arranged in the middle of the mold box, the forming cavities are open at the top and bottom, and their shapes are adapted to the stealth composite plate described in any one of claims 1-4; on the side that mates with the upper mold cover, a guide groove is provided between two adjacent forming cavities, and the two ends of the guide groove are respectively connected to the two forming cavities; on the side that mates with the lower mold cover, a notch is provided on the outer edge of each forming cavity as an outlet groove; The inner center of the mold cover has a boss that fits into the upper groove of the mold box; the mold cover also has an inlet guide hole; the position of the inlet guide hole corresponds to and is connected to the guide groove. The inner center of the mold lower cover is provided with a boss, which fits into the lower groove of the mold box; the mold lower cover is also provided with an outlet guide hole, the position of which corresponds to and is connected to the outlet groove.

6. The mold for preparing the stealth composite plate according to claim 5, characterized in that: Bolt mounting holes are provided around the top cover, middle box, and bottom cover of the mold for bolt through-hole connection, thereby achieving connection and fixation with the top cover, middle box, and bottom cover of the mold.

7. The mold for preparing the stealth composite plate according to claim 5, characterized in that: The forming cavity is a square hole made using a wire cutting process.

8. The mold for preparing the stealth composite plate according to claim 5, characterized in that: The middle part of the guide groove is enlarged to correspond to and communicate with the guide hole on the mold cover.

9. A method for preparing a stealth composite panel, characterized in that... Includes the following steps: (1) Prepare the preparation mold according to any one of claims 5-8, and the stealth composite plate according to any one of claims 1-4; (2) Place the stealth composite board into each molding cavity of the mold box, with the quartz fiber cloth facing upward; (3) Assemble and fix the upper cover of the mold, the middle box of the mold and the lower cover of the mold, and connect the inlet pipe to the inlet guide hole of the upper cover of the mold and the outlet pipe to the outlet guide hole of the lower cover of the mold. (4) The molding process is carried out using a vacuum adsorption-assisted potting process; Air is extracted from the mold using a vacuum press, creating a pressure difference with the external atmospheric pressure. This pressure difference forces resin into the mold through an inlet pipe, which then guides the resin to both sides into the molding cavity via a flow channel. The resin completely impregnates the stealth composite panel and is then discharged through an outlet channel and outlet pipe. During the molding process, glue columns form within the injection holes of the stealth composite panel, increasing the adhesion between the stealth layer and the skin. Quartz yarn passing through the wire through-holes, in conjunction with the glue injection, tightly connects the stealth composite panel.

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