Invisible composite board as well as preparation mold and preparation method thereof

Abstract

The invention discloses a stealth composite board and a preparation mold and method thereof. The stealth composite board comprises a stealth layer, a reflecting layer and a heat preservation layer which are sequentially stacked from top to bottom. Upper through holes are distributed in the invisible layer in an array mode, middle through holes are formed in the reflecting layer in a matched mode, lower through holes are formed in the heat preservation layer in a matched mode, and the upper through holes, the middle through holes and the lower through holes are in one-to-one correspondence and are vertically aligned and communicated to form connecting through holes; after the stealth layer, the reflecting layer and the heat preservation layer are stacked together, quartz fiber cloth is adopted to wrap the stealth layer, the reflecting layer and the heat preservation layer to form a whole. The connecting through holes are divided into wire passing through holes and glue injection through holes; a quartz yarn passes through the wire passing through hole; and the glue injection through holes are used for filling glue to form glue columns. According to the stealth composite board, the method of punching and threading is adopted, the bonding force between the stealth layer and the skin is increased, the rubber columns can be formed in the through holes in the forming process, the bonding strength of the stealth composite board is increased, and the bonding strength of the stealth composite board is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of stealth composite panels used in shelters, and in particular to a stealth composite panel and a preparation mold and a preparation method thereof. Background Art

[0002] The stealth composite panels used in existing shelters are prone to delamination or skin bulging and cracking during use after molding, and there are problems such as insufficient edge straightness and insufficient surface flatness. At the same time, the production efficiency of conventional stealth composite panels is low during the molding process, and it is impossible to mold and manufacture multiple stealth composite panels.

[0003] Therefore, the applicant proposed a new stealth composite panel, optimized the stealth panel structure, designed a matching preparation mold, and manufactured it through 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 and a preparation mold and a preparation method thereof.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A stealth composite panel comprises a stealth layer, a reflection layer and a heat preservation layer stacked in sequence from top to bottom; The stealth layer is provided with a plurality of upper through holes penetrating in the vertical direction in an array distribution, the reflective layer is provided with a plurality of middle through holes penetrating in the vertical direction in an array distribution, and the thermal insulation layer is provided with a plurality of lower through holes penetrating in the vertical direction in an array distribution, and each of the upper through holes, the middle through holes and the lower through holes corresponds to each other and is aligned and connected up and down to form a connecting through hole; After the stealth layer, the reflective layer and the thermal insulation layer are stacked together, the stealth layer, the reflective layer and the thermal insulation layer are wrapped with quartz fiber cloth to form a whole; the upper and lower sides of the quartz fiber cloth are provided with openings at positions corresponding to the connecting through holes; The connecting through holes are divided into wire-passing through holes and glue-injection through holes; quartz yarn passes through the wire-passing through holes to perform vertical perforations and fix the stealth layer, the reflective layer and the thermal insulation layer; the glue-injection through holes are used for injecting glue to form glue columns.

[0006] Furthermore, the stealth layer is composed of a first stealth layer, a second stealth layer ... an Nth stealth layer which are periodically arranged up and down and bonded in sequence; the first stealth layer, the second stealth layer ... an Nth stealth layer are different stealth materials, and N is greater than or equal to two.

[0007] Furthermore, among the connecting through holes, the connecting through holes located at the peripheral positions are used as wire passing through holes, and the remaining connecting through holes are used as glue injection through holes.

[0008] Furthermore, the sealing position of the quartz fiber cloth is located at the bottom of the thermal insulation layer, and a sealing layer is laid at the bottom of the thermal insulation layer to seal the quartz fiber cloth; openings are provided at positions corresponding to the connecting through holes.

[0009] Furthermore, the reflective layer is covered with a carbon fiber skin; the thermal insulation layer is covered with polyurethane foam; and the sealing layer is covered with a carbon fiber skin.

[0010] The present invention also discloses a preparation mold for a stealth composite plate, wherein the preparation mold comprises a mold upper cover, a mold middle box and a mold lower cover, wherein the mold upper cover, the mold middle box and the mold lower cover are detachably assembled; The upper and lower sides of the mold box are provided with grooves, which are respectively matched with the bosses of the mold upper cover and the mold lower cover; a plurality of molding cavities are arranged in the middle position of the mold box, which are open at the top and bottom and have a shape that matches the stealth composite plate; on the side of the matching surface with the mold upper cover, a guide groove is provided between two adjacent molding cavities, and the two ends of the guide groove are respectively connected with the two molding cavities; on the side of the matching surface with the mold lower cover, a notch is provided on the outer edge of each molding cavity as a guide groove; A boss is provided in the middle of the inner side of the mold upper cover, which is engaged with the upper groove of the mold middle box; an inlet guide hole is also provided on the mold upper cover; the position of the inlet guide hole corresponds to and is connected with the guide groove; A boss is provided in the middle of the inner side of the mold lower cover, which cooperates with the lower groove of the mold middle box for stopper; a guide hole is also opened on the mold lower cover, and the position of the guide hole corresponds to and is connected with the guide groove.

[0011] Furthermore, bolt mounting holes are correspondingly opened around the mold upper cover, the mold middle box and the mold lower cover for perforation connection of bolts to achieve connection and fixation between the mold upper cover, the mold middle box and the mold lower cover.

[0012] Furthermore, the molding cavity is a square hole produced by a wire cutting process.

[0013] Furthermore, the middle portion of the guide groove is enlarged to correspond to and communicate with the guide hole of the mold upper cover.

[0014] The present invention also discloses a method for preparing a stealth composite plate, comprising the following steps: (1) Preparing the preparation mold and the stealth composite plate; (2) Place the stealth composite plate into each molding cavity of the mold box with the quartz fiber cloth facing upward; (3) Assemble and fix the mold upper cover, the mold middle box and the mold lower cover, and connect the inlet pipe to the inlet guide hole of the mold upper cover, and connect the outlet pipe to the outlet guide hole of the mold lower cover; (4) Using vacuum adsorption assisted glue filling process for molding; The air in the prepared mold is extracted through a vacuum press, thereby forming a pressure difference with the external atmospheric pressure. The resin is poured into the mold through the inlet tube through the pressure difference, and the resin is guided to both sides into the molding cavity through the guide groove. The resin completely penetrates the stealth composite plate and is guided out through the guide groove and the guide tube. During the molding process, glue columns are formed in the glue injection holes in the stealth composite plate to increase the bonding force between the stealth layer and the skin. The quartz yarn passing through the wire through holes cooperates with the glue injection to tightly connect the stealth composite plates.

[0015] Beneficial effects of the present invention: The present invention analyzes the structure of the stealth composite plate, optimizes and improves the molding process, and redesigns the molding mold of the stealth composite plate to design a mold that can ensure the simultaneous molding of multiple composite plates, thereby improving the stealth plate molding efficiency.

[0016] According to the analysis of the problems of delamination, bulging and cracking that occur during the use of conventional stealth composite panels, it is mainly caused by insufficient bonding force. Therefore, in the structural design of this stealth composite panel, the method of punching and threading is used to punch through holes in the stealth panel and foam panel, and after the stealth panel and foam panel are fully wrapped with quartz cloth, quartz yarn is passed through the through hole, and the quartz fiber cloth, stealth panel and foam panel are all connected together to form a whole, and then placed in the mold, and the vacuum adsorption assisted glue pouring process is used for molding to increase the bonding force between the stealth layer and the skin. In addition, during the molding process, glue columns can be formed in the through holes, and the perforated quartz yarn can tightly connect the stealth composite panels, increase the bonding strength of the stealth composite panels, thereby greatly improving the bonding strength of the stealth composite panels, and can also be used in products simultaneously. At the same time, under the action of the mold, the flatness of the surface of the stealth composite panel and the straightness of the edges are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing the internal structure of the stealth composite plate in Example 1; Figure 2 This is a schematic diagram of the overall appearance of the stealth composite plate in Example 1; Figure 3 Schematic diagram of the structure of the stealth layer in Example 1; Figure 4 It is a schematic structural diagram of the thermal insulation layer in the first embodiment; Figure 5 It is a schematic diagram of the mold cover in the second embodiment; Figure 6 This is a front view of the box in the mold in Example 2; Figure 7 This is a schematic diagram of the back side of the box in the mold in Example 2; Figure 8 It is a schematic diagram of the lower cover of the mold in the second embodiment; Fig. 9 It is a schematic diagram of the assembly of the mold prepared in Example 2; Fig.10 Schematic diagram of the formation of the stealth composite panel in the preparation mold in Example 3.

[0018] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Embodiment 1: like Figures 1 to 4 As shown, this embodiment provides a stealth composite plate, including a stealth layer, a reflective layer 2 and a thermal insulation layer 3 stacked in sequence from top to bottom.

[0021] The stealth layer 1 is composed of a first stealth layer 11 and a second stealth layer 12 which are bonded and compounded in a periodic arrangement up and down; the first stealth layer and the second stealth layer are made of different stealth materials. The stealth layer can also adopt other combinations and arrangements according to the functional requirements.

[0022] The stealth layer 1 is provided with a plurality of upper through holes 13 penetrating in the up-down direction at a certain interval in an array, and the diameter of the upper through hole 13 is 2 mm.

[0023] A carbon fiber skin is laid at the bottom of the stealth layer 1 as the reflective layer 2 of the stealth layer. The reflective layer 2 is provided with a plurality of through holes penetrating in the vertical direction in an array, and the diameter of the through holes is 2 mm.

[0024] The heat-insulating layer 3 is made of polyurethane foam, and a plurality of lower through holes 33 penetrating in the vertical direction are arranged in an array at a certain interval, and the diameter of the lower through holes is 2 mm.

[0025] The upper through holes 13 , the middle through holes and the lower through holes 33 correspond to each other one by one and are aligned and connected up and down to form connecting through holes.

[0026] After the stealth layer 1, the reflective layer 2 and the thermal insulation layer 3 are stacked together, the stealth layer 1, the reflective layer 2 and the thermal insulation layer 3 are wrapped with a quartz fiber cloth 4 to form a whole. The upper side of the quartz fiber cloth 4 is provided with openings at positions corresponding to the connecting through holes, and the sealing position of the quartz fiber cloth 4 is located at the bottom of the thermal insulation layer 3. The sealing layer 5 is laid at the bottom of the thermal insulation layer 3 to seal the quartz fiber cloth 4. The sealing layer 5 is covered with a carbon fiber skin, and the sealing layer 5 is provided with openings at positions corresponding to the connecting through holes.

[0027] The connecting through holes are divided into wire through holes 31 and glue injection through holes 32. Quartz yarn 30 passes through the wire through holes 31 to fix the stealth layer 1, the reflective layer 2 and the thermal insulation layer 3; the glue injection through holes 32 are used to inject glue to form glue columns.

[0028] In this embodiment, the connecting through holes at the four sides are used as the wire through holes 31, and the remaining connecting through holes are used as the glue injection through holes 32. In other embodiments, the distribution relationship between the wire through holes 31 and the glue injection through holes 32 can be adapted according to the strength requirements of the stealth composite plate.

[0029] Embodiment 2: like Fig. 9 As shown, this embodiment provides a preparation mold for a stealth composite panel. The preparation mold is made of stainless steel and is mainly composed of three parts: a mold upper cover 6, a mold middle box 7 and a mold lower cover 8. The three parts are all made by one-piece machining. When in use, the stoppers between the mold upper cover, the mold middle box and the mold lower cover are used to limit the installation and fit of the three parts, and bolts are installed around the mold to achieve reinforcement.

[0030] like Figure 5 As shown, the mold upper cover 6 is a boss structure, and a boss 62 is designed in the middle of the inner side of the mold upper cover 6, which is matched with the mold middle box 7 to achieve the installation and matching 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 the inlet pipe. The position and number of the inlet guide holes 61 correspond to the guide grooves 72 on the mold middle box 7. At the same time, bolt mounting holes are opened around the mold upper cover 6 for bolt connection to achieve bolt connection with the mold middle box 7 and the mold lower cover 8.

[0031] like Figure 6 and Figure 7 As shown, the upper and lower sides of the mold box 7 are set as grooves 70, which are respectively matched with the bosses of the mold upper cover 6 and the mold lower cover 8. Eight square holes are made in the middle position of the mold box 7 by wire cutting technology. The upper and lower sides of the square holes are open. The use of wire cutting can ensure the edges and corners of the square holes. The square holes serve as the molding cavity 71, and the shape is adapted to the stealth composite plate of the first embodiment.

[0032] On the side of the mating surface with the mold upper cover 6, a guide groove 72 is provided between two adjacent molding cavities 71, and the two ends of the guide groove 72 are respectively connected with the two molding cavities 71. The middle part of the guide groove 72 is enlarged, corresponding to and connected with the inlet guide hole 61 of the mold upper cover, so as to realize the guide function between the mold box 7 and the mold upper cover 6.

[0033] On the side of the mating surface with the mold lower cover 8, a notch is set on the outer edge of the eight square holes as a guide groove 73. The guide groove 73 corresponds to and is connected with the guide hole 81 designed on the mold lower cover 8, so as to realize the guide function between the mold box 7 and the mold lower cover 8.

[0034] Bolt mounting holes are provided around the mold box 7 for bolt connection to achieve bolt connection with the mold upper cover 6 and the mold lower cover 8.

[0035] like Figure 8 As shown, the mold lower cover 8 is a boss structure, and a boss 82 is designed in the middle of the inner side of the mold lower cover 8, which is matched with the mold middle box 7 to achieve the installation and matching between the mold lower cover 8 and the mold middle box 7. At the same time, eight through holes are set in the middle of the mold lower cover 8 as outlet guide holes 81. The outlet guide holes 81 correspond to and are connected with the outlet grooves 73 on the outer edges of the eight square holes in the mold middle box 7. At the same time, bolt mounting holes are opened around the mold lower cover 8 for bolt connection to achieve the connection and fixation between the mold upper cover 6 and the mold middle box 7.

[0036] The mold upper cover 6, the mold middle box 7 and the mold lower cover 8 are also provided with handles 9 respectively for easy operation.

[0037] Embodiment three: This embodiment discloses a method for preparing a stealth composite plate, comprising the following steps: (1) Prepare the preparation mold described in Example 2 and the stealth composite plate 10 described in Example 1.

[0038] (2) Place the stealth composite panel 10 into each molding cavity 71 of the mold box 7, with the quartz fiber cloth facing upward. Fig.10 shown.

[0039] (3) Assemble and fix the mold upper cover 6, the mold middle box 7 and the mold lower cover 8, and connect the inlet pipe to the inlet guide hole 61 of the mold upper cover 6, and connect the outlet pipe to the outlet guide hole 81 of the mold lower cover 8.

[0040] (4) Using vacuum adsorption assisted glue filling process for molding; The air in the preparation mold 20 is extracted by a vacuum press, thereby forming a pressure difference with the external atmospheric pressure. The resin is poured into the mold through the inlet pipe through the pressure difference, and the resin is guided to both sides into the molding cavity 71 through the guide groove 72. The resin completely permeates the stealth composite plate 10, and the resin is guided out through the guide groove and the guide pipe. In the molding process, a glue column can be formed in the glue injection through hole in the stealth composite plate to increase the bonding force between the stealth layer and the skin. At the same time, the quartz yarn passing through the through hole cooperates with the glue injection to tightly connect the stealth composite plate, which increases the bonding strength of the stealth composite plate, thereby greatly improving the bonding strength of the stealth composite plate, and can also be used in the product simultaneously. At the same time, under the action of the preparation mold 20, the flatness of the surface of the stealth composite plate and the straightness of the edges are achieved.

[0041] The present invention analyzes the structure of the stealth composite plate, optimizes and improves the molding process, and redesigns the molding mold of the stealth composite plate to design a mold that can ensure the simultaneous molding of multiple composite plates, thereby improving the stealth plate molding efficiency.

[0042] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0043] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A stealth composite panel, characterized in that: It includes a stealth layer, a reflection layer and a heat preservation layer stacked in sequence from top to bottom; The stealth layer is provided with a plurality of upper through holes penetrating in the vertical direction in an array distribution, the reflective layer is provided with a plurality of middle through holes penetrating in the vertical direction in an array distribution, and the thermal insulation layer is provided with a plurality of lower through holes penetrating in the vertical direction in an array distribution, and each of the upper through holes, the middle through holes and the lower through holes corresponds to each other and is aligned and connected up and down to form a connecting through hole; After the stealth layer, the reflective layer and the thermal insulation layer are stacked together, the stealth layer, the reflective layer and the thermal insulation layer are wrapped with quartz fiber cloth to form a whole; the upper and lower sides of the quartz fiber cloth are provided with openings at positions corresponding to the connecting through holes; The connecting through holes are divided into wire-passing through holes and glue-injection through holes; quartz yarn passes through the wire-passing through holes to perform vertical perforations and fix the stealth layer, the reflective layer and the thermal insulation layer; the glue-injection through holes are used for injecting 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 periodically arranged up and down and bonded in sequence; the first stealth layer, the second stealth layer ... an Nth stealth layer are made of different stealth materials, and N is greater than or equal to two.

3. The stealth composite panel according to claim 1, characterized in that: Among the connecting through holes, the connecting through holes located at the peripheral positions are used as wire passing through holes, and the remaining connecting through holes are used as glue injection through holes.

4. The stealth composite panel according to claim 1, characterized in that: The sealing position of the quartz fiber cloth is located at the bottom of the thermal insulation layer. The sealing layer is laid at the bottom of the thermal insulation layer to seal the quartz fiber cloth. Openings are arranged at positions corresponding to the connecting through holes.

5. The stealth composite panel according to claim 4, characterized in that: The reflective layer is covered with carbon fiber; the thermal insulation layer is covered with polyurethane foam; and the sealing layer is covered with carbon fiber.

6. A mold for preparing a stealth composite panel, characterized in that: The preparation mold comprises a mold upper cover, a mold middle box and a mold lower cover, and the mold upper cover, the mold middle box and the mold lower cover are detachably assembled; The upper and lower sides of the mold box are set as grooves, which are respectively matched with the bosses of the mold upper cover and the mold lower cover; a plurality of molding cavities are arranged in the middle position of the mold box, and the molding cavities are open at the top and bottom, and the shape is adapted to the stealth composite plate described in any one of claims 1 to 4; on the side of the matching surface with the mold upper cover, a guide groove is opened between two adjacent molding cavities, and the two ends of the guide groove are respectively connected to the two molding cavities; on the side of the matching surface with the mold lower cover, a notch is set on the outer edge of each molding cavity as a guide groove; A boss is provided in the middle of the inner side of the mold upper cover, which is engaged with the upper groove of the mold middle box; an inlet guide hole is also provided on the mold upper cover; the position of the inlet guide hole corresponds to and is connected with the guide groove; A boss is provided in the middle of the inner side of the mold lower cover, which cooperates with the lower groove of the mold middle box for stopper; a guide hole is also opened on the mold lower cover, and the position of the guide hole corresponds to and is connected with the guide groove.

7. The mold for preparing the stealth composite panel according to claim 6, characterized in that: The mold upper cover, the mold middle box and the mold lower cover are correspondingly provided with bolt mounting holes around them for the penetration connection of the bolts to achieve the connection and fixation between the mold upper cover, the mold middle box and the mold lower cover.

8. The mold for preparing the stealth composite panel according to claim 6, characterized in that: The forming cavity is a square hole made by wire cutting technology.

9. The mold for preparing the stealth composite panel according to claim 6, characterized in that: The middle part of the guide groove is enlarged and corresponds to and communicates with the guide hole of the mold upper cover.

10. A method for preparing a stealth composite plate, characterized in that The following steps are involved: (1) Preparing the preparation mold described in any one of claims 6 to 9 and the stealth composite panel described in any one of claims 1 to 5; (2) Place the stealth composite panel into each molding cavity of the mold box with the quartz fiber cloth facing upward; (3) Assemble and fix the mold upper cover, the mold middle box and the mold lower cover, and connect the inlet pipe to the inlet guide hole of the mold upper cover, and connect the outlet pipe to the outlet guide hole of the mold lower cover; (4) Using vacuum adsorption assisted glue filling process for molding; The air in the prepared mold is extracted through a vacuum press, thereby forming a pressure difference with the external atmospheric pressure. The resin is poured into the mold through the inlet tube through the pressure difference, and the resin is guided to both sides into the molding cavity through the guide groove. The resin completely penetrates the stealth composite plate and is guided out through the guide groove and the guide tube. During the molding process, glue columns are formed in the glue injection holes in the stealth composite plate to increase the bonding force between the stealth layer and the skin. The quartz yarn passing through the wire through holes cooperates with the glue injection to tightly connect the stealth composite plates.

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