Bulletproof wave-transparent lightweight scout car wallboard and preparation method thereof

Abstract

The invention discloses a bulletproof wave-transparent lightweight scout car wallboard and a preparation method thereof, and belongs to the technical field of military armor. The wallboard is of a multi-layer composite structure and sequentially comprises a flame-retardant glass fiber reinforced plastic outer skin, a first foam layer, a bulletproof layer, a second foam layer and a flame-retardant glass fiber reinforced plastic inner skin from outside to inside. The bulletproof layer is composed of block-shaped bulletproof plates and strip-shaped bulletproof plates installed in the aluminum square tube framework, and the bulletproof layer and the framework are fixed in a threaded connection mode through rib plates, so that a high-strength whole is formed. And after being coated with epoxy resin glue, the components are subjected to hot-pressing curing molding. Through the unique framework built-in bulletproof composite structure, bulletproof, wave-transparent, heat-insulating and light-weight functions are integrated, the problems that a traditional scout car wall plate is large in weight and poor in wave-transparent performance are effectively solved, and the maneuverability and protection reliability of a vehicle are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle equipment technology, specifically to a bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel and its manufacturing method. Background Technology

[0002] After years of development, military containerization units have become the main equipment for carrying ground mobile equipment and military personnel. With the increasing globalization and mobility of modern warfare, the complex battlefield environment, and the widespread use of advanced guided weapons, military containerization units face unprecedented threats on the battlefield. Therefore, improving the ballistic protection performance of military containerization units is imperative. At the same time, the development of military containerization units must also meet the requirements of mobile warfare and three-dimensional offense and defense, adapting to the pace of armor protection and ballistic development for highly mobile light armored vehicles.

[0003] Military shelters typically use external steel plates to enhance their ballistic protection, and traditionally, the inner and outer skins are made of pressed aluminum plates. However, reconnaissance vehicles are tasked with missions such as operating drones for reconnaissance and robots for sampling in harsh environments. Therefore, aluminum skins are insufficient for the radar transmittance of reconnaissance vehicles, and the weight of the steel plates themselves makes it difficult for reconnaissance vehicles to meet mobility requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a simple, reliable, bulletproof, wave-transparent, and lightweight reconnaissance vehicle wall panel and its manufacturing method, aiming to overcome the defects of the prior art and avoid the shortcomings of the aforementioned reconnaissance vehicle wall panel structure.

[0005] Therefore, the present invention proposes a bulletproof and wave-transparent lightweight reconnaissance vehicle wall panel, comprising an outer skin, a first foam layer, a bulletproof layer, a second foam layer and an inner skin stacked sequentially from the outside to the inside; The outer skin and inner skin are made of flame-retardant fiberglass sheets; The first foam layer and the second foam layer are polyurethane foam boards; The bulletproof layer includes block-shaped bulletproof plates and strip-shaped bulletproof plates, with the block-shaped bulletproof plates arranged between the first foam layer and the second foam layer; It also includes welded aluminum square tubes, which are spaced apart between two adjacent block bulletproof plates; the strip bulletproof plates are installed inside the aluminum square tubes by screws, and stiffeners are welded to both sides of the aluminum square tubes, which are fixedly connected to the block bulletproof plates by screws. The outer skin, first foam layer, aluminum square tube, block bulletproof plate, strip bulletproof plate, second foam layer and inner skin are bonded together with epoxy resin and cured by hot pressing to form a whole.

[0006] Preferably, the block-shaped bulletproof plate and the strip-shaped bulletproof plate are PE bulletproof plates, and their surfaces have been roughened.

[0007] Preferably, the block-shaped bulletproof plate has a square structure, and the strip-shaped bulletproof plate has a strip-shaped structure.

[0008] Preferably, the width of the strip-shaped bulletproof plate is suitable for the width of the inner cavity of the aluminum square tube.

[0009] Preferably, the thickness of the strip-shaped bulletproof plate is approximately half the height of the inner cavity of the aluminum square tube.

[0010] Preferably, a PVC heat insulation strip is embedded at the joint of the first foam layer and between the aluminum square tube and the outer skin.

[0011] Preferably, the flame-retardant fiberglass plates of the outer skin and inner skin are provided with a 0.3mm thick flame-retardant layer.

[0012] This invention also proposes a method for preparing a bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel, comprising the following steps: S1: Material preparation: Prepare flame-retardant fiberglass, polyurethane foam board, PVC thermal insulation strip, aluminum square tube, PE bulletproof plate, block bulletproof plate, strip bulletproof plate, and reinforcing plate; S2: Pre-treatment: Grinding and opening welding gaps in the aluminum square tubes and stiffening plates; roughening the surface of the block bulletproof plates and strip bulletproof plates; S3: Assemble the frame: Install the strip bulletproof plate into the inside of the aluminum square tube with screws; weld the aluminum square tube into a frame, weld the stiffening plates on the aluminum square tube, and fix the block bulletproof plate to the stiffening plates with screws to make the bulletproof plate and the frame a whole. S4: Applying adhesive: Apply epoxy resin adhesive to the bonding surfaces of polyurethane foam board, PVC thermal insulation strip, flame-retardant fiberglass and assembled frame. S5: Lamination and Hot Pressing: Lay the glued components in sequence, and then place them in a hot press for hot pressing and curing to bond the components together to form a wall panel; S6: Post-processing: Remove the wall panel workpiece and let it cool and stand. Clean and polish the excess adhesive on the wall panel surface.

[0013] Compared with existing technologies, the beneficial effects of the bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel and its manufacturing method provided by this invention are as follows: 1. Functional integration: Successfully integrates multiple functions such as bulletproof, wave-penetrating, lightweight and heat-insulating, perfectly meeting the needs of modern high-mobility reconnaissance vehicles; 2. Structural Innovation: Through the design of "embedded bulletproof plate in the skeleton" and "stiffening plate screw fixation", the bulletproof core is deeply integrated with the load-bearing structure, which not only optimizes the bulletproof effect, but also ensures the overall structural strength. 3. Reliable process: The hot-press curing process ensures the firmness and durability of the multi-layer heterogeneous material composite, fundamentally avoiding quality problems such as bulging and delamination that are prone to occur in traditional bonding.

[0014] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional schematic diagram of the bulletproof, wave-transparent, and lightweight reconnaissance vehicle wall panel of the present invention; Figure 2 This is a flowchart illustrating the preparation method of the bulletproof, wave-transparent, and lightweight reconnaissance vehicle wall panel in this invention. Explanation of reference numerals in the attached drawings: 1. Outer skin; 2. First foam layer; 3. PVC thermal insulation strip; 4. Aluminum square tube; 5. Block-shaped bulletproof plate; 6. Rib plate; 7. Screw; 8. Strip-shaped bulletproof plate; 9. Inner skin; 10. Second foam layer. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This invention provides a lightweight, bulletproof, and wave-transparent reconnaissance vehicle wall panel, which aims to solve the problems of poor wave transmission of aluminum skin and excessive weight caused by external steel plates in traditional reconnaissance vehicles, which cannot simultaneously meet the requirements of high mobility, bulletproof protection, and wave transmission of in-cabin electronic equipment.

[0018] See Figure 1 The wall panel of the present invention is a multi-layer composite structure, mainly composed of the following components: an outer inner skin, an outer skin, and an inner core layer and skeleton.

[0019] Specifically, the outer skin 1 and inner skin 9 of the wall panel are made of flame-retardant fiberglass panels. Fiberglass is lightweight, high-strength, and has good wave transmission properties, ensuring effective transmission of remote control signals for equipment such as drones and robots inside the cabin. Preferably, a flame-retardant layer of approximately 0.3 mm thickness is provided on the surface of the fiberglass panel to improve the fire safety performance of the wall panel.

[0020] The core layer and skeleton include a foam layer, a bulletproof layer and an aluminum square tube 4; two layers of polyurethane foam boards (first foam layer 2 and second foam layer 10) are set between the outer skin 1 and the inner skin 9 to provide heat insulation, sound insulation and cushioning.

[0021] The core bulletproof function is provided by PE (polyethylene) block bulletproof plates 5 and strip bulletproof plates 8, which are arranged between two layers of polyurethane foam boards. PE material has extremely high specific strength and specific modulus, which can effectively absorb and disperse ballistic impact energy, and its weight is much lighter than steel. The bulletproof plates can be processed into strips or squares for easy layout and installation.

[0022] The load-bearing structure of the wall panel is a welded aluminum square tube frame 4; the aluminum square tube is lightweight and has good structural strength. Its innovation lies in the fact that strip-shaped bulletproof plates 8 are pre-installed inside the aluminum square tube by screws. The width of the strip-shaped bulletproof plates 8 is suitable for the width of the inner cavity of the aluminum square tube 4, and the thickness of the strip-shaped bulletproof plates 8 is about half the height of the inner cavity of the aluminum square tube 4, so that the frame itself has bulletproof capability.

[0023] Meanwhile, stiffening plates 6 are welded to both sides of the aluminum square tube, and the stiffening plates 6 are then fixed to the PE block bulletproof plates 5 by screws 7. The aluminum square tubes 4 are spaced apart between two adjacent PE block bulletproof plates 5. This move firmly integrates the block bulletproof plates 5 into the frame system, greatly improving the stability and impact resistance of the overall structure.

[0024] In addition, a PVC insulation strip 3 can be embedded at the joint of the first foam layer 2 as needed; the PVC insulation strip 3 is specifically set between the aluminum square tube 4 and the outer skin 1 to further enhance the insulation effect.

[0025] In this solution, all components are bonded together with epoxy resin and then cured under specific temperature and pressure conditions using a hot press. This process allows components made of different materials to form a robust whole, avoiding problems such as delamination, bulging, and delamination, significantly improving the reliability and service life of the wall panel.

[0026] like Figure 2 As shown, the present invention also provides a method for preparing a bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel, which mainly includes the following steps.

[0027] Material preparation and pretreatment: First, cut and prepare all necessary materials, including flame-retardant fiberglass, polyurethane foam board, PVC thermal insulation strip, aluminum square tube, bulletproof plate, and reinforcing ribs; then, clean the surfaces of all components using cleaning agents such as alcohol; grind the aluminum square tube 4 and reinforcing rib 6 and prepare welding openings in preparation for welding. At the same time, roughen the surfaces of the block bulletproof plate 5 and strip bulletproof plate 8 to increase their surface area and improve the bonding strength with epoxy resin adhesive.

[0028] Frame Assembly: Install the strip-shaped bulletproof plate 8 into the interior of the aluminum square tube 4 using screws. Weld the aluminum square tube 4 into the required wall panel frame according to the design drawings. Weld the stiffening plate 6 at the middle position along the height direction of the aluminum square tube 4, and fix the block-shaped bulletproof plate 5 to the stiffening plate 6 with screws 7, ensuring that the bulletproof plate, frame and stiffening plate are tightly connected into a rigid whole.

[0029] Adhesive application and lamination: Apply a high-performance epoxy resin adhesive evenly to all bonding surfaces of the polyurethane foam board, PVC thermal insulation strip 3, flame-retardant fiberglass skin, and the assembled frame. Then, precisely laminate the components in the following order: "outer skin 1 → first foam layer → frame / bulletproof plate assembly (including thermal insulation strip) → second foam layer 10 → inner skin 9".

[0030] Hot pressing curing: The stacked assembly is fed into a hot press; hot pressing curing is carried out under the set temperature, pressure and time parameters; this process allows the epoxy resin to fully cure, irreversibly bonding the layers of material into a dense integral wall panel.

[0031] Post-processing: After hot pressing, the wall panel workpiece is removed and allowed to cool and set at room temperature. Finally, the wall panel is cleaned, and excess adhesive on the edges and surface is sanded off to complete the final product.

[0032] The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel and its preparation method described below also have the following characteristics.

[0033] 1. This invention uses fiberglass as the inner and outer skin and PE bulletproof plate as the bulletproof plate, which is lightweight and transparent, meeting the needs of reconnaissance vehicle for mobility, bulletproof protection, and in-cabin remote control intelligent equipment. 2. The present invention screws strip-shaped bulletproof plates inside the aluminum square tube, further improving the bulletproof performance of the wall panel; 3. In this invention, the PE bulletproof plate is screwed into the middle of the wall panel. At the same time, the PE bulletproof plate is roughened. The upper and lower surfaces of the bulletproof plate are connected to the inner and outer skins by bonding polyurethane foam boards, thereby improving the reliability of the wall panel.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel, characterized in that, It includes an outer skin (1), a first foam layer (2), a bulletproof layer, a second foam layer (10), and an inner skin (9) stacked sequentially from the outside to the inside. The outer skin (1) and inner skin (9) are flame-retardant fiberglass sheets; The first foam layer (2) and the second foam layer (10) are polyurethane foam boards; The bulletproof layer includes a block bulletproof plate (5) and a strip bulletproof plate (8), wherein the block bulletproof plate (5) is disposed between the first foam layer (2) and the second foam layer (10); It also includes welded aluminum square tubes (4), which are spaced apart between two adjacent block bulletproof plates (5); the strip bulletproof plate (8) is installed inside the aluminum square tube (4) by screws, and stiffeners (6) are welded on both sides of the aluminum square tube (4), and the stiffeners (6) are fixedly connected to the block bulletproof plate (5) by screws (7). The outer skin (1), the first foam layer (2), the aluminum square tube (4), the block bulletproof plate (5), the strip bulletproof plate (8), the second foam layer (10), and the inner skin (9) are bonded together with epoxy resin and cured by hot pressing to form a whole.

2. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 1, characterized in that, The block-shaped bulletproof plate (5) and the strip-shaped bulletproof plate (8) are PE bulletproof plates, and their surfaces have been roughened.

3. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 1, characterized in that, The block-shaped bulletproof plate (5) has a square structure, and the strip-shaped bulletproof plate (8) has a strip-shaped structure.

4. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 3, characterized in that, The width of the strip bulletproof plate (8) is suitable for the width of the inner cavity of the aluminum square tube (4).

5. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 4, characterized in that, The thickness of the strip bulletproof plate (8) is about half the height of the inner cavity of the aluminum square tube (4).

6. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 1, characterized in that, A PVC heat insulation strip (3) is embedded at the joint of the first foam layer (2) and between the aluminum square tube (4) and the outer skin (1).

7. The bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel according to claim 1, characterized in that, The outer skin (1) and inner skin (9) are provided with a 0.3mm thick flame-retardant layer on the surface of the flame-retardant fiberglass plate.

8. A method for preparing a bulletproof, wave-transparent, lightweight reconnaissance vehicle wall panel as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Material preparation: Prepare flame-retardant fiberglass, polyurethane foam board, PVC thermal insulation strip, aluminum square tube, PE bulletproof plate, block bulletproof plate, strip bulletproof plate, and reinforcing plate; S2: Pre-treatment: Grinding and opening welding gaps in the aluminum square tubes and stiffening plates; roughening the surface of the block bulletproof plates and strip bulletproof plates; S3: Assemble the frame: Install the strip bulletproof plate into the inside of the aluminum square tube with screws; weld the aluminum square tube into a frame, weld the stiffening plates on the aluminum square tube, and fix the block bulletproof plate to the stiffening plates with screws to make the bulletproof plate and the frame a whole. S4: Applying adhesive: Apply epoxy resin adhesive to the bonding surfaces of polyurethane foam board, PVC thermal insulation strip, flame-retardant fiberglass and assembled frame. S5: Lamination and Hot Pressing: Lay the glued components in sequence, and then place them in a hot press for hot pressing and curing to bond the components together to form a wall panel; S6: Post-processing: Remove the wall panel workpiece and let it cool and stand. Clean and polish the excess adhesive on the wall panel surface.

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