Bulletproof plug board

Abstract

The utility model relates to the technical field of bulletproof inserting plates, in particular to a bulletproof inserting plate which comprises a ceramic material layer, an alloy layer, an anti-sinking layer, an energy absorption layer and a UD plate layer. The energy absorption layer comprises a titanium alloy material layer with a honeycomb structure and a Kevlar material layer with a honeycomb structure, the titanium alloy material layer and the Kevlar material layer are compounded into an integrated structure, and the honeycomb structure is filled with an energy absorption material, so that bullets can be more effectively defended, the weight is reduced, and the defensive performance is improved; the bullets with the initial velocity of about 900 m / s can be well defended due to the fact that the bullets with the initial velocity of about 900 m / s are of a stronger energy absorption layer structure.

Description

Technical Field

[0001] This utility model relates to the field of bulletproof insert technology, specifically to a bulletproof insert. Background Technology

[0002] As an important protective unit for individual soldiers, bulletproof plates have evolved from ancient rattan and leather materials to bronze armor, and later to metal-based armor. They have continued to receive global attention until DuPont invented Kevlar aramid fiber and the Dutch invented ultra-high molecular weight polyethylene fiber composite material UHMWPE.

[0003] In recent years, due to the continuous upgrading of strategic weapons, the demand for ballistic plates has been increasing. For example, the XM5 rifle and the XM250 squad automatic weapon fire the new 6.8x51mm high-pressure, high-velocity ammunition designed by Sig Sauer. This ammunition uses a hybrid metal cartridge case and is fired from a 16-inch (406mm) long barrel, which can make a 135-grain (8.75-gram) bullet reach a muzzle velocity of 3,000 feet per second (914 meters per second) and a muzzle energy of approximately 2,700 feet-pounds (3,661 joules). This is a high-powered, high-velocity, lightweight ammunition with a low trajectory and considerable armor-piercing capability. The deployment of the new 6.8mm caliber ammunition has placed higher demands on the protective capabilities of ballistic plates. Through the evolution of material systems, it can be seen that lightweighting and functionality are the constant themes of individual soldier protective equipment. The effective combination of different materials is the key to improving the ballistic protection function of ballistic plates and overcoming the weight bottleneck. Therefore, individual soldier protective equipment with good protective performance and lightweight features plays a very important role.

[0004] In recent years, many experts and scholars have conducted relevant research in this area, but it is difficult to protect against the penetration of the Type 53 7.62mm armor-piercing incendiary round with an initial velocity of 880m / s, especially against 6.8mm light weapons with an initial velocity of 934m / s and 8.6mm light weapons with an initial velocity of 950±10m / s. Utility Model Content

[0005] The purpose of this invention is to provide a bulletproof insert to solve the problems of existing bulletproof inserts being too heavy and having low defensive performance. Another purpose of this invention is to solve the problem that bulletproof inserts cannot effectively protect against the penetration of Type 53 7.62mm incendiary penetrators with a muzzle velocity of 880m / s, especially against 6.8mm light weapons with a muzzle velocity of 934m / s and 8.6mm light weapons with a muzzle velocity of 950±10m / s.

[0006] The technical solution adopted in this application to address this technical problem is as follows:

[0007] A bulletproof insert includes a ceramic material layer, an alloy layer, a dent-resistant layer, an energy-absorbing layer, and a UD plate layer layer, which are sequentially layered.

[0008] The energy-absorbing layer includes a titanium alloy material layer with a honeycomb structure and a Kevlar material layer with a honeycomb structure. The titanium alloy material layer and the Kevlar material layer are combined into an integral structure. The honeycomb energy-absorbing structure can more effectively defend against bullets, reduce weight, and improve defensive performance.

[0009] Furthermore, the honeycomb structure has a thickness of 2mm-4mm and a pore size of 2mm-8mm, and is filled with energy-absorbing material.

[0010] Furthermore, the thickness of the ceramic material layer is 5mm-9mm, and a crack-stopping layer is connected to both sides of the ceramic material layer. The crack-stopping layer is a sheet-like material made of Kevlar fiber, and the thickness of the crack-stopping layer is 1mm. The crack-stopping layer made of Kevlar fiber binds the interior of the ceramic material, so even if the material breaks, it is not easy to fall out of the crack-stopping layer, but will continue to remain inside the crack-stopping layer, thereby improving the continuous bulletproof capability of the bulletproof insert.

[0011] Furthermore, the alloy layer is an α+β dual-phase titanium alloy with a thickness of 3mm-5mm, which has good mechanical properties and can effectively reduce material density and improve material strength.

[0012] Furthermore, a carbon nanotube-polyurea resin coating is provided on both sides of the alloy layer. In the carbon nanotube-polyurea resin coating, the weight of carbon nanotubes accounts for 15%-30% of the weight of polyurea resin, and the thickness of the carbon nanotube-polyurea resin coating is 2mm-5mm.

[0013] Furthermore, the anti-dent layer is a fiber cloth impregnated with adhesive, and the thickness of the anti-dent layer is 0.8mm-1.4mm.

[0014] Furthermore, the UD board layer is an ultra-high molecular weight polyethylene board formed by stacking UD fabrics, and the side of the ultra-high molecular weight polyethylene board is connected with Kevlar fiber cloth impregnated with adhesive.

[0015] Furthermore, the adhesive is any one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive, or silicone adhesive.

[0016] Furthermore, it also includes the edge sealing layer.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention features a honeycomb-shaped energy-absorbing layer, which can significantly reduce the impact pressure on critical parts. Under the same impact conditions, the honeycomb-shaped energy-absorbing material of this invention can absorb energy more effectively. After the honeycomb structure is filled with energy-absorbing material, the energy absorption effect is further enhanced. Moreover, it uses less metal material and is lightweight overall.

[0019] This invention provides crack-stopping layers on both sides of the ceramic material layer. These crack-stopping layers can effectively prevent the ceramic material from cracking after being subjected to impact, confining the material inside the crack-stopping layer and improving its continuous bulletproof capability.

[0020] After processing, the alloy layer forms an α+β dual-phase titanium alloy, which has high strength and high toughness, good comprehensive performance, good structural stability, high tensile strength and yield strength. After aging, the tensile strength can reach 1500-2000MPa. Furthermore, after coating the surface with a carbon nanotube-polyurea resin coating, it has excellent waterproof, anti-corrosion, wear-resistant, erosion-resistant, bulletproof, and explosion-proof properties, and also improves the bonding force with other layers. Attached Figure Description

[0021] Figure 1 This is a layer structure diagram of this utility model.

[0022] The labels in the attached diagram are as follows: 1. Edge sealing layer; 2. Crack-resistant layer; 3. Ceramic material layer; 4. Carbon nanotube-polyurea resin coating; 5. Alloy layer; 6. Anti-dent layer; 7. Energy-absorbing layer; 8. Titanium alloy material layer; 9. Kevlar material layer; 10. UD sheet layer; 11. Kevlar fiber cloth; 12. UD cloth. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] like Figure 1 As shown, a bulletproof insert includes a boron nitride ceramic material layer 3, a titanium alloy layer 5, an anti-dent layer 6, an energy-absorbing layer 7, and a UD plate layer 10 connected in sequence. The layers are bonded together by hot pressing with adhesive and wrapped with an edge sealing layer 1.

[0025] The boron nitride ceramic material layer 3 has a thickness of 5mm-9mm. Two sides of the ceramic material layer 3 are connected to a sheet-like crack-stopping layer 2 made of Kevlar fiber. The crack-stopping layer 2 has a thickness of 1mm. Because of the Kevlar fiber material coating, the boron nitride ceramic is not easy to break, or even if it breaks, it is not easy to fall off and can still remain on the bulletproof insert, thus providing a protective effect.

[0026] The method for manufacturing alloy layer 5 is as follows: Take a 4-6mm thick titanium alloy plate, heat it to 800-1000℃, and then roll it in a roller press to a thickness of 3.0-5.0±0.2mm. The rolling pressure is 3.5-9MPa, and the rolling speed is 350-500mm / s. Then, cut it into the required dimensions for the bulletproof curved surface on a laser cutting machine for later use. The titanium alloy material produced in this way has α+β dual phases, good comprehensive properties, good structural stability, good toughness, plasticity, and high-temperature deformation performance. It can be well subjected to hot pressure processing and can be strengthened by quenching and aging.

[0027] The alloy layer 5 has a carbon nanotube-polyurea resin coating 4 on both sides. In the carbon nanotube-polyurea resin coating 4, the weight of carbon nanotubes accounts for 15%-30% of the weight of polyurea resin, and the thickness of the carbon nanotube-polyurea resin coating 4 is 2mm-5mm.

[0028] The anti-dent layer 6 is a fiber cloth impregnated with adhesive, and the thickness of the anti-dent layer 6 is 0.8mm-1.4mm.

[0029] The energy-absorbing layer 7 comprises a titanium alloy material layer 8 and a Kevlar material layer 9. Both the titanium alloy material layer 8 and the Kevlar material layer 9 are honeycomb structures formed by 3D printing. The titanium alloy material layer 8 and the Kevlar material layer 9 are in-situ composited into a single structure. The bottom layer of this honeycomb structure is a titanium alloy material layer 8 with a thickness of 1mm-1.8mm, which is 3D printed in a honeycomb shape. The surface layer is made of Kevlar material, which is also achieved by 3D printing. The honeycomb Kevlar material layer 9 is directly printed on the surface of the titanium alloy material layer 8 to form an in-situ composite structure. The thickness of the honeycomb structure is 2mm-4mm, and the pore size is 2mm-8mm. The energy absorption effect is achieved by changing the texture and porosity of the honeycomb structure in the radial and axial directions. The honeycomb structure is filled with energy-absorbing material, which can significantly attenuate the impact pressure of key parts and effectively absorb energy under the same impact.

[0030] The UD board layer 10 is an ultra-high molecular weight polyethylene board formed by stacking UD cloth 12, and the side of the ultra-high molecular weight polyethylene board is connected to a Kevlar fiber cloth 11 impregnated with adhesive.

[0031] The adhesive is any one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive or silicone adhesive.

[0032] The bulletproof insert of this invention has an overall thickness of 22mm-25mm. Tested with a Type 53 7.62mm ballistic gun, using 6.8mm armor-piercing rounds fired six times at 15 meters, the initial velocities were 934m / s, 940m / s, 936m / s, 934m / s, 935m / s, and 938m / s respectively. The bulges in the bulletproof insert were 29.3mm, 24.7mm, 23.6mm, 28.2mm, 28.9mm, and 24.4mm. It can be heated to 70℃ for heat preservation. After 24 hours at a constant temperature of -55℃, three 6.8mm armor-piercing rounds were fired at 15 meters, with initial velocities of 936m / s, 939m / s, and 943m / s respectively. The bulges in the bulletproof plates were 24.2mm, 25.3mm, and 27.3mm respectively. After 24 hours at a constant temperature of -55℃, three 6.8mm armor-piercing rounds were fired at 15 meters, with initial velocities of 937m / s, 941m / s, and 946m / s respectively. The bulges in the bulletproof plates were 25.8mm, 29.2mm, and 30.9mm respectively.

[0033] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

Claims

1. A bulletproof insert, characterized in that, It includes a ceramic material layer (3), an alloy layer (5), an anti-dent layer (6), an energy-absorbing layer (7), and a UD plate layer (10) that are layered sequentially. The energy-absorbing layer (7) includes a titanium alloy material layer (8) with a honeycomb structure and a Kevlar material layer (9) with a honeycomb structure, and the titanium alloy material layer (8) and the Kevlar material layer (9) are combined into an integral structure.

2. The bulletproof insert according to claim 1, characterized in that, The honeycomb structure has a thickness of 2mm-4mm and a pore size of 2mm-8mm, and is filled with energy-absorbing material.

3. A bulletproof insert according to claim 1, characterized in that, The two sides of the ceramic material layer (3) are connected to a crack-stopping layer (2), which is a sheet-like material made of Kevlar fiber.

4. A bulletproof insert according to claim 1, characterized in that, The alloy layer (5) is an α+β dual-phase titanium alloy.

5. A bulletproof insert according to claim 1, characterized in that, The alloy layer (5) has a carbon nanotube-polyurea resin coating (4) on both sides.

6. A bulletproof insert according to claim 1, characterized in that, The anti-dent layer (6) is a fiber cloth impregnated with adhesive.

7. A bulletproof insert according to claim 1, characterized in that, The UD board layer (10) is an ultra-high molecular weight polyethylene board formed by stacking UD cloth (12), and the side of the ultra-high molecular weight polyethylene board is connected with Kevlar fiber cloth (11) impregnated with adhesive.

8. A bulletproof insert according to claim 1, characterized in that, It also includes the edge sealing layer (1).

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