CN110375583B

CN110375583B - Buffering type bulletproof method and bulletproof composite board

Info

Publication number: CN110375583B
Application number: CN201910628199.5A
Authority: CN
Inventors: 李生勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2022-10-21
Anticipated expiration: 2039-07-12
Also published as: CN110375583A

Abstract

The invention discloses a buffer type bulletproof method and a bulletproof composite board, wherein the method comprises the steps of adopting a high-resistance material to manufacture a penetrable resistance layer so as to reduce the impact speed of bullets; one or more groups of superposed energy absorbing layers are arranged at the inner side of the resistance layer to ensure that the bullet speed is reduced to 0m/s; the energy absorbing layer comprises a buffer layer and a support layer which are overlapped, wherein the buffer layer comprises one or more fiber fabrics, the fiber fabrics are stacked in a multi-layer mode to improve strength, and the density is suitable for blocking broken elastic sheets. When the bullet strikes the cushioning layer, its kinetic energy is diffused through the interwoven fiber threads and is absorbed over a wide range. The supporting layer is connected with one surface of the buffer layer, which is far away from the resistance layer, is made of alloy materials and is used for maintaining the shape of the buffer layer and preventing bullets from penetrating. The bulletproof composite board comprises a resistance layer and an energy absorption layer which are superposed. The bulletproof composite board manufactured by the method has low cost, can effectively prevent bullet impact and avoid bullet rebound.

Description

Buffering type bulletproof method and bulletproof composite board

Technical Field

The invention relates to the field of protective equipment, in particular to a buffering type bulletproof method and a bulletproof composite board.

Background

The bulletproof plate can protect personnel and property from being threatened by bullets or explosions and the like, and is widely applied to industrial facilities such as cash trucks, banks, military armored vehicles, houses, hospitals, warehouses and the like in war areas. Due to the development trend of the bulletproof plate for both military and civil use, the requirements of people on the cost and the safety are higher and higher. Along with the improvement of the maneuverability of the combat equipment, the requirement of people on the weight of the bulletproof plate is higher and higher. Conventional ballistic panels are made of steel plates, which, due to the limited stiffness of the steel plates, require an increased thickness to achieve the objective of rebounding the bullets. The disadvantage of this method is that the weight of the ballistic panel is increased and the rebound of the bullet is not controlled. At present, the mainstream bulletproof plate is made of ceramic materials, and the aim of bulletproof is achieved by utilizing the hardness of the bulletproof plate. The method has the disadvantages that the ceramic material needs to be arranged in the composite armor system to restrain the fragments of the ceramic material, the fragment movement direction of the bullet is uncontrollable, and the cost is high.

Accordingly, there is a need for a ballistic panel that is lightweight, low cost, and effective in stopping bullets and preventing rebound of the bullets.

Disclosure of Invention

In order to solve the problems of heavy weight, high cost, uncontrollable bullet rebound and the like of the existing bulletproof plate, the invention innovatively discloses a manufacturing method of a bulletproof composite plate, which comprises the following steps:

the resistance layer which can be punctured is used for meeting the impact of the bullet, when the bullet impacts the resistance layer, the kinetic energy of the bullet is consumed by the resistance layer in a plastic deformation mode, so that the impact speed of the bullet is reduced, and the bullet point deforms or cracks while penetrating through the resistance layer;

absorbing the residual kinetic energy of the bullet by one or more groups of energy absorbing layers, wherein each energy absorbing layer comprises a buffer layer and a supporting layer;

one or more fiber fabrics are adopted to prepare a buffer layer, kinetic energy of the bullet is diffused through interwoven fiber threads after the bullet enters the buffer layer, and the fiber fabrics consume the energy of the bullet in a deformation and/or fracture mode; the shape of the cushioning layer is maintained and penetration of bullets is prevented by a support layer made of an alloy material.

Based on above-mentioned technical scheme, the bullet can puncture the resistance layer and slow down, absorbs the surplus energy through the energy-absorbing layer, has solved the problem that prior art exists.

Preferably, the penetration hole is formed when the bullet penetrates the resistance layer, and the kinetic energy of the bullet is dissipated by the way that the inner edge of the penetration hole rubs against the outer wall of the bullet.

Preferably, the surface area of the front end of the bullet point is increased by the resistance layer while the bullet penetrates the resistance layer, so as to increase the contact area of the bullet point and the energy absorption layer.

In order to achieve the technical purpose, the invention also discloses a bulletproof composite board, which comprises a resistance layer and one or more groups of superposed energy absorption layers;

the resistance layer is used for consuming kinetic energy of the bullet in a plastic deformation mode and reducing the impact speed of the bullet;

the energy absorption layer is arranged on the inner side of the resistance layer and is used for absorbing the residual kinetic energy of the bullet;

the energy absorption layer comprises a buffer layer and a supporting layer arranged on the inner side of the buffer layer, the buffer layer comprises a plurality of layers of one or more kinds of fiber fabrics which are overlapped, and the buffer layer is used for consuming bullet energy in a deformation and/or fracture mode;

the support layer is made of an alloy material, and the support layer is used for maintaining the shape of the buffer layer and preventing bullets from penetrating.

Based on foretell technical scheme, the bullet can puncture the resistance layer and slow down, absorbs the surplus energy through the energy-absorbing layer, has solved the problem that prior art exists.

Preferably, the resistance layer is a concave steel plate.

Based on the improved technical scheme, the bullet can penetrate through and deflect the track when impacting the resistance layer, and further consumes kinetic energy.

Preferably, the buffer layer is formed by hot press molding after coating the polyethylene fabric and the aramid fabric with the adhesive.

Based on the improved technical scheme, the buffer layer has the advantages of high elasticity resistance of polyethylene fabrics and high temperature resistance of aramid fabrics.

Preferably, the support layer is a magnesium plate or an aluminum alloy plate.

Based on the improved technical scheme, the bulletproof composite plate can effectively block bullets and keep lighter weight.

The beneficial effects of the invention are as follows: compared with the prior art, the bulletproof composite board has the advantages of light weight, low cost and the like. The invention can effectively resist bullets and prevent bullets from rebounding. The invention can be directly used as armor without other supporting pieces, and has wide application range.

Drawings

Fig. 1 is a schematic flow chart of a buffer type bulletproof method according to a preferred embodiment of the invention.

Fig. 2 is a schematic diagram of a bulletproof composite board structure in a second embodiment of the present invention.

Fig. 3 is a schematic diagram of a bulletproof composite plate structure in a third embodiment of the present invention.

Fig. 4 is a schematic structural view of a bulletproof composite plate according to a fourth embodiment of the present invention.

In the figure, 1, a resistance layer; 2. a buffer layer; 3. and (4) a support layer.

Detailed Description

The manufacturing method of several bulletproof composite boards and several bulletproof composite boards specifically provided by the invention are explained and explained in detail in the following with the contents of the attached drawings of the specification.

The first embodiment is as follows:

the embodiment discloses a manufacturing method of a bulletproof composite board, aiming at the problems of heavy weight, high cost, uncontrollable bullet rebound and the like of the conventional bulletproof composite board. The bulletproof composite board comprises a resistance layer and an energy absorption layer. Wherein the energy absorption layer comprises a buffer layer and a support layer. The high-resistance material is adopted to manufacture the resistance layer as the bullet-facing surface of the bulletproof composite board, and the resistance layer has a proper thickness, and the limit penetration speed of the resistance layer is lower than the impact speed of a bullet so as to allow the bullet to penetrate through the resistance layer. The high-resistance material used for the resistance layer can be selected from steel, aluminum alloy and titanium alloy, and the limit penetration speed of the high-resistance material is lower than the impact speed of the bullet by pertinently changing the thickness. The thickness of the resistance layer can be 0.5 mm-4 mm; preferably, the resistive layer is 0.7mm thick. When the bullet impacts the resistance layer, the kinetic energy of the bullet is consumed by the resistance layer through plastic deformation, so that the impact speed of the bullet is reduced, and when the bullet penetrates through the resistance layer, the bullet tip is deformed or cracked, so that the action area of the bulletproof composite board is increased. Preferably, when the bullet penetrates through the resistance layer, the surface area of the front end of the bullet point is increased, the contact area of the bullet point and the energy absorption layer is increased, and the tearing capacity is reduced. The bullet enters the bulletproof composite board in a controllable mode, and loss caused by rebound can be avoided. The material of the resistance layer is preferably a steel plate, and the steel plate is high in rigidity and not prone to deformation or cracking. The resistive layer preferably has an inwardly facing concave surface, the trajectory of which is inwardly deflected when the bullet impacts the resistive layer, enabling dissipation of kinetic energy while ensuring breakdown. The penetration of the bullet through the resistive layer dissipates a portion of the kinetic energy and thus effectively reduces the penetration force of the bullet. The cushioning layer comprises one or more fabrics, the fabrics are stacked in multiple layers to improve strength, and the fabrics have a density suitable for blocking broken shrapnel. The fiber fabric used for preparing the buffer layer can be one or more of glass fiber, vinylon fiber, polyethylene fiber and aramid fiber, and preferably is polyethylene fiber and aramid fiber. The density of the fabric needs to be such as to stop the broken shrapnel, and the number of layers can be adjusted as required to ensure that the bullet velocity can be reduced to zero. The buffer layer has the advantages of high elasticity prevention and high temperature resistance at the same time by alternately superposing the polyethylene fabric and the aramid fabric. The support layer can be made of light metal material, such as magnesium or aluminum alloy. The support layer functions to maintain the shape of the cushioning layer while preventing penetration of bullets. The buffer layer and the supporting layer are superposed to form an energy absorbing layer. When the bullet impacts the buffer layer, the kinetic energy of the bullet is diffused through the interwoven fiber threads and is absorbed in a larger range, the fabric absorbs the residual energy of the bullet through the forms of stretching deformation, friction, fracture and the like, the speed of the bullet is reduced to zero, and the bullet is embedded into the buffer layer or falls down. The energy absorption layer is arranged on the inner side of the resistance layer, and one or more elastic bodies can be flexibly arranged according to requirements so as to deal with different speeds of impact. Preferably, the bulletproof composite board is of a self-supporting integral structure, and can be directly used for manufacturing devices such as armored walls, armored vehicles and the like without other supporting pieces. The resistance layer and the energy absorption layer can be integrally solidified into a whole body through thermoplastic materials or connected through bolts. The bulletproof composite board connected through the bolts can flexibly combine or replace the resistance layer and the energy absorption layer. Compared with other bulletproof plates of the same level, the preparation method of the bulletproof composite plate disclosed by the invention has the advantages of low cost, self-support and capability of avoiding bullet rebound, and the weight can be saved by 35-40%.

Example two:

compared with the first embodiment, the first embodiment is provided with the energy absorption layers and the support layer made of the magnesium alloy plate, so that the overall structure is lighter in weight. As shown in fig. 2, the resistance layer is made of a steel plate, and the thickness of the resistance layer is adjusted so that the limit penetration speed is lower than the impact speed of the bullet, thereby ensuring that the bullet can penetrate the resistance layer regardless of distribution. The buffer layer is manufactured by coating solvent adhesives such as polyurethane adhesive, nano-silica slurry and the like on 5 layers of polyethylene fabrics and 5 layers of aramid fabrics which are alternately superposed and then curing the fabrics through hot pressing. The support layer is made of a magnesium alloy sheet. And coating a thermoplastic adhesive on the surface of the supporting layer, bonding the formed buffer layer on the surface of the supporting layer, and pressing into a whole to prepare the energy absorbing layer. And connecting the resistance layer and the energy absorption layer through bolts.

Example three:

compared with the embodiment, the embodiment is provided with two groups of superposed energy absorption layers, and the bullet with higher speed can be stopped. The bulletproof composite board in the embodiment is integrally thermally cured, can be self-supported, and can be directly used as an armor. As shown in fig. 3, the resistance layer is made of a steel plate, and the thickness of the resistance layer is adjusted so that the limit penetration speed is lower than the impact speed of the bullet, thereby ensuring that the bullet can penetrate the resistance layer regardless of distribution. The support layer is made of a magnesium alloy plate. And 3 layers of polyethylene fabrics and 3 layers of aramid fabrics are alternately superposed on the surface of the support layer to form an energy absorption layer. The other energy absorbing layer is made by the above method. The resistance layer and the two energy absorption layers are overlapped and sealed integrally, and then resin is introduced into the resin and placed in a heating system to be cured into a whole.

Example four:

compared with the embodiment, the embodiment adopts the concave steel plate to make the resistance layer, and the movement track deflects to consume energy when the bullet impacts the resistance layer. As shown in fig. 4, the resistance layer is made of concave steel plate, and the thickness of the resistance layer is adjusted to make the limit penetration speed lower than the impact speed of the bullet, so that the bullet can penetrate the resistance layer regardless of distribution. And (3) laminating 50 layers of polyethylene fabrics and 1 layer of aramid fabrics, and pressing the laminated fabrics into a whole by a hydraulic press to prepare the buffer layer. The support layer is made of an aluminum alloy plate. And adhering the prepared resistance layer, the buffer layer and the support layer together through an adhesive.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of ballistic abatement, the method comprising:

the resistance layer capable of being punctured is used for meeting the impact of the bullet, when the bullet impacts the resistance layer, the kinetic energy of the bullet is consumed by the resistance layer in a plastic deformation mode, so that the impact speed of the bullet is reduced, and the bullet penetrates through the resistance layer and the bullet tip is deformed or cracked;

absorbing the residual kinetic energy of the bullet by utilizing a plurality of groups of energy absorbing layers, wherein each energy absorbing layer comprises a buffer layer and a supporting layer;

the method is characterized in that a buffer layer is made of various fiber fabrics, kinetic energy of the bullet is diffused through interwoven fiber threads after the bullet enters the buffer layer, and the fiber fabrics consume the energy of the bullet in a deformation and/or fracture mode; the shape of the buffer layer is maintained and the penetration of bullets is prevented by the supporting layer made of alloy materials;

the thickness of the resistance layer is 0.7mm, and the resistance layer is a concave steel plate; the buffer layer is formed by hot-press molding after coating adhesive on polyethylene fabric and aramid fabric which are alternately superposed;

the method comprises the steps of alternately superposing 3 layers of polyethylene fabrics and 3 layers of aramid fabrics on the surface of a supporting layer to form an energy absorption layer, forming another energy absorption layer by the method, superposing a resistance layer and two energy absorption layers to be integrally sealed, introducing resin, placing the resin in a heating system, and curing the resin into a whole, wherein the energy absorption layer is arranged on the inner side of the resistance layer, and the supporting layer is arranged on the inner side of a buffer layer.

2. A method of ballistic buffering according to claim 1, characterized in that the penetration hole is formed when the bullet penetrates the resistance layer, the kinetic energy of the bullet being dissipated by the inner edge of the penetration hole rubbing against the outer wall of the bullet.

3. A ballistic abatement method according to claim 1 or 2, wherein the surface area of the front end of the bullet tip is increased by the resistance layer while the bullet penetrates the resistance layer to increase the contact area of the bullet tip and the energy absorbing layer.

4. A bulletproof composite board is characterized in that the bulletproof composite board comprises a resistance layer and a plurality of groups of superposed energy absorption layers;

the energy absorption layer comprises a buffer layer and a support layer arranged on the inner side of the buffer layer, the buffer layer is made of various fiber fabrics, and the buffer layer is used for consuming bullet energy in a deformation and/or fracture mode;

the supporting layer is made of alloy materials and is used for maintaining the shape of the buffer layer and preventing bullets from penetrating; the resistance layer is a concave steel plate; the buffer layer is formed by hot-press molding after coating adhesive on polyethylene fabric and aramid fabric which are alternately superposed, 3 layers of polyethylene fabric and 3 layers of aramid fabric are alternately superposed on the surface of the supporting layer to form an energy absorbing layer, the other energy absorbing layer is formed by the method, and the resistance layer and the two energy absorbing layers are superposed, sealed integrally and then introduced into resin and placed in a heating system to be solidified into a whole.

5. A ballistic resistant composite panel according to claim 4, characterized in that the support layer is a magnesium or aluminium alloy sheet.