KR880002025B1 - The bullet proof construction - Google Patents

Abstract

The bullet proof construction, such as bullet proof helmet, jacket and aviation shed structure, consists of fabric base material and a lot of hemispheric pieces of high tough material, such as ceramics, silicone and plastics and high elastic rubber. Thus, hexagonal, rectangular or hemispheric pieces of ceramics are laminated on a fabric substrate followed by filling rubber in the gaps among the pieces.

Description

Bulletproof structure

1 is an example of a conventional bulletproof structure.

Figure 2 is a ballistic structure of the present invention.

3 is a partial cross-sectional view of the bulletproof structure of the present invention.

4 is a plan view of a bulletproof structure according to the present invention.

5 is an explanatory diagram showing a penetration thickness relationship according to the direction of the bullet.

* Explanation of symbols for main parts of the drawings

1: Base material 2, 3, 4: Ceramic hemisphere

5, 5 ': weak part 6: filler

The present invention is a high-strength high-elastic fibrous fabric as a substrate material and molding the hemispheres of super-rigid material (ceramic, silicon, carbide, polymer composite) as a high elastic material such as natural rubber or synthetic rubber (Molding) The present invention relates to a ballistic structure having improved bending property by stacking multiple layers. These bulletproof structures are designed to prevent the penetration of knives, spears, guns, and shells, and can be used for a wide range of areas such as personal armor, bulletproof helmets, armored vehicles (tanks), as well as ammunition and aircraft. It is.

In general, a bulletproof structure may include, for example, a breakbreaking suit made of a plurality of layers of Kebler fiber manufactured by DuPont in the USA (Phase 1 (a)) or a metal plate, ceramic, FRP, or the like. Kevlar suits may be molded or their small plates sewn into fabrics. In addition, as the prior art, as disclosed in the Japanese Patent Publication No. 55-34360, a bulletproof structure in which at least five layers are laminated alternately with super-high elastic fibers and ordinary fibers is used. (First (a) In addition to Fig. 1 (b)), Kevlar fiber is synthesized as a metal material (ultra hard iron plate) and a substrate material for ballistic prevention, and as a non-metal product, a composite product of ceramic and Kevlar fiber of polygonal flat plate is being developed. . However, since metal products have a higher specific gravity than non-metal products (for example, iron 7.7 to 7.9, ceramics 3.3 to 3.6, rubber 1.5), the protective equipment products using these metal products are firstly too heavy and lacking in flexibility. In addition, the above-described prior art imposes excessive constraints on rapid wearing and acting, and since the bullets in the right-angle direction are fired as they are, even if a high-strength high-elasticity material is particularly vulnerable and fundamentally bulletproof is impossible. Inconvenience and shock were transmitted to the body as it was or wounded, making it difficult to ensure full bulletproof performance.

In addition, the most recent prior art is that hexagonal ceramic pieces are stacked in a honeycomb form (first (c) and first (c ')). In fact, it is difficult to adequately protect a person's body by maintaining the "plate shape" without the flexibility. If you bend excessively to protect the fuselage, there is a seam of "ceramic" pieces, creating dangerous vulnerabilities. In this case, the joints (parts) on the other hand may form bulletproof fragility lines so as to prevent the seams from opening by adjusting the angle to the product by suppression. However, in order to improve the ballistic performance, if the composite honeycomb of the "honeycomb" type is double-layered (double), the performance will be reinforced, but the bending flexibility will be lost.

It should also be pointed out that since the surface is "flat", it takes all the impact of the bullet and causes it to burst.

The present invention relates to the lamination of highly elastic high-strength hemispheres in order to solve the above-mentioned drawbacks, and particularly to avoid drawbacks, plane shock absorbing, etc. The resistance is increased due to the seismic incidence of other "ceramic balls", and the weaknesses generated at the joints of the ceramic plate are formed as "dots" when using the "balls". Its volume is also reduced by about 1/2 compared to the cube, and there is a buffer device with a fixing agent such as "rubber" in the space, so it is easy to gain profit and construction.

In addition, the bulletproof gear of the "ball" type (in the case of a rifle iron shell: about 10mm in diameter) of the present application has little risk of breaking even if the user inadvertently throws it out of the "plate" type.

2 shows an example of a bulletproof structure according to the present invention.

The anti-ballistic structure of the present invention is a base material that is close to the human body base material is a thin fabric layer which is sealed by alternating the above-mentioned Kevlar fiber or high-strength high-elastic fiber fabric or normal fiber fabric with high-strength high elastic fiber fabric for reduced shock absorption buffer. The present invention relates to an invention in which a plurality of small ceramic hemispheres are used in a multi-layered multilayered manner.

Of course, the hemisphere may be a partial layer as a sphere and a remaining layer as a hemisphere. However, if all the spheres are used, the number of layers should be smaller than that of the hemisphere, and the effect when one sphere is ruptured by bullets will have a somewhat less effective effect on defense than two hemispheres. Since there is a problem, it is not preferable to make all the spheres a sphere.

As shown in FIGS. 3 and 4, the hemisphere has a spherical surface where the initial collision surface of the hemisphere and the bullet or gun shell of the super-rigid material is spherical. Absorb some of the kinetic energy. Since the bullet continues to collide with adjacent hemispheres, the refraction reflex motion is inevitably repeated, and thus the kinetic energy is continuously reduced, thereby reducing or eliminating the effect of the direct hit. Only when the attacking target (gun / shell) strikes at right angles to the right center of the medium (semiconductor) composed of a plurality of stacks, the bullet penetrates the shortest distance. (The thickness of this center point should therefore be equal to the thickness of the polygonal flat bulletproof structure using homogeneous materials in the past.)

In all cases that deviate from the above cases, that is, when the hemisphere does not hit the center of the hemisphere or is out of the right angle, the attack (gun / shell) first crosses the hemispherical sphere. After losing significant propulsion due to mechanical buffers from side collisions rather than angle tilts and frontal collisions, they collide with the next new hemisphere that changes angles and meets again, ie rather than penetrating rather than penetrating. The driving force will be consumed.

The above-mentioned principle does not mean that the defensive structure does not prevent the attack from being damaged, but it does not mean that the deflection of the attack structure is effectively lowered or stopped at the minimum or to what extent the defensive structure is damaged. have.

In addition, the high elastic synthetic rubber filled between the hemisphere material and the hemisphere material used to fix the hemispherical material of the super-rigid material is a physical property of the material in the process of collision of bullets or fragments with the ballistic structure, It acts as a cushion to increase kinetic energy.

Since the super-rigid material used in the present invention is about 3.5 or less in specific gravity, the weight is reduced to less than 1/2 by the difference in specific gravity of the material compared to steel products, and also the high elastic synthetic rubber is half of the filler and the super rigid material. Since it is used as a fixing material of the sphere has a flexibility that is difficult to expect in the conventional bulletproof structure, it is easy to wear in the case of personal use, the deformation of the upper, lower, left, right direction after the wearing of the structure according to the human body form is easy to wear Significant mitigation of behavioral constraints can be expected, which can reduce weight and increase mobility of allergic wearers. Securing the flexibility of the bulletproof structure also has a close effect on the body can be more appropriate to protect lives.

In particular, the personal bulletproof structure is limited by its weight, wearability, etc., thereby limiting the thickness of the laminate. As a result, weak areas are inevitably generated.

The most recent prior art is a laminate of polygonal ceramic plates in the form of honeycomb (figure 1 (c)). The gap between the ceramic piece and the piece forms a dangerous bulletproof fragility line. Therefore, in order to prevent this and enhance the bulletproof effect, double stacking is impossible first of all by using an external physical force, thereby preventing the bulletproof ability and forming a bulletproof fragility line at every seam. In addition, since the initial collision surface of bullets and guns is flat, it accepts all the impacts of the direct attack bombs and causes destruction of the ceramic plate.

The present invention solves the above-mentioned drawbacks, and in particular, by stacking hemispheres of super-rigid materials in order to avoid the drawbacks of the formation of bulletproof fragile lines of seams and the destruction caused by absorbing the total amount of impact due to the plane exposure of the direct bomb. As described above, the bulletproof ballistic weak spots are shown as points as well as the refractive reflection and energy reduction of the direct ballistic trajectory.

라 할때(구 또는 정6면체의 직경 또는 한변의 높이를 h라 할때) 반구 2개의 높이를 가진 2층 높이의 (h) 정6면체의 경우 그 부피는 h³이겠으나 제5도에서 도시된 바와같이 반구 3개의 높이를 가진 3층 적재일 경우 그 부피는

약 0.785h³이다. 즉, 부피는 반구 3개의 높이로도 반구 2개 높이의 정6면체에 비하여 78.5%로서 적은 용적을 가지고도 취약점(5)을 제외하고는 직격탄에 대한 방어높이는 제5도의 Z의 경우를 제외하고는 모두 같거나(Z') 또는 그이상(Z", X, Y, W)이 되는 것이다. 즉, 본원 발명은 반구로 하는 것이 가장 효율적임을 알수 있다 하겠다.The hemisphere has a minimum volume for the same height (or radius) compared to other cubes or other polygons, since its exposed surface is spherical, so it is the lightest in volumetric efficiency and its central part can have the same height. As well as having a refraction effect of the trajectory of the bullet to have a reflection angle according to the angle of incidence of the bullet can have a very safe effect. Also, even if the efficiency for the same weight (volume) is seen, the height of the hemisphere

(H) if the diameter of a sphere or a cube or the height of one side is h, for a two-story (h) cube with two hemispheres, the volume will be h ^3, but shown in FIG. As shown, for a three-story stack with three hemispheres, the volume is

About 0.785 h ³ . In other words, the volume of the hemisphere is 38.5 hemispheres compared to the hemispheres 2 hemispheres and 78.5% of the volume, even if the volume is small, except for the weakness (5), except for the case of Z in the fifth degree Are all the same (Z ') or more than (Z ", X, Y, W). That is, it will be understood that the present invention is most efficient in the hemisphere.

As described above, the bulletproof structure of the present invention laminates ceramic hemispheres sequentially on the above-described base portion, and in one-layer lamination, the space 6 between each hemisphere is filled with an elastic filter such as synthetic rubber having elasticity. The hemisphere can be filled by the mold with high elasticity in accordance with the concave groove of the mold. Also, as shown in (a) of FIG. (4) can be simply charged and solidified to form a layer.

According to any method of the present invention, the present invention includes an elastic material such as a synthetic rubber filled with a space between the ceramic hemispheres and the hemispheres, and a base part including flexible high-strength fibrous tissues while acting as a shock absorber and absorber. The third party to defend against shooting. The ceramic hemispheres described above are always easy to repair and replace, unlike the sewn fabrics, because the broken parts can be repaired by adhesives when they are broken by the bullet.

In the case of laminating ceramic hemispheres as in the present invention, the fragile portion gradually appears as shown in Fig. 5, but in the case of Fig. 1 (c), a honeycomb-shaped tetrahedron is shown. Since it appears as a weak line (5 '), there are quite a large number and wide distribution of vulnerable parts, which leads to a very bad result. Moreover, when the weak part is made by the line, brittleness increases because it is also affected by the impact of the shooting unlike the point. In order to compare and examine this, Example 1 will be described.

Example 1

Table 1 shows the results of performance tests comparing the ceramic hemispheres with other forms, such as hexagonal (hexagonal) or racktangular (quadgonal), when not using the ceramic hemisphere. The physical properties of the ceramics used here include specific gravity 3.60, compressive strength 358,000 Psi, cut strength 49,000 Psi, hardness 80 (R 45N), elasticity 41 × 10 ⁶ Psi, protection 2525 ft / sec, or about 760 m / sec Speed) was used.

TABLE 1

The present invention is not to say when using any type of bulletproof structure other than the use of hemispheres or epicenters, and the rubber buffer is doubled because the lamination is doubled when using the hemispheres than when using a full circle. The angle of breakage at breakdown and the angle property and organization of the breakage of the second shell are different, and are more resistant than the "ball" form mentioned in the former. In other words, bullets must break through high-strength high-elastic hemispheres, such as multilayer ceramics, to improve ballistic effectiveness over single-layered bodies of the same thickness. The anti-ballistic effect is improved and the weakness of the joint line (line), which is established in any form of square plate, is represented as a dot in FIG. In addition, since the initial contact surface with the warhead is a spherical surface, it is possible to induce a change in the ballistic direction, thereby canceling or reducing the effect of the direct hit. In other words, compared to the "flat plate" type, before the bullet hits the true center point of the "ball" at right angles, it will force the phenomenon that all the slides will be deflected and tilted at various angles. will be.

Compared to the plate type, the “semi-spherical” in the same volume reduces the volume (weight) by half and instead enhances the buffering role by filling the “rubber adhesive”. When molded with a flexible rubber-and-adhesive, the flexibility is possible "both longitudinally" and "laterally", in which case it does not exhibit vulnerability or "line". It is easy to install anywhere on flat or curved surfaces (such as military helmets). Compared with the "ball" form, it is easy to manufacture and has high productivity and economy.

Claims (2)

In the ballistic structure, a ceramic hemisphere is laminated on a base portion including a high elastic high strength fiber fabric, and a space for the bulletproof structure is filled with an elastic material such as synthetic rubber in the space between the ceramic hemispheres. The ballistic structure of claim 1, wherein the structure is always partially repairable or replaceable.

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