KR20040106196A - Biodegradable and disposable projectile of hand grenade for training, composed of a projectile body, a fuse insertion hole and paint - Google Patents

Abstract

PURPOSE: A biodegradable hand grenade for training is provided to prevent environmental pollution by combining earth with natural adhesive and pressing and heating the mixed materials, and to train efficiently without recovering. CONSTITUTION: A biodegradable hand grenade is composed of a projectile body(1), a fuse insertion hole(2) and paint(3) covering the surface of the projectile body. The projectile body is composed of earth of over 20 micrometers such as clay, diatomaceous earth, kaolin, white clay, alumina, silica, stone powder or calcium carbonate, and a natural adhesive including vegetable materials such as starch, rice, wheat powder, potato, dextrin, Arabic rubber, sodium alginate, casein, CMC or MC, animal glue or inorganic materials such as liquid sodium silicate. The biodegradable hand grenade is manufactured by mixing the earth and the natural adhesive and extruding the mixture with the high pressure press.

Description

Biodegradable Grenade Bullet Body {omitted}

The present invention relates to a carbon body for a training grenade, and more particularly, to provide a disposable training grenade body that is biodegradable in a short time with a low-cost natural affinity material. Training grenades are sometimes used interchangeably with the name training grenades ("practice grenades").

The practice grenade used in the conventional group is configured to use a fuse coupled to a body made of metal or plastic so that it can be used and recovered many times. However, the training ground using the training grenade has a disadvantage of avoiding the use of the training grenade because it is difficult to recover by the dense weeds. Therefore, there is an urgent need for a low-cost, pollution-free, biodegradable disposable grenade body that has not been developed yet.

An object of the present invention is to provide a pollution-free disposable grenade body for eliminating the disadvantages of the conventional practice grenade body as described above.

In order to achieve the above object, the present invention uses a natural affinity material as a base material, and in order to maintain a shape, using an adhesive of a natural material, they are sufficiently mixed at a suitable compounding ratio, compressed, molded, heated and cured at high pressure, and then moisture It is to produce a pollution-free disposable grenade to save as.

As a base material of nature-friendly materials, clay, which is easily collected from nature, is used, and as a natural adhesive, glue made by heating glue or flour, which is widely used in general furniture, is used.

1 is an illustration of a practice grenade bullet according to the present invention

<Explanation of symbols in drawings>

1. bullet body 2. fuse insert hole

3. paint painting

The present invention consists of the body part 1 of FIG. 1, the fuse insertion hole 2, and the paint 3 on the surface.

Naturally friendly base materials constituting the body part 1 include clay, diatomaceous earth, kaolin, clay, loess, clay, alumina, talc, silica, stone powder, calcium carbonate and the like, which are generally called soil. The finer the particles thereof, the better.

By classifying the natural friendly natural adhesive constituting the body part 1, all kinds of adhesives based on starch, rice, flour, potato, fine gum, dextrin, gum arabic, sodium alginate, casein, CMC and MC are possible. Glue is representative of animal, and inorganic adhesive is water glass (liquid sodium silicate).

The fuse insertion ball 2 can be manufactured with a hole size suitable for various combat grenade fuses or practice grenade fuses.

The surface paint 3 may use a blue paint of the same material as the paint used in the conventional combat grenade since the training grenade should have the same texture as the combat grenade.

The coal body part 1 mixes the soil and the natural adhesive and extrudes it in a high pressure press.

The pressure of the press is preferably 10 t, but may be 1 t or more.

The extrusion is integrally extruded.

Extruded carbon body should be cured at high temperature, 20 minutes at 150 ℃ is suitable, but it is possible to dry for a long time above room temperature.

The finished body should be kept protected from moisture before use. It is usually vacuum-packed with known waterproofing paints or water repellents or PE (polyethylene) or aluminum, which are used as waterproofing methods.

When describing the operation of the present invention in detail, when throwing at the training site by combining the grenade fuse generally used in the coal body (1), the present invention falls to one place of the training site and partly rupture due to the explosion of the fuse. The rupture fragments are scattered in the training ground and remain in the ground in the form of rupture fragments in the absence of moisture, and return to nature in the form of mud in case of rain or moisture. At this time, the glue included as a component of the adhesive is an animal protein component, so it is naturally decomposed by the microorganism in a short time, and the flour paste is also starch, so it is easily degraded by the microorganism. The natural degradation of glue and flour is readily explained because many examples are already known. Therefore, after using the present invention, no pollution component remains at the training ground.

Implementation (example)

1. Preparation

-Soil ---- 184 g

-Glue --- 2 g

-Flour paste-- 4 g

Water ------ 40 g

-Blue paint

-PE vacuum packing paper

2. Equipment

1000 cm 3 mixer

-15t press

-Grenade body-shaped mold

-Heating device and chamber of 100 l

Spray Paint Machine

-Vacuum packing machine

- Scale

3. Production process

Weigh 184 g of soil.

-Dissolve 2 g of glue in 20 g of water,

Dissolve 4 g of flour in 20 g of water.

-Put the preparation in a mixer, mix it evenly, and then put the mixture into a die of a carbon-shaped mold installed in a 15t press and extrude.

The extruded carbon bodies were placed in a chamber and heated to 150 ° C. for 20 minutes and then naturally cooled for 24 hours.

-Painted blue paint with a thickness of 10㎛ or more on the naturally cooled carbon body to complete the carbon body.

-Vacuum packing with PE and film using vacuum packing machine.

3. The properties of the finished carcass were measured as follows from the field test ruptured by combining physical properties and fuses.

Referring to the effects of the present invention configured as described above are as follows.

As a result of replacing the conventional practice grenades that the soldiers avoided during training due to the difficulty of recovery and the hassle, the price is low and the fragments remaining in the training site are naturally biodegradable and need to be recovered. As it disappeared, soldiers no longer hesitated to train and were greatly effective in preserving the environment.

Claims (1)

In the practice grenades, animal natural adhesives mainly composed of clay, diatomaceous earth, kaolin, white clay, loess, clay, alumina, talc, silica, stone, calcium carbonate, or the like, or one or two or more of which are combined Combined with one or two or more of natural vegetable adhesives based on starch, wheat flour, fine gum, dextrin, gum arabic, soda alginate, casein, CMC, MC, or inorganic adhesives based on water glass Exercise grenades for forming the carcass