DE1175116B - Bullet, especially bullet for shooting at short distances - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: F07f

Number:
File number:
Registration date:
Display day:

German class: 72 d-15/01

1175 116
G 22630 Ic / 72 d
July 25, 1957
June 30, 1964

The invention relates to a projectile, in particular to a bullet for short shooting Distances, which from a mixture of powder of suitable density, preferably metal powder, with a plastic binder. Such projectiles are used for shooting at close targets, such as this is the case, for example, in shooting galleries, used and by means of any firearms, such as. B. Firearms, air rifles or the like, shot. Here, however, the particular problem arises that such a projectile on the one hand when it strikes an unyielding surface with avoidance the formation of splinters in finest and inelastic parts must disintegrate, while on the other hand, despite the relatively low driving energy, work with the firearms used for such purposes, both the accuracy of the projectile according to the invention must correspond to those of conventional lead projectiles as well as ao the disintegration of the projectile only after the clean, a perfect determination of the hit result permitting penetration of the cardboard target.

The known bullets of this type, which in one case consist of a mixture of moist plastic Material, such as clay and coarse iron filings, and in the other case from a mixture of beeswax, "Mutton fat and barium sulfate do not meet these requirements The projectile consisting of a mixture of clay and iron filings is already activated when leaving the barrel blasted apart, whereby a use for target shooting is excluded and itself In addition, when shooting at short distances, there is a danger to the shooter or bystanders can hardly be avoided. The bullet made up of mutton fat, beeswax and barium sulfate on the other hand is of such great plasticity or softness that it can penetrate the target is not guaranteed and the projectile on its impact on an unyielding surface on this sticks instead of disintegrating into tiny particles. They also have a certain elasticity Bullets not proven, as there is a lot of driving energy to drive the bullet out from the run is required and, on the other hand, gross target deviations after leaving the run as a result an elastic recovery occur; Due to their elasticity, such projectiles also tend to form from bystanders endangering fragments.

Projectile, especially bullet for shooting
at short distances

Applicant:

Gevelot S. A., Paris

Representative:

Dr.-Ing. W. Stuhlmann, patent attorney,

Bochum, Bergstrasse 159

Claimed priority:

France of April 26, 1957 (737 322)

The projectile according to dei? Invention avoids these disadvantages and is characterized in that the Mixture of the powder and polyethylene as a binder, an organic, halogenated substance, preferably chlorinated paraffin, is added. This has completely surprisingly achieved that in the normal state with the fingernail not scratchable, in addition to a horn-like toughness -bzw. elastic flexibility in itself only a comparatively low plasticity possessing polyethylene in a plastic mass is transformed, which is deformed like lead with loss of any elasticity can. Since the polyethylene, however, extends over a large area for plastics Has temperature resistance, this plastic state remains unlike clay and others Maintain moist, plastic materials even in the event of the temperatures occurring during excessive ignition. A Another advantage that the use of polyethylene as a binder with regard to the desired Bringing splinterless disintegration with it is the fact that this plastic is out of the series of Thermoplastics has a 25% minimum proportion of amorphous structural components. Also owns Polyethylene has a good coefficient of friction.

The projectile according to the invention fits due to its high plasticity of the inner surface of the Laufs excellent and presses itself easily into trains provided in this, whereby because of the the rotary movement imparted to the projectile, the accuracy of the hit is significantly improved. The lubricity the bullet in the barrel is considerably improved over the known bullets; a

409 638/63

Jamming or sticking does not occur. Due to the favorable plastic behavior, the Manufacturing tolerance of the projectile according to the invention be 0.2 to 0.3 mm, so that the shooting result a used firearm is just as good as a new one. The for shooting the invention Projectile required propulsion energy is compared to that for the previously known comparable storeys much lower. Although the projectile according to the invention is considerable!. ·> Can be exposed to deformation forces, it still disintegrates when it hits an unyielding one Area completely free of splinters, the main reason for which is to be seen in the fact that the overpass of polyethylene in the plastic state and the associated abolition of the crystallization forces the already existing proportion of amorphous structural components is increased.

In addition to chlorinated paraffin, as an organic halogenated additive z. B. also chlorinated Naphthalene can be used. Here it has according to a further feature of the invention as It has proven advantageous that the proportion of additive corresponds approximately to that of binder. By such a By metering the additive, the plasticity can be adjusted to a particularly favorable value.

The production of a projectile according to the invention is explained below, for example:

Iron powder is mixed with equal parts polyethylene and chlorinated paraffin contains, intimately mixed or coated with such a mixture. The caking of this mixture is produced after it has been formed in a manner known per se by placing it in an oven, in the event that the plastic material chosen as the binding agent is polyethylene, the furnace opens a temperature above 120 ° C is set.

Here, the iron powder, which is encased in the plastic material, is compressed in such a way that the bullet has a high porosity. The volume fraction of the pores can be 40% of the total volume of the floor.

For this purpose, the shape intended for the formation of the bullet is provided with an internal volume provided, which is greater than the volume that the projectile without pores in compact caked Would own shape. Since the starting material is very porous, you get - if this is mixed in a homogeneous way - in the finished projectile body a number from good to its mass distributed pores.

This configuration of the projectile makes it deformable for the purpose of pressing it in in the trains still improved so that it does not need to be provided with a knurled border, as is the case with conventional bullets. It also improves the plasticity of the Projectile body supported and its splinter-free disintegration on impact with an unyielding surface favored.

The projectile according to the invention can be shot in any way, for. B. by means of a powder charge or by means of a weapon that works without a propellant charge, e.g. B. with a compressed air rifle, or by simply relaxing a suitable elastic device.

Claims (2)

Patent claims: 1. Projectile, especially bullet for shooting at short distances, consisting of a mixture of powder of suitable density, preferably metal powder, with a plastic binder, characterized in that the mixture of the powder and polyethylene is an organic, halogenated binder Substance, preferably chlorinated paraffin, is added. 2. Projectile according to claim 1, characterized in that the proportion of additive is about the corresponds to binder. Considered publications:
German Patent Nos. 190 581, 79 371;
French Patent No. 403,910;
U.S. Patent No. 2,315,853. 409 638/63 7.64 © Bundesdruckerei Berlin