DE1146785B - Target practice ammunition made of thermoplastic material - Google Patents

Description

The invention relates to a target practice ammunition made of plastic, in which the cartridge case and the projectile are made in one piece and a predetermined breaking point between the projectile and cartridge case is arranged.

It is known to make infantry cartridges from metal, where the projectile and the projectile casing are made in one piece. The use of such Cartridges as target practice ammunition are ruled out for safety reasons. Also the later proposed Practice bullets can be produced using plastic or synthetic resin molded material or training cartridges were by no means suitable for use as target training ammunition. That too Double-walled target training bullet, known for a long time, corresponded because of the numerous manufacturing processes no longer meets the requirements for simplicity and cheapness. Also target practice bullets made of plastic with a metallic tip have already been described. But through that Large number of manufacturing steps and the easy falling out of the metallic tip - conditional Due to the different coefficients of thermal expansion - this target practice ammunition could also be not enforce properly in practice.

It has now surprisingly been found that a simple target practice ammunition can also be made of plastic can produce which fully meets the practical requirements if one has the following structural measures taken into account: cartridge case and projectile are made from one piece, a predetermined breaking point is arranged between the projectile and the cartridge case and the projectile in the Projectile core having a cavity after the ground.

The thermoplastic plastic that can be used for the production of ammunition, especially polyethylene and polypropylene, has a density less than 1. The structural combination achieves both a low projectile weight and a safe detachment of the projectile from the cartridge and good stabilization of the projectile after the Leaving the gun barrel. So weighs z. B. a polyethylene bullet of the pistol cartridge caliber 9 mm Parabellum only 0.4 g, while the comparable metal bullet is 8 g heavy. Such a projectile has an initial speed of about 500 m / sec at a gas pressure of only 420 aiii, while the same metal projectile, on the other hand, has an initial speed of only 340 m / sec at a gas pressure of 2400 atm. Due to the high initial speed is target practice ammunition
made of thermoplastic material

Applicant:

Dynamit Nobel Aktiengesellschaft,
Troisdorf (district of Cologne)

Dipl.-Ing. Waldemar Maurer, Karlsruhe-Durlach,

Karl Koch and Emil Eisinger, Berghausen (Bad.),

have been named as inventors

the precision of the plastic target practice ammunition at short distances is very good. Because of the low Due to the weight, the projectile loses itself

a ₅ greater distances very quickly in energy and thus in speed. For example, the speed V ₁₂₅ in the case of a plastic bullet is only 320 m / sec. η

This inevitably results in a very rapidly falling trajectory of the projectile and, accordingly, one short flight distance. For example, the maximum flight range of a bullet caliber 9 mm Parabellum made of thermoplastic material about 100 m, while the same metal projectile has a maximum Has a flight range of about 1500 m,

For bullets caliber 7.65 mm Browning, the maximum flight range for the execution in thermoplastic material about 70 m, while the metal version flies about 1200 m.

The situation is similar for rifle cartridges, with a plastic pointed bullet 7.62 mm has a maximum flight range of about 300 m, while the distance when executed this metal bullet is about 4000 m.

From these numerical comparisons, the obvious advantage of the projectiles according to the invention for Target and practice shots at close range.

By creating a cavity in the floor after the floor, it is possible to reduce the propellant gas pressure Use improvement of the sealing of the projectile against the barrel wall. This achieves

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that the danger area when shooting with such cartridges can be kept much smaller than when shooting with cartridges that have a heavy metal projectile of the conventional type. Furthermore, this results in very significant simplifications with regard to the expansion of the corresponding Shooting range systems.

The drawing shows an exemplary embodiment for such a target training cartridge. Floor 1 and Cartridge case 2 are made from one piece of thermoplastic material. The predetermined breaking point 3 ensures a clean separation of the bullet from the cartridge case. The plastic bullet 1 is provided with a cavity 4, which extends from the bottom of the floor to the middle of the floor pulls out.

The invention is limited to the combination of the individual features known per se, and only these should be placed under protection for target ammunition.

Claims (2)

PATENT CLAIMS: 1. Target practice ammunition with a projectile made of thermoplastic material, characterized in that the cartridge case (2) and the projectile (1) are made in one piece, with a predetermined breaking point (3) being arranged between the projectile and the cartridge case and the projectile (1) has a cavity (4) in the projectile core after the floor. 2. Target practice ammunition according to claim 1, characterized in that for the manufacture The thermoplastic used in the projectile has a density of less than 1. Considered publications: German Patent Nos. 894370, 717471, 341991; German utility model No. 1762 925;
Austrian patent specification No. 52 236. 1 sheet of drawings