DE1099398B - Plastic blank cartridge - Google Patents

Description

GERMAN

It is known to manufacture blank cartridges entirely or partially from plastic.

In the production of such blank cartridges, relatively hard plastics are used because the insert highly plasticized plastics encounter difficulties. As a result of the relative brittleness of the harder plastics, these tend to break the material if a crack is present reproduces quickly.

With the plastic forrate part, as it is a blank cartridge, the powder gases should be the tip of the Break open the cartridge to pop out of the tip. The resulting break should, however remain localized and must not extend the full length of the cartridge. This should also be achieved if the plastic has hardened severely due to hypothermia. In the manufacture of small caliber Cartridges for the live shot have already been proposed, the projectile and the projectile case out to manufacture one piece, with the thinning of the wall thickness arranged on the floor surface of the projectile it is achieved that the projectile and the case when a certain pressure of the propellant gases is reached separated from each other. Usually, practice cartridges have a replica bullet / cartridge case at the transition a thickening of the wall thickness, which is given by the formation of the front end of the cartridge chamber, the projectile replica protrudes into the barrel.

It has now been found that the propagation of the break in blank cartridges made of plastic can be achieved Prevented conveniently placed notches, if these notches at the transition of the case to the projectile replica are appropriate. These notches represent a material weakening towards the advancement of the fracture groove is followed by a thickening of the material. This jump point in the material thickness stops the break and prevents the entire molded part from tearing open from top to bottom. Such a one Plastic blank cartridge has a cartridge case / bullet replica at the transition a wedge-like recess through which not only the wall-mounted blank cartridge made of plastic

Applicant:

Dynamit Nobel Aktiengesellschaft,
Troisdorf (district of Cologne)

Wilhelm Kirchner, Stadeln near Fürth,
Dipl.-Phys. Dieter Menzel, Fürth,

and Hans Umbach, Stadeln near Fürth,
have been named as inventors

strength of the cartridge case, but also that of the projectile replica is reduced.

Fig. I shows in section an example of an embodiment of such a plastic cartridge, namely at the transition between the projectile replica 1 and the cartridge case 2. The transition is provided with the notch 3, so that a jump point in the material thickness is formed here.

Fig. II shows the projectile replica 1 and the cartridge case 2 with the notch 3 on the inside.

Claims (1)

Claim ·. Blank cartridge made of plastic, characterized in that it is at the transition from the cartridge case to the projectile replica has a wedge-like recess through which not only the wall thickness of the cartridge case, but also the the projectile replica is reduced.