DE3602327A1 - ADDITIVE CUFF FOR LARGE-CALIBRED PROTECTIVE AMMUNITION TO PROTECT THE ARMON TUBE - Google Patents

Description

The invention relates to an additive sleeve for large-caliber Gun ammunition to protect the gun barrel, consisting of a coated textile fabric, according to the preamble of claim 1.

So-called additive sleeves are inserted into the cartridges to protect the pipes assembled. These consist of a fabric as a carrier, which with a Mixture of wax and titanium dioxide is coated.

When shot, the additive cuff burns, due to the melting and evaporating the wax ent a cooler layer on the tube wall ent that protects them from the hot and aggressive combustion gases.

It has now been shown that under the conditions of environmental testing at + 63 ° C a partial melting and run-off of the mixture occurs. The propellant powder is contaminated by the liquid wax and an undesirable desensitization effect.

This has the consequence that the gas pressure when firing, due to the slowed down Burning the powder, sinks.

The use of a wax with a higher melting point leads to the fact that the cuff burns incompletely and solid particles in the weapon tube remain. This puts the operating personnel at risk on the following shots.

From DE-PS 27 09 247 a method for ensuring a vorbe agreed lifespan of a gun barrel with a coating on the inside known wall.  

It is provided that at the inside wall of the gun barrel the manufacture of a coherent, abrasion-resistant, high-melting, low heat-conducting layer is applied.

By adding metal oxides (preferably titanium dioxide) this layer will be maintained in a thickness that is below that protects the pipe from heat damage. This procedure comes for the large-caliber cannon ammunition in question is not in question, because such coated pipes are not currently introduced and there are no approved propellant powders that match the ones above mentioned metal oxides are added.

The object of the invention is the mechanical inherent form the mixture so that the mixture at + 63 ° C. remains dimensionally stable.

The solution to this problem is the characterizing part of the claim refer to.

Advantageous further developments are specified in the subclaims.

The network formed according to the invention increases the viscosity of the Mix so strongly that the additive sleeve is in the critical Temperature range remains mechanically stable. Breaks when shot the network due to the strong mechanical load without further ado together. After the network is reversible, it turns out that the processing can be done easily with the usual devices and that the melting and burning behavior of the additive sleeve remains unaffected by the shot.

In the mixture according to claim 1 there is an addition of 5% cellulose nitrate before.

The mixture of TiO ₂ and wax is melted at a temperature of + 100 ° C and 5% cellulose nitrate is added.

After intensive mixing, the mass can be added in a suitable manner will wear.

This additive has the property of burning the pipe-protecting mixture to make cash and therefore has a more effective effect, at the same time safety factor, namely complete combustibility and therefore no chipping or flying parts in front of the Pipe. The addition also increases the energy balance or mixture.

Claims (2)

1. Additive sleeve for large-caliber gun ammunition to protect the weapon barrel, consisting of a coated textile fabric which is mounted in the form of a lining in a cartridge, the fabric being coated as a carrier for a mixture of wax and titanium dioxide, characterized in that that the mixture contains a thickener in the form of cellulose nitrate, which forms a stiffening three-dimensional network. 2. additive sleeve according to claim 1, characterized, that the mixture contains about 5% cellulose nitrate.