RU2481548C1 - CHARGE FOR 9 mm PISTOL CARTRIDGE - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: charge consists of spherical powder particles with particle size of 0.2…0.4 mm. Charge is arranged in encapsulated case with a bullet. The charge is made with bulk density 0.580…0.980 kg/dm³ from particles including the mixture of nitrocellulose with nitrogen oxide content 213.0…214.0 ml NO/g and nitrocellulose with nitrogen oxide content 209.0…210.5 ml NO/g in ratio 1:1. The charge also includes 10.0…25.0 wt % of octogene, 0.4…1.0 wt % of diphenylamine, 0.3…0.8 wt % of technical carbon and graphite, 0.6…1.5 wt % of ethyl acetate, 0.2…0.8 wt % of moisture at the following mass ratio of particle fractions, %: 0.2…0.4 mm - not less than 80; less than 0.2 mm and more than 0.4 mm - not more than 20.

EFFECT: increasing bullet flight speed.

1 tbl, 1 dwg

Description

The invention relates to the field of development of charges for cartridges for small arms.

Known charge of spherical powder (TFP) patent SU 1813292 A3, according to which the powder charge is made with a bulk density of 0.62 ... 0.72 kg / dm ³ of particles with a size of 0.2 ... 0.4 mm, phlegmatized from the surface to the mass of the powder 2.0 ... 4.0 wt.% Dibutyl phthalate, graphitized from the surface of 0.2 ... 0.3 wt.% Graphite, with a moisture content of 0.2 ... 0.5 wt.%, In the following mass ratio of fractions,%:

0.2 ... 0.4 mm not less than 75 less than 0.2 mm and more than 0.4 mm no more than 25

The use of this charge in a 9 mm pistol cartridge does not provide the required ballistic characteristics for the speed of the bullet and for the pressure of the powder gases in the barrel of the gun.

As a prototype, the authors selected the issued application No. 201001367/11 (001892) dated 01/18/2010, according to which the charge for a 9 mm pistol cartridge, consisting of particles of spherical powder of size 0.2 ... 0.4 mm, placed in an encapsulated sleeve with a bullet, characterized in that the charge is made with a bulk density of 0.930 ... 1.120 kg / dm ³ of particles graphitized from the surface of 0.1 ... 0.3 wt.% graphite, with a moisture content of 0.2 ... 0.8 wt.% and ethyl acetate 0 , 6 ... 0.8 wt.%, In the following mass ratio of particle fractions,%:

0.2 ... 0.4 mm not less than 90 less than 0.2 mm and more than 0.4 mm no more than 10

The disadvantage of this charge is that it does not provide an increase in the flight speed of the bullet more than 465 m / s due to an increase in the pressure of the powder gases in the barrel of the weapon.

The aim of the invention is to increase the initial velocity of the bullet to 475 m / s.

This goal is achieved in that the powder charge for a 9 mm pistol cartridge consists of particles of spherical powder with a size of 0.2 ... 0.4 mm, placed in an encapsulated sleeve with a bullet, while the charge is made with a bulk density of 0.580 ... 0.980 kg / dm ³ of particles comprising a mixture of nitrocellulose with a nitric oxide content of 213.0 ... 214.0 ml NO / g and nitrocellulose with a nitric oxide content of 209.0 ... 210.5 ml NO / g in a ratio of 1: 1, 10.0 ... 25.0 wt.% HMX, 0.4 ... 1.0 wt.% diphenylamine, 0.3 ... 0.8 wt.% carbon black and graphite, 0.6 ... 1.5 wt.% ethyl acetate, 0.2 ... 0, 8 wt.% Moisture, when followed total mass ratio of fractions of particles,%:

0.2 ... 0.4 mm not less than 80 less than 0.2 mm and more than 0.4 mm no more than 20

View of the cartridge shown in the drawing.

The cartridge consists of a bullet 1 and a sleeve 2 with an igniter capsule 4, in which a charge of spherical powder 3 is placed.

The charge of the 9 mm pistol cartridge should provide the following ballistic characteristics: bullet weight - 5.1 ... 5.4 g; charge mass - not more than 0.5 g; the average speed of a bullet is 465 ... 475 m / s; the spread of the bullet’s flight speed is not more than 30 m / s; pressure of powder gases MPa: average - not more than 280.5; the largest - no more than 300; the difference between the highest and lowest pressure values of the powder gases is not more than 34.3.

The authors found that the developed charge of powder elements for a 9 mm pistol cartridge, consisting of 10.0 ... 25.0 wt.% HMX, a mixture of nitrocellulose with a nitric oxide content of 213.0 ... 214.0 ml NO / g and nitrocellulose with a content nitric oxide 209.0 ... 210.5 ml NO / g in a ratio of 1: 1, 0.4 ... 1.0 wt.% diphenylamine, 0.3 ... 0.8 wt.% carbon black and graphite, 0.6 ... 1.5 wt.% Ethyl acetate, 0.2 ... 0.8 wt.% Moisture, provides a 9 mm pistol to increase the speed of the bullet to 10 m / s while maintaining the specified pressure of the powder gases in the barrel of the weapon.

A decrease in the octogen in the powder charge of less than 10.0 wt.% Leads to a decrease in the flight speed of the bullet, and an increase in the octogen of more than 25.0 wt.% Leads to an increase in the pressure of the powder gases in the channel of the gun barrel.

A decrease in nitric oxide in a nitrocellulose mixture of less than 213.0 ml NO / g and less than 209.0 ml NO / g, respectively, leads to a decrease in the flight speed of the bullet, and an increase in nitrocellulose nitric oxide more than 214.0 ml NO / g and more than 210 5 ml of NO / g, respectively, leads to an increase in the pressure of powder gases in the barrel of the weapon.

Diphenylamine in the powder charge in the amount of 0.4 ... 1.0 wt.% Acts as a stabilizer of chemical resistance. A decrease in DPA of less than 0.4 wt.% Leads to a decrease in chemical resistance, and an increase in DPA of more than 1.0 wt.% Leads to a decrease in the energy of the powder charge.

Carbon black and graphite in an amount of 0.3 ... 0.8 wt.% Play the role of a combustion catalyst, improve the flowability of gunpowder and electrostatic characteristics. A decrease in carbon black and graphite of less than 0.3 wt.% Does not have a catalytic effect, and an increase in carbon black and graphite of more than 0.8 wt.% Leads to a decrease in the energy of gunpowder.

Ethyl acetate and moisture in the composition of gunpowder play the role of technological additives. A decrease in EA less than 0.6 wt.% And moisture less than 0.2 wt.% Is associated with technological difficulties and the danger of the process, and an increase in EA more than 1.5 wt.% And moisture more than 0.8 wt.% Leads to a decrease power of gunpowder.

A decrease in the bulk density of the powder charge of less than 0.580 kg / dm ³ leads to an increase in the pressure of the powder gases in the channel of the gun barrel, and an increase in the bulk density of more than 0.980 kg / dm ³ leads to a decrease in the flight speed of the bullet and incomplete combustion of the powder charge in the channel of the gun barrel.

In the powder charge, an SPP is used with the size of the powder elements with a diameter of 0.2 ... 0.4 mm — not less than 80 wt.%, The sum of the coarse and fine fractions — not more than 20 wt.%. A decrease in the fraction of powder elements less than 80 wt.% Leads to an increase in the pressure of the powder gases in the channel of the gun barrel, an increase in the amount of coarse and fine fractions of more than 20 wt.% Leads to an increase in the pressure of the powder gases in the channel of the gun barrel.

The table shows the characteristics developed by the authors of the TFP for a 9 mm sports pistol cartridge within the established boundary conditions (examples 1 ... 3) and outside the boundary conditions (examples 4, 5).

Powder charge characteristics for a 9 mm pistol cartridge The name of indicators Example (Ex. No. 1) Project No. 2 Project No. 3 Project No. 4 Project No. 5 The content of nitrocellulose in the powder elements of the powder charge, ml NO / g 213.0 213.5 214.0 212.1 214.5 Octogen content, wt.% 10.0 17.5 25.0 5,0 30,0 The content of DFA, wt.% 0.4 0.7 1,0 0.2 1,2 The content of carbon black and graphite, wt.% 0.3 0.55 0.8 0.1 1,0 The moisture content, wt.% 0.2 0.5 0.8 0.1 1,0 The content of ethyl acetate, wt.% 0.6 1.05 1,5 0.4 2.0 Bulk density, kg / dm ³ 0.580 0.780 0.980 0.560 0.840 Ballistic characteristics The mass of the powder charge, g 0.45 0.46 0.45 0.50 0.35 Bullet flight speed, m / s 466 470 475 410 350 The spread of the speed of the bullet, m / s eighteen twenty 22 21 thirty The pressure of the powder gases in the barrel of the weapon, MPa Average 266.3 269.1 270.1 270.6 280,1 The greatest 271.4 276.1 275.4 282.1 294.1 The difference between the highest and lowest values of the pressure of the powder gases 20.1 18.6 21.5 23.5 24.6

It can be seen from the table data that the powder charge developed by the authors for a 5.6 mm rifle sport-rifle cartridge of circular ignition with a bullet speed of 550 m / s within the boundary conditions (examples 1 ... 3) meets the specified requirements, and outside the boundary conditions ( examples 4, 5) the powder charge does not match both the speed of the bullet and the pressure of the powder gases in the barrel of the gun.

Claims (1)

The charge for a 9 mm pistol cartridge, consisting of particles of spherical powder with a size of 0.2 ... 0.4 mm, placed in an encapsulated sleeve with a bullet, characterized in that the charge is made with a bulk density of 0.580 ... 0.980 kg / dm ³ of particles comprising a mixture nitrocellulose with a nitric oxide content of 213.0 ... 214.0 ml NO / g and nitrocellulose with a nitric oxide content of 209.0 ... 210.5 ml NO / g in a ratio of 1: 1, 10.0 ... 25.0 wt.% HM , 0.4 ... 1.0 wt.% Diphenylamine, 0.3 ... 0.8 wt.% Carbon black and graphite, 0.6 ... 1.5 wt.% Ethyl acetate, 0.2 ... 0.8 wt.% moisture in the following mass ratio of fractions particles,%:
0.2 ... 0.4 mm not less than 80 less than 0.2 mm and more than 0.4 mm no more than 20