RU2427560C2 - Method for obtaining ball powder for 30 carbine sports-hunting cartridge (7,62×33) - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: method for obtaining ball powder (BP) for sports-hunting cartridge 30 CARBINE (7.62×33) involves preparation of phlegmatising emulsion consisting of water 6…10 wt %, phlegmatising agents 1 wt %, where phlegmatising agent consists of centralite I 6.5…8.5 wt % and dinitrotoluene 1.8…2.5 wt % in relation to powder weight and hide glue 0.8…1.2 wt % in relation to water; phlegmatising emulsion is prepared at 75…85°C during 20…30 minutes with particle size of 300…800 mcm; but first, water 2.5…3.5 wt % in relation to powder weight is filled to reactor-phlegmatiser; powder, hide glue 0.8…1.2 wt % in relation to water is loaded during mixing in turbulent flow and mixture is heated to temperature of 92…98°C; then, phlegmatising emulsion is drained in one pass and phlegmatisation of powder is performed at temperature of 92…98°C during 50…70 minutes.

EFFECT: obtaining the required ballistic characteristics of ball powder for sports-hunting cartridge.

1 tbl, 5 ex

Description

The invention relates to the field of production of spherical powders (TFP) for small arms.

US patents [1, 2] propose methods for producing TFP for small arms, which include grinding fine-grained pyroxylin gunpowders (MZPP) in an aqueous medium, followed by dissolving them in a solvent, dispersing the powder varnish onto spherical particles and removing the solvent from them.

The disadvantage of these methods is the inability to obtain the TFP for the sports and hunting cartridge .30 CARBINE (7.62 × 33).

The closest technical solution is a method for producing spherical pyroxylin powder for 5.6 mm sporting rifle cartridge [3] (prototype), where for phlegmatization they take gunpowder with a bulk density of 0.620 ... 0.720 kg / dm ³ , phlegmatization is carried out in 3.0 ... 3 5 parts by weight water per 1 wt.h. particles at 90 ... 98 ° C for 25 ... 35 minutes with dibutyl phthalate, which is introduced with stirring in the form of 1.5 ... 3.5 wt.% aqueous emulsion in an amount of 2 ... 4% relative to the weight of the powder.

The disadvantage of this method is that when using 1Pl instead of pyroxylin as a raw material with a nitric oxide content of at least 213.0 ml NO / g of fine-grained pyroxylin non-phlegmatized gunpowders and ballistic gunpowders of the NBL or NPL grade with expired warranty periods of storage and TFP obtained on their basis phlegmatized according to well-known modes, the ballistic characteristics of the TFP do not meet the requirements of the sports and hunting cartridge .30 CARBINE (7.62 × 33).

The aim of the invention is to obtain the TFP for the sports and hunting cartridge .30 CARBINE (7.62 × 33) by phlegmatization of powder elements made from fine-grained, non-phlegmatized pyroxylin powders and ballistic powders containing up to 40 wt.% Nitroglycerin (NHz). It should be noted that all currently available TFPs contain no more than 14 wt.% NHz, which plays the role of both energy and plasticizing additives. It is known that TFP with an NHz content of more than 14 wt.% Cannot be phlegmatized due to the diffusion of the phlegmatizer deep into the powder elements during storage.

This goal is achieved by the fact that for the first time the authors proposed a method of phlegmatization of TFP with an NHz content of up to 40 wt.%, The essence of which is as follows: a phlegmatizing emulsion is prepared in the emulsifier, consisting of 6 ... 10 parts of water, 1 part of phlegmatizers, where the phlegmatizer consists of 6 , 5 ... 8.5 wt.% Centralite I (C I) and 1.8 ... 2.5 wt.% Dinitrotoluene (DNT) in relation to the mass of gunpowder and 0.8 ... 1.2 wt.% Glue glue in relation to water, a phlegmatizing emulsion is prepared at a temperature of 75 ... 85 ° C for 20 ... 30 minutes with a particle size of 300 ... 800 microns, first, 2.5 ... 3.5 parts of water with respect to the mass of gunpowder is poured into the reactor-phlegmatizer, with stirring in a turbulent stream, gunpowder is loaded, 0.8 ... 1.2 wt.% of glue with respect to water and the mixture is heated reaching a temperature of 92 ... 98 ° C, the phlegmatizing emulsion is poured in one go and the powder is phlegmatized at a temperature of 92 ... 98 ° C for 50 ... 70 minutes.

Examples of the method for producing the TFP for the sports and hunting cartridge .30 CARBINE (7.62 × 33) within the boundary conditions (examples 1 ... 3), as well as beyond them (examples 4, 5) are given in the table.

Example 1. In a reactor-phlegmatizer with a volume of 1.57 m ^3, 250 liters of water are poured, with stirring, 100 kg of TFP, 2.0 kg of glue (relative to water) are loaded, the contents of the reactor are heated to a temperature of 92 ° C. At the same time, a phlegmatizing emulsion is prepared in the emulsifier, consisting of 49.8 liters of water, 6.5 kg of CI, 1.8 kg of DNT and 0.39 kg of glue, heated to a temperature of 75 ° C for 20 minutes and poured into a reactor phlegmatizer in one step with a particle size of 300 ... 800 microns. Phlegmatization of gunpowder is carried out at a temperature of 92 ° C for 50 minutes. Technological modes, physico-chemical and ballistic characteristics of the TFP are shown in the table.

Example 2. 300 liters of water are poured into a phlegmatizer reactor with a volume of 1.57 m ³ , 100 kg of TFP and 2.7 kg of glue (relative to water) are loaded with stirring, the contents of the reactor are heated to a temperature of 96 ° C. At the same time, a phlegmatizing emulsion is prepared in the emulsifier, consisting of 77.2 liters of water, 7.5 kg CI, 2.15 kg of DNT and 0.77 kg of glue, heated to a temperature of 80 ° C for 25 minutes and poured into a reactor phlegmatizer in one step with a particle size of 300 ... 800 microns. Phlegmatization of gunpowder is carried out at a temperature of 96 ° C for 60 minutes. Technological modes, physico-chemical and ballistic characteristics of the TFP are shown in the table.

Example 3. 350 liters of water are poured into a phlegmatizer reactor with a volume of 1.57 m ³ , 100 kg of TFP and 3.5 kg of glue (relative to water) are loaded with stirring, the contents of the reactor are heated to a temperature of 98 ° C. At the same time, a phlegmatizing emulsion is prepared in the emulsifier, consisting of 110 liters of water, 8.5 kg CI, 2.5 kg of DNT and 1.32 kg of glue, is heated to a temperature of 85 ° C for 30 minutes and poured into a phlegmatizer one technique with a particle size of 300 ... 800 microns. Phlegmatization of gunpowder is carried out at a temperature of 98 ° C for 70 minutes. Technological modes, physico-chemical and ballistic characteristics of the TFP are shown in the table.

Technological modes, physico-chemical and ballistic characteristics of the TFP Name of indicator Example (Ex. 1) Project 2 Project 3 Project 4 Ex.5 The volume of the reactor phlegmatizer, m ³ 1,57 1,57 1,57 1,57 1,57 The amount of water, l 250 300 200 350 350 The number of TFP, kg one hundred one hundred one hundred one hundred one hundred The amount of glue, kg 2.0 2.7 3,5 1.8 4.0 The temperature of the mixture, ° C 92 96 98 90 98 The amount of water for the preparation of a phlegmatizing emulsion, l 49.8 77,2 110 thirty 110 The number of Ts I, kg 6.5 7.5 8.5 4,5 8.7 The amount of DNT, kg 1.8 2.15 2.5 1,6 3.0 The amount of glue, kg 0.39 0.77 1.32 0.2 1.4 The temperature of the phlegmatizing emulsion, ° C 75 80 85 70 87 The preparation time of the phlegmatizing emulsion, min twenty 25 thirty fifteen 40 Phlegmatization temperature TFP, ° C 92 96 98 90 98 The time of phlegmatization TFP, min fifty 60 70 40 75 Bulk density, kg / dm ³ 0.926 0.936 0.945 0.850 0.930 Chemical resistance, mmHg 25 25 25 25 25 Porosity,% 4.0 4,5 5,0 10 12 Ballistic characteristics Mass of charge, g 0.83 0.85 0.91 0.79 0.98 The average velocity of the bullet in the ballistic group, m / s 558 553 559 530 490 The difference between the largest and smallest values of the speed of the bullets, m / s 13 6 fifteen 38 40 The maximum pressure of the powder gases in the ballistic group, MPa average 221 233.2 258.8 269.6 230,4 the greatest 234.1 258.9 302 327.5 261.8

According to the technical conditions: the average velocity of the bullet in the ballistic group is at least 550 m / s; the difference between the highest and lowest values of the flight speed of bullets is not more than 35 m / s; maximum pressure of powder gases in the ballistic group: average no more than 264.7 MPa, the largest no more than 313.7 MPa.

From the results of the table it can be seen that according to the method developed by the authors (examples 1 ... 3), the obtained TFP provides the required ballistic characteristics in the sports and hunting cartridge .30 CARBINE (7.62 × 33). Outside of the boundary conditions (examples 4, 5), the ballistic indicators do not meet the requirements of the technical conditions for the TFP, designed for equipping a sports and hunting cartridge .30 CARBINE (7.62 × 33).

Literature

1. US patent No. 2843584.

2. US Patent No. 3378545.

3. RF patent No. 1808190 (C06B 21/00).

Claims (1)

A method of producing spherical powder for a sporting and hunting cartridge .30 CARBINE (7.62 × 33), including the formation of spherical particles of gunpowder, their phlegmatization and drying, characterized in that a phlegmatizing emulsion is prepared in the emulsifier, consisting of 6 ... 10 parts by weight water, 1 parts by weight phlegmatizers, where the phlegmatizer consists of 6.5 ... 8.5 wt.% centralite I and 1.8 ... 2.5 wt.% dinitrotoluene with respect to the mass of spherical powder and 0.8 ... 1.2 wt.% glue in relation to water, the phlegmatizing emulsion is prepared at a temperature of 75 ... 85 ° C for 20 ... 30 min with a particle size of 300 ... 800 microns, 2.5 ... 3.5 wt.h. are pre-poured into the phlegmatizer reactor. water with respect to the mass of spherical powder, with stirring in a turbulent stream, load spherical powder, 0.8 ... 1.2 wt.% glue with respect to water and heat the mixture to a temperature of 92 ... 98 ° C, drain the phlegmatizing emulsion into one dose and phlegmatize spherical powder at a temperature of 92 ... 98 ° C for 50 ... 70 min.