METHOD OF PRODUCING GUN POWDER WITH MINIMUM WEB THICKNESS FOR SMALL ARMS CARTRIDGES AND SPECIAL-PURPOSE ONES Russian patent published in 2017 - IPC C06B21/00 C06B25/18 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to production of gun powders, which can be used for charging cartridges for small arms, as well as special-purpose cartridges, for example, construction and industrial cartridges. Method of producing a gun powder with the minimum web thickness comprises production of powder elements with the size of not more than 0.7 mm their preliminary drying to the humidity of not more than 15 %, coating the powder elements with a current-conducting material, rolling the powder elements into plates with the thickness of not more than 0.18 mm on hot rolls, the temperature of which is not more than 100 °C, final drying and averaging of physical and chemical characteristics by blending. At the stage of coating the powder elements may be treated with flame arresters, for example, sulphates of alkali or alkali-earth metals. To obtain elite types of powders after rolling fractionation of the powder elements is performed. To improve quality of powders with the minimum web thickness after the fractionation stage repeated is rolling the coarse fraction of powder particles on the rolls. Obtained gun powders have improved ballistic and operating characteristics of a gun powder with the minimum web thickness due to thermal plasticization of cellulose nitrates forming a mechanical frame of the powder elements at rolling with preliminary coating the powder elements.

EFFECT: method ensures uniformity of gun powders with the minimum web thickness regardless of the used raw materials or recycled powders, versatility and process safety of the powders production for any small arms cartridges, including their elite types.

6 cl, 1 tbl, 6 ex