ARMOURING METHOD OF INSERTABLE SOLID-PROPELLANT CHARGE WITH EPOXY ARMOUR COMPOUND ALONG SIDE SURFACE, AND METHOD FOR DETERMINING EPOXY ARMOUR COMPOUND VISCOSITY Russian patent published in 2012 - IPC F02K9/10 G01N11/00 

FIELD: blasting operations.

SUBSTANCE: when armouring the insertable solid-propellant charge with epoxy armour compound on side surface of cartridge, conical cavities with depth of 1.0…2.0 mm and surface area of 0.5…3.0 mm² and at the distance between conical cavities of not less than 3 mm are made. Surface of conical cavities is degreased, cavities are filled with epoxy armour compound by means of a gun, pipette or small-size "spear" and polymerised at temperature of 15…35°C. When determining epoxy armour compound viscosity, 10 concentric circles with diameter of 6…60 mm and with a pitch of 6 mm are applied to a piece of paper. The above piece of paper with the applied circles is placed on levelled horizontal support and covered with a transparent glass plate. On the above glass plate, to the centre of concentric circles there placed is charge 0.5±0.1 g of epoxy armour compound; after that, it is covered with the second transparent glass plate with dimensions of 65×65×3 mm and load with mass of 100 g is installed on it. The above load is removed in 1 minute, and No. of circle of the largest diameter, which was reached or overlapped with the epoxy armour compound when it was spreading, is assumed as viscosity of epoxy armour compound.

EFFECT: inventions allow improving reliability of solid-propellant charge due to improving the quality of its armour coating.

2 cl, 5 dwg