Igniter capsules are products with a rigid, usually metal shell, designed to transmit an explosive or igniter pulse to a distance. Cartridge-type igniter caps are intended for ignition of powder-shotgun weapons. According to the principle of action, they can be shock, grater and electric (elektrozapali).
Igniter capsules, purpose, varieties, device, composition of igniter capsules.
At the same time, igniter capsules can be used independently in small arms cartridges and mortar shots, or they enter the device of more complex assemblies in capsule and electrocapsule bushings, shock and exhaust tubes.
Pipe igniters are used in explosive devices (detonators) of ammunition to actuate explosive explosive charge circuits. According to the principle of action, these capsules can be punctured and electric.
Igniter capsules create an impulse in the form of a flame beam, which is used to ignite propellant (powder) charges, and in fuses to actuate explosive charge explosive circuits. Cartridge percussion and tube capsule igniter caps have essentially the same device.
Arrangement of cartridge percussion igniter caps.
Arrangement of tube-mounted firing ignition caps.
The main elements of the capsule are the shell (cap), the igniter charge and coating. In the design of cartridge percussion capsules, there is additionally an anvil, about which the capsule composition breaks when the striker hits the bottom of the shell.
The shell of the igniter caps serves to accommodate the igniter composition. For cartridge capsules, it is made of brass (L-68), copper and sometimes iron, and for tubular copper. The wall thickness of the shell is from 0.15 to 0.13 mm.
As an igniter charge of the igniter caps, explosive-mercury-chlorate compounds are used, which are pressed into the cartridge and tube capsules under pressure. Such compositions are sufficiently sensitive to shock, storage racks, simple and cheap to manufacture.
Composition of primers.
The coating is used to seal the capsule composition and to protect against accidental exposure. Cartridge capsules have a coating in the form of a circle of tin foil; for tube capsules, the coating may be in the form of a circle or cup of the same material as the shell of only a smaller thickness (0.05-0.02 mm).
Cartridge capsules are designated by the type of weapon to which they are intended, for example: KVM-3 (primer-igniter launcher, 3rd sample). Tube capsules are usually indicated by the type of fuses to which they are applied (KTD, MD-5) or by numbers (No. 1, No. 3).
Based on the book Explosives and gunpowder.
A.N. Kalyazhenkov, D.P. Malgin.