EXTENDED SHAPED CHARGE Russian patent published in 1998 - IPC

FIELD: plastic metal working, applicable in cutting of thin-walled metalworks by blasting. SUBSTANCE: metal body 1 indestructible at blasting has groove 3 and longitudinal flute 6. Groove 3 accommodates explosive charge 2. The groove and explosive charge have a V-shaped cross section. The explosive charge has longitudinal segmental shaped recess 4 lined by metal foil 5. The diameter of the shaped recess is at least 1/2•cos(α) of the value of the wedge base, where α - wedge angle. The wedge may be made with a truncated upper base, not less than the value of critical diameter of the used explosive type. EFFECT: enhanced efficiency. 2 cl, 2 dwg