초록 ▼

A molded explosive member having mating means molded along the periphery to permit interlocking of adjacent members is disclosed. The molded member from an explosive material comprising a mixture of from 30 to 70 wt. % pentaerythritol tetranitrate (PETN) powder, about 1 wt. % graphite, and 70 to 30

A molded explosive member having mating means molded along the periphery to permit interlocking of adjacent members is disclosed. The molded member from an explosive material comprising a mixture of from 30 to 70 wt. % pentaerythritol tetranitrate (PETN) powder, about 1 wt. % graphite, and 70 to 30 wt. % foamable polystyrene beads heated in a closed mold, in the absence of moisture in contact with the PETN powder, graphite, and polystyrene beads, to a temperature of from about 90°to 104°C. to foam the polystyrene beads and mold the explosive material into the desired shape. The amount of PETN powder in the mixture is varied to adjust the desired amount of pressure generated during detonation of the molded explosive member.

대표청구항 ▼

A method of dry molding a molded explosive member having mating means molded along the periphery to permit interlocking of adjacent members which comprises: (a) forming a dry explosive mixture comprising: (1) from 30 to 70 wt. % pentaerythritol tetranitrate (PETN) powder having a particle size range

A method of dry molding a molded explosive member having mating means molded along the periphery to permit interlocking of adjacent members which comprises: (a) forming a dry explosive mixture comprising: (1) from 30 to 70 wt. % pentaerythritol tetranitrate (PETN) powder having a particle size range of from about 0.025 millimeters to 0.075 millimeters; (2) about 1 wt. % graphite; and (3) 70 to 30 wt. % foamable polystyrene beads having a particle size range of from about 0.10 to 1.25 millimeters comprising a mixture of about 30 wt. % expandable beads having a puffing agent previously incorporated therein but which have not been already prepuffed, about 50 wt. % prepuffed beads having a puffing agent previously incorporated therein, and about 20 wt. % of unexpandable beads; and (b) heating said dry mixture in a sealed mold, in the absence of moisture in contact with said PETN powder, graphite, and polystyrene beads, at a temperature of from about 95°to 100°C. by immersing said sealed mold in water boiling at standard pressure to foam said polystyrene beads and mold the explosive material into the desired shape.