Abstract:

For the logic initiation network, the HMXbased plastic explosive was made as an extrusion-cast booster and filled up into linear channel in the way of repeated sections. The charge and explosion performances were studied from the particle size of HMX, the content of Viton A, and the sorts of plasticizer through the orthogonal test. The test results show that the extrusion-cast process in the experiment is fit for charge for the small grooved channel. The charge is compact and uniform. 97 percent of fine HMX is not fit for the charge. The shaping of extrusion-cast booster becomes bad in the case of binder being lower than 3 percent. The plasticization effects of plasticizers C2 and C3 are better. Under the premise of high enough HMX density, fine HMX being at a certain proportion of the whole HMX is the key to reliable booster. The extrusion-cast booster composing of 47.5 percent of E HMX, 47.5 percent of fine HMX, 5 percent of Viton A and 2 percent of plasticizer C3 is the best formula. The charge density is 1.44g/cm3. The average detonation velocity is 6959m/s in the grooved channel which is 1mm×1mm of section size. The linear critical diameter is 0.5mm.

Key words: explosion mechanics, grooved channel, extrusion-cast booster, extrusion cast technology, detonation velocity, charge density, critical diameter