Improved Thermoplastic Charge Technique of DNAN-Based Explosive for Warhead

To solve the problem of insufficient explosive charge shrinkage compensation in the warhead, raise the charge density and charge quantity, and optimize the detonation performance of the explosive, an improved thermoplastic charge technique of DNAN-based aluminized explosive for the warhead was proposed on the basis of the conventional thermoplastic charge technique of DNAN-based explosive. In this improved technique, the measures of ensuring the temperature of thermal insulation device, slowing down the charging speed, reducing the transport of explosives and the temperature gradient, prolonging the heat preservation time and redesigning the charge shrinkage compensation device were taken in order to improve the internal quality of warhead charge, reduce the defects and improve the safety of warhead. Comparative test of the conventional and improved techniques showed that the improved charge density of the warhead increased from 1.70 g/cm3 to 1.78 g/cm3, increasing by 4.71%. Both the charge quantity and the internal quality of charge were improved, which made up for the charge defects and restrained the generation of shrinkage cavities and voids. This improved thermoplastic charge technique is simple, practical and reliable.