Patent ID: 8689669
Filing Date: 2014-04-08
Classification: F42B

Abstract:
1. Method of producing fragment-forming casing or parts thereof created by detonation of the explosive charge contained in explosive warheads and of a type that entails sintering powder metal to produce a single-unit moulded part in which heavy metal balls or other individually produced fragmentation bodies are embedded, the moulded part in which the fragmentation bodies are embedded being produced in a two-stage powder compaction procedure followed by sintering of the compacted powder metal, the first powder compaction stage comprising an initial fixation of the location of the fragmentation bodies completely free from contact with each other in a template or fixture, where the fragmentation bodies only have limited contact with the fixture via their own limiting outer surface, after which those parts of the fragmentation bodies that are not in direct contact with the fixture are covered with, and the free space between the fragmentation bodies is filled completely with, powder metal, which is then compacted under high pressure to form a single body having its own material strength that binds the fragmentation bodies within itself and that allows the fixture to be removed, after which other parts of the fragmentation bodies now brought into view that had been obscured by the fixture are covered with a second quantity of powder metal which is compacted using a second pressure stage to form its own single body and unified with the first quantity of powder metal and then sintered by means of hot sintering to form a uniform metal body within which the fragmentation bodies lie distributed in a predefined pattern.