公开(公告)号：US11209255B1

公开(公告)日：2021-12-28

申请号：US17010933

申请日：2020-09-03

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： John Sequeira ,  Sean Swaszek

IPC: F42B33/02 ,  F42B33/00 ,  B65B3/34

Abstract: An improved process provides high-density pre-form billets that meet dimensional limitations required for case-load tooling. Previous isostatic fill procedures were improved in two ways to accommodate varying bulk densities or powder compositions. First, during the isostatic fill procedure, the powder fill is subject to both a high frequency vibration and a high amplitude, low frequency impulse. The combination of these two inputs is critical to ensure polymer bonded explosives pack to consistent densities. Second, unlike in conventional practices, the fill rate is kept constant throughout the entire fill process and the mold is completely filled by the time the required powder mass has been dispensed.