PLASTICS OBTURATOR FOR 105MM COMBUSTIBLE CARTRIDGE CASE.
Final technical rept. 8 Nov 60-Jul 65,
NAVAL ORDNANCE LAB WHITE OAK MD
Pagination or Media Count:
An obturator has been designed for the 105mm Combustible Cartridge Case for the T252 Gun. The obturator, injection molded of linear polyethylene, has performed satisfactorily in gun firing tests at all required temperatures and chamber pressure extremes. A method of molding the obturator has been developed which reduces considerably the number of rejects, the occurrence of stress cracks, and the tedency of the obturator to warp. A quality control procedure in which the molding parameters pressures, temperatures, and times are continually monitored is described. Author