Accession Number : AD0472321

Title :   PLASTICS OBTURATOR FOR 105MM COMBUSTIBLE CARTRIDGE CASE.

Descriptive Note : Final technical rept. 8 Nov 60-Jul 65,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Prosen, Stanley P. ; Johnson, Walter T.

Report Date : 22 JUL 1965

Pagination or Media Count : 26

Abstract : 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)

Descriptors :   (*CARTRIDGE CASES, OBTURATION(BALLISTICS)), (*OBTURATION(BALLISTICS), PLASTICS), GUNS, POLYETHYLENE PLASTICS, FIRING TESTS(ORDNANCE), PRESSURE, TEMPERATURE, STRESSES, MOLDINGS, ANISOTROPY, STABILITY, MONITORS, PERFORMANCE(ENGINEERING), STORAGE, HANDLING, COMBUSTION.

Distribution Statement : APPROVED FOR PUBLIC RELEASE