A METHOD AND AN APPARATUS FOR MANUFACTURING THIN WEBBED SOLID PROPELLANT GRAINS FOR PROPELLANT MOTORS

摘要

A method of manufacturing thin webbed solid propellant grains for propellant motors is provided. A homogeneous propellant slurry containing known functionally temrinated liquid polymers and curing agents such as herein described is prepared. The slurry is subjected to a vacuum in a pressure casting chamber, and the vacuum is released and a freely moving diaphragm made of a light material is placed on the surface of the propellant slurry. A fluid pressure is applied by means of a gas which does not react with the propellant slurry and the slurry is cast into one or more propellant motor case(s) provided with a mandrel. The cast slurry is cured. An apparatus for manufacturing thin webbed solid propellant grain for propellant motors is also provided.