초록 ▼

A composite tank for containing liquid oxygen and the method of making the same wherein a water-soluble mandrel having the desired tank configuration and a cylindrical A method of making a composite tank for containing liquid oxygen configuration of the mandrel and an outer boss conforming to the co

A composite tank for containing liquid oxygen and the method of making the same wherein a water-soluble mandrel having the desired tank configuration and a cylindrical A method of making a composite tank for containing liquid oxygen configuration of the mandrel and an outer boss conforming to the configuration of the inner boss, the bosses each having a tubular portion for receiving the protuberance on the mandrel and a spherical portion. The mandrel and the bosses are first coated with a nickel coating. The mandrel is then wrapped with graphite fibers wetted with an epoxy resin and this resin is cured. A layer of insulating foam is then applied to the tank and cured. The insulating foam is machined to a desired configuration and a layer of aramid fibers wetted with a second epoxy resin is wrapped around the tank. The second resin is cured and the water soluble mandrel is washed from inside the tank.

대표청구항 ▼

[What is claimed is:] [1.]a. providing a mandrel having a desired tank configuration and having a cylindrical protuberance on at least one end of said mandrel;b. placing on said end of said mandrel a nickel plated inner boss having a configuration conforming to the said end of the mandrel;c. placing

[What is claimed is:] [1.]a. providing a mandrel having a desired tank configuration and having a cylindrical protuberance on at least one end of said mandrel;b. placing on said end of said mandrel a nickel plated inner boss having a configuration conforming to the said end of the mandrel;c. placing on the inner boss an outer boss having a configuration conforming to the configuration of the inner boss, the second boss being made up of graphite fibers embedded in a cured epoxy resin matrix;d. coating the mandrel and the bosses with nickel;e. wrapping the mandrel with a tow of graphite fibers wetted with a first epoxy resin;f. curing the first epoxy resin to form a layer of graphite fibers in an epoxy resin;g. applying a layer of insulation foam to the layer of graphite fibers;h. curing the layer of foam;i. machining the foam to a desired thickness;j. wrapping the foam layer with a tow of aramid fibers wetted with a second epoxy resin; andk. curing the second epoxy.