Method of manufacturing multi-layered propellant grains
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United States of America Patent
Stats
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Nov 24, 2020
Grant Date -
Oct 8, 2015
app pub date -
Jan 28, 2014
filing date -
Aug 16, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of manufacturing a multi-layered propellant grain is provided. The method of the present disclosure simplifies the setup necessary to produce multi-layered propellants by using industrial equipment that is more energy and space efficient than the machinery that is conventionally employed for such processes. The method comprises providing a first propellant formulation; providing a die configured to provide a structure having an outer shell and a hollow interior when material is extruded therethrough; extruding the first propellant formulation through said die, to produce a first propellant layer having an outer shell defining a hollow interior in the form channel having open ends; providing a second propellant formulation, said second propellant formulation being of low viscosity; injecting said second propellant formulation into said channel defined by said first propellant layer to form a second propellant layer disposed in said channel; and hardening said second propellant layer. The first and second propellant layers have different rates of burning.
First Claim
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Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B29C Class
- 59.74 % this patent is cited more than
- 5 Age
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