US 2021/0395162 A1 · APPARATUS AND METHOD FOR MANUFACTURING PROPELLANT

Abstract

A propellant manufacturing method for manufacturing a propellant including a propellant grain having a first surface on which combustion starts upon ignition and a second surface to be coupled to a wall surface that prevents combustion. The manufacturing method includes placing a portion of first propellant having a first burning rate in a first space containing a first position on the second surface; and placing a portion of second propellant having a second burning rate higher than the first burning rate in a second space containing a second position on the first propellant. The method further includes placing a portion of third propellant having a third burning rate higher than the second burning rate in a third space containing a third position on the first propellant. The method further includes completing the propellant grain by simultaneously hardening the entireties of the first propellant, the second propellant, and the third propellant.

Claims12

Dependent claims

A manufacturing method for a propellant which comprises a propellant grain having a first surface on which combustion starts upon ignition and a second surface to be coupled to a wall surface that prevents the combustion, placing a portion of first propellant having a first burning rate in a first space containing a first position on the second surface;

placing a portion of second propellant having a second burning rate higher than the first burning rate in a second space containing a second position on the first propellant;
placing a portion of third propellant having a third burning rate higher than the second burning rate in a third space containing a third position on the first surface;
and
completing the propellant grain by simultaneously and completely hardening entireties of the first propellant, the second propellant, and the third propellant.

1 more element

A propellant manufacturing apparatus for manufacturing a propellant grain having a first surface on which combustion starts upon ignition and a second surface to be coupled to a wall surface that prevents the combustion, the propellant manufacturing apparatus comprising:

a support device configured to support the wall surface;
a propellant supplying device configured to supply unhardened propellants;
a head configured to eject the unhardened propellants;
a head moving device configured to move the head to adjust a position of the head with respect to the wall surface;
and
a control device configured to control the support device, the head, and the head moving device,
wherein the head is configured to:
place first propellant contained in the unhardened propellants in a space containing a position on the wall surface;
and
place second propellant and third propellant contained in the unhardened propellants in a space containing a predetermined position under control of the control device, the second propellant having a burning rate different from that of the first propellant, the third propellant having a burning rate different from those of the first propellant and the second propellant, and
wherein the propellant manufacturing apparatus further comprises a hardening device configured to complete the propellant grain by simultaneously and completely hardening entireties of the first propellant, the second propellant, and the third propellant.

8 more elements

Dependencies are inferred from the claim text.

Apparatus and method for manufacturing propellant

Life of this patent

Apparatus and method for manufacturing propellant

Life of this patent

Abstract

Claims12