Metal injection molded projectile

Abstract

The present invention provides a molded metal ammunition projectile comprising: a metal composition injected into a molded to form a projectile comprising a nose extending essentially symmetrically to a shoulder; an essentially cylindrical bearing surface extending from the shoulder to a base.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]None.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates in general to the field of ammunition, specifically to compositions of matter and methods of making metal projectiles by metal injection molding.STATEMENT OF FEDERALLY FUNDED RESEARCH[0003]None.INCORPORATION-BY-REFERENCE OF MATERIALS FILED ON COMPACT DISC[0004]None.BACKGROUND OF THE INVENTION[0005]Without limiting the scope of the invention, its background is described in connection with projectiles made by injection molding for use in ammunition. Conventional ammunition projectiles for rifles and machine guns, as well as larger caliber weapons, are made from brass or lead that are machined, cast, molded or coated.[0006]For example, U.S. Patent Application Publication No. 2003 / 0101891 entitled, “Jacketed bullet and methods of making the same” discloses a jacketed firearms projectile having a jacket thickness less than approximately 0.025 inches thick are described, w...

AI Technical Summary

Benefits of technology

[0012]The metal composition includes stainless steel, brass, ceramic alloys, copper / cobalt / nickel / custom alloys, tungsten, tungsten carbide, carballoy, ferro-tungsten, titanium, copper, cobalt, nickel, uranium, depleted uranium, alumina oxide, zirconia and aluminum. More specifically, stainless steel, brass, metal alloys, ceramic alloys and even more specifically 102, 174, 201, 202, 300, 302, 303, 304, 308, 309, 316, 316L, 316Ti, 321, 405, 408, 409, 410, 415, 416, 416R, 420, 430, 439, 440, 446 or 601-665 grade stainless steel. The molded metal ammunition projectile may include 1, 2, 3, 4, 5 or more cannelures formed on an outer circumferential surface of the essentially cylindrical bearing surface intermediate the shoulder and the base. The nose may have a frustoconical shape, a frustoconical shape with a cavity to form a hollow point projectile; a spritzer shape; a blunted shape; or rounded shape. The molded metal ammunition projectile may be a full metal jacket, expanding full metal jacket, spritzer, jacketed spritzer, armor piercing, and armor piercing incendiary. The base has a flat shape or a boattail configuration. The molded metal ammunition projectile may include an outer coating placed over the projectile to form a metal jacketed projectile. The molded metal ammunition projectile may have a soft metal core, a high energy core, a high density core, a chemical core, or a combination thereof. The molded metal ammunition projectile may include a) 2-16% Ni; 10-20% Cr; 0-5% Mo; 0-0.6% C; 0-6.0% Cu; 0-0.5% Nb+Ta; 0-4.0% Mn; 0-2.0% Si and the balance Fe; b) 2-6% Ni; 13.5-19.5% Cr; 0-0.10% C; 1-7.0% Cu; 0.05-0.65% Nb+Ta; 0-3.0% Mn; 0-3.0% Si and the balance Fe; c) 3-5% Ni; 15.5-17.5% Cr; 0-0.07% C; 3-5.0% Cu; 0.15-0.45% Nb+Ta; 0-1.0% Mn; 0-1.0% Si and the balance Fe; d) 10-14% Ni; 16-18% Cr; 2-3% Mo; 0-0.03% C; 0-2% Mn; 0-1% Si and the balance Fe; e) 12-14% Cr; 0.15-0.4% C; 0-1% Mn; 0-1% Si and the balance Fe; f) 16-18% Cr; 0-0.05% C; 0-1% Mn; 0-1% Si and the balance Fe; g) 3-12% aluminum, 2-8% vanadium, 0.1-0.75% iron, 0.1-0.5% oxygen, and the remainder titanium; or h) about 6% aluminum, about 4% vanadium, about 0.25% iron, about 0.2% oxygen, and the remainder titanium.

Problems solved by technology

Shortcomings of the known methods of producing projectiles for ammunition include the limitation of materials that can be used to form projectiles and the lengthy time for manufacturing.

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