# US 11,079,209 B2 · Method of making polymer ammunition having a wicking texturing

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- Number: US 11,079,209 B2
- Document ID: US11079209B2
- Status: Granted
- Kind: B2
- Application number: 14/751,879
- Filed: 2015-06-26
- Published: 2016-01-07
- Granted: 2021-08-03
- Earliest claimed: 2010-11-10
- Assignees: True Velocity IP Holdings, LLC
- Applicants: True Velocity IP Holdings, LLC
- Inventors: Lonnie Burrow
- Web page: https://patentgrep.com/patent/US11079209B2

## CPC

- F42B 5/307: formed by assembling several elements
- B22F 3/004: {Filling molds with powder (feeding material to presses in general B30B15/302)}
- B22F 3/10: Sintering only
- B22F 3/225: {by injection molding}
- B22F 5/00: Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F 5/06: of threaded articles, e.g. nuts
- C04B 35/64: Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F})
- C22C 14/00: Alloys based on titanium
- C22C 33/0257: {characterised by the range of the alloying elements}
- C22C 33/0285: {with Cr, Co, or Ni having a minimum content higher than 5%}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/18: containing chromium
- C22C 38/42: with copper
- C22C 38/44: with molybdenum or tungsten
- C22C 38/48: with niobium or tantalum
- C22C 38/58: with more than 1.5% by weight of manganese
- F42B 5/02: Cartridges, i.e. cases with charge and missile
- F42B 5/025: {characterised by the dimension of the case or the missile}
- F42B 5/30: of plastics {, i.e. the cartridge-case tube is of plastics}
- F42B 33/00: Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor (F42B5/188 takes precedence; manufacturing processes for hollow charges F42B1/036; manufacture of blasting cartridge initiators F42B3/195)
- F42B 33/001: {Devices or processes for assembling ammunition, cartridges or cartridge elements from parts}
- F42B 33/02: Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges {(F42B33/004 takes precedence)}
- F42C 19/0807: {characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters}
- F42C 19/0823: {Primers or igniters for the initiation or the propellant charge in a cartridged ammunition (primers for caseless ammunition F42C19/085)}
- F42C 19/083: {characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap}
- B22F 3/1025: {not by heating only}
- B22F 2998/10: Processes characterised by the sequence of their steps
- F42B 5/313: all elements made of plastics
- F42B 33/04: Fitting or extracting primers in or from fuzes or charges {(F42B33/004 takes precedence)}
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F42C: AMMUNITION FUZES (blasting cartridge initiators F42B3/10; chemical aspects C06C); ARMING OR SAFETY MEANS THEREFOR (filling fuzes F42B33/02; fitting or extracting primers in or from fuzes F42B33/04; containers for fuzes F42B39/30)

## Abstract

One embodiment of the present invention provides a making a polymeric ammunition having wicking texturing about the projectile end.

## Claims

### Claim 1

A method of making a polymeric ammunition having wicking texturing comprising the steps of:
molding a primer insert by injection molding by injecting a feed stock into a primer insert injection mold, removing the primer insert from the primer insert injection mold wherein the primer insert comprising a top surface opposite a bottom surface and a coupling element that extends from the bottom surface, wherein the coupling element forms an outer surface opposite an inner circumferential surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture positioned in the primer recess to extend through the bottom surface, a primer flash aperture groove positioned in the primer recess around the primer flash aperture, and a locking groove that extends circumferentially about the top surface;
molding from a first polymer composition a polymer ammunition cartridge by overmolding a polymeric middle body having the primer insert at a first end and a polymeric coupling region at a second end, wherein the first polymer composition is overmolded and extends over an outer surface of the primer insert to the flange and extends over an interior surface of the coupling region to the primer flash hole aperture, wherein the first polymer composition extends from the polymeric coupling region to the primer flash hole aperture and to the primer flash aperture groove to form a flash hole;
texturing the polymeric coupling region;
inserting a diffuser into the primer recess;
inserting a primer into the primer recess;
forming a polymeric projectile end component from a second polymer composition, wherein the polymeric projectile end comprises a projectile end coupling region that extends to a shoulder region that reduces to a neck region having a projectile aperture;
texturing the projectile end coupling region;
texturing the projectile aperture about an inner surface of the neck to form a textured projectile aperture surface;
coupling the projectile end coupling region to the textured surface to form a propellant chamber that extends from the primer flash hole aperture to the projectile aperture;
filling at least partially the propellant chamber with a propellant;
fitting a projectile in the projectile aperture; and
applying an adhesive to the textured projectile aperture surface, wherein the textured projectile aperture surface provides wicking of the adhesive down the textured projectile aperture surface.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first polymer composition is the same as the second polymer composition.

### Claim 3 (depends on 1)

The method of claim 1, wherein the first polymer composition is a ductile polymer.

### Claim 4 (depends on 1)

The method of claim 1, wherein the first polymer composition, the second polymer composition or both comprise a nylon polymer.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first polymer composition, the second polymer composition or both comprise a fiber-reinforced polymeric composite.

### Claim 6 (depends on 1)

The method of claim 1, wherein the first polymer composition, the second polymer composition or both comprise between about 10 and about 70 wt % glass fiber fillers, mineral fillers, or mixtures thereof.

### Claim 7 (depends on 1)

The method of claim 1, wherein the bullet aperture comprises one or more cannelures formed on an inner circumferential surface of the bullet aperture.

### Claim 8 (depends on 1)

The method of claim 1, wherein the substantially cylindrical coupling region and the polymeric bullet-end coupling are welded or bonded together.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first polymer composition, the second polymer composition or both comprise polyurethane prepolymer, cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, nylon, polyether imide, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride or thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile butadiene-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, urethane hybrids, polyphenylsulfones, copolymers of polyphenylsulfones with polyethersulfones or polysulfones, copolymers of poly-phenylsulfones with siloxanes, blends of polyphenylsulfones with polysiloxanes, poly(etherimide-siloxane) copolymers, blends of polyetherimides and polysiloxanes, and blends of polyetherimides and poly(etherimide-siloxane) copolymers.

### Claim 10 (depends on 1)

The method of claim 1, further comprising one or more internal structures in the neck to support a bullet.

### Claim 11 (depends on 1)

The method of claim 1, wherein the bullet aperture comprises one, two, three, or more annular rings that mate with one, two, three, or more corresponding annular grooves positioned on a bullet.

### Claim 12 (depends on 1)

The method of claim 1, wherein the feed stock comprises one or more metals.

### Claim 13

A method of making a polymeric ammunition having wicking texturing comprising the steps of:
molding a primer insert by injection molding by injecting a feed stock into a primer insert injection mold, wherein the primer insert comprising a top surface opposite a bottom surface and a coupling element that extends from the bottom surface, wherein the coupling element forms an outer surface opposite an inner circumferential surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture positioned in the primer recess to extend through the bottom surface, a primer flash aperture groove positioned in the primer recess around the primer flash aperture, and a locking groove that extends circumferentially about the top surface;
molding from a first polymer composition a polymer ammunition cartridge by overmolding a polymeric middle body having the primer insert at a first end and a polymeric coupling region at a second end, wherein the first polymer composition is overmolded and extends over an outer surface of the primer insert to the flange and extends over an interior surface of the coupling region to the primer flash hole aperture, wherein the first polymer composition extends from the polymeric coupling region to the primer flash hole aperture and to the primer flash aperture groove to form a flash hole;
inserting a diffuser into the primer recess;
inserting a primer into the primer recess;
forming a polymeric projectile end component from a second polymer composition, wherein the polymeric projectile end comprises a projectile end coupling region that extends to a shoulder region that reduces to a neck region having a projectile aperture;
texturing the projectile end coupling region;
texturing the projectile aperture about an inner surface of the neck to form a textured projectile aperture surface;
coupling the projectile end coupling region to the projectile end coupling region to form a propellant chamber that extends from the primer flash hole aperture to the projectile aperture;
filling at least partially the propellant chamber with a propellant;
fitting a projectile in the projectile aperture; and
applying an adhesive to the textured projectile aperture surface, wherein the textured projectile aperture surface provides wicking of the adhesive down the textured projectile aperture surface.

### Claim 14 (depends on 13)

The method of claim 13, wherein the feed stock comprises one or more polymers.

### Claim 15

A method of making a polymeric ammunition having wicking texturing comprising the steps of:
injection molding a primer insert by
providing a primer insert mold comprising a top surface opposite a bottom surface and a coupling element that extends from the bottom surface, wherein the coupling element forms an outer surface opposite an inner circumferential surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture positioned in the primer recess to extend through the bottom surface, a primer flash aperture groove positioned in the primer recess around the primer flash aperture, and a locking groove that extends circumferentially about the top surface; and
injecting a molding material into the primer insert mold to form a primer insert;
molding from a first polymer composition a polymer ammunition cartridge by overmolding the primer insert to form a polymeric middle body having the primer insert at a first end and a polymeric coupling region at a second end, wherein the first polymer composition is overmolded and extends over an outer surface of the primer insert to the flange and extends over an interior surface of the coupling region to the primer flash hole aperture, wherein the first polymer composition extends from the polymeric coupling region to the primer flash hole aperture and to the primer flash aperture groove to form a flash hole;
inserting a diffuser into the primer recess;
inserting a primer into the primer recess;
forming a polymeric projectile end component from a second polymer composition, wherein the polymeric projectile end comprises a projectile end coupling region that extends to a shoulder region that reduces to a neck region having a projectile aperture, wherein the projectile aperture is textured;
coupling the projectile end coupling region to the projectile end coupling region to form a propellant chamber that extends from the primer flash hole aperture to the projectile aperture;
filling at least partially the propellant chamber with a propellant;
fitting a projectile in the projectile aperture; and
applying an adhesive to the textured projectile aperture surface, wherein the textured projectile aperture surface provides wicking of the adhesive down the textured projectile aperture surface.

### Claim 16 (depends on 15)

The method of claim 15, wherein the molding material comprise one or more metals, one or more polymers or one or more alloys.