WO2009151429A1 - Munition revêtue et procédés de réalisation - Google Patents

Munition revêtue et procédés de réalisation Download PDF

Info

Publication number
WO2009151429A1
WO2009151429A1 PCT/US2008/010835 US2008010835W WO2009151429A1 WO 2009151429 A1 WO2009151429 A1 WO 2009151429A1 US 2008010835 W US2008010835 W US 2008010835W WO 2009151429 A1 WO2009151429 A1 WO 2009151429A1
Authority
WO
WIPO (PCT)
Prior art keywords
ammunition
coating
unit
casing
resistant
Prior art date
Application number
PCT/US2008/010835
Other languages
English (en)
Inventor
George Evan Bybee
John Walter Horne
Brad Mackerell
Ryan Payne
Original Assignee
Mirage Products, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mirage Products, Llc filed Critical Mirage Products, Llc
Publication of WO2009151429A1 publication Critical patent/WO2009151429A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/76—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the casing
    • F42B12/80—Coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/02—Bullets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal
    • F42B5/295—Cartridge cases of metal, i.e. the cartridge-case tube is of metal coated
    • F42B5/297—Cartridge cases of metal, i.e. the cartridge-case tube is of metal coated with plastics

Definitions

  • This invention relates to the manufacture of ammunition, and specifically relates to methods for producing ammunition that is waterproof and resistant to invasive corrosive materials that may lead to misfiring or fouling.
  • the types of casings, primers, propellants and projectiles used in ammunition varies widely.
  • the size of the unit of ammunition may vary as well from a small caliber ammunition to large military munitions and bombs.
  • the casing is made of a metal material, typically brass.
  • Brass is a soft metal that is particularly suited for use as ammunition casings because it does not mar the bore of the firearm and does not harm the firing mechanism.
  • brass casings are shiny and, therefore, present a problem in terms of being observable from long distances. The ability to see the casing, particularly spent casings, readily identifies the position of the shooter, which is very undesirable in hunting and in covert or other military operations.
  • ammunition having the entire cartridge coated or treated with a material suitable for rendering the ammunition waterproof, resistant to degradation from environmental forces and having low-observability. Methods for making such ammunition are also disclosed.
  • fully-assembled ammunition i.e., the primer, propellant and projectile are positioned in and attached to the casing to form a complete, ready-to-use cartridge
  • a coating material that renders the entire cartridge waterproof and resistant to degradation from environmental forces.
  • the method of the present invention assures that all crevices or openings of the ammunition are coated to block infiltration of moisture and other undesirable or deleterious environmental elements, such as sand, salt and other corrosive elements, that might cause fouling, ammunition failure or misfiring.
  • FIG. 1 is a schematic view of a unit of ammunition that is coated in accordance with prior art methods.
  • FIG. 2 is a schematic view of a unit of ammunition that is coated in accordance with the present invention.
  • FIG. 1 illustrates a typical unit of ammunition, or bullet 10.
  • the term “ammunition” is meant to refer to any manner, form, design or configuration of a member that can be fired from a weapon, and which comprises at least a casing, propellant, a projectile and primer.
  • Others terms that may be used herein that are considered synonymous with “ammunition” include “cartridge,” “shell,” “bullet,” “projectile” and
  • a typical bullet 10, as depicted in FIG. 1 comprises a casing 12 which houses a propellant 14.
  • the casing 12 has an open end 16 in which is positioned a projectile 18.
  • a fuse or primer 20 is positioned through the closed end 22 of the casing 12 and is in contact with the propellant 14.
  • the casing 12 is formed with a thin coat 24 of material that endows the bullet 10 with low observability. That is, in prior art coating systems, the casing 12 is first coated, and then the ammunition is assembled by placement of the projectile 18 in the open end 16 of the casing 12. As a result, a gap remains between the projectile 18 and the casing 12 at the point of insertion of the projectile 18 into the casing 12. Moisture and other deleterious matter can then infiltrate into the gap and foul the propellant or otherwise lead to a non-functional round of ammunition.
  • FIG. 2 schematically depicts ammunition made in accordance with the present invention, where like structures of the ammunition of the present invention and the prior art bullet are designated by the same reference numeral for comparative purposes.
  • the ammunition of the present invention generally comprises a casing 12 which houses a propellant 14 and in the open end 16 of which is positioned a projectile 18.
  • a primer 20 is positioned through the closed end 22 of the casing 12.
  • a coating 30 is formed on the entire unit of ammunition after the unit of ammunition has been fully assembled for its intended purpose. Consequently, the coating 30 seals the gap that otherwise exists at the open end 16 of the casing 12 where the projectile 18 is inserted into the casing 12.
  • the coating material that is used to coat and seal the cartridge is suitably any coating substance that can provide a thin, and highly adherent coating on the entire cartridge to render the cartridge resistant to infiltration of moisture, sand, and any other undesirable or deleterious matter into the cartridge.
  • Coatings that are particularly suitable for use are those that have high adhesion quality and durability. High adhesion characteristics can be determined by any number of adhesion measurement methods known to those of skill in the art, including ASTM D4541 , ISO 4634, ASTM D3359 and ASTM D6677 methodologies. High adhesion may be characterized by one standard as measuring between 800 psi and 4,000 psi adherent force.
  • the coatings that are most suitable for the invention also demonstrate durability and resistance to environmental challenges, such as abrasion or corrosion.
  • the coating material may preferably be heat stable above 300° F, and may be heat stable up to 2000° F.
  • the coating material may preferably be formulated to have a matte or dull finish to provide low-observability to the ammunition. Notably, low-observability may be an optional feature depending upon the intended use of the ammunition.
  • the coating material may also be desirably formulated with low viscosities and low volatile organic compounds (VOC) content.
  • Coating materials that are particularly suitable for use in coating ammunition in accordance with the invention include cross linked epoxies, polyurethanes and polysiloxane coating materials, or any other similar coating material that possesses good adhesion properties and resistance to moisture and other environmental challenges, such as abrasive materials or corrosive materials or conditions.
  • Exemplary suitable coating materials that may be used in making ammunition of the present invention are inorganic polymers having the desired characteristics of high heat stability, good adhesion and resistance to environmental degradation.
  • Particularly suitable coating materials are inorganic silicon-based polymers, such as silicon-based epoxies.
  • Zinc silicates for example, provide the desired characteristics necessary to the production of the ammunition of the present invention, and tend to display inherent low gloss, or matte, characteristics suitable for low- observability.
  • Another particularly suitable coating material is an essentially inorganic, silicon-oxygen polymer, such as polysiloxane polymers.
  • Polysiloxane polymers have very high heat stability (up to about 2000° F) and, therefore, provide a heat resistant coating that is desirable in the coating of ammunition.
  • Suitable polysiloxane polymers also provide thin, very durable, highly adherent and hard film coatings that are similar in structure to quartz compound structures. Examples of epoxy polysiloxane coatings that may be useful in the invention are disclosed in U.S. Patent No. 5,618,860 and U.S.
  • Patent No. 5,275,645 U.S. Patent No. 5,618,860; U.S. Patent No. ,5760,155; U.S. Patent No. 5,888,280; U.S. Patent No. 5,942,073; and U.S. Patent No. 6,169,066.
  • XylexinTM coating which is available from Shield Master of Provo, Utah.
  • Polysiloxane polymers further provide a coating which renders the ammunition resistant to water and other environmental damage or degradation which can cause failure of the ammunition to fire. Such conditions include infiltration of moisture, sand and dirt into the casing. Polysiloxane polymers have low viscosity and are excellent for combining with other compounds or formulas to achieve the desired qualities of the coating material. For example, colorants may be added to provide a selected color or look (e.g., a designated pattern, such as camouflage) to the ammunition. The coloration of the ammunition may also be beneficial in identifying the source of the ammunition.
  • compounds may be added to achieve the desired finish to the ammunition, such as a matte, low-gloss or dulled finish.
  • Polysiloxane polymers because of their low viscosities, are also low VOC compounds so that they are more environmentally safe, and safe to handle.
  • Additional compounds or material may be added to the coating to aid in the process of coating the ammunition for later identity or quality assurance.
  • suitable doping agents or specially formulated fluorescing compounds can be added to the coating that enable the coated cartridge to fluoresce upon exposure to ultraviolet (UV) light, thereby providing assurance that the ammunition has been fully and adequately coated.
  • UV ultraviolet
  • the use of different fluorescing agents may also act as a marker to aid in later identification of the source of the ammunition. Suitable fluorescing agents are available from Beaver Luminescers of Newton, Massachusetts.
  • the coated ammunition of the present invention is made by coating or otherwise treating an entirely formed cartridge, meaning that the projectile, propellant and primer are completely formed to the casing to produce a "ready-to-use" unit of ammunition.
  • the fully formed ammunition is then coated with a thin layer or film of the coating material.
  • the thickness of the layer or film of coating may be from about 0.01 mm to about 0.045 mm, depending on the size of the ammunition, with smaller caliber ammunition having thinner coating and large artillery shells having a relatively thicker coating.
  • the weight of the coating is less than 0.09 % of the total weight of the unit of ammunition.
  • the layer or film of coating material is applied to the fully formed unit of ammunition by any known method, including but not limited to, spraying, dipping, brushing, rolling, electro-deposition, or combinations of these techniques.
  • a single layer of coating material is sufficient to produce a unit of ammunition with the desired characteristics as described herein.
  • the coating may be allowed to dry, cure or set under ambient conditions.
  • an anaerobic curable coating is used to coat the ammunition to assure that the coating fully seals all openings or crevices in the ammunition, thereby assuring that the ammunition is waterproof and sealed from deleterious environmental matter, such as sand or salt.
  • anaerobic curable coatings that may be employed in the present invention is described in U.S. Patent No. 6,883,413, the contents of which are incorporated herein by reference.
  • the described inorganic polymers used in making the ammunition of the invention typically have excellent adherent qualities, or can be blended with other compounds to achieve the desired or necessary adhere characteristics, it may be desirable to pre-treat the fully formed unit of ammunition as a means of improving adhesion of the coating material to the ammunition.
  • the unit of ammunition may be etched by mechanical means to roughen the surface of the ammunition.
  • the ammunition may be acid-etched or subjected to an acid bath to prepare the surface of the ammunition for receipt of the coating material.
  • Other means for preparing or treating the surface of the ammunition are known and usable to produce the desired characteristics in the finished ammunition.
  • the ammunition of the present invention has been especially designed to withstand the desert conditions experienced in the conflicts of desert areas such as the Middle East where firing failures are extremely high due to sand, grit and/or moisture infiltrating the ammunition.
  • the ammunition of the present invention is also low-observable, making the ammunition suitable for a wide range of uses and applications, both civilian and military. Reference herein to specific details of the structure of coated ammunition and the methods of making are by way of example only and are not meant to be by way of limitation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention porte sur une munition, constituée globalement par une enceinte, un propulseur, un projectile et une amorce, qui est entièrement revêtue d'un revêtement qui rend la munition résistante aux infiltrations d'humidité ou de matières délétères, telles que du sable ou du sel, qui ont pour effet de polluer le propergol, ou autrement de provoquer un raté de la munition ou une explosion incorrecte. L'invention porte également sur des procédés de réalisation de munition selon l'invention.
PCT/US2008/010835 2007-09-17 2008-09-17 Munition revêtue et procédés de réalisation WO2009151429A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99408107P 2007-09-17 2007-09-17
US60/994,081 2007-09-17

Publications (1)

Publication Number Publication Date
WO2009151429A1 true WO2009151429A1 (fr) 2009-12-17

Family

ID=41416957

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/010835 WO2009151429A1 (fr) 2007-09-17 2008-09-17 Munition revêtue et procédés de réalisation

Country Status (2)

Country Link
US (1) US20120199033A1 (fr)
WO (1) WO2009151429A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014086630A1 (fr) * 2012-12-04 2014-06-12 Rheinmetall Waffe Munition Gmbh Munition formant cartouche

Families Citing this family (24)

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USD652472S1 (en) * 2010-08-14 2012-01-17 Daniel Klement Shotgun shell casing
US10352670B2 (en) 2010-11-10 2019-07-16 True Velocity Ip Holdings, Llc Lightweight polymer ammunition cartridge casings
US11300393B2 (en) 2010-11-10 2022-04-12 True Velocity Ip Holdings, Llc Polymer ammunition having a MIM primer insert
US9885551B2 (en) 2010-11-10 2018-02-06 True Velocity, Inc. Subsonic polymeric ammunition
US10876822B2 (en) 2017-11-09 2020-12-29 True Velocity Ip Holdings, Llc Multi-piece polymer ammunition cartridge
US8561543B2 (en) 2010-11-10 2013-10-22 True Velocity, Inc. Lightweight polymer ammunition cartridge casings
US11118875B1 (en) * 2010-11-10 2021-09-14 True Velocity Ip Holdings, Llc Color coded polymer ammunition cartridge
US11047663B1 (en) 2010-11-10 2021-06-29 True Velocity Ip Holdings, Llc Method of coding polymer ammunition cartridges
US10197366B2 (en) 2011-01-14 2019-02-05 Pcp Tactical, Llc Polymer-based cartridge casing for blank and subsonic ammunition
US20150241183A1 (en) * 2011-01-14 2015-08-27 Pcp Tactical, Llc Overmolded high strength polymer-based cartridge casing for blank and subsonic ammunition
CN205710549U (zh) * 2014-11-12 2016-11-23 美铝公司 弹药枪弹
US9835427B2 (en) 2016-03-09 2017-12-05 True Velocity, Inc. Two-piece primer insert for polymer ammunition
EP3433561B1 (fr) 2016-03-25 2021-03-17 Vista Outdoor Operations LLC Système msr à énergie réduite
US11118851B2 (en) 2016-03-25 2021-09-14 Vista Outdoor Operations Llc Reduced energy MSR system
USD886937S1 (en) 2017-12-19 2020-06-09 True Velocity Ip Holdings, Llc Ammunition cartridge
USD886231S1 (en) 2017-12-19 2020-06-02 True Velocity Ip Holdings, Llc Ammunition cartridge
US10753718B1 (en) * 2018-03-16 2020-08-25 Vista Outdoor Operations Llc Colored cartridge packaging
USD857523S1 (en) 2018-03-16 2019-08-27 Vista Outdoor Operations Llc Cartridge packaging
IL280522B1 (en) 2018-07-30 2024-06-01 Pcp Tactical Llc Polymer cartridge with metallic click insert and improved thickness ratios
USD893668S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD893667S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891568S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891567S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
WO2022026004A1 (fr) * 2020-07-29 2022-02-03 Suman Andrew W Procédé de réduction de l'échauffement du canon d'une arme à feu

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US3332352A (en) * 1965-11-24 1967-07-25 Remington Arms Co Inc Coating for plastic shotshells
US6460464B1 (en) * 1999-07-19 2002-10-08 Henkel Loctite Corporation Adhesive for ring seal in center fire ammunition
US20060004137A1 (en) * 2002-05-23 2006-01-05 Douglas Shepherd Coating composition
US20060030495A1 (en) * 2004-08-06 2006-02-09 Gregg George L Jr Bullet lubrication formula
US20070044644A1 (en) * 2003-05-29 2007-03-01 Natec, Inc. Ammunition Article And Apparatus For Making Ammunition Articles

Family Cites Families (1)

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US3607365A (en) * 1969-05-12 1971-09-21 Minnesota Mining & Mfg Vapor phase method of coating substrates with polymeric coating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332352A (en) * 1965-11-24 1967-07-25 Remington Arms Co Inc Coating for plastic shotshells
US6460464B1 (en) * 1999-07-19 2002-10-08 Henkel Loctite Corporation Adhesive for ring seal in center fire ammunition
US20060004137A1 (en) * 2002-05-23 2006-01-05 Douglas Shepherd Coating composition
US20070044644A1 (en) * 2003-05-29 2007-03-01 Natec, Inc. Ammunition Article And Apparatus For Making Ammunition Articles
US20060030495A1 (en) * 2004-08-06 2006-02-09 Gregg George L Jr Bullet lubrication formula

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014086630A1 (fr) * 2012-12-04 2014-06-12 Rheinmetall Waffe Munition Gmbh Munition formant cartouche

Also Published As

Publication number Publication date
US20120199033A1 (en) 2012-08-09

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