WO1988009476A1 - Projectile d'exercice en materiau plastique - Google Patents

Projectile d'exercice en materiau plastique Download PDF

Info

Publication number
WO1988009476A1
WO1988009476A1 PCT/GB1988/000397 GB8800397W WO8809476A1 WO 1988009476 A1 WO1988009476 A1 WO 1988009476A1 GB 8800397 W GB8800397 W GB 8800397W WO 8809476 A1 WO8809476 A1 WO 8809476A1
Authority
WO
WIPO (PCT)
Prior art keywords
bullet
nose
filler
nylon
lubricant
Prior art date
Application number
PCT/GB1988/000397
Other languages
English (en)
Inventor
Andrew Thomas Booth
Original Assignee
Sprintvale Limited
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 Sprintvale Limited filed Critical Sprintvale Limited
Publication of WO1988009476A1 publication Critical patent/WO1988009476A1/fr

Links

Classifications

    • 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
    • F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
    • F42B12/745—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body the core being made of plastics; Compounds or blends of plastics and other materials, e.g. fillers

Definitions

  • the present invention relates to training aids and has particular relevance to bullets for training purposes but is not limited thereto.
  • Training bullets have been proposed comprising plastics material either encapsulating or filled with metal powders. Difficulties arise however in producing practice bullets which are easily manufactured, are stable against corrosion and against dimensional changes on storage, are stable against premature disintegration when fired and yet disintegrate on impact, and which are adequately accurate.
  • EP-B-0096617 discloses a training round having a bullet moulded in a mixture of nylon, a powder of a ductile metal, and a solid lubricant.
  • Training rounds are used in large numbers and even small reductions in unit costs will be important to the industry.
  • the material costs are very significant in manufacturing such rounds.
  • EP-B-0096617 is not specific as to the exact nylon to use, it has in practice been the expectation of those skilled in the art that amongst the nylons, only those such as nylon 11 having a low water absorbence characteristic would be suitable for producing bullets which would be stable upon long term storage in humid conditions. The expectation was that any other type of nylon, or any other plastics material absorbing water more readily, would swell in humid conditions making the rounds liable to cause jamming or excessive back pressure on firing.
  • nylon materials such as nylon 6 and nylon 66, once containing a substantial level of metal powder filler are sufficiently stable against water absorption. Both these materials have a higher water absorption factor than nylon 11 but we find that this does not prevent their satisfactory use in training ammunition of this kind.
  • Nylon 11 is an expensive grade of nylon. More hygroscopic grades are cheaper but have previously been thought unsuitable for these purposes.
  • the present invention provides a bullet comprising a matrix of plastics material having a water absorption factor similar to or greater than that of nylon 66 containing a filler material effective to raise the specific gravity of the bullet to from three to seven, preferably to from 4 to 6.5.
  • the water absorbtion factor is defined herein to mean the percentage by weight of water in the unfilled plastics at equilibrium under standard conditions of humidity and temperature.
  • plastics matrix may be made from a wide variety of plastics materials but the
  • material is preferably thermoplastic and should be selected to have sufficient stability against high temperature bearing in mind that a round may be in the chamber of a weapon for a considerable period when the weapon is hot and must withstand this temperature
  • the plastics matrix is of nylon 6 or nylon 66.
  • the filler is finely divided metal.
  • the filler may be copper, bronze, tungsten or a mixture of two or more thereof, or may be a metal compound of adequately high density, e.g. tungsten oxide.
  • the first suitable for general purpose use, is from 4 to 5.5 (preferably 4.6 to 5.0) specific gravity and contains copper powder as a filler.
  • the second typ ' e is designed to meet the more stringent requirements of the MP5 type of sub-machine gun, has a specific gravity of from 6 to 6.8 and contains a mixture of copper and tungsten power as filler.
  • bullets according to the invention contain a lubricant. This is preferably uniformly dispersed through the plastics material, but may be a particulate material such as graphite or molybdenum disulphide.
  • the lubricant is preferably a soap such as a stearate, e.g. calcium stearate.
  • the lubricant preferably has a melting point below that of the plastics material.
  • a first particularly preferred composition is approximately:- nylon - 11% (by weight) copper filler - 88% II II
  • a second particularly preferred composition is approximately:- nylon - 8% (by weight) copper filler - 44.5% ⁇ 1 n
  • the invention includes bullets which are shaped as a round nosed cylinder in which the nose approximates to a hemisphere of radius equal to the area of said cylinder.
  • the nose has a flat tip, suitably provided by a substantially planar region approximately
  • the exact shape must be tailored to allow reliable feeding through the loading mechanism of a satisfactory range of weapons.
  • the bullet reduces in transverse cross-sectional area more rapidly than would a true hemisphere on moving toward the tip over the region of the round nose adjoining the cylindrical part thereof.
  • the bullet reduces in transverse cross-sectional area more slowly than would a true hemisphere on moving towards the tip in the region of the round nose adjacent the tip.
  • the cross-sectional radius is reduced by about 4.5% compared to a true hemisphere of appropriate diameter at about 20% of a radius distance into the nose, toward the tip from the junction between the nose taken as a true hemisphere and the cylindrical part of the bullet.
  • said relative reduction in cross- section radius is at a maximum at about said 20% of a radius distance into the ' nose and the cross-section approximates more closely to that of a hemispherical nose both at points closer to the nose of the bullet and at points further from the nose of the bullet.
  • such bullets are of 9mm (0.357 inch) nominal calibre but preferably their actual diameter is 9.093mm (0.358 inch).
  • the bullets should be very slightly in excess of the diameter corresponding to the nominal calibre. Such excess should normally be about 0.3%. It is preferred generally that the bullets should be from 0.0127 to 0.038cm oversize in diameter , preferably about 0.0254cm (0.001 inch).
  • Bullets according to the invention may be made in any calibre, including calibres for automatic and non- automatic small arms, automatic and non-automatic rifles and for cannon, e.g. up to thirty millimetre calibre or even higher.
  • the invention will be illustrated by the following examples.
  • Example 1 Bullets were moulded to a diameter of 9.093mm, from an intimate mixture of the following components:- Nylon 66 20% (by weight) Bronze 79% "
  • the resulting bullets had a specific gravity of approximately four and were stable against deterioration on prolonged storage at high relative humidity. They were found to be accurate in use, and to disintegrate on impact.
  • Example 2 Bullets were moulded to a diameter of 9.093mm from a intimate mixture of:- Nylon 66 15% ( by weight)
  • the bullets were of a generally round nosed shape with the extreme tip flattened into an almost plane circular region of about 2mm diameter, providing a blunt nose.
  • the accompanying figure illustrates a preferred shape for a bullet according to the invention.
  • the general shape is cylindrical having a rounded nose 10 approximating to a hemisphere with the extreme tip 11 flattened.
  • the shape is more exactly defined by the following numerical parameters.
  • a hemisphere having a diameter of 9.093mm and passing through the circle defined by the flat tip would pass somewhat within the body of the bullet near the tip as indicated on an enlarged scale by the dotted line 1. It would then pass outside the bullet as the cylindrical portion is approached as indicated by the dotted line 2.
  • the actual radius of the transverse cross-section is about 4.5% less than would be the case if the nose were hemispherical.
  • the level E is about 20% along the radius of the notional hemisphere in the direction of the tip.
  • Example 3 Bullets were moulded to the shape shown in the figure with a diameter of 9.093mm from a composition consisting of an intimate mixture of - Nylon 6 11.2% (by weight) Calcium stearate 1.2% Copper powder 87.6% " n
  • the specific gravity was 4.8 and the shape and size of the bullets was as shown in the figure.
  • the resulting bullets were dimensionally stable in high humidity, were accurate in use, disintegrated into small pieces on impact and were fired satisfactorily from automatic pistols and Sterling sub-machine guns.
  • Example 4 Bullets were moulded from a composition consisting of an intimate mixture of: Nylon 6 8.24% (by weight)
  • Example 5 Tungsten powder 46.39% " The bullets had all the characteristics described in Example 3 except that their specific gravity was 6.4 and in addition they could be fired reliably from an HP5A2 sub-machine gun.
  • Example 5 Tungsten powder 46.39% " The bullets had all the characteristics described in Example 3 except that their specific gravity was 6.4 and in addition they could be fired reliably from an HP5A2 sub-machine gun.
  • the bullets had all the characteristics described in Example 3 save that they had a specific gravity of Whilst the invention has been described with reference to specific characteristics of the preferred embodiments, many modifications and variations thereof may be made within the scope of the invention.
  • the invention includes a bullet having substantially the following composition:-
  • This invention also includes a bullet having substantially the following composition:- Nylon 8% (by weight)
  • Lubricant 1% and having a specific gravity of approximately. 6.4.
  • the invention further includes a bullet comprising a matrix of plastics material containing a filler material effective to raise the specific gravity to from 3 to 7, which is shaped as a round nosed cylinder in which the nose approximates to a hemisphere of radius equal to that of said cylinder.
  • the nose has a flat tip.
  • the flat tip is provided by a substantially planar region approximately 3 sq mm in area.
  • the bullet reduces in transverse cross-sectional area more rapidly than a true hemisphere on moving toward the tip over the region of the round nose adjoining the cylindrical part thereof.
  • the cross-sectional radius is reduced by about 4.5% compared to a true hemisphere at about 20% of a radius distance into the nose toward the tip from the junction between the nose taken as a true hemisphere and the cylindrical part of the bullet.
  • the invention further includes a bullet comprising a matrix of plastics material containing a filler material effective to raise the specific gravity to from 3 to 7, which is oversize in diameter for its nominal calibre by about 0.3%, or which is oversize in diameter for its nominal calibre by about 0.0254 mm
  • the invention includes a training round comprising a bullet as described herein.

Abstract

Une cartouche d'exercice comprend une balle en matériau plastique contenant une substance de charge conçue de sorte que la balle ait une densité comprise entre 3 et 7, le matériau plastique étant relativement hygroscopique par rapport au nylon 11.
PCT/GB1988/000397 1987-05-21 1988-05-20 Projectile d'exercice en materiau plastique WO1988009476A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8712082 1987-05-21
GB878712082A GB8712082D0 (en) 1987-05-21 1987-05-21 Training aids

Publications (1)

Publication Number Publication Date
WO1988009476A1 true WO1988009476A1 (fr) 1988-12-01

Family

ID=10617735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1988/000397 WO1988009476A1 (fr) 1987-05-21 1988-05-20 Projectile d'exercice en materiau plastique

Country Status (5)

Country Link
AU (1) AU1784088A (fr)
ES (1) ES2008506A6 (fr)
GB (1) GB8712082D0 (fr)
PT (1) PT87543B (fr)
WO (1) WO1988009476A1 (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664039A1 (fr) * 1990-07-02 1992-01-03 Sauvestre Jean Claude Alliages mixtes organiques-metalliques pour realisation de projectiles.
WO1993016349A1 (fr) * 1992-02-07 1993-08-19 Snc Industrial Technologies Inc. Balles cassantes pour le tir d'entrainement
FR2691156A1 (fr) * 1992-05-13 1993-11-19 Sfm Defense Matière plastique de haute densité, notamment pour la réalisation de balles pour le tir d'exercice.
WO1994024511A1 (fr) * 1993-04-22 1994-10-27 Epron Industries Limited Grenaille de faible toxicite
US5616642A (en) * 1995-04-14 1997-04-01 West; Harley L. Lead-free frangible ammunition
US6536352B1 (en) 1996-07-11 2003-03-25 Delta Frangible Ammunition, Llc Lead-free frangible bullets and process for making same
US6815066B2 (en) 2001-04-26 2004-11-09 Elliott Kenneth H Composite material containing tungsten, tin and organic additive
US6933637B2 (en) 2003-04-14 2005-08-23 Showa Corporation Electric motor
US7204191B2 (en) 2002-10-29 2007-04-17 Polytech Ammunition Company Lead free, composite polymer based bullet and method of manufacturing
US7213519B2 (en) 2002-10-29 2007-05-08 Polytech Ammunition Company Composite polymer based cartridge case having an overmolded metal cup, polymer plug base assembly
US7217389B2 (en) * 2001-01-09 2007-05-15 Amick Darryl D Tungsten-containing articles and methods for forming the same
US7232473B2 (en) 2001-10-16 2007-06-19 International Non-Toxic Composite Composite material containing tungsten and bronze
US8443730B2 (en) 2011-01-14 2013-05-21 Pcp Tactical, Llc High strength polymer-based cartridge casing and manufacturing method
US8573126B2 (en) 2010-07-30 2013-11-05 Pcp Tactical, Llc Cartridge base and plastic cartridge case assembly for ammunition cartridge
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US8807008B2 (en) 2011-01-14 2014-08-19 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
US8869702B2 (en) 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US9470485B1 (en) 2004-03-29 2016-10-18 Victor B. Kley Molded plastic cartridge with extended flash tube, sub-sonic cartridges, and user identification for firearms and site sensing fire control
US9677860B2 (en) 2011-12-08 2017-06-13 Environ-Metal, Inc. Shot shells with performance-enhancing absorbers
US9921017B1 (en) 2013-03-15 2018-03-20 Victor B. Kley User identification for weapons and site sensing fire control
WO2019023446A1 (fr) * 2017-07-27 2019-01-31 Timberghost Tactical, Llc Munition pour armes légères à étui sans laiton et projectile sans plomb
US11353299B2 (en) 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios
US11976911B2 (en) 2022-06-06 2024-05-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995090A (en) * 1954-07-02 1961-08-08 Remington Arms Co Inc Gallery bullet
US3123003A (en) * 1962-01-03 1964-03-03 lange
US3785293A (en) * 1970-12-31 1974-01-15 Aai Corp Practice ammunition
GB2092274A (en) * 1981-01-29 1982-08-11 Spence Geoffrey Martin Projectiles
EP0096617A1 (fr) * 1982-06-11 1983-12-21 Societe Francaise De Munitions (S.F.M.) Balle d'exercice à base de matière plastique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995090A (en) * 1954-07-02 1961-08-08 Remington Arms Co Inc Gallery bullet
US3123003A (en) * 1962-01-03 1964-03-03 lange
US3785293A (en) * 1970-12-31 1974-01-15 Aai Corp Practice ammunition
GB2092274A (en) * 1981-01-29 1982-08-11 Spence Geoffrey Martin Projectiles
EP0096617A1 (fr) * 1982-06-11 1983-12-21 Societe Francaise De Munitions (S.F.M.) Balle d'exercice à base de matière plastique

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664039A1 (fr) * 1990-07-02 1992-01-03 Sauvestre Jean Claude Alliages mixtes organiques-metalliques pour realisation de projectiles.
WO1992000499A1 (fr) * 1990-07-02 1992-01-09 Sauvestre Jean Claude Alliages mixtes organiques-metalliques pour realisation de projectiles
AU673155B2 (en) * 1992-02-07 1996-10-31 Snc Industrial Technologies Inc. Frangible practice ammunition
US5237930A (en) * 1992-02-07 1993-08-24 Snc Industrial Technologies, Inc. Frangible practice ammunition
WO1993016349A1 (fr) * 1992-02-07 1993-08-19 Snc Industrial Technologies Inc. Balles cassantes pour le tir d'entrainement
FR2691156A1 (fr) * 1992-05-13 1993-11-19 Sfm Defense Matière plastique de haute densité, notamment pour la réalisation de balles pour le tir d'exercice.
WO1994024511A1 (fr) * 1993-04-22 1994-10-27 Epron Industries Limited Grenaille de faible toxicite
US5616642A (en) * 1995-04-14 1997-04-01 West; Harley L. Lead-free frangible ammunition
US6536352B1 (en) 1996-07-11 2003-03-25 Delta Frangible Ammunition, Llc Lead-free frangible bullets and process for making same
US7217389B2 (en) * 2001-01-09 2007-05-15 Amick Darryl D Tungsten-containing articles and methods for forming the same
US6815066B2 (en) 2001-04-26 2004-11-09 Elliott Kenneth H Composite material containing tungsten, tin and organic additive
US7232473B2 (en) 2001-10-16 2007-06-19 International Non-Toxic Composite Composite material containing tungsten and bronze
US7204191B2 (en) 2002-10-29 2007-04-17 Polytech Ammunition Company Lead free, composite polymer based bullet and method of manufacturing
US7213519B2 (en) 2002-10-29 2007-05-08 Polytech Ammunition Company Composite polymer based cartridge case having an overmolded metal cup, polymer plug base assembly
US6933637B2 (en) 2003-04-14 2005-08-23 Showa Corporation Electric motor
US9470485B1 (en) 2004-03-29 2016-10-18 Victor B. Kley Molded plastic cartridge with extended flash tube, sub-sonic cartridges, and user identification for firearms and site sensing fire control
US9891030B1 (en) 2004-03-29 2018-02-13 Victor B. Kley Molded plastic cartridge with extended flash tube, sub-sonic cartridges, and user identification for firearms and site sensing fire control
US8573126B2 (en) 2010-07-30 2013-11-05 Pcp Tactical, Llc Cartridge base and plastic cartridge case assembly for ammunition cartridge
US9599443B2 (en) 2010-07-30 2017-03-21 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US9003973B1 (en) 2011-01-14 2015-04-14 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US8869702B2 (en) 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US8875633B2 (en) 2011-01-14 2014-11-04 Pcp Tactical, Llc Adhesive lip for a high strength polymer-based cartridge casing and manufacturing method
US11353299B2 (en) 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US9194680B2 (en) 2011-01-14 2015-11-24 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US9261335B2 (en) 2011-01-14 2016-02-16 Pcp Tactical, Llc Frangible portion for a high strength polymer-based cartridge casing and manufacturing method
US9372054B2 (en) 2011-01-14 2016-06-21 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US9995561B2 (en) 2011-01-14 2018-06-12 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge for blank and subsonic ammunition
US8443730B2 (en) 2011-01-14 2013-05-21 Pcp Tactical, Llc High strength polymer-based cartridge casing and manufacturing method
US8807008B2 (en) 2011-01-14 2014-08-19 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US9897424B2 (en) 2011-12-08 2018-02-20 Environ-Metal, Inc. Shot shells with performance-enhancing absorbers
US9677860B2 (en) 2011-12-08 2017-06-13 Environ-Metal, Inc. Shot shells with performance-enhancing absorbers
US10209044B2 (en) 2011-12-08 2019-02-19 Environ-Metal, Inc. Shot shells with performance-enhancing absorbers
USD765214S1 (en) 2012-01-13 2016-08-30 Pcp Tactical, Llc Radiused insert
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
US9921017B1 (en) 2013-03-15 2018-03-20 Victor B. Kley User identification for weapons and site sensing fire control
WO2019023446A1 (fr) * 2017-07-27 2019-01-31 Timberghost Tactical, Llc Munition pour armes légères à étui sans laiton et projectile sans plomb
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios
US11976911B2 (en) 2022-06-06 2024-05-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition

Also Published As

Publication number Publication date
GB8712082D0 (en) 1987-07-22
PT87543B (pt) 1993-09-30
AU1784088A (en) 1988-12-21
PT87543A (pt) 1989-05-31
ES2008506A6 (es) 1989-07-16

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