US3463047A - Method of making disintegrating bodies for use as practice ammunition - Google Patents

Method of making disintegrating bodies for use as practice ammunition Download PDF

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Publication number
US3463047A
US3463047A US622356A US3463047DA US3463047A US 3463047 A US3463047 A US 3463047A US 622356 A US622356 A US 622356A US 3463047D A US3463047D A US 3463047DA US 3463047 A US3463047 A US 3463047A
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United States
Prior art keywords
round
particles
lubricant
weight
disintegrating
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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US622356A
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English (en)
Inventor
Raimund Germershausen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinmetall Industrie AG
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Rheinmetall GmbH
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Filing date
Publication date
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
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Publication of US3463047A publication Critical patent/US3463047A/en
Anticipated expiration legal-status Critical
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/14—Projectiles or missiles disintegrating in flight or upon impact
    • F42B8/16—Projectiles or missiles disintegrating in flight or upon impact containing an inert filler in powder or granular form

Definitions

  • the invention relates to a method of making disintegrating bodies for use as practice ammunition.
  • the bodies consist of a single-part or multipart molding of a metal powder mixture enclosed in a projectile casing of a plastics material.
  • a lubricant which stops caking of the molding on disintegration of the projectile after the latter has left the muzzle of the weapon from which the round of ammunition was fired.
  • the requirements to be met by a successful practice round are very exacting.
  • the round especially if it is to be fired from an automatic weapon, must be equal to the high mechanical stresses which occur during feeding, loading and on firing on the one hand and on the other hand, the round must so disintegrate immediately after leaving the muzzle that it is not able to do damage beyond a certain distance from the muzzle.
  • the external shape and the weight of such a practice round shall resemble closely those of a live round. In such case, weights per unit of volume of about 6.5 g./cc. are required of the disintegrating body of a practice round for automatic weapons and these densities can be produced from loose material only by means of heavy metal powder which are costly.
  • the casing of the round which is made of cardboard, thin sheet metal or a plastics material is filled with a powdered heavy metal, for example lead powder, to which there is added graphite, talc or the like which is ostensibly intended to prevent the metal powder particles caking together on disintegration of the round.
  • a powdered heavy metal for example lead powder
  • Another method is also known in which the internal cohesion of a molding consisting of iron powder is reduced.
  • the metal powder is first formed into moldings under an applied pressure sufficient to secure a required density, after which the coherence of the powder particles in the moldings is so reduced by a mechanical or chemical action, while retaining the shape of the moldings, that the moldings are able to disperse in fine powder after the round leaves the muzzle.
  • the mechanical or chemical aftertreatment for the purpose of reducing the cohesion is not only costly, but also is difiicult to reproduce reliably.
  • the present invention is based on the surprising discovery that the disintegration properties of iron powder moldings can be considerably improved by a suitable choice of the starting materials as regards the size and nature of the surface of the particles of iron and by adding special lubricants. Such improvement is obtained without the strength required for handling during the manufacture of the round and to withstand the stresses during the feeding and loading process in the weapon being impaired at the same time.
  • the procedure which is followed in making moldings for disintegrating practice rounds is that iron powder whose particles have a greatly cleft or roughened surface and iron powder whose particles have a smooth spherical surface are subjected, in approximately equal parts by weight, to a mixing treatment with the addition of a lubricant, after which the pourable mixed material is compacted under a load per unit of area of from about 6.5 to about 8.0 tons/sq. cm. into a single-part or multipart molding conforming to the internal shape of the casing.
  • Another advantage of the lubricant is that it causes the iron particles to slide over one another with reduced friction and interengagement during the compacting operation.
  • the lubricant itself may consist of a mixture of stearic acid and finely ground Phosphor bronze.
  • the stearic acid is first melted and the Phosphor bronze dust is then introduced into the melt while stirring. This mixture is thereafter cooled while being stirred vigorously.
  • the solidified suspension is then ground until the particle size is a multiple of that of the Phosphor bronze dust introduced.
  • the effect of the lubricant can be further improved by adding paraflin oil.
  • a mixture of stearic acid and Phosphor bronze is outstandingly suitable as a lubricant and is one which can be mixed very well with the iron powder
  • other lubricants may be used, among which are, for example, graphits, waxes or synthetic resin products.
  • the first method to be described employs the following constituents:
  • the proportion by weight of the lubricant in the total weight of a disintegrating body is 3 to 8 percent by weight.
  • the constituents are mixed together in a mixer with the addition of 2 to cc. of parafiin oil per kilogram of the quantity used until the powder has been completely mixed.
  • the loose material obtained in this way is then compacted at a loading per unit of area of 6.5 to 8 tons/ sq. cm. to produce a body whose shape approximates to that of a projectile.
  • the constituents are mixed together as before and then compacted to produce a projectile-shaped body.
  • the drawing shows a disintegrating practice ammunition round which consists essentially of a casing 1 of a plastic material, a long-shanked base part 2 and a reinforcing element 3 arranged in the casing in the zone of the rotating or driving band.
  • the disintegrating bodies 4 and 5 consisting respectively of a moulding tapering to a point and a cylindrical moulding into the empty projectile casing 1 are inserted into the casing, after which, once the element 3 has been inserted, the shank of the projectile base 2, which is likewise filled with a disintegrating body 6, is inserted in the projectile casing 1.
  • a disintegrating body which is continuous from base to tip is employed as the core of the round.
  • a method of preparing a disintegrating practice ammunition round having an outer plastic casing comprismg:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Lubricants (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
US622356A 1966-03-11 1967-03-10 Method of making disintegrating bodies for use as practice ammunition Expired - Lifetime US3463047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER42806A DE1286703B (de) 1966-03-11 1966-03-11 Verfahren zur Herstellung von Zerfallkoerpern fuer UEbungsmunition

Publications (1)

Publication Number Publication Date
US3463047A true US3463047A (en) 1969-08-26

Family

ID=7406763

Family Applications (1)

Application Number Title Priority Date Filing Date
US622356A Expired - Lifetime US3463047A (en) 1966-03-11 1967-03-10 Method of making disintegrating bodies for use as practice ammunition

Country Status (9)

Country Link
US (1) US3463047A (forum.php)
AT (1) AT278593B (forum.php)
BE (1) BE695321A (forum.php)
CH (1) CH445035A (forum.php)
DE (1) DE1286703B (forum.php)
DK (1) DK112073B (forum.php)
FR (1) FR1513883A (forum.php)
GB (1) GB1135917A (forum.php)
NL (1) NL6702996A (forum.php)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861311A (en) * 1973-07-13 1975-01-21 Us Air Force Plastic semi armor piercing incendiary projectile
US3951035A (en) * 1971-12-01 1976-04-20 Nederlandsche Wapen-En Munitiefabriek De Kruithoorn N.V. Method of making dummy bullets
US4508567A (en) * 1981-07-02 1985-04-02 Brother Kogyo Kabushiki Kaisha Press-molding process for preparing a powder compact
US4798144A (en) * 1985-09-11 1989-01-17 Hoesch Aktiengesellschaft Hollow charge shell constructed as drill ammunition
US4825518A (en) * 1987-01-27 1989-05-02 Honeywell Inc. Method of manufacturing FIN stabilized armor-penetrating tracer projectiles
US4850278A (en) * 1986-09-03 1989-07-25 Coors Porcelain Company Ceramic munitions projectile
US4939996A (en) * 1986-09-03 1990-07-10 Coors Porcelain Company Ceramic munitions projectile
DE9204695U1 (de) * 1992-04-04 1992-07-02 Hetzel, Stefan, 5480 Remagen Geschoß, insbesondere für Kleinkaliber- bis Mittelkaliber-Handfeuerwaffen
US5677509A (en) * 1995-09-08 1997-10-14 Snc Inudstrial Technologies Inc. Bedding and training round for mortars
US5760331A (en) * 1994-07-06 1998-06-02 Lockheed Martin Energy Research Corp. Non-lead, environmentally safe projectiles and method of making same
WO1999008063A1 (en) * 1997-08-08 1999-02-18 Remington Arms Company, Inc. Frangible powdered iron projectiles
US5913256A (en) * 1993-07-06 1999-06-15 Lockheed Martin Energy Systems, Inc. Non-lead environmentally safe projectiles and explosive container
WO2000055569A3 (en) * 1999-03-08 2001-03-08 Harold F Beal A multi-part projectile and method of making
WO2001069165A3 (en) * 2000-03-08 2002-02-28 Harold F Beal A multi-part projectile and method of making
WO2002044645A1 (en) * 2000-11-03 2002-06-06 Nammo Raufoss As Projectile containing a heavy core surrounded by a jacket
US6640724B1 (en) 1999-08-04 2003-11-04 Olin Corporation Slug for industrial ballistic tool
US6892647B1 (en) 1997-08-08 2005-05-17 Ra Brands, L.L.C. Lead free powdered metal projectiles
US20060243154A1 (en) * 2005-01-17 2006-11-02 Giuliano Illesi Manufacturing process of an inert ballistic element for training purposes and the inert ballistic element manufactured by said process
US20060266249A1 (en) * 2003-07-04 2006-11-30 Giuliano Illesi Method of making inactive ballistic exercise elements and inactive ballistic element made by said method
US20070272112A1 (en) * 2000-02-23 2007-11-29 Alliant Techsystems Inc. Reactive material compositions, shot shells including reactive materials, and a method of producing same
US20080035007A1 (en) * 2005-10-04 2008-02-14 Nielson Daniel B Reactive material enhanced projectiles and related methods
US20080229963A1 (en) * 2004-03-15 2008-09-25 Alliant Techsystems Inc. Reactive material enhanced munition compositions and projectiles containing same
US20100212535A1 (en) * 2007-07-11 2010-08-26 Beal Harold F Traceable Frangible Projectile
US20100276042A1 (en) * 2004-03-15 2010-11-04 Alliant Techsystems Inc. Reactive compositions including metal
US20100288255A1 (en) * 2006-03-10 2010-11-18 Jenson Martin W Apparatus, system, and method for launching a granular substance
US8393273B2 (en) 2009-01-14 2013-03-12 Nosler, Inc. Bullets, including lead-free bullets, and associated methods
USRE45899E1 (en) 2000-02-23 2016-02-23 Orbital Atk, Inc. Low temperature, extrudable, high density reactive materials
US20160091290A1 (en) * 2014-09-29 2016-03-31 Pm Ballistics Llc Lead free frangible iron bullets

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528564B1 (fr) * 1982-06-11 1986-12-19 Munitions Ste Fse Balle d'exercice a base de matiere plastique
DE3617460C1 (de) * 1986-05-23 1987-10-01 Nwm De Kruithoorn Bv Zerfallgeschoss fuer patronierte Manoevermunition
DE3618205A1 (de) * 1986-06-03 1987-12-17 Mannesmann Ag Rotationssymmetrischer presskoerper fuer zerfallgeschosse und verfahren zu seiner herstellung
DE102024109340A1 (de) * 2024-04-03 2025-10-09 Rws Gmbh Mantelgeschoss und Verfahren zum Herstellen eines Mantelgeschosses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB625364A (en) * 1946-07-17 1949-06-27 Ind De L Aluminium Sa Improvements relating to light metal bodies and methods of manufacturing the same
GB718252A (en) * 1952-05-16 1954-11-10 Ind De L Aluminium Sa Method of making pressed bodies from flaky aluminium powder
US3216358A (en) * 1962-07-26 1965-11-09 Mannesmann Ag Method of making readily disintegrating projectile cores for practice ammunition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB625364A (en) * 1946-07-17 1949-06-27 Ind De L Aluminium Sa Improvements relating to light metal bodies and methods of manufacturing the same
GB718252A (en) * 1952-05-16 1954-11-10 Ind De L Aluminium Sa Method of making pressed bodies from flaky aluminium powder
US3216358A (en) * 1962-07-26 1965-11-09 Mannesmann Ag Method of making readily disintegrating projectile cores for practice ammunition

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951035A (en) * 1971-12-01 1976-04-20 Nederlandsche Wapen-En Munitiefabriek De Kruithoorn N.V. Method of making dummy bullets
US3861311A (en) * 1973-07-13 1975-01-21 Us Air Force Plastic semi armor piercing incendiary projectile
US4508567A (en) * 1981-07-02 1985-04-02 Brother Kogyo Kabushiki Kaisha Press-molding process for preparing a powder compact
US4798144A (en) * 1985-09-11 1989-01-17 Hoesch Aktiengesellschaft Hollow charge shell constructed as drill ammunition
US4850278A (en) * 1986-09-03 1989-07-25 Coors Porcelain Company Ceramic munitions projectile
US4939996A (en) * 1986-09-03 1990-07-10 Coors Porcelain Company Ceramic munitions projectile
US4825518A (en) * 1987-01-27 1989-05-02 Honeywell Inc. Method of manufacturing FIN stabilized armor-penetrating tracer projectiles
DE9204695U1 (de) * 1992-04-04 1992-07-02 Hetzel, Stefan, 5480 Remagen Geschoß, insbesondere für Kleinkaliber- bis Mittelkaliber-Handfeuerwaffen
US6174494B1 (en) 1993-07-06 2001-01-16 Lockheed Martin Energy Systems, Inc. Non-lead, environmentally safe projectiles and explosives containers
US5913256A (en) * 1993-07-06 1999-06-15 Lockheed Martin Energy Systems, Inc. Non-lead environmentally safe projectiles and explosive container
US5963776A (en) * 1994-07-06 1999-10-05 Martin Marietta Energy Systems, Inc. Non-lead environmentally safe projectiles and method of making same
US6149705A (en) * 1994-07-06 2000-11-21 Ut-Battelle, Llc Non-lead, environmentally safe projectiles and method of making same
US5760331A (en) * 1994-07-06 1998-06-02 Lockheed Martin Energy Research Corp. Non-lead, environmentally safe projectiles and method of making same
US5677509A (en) * 1995-09-08 1997-10-14 Snc Inudstrial Technologies Inc. Bedding and training round for mortars
US6317946B1 (en) * 1997-01-30 2001-11-20 Harold F. Beal Method for the manufacture of a multi-part projectile for gun ammunition and product produced thereby
US6626114B2 (en) 1997-01-30 2003-09-30 Doris Nebel Beal Intervivos Patent Trust Projectile having a disc and multiple cores
US6691623B1 (en) * 1997-08-08 2004-02-17 Ra Brands, Llc Frangible powdered iron projectiles
US6892647B1 (en) 1997-08-08 2005-05-17 Ra Brands, L.L.C. Lead free powdered metal projectiles
US5917143A (en) * 1997-08-08 1999-06-29 Remington Arms Company, Inc. Frangible powdered iron projectiles
AU754891B2 (en) * 1997-08-08 2002-11-28 R A Brands, Llc Frangible powdered iron projectiles
WO1999008063A1 (en) * 1997-08-08 1999-02-18 Remington Arms Company, Inc. Frangible powdered iron projectiles
WO2000055569A3 (en) * 1999-03-08 2001-03-08 Harold F Beal A multi-part projectile and method of making
EP1161651A4 (en) * 1999-03-08 2002-09-04 Harold F Beal MANUFACTURING METHOD FOR A BULLET MADE FROM MULTIPLE PARTS, AND A BULLET PRODUCED BY SUCH A METHOD
US20040200340A1 (en) * 1999-08-04 2004-10-14 Robinson Peter W. Slug for industrial ballistic tool
US7159519B2 (en) 1999-08-04 2007-01-09 Olin Corporation Slug for industrial ballistic tool
US7891299B2 (en) 1999-08-04 2011-02-22 Olin Corporation Slug for industrial ballistic tool
US6640724B1 (en) 1999-08-04 2003-11-04 Olin Corporation Slug for industrial ballistic tool
US7328658B2 (en) 1999-08-04 2008-02-12 Olin Corporation Slug for industrial ballistic tool
US20110017050A1 (en) * 1999-08-04 2011-01-27 Robinson Peter W Slug for industrial ballistic tool
US20070272112A1 (en) * 2000-02-23 2007-11-29 Alliant Techsystems Inc. Reactive material compositions, shot shells including reactive materials, and a method of producing same
US9982981B2 (en) 2000-02-23 2018-05-29 Orbital Atk, Inc. Articles of ordnance including reactive material enhanced projectiles, and related methods
USRE45899E1 (en) 2000-02-23 2016-02-23 Orbital Atk, Inc. Low temperature, extrudable, high density reactive materials
US9103641B2 (en) 2000-02-23 2015-08-11 Orbital Atk, Inc. Reactive material enhanced projectiles and related methods
US7977420B2 (en) 2000-02-23 2011-07-12 Alliant Techsystems Inc. Reactive material compositions, shot shells including reactive materials, and a method of producing same
WO2001069165A3 (en) * 2000-03-08 2002-02-28 Harold F Beal A multi-part projectile and method of making
WO2002044645A1 (en) * 2000-11-03 2002-06-06 Nammo Raufoss As Projectile containing a heavy core surrounded by a jacket
US20060266249A1 (en) * 2003-07-04 2006-11-30 Giuliano Illesi Method of making inactive ballistic exercise elements and inactive ballistic element made by said method
US7644663B2 (en) * 2003-07-04 2010-01-12 Industria Meccanica Zane' SRL Method of making inactive ballistic exercise elements and inactive ballistic element made by said method
US8361258B2 (en) 2004-03-15 2013-01-29 Alliant Techsystems Inc. Reactive compositions including metal
US20080229963A1 (en) * 2004-03-15 2008-09-25 Alliant Techsystems Inc. Reactive material enhanced munition compositions and projectiles containing same
US20100276042A1 (en) * 2004-03-15 2010-11-04 Alliant Techsystems Inc. Reactive compositions including metal
US8568541B2 (en) 2004-03-15 2013-10-29 Alliant Techsystems Inc. Reactive material compositions and projectiles containing same
US8075715B2 (en) 2004-03-15 2011-12-13 Alliant Techsystems Inc. Reactive compositions including metal
US7418904B2 (en) 2005-01-17 2008-09-02 I.M.Z. S.P.A. Inert ballistic element and process of manufacture
US20060243154A1 (en) * 2005-01-17 2006-11-02 Giuliano Illesi Manufacturing process of an inert ballistic element for training purposes and the inert ballistic element manufactured by said process
US8122833B2 (en) 2005-10-04 2012-02-28 Alliant Techsystems Inc. Reactive material enhanced projectiles and related methods
US20080035007A1 (en) * 2005-10-04 2008-02-14 Nielson Daniel B Reactive material enhanced projectiles and related methods
US8196571B2 (en) 2006-03-10 2012-06-12 Jenson Martin W Apparatus, system, and method for launching a granular substance
US20100288255A1 (en) * 2006-03-10 2010-11-18 Jenson Martin W Apparatus, system, and method for launching a granular substance
US20100212535A1 (en) * 2007-07-11 2010-08-26 Beal Harold F Traceable Frangible Projectile
US8393273B2 (en) 2009-01-14 2013-03-12 Nosler, Inc. Bullets, including lead-free bullets, and associated methods
US20160091290A1 (en) * 2014-09-29 2016-03-31 Pm Ballistics Llc Lead free frangible iron bullets
US11674781B2 (en) * 2014-09-29 2023-06-13 TPI Powder Metallurgy, Inc. Lead free frangible iron bullets

Also Published As

Publication number Publication date
GB1135917A (en) 1968-12-11
DK112073B (da) 1968-11-04
BE695321A (forum.php) 1967-08-14
FR1513883A (fr) 1968-02-16
NL6702996A (forum.php) 1967-09-12
DE1286703B (de) 1969-01-09
AT278593B (de) 1970-02-10
CH445035A (de) 1967-10-15

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