CA2445073A1 - Lead-free projectiles - Google Patents

Lead-free projectiles Download PDF

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Publication number
CA2445073A1
CA2445073A1 CA002445073A CA2445073A CA2445073A1 CA 2445073 A1 CA2445073 A1 CA 2445073A1 CA 002445073 A CA002445073 A CA 002445073A CA 2445073 A CA2445073 A CA 2445073A CA 2445073 A1 CA2445073 A1 CA 2445073A1
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CA
Canada
Prior art keywords
jacket
metal
polymer
projectile
powder
Prior art date
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.)
Granted
Application number
CA002445073A
Other languages
French (fr)
Other versions
CA2445073C (en
Inventor
Anthony Joseph Cesaroni
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2445073A1 publication Critical patent/CA2445073A1/en
Application granted granted Critical
Publication of CA2445073C publication Critical patent/CA2445073C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Toys (AREA)

Abstract

A lead-free projectile having a metal jacket (10) with a tip in the form of a truncated parabellum. The metal jacket (10) is partially filled with cold-pressed metal powder (18), the remainder of the metal jacket being filled with metal-filled polymer (26). The metal-filled polymer (26) extends through the truncated parabellum and forms a tip on the projectile. A projectile (bullet) having a higher grain is obtained. Methods of manufacture are also disclosed.

Claims (22)

1. A lead-free projectile having a metal jacket with a tip in the form of a truncated parabellum, said metal jacket being partially filled with cold-pressed metal powder,the remainder of the metal jacket being filled with metal-filled polymer, said metal-filled polymer extending through the truncated parabellum and forming a tip on said projectile.
2. The lead-free projectile of Claim 1 in which the projectile is a bullet.
3. The lead-free projectile of Claim 1 in which the jacket is a copper jacket.
4. The lead-free projectile of Claim 1 in which the metal powder is copper or tungsten.
5. The lead-free projectile of Claim 1 in which the metal-filled polymer is an amorphous or low crystallinity polymer filled with particles of copper, tungsten, bismuth, tin and/or stainless steel.
6. The lead-free projectile of Claim 5 in which the polymer is selected from the group consisting of ethylene/methacrylic acid copolymer ionomer, polyetherester elastomers and polyamide.
7. A method of forming a lead-free projectile, comprising:
(a) placing a pre-formed open ended metal jacket in a mould, said jacket being formable under pressure;
(b) adding a pre-determined amount of metal powder into said jacket;
(c) compacting said powder by cold pressing the powder in the jacket;
(d) forming the open end of the jacket into a truncated parabellum;
and (e) filling the jacket by injecting a metal-loaded polymer therein and forming a tip of said metal-loaded polymer on the projectile exterior to the truncated parabellum.
8. The method of Claim 7 in which the projectile is a bullet.
9. The method of Claim 7 in which the jacket is a copper jacket.
10.The method of Claim 7 in which the metal powder is copper or tungsten.
11. The method of Claim 7 in which the metal-filled polymer is an amorphous or low crystallinity polymer filled with particles of copper, tungsten, bismuth, tin and/or stainless steel.
12. The method of Claim 13 in which the polymer is selected from the group consisting of ethylene/methacrylic acid copolymer ionomer, polyetherester elastomers or polyamide.
13. A method of forming a lead-free projectile,comprising:
(a) placing a pre-formed open ended metal jacket in a mould,said jacket being formable under pressure;
(b) partially filling the jacket by injecting a metal-loaded polymer therein;
(c) adding metal powder into said jacket;
(d) compacting said powder by cold pressing the powder in the jacket; and (e) closing the open end of the jacket.
14. The method of Claim 13 in which the jacket has a pre-formed truncated parabellum, and a tip of said metal-loaded polymer is formed on the projectile in step (b).
15. The method of Claim 13 in which the projectile is a bullet.
16. The method of Claim 13 in which the jacket is a copper jacket.
17. The method of Claim 13 in which the metal powder is copper or tungsten.
18. The method of Claim 13 in which the metal-filled polymer is an amorphous or low crystallinity polymer filled with particles of copper,tungsten, bismuth, tin and/or stainless steel.
19. The method of Claim 18 in which the polymer is selected from the group consisting of ethylene/methacrylic acid copolymer ionomer, polyetherester elastomers or polyamide,
20. A lead free projectile comprising a preformed metal jacket having an open end and a closed tip end, said metal jacket being filled with cold-pressed powder and said open end being sealed with a metal filled polymer.
21. The projectile of claim 20 wherein the open end of said jacket curves inward to retain the polymer over the powder.
22. A method of forming a lead-free projectile, comprising:
a) providing a pre-formed metal jacket, having an open end and a closed tip end;
b) adding a predetermined amount of metal powder into the jacket through the open end;
c) compacting said powder by cold-pressing the powder in the jacket;
and d) filling the jacket with a metal-loaded polymer thereby closing the open end.
CA2445073A 2001-04-24 2002-04-24 Lead-free projectiles Expired - Fee Related CA2445073C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US28617201P 2001-04-24 2001-04-24
US60/286,172 2001-04-24
PCT/CA2002/000583 WO2002086412A1 (en) 2001-04-24 2002-04-24 Lead-free projectiles

Publications (2)

Publication Number Publication Date
CA2445073A1 true CA2445073A1 (en) 2002-10-31
CA2445073C CA2445073C (en) 2010-02-16

Family

ID=23097408

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2445073A Expired - Fee Related CA2445073C (en) 2001-04-24 2002-04-24 Lead-free projectiles

Country Status (5)

Country Link
US (1) US7607394B2 (en)
EP (1) EP1381821A1 (en)
CA (1) CA2445073C (en)
IL (1) IL158568A0 (en)
WO (1) WO2002086412A1 (en)

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Also Published As

Publication number Publication date
EP1381821A1 (en) 2004-01-21
IL158568A0 (en) 2004-05-12
WO2002086412A1 (en) 2002-10-31
US20040129165A1 (en) 2004-07-08
CA2445073C (en) 2010-02-16
US7607394B2 (en) 2009-10-27

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Effective date: 20190424