US3048105A - Aluminum alloy cartridge case - Google Patents

Aluminum alloy cartridge case Download PDF

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Publication number
US3048105A
US3048105A US763414A US76341458A US3048105A US 3048105 A US3048105 A US 3048105A US 763414 A US763414 A US 763414A US 76341458 A US76341458 A US 76341458A US 3048105 A US3048105 A US 3048105A
Authority
US
United States
Prior art keywords
cartridge case
aluminum alloy
lacquer
oxide layer
mouth
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.)
Expired - Lifetime
Application number
US763414A
Other languages
English (en)
Inventor
Schlatter Walter
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.)
Press- and Stanzwerk AG
PRESS AND STANZWERK AG
Original Assignee
PRESS AND STANZWERK AG
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 PRESS AND STANZWERK AG filed Critical PRESS AND STANZWERK AG
Application granted granted Critical
Publication of US3048105A publication Critical patent/US3048105A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B5/26—Cartridge cases
    • F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal
    • 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

Definitions

  • the thickness of the said oxide layer cannot be increased to this value required for an absolute protection of the case because the deformations which occur at the mouth of the case when the projectile is inserted therein, produces a strain which overstresses and damages such thick oxide layers.
  • the damaged oxide layer, crossed by fine cracks, has not proved to afford sufi'icient protection against the erosive hot combustion gases.
  • an aluminum alloy cartridge case comprising in combination: an aluminum alloy cartridge case proper, an oxide layer covering said case, and a lacquer layer at least partly covering the said oxide layer.
  • the said lacquer I layer is composed of a synthetic resin layer based on ethoxylene (epoxy) resin.
  • such a lacquer prevents cracking resulting from the deformation which occurs at the mouth of the cartridge case when the projectile is driven into said mouth and said lacquer also cooperates with said oxide layer to provide the protection of the metal that is required and desired against corrosion as well as against the erosion and burning out of the mouth of the case when firing a shot.
  • the drawing illustrates a cartridge case made according to the invention.
  • the method I provide according to the present invention comprises the following consecutive steps: producing an oxide layer by anodic oxidation on an aluminum alloy cartridge case, dipping the said anodised cartridge case into a lacquer bath, removing excess lacquer from the said cartridge case by dripping and centrifuging, drying the lacquer remaining on the surface of the said cartridge case by heating to a medium temperature for a moderate period, dipping the said cartridge case a second time in the said lacquer bath, removing again excess lacquer by dripping and centrifuging, and baking-in the said lacquer on the said cartridge case for a prolonged period.
  • the lacquer is applied at a viscosity determined by the time for flowing ofi a Ford beaker at room temperature.
  • the cartridge case proper consists for example of an aluminum alloy of the kind Al-Zn-Mg-Cu 54.
  • This cartridge case proper is covered by an oxide layer of a thickness of 15 to 20,11..
  • This oxide layer is covered by a lacquer layer of a thickness of 15 to 25.
  • an oxide layer of 15 to 20,1 is produced by anodic oxidation. Densifying of this oxide layer by a known sealing process is preferably dispensed with.
  • the said oxidised cartridge case proper is dipped a first time into a lacquer bath, and after removing the excess lacquer, the oxidised cartridge case is dried for 20 minutes at an oven temperature of C. Subsequently the cartridge case is dipped into the said lacquer bath a second time, excess lacquer is again removedby dripping and centrifuging, and the adhering lacquer is baked-in by heating for one hour at an oven temperature of
  • the lacquer is preferably applied at a viscosity defined by the period of 27 to 28 seconds required for flowing out of a Ford beaker No. 4, measured at a room temperature of 20 C.
  • the lacquer layer produced should preferably have a thickness of 15 to 25p.
  • a cartridge case comprising in combination, an aluminum alloy case proper with a mouth at one end adapted to be closed by a projectile, and means for protecting said mouth from the detrimental effects of the hot combustion gases when firing, said means comprising at anodic oxide layer having a thickness of about 15 tc about 20 and a layer of resin having good sliding properties baked on the surface of said oxide layer, saic layers covering at least the outside of said cartridge case and the inside of said mouth.
  • a method for manufacturing cartridge cases com prising the following consecutive steps: providing an alu minum alloy cartridge case, producing by anodic oxida tion an oxide layer on said cartridge case, said OXidt layer having a thickness of about 15, to about 20 dip ping the oxide coated case into a bath of resin-base( lacquer, removing excess lacquer and baking the adherim layer thereon.
  • a cartridge case comprising in combination, an alu minum alloy case proper with a mouth at one end adapter to be closed by a projectile and means for protecting sair mouth from the detrimental effects of the hot combustio1 gases when firing, said means comprising an anodic OXldl layer having a thickness of about 15 to about 20 1, an a layer of epoxy resin having good sliding properties said layers covering at least the outside of said cartridg case and the inside of said mouth and being baked on th surface of said oxide layer.
  • a method for manufacturing cartridge cases comprising the following consecutive steps: providing an aluminum alloy cartridge case, producing by anodic oxidation an oxide layer on said cartridge case, said oxide layer having a thickness of about 15,14 to about 2011., dippingthe oxide coated case into a bath of lacquer comprising an epoxy resin, removing excess lacquer and baking the adhering layer thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Paints Or Removers (AREA)
  • Cookers (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US763414A 1957-09-03 1958-08-27 Aluminum alloy cartridge case Expired - Lifetime US3048105A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP19237A DE1049276B (de) 1957-09-03 1957-09-03 Patronenhuelse aus Aluminiumlegierung

Publications (1)

Publication Number Publication Date
US3048105A true US3048105A (en) 1962-08-07

Family

ID=7367382

Family Applications (1)

Application Number Title Priority Date Filing Date
US763414A Expired - Lifetime US3048105A (en) 1957-09-03 1958-08-27 Aluminum alloy cartridge case

Country Status (7)

Country Link
US (1) US3048105A (ko)
BE (1) BE570833A (ko)
CH (1) CH358774A (ko)
DE (1) DE1049276B (ko)
FR (1) FR1198256A (ko)
GB (1) GB858823A (ko)
NL (1) NL99734C (ko)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235961A (en) * 1961-06-12 1966-02-22 British Aluminium Co Ltd Method of producing coated aluminium base alloys
US3797396A (en) * 1972-03-15 1974-03-19 Us Army Reinforced lightweight cartridge
WO2002027262A2 (en) * 2000-09-28 2002-04-04 Superior Ballistics, Inc. Firearm cartridge and case-less chamber
US6672219B2 (en) * 2002-01-04 2004-01-06 Tti Armory, L.L.C. Low observable ammunition casing
US20040237827A1 (en) * 2000-09-28 2004-12-02 Smalley Robert B. Firearm cartridge and case-less chamber
US7210260B1 (en) 2000-09-28 2007-05-01 Robert B. Smalley, Jr. Firearm cartridge and case-less chamber
WO2016005877A1 (en) 2014-07-11 2016-01-14 Jh Casings As Heat insulating coating for aluminium cartridge casings for hand guns
US9908321B1 (en) 2016-04-28 2018-03-06 Kalvani Ip Holdings, Llc Systems and methods for identifying cartridge cases based on ink marking

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29517208U1 (de) * 1995-10-31 1997-02-27 Diehl GmbH & Co, 90478 Nürnberg Hülse für pyrotechnische Ladungen

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862565A (en) * 1928-07-09 1932-06-14 Du Pont Waterproofing composition and articles treated therewith
GB455761A (en) * 1935-03-27 1936-10-27 Aluminium Ind Ag Improvements in and relating to cartridge cases
US2196018A (en) * 1935-08-03 1940-04-02 Schering Ag Cartridge case provided with a nonmetallic surface
GB528114A (en) * 1938-04-13 1940-10-23 Aluminium Ind Ag Improvements in and relating to the manufacture of light metal cartridge cases
US2448397A (en) * 1944-06-07 1948-08-31 Remington Arms Co Inc Corrosion resistant coated steel
US2703529A (en) * 1947-08-29 1955-03-08 Arnold J Tuckerman Lining for perforated cartridge cases
US2901510A (en) * 1956-08-16 1959-08-25 Velsicol Chemical Corp Hexachloro-5-phenyldiamine bicyclo-(2.2.1)-2-heptene
US2919647A (en) * 1953-05-25 1960-01-05 Olin Mathieson Ammunition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR374353A (fr) * 1906-11-19 1907-06-11 Centralstelle Fuer Wissenschaf Douilles de cartouches et de gargousses en alliage d'aluminium
DE726768C (de) * 1937-07-24 1942-10-20 E H Adolf Wirtz Dr Ing Schutzueberzug fuer Exerziermunition

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862565A (en) * 1928-07-09 1932-06-14 Du Pont Waterproofing composition and articles treated therewith
GB455761A (en) * 1935-03-27 1936-10-27 Aluminium Ind Ag Improvements in and relating to cartridge cases
US2196018A (en) * 1935-08-03 1940-04-02 Schering Ag Cartridge case provided with a nonmetallic surface
GB528114A (en) * 1938-04-13 1940-10-23 Aluminium Ind Ag Improvements in and relating to the manufacture of light metal cartridge cases
US2448397A (en) * 1944-06-07 1948-08-31 Remington Arms Co Inc Corrosion resistant coated steel
US2703529A (en) * 1947-08-29 1955-03-08 Arnold J Tuckerman Lining for perforated cartridge cases
US2919647A (en) * 1953-05-25 1960-01-05 Olin Mathieson Ammunition
US2901510A (en) * 1956-08-16 1959-08-25 Velsicol Chemical Corp Hexachloro-5-phenyldiamine bicyclo-(2.2.1)-2-heptene

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235961A (en) * 1961-06-12 1966-02-22 British Aluminium Co Ltd Method of producing coated aluminium base alloys
US3797396A (en) * 1972-03-15 1974-03-19 Us Army Reinforced lightweight cartridge
US20040237827A1 (en) * 2000-09-28 2004-12-02 Smalley Robert B. Firearm cartridge and case-less chamber
US6523475B2 (en) * 2000-09-28 2003-02-25 Superior Ballistics, Inc. Firearm cartridge and case-less chamber
WO2002027262A3 (en) * 2000-09-28 2003-04-03 Superior Ballistics Inc Firearm cartridge and case-less chamber
WO2002027262A2 (en) * 2000-09-28 2002-04-04 Superior Ballistics, Inc. Firearm cartridge and case-less chamber
US6832556B1 (en) * 2000-09-28 2004-12-21 Superior Ballistics, Inc. Passive coatings and improved configurations for gun cartridges, solid rockets, and caseless ammunition
US7086336B2 (en) 2000-09-28 2006-08-08 Superior Ballistics, Inc. Firearm cartridge and case-less chamber
US7210260B1 (en) 2000-09-28 2007-05-01 Robert B. Smalley, Jr. Firearm cartridge and case-less chamber
US6672219B2 (en) * 2002-01-04 2004-01-06 Tti Armory, L.L.C. Low observable ammunition casing
WO2016005877A1 (en) 2014-07-11 2016-01-14 Jh Casings As Heat insulating coating for aluminium cartridge casings for hand guns
NO337960B1 (no) * 2014-07-11 2016-07-18 Jh Casings As Varmeisolerende belegg for aluminium patronhylser for skytevåpen
US10359261B2 (en) 2014-07-11 2019-07-23 Jh Casings As Heat insulating coating for aluminium cartridge casings for hand guns
EP3550254A1 (en) 2014-07-11 2019-10-09 JH Casings AS Heat insulating coating for aluminium cartridge casings for hand guns
US9908321B1 (en) 2016-04-28 2018-03-06 Kalvani Ip Holdings, Llc Systems and methods for identifying cartridge cases based on ink marking

Also Published As

Publication number Publication date
NL99734C (ko) 1961-11-15
DE1049276B (de) 1959-01-22
FR1198256A (fr) 1959-12-07
CH358774A (de) 1961-12-15
GB858823A (en) 1961-01-18
BE570833A (ko) 1958-09-30

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