GB1331687A - Wad structures for cartridges methods of forming such struc tures and cartridges including such structures - Google Patents

Wad structures for cartridges methods of forming such struc tures and cartridges including such structures

Info

Publication number
GB1331687A
GB1331687A GB3071871A GB3071871A GB1331687A GB 1331687 A GB1331687 A GB 1331687A GB 3071871 A GB3071871 A GB 3071871A GB 3071871 A GB3071871 A GB 3071871A GB 1331687 A GB1331687 A GB 1331687A
Authority
GB
United Kingdom
Prior art keywords
wad
structures
polyethylene
plastics material
cartridges
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
Application number
GB3071871A
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Publication of GB1331687A publication Critical patent/GB1331687A/en
Expired 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
    • F42B7/00—Shotgun ammunition
    • F42B7/02—Cartridges, i.e. cases with propellant charge and missile
    • F42B7/08—Wads, i.e. projectile or shot carrying devices, therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
    • B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Buffer Packaging (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

1331687 Injection moulding cartridge cases OLIN CORP 30 June 1971 [4 Dec 1970] 30718/71 Heading B5A [Also in Division F3] A method of manufacturing a wad for a shotgun cartridge comprises injecting a mixture of molten plastics material and a foaming agent through a sprue 86 into the mould cavity 84, cooling the cavity to cool a portion of the plastics material whilst retaining the remainder in a molten state, moving the plug 92 and plunger 96 to the right to permit foaming to occur, and solidifying the foamed portion to provide an integral foam cushion. The cushion is arranged to have a density 20-60% of that of the solid parts of the wad and is in the range 10-35 lb./ft<SP>3</SP>. The wad is removed from the plug 92 by relative movement of the plunger 96. The plastics material comprises ethylene-vinyl acetate co-polymer, a co-opolymer of ethyl acetate, polyethylene, polypropylene, polyvinyl chloride, a copolymer of vinyl acetate, a copolymer of polyethylene and butyl rubber, and mixtures thereof. The foaming agent comprises azondicarbonamide, P,P<SP>1</SP>-oxybis (benzene sulphonyl hydrazide), azobis (isobutyronitrile), and N,N<SP>1</SP>- dinitroso-penta-methylenetetramine, and mixtures thereof. In an example a molten mixture of 99% polyethylene-vinylacetate copolymer and 1% azodicarbonamide is fed into the mould cavity at 5000 p.s.i. and, after cooling, the pressure is reduced to 500 p.s.i. to allow foaming to occur.
GB3071871A 1970-12-04 1971-06-30 Wad structures for cartridges methods of forming such struc tures and cartridges including such structures Expired GB1331687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9507370A 1970-12-04 1970-12-04

Publications (1)

Publication Number Publication Date
GB1331687A true GB1331687A (en) 1973-09-26

Family

ID=22249290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3071871A Expired GB1331687A (en) 1970-12-04 1971-06-30 Wad structures for cartridges methods of forming such struc tures and cartridges including such structures

Country Status (6)

Country Link
US (1) US3721197A (en)
AU (1) AU3179571A (en)
DE (1) DE2155167A1 (en)
ES (2) ES196782Y (en)
FR (1) FR2117252A5 (en)
GB (1) GB1331687A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978794A (en) * 1973-12-28 1976-09-07 Giulio Fiocchi, S.P.A. Base wad for shotshells
ZA78670B (en) * 1978-02-03 1979-11-28 Andre Theodor Dreyer Shotshells
US4291625A (en) * 1979-03-02 1981-09-29 Stagg Jr George A Shot gun shell construction
US4864934A (en) * 1988-12-12 1989-09-12 Olin Corporation Industrial shotshell having a load-stabilizing assembly
CN1229382A (en) * 1996-09-13 1999-09-22 智索股份有限公司 Method of injection molding expandable plastic composition
JP3814032B2 (en) * 1996-11-01 2006-08-23 本田技研工業株式会社 Molding
US5970878A (en) * 1997-12-15 1999-10-26 Olin Corporation Universal shot wad
GB0018593D0 (en) * 2000-07-28 2000-09-13 Brydges Price Richard I Projectile for delivery of a tranquilliser
US20060278114A1 (en) * 2005-05-16 2006-12-14 Hornady Manufacturing Company Shotgun shell with slug
US8276519B2 (en) * 2005-11-17 2012-10-02 Polywad, Inc. Wad-less cartridges and method of manufacturing the same
US7814820B2 (en) * 2005-11-17 2010-10-19 Jay Menefee Method and apparatus for manufacturing wad-less ammunition
US8800449B2 (en) 2008-10-27 2014-08-12 Ra Brands, L.L.C. Wad with ignition chamber
AU2009320150B2 (en) * 2008-10-27 2014-09-25 Ra Brands, L.L.C Wad with ignition chamber
US8555785B2 (en) * 2009-02-02 2013-10-15 Ra Brands, L.L.C. Shotshell wad with shot confinement feature
US20130228090A1 (en) * 2011-11-21 2013-09-05 Alliant Techsystems Inc. Shotgun shell with weighted wad
US9372057B2 (en) * 2013-03-12 2016-06-21 Wendell Diller Shotgun shell tracer and tracer manufacturing device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186659A (en) * 1957-11-22 1959-08-31 Rhone Alpes Soc Ind Wad for firearms ammunition
DE1113395B (en) * 1960-02-22 1961-08-31 Rheinmetall Gmbh Maneuver cartridge with a charge of gunpowder that can be fired
FR1262020A (en) * 1960-04-15 1961-05-26 Cartoucherie Francaise Two-use wad for hunting cartridges
US3266421A (en) * 1962-06-25 1966-08-16 Ronald W Comerford Pouch-wad
FR1408820A (en) * 1964-06-30 1965-08-20 Combination concentrator wad for firearm cartridges
US3558751A (en) * 1964-07-22 1971-01-26 Owens Illinois Inc Method of making a foamed container having an integral neck portion
DE6605055U (en) * 1966-01-26 1970-04-02 Hirtenberger Patronen INTERMEDIATE PLASTIC PLUG FOR SCRAP CARTRIDGES
US3444777A (en) * 1967-03-20 1969-05-20 Frederick A Lage Method for loading a shot shell

Also Published As

Publication number Publication date
AU3179571A (en) 1973-02-01
FR2117252A5 (en) 1972-07-21
ES196782U (en) 1975-04-16
ES397134A1 (en) 1974-05-01
ES196782Y (en) 1975-08-16
DE2155167A1 (en) 1972-06-15
US3721197A (en) 1973-03-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee