US20040011237A1 - Plastic cartridge case and device for the production thereof - Google Patents

Plastic cartridge case and device for the production thereof Download PDF

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Publication number
US20040011237A1
US20040011237A1 US10/399,795 US39979503A US2004011237A1 US 20040011237 A1 US20040011237 A1 US 20040011237A1 US 39979503 A US39979503 A US 39979503A US 2004011237 A1 US2004011237 A1 US 2004011237A1
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US
United States
Prior art keywords
cartridge case
primer
opening
plastic
forming
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.)
Abandoned
Application number
US10/399,795
Inventor
Eduard Khvichia
Khvichia Eduardovich
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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 US20040011237A1 publication Critical patent/US20040011237A1/en
Abandoned 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
    • F42B7/00—Shotgun ammunition
    • F42B7/02—Cartridges, i.e. cases with propellant charge and missile
    • F42B7/06—Cartridges, i.e. cases with propellant charge and missile with cartridge case of plastics
    • 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
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics

Definitions

  • the present invention generally relates to small arms technology and, more particularly, is concerned with hunting and sporting cartridges with plastic cases.
  • the main drawback of the existing case is its low structural strength—the case breaks down during shooting. Internal surface geometry of the case and its processing technique do not provide structural strength because of casting defects.
  • the drawback of the device for manufacturing of the case is that the cylindrical pin is arranged on the punch what leads to declination from axis during the casting of matrix by working mass resulting in the case geometry failure and reduction of structural strength.
  • the objective of the invention is increasing of the ballistic data and structural strength of the product with low price of its manufacturing.
  • the device for manufacturing of the plastic cartridge case contains a mold performed of a matrix forming the external surface of the cartridge case, a halfmatrix with a conical casting opening which forms the cup bottom and a punch forming the internal surface of the cartridge case.
  • a halfmatrix On the halfmatrix is a cylindrical hollow pin forming a closed primer opening. The cylindrical hollow pin together with punch form a ring sprue.
  • the cartridge case is shaped as the cup 1 with internal surface 2 comprising three conical portions.
  • the primer opening 4 At the bottom 3 is the primer opening 4 . Inside of the cup (around the opening 4 ) there is a compensation groove 5 . A recess 6 performed concentrically with the opening 4 on the outside surface of the bottom 3 .
  • cup (cartridge case) part and part for the primer installation is divided by the dam-diaphragm 7 .
  • the device for manufacturing of the plastic cartridge case consists of the matrix 8 , the halfmatrix 9 and the punch 10 .
  • the cylindrical hollow pin 11 forms the closed primer opening.
  • the ring sprue 12 is between the surface of the pin 11 and the surface of the punch 10 .
  • the plastic mass is supplied from the distribution block (not shown on the picture) into the cylindrical opening of the halfmatrix 9 , then through the pin 11 and the ring sprue 12 penetrates into the mold filling full its space uniformly excluding appearance of defects. After taking the finished cartridge case out of the mold, unnecessary part of pour is removed leaving the dam between the parts of the cartridge case.
  • the cartridge case manufactured according to this method has the following advantages.
  • the cartridge case has improved structural strength characteristics. Division of the cartridge case parts: the primer part and the combustion part results in improvement of ballistic characteristics of the cartridge case due to exclusion of powder charge effect on burning intensity of the primer and ignition process improvement.
  • the thickness of the dam-diaphragm should be selected within the range of 0,2-0,5 mm.
  • the described cartridge case has improved structural strength characteristics, low manufacturing price, shorter range of spread of filled cartridge parameters of powder charge pressure and shot speed.

Abstract

The present invention generally relates to small arms technology and more particularly, is concerned with hunting and sporting cartridges having plastic cases.
The objective of the invention is increasing of the ballistic data and structural strength of the product with low price of its manufacturing.
This problem is solved by supplying of the plastic cartridge case in the shape of thin-walled cup of cylindrical external surface and internal surface comprising three conical portions of length and taper increasing from the bottom having the opening for the primer with a dam-diaphragm separating the cartridge case part and the part for the primer installation. The dam-diaphragm thickness is selected within the range of 0,2-0,5 mm.
The device for manufacturing of the plastic cartridge case contains a mold performed of a matrix forming the external surface of the cartridge case, a halfmatrix with conical casting opening which forms the cup bottom and a punch forming the internal surface of the cartridge case. On the halfmatrix is a cylindrical hollow pin forming a closed primer opening. The cylindrical hollow pin together with the punch form a ring sprue.

Description

  • The present invention generally relates to small arms technology and, more particularly, is concerned with hunting and sporting cartridges with plastic cases. [0001]
  • There are known plastic cases for sporting and hunting cartridges in the shape of thin-walled cup of cylindrical external surface and with opening at the bottom for primer (Patent UK 1161422, F 42B 5/30, published in 1969). [0002]
  • Known from this source device for manufacturing of plastic cartridge case composes of a mold and a distribution block with casting openings. [0003]
  • The main drawback of the existing case is its low structural strength—the case breaks down during shooting. Internal surface geometry of the case and its processing technique do not provide structural strength because of casting defects. [0004]
  • These defects are not peculiar to the existing plastic cartridge case with internal surface comprising three conical portions of length and taper increasing from the bottom (Certificate for useful model RU 11882, F 42 [0005] B 5/30, 1999—closest analog). The device for manufacturing of the case is described in this source.
  • The drawback of the existing case is penetration of powder corpuscles into the primer during the filling of the cartridge resulting in failure of ignition and cartridge parameters spread. [0006]
  • The drawback of the device for manufacturing of the case is that the cylindrical pin is arranged on the punch what leads to declination from axis during the casting of matrix by working mass resulting in the case geometry failure and reduction of structural strength. [0007]
  • The objective of the invention is increasing of the ballistic data and structural strength of the product with low price of its manufacturing. [0008]
  • This problem is solved by additional supplying of the plastic cartridge case in the shape of thin-walled cup of cylindrical external surface and internal surface comprising three conical portions of length and taper increasing from the bottom having the opening for the primer with a dam-diaphragm separating the cartridge case part and the part for the primer installation. The dam-diaphragm thickness is selected within the range of 0,2-0,5 mm.[0009]
  • The device for manufacturing of the plastic cartridge case contains a mold performed of a matrix forming the external surface of the cartridge case, a halfmatrix with a conical casting opening which forms the cup bottom and a punch forming the internal surface of the cartridge case. On the halfmatrix is a cylindrical hollow pin forming a closed primer opening. The cylindrical hollow pin together with punch form a ring sprue. [0010]
  • The longitudinal section of the cartridge case is shown on picture [0011] 1 and section of the device for manufacturing of the plastic cartridge case is shown on picture 2.
  • The cartridge case is shaped as the cup [0012] 1 with internal surface 2 comprising three conical portions.
  • At the [0013] bottom 3 is the primer opening 4. Inside of the cup (around the opening 4) there is a compensation groove 5. A recess 6 performed concentrically with the opening 4 on the outside surface of the bottom 3.
  • The cup (cartridge case) part and part for the primer installation is divided by the dam-diaphragm [0014] 7.
  • The device for manufacturing of the plastic cartridge case consists of the [0015] matrix 8, the halfmatrix 9 and the punch 10. Made on the halfmatrix the cylindrical hollow pin 11 forms the closed primer opening. The ring sprue 12 is between the surface of the pin 11 and the surface of the punch 10.
  • The manufacturing process of the cartridge case is as follows: [0016]
  • The plastic mass is supplied from the distribution block (not shown on the picture) into the cylindrical opening of the halfmatrix [0017] 9, then through the pin 11 and the ring sprue 12 penetrates into the mold filling full its space uniformly excluding appearance of defects. After taking the finished cartridge case out of the mold, unnecessary part of pour is removed leaving the dam between the parts of the cartridge case.
  • The cartridge case manufactured according to this method has the following advantages. [0018]
  • The cartridge case has improved structural strength characteristics. Division of the cartridge case parts: the primer part and the combustion part results in improvement of ballistic characteristics of the cartridge case due to exclusion of powder charge effect on burning intensity of the primer and ignition process improvement. [0019]
  • Proceeding from the tests the thickness of the dam-diaphragm should be selected within the range of 0,2-0,5 mm. The described cartridge case has improved structural strength characteristics, low manufacturing price, shorter range of spread of filled cartridge parameters of powder charge pressure and shot speed. [0020]

Claims (2)

1. A plastic cartridge case, performed in a shape of a thin-walled cup having a cylindrical external surface and an internal surface performed of three conical portions of length and a taper increasing from a bottom with an opening for a primer, characterized that comprising a dam-diaphragm of 0,2-0,5 mm thickness separating a cartridge case part and a part for the primer installation.
2. A device for a plastic cartridge case manufacturing, comprising a mold performed of a matrix forming an external surface of the cartridge case, a half matrix with a conical casting opening which forms a cup bottom and a punch forming an internal surface of cartridge case, characterized that a hollow pin is carried out on the half matrix, forming a closed primer opening and, together with the punch forming a ring sprue.
US10/399,795 2001-05-17 2002-05-15 Plastic cartridge case and device for the production thereof Abandoned US20040011237A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2001113116 2001-05-17
RU2001113116/02A RU2184338C1 (en) 2001-05-17 2001-05-17 Plastic cartridge case and device for its manufacture
PCT/RU2002/000232 WO2002093103A1 (en) 2001-05-17 2002-05-15 Plastic cartridge case and device for the production thereof

Publications (1)

Publication Number Publication Date
US20040011237A1 true US20040011237A1 (en) 2004-01-22

Family

ID=20249609

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/399,795 Abandoned US20040011237A1 (en) 2001-05-17 2002-05-15 Plastic cartridge case and device for the production thereof

Country Status (21)

Country Link
US (1) US20040011237A1 (en)
EP (1) EP1388726B1 (en)
KR (1) KR100550682B1 (en)
CN (1) CN100370215C (en)
AT (1) ATE447156T1 (en)
AU (1) AU2002304212B2 (en)
BR (1) BR0205393B1 (en)
CA (1) CA2417847C (en)
CZ (1) CZ2003233A3 (en)
DE (1) DE60234175D1 (en)
EA (1) EA004026B1 (en)
ES (1) ES2334214T3 (en)
HU (1) HUP0600672A2 (en)
LT (1) LT5117B (en)
LV (1) LV13107B (en)
PL (1) PL197457B1 (en)
PT (1) PT1388726E (en)
RU (1) RU2184338C1 (en)
UA (1) UA74403C2 (en)
WO (1) WO2002093103A1 (en)
ZA (1) ZA200301238B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119115A1 (en) * 2007-03-30 2008-10-09 Techventure Investments Pty Ltd A method of manufacturing ammunition
US20090145320A1 (en) * 2004-04-02 2009-06-11 Leslie Mervyn Harrison Projectile
US7921780B2 (en) 2004-04-02 2011-04-12 Techventure Investments Pty Ltd Projectile
US8443730B2 (en) 2011-01-14 2013-05-21 Pcp Tactical, Llc High strength polymer-based cartridge casing 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
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
US10012485B1 (en) * 2017-02-15 2018-07-03 Micron Products, Inc. Integrated burst disc for high/low propulsion ordnance
US10794671B2 (en) 2011-01-14 2020-10-06 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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090183628A1 (en) * 2008-01-18 2009-07-23 Jones D Patrick Dual sided and dual process bandolier
US8176826B2 (en) 2004-08-18 2012-05-15 Penn United Technologies, Inc. Bandolier with laterally offset and spaced work piece
FR2911729A1 (en) * 2007-01-19 2008-07-25 Airbus France Sas Electrical cable stripping and reforming assisting tool i.e. cutting plier, has body including recess arranged at body end, where shape of recess is defined by utilization of tool and diameter of recess is lower than diameter of narrow part
SI25386A (en) 2017-02-20 2018-08-31 AREX Proizvodnja orodij, naprav in storitve d.o.o. Ĺ entjernej Cartridge
CN113916062A (en) * 2020-07-07 2022-01-11 东莞梵铃材料科技有限公司 Armor piercing bullet and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US513997A (en) * 1894-02-06 Cartridge
US3093073A (en) * 1959-08-31 1963-06-11 Harry A Lockwood Shell for guns
US3611938A (en) * 1969-06-24 1971-10-12 Federal Cartridge Corp Plastic shot shell
US3732820A (en) * 1971-06-28 1973-05-15 G Hendricks Ball anvil primer
US4315462A (en) * 1979-09-10 1982-02-16 Vollers Gary L Shot gun shell primer

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DE1071940B (en) * 1953-01-30
US2953990A (en) * 1953-12-11 1960-09-27 Olin Mathieson Ammunition
BE540698A (en) * 1954-09-04
FR1428443A (en) * 1964-03-18 1966-02-11 Cartridge refinements
FR1442932A (en) * 1964-08-12 1966-06-17 Mueanyagipari Ki Plastic cartridge cases
SE343137B (en) 1965-12-03 1972-02-28 Blanicke Strojirny Np
US3477374A (en) * 1968-04-11 1969-11-11 Aai Corp Fixed primer set-back cartridge
US3559581A (en) * 1968-12-05 1971-02-02 Blanicke Strojirny Np Method of manufacture of thin-walled plastic shell casings
DE2327947A1 (en) * 1973-06-01 1974-12-19 Dynamit Nobel Ag FIREWORKS
US4867066A (en) * 1988-10-21 1989-09-19 Olin Corporation Shotshell casing with reduced volume basewad and increased interior volume for larger shot loads
RU11882U1 (en) * 1999-08-16 1999-11-16 Георгий Эдуардович Хвичия PLASTIC CARTRIDGE SHELL AND DEVICE FOR ITS MANUFACTURE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US513997A (en) * 1894-02-06 Cartridge
US3093073A (en) * 1959-08-31 1963-06-11 Harry A Lockwood Shell for guns
US3611938A (en) * 1969-06-24 1971-10-12 Federal Cartridge Corp Plastic shot shell
US3732820A (en) * 1971-06-28 1973-05-15 G Hendricks Ball anvil primer
US4315462A (en) * 1979-09-10 1982-02-16 Vollers Gary L Shot gun shell primer

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090145320A1 (en) * 2004-04-02 2009-06-11 Leslie Mervyn Harrison Projectile
US7921780B2 (en) 2004-04-02 2011-04-12 Techventure Investments Pty Ltd Projectile
US20080257139A1 (en) * 2005-03-31 2008-10-23 Leslie Mervyn Harrison Method of manufacturing ammunition
US7665402B2 (en) 2005-03-31 2010-02-23 Techventure Investments Pty Ltd. Method of manufacturing ammunition
WO2008119115A1 (en) * 2007-03-30 2008-10-09 Techventure Investments Pty Ltd A method of manufacturing ammunition
US9989343B2 (en) 2010-07-30 2018-06-05 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US9599443B2 (en) 2010-07-30 2017-03-21 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US8875633B2 (en) 2011-01-14 2014-11-04 Pcp Tactical, Llc Adhesive lip 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
US8869702B2 (en) 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US8807008B2 (en) 2011-01-14 2014-08-19 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US9003973B1 (en) 2011-01-14 2015-04-14 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and 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
US11353299B2 (en) 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US10794671B2 (en) 2011-01-14 2020-10-06 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing 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
US9995561B2 (en) 2011-01-14 2018-06-12 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge for blank and subsonic ammunition
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
US10012485B1 (en) * 2017-02-15 2018-07-03 Micron Products, Inc. Integrated burst disc for high/low propulsion ordnance
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios

Also Published As

Publication number Publication date
RU2184338C1 (en) 2002-06-27
CN100370215C (en) 2008-02-20
CN1463354A (en) 2003-12-24
WO2002093103A8 (en) 2003-03-20
EP1388726A4 (en) 2007-08-08
ES2334214T3 (en) 2010-03-08
PL197457B1 (en) 2008-04-30
UA74403C2 (en) 2005-12-15
AU2002304212B8 (en) 2002-11-25
BR0205393A (en) 2003-06-10
EP1388726B1 (en) 2009-10-28
KR20030020934A (en) 2003-03-10
PL361778A1 (en) 2004-10-04
DE60234175D1 (en) 2009-12-10
PT1388726E (en) 2009-12-23
HUP0600672A2 (en) 2007-03-28
EA004026B1 (en) 2003-12-25
EA200300405A1 (en) 2003-08-28
KR100550682B1 (en) 2006-02-09
LT2003054A (en) 2003-11-25
LT5117B (en) 2004-03-25
WO2002093103A1 (en) 2002-11-21
BR0205393B1 (en) 2011-02-22
EP1388726A1 (en) 2004-02-11
AU2002304212B2 (en) 2007-07-19
ZA200301238B (en) 2004-02-25
LV13107B (en) 2004-05-20
ATE447156T1 (en) 2009-11-15
CA2417847C (en) 2005-12-06
CZ2003233A3 (en) 2004-01-14
CA2417847A1 (en) 2002-11-21

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