CN114264198A - Shell case for subsonic ammunition - Google Patents
Shell case for subsonic ammunition Download PDFInfo
- Publication number
- CN114264198A CN114264198A CN202111111877.4A CN202111111877A CN114264198A CN 114264198 A CN114264198 A CN 114264198A CN 202111111877 A CN202111111877 A CN 202111111877A CN 114264198 A CN114264198 A CN 114264198A
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- Prior art keywords
- shoulder
- cartridge
- neck
- ammunition
- thickness
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- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 238000003780 insertion Methods 0.000 claims abstract description 20
- 230000037431 insertion Effects 0.000 claims abstract description 20
- 239000003814 drug Substances 0.000 claims abstract description 3
- 230000007704 transition Effects 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 10
- 239000003380 propellant Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000012966 insertion method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Images
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to an ammunition product, belonging to the IPC classification number F42B12/04, in particular to a shell for subsonic ammunition. The cartridge has a cartridge body; the main body of the medicine cylinder gradually forms an inclined shoulder towards the front end and the inclined shoulder narrows into a neck part; the outermost end of the neck is provided with a port; the cartridge body is gradually formed into an insertion portion toward the front end; the insertion part is connected with the metal base through double buckles to form a physical interlocking structure; the thickness of the oblique shoulder and the neck is 0.05-0.4 mm. The cartridge case is made of polymer materials, subsonic flight of ammunition products can be well achieved through the inclined shoulder and the special structural design, and the ammunition products made of the cartridge case have good flight stability.
Description
Technical Field
The invention relates to an ammunition product, belonging to the IPC classification number F42B12/04, in particular to a shell for subsonic ammunition.
Technical Field
In the ammunition article field, mainly brass or steel is used for making the cartridge case, but brass is heavy and has some potential risks, and it may also be possible for some blank ammunition or subsonic ammunition to use some wadding to fill the propellant-filled space when brass is used, but this is liable to cause clogging problems.
Patent CN207439278U provides a rifle bullet, its usable floor area law design philosophy for this rifle bullet is lower at the muzzle initial velocity, and the muzzle sound that causes explodes for a short time, and then has reduced the muzzle noise, but rifle bullet formula as an organic whole is connected, inconvenient dismantlement, and it all is the copper structure, has very big defect when using.
Disclosure of Invention
In order to solve the above-mentioned end problem, the present invention provides a cartridge case for subsonic ammunition, comprising a cartridge case and a metal base; the cartridge has a cartridge body; the main body of the medicine cylinder gradually forms an inclined shoulder towards the front end and the inclined shoulder narrows into a neck part; the outermost end of the neck is provided with a port; the cartridge body is gradually formed with an insertion part at the rear end; the inserting part is connected with the metal base through the double buckles to form a physical interlocking structure.
The inside of the main body of the cartridge contains a propellant in powder form; the bullet may be inserted into the mouth of the subsonic ammunition cartridge shell after the propellant is filled, wherein the method of insertion of the bullet is a method commonly used in the art. As insertion methods, there are cited direct welding of the bullet into the mouth of the case using welding (spin welding, vibration welding, ultrasonic welding, laser welding, etc.); or using an adhesive to bond the bullet to the mouth of the shell; or by welding and passing the adhesive so that the cartridge is inserted into the mouth of the cartridge case.
In the present invention, the cartridge body and the angular shoulder transition form a shoulder transition a; the shoulder transition area B is formed by the oblique shoulder and the neck transition area; the bottom of the bullet is located in the cartridge body or in the shoulder transition area a to the shoulder transition area B.
Preferably, the bullet bottom is located in the shoulder transition region a to the shoulder transition region B, and the bullet bottom can be located at any position in the shoulder transition region a to the shoulder transition region B.
The bullet and cartridge are connected by a mouth of the shell for subsonic ammunition, and when connected by welding, the welded joint may be a butt joint, an angled lap joint, a T joint, a cross joint, a half lap joint, a butt joint, a single U joint, a double U joint end joint, a single bevel joint, a double bevel joint, a sleeve joint, a crimp joint, an edge joint, or any other joint.
In the present invention, the cartridge is made of a polymer, and the weight of the cartridge made of a polymer used in the present invention is much reduced compared to the conventional brass cartridge.
The polymer had characteristics using an unannealed sample having a thickness of 3.18mm under astm d638 conditions including: the yield strength or tensile strength is more than 50Mpa at-55 ℃, and the elongation at break is more than 15%; the yield strength or tensile strength is more than 45Mpa at 23 ℃, and the elongation at break is more than 30%; the yield strength or tensile strength is more than 30Mpa at 160 ℃, and the elongation at break is more than 60%.
The thickness of the oblique shoulder and the neck is 0.05-0.4 mm; preferably, the thicknesses of the inclined shoulders and the neck part are 0.1-0.3 mm; further preferably, the thickness of the oblique shoulder and the neck is 0.23 mm.
The average thickness of the cartridge main body and the insertion part is 0.05-0.4 mm; preferably, the average thickness of the cartridge main body and the insertion part is 0.1-0.3 mm; still further preferably, the average thickness of the cartridge body and the insertion portion is 0.3 mm.
The thickness of the cartridge main body is not uniform in actual manufacturing, in order to better ensure that an air inlet channel can be formed when the propellant propels the projectile into the cartridge shell at subsonic speed, the difference between the thickness of the maximum part and the thickness of the minimum part of the cartridge main body and the insertion part is 0.01-0.1 mm; more preferably, the difference between the thickness of the maximum part and the thickness of the minimum part of the cartridge body and the insertion part is 0.05 to 0.08 mm.
An outer shoulder transition angle is formed at the transition position from the outer part of the oblique shoulder to the outer part of the neck part; an inner shoulder transition angle is formed at the transition position of the inner part of the oblique shoulder to the inner part of the neck part. The transition angles of the outer part of the oblique shoulder, the outer part of the neck and the outer shoulder can be fixed values according to bullets with different calibers; the transition angles of the inner part and the inner shoulder of the oblique shoulder can be adjusted according to requirements; the interior and exterior of the neck are also adjusted according to the selection of the bullet.
Wherein the bullet model includes but is not limited to one of 5.8 x 21mm, 7.62 x 17mm, 7.62 x 25mm, 9 x 18mm, 9 x 19mm, 9 x 20mm, 5.8 x 42mm, 7.62 x 39mm, 7.62 x 54R, 12.7 x 107mm, 14.5 x 118 mm.
In some embodiments, the inner portion of the angular shoulder is parallel to the outer portion of the angular shoulder, i.e., the outer shoulder transition angle is the same size as the inner shoulder transition angle.
In some embodiments, the interior of the angular shoulder is arcuate, in which case the internal shoulder transition angle is the angle between the tangent to the arc and the interior of the neck; preferably, the inner shoulder transition angle is less than or equal to the outer shoulder transition angle; further preferably, the difference between the inner shoulder transition angle and the outer shoulder transition angle is 0 to 45 ° (for example, the difference between the inner shoulder transition angle and the outer shoulder transition angle is 0 °, 2 °, 5 °, 9 °, 15 °, 20 °, 22 °, 30 °, 45 °, etc.); further preferably, the difference between the transition angle of the inner shoulder and the transition angle of the outer shoulder is 2 to 15 °; in a most preferred embodiment, the difference between the transition angle of the inner shoulder and the transition angle of the outer shoulder is 4 to 10 °.
In the invention, the inventor finds that subsonic flight of an ammunition product can be better realized when the difference between the transition angle of the inner shoulder and the transition angle of the outer shoulder is 4-10 degrees, and the ammunition product prepared by using the cartridge case has better flight stability.
The metal base is made of metal, metal alloy or metal and nonmetal alloy.
When the metal base is connected with the cartridge in a buckling mode, the external dimensions of all parts of the cartridge are within the acceptable tolerance range for loading bullets with any calibers.
The metal base is made of steel. Examples of the grades of steel include 40Cr, 40Mn2, 40MnB, 35CrMo, 42CrMo, 30CrMnSi, 35CrNi, 40CrMnAl, 40CrNiMn and 25Cr2Ni4 WA.
Preferably, the grade of the steel is 42CrMo, the steel belongs to quenched and tempered steel, oil cooling is adopted when the quenching temperature is 840-880 ℃, water cooling is adopted when the quenching temperature is 820-840 ℃, and tempering is carried out at about 540 ℃.
The primer of the metal base is a bock primer or a Bodan primer; preferably, the primer pattern of the metal base is Bodan primer.
The cartridge case has the beneficial effects that the cartridge case is prepared from a polymer material, subsonic flight of an ammunition product can be well realized through the inclined shoulder and the special structural design, and the ammunition product prepared from the cartridge case has better flight stability.
Drawings
FIG. 1 is a schematic 3D structure of a cartridge case for subsonic ammunition of the present invention;
fig. 2 is a schematic 3D structure of a subsonic ammunition cartridge case-attached bullet of the present invention.
FIG. 3 is a schematic view of the cartridge;
FIG. 4 is a partial schematic view of a cartridge body, shoulder and neck cross-section;
1. a metal base; 2. a cartridge; 21. a cartridge body; 22. a sloping shoulder; 23. a neck portion; 24. a mouth; 25. an insertion portion; 26. an inner shoulder transition angle; 27. outer shoulder transition angle, 3, bullet; 31. the bottom of the bullet; 28. a shoulder transition zone A; 29. shoulder transition zone B.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present invention, and the described embodiments are only some embodiments of the present invention, and the present invention is not limited to the following embodiments.
Example 1: as shown in fig. 1-4, comprises a cartridge 2 and a metal base 1; the cartridge 2 has a cartridge body 21; the cartridge body 21 is gradually formed into a slant shoulder 22 toward the front end; the sloping shoulder 22 narrows to a neck 23; the outermost end of the neck 23 has a mouth 24; the cartridge body 21 is gradually formed with an insertion portion 25 at a rear end; the insertion part 25 is connected with the metal base 1 in a double-buckle mode to form a physical interlocking structure;
the cartridge body 21 contains a powdered propellant therein; the cartridge 3 can be inserted into the mouth 24 of the subsonic ammunition cartridge case after the propellant has been filled,
the insertion method of the bullet 3 is spin welding; the welding joint is a butt joint;
the transition area of the cartridge main body 21 and the inclined shoulder 22 forms a shoulder transition area A28; the transition area of the inclined shoulder 22 and the neck 23 forms a shoulder transition area B29;
the bullet bottom 31 is located in the shoulder transition region a28 to shoulder transition region B29,
the cartridge 2 is made of a polymer; the polymer had characteristics using an unannealed sample having a thickness of 3.18mm under astm d638 conditions including: the yield strength or tensile strength is more than 50Mpa at-55 ℃, and the elongation at break is more than 15%; the yield strength or tensile strength is more than 45Mpa at 23 ℃, and the elongation at break is more than 40%; the yield strength or tensile strength is more than 30Mpa at 160 ℃, and the elongation at break is more than 60%;
the thicknesses of the inclined shoulder 22 and the neck 23 are 0.23 mm;
the average thickness of the cartridge body 21 and the insertion portion 25 is 0.3 mm;
the difference between the thickness of the maximum part and the thickness of the minimum part of the cartridge main body 21 and the insertion part 25 is 0.06 mm.
The transition from the outer part of the oblique shoulder 22 to the outer part of the neck 23 forms an outer shoulder transition angle 27; an inner shoulder transition angle 26 is formed at the transition of the inner part of the oblique shoulder 22 to the inner part of the neck part 23; the outer portion of the angular shoulder 22, the outer portion of the neck 23, the outer shoulder transition angle 27 may be fixed values according to different calibers of the bullet 3 of the mouth 24;
the model of the bullet 3 is 14.5 x 118 mm;
the interior of the sloping shoulder 22 is curved; the inner shoulder transition angle 26 is the included angle between the arc tangent and the inside of the neck 23; the difference between the inner shoulder transition angle 26 and the outer shoulder transition angle 27 is 6 °;
the metal base 1 is made of steel; the grade of the steel is 42CrMo, the steel belongs to quenched and tempered steel, oil cooling is adopted when the quenching temperature is 840-880 ℃, water cooling is adopted when the quenching temperature is 820-840 ℃, and tempering is carried out at about 540 ℃; the primer type of the metal base 1 is Bodan primer.
Claims (10)
1. A shell case for subsonic ammunition is characterized by comprising a cartridge case and a metal base; the cartridge has a cartridge body; the main body of the medicine cylinder gradually forms an inclined shoulder towards the front end and the inclined shoulder narrows into a neck part; the outermost end of the neck is provided with a port; the cartridge body is gradually formed into an insertion portion toward the front end; the insertion part is connected with the metal base through double buckles to form a physical interlocking structure; the thickness of the oblique shoulder and the neck is 0.05-0.4 mm.
2. The shell for subsonic ammunition as claimed in claim 1, wherein said shoulder and neck have a thickness of 0.1 to 0.3 mm.
3. The cartridge case for subsonic ammunition according to claim 1 or 2, characterized in that said cartridge body and said insertion portion have an average thickness of 0.05 to 0.4 mm.
4. The cartridge case for subsonic ammunition as claimed in claim 3, characterized in that said cartridge body and said insertion portion have an average thickness of 0.1 to 0.3 mm.
5. The cartridge case for subsonic ammunition as claimed in claim 4, characterized in that said difference between the thickness of said cartridge body and the maximum portion and the thickness of the minimum portion of the insertion portion is comprised between 0.01 and 0.1 mm.
6. The cartridge case for subsonic ammunition as claimed in claim 5, characterized in that said difference between the thickness of said cartridge body and the maximum portion and the thickness of the minimum portion of the insertion portion is comprised between 0.05 and 0.08 mm.
7. A casing for subsonic ammunition as claimed in claim 1 or 5, characterized in that the transition from the outside of said sloping shoulder to the outside of the neck forms an outer shoulder transition angle; an inner shoulder transition angle is formed at the transition position from the inner part of the oblique shoulder to the inner part of the neck part; the inner shoulder transition angle is less than or equal to the outer shoulder transition angle.
8. The shell for subsonic ammunition as claimed in claim 7, wherein said difference between said internal shoulder transition angle and said external shoulder transition angle is between 0 ° and 45 °.
9. The case for subsonic ammunition as claimed in claim 1, wherein said metal base is made of metal, metal alloy or metal and non-metal alloy.
10. The case for subsonic ammunition as claimed in claim 9, wherein said metal base is made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111877.4A CN114264198A (en) | 2021-09-23 | 2021-09-23 | Shell case for subsonic ammunition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111877.4A CN114264198A (en) | 2021-09-23 | 2021-09-23 | Shell case for subsonic ammunition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114264198A true CN114264198A (en) | 2022-04-01 |
Family
ID=80824632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111111877.4A Pending CN114264198A (en) | 2021-09-23 | 2021-09-23 | Shell case for subsonic ammunition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114264198A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040244630A1 (en) * | 2003-03-27 | 2004-12-09 | Derek Booth | 4.6mm small arms ammunition |
| US20140060372A1 (en) * | 2011-01-14 | 2014-03-06 | Pcp Tactical, Llc | Variable inside shoulder polymer cartridge |
| WO2014062256A2 (en) * | 2012-07-13 | 2014-04-24 | Pcp Tactical, Llc | Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition |
| CN112513557A (en) * | 2018-07-30 | 2021-03-16 | 沙特基础工业全球技术有限公司 | Lightweight ammunition article comprising a polymeric cartridge shell |
| US11060828B1 (en) * | 2019-06-28 | 2021-07-13 | Richard J. Gemmrig | Double shoulder angle firearm cartridge and chamber for AR-15, bolt rifles, pistols, and other firearms |
-
2021
- 2021-09-23 CN CN202111111877.4A patent/CN114264198A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040244630A1 (en) * | 2003-03-27 | 2004-12-09 | Derek Booth | 4.6mm small arms ammunition |
| US20140060372A1 (en) * | 2011-01-14 | 2014-03-06 | Pcp Tactical, Llc | Variable inside shoulder polymer cartridge |
| WO2014062256A2 (en) * | 2012-07-13 | 2014-04-24 | Pcp Tactical, Llc | Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition |
| CN112513557A (en) * | 2018-07-30 | 2021-03-16 | 沙特基础工业全球技术有限公司 | Lightweight ammunition article comprising a polymeric cartridge shell |
| US11060828B1 (en) * | 2019-06-28 | 2021-07-13 | Richard J. Gemmrig | Double shoulder angle firearm cartridge and chamber for AR-15, bolt rifles, pistols, and other firearms |
Non-Patent Citations (1)
| Title |
|---|
| 曾必强等: "子弹头部对亚音速气动特征影响数值模拟", 《弹箭与制导学报》 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220802 Address after: 510000 shop 102, No. 26, Caohe Dening Road, Qiaonan street, Panyu District, Guangzhou City, Guangdong Province Part 02 Applicant after: Guangzhou Deli Plastic Chemical Technology Co.,Ltd. Applicant after: Shenzhen Deli Plastic Chemical Technology Co.,Ltd. Address before: 518000 1609, Xihai Mingzhu building, No. 1 Taoyuan East Road, dawangshan community, Nantou street, Nanshan District, Shenzhen, Guangdong Province Applicant before: Shenzhen Deli Plastic Chemical Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220401 |
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| RJ01 | Rejection of invention patent application after publication |