EP2742313B1 - Hollow-channel projectile nose and shaping of a projectile body in the nose region - Google Patents

Description

The invention relates to a projectile in which it comes to an accelerated expansion of the projectile upon impact with a soft medium, with a view in the weft direction arranged at the top cylindrical bore which extends coaxially to the longitudinal axis projectile and in this bore a projectile nose is inserted the longitudinal axis of the projectile at the same time also forms the longitudinal axis of the projectile nose and in the projectile nose coaxially to the longitudinal axis an open hollow channel is introduced.

Such a projectile is described in DE 100 10 500 A1 ,

DE 20 2005 013495 U1 describes a projectile, in particular for hunting rifles, with drawn barrel with a guide body and a bullet mounted on this bullet as Geschosseinheit, wherein the desired caliber or subcaliber trained guide body of the projectile is a substantially cylindrical ballistically trained rear body, wherein that of the projectile nose facing blunt end of the guide body has a receiving hole formed as a cylindrical blind hole, in which the trained as a ballistically shaped Auftreffspitze projectile nose with an integrally formed cylindrical expiring approach is insertable and can be fixed with good fit.

EP 2 226 606 A2 describes a partial decomposition projectile with a bow core and a tail core, wherein the bow core forms a part of the projectile which separates and the tail core forms a penetrator of the projectile. The bow core and the rear core are made of equally hard materials with hardness values in the Brinell hardness range (HBW).

The invention has for its object to improve a projectile according to the preamble of claim 1 such that upon impact of the projectile on a soft medium it comes to an accelerated expansion of the projectile and at the same time penetration of foreign bodies and moisture is prevented in the projectile body.

This object is achieved by a projectile according to the features of claim 1.

Due to the fact that the hollow channel extends in the weft direction from the front end to the rear end of the projectile nose and a membrane is arranged in the hollow channel which divides the hollow channel into two hollow channel sections, an accelerated expansion of the projectile occurs when the projectile strikes a soft medium Projectile and at the same time penetration of foreign bodies and moisture is prevented in the projectile body.

The hollow channel ensures that the impact of the projectile on a soft medium, this penetrates into the bullet point. The membrane is broken up and the soft medium migrates to the bottom of the projectile tip. This leads to an accelerated expansion of the projectile. The hollow channel diameter depends on the caliber size. It is preferably between 0.2 mm and 6 mm. The membrane prevents the penetration of moisture and foreign matter in the lying below the membrane hollow channel portion of the projectile nose when storing the cartridge.

Preferably, the two hollow channel sections are substantially the same length.

In a preferred embodiment, the front portion of the projectile nose is conically formed with an angle β, wherein the diameter at the front end of the projectile nose is the lowest and the rear end of the projectile nose is designed as a holding cylinder and the holding cylinder has a diameter adapted to the cylindrical bore in the projectile on.

In one embodiment, at its end facing the holding cylinder, the conical front region merges into the holding cylinder via a ramp with an expansion angle α, the expansion angle α being measured clockwise from the longitudinal axis. Preferably, the expansion angle α is between 10 ° and 80 °. Upon impact of the projectile tip on a medium, the projectile tip pushes with its slope in the cylindrical bore at the top of the projectile, thus exposing the projectile body and possibly the projectile shell, thereby forming an annular surface. This initiates an early disassembly of the projectile. In the non-dismantling projectile, the exposed ring surface does not act as an expansion aid but rather as a sharp edge, which punches out a hole when it penetrates the medium.

In order to improve this displacement or slipping off, the slope on the projectile tip preferably lies flat on corresponding surfaces of the projectile body and on the shell projectiles of the projectile jacket.

The front end of the projectile nose is preferably provided with a flat surface.

The projectile nose can be made of the following materials: plastics, polymer plastics with or without additives, the additives being glass fiber, metal powder or powder of metal compounds such as e.g. BaSO4 or color pigments can be.

The bullet tip can also be made of the following materials: completely made of metal, or metal alloys, such as. B. made of aluminum, produced by die-casting.

Preferably, a free space is arranged between the rear end of the projectile nose and the bottom of the cylindrical bore. This space serves to accommodate the penetrating soft medium and improves the expansion of the projectile upon impact.

The projectile is preferably a mantle projectile or a non-dismantling projectile.

The invention will be further explained with reference to three figures.

FIG. 3 shows a projectile nose 1 according to the invention preferably for a mantle projectile according to FIG. 1 or a non-dismantling projectile 16 according to FIG. 2 ,

• Kunststoffe, Polymerkunststoffe mit oder ohne Zusätze. Zusätze können sein Glasfaser, Metallpulver oder Pulver von Metallverbindungen wie z.B. BaSO4, Farbpigmente. Weiterhin kann die Geschossspitze komplett aus Metall, oder Metalllegierungen, gefertigt sein, wie z.B. aus Aluminium, hergestellt im Druckgussverfahren.

The materials of which the bullet tip 1 consists are preferred:

• Plastics, polymer plastics with or without additives. Additives can be glass fiber, metal powder or powder of metal compounds such as BaSO4, color pigments. Furthermore, the bullet tip can be made entirely of metal, or metal alloys, such as aluminum, manufactured by die-casting.

The projectile nose 1 preferably has a cone-shaped front region 2, which extends from the front planar surface 7 to the maximum diameter 8 of the projectile nose 1. The cone-shaped front region 2 then passes over a slope 3 in the holding cylinder 4. In the projectile tip 1, a hollow channel 5 is introduced, which is arranged coaxially to the longitudinal axis 12. In the middle, i. in the region of the maximum diameter 8, a membrane 6 is arranged, which divides the hollow channel 5 into two substantially equal length hollow channel sections 5a, 5b.

The expansion angle α of the bevels 3 (α is measured in a clockwise direction from the longitudinal axis 12), in contrast to conventional projectile tips made of plastic, not 90 °, but is preferably between 10 ° and 80 °. The slope 3 of the projectile nose 1 rests flat on corresponding surfaces 9, 10 of the projectile body 11 and the projectile shell 13 (see FIG. 1 ). FIG. 2 shows a non-collapsible projectile 16. Here, the slope 3 is flat on a slope of the 3 corresponding surface 9 of the non-separable projectile 16 fully (see FIG. 2 ).

The projectile tip 1 is preferably used with its holding cylinder 4 in a bore 15 in the projectile body 11 and projectile 16 and lies with the described surfaces 9 and 10. Between the inserted projectile nose 1 and the bottom 17 of the bore 15, a free space 18 may be arranged.

Upon impact of the projectile nose 1 on a soft medium, this pushes along the surfaces 9 or 10 in the bore 15 at the top of the projectile body 11 and so sets these surfaces 9 or 10 free. This initiates an early disassembly of the projectile.

The central feature of the present hollow-channel projectile tip 1 is the hollow channel 5 interrupted by a membrane 6.

The membrane 6 prevents the penetration of foreign bodies and moisture in the projectile body or the projectile. In addition, the hollow channel 5 guarantees upon impact of the projectile on a soft medium that this penetrates into the projectile body tip 1 and the hollow channel 5. In this case, the membrane 6 is broken and the medium migrates to the bottom of the projectile nose 1 through. This leads to an accelerated expansion of the projectile. The hollow channel diameter 19 depends on the caliber size. It is preferably between 0.2 mm and 6 mm. The hollow channel diameter 19 is preferably slightly smaller than the diameter 21 of the holding cylinder 4.

The membrane 6 prevents in storage of the cartridge, the penetration of moisture and foreign bodies in the lying below the membrane 6 hollow channel section 5b of the projectile nose 1. The thickness of the membrane 6 can vary from 0.1 mm - bore diameter. The hollow channel 5 or the hollow channel sections 5a, 5b is / are open at the upper or front end 22 on the flat surface 7 and at the rear end 23.

The flat surface 7 avoids damage to the projectile nose. 1

The projectile tip diameter 8 is the largest, ie maximum diameter of the projectile nose 1. It is determined by the desired response of the projectile. The diameter is between 2 mm and caliber diameter.

The bullet tip 1 can be used from cal. .22 to cal. 12.7 mm. The bullet type can be a decomposition, Teilzerlegungs-, deformation or non-dismantling bullet 16 (see FIG. 2 ) be. The present projectile nose 1 can also be used in a projectile made of solid material projectile.

The material of the projectile core 11 of the shell projectile according to FIG. 1 may consist of a Pb-containing or Pb-free material. A mix of Pb-containing and Pb-free materials is also possible.

The projectile casing 13 of the shell projectile according to FIG. 1 can consist of the materials Cu, CuZn, steel, as well as other metals. In addition, cladded or otherwise coated bullet casings (eg coating with bonded varnish) can also be used. The shell wall thickness can vary depending on the caliber and speed between 0.2 mm and 3 mm. The shell wall thickness can also have a course.

Functionality:

When hitting the projectile nose 1 on a medium, the projectile nose 1 in the deeper hole 15 (maximum to the floor 17) in the holding cylinder 4 dive. In this case, an annular surface 9, 10 free, which initiates an immediate expansion of the projectile by the flow of the medium. Through the hollow channel section 5b in the projectile tip 1 then further penetrates the medium, pierces the membrane 6, and thus accelerates the expansion of the projectile.

The described modes of operation are the same for all types of projectiles. According to the non-dismantling projectile FIG. 2 the projectile tip diameter 8 must be selected larger to maximum caliber diameter. The exposed ring surface does not act as Expansion aid but as a sharpening edge, which punched out a hole in the penetration of the medium out of this.

Claims (11)

1. A projectile, with which upon impact upon a soft medium an accelerated expansion of the projectile results, having a cylindrical bore (15) which, viewed in the direction of fire, is arranged at the tip and which runs coaxially to the longitudinal axis (12) of the projectile, and inserted into this bore there is a projectile tip (1), wherein the longitudinal axis (12) of the projectile at the same time also constitutes the longitudinal axis of the projectile tip (1), and introduced in the projectile tip (1) coaxially to the longitudinal axis (12) there is an open hollow channel (5), characterised in that the hollow channel (5), viewed in the direction of fire, extends from the front end (22) as far as the rear end (23) of the projectile tip (1), and arranged in the hollow channel (5) there is a membrane (6) which divides the hollow channel (5) into two hollow-channel sections (5a, 5b).
2. A projectile according to claim 1, characterised in that the front region (2) of the projectile tip (1) is formed in a conical manner with an angle β, wherein the diameter at the front end (22) is the smallest, and the rear end (23) of the projectile tip (1) is formed as a holding cylinder (4) and has a diameter that is adapted to the cylindrical bore (15) in the projectile.
3. A projectile according to claim 2, characterised in that the conical front region (2) at its end facing the holding cylinder (4) merges by way of a bevel (3) with an expansion angle α into the holding cylinder (4), wherein the expansion angle α is measured in the clockwise direction from the longitudinal axis (12).
4. A projectile according to claim 3, characterised in that the expansion angle α lies between 10° and 80°.
5. A projectile according to claim 3 or 4, characterised in that the bevel (3) rests in a planar manner on corresponding surfaces (9, 10) of the projectile body (11) and, in the case of jacketed projectiles, of the projectile jacket (13).
6. A projectile according to one of claims 1 to 5, characterised in that the front end (22) of the projectile tip (1) is provided with a planar surface (7).
7. A projectile according to one of claims 1 to 6, characterised in that the projectile tip (1) is produced from the following materials: plastics, polymer plastics with or without additives.
8. A projectile according to claim 7, characterised in that the additives are glass fibres, metal powders or powders from metal compounds such as, for example, BaSO4 or coloured pigments.
9. A projectile according to one of claims 1 to 6, characterised in that the projectile tip (1) is produced from the following materials: completely from metal or metal alloys, such as, for example, from aluminium, produced in the die-casting process.
10. A projectile according to one of claims 1 to 9, characterised in that arranged between the rear end (23) of the projectile tip (1) and the base (17) of the cylindrical bore (15) there is a clearance (18).
11. A projectile according to one of claims 1 to 10, characterised in that the projectile is a jacketed projectile or a non-disintegrating projectile.

Images