EP2859299B1 - Practice projectile and practice cartridge - Google Patents

Description

TECHNICAL AREA

The present invention relates to an exercise cartridge with a Übungsprojektil for use at short distances, especially below 100 meters, more preferably below 50 meters, according to the preamble of claim 1, such as in the EP0626557 A described.

STATE OF THE ART

Cartridge ammunition is known from the prior art. For example, the Swiss Army uses the rifle cartridge 90 (GP 90). NATO also uses very similar ammunition.

Such cartridges typically include a bullet, a cartridge case for storing the projectile and propellant, and a primer disposed in the cartridge bottom, through which the propellant can then be appropriately ignited so that the pellet can be fired accordingly.

Both projectile and cartridge case are made of metallic materials in the above ammunition. For example, the projectile may be made of lead alloy with a Tombak shell and the cartridge case is made of brass.

In practice, such projectiles have a number of disadvantages. On the one hand, the costs of such projectiles are due to the materials used comparatively high. On the other hand, the materials are sometimes problematic for the environment. Especially with heavy metals, some circles believe that they pollute the earth in practice areas, which is why expensive redevelopment measures have to be carried out during conversions of such terrain structures.

Furthermore, practice ammunition is known which leads to an adaptation of the weapon system. For the training persons, this is disadvantageous because the exercise conditions then no longer correspond to the conditions of use. In addition, two different systems must be maintained. On the one hand the weapon system for the use and on the other hand the weapon system for the exercise.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide an exercise cartridge for short distances, which shows very realistic use conditions and at the same time is cheaper to produce. Furthermore, the projectile should also be more environmentally friendly than the known projectiles.

Accordingly, an exercise projectile for use at a short distance, in particular below 100 meters, particularly preferably below 50 meters, comprises a front area extending along a central axis with a projectile tip and a front area in the direction of the central axis adjoining the rear area with a projectile end, the rear area being designed to receive the projectile in a cartridge case. Furthermore, the projectile comprises a projectile core made of metal or a projectile core of a mixture of plastic and metal or a projectile core of metallic solid or loose powder and a surrounding the projectile core and at least partially the outer shape of the projectile defining sheath made of plastic. The Übungsprojektil stands with a cartridge case in connection, wherein the cartridge case has a sleeve portion and a standing in contact with the sleeve part cartridge bottom, wherein at least the sleeve part is made of plastic. The projectile is held via a positive connection and / or a frictional connection in a receiving portion in the sleeve part. Consequently, the projectile is thus substantially mechanically connected to the cartridge case. In other words can also be said that the projectile is placed in the Aufhahmeabschnitt.

The projectile can thus have different embodiments.

According to a first embodiment, the projectile comprises a projectile core made of metal with a surrounding the projectile core and at least partially the outer shape of the projectile defining sheath made of plastic. The projectile core is stable in itself. It is therefore preferably a solid projectile core.

According to a second embodiment, the projectile comprises a projectile core of a mixture of plastic and metal with a surrounding the projectile core and at least partially the outer shape of the projectile defining sheath made of plastic. Here it is conceivable, for example, that in the plastic mixture metal parts are present, wherein the plastic mixture serves as a matrix for cohesion of the metal parts.

According to a third embodiment, the projectile comprises a projectile core of metallic solid or loose powder with a surrounding the projectile core and at least partially the outer shape of the projectile defining sheath made of plastic. The powder can be loose in the casing, whereby an interior is created by the sheath, in which the powder is located. However, the powder can also be present, for example, as a sintered process as a solid composite, this solid composite then being surrounded by the casing.

Due to the formation of the projectile with a metal or metal-containing core and a plastic jacket, a bullet can be provided which has very similar ballistic properties to conventional bullets. The metallic core ensures a corresponding weight, while the sheath made of plastic with the outer shape determines the aerodynamics of the projectile.

Preferably, the projectile core has the shape of a cylinder. In this case, the projectile core can be produced particularly easily.

Preferably, the sheath completely surrounds the projectile core. This means that the projectile core is not visible from the outside. The sheath determines the outer shape of the projectile. As a result, the metallic components are completely protected by the sheath and the corrosion of the same can be prevented during storage.

Alternatively, the casing partially surrounds the projectile core, with the projectile core preferably projecting out of the casing or forming the projectile tip in the region of the projectile tip. The projectile core may also be flush with a corresponding surface of the shroud. In this alternative embodiment, the projectile core is partially visible from the outside and it can also be said that the projectile core is held by the shell. The outer shape is determined here only partially by the sheath. In the areas where the projectile core is visible, the projectile core determines the outer shape and in the areas where the shell is present, the shell determines the outer shape.

In other words, it can be said that the projectile core is at least partially surrounded by the casing.

With regard to the complete sheathing, it should also be noted that the projectile can also be used in a more environmentally friendly manner because, due to the arrangement of the plastic sheathing, no contact between the metal and the surroundings can take place.

Preferably, the sheath extends from the projectile tip as seen in Front area with a conical section, preferably with two conical sections with different angles, and then merges into a cylindrical section. The rear region is preferably substantially cylindrical.

Preferably, the rear region has a holding portion with which the projectile can be stored in a cartridge case. The holding portion may be formed variously. In a first embodiment, the holding section is a recess which extends in the rear region and runs around the central axis and which is bounded on both sides by the rear region. In a second embodiment, the holding portion is formed by two projections surrounding the projectile and extending outwards from the diameter of the rear region. In a third embodiment, the holding portion is bounded by a single projectile surrounding and extending from the diameter of the rear portion to the outside elevation. This survey then comes to lie in the interior of the cartridge case. Regardless of the arrangement of the recess or survey, the holding portion in the region with which a contact with the cartridge case is preferably a slightly larger diameter than the inner diameter of the cartridge case in the same area.

Preferably, the projectile core is arranged in the weft direction in the front region of the projectile. Alternatively, the projectile core is also arranged centrally between projectile tip and projectile end.

Preferably, the projectile core in the weft direction has a length which is smaller by a factor in the range of 2 to 5, in particular in the range of 2.5 to 4.5, seen as the total length of the projectile from projectile tip to projectile end in the direction of the central axis ,

Preferably, the projectile core has a diameter which is smaller by a factor in the range of 1.1 to 1.8, in particular by a factor in the range of 1.2 to 1.6 than the nominal diameter of the projectile.

The projectile core is selected from a metal or a metal alloy of the Group of steel and / or non-ferrous metals. Particularly preferably, the projectile core is free of heavy metals. The sheath is made of a plastic selected from a thermoplastic or an elastomer or a plastic mixture selected from a thermoplastic and / or an elastomer.

Preferably, the projectile has a larger diameter in sections than the defined nominal diameter of the projectile. In this case, when passing through the barrel of a firearm, the projectile, in particular the casing made of plastic, is slightly compressed and offset by the running trains in rotation about the central axis.

The formation of the sleeve part and / or the cartridge base made of plastic has the advantage that a cost-effective cartridge case can be provided. In addition, the sleeve is more environmentally friendly than other known from the prior art metallic sleeves. The connection via positive locking and / or adhesion between projectile and cartridge case has the advantage that the resistance of the connection is easier dimensioned. It can thus not come to uncontrolled reactions or tearing during the ignition process.

The cartridge bottom is preferably held in the sleeve part via a positive connection, material connection and / or adhesion.

Preferably, the receiving portion in which the projectile is held, an inner diameter which is smaller than the outer diameter of the projectile in the region of the rear portion, which comes to lie in the receiving portion. Consequently, a frictional connection can be easily provided.

Preferably, at least one of said elevations is positioned behind the receiving portion of the cartridge case as viewed in the firing direction, said elevation having a diameter which is greater than the inner diameter of the receiving portion. In this way, a positive connection with respect to a movement of the projectile out of the sleeve can be provided. When firing, this connection is canceled.

A combination between positive and non-positive connection is particularly advantageous.

Preferably, the sleeve part and / or the cartridge bottom of a thermoplastic and / or an elastomer or a corresponding plastic mixture. The cartridge bottom may also be made of a metal, such as steel or a non-ferrous metal. Preferably, both sleeve part and cartridge bottom are free of heavy metals.

• in einem ersten Schritt das Projektil mit dem Hülsenteil verbunden
• in einem zweiten Schritt das Treibmittel in das Hülsenteil gefüllt und
• in einem dritten Schritt das Hülsenteil mit dem Patronenboden verbunden.

According to a method of manufacturing a practice cartridge as described above

• in a first step, the projectile connected to the sleeve part
• in a second step, the propellant filled in the sleeve part and
• in a third step, the sleeve part connected to the cartridge bottom.

Depending on the embodiment, between the first step and the second step, said projectile core is introduced or filled through the sleeve part into the projectile.

• in einem ersten Schritt der Patronenboden mit dem Hülsenteil verbunden wird,
• in einem zweiten Schritt das Treibmittel in das Hülsenteil gefüllt und
• in einem dritten Schritt das Hülsenteil mit dem Projektil verbunden.

According to an alternative method of making an exercise cartridge as described above

• in a first step, the cartridge bottom is connected to the sleeve part,
• in a second step, the propellant filled in the sleeve part and
• in a third step, the sleeve part connected to the projectile.

In both methods, an injection molding method for producing the projectile and the sleeve part is particularly preferably used. In the first method projectile and sleeve part can be directly connected to each other with the injection molding material cohesively. An insertion of the projectile in the sleeve part is also conceivable. The cartridge bottom can also be made by means of a syringe casting process or otherwise.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine Seitenansicht einer Übungspatrone mit einem Übungsprojektil nach einer Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine Schnittansicht von Figur 1;

Fig. 3

eine Detailansicht des Übungsprojektils nach Figur 1;

Fig. 4

eine Detailansicht der Patronenhülse nach Figur 1 mit einem Detail X; und

Fig. 5

eine Explosionsdarstellung von Fig. 4.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a side view of an exercise cartridge with a Übungsprojektil according to an embodiment of the present invention;

Fig. 2

a sectional view of FIG. 1 ;

Fig. 3

a detailed view of the exercise projectile FIG. 1 ;

Fig. 4

a detailed view of the cartridge case after FIG. 1 with a detail X; and

Fig. 5

an exploded view of Fig. 4 ,

DESCRIPTION OF PREFERRED EMBODIMENTS

In the FIG. 1 a cartridge 14 is shown in a side view. The cartridge 14 comprises a Übungsprojektil 1 and a cartridge case 6. The Übungsprojektil 1 can also be referred to as projectile 1. Exercise projectile 1 is mounted in the cartridge case 6. In accordance with the provisions in the FIG. 1 shown cartridge 14, which may also be referred to as a practice cartridge, used for the exercise or training of armed forces. The exercise cartridge 14 is used in particular at a short distance, that is, in particular below 100 m, particularly preferably below 50 m. As the description below shows, Exercise Project 1 is still a lethal projectile.

In the FIG. 2 the cartridge 14 according to the FIG. 1 shown in a sectional view, in which case the structure of Übungsprojektil 1 and cartridge case 6 can be well recognized.

The Übungsprojektil 1 comprises a along a central axis M extending front portion 2 with a projectile tip 3 and in the direction of the central axis M The rear region 4 is designed for receiving the training projectile 1 in the cartridge case 6.

The Übungsprojektil 1 comprises a projectile core 7 made of metal and surrounding the projectile core 7 and the outer shape of the Übungsprojektil 1 determining sheath 8 made of plastic. In other words, it can also be said that the training projectile 1 consists of metallic areas, here in the form of the projectile core 7, and of areas of plastic, here in the form of the sheath 8.

The projectile core 7 may be made of metal or a mixture of metal and plastic or metallic loose or solid powder. The projectile core 7 can thus be solid and have its own structure or the form of a powder, which is filled into the sheath.

In the embodiment according to the figures, the projectile core 7 is completely surrounded by the casing 8. In other embodiments, not shown here, it is also conceivable that the sheathing surrounds the projectile core only partially, so that the projectile core is visible from the outside and forms part of the outer shape. For example, it would be conceivable that the front end face 19 provides the tip of the projectile.

Based on FIG. 3 Now, the formation of the projectile 1 will be explained in more detail. The projectile core 7 is shown in dashed lines in this figure. The projectile core 7 preferably has the shape of a cylinder. The cylinder extends with a circular cross-section along the central axis M and is bounded by a lateral surface 18 and two end faces 19. The transition between lateral surface 18 and end face 19 can take place via a conical section 20. The conical section 20 can also be referred to as chamfering.

In the FIG. 3 can be further well recognized that the sheath 8 made of plastic completely surrounds the projectile core 7 in this embodiment. The lateral surface 18 and end faces 19 and optionally the chamfering are thus completely covered by the sheath 8.

The sheath 8 has seen from the projectile tip 3 ago in the front region 2 a conical section 9. The conical section 9 has, in the present embodiment, two conical areas 9a and 9b with different angles. The first conical section 9a, which directly adjoins the projectile tip 3, has a shallower angle with respect to the central axis M than the conical section 9b, which adjoins the conical section 9a. After the conical section 9 or the conical sections 9a, 9b, the casing 8 then merges into a cylindrical section 10, which extends along the central axis M.

The front area 2 then adjoins the rear area 4, which is also cylindrical. In the present embodiment, the rear portion 4, as explained below, different diameters.

With regard to the conical design of the Übungsprojektil 1 in the front area 2 should be noted that this is only one possible embodiment. Alternatively, it is also possible to dispense with the conicity, wherein the projectile would then have an end face extending perpendicularly to the central axis M, or the front region may be designed as an ogive, that is to say slightly rounded.

As already mentioned, the rear region 4 is substantially cylindrical and has different sections with different diameters. Such a section is the holding section 12 associated with the rear region 4. The projectile 1 is mounted in the cartridge case 6 with the holding section 12. For this purpose, the cartridge case 6 has a receiving portion 17. The holding portion 12 may be formed variously. In the present embodiment according to the FIG. 3 the holding section 12 has a depression 11 extending in the rear region 4 and encircling the central axis M. This depression is seen on both sides with respect to the central axis M bounded by elevations 13. These elevations 13 essentially define the outside diameter DH of the rear region 4. In other words, it can also be said that the depression 11 is bounded on both sides by the rear region 4. The recess 11 has a diameter DV, which is smaller than the diameter DH of the rear region 4. One of the two elevations 13 comes in The inner space 28 of the cartridge case 6 to lie and the other of the two elevations 13 is outside the cartridge case 6. Both surveys border vorzugswiese directly to the receiving portion 27 at.

In other words, it can also be said that the holding section 12 is bounded by two projections 13 surrounding the projectile 1 and extending outwards from the diameter of the rear region 4. These are essentially the identical structure with the embodiment just described with the recess 11.

In an alternative embodiment, the holding portion 12 may be bounded by a single elevation 13 surrounding the projectile 1 and extending outwardly from the diameter of the rear portion 4. This is the elevation 13 in the region of the end of the projectile 5. This means that the elevation 13 between the rear region 4 and the front region 2 would be dispensed with in this embodiment.

In principle, it should be said that the diameter DV of the region which projects into the receiving section 17 of the cartridge case 6 is smaller than that which extends from the receiving section 17 along the central axis M into the cartridge case 6. The latter part is the section with the diameter DH which is close to the projectile end 5. The diameter DV is thus smaller than the diameter DH. This can be done in the Figures 2 and 3 be recognized accordingly. This enlargement has the advantage that the projectile 1 at the ignition of the present in the cartridge case 6 ignition means a certain resistance is provided.

The projectile core 7 is preferably arranged in the weft direction in the front region of the projectile 1. In other words, the projectile core 7 is thus preferably arranged in the front region 2 and at most partially extends into the rear region 4. This is a particularly good arrangement with respect to the ballistic properties at a short distance.

Alternatively, the projectile core 7 can also extend further into the rear region 4, whereby the ballistic properties can be changed. For example it would be conceivable to arrange the projectile core 7 between the projectile tip 2 and the projectile end 5 in the middle.

The projectile core 7, viewed in the weft direction or in the direction of the central axis M, has a length which is smaller by a factor in the range from 2 to 5, in particular in the range from 2.5 to 4.5, than the total length of the projectile 1 from the projectile tip 2 seen until projectile end 5.

The projectile core 1 further has a diameter D, which is smaller by a factor in the range of 1.1 to 1.8, in particular by a factor in the range 1.2 to 1.6 than the nominal diameter DN of the projectile. The nominal diameter DN of the projectile is to be understood in the present context as the diameter of the front region 2.

With regard to the diameter, it should also be noted that the diameter DH in the rear region 4 is greater than the diameter DN in the front region 2. The diameter DN, ie the nominal diameter, corresponds essentially to the diameter of the barrel with which the projectile 1 is to be used accordingly. The enlargement of the rear diameter DH has the advantage that the plastic sheath in this area is slightly compressed the passage of the barrel and the Übungsprojektil 1 is set by the Laufzüge accordingly in rotation. Preferably, the projectile has a nominal diameter DN in the range of 4 to 10 mm.

In other words, it can also be stated that the profile 1 has, in sections, a larger diameter DH than the defined nominal diameter DN of the projectile 1. The diameter DH is particularly preferred by a factor in the range of 1.05 to 1.1 greater than the nominal diameter DN.

The projectile core 7 is preferably made of a metal or a metal alloy selected from steel and / or non-ferrous metals. The sheath is preferably made of a plastic selected from a thermoplastic or an elastomer or a plastic mixture selected from a thermoplastic and / or an elastomer.

The materials mentioned are particularly environmentally friendly materials. Most preferably, all parts are free of heavy metals.

Of the FIG. 2 It can be well recognized that the cartridge case 6 has a sleeve part 15 and a cartridge base 16 communicating with the sleeve part 15. Preferably, the sleeve member 15 is made of plastic and the cartridge bottom 16 made of metal.

The projectile 1 is connected via a positive connection and / or a frictional connection with a receiving portion 17 of the sleeve part 15 in connection. In other words, it can also be said that the projectile 1 is held in the sleeve part 15 via a positive connection and / or a force fit in a receiving section 17 of the sleeve part 15.

The cartridge bottom 16 is held in the sleeve part 15 via a positive connection, material connection and / or a force fit.

In the present embodiment, in the FIGS. 4 and 5 be recognized that sleeve member 15 and cartridge bottom 16 have a latching structure 21. The latching structure 21 in this case comprises a plurality of circumferentially extending grooves 22 on the sleeve part 15 and elevations 23 on the cartridge bottom 16. Elevations 23 engage in the depressions 22 and thus hold the cartridge bottom 16 on the sleeve part 15.

The structure of the elevations 23 and depressions 22 is chosen so that a force is transmitted against the weft direction on the cartridge bottom on the sleeve part 15 so that after firing the cartridge case 6 can be pulled out of the chamber of the weapon. For this purpose, the cartridge bottom on a circumferential Ausziehrille 24. At least one mating consisting of elevation 23 and recess 22 in this case have a substantially perpendicular to the central axis M extending contact surface 30. About this contact surface 30 then a corresponding force from the cartridge bottom 16 can be transferred to the sleeve member 15 during the process of extraction. In the present embodiment, two contact surfaces 30 are provided. The contact surfaces 30 are spaced apart in the direction of the central axis M and run as annular surfaces around the central axis M around.

The cartridge base 16 is preferably made of a metallic material or plastic and also has a receptacle 25 for a primer on.

The receiving portion 17, in which the projectile 1 is held, preferably has a diameter DI, which is smaller than the outer diameter DN of the projectile in the rear region 4, which protrudes into said receiving portion 17. Thus, the projectile is held or clamped in the receiving portion 17 accordingly. This non-positive clamping connection is additionally or alternatively provided to the above-described form-fitting connection by elevation 13 or recess 11. It can therefore be said that on the one hand the projectile 1 is held via a clamping connection and / or on the other hand via the elevation 13 in the receiving portion 17th is secured. Survey 13 and / or enlarged outside diameter DV in the rear region 4 provide resistance to the ignition of the propellant in the cartridge case 6, so that a corresponding pressure can build up before the projectile 1 disengages from the cartridge case 6.

Preferably, the receiving portion 17 seen in the weft direction has a length which substantially corresponds to the length of the holding portion 12.

The cartridge case 8, in particular the sleeve part 15 is made of a plastic, in particular a thermoplastic or an elastomer, or a plastic mixture of a thermoplastic and / or an elastomer.

Based on FIGS. 4 and 5 Now, the shape of the sleeve member 15 will be described. From the receiving portion 17, the sleeve part 15 extends over a conical portion 26 to a cylindrical portion 27. The cylindrical portion 27 then closes the latching structure 21 at. The cylindrical gate 27 preferably extends with a constant outside diameter and a constant inside diameter, so that the sleeve part 15 has a constant wall thickness in this area. In the rear area against the latching structure 21, the wall thickness is chosen slightly larger, so that here the interior 28 tapers conically along the central axis M in the direction of the cartridge bottom 16. This training has the advantage that a greater resistance in the Operation of the ignition can be provided. The corresponding amplification area bears the reference numeral 29.

In an advantageous manufacturing method, the projectile core is inserted into an injection molding machine and then encapsulated by the casing, whereby the Übungsprojektil can be produced. Alternatively, the projectile core may also include an opening into which the projectile core is inserted or filled during manufacture. The latter is particularly advantageous when the projectile core is powdery.

The cartridge case can be made equally, first the cartridge bottom is inserted into the injection molding machine and then the sleeve part is molded. Alternatively, the cartridge bottom can also be pressed into the cartridge case.

The Übungsprojektil and the cartridge case can also be sprayed together, wherein the receiving portion 17 is formed between Übungsprojektil and cartridge case as a zone with weakened material cross-section.

Depending on the embodiment, the cartridge case is filled with a propellant, such as ignition powder prior to assembly of the projectile or before mounting the cartridge base.

Next, a primer is inserted into the receptacle 25.

In summary, with respect to the present invention, it can be said that due to the formation of the training projectile 1 of metal and plastic, a projectile can be provided which has a lower floor load in comparison with bullets of lead. The same applies to the cartridge case. 6

Further, due to the formation of the cartridge 14 as such, so the shape of projectile 1 and cartridge case 6, a cartridge can be provided, which can be used in conventional weapon systems. Another advantage of this projectile is the fact that the projectile can be produced more cheaply than cartridge ammunition, which is also very welcome. LIST OF REFERENCE NUMBERS 1 Exercise project 16 cartridge base 2 front area 17 receiving portion 3 projectile tip 18 lateral surface 4 rear area 19 face 5 projectile end 20 conical section 6 cartridge case 21 latching structure 7 projectile core 22 grooves 8th jacket 23 surveys 9 conical section 24 Ausziehrille 10 cylindrical section 25 admission 11 deepening 26 conical section 12 holding section 27 cylindrical section 13 surveys 28 inner space 14 cartridge 29 gain range 15 sleeve part 30 contact area

Claims (15)

1. A training cartridge (14) for use over a short distance, especially less than 100 meters, particularly preferably less than 50 meters, comprising a training projectile (1) and a cartridge casing (6), wherein

   the training projectile (1) comprises a front region (2) extending along a central axis (M) with a tip of the projectile (3) and a tail region (4) adjoining the front region (2) in the direction of the central axis (M) with an end of the projectile (5), wherein the tail region (4) is designed for accommodating the projectile (1) in a cartridge case (6), and wherein the training projectile (1) comprises a projectile core (7) made of metal or a projectile core (7) made of a mixture of plastic and metal or a projectile core (7) made of solid or loose metallic powder and a jacket (8) made of plastic surrounding said projectile core (7) and at least partly determining the external shape of the training projectile (1),

   wherein the cartridge case (6) comprises a casing part (15) and a base of the cartridge (16) joined to the casing part (15), wherein at least the casing part (15) is made of plastic, characterized in that the projectile (1) with its tail region is retained in an accommodating segment (17) in the casing part (15) by means of positive locking and/or force closure.
2. The training cartridge (1) as claimed in claim 1, characterized in that the projectile core (7) has the shape of a cylinder.
3. The training cartridge (1) as claimed in claim 1 or 2, characterized in that the jacket (8) completely surrounds the projectile core (7); or that the jacket (8) partly surrounds the projectile core (7), wherein the projectile core (7), preferably in the region of the tip of the projectile (3), protrudes out of the jacket (8), or wherein the projectile core (7) is flush with the outside of the jacket (8) in segments.
4. The training cartridge (1) as claimed in any one of the preceding claims, characterized in that the jacket (8), when viewed from the tip of the projectile (3), extends with a conical segment (9) in the front region (2), preferably with two conical segments (9a, 9b) with different angles, and then transitions into a cylindrical segment (10) and that
   the tail region (4) is essentially of cylindrical form.
5. The training cartridge (1) as claimed in any one of the preceding claims, characterized in that the tail region (4) comprises a retaining segment (12) with which the projectile (1) can be mounted in a cartridge case (6), wherein the retaining segment (12) is a recess (11) extending in the tail region (4) and about the central axis (M), which is bounded on both sides by the tail region (4);

   or wherein the retaining segment (12) is bounded by two elevations (13) surrounding the projectile (1) and extending outwards from the diameter of the tail region (4);

   or wherein the retaining segment (12) is bounded by one elevation (13) surrounding the projectile (1) and extending outwards from the diameter of the tail region (4).
6. The training cartridge (1) as claimed in any one of the preceding claims, characterized in that the projectile core (7), when viewed in the firing direction along the central axis, is disposed in the front region of the projectile (1), or that the projectile core (7), when viewed in the firing direction along the central axis, is disposed centrally between the tip of the projectile (3) and the end of the projectile (5).
7. The training cartridge (1) as claimed in any one of the preceding claims, characterized in that the projectile core (7) has a length in the firing direction that is smaller by a factor in the range from 2 to 5, especially in the range from 2.5 to 4.5, than the total length of the projectile (1) from the tip of the projectile (3) to the end of the projectile (5) when viewed in the direction of the central axis (M) and/or that the projectile core (7) has a diameter (D) that is smaller by a factor in the range from 1.1 to 1.8, especially by a factor in the range of 1.2 to 1.6 than the nominal diameter (DN) of the projectile (1).
8. The training cartridge (1) as claimed in any one of the preceding claims, characterized in that the projectile core (7) is made of a metal, such as steel or a non-ferrous metal, or of a metal alloy with steel and/or non-ferrous metals, and that the jacket (8) is made of a plastic, especially of an elastomer or thermoplastic, or of a plastic mixture, especially of elastomers and/or thermoplastics,
   and/or that the projectile (1) has a larger diameter (DH) in segments than the defined nominal diameter (DN) of the projectile (1), wherein the diameter (DH) is particularly preferably greater by a factor in the range from 1.05 to 1.1 than the nominal diameter (DN).
9. The training cartridge (14) as claimed in any one of the preceding claims, characterized in that the base of the cartridge (16) is retained in the casing part (15) by means of positive locking, bonding and/or non-positive locking, and/or that the base of the cartridge (16) is made of metal and/or plastic and serves the purpose of a receptacle (25) for an ignition cap.
10. The training cartridge (14) as claimed in any one of the preceding claims, if dependent from claim 5, characterized in that the accommodating segment (17) in which the projectile (1) is retained has an internal diameter (DI) that is smaller than the external diameter (D) of the projectile (1) in the vicinity of the tail region (4), which is disposed in said accommodating segment (17), and/or that at least one of said elevations (13), when viewed in the firing direction, is disposed after the accommodating segment (17) in the cartridge case (6), wherein said elevation (13) has a diameter (DV) that is larger than the internal diameter (DI) of the accommodating segment (17).
11. The training cartridge (14) as claimed in any one of the preceding claims, characterized in that the accommodating segment (7), when viewed in the firing direction, has a length along the central axis (M) that corresponds to the length of the retaining segment (12).
12. The training cartridge (14) as claimed in any one of the preceding claims, characterized in that the casing part (15) and/or the base of the cartridge (16) is made of a material selected from the group of elastomers and/or thermoplastics.
13. The training cartridge (14) as claimed in any one of the preceding claims, characterized in that the accommodating segment (17) is a zone with reduced material thickness, the projectile being joined to the casing part (15) by means of said zone by bonding, wherein said zone ruptures on ignition.
14. A method for manufacturing a training cartridge as claimed in any one of claims 1 to 13, characterized in that in a first step the projectile (1) is joined to the casing part (15), that in a second step the propellant is filled in the casing part (15) and that in a third step the casing part (15) is joined to the base of the cartridge (16), wherein preferably between the first step and the second step said projectile core (1) is inserted or filled into the projectile through the casing part (15).
15. A method for manufacturing a training cartridge as claimed in any one of claims 1 to 13, characterized in that in a first step the base of the cartridge (16) is joined to the casing part (15), that in a second step the propellant is filled in the casing part (15) and that in a third step the casing part (15) is joined to the projectile (1).

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