EP3076121B1 - Smoke projectile - Google Patents

Description

The invention relates to a smoke throwing body with a pyrotechnic active charge, wherein the active charge is received in a plastic casing, wherein at least one pyrotechnic separation means is provided for separating the plastic casing.

For the protection of armored and unarmoured vehicles, smoke projectiles are used, which are fired in the case of a threat situation. The smoke missile comprises a pyrotechnic active charge which, when lit, emits a mist which protects the vehicle or vehicles to be protected against detection, detection and target tracking and thus against a missile threat. The nebula emits in the infrared spectral range and is opaque in the visual spectral range. Since the threatening missiles approach at speeds of 200 to 600 m / s, after their detection, a nebulization must take place very quickly.

Such a misting body is made, for example DE 10 2006 008 309 B4 known. The active charge used there is welded in a plastic sheath in the form of a plastic film. To separate this plastic film self-adhesive black powder films, so-called tapematch, are provided which are arranged around the active charge around, so are between effective charge and plastic film. This plastic film is usually in a shrinking process, comprising the effective charge attached.

For separating the plastic film, it is necessary to ignite the black powder films, for which purpose they are to be connected to an ignition means. This is complicated due to the arrangement of the black powder films around the active charge around realize, since the ignition is arranged outside the plastic casing. In addition, the black powder films are also thermally stressed during the shrinking of the plastic jacket, which may affect their functionality.

The invention is therefore based on the problem of specifying a smoke throwing body, which is improved in contrast.

To solve this problem, it is provided according to the invention in a smoke throwing device of the type mentioned in the introduction that the separating means is arranged on the outside of the plastic casing.

Unlike in the prior art customary, the at least one separation means on the outside of the plastic sheath, which may be, for example, a plastic film, attached, that is, the plastic sheath is attached first, after which the release agent is positioned first. Thus, this is not affected or burdened by the attachment process of the plastic coating, so for example, the shrinking, since the release agent is attached later. In addition, the outside arrangement of the separating means makes it easier to connect it to the ignition means, as which, as will be discussed below, for example, an explosive ejection charge driving the active charge can be used.

Preferably, a plurality of circumferentially spaced separation means are arranged on the outside of the plastic casing. For example, can be arranged on the usually cylindrical outer side four offset by 90 ° separating means, that is, that the plastic casing is separated at four positions simultaneously based on the outer cylindrical surface.

The or each resolving agent used may be formed as a coating or as a release film. A pyrotechnic ignitable coating is applied to the plastic coating, for example by brushing or printing or the like. Preferably, a release film, which is preferably adhered to the plastic jacket, is used. This film can be easily applied, especially if it is self-adhesive.

Regardless of whether a coating or a release liner is used, the particular resolving agent used should be based on black powder. That is, either a black powder-based coating or a black powder-separating film, a so-called tapematch, is preferably used.

The smoke grenade usually has a housing in which the active charge is added together with plastic sheathing. In order to drive the active charge out of the housing, an ignitable ejection charge is provided on the housing side, the or each separating means, in particular separating film, being arranged on the active charge in such a way that it can be ignited by the igniting ejection charge. Due to the fact that the separating means or preferably the separating film is arranged on the outside of the plastic casing, it or it is much easier to bring into the effective range of the igniting ejection charge. The ignition happens because hot particles that are created during ignition can strike the outer separating foil directly so that it can be ignited immediately. This is particularly improved if, as is also provided according to the invention, the ejection charge is arranged at the bottom of the housing, and the or the separating means along the underside of the active charge or the plastic casing, the ejection charge opposite, are guided. This means that the separating means, ie the separating film, is not only arranged on the cylindrical outer side of the plastic casing, but also in the region of the underside, at which either the active charge is exposed or which is also edged over the plastic casing. The underside of the discharge charge is directly opposite, so that igniting the ejection charge directly or the separating means are ignited.

Fig. 1

eine Prinzipdarstellung im Schnitt durch einen erfindungsgemäßen Nebelwurfkörper, und

Fig. 2

eine Perspektivansicht des in eine Kunststoffummantelung eingeschweißten Wirkkörpers nebst daran angebrachten Auftrennmitteln.

Further advantages and details of the invention will become apparent from the embodiment described below and with reference to the drawings. Showing:

Fig. 1

a schematic diagram in section through a smoke throwing body according to the invention, and

Fig. 2

a perspective view of the welded in a plastic sheath active body together with separating means attached thereto.

Fig. 1 shows a smoke throwing body 1 according to the invention with a pyrotechnic active charge 2, which is arranged in a hollow cylindrical housing 3. The Pyrotechnic active charge 2 serves to generate a fog emitting in the infrared spectral range and opaque in the visual spectral range. It can be formed by means of a plurality of individual, similar active elements and mass elements, which are arranged in a disk or plate stacked together. It is also conceivable, however, to use as active charge 2 two different active bodies made of different materials. The one, possibly also a plurality of active elements and mass elements comprehensive active body causes a temporally fast fog construction, while the other, optionally also several active elements and mass elements comprehensive active body has a long burning time.

The active charge 2 is, as will be discussed below, in a plastic casing, preferably in the form of a plastic film, wrapped or welded. This plastic casing is, as will be discussed below, separable when firing the active charge.

To shoot the active charge, a discharge charge 4 is provided, which is arranged in the region of the bottom 5 of the housing 3 and is received in a corresponding recess of a base plate 6 arranged there. Their ignition is via an electronic control unit 7.

For ejection, a bore 9 is formed in a gas pressure disk 8 arranged on the housing bottom 5, via which the pressure generated upon ignition of the ejection charge is transmitted to the active charge 2, which is then expelled from the housing 3 closed by a closure cap 10.

Fig. 2 shows the active charge 2, which is accommodated in a plastic casing 11, here in the form of a shrunk-on plastic film. This plastic sheath 11 surrounds in the illustrated embodiment, the active charge 2 on all sides, ie in the cylindrical outer surface and the top and bottom surface, wherein Fig. 2 a view of the bottom surface 12 shows. This bottom surface 12 is arranged in the mounting position of the bore 9 opposite one another. Alternatively, the active charge in the area of the top and bottom surfaces can also be partially exposed.

In the example shown, a plurality of pyrotechnic separation means 13 are arranged on the outside of the plastic casing 11, with self-adhesive black powder separating films 14 being used here as the separating means. These slides are strip-shaped and, as self-adhesive, can be easily glued over the corresponding adhesive coating on the plastic casing 11. They extend axially along the outside of the plastic casing and are guided so that they intersect at least on the bottom surface 1. In the assembly position, the crossing region 15 lies opposite the bore 9. As a result, upon ignition of the ejection charge 4, the resulting hot particles strike the release films 14 directly in the crossing region 15, so that the release films 14 are ignited immediately and directly Consequently, an immediate separation of the plastic casing 11 in the region of the bottom 12 as well as along the lateral surface comes. If the cover surface is also covered with plastic film, the release films 14 also intersect in the opposite ceiling region, so that the separation takes place there as well.

The burning off black powder of the black powder separating films 14 then ignites the active charge 2 itself, which, as described, may consist of only one active mass or one effective mass type, but also of a plurality of individual, possibly also different fog tablets and active mass blocks. This means that on the one hand an immediate and safe separation of the plastic casing is ensured, but also an immediate ignition of the active body itself.

Another advantage of the outer separating film 14 is further that it improves the ejection of the received in the plastic casing 11 effective charge from the housing 3. During ejection, the active charge still received in the plastic casing slides on the separating films along the housing inner wall, which leads to a reduction of the friction between the housing 3 and the active charge.

LIST OF REFERENCE NUMBERS

1

A smoke

2

active charge

3

hollow cylindrical housing

4

ejection charge

5

ground

6

baseplate

7

control electronics

8th

Gas pressure washer

9

drilling

10

cap

11

Plastic sheathing

12

floor area

13

severing

14

Auftrennfolie

Claims (8)

1. Smoke grenade with a pyrotechnic main charge, the main charge being accommodated in a plastic casing, at least one pyrotechnic separating means being provided for separating the plastic casing,
   characterized
   in that the separating means (13) is arranged on the outer side of the plastic casing (11).
2. Smoke grenade according to Claim 1,
   characterized
   in that a number of circumferentially spaced-apart separating means (13) are arranged on the outer side of the plastic casing (11).
3. Smoke grenade according to Claim 1 or 2, characterized
   in that the or each separating means (13) is formed as a coating or as a separating film (14).
4. Smoke grenade according to Claim 3,
   characterized
   in that the one or more separating film(s) (14) is/are adhesively attached to the plastic casing (11).
5. Smoke grenade according to Claim 4,
   characterized
   in that the one or more separating film(s) (14) is/are self-adhesive.
6. Smoke grenade according to one of Claims 3 to 5,
   characterized
   in that a coating based on black powder or a black-powder separating film (14) is used.
7. Smoke grenade according to one of the preceding claims,
   characterized
   in that a housing (3) is provided, in which the main charge (2) is accommodated along with the plastic casing (11) and on which an ignitable expulsion charge (4) expelling the active charge (2) is arranged, the or each separating means (13), in particular separating film (14), being arranged in such a way that it can be ignited by the igniting expulsion charge (4).
8. Smoke grenade according to Claim 7,
   characterized
   in that the expulsion charge (4) is arranged on the bottom of the housing (3), the separating means (13), in particular separating film (14), being led along the underside of the main charge (2) or the plastic casing (11), opposite the expulsion charge (4).

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