DE102009049440A1 - sabot - Google Patents

Abstract

Proposed are a sabot (1), characterized by a complete, but at least partially constructed of a foam material and a method for producing such a sabot (1). The foam material may be a metal foam such as aluminum foam, zinc foam, Foaminal, etc., wherein the foam material as a sandwich component with layers of the same or another material, a reinforced fiber material such as carbon fibers, metal fibers, etc. and / or a Core can be used from a different material. This makes it possible to provide parts of the surface of the sabot (1) with a different material than the residual body.

Description

The invention relates to a sabot of foamed materials and a method for its production.

Sealing mirrors are used in sub-caliber projectiles and shotgun shells, on the one hand to obtain a seal against the propellant gases and on the other hand to ensure a guidance of the projectile in the barrel. So is out of the AT 313 754 a sabot projectile known with a sabot, which is divided by axially extending slots into segments. In the DE 199 29 915 A1 reflects the interaction of cartridge and sabot or sabot. A method for producing a segmented sabot describes the DE 10 2004 017 674 A1 ,

Sealing mirrors are usually made of metals such as aluminum, plastics or composites. A sabot body with method is the CH 693 008 A5 removable. The DE 80 23 382 U1 however claimed a sabot of metal parts and plastic, wherein the metal parts are executed in stamped sheet metal. The DE 103 35 273 B4 describes a method and an apparatus for producing a multi-part drive ring for a subcaliber bullet in fiber composite construction.

Since the sabot must be accelerated with, but does not contribute to the effective mass of the projectile, the sabot should be as light as possible, to use little energy. At the same time, however, the sabot must also be strong enough to absorb the forces occurring during acceleration. Metals have a high strength, but also a high density, d. h., The sabot will always be heavy, plastics in turn have a low material strength, so they must be made stronger and / or strengthened and the weight advantage over the metal is at least partially canceled.

Here, the invention has the object to reduce the weight of propellant mirrors while maintaining their functionality.

The object is achieved by the features of claim 1. Advantageous embodiments are shown in the subclaims.

The invention is based on the idea of producing the sabot or the sabot segments from material foams instead of the solid material. For example, metal foams, such as aluminum foam, zinc foam, foaminal, etc., are suitable as material foams. The foam material can be used or used either directly or in combination. In particular, if higher demands are placed on the material, the foam can be used as a sandwich component with layers of the same or a different material, with reinforced fiber material, such as carbon fiber or metal fibers, etc., as well as with a core made of another material.

By using a foam material (eg aluminum foam 0.4-1.0 g / cm ³ compared to aluminum 2.75 g / cm ³ ), a reduction of the weight can be realized. Along with the reduction, the reduction of the use of materials and the better adaptation of the material to sliding on the tube wall and better guiding / sealing of the projectile are advantageously achieved. Because it is now possible to use a different material at the contact surface to the gun barrel than the rest of the body.

So proposed are a sabot, characterized by a complete, but at least partial structure of a foam material, and a method for producing such a sabot.

The foam material may be a metal foam such as aluminum foam, zinc foam, Foaminal, etc., wherein the foam material as a sandwich component with layers of the same or another material, a reinforced fiber material such as carbon fibers, metal fibers, etc. and / or a Core can be used from a different material. This makes it possible to provide parts of the surface of the sabot with a different material than the residual body.

Reference to an embodiment with drawing, the invention will be explained in more detail.

It shows the only, slightly sectional figure a sabot 1 consisting of at least two sabot cages or segments 2 . 3 which, in a known manner, emerge from the bullet core (penetrator) which does not come closer to the weapon barrel 4 solve and fall off. The sabot segments 2 . 3 be at least partially made of a metal foam 5 etc. formed, for example, in sandwich structure, the main body or the segments 2 . 3 forms.

The production of the sabot 1 is mixed from a base material, preferably in powder form and possibly with the addition of composite fibers and additives and a necessary amount of blowing agent and pressed into a frothable blank. This can be done either by batchwise pressing, extruding, (co) extruding, isostatic pressing etc., that is, in any known type of compacting / compressing gescheen.

Furthermore, the mixture on a support material, for. B. metal sheet applied and solidified to a so-called sandwich structure.

For propellant charges having a more complex geometry or a core of another material, the mixture may also be added directly to a corresponding mold.

By (co) extrusion or layers of different material mixtures also different foams can be produced.

After molding and shaping the blank or filling the non-illustrated molds of the manufacturing apparatus, the material is heated and expanded by the blowing agent. As a result, a foamed body is formed, which could possibly be further processed mechanically or can.

In addition, a further material could be applied by thermal spraying in order to be able to modify the contact properties to the tube.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• AT 313754 [0002]
• DE 19929915 A1 [0002]
• DE 102004017674 A1 [0002]
• CH 693008 A5 [0003]
• DE 8023382 U1 [0003]
• DE 10335273 B4 [0003]

Claims (10)

Sabot ( 1 ) characterized by a complete, but at least partial structure of a foam material. Traction mirror according to claim 1, characterized in that the material foam may be a metal foam such as aluminum foam, zinc foam, foaminal, etc. Sling mirror according to claim 1 or 2, characterized in that the material foam can be used as a sandwich component with layers of the same or a different material, a reinforced fiber material, such as carbon fibers, metal fibers, etc. and / or a core of another material. Sealing mirror according to one of claims 1 to 3, characterized in that parts of the surface of the sabot are provided with a different material than the residual body. Method for producing a sabot ( 1 ) of foam material, characterized by the steps of: • mixing a base material, such as metal, such as aluminum, zinc or the like, possibly with the addition of composite fibers and additives and a lot of blowing agent, • heating the mixture, wherein the blowing agent expands and a foamed body creates, preferably while simultaneously compressing the foamed blank. A method according to claim 5, characterized in that the mixture can be applied and fixed on a carrier material. A method according to claim 5 or 6, characterized in that the compression by batchwise pressing, extrusion, (co) extruding, isostatic pressing, etc., takes place. Method according to one of claims 5 to 7, characterized in that different foams can be produced by different material mixtures. Method according to one of claims 5 to 8, characterized in that on the surface of the sabot ( 1 ) at least partially another material can be applied. A method according to claim 9, characterized in that the application can be realized by a thermal spraying.

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