DE2019555A1 - Shaped charge with inlaid metal screen - Google Patents

Description

Dipl.-Ing. G. Schliebs 61 Darmstadt Ludwig-Büchner-Sfraße 14

Patent attorney phone (06151) 62928

Postal checking account; Frankfurt a. M. 111157 Bank details: Deutsche Bank AG., Darmstadt To the telegram: inventron

German Patent Office

Munich 2
ZweibrUckenstrasse, 12

Your sign Your letter My sign E 119 day 16.4 * 1970

Subject = patent application

Applicant: ETAT PRANCAIS, represented by the Ministre des Armees, Paris (France)

Shaped charge with inlaid metal screen «

A shaped charge comprises a detonator, possibly an ignition charge, an explosive charge with a hollow surface and one in the Hollow surface inlaid metal screen. For the shaped charge to work satisfactorily, the outer surface of the metal screen must independent of expansion and shrinkage processes remain in it or in the explosive charge in close contact with its hollow surface.

Some newer explosives have the peculiarity of shrinking after being reshaped or shaped. The shaping takes place directly on the metal screen of the shaped charge.

For the production of shaped charges, two methods are mentioned as examples, which lead to a shrinkage of the shaped charge to lead. In one process, explosives with a plastic bond are hot-pressed, with the shrinkage taking place in the Cooling occurs. The other method uses multi-component explosives polymerized, the shrinkage occurring during artificial aging.

009887/1299

Letter dated April 16, 1970 sheet 2 Di> L, in ». &

to the German Patent Office, Munich Patent Attorney

The explosive charge exerts an effort on the metal screen over time. The resultant this effort runs axially in the direction of the explosive effect, which has different poles. First of all, üer Metal screen are pushed out of the explosive charge or at least the contact between the metal screen and the explosive charge be worsened. If you try to prevent this by applying a pretension to the metal screen, then this favors a better behavior of the shaped charge and prevents the metal screen from peeling off.

The invention aims at a shaped charge Take advantage of the bias of the metal shield and at the same time the disadvantage of faulty contact between To avoid metal screen and explosive charge completely. For this purpose, the invention suggests using with shaped charges inserted metal screen to provide the jacket of the metal screen over its length with several circumferential grooves and to connect the pressed-on or molded-on explosive charge to the screen in a shear-proof manner via the grooves.

Due to the arrangement according to the invention, there are any dimensional fluctuations between the metal screen and the explosive charge permanent close contact between these two parts is guaranteed. The direct molding of the The explosive on the metal screen creates a mechanical pre-tensioning system between the metal screen and the explosive charge generated, which improves the behavior of the shaped charge.

Details of the invention emerge from the following description of an embodiment that is shown in FIG Drawing is shown. This shows a longitudinal section through a shaped charge «

009887/1299

Britf vom ¹ ^ .4-.70 Blaft3 Dipl.-lng. O. SdilM »

to the German Patent Office, Hünchen Patent Attorney

A metal screen d is in contact with its outer surface ir. with an explosive charge c. The outer surface of the metal umbrella i ^ t provided with grooves e perpendicular to the Rotate the central axis of the screen. In the example there are three Grooves provided; However, their number can be arbitrary and in particular as a function of the desired shear strength determined by the observed amount of shrinkage of the explosive charge A. About the formation of the gas flow during the detonation not to disturb, the grooves are sufficiently small.

2er Ljpr <-nrstoff can be molded directly onto the metal screen using one of the usual methods. The grooves in the L '. et ^ II screen on the one hand maintain the essential close contact between the explosive charge and the

rm and on the other hand the creation of a preliminary system in explosive charge and metal screen, which improves the behavior of the shaped charge.

These effects occur regardless of the cause the dimensional changes between explosive charge and ... etillPCiiirni have, so whether they are thermal or mechanical K-itur find or occur during manufacture or storage

lie execution can be described in detail within the scope of the invention acrew changed to give them the special shape of the Adjust shaped charge.

009887/1299

Claims (1)

Letter dated April 16, 1970 sheet 4 DJpl.-lnfl. β. Stokes to the German Patent Office, Munich patent attorney Claim Hollow charge with inlaid metal screen, characterized in that the dumbbell dee metal screen (d) strand over its length with several circumferential Hillan (e) and the screen is firmly connected over this with ά @ τ pressed or molded explosive charge (e).