DE2145646A1 - Solid propellant in corrugated cardboard construction - Google Patents

Description

2U5646

Dipl.-Ing. G. Schltobt * 1 DarNHtatft Ludwig-Büdiner-Straee 14

Patent attorney Tetafon (06151) 62928

Post account Frankfurt a. M. 111,157 £ _n j _ "Bankers: German Bank AG, Darmstadt.

Telegrams: inventron

German Patent Office
Chicken 2

Zweibrückenstrasse 12th

IhrZaidwn your Sdir.ib «! M «n Z * k» wn E 192 _t Y To ₈ 10. 9 · 1971

* »». Patent application

Applicant: ETA'J? FRAWOAIS, represented by the Minister of State for national defense, Paris, (France)

Solid propellant in corrugated cardboard construction

The invention relates to a solid propellant in "corrugated cardboard construction".

Various solutions have hitherto been proposed for the production of powder-based solid propellants with short burning times (> 0.20 s) and relatively high momentum. On the one hand, heavily cut powder blocks were used, e.g. B. star-shaped blocks with inner and outer multiple arms, or blocks consisting of tubes with small inner and outer diameters. Such powder bodies are produced by casting or extrusion. On the other hand, propellant charges have been proposed which consist of powder plates of small thickness, which have reinforcing ribs or have spacers made of inert material. Such propellants are obtained starting from rolled or calendered powder webs. Finally, propellants based on cartridge powder have also been proposed, which is obtained by calendering or extrusion with subsequent cutting .

209822/0498 BAD

Letter from page 2 Dipl.-Ing. O. SdilUbs

to the German »Patent Office, Munich Patent Attorney

2H56A6

Sheets or blocks of powder in the form of corrugated cardboard have also been proposed to overcome the problems to solve, which result from rapid combustion, to increase the degree of filling of the combustion chamber and to reduce the erosive Keep combustion within limits.

The invention aims at propellant charges made of corrugated cardboard powder, which should offer the following possibilities:

- Build-up of propellants with a very short and even burning time;

- Build-up of propellant charges by assembling them from elementary propellant charges or wrapping such charges around a core;

- Structure of cellular propellants of novel, previously unproducible To shape.

For this purpose, the invention proposes a pesticide propellant in corrugated cardboard construction with a short burning time and high impulse, which is characterized by a structure of elementary propellant charges with at least one corrugated powder path, the one or is glued on both sides with a flat powder sheet. According to this principle, solid propellants can be used with the initially produce the required properties in a simple manner.

The invention also proposes that several elementary propellant charges are wrapped around a core. This results in rotationally symmetrical propellant charges in a simple manner.

The invention also proposes a cellular solid propellant before, in which several elementary propellant charges are wrapped around a core and then glued. Through this, that the elementary propellant charges in the form of smooth or corrugated powder strips are only glued after winding optimal conditions.

_BATH 209822/0498

Letter from sheet O Dipl.-Ing. G. Sdiliebs

to the German Patent Office, Munich 2145646 Patent Attorney

A solid propellant according to the invention can be advantageous composed of several elementary drifts. Such Propellants can be produced in novel, previously unrealizable forms. By assembling it lets In addition, the winding process can be saved, which in some cases offers advantages in production.

In a further development of the invention, the solid propellant can consist of several elementary propellant charges assembled and glued to form a block, the block being through mechanical processing is brought to the desired shape.

Solid propellants designed in this way, especially in the full one, glued together directly from the individual webs Modification with possible mechanical post-processing results in solid propulsion systems that are easy to manufacture and can be optimally adapted to the respective application.

In an advantageous embodiment of the invention, the solid propellant consists in each case of two successive ones corrugated sheets that are symmetrically glued to a flat sheet. This arrangement of corrugated and smooth webs is used in particular to build cellular propellant blocks.

According to a special feature here are two on top of each other The following corrugated sheets are glued parallel to a flat sheet. In this arrangement, the adhesive positions are of the corrugations of the two corrugated webs on a flat web offset by half wavelengths, whereby the flat Web can serve to equalize the tension between the corrugated webs.

If the solid propellant is a two-component propellant, optimal conditions can also be achieved from the fuel side set for the propellant charges according to the invention.

208822/0498

BATH

Letter from Biatt - "Dipl.-Ing. G. Schliebs

an .'1γλΓ-: JoUi '., GC ^; -O Püto .yl '.' V .:} ;, i "nC'iei · 2145646 Patent Attorney

V / g: .tore liinr-elhei ^ o ..! and '/ give the Erxindun · er ~ ebon üie c υ U-; rl ei ν folfGnoen '' «fr-i '^ iini! · - r? τ> i ι. "- n ^.] .- ■> η! - '' GJ-CV! ¹ !]!". In this ser f'o.i · -on:

_ '. ^il : L ' ^r ". 1 elementary' / 'reiKlndm-on in rr ^ -LOhiv.ti. ^

^{and ?} s-iollu - r

Pi -. ^: J oi ^ Gn durc- ¹ Äui'vn.ckelv one ', Honen ¹ '^; tTi ~ i? oi.hl an.f a l.orn> Ter ^r 'e3telte ~ n''' r ^ i ^ ca ^ r :;

:. ^? ir :. ^J ', _t by tin.runensetnen several "ylenent ^ .r ^ roi ^{? U1K} ' fertilize ^r -ei; ilde1; e J'reibs-"tr;e;

Jj'if · ;. 7 im Jy ^ n ^ snc ^ nitt a'reib.O ' ¹ .; -'": and

- ■ 'i ™. '/ a a' ^ n he, cut l. ^;: nrr? V1T ~ ^T 11 i? I '. ^; 'i'"·.'. ^!...

j.m folf-ends v / ird the l ^ findunr- anband oäno-c ber.; onriarcn Ausnbeisriielfi boon rays.

For Jierctellun- "· der fev;". Hlton Pulverbahnoi " ¹ a '' v / eiliomnonenten-Palverbalni (jni? Der '""isinfrom'iitronelli'lose: itror: 1, 7. ^ Orin Z) fi'nrf Iiinuten LAN "in a'ijf ^r) 0 ° (J e.rv;"! rmten siasser eicbt a ^rr ev / aoflann ¹ ^ e ?. Kalandertenmeivi a rar \ ^r on 80 C over a Walr.e ouf a thickness from 0, ^r ; am P- now ¹ TaIaH di-iert. The calendered 7'ahn v / ird in rec ^ .techi ^ e plates of 230 :: 70 mm p: eücbschnitt. J) iece plates have been on a Wellvoirricntun'-T rf-owe3.lt.

To make dej; flat powder strips or slats cut a calendered powder sheet into rectangles that are slightly wider than the corrugated sheets or "sheets".

Then a flat plate 2 is on one side corrugated plate 1 (^ i ^. 1) glued, or it will be r-white

209822 / 0A98 BADORiGiNAL

Letter from the sheet [) Dipl.-Ing. G. Schliebs

the German Patent Office, Hünchen 2 Ί 45646 patent attorney

flat plates on the two sides of a corrugated plate (Fig. 2) glued. Nitromethane can be used as an adhesive the gluing takes place under slight pressure.

In this way, elementary propellant charges or plates in "corrugated cardboard form" are obtained, from which complete propellant charges are made let form. For this purpose, either elementary propellant charges i, 2 can be wound around a core 4 (FIG. 3), the resulting propellant charge outside of a barrier 3 made of inert Material can be enclosed, or several elementary propellant charges are put together to form a block (Fig. 4- and 5) · A large number of elementary propellant charges can also be used Glue together to form a block that can be turned or milled into the desired shape to form a cellular solid propellant charge (Fig. 6), the shapes and dimensions of which are novel and do not differ Let extrusion be achieved. Thus propellant charges according to the invention can have the shape of cubes, cones, double cones, etc., what multiplies their possible uses.

After processing, the cellular fuel blocks can be stored in the Engine housing 6 can be mounted on a plastic sole 5 (Fig. 7 and 7a).

The propellant charges according to the invention have numerous advantages. In particular, the manufacturing process is simple and inexpensive. The powder webs can be reproducibly calendered to a uniform thickness and thus allow production of propellants with a very short and even burning time. The mechanical properties of the propellants are good and give a high resistance to all stresses that occur. The powder composition can be arbitrary change as well as the thickness of the flat and corrugated webs and the wavelength and amplitude of the corrugations. This allows the narrowing coefficient of the engine

209822/0498

BAD ORiQINAL

Letter from sheet β Dipl.-Ing. G. Loves

to df: c German Patent Office, Munich ^ - I4üb4b patent attorney

Bring to the desired value, and the erosive berries z can be limited or favored according to V / ung, and the other properties of the can also be with a propellant after the -Crfindunr; equipped engine specifically change.

BAD ORiGINAL

209822/0 * 98

Claims (4)

Letter from the sheet r 'Dipl.-Ing. G. Schliebt at the Dontnche Patent Office, rünchen 214-5646 Patent Attorney Patenji ^ j ι s urn ehe 1. l ^? ertsto: ^r '"rreibnotr; in Wellkarhonbnuuoise, fekonnrie by an Avfhau from lSlementartreiK.Uidunp; en nil; at least one corrugated Pi τ 1" rc. rl j; ahn (Ό, the one or both sides glued to a flat Pnlverbabn (2) int. ^. l-'entctofftreibsat :: nacl? Anfj ^ ruch 1, dadu.ro ¹ ! r "e]: ennr, eic? inei-> that several jvlementnrtreibladunren (1,?)"! in: a core (4) are wound. 3 · Zelli'-er .Pectstof / itreibnotn according to claim 1 Tind 2, because several J-JlenentartreiMpdiin ^ en (1, 2) wrap around a core (M-) r-eklebi ; aind 4.! '' Estijto'Tkreibsot ^ after AiiGpinich 1,. "Ol.erm ^ eicbnet by meh.rere r.usfxminen.-reset Klementariii ^ eibladun -'- en. ^l ). Solid matter drifts: according to Annnruch M-, back- nr-calibration; by nio'nrox'e r: -u one block r.nsamraon · οεοϋ :; ^Η ο and glue: e ElementarI; Reibladunn; en _? v / obei '' he Jilocl ·: brought by mechanical Benrl5eitun ° · to the «'-evr'mächt!'" Orm ifjl ;. ^r . ! '' eotfrfcof -'- 'i-Reibn-'tr; according to claim. Λ and ⁷ J or [~> ₉ by .ejcennr ^ eichnei;, that. Each "v / ei one on top of the other3 '^{> the} following ^ q v; elles-ancestors (Ί) s ^ / niaetrisc ¹ ' ¹ mi oiue level ^T Vihn ( 2) ^r ~ o -]; are alive. ?. Solid propellant charge according to claims 1 and 3 or '^, characterized by the fact that / 3 _t iev / e.ils r, v; o: l consecutive ^ e- \; elle lanes (1) parallels laughing on a plane. "Hahn (2)" are o Kleb't. ^; >. Solid propellant according to one or more of claims 1 to 8, characterized in that the solid propellant is a two-component propellant. 20982 2/0498 BATH