DE2034550A1 - Solid propellant with a short burning time and process for its production - Google Patents

Description

Zweibrückenstrasse 12 ■;.; /, ■.

Your reference your letter My reference E 1 22 day 8.7 * 1970

Patent application

Applicant: Jacques RAMONT, Rueil-Malmaison

Andre JEAN, Conflans-Saint-Honorine

Charles PRADELLE, Paris

Claude PIERRE, Yillepreux |

Michel IvIASSAY, Levallois-Perret

Solid propellant with a short burning time and process for its production. . -

The invention relates to a short solid propellant Brennzeib and its manufacture, that of thin powder particles that exist in strips, cylindrical rods, capillary rods or other shapes, the small ones Have Abbrennciuerschnltt.

The production of solid propellants with a short burning time (iri the G-röfiaenorder of a few milliseconds to tenths of a second), such as those used especially for the acceleration of short-range missiles or guided weapons or as a gas generator for r ^; icki3tosc-free guns are used, encounters numerous difficulties.

TJiο h'idfju tondfrte fJchvn.erigkeit iubi mechanical literature. The 'l'reibfiiibze are made of thin layers of powder or' files zuomrimenx'OBetzfc, which are finely divided; are. It can develop around V> or around cylindrical hollowness

1098 15/1271

IgS & Bjr * ^ ** 4 ^> ^ · ν « '* im

Letter dated July 8th, 1970 sheet 2 9 Π Ί / ξ ^r fl · Dipl.-lng. G. Schliebs

to the German Patent Office, Munich ^ UJ H ο O U patent attorney

be capillary rods or any other arrangement with a small focal cross-section. Such consisting of powder However, parts do not have a high inherent strength. In particular they do not have a high resistance to the acceleration effect and the gas streams and directed towards the nozzle in general, they are susceptible to all mechanical stresses that can occur, such as vibrations, shock loads etc. During the combustion, unburned powder pieces can be expelled through the nozzle, which calls into question the proper functioning of the engine.

The invention overcomes these disadvantages and proposes a method for producing a solid propellant for this purpose Burning time from individual powder parts in the form of strips, sticks or other parts with a small burning cross-section before, in which the powder parts are placed on an adhesive film, the dimensions of which correspond to the inner development of the one to be produced Propellant charge, in which the adhesive film with the powder parts is then in a cylindrical centrifugal form is inserted, the internal dimensions of which correspond to the external dimensions of the propellant charge to be produced, and in which then the centrifugal mold is set in rotation after entering a quantity of casting resin, which continues until the casting resin has cured is maintained, the amount of casting resin being measured in such a way that a defined embedment depth of the powder parts is achieved.

This process delivers solid fuel in which the individual powder parts are evenly and firmly embedded in a continuous layer of artificial stone. These drifting hats' K) are resistant to stresses both during lengthening and during transport (ijohw üi ^ urigeii, sleep) like me ^; ep; vuiiber Deamipruehungun when burning (command oiuii ^ iuig, Gaan brnlii an)

10 9 8 15/1271 BAD ORIGINAL

Sii7 «70 / Sheet 3 / Dip! .-! Ng. G. Sleep "

the German Patent Office, Lunchen 2 03 A 5 50 patent attorney

much more stable than conventional propellants. It can all known powder parts are used, namely such - with constant. Gas emission, depending on the chosen Geometry. '' '

In a modification of the procedure, the Powder parts on the adhesive film with a fabric, e.g. made of metal or fiberglass, before being placed in the centrifuge changed clothes. This cladding with a fabric that is completely soaked with the resin, the inherent strength is the propellant rate further increased.

In a further modification of the procedure, the The axis of the centrifugal mold is vertical, and its speed is adjusted to a desired embedding depth distribution of the powder parts matched, whereby an intrinsic strength variable over the length of the propellant charge can be achieved.

Another object of the invention is a after According to the method according to the invention produced pesticide propellant short burning time from powder parts, in which the powder parts on the outer circumference of the propellant charge with a defined depth in a layer surrounding the propellant charge on the outside made of plastic resin are embedded, in this Layer can also be embedded in a tissue. The solid propellants according to the invention can be used anywhere for Used where the desired operational reliability with conventional propellants is not sufficient.

In a special embodiment of the invention, as plastic resin, polyester resin with mineral salts, such as z.13. Barium sulfate, as filler ^{: be} selected. Due to the Püllütoff, an increased heat resistance of the synthetic resin I '/ O can be achieved, so that the embedding is up to the point of burning

109815/1271

BADORiQfNAi:

Letter vQm8 * 7.70 sheet 4 _ Dlpl »lfifh ft-SAIM»

to the Beutsehe Patentamt, Münohe »2034 5b 0 Patent Attorney

of the propellant charge fully effective

Further details and advantages of finding from the following description diesel; violate? - ■

Jig »1 in frontal row some. Distribution in the form of hexagonal capillary rods made of diJiin &&& erfindungsg0inäs3e frgibgatg Ρ§ϊϊ!

Fig. 2 in longitudinal ^ and cross section a combustion chamber ^and a first embodiment of the propellant charge

4 in longitudinal and cross section a combustion chamber ^ of a second embodiment of the propellant charge.

Powder parts 1 _? which can have the shape of strips, cylindrical or hexagonal hollow rods with multiple holes or capillary rods. As an example, hexagonal capillary rods are shown in FIG. 1, from which the combustion chamber shown in FIGS. 2 and 3 can be produced from a propellant charge according to the invention or, in short, a propellant charge according to the invention.

To carry out the method, the powder parts 1 are first put together in a rectangular shape, their Length of the final length of the propellant charge and the width of which corresponds to the finished inner diameter of the propellant charge. Ila.ndelt it is powder strips (z, 3, Figures 4 and 5), then these are arranged parallel to the axis of the propellant charge to be produced, in the other cases the pulvei are: - strands or parts laid together.

10 9 8 15/1271

^Bm

Letter dated August 8, 1970, ^sheet 5 DIpL-lng. G. Schliebs

to the German Patent Office, Munich 203 4 55 U patent attorney

In a further process step, the open side the powder parts assembled in the form with a Adhesive film "covered. The" carpet "formed in this way with the adhering powder particles can be handled as a whole and, in particular, introduced into a cylindrical shape.

This is done in the next step: The carpet may be after one or more layers of outer covering with a glass fiber fabric 3 in a cylindrical centrifugal mold introduced, the inner shape of the outer shape of the finished Propellant corresponds. A certain amount of casting resin 2 is then added to the lower part of the centrifugal mold.

The centrifugal mold filled in this way is then rotated offset. As a result, the casting resin is distributed evenly on the cylindrical inner wall of the mold, with the outer wall Perimeter of the powder parts 1 is embedded in the casting resin to a defined depth. If available, the outer casing 3 impregnated with the casting resin. The embedment depth of the powder parts results from the entered amount of casting resin and the geometric relationships in the Egg bed area. When the axis of rotation of the centrifugal form stands vertically, the embedment depth increases in dependence depends on the spin speed from bottom to top the axis of rotation is horizontal, then the embedment depth Constant over the entire length of the propellant charge.

After the casting resin has polymerized, it is spun finished and the propellant has taken its final form.

Only ala example were cylindrical after this process FeBt.stoffftreifczen with the following marks made-J50 represents:

109816/1271 _BA0 op.G.NAL

Letter of 8.7o70 sheet 6 Dipl.-Ing. G. Sehliebs

^to 'the German Patent Office, Munich 203A55U patent attorney

The powder parts that were assumed are in the form of hexagonal capillary rods with 19 holes. Three such capillary rods are juxtaposed in Pig. -1} seen in the forehead. The height of the capillary rods is now 15, a propellant charge comprises about 3500 capillary rods. The cylindrical length of the propellant charge is 150 mm, its outer diameter 110 mm, its inner diameter 80 mm. The burning time of the propellant charge is 5 ms, its mass is around 700 g ₃ The embedding depth can be a few tenths of a millimeter to a few millimeters. Polyester resin which contains mineral salts, such as barium sulfate as filler, can preferably be used as the casting resin. This resin already polymerizes at room temperature, which makes heating the centrifugal mold superfluous.

One corresponding to this embodiment of the invention Propellant charge is shown schematically in FIGS. An analogous embodiment when using powder parts in 4 and 5 show the shape of a strip.

The invention is not limited to the above dimensions, for example, much larger propellant charges can be produced within the scope of the invention.

10 9 8 15/1271 BAD

Claims (1)

ΊΟ Sheet 7, Btp!, «!« ^ & German Patent Office, Munich 2034 δ bP ■ Patent attorney ggjjnt anjsjar ügh e Process for the production of a solid substance with a short burning time. individual powder parts in the form of tubes, rods or other parts sound like AbbrenjaquergQimitteSj characterized in that the powder parts on an adhesive =. · are placed film whose A / biöessungen the innss'en £ h ** winding entspr§cheji of the produced propellant, the adhesive sheet dagp with the powder parts then in a Cylind = - rigehe spinner is inserted, whose InngnmsJe entspreehen the external dimensions of the product to propellant , and IQ that then the centrifugal shape after entering a Q-cast resin · = amount is set in rotation, which until the hardening of the. Casting resin is retained, with the semolina.quantity of such is dimensioned so that a defined embedment depth of the powder parts is achieved. 2 "The method according to claim 1, characterized in that the Powder parts on the adhesive film with a fabric ζ, Β, aui before being introduced into the centrifugal mold Metal or fiberglass clad. 5. The method according to claim 1 and 2, characterized in that when the axis of the centrifugal mold is vertical, its speed is increased a desired embedding depth distribution of the powder parts is coordinated. 4. Solid propellant with a short burning time, produced from powder particles by the process according to Claims 1 to 3, characterized in that characterized in that the powder parts (1) on the outer circumference of the propellant charge with a defined depth in a layer of plastic resin (2) surrounding the propellant charge on the outside are embedded, a fabric (5) can also be embedded in this layer. 109815/1271 BAO OPIlOJNAL Letter from July 8th * 70 sheet 8 DIpl.-Ing. G. Sdiliebi to the German Patent Office, Munich 2034550 patent attorney 5. solid propellant charge according to claim 4 »characterized in that that the plastic resin is a polyester resin with mineral salts, such as barium sulfate, which is a filler. 109815/1271