DE1771087C3 - Monobasic or polybasic propellant charge powder and process for its manufacture - Google Patents

Description

familiar to the person skilled in the art. The prerequisite for the success of the working method is that it gels the powder base materials used solvents are chosen so that the to be incorporated Granules are retained as such 5 during the manufacturing process. This can be achieved through the solvents, as well as through appropriate coordination of the components used for granulate production, especially the nitrocellulose. The solvents used for these 10 Usual purposes, such as methyl alcohol, ethyl alcohol, ethers and their mixtures. acetone and the like

The liveliness of the powder allows for its calorie content. Burn rate and amount of wrapped Adjust the granulate.

The following examples are intended to explain the production and the advantages of the propellant charge powder according to the invention in more detail, but do not represent any limitation the application possibilities or definition 2c of the process execution.

1st full strand, 5.5 mm diameter,

2nd single-hole strand, 5.5 mm diameter, bore 1 mm,

3. single-hole cord. 5.5 mm diameter, bore 2 mm,

4. Seven-hole strand, 9.29 mm diameter, 1.2 mm diameter holes

and dried according to the following rhythm: 12 hours at 30 "C,

ι from IO mm

of the powder was known in: '! i

12th hours at 45 C, 24 hours at 60 ¹ C. After dry on Lii cut.

The animation A f J ™ ^
the manometric bomb

example 1

A nitrocellulose base with the following composition:

56.3 ⁿ 0 nitrocellulose (10.91 "nitrogen) 37.5 ° u nitrocellulose (13.15" / o nitrogen) 0.8 ". Diphenylamine

3.5 ° / n centralite I.

1.4 ⁰ O dibutyl phthalate

0.5 ° 0 Na oxalate

100.0 ° / 0

25th

was supplied with an acetone-alcohol mixture. The nitrocellulose used is moist with alcohol, it contains 25 ° 0 alcohol. For gelation, 65 cm * acetone and 250 cm ^:! Alcohol used. With the alcohol-moist nitrocellulose, 240 cm ^{3 of} alcohol are added, so that 490 cm ^{3 of} alcohol and 65 cm ^{3 of} acetone are used for 1 kg of dry powder raw material. The approach was worked through in a horizontal network for 90 minutes. Heat of explosion of the Nc matrix 620 cal / g.

On 50 parts by weight of dry Nc base material 50 parts by weight of a POL powder granulate 1 mm in diameter and 1 mm in length and the following Composition incorporated:

Measured way. The results - »nd in curves 1α to Aa of FIG. 1 reproduced.

For comparison, nitrocellulose powders of the same dimensions and, if possible, the same explosion w; ^: rme shot and the results are shown in curves 1 to 3.

All powders are tested without surface treatment.

All granular powders burn progressively over a major part of the load while Burn off granulate-free powder progressively only in the seven-hole configuration.

Compared to the comparison powders, the powders according to the invention show a significantly increased burnability, in the case of full strand powder, the Λ value after 20 ° / »burn-off is 23 compared to 7 in the case of Comparison powder.

35

50.23% nitrocellulose (12.75% nitrogen) 42.78% nitroglycerin

1.00 Vo dibutyl phthalate

1.50% acardite

2.86 ⁿ / o lead salts

0.05% magnesium oxide

0.05 "/ ο graphite

O, O5o / "wax

1.48 0/0 soot

100.00%

After adding the FOL powder granulate, the The mass was kneaded for another 30 minutes.

The granulate-containing mass produced in this way became the following strand shapes on a hydraulic press obsolete.

Example 2

The whole strand powder produced according to Example 1 became one which is known per se and is described below Subjected to surface treatment.

The cut and dried powder was ^{treated in a polishing drum at 60 ° C. by spraying on 40 n} / o dibutylphthalate-containing ethanol solution. This pretreatment takes 30 minutes. The amount of the solution was measured in such a way that 2 "o dibutylphthalate resulted in relation to the powder used. A solution was then made from:

50 percent by weight ethanol

33 weight percent dibutyl phthalate

17 weight percent Centralit!

one

sprayed on in an amount that relates to powder 2 ", c dib'ithylphthalate and 1 ¹ Vo Centralit er Wähd di Bhdlung became a T

drew 2, c dyp

give. A temperature of 60 ° C. was maintained during this treatment, the duration of the Tmmmel 60 minutes. Then graphite was added in an amount of 0.03 percent by weight (on the powder related) blown in.

The powder treated in this way was bombarded in the manometric bomb and the results in FIG. 2 reproduced as curve 1 b.

Compared to the curve of the unbehi>"dellen powder 1 α the surface-treated powder exhibits a more pronounced progressivity without significant reduction of Abbrandlebhafligkeit.

Example 3

While maintaining the working conditions given in Example 1 were in the same Nitroccllu-4 Gih d lih

Granules incorporated and pressed into the same strand powder.

The results of the bombardment in the manometric bomb produced results similar to those in the Darsteli i i

losc basic mass 40 percent by weight of the same 5 lung 1 recorded are comparable.

1 sheet of drawings

Claims (6)

can be achieved. This propellant charge powder is characterized in that it contains powder granules enriched in the powder mass in the axial direction, which are lower than the powder base mass. 1. Single-base or multi-base burn rate that differs from strands. The Herpreßtes and cut propellant charge powder, position is in a technically particularly simple 'Veise characterized in that it is possible that a mixture of a pressed powder mass enriched in the axial direction, capable powder base mass with the powder granulate in it suspen, which compared to the powder-powder-founded granules in a conventional manner vergrundmasse different Brenngeschwin- io xu extrudates and these are comminuted speed has. As you can see, this makes it possible to use 2. Propellant charge powder according to claim 1, a full strand powder that has the burning characteristics of a characterized in that the powder granules multi-hole, z. B. to achieve seven-hole powder, different geometric shapes such as B. with the full strand powder the advantage of the higher Spherical shape, star cross-section or cross-wagon wheel density. Another advantage of this pulse cut has. vertyps is the ability to enhance the vibrancy of the 3. propellant charge powder according to claim 1, da- powder characterized in that the proportion of powder / cm ² \ granulates up to 80 ° 0, based on the dry \ A '\ n "j ^ Tj J Powder base ?. amounts to. 20 · 4. Propellant charge powder according to claim 1, adjustable to values that are 2 to 3 times as high characterized in that the grain size of the powder previously used. Granules about ¹ second to "2 of the weaving strength of the powder production according to the invention is the Powder grain is. Observation that in the soft powder 5. Process for the production of the propellant charge 25 pressed mass the harder granules float and Powder according to claims 1 to 4, thus identified during pressing in the faster running zones, draws that the powder as full or perforated that are z. B. in the case of full strands, the central zones on the cylinder is shaped. enrich. On the outside, the granulate is with the 6. Process for the preparation of the propellant powder molding compound. For making the Charge powder mch claims 1 to 5, characterized in that 30 propellant charge powders according to the invention are specifically characterized that the powder is advantageous in addition to a specially long cut powder strands, Oberfüichenbv_nnung known per se according to the method principle according to the invention is thrown. can propellant powder of the most diverse Types are produced. For example, it is possible to convert a powder base material from a solution medium-containing nitrocellulose, nitrocellulose / explosive oil or three-base powder a granulate made from one of the aforementioned powder mills, but that has a different, in particular higher, burning speed. The granules in turn, their properties can be modified In the case of propellant charge powders, in addition to a high charge, for example made of porous material, a progressive burn-off is aimed for in order to keep one. With the POL powder granules, the most even possible thrust in the gun barrel with a wide range of options in terms of calorie content must be achieved. It is customary to meet this requirement by appropriately shaping the powder grain, e.g. B. as give. In the case of polybasic propellant charge powders, e.g. B. single-hole or multi-hole powder and / or by upper explosive oil and / or nitroguanidine-containing powders is surface treatment of the finished powder grain with the incorporation of granules in the same way phlegmatizing agents such. B. Solutions with possible. In this way, a person skilled in the art can obtain camphor, centralite or plasticizers. The aftertreatments are for all propellants that he is able to use a propellant powder from the specified powders due to the per se loading powder types, monobasic and polybasic, known properties of the various powder explosive oil-free and explosive oil-containing nitrocellulose components and nitroguanidine-containing powders possible to produce firing characteristics,
and usual. In these aftertreatment processes, the proportion of powder granules can, however, be relatively difficult to vary widely and, for example, to be carried out up to in such a way that a fully satisfactory amount of 80%. The grain size of the granulate results are obtained, and the powders produced, of course, on the extruded diameter only partially meet the requirements with regard to the or, if multi-hole powder are produced, to match the desired progressive burn-off at the same time as the weaving strength. The grain size should require high loading density. approx. Va to V * of the weaving strength of the powder grain In the case of the propellant charge powder according to the present invention. the invention is the modification of the burning In special cases it may be indicated that characteristic, in particular the production of a burn-off behavior of the powder grain in addition progressive powder neither by surface treatment by a surface treatment known per se treatment by geometrical shaping or by making perforated cylinders achieved, so that the disadvantages of the aforementioned ver to vary. The implementation of the method according to the invention omitted and also a high loading density ßen method is due to the above information