WO2009018899A1 - Method for connecting tubular parts containing lignin and use of said method for connecting the casing sleeve and casing cover of a cartridge - Google Patents

Method for connecting tubular parts containing lignin and use of said method for connecting the casing sleeve and casing cover of a cartridge Download PDF

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Publication number
WO2009018899A1
WO2009018899A1 PCT/EP2008/005797 EP2008005797W WO2009018899A1 WO 2009018899 A1 WO2009018899 A1 WO 2009018899A1 EP 2008005797 W EP2008005797 W EP 2008005797W WO 2009018899 A1 WO2009018899 A1 WO 2009018899A1
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WO
WIPO (PCT)
Prior art keywords
tubular parts
lignin
sleeve
parts
cartridge
Prior art date
Application number
PCT/EP2008/005797
Other languages
German (de)
French (fr)
Inventor
Christian Baumann
Holger Brase
Thomas Heitmann
Original Assignee
Rheinmetall Waffe Munition Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Rheinmetall Waffe Munition Gmbh filed Critical Rheinmetall Waffe Munition Gmbh
Publication of WO2009018899A1 publication Critical patent/WO2009018899A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/188—Manufacturing processes therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/192—Cartridge cases characterised by the material of the casing wall

Definitions

  • the invention relates to a method for the frictional connection of lignin-containing tubular parts, such as wooden or cardboard existing sleeves.
  • the invention further relates to a use of the method for connecting the sleeve casing consisting of a combustible material and the sleeve cover of a cartridge consisting of an inert material.
  • the sleeve sheath which as a rule consists predominantly of nitrocellulose and cellulose fibers, is usually adhesively bonded to a sleeve cover fastened to the projectile and consisting of an inert material.
  • the invention has for its object to provide a method with the lignin-containing, tubular parts are connected to one another in a simple manner and in which it is ensured that the interconnected parts have only small length tolerances. It is also intended to disclose the use of the method of bonding the shell of a combustible material and the shell of a cartridge made of an inert material.
  • the invention is based essentially on the idea not to glue the parts to be joined together, but to connect to each other by a rotational friction welding. It is not, as usual, a thermoplastic introduced into the parts to be joined, but used in the cell fibers in addition to the cellulose still lignin.
  • the tubular parts to be joined together are therefore pressed against each other with their mutually facing end regions and rotated relative to each other, such that the frictional heat generated thereby leads to a melting of the lignin.
  • the rotational movement of the tubular parts is then terminated, the parts being pressed against each other for a predetermined holding time at which the lignin re-solidifies.
  • FIG. 1 shows schematically a cartridge before the connection of the sleeve casing with the sleeve cover attached to a projectile
  • Fig.1 denotes a large caliber cartridge.
  • the cartridge 1 comprises a consisting of a sleeve bottom 2, a sleeve casing 3 and a sleeve cover 4 propellant sleeve 5 and a sabot projectile 6.
  • the sleeve cover 4 has been connected before the assembly of the cartridge 1 with the sabot projectile 6.
  • Both the sleeve jacket 3 and the sleeve cover 4 are wedge-shaped on their mutually facing end regions 7, 8, so that they have a larger connection surface.
  • both the sleeve jacket 3 consisting of a combustible material and the sleeve cover 4 consisting of an inert material also contain lignin in addition to cellulose.
  • the sleeve bottom 2 connected to the sleeve casing 3 is firmly clamped in a first holding device, not shown, while the projectile-side part of the cartridge. 1 - -
  • this holding device is connected to a displaceable in the axial direction and rotatable about the longitudinal axis 9 of the cartridge 1 second holding device (this holding device is indicated schematically in Figure 1 by the arrows 10 and 11).
  • the second holding device is first axially displaced in the direction of the arrow 10 until the two end regions 7, 8 of the sleeve sheath 3 and the sleeve cover 4 to be joined press against each other with a predetermined contact pressure.
  • the second holding device is then rotated in the direction of the arrow 11 so that frictional heat is generated in the end regions 7, 8 to be joined together, which leads to melting of the lignin.
  • the molten lignin solidifies again during a holding time and the two parts 3, 4 to be joined are non-positively connected with each other. In this case, the contact pressure of the parts to be joined 3 and 4 is maintained against each other for a few seconds.
  • the sleeve cover is an inert material, analogous to the sleeve jacket. It is envisaged that at least 40% kraft pulp fibers are used or processed in the sleeve casing. These bleached pulp fibers have a lignin content, based on the total content of about 6%, unbleached of about 8%, which should be sufficient to be able to carry out the process.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Abstract

The invention relates to a method for the non-positive connection of tubular parts (3, 4) containing lignin, such as sleeves made of wood or cardboard. In order to connect such parts (3, 4) to one another in a simple manner and to ensure that the connected parts have only very low length tolerances, the invention proposes that the connection of the parts (3, 4) be performed with the aid of a rotary friction welding method, wherein the connection is effected by the lignin, which melts in the course of the friction welding.

Description

BESCHREIBUNG DESCRIPTION
Verfahren zum Verbinden von Lignin enthaltenden, rohrförmigen Teilen undMethod for joining lignin-containing tubular parts and
Verwendung des Verfahrens zur Verbindung des Hülsenmantels und des Hülsendeckels einer PatroneUse of the method for connecting the sleeve sheath and the sleeve cover of a cartridge
Die Erfindung betrifft ein Verfahren zum kraftschlüssigen Verbinden von Lignin enthaltenden, rohrförmigen Teilen, wie aus Holz oder Pappe bestehenden Hülsen. Die Erfindung bezieht sich ferner auf eine Verwendung des Verfahrens zur Verbindung des aus einem verbrennbaren Material bestehenden Hülsenmantels und des aus einem inerten Material bestehenden Hülsendeckels einer Patrone.The invention relates to a method for the frictional connection of lignin-containing tubular parts, such as wooden or cardboard existing sleeves. The invention further relates to a use of the method for connecting the sleeve casing consisting of a combustible material and the sleeve cover of a cartridge consisting of an inert material.
Bei großkalibriger Panzermunition mit verbrennbarem Hülsenmantel wird üblicherweise der in der Regel vorwiegend aus Nitrocellulose und Zellstofffasern bestehende Hülsenmantel mit einem an dem Geschoß befestigten und aus einem inerten Material bestehenden Hülsendeckel verklebt.In the case of large-caliber tank ammunition with a combustible sleeve sheath, the sleeve sheath, which as a rule consists predominantly of nitrocellulose and cellulose fibers, is usually adhesively bonded to a sleeve cover fastened to the projectile and consisting of an inert material.
Als nachteilig hat es sich erwiesen, dass es bei Verwendung eines Klebers aufgrund der unterschiedlichen Schichtdicken zu relativ großen Schwankungen hinsichtlich der Länge der fertigen Patronen kommt. Dieses kann dann unter anderem zu Problemen beim Laden und Entladen der Patrone führen sowie die Reproduzierbarkeit der Treffgenauigkeiten der Geschosse negativ beeinflussen. Außerdem hat sich gezeigt, dass die Festigkeiten der Klebverbindungen relativ stark schwanken, so dass es insbesondere bei Umwelttests zu Brüchen im Verbindungsbereich zwischen Hülsenmantel und Hülsendeckel kommen kann.It has proved to be disadvantageous that, when using an adhesive, due to the different layer thicknesses, relatively large variations in the length of the finished cartridges occur. This can then lead among other things to problems during loading and unloading of the cartridge and adversely affect the reproducibility of the accuracy of the projectiles. In addition, it has been shown that the strength of the adhesive joints vary relatively widely, so that it can lead to breaks in the connection area between the sleeve jacket and sleeve cover, in particular in environmental tests.
Durch im Internet abrufbare Entwicklungsarbeiten der Hochschule für Architektur, Bau und Holz HSB, Burgdorf, Biel, CH-2504 Biel, ist es bekannt, Holzteile durch lineares Reibschweißen miteinander zu verbinden. Dabei wird das im Holz vorhandene Lignin geschmolzen und benetzt die angrenzenden nicht erhitzten Holzteile. Nach dem Reibungsvorgang erstarrt dann das Lignin und es ergibt sich eine feste Verbindung zwischen den zu verbindenden Holzteilen. - -Through development work of the University of Architecture, Construction and Wood HSB, Burgdorf, Biel, CH-2504 Biel, which can be called up on the internet, it is known to connect pieces of wood by linear friction welding. The lignin present in the wood is melted and wets the adjacent unheated pieces of wood. After the friction process then solidifies the lignin and there is a firm connection between the wood parts to be joined. - -
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem Lignin enthaltende, rohrförmige Teile auf einfache Weise miteinander verbindbar sind und bei dem sichergestellt ist, dass die miteinander verbundenen Teile nur geringe Längentoleranzen aufweisen. Ferner soll die Verwendung des Verfahrens zur Verbindung des aus einem verbrennbaren Material bestehenden Hülsenmantels und des aus einem inerten Material bestehenden Hülsendeckels einer Patrone offenbart werden.The invention has for its object to provide a method with the lignin-containing, tubular parts are connected to one another in a simple manner and in which it is ensured that the interconnected parts have only small length tolerances. It is also intended to disclose the use of the method of bonding the shell of a combustible material and the shell of a cartridge made of an inert material.
Diese Aufgabe wird erfindungsgemäß hinsichtlich des Verfahrens durch die Merkmale des Anspruchs 1 gelöst. Die erfindungsgemäße Verwendung des Verfahrens wird in Anspruch 5 beansprucht. Weitere, besonders vorteilhafte Ausgestaltungen der Erfindung offenbaren die Unteransprüche.This object is achieved with respect to the method by the features of claim 1. The use of the method according to the invention is claimed in claim 5. Further, particularly advantageous embodiments of the invention disclose the dependent claims.
Die Erfindung beruht im Wesentlichen auf dem Gedanken, die zu verbindenden Teile nicht miteinander zu verkleben, sondern durch ein Rotations-Reibschweißverfahren miteinander zu verbinden. Dabei wird nicht, wie sonst üblich, ein thermoplastischer Kunststoff in die zu verbindenden Teile eingebracht, sondern das in den Zellfasern zusätzlich zu der Cellulose noch vorhandene Lignin verwendet.The invention is based essentially on the idea not to glue the parts to be joined together, but to connect to each other by a rotational friction welding. It is not, as usual, a thermoplastic introduced into the parts to be joined, but used in the cell fibers in addition to the cellulose still lignin.
Die miteinander zu verbindenden, rohrförmigen Teile werden daher mit ihren einander zugewandten Endbereichen gegeneinander gedrückt und relativ zueinander gedreht, derart, dass die dadurch erzeugte Reibungswärme zu einem Schmelzen des Lignins führt. Nach dem Schmelzen des Lignins wird dann die Drehbewegung der rohrförmigen Teile beendet, wobei die Teile während einer vorgegebenen Haltezeit, bei welcher das Lignin wieder erstarrt, gegeneinander gedrückt bleiben.The tubular parts to be joined together are therefore pressed against each other with their mutually facing end regions and rotated relative to each other, such that the frictional heat generated thereby leads to a melting of the lignin. After the lignin has melted, the rotational movement of the tubular parts is then terminated, the parts being pressed against each other for a predetermined holding time at which the lignin re-solidifies.
Der gesamte Schweißvorgang ist in wenigen Sekunden beendet. Außerdem sind die Längenschwankungen der fertigen Patronen durch den jeweils auf die zu verbindenden Teile bei dem Schweißvorgang ausgeübten konstanten Anpressdruck gering.The entire welding process is completed in a few seconds. In addition, the length variations of the finished cartridges by the respectively applied to the parts to be joined during the welding process constant contact pressure low.
Da bei dem Reibschweißvorgang in den Verbindungsbereichen Temperaturen bis etwa 200 0C auftreten können, ist darauf zu achten, dass der Zeitraum während der das Schmelzen des Lignins erfolgt und das Material der rohrförmigen Teile derart aufeinander abgestimmt werden, dass ein Entzünden des Materials der rohrförmigen Teile sicher vermieden wird. Es kann daher vorteilhaft sein, wenn die zu verbindenden Teile im Verbindungsbereich spezielle Zonen aufweisen, in denen die Entzündbarkeit herabgesetzt ist. - -Since in the friction welding in the connecting regions temperatures up to about 200 0 C may occur, it should be ensured that the period during which the melting of the lignin takes place and the material of the tubular parts are coordinated so that igniting the material of the tubular parts safely avoided. It may therefore be advantageous if the parts to be joined in the connection region have special zones in which the flammability is reduced. - -
Dieses kann beispielsweise bei einem Verbinden einer verbrennbaren Hülse mit einem inerten Hülsendeckel einer Patrone dadurch erfolgen, dass der Verbindungsbereich der verbrennbaren Hülse ebenfalls inert ausgebildet ist.This can be done, for example, when connecting a combustible sleeve with an inert sleeve cover of a cartridge in that the connecting region of the combustible sleeve is also designed to be inert.
Um einen größeren Verbindungsbereich zu erhalten, hat es sich als vorteilhaft erwiesen, wenn die miteinander zu verbindenden Endbereiche der rohrförmigen Teile keilförmig ausgebildet sind. Selbstverständlich kann aber die Form der Schweißverbindung auch als Stumpfstoß ausgeführt sein.In order to obtain a larger connection area, it has proved to be advantageous if the end regions of the tubular parts to be joined together are wedge-shaped. Of course, however, the shape of the welded connection can also be designed as a butt joint.
Als zweckmäßig hat es sich ferner erwiesen, wenn die miteinander zu verbindenden Endbereiche der rohrförmigen Teile aus dem gleichen Material bestehen.It has also proven to be useful if the end regions of the tubular parts to be joined together consist of the same material.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den folgenden, anhand von Figuren erläuterten Ausführungsbeispielen. Es zeigen:Further details and advantages of the invention will become apparent from the following, with reference to figures explained embodiments. Show it:
Fig.1 schematisch eine Patrone vor der Verbindung des Hülsenmantels mit dem an einem Geschoß befestigten Hülsendeckel und1 shows schematically a cartridge before the connection of the sleeve casing with the sleeve cover attached to a projectile and
Fig.2 eine vergrößerte Ansicht der Verbindungsbereiche von Hülsendeckel und Hülsenmantel.An enlarged view of the connecting portions of sleeve cover and sleeve jacket.
In Fig.1 ist mit 1 eine großkalibrige Patrone bezeichnet. Die Patrone 1 umfasst eine aus einem Hülsenboden 2, einem Hülsenmantel 3 sowie einem Hülsendeckel 4 bestehende Treibladungshülse 5 und ein Treibkäfiggeschoß 6. Dabei ist der Hülsendeckel 4 bereits vor der Montage der Patrone 1 mit dem Treibkäfiggeschoß 6 verbunden worden. Sowohl der Hülsenmantel 3 als auch der Hülsendeckel 4 sind auf ihren einander zugewandten Endbereichen 7, 8 keilförmig ausgebildet, so dass sie eine größere Verbindungsfläche aufweisen.In Fig.1, 1 denotes a large caliber cartridge. The cartridge 1 comprises a consisting of a sleeve bottom 2, a sleeve casing 3 and a sleeve cover 4 propellant sleeve 5 and a sabot projectile 6. In this case, the sleeve cover 4 has been connected before the assembly of the cartridge 1 with the sabot projectile 6. Both the sleeve jacket 3 and the sleeve cover 4 are wedge-shaped on their mutually facing end regions 7, 8, so that they have a larger connection surface.
Außerdem enthalten sowohl der aus einem verbrennbaren Material bestehende Hülsenmantel 3 als auch der aus einem inerten Material bestehende Hülsendeckel 4 neben CeI- lulose auch Lignin.In addition, both the sleeve jacket 3 consisting of a combustible material and the sleeve cover 4 consisting of an inert material also contain lignin in addition to cellulose.
Der mit dem Hülsenmantel 3 verbundene Hülsenboden 2 ist fest in einer nicht dargestellten ersten Haltevorrichtung eingespannt, während der geschoßseitige Teil der Patrone 1 - -The sleeve bottom 2 connected to the sleeve casing 3 is firmly clamped in a first holding device, not shown, while the projectile-side part of the cartridge. 1 - -
mit einer in axialer Richtung verschiebbaren und um die Längsachse 9 der Patrone 1 drehbaren zweiten Halteeinrichtung verbunden ist (diese Halteeinrichtung wird in Fig.1 schematisch durch die Pfeile 10 und 11 angedeutet).is connected to a displaceable in the axial direction and rotatable about the longitudinal axis 9 of the cartridge 1 second holding device (this holding device is indicated schematically in Figure 1 by the arrows 10 and 11).
Zur Verbindung des Hülsendeckels 4 mit dem Hülsenmantel 3 wird zunächst die zweite Halteeinrichtung so lange in Richtung des Pfeils 10 axial verschoben, bis die beiden zu verbindenden Endbereiche 7, 8 des Hülsenmantels 3 und des Hülsendeckels 4 mit einem vorgegebenen Anpressdruck gegeneinander drücken.To connect the sleeve cover 4 with the sleeve casing 3, the second holding device is first axially displaced in the direction of the arrow 10 until the two end regions 7, 8 of the sleeve sheath 3 and the sleeve cover 4 to be joined press against each other with a predetermined contact pressure.
Anschließend wird dann die zweite Halteeinrichtung in Richtung des Pfeils 11 gedreht, so dass in den miteinander zu verbindenden Endbereichen 7, 8 Reibungswärme erzeugt wird, welche zu einem Schmelzen des Lignins führt. Nach dem Reibungsvorgang erstarrt das geschmolzene Lignin während einer Haltezeit wieder und die beiden zu verbindenden Teile 3, 4 sind kraftschlüssig miteinander verbunden. Dabei wird während einiger Sekunden der Anpressdruck der zu verbindenden Teile 3 und 4 gegeneinander aufrechterhalten.Subsequently, the second holding device is then rotated in the direction of the arrow 11 so that frictional heat is generated in the end regions 7, 8 to be joined together, which leads to melting of the lignin. After the friction process, the molten lignin solidifies again during a holding time and the two parts 3, 4 to be joined are non-positively connected with each other. In this case, the contact pressure of the parts to be joined 3 and 4 is maintained against each other for a few seconds.
Fig.2 zeigt noch einmal die miteinander verbundenen Endbereiche 7, 8 des Hülsenmantels 3 und des Hülsendeckels 4, wobei der Endbereich 7 des Hülsenmantels 3 in diesem Fall ebenfalls aus einem inerten Material besteht, um sicherzustellen, dass bei dem Reibschweißvorgang keine Entzündung des ansonsten verbrennbaren Hülsenmantels 3 erfolgt.2 again shows the interconnected end regions 7, 8 of the sleeve sheath 3 and the sleeve cover 4, wherein the end portion 7 of the sleeve sheath 3 in this case also consists of an inert material, to ensure that in the friction welding process no inflammation of the otherwise combustible Sleeve sheath 3 takes place.
Beim Hülsendeckel handelt es sich um ein inertes Material, analog zum Hülsenmantel. Vorgesehen ist, dass in dem Hülsenmantel wenigstens 40% Kraftzellstofffasern eingesetzt bzw. verarbeitet sind. Diese gebleichten Zellstofffasern haben dabei einen Ligninan- teil, bezogen auf den Gesamtanteil von ca. 6%, ungebleichte von ca. 8%, was ausreichend sein soll, dass das Verfahren durchführen zu können.The sleeve cover is an inert material, analogous to the sleeve jacket. It is envisaged that at least 40% kraft pulp fibers are used or processed in the sleeve casing. These bleached pulp fibers have a lignin content, based on the total content of about 6%, unbleached of about 8%, which should be sufficient to be able to carry out the process.
Die Erfindung ist selbstverständlich nicht auf die vorstehend beschriebenen Ausführungsbeispiele beschränkt. So können außer Munitionsteile auch andere, Lignin enthaltende, rohrförmige Teile auf einfache Weise miteinander verbunden werden. ~ O —The invention is of course not limited to the embodiments described above. Thus, in addition to ammunition parts, other lignin-containing tubular parts can be connected to one another in a simple manner. ~ O -
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Patrone1 cartridge
2 Hülsenboden2 sleeve bottom
3 Hülsenmantel, Teil3 sleeve jacket, part
4 Hülsendeckel, Teil4 sleeve caps, part
5 Treibladungshülse5 propellant charge case
6 Treibkäfiggeschoß6 sabot projectile
7 Endbereich (Hülsenmantel)7 end area (sleeve jacket)
8 Endbereich (Hülsendeckel8 end area (sleeve cover
9 Längsachse9 longitudinal axis
10,11 Pfeile 10.11 arrows

Claims

PATENTANSPRÜCHE
1. Verfahren zum kraftschlüssigen Verbinden von Lignin enthaltenden, rohrförmigen Teilen (3, 4), wie aus Holz oder Pappe bestehenden Hülsen, dadurch gekennzeichnet, dass die miteinander zu verbindenden, rohrförmigen Teile (3, 4) mit ihren einander zugewandten Endbereichen (7, 8) gegeneinander gedrückt und relativ zueinander gedreht werden, derart, dass die dadurch erzeugte Reibungswärme zu einem Schmelzen des Lignins führt, dass nach dem Schmelzen des Lignins die Drehbewegung der rohrförmigen Teile (3, 4) relativ zueinander beendet wird und dass die Teile (3, 4) während einer vorgegebenen Haltezeit, bei welcher das Lignin wieder erstarrt, gegeneinander gedrückt bleiben.1. A method for the frictional connection of lignin-containing tubular parts (3, 4), such as wooden or cardboard existing sleeves, characterized in that the interconnected, tubular parts (3, 4) with their mutually facing end portions (7, 8) are pressed against each other and rotated relative to each other, such that the frictional heat generated thereby leads to a melting of the lignin, that after the melting of the lignin, the rotational movement of the tubular parts (3, 4) is terminated relative to each other and that the parts (3 , 4) remain pressed against each other during a predetermined holding time at which the lignin solidifies again.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Zeitraum während der das Schmelzen des Lignins erfolgt und das Material der rohrförmigen Teile (3, 4) derart aufeinander abgestimmt werden, dass ein Entzünden des Materials der rohrförmigen Teile (3, 4) sicher vermieden wird.2. The method according to claim 1, characterized in that the period during which the melting of the lignin takes place and the material of the tubular parts (3, 4) are coordinated such that ignition of the material of the tubular parts (3, 4) safely is avoided.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die miteinander zu verbindenden Endbereiche (7, 8) der rohrförmigen Teile (3, 4) jeweils einen keilförmigen Verbindungsbereich aufweisen.3. The method according to claim 1 or 2, characterized in that to be joined together end portions (7, 8) of the tubular parts (3, 4) each have a wedge-shaped connection region.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die miteinander zu verbindenden Endbereiche (7, 8) der rohrförmigen Teile (3, 4) aus dem gleichen Material bestehen.4. The method according to any one of claims 1 to 3, characterized in that the end regions (7, 8) to be joined together of the tubular parts (3, 4) consist of the same material.
5. Verwendung des Verfahrens nach einem der Ansprüche 1 bis 4 zur Verbindung des aus einem verbrennbaren Material bestehenden Hülsenmantels und des aus einem inerten Material bestehenden Hülsendeckels einer Patrone. 5. Use of the method according to any one of claims 1 to 4 for connecting the existing of a combustible material sleeve sheath and the existing of an inert material sleeve cover of a cartridge.
PCT/EP2008/005797 2007-08-09 2008-07-16 Method for connecting tubular parts containing lignin and use of said method for connecting the casing sleeve and casing cover of a cartridge WO2009018899A1 (en)

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DE102007037741.1 2007-08-09
DE200710037741 DE102007037741B4 (en) 2007-08-09 2007-08-09 A method for connecting a tubular sleeve sheath and a sleeve cover of a cartridge

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Publication number Priority date Publication date Assignee Title
WO2021165109A1 (en) * 2020-02-19 2021-08-26 Nitrochemie Aschau Gmbh Case jacket
US11898833B2 (en) 2020-02-19 2024-02-13 Nitrochemie Aschau Gmbh Case jacket

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