CH390766A - Device for the continuous production of gunpowder and propellants - Google Patents

Device for the continuous production of gunpowder and propellants

Info

Publication number
CH390766A
CH390766A CH6551958A CH6551958A CH390766A CH 390766 A CH390766 A CH 390766A CH 6551958 A CH6551958 A CH 6551958A CH 6551958 A CH6551958 A CH 6551958A CH 390766 A CH390766 A CH 390766A
Authority
CH
Switzerland
Prior art keywords
screw
nozzle
gunpowder
powder
continuous production
Prior art date
Application number
CH6551958A
Other languages
German (de)
Inventor
Orville Dr Dafert
Original Assignee
Dynamit Nobel Ag
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.)
Filing date
Publication date
Priority claimed from DED26179A external-priority patent/DE1048212B/en
Application filed by Dynamit Nobel Ag filed Critical Dynamit Nobel Ag
Publication of CH390766A publication Critical patent/CH390766A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0033—Shaping the mixture
    • C06B21/0075—Shaping the mixture by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Nozzles (AREA)

Description

  

  <B>Zusatzpatent zum Hauptpatent</B> Nr.<B>372 581</B>    Vorrichtung zur kontinuierlichen Herstellung von Schiesspulvern und Treibsätzen    Im Hauptpatent Nr. 372581 ist ein Verfahren  und eine Vorrichtung zur     kontinuierlichen    Herstel  lung von Schiesspulvern und Treibsätzen beschrie  ben, bei dem in einer     kombinierten        Schneckenpres-          sen-Vorrichtung,    die vollkommen abgeschlossen ist,  Pulvermassen aus der     Formgebungsschnecke    aus  treten und anschliessend hinter dem Mundstück die  ser     Formgebungsschnecke    mittels einer Schneide  vorrichtung das gepresste Pulver in die für den spe  ziellen Zweck gewünschte Form gebracht wird.

   Die  Grösse des zu pressenden Pulverstranges ist dabei  massgeblich bestimmt durch den Durchmesser der  Schneckenspindel der     Formgebungsschnecke.    Wird  als     Formgebungsschnecke    eine Doppelschnecken  presse verwendet, bei der der     Spindeldurchmesser     z. B. 70 mm beträgt, so wird ein Pulverstrang     erbal-          ten,    der nur 50 mm Durchmesser besitzt.  



  Um mit einer solchen Vorrichtung ohne     Vergrös-          serung    der Dimensionen der     Spindelschnecke    auch  Pulverstränge grösseren Durchmessers pressen zu  können, wird in weiterer Ausbildung der Erfindung  vorgeschlagen, an das austrittsseitige Ende der Form  gebungsschnecke eine Düse anzusetzen, welche Düse  zwischen dem Mundstück der     Formgebungsschnecke     und der Schneidevorrichtung angeordnet ist und de  ren lichter Querschnitt grösser ist als der Austritts  querschnitt der     Formgebungsschnecke    und die mit  einer abnehmbaren Bremsplatte mit     Radialschlitzen     abgeschlossen ist.

   Diese Schlitze lassen die den Pul  verstrang umgebende Luft beim Anfüllen der Düse  entweichen, wobei man noch kurze Zeit auch Pulver  massen austreten lässt. Hierdurch bleibt die Pulver  masse im Fliessen, und man erhält einen form  gerechten und     lunkerfreien    Pulverkörper. Bei konti  nuierlicher Verarbeitung und Herstellung lunker-    freier Pulverkörper wird die Bremsplatte abgenom  men und somit ein der grösseren Düsenöffnung ent  sprechender     lunkerfreier    Strang weiter ausgepresst,  da die Wandreibung den nötigen Widerstand zur  Füllung der Düse bewirkt. Auf diese Art lassen sich  beispielsweise mit einer 70 mm     Spindelschnecke    Pul  verstränge bis zu 100 mm und mehr herstellen.  



  Die Länge der Düse kann bis zum Mehrviel  fachen ihrer Querschnittabmessungen betragen.  



       Fig.    1 zeigt eine Ausführung der     erfindungs-          gemässen    Vorrichtung. Von der     Formgebungs-          schnecke    1     gelangt    die Pulvermasse in die erwei  terte und verlängerte Düse 2. Diese Düse ist zwi  schen dem Mundstück der     Formgebungsschnecke     und der Schneidevorrichtung     angeordnet.    Zur     Behei-          zung    dieser Düse 2 ist diese mit einem     Heisswasser-          mantel    3 versehen. Am Düsenaustritt befindet sich  die Bremsplatte 4 mit Nuten.  



       Fig.    2 zeigt die Bremsplatte 4 im Schnitt.



  <B> Additional patent to the main patent </B> No. <B> 372 581 </B> Device for the continuous production of gunpowder and propellants In the main patent no. 372581 a method and a device for the continuous production of gunpowder and propellants is described , in which in a combined screw press device, which is completely closed, powder masses emerge from the shaping screw and then behind the mouthpiece of this shaping screw the pressed powder is brought into the shape required for the special purpose by means of a cutting device.

   The size of the powder strand to be pressed is largely determined by the diameter of the screw spindle of the shaping screw. If a twin screw press is used as the shaping screw, in which the spindle diameter z. If, for example, it is 70 mm, a strand of powder is obtained which is only 50 mm in diameter.



  In order to be able to press powder strands of larger diameter with such a device without increasing the dimensions of the screw screw, it is proposed in a further embodiment of the invention to attach a nozzle to the outlet end of the forming screw, which nozzle is between the mouthpiece of the forming screw and the cutting device is arranged and de Ren clear cross section is larger than the exit cross section of the shaping screw and which is completed with a removable brake plate with radial slots.

   These slots allow the air surrounding the powder strand to escape when the nozzle is being filled, and powder masses can also escape for a short time. As a result, the powder remains flowing, and a powder body that is true to shape and free of voids is obtained. With continuous processing and manufacture of void-free powder bodies, the brake plate is removed and a void-free strand corresponding to the larger nozzle opening is pressed out further, since the wall friction creates the necessary resistance for filling the nozzle. In this way, powder strands of up to 100 mm and more can be produced with a 70 mm spindle screw, for example.



  The length of the nozzle can be up to Mehrviel times its cross-sectional dimensions.



       1 shows an embodiment of the device according to the invention. From the shaping screw 1, the powder mass passes into the expanded and lengthened nozzle 2. This nozzle is arranged between the mouthpiece of the shaping screw and the cutting device. To heat this nozzle 2, it is provided with a hot water jacket 3. The brake plate 4 with grooves is located at the nozzle outlet.



       Fig. 2 shows the brake plate 4 in section.

Claims (1)

PATENTANSPRUCH Vorrichtung zur kontinuierlichen Herstellung von Schiesspulvern und Treibsätzen nach Patentanspruch 11 des Hauptpatentes, dadurch gekennzeichnet, dass an die Formgebungsschnecke eine Düse angesetzt ist, deren lichter Querschnitt grösser ist als der Aus trittsquerschnitt der Formgebungsschnecke, welche Düse zwischen dem Mundstück der Formgebungs- schnecke und der Schneidevorrichtung angeordnet ist und mit einer mit Radialschlitzen versehenen ab nehmbaren Bremsplatte abgeschlossen ist. PATENT CLAIM Device for the continuous production of gunpowder and propellants according to claim 11 of the main patent, characterized in that a nozzle is attached to the shaping screw, the clear cross-section of which is larger than the exit cross-section of the shaping screw, which nozzle is between the mouthpiece of the shaping screw and the Cutting device is arranged and is completed with a radial slots from removable brake plate.
CH6551958A 1957-08-09 1958-10-28 Device for the continuous production of gunpowder and propellants CH390766A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DED26179A DE1048212B (en) 1957-08-09 1957-08-09 Device for the continuous production of gunpowder and propellants
DED27754A DE1060761B (en) 1957-08-09 1958-03-28 Device for the continuous production of gunpowder and propellants

Publications (1)

Publication Number Publication Date
CH390766A true CH390766A (en) 1965-04-15

Family

ID=25970817

Family Applications (1)

Application Number Title Priority Date Filing Date
CH6551958A CH390766A (en) 1957-08-09 1958-10-28 Device for the continuous production of gunpowder and propellants

Country Status (4)

Country Link
AT (1) AT224522B (en)
CH (1) CH390766A (en)
DE (1) DE1060761B (en)
FR (1) FR74394E (en)

Also Published As

Publication number Publication date
FR74394E (en) 1960-11-07
DE1060761B (en) 1959-07-02
AT224522B (en) 1962-11-26

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