EP0306615B1 - Procédé de fabrication de projectiles à sabot - Google Patents

Procédé de fabrication de projectiles à sabot Download PDF

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Publication number
EP0306615B1
EP0306615B1 EP88107212A EP88107212A EP0306615B1 EP 0306615 B1 EP0306615 B1 EP 0306615B1 EP 88107212 A EP88107212 A EP 88107212A EP 88107212 A EP88107212 A EP 88107212A EP 0306615 B1 EP0306615 B1 EP 0306615B1
Authority
EP
European Patent Office
Prior art keywords
sabot
projectile
sealing
annular gap
projectile body
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP88107212A
Other languages
German (de)
English (en)
Other versions
EP0306615A1 (fr
Inventor
Helmut Ortmann
Rolf Scharnhorst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall 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.)
Filing date
Publication date
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Priority to AT88107212T priority Critical patent/ATE91343T1/de
Publication of EP0306615A1 publication Critical patent/EP0306615A1/fr
Application granted granted Critical
Publication of EP0306615B1 publication Critical patent/EP0306615B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/067—Sealing aspects in sabots, e.g. sealing between individual segments of the sabots or sealing between the outer surface of the sabot and the inner surface of the barrel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49876—Assembling or joining with prestressing of part by snap fit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49888—Subsequently coating

Definitions

  • the invention relates to a method for producing a sabot projectile according to the preamble of main claim 1.
  • a sub-caliber wing-stabilized sabot projectile in which the sabot has a sealing covering made of vulcanized-on rubber or rubber applied to the rear gas pressure-receiving surface.
  • the sabot projectile is placed in a vulcanization tool with an appropriate injection mold.
  • the injection mold leaves a thin circular disk-shaped cavity on the rear gas pressure receiving surface of the sabot for the heated sealing material injected in liquid form and seals the sabot on its rear outer circumference and the projectile body over its circumference at a corresponding distance (e.g. 3 up to 8 mm) from the rear gas pressure receiving surface of the sabot.
  • the sealing covering fixes the sabot segments in their rear area and seals the joints of the sabot segments against the gas pressure of the propellant gases.
  • the liquid sealing compound is usually injected into the injection mold at a high pressure of, for example, 1000 to 1500 bar via a laterally arranged filling opening. After that, the sabot remains at Vulcanization, ie to solidify the rubber mass, for a period of about 10 to 15 minutes at a corresponding temperature of, for example, 150 ° C. in the injection mold or in the vulcanization tool.
  • the liquid material may have penetrated irregularly depending on the gap width and injection pressure, this can result in adverse effects in terms of dimensional accuracy and in detaching the sabot segments from the projectile body after firing or after leaving the weapon barrel muzzle; this leads to an uneven detachment of the sabot segments and to a reduction in the quality of the image.
  • a sabot projectile is already known, in which a sealing ring between sabot and projectile body is used.
  • This sealing ring is inserted in the rear area of the sabot in an inner circumferential annular groove in the sabot segments and is used exclusively for gas sealing between sabot segments and the body circumference.
  • the gas sealing of the sabot segments with one another takes place via elongated sealing elements which are inserted into corresponding grooves arranged in the butt joints or parting planes between the individual sabot segments.
  • a uniform sealing coating sprayed or vulcanized onto the rear gas pressure receiving surface of the sabot in a special injection mold is not available here, so that the problems and the solution features of the present invention cannot be suggested by this known sabot projectile.
  • the sealing ring By sealing the inner gap between the circumference of the projectile body and the rear gas pressure receiving surface of the sabot (inner bore for receiving the projectile body) by means of a simple sealing ring, the penetration of liquid soft rubber or silicone rubber when the sealing material is injected or at the high vulcanization pressure of around 1500 becomes very advantageous bar prevented with certainty.
  • an inexpensive way to seal the gap 100 percent without design changes to the sabot, projectile body or spray chamber is specified. This is not a disadvantage Tensioning of the sabot and projectile body more possible.
  • the sealing ring very advantageously combines with the injected sealing material to form a unit.
  • the reference number 10 in Fig. 1 shows a sabot projectile with a balancing projectile body 11 of high slenderness and a sabot 12, for example in caliber 105 mm or 120 mm.
  • a wing or perforated cone tail unit is usually attached to stabilize the wing.
  • the sabot is positively via a positive-locking zone 14, for example, a thread toothing with the balancing projectile body 11, which as a training projectile z. B. made of steel or as a missile z. B. consists of tungsten material connected.
  • the sabot 12 To hold the individual sabot segments together and to seal the gas pressure against the inner tube wall of a tube weapon, the sabot 12 has a retaining band 15 in the front area of its peripheral surface and a guide band 16 in the rear area.
  • a uniform sealing coating 19 is vulcanized to seal the joints between the sabot segments and the annular gap around the circumference of the projectile body 11 against the gas pressure of the propellant gases.
  • an annular bead 21 (rolling edge) is provided on the circumference of the projectile body 11 directly behind the positive-locking zone 14.
  • FIG. 2 shows the arrangement of a sealing ring 22 on the circumference of the projectile body 11 directly on or in front of the rear gas pressure-receiving surface 18 of the sabot 12.
  • This sealing ring 22 prevents the penetration of liquid silicone rubber into the cylindrical annular gap 20 between the sabot and projectile body surface in the injection mold or in the vulcanization tool.
  • the sealing ring 22 which consists of the same material as the rubber coating 19, is covered by the sealing compound and subsequently vulcanized into the latter.
  • the sealing ring 22 preferably has a circular cross section, since this results in the best fit in the circumferential joint 23 in front of the annular gap 20 and has a 20 to 30%, preferably 25% smaller free inner diameter than the respective projectile body diameter.
  • the sealing ring can also have a suitable other cross section (square, oval, triangular).
  • the sealing covering 19 and the sealing ring 22 tear along the parting planes (parting lines) of the sabot segments and the sealing covering 19 from the peripheral surface of the projectile body.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Of Engines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Fats And Perfumes (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (3)

  1. Procédé de fabrication d'un projectile à sabot, dans lequel les segments de sabot sont fixés sur le corps de projectile à l'aide de moyens de maintien et fixés sur une zone à ajustement de forme dans leur position la plus arrière prévue, et pour assurer la fixation et l'étanchéité des différents segments de sabot les uns contre les autres, une couche mince unitaire en caoutchouc, ou en gomme est surmoulée par injection et vulcanisée sur la surface arrière, supportant la pression des gaz, du sabot, dans un outil de vulcanisation avec un moule d'injection, on caractérisé en ce qu'avant introduction du projectile à sabot dans l'outil de vulcanisation, ou bien avant le processus de surmoulage par injection et de vulcanisation, l'interstice annulaire intérieur (20) arrière, entre sabot (12) et corps de projectile (11), est isole de façon étanche par application d'un élément d'étanchéité (22), non vulcanisé et composé du même matériau que le revêtement en caoutchouc (19), sur le joint périphérique (23), devant l'interstice annulaire intérieur (20) du corps de projectile (11), sur la surface arrière (18), supportant la pression des gaz, de telle sorte qu'il n'y ait pas de caoutchouc dans l'interstice annulaire intérieur (20).
  2. Procédé selon la revendication 1, caractérisé en ce que l'élément d'étanchéité (22) est une bague d'étanchéité (22) présentant de préférence une section transversale circulaire.
  3. Procédé selon la revendication 2, caractérisé en ce que la bague d'étanchéité (22) présente un diamètre libre inférieur de 20 à 30 %, de préférence de 25 %, au diamètre du corps de projectile.
EP88107212A 1987-09-10 1988-05-05 Procédé de fabrication de projectiles à sabot Expired - Lifetime EP0306615B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107212T ATE91343T1 (de) 1987-09-10 1988-05-05 Verfahren zur herstellung von treibkaefiggeschossen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730370 1987-09-10
DE19873730370 DE3730370A1 (de) 1987-09-10 1987-09-10 Verfahren zur herstellung von treibkaefiggeschossen

Publications (2)

Publication Number Publication Date
EP0306615A1 EP0306615A1 (fr) 1989-03-15
EP0306615B1 true EP0306615B1 (fr) 1993-07-07

Family

ID=6335683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107212A Expired - Lifetime EP0306615B1 (fr) 1987-09-10 1988-05-05 Procédé de fabrication de projectiles à sabot

Country Status (5)

Country Link
US (1) US4941244A (fr)
EP (1) EP0306615B1 (fr)
AT (1) ATE91343T1 (fr)
DE (2) DE3730370A1 (fr)
IL (1) IL87284A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661739A1 (fr) * 1990-05-04 1991-11-08 Giat Ind Sa Dispositif d'etancheite d'un projectile fleche.
US5227580A (en) * 1990-05-04 1993-07-13 Giat Industries Sealing device for an arrow projectile
DE4028410C2 (de) * 1990-09-07 1995-09-07 Rheinmetall Ind Gmbh Verfahren zum Umarbeiten unterkalibriger Wuchtgeschosse
US5639985A (en) * 1996-09-04 1997-06-17 The United States Of America As Represented By The Secretary Of The Army Groove drag mitigation
USH1999H1 (en) * 1999-03-03 2001-11-06 The United States Of America As Represented By The Secretary Of The Army Tuning saboted projectile performance through bourrelet modification
WO2003036222A1 (fr) * 2001-10-22 2003-05-01 Armtec Defense Products Co. Ensemble circulaire a munitions comportant une douille combustible
US7363861B2 (en) * 2004-08-13 2008-04-29 Armtec Defense Products Co. Pyrotechnic systems and associated methods
US8146502B2 (en) 2006-01-06 2012-04-03 Armtec Defense Products Co. Combustible cartridge cased ammunition assembly
US20100274544A1 (en) * 2006-03-08 2010-10-28 Armtec Defense Products Co. Squib simulator
US7913625B2 (en) * 2006-04-07 2011-03-29 Armtec Defense Products Co. Ammunition assembly with alternate load path
US10632265B2 (en) 2014-06-20 2020-04-28 Medspray B.V. Aerosol or spray device, spray nozzle unit and method of manufacturing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703507A1 (de) * 1968-05-31 1972-03-09 Rheinmetall Gmbh Treibkaefig fuer fluegelstabilisierte Unterkalibergeschosse

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US265A (en) * 1837-07-11 Machinery for molding candles
US3518339A (en) * 1965-08-18 1970-06-30 Us Navy Method for cushioning and sealing
CH632086A5 (de) * 1978-08-08 1982-09-15 Oerlikon Buehrle Ag Verfahren zur herstellung eines treibspiegelgeschosses und nach dem verfahren hergestelltes treibspiegelgeschoss.
DE2836963A1 (de) * 1978-08-24 1984-03-08 Rheinmetall GmbH, 4000 Düsseldorf Munition-einheit fuer rohrwaffen
US4284008A (en) * 1979-04-12 1981-08-18 The United States Of America As Represented By The Secretary Of The Army Double ramp discarding sabot
DE3037662A1 (de) * 1980-10-04 1982-05-13 Rheinmetall GmbH, 4000 Düsseldorf Patronierte munition
US4444113A (en) * 1981-04-06 1984-04-24 The United States Of America As Represented By The Secretary Of The Army High-pressure self-sealing obturator in sabot discard projectile
US4467724A (en) * 1982-08-30 1984-08-28 Olin Corporation Sabot projectile core restraint
US4459894A (en) * 1982-09-13 1984-07-17 Olin Corporation Mold-in-place sabot projectile
DE3332023A1 (de) * 1983-09-06 1985-03-21 Helmut Dipl.-Phys. 5529 Bauler Nußbaum Treibspiegel fuer unterkalibrige geschosse
DE3332675C2 (de) * 1983-09-10 1986-10-02 Rheinmetall GmbH, 4000 Düsseldorf Heckseitige Dichtscheibe aus elastischem Material für einen Treibkäfig
US4735148A (en) * 1986-03-18 1988-04-05 United Technologies Corporation Plastic composite sabot
US4815682A (en) * 1987-07-20 1989-03-28 Pacific Armatechnica Corporation Fin-stabilized subcaliber projectile and method of spin tuning
US4802415A (en) * 1987-12-28 1989-02-07 Ford Aerospace Corporation Telescoped ammunition round having subcaliber projectile sabot with integral piston

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703507A1 (de) * 1968-05-31 1972-03-09 Rheinmetall Gmbh Treibkaefig fuer fluegelstabilisierte Unterkalibergeschosse

Also Published As

Publication number Publication date
ATE91343T1 (de) 1993-07-15
IL87284A0 (en) 1989-01-31
US4941244A (en) 1990-07-17
DE3882184D1 (de) 1993-08-12
EP0306615A1 (fr) 1989-03-15
IL87284A (en) 1992-08-18
DE3730370A1 (de) 1989-03-23

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