DE3938230A1 - Radome cover esp. for missile - Google Patents

Radome cover esp. for missile

Info

Publication number
DE3938230A1
DE3938230A1 DE19893938230 DE3938230A DE3938230A1 DE 3938230 A1 DE3938230 A1 DE 3938230A1 DE 19893938230 DE19893938230 DE 19893938230 DE 3938230 A DE3938230 A DE 3938230A DE 3938230 A1 DE3938230 A1 DE 3938230A1
Authority
DE
Germany
Prior art keywords
radome
radome according
core
layers
cover layers
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.)
Withdrawn
Application number
DE19893938230
Other languages
German (de)
Inventor
Dieter Dipl Ing Ruesch
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.)
Telefunken Systemtechnik AG
Original Assignee
Telefunken Systemtechnik 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
Application filed by Telefunken Systemtechnik AG filed Critical Telefunken Systemtechnik AG
Priority to DE19893938230 priority Critical patent/DE3938230A1/en
Priority to FR8916026A priority patent/FR2640738A1/en
Priority to GB8927529A priority patent/GB2228142B/en
Publication of DE3938230A1 publication Critical patent/DE3938230A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/38—Range-increasing arrangements
    • F42B10/42—Streamlined projectiles
    • F42B10/46—Streamlined nose cones; Windshields; Radomes

Abstract

A a cover, esp. for a missile, consists of an inner plastic core layer (1) which is sandwiched between thin inner and outer layers (2,3). The inner core is made from a tufted polyimide felt, while the inner and outer layers are made from plastic or polymers resistant to high temps., such as a thermally hardening polyimide matrix based on maleinimide resin with fibre reinforcement. The three layers are joined solidly together without the aid of an external adhesive, e.g. by compression at high

Description

Die Erfindung betrifft ein Radom gemäß dem Oberbegriff von Anspruch 1.The invention relates to a radome according to the preamble of Claim 1.

Derartige Radome sind allgemein bekannt und weisen bei­ spielsweise als Kern ein Syntaktikmaterial auf. Nachteilig hierbei ist, daß bei hohen Temperaturbelastungen das Kern­ material rißanfällig ist, da das Kernmaterial infolge eines verhältnismäßig hohen thermischen Ausdehnungskoeffizienten und durch Materialeigenschaften eine schlechte Schubfestig­ keit zu den Decklagen hat.Such radomes are generally known and demonstrate for example, a syntactic material as the core. Disadvantageous here is that the core at high temperature loads material is prone to cracking because the core material is the result of a relatively high coefficient of thermal expansion and poor shear strength due to material properties to the top layers.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Radom der eingangs genannten Art zu schaffen, dessen mechanische, thermische und dielektrische Eigenschaften für einen dauer­ haften Hochtemperatureinsatz beispielsweise bis zu 320°C geeignet sind. The invention is therefore based on the object of a radome to create of the type mentioned, its mechanical, thermal and dielectric properties for a long time can withstand high temperatures up to 320 ° C are suitable.  

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.The object is achieved by the characterizing Features of claim 1 solved.

Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.Embodiments of the invention are in the subclaims described.

Das erfindungsgemäße Radom bringt den Vorteil mit sich, daß eine Verklebung von Decklagen zum Kern fortfällt. Der Kern aus Polyimid-Nadelfilz wird mittels Temperatur und Druck so verdichtet, daß vorteilhafterweise ein sphärisch verformtes Material hoher Steifigkeit und geringen Gewich­ tes mit guten dielektrischen Eigenschaften entsteht. Von Vorteil ist auch, daß sich mit dem Kernmaterial Polyimid- Nadelfilz richtungsabhängige mechanische Eigenschaften, wie z. B. Härte, Elastizität und Festigkeit, sowie eine niedri­ ge Dielektrizitätskonstante ε, ein niedriger Verlustwin­ kel tgδ und eine hohe Steifigkeit erreichen lassen.The radome according to the invention has the advantage that there is no gluing of the top layers to the core. The Polyimide needle felt core is made by means of temperature and Compressed pressure so that advantageously a spherical deformed material with high rigidity and low weight tes with good dielectric properties. From Another advantage is that the core material polyimide Needle felt directional mechanical properties, such as e.g. B. hardness, elasticity and strength, and a low dielectric constant ε, a low loss win kel tgδ and high rigidity.

In der Zeichnung ist ein Ausführungsbeispiel nach der Er­ findung dargestellt, und zwar zeigt die einzige Figur einen Schnitt durch einen Teilbereich eines Radomes.In the drawing is an embodiment according to the Er invention, and that the only figure shows one Section through a section of a radome.

Das nur teilweise ersichtliche Radom, das als Hybrid-Radom ausgeführt ist, weist einen Kern 1 aus Polyimid-Nadelfilz sowie eine innere Decklage 2 und eine äußere Decklage 3 aus Duro- oder Thermoplastmatrix- bzw. Polymermaterialen auf, die faserverstärkt sein können und wobei die Faserverstär­ kung aus Endlosfasern bestehen kann. Die Decklagen 2 und 3, die ohne ein artfremdes Klebematerial durch ein Temperatur- Druckverfahren mit dem Kern aus Polyimid-Nadelfilz festver­ bunden sind, können aus duroplastischen Polyimid-Matrix­ materialen bestehen, z. B. auf der Basis eines Maleinimid­ harzes, aus thermoplastischen Polyimid-Matrixmaterialien oder es können Bismaleinimidharze oder aromatische Polyimi­ de verwendet werden. Die Matrixmaterialien können vorzugs­ weise faserverstärkt ausgeführt sein.The only partially visible radome, which is designed as a hybrid radome, has a core 1 made of polyimide needle felt and an inner cover layer 2 and an outer cover layer 3 made of thermosetting or thermoplastic matrix or polymer materials, which can be fiber-reinforced and which Fiber reinforcement can consist of continuous fibers. The cover layers 2 and 3 , which are fixed without a foreign adhesive material by a temperature-pressure process with the core made of polyimide needle felt, can consist of thermosetting polyimide matrix materials, for. B. on the basis of a maleimide resin, from thermoplastic polyimide matrix materials or bismaleimide resins or aromatic polyimides can be used. The matrix materials can preferably be made fiber-reinforced.

Claims (9)

1. Radom mit Hochtemperatureigenschaften für Flugkörper bestehend aus einem Kunststoffkern und einer inneren und äußeren dünnwandigen Decklage, dadurch gekennzeichnet, daß das Radom als Hybrid-Radom mit einem Kern (1) aus Polyimid- Nadelfilz und Decklagen (2, 3) aus hochtemperaturbeständigen Duro- oder Thermoplastmatrix- bzw. Polymermaterialien ausge­ führt ist, und daß der Kern (1) und die Decklagen (2, 3) ohne ein artfremdes Klebematerial fest miteinander verbunden sind.1. Radome with high temperature properties for missiles consisting of a plastic core and an inner and outer thin-walled cover layer, characterized in that the radome as a hybrid radome with a core ( 1 ) made of polyimide needle felt and cover layers ( 2 , 3 ) made of high-temperature-resistant Duro- or thermoplastic matrix or polymer materials is out, and that the core ( 1 ) and the cover layers ( 2 , 3 ) are firmly connected to each other without an alien adhesive material. 2. Radom nach Anspruch 1, dadurch gekennzeichnet, daß die Decklagen (2, 3) aus duroplastischen Polyimid-Matrixmateri­ alien hergestellt sind.2. Radome according to claim 1, characterized in that the cover layers ( 2 , 3 ) are made of thermosetting polyimide matrix materials. 3. Radom nach Anspruch 2, dadurch kennzeichnet, daß das Polyimid-Matrixmaterial auf der Basis eines Maleinimidhar­ zes hergestellt ist.3. Radome according to claim 2, characterized in that the Polyimide matrix material based on a maleimide zes is made. 4. Radom nach Anspruch 1, dadurch gekennzeichnet, daß die Decklagen (2, 3) aus thermoplastischen Polyimid-Matrixmate­ rialien bestehen.4. Radome according to claim 1, characterized in that the cover layers ( 2 , 3 ) consist of thermoplastic polyimide matrix materials. 5. Radom nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeich­ net, daß die Decklagen aus faserverstärkten Duro- oder Ther­ moplastmatrix- bzw. Polymermaterialien, aus faserverstärkten duroplastischen Polyimid-Matrixmaterialen oder aus faserver­ stärkten thermoplastischen Polyimid-Matrixmaterialien beste­ hen. 5. Radome according to claim 1, 2, 3 or 4, characterized net that the top layers of fiber-reinforced Duro- or Ther moplastic matrix or polymer materials, made of fiber-reinforced thermosetting polyimide matrix materials or fiber strongest thermoplastic polyimide matrix materials best hen.   6. Radom nach Anspruch 2 oder 5, dadurch gekennzeichnet, daß als Matrixmaterial Bismaleinimidharze oder aromatische Polyimide verwendet sind.6. Radome according to claim 2 or 5, characterized in that that as the matrix material bismaleimide resins or aromatic Polyimides are used. 7. Radom nach Anspruch 1, dadurch gekennzeichnet, daß die Decklagen (2, 3) aus Polybenzimidazol-Polymer bestehen.7. Radome according to claim 1, characterized in that the cover layers ( 2 , 3 ) consist of polybenzimidazole polymer. 8. Radom nach Anspruch 1, dadurch gekennzeichnet, daß die Faserverstärkung aus Endlosfasern besteht.8. Radome according to claim 1, characterized in that the Fiber reinforcement consists of continuous fibers. 9. Radom nach Anspruch 1, gekennzeichnet durch ein Tempera­ tur-Druckverfahren zur Verbindung des Kern (1) mit den Deck­ lagen (2, 3).9. Radome according to claim 1, characterized by a tempera ture printing process for connecting the core ( 1 ) with the deck layers ( 2 , 3 ).
DE19893938230 1988-12-07 1989-11-17 Radome cover esp. for missile Withdrawn DE3938230A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19893938230 DE3938230A1 (en) 1989-11-17 1989-11-17 Radome cover esp. for missile
FR8916026A FR2640738A1 (en) 1988-12-07 1989-12-05 Radome exhibiting properties of strength at high temperature
GB8927529A GB2228142B (en) 1988-12-07 1989-12-06 Radome

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893938230 DE3938230A1 (en) 1989-11-17 1989-11-17 Radome cover esp. for missile

Publications (1)

Publication Number Publication Date
DE3938230A1 true DE3938230A1 (en) 1991-05-23

Family

ID=6393720

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893938230 Withdrawn DE3938230A1 (en) 1988-12-07 1989-11-17 Radome cover esp. for missile

Country Status (1)

Country Link
DE (1) DE3938230A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512304A1 (en) * 1995-04-01 1996-10-02 Daimler Benz Aerospace Airbus Lightweight composite plate mfr. and moulding tool
CN103828124A (en) * 2011-09-12 2014-05-28 帝斯曼知识产权资产管理有限公司 Composite radome wall

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841162A1 (en) * 1988-12-07 1990-06-13 Telefunken Systemtechnik Radome having high-temperature properties
DE3410501C2 (en) * 1984-03-22 1990-09-13 Dornier System Gmbh, 7990 Friedrichshafen Radome material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410501C2 (en) * 1984-03-22 1990-09-13 Dornier System Gmbh, 7990 Friedrichshafen Radome material
DE3841162A1 (en) * 1988-12-07 1990-06-13 Telefunken Systemtechnik Radome having high-temperature properties

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CRONE, G.A.E. u. a.: Design and performance of airborne radomes: a review, In: IEE Proc., Vol.128, Pt. F, No.7, Dez.1981, S.451-464 *
DONTI, D.A.: Special Problems associated with aircraft radomes, In: IEE Proc., Vol.128, Pt. F, No.7, Dez. 1981, S.412-418 *
KLUNDE, J. u.a.: Hybriden aus Glas- und anderen Verstärkungsfasern, In: Kunststoffberater 12/1987,S.37-40 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512304A1 (en) * 1995-04-01 1996-10-02 Daimler Benz Aerospace Airbus Lightweight composite plate mfr. and moulding tool
DE19512304C2 (en) * 1995-04-01 1999-01-28 Daimler Benz Aerospace Airbus Lightweight composite panel and use of a core for producing a lightweight composite panel
CN103828124A (en) * 2011-09-12 2014-05-28 帝斯曼知识产权资产管理有限公司 Composite radome wall

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