JPH0738274A - Production of electromagnetic wave absorber - Google Patents
Production of electromagnetic wave absorberInfo
- Publication number
- JPH0738274A JPH0738274A JP19774693A JP19774693A JPH0738274A JP H0738274 A JPH0738274 A JP H0738274A JP 19774693 A JP19774693 A JP 19774693A JP 19774693 A JP19774693 A JP 19774693A JP H0738274 A JPH0738274 A JP H0738274A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- mixed
- dies
- radio wave
- wave loss
- 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.)
- Pending
Links
Landscapes
- Details Of Measuring And Other Instruments (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電波吸収体の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a radio wave absorber.
【０００２】[0002]
【従来技術及びその課題】広い周波数範囲で吸収性能を
得る一つの方法として、吸収体の表面をピラミッド状又
は波状等に加工し、凹凸を設ける方法がある。2. Description of the Related Art As one method for obtaining absorption performance in a wide frequency range, there is a method in which the surface of an absorber is processed into a pyramid shape, a wavy shape or the like to provide irregularities.
【０００３】従来、この凹凸を形成する方法として、予
め電波吸収体材料でブロックを製造し、これを刃物で切
断して表面に凹凸を形成する方法、あるいは、発泡スチ
レンビーズと電波損失材料とを混合し、所望の形状の凹
凸を有する型の中でこれを発泡させ、凹凸を形成する方
法などが行われていた。Conventionally, as a method of forming the unevenness, a block is manufactured in advance from a radio wave absorber material, and the block is cut with a blade to form the unevenness, or foamed styrene beads and a radio wave loss material are used. A method of forming irregularities by mixing and foaming this in a mold having irregularities of a desired shape has been performed.
【０００４】しかし、これらの方法は、電波吸収体材料
のブロックを切断するため、電波吸収体材料に無駄が多
く出たり、発泡時の圧力に耐える頑丈な型や発泡させる
ための大掛かりな設備を必要とする等の課題があった。However, since these methods cut the block of the electromagnetic wave absorber material, a large amount of waste is generated in the electromagnetic wave absorber material, a sturdy mold that withstands the pressure at the time of foaming and a large-scale equipment for foaming are used. There were issues such as the need.
【０００５】本発明は、こられの欠点を除いて、電波吸
収体に容易に凹凸を形成させる方法を提供する。The present invention eliminates these drawbacks and provides a method for easily forming irregularities on a radio wave absorber.
【０００６】[0006]
【課題を解決するための手段】本発明によると、上記の
とおりの課題が、柔軟な材料に、電波に対して損失を生
ぜしめる電波損失材料を混入し、該損失材料を混入した
該柔軟な材料に、硬化材料を混入し、これを凹凸を有す
る型に嵌め込み、硬化させることを含むことを特徴とす
る凹凸表面を有する電波吸収体の製造方法を提供するこ
とによって、解決される。According to the present invention, the above-mentioned problems are solved by mixing a flexible material with a radio wave loss material that causes a loss in radio waves, and mixing the flexible material with the loss material. A solution is provided by providing a method of manufacturing a radio wave absorber having an uneven surface, which comprises mixing a hardening material into a material, fitting the material into a mold having unevenness, and hardening the material.
【０００７】通常粉末あるいは短い繊維状の電波損失材
料を、柔軟な材料に混入せしめるため、その取り扱いが
容易になる。更に、所望の形状を得るために、ブロック
等を切断する必要がないので、電波損失材料が無駄にな
ることがない。[0007] Usually, a powder or a short fibrous radio wave loss material is mixed with a flexible material, so that the handling becomes easy. Furthermore, since it is not necessary to cut the block or the like to obtain the desired shape, the radio wave loss material is not wasted.
【０００８】また、本発明に従うと、所望の形状を得る
ために、大きな圧力に耐える丈夫な型を必要とすること
がなく、大掛かりな設備も不要であり、簡易な型を使用
することができる。Further, according to the present invention, in order to obtain a desired shape, there is no need for a durable mold capable of withstanding a large pressure, large equipment is not required, and a simple mold can be used. .
【０００９】[0009]
【実施例】次に、図１を参照して、本発明の好適実施例
を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to FIG.
【００１０】柔軟な材料、例えば発泡ウレタンのシート
１を準備する。この発泡ウレタンは、気泡が連結してい
るオープンセル構造の発泡体であるので、下記のとおり
の損失材料及び硬化材料を内部まで容易にしみこませる
ことができるので好ましい。発泡ウレタンの代わりに、
他の発泡プラスチック材料、あるいは織布、不織布、紙
等も用いることができる。A sheet 1 of flexible material, for example urethane foam, is prepared. Since this urethane foam is an open-cell structure foam in which air bubbles are connected, it is preferable because the loss material and the curing material as described below can be easily penetrated into the inside. Instead of urethane foam,
Other foamed plastic materials, or woven cloth, non-woven cloth, paper, etc. can also be used.
【００１１】柔軟な材料に、電波損失材料を混入せしめ
る。電波損失材料としては、例えば、誘電体損失を利用
する炭素粉を混入した水溶性の導電性塗料を用いること
ができる。このような塗料を、例えば、柔軟な材料に塗
布し、混入せしめ、しかる後、これを乾燥させる。Radio wave loss material is mixed into a flexible material. As the radio wave loss material, for example, a water-soluble conductive paint mixed with carbon powder that utilizes dielectric loss can be used. Such a paint is applied to, for example, a flexible material, mixed in, and then dried.
【００１２】他の電波損失材料として、炭素繊維、酸化
金属粉乃至繊維、導電性プラスチック粉乃至繊維等を用
いることができる。As other radio wave loss materials, carbon fiber, metal oxide powder or fiber, conductive plastic powder or fiber, etc. can be used.
【００１３】柔軟な材料として、織布、不織布、紙等を
用いる場合には、これに炭素繊維等の電波損失材料を、
予め織り込んだり、すき込んだりすることによって、電
波損失材料を混入せしめることができる。When woven cloth, non-woven cloth, paper, etc. are used as the soft material, a radio wave loss material such as carbon fiber is added to this.
It is possible to mix the radio wave loss material by weaving it in or piling it in beforehand.
【００１４】電波損失材料は、柔軟な材料の表面のみに
付着させておくこともできるが、柔軟な材料の内部まで
均一に分布させておくことが好ましい。これは、電波の
伝播方向に対する空間から急激なインピーダンスの変化
が、反射を強く発生せしめるためである。The radio wave loss material may be adhered only to the surface of the flexible material, but it is preferable that the material is evenly distributed inside the flexible material. This is because a rapid impedance change from the space with respect to the propagation direction of radio waves causes strong reflection.
【００１５】このように、柔軟な材料に電波損失材料を
混入せしめることによって、粉体や液体の電波損失材料
を取り扱うよりも、取り扱い方が容易になる。By mixing the electromagnetic wave loss material in the flexible material, the handling becomes easier than the case of handling the electromagnetic wave loss material in the form of powder or liquid.
【００１６】次に、電波損失材料を混入せしめた柔軟な
材料に、硬化材料を混入せしめる。硬化材料は、柔軟な
材料の表面のみに混入させることも、内部深くまで混入
せしめることもできる。硬化材料としては、エポキシ樹
脂等の熱硬化性樹脂、セメント、石膏等を用いることが
できる。Next, a hardening material is mixed with a flexible material containing a radio wave loss material. The curable material can be mixed only in the surface of the flexible material or can be mixed deep inside. A thermosetting resin such as an epoxy resin, cement, gypsum, or the like can be used as the curing material.
【００１７】上記のとおりの電波損失材料を混入せしめ
た柔軟な材料に、硬化材料を混入して、これを型２に嵌
め込み、硬化せしめた後に、型２から取り出す。A hard material is mixed in a flexible material in which the above-mentioned radio wave loss material is mixed, and the hard material is fitted into the mold 2, and after being hardened, it is taken out from the mold 2.
【００１８】このようにして、凹凸表面を有する電波吸
収体３を得る。In this way, the radio wave absorber 3 having the uneven surface is obtained.
【００１９】[0019]
【発明の効果】本発明によると、電波損失材料を無駄に
することがなく、大きな圧力に耐える丈夫な型を必要と
することがなく、大掛かりな設備も不要であり、簡易な
型を使用することができる。According to the present invention, a simple mold is used without waste of radio wave loss material, no need for a durable mold capable of withstanding a large pressure, and no need for large-scale equipment. be able to.
【図１】本発明の好適実施例に従う電波吸収体の製造方
法の工程を示す簡略図。FIG. 1 is a simplified diagram showing steps of a method of manufacturing a radio wave absorber according to a preferred embodiment of the present invention.
１ 発泡ウレタンのシート ２ 型 ３ 電波吸収体 1 urethane foam sheet 2 type 3 radio wave absorber
Claims (1)
しめる電波損失材料を混入し、 該損失材料を混入した柔軟な材料に、硬化材料を混入
し、これを凹凸を有する型に嵌め込み、硬化させること
を含むことを特徴とする凹凸表面を有する電波吸収体の
製造方法。1. A soft material is mixed with a radio wave loss material that causes a loss to a radio wave, a flexible material mixed with the loss material is mixed with a hardening material, and this is fitted into a mold having irregularities. A method of manufacturing an electromagnetic wave absorber having an uneven surface, the method including: curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19774693A JPH0738274A (en) | 1993-07-16 | 1993-07-16 | Production of electromagnetic wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19774693A JPH0738274A (en) | 1993-07-16 | 1993-07-16 | Production of electromagnetic wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0738274A true JPH0738274A (en) | 1995-02-07 |
Family
ID=16379659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19774693A Pending JPH0738274A (en) | 1993-07-16 | 1993-07-16 | Production of electromagnetic wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0738274A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009788A1 (en) * | 1996-09-03 | 1998-03-12 | Tokin Corporation | Method of manufacturing composite magnetic sheet |
| JP2004247720A (en) * | 2003-01-22 | 2004-09-02 | Toray Ind Inc | Wave absorber |
| WO2010113303A1 (en) * | 2009-04-01 | 2010-10-07 | 特種製紙株式会社 | Electromagnetic wave absorption structure |
| CN108016099A (en) * | 2017-12-05 | 2018-05-11 | 大连东信微波技术有限公司 | Absorbing material applied to microwave absorption test darkroom aisle region and preparation method thereof |
| CN112874030A (en) * | 2021-01-18 | 2021-06-01 | 四川航龙航空工业有限公司 | Wedge-shaped radar fabric wave-absorbing structure and preparation method thereof |
-
1993
- 1993-07-16 JP JP19774693A patent/JPH0738274A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009788A1 (en) * | 1996-09-03 | 1998-03-12 | Tokin Corporation | Method of manufacturing composite magnetic sheet |
| US6187120B1 (en) * | 1996-09-03 | 2001-02-13 | Tokin Corporation | Method of manufacturing composite magnetic sheet |
| JP2004247720A (en) * | 2003-01-22 | 2004-09-02 | Toray Ind Inc | Wave absorber |
| WO2010113303A1 (en) * | 2009-04-01 | 2010-10-07 | 特種製紙株式会社 | Electromagnetic wave absorption structure |
| CN108016099A (en) * | 2017-12-05 | 2018-05-11 | 大连东信微波技术有限公司 | Absorbing material applied to microwave absorption test darkroom aisle region and preparation method thereof |
| CN112874030A (en) * | 2021-01-18 | 2021-06-01 | 四川航龙航空工业有限公司 | Wedge-shaped radar fabric wave-absorbing structure and preparation method thereof |
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