JPH0325959B2 - - Google Patents
Info
- Publication number
- JPH0325959B2 JPH0325959B2 JP63200208A JP20020888A JPH0325959B2 JP H0325959 B2 JPH0325959 B2 JP H0325959B2 JP 63200208 A JP63200208 A JP 63200208A JP 20020888 A JP20020888 A JP 20020888A JP H0325959 B2 JPH0325959 B2 JP H0325959B2
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- wave absorber
- rectangular parallelepiped
- conductive material
- pyramidal
- 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
Links
- 239000006096 absorbing agent Substances 0.000 claims description 30
- 239000004020 conductor Substances 0.000 claims description 19
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 239000006260 foam Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電波暗室の壁面を構成する電波吸収体
並びにその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio wave absorber constituting the wall surface of an anechoic chamber and a method for manufacturing the same.
電子機器の高性能化・小型化の進展につれて雑
音電波の放射とそれに伴う障害が増える事態にあ
り、法的にも次第に規制が強められているところ
から、電子機器から放射される雑音電波を正確に
把握するための電波暗室の需要が増大している。
As the performance and miniaturization of electronic devices progress, the emission of noise radio waves and the resulting disturbances are increasing, and legal regulations are gradually becoming stricter. There is an increasing demand for anechoic chambers to understand the effects of radio waves.
電波暗室は、外部からの電波の侵入を阻止する
ためのシールドルームと、シールドルーム内にお
いて発生する不要電波を吸収するための電波吸収
体とからなる。 The anechoic chamber consists of a shield room for preventing radio waves from entering from the outside, and a radio wave absorber for absorbing unnecessary radio waves generated within the shield room.
電波吸収体はシールドルーム空間とシールド壁
面（金属壁面）との電磁波的整合をとるもので、
カーボン微粒子などの導電性材料を均等に含ませ
た発泡ウレタンを方錐形や楔形にしたものであ
る。方錐形発泡ウレタンの場合、第６図に示すよ
うに、人手で取扱える大きさの発泡ウレタン基台
（例えば辺長600mm程度）の上に複数個（図では９
個）の方錐体をきつちり並べた集合方錐台体が単
位体として作られ、シールドルームの側壁および
天井に基台底面を接着剤により接着して貼りつけ
られていた。 The radio wave absorber matches electromagnetic waves between the shield room space and the shield wall (metal wall).
It is made of urethane foam evenly impregnated with a conductive material such as carbon particles and shaped into a pyramid or wedge shape. In the case of pyramidal urethane foam, as shown in Figure 6, multiple pieces (9 in the figure) are placed on a urethane foam base (for example, side length of about 600 mm) that is large enough to be handled by hand.
A collection of pyramids (individual) pyramids arranged tightly together was made as a unit, and the bottom of the base was attached to the side walls and ceiling of the shield room with adhesive.
電波吸収体の単位体は、発泡ウレタン樹脂に導
電性材料を混ぜ合わせて、これを金型に入れ発泡
を行わせ成形して作られ、または発泡ウレタンの
塊りに導電性材料を含浸したものから切り出して
作られていた。 The radio wave absorber unit is made by mixing urethane foam resin with a conductive material, placing it in a mold and foaming it, or by impregnating a mass of urethane foam with a conductive material. It was made by cutting out from.
従来の電波吸収体は、金型が大型で高価であ
り、切削工数が多いので、製造原価が高いという
問題と、方錐形や楔形の尖端部、稜部が損傷され
易く、単位体を交換すべき頻度が高く、交換作業
は面倒で多くの工数を要するので補修費が高いと
いう種々の問題点があつた。
Conventional radio wave absorbers have large and expensive molds and require a large number of cutting steps, resulting in high manufacturing costs, and the points and ridges of pyramidal and wedge shapes are easily damaged, making it difficult to replace the unit. There have been various problems such as high frequency of replacement, troublesome and time-consuming replacement work, and high repair costs.
本発明の目的は、損傷する惧れの少ない新規な
構造をもつ安価な電波吸収体とその製造方法に係
る。
An object of the present invention is to provide an inexpensive radio wave absorber having a novel structure with little risk of damage, and a method for manufacturing the same.
即ち、本発明は、所定寸法の発泡ウレタン直方
体を型材分割片で側方から押圧し方錐形状または
楔形状に圧縮した状態で発泡ウレタンにカーボン
微粒子などの導電性材料を含浸した後、型材を外
して直方体に復元させた電波吸収体素子を、所定
の基台の上に並べて固着することを特徴とする電
波吸収体の製造方法とかくして得た直方体のウレ
タン樹脂でモールドしてなる電波吸収体自体に関
する。 That is, in the present invention, a urethane foam rectangular parallelepiped of a predetermined size is pressed from the side with split pieces of the molding material to compress it into a pyramidal shape or a wedge shape, and after impregnating the foamed urethane with a conductive material such as fine carbon particles, the molding material is A method for producing a radio wave absorber, characterized in that the radio wave absorber elements, which have been removed and restored to a rectangular parallelepiped, are arranged and fixed on a predetermined base.A radio wave absorber formed by molding the thus obtained rectangular parallelepiped with urethane resin. Regarding itself.
電波吸収体素子は、その直方体の中に導電性材
料が方錐体または楔体の高さ方向における導電性
材料の量の変化にほぼ対応するように含まれてい
るので、従来の方錐体または楔体とほぼ同等の水
準の電波吸収率をもつ。
The radio wave absorber element has a conductive material contained in its rectangular parallelepiped so that the amount of conductive material approximately corresponds to the change in the height direction of the pyramid or wedge, so it is different from the conventional pyramid. Or, it has a radio wave absorption rate almost equivalent to that of a wedge body.
以下本発明を実施例につき、図面にしたがつて
説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments and drawings.
第１図は本発明による電波吸収体の単位体の一
実施例を示す外観図である。図において、１は直
方体の構造をもつ電波吸収体素子で、２は発泡ウ
レタンに均等に導電性材料を含ませた電波吸収体
の基台である。 FIG. 1 is an external view showing an embodiment of a radio wave absorber unit according to the present invention. In the figure, 1 is a radio wave absorber element having a rectangular parallelepiped structure, and 2 is a base of the radio wave absorber made of urethane foam evenly impregnated with a conductive material.
電波吸収体素子１は、第２図に示す所定の機構
率をもつ発泡ウレタン直法体１０と、４個１組の
型材分割片３，４とを用いて作られる。直方体１
０より充分に大きい型材分割片３の２個により、
第３図に示すように直方体１０の対向側面を型材
分割片３の傾斜面で側方から押圧して底面は元の
ままの楔形体１１に弾性変形させ、次に型材分割
片３の楔形間隙に型材分割片４を両側から差し込
んで楔形体１１の三角形の対向側面を型材分割片
４の傾斜面で側方から押圧し底面は元のままの方
錐形体１２に弾性変形させる。次に、第４図に示
すように方錐形体１２に圧縮したままの状態で、
導電性材料を分散させた含浸液層（図示しない）
に浸漬し、方錐形体１２内に導電性材料を含浸さ
せて引き上げる。方錐形体１２は直方体１０を四
方側方から圧縮したので、気孔率は高さ方向に連
続的に変化するものとなり、したがつて導電性材
料の含浸量が気孔率の変化に準じた変化となる。
型材３，４を外すと方錐形体１２は元の直方体１
０にほぼ復元する。電波吸収体素子１はこのよう
に導電性材料を含浸して復元されたものである。
電波吸収体素子１の上端面の有底小孔５は、外観
では上端面と底面を見分け難いので、上端面を表
わす目印として設けられている。電波吸収体素子
１は従来の方錐体における高さ方向の導電性材料
の量の変化に準じた導電性材料を含有しているの
で、従来の方錐体と同等の吸収性能がある。 The radio wave absorber element 1 is made using a foamed urethane straight body 10 having a predetermined mechanism ratio as shown in FIG. 2, and a set of four divided mold pieces 3, 4. Cuboid 1
By two of the mold material dividing pieces 3 that are sufficiently larger than 0,
As shown in FIG. 3, the opposite side surfaces of the rectangular parallelepiped 10 are pressed from the sides by the inclined surfaces of the section 3 to elastically deform the bottom surface into a wedge-shaped body 11 with its original shape, and then the wedge-shaped gap between the section 3 is formed. The shape material division pieces 4 are inserted from both sides, and the triangular opposing side surfaces of the wedge-shaped body 11 are pressed from the sides by the inclined surfaces of the shape material division pieces 4, so that the bottom surface is elastically deformed into a pyramidal shape body 12 with its original shape. Next, as shown in FIG. 4, while compressed into the pyramidal body 12,
Impregnation liquid layer with conductive material dispersed (not shown)
The pyramid-shaped body 12 is impregnated with a conductive material and then pulled up. Since the pyramidal body 12 is made by compressing the rectangular parallelepiped 10 from all sides, the porosity changes continuously in the height direction, and therefore the amount of impregnation of the conductive material changes in accordance with the change in the porosity. Become.
When the shapes 3 and 4 are removed, the pyramidal body 12 returns to the original rectangular parallelepiped 1.
Almost restored to 0. The radio wave absorber element 1 is thus restored by impregnating it with a conductive material.
The small hole 5 with a bottom in the upper end surface of the radio wave absorber element 1 is provided as a mark representing the upper end surface since it is difficult to distinguish the upper end surface from the bottom surface in appearance. Since the radio wave absorber element 1 contains a conductive material that corresponds to the change in the amount of conductive material in the height direction of a conventional pyramid, it has absorption performance equivalent to that of a conventional pyramid.
第１図に示す直方体状の電波吸収体の単位体
は、第６図に示した従来の集合方錐台体の単位体
と同等の機能をもつものである。 The rectangular parallelepiped radio wave absorber unit shown in FIG. 1 has the same function as the conventional truncated pyramidal unit shown in FIG.
第５図は本発明の他の実施例で鎖線で示すよう
に３個の楔体を並べた従来の集合楔台体の単位体
に相当する性能をもつ。図において電波吸収体素
子１は、第１図の実施例について説明したと同様
に、発泡ウレタン直方体を側方から楔形に圧縮し
導電性材料を含浸してから元の直方体に復元させ
たもので斜線部分に導電性材料が含まれている。 FIG. 5 shows another embodiment of the present invention, which has performance equivalent to that of a conventional collective wedge base unit in which three wedge bodies are arranged side by side as shown by the chain line. In the figure, the radio wave absorber element 1 is made by compressing a foamed urethane rectangular parallelepiped from the side into a wedge shape, impregnating it with a conductive material, and then restoring it to the original rectangular parallelepiped, in the same way as described for the embodiment shown in FIG. The conductive material is included in the shaded area.
実施例では、型材３，４により完全な方錐体に
圧縮する場合を示したが、圧縮された直方体の高
さ方向の気孔率の変化が従来の方錐体また楔体の
高さ方向の導電性材料の量の変化とほぼ同じにな
形に側方だけから圧縮すればよい。 In the example, a case was shown in which the shapes are compressed into a complete pyramid using the shapes 3 and 4, but the change in porosity in the height direction of the compressed rectangular parallelepiped is different from that in the height direction of a conventional pyramid or wedge. It is only necessary to compress it from the sides in a shape that is approximately the same as the change in the amount of conductive material.
本発明による電波吸収体の製造方法は、直方体
の電波吸収体素子を用いるので、金型が単純で小
型でよく切削することもなく、従来より製造費を
低減できる。またかくして製造された直方体の電
波吸収体は取扱い易くシールド壁面に貼り付ける
作業が簡単になり暗室の工事費を低減でき且つ突
起部がないので損傷する惧れが殆どないので補修
費を削減できるなど多くの効果がある。
Since the method for manufacturing a radio wave absorber according to the present invention uses a rectangular parallelepiped radio wave absorber element, the mold is simple and small, and requires no cutting, making it possible to reduce manufacturing costs compared to conventional methods. In addition, the rectangular parallelepiped radio wave absorber manufactured in this way is easy to handle and can be easily attached to the shield wall, reducing construction costs for darkrooms.Since there are no protrusions, there is almost no risk of damage, so repair costs can be reduced. It has many effects.
第１図は本発明による電波吸収体の単位体の一
実施例を示す外観図、第２図乃至第４図は第１図
における電波吸収体素子の製造工程を説明するた
めの斜視図、第５図は本発明の他の実施例を示す
外観図、第６図は従来例を示す外観図である。
１：電波吸収体素子、２：電波吸収体基台、
３，４：型材分割片、５：小孔、１０：発泡ウレ
タン直方体、１１：楔形体、１２：方錐形体。
FIG. 1 is an external view showing an embodiment of the radio wave absorber unit according to the present invention, FIGS. 2 to 4 are perspective views for explaining the manufacturing process of the radio wave absorber element in FIG. FIG. 5 is an external view showing another embodiment of the present invention, and FIG. 6 is an external view showing a conventional example. 1: Radio wave absorber element, 2: Radio wave absorber base,
3, 4: Divided piece of mold material, 5: Small hole, 10: Foamed urethane rectangular parallelepiped, 11: Wedge-shaped body, 12: Pyramid-shaped body.
Claims (1)
方から押圧し、方錐形状または楔形状に圧縮した
状態において前記発泡ウレタンに導電性材料を含
浸した後、型材を外して直方体に復元させた電波
吸収体素子を所定の基台上に並べて固着すること
を特徴とする電波吸収体の製造方法。 ２ 導電性材料を含有し発泡ウレタン樹脂でモー
ルドしてなる直方体を有する電波吸収体におい
て、 前記直方体に含まれる前記導電製材料の分布領
域は、方錐体または楔形体を呈することを特徴と
する電波吸収体。[Scope of Claims] 1 A rectangular parallelepiped of foamed urethane is pressed from the side with a mold material dividing piece to impregnate the foamed urethane with a conductive material in a state compressed into a pyramidal or wedge shape, and then the molded material is removed to form a rectangular parallelepiped. 1. A method for manufacturing a radio wave absorber, which comprises arranging and fixing radio wave absorber elements restored to a predetermined base on a predetermined base. 2. A radio wave absorber having a rectangular parallelepiped containing a conductive material and molded with foamed urethane resin, characterized in that a distribution area of the conductive material contained in the rectangular parallelepiped has a pyramidal shape or a wedge shape. Radio wave absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63200208A JPH0250497A (en) | 1988-08-12 | 1988-08-12 | Radio wave absorber and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63200208A JPH0250497A (en) | 1988-08-12 | 1988-08-12 | Radio wave absorber and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0250497A JPH0250497A (en) | 1990-02-20 |
| JPH0325959B2 true JPH0325959B2 (en) | 1991-04-09 |
Family
ID=16420606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63200208A Granted JPH0250497A (en) | 1988-08-12 | 1988-08-12 | Radio wave absorber and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0250497A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114319A1 (en) | 2006-03-31 | 2007-10-11 | Chugai Seiyaku Kabushiki Kaisha | Method for control of blood kinetics of antibody |
-
1988
- 1988-08-12 JP JP63200208A patent/JPH0250497A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0250497A (en) | 1990-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090409 Year of fee payment: 18 |