JPH0250497A - Radio wave absorber and manufacture thereof - Google Patents
Radio wave absorber and manufacture thereofInfo
- Publication number
- JPH0250497A JPH0250497A JP63200208A JP20020888A JPH0250497A JP H0250497 A JPH0250497 A JP H0250497A JP 63200208 A JP63200208 A JP 63200208A JP 20020888 A JP20020888 A JP 20020888A JP H0250497 A JPH0250497 A JP H0250497A
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- wave absorber
- conductive material
- shape
- pieces
- 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.)
- Granted
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000004020 conductor Substances 0.000 claims abstract description 19
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000006260 foam Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 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
- 239000012778 molding material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 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
- 238000005470 impregnation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Abstract
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。An 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。The radio wave absorber matches electromagnetic waves between the shield room space and the shield wall (metal wall), and is made of urethane foam evenly impregnated with conductive materials such as carbon particles in the shape of a pyramid or wedge. .
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６０
０ ＋ｅ＋ｓ程度）の上に複数個（図では９個）の方椎
体をきっ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。In the case of pyramidal urethane foam, as shown in Fig.
A grouped truncated pyramid body is made by arranging multiple (nine in the figure) vertebral bodies tightly on top of (approximately 0 + e + s), and the bottom of the base is glued to the side wall and ceiling of the shield room. It was pasted on.
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った。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 in that the frequency of replacement is high, and the replacement work is troublesome and requires a lot of man-hours, resulting in 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椎
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 contains conductive material in its rectangular parallelepiped in such a way that it approximately corresponds to the change in the amount of conductive material in the height direction of the pyramidal body or cuneiform body, so it is different from the conventional pyramidal body. 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、図面にしたがって説明する
。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１０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１
０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、したがって導電性材料
の含浸量が気孔率の変化に準じた変化となる。The radio wave absorber element 1 consists of a foamed urethane straight body 10 having a predetermined mechanism ratio as shown in FIG.
It is made using 4. As shown in FIG.
0 is pressed from the side with the inclined surface of the mold material division piece 3 to elastically deform it into a wedge-shaped body 11 with the bottom surface unchanged, and then the mold material division piece 4 is inserted into the wedge-shaped gap of the mold material division piece 3 from both sides. Insert the wedge-shaped body 11. The opposite sides of the triangle are pressed from the sides by the inclined surfaces of the mold material division pieces 4, and the bottom surface remains the same as the original pyramid-shaped body 12.
It is elastically deformed. Next, as shown in FIG. 4, the pyramid-shaped body 12 is immersed in an impregnating liquid layer (not shown) in which a conductive material is dispersed while the pyramid-shaped body 12 remains compressed. Impregnate and pull out. Since the pyramidal body 12 compresses 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.
型材３，４を外すと方錐形体１２は元の直方体１０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。When the shapes 3 and 4 are removed, the pyramidal body 12 is almost restored to its original rectangular parallelepiped shape 10. The radio wave absorber element 1 is thus restored by impregnating it with a conductive material.
電波吸収体素子１の上端面の有底小孔５は、外観では上
端面と底面を見分は難いので、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 small hole 5 with a bottom in the upper end face of the radio wave absorber element 1 is provided as a mark representing the upper end face, since it is difficult to distinguish between the upper end face and the bottom face 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合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 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により完全な方椎体に圧縮する
場合を示したが、圧縮された直方体の高さ方向の気孔率
の変化が従来の方椎体また楔体の高さ方向の導電体材料
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 a complete vertebral body is compressed using the shape material 3.4, but the change in porosity in the height direction of the compressed cuboid is different from that in the height direction of conventional vertebral bodies or cuneiform bodies. 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.
直方体、１１：楔形体、１２：方錐形体。Rectangular parallelepiped, 11: cuneiform, 12: pyramid.
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：発泡ウレタン第１図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: Urethane foam Figure 1
Claims (2)
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。1. A radio wave absorber in which a rectangular parallelepiped of foamed urethane is pressed from the side with a mold material dividing piece, compressed into a pyramidal or wedge shape, the foamed urethane is impregnated with a conductive material, and then the molded material is removed and restored to a rectangular parallelepiped. A method for manufacturing a radio wave absorber, which comprises arranging and fixing elements on a predetermined base.
であり全体は直方体の発泡ウレタン樹脂でモールドして
なる電波吸収体。2. The part impregnated with a conductive material is pyramid-shaped or wedge-shaped, and the entire radio wave absorber is molded with a rectangular parallelepiped foamed urethane resin.
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 true JPH0250497A (en) | 1990-02-20 |
| JPH0325959B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4001409A1 (en) | 2006-03-31 | 2022-05-25 | Chugai Seiyaku Kabushiki Kaisha | Methods for controlling blood pharmacokinetics of antibodies |
-
1988
- 1988-08-12 JP JP63200208A patent/JPH0250497A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4001409A1 (en) | 2006-03-31 | 2022-05-25 | Chugai Seiyaku Kabushiki Kaisha | Methods for controlling blood pharmacokinetics of antibodies |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0325959B2 (en) | 1991-04-09 |
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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 |