JPH04113819A - Manufacture of parabola antenna - Google Patents
Manufacture of parabola antennaInfo
- Publication number
- JPH04113819A JPH04113819A JP23329590A JP23329590A JPH04113819A JP H04113819 A JPH04113819 A JP H04113819A JP 23329590 A JP23329590 A JP 23329590A JP 23329590 A JP23329590 A JP 23329590A JP H04113819 A JPH04113819 A JP H04113819A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sheet
- electromagnetic wave
- reflecting layer
- resin
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000465 moulding Methods 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- 238000000748 compression moulding Methods 0.000 claims abstract description 12
- 238000001746 injection moulding Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 11
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011888 foil Substances 0.000 abstract description 4
- 239000002033 PVDF binder Substances 0.000 abstract description 2
- 229920002959 polymer blend Polymers 0.000 abstract description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 20
- 239000005001 laminate film Substances 0.000 description 6
- 239000003677 Sheet moulding compound Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 229920002620 polyvinyl fluoride Polymers 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920006125 amorphous polymer Polymers 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14811—Multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3456—Antennas, e.g. radomes
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、パラボラアンテナの製造方法に関し、電磁波
反射層を有するシートを、基板を射出・圧縮成形すると
同時に該基板と一体化するパラボラアンテナの製造方法
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a parabolic antenna, in which a sheet having an electromagnetic wave reflecting layer is integrally formed with a substrate at the same time as the substrate is injection-compression molded. Regarding the manufacturing method.
従来、パラボラアンテナの製造方法として、熱硬化性樹
脂成形材料であるシートモールデイングコンパウンド（
ＳＭＣ）による圧縮成形（特開昭６３−２１１８０２号
なと）やポリフェニレンオキサイドなとの熱可塑性樹脂
を射出成形する方法（特開昭６４−８９６０３号なと）
なとが知られている。Traditionally, the manufacturing method for parabolic antennas has been to use a sheet molding compound (a thermosetting resin molding material).
SMC) compression molding (JP 63-211802) and injection molding of thermoplastic resins such as polyphenylene oxide (JP 64-89603)
Nato is known.
ＳＭＣによる圧縮成形では、ＳＭＣの凹側の面に電磁波
反射層として金属繊維、金属をコーティングしたガラス
繊維あるいは凹状に予備成形した金属箔等を置き、圧縮
成形した後、電磁波反射層の保護及び美観のため仕上塗
装をしている。この方法では、電磁波反射層を基板の成
形と同時に形成で、きるか、熱硬化性樹脂であるため成
形時間か長い欠点がある。In compression molding using SMC, metal fibers, glass fibers coated with metal, metal foil preformed in a concave shape, etc. are placed as an electromagnetic wave reflecting layer on the concave side of the SMC, and after compression molding, protection and aesthetics of the electromagnetic wave reflecting layer are placed. Because of this, the finish is painted. This method has the disadvantage that the electromagnetic wave reflecting layer can be formed at the same time as the substrate is molded, or that the molding time is long because it is made of thermosetting resin.
一方、熱可塑性樹脂による射出成形では、成形後凹面に
電磁波反射層として導電筐料を塗布し、次いて仕上塗装
をしている。この方法ではＳＭＣによる圧縮成形に比べ
成形時間が１／３〜１／４に短縮てきるか、塗装工程が
必要である。塗装工程は溶剤の飛散防止のため、高価な
装置を必要とし、パラボラアンテナの製造価格を高いも
のにしている。On the other hand, in injection molding using thermoplastic resin, a conductive casing material is applied as an electromagnetic wave reflecting layer to the concave surface after molding, and then a final coating is applied. In this method, the molding time is reduced to 1/3 to 1/4 compared to compression molding using SMC, or a painting process is required. The painting process requires expensive equipment to prevent solvent from scattering, making parabolic antennas expensive to manufacture.
これら従来から行われてきた成形方法を改善するために
、射出成形にて電磁波反射層を含むフィルムを同時成形
する提案が種々なされている（例えば、特開昭６０−１
６７５０３号、特開平１−８９６０３号なと）。しかし
、これらの方法では必ずしも満足な結果が得られていな
い。即ち、射出成形では６００〜１５００ｋｇ／ｃｄの
高圧て樹脂を注入するため、金型内に挿入した電磁波反
射層を含むラミネートフィルムか破れる事態かしばしば
発生する。In order to improve these conventional molding methods, various proposals have been made to simultaneously mold a film containing an electromagnetic wave reflecting layer by injection molding (for example, JP-A No. 60-1
No. 67503, JP-A No. 1-89603). However, these methods do not always yield satisfactory results. That is, in injection molding, resin is injected under high pressure of 600 to 1,500 kg/cd, so that the laminate film containing the electromagnetic wave reflective layer inserted into the mold often breaks.
本発明は、以上のような従来の方法で起っている種々の
欠点を解決しようとするものであって、その目的とする
ところは、成形時に金型内に挿入した電磁波反射層を有
するシートが破損することなく成形てきるパラボラアン
テナを提供することにある。The present invention aims to solve the various drawbacks that occur in the conventional methods as described above, and its purpose is to provide a sheet with an electromagnetic wave reflecting layer inserted into a mold during molding. An object of the present invention is to provide a parabolic antenna that can be molded without being damaged.
本発明は、電磁波反射層を有するシートを成形金型の凹
型・凸型間に配し、凹型側から金型内に熱可塑性樹脂を
注入し圧縮する射出・圧縮成形により基板を成形すると
ともに、前記シートの賦形及び該シートと基板との接合
一体化を行うことを特徴とするパラボラアンテナの製造
方法である。The present invention involves disposing a sheet having an electromagnetic wave reflecting layer between a concave mold and a convex mold of a mold, and molding a substrate by injection/compression molding in which a thermoplastic resin is injected into the mold from the concave mold side and compressed. This method of manufacturing a parabolic antenna is characterized in that the sheet is shaped and the sheet and the substrate are joined and integrated.
本発明を図面を用いて説明する。The present invention will be explained using the drawings.
第１図は、本発明で使用する電磁波反射層を有するシー
トの構成の一例を示す。電磁波反射層（１）を有するシ
ートαＱは、片面は長時間の屋外暴露に耐えるためにプ
ラスチックの中でもつとも耐候性の優れているポリフッ
化ビニリデン（２）を用いることが好ましい。電磁波反
射層（１）は金型か閉しるときの凸面からの型締め圧力
で延伸されて成形されるため、延伸性に富んだ易成形性
の軟質アルミニウム箔を用いることができる。また、ア
ルミニウムを蒸着したポリエチレンテレフタレート又は
ポリプロピレンを用いることも好ましい。アルミニウム
蒸着膜の厚さは０．１〜１μｍで、このように薄くすれ
ば、金型の凸面からの型締め圧力で十分に成形できるよ
うになる。蒸着膜の支持層としてポリエチレンテレフタ
レート又はポリプロピレンのフィルムを使用するのは大
量に生産され、最も廉価に調達てきるからである。これ
らの樹脂は耐候性が悪く、長時間の屋外暴露に耐えるこ
とができないが、ポリフッ化ビニルの保護フィルムをラ
ミネートすることにより本目的に使用することができる
ようになった。FIG. 1 shows an example of the structure of a sheet having an electromagnetic wave reflecting layer used in the present invention. For the sheet αQ having the electromagnetic wave reflecting layer (1), it is preferable to use polyvinylidene fluoride (2), which has excellent weather resistance among plastics, on one side to withstand long-term outdoor exposure. Since the electromagnetic wave reflecting layer (1) is stretched and molded by the mold clamping pressure from the convex surface when the mold is closed, a soft aluminum foil with high stretchability and easy moldability can be used. It is also preferable to use polyethylene terephthalate or polypropylene on which aluminum is vapor-deposited. The thickness of the aluminum evaporated film is 0.1 to 1 μm, and if it is made this thin, molding can be performed sufficiently with the clamping pressure from the convex surface of the mold. Polyethylene terephthalate or polypropylene films are used as the support layer for the deposited film because they are produced in large quantities and can be procured at the lowest cost. Although these resins have poor weather resistance and cannot withstand long-term outdoor exposure, they can now be used for this purpose by laminating a polyvinyl fluoride protective film.
保護フィルムとして機能するポリフッ化ビニル（２）は
着色するか、あるいは透明なフィルムを使用し、電磁波
反射層に接する面を全面印刷（３）を行うことで、塗装
することなく種々の色彩をもったパラボラアンテナを得
ることがてきる。The polyvinyl fluoride (2) that functions as a protective film can be colored or a transparent film can be used, and the surface in contact with the electromagnetic wave reflective layer can be printed (3) on the entire surface, allowing it to have various colors without painting. You can get a parabolic antenna.
パラボラアンテナの基板となる樹脂は熱可塑性樹脂であ
るが、収縮率が小さいこと、成形時のヒケが小さいこと
、屋外の寒暖の差により変形しないために成形歪みが少
なく、耐熱性か高いこと等の特性を満足する必要がある
。結晶性高分子樹脂は耐熱性は高いが、収縮率が大きく
、本発明に使用するには好ましくない。The resin that serves as the substrate for the parabolic antenna is a thermoplastic resin, which has a low shrinkage rate, small sink marks during molding, does not deform due to differences in outdoor temperature, so there is little molding distortion, and has high heat resistance. It is necessary to satisfy the following characteristics. Although crystalline polymer resins have high heat resistance, they have a large shrinkage rate and are not preferred for use in the present invention.
本発明の目的を達成するには、収縮率が小さく、成形歪
みの少ない無定形高分子樹脂が適当である。In order to achieve the object of the present invention, an amorphous polymer resin with a low shrinkage rate and little molding distortion is suitable.
更に、屋外て高温にさらされたとき変形しないために、
７５℃以上の熱変形温度を有することか必要である。こ
れらを満足するものとして、ＰＰ０ＰＰＥ、ＡＢＳ、Ａ
ＥＳ、 アモルファスオレフィンなと及びこれらを少な
くとも５０％含有するポリマーブレンド樹脂が好ましく
用いられる。Furthermore, to prevent deformation when exposed to high temperatures outdoors,
It is necessary to have a heat distortion temperature of 75°C or higher. PP0PPE, ABS, A
ES, amorphous olefins, and polymer blend resins containing at least 50% of these are preferably used.
次に、前記電磁波反射層を有するシートを使用し射出・
圧縮してパラボラアンテナを成形する。Next, using the sheet having the electromagnetic wave reflecting layer,
Compress and form a parabolic antenna.
第２図は、本発明における金型及び成形機の概略図であ
る。FIG. 2 is a schematic diagram of a mold and a molding machine in the present invention.
電磁波反射層を有するシートαψを金型α２．α３の間
にセットし、熱可塑性樹脂を金型の凹型０３側から注入
するが、通常の射出成形の場合、薄い金型間隙に樹脂を
注入するため６００〜１５００ｋｇ ／ ＣＩ！、の高
圧が必要である。このような高圧で注入すれば前記シー
トが破れ、良好な製品が得られないことか多い。The sheet αψ having the electromagnetic wave reflecting layer is placed in the mold α2. α3 and thermoplastic resin is injected from the concave mold 03 side of the mold, but in the case of normal injection molding, the resin is injected into the thin mold gap, so the weight is 600 to 1500 kg/CI! , high pressure is required. Injecting at such high pressure often causes the sheet to tear, making it impossible to obtain a good product.
この問題を解決するため、樹脂を注入する際は金型間隙
を製品厚みより大きくしておき、樹脂を所定量注入後、
所定の金型間隙まで圧縮成形して所定厚みの製品とする
。To solve this problem, when injecting resin, make the mold gap larger than the product thickness, and after injecting a predetermined amount of resin,
Compression molding is performed to a predetermined mold gap to produce a product with a predetermined thickness.
以上のように、射出・圧縮成形すれば、注入圧力を１０
０ｋｇ／ｃｄ以下に抑えることがてき、前記シートが破
損することなく、樹脂基板と一体成形することができる
。As mentioned above, if injection/compression molding is used, the injection pressure can be reduced to 10
The weight can be suppressed to 0 kg/cd or less, and the sheet can be integrally molded with the resin substrate without being damaged.
成形装置の型締機構は、普通に用いられる横型の場合、
金型間隙を所定より開いた状態で注入すれば、注入され
た樹脂が金型下部に滞留し、金型内への均一な注入はで
きない。この問題を解決するには注入樹脂の金型下部で
の滞留がなく、成形後の歪みも少ない縦型型締機構を採
用するのがよい。The mold clamping mechanism of molding equipment is the horizontal type that is commonly used.
If the resin is injected with the mold gap being wider than a predetermined value, the injected resin will stay at the bottom of the mold, making it impossible to uniformly inject it into the mold. To solve this problem, it is best to adopt a vertical mold clamping mechanism that prevents the injected resin from staying at the bottom of the mold and causes less distortion after molding.
０．５μｍ厚のアルミニウムを蒸着したポリエチレンテ
レフタレートフィルム（１）に、片面全面に青色印刷（
３）を行った０、１５閣の透明なポリフッ化ビニルフィ
ルム（２）を、印刷面をポリエチレンテレフタレートフ
ィルム側にしアクリル樹脂接着剤（４）を介して積層し
、他面にアクリル樹脂接着剤（５）を塗布してラミネー
トフィルムα＠を得た。Blue printing (
The transparent polyvinyl fluoride film (2) of 0 and 15 colors that was subjected to step 3) was laminated with the printed side facing the polyethylene terephthalate film via an acrylic resin adhesive (4), and the other side was laminated with an acrylic resin adhesive (4). 5) was applied to obtain a laminate film α@.
このラミネートフィルムαωをポリフッ化ビニル面を凸
型０２側（上面）にし、２０ｏトン縦型型締機構の金型
内に挿入し、フィルムαωの周囲をクランプａυで固定
した。金型＠、α３はパラボラ型状の凸面を上に、凹面
を下にして取り付けている。型締を始めると、ラミネー
トフィルムを金型α２の凸部で絞りながら賦形する。金
型の間隙が所定製品厚みの２倍になるまで閉じたとき、
射出成形機α９にて溶融混練したＰＰＥを凹型αＪの注
入口ａ４より所定重量注入し、注入完了後、５０ｋｇ／
ａＩｒの圧力で圧縮成形して金型を完全に閉じた。冷却
後、金型より取出し、端面のラミネートフィルムをトリ
ミングして製品とした。This laminate film αω was placed with the polyvinyl fluoride surface on the convex mold 02 side (upper surface), inserted into a mold of a 20-ton vertical mold clamping mechanism, and the periphery of the film αω was fixed with a clamp aυ. The mold @, α3 is installed with the parabolic convex side facing up and the concave side facing down. When mold clamping begins, the laminate film is shaped while being squeezed by the convex portion of the mold α2. When the gap in the mold is closed to twice the specified product thickness,
A predetermined weight of PPE melted and kneaded with an injection molding machine α9 is injected from the injection port a4 of the concave αJ, and after the injection is completed, 50 kg/
Compression molding was performed at a pressure of aIr to completely close the mold. After cooling, it was taken out from the mold and the laminate film on the end surface was trimmed to form a product.
本発明の方法によれば、射出・圧縮成形法を採用するこ
とにより、低圧成形が可能で、電磁波反射層を有するシ
ートと基板とを同時に成形でき、従来のようにアルミニ
ウム箔を事前に予備成形する、あるいは導電塗料を塗布
するなとの工程は必要な（なる。According to the method of the present invention, by employing injection/compression molding, low-pressure molding is possible, and the sheet having an electromagnetic wave reflective layer and the substrate can be molded simultaneously, and aluminum foil can be preformed in advance as in the conventional method. The process of applying conductive paint or applying conductive paint is necessary.
成形装置の型締機構として凹型を下型金型とする縦型型
締機構を採用し、この凹型より基板用の樹脂を注入すれ
ば均一な注入ができる。A vertical mold clamping mechanism with a concave mold as the lower mold is used as the mold clamping mechanism of the molding apparatus, and uniform injection can be achieved by injecting resin for the substrate from this concave mold.
また、電磁波反射層の保護層としてポリフッ化ビニルを
着色するか印刷して使用すれば、仕上塗装なしで、種々
の色彩をもったパラボラアンテナを容易に製造できる。Furthermore, if colored or printed polyvinyl fluoride is used as a protective layer for the electromagnetic wave reflecting layer, parabolic antennas with various colors can be easily manufactured without the need for finishing coating.
このように、従来方法の欠陥であった電磁波反射層の形
成と塗装の作業を完全に省くことが可能となり、工程の
大幅な簡略化が達成される。In this way, it is possible to completely omit the work of forming an electromagnetic wave reflecting layer and painting, which were defects of the conventional method, and the process is greatly simplified.
第１図は本発明に使用する電磁波反射層を有するシート
（ラミネートフィルム）の構成（−例）を示す断面図で
ある。FIG. 1 is a sectional view showing the structure (example) of a sheet (laminate film) having an electromagnetic wave reflecting layer used in the present invention.
第２図は本発明における縦型型締機構を有する金型及び
成形機の概略断面図である。FIG. 2 is a schematic sectional view of a mold and a molding machine having a vertical mold clamping mechanism according to the present invention.
Claims (3)
凸型間に配し、凹型側から金型内に熱可塑性樹脂を注入
して圧縮する射出・圧縮成形により基板を成形するとと
もに、前記シートの賦形及び該シート基板との接合一体
化を行うことを特徴とするパラボラアンテナの製造方法
。(1) Place the sheet with the electromagnetic wave reflecting layer into the concave mold of the mold.
The substrate is molded by injection/compression molding, which is placed between the convex molds and injected into the mold from the concave mold side and compressed, and the sheet is shaped and integrated with the sheet substrate. A method for manufacturing a parabolic antenna characterized by the following.
形する請求項１記載のパラボラアンテナの製造方法。(2) The method for manufacturing a parabolic antenna according to claim 1, wherein injection and compression molding is carried out at a molding pressure of 100 kg/cm^2.
より樹脂を注入する請求項１記載のパラボラアンテナの
製造方法。(3) The method for manufacturing a parabolic antenna according to claim 1, wherein the molding device is a vertical mold clamping mechanism, and the resin is injected from a concave mold that is a lower mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23329590A JPH04113819A (en) | 1990-09-05 | 1990-09-05 | Manufacture of parabola antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23329590A JPH04113819A (en) | 1990-09-05 | 1990-09-05 | Manufacture of parabola antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04113819A true JPH04113819A (en) | 1992-04-15 |
Family
ID=16952868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23329590A Pending JPH04113819A (en) | 1990-09-05 | 1990-09-05 | Manufacture of parabola antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04113819A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06297498A (en) * | 1993-04-13 | 1994-10-25 | Mitsubishi Gas Chem Co Inc | Manufacture of patterned molded form |
| GB2343297A (en) * | 1998-09-01 | 2000-05-03 | Millitech Corp | Method of transflector manufacture |
| KR20020078685A (en) * | 2001-04-07 | 2002-10-19 | 이소피아 | injection method and molding device for printing on rear side |
-
1990
- 1990-09-05 JP JP23329590A patent/JPH04113819A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06297498A (en) * | 1993-04-13 | 1994-10-25 | Mitsubishi Gas Chem Co Inc | Manufacture of patterned molded form |
| GB2343297A (en) * | 1998-09-01 | 2000-05-03 | Millitech Corp | Method of transflector manufacture |
| GB2343297B (en) * | 1998-09-01 | 2001-02-14 | Millitech Corp | Synthetic resin transreflector and method of making same |
| KR20020078685A (en) * | 2001-04-07 | 2002-10-19 | 이소피아 | injection method and molding device for printing on rear side |
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