EP1143561A1 - Reflektor elektromagnetischer Wellen und Verfahren zu seiner Herstellung - Google Patents

Reflektor elektromagnetischer Wellen und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP1143561A1
EP1143561A1 EP01201226A EP01201226A EP1143561A1 EP 1143561 A1 EP1143561 A1 EP 1143561A1 EP 01201226 A EP01201226 A EP 01201226A EP 01201226 A EP01201226 A EP 01201226A EP 1143561 A1 EP1143561 A1 EP 1143561A1
Authority
EP
European Patent Office
Prior art keywords
network
wires
mold
thermoplastic material
thermoplastic
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
Application number
EP01201226A
Other languages
English (en)
French (fr)
Other versions
EP1143561B1 (de
Inventor
Jacques Trouillet
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.)
Transformation Industrielle De Matieres Plastiques- Stimap Ste
Original Assignee
Transformation Industrielle De Matieres Plastiques- Stimap Ste
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9531664&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1143561(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Transformation Industrielle De Matieres Plastiques- Stimap Ste filed Critical Transformation Industrielle De Matieres Plastiques- Stimap Ste
Publication of EP1143561A1 publication Critical patent/EP1143561A1/de
Application granted granted Critical
Publication of EP1143561B1 publication Critical patent/EP1143561B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/22—Reflecting surfaces; Equivalent structures functioning also as polarisation filter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
    • H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface

Definitions

  • the present invention relates to electromagnetic wave reflectors in an element made of an electrically conductive material, preferably having a convex face which defines a focusing home radio waves. They are most often antennas in the shape of a spherical or parabolic cap, but they can also have any other shape giving focus.
  • thermosetting material which requires tools intended to obtain the desired shape, particularly parabolic.
  • a metallic frame is put in forms manually in the tooling.
  • a piece of material is then introduced in the tool above the frame.
  • the tool is locked.
  • Cooking is carried out in order to polymerize the material introduced.
  • the tool is opened and the part is extracted from the mold. Due to molding technology, deburring must be carried out followed by sanding, removing a primer, then painting on both sides.
  • an antenna comprising a canvas metal coated by thermoplastic resin injection molding.
  • thermoplastic resin injection molding we gives the desired shape to the wire mesh before molding.
  • To conform a metallic fabric in parabola with great accuracy is a very difficult operation to perform.
  • Powder coating painting technologies do not allow not to have a large shade variation, without incurring costs excessive manufacturing due to the need to clean the tool manufacturing when switching from one shade to another.
  • the invention overcomes these drawbacks and makes it possible to obtain a electromagnetic wave reflector protected against corrosion, much more easy to manufacture and which, in particular, allows the possible use of a painting easier and less expensive to implement and therefore to dispense with any painting operation with dusting and operations cleaning that it entails.
  • the network of electrically conductive material can include wires arranged at a distance, preferably constant, the each other.
  • the network is a canvas or a grid, especially flat.
  • the manufacturing is done by injection molding of a material thermoplastic, preferably on a regular mesh grid in one electrically conductive material.
  • the injection is carried out under high pressure, especially above 50 bar and most often between 150 and 450 bar.
  • the network is thus well maintained during molding and curvatures of the network and the coating are not offset, the whole being obtained automatically by the usual molding operation.
  • the coating of the threads is often almost complete and, in any case, takes place on more than 80% of the cross section of the wires.
  • the wire has generally a diameter of 0.005 to 0.5 mm, it being understood that the wires may also have a cross section other than circular and then the values indicated above are understood to mean the largest dimension of cross section.
  • thermoplastic material use may in particular be made of polyethylene, polypropylene or other polyolefins, ABS, polycarbonate, poly (methyl methacrylate) as well as any other material injectable thermoplastic.
  • the thickness of injected plastic is general between 0.5 mm and 1 cm.
  • the distance between the wires is between 0.003 mm and 1.5 cm.
  • the desired color for the antenna is given to it by the fact that the plastic in the mass.
  • the antenna can also be transparent.
  • the invention also relates to a wave reflector electromagnetic including an array of conductive material electricity covered by a sheet of thermoplastic material having a portion central and border, characterized in that in the central part the network appears punctually on one of the faces of the tablecloth, while on part of the border it is embedded in the tablecloth.
  • a flat metallic canvas 1 is retained on one of the two half-molds 2, 3 of a thermoplastic injection mold.
  • Figure 2 shows that when the fabric 1 is pinched between the two half-molds 2, 3, it protrudes from the periphery of the mold cavity 4.
  • FIG. 3 shows the injected part 5 demolded in which is coated with the fabric 1 which protrudes by a part 6.
  • FIG. 4 shows that part 6 has been cut in the form of a drop 6 leaving an antenna parabolic to the shape of the imprint 4 which is formed, as shown Figures 5 and 6, of the canvas 1 coated with a ply 7 of plastic material thermoplastic.
  • the antenna has a central part 8 in the form of parabola and a peripheral border 9.
  • the canvas 1 appears punctually on one of the faces of the web 7, while on at least part of the border 9, the fabric 1 is embedded in the sheet 7.
  • the antenna of Figure 5 was obtained when the direction of the injection current in the mold is directed vertically from bottom to top, while in Figure 6 it was directed vertically from top to bottom.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aerials With Secondary Devices (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
EP01201226A 1998-10-16 1999-10-12 Reflektor elektromagnetischer Wellen und Verfahren zu seiner Herstellung Expired - Lifetime EP1143561B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9813007A FR2784804B1 (fr) 1998-10-16 1998-10-16 Antenne a fils enrobes d'une couche de matiere thermoplastique
FR9813007 1998-10-16
EP99947544A EP1119884A1 (de) 1998-10-16 1999-10-12 Reflektor elektromagnetischer wellen und verfahren zu seiner herstellung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99947544A Division EP1119884A1 (de) 1998-10-16 1999-10-12 Reflektor elektromagnetischer wellen und verfahren zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP1143561A1 true EP1143561A1 (de) 2001-10-10
EP1143561B1 EP1143561B1 (de) 2004-12-29

Family

ID=9531664

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01201226A Expired - Lifetime EP1143561B1 (de) 1998-10-16 1999-10-12 Reflektor elektromagnetischer Wellen und Verfahren zu seiner Herstellung
EP99947544A Pending EP1119884A1 (de) 1998-10-16 1999-10-12 Reflektor elektromagnetischer wellen und verfahren zu seiner herstellung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99947544A Pending EP1119884A1 (de) 1998-10-16 1999-10-12 Reflektor elektromagnetischer wellen und verfahren zu seiner herstellung

Country Status (10)

Country Link
US (1) US6486854B1 (de)
EP (2) EP1143561B1 (de)
JP (1) JP2002528937A (de)
AT (1) ATE286309T1 (de)
AU (1) AU6095299A (de)
BR (1) BR9912233A (de)
CA (1) CA2337810A1 (de)
DE (1) DE69923001T2 (de)
FR (1) FR2784804B1 (de)
WO (1) WO2000024086A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808382B1 (fr) 2000-04-28 2003-07-25 Vector Ind France Antenne parabolique et son procede de fabrication
FR2819641A1 (fr) * 2001-01-18 2002-07-19 Gilles Ribatto Antenne en matiere thermoplastique conductrice
US20110221101A1 (en) * 2010-03-10 2011-09-15 Legare David J Resin-based molding of electrically conductive structures

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2244618A1 (en) * 1973-09-24 1975-04-18 Asea Ab Metal faced injection moulding for refrigerators or cars - with metal deformed to mould surface by injection of plastics
US4030953A (en) * 1976-02-11 1977-06-21 Scala Radio Corporation Method of molding fiberglass reflecting antenna
JPH01227505A (ja) * 1988-03-07 1989-09-11 Mitsuboshi Belting Ltd パラボラアンテナ用反射体の製造方法
DE9001255U1 (de) * 1990-02-03 1990-04-05 Hagenbusch, Günther, 7313 Reichenbach Satellitenempfangsantenne
JPH03173618A (ja) * 1989-12-01 1991-07-26 Dainippon Printing Co Ltd パラボラアンテナ用リフレクターの製造方法
JPH0441216A (ja) * 1990-06-07 1992-02-12 Mikuni Plast Kk パラボラアンテナ射出成形用金型
EP0595418A1 (de) * 1992-10-28 1994-05-04 Di. W.S. PLASTIC S.r.l. Parabolische Reflektorantenne zum Empfang elektromagnetischer Wellen und Verfahren zu ihrer Herstellung
US5473111A (en) * 1992-10-07 1995-12-05 Mitsubishi Denki Kabushiki Kaisha Shielded enclosure for housing electronic components and manufacturing method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL179527C (nl) * 1977-05-20 1986-09-16 Philips Nv Werkwijze en inrichting voor de vervaardiging van een reflektor met een kunststof steunlichaam.
JPS5984497A (ja) * 1982-11-06 1984-05-16 株式会社イナックス 電磁波の遮蔽または反射用ｆｒｐ板
JPS6146099A (ja) * 1984-08-10 1986-03-06 株式会社ブリヂストン 電磁波反射体
US4647329A (en) * 1984-09-27 1987-03-03 Toyo Kasei Kogyo Kabushiki Kaisha Manufacture of parabolic antennas
SE463290B (sv) * 1987-04-24 1990-11-05 Fibo Stoep As Foerfarande foer framstaellning av en produkt omfattande aatminstone tvaa komponenter av metall samt anordning foer genomfoerande av foerfarandet
JPH0180783U (de) * 1987-11-18 1989-05-30
DE3911445A1 (de) * 1989-04-07 1990-10-11 Ring Hans Georg Hohlspiegel zur fokusierung ankommender elektromagnetischer wellen
DE19613541C1 (de) * 1996-04-03 1997-10-02 Deutsche Forsch Luft Raumfahrt Verfahren zum Herstellen eines Antennen-Reflektors aus Faserverbundwerkstoff mit hoher optischer Oberflächengüte
DE19737566C2 (de) * 1997-08-28 2001-04-05 Ebel Gerlach Helga Verfahren zur Herstellung von mit Kunststoffolie beschichteten gewölbten Metallplatten
WO1999028988A2 (en) * 1997-12-04 1999-06-10 Marconi Aerospace Defence Systems, Inc. Metallized fiber mat, and its use as reflective applique in antenna

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2244618A1 (en) * 1973-09-24 1975-04-18 Asea Ab Metal faced injection moulding for refrigerators or cars - with metal deformed to mould surface by injection of plastics
US4030953A (en) * 1976-02-11 1977-06-21 Scala Radio Corporation Method of molding fiberglass reflecting antenna
JPH01227505A (ja) * 1988-03-07 1989-09-11 Mitsuboshi Belting Ltd パラボラアンテナ用反射体の製造方法
JPH03173618A (ja) * 1989-12-01 1991-07-26 Dainippon Printing Co Ltd パラボラアンテナ用リフレクターの製造方法
DE9001255U1 (de) * 1990-02-03 1990-04-05 Hagenbusch, Günther, 7313 Reichenbach Satellitenempfangsantenne
JPH0441216A (ja) * 1990-06-07 1992-02-12 Mikuni Plast Kk パラボラアンテナ射出成形用金型
US5473111A (en) * 1992-10-07 1995-12-05 Mitsubishi Denki Kabushiki Kaisha Shielded enclosure for housing electronic components and manufacturing method thereof
EP0595418A1 (de) * 1992-10-28 1994-05-04 Di. W.S. PLASTIC S.r.l. Parabolische Reflektorantenne zum Empfang elektromagnetischer Wellen und Verfahren zu ihrer Herstellung

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 548 (E - 856) 7 December 1989 (1989-12-07) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 414 (M - 1171) 22 October 1991 (1991-10-22) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 217 (M - 1252) 21 May 1992 (1992-05-21) *

Also Published As

Publication number Publication date
BR9912233A (pt) 2001-04-10
DE69923001D1 (de) 2005-02-03
FR2784804B1 (fr) 2001-06-29
EP1119884A1 (de) 2001-08-01
WO2000024086A1 (fr) 2000-04-27
FR2784804A1 (fr) 2000-04-21
AU6095299A (en) 2000-05-08
JP2002528937A (ja) 2002-09-03
DE69923001T2 (de) 2005-07-21
EP1143561B1 (de) 2004-12-29
ATE286309T1 (de) 2005-01-15
CA2337810A1 (fr) 2000-04-27
US6486854B1 (en) 2002-11-26

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