GB812384A - Improvements in or relating to radar reflectors - Google Patents

Improvements in or relating to radar reflectors

Info

Publication number
GB812384A
GB812384A GB849556A GB849556A GB812384A GB 812384 A GB812384 A GB 812384A GB 849556 A GB849556 A GB 849556A GB 849556 A GB849556 A GB 849556A GB 812384 A GB812384 A GB 812384A
Authority
GB
United Kingdom
Prior art keywords
layer
fibreglass
resin
flange
reflector
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
Application number
GB849556A
Inventor
Milton Brucker
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.)
Zenith Plastics Co
Original Assignee
Zenith Plastics Co
Filing date
Publication date
Priority to US294632A priority Critical patent/US2747180A/en
Application filed by Zenith Plastics Co filed Critical Zenith Plastics Co
Priority to DEZ5870A priority patent/DE1061840B/en
Publication of GB812384A publication Critical patent/GB812384A/en
Expired legal-status Critical Current

Links

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
    • H01Q15/141—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
    • H01Q15/144—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface with a honeycomb, cellular or foamed sandwich structure
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00—Producing hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D24/00—Producing articles with hollow walls
    • B29D24/002—Producing articles with hollow walls formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled
    • B29D24/005—Producing articles with hollow walls formed with structures, e.g. cores placed between two plates or sheets, e.g. partially filled the structure having joined ribs, e.g. honeycomb
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Laminated Bodies (AREA)

Abstract

812,384. Moulding radar reflectors. ZENITH PLASTICS CO. March, 19, 1956, No. 8495/56. Class 87(2). [Also in Groups VIII and XL(c)] A radio reflector comprises a generally dish shaped structure including a metal layer intimately associated with a rigid cellular backing. In one method of constructing the reflector a mould 10, having a base 11 and an annular flange 14, is coated with an unsaturated polyester resin and a layer of fibreglass cloth impregnated with the resin laid over the convex surface and down to the flange. This layer which provides a protective coating for the finished metal reflector when in use, may be ten thousandths of an inch thick and is then cured. Next the outer surface is sandblasted and a layer of metal (e.g. aluminium) 17 sprayed over it. After this the metallic layer is covered with a further layer of resin impregnated fibreglass 18 and a honeycomb cellular core 19 made of woven fibreglass impregnated with resin, added. To complete the assembly further layers of resin impregnated fibreglass 20 are applied. A porous tube 23, for example a spiral coil spring, is then laid round the flange in the position shown and a flexible bag 21 of polyvinyl acetate placed over the structure and sealed round the edges of the flange 25 as by zinc chromate. Suction is applied to the tube 23 sufficient to cause the structure to be subjected to a pressure of nine pounds. per square inch and the outer surface of the bag brushed, rubbed or rolled to remove air pockets. Whilst the internal pressure is still reduced curing is effected either in an oven or by ultra-violet light. After the curing the reflector is separated from the mould and the bag 12 ; its edges are trimmed and then capped with two layers of resin impregnated fibreglass which are finally cured.
GB849556A 1952-06-20 1956-03-19 Improvements in or relating to radar reflectors Expired GB812384A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US294632A US2747180A (en) 1952-06-20 1952-06-20 Radar reflector
DEZ5870A DE1061840B (en) 1956-03-19 1956-11-16 Method of manufacturing a reflector for electromagnetic waves

Publications (1)

Publication Number Publication Date
GB812384A true GB812384A (en) 1959-04-22

Family

ID=1629363

Family Applications (1)

Application Number Title Priority Date Filing Date
GB849556A Expired GB812384A (en) 1952-06-20 1956-03-19 Improvements in or relating to radar reflectors

Country Status (1)

Country Link
GB (1) GB812384A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106984478A (en) * 2017-03-29 2017-07-28 王文潮 A kind of production technology and corollary equipment for being used to control copper-clad plate gummosis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106984478A (en) * 2017-03-29 2017-07-28 王文潮 A kind of production technology and corollary equipment for being used to control copper-clad plate gummosis
CN106984478B (en) * 2017-03-29 2022-12-06 王文潮 Production process and matched equipment for controlling glue flowing of copper-clad plate

Similar Documents

Publication Publication Date Title
US2805974A (en) Method of making radar reflector
US2747180A (en) Radar reflector
US3916418A (en) Fiber-reinforced molded reflector with metallic reflecting layer
US4251476A (en) Manufacture of ornamental vehicle wheels
US3031194A (en) Golf ball structure
US2755216A (en) Process for forming a multi-ducted shell
US3129014A (en) Fuel cells and manufacture thereof
US4556529A (en) Method for bonding molded components sheeting or shaped members
US3607584A (en) Laminated lightweight refelctor structures
US4296155A (en) Overcoated decorative moulding
CN106956447A (en) A kind of slim silicon rubber-fabric joint product and its molding sulfidization molding technique
US2741014A (en) Roller
GB812384A (en) Improvements in or relating to radar reflectors
JPS54152076A (en) Production of plastic molded products with metal thin layer
US3855027A (en) On-site fabrication of antennas
US3112221A (en) Electro-magnetic wave reflecting laminate and method of making it
FR2271024A1 (en) Fibre-reinforced, synthetic-resin-impregnated hollow bodies - by winding layers around mandrel forming part of finished body
US2962802A (en) Method of applying a wire to the surface of a body along a given pattern
JPS5621914A (en) Sun visor for car
GB977654A (en) Improvements in or relating to non-implosive glass vacuum vessels
GB814976A (en) Improvements in and relating to radio aerials
JPS57136808A (en) Reflector of electromagnetic wave
CN220095758U (en) Layering structure of radar reflector
FR2353150A1 (en) Transformer unit for lighting or driving force - with prefabricated moulded monobloc casing
GB1232381A (en)