GB812384A - Improvements in or relating to radar reflectors - Google Patents
Improvements in or relating to radar reflectorsInfo
- 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
Links
- 239000011152 fibreglass Substances 0.000 abstract 5
- 229920005989 resin Polymers 0.000 abstract 5
- 239000011347 resin Substances 0.000 abstract 5
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 230000001413 cellular Effects 0.000 abstract 2
- 229920001225 Polyester resin Polymers 0.000 abstract 1
- 210000003660 Reticulum Anatomy 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 229920002689 polyvinyl acetate Polymers 0.000 abstract 1
- 239000011118 polyvinyl acetate Substances 0.000 abstract 1
- 239000011253 protective coating Substances 0.000 abstract 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 abstract 1
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.
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)
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 |
-
1956
- 1956-03-19 GB GB849556A patent/GB812384A/en not_active Expired
Cited By (2)
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 |
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