GB778034A - Process for lining metallic tubes with thermoplastic material - Google Patents

Process for lining metallic tubes with thermoplastic material

Info

Publication number
GB778034A
GB778034A GB3189755A GB3189755A GB778034A GB 778034 A GB778034 A GB 778034A GB 3189755 A GB3189755 A GB 3189755A GB 3189755 A GB3189755 A GB 3189755A GB 778034 A GB778034 A GB 778034A
Authority
GB
United Kingdom
Prior art keywords
tube
polyethylene
metallic
pressure
assembly
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
GB3189755A
Inventor
John Albert Leno
Walter Eric Simpson
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3189755A priority Critical patent/GB778034A/en
Priority to BE552389D priority patent/BE552389A/xx
Priority to CH347636D priority patent/CH347636A/en
Publication of GB778034A publication Critical patent/GB778034A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H01P3/13—Hollow waveguides specially adapted for transmission of the TE01 circular-electric mode
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B29C49/26—Lining or labelling inner lining of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
    • H01P11/002—Manufacturing hollow waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/10—Wire waveguides, i.e. with a single solid longitudinal conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/28—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

778,034. Lining metallic tubes. STANDARD TELEPHONES & CABLES, Ltd. Nov. 8, 1955, No. 31897/55. Class 99(2) A process for lining a metallic tube with thermoplastic material comprises the steps of inserting the thermoplastic material in the form of a tube within the metallic tube, forcing the plastic material against the internal surface of the metallic tube by a gaseous medium under pressure within the plastic tube, externally heating the metallic tube and plastic tube assembly with the plastic material forced against the internal surface and cooling the assembly. Such tubes can be used as high frequency electric wave guides. As an example the application of a thin tube of polyethylene 1 to the inner surface of a copper tube 2 is described. The internal surface of the copper tube is treated for example either by vapour degreasing in trichloroethylene followed by acid pickling and a thorough washing in water or by the electrodeposition of a flash coating of cadmium or by the formation of a controlled oxide film. The tube is then dried for 2-3 hours at 110-115‹C. with the inside at a reduced pressure of less than 1 mm. of mercury. The inside of the polyethylene tube and the space between this tube and the copper tube are evacuated to less than 1 mm. of mercury. A dry compressed gas such as nitrogen or air is then applied to the inside of the polyethylene tube. For a polyethylene tube with a wall thickness of 0.0127 cms. the pressure is gradually increased to 0.3515 kgms/sq. cm. The vacuum pump is then disconnected from the tube 11 which is closed by a plug having one end flush with the internal surface of the copper tube. The pressure is then increased to 1.406 kgms./ sq. cm. The heating process is then carried out in a thermostatically controlled air circulating oven and. the pressure of the nitrogen is maintained throughout the heating and cooling. The assembly is placed in a cold oven and the temperature slowly increased to about 130‹C. after 1¢ hours. This temperature is maintained for approximately ¢ hr., after which time the heat is switched off and the assembly allowed to cool. The initial dia. of the polyethylene tube is 5 to 15 per cent less than the internal dia. of the copper tube and the wall thickness of the polyethylene tube is substantially within the range 0.00254 cms. to 0.0254 cms.
GB3189755A 1955-11-08 1955-11-08 Process for lining metallic tubes with thermoplastic material Expired GB778034A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3189755A GB778034A (en) 1955-11-08 1955-11-08 Process for lining metallic tubes with thermoplastic material
BE552389D BE552389A (en) 1955-11-08 1956-11-07
CH347636D CH347636A (en) 1955-11-08 1956-11-08 Method for lining a metal pipe with plastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3189755A GB778034A (en) 1955-11-08 1955-11-08 Process for lining metallic tubes with thermoplastic material

Publications (1)

Publication Number Publication Date
GB778034A true GB778034A (en) 1957-07-03

Family

ID=27259009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3189755A Expired GB778034A (en) 1955-11-08 1955-11-08 Process for lining metallic tubes with thermoplastic material

Country Status (3)

Country Link
BE (1) BE552389A (en)
CH (1) CH347636A (en)
GB (1) GB778034A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171682B (en) * 1961-05-30 1964-06-04 Ultra Kunststoffverarbeitung G Tubular body wound from several layers of a strip-shaped material and lined with a plastic film
DE1221431B (en) * 1958-09-22 1966-07-21 Du Pont Process for applying a thermoplastic coating to the inner surface of an essentially tubular structure
CN105619677A (en) * 2016-03-09 2016-06-01 刘昌林 Molding equipment and molding method for steel-plastic composite pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1221431B (en) * 1958-09-22 1966-07-21 Du Pont Process for applying a thermoplastic coating to the inner surface of an essentially tubular structure
DE1171682B (en) * 1961-05-30 1964-06-04 Ultra Kunststoffverarbeitung G Tubular body wound from several layers of a strip-shaped material and lined with a plastic film
CN105619677A (en) * 2016-03-09 2016-06-01 刘昌林 Molding equipment and molding method for steel-plastic composite pipe

Also Published As

Publication number Publication date
CH347636A (en) 1960-07-15
BE552389A (en) 1957-05-07

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