GB1352374A - Bending a tube of heat-softenable material - Google Patents

Bending a tube of heat-softenable material

Info

Publication number
GB1352374A
GB1352374A GB2194571A GB2194571A GB1352374A GB 1352374 A GB1352374 A GB 1352374A GB 2194571 A GB2194571 A GB 2194571A GB 2194571 A GB2194571 A GB 2194571A GB 1352374 A GB1352374 A GB 1352374A
Authority
GB
United Kingdom
Prior art keywords
tube
heat
bands
see
foil
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
GB2194571A
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.)
Hoogenboom H G
Walraven L D J M
Original Assignee
Hoogenboom H G
Walraven L D J M
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 Hoogenboom H G, Walraven L D J M filed Critical Hoogenboom H G
Publication of GB1352374A publication Critical patent/GB1352374A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L43/00—Bends; Siphons
    • F16L43/008—Bends; Siphons made from plastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
    • B21D9/18—Auxiliary equipment, e.g. machines for filling tubes with sand for heating or cooling of bends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

1352374 Bending tubes L D J M WALRAVEN and H G HOOGENBOOM 19 April 1971 [18 Feb 1970] 21945/71 Heading B5A [Also in Divisions B8 and B6] A plastics tube is bent after applying heat to the tube substantially simultaneously at longitudinally spaced locations thereof between which heat is not applied, the tube thereby being softened at substantially only the spaced locations. The tube is heated by electric heating strips, or by infrared irradiation (4) (see Figs. 1, 2, not reproduced) with the unheated locations protected by bands 33 (Fig. 6), or a spirally wound strip, of polished aluminium foil. The foil bands have uniform or non-uniform width (see also Fig. 7, not reproduced), and may be supported on a sheet, wrapped around the tube and permeable to infrared irradiation. Methods of applying the foil bands are described (see Division B8).
GB2194571A 1970-02-18 1971-04-19 Bending a tube of heat-softenable material Expired GB1352374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7002238A NL7002238A (en) 1970-02-18 1970-02-18

Publications (1)

Publication Number Publication Date
GB1352374A true GB1352374A (en) 1974-05-08

Family

ID=19809362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2194571A Expired GB1352374A (en) 1970-02-18 1971-04-19 Bending a tube of heat-softenable material

Country Status (3)

Country Link
FR (1) FR2080590B3 (en)
GB (1) GB1352374A (en)
NL (1) NL7002238A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249750A (en) * 1990-11-13 1992-05-20 Mckechnie Plastics Ltd Improved method and apparatus for shaping thermoplastic tubes
GB2353965A (en) * 1999-08-27 2001-03-14 Standard Products Co Forming curved extruded members

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249750A (en) * 1990-11-13 1992-05-20 Mckechnie Plastics Ltd Improved method and apparatus for shaping thermoplastic tubes
US5200124A (en) * 1990-11-13 1993-04-06 Mckechnie Plastics Limited Method and apparatus for shaping thermoplastic tubes
GB2249750B (en) * 1990-11-13 1994-09-07 Mckechnie Plastics Ltd Improved method and apparatus for shaping thermoplastic tubes
GB2353965A (en) * 1999-08-27 2001-03-14 Standard Products Co Forming curved extruded members

Also Published As

Publication number Publication date
FR2080590A3 (en) 1971-11-19
FR2080590B3 (en) 1973-10-19
DE2106680B2 (en) 1972-09-28
NL7002238A (en) 1971-08-20
DE2106680A1 (en) 1971-09-16

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees