CA2219461A1 - Apparatus and methods for reducing plastics pipes - Google Patents

Apparatus and methods for reducing plastics pipes

Info

Publication number
CA2219461A1
CA2219461A1 CA002219461A CA2219461A CA2219461A1 CA 2219461 A1 CA2219461 A1 CA 2219461A1 CA 002219461 A CA002219461 A CA 002219461A CA 2219461 A CA2219461 A CA 2219461A CA 2219461 A1 CA2219461 A1 CA 2219461A1
Authority
CA
Canada
Prior art keywords
methods
axes
plastics pipes
rolls
maximum dimension
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
CA002219461A
Other languages
French (fr)
Other versions
CA2219461C (en
Inventor
Raymond Weaver
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.)
Enterprise Managed Services Ltd
Original Assignee
Individual
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
Priority claimed from GBGB9510279.4A external-priority patent/GB9510279D0/en
Application filed by Individual filed Critical Individual
Publication of CA2219461A1 publication Critical patent/CA2219461A1/en
Application granted granted Critical
Publication of CA2219461C publication Critical patent/CA2219461C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • B29C53/16—Straightening or flattening
    • B29C53/20—Straightening or flattening of tubes
    • 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
    • B29C53/086—Bending or folding of tubes or other profiled members bending radially, i.e. deformig the cross-section of the tube
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/343—Lining or sheathing of internal surfaces using tubular layers or sheathings the tubular sheathing having a deformed non-circular cross-section prior to introduction
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene

Landscapes

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

Abstract

Apparatus and a method for producing reduction in width in plastics lining pipes includes at least one pair of reducing rolls through which in use the liner pipe is forced from the upstream thereof, the rolls being disposed and configured to present a roll throat of effective ovality, the percentage of the difference between the maximum dimension normal to the axes of rotation and the maximum dimension parallel to the axes of rotation towards the last dimension is in the range of 5% and 30%.
CA002219461A 1995-05-22 1996-05-21 Apparatus and methods for reducing plastics pipes Expired - Fee Related CA2219461C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9510279.4A GB9510279D0 (en) 1995-05-22 1995-05-22 Apparatus and methods for reducing plastics pipes
GB9510279.4 1995-05-22
PCT/GB1996/001220 WO1996037725A1 (en) 1995-05-22 1996-05-21 Apparatus and methods for reducing plastics pipes

Publications (2)

Publication Number Publication Date
CA2219461A1 true CA2219461A1 (en) 1996-11-28
CA2219461C CA2219461C (en) 2006-10-03

Family

ID=37101769

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002219461A Expired - Fee Related CA2219461C (en) 1995-05-22 1996-05-21 Apparatus and methods for reducing plastics pipes

Country Status (1)

Country Link
CA (1) CA2219461C (en)

Also Published As

Publication number Publication date
CA2219461C (en) 2006-10-03

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20150521