CA2319901A1 - Method and apparatus for forming bends in thermoplastic pipe - Google Patents
Method and apparatus for forming bends in thermoplastic pipe Download PDFInfo
- Publication number
- CA2319901A1 CA2319901A1 CA002319901A CA2319901A CA2319901A1 CA 2319901 A1 CA2319901 A1 CA 2319901A1 CA 002319901 A CA002319901 A CA 002319901A CA 2319901 A CA2319901 A CA 2319901A CA 2319901 A1 CA2319901 A1 CA 2319901A1
- Authority
- CA
- Canada
- Prior art keywords
- pipe section
- working surface
- pipe
- bend
- radius
- 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
Links
- 238000000034 method Methods 0.000 title abstract 3
- 229920001169 thermoplastic Polymers 0.000 title abstract 2
- 239000004416 thermosoftening plastic Substances 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
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
- B29C53/02—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention provides apparatus and a method for forming a bend in a linear section of thermoplastic pipe. The apparatus comprises an anvil having a concave working surface which defines an arc of at least the bend angle of the bend to be formed in the pipe section and which is transversely arced at a radius essentially the same as the radius of the pipe, the anvil further including a collar for retaining an end of the pipe section adjacent the working surface. The method of the invention comprises the steps of heating the pipe section to the softening temperature thereof, driving a flexible mandrel of substantially the same internal diameter as the pipe and of at least the same length as the pipe section into the pipe section, loading the pipe section and mandrel onto an anvil having a concave working surface which defines an arc of at least the bend angle of the bend to be formed in the pipe section and which is transversely arced at a radius essentially the same as the radius of the pipe, the anvil further including a collar for retaining an end of the pipe section adjacent the working surface, drawing the end of the pipe section opposite the retained end towards the working surface to bring the bulk of the pipe section into contact with the working surface, allowing the pipe section to cool to below the softening temperature while held in contact with the working surface and withdrawing the mandrel from the pipe section.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP2311A AUPP231198A0 (en) | 1998-03-13 | 1998-03-13 | Method and apparatus for forming bends in thermoplastic pipe |
| AU20368/99A AU719690B2 (en) | 1998-03-13 | 1999-03-15 | Method and apparatus for forming bends in thermoplastic pipe |
| GB9915869A GB2351936A (en) | 1998-03-13 | 1999-07-08 | Forming bends in thermoplastic pipe |
| CA002319901A CA2319901C (en) | 1998-03-13 | 2000-09-19 | Method and apparatus for forming bends in thermoplastic pipe |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP2311A AUPP231198A0 (en) | 1998-03-13 | 1998-03-13 | Method and apparatus for forming bends in thermoplastic pipe |
| AU20368/99A AU719690B2 (en) | 1998-03-13 | 1999-03-15 | Method and apparatus for forming bends in thermoplastic pipe |
| GB9915869A GB2351936A (en) | 1998-03-13 | 1999-07-08 | Forming bends in thermoplastic pipe |
| CA002319901A CA2319901C (en) | 1998-03-13 | 2000-09-19 | Method and apparatus for forming bends in thermoplastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2319901A1 true CA2319901A1 (en) | 2002-03-19 |
| CA2319901C CA2319901C (en) | 2007-08-07 |
Family
ID=27422670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002319901A Expired - Lifetime CA2319901C (en) | 1998-03-13 | 2000-09-19 | Method and apparatus for forming bends in thermoplastic pipe |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU719690B2 (en) |
| CA (1) | CA2319901C (en) |
| GB (1) | GB2351936A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922134A (en) * | 1973-12-17 | 1975-11-25 | Robintech Inc | Pipe bending mandrel |
| ZA825769B (en) * | 1981-08-11 | 1983-07-27 | Impala Plastics Pty | Pipe bending |
| GB2315450B (en) * | 1996-07-20 | 2000-10-11 | Mckechnie Plastics Ltd | Improved method and apparatus for shaping thermoplastic tubes |
-
1999
- 1999-03-15 AU AU20368/99A patent/AU719690B2/en not_active Ceased
- 1999-07-08 GB GB9915869A patent/GB2351936A/en not_active Withdrawn
-
2000
- 2000-09-19 CA CA002319901A patent/CA2319901C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB9915869D0 (en) | 1999-09-08 |
| AU719690B2 (en) | 2000-05-18 |
| GB2351936A (en) | 2001-01-17 |
| AU2036899A (en) | 1999-09-23 |
| CA2319901C (en) | 2007-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20200921 |