GB2088320A - Elongate, abrasion-resistant, shaped members of reinforced plastics material, and processes for the production of same - Google Patents
Elongate, abrasion-resistant, shaped members of reinforced plastics material, and processes for the production of same Download PDFInfo
- Publication number
- GB2088320A GB2088320A GB8134731A GB8134731A GB2088320A GB 2088320 A GB2088320 A GB 2088320A GB 8134731 A GB8134731 A GB 8134731A GB 8134731 A GB8134731 A GB 8134731A GB 2088320 A GB2088320 A GB 2088320A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plastics material
- elongate body
- groove
- elongate
- abrasion
- 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
- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000005299 abrasion Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 22
- 239000002990 reinforced plastic Substances 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- 238000004132 cross linking Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 4
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910015900 BF3 Inorganic materials 0.000 description 1
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 239000004959 Rilsan Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
-
- 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
- B29C53/12—Bending or folding helically, e.g. for making springs
-
- 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
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
- B29C53/785—Winding and joining, e.g. winding spirally helically using profiled sheets or strips with reinforcements
-
- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
A hollow elongate body (1) of abrasion-resistant material is wound on a rotating drum (3). The body (1) is of U-shaped cross-section to define a groove (10) which, as the body (1) is wound round the drum (3), is filled with high-strength filaments (11) which have been previously impregnated with a cross-linkable plastics material capable of adhering to the interior of the groove (10). The body (1) passes through an oven (14) to cause cross-linking of the plastics material. Before entering the oven (14), a cover (15a) may be applied to the body (1). To make the product more flexible, adhesion between the plastics material and the surface of the groove (10) can be prevented, e.g. by coating the interior of the groove (10) with an anti-adhesion substance. <IMAGE>
Description
SPECIFICATION
Elongate abrasion-resistant shaped members of reinforced plastics material and processes for the production of same
The present invention relates to elongate, abrasion-resistant shaped members of reinforced plastics material, and processes for the production of same.
Elongate, helically wound, abrasion-resistant shaped members of reinforced plastics material are used particularly but not exclusively for producing light, high-strength tubes. French
Patent No. 2 312 356, for example, proposes the production of a shaped member of reinforced plastics material by intrdducing a mixture of filaments and cross-linkable plastics material into an elongate, mould-forming groove which winds around the surface of a drum, the shaped member being extracted from the groove after a heat treatment.
When tubes produced with shaped members of the above-indicated type were subjected to bending fatigue tests, it was found that there was substantial abrasion of different layers which were formed by the production process, which abrasion phenomena can result in a need prematurely to take the tubes out of services.
It is possible to envisage overcoming that disadvantage by sheathing the shaped member with an anti-abrasion coating, after the production thereof. However, such a process requires an additional, expensive operation in production of the shaped member.
It will be appreciated that it is possible to use an adhesive in order to cause the shaped member to adhere to the coating, but that also requires an additional operation, as well as the purchase of an adhesive which is compatible on the one hand with the material forming the shaped member and on the other hand with the material forming the anti-abrasion coating.
A process embodying the present invention and described hereinbelow, for producing an elongate, helically wound shaped member of reinforced plastics material, overcomes or at least reduces the effect of such disadvantages by using, as the mould, a constituent element of the shaped member, in the form of an elongate body made of an abrasion-resistant material, in which there is provided a longitudinal groove for receiving a mixture of high-strength filaments and crosslinkable plastics material, said elongate body when thus provided with said mixture being subjected to a treatment capable of cross-linking said plastics material, optionally after the plastics material has been covered with a cover-forming element.
According to the present invention there is provided a process for the production of an elongate, helically wound, abrasion-resistant shaped member of reinforced plastics material, wherein an elongate body of substantially Ushaped cross-section and the outside surface of which is resistant to abrasion is wound in a helical configuration around a mandrel while a groove defined by said body is filled with a mixture of high-strength filaments and cross-linkable plastics by way of the open U-section of the elongate body. and a product formed by the elongate body and the filling thereof is separated from the surface of the mandrel after having been subjected to a treatment capable of causing cross-linking of said plastics material.
Depending on the use envisaged, the groove in the helically wound elongate body can be filled with a plastics material which adheres to the internal wall surface of the groove or, conversely, the wall surface of the groove can be covered with an anti-adhesion substance before the groove is filled with the mixture of filaments and crosslinkable plastics material, which will increase the degree of flexibility while permitting the core portion of filament-reinforced plastics material to move longitudinally with respect to the elongate, mould-forming body in which said core is housed.
In comparison with a process using the mode of operation described in French Patent No.
2312 356, wherein the shaped member would be covered with an anti-abrasion coating before being removed from the mould, the process embodying the invention and described hereinbelow has the advantage of eliminating the operations of removing the shaped member from a mould, and cleaning and recycling of the mould groove.
Another advantage of the process embodying the invention described below, and this is not the least advantage, is that it eliminates the problem of machines being fouled by glass powder, which problem is frequently encountered when using the prior art processes for producing articles, for example flexible tubes, using shaped members with a high proportion of glass fibres. In fact, if the below-described process embodying the invention is used, the core of the shaped member, which is of glass fibre-reinforced plastics material, remains constantly sheathed with anti-abrasion material in the course of the production operation, and it is only that material which comes into contact with the machinery.
The invention also provides an elongate, abrasion-resistant shaped member of reinforced plastics material comprising an elongate body containing a core of moulded, cross-linked, filament-reinforced plastics material, wherein the elongate body is of substantially U-shaped crosssection, the outside surface of said body being resistant to abrasion and forming a groove containing said core.
The invention will now be further described, by way of illustrative and non-limiting example, with
reference to the accompanying drawing, in which:
Figure 1 is a diagrammatic view of a process embodying the invention;
Figure 2 is a view in cross-section of a detail of a shaped member embodying the invention; and
Figure 3 shows a self-hooking shaped member
constituting another embodiment of the invention.
Referring to the drawings, reference numeral 1
denotes a hollow elongate body or member of abrasion-resistant material, which is for example stored on a reel 2 from which it is unwound to be wound onto a drum or mandrel 3.
A helicoidal winding which is formed in that way progresses axially by sliding along the surface of the drain or mandrel 3, being pushed by a helicoidal ramp 16 which is disposed at the beginning of the region in which the body 1 is wound onto the mandrel, the ramp 16 remaining fixed while the mandrel rotates.
A shaft 3a of the drum or mandrel 3 is connected to drive means for rotating the drum or mandrel, the drive means comprising for example a chain 4 engaging around a toothed pinion 5 which is fixed on the shaft 3a.
The shaft 3a is supported by a bearing arrangement 6 by means of roller bearing assemblies, the bearing arrangement 6 being fixed with respect to a chassis 7.
Between the storage reel 2 and the mandrel 3, the hollow elongate body 1 passes between guide rollers 8 and tensioning rollers 9.
The body 1 has a longitudinal groove 10 which, as the body 1 is wound around the drum 3, serves as a mould which is filled with high-strength filaments or rovings 11 which have been previously impregnated with a cross-linkable plastics material which is capable of adhering to the internal wall surface of the groove 1 0 and to the filaments 11, that mixture forming a core portion 13 of an elongate helically wound shaped member.
When the elongate body 1 has thus been provided with the above-mentioned mixture of filaments 11 and plastics material, the elongate body 1 then passes into an oven 14 in which it is subjected to a heat treatment capable of causing cross-linking of the reinforced plastics material that it includes.
The oven 14 is supplied with energy by any suitable means, for example by a cable 1 4a if it uses an electrical heating means.
Before passing into the oven 14, the elongate body 1 which serves as a mould may optionally be covered by a cover-forming element 15 or 1 spa.
The cover element may comprise a strip 1 5 of plastics material (see Figure 3) or, as shown in
Figures 1 and 2, a shaped element 1 5a having a cross-section which is so designed as to permit it to be interlocked onto the elongate body 1 before the heat treatment is carried out in the oven 14. A roller 12 presses the element 1 5a onto the hollow body 1 to produce the interlocking connection.
As shown in Figure 3, the hollow elongate body 1 may be of such a cross-section as to permit the body 1 to have a self-locking action, for example to form tubes by helical winding of the shaped member with adjacent turns of the shaped member being hooked into each other.
By way of non-limiting example, a hollow elongate body 1 was produced with a groove 10 forming a mould of rectangular cross-section, measuring 7 mm x 5 mm, and with a wall thickness of 1 millimeter. The hollow elongate body 1 had been produced from polyamide 11 (Rilsan) by a conventional extrusion process.
The groove 10 was filled with a mixture comprising 70 parts by weight of continuous roves of untwisted uni-directional glass fibres and 30 parts by weight of epoxy resin of bis-phenol A diglycidylether type, to which a complex of boron trifluoride and monoethylamine was added in a proportion of 2 parts by weight for 100 parts of resin.
After the groove 10 had been filled with a sufficient number of impregnated roves, there was placed thereon an element 1 5 in the form of a strip which was 9 millimetres in width and 1 millimetre in thickness all along a central band portion which was 7 millimetres in width and formed the cover in the true sense.
After passing through the oven 14, the finished product left the mandrel 3 and the resulting spiral could be used to produce a light flexible conduit which had good resistance to fatigue when subjected to alternate bending tests.
For some uses, in particular the production of tubes with a high degree of flexibility, it is possible to prevent adhesion between the core 13 of reinforced plastics material and the surface of the groove 10 so that the core 13 can be displaced longitudinally with respect to the elongate body 1 instead of forming therewith a unitary assembly with a lower degree of flexibility.
For that purpose the wall surface of the groove 10 may be covered with an anti-adhesion substance such as a mould removal agent of a type which is generally used in the plastics material industry, before the groove is provided with the mixture of filaments and cross-linkable plastics material.
Claims (15)
1. A process for the production of an elongate, helically wound, abrasion-resistant shaped member of reinforced plastics material, wherein an elongate body of substantially U-shaped crosssection and the outside surface of which is resistant to abrasion -is wound in a helical configuration around a mandrel while a groove defined by said body is filled with a mixture of high-strength filaments and cross-linkable plastics by way of the open U-section of the elongate body, and a product formed by the elongate body and the filling thereof is separated from the surface of the mandrel after having been subjected to a treatment capable of causing cross-linking of said plastics material.
2. A process according to claim 1, wherein the mandrel is rotated and the helically wound elongate body is advanced by a sliding movement along the surface of the mandrel, wherein the filled elongate body is passed through an oven as it is moved along the mandrel, and wherein the filled elongate body is separated from the mandrel when it leaves the oven.
3. A process according to claim 1 or claim 2, wherein, after the groove of the elongate body has been filled with said mixture, the elongate body is covered by a cover-forming element prior to said treatment.
4. A process according to claim 3, wherein the cover-forming element is a strip of plastics material.
5. A process according to claim 3, wherein the cover-forming element is of a cross-section capable of permitting it to be interlocked into the elongate body before said treatment.
6. A process according to any one of the preceding claims, wherein the groove in the elongate body is filled with a plastics material which is capable of adhering to the internal surface of the groove.
7. A process according to any one of the preceding claims, wherein the internal surface of the groove is covered with an anti-adhesion substance before the groove is filled with said filaments and said plastics material.
8. A process for the production of an elongate, helically wound, abrasion-resistant shaped member of reinforced plastics material, the process being substantially as herein described with reference to Figures 1 and 2 or Figure 3 of the accompanying drawings.
9. An elongate, abrasion-resistant shaped member of reinforced plastics material comprising an elongate body containing a core of moulded, cross-linked, filament-reinforced plastics material, wherein the elongate body is of substantially Ushaped cross-section, the outside surface of said body being resistant to abrasion and forming a groove containing said core.
10. A member according to claim 9, wherein the elongate body is of a cross-section which is designed for self-hooking of the elongate body.
1 A member according to claim 9 or claim 10, wherein a core of moulded, cross-linked, filament-reinforced plastics material adheres to the elongate body.
12. A member according to claim 9 or claim 10, wherein the core of moulded, cross-linked, filament-reinforced plastics material can move longitudinally with respect to the elongate body which contains the core.
13. A member according to any one of claims 9 to 12, wherein a cover-forming element covers said groove.
14. A member according to claim 13, wherein the cover-forming element engages into said groove.
15. An elongate, abrasion-resistant shaped member of reinforced plastics material, the member being substantially as herein described with reference to Figure 2 or Figure 3 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8024500A FR2494401A1 (en) | 1980-11-18 | 1980-11-18 | METHOD FOR MANUFACTURING AN EXTENDED PROFILE OF ARMORED PLASTIC MATERIAL CAPABLE OF RESISTING ABRASION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2088320A true GB2088320A (en) | 1982-06-09 |
| GB2088320B GB2088320B (en) | 1984-07-18 |
Family
ID=9248109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8134731A Expired GB2088320B (en) | 1980-11-18 | 1981-11-18 | Elongate abrasion-resistant shaped members of reinforced plastics material and processes for the production of same |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE891127A (en) |
| ES (2) | ES507223A0 (en) |
| FR (1) | FR2494401A1 (en) |
| GB (1) | GB2088320B (en) |
| IT (1) | IT1139761B (en) |
| NL (1) | NL194074C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616376A1 (en) * | 1987-06-15 | 1988-12-16 | Inst Francais Du Petrole | METHOD AND APPARATUS FOR CONTINUOUSLY MANUFACTURING ARTISED STABILIZABLE MATERIAL SECTION BODIES USING A CHUCK AND A SUPPORT |
| US5061338A (en) * | 1989-02-02 | 1991-10-29 | Institut Francais Du Petrole | Device for manufacturing curved strips including a barrel cam for discontinuous displacement of the curved strips |
| US5064491A (en) * | 1986-04-08 | 1991-11-12 | Institut Francais Du Petrole | Processes for the manufacture of curved reinforcing elements |
| US5151281A (en) * | 1987-11-09 | 1992-09-29 | Institut Francais Du Petrole | Device for continuous manufacture of bent rods with shaped cross sections using an intermediate strip |
| US5225019A (en) * | 1986-04-08 | 1993-07-06 | Institut Francais Du Petrole | Device for the manufacture and installation of reinforcing sheets and curved reinforcing elements composed of a plurality of bars for flexible elongated bodies |
| US5389424A (en) * | 1986-04-08 | 1995-02-14 | Institut Francais Du Petrole | Antiabrasion curved shape and process for its manufacture |
| GB2280889A (en) * | 1993-08-12 | 1995-02-15 | Royal Ordnance Plc | Hollow elongated or tubular bodies and their manufacture |
| US5837083A (en) * | 1993-08-12 | 1998-11-17 | Booth; John Peter | Method of forming a rigid tubular body |
| US7971610B2 (en) | 2004-07-02 | 2011-07-05 | Iti Scotland Limited | Tubular bodies and methods of forming same |
| WO2012076017A1 (en) * | 2010-12-08 | 2012-06-14 | Nkt Flexibles I/S | A method of producing a curved, elongate fiber reinforced polymer element, a method of producing a flexible pipe and a flexible pipe comprising a curved, elongate fiber reinforced polymer element |
| WO2012090184A3 (en) * | 2010-12-31 | 2012-10-26 | Szagru Sp. Z O.O. | Method of manufacturing a pipe from thermoplastic material, and strip of thermoplastic material for manufacturing a pipe |
| CN106764126A (en) * | 2017-01-25 | 2017-05-31 | 高其容 | A kind of HDPE hollow walls wound drain pipe production equipment and method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2596696B1 (en) * | 1986-04-08 | 1988-08-26 | Inst Francais Du Petrole | FLEXIBLE EXTENSION BODY COMPRISING AT LEAST ONE PROFILE HANGER REINFORCED WITH MULTIPLE REINFORCED BARS |
| FR2596695B1 (en) * | 1986-04-08 | 1989-02-17 | Inst Francais Du Petrole | PROCESS AND DEVICE FOR THE MANUFACTURE OF HANGED BARS PROFILED IN REINFORCED PLASTIC MATERIAL |
| FR2763380B1 (en) | 1997-05-16 | 1999-06-18 | Coflexip | ELONGATE PROFILE ELEMENT CAPABLE OF CHANGING CURVATURE AND METHOD OF MANUFACTURING THE SAME |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1504491A1 (en) * | 1964-10-05 | 1970-04-30 | Koppers Co Inc | Method and device for the production of molded parts from bonded fibrous materials |
| US3674581A (en) * | 1969-04-01 | 1972-07-04 | Celanese Corp | Production of fiber reinforced composites |
| JPS5424439B1 (en) * | 1969-04-30 | 1979-08-21 | ||
| US3811478A (en) * | 1969-10-29 | 1974-05-21 | S Ahlqvist | Tube wall |
| US3821050A (en) * | 1970-01-14 | 1974-06-28 | Dunlap Co Ltd | Flexible hose |
| US4038018A (en) * | 1976-06-21 | 1977-07-26 | Fmc Corporation | Apparatus for molding of filament-reinforced plastic rods |
| DE2722928C2 (en) * | 1977-05-20 | 1983-01-05 | Hans Grohe Gmbh & Co Kg, 7622 Schiltach | Flexible plastic hose |
| US4209043A (en) * | 1977-10-18 | 1980-06-24 | Rib Loc (Hong Kong) Ltd. | Plastic tubular objects |
-
1980
- 1980-11-18 FR FR8024500A patent/FR2494401A1/en active Granted
-
1981
- 1981-11-16 IT IT25099/81A patent/IT1139761B/en active
- 1981-11-16 NL NL8105178A patent/NL194074C/en not_active IP Right Cessation
- 1981-11-16 BE BE1/10355A patent/BE891127A/en not_active IP Right Cessation
- 1981-11-17 ES ES507223A patent/ES507223A0/en active Granted
- 1981-11-18 GB GB8134731A patent/GB2088320B/en not_active Expired
-
1982
- 1982-11-11 ES ES1982268452U patent/ES268452Y/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389424A (en) * | 1986-04-08 | 1995-02-14 | Institut Francais Du Petrole | Antiabrasion curved shape and process for its manufacture |
| US5064491A (en) * | 1986-04-08 | 1991-11-12 | Institut Francais Du Petrole | Processes for the manufacture of curved reinforcing elements |
| US5225019A (en) * | 1986-04-08 | 1993-07-06 | Institut Francais Du Petrole | Device for the manufacture and installation of reinforcing sheets and curved reinforcing elements composed of a plurality of bars for flexible elongated bodies |
| EP0299814A1 (en) * | 1987-06-15 | 1989-01-18 | Institut Français du Pétrole | Method and apparatus for continuously manufacturing profiled bodies of stabilizable material by means of a mandrel and a support |
| US4904176A (en) * | 1987-06-15 | 1990-02-27 | Institut Francais Du Petrole | Device for continuously producing reinforced stabilizable profiled bodies by a mandrel and a support |
| FR2616376A1 (en) * | 1987-06-15 | 1988-12-16 | Inst Francais Du Petrole | METHOD AND APPARATUS FOR CONTINUOUSLY MANUFACTURING ARTISED STABILIZABLE MATERIAL SECTION BODIES USING A CHUCK AND A SUPPORT |
| US5151281A (en) * | 1987-11-09 | 1992-09-29 | Institut Francais Du Petrole | Device for continuous manufacture of bent rods with shaped cross sections using an intermediate strip |
| US5061338A (en) * | 1989-02-02 | 1991-10-29 | Institut Francais Du Petrole | Device for manufacturing curved strips including a barrel cam for discontinuous displacement of the curved strips |
| GB2280889A (en) * | 1993-08-12 | 1995-02-15 | Royal Ordnance Plc | Hollow elongated or tubular bodies and their manufacture |
| GB2280889B (en) * | 1993-08-12 | 1998-04-01 | Royal Ordnance Plc | Hollow elongated or tubular bodies and their manufacture |
| US5837083A (en) * | 1993-08-12 | 1998-11-17 | Booth; John Peter | Method of forming a rigid tubular body |
| US7971610B2 (en) | 2004-07-02 | 2011-07-05 | Iti Scotland Limited | Tubular bodies and methods of forming same |
| WO2012076017A1 (en) * | 2010-12-08 | 2012-06-14 | Nkt Flexibles I/S | A method of producing a curved, elongate fiber reinforced polymer element, a method of producing a flexible pipe and a flexible pipe comprising a curved, elongate fiber reinforced polymer element |
| WO2012090184A3 (en) * | 2010-12-31 | 2012-10-26 | Szagru Sp. Z O.O. | Method of manufacturing a pipe from thermoplastic material, and strip of thermoplastic material for manufacturing a pipe |
| CN106764126A (en) * | 2017-01-25 | 2017-05-31 | 高其容 | A kind of HDPE hollow walls wound drain pipe production equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| ES268452Y (en) | 1983-12-16 |
| NL8105178A (en) | 1982-06-16 |
| GB2088320B (en) | 1984-07-18 |
| IT1139761B (en) | 1986-09-24 |
| ES8305906A1 (en) | 1983-04-16 |
| ES507223A0 (en) | 1983-04-16 |
| ES268452U (en) | 1983-06-16 |
| IT8125099A0 (en) | 1981-11-16 |
| FR2494401B1 (en) | 1984-04-20 |
| BE891127A (en) | 1982-05-17 |
| NL194074C (en) | 2001-06-05 |
| FR2494401A1 (en) | 1982-05-21 |
| NL194074B (en) | 2001-02-01 |
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| Publication | Publication Date | Title |
|---|---|---|
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20001118 |