JPS5789923A - Manufacture of resin coated metal tube - Google Patents
Manufacture of resin coated metal tubeInfo
- Publication number
- JPS5789923A JPS5789923A JP15453580A JP15453580A JPS5789923A JP S5789923 A JPS5789923 A JP S5789923A JP 15453580 A JP15453580 A JP 15453580A JP 15453580 A JP15453580 A JP 15453580A JP S5789923 A JPS5789923 A JP S5789923A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- metal tube
- crosslinking agent
- decomposition temperature
- heating
- 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.)
- Pending
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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
- B29C63/048—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like specially adapted for articles having local protrusions, e.g. tubes having a bead weld
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
PURPOSE:To make the covering of uniform thickness on a metal tube having a bead, by extrusion-covering thermoplastic resin incorporated with crosslinking agent on the revolving and proceeding preheated metal tube at the temperature lower than the decomposition temperature of said crosslinking agent, thereafter heating the covered resin above said decomposition temperature and pressing it by rolls. CONSTITUTION:An extruder 3 is arranged obliquely to and toward the proceeding direction of a metal tube 1, and it extrudes molten resin 8 from the flat die 7 at its tip. The resin 8 is wound helically on the outer periphery of the metal tube 1 which revolves and moves. Said resin is incorporated with crosslinking agent and melt-extruded below the decomposition temperature of crosslinking agent and thereafter the resin 8 is heated above the decomposition temperature of crosslinking agent through the heater 9. After heating the pressing roll 10 pushes the resin 8 on the tube surface and further the resin 8 is also pressed during movement by the conveying rolls. However, because the resin 8 is already crosslinked by said heating, the reduction of the covering thickness at the bead part is slight, even though the tube has the bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15453580A JPS5789923A (en) | 1980-10-31 | 1980-10-31 | Manufacture of resin coated metal tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15453580A JPS5789923A (en) | 1980-10-31 | 1980-10-31 | Manufacture of resin coated metal tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5789923A true JPS5789923A (en) | 1982-06-04 |
Family
ID=15586375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15453580A Pending JPS5789923A (en) | 1980-10-31 | 1980-10-31 | Manufacture of resin coated metal tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5789923A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4946528A (en) * | 1987-11-18 | 1990-08-07 | Kawasaki Steel Corporation | Method and equipment for producing protective-coated steel pipe |
| EP2535629A1 (en) * | 2006-12-14 | 2012-12-19 | Saipem S.p.A. | Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus |
| CN104669669A (en) * | 2013-12-01 | 2015-06-03 | 天津中杰科技发展有限公司 | Step slot screen pipe extrusion machine tool |
-
1980
- 1980-10-31 JP JP15453580A patent/JPS5789923A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4946528A (en) * | 1987-11-18 | 1990-08-07 | Kawasaki Steel Corporation | Method and equipment for producing protective-coated steel pipe |
| EP2535629A1 (en) * | 2006-12-14 | 2012-12-19 | Saipem S.p.A. | Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel comprising such an apparatus |
| CN104669669A (en) * | 2013-12-01 | 2015-06-03 | 天津中杰科技发展有限公司 | Step slot screen pipe extrusion machine tool |
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