CN101387359A - Production process of inner plastic layer of steel-plastic composite pipe - Google Patents
Production process of inner plastic layer of steel-plastic composite pipe Download PDFInfo
- Publication number
- CN101387359A CN101387359A CNA2008101957895A CN200810195789A CN101387359A CN 101387359 A CN101387359 A CN 101387359A CN A2008101957895 A CNA2008101957895 A CN A2008101957895A CN 200810195789 A CN200810195789 A CN 200810195789A CN 101387359 A CN101387359 A CN 101387359A
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- plastic
- steel pipe
- pipe
- steel
- plastic tube
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- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a process for producing an inner plastic layer of a steel-plastic composite pipe, which relates to the process for producing pipes, in particular to the process for producing the inner plastic layer of the steel-plastic composite pipe. The process comprises the following steps: using an extruder to evenly coat a market hot melt adhesive on the outer surface of the plastic pipe through a co-extrusion die; pulling the plastic pipe into a steel pipe by a special mechanical arm; fixing the steel pipe after derusting treatment or surface galvanization on a processing platform; penetrating the special mechanical arm from one end of the steel pipe to the other end of the steel pipe so as to clamp the plastic pipe; inflating the plastic pipe from the other end of the steel pipe, and heating up the steel pipe of a built-in plastic pipe by a heating apparatus; and cooling and shaping the steel pipe of the built-in plastic pipe into the steel-plastic composite pipe. The process improves the product quality of the steel-plastic composite pipe, simplifies the production process and reduces the production cost.
Description
Technical field:
The present invention relates to a kind of production technology of pipe, be specifically related to a kind of production technology of forming internal plastic layer of composite steel-plastic pipe.
Background technique:
Lining inner surface of tubes with plastics layer production technology mainly adopts the present plastic tube outer surface of manual method gluing at present, then that outer diameter is little than steel pipe inner diameter plastic tube is drawn in the steel pipe, feed steam at the plastic tube internal layer, make steel pipe layer and plastic layer bonding, replant technology since the outer diameter of plastic tube less than the inner diameter of steel pipe, and vapor (steam) temperature is low, the tackiness agent fusion temperature is not enough, steel pipe layer and plastic layer are easy to generate the space, the plastic layer aliquation that comes off easily.Because the unreasonable quality that has a strong impact on steel-plastic composite pipe of production technology.
Summary of the invention:
The purpose of this invention is to provide a kind of production process of inner plastic layer of steel-plastic composite pipe, the production technology that it can provide a kind of technology more to become rational forming internal plastic layer of composite steel-plastic pipe, advantages such as it has, and technology is simple, steel pipe layer and plastic layer voidlessness, plastic layer difficult drop-off.In order to solve the existing problem of background technique, the present invention adopts following process step:
1, with extruder plastic tube is coated in the outer surface of plastic tube by co-extruding mould equably with commercially available hot melt adhesive, and makes the outer diameter of plastic tube be slightly larger than the inner diameter of steel pipe;
2, will be fixed on through the steel pipe of processing of rust removing or plating zinc on surface on the working station, and special manipulator be worn to the other end in an end of steel pipe, and plastic tube is blocked;
3, special manipulator is drawn in plastic tube in the steel pipe, and this moment, the plastic tube caliber diminished because tension, in be stuck in the steel pipe;
4, one end of the plastic tube in the steel pipe is stopped up, in plastic tube, be inflated to pressure 2-6kg/cm from the other end
2
5, the steel pipe with the built-in plastic tube of above-mentioned steps 4 heats by heating plant, and steel pipe laminar surface temperature reaches 210-260 degree centigrade, makes the plastic pipe layer and the steel pipe layer that scribble hot melt adhesive be bonded as one;
6, the steel pipe cooling and shaping of the built-in plastic tube of above-mentioned steps 5 is made steel-plastic composite pipe.
Compared with prior art, the present invention has the following advantages: the outer diameter of plastic tube is slightly larger than the inner diameter of steel pipe, plastic tube is drawn in the steel pipe, this moment is because tension, the plastic tube caliber diminishes, in be stuck in the steel pipe, making between steel pipe layer and the plastic layer not can air entrapment, voidlessness between steel pipe layer and the plastic layer.In plastic tube, be inflated to 2-6kg/cm
2, and make steel pipe laminar surface temperature reach 210-260 degree centigrade by heating, and make the plastic pipe layer and the steel pipe layer that scribble hot melt adhesive be bonded as one, be difficult for aliquation between steel pipe layer and the plastic layer.Improve the quality of product of steel-plastic composite pipe, simplified production technology, reduced cost of production.
Embodiment:
This embodiment by the following technical solutions, it adopts following process step:
1, with extruder plastic tube is coated in the outer surface of plastic tube by co-extruding mould equably with commercially available hot melt adhesive, and makes the outer diameter of plastic tube be slightly larger than the inner diameter of steel pipe;
2, will be fixed on through the steel pipe of processing of rust removing or plating zinc on surface on the working station, and special manipulator be worn to the other end in an end of steel pipe, and plastic tube is blocked;
3, special manipulator is drawn in plastic tube in the steel pipe, and this moment, the plastic tube caliber diminished because tension, in be stuck in the steel pipe;
4, one end of the plastic tube in the steel pipe is stopped up, in plastic tube, be inflated to relevant pressure from the other end;
5, the steel pipe with the built-in plastic tube of above-mentioned steps 4 heats by heating plant, and steel pipe laminar surface temperature reaches 210-260 degree centigrade, makes the plastic pipe layer and the steel pipe layer that scribble hot melt adhesive be bonded as one;
6, the steel pipe cooling and shaping of the built-in plastic tube of above-mentioned steps 5 is made steel-plastic composite pipe.
Compared with prior art, this embodiment has the following advantages: the outer diameter of plastic tube is slightly larger than the inner diameter of steel pipe, plastic tube is drawn in the steel pipe, this moment is because tension, the plastic tube caliber diminishes, in be stuck in the steel pipe, making between steel pipe layer and the plastic layer not can air entrapment, voidlessness between steel pipe layer and the plastic layer.In plastic tube, be inflated to 2-6kg/cm
2, and make steel pipe laminar surface temperature reach 210-260 degree centigrade by heating, and make the plastic pipe layer and the steel pipe layer that scribble hot melt adhesive be bonded as one, be difficult for aliquation between steel pipe layer and the plastic layer.Improve the quality of product of steel-plastic composite pipe, simplified production technology, reduced cost of production.
Claims (1)
1, a kind of production process of inner plastic layer of steel-plastic composite pipe, it is characterized in that it adopts following process step: 1), plastic tube is coated in the outer surface of plastic tube by co-extruding mould equably with commercially available hot melt adhesive, and make the outer diameter of plastic tube be slightly larger than the inner diameter of steel pipe with extruder; 2), will be fixed on through the steel pipe of processing of rust removing or plating zinc on surface on the working station, special manipulator is worn to the other end in an end of steel pipe, and plastic tube is blocked; 3), special manipulator draws in plastic tube in the steel pipe, this moment, the plastic tube caliber diminished because tension, in be stuck in the steel pipe; 4), one end of the plastic tube in the steel pipe is stopped up, in plastic tube, be inflated to pressure 2-6kg/cm from the other end
25), the steel pipe of the built-in plastic tube of above-mentioned steps 4 is heated by heating plant, steel pipe laminar surface temperature reaches 210-260 degree centigrade, makes the plastic pipe layer and the steel pipe layer that scribble hot melt adhesive be bonded as one; 6), the steel pipe cooling and shaping of the built-in plastic tube of above-mentioned steps 5 is made steel-plastic composite pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101957895A CN101387359A (en) | 2008-08-29 | 2008-08-29 | Production process of inner plastic layer of steel-plastic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101957895A CN101387359A (en) | 2008-08-29 | 2008-08-29 | Production process of inner plastic layer of steel-plastic composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101387359A true CN101387359A (en) | 2009-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101957895A Pending CN101387359A (en) | 2008-08-29 | 2008-08-29 | Production process of inner plastic layer of steel-plastic composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101387359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839375A (en) * | 2010-05-19 | 2010-09-22 | 王莘 | Method and equipment for producing flange type lining plastic compound steel pipe |
| CN103453238A (en) * | 2013-09-05 | 2013-12-18 | 广东联塑科技实业有限公司 | Plastic-lined compound pipe fitting and manufacturing method thereof |
-
2008
- 2008-08-29 CN CNA2008101957895A patent/CN101387359A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839375A (en) * | 2010-05-19 | 2010-09-22 | 王莘 | Method and equipment for producing flange type lining plastic compound steel pipe |
| CN103453238A (en) * | 2013-09-05 | 2013-12-18 | 广东联塑科技实业有限公司 | Plastic-lined compound pipe fitting and manufacturing method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090318 |