CN113002032A - Production process of high-molecular PE composite pipe - Google Patents
Production process of high-molecular PE composite pipe Download PDFInfo
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- CN113002032A CN113002032A CN202110149107.2A CN202110149107A CN113002032A CN 113002032 A CN113002032 A CN 113002032A CN 202110149107 A CN202110149107 A CN 202110149107A CN 113002032 A CN113002032 A CN 113002032A
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- composite pipe
- production process
- core pipe
- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- 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
- B29K2023/0658—PE, i.e. polyethylene characterised by its molecular weight
- B29K2023/0675—HMWPE, i.e. high molecular weight polyethylene
Abstract
The invention relates to a production process of a high-molecular PE composite pipe, which comprises the following steps: fully mixing the high molecular polyethylene raw material, the color master powder and the epoxy adhesive resin; dehumidifying the mixture and then feeding the mixture into an extruder to obtain a core pipe; carrying out vacuum sizing and cooling on the core pipe; sending the core pipe to a steel wire winding unit, and winding high-strength plated steel wires in the outer circumferential direction of the core pipe; compounding the middle bonding layer, then heating and shaping, and compounding an outer layer on the outer side of the middle bonding layer, then heating and shaping to obtain a composite pipe; after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting; and polishing the end opening of the molded composite pipe. Compared with the prior art, the invention has the advantages that: the method of the invention has low manufacturing cost, and the produced high molecular polyethylene composite pipe comprehensively maintains the unique superior performances of high molecular polyethylene, such as good memory, high impact resistance, good temperature resistance, wear resistance, corrosion resistance, wax prevention, scale prevention and the like.
Description
Technical Field
The invention relates to the field of production of polymer PE composite pipes, in particular to a production process of a polymer PE composite pipe.
Background
In recent years, the polymer polyethylene industry has been developed very rapidly. The main reasons are that the high molecular polyethylene pipe has the properties of extremely high wear resistance, extremely high impact resistance, excellent corrosion resistance, good self-lubricating property, unique low temperature resistance, difficult scaling, excellent environmental stress cracking resistance, high fatigue strength and the like.
Based on the superior material performance of the high molecular weight polyethylene, the adopted processing technology is that the traditional technology of heating and melting the to-be-lined plastic to a fluid state and then carrying out injection molding is continuously used, but the traditional injection molding method is used for steel lining molding, wherein the steel surface treatment process is complex, the treatment requirement is high, a mold needs to be manufactured in advance in the injection molding process, complicated process steps such as demolding and the like are needed after molding, the quality and the quality of a finished product are poor in stability and consistency, even the phenomena of poor adhesion of the ultra-high molecular weight polyethylene material and a steel pipe, peeling of an inner liner, loosening and the like occur, and the manufacturing cost of the product is high.
Disclosure of Invention
The invention aims to solve the technical problems and provides a production process of a high-molecular PE composite pipe.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a production process of a high polymer PE composite pipe comprises the following steps:
the method comprises the following steps: pouring the high molecular polyethylene raw material into mixing equipment, adding the color master powder and the epoxy adhesive resin, and fully mixing;
step two: dehumidifying the mixture, compressing air by an air compressor, sending the compressed air into mixing equipment for dehumidification treatment, sending the dehumidified mixture into an extruder, heating the mixture in the extruder to be above a melting point, and extruding the mixture to be molded to obtain a core pipe;
step three: carrying out vacuum sizing and cooling on the core pipe, and then using a tractor to draw the shaped core pipe;
step four: sending the core pipe to a steel wire winding unit, and winding high-strength plated steel wires in the outer circumferential direction of the core pipe;
step five: compounding the middle bonding layer, then heating and shaping, and compounding an outer layer on the outer side of the middle bonding layer, then heating and shaping to obtain a composite pipe;
step six: after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting;
step seven: and polishing the end openings of the molded composite pipes until the steel wires at the two ends of the end openings are polished off and the end openings are flat.
Furthermore, the mixing equipment adopts a low-speed mixer, and the mixing time is controlled to be 8-10 minutes.
Furthermore, the extruder in the third step is preheated and insulated for 50-60 minutes before working.
Further, in the fifth step, after the raw materials of the middle bonding layer are mixed by adopting mixing equipment, an extruder is used for compounding the raw materials to the outer circumference direction of the steel wire, and the outer layer PE raw material is mixed thickly and compounded to the outer side of the middle bonding layer by using the extruder.
Further, the steel wire winding unit in the fourth step comprises the following steps: after the winding machine is started, firstly winding the rubber wires on the outer side of the core pipe, and then heating at high frequency; and (4) winding the steel wire after the glue wire is melted to have fluidity, and cooling and shaping.
Compared with the prior art, the invention has the advantages that: extrude the core pipe earlier, carry out the winding steel wire after the sizing shaping, new winding glue silk between carrying out the winding steel wire, can improve the stability of being connected between steel wire and the core pipe like this, and carry out compound middle anchor coat in the skin of steel wire, middle anchor coat permeates the steel wire layer, become the integral type structure that firmly combines, outer compound polymer PE is outer, accomplish the combined process, composite process is simpler, the combined process control degree of difficulty is littleer, correspondingly, the composite cost is lower, polymer polyethylene core pipe combines more compactly with the steel pipe, it is firm, and can not produce the layering and peel off the scheduling problem.
The method of the invention has low manufacturing cost, and the produced high molecular polyethylene composite pipe comprehensively maintains the unique superior performances of high molecular polyethylene, such as good memory, high impact resistance, good temperature resistance, wear resistance, corrosion resistance, wax prevention, scale prevention and the like.
Drawings
FIG. 1 is a process flow diagram of the present invention for producing a high molecular PE composite pipe.
FIG. 2 is a schematic structural diagram of a composite pipe produced by the production process of the high polymer PE composite pipe.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A production process of a high polymer PE composite pipe comprises the following steps:
the method comprises the following steps: pouring the high molecular polyethylene raw material into mixing equipment, adding the color master powder and the epoxy adhesive resin, and fully mixing, wherein the mixing equipment adopts a low-speed mixer, and the mixing time is controlled to be 8-10 minutes;
step two: dehumidifying the mixture, compressing air by an air compressor, sending the compressed air into a mixing device for dehumidification treatment, sending the dehumidified mixture into an extruder, heating the mixture in the extruder to a temperature above a melting point, extruding the mixture to form to obtain a core pipe, and preheating and preserving heat for 50-60 minutes before the extruder works;
step three: carrying out vacuum sizing and cooling on the core pipe, and then using a tractor to draw the shaped core pipe;
step four: sending the core pipe to a steel wire winding unit, winding a high-strength plated steel wire in the outer circumferential direction of the core pipe, wherein the steel wire winding unit comprises the following steps: after the winding machine is started, firstly winding the rubber wires on the outer side of the core pipe, and then heating at high frequency; after the glue wires are melted to have fluidity (the melting degree of the glue wires is 50 percent), winding the steel wires, and cooling and shaping;
step five: heating and shaping after compounding the intermediate bonding layer, and compounding the raw materials of the intermediate bonding layer to the outer circumferential direction of the steel wire by using an extruder after mixing the raw materials of the intermediate bonding layer by using mixing equipment; compounding an outer layer on the outer side of the middle bonding layer, heating and shaping, mixing the outer layer PE raw material to be thick, and compounding the outer layer PE raw material to the outer side of the middle bonding layer by using an extruder to obtain a composite pipe;
step six: after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting;
step seven: and polishing the end openings of the molded composite pipes until the steel wires at the two ends of the end openings are polished off and the end openings are flat.
Comparative example one:
1) extruding a high molecular polyethylene raw material into a pipe die by an extruding machine to prepare an inner layer high molecular polyethylene core pipe for later use;
2) winding a steel wire mesh pipe on a winding machine according to the size of the core pipe, and then sleeving the steel wire mesh pipe on a high-molecular polyethylene core pipe for later use;
3) preparing an inner-layer high-molecular polyethylene outer-layer pipe again by using an extruding machine, sleeving the inner-layer high-molecular polyethylene outer-layer pipe outside the steel wire mesh pipe, and arranging a gap between the steel wire mesh pipe and the outer-layer pipe;
4) pouring and filling the gap by using an intermediate bonding agent to obtain a composite pipe;
5) and (4) cooling and forming the composite pipe, and then carrying out traction cutting.
The first embodiment is as follows:
the method comprises the following steps: pouring the high molecular polyethylene raw material into mixing equipment, adding the color master powder and the epoxy adhesive resin, and fully mixing;
step two: dehumidifying the mixture, compressing air by an air compressor, sending the compressed air into mixing equipment for dehumidification treatment, sending the dehumidified mixture into an extruder, heating the mixture in the extruder to be above a melting point, and extruding the mixture to be molded to obtain a core pipe;
step three: carrying out vacuum sizing and cooling on the core pipe, and then using a tractor to draw the shaped core pipe;
step four: sending the core pipe to a steel wire winding unit, and winding high-strength plated steel wires in the outer circumferential direction of the core pipe;
step five: heating and shaping after compounding the intermediate bonding layer, wherein the intermediate bonding layer is an aerogel solution and silicon dioxide aerogel is selected; compounding an outer layer on the outer side of the middle bonding layer, and then heating and shaping to obtain a composite pipe;
step six: after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting;
step seven: and polishing the end openings of the molded composite pipes until the steel wires at the two ends of the end openings are polished off and the end openings are flat.
Example two:
the method comprises the following steps: pouring the high molecular polyethylene raw material into mixing equipment, adding the color master powder and the epoxy adhesive resin, and fully mixing;
step two: dehumidifying the mixture, compressing air by an air compressor, sending the compressed air into mixing equipment for dehumidification treatment, sending the dehumidified mixture into an extruder, heating the mixture in the extruder to be above a melting point, and extruding the mixture to be molded to obtain a core pipe;
step three: carrying out vacuum sizing and cooling on the core pipe, and then using a tractor to draw the shaped core pipe;
step four: sending the core pipe to a steel wire winding unit, and winding high-strength plated steel wires in the outer circumferential direction of the core pipe;
step five: heating and shaping after compounding the intermediate bonding layer, wherein the intermediate bonding layer is an aerogel solution and titanium oxide aerogel is selected; compounding an outer layer on the outer side of the middle bonding layer, and then heating and shaping to obtain a composite pipe;
step six: after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting;
step seven: and polishing the end openings of the molded composite pipes until the steel wires at the two ends of the end openings are polished off and the end openings are flat.
The comparison of the first comparative example with the first and second examples proves that the composite pipe designed by the technical scheme has excellent wear resistance, pressure resistance, impact resistance, fracture resistance and heat preservation, and the service life of the pipeline is long.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A production process of a high-molecular PE composite pipe is characterized by comprising the following steps: it comprises the following steps:
the method comprises the following steps: pouring the high molecular polyethylene raw material into mixing equipment, adding the color master powder and the epoxy adhesive resin, and fully mixing;
step two: dehumidifying the mixture, compressing air by an air compressor, sending the compressed air into mixing equipment for dehumidification treatment, sending the dehumidified mixture into an extruder, heating the mixture in the extruder to be above a melting point, and extruding the mixture to be molded to obtain a core pipe;
step three: carrying out vacuum sizing and cooling on the core pipe, and then using a tractor to draw the shaped core pipe;
step four: sending the core pipe to a steel wire winding unit, and winding high-strength plated steel wires in the outer circumferential direction of the core pipe;
step five: compounding the middle bonding layer, then heating and shaping, and compounding an outer layer on the outer side of the middle bonding layer, then heating and shaping to obtain a composite pipe;
step six: after the composite pipe enters a cooling forming unit for cooling forming, cutting by using traction cutting;
step seven: and polishing the end openings of the molded composite pipes until the steel wires at the two ends of the end openings are polished off and the end openings are flat.
2. The production process of the high polymer PE composite pipe according to claim 1, wherein the production process comprises the following steps: the mixing equipment adopts a low-speed mixer, and the mixing time is controlled to be 8-10 minutes.
3. The production process of the high polymer PE composite pipe according to claim 1, wherein the production process comprises the following steps: and in the third step, the extruder is preheated and insulated for 50-60 minutes before working.
4. The production process of the high polymer PE composite pipe according to claim 1, wherein the production process comprises the following steps: and fifthly, mixing the raw materials of the middle bonding layer by using mixing equipment, compounding the raw materials to the outer circumference direction of the steel wire by using an extruder, mixing the raw materials of the outer PE layer, and compounding the raw materials of the outer PE layer to the outer side of the middle bonding layer by using the extruder.
5. The production process of the high polymer PE composite pipe according to claim 1, wherein the production process comprises the following steps: the steel wire winding unit in the fourth step comprises the following steps: after the winding machine is started, firstly winding the rubber wires on the outer side of the core pipe, and then heating at high frequency; and (4) winding the steel wire after the glue wire is melted to have fluidity, and cooling and shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110149107.2A CN113002032A (en) | 2021-02-03 | 2021-02-03 | Production process of high-molecular PE composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110149107.2A CN113002032A (en) | 2021-02-03 | 2021-02-03 | Production process of high-molecular PE composite pipe |
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| Publication Number | Publication Date |
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| CN113002032A true CN113002032A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110149107.2A Withdrawn CN113002032A (en) | 2021-02-03 | 2021-02-03 | Production process of high-molecular PE composite pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309364A (en) * | 2021-12-01 | 2022-04-12 | 湖南海旭管业有限公司 | Steel wire winding weaving method for reversely weaving high-pressure oil pipe |
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2021
- 2021-02-03 CN CN202110149107.2A patent/CN113002032A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309364A (en) * | 2021-12-01 | 2022-04-12 | 湖南海旭管业有限公司 | Steel wire winding weaving method for reversely weaving high-pressure oil pipe |
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Application publication date: 20210622 |