CN111267373A - Method for producing damp-proof insulating pipe for live working by squeezing, drawing and winding - Google Patents
Method for producing damp-proof insulating pipe for live working by squeezing, drawing and winding Download PDFInfo
- Publication number
- CN111267373A CN111267373A CN201811529471.6A CN201811529471A CN111267373A CN 111267373 A CN111267373 A CN 111267373A CN 201811529471 A CN201811529471 A CN 201811529471A CN 111267373 A CN111267373 A CN 111267373A
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- Prior art keywords
- winding
- glass fiber
- glue
- core mold
- producing
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- 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.)
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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
- 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
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
-
- 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
- B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
-
- 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
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
- B29L2023/225—Insulated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
Abstract
The invention discloses a method for producing a damp-proof insulating tube for live working by squeezing, drawing and winding, which belongs to the technical field of insulating tube manufacturing and comprises the following steps: the method comprises the following steps: preheating a core mold; step two: dipping glue; step three: glue homogenizing; step four: spirally winding; step five: squeezing, drawing and drawing; step six: curing and demolding; step seven: the method effectively improves the production efficiency and the curing effect, the outer wall of the cured pipeline is flat, and the pipeline is not easy to crack in the production process.
Description
Technical Field
The invention discloses a method for producing a damp-proof insulating tube for live working by squeezing, drawing and winding, and particularly relates to the technical field of insulating tube manufacturing.
Background
Along with the development of economy in China, the requirements on municipal engineering, building water supply and drainage, electric power systems, chemical industry, communication and irrigation safety are increased day by day, so that a better conveying pipeline is more important to select, for a long time, the conveying pipeline is made of metal materials, such as steel pipes, iron pipes and the like, the traditional metal material pipeline is gradually eliminated due to the defects of large energy consumption in the production process, multiple processes, high metal conductivity, easy corrosion, short service life, high facility maintenance cost and the like in severe environments such as moist, dirt accumulation, coastal salt mist and the like in actual use, and the traditional metal material pipeline replaces various novel material pipelines.
Disclosure of Invention
The invention aims to provide a method for producing a damp-proof insulating pipe for live working by squeezing, drawing and winding, which aims to solve the problem that the existing squeezing, drawing and winding glass steel pipe in the background art is easy to crack in the production process because bubbles in glue water expand and the glue water is cured and shrunk in the curing process.
In order to achieve the purpose, the invention provides the following technical scheme: a method for producing moisture-proof insulating tube for live working by squeezing, drawing and winding comprises the following steps:
the method comprises the following steps: preheating a core mold: preheating the core mould after connecting the core mould with a power supply;
step two: gum dipping: leading out the glass fiber from a creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller set, and carrying out rubber homogenization on the glass fiber through the rubber roller set;
step four: spiral winding: spirally winding the glass fiber after glue equalization on a core mold through a winding machine;
step five: squeezing, drawing and drawing: sending the core mold in the fourth step into a forming mold, and reducing by extrusion and traction of a reducing mold;
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
Preferably, the cross section of the core mold is circular, triangular or rectangular.
Preferably, the cross section of the inner cavity of the reducing die is circular, triangular or rectangular and the like.
Preferably, the heating temperature in the sixth step is heating by adopting a step temperature rise.
Preferably, the glass fiber in the second step is alkali-free glass fiber.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the method, the core mould is preheated for precuring, so that the subsequent curing time is reduced, and the production efficiency is improved;
2) the method carries out glue homogenizing operation on the glass fiber after glue dipping by using the glue roller set, so that the surface of the glass fiber has uniform glue content;
3) the method is used for vacuumizing and curing the glue, so that bubbles in the glue are discharged, the curing effect is improved, the production efficiency and the curing effect are effectively improved, the outer wall of the cured pipeline is flat, and the pipeline is not prone to cracking in the production process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a method for producing moisture-proof insulating tube for live working by squeezing, drawing and winding comprises the following steps:
the method comprises the following steps: preheating a core mold: preheating the core mould after connecting the core mould with a power supply;
step two: gum dipping: leading out the glass fiber from a creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller set, and carrying out rubber homogenization on the glass fiber through the rubber roller set;
step four: spiral winding: spirally winding the glass fiber after glue equalization on a core mold through a winding machine;
step five: squeezing, drawing and drawing: sending the core mold in the fourth step into a forming mold, and reducing by extrusion and traction of a reducing mold;
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
The cross section of the core mould is circular, triangular or rectangular and the like, the cross section of the inner cavity of the reducing mould is circular, triangular or rectangular and the like, the core mould and the reducing mould with corresponding cross section shapes can be selected for production according to actual production requirements, heating temperature in the sixth step is heated by adopting step heating, the phenomenon that after external glue is cured due to overhigh initial curing temperature, the internal glue is not cured is avoided, the outer wall of the pipeline is broken, and the glass fiber in the second step is alkali-free glass fiber, so that the chemical stability, the electrical insulation performance and the strength are good.
Example 1
The method comprises the following steps: preheating a core mold: preheating the core mold after connecting the core mold with a power supply, wherein the preheating temperature is 40 ℃;
step two: gum dipping: leading out the glass fiber from the creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping, so that the glass fiber is covered by glue;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller group, and carrying out rubber homogenization on the glass fiber through the rubber roller group, so that the thickness of a rubber water layer on the surface of the glass fiber is uniform, and pre-extruding bubbles in the rubber water;
step four: spiral winding: spirally winding the glass fiber after glue homogenizing on a core mold by a winding machine at a winding angle of 55 degrees;
step five: squeezing, drawing and drawing: sending the core mold in the fourth step into a forming mold, and extruding and drawing the core mold through a reducing mold to reduce the diameter of the core mold to obtain a pipeline with the outer diameter of 55 mm and the wall thickness of 20 mm;
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
| Angle of wrap (°) | 55 |
| Wall thickness (mm) | 20 |
| Circumferential strength: axial strength | 2∶1 |
Example 2
The method comprises the following steps: preheating a core mold: preheating the core mold after connecting the core mold with a power supply, wherein the preheating temperature is 40 ℃;
step two: gum dipping: leading out the glass fiber from the creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping, so that the glass fiber is covered by glue;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller group, and carrying out rubber homogenization on the glass fiber through the rubber roller group, so that the thickness of a rubber water layer on the surface of the glass fiber is uniform, and pre-extruding bubbles in the rubber water;
step four: spiral winding: spirally winding the glass fiber after glue homogenizing on a core mold by a winding machine at a winding angle of 68 degrees;
step five: squeezing, drawing and drawing: sending the core mold in the fourth step into a forming mold, and extruding and drawing the core mold through a reducing mold to reduce the diameter of the core mold to obtain a pipeline with the outer diameter of 55 mm and the wall thickness of 15.5 mm;
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
| Angle of wrap (°) | 68 |
| Wall thickness (mm) | 15.5 |
| Circumferential strength: axial strength | 6∶1 |
Example 3
The method comprises the following steps: preheating a core mold: preheating the core mold after connecting the core mold with a power supply, wherein the preheating temperature is 40 ℃;
step two: gum dipping: leading out the glass fiber from the creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping, so that the glass fiber is covered by glue;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller group, and carrying out rubber homogenization on the glass fiber through the rubber roller group, so that the thickness of a rubber water layer on the surface of the glass fiber is uniform, and pre-extruding bubbles in the rubber water;
step four: spiral winding: spirally winding the glass fiber after glue homogenizing on a core mold by a winding machine at a winding angle of 70 degrees;
step five: squeezing, drawing and drawing: and C, sending the core mold in the fourth step into a forming mold, and extruding and drawing the core mold through a reducing mold to reduce the diameter of the core mold so as to obtain a pipeline with the outer diameter of 55 mm and the wall thickness of 15 mm:
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
| Angle of wrap (°) | 70 |
| Wall thickness (mm) | 15 |
| Circumferential strength: axial strength | 8∶1 |
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for producing a damp-proof insulating tube for live working by squeezing, drawing and winding is characterized in that: the method comprises the following steps:
the method comprises the following steps: preheating a core mold: preheating the core mould after connecting the core mould with a power supply;
step two: gum dipping: leading out the glass fiber from a creel, passing through a tension controller, and then entering a glue dipping tank for glue dipping;
step three: glue homogenizing: introducing the glass fiber after gum dipping into a rubber roller set, and carrying out rubber homogenization on the glass fiber through the rubber roller set;
step four: spiral winding: spirally winding the glass fiber after glue equalization on a core mold through a winding machine;
step five: squeezing, drawing and drawing: sending the core mold in the fourth step into a forming mold, and reducing by extrusion and traction of a reducing mold;
step six: curing and demolding: sending the core mold in the fifth step into a curing oven, vacuumizing, heating, curing and demolding;
step seven: cutting a finished product: and cooling the finished product in the step six, and then cutting.
2. The method for producing the moisture-proof insulating tube for hot-line work by pultrusion and winding as claimed in claim 1, wherein: the cross section of the core mold is circular, triangular or rectangular and the like.
3. The method for producing the moisture-proof insulating tube for hot-line work by pultrusion and winding as claimed in claim 1, wherein: the cross section of the inner cavity of the reducing die is circular, triangular or rectangular and the like.
4. The method for producing the moisture-proof insulating tube for hot-line work by pultrusion and winding as claimed in claim 1, wherein: and heating temperature in the sixth step is stepped temperature rise heating.
5. The method for producing the moisture-proof insulating tube for hot-line work by pultrusion and winding as claimed in claim 1, wherein: and the glass fiber in the second step is alkali-free glass fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811529471.6A CN111267373A (en) | 2018-12-05 | 2018-12-05 | Method for producing damp-proof insulating pipe for live working by squeezing, drawing and winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811529471.6A CN111267373A (en) | 2018-12-05 | 2018-12-05 | Method for producing damp-proof insulating pipe for live working by squeezing, drawing and winding |
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| CN111267373A true CN111267373A (en) | 2020-06-12 |
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| CN201811529471.6A Pending CN111267373A (en) | 2018-12-05 | 2018-12-05 | Method for producing damp-proof insulating pipe for live working by squeezing, drawing and winding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721231A (en) * | 2020-12-10 | 2021-04-30 | 徐州海伦哲特种车辆有限公司 | Preparation method of high-rigidity insulating arm layer structure |
| CN114523687A (en) * | 2022-01-28 | 2022-05-24 | 哈尔滨玻璃钢研究院有限公司 | Forming method of thick-wall winding square pipe |
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| CN112721231A (en) * | 2020-12-10 | 2021-04-30 | 徐州海伦哲特种车辆有限公司 | Preparation method of high-rigidity insulating arm layer structure |
| CN114523687A (en) * | 2022-01-28 | 2022-05-24 | 哈尔滨玻璃钢研究院有限公司 | Forming method of thick-wall winding square pipe |
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