CN111546615B - Forming method of cylindrical epoxy glass fiber composite material product - Google Patents
Forming method of cylindrical epoxy glass fiber composite material product Download PDFInfo
- Publication number
- CN111546615B CN111546615B CN202010546222.9A CN202010546222A CN111546615B CN 111546615 B CN111546615 B CN 111546615B CN 202010546222 A CN202010546222 A CN 202010546222A CN 111546615 B CN111546615 B CN 111546615B
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- China
- Prior art keywords
- epoxy glass
- pressure
- fiber composite
- glass fiber
- heating
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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
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- 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
- B29C53/566—Winding and joining, e.g. winding spirally for making tubular articles followed by compression
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- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
-
- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8041—Measuring, controlling or regulating
-
- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
- B29C53/845—Heating or cooling especially adapted for winding and joining
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Insulating Bodies (AREA)
Abstract
The invention discloses a method for molding a cylindrical epoxy glass fiber composite product, which comprises the steps of carrying out hot rolling molding on epoxy glass cloth on a winding machine, controlling the temperature of a hot roller of the winding machine to be 100-120 ℃, controlling the rolling air pressure to be 0.1-0.2MPa and controlling the tension to be 2.0-2.2; and (3) after winding to a specified thickness, sealing the mould and the product by using a vacuum film, vacuumizing, placing in an autoclave, pressurizing, heating and curing in a vacuum state to obtain products with various specifications and dimensions. The epoxy glass cloth insulating cylinder prepared by the invention has excellent compactness, higher electrical property and mechanical strength, does not have the problem of layered cracking, and can be used for preparing a cylindrical epoxy glass fiber composite material with the specification of phi 10-phi 2000mm and high performance.
Description
Technical Field
The invention relates to a method for molding a cylindrical epoxy glass fiber composite material product.
Background
The traditional forming method of the cylindrical epoxy glass fiber composite material is that epoxy glass cloth is wound, the inner diameter is less than phi 700mm, the process comprises the steps of firstly preparing rubberized glass cloth, then winding and forming on a compression roller type pipe coiling machine, and then placing in an oven for heating and curing. The coiled pipe formed by the process has the advantages of poor compactness, low electrical strength, general mechanical strength, frequent interlayer cracking and low product percent of pass. For products with higher application requirements, such as a whole-barrel type guard ring insulating barrel used for a large-scale generator rotor, the diameter of the whole-barrel type guard ring insulating barrel is generally over phi 1000mm, and due to the particularity of the application working conditions, the whole-barrel type guard ring insulating barrel is required to have good integral rigidity, stable and reliable structure, excellent electrical strength and mechanical properties and higher heat resistance. The traditional forming mode cannot be realized.
Disclosure of Invention
The invention aims to provide a method for forming a cylindrical epoxy glass fiber composite material product with excellent compactness, higher electrical property and mechanical strength of a prepared epoxy glass cloth insulating cylinder.
The technical solution of the invention is as follows:
a method for molding a cylindrical epoxy glass fiber composite material product is characterized by comprising the following steps: comprises the following steps: hot-rolling the epoxy glass cloth on a winding machine for forming, wherein the temperature of a hot roller of the winding machine is controlled to be 100-120 ℃, the rolling gas pressure is 0.1-0.2MPa, and the tension is 2.0-2.2; and (3) after winding to a specified thickness, sealing the mould and the product by using a vacuum film, vacuumizing, placing in an autoclave, pressurizing and heating in a vacuum state for curing, and obtaining products with various specifications and dimensions.
When the pressure heating is cured:
temperature: heating to 120 ℃ at the speed of 3-5 ℃/min, and preserving heat for 1-2 hours according to the thickness of the product; then heating to 180 ℃ at the speed of 3 ℃/min, and preserving heat for 2-6 hours; finally, cooling to 60 ℃ at the speed of 5 ℃/min;
pressure: pressurizing at 130 ℃, wherein the pressure increasing rate is 20-50 kPa/min, and the pressure is increased to 0.5 MPa; and (3) reducing the pressure at 80 ℃, wherein the pressure reduction rate is 20-50 kPa/min.
The winder adopts a hydraulic winder, a tension system of the winder adopts magnetic powder braking and tension control, and a deviation rectifying system implements discharging deviation rectification and axial deviation rectification.
The epoxy glass cloth insulating cylinder prepared by the invention has excellent compactness, higher electrical property and mechanical strength, does not have the problem of delamination and cracking, and can be used for manufacturing a cylindrical epoxy glass fiber composite material with the specification of phi 10-phi 2000mm and high performance.
And (3) comparison of a forming method:
comparison of product Properties:
Detailed Description
A method for molding a cylindrical epoxy glass fiber composite product comprises the following steps: and (2) carrying out hot rolling molding on the epoxy glass cloth on a winding machine, controlling the temperature of a hot roller to be 100-120 ℃, controlling the rolling pressure to be 0.1-0.2MPa and the tension to be 2.0-2.2, sealing the mold and the product by using a vacuum film after winding to the specified thickness, vacuumizing, placing the mold and the product in an autoclave, and pressurizing, heating and curing the mold and the product in a vacuum state to obtain products with various specifications and sizes.
And (3) a curing process:
temperature: heating to 120 ℃ at the speed of 3-5 ℃/min, and preserving heat for 1-2 hours according to the thickness of the product; then heating to 180 ℃ at the speed of 3 ℃/min, and preserving heat for 2-6 hours; finally, the temperature is reduced to 60 ℃ at the speed of 5 ℃/min.
Pressure: pressurizing at 130 ℃, wherein the pressure increasing rate is 20-50 kPa/min, and the pressure is increased to 0.5 MPa; and (3) reducing the pressure at 80 ℃, wherein the pressure reduction rate is 20-50 kPa/min.
The winder adopts a hydraulic winder, a tension system of the winder adopts magnetic powder braking and tension control, and a deviation rectifying system implements discharging deviation rectification and axial deviation rectification.
Claims (2)
1. A method for molding a cylindrical epoxy glass fiber composite material product is characterized by comprising the following steps: comprises the following steps: hot-rolling the epoxy glass cloth on a winding machine for forming, wherein the temperature of a hot roller of the winding machine is controlled to be 100-120 ℃, the rolling gas pressure is 0.1-0.2MPa, and the tension is 2.0-2.2; after winding to a specified thickness, sealing the mould and the product by using a vacuum film, vacuumizing, placing in an autoclave, pressurizing and heating to cure in a vacuum state to obtain products with various specifications and sizes;
when the pressure heating is cured:
temperature: heating to 120 ℃ at the speed of 3-5 ℃/min, and preserving heat for 1-2 hours according to the thickness of the product; then heating to 180 ℃ at the speed of 3 ℃/min, and preserving heat for 2-6 hours; finally, cooling to 60 ℃ at the speed of 5 ℃/min;
pressure: pressurizing at 130 ℃, wherein the pressure increasing rate is 20-50 kPa/min, and the pressure is increased to 0.5 MPa; and (3) reducing the pressure at 80 ℃, wherein the pressure reduction rate is 20-50 kPa/min.
2. The method for molding the cylindrical epoxy glass fiber composite material product as claimed in claim 1, wherein the method comprises the following steps: the winder adopts a hydraulic winder, a tension system of the winder adopts magnetic powder braking and tension control, and a deviation rectifying system implements discharging deviation rectification and axial deviation rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546222.9A CN111546615B (en) | 2020-06-16 | 2020-06-16 | Forming method of cylindrical epoxy glass fiber composite material product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546222.9A CN111546615B (en) | 2020-06-16 | 2020-06-16 | Forming method of cylindrical epoxy glass fiber composite material product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111546615A CN111546615A (en) | 2020-08-18 |
| CN111546615B true CN111546615B (en) | 2022-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010546222.9A Active CN111546615B (en) | 2020-06-16 | 2020-06-16 | Forming method of cylindrical epoxy glass fiber composite material product |
Country Status (1)
| Country | Link |
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| CN (1) | CN111546615B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103101199A (en) * | 2012-11-07 | 2013-05-15 | 洛阳轴研科技股份有限公司 | Preparation method of composition material for ball bearing retainer |
| CN105584057A (en) * | 2014-10-21 | 2016-05-18 | 中国石油化工股份有限公司 | Carbon fiber/epoxy resin prepreg autoclave molding method |
| CN108284622B (en) * | 2017-12-13 | 2020-06-23 | 江南工业集团有限公司 | Forming process of composite material winding tubular member |
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2020
- 2020-06-16 CN CN202010546222.9A patent/CN111546615B/en active Active
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| Publication number | Publication date |
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| CN111546615A (en) | 2020-08-18 |
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