CN111362713A - Preparation method of asphalt-based carbon fiber felt heat-insulation cylinder - Google Patents
Preparation method of asphalt-based carbon fiber felt heat-insulation cylinder Download PDFInfo
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- CN111362713A CN111362713A CN202010187212.0A CN202010187212A CN111362713A CN 111362713 A CN111362713 A CN 111362713A CN 202010187212 A CN202010187212 A CN 202010187212A CN 111362713 A CN111362713 A CN 111362713A
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
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- C04B41/4554—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application the coating or impregnating process including a chemical conversion or reaction the coating or impregnating material being an organic or organo-metallic precursor of an inorganic material
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Abstract
The invention discloses a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder, which comprises the following steps: carrying out spray resin pretreatment on the soft felt, applying pressure to the soft felt through the assistance of a cloth belt, winding the soft felt on a forming mould, and fastening the soft felt on the outer surface of the soft felt by using a mould hoop to obtain a blank of the heat-preserving cylinder; putting the blank of the heat-preserving cylinder into an oven for curing; putting the solidified heat-preserving cylinder blank into a vacuum furnace for carbonization treatment; machining the obtained blank according to the drawing requirements to obtain a prefabricated body of the heat-preservation cylinder; coating the surface of the prefabricated body of the heat-insulating cylinder with carbon/carbon composite coating, and putting the prefabricated body of the heat-insulating cylinder into an oven and a vacuum furnace for curing and carbonizing the coating; and coating, curing and carbonizing the surface of the prefabricated part again, and finishing the manufacture of the asphalt-based carbon fiber felt heat-insulating cylinder product. The preparation method of the heat preservation cylinder can control the density and quality of the product; by adopting the surface coating, the product has better erosion resistance and oxidation resistance, and the service life of the heat-insulating cylinder can be prolonged.
Description
Technical Field
The invention relates to the technical field of preparation of heat-insulating materials, in particular to a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder.
Background
Because the asphalt-based carbon fiber felt is low in density and strength, the asphalt-based carbon fiber felt is directly used for winding and forming, the machining and coating quality of the product is difficult to control, the density of the manufactured heat-insulating cylinder product is low, the heat-insulating performance is poor, and the surface coating of the product is easy to damage in the using process and has certain influence on the service life of the product. Therefore, a manufacturing method is needed to ensure that the performance and index of the heat preservation cylinder can meet the requirements of users and the quality is better.
Disclosure of Invention
The invention aims to provide a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder, which aims to solve the problems in the prior art, so that the asphalt-based carbon fiber felt can be subjected to pressure and winding forming on a soft felt through the assistance of a cloth belt, and the quality of a formed product is improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder, which comprises the following steps:
firstly, pretreating a soft felt by spraying resin, winding the soft felt around a raw material shaft arranged on a forming device, starting a motor, driving the soft felt to be wound on a forming mould of a cylindrical mould through an auxiliary belt, forming and pressing the soft felt on the forming mould, and fastening the soft felt on the outer surface of the soft felt by using a mould hoop to obtain a blank of a heat-insulating cylinder;
secondly, putting the formed blank into an oven, and curing resin;
step three, putting the blank subjected to resin curing treatment into a carbonization furnace for carbonization treatment;
step four, carrying out mechanical processing on the blank obtained after the solidification and carbonization treatment according to the drawing requirements to obtain a prefabricated body of the heat-insulating cylinder;
coating a carbon/carbon composite coating on the surface of the prefabricated body of the heat-insulating cylinder to form a protective coating, putting the protective coating into an oven for curing the coating, and then putting the protective coating into a vacuum oven for carbonizing the coating;
and step six, repeating the operation flow of the step five once, and finishing the manufacture of the asphalt-based carbon fiber felt heat-insulating cylinder product.
Preferably, in the step one, the pressure value of the molding pressing is 1.0-1.5 MPa;
preferably, in the second step, the curing treatment temperature of the resin is 160-200 ℃ and the time is 6-8 h.
Preferably, in the third step, the carbonization treatment temperature of the blank is 1100-1800 ℃ and the time is 12-17 h.
Preferably, the carbon/carbon composite coating ingredient comprises resin, ethanol and graphite powder, wherein the resin: ethanol: the mass ratio of the graphite powder is (1.3-2.3): (1.8-2.8): 1.
preferably, the resin is a thermosetting phenolic resin of HK-2506 type.
Preferably, in the fifth step, the temperature of the curing treatment of the carbon/carbon composite coating is 160-180 ℃ and the time is 1.5-3 h.
Preferably, in the fifth step, the carbonization treatment temperature of the carbon/carbon composite coating is 1500-1800 ℃ and the time is 12-15 h.
Compared with the prior art, the invention has the following technical effects:
the preparation method of the heat preservation cylinder of the invention uses the auxiliary asphalt-based carbon fiber felt to form the prefabricated body of the heat preservation cylinder, and applies pressure to ensure that the density of the product is 0.120g/cm3-0.165g/cm3The range is controllable; the blank is processed into a heat-insulating cylinder through solidification, carbonization and high-temperature heat treatment, and the surface coating of the heat-insulating cylinder is manufactured by adopting a carbon/carbon composite coating technology, so that the heat-insulating cylinder has better erosion resistance and oxidation resistance, the service life of the heat-insulating cylinder can be prolonged, and the heat-insulating property and the heat stability of the heat-insulating cylinder are improvedThe performance is improved, the crystal pulling cost is reduced, and the crystal pulling yield is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a carbon fiber felt insulation cylinder molding apparatus according to the present invention;
FIG. 2 is a schematic structural view of a finished product of the heat-insulating cylinder of the present invention;
wherein: 1-frame, 2-rotating shaft, 3-forming mould, 4-auxiliary material recovery shaft, 5-motor, 6-extrusion shaft, 7-raw material shaft, 8-auxiliary material shaft and 9-conveying belt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder, which aims to solve the problems in the prior art, so that the asphalt-based carbon fiber felt can be pressed by a cloth belt to assist in winding and forming, and the quality of a formed product is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 2: the embodiment provides a preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder, which specifically comprises the following steps:
firstly, preprocessing resin spraying is carried out on a soft felt, the soft felt is wound around a raw material shaft arranged on a forming device, a motor is started, the soft felt is driven to be wound on a forming mould 3 of a cylindrical mould through an auxiliary belt, forming and pressing are carried out on the soft felt on the forming mould 3, then a mould hoop is used for fastening the outer surface of the soft felt, and a blank of a heat preservation cylinder is obtained, wherein the pressure value of the forming and pressing is 1.0MPa-1.5 MPa. The resin in the embodiment is phenolic resin, and the soft felt is asphalt-based carbon fiber felt.
Secondly, putting the formed blank into an oven, and curing resin; the curing temperature of the resin is 160-200 ℃, and the curing time is 6-8 h.
Putting the blank subjected to the resin curing treatment into a carbonization furnace, and performing carbonization treatment on the blank; the carbonization treatment temperature of the blank is 1100-1800 ℃ and the time is 12-17 h.
And step four, mechanically processing the blank of the heat-insulating cylinder obtained after the solidification and carbonization treatment according to the drawing requirements to obtain a prefabricated body of the heat-insulating cylinder.
Coating a carbon/carbon composite coating on the surface of the prefabricated part of the heat-insulating cylinder to form a protective coating; the carbon/carbon composite coating comprises resin, ethanol and graphite powder, wherein the resin comprises the following components in parts by weight: ethanol: the mass ratio of the graphite powder is (1.3-2.3): (1.8-2.8): 1. wherein the resin is HK-2506 type thermosetting phenolic resin. Putting the mixture into a drying oven for curing the coating, and then putting the mixture into a vacuum oven for carbonizing the coating; the temperature of the curing treatment of the carbon/carbon composite coating is 160-180 ℃, and the time is 1.5-3 h; the temperature of the carbonization treatment of the carbon/carbon composite coating is 1500-1800 ℃ and the time is 12-15 h.
And step six, repeating the operation flow of the step five once, and finishing the manufacture of the molded product of the asphalt-based carbon fiber felt heat-insulating cylinder.
The preparation method of the pitch-based carbon fiber felt heat preservation cylinder in the embodiment is based on a carbon fiber felt heat preservation cylinder forming device, and comprises a frame 1, and a raw material shaft 7, an auxiliary material shaft 8, a forming mold 3, an extrusion shaft 6, an auxiliary material recovery shaft 4 and a motor 5 which are arranged on the frame 1, wherein the motor 5 is connected with the auxiliary material recovery shaft 4, one end of an auxiliary belt is wound on the auxiliary material shaft 8, and the other end of the auxiliary belt is wound on the forming mold 3 and is arranged on the auxiliary material recovery shaft 4On, the auxiliary belt gets into and walks around an extrusion axle 6 respectively when going out forming die 3, and the one end of raw materials area is around locating raw materials axle 7, and the raw materials area (soft felt) other end sets up on forming die 3, and raw materials area (soft felt) pastes and goes into forming die 3 on the auxiliary belt. The molding mould 3 is cylindrical, the center of the molding mould is provided with a mounting hole of the rotating shaft 2, the molding mould 3 can be detached and has different sizes correspondingly according to different product specifications. The extrusion shaft 6 is a pressure shaft, and the pressure shaft and the auxiliary material shaft 8 are both provided with pressers. The central angle between the axes of the two extrusion shafts 6 and the forming mould 3 is smaller than 90 degrees, a horizontal transmission belt 9 is arranged on the frame 1, a raw material shaft 7 is arranged above the transmission belt 9, an auxiliary material shaft 8 is arranged below the transmission belt 9, the auxiliary belt is pasted on the transmission belt 9, and the auxiliary material recovery shaft 4 is higher than the rotating shaft 2 and the pressure shaft of the forming mould 3. In this embodiment, according to different requirements of the product, the raw material belts (length, width, and weight), the auxiliary belts (length, width), and the pressures of different sizes are selected to perform the product forming process. In the embodiment, the auxiliary asphalt carbon fiber felt is formed into a prefabricated body of the heat preservation cylinder by the auxiliary belt, and pressure is applied to ensure that the density of the product is 0.120g/cm3-0.165g/cm3The range is controllable; the blank is subjected to curing, carbonization and high-temperature heat treatment, is mechanically processed into a heat-insulating cylinder, and the surface coating of the heat-insulating cylinder is manufactured by adopting a carbon/carbon composite coating technology, so that the heat-insulating cylinder has better erosion resistance and oxidation resistance, the service life of the heat-insulating cylinder can be prolonged, the heat-insulating property and the heat stability of the heat-insulating cylinder are improved, the crystal pulling cost is reduced, and the crystal pulling yield is improved.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A preparation method of an asphalt-based carbon fiber felt heat-insulating cylinder is characterized by comprising the following steps: the method specifically comprises the following steps:
firstly, pretreating a soft felt by spraying resin, winding the soft felt around a raw material shaft arranged on a forming device, starting a motor, driving the soft felt to be wound on a forming mould of a cylindrical mould through an auxiliary belt, forming and pressing the soft felt on the forming mould, and fastening the soft felt on the outer surface of the soft felt by using a mould hoop to obtain a blank of a heat-insulating cylinder;
secondly, putting the formed blank into an oven, and curing resin;
step three, putting the blank subjected to resin curing treatment into a carbonization furnace for carbonization treatment;
step four, carrying out mechanical processing on the blank obtained after the solidification and carbonization treatment according to the drawing requirements to obtain a prefabricated body of the heat-insulating cylinder;
coating a carbon/carbon composite coating on the surface of the prefabricated body of the heat-insulating cylinder to form a protective coating, putting the protective coating into an oven for curing the coating, and then putting the protective coating into a vacuum oven for carbonizing the coating;
and step six, repeating the operation flow of the step five once, and finishing the manufacture of the asphalt-based carbon fiber felt heat-insulating cylinder product.
2. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: in the first step, the pressure value of the molding pressing is 1.0MPa-1.5 MPa.
3. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: in the second step, the curing treatment temperature of the resin is 160-200 ℃ and the time is 6-8 h.
4. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: in the third step, the carbonization treatment temperature of the blank is 1100-1800 ℃ and the time is 12-17 h.
5. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: the carbon/carbon composite coating comprises the following ingredients of resin, ethanol and graphite powder, wherein the resin: ethanol: the mass ratio of the graphite powder is (1.3-2.3): 1.8-2.8): 1.
6. the method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 5, which is characterized in that: the resin is HK-2506 type thermosetting phenolic resin.
7. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: in the fifth step, the curing treatment temperature of the coating is 160-180 ℃ and the time is 1.5-3 h.
8. The method for preparing the asphalt-based carbon fiber felt thermal insulation cylinder according to claim 1, which is characterized in that: in the fifth step, the carbonization treatment temperature of the coating is 1500-1800 ℃ and the time is 12-15 h.
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| CN202010187212.0A CN111362713A (en) | 2020-03-17 | 2020-03-17 | Preparation method of asphalt-based carbon fiber felt heat-insulation cylinder |
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| CN202010187212.0A CN111362713A (en) | 2020-03-17 | 2020-03-17 | Preparation method of asphalt-based carbon fiber felt heat-insulation cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114773079A (en) * | 2022-05-10 | 2022-07-22 | 吉林联科特种石墨材料有限公司 | Preparation method of hard carbon fiber thermal insulation material with graphene efficient erosion-resistant layer |
| CN114907144A (en) * | 2022-06-06 | 2022-08-16 | 吉林联科特种石墨材料有限公司 | Method for preparing SiC-C composite high-temperature coating by one-step method |
| CN114920573A (en) * | 2022-06-06 | 2022-08-19 | 吉林联科特种石墨材料有限公司 | Sintering method for one-step coating process of asphalt-based hard carbon fiber thermal insulation material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03223104A (en) * | 1990-01-27 | 1991-10-02 | Mitsubishi Kasei Corp | Preparation of cylindrical carbon fiber-molded thermal insulating material |
| CN101948327A (en) * | 2010-08-17 | 2011-01-19 | 西安超码科技有限公司 | Method for preparing work hardening insulation quilt for high temperature furnace |
| CN104911696A (en) * | 2015-06-30 | 2015-09-16 | 湖南南方搏云新材料有限责任公司 | Immobilized-carbon felt overall draft tube for Czochralski silicon single crystal furnace and preparation method of draft tube |
| CN109824373A (en) * | 2019-03-08 | 2019-05-31 | 佛山市石金科技有限公司 | A kind of preparation method of functionality heat-preservation cylinder felt |
-
2020
- 2020-03-17 CN CN202010187212.0A patent/CN111362713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03223104A (en) * | 1990-01-27 | 1991-10-02 | Mitsubishi Kasei Corp | Preparation of cylindrical carbon fiber-molded thermal insulating material |
| CN101948327A (en) * | 2010-08-17 | 2011-01-19 | 西安超码科技有限公司 | Method for preparing work hardening insulation quilt for high temperature furnace |
| CN104911696A (en) * | 2015-06-30 | 2015-09-16 | 湖南南方搏云新材料有限责任公司 | Immobilized-carbon felt overall draft tube for Czochralski silicon single crystal furnace and preparation method of draft tube |
| CN109824373A (en) * | 2019-03-08 | 2019-05-31 | 佛山市石金科技有限公司 | A kind of preparation method of functionality heat-preservation cylinder felt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114773079A (en) * | 2022-05-10 | 2022-07-22 | 吉林联科特种石墨材料有限公司 | Preparation method of hard carbon fiber thermal insulation material with graphene efficient erosion-resistant layer |
| CN114907144A (en) * | 2022-06-06 | 2022-08-16 | 吉林联科特种石墨材料有限公司 | Method for preparing SiC-C composite high-temperature coating by one-step method |
| CN114920573A (en) * | 2022-06-06 | 2022-08-19 | 吉林联科特种石墨材料有限公司 | Sintering method for one-step coating process of asphalt-based hard carbon fiber thermal insulation material |
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