CN111497279A - Vacuum forming method of asphalt-based heat-insulating cylinder - Google Patents
Vacuum forming method of asphalt-based heat-insulating cylinder Download PDFInfo
- Publication number
- CN111497279A CN111497279A CN202010338459.8A CN202010338459A CN111497279A CN 111497279 A CN111497279 A CN 111497279A CN 202010338459 A CN202010338459 A CN 202010338459A CN 111497279 A CN111497279 A CN 111497279A
- Authority
- CN
- China
- Prior art keywords
- heat
- mould
- insulating cylinder
- vacuum
- asphalt
- Prior art date
- 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.)
- Pending
Links
Images
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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
Abstract
The invention discloses a vacuum forming method of an asphalt-based heat-insulating cylinder, which relates to the technical field of production of heat-insulating materials in a single crystal furnace; the method comprises the following steps: step one; manufacturing a mould; step two; cutting the carbon felt; step three; spraying resin; step four; spirally winding a soft felt; step five; vacuum forming; step six; fixing the outer die; step seven; curing; step eight; carbonizing; and obtaining a blank workpiece of the heat preservation cylinder. According to the vacuum forming method of the asphalt-based heat-insulating cylinder, the fibers are uniformly wound in the same direction, so that the radiation direction of a thermal field is perpendicular to the fiber direction of the heat-insulating cylinder, and the heat-insulating property of the asphalt-based heat-insulating cylinder is improved.
Description
Technical Field
The invention relates to the field of production of heat-insulating materials in single crystal furnaces, in particular to a vacuum forming method of an asphalt-based heat-insulating cylinder.
Background
The heat preservation cylinder is a necessary and main heat preservation device in the thermal field of the existing monocrystalline silicon growth furnace, is positioned outside the heating body and has the main functions of: the heat of the heater is kept, a proper temperature field is formed, the heat energy loss is reduced, and the operation power is reduced. The method for preparing the heat preservation cylinder at home and abroad is a vacuum filtration forming method, namely, the chopped carbon fiber slurry is injected into a cylinder mould, and the chopped carbon fiber slurry is filtered at the bottom by a vacuum pump to be deposited layer by layer to prepare the heat preservation cylinder. The process for preparing the heat-insulating cylinder by using the vacuum filtration method is complex, the production efficiency is low, the prepared heat-insulating cylinder has all-directional fiber distribution, and the heat-insulating performance is poor and unstable.
Disclosure of Invention
The invention aims to provide a vacuum forming method of an asphalt-based heat-insulating cylinder, which aims to solve the problems in the prior art, fibers are uniformly wound in the same direction, so that the radiation direction of a thermal field is perpendicular to the fiber direction of the heat-insulating cylinder, and the heat-insulating property of the asphalt-based heat-insulating cylinder is improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a vacuum forming method of an asphalt-based heat-insulating cylinder, which comprises the following steps:
step one; and manufacturing a mould, and processing and preparing an inner mould and an outer fixing mould according to the specific shape and size required by the product.
Step two; cutting the carbon felt; cutting the carbon felt according to the shape and the size of the blank of the heat preservation cylinder;
step three; spraying resin; uniformly spraying resin adhesive in a fixed proportion on the surface of the carbon felt according to the mass of the carbon felt;
step four; spirally winding a soft felt; pasting an isolation film, cutting the isolation film suitable for the inner mould and the outer fixed mould according to the size of the mould, pasting the isolation film on the inner mould and the outer fixed mould, sealing a vacuum bag film, preparing the vacuum bag film with the suitable size, sealing three surfaces, pasting a sealing strip on an unsealed surface, sealing the unsealed surface for later use, and sleeving the unsealed surface at the bottom of the mould for later use; spirally winding the soft felt on the inner mould coated with the isolating membrane until the specified felt consumption is reached;
step five; vacuum forming; sealing the vacuum bag, and connecting a vacuumizing tube in the middle of sealing until the vacuum bag is completely sealed; adjusting the pressure of a vacuum gauge, starting a vacuum pump for vacuumizing, and closing the vacuum pump after vacuumizing and compressing the soft felt to the required size;
step six; fixing the outer die; fixing the product within a required size range by using an external fixing device;
step seven; curing the resin; sending the molded heat-insulating cylinder with the mold into an oven, curing for 6-7.5 h at 170 ℃, and removing the inner mold and the outer mold after curing to obtain a pretreated heat-insulating cylinder;
step eight; carbonizing resin; and (3) sending the pretreated heat-insulating cylinder into a carbonization furnace, and carbonizing at 950-1600 ℃ for 12-13 h to obtain a heat-insulating cylinder blank workpiece.
Optionally, the heat-insulating cylinder with the mold in the seventh step sequentially comprises an inner mold, an isolating membrane, a spirally wound asphalt felt, a vacuum plastic bag membrane, an isolating membrane and an outer fixing mold from inside to outside.
Optionally, in the fourth step, the raw material winding manner is spiral winding.
Compared with the prior art, the invention has the following technical effects:
the invention solves the problems of time and labor waste and poor control of compression amount in the process of forming the asphalt-based carbon fiber thermal insulation material, compression forming is carried out mainly by controlling the magnitude of vacuum pressure, heating is not needed in the forming process, the stress is more uniform, felt is spirally and uniformly wound, and the production efficiency and the product performance are 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 diagram of a mold required by the vacuum forming method of the asphalt-based heat-insulating cylinder of the present invention;
FIG. 2 is a flow chart of a vacuum forming method of the asphalt-based heat-insulating cylinder of the present invention;
wherein, 1 is a vacuum-pumping pipe, 2 is an inner mould, 3 is a mould baffle structure, 4 is a spiral winding asphalt felt, 5 is a vacuum plastic bag film, 6 is an outer fixing mould, and 7 is a forming frame.
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 any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a vacuum forming method of an asphalt-based heat-insulating cylinder, which aims to solve the problems in the prior art, fibers are uniformly wound in the same direction, so that the radiation direction of a thermal field is perpendicular to the fiber direction of the heat-insulating cylinder, and the heat-insulating property of the asphalt-based heat-insulating cylinder 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.
The invention provides a vacuum forming method of an asphalt-based heat-insulating cylinder, which comprises the steps of taking an asphalt-based carbon felt as a raw material, spraying resin on the raw material, spirally winding, wrapping and sealing the raw material by using a vacuum plastic bag film, vacuumizing and compressing the raw material to a specified limit position by using a vacuum pump, fixing the raw material by using an external fixing mold, and then carrying out curing and carbonization treatment. Specifically, as shown in fig. 1 and 2, the method includes the following steps:
preparing an inner clamping fixture and an outer fixing mould, processing and preparing a corresponding inner clamping fixture 2 according to the specific shape and the inner diameter size of a blank product required by a product drawing, and placing the inner clamping fixture and the inner fixing mould on a forming frame 7; preparing a mould baffle structure 3 of an inner mould according to the size of the outer wall required by the blank, wherein the mould baffle structure 3 comprises an upper limit baffle and a lower limit baffle; and (3) formulating an outer fixing mold 6 according to the size of the outer wall of the blank and the size of the mold baffle structure 3, wherein the outer fixing mold 6 wraps a circle of the outer circumference of the inner mold 2, so that the outer fixing mold is fixed at the outer edges of the upper limiting baffle and the lower limiting baffle to form a limiting space of the spirally wound asphalt felt 4. Cutting the carbon felt according to the shape and the size of the blank of the heat-preservation cylinder mould; and (3) spraying an adhesive, namely uniformly spraying a resin adhesive in a fixed proportion on the surface of the carbon felt according to the mass of the carbon felt. And (3) sticking an isolating membrane, cutting the isolating membrane which accords with the size of the mould according to the height and the perimeter of the mould, and sticking a layer of isolating membrane on the contact positions of the outer surface of the inner mould 2, the inner surfaces of the upper limiting baffle and the lower limiting baffle and the asphalt felt. And a layer of isolating membrane is adhered to the contact position of the inner surface of the outer fixed mould 6 and the asphalt felt. And sealing the vacuum bag film, preparing the vacuum bag film with proper size, sealing three surfaces, pasting a sealing strip on an unsealed surface for sealing for later use, and sleeving the unsealed surface at the bottom of the mould for later use. And (3) performing vacuum forming, namely spirally winding the soft felt 4 on the inner mold 2 coated with the isolating film until the specified felt amount is used. Lifting the vacuum bag, sealing the vacuum bag, and inserting the vacuumizing tube 1 in the middle position of sealing until the vacuum bag is completely sealed. And adjusting the pressure of the vacuum gauge, starting a vacuum pump to vacuumize, vacuumizing to compress the soft felt 4 to a required limiting position, and closing the vacuum pump. It is fixed using an outer fixing mold 6. Curing resin, namely conveying the molded heat-insulating cylinder with the tire into an oven, and curing for 6-7.5 hours at 170 ℃ to obtain a pre-treated heat-insulating cylinder, wherein the pre-treated heat-insulating cylinder sequentially comprises an inner tire 2, an isolating membrane, a spiral winding asphalt felt 4, a vacuum plastic bag membrane 5, the isolating membrane and an outer fixing mold 6 from inside to outside; demolding the pretreatment heat-preservation cylinder; and (3) resin carbonization treatment, namely sending the pretreated heat-insulating cylinder into a carbonization furnace, and carbonizing at 950-1600 ℃ for 12-13 h to obtain a heat-insulating cylinder blank workpiece with proper size and density.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the 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 (3)
1. A vacuum forming method of an asphalt-based heat-insulating cylinder is characterized by comprising the following steps: the method comprises the following steps:
step one; and manufacturing a mould, and processing and preparing an inner mould and an outer fixing mould according to the specific shape and size required by the product.
Step two; cutting the carbon felt; cutting the carbon felt according to the shape and the size of the blank of the heat preservation cylinder;
step three; spraying resin; uniformly spraying resin adhesive in a fixed proportion on the surface of the carbon felt according to the mass of the carbon felt;
step four; spirally winding a soft felt; pasting an isolation film, cutting the isolation film suitable for the inner mould and the outer fixed mould according to the size of the mould, pasting the isolation film on the inner mould and the outer fixed mould, sealing a vacuum bag film, preparing the vacuum bag film with the suitable size, sealing three surfaces, pasting a sealing strip on an unsealed surface, sealing the unsealed surface for later use, and sleeving the unsealed surface at the bottom of the mould for later use; spirally winding the soft felt on the inner mould coated with the isolating membrane until the specified felt consumption is reached;
step five; vacuum forming; sealing the vacuum bag, and connecting a vacuumizing tube in the middle of sealing until the vacuum bag is completely sealed; adjusting the pressure of a vacuum gauge, starting a vacuum pump for vacuumizing, and closing the vacuum pump after vacuumizing and compressing the soft felt to the required size;
step six; fixing the outer die; fixing the product within a required size range by using an external fixing device;
step seven; curing the resin; sending the molded heat-insulating cylinder with the mould into an oven, and curing for 6-7.5 h at 170 ℃ to obtain a pretreated heat-insulating cylinder; demolding the pretreatment heat-preservation cylinder;
step eight; carbonizing resin; and (3) sending the pretreated heat-insulating cylinder into a carbonization furnace, and carbonizing at 950-1600 ℃ for 12-13 h to obtain a heat-insulating cylinder blank workpiece.
2. The vacuum forming method of asphalt-based heat-preserving container according to claim 1, characterized in that: and the heat-insulating cylinder with the mould in the seventh step sequentially comprises an inner mould, an isolating membrane, a spirally wound asphalt felt, a vacuum plastic bag membrane, an isolating membrane and an outer fixing mould from inside to outside.
3. The vacuum forming method of asphalt-based heat-preserving container according to claim 1, characterized in that: in the fourth step, the winding mode of the raw materials is spiral winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338459.8A CN111497279A (en) | 2020-04-26 | 2020-04-26 | Vacuum forming method of asphalt-based heat-insulating cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338459.8A CN111497279A (en) | 2020-04-26 | 2020-04-26 | Vacuum forming method of asphalt-based heat-insulating cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111497279A true CN111497279A (en) | 2020-08-07 |
Family
ID=71867752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010338459.8A Pending CN111497279A (en) | 2020-04-26 | 2020-04-26 | Vacuum forming method of asphalt-based heat-insulating cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111497279A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341051A (en) * | 1999-02-17 | 2002-03-20 | 东丽株式会社 | FRP cylindrical body and production method thereof |
| CN101407108A (en) * | 2007-10-11 | 2009-04-15 | 住胶体育用品株式会社 | Tubular body manufacturing method and tubular body |
| US20110195232A1 (en) * | 2007-08-02 | 2011-08-11 | The Boeing Company | Composite Strip |
| CN104261853A (en) * | 2014-09-26 | 2015-01-07 | 辽宁奥亿达新材料有限公司 | Pitch-based carbon fiber non-woven felt heat-insulating cylinder and preparation method thereof |
| CN108177359A (en) * | 2018-03-06 | 2018-06-19 | 核工业理化工程研究院 | A kind of winding molding compound material vacuum rotating solidification equipment and curing |
-
2020
- 2020-04-26 CN CN202010338459.8A patent/CN111497279A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341051A (en) * | 1999-02-17 | 2002-03-20 | 东丽株式会社 | FRP cylindrical body and production method thereof |
| US20110195232A1 (en) * | 2007-08-02 | 2011-08-11 | The Boeing Company | Composite Strip |
| CN101407108A (en) * | 2007-10-11 | 2009-04-15 | 住胶体育用品株式会社 | Tubular body manufacturing method and tubular body |
| CN104261853A (en) * | 2014-09-26 | 2015-01-07 | 辽宁奥亿达新材料有限公司 | Pitch-based carbon fiber non-woven felt heat-insulating cylinder and preparation method thereof |
| CN108177359A (en) * | 2018-03-06 | 2018-06-19 | 核工业理化工程研究院 | A kind of winding molding compound material vacuum rotating solidification equipment and curing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104149365B (en) | The microwave solidification method of composite axial workpiece and device | |
| CN106273536B (en) | The microwave curing manufacturing process and its laminate of carbon fiber/epoxy resin composite material | |
| CN108749030B (en) | Method for preparing composite material pipe by using internal expansion method forming die | |
| CN108191448A (en) | A kind of method that winding process prepares carbon/carbon cylinder | |
| CN111497279A (en) | Vacuum forming method of asphalt-based heat-insulating cylinder | |
| CN107351414A (en) | A kind of solid propellant rocket heat insulation layer and its forming method and crowded expanding installation | |
| CN101717992B (en) | Carbon-carbon composite guide cylinder of CZ silicon crystal growing furnace and preparation method thereof | |
| CN102490371A (en) | Fiberglass-reinforced plastic grid forming method and special forming mold thereof | |
| WO2018196514A1 (en) | Method for preparing composite material gas intake passage, and composite material gas intake passage | |
| WO2005024855A1 (en) | Compound and hollow insulator and manufacturing method thereof | |
| CN105366917A (en) | Technological method for assisting in die forming of microstructural thin glass element through tin liquor | |
| CN107249726B (en) | Manufacturing equipment and preparation method of silicon-oxygen compound | |
| CN111196044A (en) | Compression molding method for carbon fiber composite material mechanical arm | |
| CN109397724B (en) | High-temperature-resistant composite material and high-temperature thermal expansion forming method thereof | |
| CN111497280A (en) | Vacuum compression secondary forming asphalt-based heat-insulating cylinder forming method | |
| CN104494027B (en) | Double vacuum bag microwave solidification methods of carbon fibre composite product | |
| CN110877463A (en) | Low-cost forming method of V-shaped composite material part | |
| CN108220913B (en) | Rapid low-cost CVD (chemical vapor deposition) densification method for carbon/carbon composite material | |
| CN102581938B (en) | Mould for using two-dimensional fiber fabric to produce blanks of carbon-carbon composite barrel products | |
| CN110394994A (en) | A kind of moulding technique of semi-solid preparation mica products foil | |
| CN112848384A (en) | Microwave curing forming method for carbon fiber composite material with rotary cylinder structure | |
| CN203792699U (en) | Quick molding device for irregular surface of yacht interior | |
| CN113215650A (en) | R-angle carbon/carbon composite material crucible prepared based on winding process and forming method | |
| CN203200178U (en) | Vacuum hotpressing tank with isobaric recovery device | |
| CN111763096A (en) | Carbon-based material for heat preservation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200807 |
|
| RJ01 | Rejection of invention patent application after publication |