CN106747551A - Carbon/carbon compound material inner pan of electric cooker preparation method based on carbon fiber powder - Google Patents
Carbon/carbon compound material inner pan of electric cooker preparation method based on carbon fiber powder Download PDFInfo
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- CN106747551A CN106747551A CN201611183435.XA CN201611183435A CN106747551A CN 106747551 A CN106747551 A CN 106747551A CN 201611183435 A CN201611183435 A CN 201611183435A CN 106747551 A CN106747551 A CN 106747551A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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Abstract
The invention discloses a kind of without the hot-forming carbon/carbon compound material inner pan of electric cooker preparation method based on carbon fiber powder, it is characterized in that it includes dispensing, die-filling, solidification, the demoulding, chemical vapor deposition and machining steps, the present invention is made up the base substrate of some strength using carbon fiber powder of mould, the surface smoothness of product is greatly improved, reduce the consumption of raw material, amount of machining is reduced, subsequent chemistry vapor deposition times and deposition cost is decreased, labor productivity is improve；As long as simultaneously as die-filling solidification, without hot-forming, also reduces the cost of manufacture of inner pan of electric cooker base substrate.
Description
Technical field
The present invention relates to a kind of carbon/carbon compound material, prepared by specifically a kind of carbon/carbon compound material inner pan of electric cooker
Method, it is more particularly to a kind of without the hot-forming carbon/carbon compound material inner pan of electric cooker preparation side based on carbon fiber powder
Method.
Background technology
Carbon/carbon compound material is carbon fiber and pyrolysis carbon composite, is led with low-density and high-strength, high ratio modulus, height
Hot, low-expansion coefficient, frictional behaviour are good, and thermal shock resistance it is good, be before most having development the advantages of dimensional stability is high
One of the high-temperature material on way.Carbon/carbon compound material is widely used to Aero-Space, automobile work due to its unique performance
The fields such as industry, medical science aspect.At present, its preparation method generally comprises 1. precast body and prepares, the net that will be made by long carbon fiber
Tire and/or carbon cloth are according to the shape acupuncture that need to be prepared into base substrate；2. densification, will base substrate pass through chemical vapor infiltration
（Deposition）And/or liquid impregnation density obtains carbon/carbon compound material product.The method is applied in actual production, and skill
Art is more ripe, but, this method has preparation technology complexity, particularly to complex-shaped shaped piece, precast body
Blank needs single-piece, pure manual production, and production efficiency is low, and shape is unstable, in addition it is also necessary to multiple chemical vapour deposition, repeatedly adds
Work, causes cost to remain high, and strongly limit the application of carbon/carbon compound material.
Number of patent application is 201510298290.7, entitled high-speed railway EMUs pantograph pan composite wood
The patent application of material and preparation method thereof discloses a kind of chopped carbon fiber of weighing in proportion, phenol-formaldehyde resin powder, pitch coke powder, squama
Piece graphite powder, copper powder, pour into compressing in mould pressing die after alleged content of starting materials is well mixed, base substrate is successively put into Muffle furnace
In carry out pre-oxidation treatment, be put into carbide furnace in carry out carbonization treatment, be put into isothermal chemical vapor deposition stove in be densified
Process, be put into high temperature graphitization treatment furnace and carry out graphitization processing, that is, obtain pantograph pan composite, gained is answered
Condensation material is processed and obtains carbon/carbon compound material pantograph pan.When compressing in mould pressing die, its concrete technology
Parameter is as follows：Temperature：120~200 DEG C；Pressure：1~5MPa；Dwell time：2~5h., it is necessary to heat when being molded due to the method
Pressure device is hot-forming, particularly when large-sized product is made, it is necessary to great tonnage press, also, as inner vessel for electrical cooking-vessel this
The complex-shaped product of sample cannot be suppressed, therefore, it applies limited.
The content of the invention
It is an object of the invention to provide a kind of without the hot-forming carbon/carbon compound material electric cooker based on carbon fiber powder
Interior pot preparation method.
The present invention is adopted the following technical scheme that and realizes its goal of the invention, and a kind of carbon/carbon based on carbon fiber powder is combined
Material inner pan of electric cooker preparation method, it comprises the following steps：
(1) dispensing：By weight, ﹪~80 ﹪ of carbon fiber powder 30 is taken, thermosetting resin 15 ﹪~30 ﹪, the ﹪ of curing agent 1.2~
3 ﹪, ﹪~50 ﹪ of graphite powder 0, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum are 100 ﹪, and above-mentioned raw materials are mixed into equal
It is even；
The present invention step (1) in preferably dispensing be, by weight, carbon fiber powder 50 ﹪~65 ﹪, the ﹪ of thermosetting resin 15~
30 ﹪, ﹪~3.0 ﹪ of curing agent 1.2, ﹪~20 ﹪ of graphite powder 8, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum is
100 ﹪.
The granularity of the carbon fiber powder is 100 mesh~300 mesh；The graphite powder was the crystalline flake graphite of 800 mesh sieves；It is described
Thermosetting resin is phenolic resin；The curing agent is hexamethylenetetramine；The flow promortor is aerosil；
Be the surface smoothness for improving base substrate, make base substrate material more uniform, the present invention step (1) in, the raw material mix with
Afterwards, tumbling ball mill ball milling is put into 1 hour~5 hours.
(2) it is die-filling：By step (1) mixed raw material, it is fitted into jolt ramming in mould；
The present invention step (2) in, the mould includes formpiston, former, and cavity between formpiston, former is in electric cooker
Pot blank shape；The former or formpiston are provided with charging aperture, and gland is provided with charging aperture or gland is not installed.
Flexible silicon gum cover, the cavity between flexible silicon gum cover and former or formpiston are cased with formpiston of the present invention or former
It is inner pan of electric cooker blank shape, the die cavity between flexible silicon gum cover and formpiston or former is pressurizing chamber, is opened on formpiston or former
It is provided with the working hole for being pressurizeed to pressurizing chamber；During charging, pressurizing chamber is vacuumized by working hole first, make flexible silicon gum cover
It is close to formpiston or former；During solidification, pressurizing chamber is pressurizeed by working hole, it is 0.6MPa~8MPa to keep its pressure.
Of the present invention being pressurised into pressurizing chamber inflates pressurization by working hole to pressurizing chamber, or adds water or alcohol,
After being heated up using mould when solidifying, the saturated vapour pressure pressurization that water or alcohol gasification are produced.
To make the gas between the formpiston or former and flexible silicon gum cover pass in and out smoothness, formpiston of the present invention or former
The upper surface for being close to side with elastic silica gel set is provided with guide groove.
(3) solidify：Mould is placed at 100 DEG C~300 DEG C, is solidified 0.5 hour~5 hours；
(4) the demoulding：Mould is cooled down, the product in mould is taken out, that is, carbon/carbon compound material base substrate is obtained；It is described
The density of carbon/carbon compound material base substrate is 0.7g/ ㎝3~1.0g/ ㎝3, intensity meet operation circulation require；
(5) the product for (4) step being obtained is that carbon/carbon is obtained to be combined through chemical vapor deposition, machining, again chemical vapor deposition
Material inner pan of electric cooker, its density is 1.2g/ ㎝3~1.4g/ ㎝3, intensity is 40MPa~70MPa.
Due to using above-mentioned technical proposal, the present invention preferably realizes goal of the invention, using carbon fiber powder as enhancing
Material, resin is made up the inner pan of electric cooker base substrate of some strength of mould as curing agent, base substrate close to finished product size,
The consumption of raw material is reduced, amount of machining is greatly reduced, subsequent chemistry vapor deposition times and deposition is also greatly reduced
Cost, substantially increases labor productivity；Also, due to acupuncture need not be carried out, it is to avoid inner pan of electric cooker product surface is produced
Raw pin hole, the surface smoothness of product is greatly improved；As long as simultaneously as die-filling solidification, without hot-forming, also reduces electricity
The cost of manufacture of pot base substrate in rice cooker.
Brief description of the drawings
Fig. 1 is the embodiment of the present invention 1, the structural representation of embodiment 2；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the structural representation of the embodiment of the present invention 3；
Fig. 4 is the structural representation of the embodiment of the present invention 4.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
Embodiment 1：
A kind of carbon/carbon compound material inner pan of electric cooker preparation method based on carbon fiber powder, it comprises the following steps：
(1) dispensing：By weight, ﹪~80 ﹪ of carbon fiber powder 30 is taken, thermosetting resin 15 ﹪~30 ﹪, the ﹪ of curing agent 1.2~
3 ﹪, ﹪~50 ﹪ of graphite powder 0, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum are 100 ﹪, and above-mentioned raw materials are mixed into equal
It is even；
The present invention step (1) in preferably dispensing be, by weight, carbon fiber powder 50 ﹪~65 ﹪, the ﹪ of thermosetting resin 15~
30 ﹪, ﹪~3.0 ﹪ of curing agent 1.2, ﹪~20 ﹪ of graphite powder 8, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum is
100 ﹪.
The granularity of the carbon fiber powder is 100 mesh~300 mesh；The graphite powder was the crystalline flake graphite of 800 mesh sieves；It is described
Thermosetting resin is phenolic resin；The curing agent is hexamethylenetetramine；The flow promortor is aerosil；
Be the surface smoothness for improving base substrate, make base substrate material more uniform, the present invention step (1) in, the raw material mix with
Afterwards, tumbling ball mill ball milling is put into 1 hour~5 hours.
(2) it is die-filling：By step (1) mixed raw material, it is fitted into jolt ramming in mould；
As seen from Figure 1, Figure 2, the present invention step (2) in, the mould include formpiston 1, former 2, formpiston 1, former 2 it
Between cavity 3 be inner pan of electric cooker blank shape；The former 2 or formpiston 1 are provided with charging aperture 6, and pressure is provided with charging aperture 6
Lid 7 does not install gland 7.
(3) solidify：Mould is placed at 100 DEG C~300 DEG C, is solidified 0.5 hour~5 hours；
(4) the demoulding：Mould is cooled down, the product in mould is taken out, that is, carbon/carbon compound material base substrate is obtained；It is described
The density of carbon/carbon compound material base substrate is 0.7g/ ㎝3~1.0g/ ㎝3, intensity meet operation circulation require；
(5) the product for (4) step being obtained is that carbon/carbon is obtained to be combined through chemical vapor deposition, machining, again chemical vapor deposition
Material inner pan of electric cooker, its density is 1.2g/ ㎝3~1.4g/ ㎝3, intensity is 40MPa~70MPa.
The present embodiment step (1) in, by weight, take the ﹪ of carbon fiber powder 75, the ﹪ of thermosetting resin 22, curing agent
2.5 ﹪, the ﹪ of flow promortor 0.5, each component sum are 100 ﹪, and the granularity of the carbon fiber powder is 200 mesh, the thermosetting tree
Fat is phenolic resin, and the curing agent is hexamethylenetetramine, and the flow promortor is aerosil；Above-mentioned raw materials are mixed
After even, tumbling ball mill ball milling is put into 3 hours.Cavity 3 between formpiston 1, former 2 is inner pan of electric cooker blank shape and is in
Opening upwards, formpiston 1 is provided with charging aperture 6, does not install gland 7 on charging aperture 6.Raw material after ball milling pours into sky through charging aperture 6
In chamber 3, mould after reaching size requirement, is placed in 250 DEG C by jolt ramming, is solidified 3 hours；It is prepared into the ㎜ electric cookers of Ф 240
Interior pot base substrate, the density of prepared base substrate is 0.7g/ ㎝3, intensity meet operation circulation require.
The inner pan of electric cooker base substrate that will be prepared is through chemical vapor deposition, machining, i.e. preparation after chemical vapor deposition again
The carbon/carbon compound material inner pan of electric cooker product of the ㎜ of Ф 240 is obtained, its extrudate density is 1.25g/ ㎝3, intensity is 40MPa.
Using carbon fiber powder as reinforcing material, resin is made some strength to the present invention as curing agent by mould
Inner pan of electric cooker base substrate, base substrate reduces the consumption of raw material close to the size of finished product, greatly reduces amount of machining, also greatly
It is big to reduce subsequent chemistry vapor deposition times and deposition cost；Also, due to acupuncture need not be carried out, it is to avoid product surface
Pin hole is produced, the surface smoothness of product is greatly improved；As long as simultaneously as die-filling solidification, it is not necessary to manual acupuncture, carrying significantly
Labor productivity high, reduces carbon/carbon compound material inner pan of electric cooker base substrate cost of manufacture.
Embodiment 2：
Be the intensity for improving base substrate and product, the present invention step (1) in, by weight, take the ﹪ of carbon fiber powder 60, thermosetting tree
The ﹪ of fat 20, the ﹪ of curing agent 2.8, the ﹪ of graphite powder 17, the ﹪ of flow promortor 0.2, each component sum are 100 ﹪, through die-filling, solidification and de-
The ㎜ inner pan of electric cooker base substrates of Ф 240 are prepared into after mould, the density of prepared base substrate is 0.73g/ ㎝3, intensity meets operation stream
Turn to require.
The inner pan of electric cooker base substrate that will be prepared is through chemical vapor deposition, machining, i.e. preparation after chemical vapor deposition again
The carbon/carbon compound material inner pan of electric cooker product of the ㎜ of Ф 240 is obtained, its extrudate density is 1.28g/ ㎝3, intensity is 48MPa.
Remaining same embodiment 1.
Embodiment 3：
From the figure 3, it may be seen that the present invention step (1) in, by weight, take the ﹪ of carbon fiber powder 62, the ﹪ of thermosetting resin 20, curing agent
2.5 ﹪, the ﹪ of graphite powder 15, the ﹪ of flow promortor 0.5, each component sum are 100 ﹪；Step (2) in, former 2 be arranged on formpiston 1
On, for inner pan of electric cooker blank shape and in Open Side Down, former 2 is provided with charging aperture 6 to the cavity 3 between formpiston 1, former 2,
Gland 7 is installed on charging aperture 6.Raw material after mixing is poured into cavity 3 from charging aperture 6, jolt ramming after reaching size requirement, is covered
Upper press cover 7, then the mould openings that will be installed material and locked are placed upward；Then, mould is placed in 200 DEG C, solidification 4
Hour；The ㎜ inner pan of electric cooker base substrates of Ф 240 are prepared into, the density of prepared base substrate is 0.72g/ ㎝3, intensity meets operation stream
Turn to require.
The inner pan of electric cooker base substrate that will be prepared is through chemical vapor deposition, machining, i.e. preparation after chemical vapor deposition again
The carbon/carbon compound material inner pan of electric cooker product of the ㎜ of Ф 240 is obtained, its extrudate density is 1.26g/ ㎝3, intensity is 43MPa.
Remaining same embodiment 1.
Embodiment 4：
As shown in Figure 4, flexible silicon gum cover 4, flexible silicon gum cover 4 and former 2 or sun are cased with formpiston of the present invention 1 or former 2
Cavity 3 between mould 1 is inner pan of electric cooker blank shape, and the die cavity between flexible silicon gum cover 4 and formpiston 1 or former 2 is pressurization
The working hole 5 for being pressurizeed to pressurizing chamber is offered on chamber, formpiston 1 or former 2；During charging, first by 5 pairs of pressurizations of working hole
Chamber vacuumizes, and flexible silicon gum cover 4 is close to formpiston 1 or former 2；During solidification, pressurizing chamber is pressurizeed by working hole 5, keep it
Pressure is 0.6MPa~8MPa.
Of the present invention being pressurised into pressurizing chamber inflates pressurization by working hole 5 to pressurizing chamber, or adds water or alcohol,
After being heated up using mould when solidifying, the saturated vapour pressure pressurization that water or alcohol gasification are produced.
To make the gas between the formpiston or former and flexible silicon gum cover pass in and out smoothness, formpiston of the present invention 1 or the moon
The surface for being close to side with flexible silicon gum cover 4 on mould 2 is provided with guide groove.
The present invention step (1) in, by weight, take the ﹪ of carbon fiber powder 60, the ﹪ of thermosetting resin 22, the ﹪ of curing agent 2.5,
The ﹪ of graphite powder 15, the ﹪ of flow promortor 0.5, each component sum are 100 ﹪；Step (2) in, former 2 is securedly mounted on formpiston 1,
Flexible silicon gum cover 4 is cased with formpiston 1, former 2 is provided with charging aperture 6, gland 7 is installed on charging aperture 6, flexible silicon gum cover 4 with
Cavity 3 between former 2, gland 7 is inner pan of electric cooker blank shape and is in that Open Side Down, between flexible silicon gum cover 4 and formpiston 1
Die cavity be pressurizing chamber, the working hole 5 for being pressurizeed to pressurizing chamber is offered on formpiston 1 and valve 8 is provided with.During charging, first
Pressurizing chamber is vacuumized by working hole 5, flexible silicon gum cover 4 is close to formpiston 1, after charged, charging aperture 6 is covered with gland 7
And lock, then the mould openings that will be installed material and locked are placed upward；The present embodiment is subject to by working hole 5 to pressurizing chamber
The pressure of 3MPa.Then, mould is placed in 240 DEG C, is solidified 3 hours, pressure is kept during solidification；Air cooling, the demoulding, that is, prepare
The ㎜ inner pan of electric cooker base substrates of Ф 240 are obtained, the density of prepared base substrate is 0.92g/ ㎝3, intensity meet operation circulation require.
The inner pan of electric cooker base substrate that will be prepared is through chemical vapor deposition, machining, i.e. preparation after chemical vapor deposition again
The carbon/carbon compound material inner pan of electric cooker product of the ㎜ of Ф 240 is obtained, its extrudate density is 1.35g/ ㎝3, intensity is 65MPa.
Remaining same embodiment 1.
Embodiment 5：
After charged, alcohol is added to pressurizing chamber by working hole 5, and close valve 8, other are with embodiment 4.Due to 240
DEG C when, the saturated vapour pressure of alcohol is 6.07MPa, therefore, flexible silicon gum cover 4 is to the pressure of material during 240 DEG C of solidifications
6.07Mpa, also, enter when stove solidifies without connecing pressurization tracheae, it is easy to operate.The ㎜ of Ф 240 electricity meals are prepared into after air cooling, the demoulding
Pot base substrate in pot, the density of prepared base substrate is 0.97g/ ㎝3, intensity meet operation circulation require.
The inner pan of electric cooker base substrate that will be prepared is through chemical vapor deposition, machining, i.e. preparation after chemical vapor deposition again
The carbon/carbon compound material inner pan of electric cooker product of the ㎜ of Ф 240 is obtained, its extrudate density is 1.38g/ ㎝3, intensity is 70MPa.
Remaining same embodiment 1.
The present invention changes the different shape of formpiston 1 and former 2 and combines, it may also be used for the preparation of other bowl shaped parts.
Claims (7)
1. a kind of carbon/carbon compound material inner pan of electric cooker preparation method based on carbon fiber powder, it is characterized in that it includes following step
Suddenly：
(1) dispensing：By weight, ﹪~80 ﹪ of carbon fiber powder 30 is taken, thermosetting resin 15 ﹪~30 ﹪, the ﹪ of curing agent 1.2~
3 ﹪, ﹪~50 ﹪ of graphite powder 0, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum are 100 ﹪, and above-mentioned raw materials are mixed into equal
It is even；
The granularity of the carbon fiber powder is 100 mesh~300 mesh；The graphite powder was the crystalline flake graphite of 800 mesh sieves；The thermosetting
Property resin be phenolic resin；The curing agent is hexamethylenetetramine；The flow promortor is aerosil；
(2) it is die-filling：By step (1) mixed raw material, it is fitted into jolt ramming in mould；
(3) solidify：Mould is placed at 100 DEG C~300 DEG C, is solidified 0.5 hour~5 hours；
(4) the demoulding：Mould is cooled down, the product in mould is taken out, that is, carbon/carbon compound material base substrate is obtained；It is described
The density of carbon/carbon compound material base substrate is 0.7g/ ㎝3~1.0g/ ㎝3, intensity meet operation circulation require；
(5) the product for (4) step being obtained is that carbon/carbon is obtained to be combined through chemical vapor deposition, machining, again chemical vapor deposition
Material inner pan of electric cooker, its density is 1.2g/ ㎝3~1.4g/ ㎝3, intensity is 40MPa~70MPa.
2. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 1, it is characterized in that
Step (1) in, by weight, ﹪~65 ﹪ of carbon fiber powder 50, thermosetting resin 15 ﹪~30 ﹪, the ﹪ of curing agent 1.2~
3.0 ﹪, ﹪~20 ﹪ of graphite powder 8, ﹪~1.0 ﹪ of flow promortor 0.1, each component sum are 100 ﹪.
3. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 1, it is characterized in that
Step (1) in, after the raw material is mixed, put tumbling ball mill ball milling into 1 hour~5 hours.
4. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 1 or 2 or 3, its
Be characterized in step (2) in, the mould includes formpiston, former, and cavity between formpiston, former is inner pan of electric cooker base
Shape；The former or formpiston are provided with charging aperture, and gland is provided with charging aperture or gland is not installed.
5. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 4, it is characterized in that
Flexible silicon gum cover is cased with the formpiston or former, the cavity between flexible silicon gum cover and former or formpiston is inner pan of electric cooker base
Shape, the die cavity between flexible silicon gum cover and formpiston or former is pressurizing chamber, is offered on formpiston or former for pressurization
The working hole of chamber pressurization；During charging, pressurizing chamber is vacuumized by working hole first, elastic silica gel set is close to formpiston or the moon
Mould；During solidification, pressurizing chamber is pressurizeed by working hole, it is 0.6MPa~8MPa to keep its pressure.
6. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 5, it is characterized in that
Described being pressurised into pressurizing chamber inflates pressurization by working hole to pressurizing chamber, or adds water or alcohol, is molded using when solidifying
After mould heats up, the saturated vapour pressure pressurization that water or alcohol gasification are produced.
7. the carbon/carbon compound material inner pan of electric cooker preparation method of carbon fiber powder is based on according to claim 5 or 6, and it is special
The surface that levying is to be close to side with elastic silica gel set on the formpiston or former is provided with guide groove.
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