CN114670465B - Densification process and equipment for hot press forming of carbon fiber - Google Patents
Densification process and equipment for hot press forming of carbon fiber Download PDFInfo
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- CN114670465B CN114670465B CN202210259814.1A CN202210259814A CN114670465B CN 114670465 B CN114670465 B CN 114670465B CN 202210259814 A CN202210259814 A CN 202210259814A CN 114670465 B CN114670465 B CN 114670465B
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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
- 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
- B29C70/345—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 matched moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/14—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with screw or helix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
- B29C35/0294—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process using tempering units for temperature control of moulds or cores
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/041—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids
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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
- 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
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/465—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating by melting a solid material, e.g. sheets, powders of fibres
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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
- 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
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/041—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids
- B29C2035/042—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids other than water
- B29C2035/043—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids other than water oil
Abstract
The invention discloses a densification process and equipment for hot-press forming of carbon fiber, which belong to the technical field of carbon fiber processing, wherein the process comprises raw material mixing, layering, hot-press forming, high-temperature solidification carbonization, demolding, asphalt dipping, carbonization, naphthalene in-situ asphalt dipping polymerization, high-temperature high-pressure carbonization, graphitization and surface coating, the equipment comprises a V-shaped stirrer and a hot-press die, the tops of feed channels on two sides of the V-shaped stirring cylinder are provided with feed inlets, the bottom of the V-shaped stirring cylinder is provided with a discharge outlet, the upper wall plate of the V-shaped stirring cylinder is hinged with a baffle plate, the lower wall plate of the V-shaped stirring cylinder is provided with a baffle plate, the lower wall plate is provided with a scraper plate assembly, and a stirring assembly is arranged above the discharge outlet of the V-shaped stirring cylinder; the hot pressing mould includes the mounting bracket, and the roof below of mounting bracket is provided with the heating portion, and upper heating portion below is provided with carbon and goes up the mould, and carbon goes up the mould below and is provided with carbon bed die, and carbon bed die below is provided with the heating portion down, and carbon bed die below is provided with the jacking cylinder.
Description
Technical Field
The invention relates to the technical field of carbon fiber processing, in particular to a densification process and equipment for carbon fiber hot press molding.
Background
Carbon fiber/carbon (C) f The composite material of the (C) has excellent performances of high specific strength, high specific modulus, material structural designability, high strength retention rate at high temperature and the like, and is widely applied to the fields of military, aerospace and the like. C (C) f The strength and the elastic modulus of the composite material at normal temperature are good, steel and various metals can be replaced, and the tensile strength of the Cf/C composite material at present is superior to that of high-quality steel; the Cf/C composite material not only has the advantages of other composite materials but also has the uniqueness: because the system is composed of carbon elements, the carbon atoms have extremely strong affinity with each other, so that the Cf/C composite material has very good stability at low temperature and high temperature; the density is less than 2.0g/cm3, which is only 1/4 of the nickel-based superalloy, and 1/2 of the ceramic material; the ablation resistance is good, and the ablation uniformity can bear high temperature higher than 3000 ℃; excellent friction and wear resistance, small friction coefficient and stable performance, and is one of the best candidate materials for various wear-resistant and friction parts.
At present, C f Most of the composite materials are prepared by Chemical Vapor Deposition (CVD), chemical Vapor Infiltration (CVI) or carbonization after pitch and resin impregnation, but the processes all require multiple expensive densification and have long period, which inevitably leads to C f The great increase of the cost of the/C composite material can only be applied to the fields of high technology and high investment such as aviation and aerospace, and the application of the material with excellent performance to other fields is limited, so that a plurality of researchers are focused on starting from raw materials and processes, and shortening the preparation period of the material by various ways so as to reduce C f Cost of the/C composite.
C f After the oxidation-resistant coating of the composite material/C is successfully developed, the composite material can be repeatedly used under the oxidation atmosphere, so that the composite material/C becomes an excellent ablation-resistant material and also becomes a high-temperature-resistant structural material, and becomes the key point of research and development of the advanced composite material at present. But C is f There are also problems with the/C composite that limit its application, and the main problem at present is the unsatisfactory performance of the various densification processes and impregnants commonly used.
Therefore, a densification process for hot-press forming of carbon fiber is explored, and rapid manufacturing is realizedStandby C f The composite material achieves the effects of reducing densification period and material cost, and has better economic and social benefits.
Disclosure of Invention
The invention aims to solve the problems and provide a densification process and equipment for hot press forming of carbon fiber by
In order to achieve the above purpose, the invention adopts the following technical scheme: a carbon fiber hot-press molding densification process comprises the following steps:
A. mixing raw materials: short fiber, petroleum coke powder, high-temperature asphalt powder and epoxy resin according to the following ratio of 7.5:1:1:0.5 mixing by adopting a V-shaped stirrer;
B. hot press molding after layering: placing the mixed material into a hot-pressing mold for hot-pressing molding, wherein the hot-pressing technological parameters are that the temperature is 300 ℃ and the duration is 20-30min, an upper heating part (18) and a lower heating part (20) of the hot-pressing mold are heated by heat conducting oil, and a heat source is generated by burning gas and heavy oil generated after carbonization;
C. high-temperature curing carbonization: after reaching the carbonization furnace, putting the product into the furnace through a cantilever manipulator, and changing heavy oil and combustible gas generated in pressure curing into a hot press and an impregnation heat source through a burner, wherein the high-temperature curing temperature is 700-1400 ℃ and the duration is 20-40 hours;
D. demolding: hanging out the material by a cantilever manipulator after high-temperature curing and carbonization, and demolding the material;
E. asphalt impregnation-carbonization-naphthalene in-situ asphalt impregnation polymerization-high-temperature high-pressure carbonization: the dipping tank adopts petroleum asphalt and coal asphalt as melting tanks, the dipping temperature is 200-350 ℃, and the dipping pressure is not less than 0.5MPa; F. graphitization-surface coating: graphitizing at 2000-3000 deg.c to form MoSi surface coating 2 SiC, si and AL 2 O 3 The mixed powder is used as a seepage material, and MoSi prepared on the surface of the product by adopting a high-temperature embedding impregnation method 2 SiC composite coating.
In addition, the invention also discloses a device for densifying the carbon fiber through hot-press forming, which comprises a V-shaped stirrer and a hot-press die, wherein two sides of a V-shaped stirring cylinder of the V-shaped stirrer are connected and installed with a driving motor of an installation seat through a rotating shaft; the hot pressing mould includes the mounting bracket, and the roof below of mounting bracket is provided with the heating portion, and upper heating portion below is provided with the carbon and goes up the mould, and carbon goes up the mould below and is provided with carbon bed die, and carbon bed die below is provided with the heating portion down, and carbon bed die below is provided with the jacking cylinder.
Further, the side face of the baffle block facing to one side of the feed inlet is of an inclined surface structure, and the side wall of the other side of the baffle block is in contact with the side wall of the bottom of the baffle plate.
Further, the scraper blade subassembly is including the interval setting in the mounting panel of lower wallboard inner wall, is provided with the sliding shaft between two mounting panels, and the last slip of sliding shaft is provided with the scraper blade.
Further, the side surface of the mounting plate facing the feed inlet is of an inclined surface structure; the scraper blade is provided with the balancing weight on the scraper blade, and one surface of scraper blade and lower wallboard inner wall contact is the cockscomb structure.
Further, the stirring assembly comprises a stirring shaft arranged above the discharge hole, two ends of the stirring shaft are connected with bearing seats, the bearing seats are arranged on the inner walls of the lower wall plates on two sides, and stirring blades are arranged on the stirring shaft.
Further, a connecting rod is arranged on the stirring shaft, and a stirring plate is arranged at the tail end of the connecting rod; the stirring blade is a helical blade.
Further, the V-shaped notch is formed in the bottom of the stirring plate, and the balancing weight is arranged on the stirring plate.
Further, a sealing piece is arranged below the carbon-carbon upper die and matched with a sealing part on the carbon-carbon lower die to form sealing self-locking, and heat conduction oil is contained in both the upper heating part and the lower heating part.
The invention has the beneficial effects that:
1. in the prior art of densification of carbon fibers, raw materials are woven, the production period of the process is long, 10-15 hours are needed for producing a block, and the density of a blank is only 0.45. The hot press molding process can realize rapid molding, can effectively improve the production efficiency of blanks and greatly shorten the processing time.
2. The hot-pressing die in the production equipment adopts a carbon-carbon die to provide basic mechanical properties, and associates ensure that the die is not deformed at high temperature; heavy oil and combustible gas generated by the carbonization furnace are recycled, so that the method is environment-friendly and energy-saving; in addition, 2 kinds of asphalt, namely asphalt and naphthalene in-situ asphalt, can be adopted to realize rapid densification and improve the product performance.
3. The V-shaped stirring barrel of the V-shaped stirrer is internally provided with the baffle plate assembly, the scraping plate assembly and the stirring assembly, so that the material blocking effect, the wall scraping effect and the stirring effect are respectively realized. Wherein baffle plate of baffle subassembly is for articulating in the last wallboard of V-arrangement churn, and the baffle can swing when the V-arrangement churn rotates, baffle bottom and dog contact can block the inside material of V-arrangement churn to realize the concentration of material, in order to improve the efficiency of stirring and mixing.
The scraper blade of scraper blade subassembly is last to be provided with the balancing weight, and when V-arrangement churn rotated, the scraper blade can slide on the sliding shaft under the effect of centrifugal force, and then realizes the scraping effect to lower wallboard, reduces the phenomenon of residue deposit caking on the lower wallboard.
The stirring subassembly includes the (mixing) shaft, is provided with helical stirring vane on the (mixing) shaft, and the (mixing) shaft still is connected with the stirring board through the connecting rod, is provided with the balancing weight on the stirring board, and the V-arrangement breach has been seted up to the stirring board bottom, and when V-arrangement churn rotated, the stirring board drove the (mixing) shaft under the effect of centrifugal force and rotated, and then drove stirring vane and stir the mixture with the material, can save agitator motor's structure and reach energy-conserving effect.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
FIG. 1 is a schematic diagram of a process layout of the present invention.
FIG. 2 is a schematic diagram of the process flow of the pitch impregnation-carbonization-naphthalene in-situ pitch impregnation polymerization of the present invention.
Fig. 3 is a schematic view of the overall structure of the V-blender of the present invention.
Fig. 4 is a schematic view of the internal structure of the V-shaped stirring cylinder of the present invention.
Fig. 5 is a schematic structural view of the stirring assembly of the present invention.
Fig. 6 is a schematic view of the structure of the squeegee assembly of the present invention.
Fig. 7 is a schematic structural view of a hot press mold according to the present invention.
The text labels in the figures are expressed as: 1. a mounting base; 2. a rotating shaft; 3. a feed inlet; 4. v-shaped stirring cylinder; 5. a discharge port; 6. a stop block; 7. a baffle; 8. a scraper; 9. a stirring shaft; 10. an upper wall plate; 11. a lower wall plate; 12. a bearing seat; 13. stirring blades; 14. a connecting rod; 15. a stirring plate; 16. a mounting plate; 17. a sliding shaft; 18. an upper heating part; 19. a mounting frame; 20. a lower heating part; 21. a sealing plate; 22. jacking the air cylinder; 23. a carbon-carbon upper die; 24. carbon lower die.
Detailed Description
The invention is further illustrated by the following examples.
A carbon fiber hot-press molding densification process comprises the following steps:
A. mixing raw materials: short fiber, petroleum coke powder, high-temperature asphalt powder and epoxy resin according to the following ratio of 7.5:1:1:0.5 mixing by adopting a V-shaped stirrer;
B. hot press molding after layering: placing the mixed material into a hot-pressing mold for hot-pressing forming, wherein the hot-pressing process parameters are that the temperature is 300 ℃ and the duration is 20-30min, the upper heating part 18 and the lower heating part 20 of the hot-pressing mold are heated by heat conducting oil, and a heat source is generated by burning gas and heavy oil generated after carbonization;
C. high-temperature curing carbonization: after reaching the carbonization furnace, putting the product into the furnace through a cantilever manipulator, and changing heavy oil and combustible gas generated in pressure curing into a hot press and an impregnation heat source through a burner, wherein the high-temperature curing temperature is 700-1400 ℃ and the duration is 20-40 hours;
D. demolding: hanging out the material by a cantilever manipulator after high-temperature curing and carbonization, and demolding the material;
E. asphalt impregnation-carbonization-naphthalene in-situ asphalt impregnation polymerization-high-temperature high-pressure carbonization: the dipping tank adopts petroleum asphalt and coal asphalt as melting tanks, the dipping temperature is 200-350 ℃, and the dipping pressure is not less than 0.5MPa; F. graphitization-surface coating: graphitizing at 2000-3000 deg.c to form MoSi surface coating 2 SiC, si and AL 2 O 3 The mixed powder is used as a seepage material, and MoSi prepared on the surface of the product by adopting a high-temperature embedding impregnation method 2 SiC composite coating.
In addition, the invention also discloses a device for densifying the carbon fiber through hot-press forming, which comprises a V-shaped stirrer and a hot-press die, wherein two sides of a V-shaped stirring cylinder 4 of the V-shaped stirrer are connected and installed with a driving motor of an installation seat 1 through a rotating shaft 2; the hot pressing die comprises a mounting frame 19, an upper heating part 18 is arranged below a top plate of the mounting frame 19, a carbon-carbon upper die 23 is arranged below the upper heating part 18, a carbon-carbon lower die 24 is arranged below the carbon-carbon upper die 23, a lower heating part 20 is arranged below the carbon-carbon lower die 24, and a jacking cylinder 22 is arranged below the carbon-carbon lower die 24.
Preferably, as shown in fig. 1 and 6, the side surface of the stopper 6 facing the feed inlet 3 is in an inclined structure, and the side wall of the other side of the stopper 6 contacts with the side wall of the bottom of the baffle 7.
Preferably, referring to fig. 4 and 6, the scraper assembly includes mounting plates 16 disposed on the inner wall of the lower wall plate 11 at intervals, a sliding shaft 17 is disposed between the two mounting plates 16, and a scraper 18 is slidably disposed on the sliding shaft 17. The side surface of the mounting plate 16 facing the feed inlet 3 is of an inclined surface structure; the surface of the scraping plate 18, which is contacted with the inner wall of the lower wall plate 11, is of a saw-tooth structure, and a balancing weight is arranged on the scraping plate 18.
The baffle 6 and one side of the mounting plate 16 are of inclined structures, so that the material can flow conveniently, and the resistance to the material is reduced. Meanwhile, the other side surfaces of the two can also cooperate with the baffle 7 to play a role in blocking materials, so that the materials are prevented from causing too large impact on the sealing cover of the discharge hole under the action of centrifugal force.
Preferably, referring to fig. 4, 5 and 6, the stirring assembly includes a stirring shaft 9 disposed above the discharge hole 5, two ends of the stirring shaft 9 are connected to bearing seats 12, the bearing seats 12 are disposed on inner walls of lower wall plates 11 on two sides, and stirring blades 13 are disposed on the stirring shaft 9. A connecting rod 14 is arranged on the stirring shaft 9, and a stirring plate 15 is arranged at the tail end of the connecting rod 14; the stirring blade 13 is a helical blade. The bottom of the stirring plate 15 is provided with a V-shaped notch, and the stirring plate 15 is provided with a balancing weight.
Preferably, as shown in fig. 7, a sealing member 21 is disposed below the carbon-carbon upper mold 23 and cooperates with a sealing portion on the carbon-carbon lower mold 24 to form a seal self-lock, and the upper heating portion 18 and the lower heating portion 20 each contain heat conducting oil.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been described herein and the above examples have been presented only to assist in understanding the method of the present invention and its core ideas; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (6)
1. The hot-press forming densification process for the carbon fiber is characterized by comprising the following steps of:
A. mixing raw materials: short fiber, petroleum coke powder, high-temperature asphalt powder and epoxy resin according to the following ratio of 7.5:1:1: mixing with V-shaped stirrer in the ratio of 0.5;
B. hot press molding after layering: placing the mixed material into a hot-pressing mold for hot-pressing molding, wherein the hot-pressing technological parameters are that the temperature is 300 ℃ and the duration is 20-30min, an upper heating part (18) and a lower heating part (20) of the hot-pressing mold are heated by heat conducting oil, and a heat source is generated by burning gas and heavy oil generated after carbonization;
C. high-temperature curing carbonization: after reaching the carbonization furnace, placing the product into the furnace through a cantilever manipulator, and changing heavy oil and combustible gas generated in pressure curing into an impregnation heat source of a hot press through a burner, wherein the high-temperature curing temperature is 700-1400 ℃ and the duration is 20-40 hours;
D. demolding: hanging out the material by a cantilever manipulator after high-temperature curing and carbonization, and demolding the material;
E. asphalt impregnation-carbonization-naphthalene in-situ asphalt impregnation polymerization-high-temperature high-pressure carbonization: the dipping tank adopts petroleum asphalt and coal asphalt as melting tanks, the dipping temperature is 200-350 ℃, and the dipping pressure is not less than 0.5MPa;
F. graphitization-surface coating: graphitizing at 2000-3000 deg.c to form MoSi surface coating 2 SiC, si and AL 2 O 3 The mixed powder is used as a seepage material, and MoSi is prepared on the surface of the product by adopting a high-temperature embedding impregnation method 2 A SiC composite coating;
the densification process adopts a device for densification of carbon fibers by hot-press forming, and comprises a V-shaped stirrer and a hot-press die, wherein two sides of a V-shaped stirring cylinder (4) of the V-shaped stirrer are connected and installed with a driving motor of a mounting seat (1) through a rotating shaft (2), a feeding hole (3) is formed in the top of a feeding channel at two sides of the V-shaped stirring cylinder (4), a discharging hole (5) is formed in the bottom of the V-shaped stirring cylinder (4), a baffle plate (7) is hinged to an upper wall plate (10) of the V-shaped stirring cylinder (4), a stop block (6) is arranged on a lower wall plate (11) of the V-shaped stirring cylinder (4), a scraping plate component is arranged on the lower wall plate (11), and a stirring component is arranged above the discharging hole (5) of the V-shaped stirring cylinder (4); the hot-pressing die comprises a mounting frame (19), an upper heating part (18) is arranged below a top plate of the mounting frame (19), a carbon-carbon upper die (23) is arranged below the upper heating part (18), a carbon-carbon lower die (24) is arranged below the carbon-carbon upper die (23), a lower heating part (20) is arranged below the carbon-carbon lower die (24), and a jacking cylinder (22) is arranged below the carbon-carbon lower die (24);
the side surface of the stop block (6) facing one side of the feed inlet (3) is of an inclined surface structure, and the side wall of the other side of the stop block (6) is contacted with the side wall of the bottom of the baffle (7);
the scraper assembly comprises mounting plates (16) arranged on the inner wall of the lower wall plate (11) at intervals, a sliding shaft (17) is arranged between the two mounting plates (16), and a scraper (8) is arranged on the sliding shaft (17) in a sliding mode.
2. The densification process of hot press forming of carbon fiber according to claim 1, wherein the side of the mounting plate (16) facing the feed inlet (3) has an inclined surface structure; one surface of the scraping plate (8) contacted with the inner wall of the lower wall plate (11) is of a saw-tooth structure, and a balancing weight is arranged on the scraping plate (8).
3. The densification process of claim 1, wherein the stirring assembly comprises a stirring shaft (9) arranged above the discharge port (5), two ends of the stirring shaft (9) are connected with bearing blocks (12), the bearing blocks (12) are arranged on inner walls of lower wall plates (11) on two sides, and stirring blades (13) are arranged on the stirring shaft (9).
4. A carbon fiber hot-press forming densification process according to claim 3, characterized in that the stirring shaft (9) is provided with a connecting rod (14), and the tail end of the connecting rod (14) is provided with a stirring plate (15); the stirring blade (13) is a helical blade.
5. The densification process for hot press forming of carbon fiber according to claim 4, wherein the bottom of the stirring plate (15) is provided with a V-shaped notch, and the stirring plate (15) is provided with a balancing weight.
6. The densification process of claim 1, wherein a sealing member (21) is disposed below the upper carbon-carbon mold (23) and is matched with a sealing portion on the lower carbon-carbon mold (24) to form a seal self-lock, and the upper heating portion (18) and the lower heating portion (20) are both filled with heat conducting oil.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5614134A (en) * | 1992-01-24 | 1997-03-25 | Nippon Oil Company, Limited | Process for preparing carbon/carbon composite preform and carbon/carbon composite |
| CN206381564U (en) * | 2017-01-16 | 2017-08-08 | 宿迁圣力佳合体育用品有限公司 | The full-automatic forming machine of carbon badminton racket, tennis racket |
| CN108046821A (en) * | 2018-01-24 | 2018-05-18 | 航天睿特碳材料有限公司 | A kind of preparation method of polycrystalline silicon ingot or purifying furnace carbon carbon lid plate |
| CN109180193A (en) * | 2018-08-20 | 2019-01-11 | 广州晶石碳纤新材料有限公司 | A kind of carbon fiber reinforced carbon-silicon carbide friction material and its preparation method and application |
| CN209350916U (en) * | 2018-12-11 | 2019-09-06 | 江苏三强复合材料有限公司 | A kind of molding die of the same with thermosetting compound material for aerospace |
| CN112717799A (en) * | 2020-12-17 | 2021-04-30 | 湖州倍格曼新材料股份有限公司 | Sealed agitating unit that uses of high thixotropic polyurethane with antidetonation function |
| CN215795240U (en) * | 2021-09-01 | 2022-02-11 | 广东甜味食品有限公司 | Chocolate raw material cylinder with scraper type cleaning mechanism |
-
2022
- 2022-03-16 CN CN202210259814.1A patent/CN114670465B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5614134A (en) * | 1992-01-24 | 1997-03-25 | Nippon Oil Company, Limited | Process for preparing carbon/carbon composite preform and carbon/carbon composite |
| CN206381564U (en) * | 2017-01-16 | 2017-08-08 | 宿迁圣力佳合体育用品有限公司 | The full-automatic forming machine of carbon badminton racket, tennis racket |
| CN108046821A (en) * | 2018-01-24 | 2018-05-18 | 航天睿特碳材料有限公司 | A kind of preparation method of polycrystalline silicon ingot or purifying furnace carbon carbon lid plate |
| CN109180193A (en) * | 2018-08-20 | 2019-01-11 | 广州晶石碳纤新材料有限公司 | A kind of carbon fiber reinforced carbon-silicon carbide friction material and its preparation method and application |
| CN209350916U (en) * | 2018-12-11 | 2019-09-06 | 江苏三强复合材料有限公司 | A kind of molding die of the same with thermosetting compound material for aerospace |
| CN112717799A (en) * | 2020-12-17 | 2021-04-30 | 湖州倍格曼新材料股份有限公司 | Sealed agitating unit that uses of high thixotropic polyurethane with antidetonation function |
| CN215795240U (en) * | 2021-09-01 | 2022-02-11 | 广东甜味食品有限公司 | Chocolate raw material cylinder with scraper type cleaning mechanism |
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