CN110712383A - Device and method for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation - Google Patents
Device and method for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation Download PDFInfo
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- CN110712383A CN110712383A CN201910975988.6A CN201910975988A CN110712383A CN 110712383 A CN110712383 A CN 110712383A CN 201910975988 A CN201910975988 A CN 201910975988A CN 110712383 A CN110712383 A CN 110712383A
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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
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
- B29C70/506—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
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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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
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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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
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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
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2029/00—Belts or bands
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Abstract
The invention relates to a resin matrix composite material, in particular to a device and a method for preparing a carbon fiber thermoplastic impregnation belt by impregnating water-based powder. The device sequentially comprises a pay-off device, a carbon fiber surface treatment device, a water-based powder suspension impregnation device, a contact type drying device, a melting impregnation forming device, a calendering device and a traction device; the water-based powder suspension liquid impregnating device comprises a slurry impregnating device, a liquid storage device and a liquid supplementing device. Compared with dry powder impregnation, the method reduces the risk of explosion of dust in fire and avoids the pollution of dust in the processing process. Compared with the melting method, the processing temperature is reduced, and the resin aging caused by long-time retention of the melt in the impregnation cavity is avoided.
Description
Technical Field
The invention relates to a resin matrix composite material, in particular to a device and a method for preparing a carbon fiber thermoplastic impregnation belt by impregnating water-based powder.
Background
As a novel structural material with the characteristics of high strength, high modulus, low density, corrosion resistance, easiness in processing and the like, the continuous fiber reinforced thermoplastic resin-based composite material, in particular the continuous carbon fiber reinforced high-performance thermoplastic composite material, shows a good application prospect in the fields of aviation, aerospace, automobiles, rail transit, petroleum and natural gas and the like. The high-performance thermoplastic composite material refers to high-performance special engineering plastics, such as polyether ketone, polyether ether ketone, polyphenylene sulfide and the like.
The preparation process of the continuous fiber reinforced thermoplastic prepreg tape comprises powder impregnation, melt pultrusion impregnation, a solution impregnation method, membrane-felt lamination, fiber mixed weaving, pull weaving and the like. Powder impregnation includes dry powder impregnation and wet powder impregnation.
The dry powder impregnation method comprises the steps of spraying powder resin onto fiber bundles to obtain powder impregnated fiber bundles, passing the powder impregnated fiber bundles through a preheater to obtain impregnated fiber bundles, spraying the impregnated fiber bundles through gas flame into a hot machine head or melting the impregnated fiber bundles through electric heating, and drawing the impregnated fiber bundles out of the machine head through a tractor to obtain the prepreg tape.
The wet powder impregnation process is to make thermoplastic resin powder and some surfactant form water suspension in an impregnation chamber, draw continuous fiber through the resin suspension to make resin powder penetrate between fibers uniformly, then make fiber bundle attached with resin powder pass through a dewatering and drying device, then heat and melt, cool, and obtain the required prepreg tape or cut into long fiber reinforced granules.
Powder impregnation is the most common method for high performance resin matrices with high melting point and high melt viscosity. The powder impregnation technology improves the flexibility of the design and preparation of the thermoplastic composite material, and facilitates the subsequent hot-press molding and pultrusion process.
Wangzhonggang, Zheng Anna and other people take out glass fiber untwisted roving bundles from a yarn roll and enter a powder tank through a guide roller, the powder tank is filled with polypropylene resin powder and is provided with an impregnation roller, the impregnation roller aims to disperse the glass fiber bundles and simultaneously cause the resin powder to generate static electricity due to friction so as to be adsorbed around monofilament fibers, and the part is the key point of the quality of the whole impregnation. After the powder is dispersed in the fiber, the fiber bundle is drawn into a heating drying tunnel, and the powder absorbs heat and is fused and bonded into a whole. The lateral pressure created by the pins causes the resin to bond tightly and redistribute, further increasing the degree of impregnation. And after cooling by a cooling roller, rolling the pre-impregnation belt to finish impregnation. The method is a dry powder impregnation process, preheating is a heating drying channel without any built-in parts, the method is not suitable for wet impregnation, two pins are adopted for molding, and an impregnation belt is difficult to keep the surface smooth and flat. This method is clearly different from the wet impregnation of the present invention.
Chinese patent CN109070391A discloses a method for manufacturing a fibre material pre-impregnated with a thermoplastic polymer in a fluidized bed. It suspends the polymer powder in the gas of a vulcanization tank, further controlling the fiber content of the prepreg by controlling the contact time of the fibers with the powder. The pre-impregnated fibers exit the curing tank and are passed through one or more heated calenders to calender and form a prepreg tape material for use in the manufacture of three-dimensional composite parts. The patent is to eliminate any form of static electricity and solvents during the preparation process. The preparation process has the disadvantages of uneven polymer powder distribution and easy generation of dust explosion danger.
Chinese patent CN110087847A discloses a method for manufacturing a fibre material pre-impregnated with a thermoplastic polymer in powder form by spraying. Thermoplastic polymer powder is sprayed onto the fibres using one or more spray guns (nozzles) and the amount of polymer powder sprayed onto the fibrous material is controlled by the speed of the spray. This patent would result in an uneven distribution of powder sprayed on the fibrous material.
Chinese patent CN108214980A discloses an apparatus and method for preparing continuous fiber reinforced thermoplastic prepreg tape, which comprises powder coating fibers, heating, melting, rolling, calculating fiber content by measuring the thickness of the prepreg, feeding data back to a computer, and performing powder coating twice or more until the fiber content reaches a target value. The impregnated tape prepared by the patent is uneven in resin impregnation, the fiber content is judged by measuring the thickness of the prepreg, and the error is large.
Chinese patent CN108359216A discloses a continuous fiber reinforced polyetheretherketone resin and a molding method thereof. Preparing a premix from PEEK and a dispersing agent by using a high-speed dispersion machine, preparing a dispersion liquid from the premix, a suspending agent and purified water by using the high-speed dispersion machine, putting the dispersion liquid into an impregnation tank with an ultrasonic device, allowing continuous fibers to pass through the impregnation tank, dispersing under the action of ultrasonic waves, and controlling the amount of a suspension liquid adsorbed on the fibers by using gaps between the continuous fibers through a pair of rollers. And finally, drying, melting and rolling to obtain the continuous fiber reinforced polyether-ether-ketone material. The dispersion prepared by the patent is unstable, the ultrasonic effect is small, and the resin can be precipitated for a long time.
The suspension method by the person of the King forces, and the like, is to dissolve epoxy resin in acetone of the same volume to prepare a dilute solution A, and also to dissolve low molecular weight polyterephthalamide in acetone of the same volume to prepare a dilute solution B. The diluted solution A, B is mixed in equal volume, and is dropped into the circulating water of the colloid mill together with the surfactant to prepare the epoxy resin emulsion. Wherein, the epoxy resin is used as an adhesive to combine the PPS powder and the fiber felt together. Due to the coating effect of the epoxy resin on the PPS powder, the oxidative crosslinking of PPS can be prevented. Pot life of this emulsion was about 20 h. Adding organic solvent soaked high molecular weight PPS into epoxy resin emulsion, circulating in a colloid mill for 10min, and adding aqueous solution of polyacrylamide as a stabilizer to prepare suspension. The reinforcing material of the method is a long glass felt with the length of 50mm, the suspension is epoxy resin-acetone dilute solution, organic solvent and PPS powder, the impregnation is only to soak the glass fiber felt in the suspension, and the composite material is formed into hot-press molding. Is completely different from the continuous carbon fiber, the water-based suspension and the hot roll forming of the invention.
Chinese patent CN104031376A discloses a continuous carbon fiber reinforced poly (arylene ether nitrile) resin-based composite material with a heteronaphthalene biphenyl structure and a preparation method thereof. Dissolving the poly (arylene ether nitrile) resin with the heteronaphthalene biphenyl structure in a specific organic solvent to prepare a resin solution with the mass percentage concentration of 5-40%, impregnating continuous carbon fibers in the resin solution, removing the solvent through a drying process, cutting to prepare prepreg sheets, paving corresponding layers of prepreg sheets according to the thickness of the composite material, then performing hot press molding, and demolding to prepare the poly (arylene ether nitrile) resin-based composite material with the continuous carbon fiber reinforced heteronaphthalene biphenyl structure. The retention rates of the bending strength, the bending modulus and the interlaminar shear strength of the composite material at 250 ℃ can respectively reach 56%, 96% and 60%. The method has practical value for promoting the development of advanced composite materials and developing the application of continuous carbon fiber reinforced high-performance thermoplastic resin matrix composite materials in the field of aerospace. The patent is a solution method, carbon fibers are put into a resin matrix solution for impregnation, and then dried to remove a solvent, and any impregnation element and other impregnation devices are not needed.
The Yanggui preparation is prepared with water as medium, PPS powder, OP-10, polyglycol, methyl cellulose and alcohol in certain proportion, and through mixing and grinding in a colloid mill to obtain stable PPS suspension. And (3) passing the continuous carbon fibers through the PPS suspension, drying, melting and winding to form non-woven cloth, cutting, and then carrying out hot press molding on the unidirectional layering to obtain the unidirectional long fiber composite material. Or crushing the carbon fiber into short fiber with the diameter of less than 5mm, then uniformly mixing the short fiber with the PPS suspension, filtering out water by pumping, drying and then carrying out hot press molding. Although the method is a suspension method, only continuous carbon fibers and PPS suspension are mixed, and the mixture is dried, cut, layered and hot-pressed to form the unidirectional long fiber reinforced PPS plate or sheet. The continuous carbon fiber reinforced prepreg tape is obtained by performing suspension powder impregnation, drying and thermal forming on continuous carbon fibers by three rolling shaft devices which are arranged in an up-and-down fluctuating manner. The two have great difference in device structure and preparation process.
Chinese patent CN104441323A discloses a melt feeding device, a continuous fiber reinforced thermoplastic impregnated tape forming device and a method, belonging to the technical field of preparation of continuous fiber reinforced thermoplastic resin matrix composite materials, the melt feeding device comprises a main runner, the main runner is sequentially communicated with a primary runner, a secondary runner and a tertiary runner, the primary runner is divided from the main runner and is distributed in parallel along the main runner; the continuous fiber reinforced thermoplastic impregnating belt forming device comprises an impregnating unit, wherein the melt feeding device and the impregnating roller are arranged in the impregnating unit, and the first downward pressing impregnating roller in the feeding direction is arranged right above a main runner of the melt feeding device; the molding method of the continuous fiber reinforced thermoplastic impregnated belt comprises the steps of preheating pre-dispersion, preheating tensioning, impregnation, glazing cooling, collecting and the like. In the method, the device has simple structure, high fiber preheating speed and high efficiency, reduces the flow resistance and heating time of the melt, and has good fiber infiltration effect of the prepreg tape. This patent describes a pre-heated pre-dispersion, feeding and melt impregnation of a melt impregnation device. The invention adopts powder impregnation, the impregnation device does not need heating, the fiber bundle firstly passes through the suspension liquid and is effectively dispersed and spread, and the resin powder coats the fiber. The drying device dries the fiber bundles full of resin powder without dispersion, which is different from the main functions of preheating and pre-dispersion in the patent. The melting and shaping device has no melt feeding device except the resin adhered to the fiber bundle and no other resin. The roll shaft only presses the upper surface and the lower surface of the prepreg tape for multiple times, so that on one hand, the impregnation between the resin and the carbon fiber is improved, on the other hand, the two surfaces of the prepreg tape are polished, and the surface roughness of the prepreg tape is improved. This is in stark contrast to complete immersion of the fiber bundle in a resin melt to enhance resin and fiber impregnation.
The preparation device for impregnating the high-performance thermoplastic composite material with continuous carbon fiber suspension powder at present has the following obvious defects: firstly, after the fiber bundle is soaked in the slurry, the fiber bundle is dried by adopting a drying channel, hot air or infrared heating. The drying mode has low heat exchange efficiency, long channel size and large occupied area; secondly, the fiber bundle is heated, dried and melted after being soaked in the pulp, and the fiber is soaked by the melted resin through rolling of a pair of rollers, so that the soaking elements are few and the effect is poor; thirdly, along with the prolonging of the preparation time of the prepreg tape, a large amount of resin powder is attached to the fiber bundles and is taken away from the pulp soaking tank, the content of the resin in the tank is continuously reduced, the content of the resin in the prepreg tape is influenced, and a liquid supplementing device is not used for supplementing the resin powder; in addition, when the fiber bundle is pulled out of the slurry, the slurry on the fiber bundle drops due to its own weight, so that the resin content under the fiber bundle is high and the excess slurry needs to be hung up.
How to effectively solve the obvious defects of the preparation device in the aspects of drying after the fiber bundle is soaked, rolling by two rollers, constant content of suspension resin powder, dripping of the slurry on the fiber bundle and the like is a problem which needs to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a device and a method for preparing a carbon fiber thermoplastic impregnation belt by water-based powder impregnation, the obtained impregnation belt has uniform powder adhesion carbon fibers and excellent infiltration effect and surface quality, and the problems of constant suspension concentration, drying of a fiber bundle after slurry impregnation and dripping of the suspension on the fiber bundle are solved.
The device for preparing the carbon fiber thermoplastic impregnated tape by impregnating the water-based powder comprises a pay-off device and a carbon fiber surface treatment device which are sequentially connected, wherein the water-based powder suspension impregnating device, a contact type drying device, a melting impregnation forming device, a calendering device and a traction device are sequentially connected behind the carbon fiber surface treatment device; wherein: the water-based powder suspension liquid impregnating device comprises a slurry impregnating device and a liquid storage device;
the slurry dipping device comprises a slurry dipping tank with a circular arc transition bottom angle, and one side of the slurry dipping tank is provided with a liquid inlet pipe; a liquid discharge pipe is arranged at the bottom of the slurry soaking groove; the slurry soaking tank is also provided with an inlet and an outlet, the outlet is provided with a scraper which is divided into an upper scraper and a lower scraper;
the liquid storage device comprises a liquid storage tank, a submersible pump is arranged at the bottom of the liquid storage tank and is connected with a liquid inlet pipe of the slurry soaking device, the water-based powder suspension in the liquid storage tank rapidly flows into the slurry soaking tank by virtue of the submersible pump, and eddy current circulation is formed upwards through an arc surface, so that the uniformity of the water-based powder suspension in the slurry soaking tank is improved; the liquid storage device also comprises a second vertical mechanical stirrer, and a stirring paddle of the second vertical mechanical stirrer is arranged at the bottom of the liquid storage tank;
the water-based powder suspension impregnation device also comprises a liquid supplementing device, wherein the liquid supplementing device comprises a liquid supplementing tank, the liquid supplementing tank is positioned at the upper part of the slurry soaking tank and is connected with the slurry soaking tank through a liquid supplementing pipe, and the liquid supplementing pipe is provided with a flow control valve for controlling the flow of the liquid supplementing to ensure the constancy of the water-based powder suspension; the liquid supplementing tank further comprises a first vertical mechanical stirrer, and a stirring paddle of the first vertical mechanical stirrer is arranged at the bottom of the liquid supplementing tank, so that the stability of the water-based powder suspension is ensured.
Wherein:
the liquid discharge pipe is connected with the top of the liquid storage tank.
The arc radius of the bottom corner is 10-50 mm.
The liquid inlet pipe is provided with a liquid inlet valve, and the liquid outlet pipe is provided with a liquid outlet valve. The liquid inlet valve and the liquid outlet valve respectively control the water-based powder suspension to enter and flow out of the slurry soaking device, so that the circulation of the water-based powder suspension is realized.
The water-based powder suspension is arranged in the liquid storage device and the liquid supplementing device and consists of water, alcohols, a dispersing agent, a thickening agent and powder resin, and the particle size of the powder resin is 1-30 mu m.
The upper scraper device comprises an upper scraper bolt and an upper scraper nut which are sequentially arranged from top to bottom and used for adjusting the height of the upper scraper device; the lower scraper comprises a lower scraper, and a lower scraper fixing device is arranged on the lower scraper. The width of the upper scraper and the lower scraper is adapted to the width of the spread continuous carbon fibers.
Heating rollers are arranged in the contact type drying device and are divided into an upper row and a lower row, and an upper row of heating rollers and a lower row of heating rollers are arranged at intervals and arranged in a wave fluctuation mode.
The melting dipping forming device is internally provided with a shaping roller which is divided into an upper row and a lower row, and an upper row of heating rollers and a lower row of heating rollers are arranged at intervals and arranged in a wave fluctuation mode.
The calendering device is provided with calendering rollers; the traction device is provided with a tension roller and a winding roller.
The method for preparing the carbon fiber thermoplastic impregnated tape by adopting the device comprises the following steps:
(1) leading the carbon fiber yarn out of the pay-off device, and leading the carbon fiber yarn to enter a carbon fiber surface treatment device along the horizontal direction through a guide wheel;
(2) after the carbon fiber yarn exits the carbon fiber surface treatment device, the carbon fiber yarn enters a water-based powder suspension liquid impregnation device through a guide wheel;
(3) opening a liquid inlet valve, starting a submersible pump, conveying a water-based powder suspension into a slurry dipping tank, performing powder dipping on carbon fiber yarns, changing the carbon fiber yarns into a horizontal direction through an outlet guide roller after the powder dipping, scraping redundant liquid through an upper scraper and a lower scraper, and then entering a contact type drying device;
(4) the carbon fiber yarn is heated by contacting with the surface of a heating roller, dried and then led out to enter a melting dipping forming device;
(5) after the carbon fiber yarns are contacted with the surface of the shaping roller, heating and melting resin, finally shaping, and entering a calendering device;
(6) rolling and rolling carbon fiber yarn to obtain a pre-impregnated tape, and feeding the pre-impregnated tape into a traction device;
(7) and tensioning the pre-impregnated belt by a tensioning roller, and finally winding by a winding roller to obtain the carbon fiber thermoplastic impregnated belt.
The invention has the following beneficial effects:
(1) the base angle that soaks the dressing trough is the circular arc transition, and its circular arc radius is 10 ~ 50mm, and stock solution tank bottom sets up the immersible pump, and the immersible pump is connected with the feed liquor pipe that soaks the dressing trough, and the water base powder suspension in the stock solution tank is with the help of the immersible pump, gushes into the soaking trough fast, upwards forms the vortex circulation through the arc surface, improves the homogeneity of soaking the inside water base powder suspension of dressing trough, has also prevented subsiding of water base powder suspension.
(2) The liquid replenishing device is arranged on the soaking device, so that the water-based powder suspension is continuously replenished into the soaking device while the carbon fiber yarns are soaked with the water-based powder suspension, and the concentration of the water-based powder suspension can be effectively ensured to be constant.
(3) The upper scraper and the lower scraper are arranged at the outlet of the slurry dipping tank, so that redundant attached suspension can be scraped, the problem of slurry dripping is solved, and the drying time is shortened.
(4) In the contact type drying device, the carbon fiber yarns soaked in the slurry are in direct contact with the heating rollers, heat is directly transferred to the carbon fiber yarns soaked in the slurry, so that the carbon fiber yarns dry water and melt resin, namely, the upper surface and the lower surface of the carbon fiber yarns are pressed against the surfaces of the heating rollers for multiple times, the impregnation between the resin and the carbon fiber yarns is effectively promoted, the two surfaces of the prepreg tape are polished, and the surface roughness of the prepreg tape is improved. The defects that in the prior art, the heating efficiency is low through heating channels or infrared, and the inside and outside of the resin attached to the fiber bundles are heated unevenly are overcome.
(5) The heating rollers which are staggered up and down, adjustable in height and arranged in a wavy and undulating mode are used for drying the wet powder impregnated carbon fiber yarns in a contact mode, and compared with a drying box type drying machine, the drying efficiency is high, the speed is high, and the space and the electric energy are saved.
(6) The carbon fiber yarn is melted, shaped and polished by a plurality of shaping rollers which are staggered up and down, have adjustable height and are arranged in a wavy way, and a calender is attached, so that the carbon fiber yarn is more effectively shaped compared with a heating channel and a pair roller rolling in the prior art.
Compared with dry powder impregnation, the method reduces the risk of explosion of dust in fire and avoids the pollution of dust in the processing process. Compared with the melting method, the processing temperature is reduced, and the resin aging caused by long-time retention of the melt in the impregnation cavity is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the squeegee configuration;
in the figure: 10. a pay-off device; 20. a carbon fiber surface treatment device; 30. a water-based powder suspension impregnation device; 311. a first vertical mechanical agitator; 312. a liquid replenishing tank; 313. a liquid supplementing pipe; 314. a flow control valve; 321. a slurry dipping tank; 322. an upper scraper device; 3221. an upper flight bolt; 3222. an upper flight nut; 323. a lower squeegee; 3231. a lower squeegee fixing device; 3232. a lower scraper; 324. a bottom corner; 325. a liquid inlet pipe; 326. a liquid inlet valve; 327. a drain valve; 328. a liquid discharge pipe; 331. a second vertical mechanical agitator; 332. a liquid storage tank; 333. a submersible pump; 40. a contact drying device; 41. a heating roller; 50. a melt dip forming device; 51. a shaping roller; 60. a calendering device; 61. a calender roll; 70. a traction device; 71. a tension roller; 72. and (4) a winding roller.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
As shown in fig. 1-2:
the device for preparing the carbon fiber thermoplastic impregnated tape by impregnating the water-based powder comprises a pay-off device 10 and a carbon fiber surface treatment device 20 which are sequentially connected, wherein a water-based powder suspension impregnating device 30, a contact type drying device 40, a melting impregnation forming device 50, a calendaring device 60 and a traction device 70 are sequentially connected behind the carbon fiber surface treatment device 20; wherein: the water-based powder suspension liquid impregnating device 30 comprises a slurry impregnating device and a liquid storage device;
the slurry dipping device comprises a slurry dipping tank 321 with a circular arc transition bottom corner 324, one side of the slurry dipping tank 321 is provided with a liquid inlet pipe 325, and the liquid inlet pipe 325 is provided with a liquid inlet valve 326; a drain pipe 328 is arranged at the bottom of the slurry soaking tank 321, and a drain valve 327 is arranged on the drain pipe 328; the liquid discharge pipe 328 is connected with the top of the liquid storage tank 332, the slurry soaking tank 321 is also provided with an inlet and an outlet, the outlet is provided with a scraper which is divided into an upper scraper 322 and a lower scraper 323;
the liquid storage device comprises a liquid storage tank 332, a submersible pump 333 is arranged at the bottom of the liquid storage tank 332, and the submersible pump 333 is connected with a liquid inlet pipe 325 of the slurry soaking device; the liquid storage device further comprises a second vertical mechanical stirrer 331, and a stirring paddle of the second vertical mechanical stirrer 331 is arranged at the bottom of the liquid storage tank 332;
the water-based powder suspension impregnation device 30 further comprises a liquid supplementing device, the liquid supplementing device comprises a liquid supplementing tank 312, the liquid supplementing tank 312 is positioned at the upper part of the slurry soaking tank 321 and is connected with the slurry soaking tank 321 through a liquid supplementing pipe 313, and the liquid supplementing pipe 313 is provided with a flow control valve 314; the make-up liquid tank 312 further comprises a first vertical mechanical stirrer 311, and a stirring blade of the first vertical mechanical stirrer 311 is arranged at the bottom of the make-up liquid tank 312.
The circular arc radius of the bottom corner 324 of the slurry dipping tank 321 is 10-50 mm.
The upper scraper 322 comprises an upper scraper bolt 3221 and an upper scraper nut 3222 which are sequentially arranged from top to bottom for adjusting the height of the upper scraper.
The lower scraper 323 comprises a lower scraper 3232, and a lower scraper fixing device 3231 is arranged on the lower scraper 3232. The upper scraper 322 and the lower scraper 323 can scrape off the redundant attached suspension, solve the problem of slurry dripping and shorten the drying time.
The water-based powder suspension is arranged in the liquid storage device and the liquid supplementing device and consists of water, alcohols (methanol, ethanol and glycerol), dispersing agents (sodium dodecyl sulfate and alkylphenol ethoxylates), thickening agents (polyvinyl alcohol) and PAEKs powder resin, and the particle size of the PAEKs powder resin is 1-30 mu m. The water-based powder suspension is a product which is easily prepared by a person skilled in the art, and all the components of the water-based powder suspension are commercially available products and the proportion of the components is the conventional proportion.
The contact drying device 40 is internally provided with heating rollers 41, the heating rollers 41 are divided into an upper row and a lower row, and the upper row of heating rollers and the lower row of heating rollers are arranged at intervals and arranged in a wave-shaped manner. Through letting the carbon fiber yarn that soaks the thick liquid with warming mill 41 direct contact, with the carbon fiber yarn that soaks the thick liquid of heat direct transfer, make it dry, resin melting with moisture, be about to the carbon fiber yarn two sides through a lot of with a plurality of warming mill surface laminating, promoted the flooding between resin and the carbon fiber yarn effectively to give two sides glazing of prepreg tape, improve the roughness on prepreg tape surface. The defects that in the prior art, the heating efficiency is low through heating channels or infrared, and the inside and outside of the resin attached to the fiber bundles are heated unevenly are overcome. The heating rollers 41 which are staggered up and down, adjustable in height and arranged in a wavy manner are adopted to dry the wet powder impregnated carbon fiber yarns in a contact manner, and compared with a drying box type drying machine, the drying efficiency is high, the speed is high, and the space and the electric energy are saved.
The melting dipping forming device 50 is internally provided with a shaping roller 51, the shaping roller 51 is divided into an upper row and a lower row, and an upper row of heating rollers and a lower row of heating rollers are arranged at intervals and arranged in a wave-shaped way. The rolling device 60 is provided with a rolling roller 61; the drawing device 70 is provided with a tension roller 71 and a take-up roller 72. The carbon fiber yarn is melted, shaped and polished by adopting a plurality of shaping rollers 21 which are staggered up and down, have adjustable height and are arranged in a wave fluctuation mode, and a calendering device 60 is attached, so that the carbon fiber yarn is more effectively shaped compared with the heating channel and the roller pair rolling in the prior art.
The method for preparing the carbon fiber thermoplastic impregnated tape by adopting the device comprises the following steps:
(1) leading the carbon fiber yarn out of the pay-off device 10 and entering the carbon fiber surface treatment device 20 along the horizontal direction through a guide wheel;
(2) after the carbon fiber yarn exits the carbon fiber surface treatment device 20, the carbon fiber yarn enters the water-based powder suspension liquid impregnation device 30 through the guide wheel;
(3) opening the liquid inlet valve 326, starting the submersible pump 333, conveying the water-based powder suspension into the slurry dipping tank 321, performing powder dipping on the carbon fiber yarn, opening the liquid discharge pipe 328 when the liquid level in the slurry dipping tank 321 is over the roller, and discharging the redundant water-based powder suspension into the liquid storage tank 332; with the continuous impregnation of the carbon fiber yarns, the water-based powder suspension in the liquid storage tank 332 is reduced, at the moment, the flow control valve 314 of the liquid supplementing device is opened, the water-based powder suspension is continuously supplemented into the pulp soaking device, and the concentration of the water-based powder suspension can be effectively ensured to be constant;
after powder impregnation, the carbon fiber yarn is changed into a horizontal direction through an outlet guide roller, and enters the contact type drying device 40 after being scraped by an upper scraper 322 and a lower scraper 323 to remove redundant suspension;
(4) the carbon fiber yarn is heated by contacting with the surface of the heating roller 41, dried and then led out to enter a melting and dipping forming device 50;
(5) after the carbon fiber yarn is contacted with the surface of the shaping roller 51, the carbon fiber yarn adhered with the powder resin is contacted with the surface of each impregnation element, the resin is heated and melted by the pressure of the carbon fiber yarn and the surface of the element, and finally the carbon fiber yarn is shaped and enters a calendaring device 60;
(6) glazing, cooling and calendering the carbon fiber yarn by a calendering roller 61 to obtain a prepreg tape, and feeding the prepreg tape into a traction device 70;
(7) the prepreg tape is stretched by a tension roll 71 and finally wound by a take-up roll 72 to obtain a carbon fiber thermoplastic impregnated tape having a good impregnation and a smooth surface.
Claims (10)
1. The utility model provides a device of water base powder flooding preparation carbon fiber thermoplasticity flooding area, includes pay-off (10), carbon fiber surface treatment device (20) that connect gradually, its characterized in that: the carbon fiber surface treatment device (20) is sequentially connected with a water-based powder suspension impregnation device (30), a contact type drying device (40), a melt impregnation forming device (50), a calendering device (60) and a traction device (70); wherein: the water-based powder suspension liquid impregnating device (30) comprises a slurry impregnating device and a liquid storage device;
the slurry soaking device comprises a slurry soaking groove (321) with a circular arc transition bottom corner (324), and one side of the slurry soaking groove (321) is provided with a liquid inlet pipe (325); a liquid discharge pipe (328) is arranged at the bottom of the slurry soaking tank (321); the slurry soaking tank (321) is also provided with an inlet and an outlet, the outlet is provided with a scraper, and the scraper is divided into an upper scraper (322) and a lower scraper (323);
the liquid storage device comprises a liquid storage tank (332), a submersible pump (333) is arranged at the bottom of the liquid storage tank (332), and the submersible pump (333) is connected with a liquid inlet pipe (325) of the slurry soaking device;
the water-based powder suspension impregnation device (30) further comprises a liquid supplementing device, the liquid supplementing device comprises a liquid supplementing tank (312), and the liquid supplementing tank (312) is located at the upper part of the slurry soaking tank (321) and is connected with the slurry soaking tank (321) through a liquid supplementing pipe (313).
2. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the liquid discharge pipe (328) is connected with the top of the liquid storage tank (332); the liquid storage device also comprises a second vertical mechanical stirrer (331), and a stirring paddle of the second vertical mechanical stirrer (331) is arranged at the bottom of the liquid storage tank (332); the liquid replenishing tank (312) also comprises a first vertical mechanical stirrer (311), and a stirring paddle of the first vertical mechanical stirrer (311) is arranged at the bottom of the liquid replenishing tank (312).
3. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the arc radius of the bottom corner (324) is 10-50 mm.
4. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the liquid inlet pipe (325) is provided with a liquid inlet valve (326), the liquid outlet pipe (328) is provided with a liquid outlet valve (327), and the liquid supplementing pipe (313) is provided with a flow control valve (314).
5. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the upper scraper device (322) comprises an upper scraper bolt (3221) and an upper scraper nut (3222) which are sequentially arranged from top to bottom and used for adjusting the height of the upper scraper device.
6. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the lower scraper (323) comprises a lower scraper (3232), and a lower scraper fixing device (3231) is arranged on the lower scraper (3232).
7. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the contact type drying device (40) is internally provided with heating rollers (41), the heating rollers (41) are divided into an upper row and a lower row, and an upper row of heating rollers and a lower row of heating rollers are arranged at intervals and arranged in a wave-shaped manner.
8. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: a shaping roller (51) is arranged in the melting and dipping forming device (50), the shaping roller (51) is divided into an upper row and a lower row, and an upper row of heating rollers and a lower row of heating rollers are arranged at intervals and are arranged in a wave fluctuation mode.
9. The apparatus for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation according to claim 1 wherein: the rolling device (60) is provided with a rolling roller (61); the traction device (70) is provided with a tension roller (71) and a winding roller (72).
10. A method for producing a carbon fibre thermoplastic impregnated tape using the apparatus of any of claims 1 to 9, characterised by the steps of:
(1) leading the carbon fiber yarn out of the pay-off device (10) and entering the carbon fiber surface treatment device (20) along the horizontal direction through a guide wheel;
(2) after the carbon fiber yarn exits the carbon fiber surface treatment device (20), the carbon fiber yarn enters a water-based powder suspension liquid impregnation device (30) through a guide wheel;
(3) opening a liquid inlet valve (326), starting a submersible pump (333), conveying the water-based powder suspension into a slurry dipping tank (321), performing powder dipping on the carbon fiber yarn, changing the powder dipping direction into a horizontal direction through an outlet guide roller, scraping redundant liquid through an upper scraper blade (322) and a lower scraper blade (323), and then entering a contact type drying device (40);
(4) the carbon fiber yarn is heated by contacting with the surface of a heating roller (41), dried and then led out to enter a melting and dipping forming device (50);
(5) after the carbon fiber yarn is contacted with the surface of a shaping roller (51), resin is heated and melted, and finally shaped, and enters a calendaring device (60);
(6) carbon fiber yarn is rolled by a calender roll (61) to obtain a pre-impregnated tape, and the pre-impregnated tape enters a traction device (70);
(7) the prepreg tape is tensioned by a tensioning roller (71) and finally wound by a winding roller (72) to obtain the carbon fiber thermoplastic prepreg tape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975988.6A CN110712383A (en) | 2019-10-15 | 2019-10-15 | Device and method for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910975988.6A CN110712383A (en) | 2019-10-15 | 2019-10-15 | Device and method for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation |
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| CN110712383A true CN110712383A (en) | 2020-01-21 |
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| CN201910975988.6A Withdrawn CN110712383A (en) | 2019-10-15 | 2019-10-15 | Device and method for preparing carbon fiber thermoplastic impregnated tape by water-based powder impregnation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111057346A (en) * | 2020-01-09 | 2020-04-24 | 江苏韩塑新材料有限公司 | Carbon fiber reinforced PEEK unidirectional tape and preparation method thereof |
| CN112659592A (en) * | 2020-12-16 | 2021-04-16 | 盐城工学院 | Carbon fiber reinforced polyamide unidirectional tape composite material and preparation method thereof |
| CN112810188A (en) * | 2021-02-26 | 2021-05-18 | 山东中航和辉航空标准件有限责任公司 | Continuous manufacturing method of composite material section bar |
| CN114261037A (en) * | 2021-12-23 | 2022-04-01 | 郑州大学 | Multi-tow carbon fiber width-spreading pre-dipping system |
| CN115366443A (en) * | 2022-09-08 | 2022-11-22 | 四川大学 | Continuous fiber reinforced thermoplastic composite material impregnation method, printing method and device |
| EP4361556A1 (en) * | 2022-10-28 | 2024-05-01 | Ideko, S.Coop. | Device and method for measuring the fibre content of a sheet of prepreg material |
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2019
- 2019-10-15 CN CN201910975988.6A patent/CN110712383A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111057346A (en) * | 2020-01-09 | 2020-04-24 | 江苏韩塑新材料有限公司 | Carbon fiber reinforced PEEK unidirectional tape and preparation method thereof |
| CN111057346B (en) * | 2020-01-09 | 2022-10-14 | 江苏韩塑新材料有限公司 | Carbon fiber reinforced PEEK unidirectional tape and preparation method thereof |
| CN112659592A (en) * | 2020-12-16 | 2021-04-16 | 盐城工学院 | Carbon fiber reinforced polyamide unidirectional tape composite material and preparation method thereof |
| CN112810188A (en) * | 2021-02-26 | 2021-05-18 | 山东中航和辉航空标准件有限责任公司 | Continuous manufacturing method of composite material section bar |
| CN114261037A (en) * | 2021-12-23 | 2022-04-01 | 郑州大学 | Multi-tow carbon fiber width-spreading pre-dipping system |
| CN114261037B (en) * | 2021-12-23 | 2022-12-02 | 郑州大学 | Multi-tow carbon fiber width-spread pre-impregnation system |
| CN115366443A (en) * | 2022-09-08 | 2022-11-22 | 四川大学 | Continuous fiber reinforced thermoplastic composite material impregnation method, printing method and device |
| EP4361556A1 (en) * | 2022-10-28 | 2024-05-01 | Ideko, S.Coop. | Device and method for measuring the fibre content of a sheet of prepreg material |
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Application publication date: 20200121 |