CN203729003U - Low-cost high-performance large tow carbon fiber spreading device - Google Patents
Low-cost high-performance large tow carbon fiber spreading device Download PDFInfo
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- CN203729003U CN203729003U CN201420038401.1U CN201420038401U CN203729003U CN 203729003 U CN203729003 U CN 203729003U CN 201420038401 U CN201420038401 U CN 201420038401U CN 203729003 U CN203729003 U CN 203729003U
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Abstract
The utility model provides a low-cost high-performance large tow carbon fiber spreading device which comprises a yarn placing device. The yarn placing device is used for placing of fiber bundles and achieving tension control. The low-cost high-performance large tow carbon fiber spreading device is characterized in that the fiber bundles are guided out from the yarn placing device and then enter a pre-yarn-spreading device, the pre-yarn-spreading device spreads the fiber bundles with an ultrasonic wave fiber expanding method, the pre-spread fiber bundles pass between a rubber roller and a metal roller, liquid on the surfaces of the fiber bundles is removed under the common squeezing effect of the rubber roller and the metal roller, then the pre-spread fiber bundles enter a detecting mechanism, the speed of the fiber bundles is adjusted through the detecting mechanism, constant tension of the fiber bundles is guaranteed, the pre-spread fiber bundles with the speed and the tension well adjusted enter a main yarn spreading device which spreads the fiber bundles with a sound wave fiber expanding method, and the spread fiber bundles are subjected to taking up through a dragging curling device. The device can effectively spread large tow carbon fibers effectively.
Description
Technical field
The utility model relates to a kind of low-cost and high-performance large-tow carbon fiber expanding unit.
Background technology
Due to large-tow carbon fiber, as 48K, 60K to such an extent as to the price of 360K, 480K etc. than the considerably cheaper of little tow, large tow price only has the 50%-60% of little tow, and the cost of advanced composite material can significantly be reduced.Large-tow carbon fiber is the same with little tow carbon fiber, can make composite, but material and processing cost differs greatly.Because from petroleum to carbon fiber, increment relation is 1 to 3, and carbon fiber is made to composite, and increment is to 10.That is to say that the cost of carbon fiber in composite only accounts for 25%-30%, follow-up fibre forming parts processing cost accounts for 70%-75%.Select low-cost large-tow carbon fiber can make following process save most cost, can realize high-performance carbon fibre composite cost degradation, meet the demand that the aspects such as space flight and aviation, wind electricity blade and automobile making grow with each passing day.
But large-tow carbon fiber exists along with fibre bundle radical increases and the complications of fiber occur, the phenomenon of kink, and resin matrix is not easy to infiltrate to large bunch fiber bundle inner, between monofilament, easily produce hole, and the enrichment that easily causes fiber phase and resin-phase and the defect such as separated, can increase with tow diameter simultaneously, the possibility that occurs fiber flexing and laying angular misalignment in composite material shaping process is also increasing, thereby make composite material strength, rigidity is influenced, mechanical property reduces, dispersed large, can not meet the requirement of structural design, cannot bring into play carbon fibre reinforcement high-performance advantage, having caused like this large-tow carbon fiber to widely apply still has any problem.
Break through low-cost large-tow carbon fiber performance high-performance advantage key technology and develop exactly large-tow carbon fiber expansion technique, this can be avoided the generation of this type of defect to a great extent.If it is enough wide that large-tow carbon fiber launches, such as traditional 50K carbon fiber is 6mm, more than utilizing carbon fiber expansion technique to 4 times, can be more frivolous than the little tow 12K of tradition carbon fiber, make the more low-cost and high-performance large-tow carbon fiber composite of lightweight.
At present, around large-tow carbon fiber expanding unit, mainly adopt mechanical multiple-roll mode, by roller roll extrusion, swing or vertical tremor mode is drawn thin by fibre bundle broadening, launch effect by controlling vibration amplitude, if strengthen vibration amplitude, easily cause carbon fiber to fracture, and vibration frequency is restricted, it is not very desirable launching effect, very large to fibre damage.Attempted other exhibition yarn modes abroad, comprised that ultrasonic wave expands that fine method, jet-impingement expand fine method, sound wave expands fine method etc.These methods can make large bunch fiber damage little, do not rise or few fluffing, but the width launching are limited.
Utility model content
The purpose of this utility model be to provide a kind of can be effectively by the equipment of large-tow carbon fiber Shu Zhankai.
In order to achieve the above object, the technical solution of the utility model has been to provide a kind of low-cost and high-performance large-tow carbon fiber expanding unit, comprise for placing fibre bundle and realizing the yarn feeding device of putting that tension force controls, it is characterized in that: fibre bundle enters preview yarn feeding device from putting after yarn feeding device is drawn, by preview yarn feeding device, utilize ultrasonic wave to expand fine method by fibre bundle pre-deployment, the fibre bundle of pre-deployment is by passing through between rubber roller and metallic roller, under its common squeezing action, remove the liquid on fibre bundle surface, enter subsequently testing agency, by testing agency, adjust the speed of fibre bundle and guarantee fibre bundle constant tension, tension force, the pre-deployment fibre bundle that speed is adjusted enters main exhibition yarn feeding device, by main exhibition yarn feeding device, utilizing sound wave to expand fine method launches fibre bundle, fibre bundle after expansion is by the rolling of tractive crimping device.
Preferably, the described yarn feeding device of putting comprises for placing the creel of fibre bundle, fibre bundle goes out creel by being directed to described preview yarn feeding device by the first guide roller, above the fibre bundle between creel and the first guide roller, be provided with the first dancer and the second dancer, the first dancer and the second dancer configure respectively a synchronous electric drive motor, the first dancer is connected by Timing Belt with the second dancer, and the direction of motion of Timing Belt is contrary with the direction of motion with fibre bundle and on fibre bundle, produce axial force.
Preferably, described preview yarn feeding device comprises that supersonic generator, liquid bath, the first exhibition leno draw, the second exhibition leno draws, the 3rd exhibition leno draws, in liquid bath, fill organic solvent, the first exhibition leno draws, the second exhibition leno draws and the 3rd exhibition leno draws in the organic solvent being arranged in liquid bath, in liquid bath, be provided with supersonic generator and ultrasonic resonance plate, after fibre bundle enters liquid bath, pile warp the first exhibition leno draws successively, the second exhibition leno draws and the 3rd exhibition leno draws rear liquid outlet groove.
Preferably, described supersonic generator produces ultrasonic power strength control at 0.6~1.1w/cm
2, frequency of utilization is controlled at 20~50KHz, fibre bundle in organic solvent because hyperacoustic propagation is expanded in advance.
Preferably, described testing agency comprises the tension stability rod between the second guide roller and support stick, by adjusting the position of tension stability rod, adjust fibre bundle speed, above tension stability rod and below be separately installed with for detection of the upper limit position sensor of upper limit position and for detection of the lower position sensor of its lower position.
Preferably, described testing agency guarantees that the step of fibre bundle constant tension is:
When the tension force of the fibre bundle in advancing increases, described tension stability rod moves up, and tension force is when reduce, and moves down; When tension stability roller arrives its upper limit position, described upper limit position sensor such position detected and this consequential signal is fed back to described in put yarn feeding device, put yarn feeding device increase and put yarn rotary speed, to increase fibre bundle, supply with and tension stability rod is declined; When tension stability rod arrives its lower position, described lower position sensor inspection side feeds back to and puts yarn feeding device to such position and by this consequential signal, put yarn feeding device and reduce the supply of fibre bundle and make tension stability roller increase, fibre bundle tension force always keeps constant like this.
Preferably, described main exhibition yarn feeding device comprises low-frequency generator, power amplifier, loudspeaker, the first deflector roll and the second deflector roll, low-frequency generator connects low-frequency generator, low-frequency generator is connected with loudspeaker, the first deflector roll and the second deflector roll are arranged in loudspeaker, and fibre bundle enters after loudspeaker successively and goes out loudspeaker after pile warp the first deflector roll and the second deflector roll.
Preferably, the step that described main exhibition yarn feeding device launches fibre bundle is:
Utilize the electromagnetic induction principle of described low-frequency generator, a part of conductor of energising is done to the sensor current signal that cutting magnetic induction line motion changes in magnetic field, described power amplifier amplifies sensor current signal, then the magnetic field that the sensor current signal changing changes by coil, thereby allow the diaphragm of described loudspeaker vibrate, cause the concussion of ambient air, by air concussion, make and then constantly vibration of fibre bundle, thereby be unfolded.
Preferably, described low-frequency generator is to work under alternating voltage, adopts the form of frequency conversion or transformation; The low-frequency generator optional frequency of frequency conversion form is selected scope 20-50Hz; The low-frequency generator voltage selectable range of transformation form is 4-12V; Described loudspeaker is contained in the glued board of sealing, produces sound wave scope at 80-130dB; The surface of described the first deflector roll and the second exhibition yarn roller is through too high polishing.
The equipment that the utility model provides can effectively fully launch large-tow carbon fiber.In large-tow carbon fiber expansion process, utilize ultrasonic wave to expand fine method and sound wave expands the mode that fine method combines, can make fibre bundle fully launch; For making fibre bundle avoid scattering because shake is shaken fibre bundle in expansion process, in expansion process, added a pair of roller, can pave along vibration rod surface uniform like this, effect is paved in the expansion of Stable Carbon fiber.Meanwhile, on-line measuring device can be controlled fibre bundle feeding speed, keeps constant tension.This technique can make tow extension width wide, 4 times of the large original fibre bundle of tow spreading width, and fibre damage is few, do not play or few fluffing good stability, the fibre bundle extends parallel after broadening, between fiber, intersect little, the advantage such as the composite void content that makes is low.
Accompanying drawing explanation
The structural representation of a kind of low-cost and high-performance large-tow carbon fiber expanding unit that Fig. 1 provides for the utility model.
The specific embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
In conjunction with Fig. 1, a kind of low-cost and high-performance large-tow carbon fiber expanding unit that the utility model provides adopts ultrasonic wave to expand fine method and sound wave to expand the mode that fine method combines and launch large-tow carbon fiber.This device comprises creel 1, yarn cylinder is placed on creel 1, by yarn cylinder, draws fibre bundle, enter afterwards preview yarn feeding device 20, it is ultrasonic wave fiber-expanding machine, make fibre bundle obtain expansion in advance, then by checkout gear 50, adjust fibre bundle speed, feed subsequently main exhibition yarn feeding device 30, be sound wave fiber-expanding machine, large-tow carbon fiber fully launched, finally by tractive crimping device 40 by the large bunch fiber rolling launching.
The effect of putting yarn feeding device 10 is to put yarn from creel 1, can realize tension force simultaneously and control.It is comprised of creel 1, the first dancer 2.1, the second dancer 2.2 and belt 3.Creel 1 adopts horizontal mounting means.On fibre bundle, tension force is mainly controlled by the first dancer 2.1, the second dancer 2.2 and belt 3.The first dancer 2.1 and the second dancer 2.2 configure respectively a synchronous electric drive motor, coordinate its self-movement.By changing motor output voltage, change the vertical position that can change dancer, belt 3 moves along the direction contrary with fibre bundle, produces axial force on fibre bundle, realizes fibre bundle tension force and controls.
By the first guide roller 4.1, fibre bundle is fed to preview yarn feeding device 30 afterwards.Preview yarn feeding device 20 utilizes ultrasonic wave to expand fine method by fiber pre-deployment.This device mainly comprises supersonic generator 5,, liquid bath 6, the first exhibition leno draw the 7.1, second exhibition leno to draw the 7.2 and the 3rd exhibition leno to draw 7.3.Fibre bundle is fed in liquid bath 6, in the organic liquor that ultrasonic wave fills in liquid bath 6, propagate, fibre bundle is expanded in advance.The first exhibition leno draws the 7.2 and the 3rd exhibition leno 7.3 effects of drawing of drawing of the 7.1, second exhibition leno in organic liquor, to fibre bundle, to apply tension force exactly, prevents that fiber from scattering.In liquid bath 6, fill the organic solvent that just can dissolve at normal temperatures fibre bundle surface slurry, avoid fiber can produce the in the situation that of heating crosslinked, if this situation occurs in fibre bundle, fibre bundle surface slurry has become binding agent on the contrary like this, and fibre bundle will be sticked together.Hyperacoustic power level is generally at 0.6~1.1w/cm
2, frequency is that 20~50KHz is comparatively suitable.Fibre bundle surface slurry degree of cleaning is by regulating fibre bundle speed to regulate.
The fibre bundle of pre-deployment is passed through between rubber roller 8 and metallic roller 9, under their squeezing actions, remove fibre bundle surface liquid, avoid the fracture of the fibre bundle that the surface tension due to liquid produces.
Then the fibre bundle of pre-deployment enters testing agency 50.Testing agency 50, by regulating the position of the tension stability rod 13 between the second guide roller 4.2 and support stick 14.1, adjusts fibre bundle speed.In order to guarantee fibre bundle constant tension, above tension stability roller 13 and below install respectively for detection of the upper limit position sensor 11.1 of upper limit position and for detection of the lower position sensor 11.2 of its lower position.Implementation, when the tension force of the fibre bundle in advancing increases, tension stability rod 13 moves up, and when tension force reduces, moves down.Yet, when tension stability roller 13 arrives its upper limit position, upper limit position sensor 11.1 detects such position and this consequential signal is fed back to and puts yarn feeding device 10, increases and puts yarn rotary speed, to increase fibre bundle, supplies with and tension stability rod 13 is declined.On the contrary, when tension stability rod 13 arrives its lower position, lower position sensor 11.2 inspection sides to and this consequential signal is fed back to and puts yarn feeding device 10, to reduce the supply of fibre bundle, make 13 risings of tension stability roller, fibre bundle tension force always keeps constant like this.
The pre-deployment fibre bundle that tension force, speed are adjusted passes through between mip rolls 15 and backing roll 14.2.Mip rolls 15 direction of rotation are consistent with fibre bundle feeding direction, are one direction rotations, to prevent that fibre bundle is pulled.
Pre-deployment fibre bundle then enters main exhibition yarn feeding device 30.Main exhibition yarn feeding device 30 is sound wave fiber-expanding machine, utilizes the sound wave of low frequency in gas medium, to vibrate tow, and tow is launched.This device mainly comprises low-frequency generator 16, power amplifier 17, loudspeaker 18, the first deflector roll 19.1 and the second deflector roll 19.2.First utilize the electromagnetic induction principle of low-frequency generator 16, a part of conductor of energising is done to the induced-current that cutting magnetic induction line motion changes in magnetic field, power amplifier 17 amplifies the signal of telecommunication, then the electric current changing passes through coil, the magnetic field changing, thus allow the diaphragm of loudspeaker 16 vibrate, cause the concussion of ambient air, by air concussion, make and then constantly vibration of fibre bundle, fibre bundle is launched.Briefly, low-frequency generator 16 is converted into electric energy by mechanical energy, and power amplifier 17 amplifies this signal of telecommunication, and loudspeaker 18 is exactly that the signal of telecommunication is converted into sound wave release, and sound wave causes oxygen diffusion and vibration, by air vibration fibre bundle, fibre bundle is launched.The first deflector roll 19.1, the second deflector roll 19.2 effects are on fibre bundle, to have suitable tension force in order to make, and prevent that the vertical hunting of fiber from reducing the damage of fiber.The resistance of loudspeaker 18 is that 8 ohm, power are 100 watts.Low-frequency generator 16 is to work under alternating voltage, adopts the form of frequency conversion or transformation.Frequency conversion form low-frequency generator 16 optional frequencies are selected scope 20-50Hz.Transformation form low-frequency generator 16 voltage selectable ranges are 4-12V.Loudspeaker 18 is contained in the glued board of sealing, produces sound wave scope at 80-130dB.The surface of the first deflector roll 19.1 and the second deflector roll 19.2 is through too high polishing.
In tractive crimping device 40, pulling roll 21.1 and pulling roll 21.2 surfaces are comprised of silicon rubber rod.Under pulling roll effect, assurance fibre bundle stabilized speed is advanced, and fibre bundle surface tension is consistent like this, through the fibre bundle in tractive district, is finally received 22 rollings of yarn cylinder.
Claims (9)
1. a low-cost and high-performance large-tow carbon fiber expanding unit, comprise and put yarn feeding device (10) for what place fibre bundle and realize that tension force controls, it is characterized in that: fibre bundle enters preview yarn feeding device (20) from putting after yarn feeding device (10) is drawn, by preview yarn feeding device (20), utilize ultrasonic wave to expand fine method by fibre bundle pre-deployment, the fibre bundle of pre-deployment is by passing through between rubber roller (8) and metallic roller (9), under its common squeezing action, remove the liquid on fibre bundle surface, enter subsequently testing agency (50), by testing agency (50), adjust the speed of fibre bundle and guarantee fibre bundle constant tension, tension force, the pre-deployment fibre bundle that speed is adjusted enters main exhibition yarn feeding device (30), by main exhibition yarn feeding device (30), utilizing sound wave to expand fine method launches fibre bundle, fibre bundle after expansion is by tractive crimping device (40) rolling.
2. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 1, it is characterized in that: described in put yarn feeding device (10) and comprise the creel (1) for placing fibre bundle, fibre bundle goes out creel (1) by being directed to described preview yarn feeding device (20) by the first guide roller (4.1), in the top that is positioned at the fibre bundle between creel (1) and the first guide roller (4.1), be provided with the first dancer (2.1) and the second dancer (2.2), the first dancer (2.1) and the second dancer (2.2) configure respectively a synchronous electric drive motor, the first dancer (2.1) is connected by Timing Belt (3) with the second dancer (2.2), the direction of motion of Timing Belt (3) is contrary with the direction of motion with fibre bundle and on fibre bundle, produce axial force.
3. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 1, it is characterized in that: described preview yarn feeding device (20) comprises supersonic generator (5), liquid bath (6), the first exhibition leno draws (7.1), the second exhibition leno draws (7.2), the 3rd exhibition leno draws (7.3), liquid bath fills organic solvent in (6), the first exhibition leno draws (7.1), the second exhibition leno draws (7.2) and the 3rd exhibition leno to draw (7.3) to be arranged in the organic solvent in liquid bath (6), in liquid bath (6), be provided with supersonic generator (5) and ultrasonic resonance plate, fibre bundle enters after liquid bath (6) pile warp the first exhibition leno successively and draws (7.1), the second exhibition leno draws (7.2) and the 3rd exhibition leno to draw liquid outlet groove (6) after (7.3).
4. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 3, is characterized in that: described supersonic generator (5) produces ultrasonic power strength control at 0.6~1.1w/cm
2, frequency of utilization is controlled at 20~50KHz, fibre bundle in organic solvent because hyperacoustic propagation is expanded in advance.
5. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 1, it is characterized in that: described testing agency (50) comprises the tension stability rod (13) being positioned between the second guide roller (4.2) and support stick (14.1), by adjusting the position of tension stability rod (13), adjust fibre bundle speed, in the top of tension stability rod (13) and below be separately installed with for detection of the upper limit position sensor (11.1) of upper limit position and for detection of the lower position sensor (11.2) of its lower position.
6. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 5, is characterized in that: described testing agency (50) guarantees that the step of fibre bundle constant tension is:
When the tension force of the fibre bundle in advancing increases, described tension stability rod (13) moves up, and tension force is when reduce, and moves down; When tension stability roller (13) arrives its upper limit position, described upper limit position sensor (11.1) such position detected and this consequential signal is fed back to described in put yarn feeding device (10), put yarn feeding device (10) increase and put yarn rotary speed, to increase fibre bundle, supply with and make tension stability rod (13) to decline; When tension stability rod (13) arrives its lower position, described lower position sensor (11.2) inspection side feeds back to and puts yarn feeding device (10) to such position and by this consequential signal, put yarn feeding device (10) and reduce the supply of fibre bundle and make tension stability roller (13) increase, fibre bundle tension force always keeps constant like this.
7. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 1, it is characterized in that: described main exhibition yarn feeding device (30) comprises low-frequency generator (16), power amplifier (17), loudspeaker (18), the first deflector roll (19.1) and the second deflector roll (19.2), low-frequency generator (16) connects low-frequency generator (16), low-frequency generator (16) is connected with loudspeaker (18), the first deflector roll (19.1) and the second deflector roll (19.2) are arranged in loudspeaker (18), fibre bundle enters after loudspeaker (18) successively and goes out loudspeaker (18) after pile warp the first deflector roll (19.1) and the second deflector roll (19.2).
8. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 7, is characterized in that: the step that described main exhibition yarn feeding device (30) launches fibre bundle is:
Utilize the electromagnetic induction principle of described low-frequency generator (16), a part of conductor of energising is done to the sensor current signal that cutting magnetic induction line motion changes in magnetic field, described power amplifier (17) amplifies sensor current signal, then the magnetic field that the sensor current signal changing changes by coil, thereby allow the diaphragm of described loudspeaker (18) vibrate, cause the concussion of ambient air, by air concussion, make and then constantly vibration of fibre bundle, thereby be unfolded.
9. a kind of low-cost and high-performance large-tow carbon fiber expanding unit as claimed in claim 7, is characterized in that: described low-frequency generator (16) is to work under alternating voltage, adopts the form of frequency conversion or transformation; The low-frequency generator of frequency conversion form (16) optional frequency is selected scope 20-50Hz; The low-frequency generator of transformation form (16) voltage selectable range is 4-12V; Described loudspeaker (18) is contained in the glued board of sealing, produces sound wave scope at 80-130dB; The surface of described the first deflector roll (19.1) and the second exhibition yarn roller (19.2) is through too high polishing.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103757783A (en) * | 2014-01-22 | 2014-04-30 | 东华大学 | Low-cost high-performance large-tow carbon fiber spreading device |
CN104178847A (en) * | 2014-07-29 | 2014-12-03 | 于星杰 | Carbon fiber bundle expansion device |
CN105000428A (en) * | 2015-07-15 | 2015-10-28 | 北京昂林贸烽科技有限公司 | Equipment and technological method for expansion of fiber bundles |
CN106644923A (en) * | 2016-10-28 | 2017-05-10 | 江苏恒神股份有限公司 | Testing device and testing method for filament spreading performance of carbon fiber tow |
CN107904738A (en) * | 2017-11-10 | 2018-04-13 | 河南工业大学 | Large-tow carbon fiber spreads and curing integrated technology of preparing |
CN110248788A (en) * | 2017-02-13 | 2019-09-17 | 沙特基础工业全球技术有限公司 | The method for producing fiber band |
CN112481766A (en) * | 2020-12-02 | 2021-03-12 | 常州市新创智能科技有限公司 | High gram weight carbon fiber yarn exhibition fine device |
US11401630B2 (en) | 2017-03-30 | 2022-08-02 | M.A.E. S.P.A. | Method for spreading a tow of textile non-braided filaments, preferably chemical or inorganic filaments |
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2014
- 2014-01-22 CN CN201420038401.1U patent/CN203729003U/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103757783A (en) * | 2014-01-22 | 2014-04-30 | 东华大学 | Low-cost high-performance large-tow carbon fiber spreading device |
CN104178847A (en) * | 2014-07-29 | 2014-12-03 | 于星杰 | Carbon fiber bundle expansion device |
CN105000428A (en) * | 2015-07-15 | 2015-10-28 | 北京昂林贸烽科技有限公司 | Equipment and technological method for expansion of fiber bundles |
CN106644923A (en) * | 2016-10-28 | 2017-05-10 | 江苏恒神股份有限公司 | Testing device and testing method for filament spreading performance of carbon fiber tow |
CN110248788A (en) * | 2017-02-13 | 2019-09-17 | 沙特基础工业全球技术有限公司 | The method for producing fiber band |
US11401630B2 (en) | 2017-03-30 | 2022-08-02 | M.A.E. S.P.A. | Method for spreading a tow of textile non-braided filaments, preferably chemical or inorganic filaments |
CN107904738A (en) * | 2017-11-10 | 2018-04-13 | 河南工业大学 | Large-tow carbon fiber spreads and curing integrated technology of preparing |
CN107904738B (en) * | 2017-11-10 | 2020-02-14 | 河南工业大学 | Large-tow carbon fiber widening and curing integrated preparation technology |
CN112481766A (en) * | 2020-12-02 | 2021-03-12 | 常州市新创智能科技有限公司 | High gram weight carbon fiber yarn exhibition fine device |
CN112481766B (en) * | 2020-12-02 | 2021-08-10 | 常州市新创智能科技有限公司 | High gram weight carbon fiber yarn exhibition fine device |
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Granted publication date: 20140723 Termination date: 20170122 |