CN100575575C - In radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament - Google Patents
In radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament Download PDFInfo
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- CN100575575C CN100575575C CN200710062004A CN200710062004A CN100575575C CN 100575575 C CN100575575 C CN 100575575C CN 200710062004 A CN200710062004 A CN 200710062004A CN 200710062004 A CN200710062004 A CN 200710062004A CN 100575575 C CN100575575 C CN 100575575C
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Abstract
The present invention relates in radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament.Be applied in the processing technology to pre-oxidized fibers or carbon fiber.This method realizes by following steps: 1. improve employed RF linear focusing heating mechanism, between this device wire feeder and quartz ampoule thermal reactor the tow twisting apparatus is set.2. filament tow was twisted processing before entering the quartz ampoule thermal reactor.Said twisting apparatus is by framework, be set in negative on this framework, be fixed at least three tensioning directive wheels on the negative and form by the driving mechanism that hollow shaft drives end spot (9B) rotation by means of hollow shaft, filament tow from wire feeder draw, behind the twisting node that pair roller is formed, pass hollow shaft and walk around the tensioning directive wheel and enter the quartz ampoule thermal reactor.Further improving is the identical tow of structure to be set separate twist device between quartz ampoule thermal reactor and wire drawing mechanism.
Description
Technical field
The invention belongs to radio frequency method is realized the improvement of carbon fiber and graphite production technology and production equipment and perfect.In radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament specifically.
Background technology
In the production technology of carbon fiber and graphiteization, need be raw material when being heated to more than 2400 ℃ high temperature, make the carbon molecule become the ordered lattice structure by lasting drafting force, thereby finish by of the conversion of common carbon molecule to the graphitization molecule with carbon fiber.By the beginning that the radio frequency method carbon fiber and graphite production technology and the equipment of Chen Xinmou foundation have then been started this area, can referenced patent application document 200410012239.7.This technology is by RF high power generator and adaptation, by radio-frequency cable just energy of electromagnetic field directly deliver to the coaxial conjugation coupling cavity of line focus, form the electromagnetic field of linear focusing, be carried on the carbon fiber that passes the quartz ampoule thermal reactor, can directly be heated to the conversion of finishing carbonization structure more than 2400 ℃.This processing technique equipment is simple, regulate and control easy and accurate, greatly save the energy and reduced cost, it is the once breakthrough improvement in this area, solved the firing equipment and the good technique of most critical in the carbon fiber and graphite processing, and can be generalized in the technology to the heat treated of pre-oxidized fibers.But, in concrete continuous flow procedure, involved carbon fiber or pre-oxidized fibers be the thousands of unordered tow of combining at random of monofilament often, under the effect of electromagnetic field of high frequency, inevitably kindred effect occurs and be directed at repulsion between monofilament, it is further at random to form tow, and the middle silk hair that is being mingled with the monofilament that breaks end.Monofilament induced electromotive force difference be easy to cause the sparking of silk hair overlap joint because the difference of field strength distribution makes, cause broken end to increase.This just directly has influence on the intensity and and the quality of final products.In order to guarantee the quantity-produced stability under the hot environment, need do further production technology and relevant production equipment and improve.
Summary of the invention
The objective of the invention is to design a kind of method and device of striking sparks between monofilament of in radio frequency method heating fiber bundle silk technology, eliminating, eliminate the approach effect that the like charges repulsion causes under the electromagnetic induction, further improve the operating efficiency of radio frequency method firing equipment.
Basic solution thinking of the present invention is exactly that the tow that monofilament is formed is beaten sth. made by twisting, make it to become the rope of mutual restriction between monofilament, thereby can weaken the potential difference between the monofilament that approach effect causes greatly, the result who beats sth. made by twisting has simultaneously fettered the free degree of broken end monofilament swing widely, has eliminated the probability that sparking produces.The more important thing is that beat the result who twists with the fingers into rope form and make tow by the focusing thermal treatment zone time, tow and linear focused electromagnetic multiplicity improve greatly, make radio-frequency signal generator obviously improve with thermal conversion efficiency under the constant power output.Specifically realize by following steps:
1. the RF linear focusing heating mechanism that uses is transformed, between wire feeder and quartz ampoule thermal reactor, the tow twisting apparatus is set,
2. heated filament tow was twisted processing before entering the quartz ampoule thermal reactor.
So the basis that this method realizes is that existing RF linear focusing heating mechanism is improved.Comprise radio-frequency signal generator in the concrete improvement structure, the power match device, the coaxial conjugation coupling cavity of radio-frequency cable and line focus, and be located at quartz ampoule thermal reactor in the chamber, and supporting differential puts, receives a structure machine, and key is putting, be provided with the tow twisting apparatus between wire drawing mechanism and the quartz ampoule thermal reactor.
Monofilament tow at random enters the quartz ampoule thermal reactor after being processed to be rope form under the effect of twisting apparatus again.Good effect of the present invention is to have eliminated sparking basically, and the high frequency heat conversion efficiency can obviously improve.
Below in conjunction with accompanying drawing and provide the specific embodiment and further specify and the objective of the invention is how to realize.
Description of drawings
Fig. 1 be the structural representation of the radio frequency focusing formula heater after improving.
Number designation representative in the accompanying drawing: 1 represents radio-frequency signal generator, and 2 represent radio frequency adaptation, and 3 represent radio-frequency cable, and 4 represent the quartz ampoule thermal reactor, the RF-coupled chamber of 5 representatives.6 represent twisting apparatus, twist device is separated in 7 representatives, the driving mechanism of 8 representatives and twisting/backtwisting matched with devices, the framework in the twist device is twisted/is separated in the 9A representative, 9B representative is twisted/is separated in the twist device by minor axis and is positioned at negative on the framework 9A, the tensioning directive wheel that is arranged in the twist device on the negative 9C is twisted/is separated in the 9C representative, and 10 represent wire feeder.11 represent wire drawing mechanism, and 12 represent synnema, and 13,14 represent pair roller.
The specific embodiment
With reference to accompanying drawing as can be seen: add in the radio frequency method filament tow and to pine for eliminating the method for striking sparks between monofilament and realize by following steps:
The RF linear focusing heating mechanism that uses is transformed, after between wire feeder 10 and quartz ampoule thermal reactor 4, tow twisting apparatus 6 being set, just can before entering quartz ampoule thermal reactor 4, twist processing, thereby after entering quartz ampoule thermal reactor 4 and arriving the thermal treatment zone, effectively prevent spark phenomenon heated filament tow 12.
But in most application scenarios, the product that processes is used for doing composite.In order to guarantee composite base material and fiber for the bond strength between monofilament, wish that more synnema is arranged in parallel but not becomes to add to be twisted as rope form, it helps the thickness of attenuate composite and improves specific strength.
So, from quartzy thermal reactor 4 come out twisting synnema need backtwisting sometimes.For this reason in our further improved design to the transformation of the RF linear focusing arrangement that uses also be included in be provided with between quartz ampoule thermal reactor 4 and the wire drawing mechanism 11 to the twisting tow separate twist device 7, and the filament tow of drawing from the quartz ampoule thermal reactor is carried out backtwisting handles.
Provide twisting apparatus in the accompanying drawing and conciliate the structure of twist device and the specific embodiment of position:
Twisting apparatus is positioned at framework 9A between quartz ampoule thermal reactor 4 and the tow wire feeder 10, is set in negative 9B on this framework 9A, is fixed at least three tensioning directive wheel 9C on the negative and forms by the driving mechanism 8 that hollow shaft drives the negative rotation by means of hollow shaft by one, filament tow 12 from wire feeder 10 draw, behind the twisting node that pair roller 13 is formed, pass hollow shaft and walk around tensioning directive wheel 9C and enter quartz ampoule thermal reactor 4.Negative 9B produces rotation under the driving of driving mechanism 8, drives the tow rotation and produces the effect of twisting.
The said twist device of separating has and the essentially identical structure of twisting apparatus.It only is the position difference of design.Structure is positioned at framework 9A between quartz ampoule thermal reactor and the tow wire drawing mechanism, is set in the negative 9B of this framework 9A on capable, is fixed at least three tensioning directive wheel 9C on the negative and forms by the driving mechanism 8 that hollow shaft drives the negative rotation by means of hollow shaft by one, introduces wire drawing mechanism behind the backtwisting node by pair roller 14 compositions after filament tow is drawn, passed hollow shaft and walk around tensioning directive wheel 9C from quartz ampoule thermal reactor 4.Twisting apparatus or the control parameter of separating twist device are: sending, putting a speed V=2-3 rice/timesharing, revolution R=150-240 rev/min.
Provided the RF linear focusing heating mechanism schematic diagram after improving in the accompanying drawing 1.Comprise radio-frequency signal generator 1 in this apparatus structure, power match device 2, the coaxial conjugation coupling cavity 5 of radio-frequency cable 3 and line focus, and be located at quartz ampoule thermal reactor 4 in the chamber and the wire feed structure machine 10 and the wire drawing mechanism 11 of supporting differential.Crucial improvement is to be provided with tow twisting apparatus 6 between wire feeder and the quartz ampoule thermal reactor.
The improvement that the RF linear focusing arrangement that uses is carried out also be included in the twisting tow is set between quartz ampoule thermal reactor 4 and the wire drawing mechanism 11 separate twist device 7.
Said twisting apparatus is one and is positioned at framework 9A between quartz ampoule thermal reactor 4 and the tow wire feeder 10, is set in the negative 9B of this framework 9A on capable, is fixed at least three tensioning directive wheel 9C on the negative and forms by the driving mechanism 8 that hollow shaft drives the negative rotation by means of hollow shaft, filament tow 12 from wire feeder 10 draw, behind the twisting node that pair roller 13 is formed, pass hollow shaft and walk around tensioning directive wheel 9C and enter quartz ampoule thermal reactor 4.
The said twist device 7 of separating is one and is positioned at framework 9A between quartz ampoule thermal reactor 4 and the tow wire drawing mechanism 11, is set in negative 9B on this framework 9A, is fixed at least three tensioning directive wheel 9C on the negative 9B and forms by the driving mechanism 8 that hollow shaft drives the negative rotation by means of hollow shaft, introduces wire drawing mechanism 11 after forming the backtwisting nodes by pair roller 14 after the twisted fibers synnema is drawn, passed hollow shaft and walk around tensioning directive wheel 9C from quartz ampoule thermal reactor 4.
Claims (7)
1, add in the radio frequency method filament tow and pine for eliminating the method for striking sparks between monofilament, it is characterized in that this method realizes by following steps:
1. employed RF linear focusing heating mechanism is transformed, between wire feeder (10) and quartz ampoule thermal reactor (4), tow twisting apparatus (6) is set,
2. heated filament tow (12) is twisted processing before entering quartz ampoule thermal reactor (4).
3. the RF linear focusing arrangement that uses is transformed and also be included in the twist device of separating that the twisting tow is set between quartz ampoule thermal reactor (4) and the wire drawing mechanism (11), and the filament tow of drawing from the quartz ampoule thermal reactor is carried out backtwisting handle.
2, pine for eliminating the method for striking sparks between monofilament according to claim 1 said adding in the radio frequency method filament tow, it is characterized in that said twisting apparatus is the framework (9A) that is positioned between quartz ampoule thermal reactor (4) and the tow wire feeder (10) by, be set in negative (9B) on this framework (9A) by means of hollow shaft, driving mechanism (8) composition that is fixed at least three the tensioning directive wheels (9C) on the negative and rotates by hollow shaft driving negative, filament tow (12) is drawn from wire feeder (10), behind the twisting node that pair roller (13) is formed, pass hollow shaft and walk around tensioning directive wheel (9C) and enter quartz ampoule thermal reactor (4).
3, pine for eliminating the method for striking sparks between monofilament according to claim 1 said adding in the radio frequency method filament tow, it is characterized in that the said twist device of separating is the framework (9A) that is positioned between quartz ampoule thermal reactor and the tow wire drawing mechanism by, be set in negative (9B) on this framework (9A) row by means of hollow shaft, driving mechanism (8) composition that is fixed at least three the tensioning directive wheels (9C) on the negative and rotates by hollow shaft driving negative, filament tow is drawn from quartz ampoule thermal reactor (4), introduce wire drawing mechanism after passing hollow shaft and walking around the backtwisting node of tensioning directive wheel (9C) back by pair roller (14) composition.
4, pine for eliminating the method for striking sparks between monofilament according to claim 2 or 3 said adding in the radio frequency method filament tow, the control parameter that it is characterized in that said twisting apparatus or separate twist device is in retractable silk speed V=2-3 rice/timesharing, R=150-240 rev/min of twisting or backtwisting revolution.
5, and eliminate the RF linear focusing heating mechanism of the supporting design of method of striking sparks between monofilament, comprise radio-frequency signal generator (1) in the structure, power match device (2), the coaxial conjugation coupling cavity (5) of radio-frequency cable (3) and line focus, and be located at quartz ampoule thermal reactor (4) in the chamber, and supporting differential wire feeder (10), receive silk structure machine (11), it is characterized in that between wire feeder (10) and quartz ampoule thermal reactor (4), being provided with tow twisting apparatus (6), the improvement that employed RF linear focusing arrangement is carried out also be included in the twisting tow is set between quartz ampoule thermal reactor (4) and the wire drawing mechanism (11) separate twist device (7).
6, according to the said RF linear focusing heating mechanism of claim 5, it is characterized in that said twisting apparatus is a framework (9A) that is positioned between quartz ampoule thermal reactor (4) and the tow wire feeder (10), be set in negative (9B) on this framework (9A) by means of hollow shaft, driving mechanism (8) composition that is fixed at least three the tensioning directive wheels (9C) on the negative and rotates by hollow shaft driving negative (9B), filament tow (12) is drawn from wire feeder (10), behind the twisting node that pair roller (13) is formed, pass hollow shaft and walk around tensioning directive wheel (9C) and enter quartz ampoule thermal reactor (4).
7, said according to claim 5 at the RF linear focusing heating mechanism, it is characterized in that the said twist device (7) of separating is a framework (9A) that is positioned between quartz ampoule thermal reactor (4) and the tow wire drawing mechanism (11), be set in negative (9B) on this framework (9A) by means of hollow shaft, driving mechanism (8) composition that is fixed at least three the tensioning directive wheels (9C) on the negative (9B) and rotates by hollow shaft driving negative (9B), filament tow is drawn from quartz ampoule thermal reactor (4), pass hollow shaft and walk around tensioning directive wheel (9C) back by introducing wire drawing mechanism (11) behind pair roller (14) the composition backtwisting contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710062004A CN100575575C (en) | 2007-05-28 | 2007-05-28 | In radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710062004A CN100575575C (en) | 2007-05-28 | 2007-05-28 | In radio frequency method heating fiber bundle silk, eliminate the method and the device of striking sparks between monofilament |
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| CN101074504A CN101074504A (en) | 2007-11-21 |
| CN100575575C true CN100575575C (en) | 2009-12-30 |
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| CN101988222B (en) * | 2009-07-31 | 2013-11-13 | 王敬霞 | Radio-frequency heating carbon fiber graphitization continuous batching production system and method |
| CN107190387B (en) * | 2017-07-16 | 2019-06-14 | 吉祥三宝高科纺织有限公司 | A kind of production method being electromagnetically shielded covering yarn |
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