CN109596051A - A kind of high-performance carbon fibre pendency degree automatic testing equipment and method - Google Patents
A kind of high-performance carbon fibre pendency degree automatic testing equipment and method Download PDFInfo
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- CN109596051A CN109596051A CN201811365812.0A CN201811365812A CN109596051A CN 109596051 A CN109596051 A CN 109596051A CN 201811365812 A CN201811365812 A CN 201811365812A CN 109596051 A CN109596051 A CN 109596051A
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- lint retainer
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- 239000000835 fiber Substances 0.000 title claims abstract description 102
- 238000012360 testing method Methods 0.000 title claims abstract description 62
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title abstract description 15
- 238000005259 measurement Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 9
- 239000004917 carbon fiber Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Fiber Materials (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Inorganic Fibers (AREA)
Abstract
This application discloses a kind of high-performance carbon fibre pendency degree automatic testing equipment and method, wherein device include the support frame being vertically arranged, the lint retainer A for being horizontally fixed on testing jig on support frame, being slidably fixed on testing jig, the lint retainer B being fixed in the middle part of testing jig, be mounted on support frame one end and the fiber creel adjacent with lint retainer B, be fixed on testing jig separate fiber creel one end the tension regulator and fixed level meter on the tester rack for providing pre-set tension to lint retainer A；The side of support frame is provided with moveable distance measuring sensor；The bottom end of support frame is equipped with level adjuster；The controller connecting with distance measuring sensor signal is also equipped on support frame.The application realizes the integration of disjunction test, and raising detection efficiency, test result are stablized, and coefficient of dispersion is small.
Description
Technical field
The present disclosure relates generally to fiber production test technical field more particularly to a kind of high-performance carbon fibre pendency degree are automatic
Test device and method.
Background technique
Carbon fiber is that one kind has high specific strength, high ratio modulus, high temperature resistant, corrosion-resistant, antifatigue, conductive, heat transfer and heat
A series of high molecular material for excellent properties such as the coefficient of expansion is small.
Carbon fiber in production preparation process, each link all can mechanical property to carbon fiber and physical property generate very
It is big to influence, process conditions, sizing agent type, sizing agent stability and later period carbon fiber in PAN base carbon fibre production process
Dimension storage condition etc. is likely to result in carbon fiber and embrittlement phenomenon of hardening occurs, and is mainly shown as that feel is poor, bending resistance is poor,
Substantially reduce the performance of carbon fiber post-processing (fabric).
Carbon fiber pendency degree is also known as stiffness, straight elevator degree, stiffness, pendency value, after performance is to characterize carbon fiber starching
Figuration effect, indicated with the carbon fiber performance sagging because of self weight.Pendency degree is bigger, and fiber is harder crisp.Conversely, pendency degree
It is smaller, indicate that fiber is more soft.
In the prior art, the patent document that authorized announcement date 2017.05.08, Authorization Notice No. are CN107146832A
Disclose a kind of yarn pendency degree measuring device and method.Yarn pendency degree measuring device includes left mechanism for testing, yarn and the right side
Mechanism for testing, the left mechanism for testing include bottom panel A, strut rod A, cylinder, air pressure regulator and guide wheel, strut rod A's
Guide wheel, cylinder and supporting plate are sequentially installed on front surface from top to bottom；The right mechanism for testing includes bottom panel B, pillar
Bar B and hook.Test when, first pull out one, yarn, pull appropriate length yarn, by the yarn and thread head be bundled in hook by
On wheels, then the other end of yarn is bundled on output shaft；Yarn is tensed, is straightened, takes straight steel ruler by the air pressure for adjusting cylinder
Or distance measuring instrument measures at range difference maximum two on the vertical direction of yarn, the range difference of measurement is yarn
Pendency angle value.
Above-mentioned test device in the prior art needs artificial shearing fibre, may result in fibre length when being tested
It is uneven；It is manually read in reading, because fiber dangles in the air, fiber sample, which easily deviates, causes two side lengths asymmetric, and
And fiber easily front and back torsion, it is easy the influence of natural wind in tested person environment, analyzes unstable result, test data is discrete big.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, other shadows in detection process can be excluded as far as possible by being intended to provide
The factor of sound reduces the high-performance carbon fibre pendency degree automatic testing equipment and method of pendency degree testing result.
First aspect the application provides a kind of high-performance carbon fibre pendency degree automatic testing equipment, including the branch being vertically arranged
Support, is fixed on test at the lint retainer A for being horizontally fixed on testing jig on support frame, being slidably fixed on testing jig
Lint retainer B in the middle part of frame, it is mounted on support frame one end and the fiber creel adjacent with the lint retainer B, is fixed on
The tension regulator for providing pre-set tension to the lint retainer A of separate fiber creel one end of testing jig and solid
Fixed level meter on the tester rack；The side of support frame as described above is provided with the ranging sensing that can be moved in the plane of support frame
Device；The bottom end of support frame as described above is equipped with level adjuster；It is also equipped on support frame as described above and the distance measuring sensor signal
The controller of connection；Limit plate is movably disposed between tension regulator and limit clamper A on the testing jig.
According to technical solution provided by the embodiments of the present application, in the lint retainer A and fiber clamp on the testing jig
The grid spacer for keeping out the wind is additionally provided between holder B.
According to technical solution provided by the embodiments of the present application, support frame as described above be located at the fiber creel one section is provided with
The positioning ring passed through for being tested fiber.
According to technical solution provided by the embodiments of the present application, being vertically fixed on support frame as described above can be in support frame as described above
What is moved horizontally moves up and down component, it is described move up and down component include the lead screw fixed vertically, the cross bar parallel with lead screw and
Control the driving motor of lead screw rotation；The fixed block side set of the fixed distance measuring sensor on the cross bar, the other side with
The threads of lead screw connection；The driving motor is controlled by controller and is connected.
According to technical solution provided by the embodiments of the present application, the distance measuring sensor is phase laser distance measurement instrument.
According to technical solution provided by the embodiments of the present application, the controller is also clamped with the lint retainer A, fiber
Device B is connected with tension regulator signal.
According to technical solution provided by the embodiments of the present application, it is equipped in the controller for receiving distance measuring sensor signal
Signal receiving unit, for give the lint retainer A, lint retainer B, driving motor and tension regulator output control
The signal output unit of signal processed further includes for the signal of distance measuring sensor to be converted to distance signal and calculates fiber pendency
The computing unit of degree.
Second aspect, the application provide a kind of test method of high-performance carbon fibre pendency degree automatic testing equipment, including
Following steps:
Level adjuster is adjusted until the level meter on testing jig indicates level；
Fiber roll is placed on fiber creel；
Fibre bundle is pulled up out from fiber roll so that the end of fibre bundle sequentially passes through lint retainer B and fiber clamp
Holder A；
The position of mobile limit plate makes the distance between itself and lint retainer B consistent with the length of tested fiber；
Lint retainer A is moved to the position of limit plate；
Lint retainer B and lint retainer A is closed；
Tension regulator is adjusted to setting tension and is started to lint retainer A offer preloading；
Open lint retainer A so that tested section fibre naturally droops from lint retainer B；
It dangles the time in response to setting, starts controller, control distance measuring sensor is mobile to measure the outstanding of tested section fibre
Length under the state of hanging down.
According to technical solution provided by the present application, the fiber roll pulls up out fibre bundle so that the end of fibre bundle
Before sequentially passing through lint retainer B and lint retainer A further include:
Fibre bundle is passed through into positioning ring.
Technical solution provided by the present application, by designing fixed lint retainer B and moveable lint retainer A,
Without automatic disconnecting device so that the length of tested fiber is uniform, has standardized the detection of high-performance carbon fibre pendency value；The application
By the automation controls means such as distance measuring sensor, positioning device, the same of testing conditions may be implemented, and avoid artificial behaviour
Make accidental error caused by factor；Tension is applied by clamper A in the technical solution of the application simultaneously, while passing through clamper
The integration of disjunction test is realized in the fixation of B, improve detection efficiency, evade the man's activity brought into sample transfer process because
Element, therefore the technical solution test result of the application is stablized, coefficient of dispersion is small.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of schematic view of the front view of embodiment of the application；
Fig. 2 is the overlooking structure diagram of Fig. 1；
Fig. 3 is the operating process schematic diagram of the application.
Figure label:
10, support frame；
20, testing jig；
30, lint retainer A；
40, lint retainer B；
50, fiber creel；
12, level adjuster；
13, controller；
11, distance measuring sensor；
14, grid spacer；
60, tension regulator；
70, positioning ring；
21, plate is limited.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Please refer to Fig. 1 be a kind of structural schematic diagram of high-performance carbon fibre pendency degree automatic testing equipment of the application shown in,
The device includes the support frame 10 being vertically arranged, is horizontally fixed on testing jig 20 on support frame 10, is slidably fixed to test
Lint retainer A30 on frame 20, the lint retainer B 40 being fixed in the middle part of testing jig, be mounted on 10 one end of support frame and with
The lint retainer B 40 adjacent fiber creel 50, be fixed on testing jig 20 separate 50 one end of fiber creel for
The lint retainer A 30 provides the tension regulator 60 of pre-set tension, the level meter 12 being fixed on testing jig 20；It is described
The side of support frame 10 is provided with the distance measuring sensor 11 that can be moved in support frame plane；It installs the bottom end of support frame as described above 10
There is level adjuster 12；The controller 13 connecting with 11 signal of distance measuring sensor is also equipped on support frame as described above 10；Institute
It states and is movably disposed within limit plate 21 on testing jig 20 between tension regulator 60 and limit clamper A；Limit plate
21 position is used to set and indicate the position of limit clamper A30, namely is used to indicate the length of measured fixation section fibre
Degree.
It will be appreciated by those skilled in the art that lint retainer A30 and lint retainer B and tension regulator 60
Center is on same straight line；Lint retainer A30 and lint retainer B40 is manually clip in the above-described embodiments,
In other embodiments, above-mentioned two clamper may be to have the function of automatic open-close clip.
Preferably, two are additionally provided between the lint retainer A30 and lint retainer B40 on the testing jig 20
Block is used for the grid spacer 14 kept out the wind, and in the present embodiment, grid spacer 14 is located at fiber clamp close to lint retainer B30
The downward vertical of holder B40 is in the fixed link where lint retainer B 40, when fiber is sagging by lint retainer A30 release
Afterwards, it is limited between grid spacer 14.
Preferably, support frame as described above be located at the fiber creel one section is provided with the positioning ring passed through for being tested fiber
70。
Preferably, be vertically fixed on support frame as described above can be moved horizontally in support frame as described above move up and down component,
It is described to move up and down the driving motor that component includes the lead screw fixed vertically, the cross bar parallel with lead screw and control lead screw rotation；
The fixed block side set of the fixed distance measuring sensor is on the cross bar, the other side connect with the threads of lead screw；The drive
Dynamic motor is controlled by controller to be connected.
In the present embodiment, the distance measuring sensor is phase laser distance measurement instrument.
In other embodiments, the lint retainer A, lint retainer B and tension regulator are automatic device, described
Controller is also connect with the lint retainer A, lint retainer B and tension regulator signal, and controller is for controlling fiber
The folding and start and stop of clamper A, lint retainer B and tension regulator.Tension regulator for example can for by tension motor and
Axis composition is wound, is fixed with winding axis in the shaft of tension motor, the drawstring wound on axis is wound and is connect with lint retainer A,
By the size for controlling the turnning circle both controllable adjustable tension of tension motor.
When lint retainer A, lint retainer B and tension regulator are automatic device, it is equipped with and is used in the controller
Receive distance measuring sensor signal signal receiving unit, for the lint retainer A, lint retainer B, driving motor with
And the signal output unit of tension regulator output control signal, it further include for the signal of distance measuring sensor to be converted to distance
Signal and the computing unit for calculating fiber pendency degree.
Operation is followed the steps below when test:
S10, adjustment level adjuster 12 are until the level meter on testing jig 20 indicates level；Due to lint retainer A 30
It is all fixed on lint retainer B40 on horizontal testing jig, the horizontal positioned of testing jig 20 can guarantee tested fiber
Section is horizontal, avoidable the case where distorting when providing preload tension；
S20, fiber roll is placed on fiber creel；
S30, pull up out fibre bundle from fiber roll so that the end of fibre bundle sequentially pass through lint retainer B40 and
Lint retainer A30；
S40, the mobile position for limiting plate 21 make the distance between itself and lint retainer B and tested fibre bundle
Length is consistent；
S50, the position that lint retainer A is moved to limit plate；
S60, lint retainer B and lint retainer A is closed；
S70, tension regulator is adjusted to setting tension and is started to lint retainer A offer preloading；Tension regulator
The tension preloaded is provided to lint retainer A；
S80, lint retainer A is opened so that tested section fibre naturally droops from lint retainer B；Lint retainer B
The state remained closed.
S90, kept for the fiber pendency setting pendency time, in the present embodiment, set the pendency time as 2 minutes, at other
In embodiment, the setting pendency time can also be set as other times according to demand.
S100, starting controller control the length under the mobile overhang to measure tested section fibre of distance measuring sensor.
It is that can measure the pendency degree value of the section fibre by the length.In order to guarantee the accuracy of measurement, needed when measurement
By the fibre bundle of the distance measuring sensor moved up and down on component alignment pendency.
In the actual operation process, after tested fibre bundle is fixed on lint retainer B, with the fibre on fiber creel
Dimension volume disconnects；There are multiple transportable bites on lint retainer A and lint retainer B, it is outstanding to be tested fiber in first section
After hanging down, it can continue to pull out a section fibre tow from fiber creel again, repeat the process of step s10-s100；One finally measured
The average value for rolling up the overhang length of the multistage fiber of fiber can be used to evaluate the pendency degree performance of entire volume fiber.
In the above-described embodiments, controller for example other can also have volume with PLC controller etc. for single-chip microcontroller, ARM
The program of process control function.
Preferably, support frame as described above be located at the fiber creel one section is provided with the positioning passed through for being tested fiber
Ring.Positioning ring can limit the positioning of tested fiber inserting end.Further include before the s20 in aforesaid operations method and step at this time with
Lower step:
Fibre bundle is passed through into positioning ring.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (9)
1. a kind of high-performance carbon fibre pendency degree automatic testing equipment, which is characterized in that including be vertically arranged support frame, level
Fixed testing jig on the support frame, the lint retainer A being slidably fixed on testing jig, the fibre being fixed in the middle part of testing jig
Dimension clamper B, it is mounted on support frame one end and the fiber creel adjacent with the lint retainer B, is fixed on the remote of testing jig
For the tension regulator to lint retainer A offer pre-set tension and testing jig is fixed on from fiber creel one end
On level meter；The side of support frame as described above is provided with the distance measuring sensor that can be moved in the plane of support frame；The support
The bottom end of frame is equipped with level adjuster；The control connecting with the distance measuring sensor signal is also equipped on support frame as described above
Device；Limit plate is movably disposed between tension regulator and limit clamper A on the testing jig.
2. high-performance carbon fibre pendency degree automatic testing equipment according to claim 1, which is characterized in that the testing jig
On grid spacer for keeping out the wind is additionally provided between the lint retainer A and lint retainer B.
3. high-performance carbon fibre pendency degree automatic testing equipment according to claim 1 or 2, which is characterized in that the branch
Support be located at the fiber creel one section is provided with the positioning ring passed through for being tested fiber.
4. high-performance carbon fibre pendency degree automatic testing equipment according to claim 1 or 2, which is characterized in that the branch
The component that moves up and down that can be moved horizontally in support frame as described above is vertically fixed on support, the component that moves up and down includes perpendicular
The directly driving motor of fixed lead screw, the cross bar parallel with lead screw and control lead screw rotation；The fixed distance measuring sensor is consolidated
Determine block side set on the cross bar, the other side connect with the threads of lead screw；The driving motor is controlled by controller and is connected.
5. high-performance carbon fibre pendency degree automatic testing equipment according to claim 1 or 2, which is characterized in that the survey
It is phase laser distance measurement instrument away from sensor.
6. high-performance carbon fibre pendency degree automatic testing equipment according to claim 1 or 2, which is characterized in that the control
Device processed is also connect with the lint retainer A, lint retainer B and tension regulator signal.
7. high-performance carbon fibre pendency degree automatic testing equipment according to claim 6, which is characterized in that the controller
It is interior to be equipped with signal receiving unit for receiving distance measuring sensor signal, for the lint retainer A, lint retainer B,
The signal output unit of driving motor and tension regulator output control signal, further includes for by the signal of distance measuring sensor
It is converted to distance signal and calculates the computing unit of fiber pendency degree.
8. a kind of test method using high-performance carbon fibre pendency degree automatic testing equipment described in claim 1, feature
It is, the following steps are included:
Level adjuster is adjusted until the level meter on testing jig indicates level；
Fiber roll is placed on fiber creel；
Fibre bundle is pulled up out from fiber roll so that the end of fibre bundle sequentially passes through lint retainer B and lint retainer
A；
The position of mobile limit plate makes the distance between itself and lint retainer B consistent with the length of tested fiber；
Lint retainer A is moved to the position of limit plate；
Lint retainer B and lint retainer A is closed；
Tension regulator is adjusted to setting tension and is started to lint retainer A offer preloading；
Open lint retainer A so that tested section fibre naturally droops from lint retainer B；
It dangles the time in response to setting, starts controller, the mobile catenary to measure tested section fibre of control distance measuring sensor
Length under state.
9. a kind of test method using high-performance carbon fibre pendency degree automatic testing equipment according to any one of claims 8, feature
It is, the fiber roll pulls up out fibre bundle so that the end of fibre bundle sequentially passes through lint retainer B and fiber clamping
Before device A further include:
Fibre bundle is passed through into positioning ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365812.0A CN109596051A (en) | 2018-11-16 | 2018-11-16 | A kind of high-performance carbon fibre pendency degree automatic testing equipment and method |
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|---|---|---|---|
| CN201811365812.0A CN109596051A (en) | 2018-11-16 | 2018-11-16 | A kind of high-performance carbon fibre pendency degree automatic testing equipment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208502A (en) * | 2019-05-17 | 2019-09-06 | 重庆天泽新材料有限公司 | A kind of glass fibre stiffness measuring instrument and its application method |
| CN113624625A (en) * | 2021-07-14 | 2021-11-09 | 武汉长盈通光电技术股份有限公司 | Testing device and method for quantitatively evaluating hardness of optical fiber |
-
2018
- 2018-11-16 CN CN201811365812.0A patent/CN109596051A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208502A (en) * | 2019-05-17 | 2019-09-06 | 重庆天泽新材料有限公司 | A kind of glass fibre stiffness measuring instrument and its application method |
| CN113624625A (en) * | 2021-07-14 | 2021-11-09 | 武汉长盈通光电技术股份有限公司 | Testing device and method for quantitatively evaluating hardness of optical fiber |
| CN113624625B (en) * | 2021-07-14 | 2022-10-11 | 武汉长盈通光电技术股份有限公司 | Testing device and method for quantitatively evaluating hardness of optical fiber |
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Effective date of registration: 20241016 Address after: 065000 West side of Fengxiang Road, south of Longxian Road, Hebei Langfang High tech Industrial Development Zone, Anci District, Langfang City, Hebei Province Applicant after: Changsheng (Langfang) Technology Co.,Ltd. Country or region after: China Applicant after: KANGDE CARBON VALLEY TECHNOLOGY CO.,LTD. Applicant after: Hefei University of Technology Address before: 065000 Hebei Langfang Anci Langfang high tech Industrial Development Zone, Longxian Road south of Fengxiang Road West Applicant before: ZHONG AN XIN TECHNOLOGY CO.,LTD. Country or region before: China Applicant before: KANGDE CARBON VALLEY TECHNOLOGY CO.,LTD. Applicant before: Hefei University of Technology |