CN105965717A - Epoxy resin composite material granulating device - Google Patents
Epoxy resin composite material granulating device Download PDFInfo
- Publication number
- CN105965717A CN105965717A CN201610478415.9A CN201610478415A CN105965717A CN 105965717 A CN105965717 A CN 105965717A CN 201610478415 A CN201610478415 A CN 201610478415A CN 105965717 A CN105965717 A CN 105965717A
- Authority
- CN
- China
- Prior art keywords
- unit
- epoxy resin
- heating unit
- resin composite
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 32
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000012774 insulation material Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 26
- 239000007787 solid Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 229950000845 politef Drugs 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses an epoxy resin composite material granulating device, which comprises a transmission unit; the transmission unit includes a supporting frame; a conveying belt is mounted on the supporting frame; the driving shaft of the conveying belt is connected with a speed controlling box; the granulating device also comprises a material feeding unit, a heating unit and a material cutting unit; the heating unit and the material cutting unit are mounted on the supporting frame; the heating unit includes a front heating unit and a rear heating unit; and the material cutting unit is positioned between the front heating unit and the rear heating unit. The granulating device disclosed by the invention is used for changing the epoxy resin composite material from viscous liquid state into solid granule state, can perform the functions of heating, shaping and cutting simultaneously, therefore, achieves a high production efficiency, can realize continuous production, can obtain products having compact microstructure, stable performance and high quality, solves the problem that the epoxy resin composite material is liable to adhere to a granulating device, and reduces the abrasion to a machine.
Description
Technical field
The invention belongs to manufacture of materials field of mechanical technique, be specifically related to a kind of epoxy resin composite material and make
Grain device.
Background technology
Epoxy resin has excellent physics, chemical property, excellent bonding to metal and nonmetallic surface
Performance is strong, and dielectric properties are good, and set shrinkage factor is little, product size good stability, and hardness is high, pliable and tough
Property preferable, to alkali and major part solvent-stable, be widely used in national defence, each department of national economy, water
Note, impregnate, be laminated the purposes such as material, adhesive, coating.Using epoxy resin as lapping in order to carry
The intensity of high material requested, it is avoided to reveal or oxidation etc.；But epoxy resin viscosity is too big, meeting and perhaps
Multimedium face occurs bonding, and is difficult to clear up after solidifying, and machine causes bigger abrasion；And it is traditional
Prilling granulator be applicable to transport powdery, material shape or the various non-sticky materials of little bulk, such as coal dust, water
Mud, grog, clay etc., be not suitable for carry viscosity more greatly, the most runny material and mobility especially good
Material, the epoxy resin composite material prilling granulator involved by this patent is aiming at this situation and grinds
Send out.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to research and develop a kind of epoxy resin composite wood
Material prilling granulator, the problem that solution epoxy resin is prone to cohere and device causes bigger abrasion.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that and is achieved:
A kind of epoxy resin composite material prilling granulator, including delivery unit, described delivery unit includes
Bracing frame, described bracing frame is provided with conveyer belt, and the driving shaft of conveyer belt is connected with rate controlling box；Also
Including feed unit, heating unit and blank unit；Heating unit is installed on described bracing frame and cuts
Material unit, described heating unit includes front heating unit and post-heating unit, before described blank unit is positioned at
Between heating unit and post-heating unit；
Described feed unit includes that wedge shape hopper, wedge shape hopper are arranged on the bracing frame of conveyer belt front end
On, wedge shape hopper bottom is provided with discharge opening, wedge shape hopper is provided with top pressure closure, on top pressure closure
Connect the one end having conduit so that conduit is internal with wedge shape hopper to be connected, and the other end of conduit stores up with high pressure
Gas cylinder connects, and conduit is provided with pneumatic control valve door；
Described front heating unit includes the thermal insulation cover being arranged on bracing frame, and thermal insulation cover is internally installed steel
Guide frame, steel wire rack is equipped with heating tape；The structure of described post-heating unit and the knot of front heating unit
Structure is identical.
The present invention also has a following distinguishing feature:
Described blank unit includes the knife rest being arranged on bracing frame, is provided with relative to knife rest in knife rest
The cutting knife of motion, cutting knife top is provided with spine, by electromagnetic relay and reset between spine and knife rest
Spring connects so that cutting knife can move back and forth relative to knife rest lifting, it is achieved blank.
Described cutting knife is polyfluortetraethylene plate.
Be provided with flange outer on described wedge shape hopper, described top pressure closure by steel plate and fixture with
Flange outer links together.
It is provided with diaphragm seal between described flange outer and top pressure closure.
Described top pressure closure is connected with one end of conduit by snap joint.
It is also equipped with fan on the inwall of described thermal insulation cover.
It is also equipped with scraper plate on the described bracing frame bottom conveyer belt rear end.
Being equipped with anti-paste cloth on described conveyer belt, described antiseized patch is politef patch.
Being filled with insulation material in described thermal insulation cover, described insulation material is heat-preservation cotton.
The present invention compared with prior art, has the following technical effect that
(I) epoxy resin composite material is prepared as solid granular from viscous pasty state by the present invention, permissible
Completing the functions such as heating, sizing, pelletizing, therefore production efficiency is high, can realize continuous prodution simultaneously,
And finished product structure is fine and close, stable performance, quality is higher.
(II) the politef patch in the present invention can effectively solve epoxy resin composite material and is prone to
Stick to the problem on prilling granulator, reduce the abrasion to machine.
(III) present invention can by rate controlling box meet the dilute viscosity resin of variety classes solidify accordingly time
Between；And also discharging speed can be made to match with conveyer belt transmission speed, no by regulation air pressure size
Cause the phenomenon producing material stacking or breaking.
(IV) assembly of the invention uses twice solidification, and the mode of intermediate granulation to be combined epoxy resin
Material carries out pelletize, the strip material of semi-solid preparation is carried out pelletize to cutting knife in whole granulation process
Prescription reduce, the cut-out pelletize of strip material of being more convenient for, the graininess finished product eventually formed does not connects
Grain, content of powder is low.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is that structural representation faced by the single unit system of the present invention.
Fig. 3 is the structural representation of the delivery unit of the present invention.
Fig. 4-1 is the side-looking structural representation of the feed unit of the present invention..
Fig. 4-2 be the wedge shape hopper of the present invention face structural representation.
Fig. 5-1 be the heating unit of the present invention face structural representation.
Fig. 5-2 is the side-looking structural representation of the heating unit of the present invention.
Fig. 5-3 is the plan structure schematic diagram of the heating unit of the present invention.
Fig. 6 be the blank unit of the present invention face structural representation.
In figure, the implication of each label is: 1-delivery unit, 2-feed unit, 3-heating unit, and 4-cuts
Material unit, 5--strip material, 6-graininess finished product；
(1-1)-bracing frame, (1-2)-conveyer belt, (1-3)-driving shaft, (1-4)-rate controlling box,
(1-5)-scraper plate, (1-6)-antiseized patch,
(2-1)-wedge shape hopper, (2-2)-discharge opening, (2-3)-top pressure closure, (2-4)-conduit,
(2-5)-high-pressure gas cylinder, (2-6)-pneumatic control valve door, (2-7)-flange outer, (2-8)-
Steel plate, (2-9)-fixture, (2-10)-diaphragm seal, (2-11)-snap joint；
(3-1)-front heating unit, (3-2)-post-heating unit, (3-3)-thermal insulation cover, (3-4)-
Steel wire rack, (3-5)-heating tape, (3-6)-fan, (3-7)-insulation material；
(4-1)-knife rest, (4-2)-cutting knife, (4-3)-spine, (4-4)-electromagnetic relay, (4-5)
-back-moving spring connects.
Below in conjunction with accompanying drawing, the particular content of the present invention is further explained in detail explanation.
Detailed description of the invention
The specific embodiment of the present invention given below, it should be noted that the invention is not limited in following
Specific embodiment, all equivalents done on the basis of technical scheme each fall within the guarantor of the present invention
Protect scope.
Embodiment:
Deferring to technique scheme, as shown in Figures 1 to 6, it is multiple that the present embodiment provides a kind of epoxy resin
Condensation material prilling granulator, including delivery unit 1, described delivery unit 1 includes bracing frame 1-1, institute
The driving shaft 1-3 and rate controlling box 1-4 of conveyer belt 1-2, conveyer belt 1-2 are installed on the bracing frame 1-1 stated
It is connected；Also include feed unit 2, heating unit 3 and blank unit 4；On described bracing frame 1-1
Heating unit 3 and blank unit 4 are installed, described heating unit 3 include front heating unit 3-1 and after
Heating unit 3-2, described blank unit 4 is between front heating unit 3-1 and post-heating unit 3-2；
Described feed unit 2 includes that wedge shape hopper 2-1, wedge shape hopper 2-1 are arranged on conveyer belt 1-2
On front support frame 1-1, wedge shape hopper 2-1 bottom is provided with discharge opening 2-2, and wedge shape hopper 2-1 pacifies
Equipped with top pressure closure 2-3, top pressure closure 2-3 connects and has one end of conduit 2-4 so that conduit 2-4
Connecting with wedge shape hopper 2-1 inside, the other end of conduit 2-4 connects with high-pressure gas cylinder 2-5, conduit
Pneumatic control valve door 2-6 is installed on 2-4.Discharging speed and the biography of discharge opening 2-2 is made for regulating air pressure
Send the band 1-2 speed of service to match, material stacking or the phenomenon broken will not be produced.
Described front heating unit 3-1 includes the thermal insulation cover 3-3 being arranged on bracing frame 1-1, thermal insulation cover
3-3 is internally installed steel wire rack 3-4, and steel wire rack 3-4 is equipped with heating tape 3-5；Described post-heating
The structure of unit 3-2 is identical with the structure of front heating unit 3-1.Controlled by regulation rate controlling box 1-4
Material, through the time of thermal insulation cover 3-3, meets the dilute thick resin of variety classes corresponding hardening time.
Blank unit 4 can use the most commercially available cutoff device, it would however also be possible to employ the present embodiment provides
Blank unit 4 carries out blank.The blank unit 4 that the present embodiment provides includes being arranged on bracing frame 1-1
Knife rest 4-1, be provided with in knife rest 4-1 relative to knife rest 4-1 motion cutting knife 4-2, cutting knife 4-2 top
End is provided with spine 4-3, by electromagnetic relay 4-4 and back-moving spring between spine 4-3 and knife rest 4-1
4-5 connects so that cutting knife 4-2 can move back and forth relative to knife rest 4-1 lifting, it is achieved blank.
Cutting knife 4-2 is polyfluortetraethylene plate, prevents material from sticking on cutting knife.
Flange outer 2-7, described top pressure closure 2-3 it is provided with by steel plate 2-8 on wedge shape hopper 1-1
Link together with flange outer 2-7 with fixture 2-9, prevent fixture 2-9 from accommodating tension and make top pressure closure
Deform.
Diaphragm seal 2-10 it is provided with, to wedge shape hopper with close between flange outer 2-7 and top pressure closure 2-3
Bind and seal between lid.
Top pressure closure 2-3 is connected by one end of snap joint 2-11 and conduit 2-4.
Fan 3-6 it is also equipped with on the inwall of thermal insulation cover 3-3.
It is also equipped with scraper plate 1-5 on bracing frame 1-1 bottom conveyer belt 1-2 rear end, makes the grain after solidification
Shape finished product departs from conveyer belt by scraper plate 1-5.
Being equipped with anti-paste cloth 1-6 on conveyer belt 1-2, described antiseized patch 1-6 is politef
Patch, can effectively solve the problem that epoxy resin composite material is easily adhered on conveyer belt 1-2.
Being filled with insulation material 3-7, described insulation material 3-7 in thermal insulation cover 3-3 is heat-preservation cotton.
The work process of the present invention is as described below:
By feed unit 2, front heating unit 3-1, post-heating list 3-2 and cutter unit 4 according to above-mentioned
Described order is arranged on bracing frame 1-1, then by the raw material of epoxy resin composite material good for mixing
Compound is poured in wedge shape hopper 2-1, with fixture 2-9 by diaphragm seal 2-10, top pressure closure 2-3, steel
The flange outer 2-7 clamping of plate 2-8 and wedge shape hopper 2-1, by conduit 2-4 and snap joint 2-11
High-pressure gas cylinder 2-5 is linked together with wedge shape hopper 2-1.Heating and thermal insulation cover 3-3, makes thermal insulation cover
Temperature in 3-3 reaches the solidification temperature needed for epoxy resin composite material；It is combined further according to epoxy resin
Regulate rate controlling box 1-4 the hardening time of material, make conveyer belt 1-2 reach the speed set, regulate electromagnetism
Relay 4-4 makes the cutting frequency of cutting knife 4-2 match with the speed of conveyer belt 1-2.
Opening pneumatic control valve door 2-6, the raw material compound of epoxy resin composite material is led to by gases at high pressure
Cross discharge opening 2-2 extrusion, regulate pneumatic control valve door 2-6, make discharging speed and conveyer belt 1-2 speed
Match, material stacking or the phenomenon broken will not be produced.Strip material from wedge shape hopper 2-1 extrusion
After 5 by the thermal insulation cover 3-3 of front heating unit 3-1, it is not fully cured, after cutting knife 4-2 pelletize,
Obtaining semi-solid preparation granular material, semi-solid preparation granular material enters the thermal insulation cover 3-1 of post-heating unit 3-2
After be fully cured, obtain graininess finished product 6, graininess finished product 6 departs from conveyer belt 1-2 by scraper plate 2-5.
Claims (10)
1. an epoxy resin composite material prilling granulator, including delivery unit (1), described transmission
Unit (1) includes bracing frame (1-1), and described bracing frame (1-1) is provided with conveyer belt (1-2),
The driving shaft (1-3) of conveyer belt (1-2) is connected with rate controlling box (1-4), it is characterised in that: also include
Feed unit (2), heating unit (3) and blank unit (4)；On described bracing frame (1-1)
Being provided with heating unit (3) and blank unit (4), before described heating unit (3) includes, heating is single
Unit (3-1) and post-heating unit (3-2), described blank unit (4) is positioned at front heating unit (3-1)
And between post-heating unit (3-2)；
Described feed unit (2) includes that wedge shape hopper (2-1), wedge shape hopper (2-1) are arranged on
On the bracing frame (1-1) of conveyer belt (1-2) front end, wedge shape hopper (2-1) bottom is provided with discharge opening
(2-2), wedge shape hopper (2-1) is provided with top pressure closure (2-3), on top pressure closure (2-3)
Connect the one end having conduit (2-4) so that conduit (2-4) is internal with wedge shape hopper (2-1) to be connected,
The other end of conduit (2-4) connects with high-pressure gas cylinder (2-5), and conduit (2-4) is provided with air pressure
Control valve (2-6)；
Described front heating unit (3-1) includes the thermal insulation cover (3-3) being arranged on bracing frame (1-1),
Thermal insulation cover (3-3) is internally installed steel wire rack (3-4), and steel wire rack (3-4) is equipped with heating tape (3-5)；
The structure of described post-heating unit (3-2) is identical with the structure of front heating unit (3-1).
2. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
The blank unit (4) stated includes the knife rest (4-1) being arranged on bracing frame (1-1), knife rest (4-1)
Inside being provided with the cutting knife (4-2) moved relative to knife rest (4-1), cutting knife (4-2) top is provided with ridge
Beam (4-3), by electromagnetic relay (4-4) and reset between spine (4-3) and knife rest (4-1)
Spring (4-5) connects so that cutting knife (4-2) can move back and forth relative to knife rest (4-1) lifting,
Realize blank.
3. epoxy resin composite material prilling granulator as claimed in claim 2, it is characterised in that institute
The cutting knife (4-2) stated is polyfluortetraethylene plate.
4. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
Being provided with flange outer (2-7) on the wedge shape hopper (1-1) stated, described top pressure closure (2-3) leads to
Cross steel plate (2-8) and fixture (2-9) links together with flange outer (2-7).
5. epoxy resin composite material prilling granulator as claimed in claim 4, it is characterised in that institute
It is provided with diaphragm seal (2-10) between flange outer (2-7) and the top pressure closure (2-3) stated.
6. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
The top pressure closure (2-3) stated is connected with one end of conduit (2-4) by snap joint (2-11).
7. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
It is also equipped with fan (3-6) on the inwall of the thermal insulation cover (3-3) stated.
8. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
It is also equipped with scraper plate (1-5) on the bracing frame (1-1) bottom conveyer belt (1-2) rear end stated.
9. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
Being equipped with anti-paste cloth (1-6) on the conveyer belt (1-2) stated, described antiseized patch (1-6) is poly-
Tetrafluoroethene patch.
10. epoxy resin composite material prilling granulator as claimed in claim 1, it is characterised in that institute
Being filled with insulation material (3-7) in the thermal insulation cover (3-3) stated, described insulation material (3-7) is for protecting
Wen Mian.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478415.9A CN105965717B (en) | 2016-06-27 | 2016-06-27 | Epoxy resin composite material granulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478415.9A CN105965717B (en) | 2016-06-27 | 2016-06-27 | Epoxy resin composite material granulating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105965717A true CN105965717A (en) | 2016-09-28 |
| CN105965717B CN105965717B (en) | 2017-04-19 |
Family
ID=57019207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610478415.9A Active CN105965717B (en) | 2016-06-27 | 2016-06-27 | Epoxy resin composite material granulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105965717B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231161A (en) * | 2020-01-18 | 2020-06-05 | 李亚 | Preheating treatment process before plastic particle injection molding |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010097466A1 (en) * | 2009-02-27 | 2010-09-02 | Dsm Ip Assets B.V. | Polymer granulation process and polymer granulates |
| CN101835578A (en) * | 2007-10-23 | 2010-09-15 | 奥托马蒂克塑料机械有限公司 | Continuous casting device for producing pellets from plastic material and method for operating the same |
-
2016
- 2016-06-27 CN CN201610478415.9A patent/CN105965717B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835578A (en) * | 2007-10-23 | 2010-09-15 | 奥托马蒂克塑料机械有限公司 | Continuous casting device for producing pellets from plastic material and method for operating the same |
| WO2010097466A1 (en) * | 2009-02-27 | 2010-09-02 | Dsm Ip Assets B.V. | Polymer granulation process and polymer granulates |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231161A (en) * | 2020-01-18 | 2020-06-05 | 李亚 | Preheating treatment process before plastic particle injection molding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105965717B (en) | 2017-04-19 |
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Effective date of registration: 20240410 Address after: 710065 No. 101, South Second Street, Miaojiazhuang, Lingnuo Township, High tech Zone, Xi'an City, Shaanxi Province Patentee after: Xi'an Hengdao Zhiyuan Material Technology Co.,Ltd. Country or region after: China Address before: 710064 No. 126 central section of South Ring Road, Yanta District, Xi'an, Shaanxi Patentee before: CHANG'AN University Country or region before: China |