CN111169009A - 3D printing nozzle capable of being cleaned rapidly - Google Patents
3D printing nozzle capable of being cleaned rapidly Download PDFInfo
- Publication number
- CN111169009A CN111169009A CN202010149008.XA CN202010149008A CN111169009A CN 111169009 A CN111169009 A CN 111169009A CN 202010149008 A CN202010149008 A CN 202010149008A CN 111169009 A CN111169009 A CN 111169009A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- fixedly connected
- hole
- water tank
- connecting pipeline
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Abstract
The invention discloses a 3D printing spray head capable of being quickly cleaned, which comprises a water tank, wherein a nozzle is fixedly connected to the lower end of the water tank, a spray nozzle is arranged in the nozzle in a vertically through mode, a water storage cavity with an upward opening is arranged in the water tank and used for storing water, a connecting pipeline is fixedly connected to the inner wall of the lower side of the water storage cavity, a through hole is formed in the connecting pipeline in a vertically through mode and communicated with the spray nozzle, and a pump is fixedly connected to the upper end of the connecting pipeline.
Description
Technical Field
The invention relates to the field of 3D printing, in particular to a 3D printing nozzle capable of being cleaned quickly.
Background
3D printing is a rapid prototyping technique, also known as additive manufacturing, which is a technique that builds objects by using bondable materials such as powdered metal or plastic and the like and printing layer by layer on the basis of a digital model file.
The 3D printing nozzle has the advantages that a plurality of bonding materials are used in 3D printing, the bonding materials are easy to stick to the printing nozzle after printing is finished, the nozzle needs to be cleaned in order to prevent the nozzle from being blocked, due to the fact that the bonding materials are different and the types of cleaning liquids are different, appropriate cleaning liquids need to be prepared before cleaning, cleaning steps are multiple, the size of a common nozzle is small, and the interior of the nozzle is inconvenient to clean.
Disclosure of Invention
In order to solve the problems, the 3D printing nozzle capable of being cleaned quickly is designed in the embodiment, the 3D printing nozzle capable of being cleaned quickly comprises a water tank, a nozzle is fixedly connected to the lower end of the water tank, a nozzle is arranged in the nozzle in a vertically through mode, a water storage cavity with an upward opening is arranged in the water tank and used for storing water, a connecting pipeline is fixedly connected to the inner wall of the lower side of the water storage cavity, a through hole is formed in the connecting pipeline in a vertically through mode and communicated with the nozzle, a pump is fixedly connected to the upper end of the connecting pipeline, an adhesive material is pumped into the through hole by the pump and is sprayed out through the nozzle for printing, a connecting block is fixedly connected to the upper end of the pump, an interface with an upward opening is arranged in the connecting block, the connecting block is connected with a 3D printer through the interface, and a mixing mechanism is connected, the preparation mechanism comprises a sliding plate which is arranged in the water storage cavity in a sliding manner, the sliding plate is connected to the connecting pipeline in a sliding manner, the upper end of the sliding plate is fixedly connected with four liquid storage pipes, liquid storage cavities with downward openings are arranged in the liquid storage pipes, four different cleaning agents are stored in the four liquid storage cavities respectively, four control valves are fixedly arranged in the sliding plate and are respectively communicated with the four liquid storage cavities, the corresponding control valves are controlled and started according to bonding materials used in printing, so that the corresponding cleaning agents in the liquid storage cavities are injected into the water storage cavities and are mixed with water in the water storage cavities to prepare proper cleaning fluid, fixed blocks are arranged on the upper side of the water tank and are fixedly connected to the connecting pipeline, feeding motors are fixedly arranged in the fixed blocks in a left-right symmetrical manner, and the lower ends of the feeding motors are dynamically connected with lead screws, the upper end of the sliding plate is fixedly connected with a moving rod in a bilateral symmetry manner, a threaded hole with an upward opening is formed in the moving rod, the lower end of the screw rod extends into the threaded hole and is in threaded connection with the moving rod, two pressure valves are fixedly arranged in the connecting pipeline, after the cleaning solution in the water storage cavity is prepared, the feeding motor is started, the moving rod is driven by the screw rod to descend, the sliding plate is driven to descend, the cleaning solution in the water storage cavity is squeezed into the through hole and the nozzle through the pressure valves, a sealing cover is arranged on the lower side of the nozzle, the sealing cover can seal the opening on the lower side of the nozzle to prevent the cleaning solution from leaking during cleaning, a groove with an upward opening is formed in the sealing cover, the nozzle is clamped by the groove, a driving motor is fixedly arranged in the sealing cover, and a cleaning mechanism is dynamically, the cleaning mechanism comprises a driving screw which is in power connection with the upper end of the driving motor, a telescopic rod is arranged between the through hole and the nozzle in a sliding manner, a connecting hole with a downward opening is arranged in the telescopic rod, the upper end of the driving screw extends into the connecting hole and is in threaded connection with the telescopic rod, the driving motor is started, the telescopic rod is driven by the driving screw to ascend, the telescopic rod is further driven to extend into the through hole, two spring grooves are symmetrically arranged in the telescopic rod in a bilateral manner, clamping blocks are arranged in the spring grooves in a sliding manner, an electromagnetic spring is fixedly connected between the clamping blocks and the inner wall of the spring groove on the side far away from the driving screw, clamping grooves with opposite openings are symmetrically arranged in the driving screw in the bilateral manner, and when the telescopic rod ascends until the clamping blocks face the clamping grooves, the clamping blocks are pushed to be clamped, at the moment, the driving screw is connected with the telescopic rod through the clamping block, so that the driving screw drives the telescopic rod to synchronously rotate, the nozzle and the cleaning liquid in the through hole are stirred, and the nozzle and the bonding material on the inner wall of the through hole are cleaned. Preferably, the left end and the right end of the telescopic rod are symmetrically provided with limiting probes, when the telescopic rod is located at the lower limit position, the limiting probes are right opposite to the pressure valve, the limiting probes control and open the pressure valve, and the sealing cover just seals the opening at the lower side of the nozzle at the moment.
Preferably, the lower end of the sealing cover is fixedly connected with a manual switch, and the manual switch controls the starting of the driving motor.
But preferably, the water tank left and right ends symmetry has linked firmly the inlet tube, it is equipped with inhalant canal to link up in the inlet tube, the inhalant canal internal fixation has the opening orientation the water valve in retaining chamber, through inhalant canal to retaining chamber can add water again, the water valve can avoid the washing liquid to flow in the inhalant canal when the sliding plate glides.
The invention has the beneficial effects that: according to the invention, the spray head can be taken down from the 3D printer for cleaning, the operation is convenient, and the proper cleaning liquid can be rapidly prepared according to the bonding material, so that the cleaning efficiency can be improved, and the telescopic rod can extend into the through hole for rotating and stirring the cleaning liquid, so that the cleaning effect is improved.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
Fig. 1 is a schematic view of an overall structure of a 3D printing nozzle capable of being rapidly cleaned according to the present invention;
3 FIG. 32 3 is 3 a 3 schematic 3 view 3 of 3 the 3 structure 3 in 3 the 3 direction 3 " 3 A 3- 3 A 3" 3 of 3 FIG. 31 3; 3
FIG. 3 is an enlarged schematic view of "B" of FIG. 1;
FIG. 4 is an enlarged schematic view of "C" of FIG. 3;
fig. 5 is an enlarged schematic view of "D" of fig. 3.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a 3D printing nozzle capable of being quickly cleaned, which comprises a water tank 14, wherein the lower end of the water tank 14 is fixedly connected with a nozzle 13, a nozzle 39 is arranged in the nozzle 13 in a vertically through manner, a water storage cavity 33 with an upward opening is arranged in the water tank 14, the water storage cavity 33 is used for storing water, a connecting pipeline 27 is fixedly connected on the inner wall of the lower side of the water storage cavity 33, a through hole 28 is arranged in the connecting pipeline 27 in a vertically through manner, the through hole 28 is communicated with the nozzle 39, the upper end of the connecting pipeline 27 is fixedly connected with a pump 24, the pump 24 pumps bonding materials into the through hole 28 and sprays out through the nozzle 39 for printing, the upper end of the pump 24 is fixedly connected with a connecting block 25, a connector 26 with an upward opening is arranged in the connecting block 25, the connecting block 25 is connected with a 3D printer through the connector 26, and an adjusting and matching mechanism, the adjusting and matching mechanism 100 comprises a sliding plate 19 slidably arranged in the water storage cavity 33, the sliding plate 19 is slidably connected to the connecting pipeline 27, the upper end of the sliding plate 19 is fixedly connected with four liquid storage pipes 20, liquid storage cavities 21 with downward openings are arranged in the liquid storage pipes 20, four different cleaning agents are respectively stored in the four liquid storage cavities 21, four control valves 32 are fixedly arranged in the sliding plate 19, the four control valves 32 are respectively communicated with the four liquid storage cavities 21, the corresponding control valves 32 are controlled to be started according to bonding materials used in printing, so that the corresponding cleaning agents in the liquid storage cavities 21 are injected into the water storage cavity 33 and mixed with water in the water storage cavity 33 to be adjusted into proper cleaning liquid, a fixed block 23 is arranged on the upper side of the water tank 14, and the fixed block 23 is fixedly connected to the connecting pipeline 27, the cleaning machine is characterized in that feed motors 22 are fixedly arranged in the fixed block 23 in a bilateral symmetry manner, the lower ends of the feed motors 22 are in power connection with lead screws 29, the upper end of the sliding plate 19 is fixedly connected with moving rods 30 in a bilateral symmetry manner, threaded holes 31 with upward openings are formed in the moving rods 30, the lower ends of the lead screws 29 extend into the threaded holes 31 and are in threaded connection with the moving rods 30, two pressure valves 34 are fixedly arranged in the connecting pipeline 27, after cleaning liquid in the water storage cavity 33 is prepared, the feed motors 22 are started, the moving rods 30 are driven to descend through the lead screws 29, the sliding plate 19 is driven to descend, the cleaning liquid in the water storage cavity 33 is squeezed into the through holes 28 and the nozzles 39 through the pressure valves 34, the lower sides of the nozzles 13 are provided with sealing covers 11, and the sealing covers 11 can seal the openings at the lower sides of the nozzles 39, cleaning liquid is prevented from leaking during cleaning, a groove 12 with an upward opening is formed in the sealing cover 11, the nozzle 13 is clamped by the groove 12, a driving motor 37 is fixedly arranged in the sealing cover 11, the upper end of the driving motor 37 is in power connection with a cleaning mechanism 101, the cleaning mechanism 101 comprises a driving screw 36 which is in power connection with the upper end of the driving motor 37, an expansion link 35 is arranged between the through hole 28 and the nozzle 39 in a sliding manner, a connecting hole 40 with a downward opening is formed in the expansion link 35, the upper end of the driving screw 36 extends into the connecting hole 40 and is in threaded connection with the expansion link 35, the driving motor 37 is started, the expansion link 35 is driven to ascend through the driving screw 36, the expansion link 35 extends into the through hole 28, two spring grooves 45 are symmetrically arranged in the expansion link 35 in a left-right manner, and clamping blocks 44 are arranged in the, the fixture block 44 and the spring groove 45 are far away from the inner wall of one side of the driving screw rod 36, the electromagnetic springs 43 are fixedly connected between the inner walls of the two sides of the driving screw rod 36, the clamping grooves 42 with opposite openings are symmetrically arranged in the driving screw rod 36, when the telescopic rod 35 rises until the fixture block 44 is right opposite to the clamping grooves 42, the electromagnetic springs 43 push the fixture block 44 to be clamped in the clamping grooves 42 under the elastic force action, at the moment, the driving screw rod 36 passes through the fixture block 44 and the telescopic rod 35 to be connected, then the driving screw rod 36 drives the telescopic rod 35 to synchronously rotate, so that the cleaning liquid in the nozzle 39 and the through hole 28 is stirred, and the adhesive material on the inner wall of the nozzle 39 and the through hole.
Advantageously, the left end and the right end of the telescopic rod 35 are symmetrically provided with limit probes 41, when the telescopic rod 35 is located at the lower limit position, the limit probes 41 are right opposite to the pressure valve 34, at this time, the limit probes 41 control and open the pressure valve 34, and at this time, the sealing cover 11 just seals the lower opening of the spout 39.
Advantageously, a manual switch 38 is attached to the lower end of the sealing cap 11, said manual switch 38 controlling the activation of the drive motor 37.
Advantageously, the left end and the right end of the water tank 14 are symmetrically fixedly connected with a water inlet pipe 17, a water inlet channel 16 is arranged in the water inlet pipe 17 in a penetrating manner, a water valve 15 with an opening facing the water storage cavity 33 is fixedly arranged in the water inlet channel 16, water can be added into the water storage cavity 33 again through the water inlet channel 16, and the water valve 15 can prevent the cleaning liquid from flowing into the water inlet channel 16 when the sliding plate 19 slides downwards.
The following describes in detail the use steps of a 3D printing head capable of being rapidly cleaned according to the present disclosure with reference to fig. 1 to 5:
initially, the slide plate 19 is in the upper limit position, in which the pressure valve 34 is in the closed position, in which the sealing cap 11 is not connected to the nozzle 13, and in which the telescopic rod 35 and the driving screw 36 do not extend into the spout 39 and the through hole 28.
After printing, the connecting block 25 is taken down from the printer, and the corresponding control valve 32 is started according to the type of the bonding material, so that the corresponding cleaning agent in the liquid storage cavity 21 is added into the water storage cavity 33, and the cleaning agent and water are mixed and prepared into cleaning liquid.
At this time, the sealing cover 11 is connected with the nozzle 13, the expansion link 35 and the driving screw 36 extend into the spout 39 and the through hole 28, when the limiting probe 41 is opposite to the pressure valve 34, the sealing cover 11 just seals the opening at the lower side of the spout 39, the pressure valve 34 is opened at this time, the feeding motor 22 is started at this time, the moving rod 30 is driven to descend through the lead screw 29, the sliding plate 19 is driven to descend, and the cleaning liquid in the water storage cavity 33 is squeezed into the spout 39 and the through hole 28 through the pressure valve 34.
At this moment, the manual switch 38 is manually started, the driving motor 37 is further started, the driving screw 36 drives the telescopic rod 35 to ascend and extend into the through hole 28, when the clamping block 44 is right opposite to the clamping groove 42, the clamping block 44 is pushed under the elastic action of the electromagnetic spring 43 to be clamped into the clamping groove 42, the driving screw 36 drives the telescopic rod 35 to synchronously rotate at this moment, the cleaning liquid in the nozzle 39 and the through hole 28 is further stirred, and then the bonding material in the nozzle 39 and the through hole 28 is cleaned.
The electromagnetic spring 43 is electrified and drives the clamping block 44 to be separated from the clamping groove 42, the driving motor 37 is started reversely at the moment, the telescopic rod 35 is driven to descend, the sealing cover 11 is taken down at the moment, the cleaning liquid in the nozzle 39 and the through hole 28 flows out through the opening at the lower side of the nozzle 39 at the moment, and the bonding material remained in the nozzle 39 and the through hole 28 is taken out.
The feed motor 22 is started in the reverse direction to reset, so that the sliding plate 19 is driven to ascend, water is added into the water storage cavity 33 again through the water inlet channel 16 at the moment, and the used liquid storage pipe 20 is replaced at the moment.
The invention has the beneficial effects that: according to the invention, the spray head can be taken down from the 3D printer for cleaning, the operation is convenient, and the proper cleaning liquid can be rapidly prepared according to the bonding material, so that the cleaning efficiency can be improved, and the telescopic rod can extend into the through hole for rotating and stirring the cleaning liquid, so that the cleaning effect is improved.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (4)
1. The utility model provides a 3D that can wash fast prints shower nozzle which characterized in that: the water tank is characterized by comprising a water tank, wherein a nozzle is fixedly connected to the lower end of the water tank, a nozzle is arranged in the nozzle in a vertically through manner, a water storage cavity with an upward opening is arranged in the water tank and used for storing water, a connecting pipeline is fixedly connected to the inner wall of the lower side of the water storage cavity, a through hole is formed in the connecting pipeline in a vertically through manner and communicated with the nozzle, a pump is fixedly connected to the upper end of the connecting pipeline, an adhesive material is pumped into the through hole by the pump, a connecting block is fixedly connected to the upper end of the pump, an interface with an upward opening is arranged in the connecting block, and the connecting; a regulating mechanism is connected between the water tank and the connecting pipeline, the regulating mechanism comprises a sliding plate which is slidably arranged in the water storage cavity, the sliding plate is slidably connected with the connecting pipeline, the upper end of the sliding plate is fixedly connected with four liquid storage pipes, liquid storage cavities with downward openings are arranged in the liquid storage pipes, four different cleaning agents are respectively stored in the four liquid storage cavities, four control valves are fixedly arranged in the sliding plate, and the four control valves are respectively communicated with the four liquid storage cavities; the upper side of the water tank is provided with a fixed block which is fixedly connected with the connecting pipeline, a feed motor is fixedly arranged in the fixed block in a bilateral symmetry manner, the lower end of the feed motor is in power connection with a screw rod, the upper end of the sliding plate is fixedly connected with a moving rod in a bilateral symmetry manner, a threaded hole with an upward opening is formed in the moving rod, and the lower end of the screw rod extends into the threaded hole and is in threaded connection with the moving rod; two pressure valves are fixedly arranged in the connecting pipeline; a sealing cover is arranged on the lower side of the nozzle, the sealing cover can seal an opening on the lower side of the nozzle, a groove with an upward opening is formed in the sealing cover, and the nozzle is clamped by the groove; the sealing cover is internally and fixedly provided with a driving motor, the upper end of the driving motor is connected with a cleaning mechanism in a power mode, the cleaning mechanism comprises a driving screw connected to the upper end of the driving motor in a power mode, a telescopic rod is arranged between the through hole and the nozzle in a sliding mode, a connecting hole with a downward opening is formed in the telescopic rod, the upper end of the driving screw stretches into the connecting hole and is in threaded connection with the telescopic rod, two spring grooves are formed in the telescopic rod in a bilateral symmetry mode, a clamping block is arranged in each spring groove in a sliding mode, the clamping block is far away from the spring grooves, an electromagnetic spring is fixedly connected between the inner walls of one side of the driving screw, and clamping.
2. The 3D printing head of claim 1, wherein: the left end and the right end of the telescopic rod are symmetrically provided with limiting probes.
3. The 3D printing head of claim 1, wherein: the lower end of the sealing cover is fixedly connected with a manual switch.
4. The 3D printing head of claim 1, wherein: the water tank left and right ends symmetry has linked firmly the inlet tube, link up in the inlet tube and be equipped with inhalant canal, inhalant canal internal stability has the opening to the water valve in retaining chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149008.XA CN111169009B (en) | 2020-03-05 | 2020-03-05 | 3D printing nozzle capable of being cleaned rapidly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010149008.XA CN111169009B (en) | 2020-03-05 | 2020-03-05 | 3D printing nozzle capable of being cleaned rapidly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111169009A true CN111169009A (en) | 2020-05-19 |
| CN111169009B CN111169009B (en) | 2020-12-15 |
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ID=70625144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010149008.XA Active CN111169009B (en) | 2020-03-05 | 2020-03-05 | 3D printing nozzle capable of being cleaned rapidly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111169009B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105125315A (en) * | 2015-06-25 | 2015-12-09 | 浙江大学 | Automatic filling and cleaning nozzle used for biological tissue manufacturing and control method thereof |
| CN205651666U (en) * | 2016-05-13 | 2016-10-19 | 昆山英福斯三维科技有限公司 | 3D printer of shower nozzle is washd in area |
| CN106738929A (en) * | 2017-01-20 | 2017-05-31 | 深圳市贝优通新能源技术开发有限公司 | A kind of 3D printer with automatic clearing function |
| CN106738863A (en) * | 2017-01-20 | 2017-05-31 | 深圳市玖品空气净化科技有限公司 | A kind of screw feed formula 3D printing head |
| CN209534181U (en) * | 2019-02-18 | 2019-10-25 | 甘肃机电职业技术学院（甘肃省机械工业学校、甘肃省机械高级技工学校） | A kind of 3D printer nozzle cleaning device |
| WO2019225885A1 (en) * | 2018-05-25 | 2019-11-28 | Shin Dongwon | Construction 3d printer concrete nozzle device and construction 3d printer comprising same |
-
2020
- 2020-03-05 CN CN202010149008.XA patent/CN111169009B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105125315A (en) * | 2015-06-25 | 2015-12-09 | 浙江大学 | Automatic filling and cleaning nozzle used for biological tissue manufacturing and control method thereof |
| CN205651666U (en) * | 2016-05-13 | 2016-10-19 | 昆山英福斯三维科技有限公司 | 3D printer of shower nozzle is washd in area |
| CN106738929A (en) * | 2017-01-20 | 2017-05-31 | 深圳市贝优通新能源技术开发有限公司 | A kind of 3D printer with automatic clearing function |
| CN106738863A (en) * | 2017-01-20 | 2017-05-31 | 深圳市玖品空气净化科技有限公司 | A kind of screw feed formula 3D printing head |
| WO2019225885A1 (en) * | 2018-05-25 | 2019-11-28 | Shin Dongwon | Construction 3d printer concrete nozzle device and construction 3d printer comprising same |
| CN209534181U (en) * | 2019-02-18 | 2019-10-25 | 甘肃机电职业技术学院（甘肃省机械工业学校、甘肃省机械高级技工学校） | A kind of 3D printer nozzle cleaning device |
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| Publication number | Publication date |
|---|---|
| CN111169009B (en) | 2020-12-15 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20201119 Address after: 404700 18-2, 215 Guangdong East Road, Gaotang street, Wushan County, Chongqing Applicant after: Wushan gorge film and television media Co.,Ltd. Address before: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Applicant before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20201119 Address after: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Applicant after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: Room 5-13, Building 61, No. 99 Jiangbei Avenue, Jiangbei District, Ningbo City, Zhejiang Province, 315000 Applicant before: Ningbo Otai Gold Stationery Co.,Ltd. |
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