CN111618008B - 3D prints and uses metal silk thread cleaning device - Google Patents
3D prints and uses metal silk thread cleaning device Download PDFInfo
- Publication number
- CN111618008B CN111618008B CN202010487553.XA CN202010487553A CN111618008B CN 111618008 B CN111618008 B CN 111618008B CN 202010487553 A CN202010487553 A CN 202010487553A CN 111618008 B CN111618008 B CN 111618008B
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- scraper
- rod
- scraper blade
- groove
- cleaning device
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- 238000004140 cleaning Methods 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 46
- 230000008602 contraction Effects 0.000 claims abstract description 28
- 238000010146 3D printing Methods 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000007639 printing Methods 0.000 claims abstract description 7
- 238000007790 scraping Methods 0.000 claims description 34
- 238000007664 blowing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/002—Manufacture of articles essentially made from metallic fibres
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
Abstract
The invention discloses a metal wire cleaning device for 3D printing, which comprises a door-shaped frame arranged on the outer side of a feeding device of printing equipment, wherein a threading hole is formed in the surface of the door-shaped frame in a penetrating manner and used for penetrating through a filamentous material; the upper surface of the portal frame is connected with a fixed frame and an elastic contraction rod at two sides of the threading hole, a rotating rod is rotatably arranged in the fixed frame, and the contraction end of the elastic contraction rod is hinged with the bottom of the rotating rod and used for pulling the rotating rod to rotate so that the upper part of the rotating rod moves towards the threading hole; the upper portions of the two rotary rods are respectively hinged with a first scraper and a second scraper, and the first scraper and the second scraper are matched to clamp and scrape the surfaces of the filamentous materials. Has the advantages that: can scrape clearly automatically filiform material surface, clean effectual, avoid filiform material surface to be stained with the foreign matter influence of attaching and print the effect, excellent in use effect.
Description
Technical Field
The invention relates to the technical field of medicine taking devices, in particular to a metal wire cleaning device for 3D printing.
Background
3D printing is typically accomplished using digital technology material printers, which have applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.
The raw materials that 3D printed have liquid material, powder material, flake material and filiform material, and at filiform material's printing in-process, utilize the heater on the shower nozzle to carry out heating fusion to filiform material, filiform material's surface cleanliness factor directly influences 3D and prints the quality, and filiform material rolling makes other foreign matters be stained with on the filiform material surface easily in the rolling and the course of depositing, consequently needs to clean filiform material surface. However, the conventional 3D printing apparatus does not have a cleaning function for the filament material, and foreign substances attached to the surface of the filament material affect the 3D printing effect.
Disclosure of Invention
The present invention is directed to provide a cleaning device for a 3D printing metal wire to solve the above problems, so as to solve the technical problems that the existing 3D printing device in the prior art does not have a cleaning function for a filament material, and foreign matter adhered to the surface of the filament material affects the 3D printing effect. The preferable technical scheme of the technical schemes provided by the invention can automatically scrape and clean the surface of the filamentous material, has good cleaning effect, avoids the influence of foreign matters adhered to the surface of the filamentous material on the printing effect, has good use effect and other technical effects, and is explained in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a metal wire cleaning device for 3D printing, which comprises a door-shaped frame arranged on the outer side of a feeding device of printing equipment, wherein a threading hole is formed in the surface of the door-shaped frame in a penetrating manner and used for penetrating through a filamentous material;
the upper surface of the portal frame is connected with a fixed frame and an elastic contraction rod at two sides of the threading hole, a rotating rod is rotatably arranged in the fixed frame, and the contraction end of the elastic contraction rod is hinged with the bottom of the rotating rod and used for pulling the rotating rod to rotate so that the upper part of the rotating rod moves towards the threading hole;
the upper portions of the two rotary rods are respectively hinged with a first scraper and a second scraper, and the first scraper and the second scraper are matched to clamp and scrape the surfaces of the filamentous materials.
When the cleaning device for the metal silk thread for 3D printing is used, the contraction elastic force of the elastic contraction rod is overcome, the rotary rods rotate in the fixing frame, the upper parts of the two rotary rods respectively drive the first scraper and the second scraper to be far away from the threading holes, the silk thread materials penetrate through the threading holes, the threading holes are located between the first scraper and the second scraper, the rotary rods are driven to rotate in the fixing frame by the contraction elastic force of the elastic contraction rod, the first scraper and the second scraper are respectively driven to move towards the threading holes by the upper parts of the two rotary rods, the first scraper and the second scraper clamp the silk thread materials, the silk thread materials slide in the threading holes under the driving of a feeding device of a 3D printer, and the surfaces of the silk thread materials are scraped clearly by the first scraper and the second scraper, avoid filamentous material surface to be stained with the foreign matter that attaches to influence and print the effect, the whole simple operation of device is convenient, and is effectual to scraping of filamentous material.
Preferably, the first scraper blade surface is provided with a first scraping groove in a penetrating manner, the first scraping groove is of a semicircular structure, the circle center of the first scraper blade is located on the end face of the second scraper blade, the second scraper blade surface is provided with a second scraping groove in a penetrating manner, the second scraping groove is composed of a linear portion and a semicircular portion, the semicircular portion of the second scraping groove is the same as the first scraping groove, the linear portion of the second scraping groove is provided with a penetrating manner, the second scraper blade is close to the side face of the first scraper blade, and the second scraper blade is internally provided with a plugging cavity for inserting the first scraper blade.
Preferably, the first scraper blade is in clearance fit with the insertion cavity.
Preferably, the far away face of first scraper blade with the second scraper blade all is connected with the connecting block, the connecting block surface runs through and is provided with the spread groove, rotary rod upper portion is passed through the connecting axle and is rotated and install inside the spread groove, make the rotary rod is in the inside vertical direction of spread groove is rotatory.
Preferably, the inner wall of the connecting groove is provided with a through hole in a penetrating manner, and two ends of the connecting shaft penetrate through the through hole and are provided with locking nuts through threads.
Preferably, a waist-shaped groove is formed in the bottom of the rotating rod, the contraction end of the elastic contraction rod is connected with a U-shaped frame, a sliding shaft is connected inside the U-shaped frame, and the bottom of the rotating rod extends into the U-shaped frame and penetrates through the waist-shaped groove.
Preferably, the elastic shrinkage rod comprises a vertical plate, the vertical plate is arranged on the upper surface of the door-shaped frame, a horizontal fixed pipe is connected to the side, close to the threading hole, of the vertical plate, the fixed pipe extends towards the threading hole, a guide ring is arranged at the end, far away from the vertical plate, of the fixed pipe, a sliding rod is slidably arranged inside the guide ring, the outer end of the sliding rod is connected with the U-shaped frame, the inner end of the sliding rod extends into the inside of the fixed pipe and is connected with a sliding block, and a compression spring is sleeved on the outer side, located between the guide ring and the sliding block, of the sliding rod.
Preferably, a bearing plate is mounted on the upper surface of the door-shaped frame, and an electric fan is mounted on the upper portion of the bearing plate and used for blowing air to the first scraper blade and the second scraper blade.
Has the advantages that: can scrape clearly automatically filiform material surface, clean effectual, avoid filiform material surface to be stained with the foreign matter influence of attaching and print the effect, excellent in use effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the mounting structure of the first screed and the second screed;
FIG. 3 is a schematic view showing a connection structure of an elastically contractible rod and a rotary rod;
fig. 4 is an enlarged view of the structure of the elastically contractible rod.
The reference numerals are explained below:
1. a gantry frame; 101. threading holes; 2. an elastically contractible rod; 201. a U-shaped frame; 202. a sliding shaft; 203. a vertical plate; 204. a fixed tube; 205. a compression spring; 206. a guide ring; 207. a slide bar; 208. a slider; 3. rotating the rod; 301. a waist-shaped groove; 4. a fixed mount; 5. a first squeegee; 501. a first scraping groove; 6. a second squeegee; 601. an insertion cavity; 602. a second scraping groove; 7. an electric fan; 8. a carrier plate; 9. connecting blocks; 901. connecting grooves; 10. locking the nut; 11. and (7) connecting the shafts.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1 to 4, the invention provides a metal wire cleaning device for 3D printing, which comprises a gantry 1 installed outside a feeding device of a printing device, wherein a threading hole 101 is formed in the surface of the gantry 1 in a penetrating manner and used for passing through a filamentous material;
the upper surface of the portal frame 1 is connected with a fixed frame 4 and an elastic shrinkage rod 2 at two sides of the threading hole 101, the rotating rod 3 is rotatably installed in the fixed frame 4, and the shrinkage end of the elastic shrinkage rod 2 is hinged with the bottom of the rotating rod 3 and used for pulling the rotating rod 3 to rotate so that the upper part of the rotating rod 3 moves towards the threading hole 101;
the upper parts of the two rotating rods 3 are respectively hinged with a first scraper 5 and a second scraper 6, and the first scraper 5 and the second scraper 6 are matched to clamp and scrape the surfaces of filamentous materials.
As an alternative embodiment, a first scraping groove 501 is formed on the surface of the first scraping plate 5 in a penetrating manner, the first scraping groove 501 is in a semicircular structure, the center of the first scraping groove is located on the end surface of the first scraping plate 5 close to the second scraping plate 6, a second scraping groove 602 is formed on the surface of the second scraping plate 6 in a penetrating manner, the second scraping groove 602 is composed of a straight portion and a semicircular portion, the semicircular portion of the second scraping groove 602 is the same as the first scraping groove 501, the straight portion of the second scraping groove 602 penetrates through the side surface of the second scraping plate 6 close to the first scraping plate 5, an insertion cavity 601 for inserting the first scraping plate 5 is formed in the second scraping plate 6, the first scraping plate 5 corresponds to the insertion cavity 601, the rotating rod 3 is driven to rotate by the contraction elastic force of the elastic contraction rod 2, the first scraping plate 5 enters the insertion cavity 601, and the filamentous material is located in the semicircular portions of the first scraping groove 501 and the second scraping groove 602, the first scraper 5 and the second scraper 6 clamp and fix the silk-shaped material.
The face of keeping away from of first scraper blade 5 and second scraper blade 6 all is connected with connecting block 9, connecting block 9 surface runs through and is provided with spread groove 901, and connecting axle 11 is passed through on rotary rod 3 upper portion and is rotated and install inside spread groove 901, makes rotary rod 3 rotatory at the inside vertical direction of spread groove 901, sets up like this and can realize first scraper blade 5 and second scraper blade 6 and rotary rod 3 relative rotation, is convenient for make inside first scraper blade 5 inserts grafting chamber 601.
The connecting groove 901 inner wall runs through and is provided with the through-hole, and 11 both ends of connecting axle run through this through-hole and install lock nut 10 through the screw thread, set up like this, can realize connecting axle 11's dismouting through lock nut 10 to can carry out the dismouting change of first scraper blade 5 and second scraper blade 6 according to filamentous material's size, satisfy the user demand of not unidimensional material.
3 bottoms of rotary rod are provided with waist type groove 301, and the shrink end of elastic contraction pole 2 is connected with U type frame 201, and U type frame 201 internal connection has sliding shaft 202, and 3 bottoms of rotary rod stretch into U type frame 201 inside and sliding shaft 202 run through waist type groove 301, set up like this, and sliding shaft 202 slides in waist type groove 301 is inside, realizes the articulated of elastic contraction pole 2 and rotary rod 3, is convenient for make elastic contraction pole 2 drive rotary rod 3 rotatory.
A bearing plate 8 is arranged on the upper surface of the door-shaped frame 1, an electric fan 7 is arranged on the upper portion of the bearing plate 8 and used for blowing air to the first scraper 5 and the second scraper 6, and foreign matters scraped by the first scraper 5 and the second scraper 6 can be cleaned through the electric fan 7.
By adopting the structure, when in use, the contraction elasticity of the elastic contraction rod 2 is overcome, the rotary rod 3 is enabled to rotate in the fixing frame 4, the upper parts of the two rotary rods 3 respectively drive the first scraper 5 and the second scraper 6 to be far away from the threading hole 101, the filamentary material penetrates through the threading hole 101, the threading hole 101 is positioned between the first scraper 5 and the second scraper 6, the contraction elasticity of the elastic contraction rod 2 is utilized to drive the rotary rod 3 to rotate in the fixing frame 4, the upper parts of the two rotary rods 3 respectively drive the first scraper 5 and the second scraper 6 to move towards the threading hole 101, the first scraper 5 and the second scraper 6 clamp the filamentary material, the filamentary material slides in the threading hole 101 under the driving of the feeding device of the 3D printer, the surface of the filamentary material is scraped clearly through the first scraper 5 and the second scraper 6, and the influence of foreign matters attached to the surface of the filamentary material on the printing effect is avoided, the device is simple and convenient to operate integrally, and has a good scraping effect on the filamentous materials.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The utility model provides a 3D prints and uses metal silk thread cleaning device which characterized in that: the feeding device comprises a door-shaped frame (1) arranged on the outer side of a feeding device of printing equipment, wherein a threading hole (101) is formed in the surface of the door-shaped frame (1) in a penetrating mode and used for penetrating through filamentous materials;
the upper surface of the door-shaped frame (1) is positioned at two sides of the threading hole (101) and is connected with a fixed frame (4) and an elastic contraction rod (2), a rotating rod (3) is rotatably installed in the fixed frame (4), and the contraction end of the elastic contraction rod (2) is hinged with the bottom of the rotating rod (3) and used for pulling the rotating rod (3) to rotate so that the upper part of the rotating rod (3) moves towards the threading hole (101);
the upper parts of the two rotating rods (3) are respectively hinged with a first scraper (5) and a second scraper (6), and the first scraper (5) and the second scraper (6) are matched to clamp and scrape the surface of a silk-shaped material;
first scraper blade (5) surface runs through and is provided with first clear groove (501) of scraping, first clear groove (501) semicircular structure that is, and its centre of a circle is located first scraper blade (5) are close to on the terminal surface of second scraper blade (6), second scraper blade (6) surface runs through and is provided with the second and scrapes clear groove (602), the second is scraped clear groove (602) and is constituted by sharp portion and semicircular portion, the second scrape clear groove (602) semicircular portion with first clear groove (501) of scraping is the same, the second is scraped the sharp portion of clear groove (602) and runs through second scraper blade (6) are close to the side of first scraper blade (5), second scraper blade (6) inside is provided with and is used for inserting the grafting chamber (601) of first scraper blade (5).
2. The cleaning device for the metal wire used for 3D printing according to claim 1, wherein: the first scraper (5) is in clearance fit with the plug-in cavity (601).
3. The cleaning device for the metal wire used for 3D printing according to claim 2, characterized in that: the far away face of first scraper blade (5) with second scraper blade (6) all is connected with connecting block (9), connecting block (9) surface runs through and is provided with spread groove (901), connecting axle (11) rotation is passed through on rotary rod (3) upper portion and is installed inside spread groove (901), makes rotary rod (3) be in spread groove (901) inside vertical direction is rotatory.
4. The 3D printing metal wire cleaning device according to claim 3, wherein: the inner wall of the connecting groove (901) is provided with a through hole in a penetrating mode, and two ends of the connecting shaft (11) penetrate through the through hole and are provided with locking nuts (10) through threads.
5. The metal wire cleaning device for 3D printing according to claim 4, wherein: the utility model discloses a novel elastic telescopic rod, including rotary rod (3), rotary rod (3) bottom is provided with waist type groove (301), the shrink end of elastic telescopic rod (2) is connected with U type frame (201), U type frame (201) internal connection has sliding shaft (202), rotary rod (3) bottom stretches into inside just of U type frame (201) sliding shaft (202) run through waist type groove (301).
6. The cleaning device for the metal wire used for 3D printing according to claim 5, wherein: the elastic contraction rod (2) comprises a vertical plate (203), the vertical plate (203) is installed on the upper surface of the door-shaped frame (1), a horizontal fixing tube (204) is connected to the side face, close to the threading hole (101), of the vertical plate (203), the fixing tube (204) extends towards the threading hole (101), a guide ring (206) is installed at the end portion, far away from the vertical plate (203), of the fixing tube (204), a sliding rod (207) is installed inside the guide ring (206) in a sliding mode, the outer end of the sliding rod (207) is connected with the U-shaped frame (201), the inner end of the sliding rod (207) stretches into the inside of the fixing tube (204) and is connected with a sliding block (208), and a compression spring (205) is sleeved on the outer side, located between the guide ring (206) and the sliding block (208), of the sliding rod (207).
7. The cleaning device for the metal wire used for 3D printing according to claim 6, wherein: the upper surface of the door-shaped frame (1) is provided with a bearing plate (8), and the upper part of the bearing plate (8) is provided with an electric fan (7) for blowing air to the first scraper (5) and the second scraper (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010487553.XA CN111618008B (en) | 2020-06-02 | 2020-06-02 | 3D prints and uses metal silk thread cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010487553.XA CN111618008B (en) | 2020-06-02 | 2020-06-02 | 3D prints and uses metal silk thread cleaning device |
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| Publication Number | Publication Date |
|---|---|
| CN111618008A CN111618008A (en) | 2020-09-04 |
| CN111618008B true CN111618008B (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010487553.XA Active CN111618008B (en) | 2020-06-02 | 2020-06-02 | 3D prints and uses metal silk thread cleaning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114289378B (en) * | 2021-12-21 | 2023-07-21 | 浙江财经大学 | Rhizome class plant afterbody cleaning device |
| CN115071127A (en) * | 2022-06-01 | 2022-09-20 | 苏州大学 | High-precision 3D printing equipment and printing method for viscoelastic paste material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101650240B1 (en) * | 2014-09-05 | 2016-08-30 | 주식회사 엘지화학 | System and method for manufacturing 3D film |
| CN104671032B (en) * | 2015-02-12 | 2017-06-13 | 铁法煤业（集团）有限责任公司晓南矿 | Steel wire rope greasy filth cleaning plant |
| CN206485039U (en) * | 2017-01-03 | 2017-09-12 | 湖州东立丝绸有限公司 | A kind of silk stereo printed article equipment |
| CN108313667A (en) * | 2018-03-05 | 2018-07-24 | 马钢(集团)控股有限公司 | A kind of scraper plate can online quick change belt cleaning device |
| CN208098926U (en) * | 2018-04-23 | 2018-11-16 | 江苏巨力钢绳有限公司 | A kind of cleaning plant of wirerope surface drawing dust |
| CN108437468B (en) * | 2018-05-04 | 2021-06-01 | 芜湖文青机械设备设计有限公司 | A adjustable thread feeding mechanism of tensile force for 3D printer |
| CN208787007U (en) * | 2018-06-04 | 2019-04-26 | 绍兴特斯林网业有限公司 | It is a kind of to wash equipment for winding machine |
| CN208589711U (en) * | 2018-07-06 | 2019-03-08 | 国网河北省电力有限公司灵寿县供电分公司 | A kind of power circuit foreign matter remove device |
| CN109454872A (en) * | 2018-12-11 | 2019-03-12 | 龙岩学院 | A kind of 3D printer wire feeder |
| CN110918982A (en) * | 2019-12-17 | 2020-03-27 | 安徽科元三维技术有限公司 | Raw material pushing device for 3D metal printer |
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Effective date of registration: 20240723 Address after: 197 Huanghe West Road, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Changzhou Maixin Printing Co.,Ltd. Country or region after: China Address before: 064200 Longhua Mingyuan community, Tangshan City, Hebei Province Patentee before: Li Bo Country or region before: China |
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