CN114559587B - Double-waterway plastic particle extrusion device - Google Patents
Double-waterway plastic particle extrusion device Download PDFInfo
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- CN114559587B CN114559587B CN202210147650.3A CN202210147650A CN114559587B CN 114559587 B CN114559587 B CN 114559587B CN 202210147650 A CN202210147650 A CN 202210147650A CN 114559587 B CN114559587 B CN 114559587B
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- water supply
- cooling
- cooling cylinder
- circulation port
- fixedly arranged
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
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- 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
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides a double-waterway plastic particle extrusion device, and relates to the field of plastics. This two water route plastic granules extrusion device, including supporting mechanism, supporting mechanism's top both sides fixed mounting has water supply mechanism, rotates between two water supply mechanisms and is connected with the cooling forming mechanism, and the top of cooling forming mechanism is provided with the extrusion head, supporting mechanism includes the backup pad that two symmetries set up, through collecting fill fixed connection between two backup pads, has seted up the discharge gate below the front end of collecting the fill, and the middle part fixed mounting who collects the fill has the scraper blade, water supply mechanism includes the water supply end cover. This two water route plastic granules extrusion device can be above through the rotation of cooling cylinder with the extrusion head contact injection plastics in bearing groove and at rotatory in-process through the water between cooling cylinder and the interior cooling jacket cool off plastics to fashioned plastic granules discharges when rotatory to the lower extreme, has reduced the space and has taken up, thereby can realize the granulation in limited space.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a double-waterway plastic particle extrusion device.
Background
The plastic is a high molecular compound polymerized by polyaddition or polycondensation reaction with monomer as raw material, and its deformation resistance is intermediate between fiber and rubber, and is composed of synthetic resin and additive such as filler, plasticizer, stabilizer, lubricant, pigment, etc. The main component of the plastic is resin.
The existing plastic particles need to drag and cool extruded plastic in a longer cooling pool in the production process and then break the extruded plastic into particles through a crusher, so that the occupied area of the production device is large, and meanwhile, the consumption of cooling water is large, so that a new device is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a double-waterway plastic particle extrusion device, which solves the problems in the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a double waterway plastic granules extrusion device, includes supporting mechanism, supporting mechanism's top both sides fixed mounting has water supply mechanism, rotates between two water supply mechanisms and is connected with cooling forming mechanism, and cooling forming mechanism's top is provided with the extrusion head, supporting mechanism includes two backup pads that the symmetry set up, through collecting bucket fixed connection between two backup pads, has seted up the discharge gate below the front end of collecting bucket, and collecting bucket's middle part fixed mounting has the scraper blade, water supply mechanism includes the water supply end cover, water supply end cover fixed mounting in the top of backup pad, and the inner fixed mounting of one of them water supply end cover has two magnetism opposite magnetic plates, and outer circulation mouth has been seted up to water supply end cover's outer lane below, and inner circulation mouth has been seted up to water supply end cover's inner circle, cooling forming mechanism includes the cooling cylinder, and the cooling cylinder rotates to be connected between two water supply end covers, the outer surface of the cooling cylinder is provided with a bearing groove, the inside of the bearing groove is connected with a gasket in a sliding way, the bottom end of the gasket is fixedly provided with a jacking pipe, the jacking pipe extends to the inside of the cooling cylinder, the inside of the cooling cylinder is fixedly provided with an inner cooling sleeve, the inner cooling sleeve is fixedly connected with the cooling cylinder through a convex block, the inner cooling sleeve is positioned between an outer circulation port and an inner circulation port, one end of the jacking pipe positioned in the cooling cylinder penetrates through the inner cooling sleeve and extends to the inside of the inner cooling sleeve, one end of the jacking pipe positioned in an inner ring of the inner cooling sleeve is fixedly provided with a magnetic sheet, one end of the inside of the inner cooling sleeve is fixedly provided with a connecting frame, the connecting frame is positioned between a magnetic plate and a water supply end cover, the middle part of the connecting frame is fixedly provided with a rotating shaft, the rotating shaft penetrates through the water supply end cover and extends to the outer side of the water supply end cover, the extrusion sleeve is connected above the outer surface of the cooling cylinder, the bottom center of the extrusion head is provided with a feed port matched with the bearing groove.
Preferably, the cross section of the outer circulation port is in a U-shaped annular groove shape, the cross section of the inner circulation port is in a fan shape, and the outer circulation port and the inner circulation port are concentric.
Preferably, the collecting hopper is low in front and high in back, and the scraping plate is positioned right below the cooling cylinder and is in contact with the cooling cylinder.
Preferably, the shape of the magnetic plate is semi-annular, the magnetism of the magnetic plate positioned below is the same as that of the magnetic sheet, and the included angle between the two magnetic plates is one hundred eighty degrees.
Preferably, the outer surface of the cooling cylinder is provided with annular grooves between the bearing grooves, the bottom end of the extrusion head is fixedly provided with convex edges at two sides of the feed inlet, and the convex edges are sleeved in the annular grooves.
Preferably, the middle part of the bottom end of the scraping plate is provided with a through hole, the length of the collecting hopper is larger than that of the cooling cylinder, and the length of the scraping plate is equal to that of the cooling cylinder.
The invention has the following beneficial effects:
1. this two water route plastic granules extrusion device can be above through the rotation of cooling cylinder with the extrusion head contact injection plastics in bearing groove and at rotatory in-process through the water between cooling cylinder and the interior cooling jacket cool off plastics to fashioned plastic granules discharges when rotatory to the lower extreme, has reduced the space and has taken up, thereby can realize the granulation in limited space.
2. This two water route plastic granules extrusion device lets in faster water of circulation in the outer circulation mouth and lets in slower water of circulation in the outer circulation mouth and cool off plastic granules to cool off the exhaust granule through the water of inner circulation mouth circulation, thereby can reduce the required water of cooling.
3. This two water route plastic granules extrusion device makes the plastic granules bear the weight of the inslot and discharges through the promotion of magnetic plate to the magnetic sheet when rotatory to the lower extreme, can adsorb the magnetic sheet through the magnetic plate of top and move to the inboard to can realize discharging and reset.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a support mechanism according to the present invention;
FIG. 3 is a schematic view of a water supply mechanism according to the present invention;
FIG. 4 is a schematic view of a cooling forming mechanism according to the present invention;
FIG. 5 is a schematic cross-sectional view of a cooling forming mechanism according to the present invention;
fig. 6 is a schematic view of a extrusion head according to the present invention.
The device comprises a supporting mechanism-1, a water supply mechanism-2, a cooling forming mechanism-3, an extrusion head-4, a supporting plate-101, a collecting hopper-102, a discharge hole-103, a scraping plate-104, a through hole-105, a water supply end cover-201, a magnetic plate-202, an outer circulation port-203, an inner circulation port-204, a cooling cylinder-301, a bearing groove-302, a gasket-303, a jacking pipe-304, a ring groove-305, an inner cooling sleeve-306, a bump-307, a connecting frame-308, a rotating shaft-309, a magnetic sheet-310, a feed port-401 and a convex rib-402.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a double-waterway plastic particle extrusion device, which comprises:
1-6, including supporting mechanism 1, water supply mechanism 2 is fixed on both sides above supporting mechanism 1, cooling forming mechanism 3 is connected between two water supply mechanisms 2, extrusion head 4 is arranged above cooling forming mechanism 3, supporting mechanism 1 includes two symmetrically arranged supporting plates 101, two supporting plates 101 are fixedly connected through collecting hopper 102, discharge port 103 is arranged below front end of collecting hopper 102, water collecting tank is fixed on bottom end of collecting hopper 102, small through hole is arranged on surface of collecting hopper 102, scraper 104 is fixed on middle part of collecting hopper 102, water supply mechanism 2 includes water supply end cover 201, water supply end cover 201 is fixed on upper part of supporting plate 101, two magnetic plates 202 with opposite magnetism are fixed on inner end of one water supply end cover 201, an outer circulation port 203 is formed below the outer ring of the water supply end cover 201, an inner circulation port 204 is formed in the inner ring of the water supply end cover 201, the outer circulation port 203 is connected with new cooling water, the inner circulation port 204 is connected with a waterway of the collecting bucket 102 and is connected with new cold cutting water after being communicated, the cross section of the outer circulation port 203 is in a U-shaped annular groove shape, the cross section of the inner circulation port 204 is fan-shaped, the outer circulation port 203 and the inner circulation port 204 are concentric, water with the water level being flush with the upper plane can be always injected into the outer circulation port 203 to cool the bearing groove 302 through the arrangement, water is injected into the inner circulation port 204, waterway circulation of the outer circulation port 203 is not synchronous, and water circulation in the outer circulation port 203 is faster than that in the inner circulation port 204.
The cooling forming mechanism 3 comprises a cooling cylinder 301, the cooling cylinder 301 is rotationally connected between the two water supply end covers 201, the front part of the collecting hopper 102 is low, the rear part of the collecting hopper is high, discharged plastic particles can be discharged outwards automatically through the arrangement, the scraping plate 104 is located under the cooling cylinder 301 and is in contact with the cooling cylinder 301, and the scraping plate 104 is attached to the cooling cylinder 301 to scrape the plastic particles.
Through-hole 105 has been seted up at the bottom middle part of scraper blade 104, and the length of collecting hopper 102 is greater than the length of cooling cylinder 301, and the length of scraper blade 104 equals the length of cooling cylinder 301, can continue to cool off the granule through the water that lets in the inner loop mouth 204 exhaust in collecting hopper 102 through this setting.
The bearing groove 302 is formed in the outer surface of the cooling cylinder 301, the gasket 303 is connected to the inner portion of the bearing groove 302 in a sliding mode, the top pipe 304 is fixedly arranged at the bottom end of the gasket 303, the top pipe 304 extends to the inner portion of the cooling cylinder 301, the inner cooling sleeve 306 is fixedly arranged in the cooling cylinder 301, the inner cooling sleeve 306 is fixedly connected with the cooling cylinder 301 through the protruding block 307, the inner cooling sleeve 306 is located between the outer circulation port 203 and the inner circulation port 204, one end of the top pipe 304 located in the cooling cylinder 301 penetrates through the inner cooling sleeve 306 and extends into the inner cooling sleeve 306, the magnetic sheet 310 is fixedly arranged at one end of the inner ring of the top pipe 304, the magnetic plate 202 is semi-annular, the magnetism of the magnetic plate 202 located below is identical to that of the magnetic sheet 310, an included angle between the two magnetic plates 202 is one hundred eighty degrees, and the magnetic sheets 310 can be extruded and sucked back at different positions through the arrangement.
A connecting frame 308 is fixedly arranged at one end of the inner part of the inner cooling jacket 306, the connecting frame 308 is positioned between the magnetic plate 202 and the water supply end cover 201, a rotating shaft 309 is fixedly arranged in the middle of the connecting frame 308, the rotating shaft 309 penetrates through the water supply end cover 201 and extends to the outer side of the water supply end cover 201, the extrusion head 4 is sleeved above the outer surface of the cooling cylinder 301, and a feed port 401 matched with the bearing groove 302 is formed in the center of the bottom end of the extrusion head 4. The surface of cooling cylinder 301 is located and has seted up annular 305 between the loading groove 302, and the bottom of extrusion head 4 is located the both sides fixed mounting bead 402 of feed inlet 401, and bead 402 cup joints in the inside of annular 305, can guarantee the laminating of cooling cylinder 301 and extrusion head 4 through this kind of setting, through can making forming the fold between cooling cylinder 301 and the interior cooling jacket 306 and then can improving the cooling water dwell time.
When the cooling molding device is used, the extrusion head 4 is communicated with an existing extruder, the cooling molding mechanism 3 is arranged below the extrusion head 4, plastic can be injected into the bearing groove 302 by contacting the extrusion head 4 at the upper part through the rotation of the cooling cylinder 301, the plastic can be cooled through water between the cooling cylinder 301 and the inner cooling sleeve 306 in the rotating process, the plastic particles are discharged from the bearing groove 302 through the pushing of the magnetic sheet 310 by the magnetic plate 202 when the cooling cylinder rotates to the lowest end, molded plastic particles are discharged through the scraping plate, and therefore granulation can be realized in a limited space, meanwhile, the plastic particles are cooled through the water which circulates faster in the outer circulation opening 203 and the water which circulates slower in the outer circulation opening 203, the discharged particles are cooled through the water which circulates in the inner circulation opening, so that water required for cooling can be reduced, the outer circulation water can be directly cooled on the bearing groove 302, the outer circulation water can be assisted in cooling, and the magnetic sheet 310 can be adsorbed and moved to the magnetic sheet 310 through the upper side after the cooling cylinder 301 rotates to the scraping plate 104.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a two water route plastic granules extrusion device, includes supporting mechanism (1), its characterized in that: the two sides above the supporting mechanism (1) are fixedly provided with water supply mechanisms (2), a cooling forming mechanism (3) is rotationally connected between the two water supply mechanisms (2), and an extrusion head (4) is arranged above the cooling forming mechanism (3);
the supporting mechanism (1) comprises two symmetrically arranged supporting plates (101), the two supporting plates (101) are fixedly connected through a collecting hopper (102), a discharging hole (103) is formed below the front end of the collecting hopper (102), and a scraping plate (104) is fixedly arranged in the middle of the collecting hopper (102);
the water supply mechanism (2) comprises water supply end covers (201), wherein the water supply end covers (201) are fixedly arranged above the supporting plate (101), two magnetic plates (202) with opposite magnetism are fixedly arranged at the inner end of one water supply end cover (201), an outer circulation port (203) is formed below the outer ring of the water supply end cover (201), and an inner circulation port (204) is formed in the inner ring of the water supply end cover (201);
the cooling forming mechanism (3) comprises a cooling cylinder (301), the cooling cylinder (301) is rotationally connected between two water supply end covers (201), a bearing groove (302) is formed in the outer surface of the cooling cylinder (301), a gasket (303) is slidingly connected in the bearing groove (302), a top pipe (304) is fixedly arranged at the bottom end of the gasket (303), the top pipe (304) extends to the inside of the cooling cylinder (301), an inner cooling sleeve (306) is fixedly arranged in the cooling cylinder (301), the inner cooling sleeve (306) is fixedly connected with the cooling cylinder (301) through a bump (307), the inner cooling sleeve (306) is positioned between an outer circulation port (203) and an inner circulation port (204), one end of the top pipe (304) positioned in the cooling cylinder (301) penetrates through the inner cooling sleeve (306) and extends into the inner cooling sleeve (306), a magnetic sheet (310) is fixedly arranged at one end of the inner ring (306), a connecting frame (308) is fixedly arranged at one end of the inner cooling sleeve (306), a rotating shaft (308) is fixedly arranged between a magnetic plate (202) and the water supply end cover (201), the rotary shaft (309) penetrates the water supply end cover (201) and extends to the outer side of the water supply end cover (201);
the extrusion head (4) is sleeved above the outer surface of the cooling cylinder (301), and a feed port (401) matched with the bearing groove (302) is formed in the center of the bottom end of the extrusion head (4).
2. A dual waterway plastic pellet extrusion apparatus as defined in claim 1, wherein: the cross section of the outer circulation port (203) is in a U-shaped annular groove shape, the cross section of the inner circulation port (204) is in a fan shape, and the outer circulation port (203) and the inner circulation port (204) are concentric.
3. A dual waterway plastic pellet extrusion apparatus as defined in claim 1, wherein: the collecting hopper (102) is low in front and high in back, and the scraping plate (104) is positioned right below the cooling cylinder (301) and is in contact with the cooling cylinder (301).
4. A dual waterway plastic pellet extrusion apparatus as defined in claim 1, wherein: the shape of the magnetic plate (202) is semi-annular, the magnetism of the magnetic plate (202) positioned below is the same as that of the magnetic sheet (310), and an included angle between the two magnetic plates (202) is one hundred eighty degrees.
5. A dual waterway plastic pellet extrusion apparatus as defined in claim 1, wherein: an annular groove (305) is formed in the position, between the bearing grooves (302), of the outer surface of the cooling cylinder (301), ribs (402) are fixedly arranged on the two sides of the bottom end of the extrusion head (4) located at the feed inlet (401), and the ribs (402) are sleeved in the annular groove (305).
6. A dual waterway plastic pellet extrusion apparatus as defined in claim 1, wherein: through holes (105) are formed in the middle of the bottom end of the scraping plate (104), the length of the collecting hopper (102) is larger than that of the cooling cylinder (301), and the length of the scraping plate (104) is equal to that of the cooling cylinder (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147650.3A CN114559587B (en) | 2022-02-17 | 2022-02-17 | Double-waterway plastic particle extrusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147650.3A CN114559587B (en) | 2022-02-17 | 2022-02-17 | Double-waterway plastic particle extrusion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114559587A CN114559587A (en) | 2022-05-31 |
| CN114559587B true CN114559587B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210147650.3A Active CN114559587B (en) | 2022-02-17 | 2022-02-17 | Double-waterway plastic particle extrusion device |
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| Country | Link |
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| CN (1) | CN114559587B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19755578A1 (en) * | 1997-12-15 | 1999-06-24 | E 3 D Vermarktungs Gmbh | Manufacture of reacted, particulate and/or powder binder particles of two component plastic |
| CN201833497U (en) * | 2010-10-27 | 2011-05-18 | 王生成 | Waste plastic granulating device |
| CN107127918A (en) * | 2016-09-24 | 2017-09-05 | 苏州高新区鼎正精密机电有限公司 | A kind of plasticity machines heater with quick cooling function |
| CN214294041U (en) * | 2021-01-04 | 2021-09-28 | 上海乐封实业有限公司 | Cooling device is used in production of plastics strip of paper used for sealing |
| CN215511926U (en) * | 2021-05-31 | 2022-01-14 | 安庆巨元高分子材料科技有限公司 | Circulating water cooling device in polyamide resin granulation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2019939B1 (en) * | 2017-11-20 | 2019-05-24 | Vmi Holland Bv | Cooling apparatus and method for cooling a continuous strip |
-
2022
- 2022-02-17 CN CN202210147650.3A patent/CN114559587B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19755578A1 (en) * | 1997-12-15 | 1999-06-24 | E 3 D Vermarktungs Gmbh | Manufacture of reacted, particulate and/or powder binder particles of two component plastic |
| CN201833497U (en) * | 2010-10-27 | 2011-05-18 | 王生成 | Waste plastic granulating device |
| CN107127918A (en) * | 2016-09-24 | 2017-09-05 | 苏州高新区鼎正精密机电有限公司 | A kind of plasticity machines heater with quick cooling function |
| CN214294041U (en) * | 2021-01-04 | 2021-09-28 | 上海乐封实业有限公司 | Cooling device is used in production of plastics strip of paper used for sealing |
| CN215511926U (en) * | 2021-05-31 | 2022-01-14 | 安庆巨元高分子材料科技有限公司 | Circulating water cooling device in polyamide resin granulation |
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| CN114559587A (en) | 2022-05-31 |
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Effective date of registration: 20230801 Address after: No. 03, Block B, Liyuan Second Road, Nanzhuang Jili Industrial Park, Chancheng District, Foshan City, Guangdong Province, 528000 (Domicile application) Applicant after: Foshan Zhongli New Material Technology Co.,Ltd. Address before: 518100 phase II of Tian'an Yungu Industrial Park, Gangtou community, Bantian street, Longgang District, Shenzhen City, Guangdong Province Applicant before: Liu Wei |
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