CN106838508A - Plastics pipe connecting structure and its processing method - Google Patents
Plastics pipe connecting structure and its processing method Download PDFInfo
- Publication number
- CN106838508A CN106838508A CN201611227324.4A CN201611227324A CN106838508A CN 106838508 A CN106838508 A CN 106838508A CN 201611227324 A CN201611227324 A CN 201611227324A CN 106838508 A CN106838508 A CN 106838508A
- Authority
- CN
- China
- Prior art keywords
- plastic tube
- flange
- pipe
- mouth
- mould
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/06—Severing by using heat
- B26F3/08—Severing by using heat with heated members
-
- 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/561—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using screw-threads being integral at least to one of the parts to be joined
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention belongs to pipe interconnection technique field, the processing method for disclosing a kind of plastics pipe connecting structure and structure, including the first plastic tube and the second plastic tube, the mouth of pipe outer of the first plastic tube is provided with first flange vertical with the first plastic tube axis, and second flange vertical with the second plastic tube axis is all provided with the mouth of pipe outer of the second plastic tube；The processing method is comprised the following steps：Fix the first plastic tube, probe fluting, flange, fix the second plastic tube, flange, polishing, tapping female bore.Compared to the prior art, the program increased inner race section in the mouth of pipe, and the gap of the mouth of pipe is blocked, while the setting of the conical surface increased the fitting area of inner race section and the second plastic pipe inner wall, sealing effectiveness is more preferable；Inner race section also acts as certain inside supporting role simultaneously, prevents mutual bending between the first plastic tube and the second plastic tube, improves the intensity and reliability of connection.
Description
Technical field
The invention belongs to pipe interconnection technique field.
Background technology
Pipe is the main member for constituting pipeline, and pipe has steel pipe, cast iron pipe, concrete reinforced pipe, nonmetallic by material
Pipe is several.Plastic tube is usually that, with synthetic resin, that is, polyester is raw material, adds stabilizer, lubricant, plasticizer etc.,
Formed through extrusion process in tuber in the method for " modeling ".There is light weight, corrosion-resistant, good appearance due to it, without bad gas
The features such as taste, handling ease, easy construction, all increasingly it is widely applied in numerous areas.It is mainly used as house
The tap water supply system pipe arrangement of building, draining, exhaust and blowdown sanitary pipe, subsoil drain system, rain pipe and electric wire
Matched penetration pipe etc. is installed.
To adapt to the use in different operating field, plastic tube is often cut into different length according to the actual requirements, and
The connection and sealing of plastic tube are carried out as needed, and the connecting mode of existing plastic tube is typically used and is similar to flange connection
Mode, i.e., respectively install an anchor ear in the mouth of pipe, connects two anchor ears using bolt after mouth of pipe docking and fastens, and realizes the company of plastic tube
Connect.But, it is not connected with each other between the connected mode plastic tube mouth of pipe, in plastic tube bending or vibrations, mouth of pipe meeting
There is larger gap, influence the reliability and sealing of junction.
The content of the invention
The invention is intended to provide a kind of plastics pipe connecting structure, to improve the reliability and sealing of plastic tube connection.
Plastics pipe connecting structure in this programme, including the first plastic tube and the second plastic tube, first plastic tube
Mouth of pipe outer is provided with first flange vertical with the first plastic tube axis, be equipped with the mouth of pipe outer of second plastic tube with
The second vertical flange of second plastic tube axis；Along the inner race section being provided with diameter parallel in the mouth of pipe of first plastic tube,
The outer surface of the inner race section is taper surface, in the internal wall of pipe orifice of second plastic tube is provided with and be engaged with the taper surface
Circular conical surface；The inner race section of first plastic tube is inserted in the second plastic tube, and the first flange and the second flange are in contact, and first turns over
Side and the second flange are bolted.
Installation process：The inner race section of the first plastic tube is inserted in the mouth of pipe of the second plastic tube, makes the conical surface of inner race section appearance
The internal wall of pipe orifice conical surface with the second plastic tube fits, until the first flange and the second flange are in contact, now inner race section can be sent out
The trickle bending deformation of life, to increase the adhesive force of two conical surfaces；The first flange and the second flange are connected and fastened using bolt.
Beneficial effect：Compared to the prior art, the program increased inner race section in the mouth of pipe, and the gap of the mouth of pipe is hidden
Gear, while the setting of the conical surface increased the fitting area of inner race section and the second plastic pipe inner wall, sealing effectiveness is more preferable；While inner sleeve
Portion also acts as certain inside supporting role, prevents mutual bending between the first plastic tube and the second plastic tube, improves connection
Intensity and reliability.
Further, the axis angle of the taper surface of the inner race section and the first plastic tube is 15 DEG C, the inner sleeve under the angle
The fitting area of portion and the second plastic pipe inner wall is enough big, while inner race section will not also make intensity decreases because of excessively thin, it is comprehensive
Can be most strong.
Further, the thickness of first flange is the 1/2 of the first plastic tube wall thickness, the thickness of second flange
It is the 1/2 of the second plastic tube wall thickness.Ensure the balance of the first flange and inner race section thickness, while ensureing the first flange and interior
The intensity in set portion.
The present invention also provides a kind of processing method of plastics pipe connecting structure, high with the reliability and sealing of realizing connection
Plastics pipe connecting structure processing.
Processing method in this programme is comprised the following steps：
S1. the first plastic tube is fixed：First plastic tube is fixed on fixture, the first plastic tube one end mouth of pipe to be processed stretches out
Fixture；
S2. probe is slotted：A slidable slide is arranged on the first plastic tube mouth of pipe axial direction, if being installed on slide
The dry probe for being circumferentially distributed and radially sliding；Probe is heated, moving sliding base, by probe along the first plastic tube wall end
Insertion, fusing plastics form melting hole；Probe is rotated, and cuts plastic tube, and processing groove, processing groove are made in the first plastics tube end
Plastics tube end is divided into inner cylinder and outer barrel；
S3. flange：The first mould for flange is arranged along the axis direction of the first plastic tube, the first mould is cone, the
One mould is provided with through hole, and the inner cylinder outer end of the first plastic tube is enclosed within outside through hole, and the first mould axial movement, conical surface promotion is outer
Cylinder deformation, is made the first flange；
S4. the second plastic tube is fixed：Second plastic tube is fixed on fixture, the second plastic tube one end mouth of pipe to be processed stretches out
Fixture；
S5. flange：The second mould for flange is arranged along the axis direction of the second plastic tube, the second mould is cone, will
Second mould is machined to high temperature, and the second mould axial movement, conical surface promotes tube wall deformation, is made the second flange；
S6. polish：It is in the conical surface using the interior tube outer surface of grinding machine the first plastic tube of polishing, is made inner race section；Polished using grinding machine
The internal wall of pipe orifice of the second plastic tube is to the conical surface；
S7. tapping female bore：Screwed hole is stormed and captured on the first flange and the second flange.
Beneficial effect：This programme utilizes the prefabricated processing groove of pyrometric probe, while heating and softening the first plastic tube, is easy to turn over
Side；Using conical first mould with through hole, i.e., plastic tube inner cylinder will not be impacted, while the bending for completing outer barrel becomes
Shape, is made the first flange；Second plastic tube is then directly heated using the second mould, and nozzle distortion is promoted by the second mould,
Form the second flange；Above-mentioned processing method can realize the preprocessing of the attachment structure pipe fitting, and the first plastics are carried out using probe
The cutting of pipe processing groove, it is ensured that the thermally equivalent of plastics, it is to avoid plastics soften uneven, influence because of local heating's inequality
Flange.
Brief description of the drawings
Fig. 1 is the structural representation of plastics pipe connecting structure embodiment in the present invention；
Fig. 2 is the first plastic tube and the second plastic tube structural representation to be installed in Fig. 1.
Specific embodiment
Below by specific embodiment, the present invention is further detailed explanation：
Reference in Figure of description includes：First plastic tube 1, the first flange 11, inner race section 12, the second plastic tube 2,
Two flange 21, bolt 3.
Embodiment is substantially as shown in Figures 1 and 2：
Plastics pipe connecting structure in this programme, including the first plastic tube 1 and the second plastic tube 2, the pipe of first plastic tube 1
Mouthful outer is machined with first flange 11 vertical with the axis of the first plastic tube 1, be all provided with the mouth of pipe outer of the second plastic tube 2 with
The second vertical flange 21 of the axis of second plastic tube 2；Along the inner race section being machined with diameter parallel in the mouth of pipe of the first plastic tube 1
12, the outer surface of the inner race section 12 is taper surface, and the internal wall of pipe orifice of the second plastic tube 2 is machined with and is engaged with the taper surface
Internal conical surface.
The inner race section 12 of the first plastic tube 1 is inserted in the second plastic tube 2, and the first flange 11 and the second flange 21 are in contact,
Connected by bolt 3 on first flange 11 and the second flange 21.The axis angle of the taper surface of inner race section 12 and the first plastic tube 1
It it is 15 DEG C, the fitting area of the inwall of 12 and second plastic tube of inner race section 2 is enough big under the angle, while inner race section 12 also will not be because
Make intensity decreases for excessively thin, combination property is most strong.The thickness of the first flange 11 is the 1/2 of the pipe thickness of the first plastic tube 1, institute
The thickness for stating the second flange 21 is the 1/2 of the pipe thickness of the second plastic tube 2.Ensure the flat of the first flange 11 and the thickness of inner race section 12
Weighing apparatus, while ensureing the intensity of the first flange 11 and inner race section 12.Hole is all threaded on first flange 11 and the second flange 21,
Screwed hole is provided with bolt 3 and is fastened.
Installation process：The inner race section 12 of the first plastic tube 1 is inserted in the mouth of pipe of the second plastic tube 2, makes the appearance of inner race section 12
The conical surface and the internal wall of pipe orifice conical surface of the second plastic tube 2 fit, until the first flange 11 and the second flange 21 are in contact, now
Inner race section 12 can occur trickle bending deformation, to increase the adhesive force of two conical surfaces；First flange 11 and second are turned over using bolt 3
Side 21 connects and fastens.
The plastic tube that above-mentioned attachment structure is used is processed in the following ways：
S1. the first plastic tube 1 is fixed：First plastic tube 1 is fixed on fixture, the first plastic tube 1 one end mouth of pipe to be processed
Stretch out fixture；
S2. probe is slotted：A slidable slide is arranged on 1 mouthful of axial direction of the first plastic tube, if being installed on slide
The dry probe for being circumferentially distributed and radially sliding；Probe is heated, moving sliding base, by probe along the tube wall end of the first plastic tube 1
Portion inserts, and fusing plastics form melting hole；The probe integral-rotation of circle distribution, cuts plastics, in the end system of the first plastic tube 1
Into processing groove, the inner side and outer side of processing groove is respectively inner cylinder and outer barrel；
S3. flange：The first mould for flange is arranged along the axis direction of the first plastic tube 1, the first mould is cone, the
One mould is provided with through hole, and the inner cylinder outer end of the first plastic tube 1 is enclosed within outside through hole, and the first mould axial movement, conical surface is promoted
Outer barrel deforms, and is made the first flange 11；
S4. the second plastic tube 2 is fixed：Second plastic tube 2 is fixed on fixture, the second plastic tube 2 one end mouth of pipe to be processed
Stretch out fixture；
S5. flange：The second mould for flange is arranged along the axis direction of the second plastic tube 2, the second mould is cone, will
Second mould is machined to high temperature, and the second mould axial movement, conical surface promotes tube wall deformation, is made the second flange 21；
S6. polish：Using the interior tube outer surface of grinding machine the first plastic tube 1 of polishing to the conical surface, inner race section 12 is made；Beaten using grinding machine
Grind the internal wall of pipe orifice of the second plastic tube 2 to the conical surface；
S7. tapping female bore：Screwed hole is stormed and captured on the first flange 11 and the second flange 21.
Above-described is only embodiments of the invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme
Excessive description.It should be pointed out that for a person skilled in the art, on the premise of structure of the present invention is not departed from, can be with
Some deformations and improvement are made, these should also be considered as protection scope of the present invention, these are implemented all without the influence present invention
Effect and practical applicability.This application claims protection domain should be defined by the content of its claim, in specification
Specific embodiment etc. records the content that can be used for explaining claim.
Claims (4)
1. a kind of plastics pipe connecting structure, including the first plastic tube and the second plastic tube, it is characterised in that：First plastic tube
Mouth of pipe outer be provided with first flange vertical with the first plastic tube axis, be equipped with the mouth of pipe outer of second plastic tube
Second flange vertical with the second plastic tube axis；Along the inner sleeve being provided with diameter parallel in the mouth of pipe of first plastic tube
Portion, the outer surface of the inner race section is taper surface, and the internal wall of pipe orifice of second plastic tube is provided with and is engaged with the taper surface
Internal conical surface；The inner race section of first plastic tube is inserted in the second plastic tube, and the first flange and the second flange are in contact, the
One flange and the second flange are bolted.
2. plastics pipe connecting structure according to claim 1, it is characterised in that：The taper surface of the inner race section and the first modeling
The axis angle of expects pipe is 15 DEG C.
3. plastics pipe connecting structure according to claim 2, it is characterised in that：The thickness of first flange is the first modeling
The 1/2 of expects pipe pipe thickness, the thickness of second flange is the 1/2 of the second plastic tube wall thickness.
4. a kind of processing method of plastics pipe connecting structure as claimed in claim 1, it is characterised in that comprise the following steps：
S1. the first plastic tube is fixed：First plastic tube is fixed on fixture, the first plastic tube one end mouth of pipe to be processed stretches out
Fixture；
S2. probe is slotted：A slidable slide is arranged on the first plastic tube mouth of pipe axial direction, if being installed on slide
The dry probe for being circumferentially distributed and radially sliding；Probe is heated, moving sliding base, by probe along the first plastic tube wall end
Insertion, fusing plastics form melting hole；Probe is rotated, and cuts plastic tube, and processing groove, processing groove are made in the first plastics tube end
Plastics tube end is divided into inner cylinder and outer barrel；
S3. flange：The first mould for flange is arranged along the axis direction of the first plastic tube, the first mould is cone, the
One mould is provided with through hole, and the inner cylinder outer end of the first plastic tube is enclosed within outside through hole, and the first mould axial movement, conical surface promotion is outer
Cylinder deformation, is made the first flange；
S4. the second plastic tube is fixed：Second plastic tube is fixed on fixture, the second plastic tube one end mouth of pipe to be processed stretches out
Fixture；
S5. flange：The second mould for flange is arranged along the axis direction of the second plastic tube, the second mould is cone, will
Second mould is machined to high temperature, and the second mould axial movement, conical surface promotes tube wall deformation, is made the second flange；
S6. polish：It is in the conical surface using the interior tube outer surface of grinding machine the first plastic tube of polishing, is made inner race section；Polished using grinding machine
The internal wall of pipe orifice of the second plastic tube is to the conical surface；
S7. tapping female bore：Screwed hole is stormed and captured on the first flange and the second flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227324.4A CN106838508B (en) | 2016-12-27 | 2016-12-27 | Plastics pipe connecting structure and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227324.4A CN106838508B (en) | 2016-12-27 | 2016-12-27 | Plastics pipe connecting structure and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106838508A true CN106838508A (en) | 2017-06-13 |
| CN106838508B CN106838508B (en) | 2018-11-06 |
Family
ID=59135625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611227324.4A Active CN106838508B (en) | 2016-12-27 | 2016-12-27 | Plastics pipe connecting structure and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106838508B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518913A (en) * | 2018-12-29 | 2019-03-26 | 佛山市南海保达建筑机械设备有限公司 | A kind of truncated cone-shaped floor garbage shaft |
| CN110468937A (en) * | 2019-08-23 | 2019-11-19 | 广东祥实建设有限公司 | A kind of hydraulic engineering drainage pipeline convenient for Rapid Combination installation |
| CN110735976A (en) * | 2019-10-30 | 2020-01-31 | 马鞍山楚锐科技信息咨询有限公司 | pipes convenient for connection |
| CN110901078A (en) * | 2019-11-23 | 2020-03-24 | 郑州大岭塑胶制品有限公司 | Processing method for welding plastic part with hole on plastic pipe body and implementation device thereof |
| CN112297448A (en) * | 2020-02-27 | 2021-02-02 | 北京字节跳动网络技术有限公司 | Plastic molding part |
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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|---|---|---|---|---|
| CN2397341Y (en) * | 1999-05-28 | 2000-09-20 | 刘伯荣 | Pipeline connecting fittings |
| CN102606819A (en) * | 2012-04-01 | 2012-07-25 | 新兴铸管股份有限公司 | Connecting structure for pipe openings |
| CN202432151U (en) * | 2012-01-13 | 2012-09-12 | 鞍钢集团矿业公司 | Connection flange device for pneumatic conveying pipelines |
| CN202691365U (en) * | 2012-08-11 | 2013-01-23 | 浙江万强法兰有限公司 | Conical bump slot double sealing flange plate |
-
2016
- 2016-12-27 CN CN201611227324.4A patent/CN106838508B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2397341Y (en) * | 1999-05-28 | 2000-09-20 | 刘伯荣 | Pipeline connecting fittings |
| CN202432151U (en) * | 2012-01-13 | 2012-09-12 | 鞍钢集团矿业公司 | Connection flange device for pneumatic conveying pipelines |
| CN102606819A (en) * | 2012-04-01 | 2012-07-25 | 新兴铸管股份有限公司 | Connecting structure for pipe openings |
| CN202691365U (en) * | 2012-08-11 | 2013-01-23 | 浙江万强法兰有限公司 | Conical bump slot double sealing flange plate |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518913A (en) * | 2018-12-29 | 2019-03-26 | 佛山市南海保达建筑机械设备有限公司 | A kind of truncated cone-shaped floor garbage shaft |
| CN110468937A (en) * | 2019-08-23 | 2019-11-19 | 广东祥实建设有限公司 | A kind of hydraulic engineering drainage pipeline convenient for Rapid Combination installation |
| CN110468937B (en) * | 2019-08-23 | 2020-10-20 | 广东祥实建设有限公司 | Drainage pipe for hydraulic engineering convenient to fast assembly and installation |
| CN110735976A (en) * | 2019-10-30 | 2020-01-31 | 马鞍山楚锐科技信息咨询有限公司 | pipes convenient for connection |
| CN110901078A (en) * | 2019-11-23 | 2020-03-24 | 郑州大岭塑胶制品有限公司 | Processing method for welding plastic part with hole on plastic pipe body and implementation device thereof |
| CN110901078B (en) * | 2019-11-23 | 2022-01-28 | 浙江诺洁管业有限公司 | Processing method for welding plastic part with hole on plastic pipe body and implementation device thereof |
| CN112297448A (en) * | 2020-02-27 | 2021-02-02 | 北京字节跳动网络技术有限公司 | Plastic molding part |
| WO2021169858A1 (en) * | 2020-02-27 | 2021-09-02 | 北京字节跳动网络技术有限公司 | Plastic molded component |
| CN112297448B (en) * | 2020-02-27 | 2022-04-26 | 北京字节跳动网络技术有限公司 | Plastic molding part |
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106838508B (en) | 2018-11-06 |
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Address after: 402160 No. 2408, Xinglong Avenue, Yongchuan District, Chongqing Patentee after: Ad pipeline (Chongqing) Co.,Ltd. Address before: 402160 No. 2408, Xinglong Avenue, Yongchuan District, Chongqing Patentee before: CHONGQING YONGGAO PLASTIC DEVELOPMENT Co.,Ltd. |