CN104550811B - Backflow blocking type bleed-out preventing centrifugal casting method - Google Patents
Backflow blocking type bleed-out preventing centrifugal casting method Download PDFInfo
- Publication number
- CN104550811B CN104550811B CN201510049003.9A CN201510049003A CN104550811B CN 104550811 B CN104550811 B CN 104550811B CN 201510049003 A CN201510049003 A CN 201510049003A CN 104550811 B CN104550811 B CN 104550811B
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- China
- Prior art keywords
- boss
- end cap
- return port
- centrifugal casting
- type tube
- 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.)
- Expired - Fee Related
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- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 title abstract 2
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 238000005266 casting Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000005457 optimization Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000010425 asbestos Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a backflow blocking type bleed-out preventing centrifugal casting method. The method is characterized by including improving the structure of an end cover in a horizontal centrifugal casting machine, arranging an annular boss on the inner surface of the end cover along the periphery, and arranging a backflow hole penetrating through two sides in the boss. During casting, part of molten metal overflowing outwards from the inner surface of the end cover is blocked by the boss, part of the molten liquid crossing the boss can flow back from the backflow hole, and the molten liquid is avoided overflowing outwards from the end cover, leading to steel sticking of end cover type cylinders. The method has the advantages that the implementation is simplified, the type cylinders are prevented from steel splashing or bleed-out accidents, and production safety is guaranteed.
Description
Technical field
The present invention relates to a kind of centrifugal casting technique field, more particularly, to a kind of obstruct reverse-flow type centrifugal casting steel-leakage preventing side
Method.
Background technology
Centrifugal casting machine is that one kind utilizes centrifugal force, and molten metal enters in the type tube of high-speed rotation, under the action of the centrifugal force
Cooling, molding are to obtain the Casting Equipment of metal casting.Wherein, horizontal casting machine is a kind of typical centrifugal casting machine, mainly
For pouring into a mould various tubular casts.Existing horizontal casting machine primary structure is including horizontally disposed type tube, by becoming below type tube
Support roller supporting reliable support roller to setting are rotated, and support roller is connected with power set and leans on its drive, the internal two ends of type tube
Place is provided with the end cap of annular.The centrifugation rotational power of wherein type tube is mainly carried by the frictional force between type tube and support roller
For being linear contact lay between type tube and support roller, linear contact lay Area comparison is little, and the frictional force providing is smaller, therefore in prior art
The speed of the centrifugal motion of type tube be limited, when the shaping speed demand that rotating speed can not meet pipe fitting such as occurs.In casting
In production process, the casting liquid in type tube not will overflow the end cap of type tube both sides and splash steel or leakage because of centrifugal force
Steel, and, type tube of the prior art is in high-speed rotation, axial constraint less even without type tube is often on support roller
Jump, fluctuation is larger, certain impact, also makes molten steel overflow type tube end cap unavoidably and splashes steel.Even in operating process
Casting liquid casting excess or do operation human users are improper leads to rock, its huge heat energy of molten steel and under the action of the centrifugal force
Kinetic energy impact, also results in and splashes steel or bleed-out accident.When accident produces, light side produces end cap type tube steel bonding, and impact is follow-up
The demoulding works.Heavy then molten steel splashes or steel bonding damages end cap or type tube or even foundry goods is scrapped.And splash steel and bleed-out
During accident, even more serious harm operator personal safety.
In the prior art, the end cap at type tube two ends and type tube collectively constitute forming cavity, splash steel or bleed-out is main when occurring
Containment vessel protection outside by casting machine.But also simply protect the personal safety of operator when splashing steel or bleed-out.Do not solve
Certainly how to protect the protection question of equipment when splashing steel or bleed-out generation and having an accident itself.If end cap, type tube etc. are because of steel bonding
Affect problem that the follow-up demoulding is even scrapped etc..In addition, in existing obstruct reverse-flow type centrifugal casting steel-leakage preventing method, end cap is normal
Often mainly only it is made up of metallic plate, flameproof protection effect is poor, easily burns, in turn result in and splash steel or bleed-out.
How to improve above prior art in case leak-stopping steel phenomenon, improve Casting Equipment safety, be technology in the art
Personnel's technical problem urgently to be resolved hurrily.
Content of the invention
For above-mentioned the deficiencies in the prior art, the technical problem to be solved is：How a kind of enforcement letter is provided
Single, type tube can be avoided well to splash the obstruct reverse-flow type centrifugal casting steel-leakage preventing method of steel or bleed-out accident.
In order to solve above-mentioned technical problem, present invention employs following technical scheme：
A kind of obstruct reverse-flow type centrifugal casting steel-leakage preventing method is it is characterised in that improve end cap in horizontal centrifugal casting machine
Structure, in the boss of the circumferentially arranged annular of end cap inner surface, and setting runs through the return port of both sides so that casting on boss
When, the part metals liquid outwards overflowing from end cap inner surface is intercepted by boss, and the molten metal partly crossing boss can be from backflow
Flow back in hole, it is to avoid molten metal outwards overflows end cap and leads to end cap type tube steel bonding.
Specifically, this method can adopt the horizontal centrifugal casting machine of following structure to realize, this horizontal centrifugal casting machine
Including horizontally disposed type tube, by two pairs of support rollers supportings being arranged in pairs and reliable support roller is rotated below type tube, support roller and
Power set are connected and lean on its drive, and type tube is provided with the overall end cap in annular, wherein, in described end cap at internal two ends
Surface also compartment of terrain convexes to form the boss of three ring shapes；It is provided with connection outside the boss face on described outermost one circle boss to arrive
The return port of medial surface, return port is obliquely installed and is closer to a stomidium apart from type tube axle center positioned at the aperture in outside the boss face
Mouthful.
So, during casting, three road boss play the effect of obstruct, can prevent well molten metal from end cap inner surface to
Outer outflow.Simultaneously because above the iris action of twice boss is so that outermost one encloses lug boss position molten metal power outwardly
Amount is smaller, the return port of position setting herein, and the molten metal in outside the boss face can be through in the presence of centrifugal force component
Cross the return port being obliquely installed and be back to inner side from outside the boss, preferably avoid molten metal excessive.
As optimization, the aperture that described return port was integrally conical and was located at outside the boss face is larger diameter end.So, this
The change in aperture can be leaned on inside sample return port to form pressure reduction so that molten metal in return port exit to the work that springs up outside outlet
Pour into the active force of return port when firmly more than molten metal on boss medial surface outwardly, better assure that reflowing result.
As optimization, the aperture that described return port is located at outside the boss face is obliquely installed, and this orifice distance type tube axle center
It is located at closer to side edge and more leans on inner position, opposite side edge is located at position more outward.In such manner, it is possible to guarantee outside the boss
The molten metal in face can flow into in the hole preferably at return port, it is to avoid molten metal crosses return port outwardly it is ensured that returning
Stream effect.
As optimization, the return port that described outermost one encloses on boss is provided with multiple and is evenly arranged in the circumferential as one
Circle, and it is provided with a circle backflash on the outside the boss face of backflow hole site, return port is located in backflash.So, metal
Liquid is introduced in backflash, then enters return port from backflash again, this makes it possible to better ensure that molten metal enters into back
It is ensured that the formation of return port pressure at inlet is it is ensured that reflowing result in discharge orifice.
As optimization, there is at described end cap exterior side port cylindrical in shape prolonging of entirety extending axially outwardly formation
Extending portion, extension outer end outwards exceeds type tube endface position, and extension outer end port has and radially extends leading of formation
To ring flange, the also sheathed protective cover being fixed with a hollow annular structure in extension outer end port, described guide flange
In protective cover and protective cover lateral surface center is just provided with opening to extension outer end port.
So end cap exterior side port is extended outward type tube port position and be provided with guide flange, even if also existing
The casting molten metal that part is not blocked backflow flows out from end cap mouth, also can get rid of along guide flange from radially outward after outflow
Go out, and collected by protective cover, and then avoid the phenomenon generation that molten metal splashing is hurted sb.'s feelings or spilt rear steel bonding damage end cap, more
Ensure production safety well.
As optimization, described guide flange outer end face is evenly distributed with, along annular, the drainage trough being disposed radially.This
Sample, the molten metal of outflow can preferably radially be guided by drainage trough.
Preferably selecting is that drainage trough entry position is set to the tubaeform and adjacent bellmouth entrance extending out in end cap
It is connected at external port.So whole port perimeter flows out to end cap molten metal all can be received by drainage trough and so that it is radially flowed
Go out.Drainage trough is made preferably to reach drainage effect.
As optimization, the fire proofed wood that described end cap includes end cap body and is arranged at end cap body the inner end face and inner surface
The bed of material（When being embodied as, guide flange outer end face is also equipped with refractory masses, and drainage trough is formed thereon）, end cap is originally
The refractory material layer surface of internal end end face is additionally provided with one layer of asbestos backing plate.As such, it is possible to improve the protective refractory of end cap,
Avoid end cap to be burned, improve protective action.
As optimization, described end cap and asbestos pad board connect a step being limited in the inner side of type tube inner chamber and outer
The edge annular of side is uniformly plugged between the circle alignment pin in type tube inner ring wall pin-and-hole.
So, end cap platform rank and alignment pin clamping are spacing, and the fixed installation of end cap can be better achieved, and reach conveniently
The effect of dismounting.
As optimization, described end cap body is by integrally the first steel beam column ringwise positioned at inner side, positioned at middle part
The entirety of position the second steel beam column cylindrical in shape and be located at overall the 3rd steel beam column welding ringwise of outer fix and obtain, institute
State the first steel beam column inner surface and there is an annular holding tank.
So, the production of convenient end cap body, and the combination that improve between end cap body and refractory masses is strong
Degree, improves end cap flameproof effect.
In sum, the present invention has that enforcement is simple, and type tube can be avoided well to splash the excellent of steel or bleed-out accident
Point.
Brief description
The structural representation of the horizontal centrifugal casting machine adopting when Fig. 1 is embodied as the present invention.
Fig. 2 is the enlarged diagram of backflow hole site at A in Fig. 1.
Fig. 3 is the side view at independent guide flange in Fig. 1.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
A kind of obstruct reverse-flow type centrifugal casting steel-leakage preventing method, it is characterized by, and improves end cap in horizontal centrifugal casting machine
Structure, in the boss of the circumferentially arranged annular of end cap inner surface, and setting runs through the return port of both sides so that casting on boss
When, the part metals liquid outwards overflowing from end cap inner surface is intercepted by boss, and the molten metal partly crossing boss can be from backflow
Flow back in hole, it is to avoid molten metal outwards overflows end cap and leads to end cap type tube steel bonding.
Specifically, this method first obtains the horizontal type centrifugal-casting after a kind of improved structure as Figure 1-3 when implementing
Machine, realizes preventing from splashing steel and bleed-out phenomenon it is ensured that production safety in casting by this horizontal centrifugal casting machine.This horizontal centrifuge
Including horizontally disposed type tube 1, supported by two pairs of support rollers 2 being arranged in pairs below type tube 1 and reliable support roller is rotated, support roller
2 are connected with power set 3 and by its drive, are provided with the overall end cap 4 in annular at the internal two ends of type tube 1, wherein, described
End cap 4 inner surface also compartment of terrain convexes to form the boss 10 of three ring shapes.Wherein, the company of being provided with described outermost one circle boss
To the return port 11 of medial surface, return port 11 is obliquely installed and is located at the aperture in outside the boss face is apart from type in logical outside the boss face
Cylinder axle center is closer to one end aperture.
So, three road boss play the effect of obstruct, can prevent molten metal from flowing outwardly from end cap inner surface well.
Simultaneously as the iris action of front twice boss, outermost one circle lug boss position molten metal strength outwardly is smaller,
The return port of position setting herein, the molten metal in outside the boss face can be through returning of being obliquely installed in the presence of centrifugal force component
Discharge orifice is back to inner side from outside the boss, preferably avoids molten metal excessive.
Wherein, the aperture that described return port 11 was integrally conical and was located at outside the boss face is larger diameter end.So, so
The change in aperture can be leaned on inside return port to form pressure reduction so that molten metal in return port exit to the effect that springs up outside outlet
Power be more than on boss medial surface molten metal outwardly when pour into the active force of return port, better assure that reflowing result.
Wherein, described return port 11 is obliquely installed positioned at the aperture in outside the boss face, and this orifice distance type tube axle center is more
Nearly side edge is located at and more leans on inner position, and opposite side edge is located at position more outward.In such manner, it is possible to ensure outside the boss face
Molten metal can preferably at return port in the hole flow into, it is to avoid molten metal cross return port outwardly it is ensured that backflow
Effect.
Wherein, the return port 11 that described outermost one encloses on boss is provided with multiple and is evenly arranged as a circle in the circumferential,
And it is provided with a circle backflash 12 on the outside the boss face of backflow hole site, return port 11 is located in backflash 12.So, gold
Belong to liquid to be introduced in backflash, then enter return port from backflash again, this makes it possible to better ensure that molten metal enters into
It is ensured that the formation of return port pressure at inlet is it is ensured that reflowing result in return port.
There is at wherein said end cap 4 exterior side port the entirety extension cylindrical in shape extending axially outwardly formation
Portion, extension outer end outwards exceeds type tube endface position, and extension outer end port has the guiding radially extending formation
Ring flange 5, the also sheathed protective cover 6 being fixed with a hollow annular structure in extension outer end port, described guide flange 5
In protective cover 6 and protective cover 6 lateral surface center is just provided with opening to extension outer end port.
So end cap exterior side port is extended outward type tube port position and be provided with guide flange, even if also existing
The casting molten metal that part is not blocked backflow flows out from end cap mouth, also can get rid of along guide flange from radially outward after outflow
Go out, and collected by protective cover, and then avoid the phenomenon generation that molten metal splashing is hurted sb.'s feelings or spilt rear steel bonding damage end cap, more
Ensure production safety well.
Wherein, described guide flange 5 outer end face is evenly distributed with, along annular, the drainage trough 7 being disposed radially.So,
The molten metal of outflow can preferably radially be guided by drainage trough.
Wherein, drainage trough 7 entry position is set to the tubaeform and adjacent bellmouth entrance extending out in end cap external port
Place is connected.So whole port perimeter flows out to end cap molten metal all can be received by drainage trough and so that it is flowed radially out.Make
Drainage trough preferably reaches drainage effect.
Wherein, the fire proofed wood that described end cap includes end cap body 41 and is arranged at the inner end face of end cap body 41 and inner surface
The bed of material 42（When being embodied as, guide flange outer end face is also equipped with refractory masses, and drainage trough is formed thereon）, end cap
Refractory masses 42 surface of the inner end face of body 41 is additionally provided with one layer of asbestos backing plate 8.As such, it is possible to improve the fire resisting of end cap
Protective, it is to avoid end cap is burned, improves protective action.
Wherein, described end cap 4 and asbestos backing plate 8 clamping are limited in a step and outer of the inner side of type tube inner chamber
The edge annular of side is uniformly plugged between the circle alignment pin 9 in type tube inner ring wall pin-and-hole.
So, end cap platform rank alignment pin is spacing, and the fixed installation of end cap can be better achieved.
Wherein, described end cap body 41 is by integrally the first steel beam column ringwise positioned at inner side, positioned at middle position
The entirety put the second steel beam column cylindrical in shape and be located at overall the 3rd steel beam column welding ringwise of outer fix and obtain, described
First steel beam column inner surface has an annular holding tank.
So, the production of convenient end cap body, and the combination that improve between end cap body and refractory masses is strong
Degree, improves end cap flameproof effect.
Therefore the present invention has enforcement simply, device is easy to dismount, and can effectively reduce centrifugal casting and splash the generation of steel accident, and
Solve the protection question of the equipment such as type tube and end cap when splashing steel or even bleed-out in centrifugal casting process it is ensured that production safety
Function.
Claims (4)
1. a kind of obstruct reverse-flow type centrifugal casting steel-leakage preventing method is it is characterised in that improve end cap knot in horizontal centrifugal casting machine
Structure, in the boss of the circumferentially arranged annular of end cap inner surface, and setting runs through the return port of both sides so that casting on boss
When, the part metals liquid outwards overflowing from end cap inner surface is intercepted by boss, and the molten metal partly crossing boss can be from backflow
Flow back in hole, it is to avoid molten metal outwards overflows end cap and leads to end cap type tube steel bonding；
This method adopts the horizontal centrifugal casting machine of following structure to realize, and described horizontal centrifugal casting machine, including horizontally disposed
Type tube, is supported by two pairs of support rollers being arranged in pairs below type tube and reliable support roller is rotated, support roller is connected simultaneously with power set
By its drive, type tube is provided with the overall end cap in annular, described end cap inner surface also compartment of terrain convex shaped at internal two ends
The boss of Cheng Yousan ring shape, outermost one encloses the return port being provided with connection outside the boss face on boss to medial surface, return port
The aperture being obliquely installed and being located at outside the boss face is closer to one end aperture apart from type tube axle center；Make the metal in outside the boss face
Liquid can be back to inner side through the return port being obliquely installed from outside the boss in the presence of centrifugal force component.
2. obstruct reverse-flow type centrifugal casting steel-leakage preventing method as claimed in claim 1 is it is characterised in that described return port is overall
Aperture that is tapered and being located at outside the boss face is larger diameter end.
3. obstruct reverse-flow type centrifugal casting steel-leakage preventing method as claimed in claim 1 is it is characterised in that described return port is located at
The aperture in outside the boss face is obliquely installed, and this orifice distance type tube axle center is located at closer to side edge and more leans on inner position, separately
Side edge is located at position more outward.
4. as claimed in claim 1 obstruct reverse-flow type centrifugal casting steel-leakage preventing method it is characterised in that described outermost one enclose convex
Return port on platform is provided with multiple and is evenly arranged as a circle in the circumferential, and sets on the outside the boss face of backflow hole site
It is equipped with a circle backflash, return port is located in backflash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049003.9A CN104550811B (en) | 2015-01-30 | 2015-01-30 | Backflow blocking type bleed-out preventing centrifugal casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049003.9A CN104550811B (en) | 2015-01-30 | 2015-01-30 | Backflow blocking type bleed-out preventing centrifugal casting method |
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| Publication Number | Publication Date |
|---|---|
| CN104550811A CN104550811A (en) | 2015-04-29 |
| CN104550811B true CN104550811B (en) | 2017-02-22 |
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| CN201510049003.9A Expired - Fee Related CN104550811B (en) | 2015-01-30 | 2015-01-30 | Backflow blocking type bleed-out preventing centrifugal casting method |
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| CN116352043B (en) * | 2023-06-02 | 2023-08-25 | 江苏鑫泽不锈钢制品有限公司 | Stainless steel pipe casting device |
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| JP2001205409A (en) * | 2000-01-27 | 2001-07-31 | Kubota Corp | Casting device for pile with helical line |
| CN2645817Y (en) * | 2003-08-16 | 2004-10-06 | 庄河市轧辊厂 | Centrifugal casting drying cylinder die |
| CN1814378A (en) * | 2006-03-14 | 2006-08-09 | 安泰科技股份有限公司 | Production method of grooved composite roll for centrifugal casting |
| CN101041165A (en) * | 2007-04-03 | 2007-09-26 | 西安交通大学 | Low-aliquation high-speed steel roll and the preparing method |
| CN101245856A (en) * | 2008-03-27 | 2008-08-20 | 济南东方天明机械有限公司 | Bearing sealing device |
| CN201235396Y (en) * | 2008-08-08 | 2009-05-13 | 江苏钢宝轧辊有限公司 | Horizontal centrifugal casting machine |
| CN201461323U (en) * | 2009-06-22 | 2010-05-12 | 桐昆集团股份有限公司 | Leakage-blocking and oil-scraping end cover used in piston of air compressor |
-
2015
- 2015-01-30 CN CN201510049003.9A patent/CN104550811B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001205409A (en) * | 2000-01-27 | 2001-07-31 | Kubota Corp | Casting device for pile with helical line |
| CN2645817Y (en) * | 2003-08-16 | 2004-10-06 | 庄河市轧辊厂 | Centrifugal casting drying cylinder die |
| CN1814378A (en) * | 2006-03-14 | 2006-08-09 | 安泰科技股份有限公司 | Production method of grooved composite roll for centrifugal casting |
| CN101041165A (en) * | 2007-04-03 | 2007-09-26 | 西安交通大学 | Low-aliquation high-speed steel roll and the preparing method |
| CN101245856A (en) * | 2008-03-27 | 2008-08-20 | 济南东方天明机械有限公司 | Bearing sealing device |
| CN201235396Y (en) * | 2008-08-08 | 2009-05-13 | 江苏钢宝轧辊有限公司 | Horizontal centrifugal casting machine |
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| CN104550811A (en) | 2015-04-29 |
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Effective date of registration: 20210309 Address after: 400084 No. 2, Magnesium Bridge Road, Area A, Jianqiao Industrial Park, Dadukou District, Chongqing Patentee after: CHONGQING IRON & STEEL INSTITUTE Co.,Ltd. Address before: Three village 400080 Dadukou District of Chongqing weir building 1 No. 1 Patentee before: CHONGQING IRON & STEEL (GROUP)Co.,Ltd. |
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Address after: 400084 No. 2, Magnesium Bridge Road, Area A, Jianqiao Industrial Park, Dadukou District, Chongqing Patentee after: Baowu Teye Hangyan Technology Co.,Ltd. Address before: 400084 No. 2, Magnesium Bridge Road, Area A, Jianqiao Industrial Park, Dadukou District, Chongqing Patentee before: CHONGQING IRON & STEEL INSTITUTE Co.,Ltd. |
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