CN110340340A - A kind of FTSC sheet blank continuous casting immerseable gate molding die and forming method - Google Patents
A kind of FTSC sheet blank continuous casting immerseable gate molding die and forming method Download PDFInfo
- Publication number
- CN110340340A CN110340340A CN201910776217.4A CN201910776217A CN110340340A CN 110340340 A CN110340340 A CN 110340340A CN 201910776217 A CN201910776217 A CN 201910776217A CN 110340340 A CN110340340 A CN 110340340A
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- Prior art keywords
- rigid die
- die
- rigid
- flexible
- blank
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Links
- 238000000465 moulding Methods 0.000 title claims abstract description 29
- 238000009749 continuous casting Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 14
- 239000002893 slag Substances 0.000 claims description 15
- 210000004907 gland Anatomy 0.000 claims description 12
- 238000005056 compaction Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 206010009696 Clumsiness Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
Abstract
The invention belongs to functional refractory production application technical fields, propose a kind of FTSC sheet blank continuous casting immerseable gate molding die.It is proposed, FTSC sheet blank continuous casting immerseable gate molding die is combined by rigid die, flexible jacket combination and liner locating piece three parts are constituted；Rigid die combination has a cylindrical base；The top of cylindrical base has the rigid die I upwardly extended；The two sides of rigid die I are symmetrically arranged with rigid die II；The outside of rigid die II is provided with rigid die III；The outside of rigid die III is additionally provided with rigid die IV, and III, two rigid die II of rigid die described in two rigid die IV, two and the connection of rigid die I form a U-shaped short slot；It is coated on the flexible jacket combination that rigid die group closes and has and be nested with the flexible jacket closed in entire rigid die group.The present invention improves production efficiency and reduces production cost.
Description
Technical field
The invention belongs to functional refractory production application technical fields, and in particular to a kind of FTSC sheet blank continuous casting immersion
Formula mouth of a river molding die and forming method.
Background technique
As soon as Sheet-bar Continuous Casting Technique is a short route near net shape continuous casting continuous rolling technology, with conventional continuous casting technology difference
It is that slab thickness is much smaller than the thickness of conventional continuous casting steel billet, specificity of the Submersed nozzle of sheet billet in structure and uses item
Part is harsher, and same covering slag, crystallizer are considered as three crucial the relevant technologies of sheet blank continuous casting together；FTSC sheet billet
There is specificity, top is circle, is cooperated with middle water containing opening, and lower part is pancake, deeply in continuous casting immersion outlet structure
In the certain crystallizer of width.
FTSC sheet blank continuous casting submersed nozzle uses isostatic cool pressing technological forming at present, and mold for forming is generally by rigidity
Mold and rubber package set are constituted.Wherein rubber package set is divided into inside and outside two parts, and interior section is two halves structure, and shape is cylinder
Body, centre are loading type chamber；Exterior section is whole cylindric and interior section cooperation for constituting complete closed molding space.
Above-mentioned mold for forming, using clumsiness, large labor intensity, production efficiency is low, and can not achieve nearly end form moulding process, is easily formed
Product stress defect causes product use reliability to decline.
Summary of the invention
The purpose of the present invention is to propose to a kind of FTSC sheet blank continuous casting immerseable gate molding die and forming methods, make
The nearly end form molding of the compound isostatic cool pressing of FTSC sheet blank continuous casting submersed nozzle functionally gradient, while light weight may be implemented in it
Change mould structure, simplifies filling material difficulty, can satisfy efficient production, save cost of material.
The present invention adopts the following technical solutions to accomplish the above objectives:
A kind of FTSC sheet blank continuous casting immerseable gate molding die, molding die combines by rigid die, flexible jacket group
It closes and liner locating piece three parts is constituted；The rigid die combination has a cylindrical base；The cylindrical bottom seat tool
There is the cylindrical body upwardly extended；The top of the cylindrical body has the rigid die I upwardly extended；The rigid die I is cut
By circular arc, gradually transition is straight line to face shape, and width is gradually reduced from bottom to top；The two sides of the rigid die I are symmetrically arranged with
Rigid die II；The faying face of the rigid die II and rigid die I is planarea；The rigid die II and rigid die
The section that I combination is constituted is track type, and the length of the race track shaped cross-section gradually increases from bottom to top, and width is gradually reduced；
The outside of the rigid die II is provided with rigid die III；The rigid die III is inner concave shape arc block；The rigidity
The upper surface of mold III is higher than the upper surface of rigid die II；The outside of the rigid die III is additionally provided with rigid die IV,
III, two rigid die II of rigid die described in rigid die IV, two described in two and rigid die I are distinguished
Entirety is formed by I-shaped key connection, a U-shaped short slot is collectively formed in cooperation；It is coated on the flexible jacket group that rigid die group is closed
It closes to have and is nested with the flexible jacket closed in entire rigid die group；The flexible jacket is the foldable structure in upper end；Institute
The upper surface for stating flexible jacket is higher than the upper surface of entire rigid die combination；The lower end of the flexibility jacket and the cylinder
The flexible heelpiece being nested in cylindrical base is provided between shape pedestal；The liner locating piece is nested in rigid die III
Lower edge position；It is to be divided into liner base that the liner locating piece, which combines flexible jacket with rigid die and is formed by space,
Expect charge space and slag line blank charge space.
The flexible jacket combination also has the flexible gland to closing flexible jacket upper surface and is located at flexible bag
Cover multiple flexible briquettings of inner wall upper end.
The hardness of the flexibility jacket successively reduces from bottom to top.
A kind of forming method of FTSC sheet blank continuous casting immerseable gate molding die, the specific steps are as follows:
The rigid die I, the rigid die II are made up of to form entirety by the first step I-shaped key combination；
Rigid die I, the rigid die II after combination is placed in flexibility by cylindrical body and cylindrical base by second step
It in heelpiece, then lifts and is placed in the flexible jacket, constitute blank charge space；Flexible bag set top be turned over downwards to
The position of liner locating piece upper edge point；
Third step places the liner locating piece to the top of rigid die I, the rigid die II, and utilizes pilot pin
After determining position, liner blank stocking space is constituted with the rigid die respectively and constitutes slag line blank with the flexible jacket
Stocking space is successively loaded the vertical break away from moulds of liner locating piece after liner blank and slag line blank respectively, that is, is completed
The filling of the graded composite of liner blank and slag line blank；
4th step, by rigid die I, the rigid die II of the rigid die IV, the installation of rigid die III to after combining
It is upper that rigid die combination is formed by I-shaped key connection；The part that the flexible jacket flips up is restored to the original state, is continued
The top that filling ontology blank is combined to the rigid die；
The flexible briquetting and the flexible gland are successively pressed into the flexible jacket respectively, it is whole to complete mold by the 5th step
Body sealing terminates blank and loads process, can carry out the cold isostatic compaction compacting of FTSC Submersed nozzle of sheet billet；
6th step after completing cold isostatic compaction compacting, is successively taken out the flexible gland and the flexible briquetting, is made after molding
Product and the rigid die composite entity lift abjection from the flexible jacket upwards；
Rigid die combination is successively deviate from product by the 7th step, horizontal product, rigid die I, the rigid die II, just
Property mold III is deviate from by lower part, and the rigid die IV is deviate from by top, is finally completed FTSC Submersed nozzle of sheet billet green body
Molding.
A kind of FTSC sheet blank continuous casting immerseable gate molding die proposed by the present invention and forming method, use are above-mentioned
Technical solution, optimizes the structure of rigid die and flexible jacket, and the design of lightweight jacket simplifies and realizes the primary of liner blank
Operation is loaded, being effectively reduced for operation intensity and difficulty is realized；Nearly end form molding is realized simultaneously, improves production efficiency and drop
Low production cost.
Detailed description of the invention
Fig. 1 is FTSC sheet blank continuous casting submersed nozzle mold for forming overall structure diagram of the invention；
Fig. 2 is rigid die combining structure schematic diagram of the invention；
Fig. 3 is I-shaped bond structure schematic diagram of the invention；
Fig. 4 is flexible jacket combining structure schematic diagram of the invention；
Fig. 5 is liner locating piece schematic diagram of the invention；
Fig. 6 is blank filling operation schematic diagram of the invention.
In figure: 1, rigid die combines, 2, flexible jacket combination, 3, liner locating piece, 4, rigid die I, 5, rigid mould
Tool II, 6, rigid die III, 7, rigid die IV, 8, I-shaped key, 9, flexible jacket, 10, flexible heelpiece, 11, flexible briquetting,
12, flexible gland.
Specific embodiment
The present invention is described in further detail with reference to the drawings and specific embodiments, but not as to limit of the invention
It is fixed.
As shown in Figure 1, a kind of FTSC sheet blank continuous casting immerseable gate molding die, molding die is by rigid die group
It closes 1, flexible jacket combination 2 and 3 three parts of liner locating piece is constituted；In conjunction with Fig. 2, the rigid die combination 1 has a circle
Cylindrical base；The cylindrical base has the cylindrical body upwardly extended；The top of the cylindrical body is rigid with upwardly extending
Property mold I 4；By circular arc, gradually transition is straight line to I 4 cross sectional shape of rigid die, and width is gradually reduced from bottom to top；Institute
The two sides for stating rigid die I 4 are symmetrically arranged with rigid die II 5；The faying face of the rigid die II 5 and rigid die I 4 is
Planarea；The rigid die II 5 combines the section of composition with rigid die I 4 as track type, and the length of the race track shaped cross-section
Degree gradually increases from bottom to top, and width is gradually reduced；The outside of the rigid die II 5 is provided with rigid die III 6；Described
Rigid die III 6 is inner concave shape arc block；The upper surface of the rigid die III 6 is higher than the upper surface of rigid die II 5；It is described
The outside of rigid die III 6 is additionally provided with rigid die IV 7, rigid die described in rigid die IV 7, two described in two
III 6, two rigid dies II 5 and rigid die I 4 form entirety by the connection of I-shaped key 8 respectively, and cooperation is collectively formed
One U-shaped short slot；In conjunction with Fig. 4, it is coated on the flexible jacket combination that rigid die group is closed and has and be nested in entire rigid die group
The flexible jacket 9 closed；Flexible jacket combination 2 is by flexible jacket 9, flexible heelpiece 10, flexible briquetting 11 and flexible gland 12 4
Part is constituted, and material generally selects polyurethane rubber, wherein flexible jacket 9 has gradient rigid structure, lower part hardness Shao A50-
60, middle part hardness Shao A40-50, top hardness Shao A25-35；The flexible jacket 9 is the foldable structure in upper end；It is described soft
Property jacket 9 upper surface be higher than entire rigid die combination upper surface；The lower end of the flexibility jacket 9 and the cylinder
The flexible heelpiece 10 being nested in cylindrical base is provided between pedestal；The liner locating piece 3 is nested in rigid die III 6
Lower edge position；In conjunction with Fig. 5, the liner locating piece 3 is up big and down small frustum type block；The liner locating piece 3
It is to be divided into liner blank charge space and the filling of slag line blank that flexible jacket 9 is combined to be formed by space with rigid die
Space.
The flexible jacket combination 9, which also has, is located at flexibility to the flexible gland of closing flexible jacket upper surface and 12
Multiple flexible briquettings 11 of jacket inner wall upper end.
The hardness bottom right of the flexibility jacket 9 successively reduces upwards.
As shown in fig. 6, a kind of forming method of FTSC sheet blank continuous casting immerseable gate molding die, specific steps are such as
Under:
The rigid die I 4, the rigid die II 5 are made up of to form entirety by the first step I-shaped key combination；I-shaped key
Structure it is as shown in Figure 3；The liner locating piece 3, is generally made of stainless steel, and thickness is not more than 1mm, and inside is uniformly distributed
Pilot pin 4.
Rigid die I 4, the rigid die II 5 after combination is passed through cylindrical body and cylindrical bottom seating by second step
It in flexible heelpiece 10, then lifts and is placed in the flexible jacket, constitute blank charge space；The flexible bag cover top to
It is lower to turn down to the position of the 3 upper edge point of liner locating piece；
Third step places the liner locating piece 3 to the top of rigid die I 4, the rigid die II 5, and utilizes positioning
After needle determines position, liner blank stocking space is constituted with the rigid die respectively and constitutes slag line base with the flexible jacket
Expect stocking space, successively loads respectively by the vertical break away from moulds of liner locating piece after liner blank and slag line blank, i.e., it is complete
It is loaded at the graded composite of liner blank and slag line blank；
4th step, by rigid die I 4, the rigid die of the rigid die IV 7, the installation of rigid die III 6 to after combining
Rigid die combination is formed by the connection of I-shaped key 8 on II 5；The part that the flexible jacket 9 flips up is restored to the original state,
Continue to load the top that ontology blank is combined to the rigid die；
The flexible briquetting 11 and the flexible gland 12 are successively pressed into the flexible jacket 9 respectively, complete mould by the 5th step
Have integral sealing, terminate blank and load process, the cold isostatic compaction compacting of FTSC Submersed nozzle of sheet billet can be carried out；
6th step after completing cold isostatic compaction compacting, is successively taken out the flexible gland and the flexible briquetting, is made after molding
Product and the rigid die composite entity lift abjection from the flexible jacket upwards；
Rigid die combination is successively deviate from product by the 7th step, horizontal product, rigid die I, the rigid die II, just
Property mold III is deviate from by lower part, and the rigid die IV is deviate from by top, is finally completed FTSC Submersed nozzle of sheet billet green body
Molding.
Inner cavity design requirement of the rigid die combination according to FTSC Submersed nozzle of sheet billet, has by circular cross-section
The monnolithic case structure excessive to race track shaped cross-section, can be decomposed into several branches by I-shaped key connection, in FTSC thin plate
Step demoulding may be implemented after base submersed nozzle cold isostatic compaction.The flexibility jacket combination is by flexible jacket, flexible bottom
Pad, flexible briquetting and flexible 4 part of gland are constituted.Wherein the flexible bag set has gradient rigid structure, and lower part hardness is higher,
To realize good supporting function；Middle part hardness is moderate, has certain elasticity, can be in FTSC Submersed nozzle of sheet billet
Appropriate elastic deformation, realizes article removal during abjection after cold isostatic compaction；Top hardness is lower, loads rank in blank
Section, may be implemented to be turned over downwards, shows the space of liner blank and slag line blank graded composite one-time pad blank.In described
Uniformly distributed pilot pin inside locating piece is served as a contrast, in blank filling stage is set between rigid die and flexible jacket, respectively constitutes
Serve as a contrast the charge space of blank and slag line blank.
Claims (4)
1. a kind of FTSC sheet blank continuous casting immerseable gate molding die, it is characterised in that: molding die is by rigid die group
It closes, flexible jacket combination and liner locating piece three parts are constituted；The rigid die combination has a cylindrical base；It is described
Cylindrical base has the cylindrical body upwardly extended；The top of the cylindrical body has the rigid die I upwardly extended；Described
By circular arc, gradually transition is straight line to I cross sectional shape of rigid die, and width is gradually reduced from bottom to top；The two of the rigid die I
Side is symmetrically arranged with rigid die II；The faying face of the rigid die II and rigid die I is planarea；The rigid die
II section that composition is combined with rigid die I is track type, and the length of the race track shaped cross-section gradually increases from bottom to top, wide
Degree is gradually reduced；The outside of the rigid die II is provided with rigid die III；The rigid die III is inner concave shape arc
Block；The upper surface of the rigid die III is higher than the upper surface of rigid die II；The outside of the rigid die III is additionally provided with
Rigid die IV, III, two rigid die II of rigid die described in rigid die IV, two described in two and just
Property mold I is formed respectively by I-shaped key connection whole, cooperate and a U-shaped short slot be collectively formed；Rigid die group is coated on to close
Flexible jacket combination have be nested with the flexible jacket closed in entire rigid die group；The flexible jacket is that lower end can be turned over
The structure of folding；The upper surface of the flexibility jacket is higher than the upper surface of entire rigid die combination；The lower end of the flexibility jacket
The flexible heelpiece being nested in cylindrical base is provided between the cylindrical base；The liner locating piece is nested with
The lower edge position of rigid die III；The liner locating piece, which combines flexible jacket with rigid die, to be formed by space and is
It is divided into liner blank charge space and slag line blank charge space.
2. a kind of FTSC sheet blank continuous casting immerseable gate molding die as described in claim 1, it is characterised in that: described
The combination of flexible jacket also there is the flexible gland to closing flexible jacket upper surface and be located at flexible jacket inner wall upper end
Multiple flexible briquettings.
3. a kind of FTSC sheet blank continuous casting immerseable gate molding die as described in claim 1, it is characterised in that: described
The hardness of flexible jacket successively reduces from bottom to top.
4. molding using a kind of any FTSC sheet blank continuous casting immerseable gate molding die progress of claim 1-3
Method, the specific steps are as follows:
The rigid die I, the rigid die II are made up of to form entirety by the first step I-shaped key combination；
Rigid die I, the rigid die II after combination is placed in flexibility by cylindrical body and cylindrical base by second step
It in heelpiece, then lifts and is placed in the flexible jacket, constitute blank charge space；Flexible bag set top be turned over downwards to
The position of liner locating piece upper edge point；
Third step places the liner locating piece to the top of rigid die I, the rigid die II, and utilizes pilot pin
After determining position, liner blank stocking space is constituted with the rigid die respectively and constitutes slag line blank with the flexible jacket
Stocking space is successively loaded the vertical break away from moulds of liner locating piece after liner blank and slag line blank respectively, that is, is completed
The filling of the graded composite of liner blank and slag line blank；
4th step, by rigid die I, the rigid die II of the rigid die IV, the installation of rigid die III to after combining
It is upper that rigid die combination is formed by I-shaped key connection；The part that the flexible jacket flips up is restored to the original state, is continued
The top that filling ontology blank is combined to the rigid die；
The flexible briquetting and the flexible gland are successively pressed into the flexible jacket respectively, it is whole to complete mold by the 5th step
Body sealing terminates blank and loads process, can carry out the cold isostatic compaction compacting of FTSC Submersed nozzle of sheet billet；
6th step after completing cold isostatic compaction compacting, is successively taken out the flexible gland and the flexible briquetting, is made after molding
Product and the rigid die composite entity lift abjection from the flexible jacket upwards；
Rigid die combination is successively deviate from product by the 7th step, horizontal product, rigid die I, the rigid die II, just
Property mold III is deviate from by lower part, and the rigid die IV is deviate from by top, is finally completed FTSC Submersed nozzle of sheet billet green body
Molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776217.4A CN110340340B (en) | 2019-08-22 | 2019-08-22 | Forming die and forming method for FTSC sheet billet continuous casting immersion nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776217.4A CN110340340B (en) | 2019-08-22 | 2019-08-22 | Forming die and forming method for FTSC sheet billet continuous casting immersion nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110340340A true CN110340340A (en) | 2019-10-18 |
| CN110340340B CN110340340B (en) | 2024-03-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910776217.4A Active CN110340340B (en) | 2019-08-22 | 2019-08-22 | Forming die and forming method for FTSC sheet billet continuous casting immersion nozzle |
Country Status (1)
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|---|---|
| CN (1) | CN110340340B (en) |
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|---|---|---|---|---|
| JPH10249826A (en) * | 1997-03-18 | 1998-09-22 | Toshiba Ceramics Co Ltd | Mold unit and molding method for tubular member using the unit |
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| US20050006825A1 (en) * | 2003-07-09 | 2005-01-13 | Kabushiki Kaisha Meidensha | Method of producing molded green body and producing insert by baking the green body |
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| EP1657009A1 (en) * | 2004-11-12 | 2006-05-17 | ARVEDI, Giovanni | Improved submerged nozzle for steel continuous casting |
| CN101704100A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish breathable water inlet used for metal continuous casting plate blank and preparation method thereof |
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| CN102836994A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Production method for submerged nozzle of sheet billet |
| CN203330396U (en) * | 2013-05-30 | 2013-12-11 | 中钢集团洛阳耐火材料研究院有限公司 | Long nozzle forming mould |
| CN105081304A (en) * | 2015-08-26 | 2015-11-25 | 北京利尔高温材料股份有限公司 | Immersion type water gap forming die and manufacturing method thereof |
| CN206588341U (en) * | 2017-02-27 | 2017-10-27 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of submersed nozzle mould |
-
2019
- 2019-08-22 CN CN201910776217.4A patent/CN110340340B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10249826A (en) * | 1997-03-18 | 1998-09-22 | Toshiba Ceramics Co Ltd | Mold unit and molding method for tubular member using the unit |
| JP2001071101A (en) * | 1999-09-03 | 2001-03-21 | Nisshin Steel Co Ltd | Immersion nozzle for continuous casting |
| US20050006825A1 (en) * | 2003-07-09 | 2005-01-13 | Kabushiki Kaisha Meidensha | Method of producing molded green body and producing insert by baking the green body |
| CN2746998Y (en) * | 2004-09-28 | 2005-12-21 | 宝山钢铁股份有限公司 | Immersion type pouring slot for continuously casting special shaped sheet billet |
| EP1657009A1 (en) * | 2004-11-12 | 2006-05-17 | ARVEDI, Giovanni | Improved submerged nozzle for steel continuous casting |
| CN101704100A (en) * | 2009-12-09 | 2010-05-12 | 山东东耐高温材料有限公司 | Tundish breathable water inlet used for metal continuous casting plate blank and preparation method thereof |
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| CN102836994A (en) * | 2012-09-06 | 2012-12-26 | 上海宝明耐火材料有限公司 | Production method for submerged nozzle of sheet billet |
| CN203330396U (en) * | 2013-05-30 | 2013-12-11 | 中钢集团洛阳耐火材料研究院有限公司 | Long nozzle forming mould |
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| Publication number | Publication date |
|---|---|
| CN110340340B (en) | 2024-03-15 |
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