CN111378880A - Rare earth cast aluminum alloy mobile phone shell and preparation method thereof - Google Patents
Rare earth cast aluminum alloy mobile phone shell and preparation method thereof Download PDFInfo
- Publication number
- CN111378880A CN111378880A CN202010112076.9A CN202010112076A CN111378880A CN 111378880 A CN111378880 A CN 111378880A CN 202010112076 A CN202010112076 A CN 202010112076A CN 111378880 A CN111378880 A CN 111378880A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- mobile phone
- rare earth
- phone shell
- earth cast
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of mobile phone shells, in particular to a rare earth cast aluminum alloy mobile phone shell and a preparation method thereof. The rare earth cast aluminum alloy mobile phone shell is prepared from raw materials including Si, Fe, Mg, Mn, Sc, Ti and Al through heating, melting, refining, degassing, refining, modifying, die casting, machining and surface treatment. The rare earth cast aluminum alloy mobile phone shell takes Sc-containing aluminum alloy as a raw material, is subjected to anodic oxidation after machining, is compact in mobile phone shell structure, excellent in surface performance, free of material grains, black points and black line defects, and has good punch forming performance, cutting machine machining performance and corrosion resistance. In addition, the rare earth cast aluminum alloy mobile phone shell has the advantages of few preparation procedures, low cost and high yield, is suitable for large-scale production, popularization and application, and has good economic benefit and market application prospect.
Description
Technical Field
The invention relates to the technical field of mobile phone shells, in particular to a rare earth cast aluminum alloy mobile phone shell and a preparation method thereof.
Background
At present, the application of aluminium and its alloy is extensive, after 5 series, 6 series and 7 series deformed aluminium alloy is undergone the processes of casting, extruding or rolling, heat treatment, machining and polishing, it can obtain good strength, at the same time, it also has very high smoothness and brightness, and after anodic oxidation and colouring, it can obtain the invented product with beautiful colour and glorious colour. Due to the excellent characteristics of the aluminum alloy, the aluminum alloy is widely applied to smart phone shell materials in recent years, the aluminum alloy mobile phone shell is generally made of extruded or rolled aluminum alloy as a blank, and then is finished through a series of complex processing procedures such as CNC (computerized numerical control) processing, nano injection molding, finish milling, polishing, sand blasting, primary oxidation, secondary oxidation, hot melting of nuts and the like, the required time is long, the production cost is high, the quality of the aluminum alloy material has great influence on the processing yield of the aluminum alloy mobile phone shell, and the defects of material lines, black points and black lines after the material is processed and oxidized are the most common defects.
With the increasing demand of the market on the surface quality of the aluminum mobile phone shell, the demand on the surface of the aluminum alloy material after anodic oxidation is almost zero defect, and meanwhile, under the strong market competition, the cost reduction of the mobile phone shell material is the most important factor. At present, the cost of producing the mobile phone shell by adopting the wrought aluminum alloy is higher, the mobile phone shell is produced by casting the aluminum alloy, the processing procedures are reduced, the production efficiency is improved, and the production cost is reduced. However, the conventional cast aluminum alloy such as Al-Si cast aluminum alloy has low strength, poor plasticity, large anode oxidation color difference, and even anode oxidation failure, in addition, the die-cast aluminum alloy product has dense air holes and oxidation inclusion defects, obvious material lines, dense black points and black lines defects appear after anode oxidation, the yield is low, and market requirements cannot be met.
Disclosure of Invention
One of the purposes of the invention is to provide a rare earth cast aluminum alloy mobile phone shell aiming at the defects of the prior art, the rare earth cast aluminum alloy mobile phone shell has the advantages of excellent anodic oxidation performance, no material lines, black points or black line defects, few processing procedures, low cost and high yield.
The second purpose of the invention is to provide a preparation method of the rare earth cast aluminum alloy mobile phone shell aiming at the defects of the prior art.
In order to achieve one of the purposes, the invention adopts the following technical scheme:
the rare earth cast aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
preferably, the rare earth cast aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
more preferably, the rare earth cast aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
in order to achieve the second purpose, the invention adopts the following technical scheme:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, and then charging into a furnace for heating and melting to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner into the aluminum alloy melt obtained in the step one, and then carrying out refining degassing and refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and (4) carrying out die-casting, machining and surface treatment on the alloy melt obtained in the step two to obtain the rare earth cast aluminum alloy mobile phone shell.
In the technical scheme, in the first step, Si, Fe, Mg, Mn, Sc and Al in the formula amount are mixed and then are put into a furnace to be heated and melted for 5-8 hours at the temperature of 720-740 ℃, and the molten aluminum alloy is obtained.
In the technical scheme, in the second step, 1.2-2.0 kg/tAl of Ti-containing refiner is added into the aluminum alloy melt obtained in the first step, and then the thickness of the refiner is 2.0-3.0 m3Introducing inert gas at the flow rate of 720-750 ℃, refining and degassing for 8-12 min, and then carrying out refining modification treatment to obtain the alloy melt.
In the technical scheme, in the third step, the alloy melt obtained in the second step is subjected to die casting at 690-710 ℃, and then is subjected to machining and surface treatment, so that the rare earth cast aluminum alloy mobile phone shell is obtained.
Specifically, the Ti-containing refiner is a filiform refiner and is one or a composition of Al-3Ti-C refiner and Al-5Ti-0.2B refiner.
The invention has the beneficial effects that:
the invention provides a rare earth cast aluminum alloy mobile phone shell which is prepared from raw materials including Si, Fe, Mg, Mn, Sc, Ti and Al through heating, melting, refining, degassing, refining, modifying, die casting, machining and surface treatment. This tombarthite casting aluminum alloy cell-phone shell uses the aluminum alloy that contains Sc as the raw materials, and tombarthite metal Sc has stronger chemical activity, uses the aluminum alloy that contains Sc to have better stamping forming performance and easy cutting process for the cell-phone shell of raw materials casting, and the easy oxidation of positive pole after the machining for cell-phone shell tissue is fine and close, thereby makes the casing have higher hardness, corrosion resistance and excellent surface property, material line and black dot, black line defect can not appear. In addition, the rare earth cast aluminum alloy mobile phone shell has the advantages of few preparation procedures, low cost and high yield, is suitable for large-scale production, popularization and application, and has good economic benefit and market application prospect.
Drawings
Fig. 1 is a metallographic electron micrograph of a rare earth cast aluminum alloy mobile phone case prepared in example 1 of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a metallographic electron microscope photograph of the rare earth cast aluminum alloy mobile phone case prepared in embodiment 2 of the present invention.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a metallographic electron micrograph of the rare earth cast aluminum alloy mobile phone case prepared in example 3 of the present invention.
Fig. 6 is a partially enlarged view of fig. 5.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1.
A rare earth casting aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, then charging into a furnace, and heating and melting for 6.5 hours at the temperature of 730 ℃ to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner 1.6kg/tAl into the aluminum alloy melt obtained in the step one, and then adding the refiner at a speed of 2.5m3Introducing inert gas at the flow rate of/h, refining and degassing for 10min at 735 ℃, and then carrying out refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and (4) die-casting the alloy melt obtained in the step two at 700 ℃, and then machining and surface treating to obtain the rare earth cast aluminum alloy mobile phone shell.
In this example, the Ti-containing refiner was a filamentous refiner, which was a composition of an Al-3Ti-C refiner and an Al-5Ti-0.2B refiner.
Example 2.
A rare earth casting aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, then charging into a furnace, and heating and melting for 7 hours at 725 ℃ to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding 1.4kg/tAl Ti-containing refiner into the aluminum alloy melt obtained in the step one, and then adding the refiner into the aluminum alloy melt at a speed of 2.3m3Introducing inert gas at a flow rate of/h, refining and degassing for 11min at 727 ℃, and then carrying out refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and die-casting the alloy melt obtained in the second step at 695 ℃, and then machining and performing surface treatment to obtain the rare earth cast aluminum alloy mobile phone shell.
In this example, the Ti-containing refiner was an Al-3Ti-C refiner.
Example 3.
A rare earth casting aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, and then charging into a furnace to heat and melt for 6 hours at 735 ℃ to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner 1.8kg/tAl into the aluminum alloy melt obtained in the step one, and then adding the refiner at a speed of 2.7m3Introducing inert gas at the flow rate of/h, refining and degassing for 9min at the temperature of 743 ℃, and then carrying out refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and die-casting the alloy melt obtained in the step two at 705 ℃, and then machining and performing surface treatment to obtain the rare earth cast aluminum alloy mobile phone shell.
In this example, the Ti-containing refiner was Al-5Ti-0.2B refiner.
Example 4.
A rare earth casting aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, then charging into a furnace, and heating and melting for 8 hours at 720 ℃ to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner 1.2kg/tAl into the aluminum alloy melt obtained in the step one, and then adding the refiner at 2.0m3With inert gas being introduced at a flow rate of 720 DEG CRefining and degassing for 12min under the condition, and then carrying out refining and modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and die-casting the alloy melt obtained in the step two at 690 ℃, and then machining and performing surface treatment to obtain the rare earth cast aluminum alloy mobile phone shell.
In this example, the Ti-containing refiner was an Al-3Ti-C refiner.
Example 5.
A rare earth casting aluminum alloy mobile phone shell comprises the following raw materials in parts by weight:
the preparation method of the rare earth cast aluminum alloy mobile phone shell comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, then charging into a furnace, and heating and melting for 5 hours at the temperature of 740 ℃ to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner of 2.0kg/tAl into the aluminum alloy melt obtained in the step one, and then adding the refiner of 3.0m3Introducing inert gas at the flow rate of/h, refining and degassing for 8min at the temperature of 750 ℃, and then carrying out refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and die-casting the alloy melt obtained in the step two at 710 ℃, and then machining and performing surface treatment to obtain the rare earth cast aluminum alloy mobile phone shell.
In this example, the Ti-containing refiner was Al-5Ti-0.2B refiner.
Experiment of
The rare earth cast aluminum alloy mobile phone shells prepared in examples 1 to 3 were subjected to three hardness tests, and the test results are as follows:
it can be known from the table above, the hardness of rare earth casting aluminum alloy cell-phone shell is more than 65, and hardness 55 in comparison with ordinary aluminum alloy cell-phone shell has showing the improvement, this because rare earth metal Sc has stronger chemical activity, uses the aluminum alloy that contains Sc to have better stamping forming performance and easy cutting process for the cell-phone shell of raw materials casting, and the easy oxidation of positive pole after the machining for cell-phone shell tissue is fine and close, thereby makes the casing have higher hardness.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides a tombarthite casting aluminum alloy cell-phone shell which characterized in that: the composite material comprises the following raw materials in parts by weight:
2. a rare earth cast aluminium alloy handset casing according to claim 1, wherein: the composite material comprises the following raw materials in parts by weight:
3. a rare earth cast aluminium alloy handset casing according to claim 1, wherein: the composite material comprises the following raw materials in parts by weight:
4. a method of making a rare earth cast aluminium alloy handset casing as claimed in any one of claims 1 to 3, wherein: it comprises the following steps:
step one, preparing aluminum alloy melt: mixing Si, Fe, Mg, Mn, Sc and Al according to the formula ratio, and then charging into a furnace for heating and melting to obtain an aluminum alloy melt;
step two, preparing an alloy melt: adding a Ti-containing refiner into the aluminum alloy melt obtained in the step one, and then carrying out refining degassing and refining modification treatment to obtain an alloy melt;
step three, preparing the mobile phone shell: and (4) carrying out die-casting, machining and surface treatment on the alloy melt obtained in the step two to obtain the rare earth cast aluminum alloy mobile phone shell.
5. The method of manufacturing a rare earth cast aluminum alloy mobile phone case of claim 4, wherein: in the first step, Si, Fe, Mg, Mn, Sc and Al in a formula amount are mixed and then are put into a furnace to be heated and melted for 5-8 hours at the temperature of 720-740 ℃, and the molten aluminum alloy is obtained.
6. The method of manufacturing a rare earth cast aluminum alloy mobile phone case of claim 4, wherein: in the second step, 1.2-2.0 kg/tAl of Ti-containing refiner is added into the aluminum alloy melt obtained in the first step, and then the thickness of the refiner is 2.0-3.0 m3Introducing inert gas at the flow rate of 720-750 ℃, refining and degassing for 8-12 min, and then carrying out refining modification treatment to obtain the alloy melt.
7. The method of manufacturing a rare earth cast aluminum alloy mobile phone case of claim 4, wherein: and in the third step, die-casting the alloy melt obtained in the second step at 690-710 ℃, and then machining and surface treating to obtain the rare earth cast aluminum alloy mobile phone shell.
8. The method of manufacturing a rare earth cast aluminum alloy mobile phone case of claim 4, wherein: the Ti-containing refiner is a filiform refiner and is one or a composition of Al-3Ti-C refiner and Al-5Ti-0.2B refiner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112076.9A CN111378880A (en) | 2020-02-24 | 2020-02-24 | Rare earth cast aluminum alloy mobile phone shell and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112076.9A CN111378880A (en) | 2020-02-24 | 2020-02-24 | Rare earth cast aluminum alloy mobile phone shell and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111378880A true CN111378880A (en) | 2020-07-07 |
Family
ID=71221511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010112076.9A Pending CN111378880A (en) | 2020-02-24 | 2020-02-24 | Rare earth cast aluminum alloy mobile phone shell and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111378880A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548069A (en) * | 2020-11-04 | 2021-03-26 | 深圳市众诚达应用材料科技有限公司 | Preparation method of aluminum-scandium alloy target material |
| CN112646991A (en) * | 2020-12-31 | 2021-04-13 | 广东润华轻合金有限公司 | High-strength and high-surface aluminum alloy for mobile phone shell and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0918095A1 (en) * | 1997-11-20 | 1999-05-26 | Alusuisse Technology & Management AG | Structural element made of a die-cast aluminium alloy |
| CN107841663A (en) * | 2017-11-01 | 2018-03-27 | 西南铝业（集团）有限责任公司 | A kind of 5A06 rodss and bars of aluminium alloy of optimizing components and preparation method thereof |
| CN108977677A (en) * | 2018-08-02 | 2018-12-11 | 鹰普航空零部件（无锡）有限公司 | The metamorphism treatment method of aluminium alloy in a kind of low pressure casting process |
-
2020
- 2020-02-24 CN CN202010112076.9A patent/CN111378880A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0918095A1 (en) * | 1997-11-20 | 1999-05-26 | Alusuisse Technology & Management AG | Structural element made of a die-cast aluminium alloy |
| CN107841663A (en) * | 2017-11-01 | 2018-03-27 | 西南铝业（集团）有限责任公司 | A kind of 5A06 rodss and bars of aluminium alloy of optimizing components and preparation method thereof |
| CN108977677A (en) * | 2018-08-02 | 2018-12-11 | 鹰普航空零部件（无锡）有限公司 | The metamorphism treatment method of aluminium alloy in a kind of low pressure casting process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548069A (en) * | 2020-11-04 | 2021-03-26 | 深圳市众诚达应用材料科技有限公司 | Preparation method of aluminum-scandium alloy target material |
| CN112548069B (en) * | 2020-11-04 | 2022-06-03 | 深圳市众诚达应用材料科技有限公司 | Preparation method of aluminum-scandium alloy target material |
| CN112646991A (en) * | 2020-12-31 | 2021-04-13 | 广东润华轻合金有限公司 | High-strength and high-surface aluminum alloy for mobile phone shell and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111334690B (en) | New energy automobile battery tray high-strength aluminum alloy section and preparation method thereof | |
| CN101880802B (en) | Al-Mg series high magnesium aluminum alloy for automobile body plate and manufacturing method thereof | |
| CN103834836A (en) | Die-casting forging aluminum alloy and production method thereof | |
| CN114231799B (en) | Non-heat-treatment high-toughness die-casting aluminum-silicon alloy and preparation method thereof | |
| CN106756672B (en) | A kind of processing method of raising automobile using Al Mg Si Cu systems alloy strength | |
| CN105220040A (en) | A kind of Al-Zn-Mg alloy and preparation method thereof and application | |
| CN111378880A (en) | Rare earth cast aluminum alloy mobile phone shell and preparation method thereof | |
| CN111270109B (en) | Method for producing 8021 aluminum alloy soft packaging foil for lithium battery by cast rolling method | |
| CN102676892A (en) | 6410 aluminium alloy and preparation method and application of 6410 aluminium alloy | |
| CN112853161A (en) | Aluminum alloy coiled material suitable for new energy automobile chassis lightweight technology and preparation method thereof | |
| CN109082566A (en) | A kind of mobile phone frame is alloy Aluminum Plate and Strip and preparation method thereof with 6 | |
| CN114086040A (en) | Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof | |
| CN112126823A (en) | Low-lug-making low-hardness capacitor shell and preparation method thereof | |
| CN112853172B (en) | Ultralow-density aluminum-lithium alloy and preparation method thereof | |
| CN113881877A (en) | Aluminum alloy strip and preparation method and application thereof | |
| CN108531756A (en) | A kind of production technology improving brass material tensile strength and crystal grain refinement | |
| CN113174515A (en) | High-toughness aluminum alloy and preparation method thereof | |
| CN115652151B (en) | 6xxx series aluminum alloy plate suitable for hot stamping forming formability integrated process, and preparation method and application thereof | |
| CN107557625A (en) | A kind of new-energy automobile high tenacity Aluminum Plate and Strip and its production method | |
| CN109338174B (en) | Preparation method of aluminum alloy material | |
| CN111172439A (en) | Refined grain magnesium alloy and preparation method thereof | |
| CN114703404B (en) | Aluminum foil material for low-density pinhole current collector of new energy lithium battery and preparation method of aluminum foil material | |
| CN114351019B (en) | Aluminum alloy material and preparation method and application thereof | |
| CN109371301A (en) | A kind of room temperature high plastic magnesium alloy and preparation method thereof | |
| CN110016595B (en) | Aluminum alloy foil and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 523000, No. two, 8 Fu Road, Southern China Industrial Park, Liaobu Town, Guangdong, Dongguan Applicant after: Guangdong Runhua Light Alloy Co.,Ltd. Address before: No.8, Jinfu 2nd Road, South China Industrial Zone, Liaobu Town, Dongguan City, Guangdong Province Applicant before: Guangdong Runhua Material Technology Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200707 |