CN110125352A - A kind of zinc alloy belt material progressive forming method - Google Patents
A kind of zinc alloy belt material progressive forming method Download PDFInfo
- Publication number
- CN110125352A CN110125352A CN201910301648.5A CN201910301648A CN110125352A CN 110125352 A CN110125352 A CN 110125352A CN 201910301648 A CN201910301648 A CN 201910301648A CN 110125352 A CN110125352 A CN 110125352A
- Authority
- CN
- China
- Prior art keywords
- zinc alloy
- roll
- belt material
- kirsite
- alloy belt
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
Abstract
A kind of zinc alloy belt material progressive forming method, it is related to a kind of sheet alloy manufacturing process, the invention firstly uses magnetic suspension foundry engieerings to be prepared into metal bath for kirsite, then metal bath is poured into the chute around with cooling water and obtains semi-solid-state metal, last semi-solid-state metal enters in the type chamber formed by two rolls, the flow of cooling water is 5-25L/min, and the revolving speed of roll is set as 5-20r/min.Make in the temperature of the metal belt of roll front end at 150-300 DEG C, the zinc alloy belt material prepared directly is curled into disk；Preparation method of the invention combines the magnetic suspension casting of kirsite with rolling technique, and the cost realized truly is low, and process is short, near net shape production.
Description
Technical field
The present invention relates to a kind of sheet alloy manufacturing process, more particularly to a kind of zinc alloy belt material progressive forming side
Method.
Background technique
Kirsite is due to, good fluidity low with fusing point, and wearability is good, and corrosion resistance is strong, is easily brazed, and melting welding and easy plasticity become
The features such as shape, and it is widely used in atmospheric corrosion resistance, hardware, electronics, medical and automobile and other industries.Cast zinc alloy has good
Good mobility and corrosion resistance, is suitable for die casting, auto parts shell etc., but there are intensity is not high, plasticity difference and defect
More problem.And cast zinc alloy can be improved the intensity and modeling of kirsite by some plastic deformation and heat treatment process
Property, but the manufacturing method for preparing zinc alloy belt material conventional at present is mainly ingot casting-rolling mill practice, there are process flows
The problems such as length, processing efficiency is low, this is because most of kirsites have close-packed hexagonal structure, it is difficult to which plasticity becomes at room temperature
Shape.So far, the zinc alloy belt material process flow generallyd use both at home and abroad are as follows: continuously or semi-continuously cast zinc alloy is cast
Ingot, while multi- pass rolling is carried out by being put into milling train after kirsite reheating.Therefore, there are processes for this kind of manufacturing method
It is long, at high cost, the problems such as energy consumption is high, and production efficiency is low.
There is scholar to propose method production zinc and kirsite Bar Wire Product using continuous casting and extrusion recently, but due to die size
Limitation, can not prepare the Strip of kirsite.Progressive forming technology currently used for metal plates and strips is mainly continuous casting and rolling,
Its there are roll casting speeds slow, low efficiency, product structure property is poor, and for edge there are crackle and device structure are complicated, control difficulty is big
The problems such as.
And the continuous casting and rolling forming technique to grow up on continuously casting and continuously rolling technology, directly liquid metal continuously can be cast
It makes and is integrated with roll forming technology, realize the integration and serialization of forming, belong to short route, efficient advanced preparation skill
Art, and in aluminium alloy, magnesium alloy has been applied successfully, but the application to the technology in the Strip processing of kirsite, not yet
Report.
Summary of the invention
The purpose of the present invention is to provide a kind of zinc alloy belt material progressive forming method, zinc alloy belt material of the present invention connects
Continuous casting forming, and liquid zinc alloy is directly continuously prepared to high-performance zinc alloy Strip；The present invention can continuous production institute
The Strip that need to be grown can only have great application prospect compared with the limited product of production length when tradition rolling.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of zinc alloy belt material progressive forming method, the method using magnetic induction coil, the chute of water cooling, water cooling roll
It is process with the progressive forming equipment of pedestal composition；
It carries out: first casting the kirsite prepared according to the magnetic suspension that certain sequence is added to 500-600 DEG C in accordance with the following steps
It makes in furnace, is 10-40A in electric current, the argon gas protection that pressure is 10MPa is lower to carry out melting, secondly arrives kirsite melt cast
In chute, wherein chute cooling water flow is 10-30L/min, finally makes the kirsite at 150-300 DEG C of roll head temperature
Solution enters the zinc alloy belt material prepared in the type chamber formed by two rolls and is directly curled into disk, and wherein roll is cold
But the flow of water is 5-25L/min, and the revolving speed of roll is set as 5-20r/min.
A kind of zinc alloy belt material progressive forming method, the kirsite add metallic aluminium, metallic copper, metal
One or more of manganese, metallic tin, bismuth metal and metallic silver.
A kind of zinc alloy belt material progressive forming method, the roll preheating temperature are 100-150 DEG C.
A kind of zinc alloy belt material progressive forming method, the gap between two roll are 0.1-10mm.
A kind of zinc alloy belt material progressive forming method, the zinc alloy plate or band with a thickness of 0.2-
9mm。
The advantages and effects of the present invention are:
The present invention realizes the forming of zinc alloy belt material continuous casting and rolling for the first time, and liquid zinc alloy is directly continuously prepared to high property
It can zinc alloy belt material；With conventional cast zinc alloy ingot casting, roughing, reheating, rolling mill practice method is compared, using even
Continuous casting forming technology cost-saved 35% or more, reduces by 50% or more energy consumption；Method of the invention solves production zinc at present
The problems such as alloy plate strip process flow is long, and the device is complicated, and investment is big, and energy consumption is high；The present invention theoretically can continuous production it is unlimited
Long Strip can only have great application prospect compared with the limited product of production length when tradition rolling.
Detailed description of the invention
Fig. 1 is continuous casting and rolling device structure schematic diagram of the present invention；
Fig. 2 is the pictorial diagram of zinc alloy plate product in present example 1；
Fig. 3 is the room temperature tensile properties curve graph of zinc alloy plate product in present example 1；
Fig. 4 is the scanning tissue displaing micro photo figure of zinc alloy plate product in present example 1.
Specific embodiment
The following describes the present invention in detail with reference to examples.
The method of the present invention includes smelting metal and continuous casting and rolling, melting uses electromagnetic induction heating technology.Continuous casting and rolling
The equipment used is continuous casting & rolling line, and for continuous casting & rolling line by motor, speed reducer and host composition, host mainly includes chute, is rolled
Roller, hydraulic cylinder and pedestal, sequentially include the following steps:
1. using electric current for 20-40A, pure metal zinc is heated to 450-500 DEG C using electromagnetic induction heating technology, to whole gold
After belonging to fusing, magnesium metal, copper, bismuth, tin, manganese or silver-colored one or more are sequentially added, after whole metal moltens, are stirred to mixed
It closes uniformly, heat preservation stands 10-30min, obtains kirsite melt.
Above-mentioned kirsite composition range is as follows: it is by weight percentage Al 0 ~ 50%, Cu 0 ~ 10%, Mg 0 ~ 2%, Sn 0
~ 20%, Ag 0 ~ 10%, Mn 0 ~ 3%, Bi 0 ~ 2%, wherein alloying element can be one or more, surplus Zn；
2. using continuous casting & rolling line, kirsite melt is poured into the type chamber formed between two rolls by chute, cooling water
Flow be 5-25L/min, the revolving speed of roll is set as 5-20r/min.Prepare zinc alloy belt material with a thickness of 0.2-
9mm.Lead to cooling water to two rolls when continuous casting and rolling, makes 150 ~ 300 DEG C of sections of metal temperature in rolling type chamber, control is rolled
Roller speed, the surface defects such as keep zinc alloy belt material surface not cracked.
The application method of continuous casting and rolling are as follows: starting casting and rolling machine, the revolving speed for adjusting roll is 5-20r/min, and dally 3min, together
When to adjust gap between two rolls be 0.1-10mm, above-mentioned kirsite melt cast is formed to two rolls by chute
In type chamber, wherein the cooling water of chute is 5-25L/min, and leads to cooling water to roll, and the flow of cooling water is 10 ~ 30L/min,
Come equilibrium freezing heat and deformation heat, make to be poured into 150 ~ 300 DEG C of actual temperature after the intracavitary solidification of metal melt of type, to protect
The zinc alloy belt material prepared is demonstrate,proved not because the surface defects such as periodical crackle occurs in overheat；After melt casting, adjustment
Roll rotational speed is 2r/min or so, and adjusting the gap between two rolls is 10mm, closes motor later and stalls roll, at this time after
Continuous logical 5 ~ 8min of cooling water, stops cooling, closes power supply.
Metallic zinc purity by weight >=99.9% used in present example, the purity by weight of metallic aluminium are >=99.9%, gold
Belong to magnesium purity by weight >=99.95%, the purity by weight of metallic copper is >=99.8%, metallic tin purity by weight >=99.9%, bismuth metal
Purity by weight is >=99.9%, manganese metal purity by weight >=99.7%, and the purity by weight of metallic silver is >=99.99%.
Zinc alloy belt material prepared by the present invention with a thickness of 0.2-9mm.
Embodiment 1
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 25A adds metallic aluminium, to whole
Heat preservation stands 10min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 22% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 10L/min, and the revolving speed of roll is 8r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 15L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 5mm at 250 DEG C or so in type chamber；
Continuous casting & rolling line schematic diagram used by final as shown in Figure 1, casting zinc alloy belt photo in kind as shown in Figure 1,
The scanning microscopic structure of the plate is as shown in figure 3, its mechanical property result is as shown in Figure 4；
The zinc alloy plate tensile strength of acquisition is 252MPa, elongation percentage 53%.
Embodiment 2
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 20A adds manganese metal, to whole
Heat preservation stands 10min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 1% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 8L/min, and the revolving speed of roll is 10r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 12L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 3mm at 200 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 186MPa, elongation percentage 42%.
Embodiment 3
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 30A adds metallic copper, to whole
Heat preservation stands 15min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 3.8% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 12L/min, and the revolving speed of roll is 12r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 20L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 2mm at 300 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 212MPa, elongation percentage 15%.
Embodiment 4
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 18A adds metallic tin, to whole
Heat preservation stands 20min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 2% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 10L/min, and the revolving speed of roll is 12r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 15L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 6mm at 150 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 192MPa, elongation percentage 26%.
Embodiment 5
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 28A adds metallic aluminium, manganese metal,
Metal, heat preservation stands 12min after whole metal moltens；Obtain kirsite melt, it is desirable that its ingredient Al by weight percentage
15%, Mn 0.5%, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 12L/min, and the revolving speed of roll is 9r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 18L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 2mm at 220 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 182MPa, elongation percentage 64%.
Embodiment 6
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 25A adds magnesium metal, to whole
Heat preservation stands 8min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 0.5% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 15L/min, and the revolving speed of roll is 10r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 25L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 7mm at 180 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 226MPa, elongation percentage 15%.
Embodiment 7
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 28A adds manganese metal, metallic copper,
Heat preservation stands 20min after whole metal moltens；Obtain kirsite melt, it is desirable that its ingredient is Mn 1%, copper by weight percentage
0.8%, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 12L/min, and the revolving speed of roll is 15r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 12L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 4mm at 300 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 193MPa, elongation percentage 24%.
Embodiment 8
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 30A adds metallic silver, to whole
Heat preservation stands 10min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 2% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 8L/min, and the revolving speed of roll is 10r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 15L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 6mm at 280 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 202MPa, elongation percentage 18%.
Embodiment 9
Metallic zinc is all melted using electromagnetic induction heating technology, then electric current 29A adds bismuth metal, to whole
Heat preservation stands 15min after metal molten；Obtain kirsite melt, it is desirable that its ingredient is 1.6% by weight percentage, surplus Zn；
Using continuous casting & rolling line, kirsite melt is poured into the type chamber between two rolls by chute, the cooling water flow of chute
Amount is 20L/min, and the revolving speed of roll is 12r/min, and when casting is cooling to roll water flowing, and the flow of cooling water is 10L/min, is made
Metal temperature prepares zinc alloy plate of the thickness without 2.8mm at 210 DEG C or so in type chamber；
The zinc alloy plate tensile strength of acquisition is 178MPa, elongation percentage 21%.
Claims (5)
1. a kind of zinc alloy belt material progressive forming method, which is characterized in that the method utilizes magnetic induction coil, the stream of water cooling
The progressive forming equipment of slot, the roll of water cooling and pedestal composition is process；
It carries out: first casting the kirsite prepared according to the magnetic suspension that certain sequence is added to 500-600 DEG C in accordance with the following steps
It makes in furnace, is 10-40A in electric current, the argon gas protection that pressure is 10MPa is lower to carry out melting, secondly arrives kirsite melt cast
In chute, wherein chute cooling water flow is 10-30L/min, finally makes the kirsite at 150-300 DEG C of roll head temperature
Solution enters the zinc alloy belt material prepared in the type chamber formed by two rolls and is directly curled into disk, and wherein roll is cold
But the flow of water is 5-25L/min, and the revolving speed of roll is set as 5-20r/min.
2. a kind of zinc alloy belt material progressive forming method according to claim 1, which is characterized in that the kirsite adds
Add one or more of metallic aluminium, metallic copper, manganese metal, metallic tin, bismuth metal and metallic silver.
3. a kind of zinc alloy belt material progressive forming method according to claim 1, which is characterized in that the roll preheating
Temperature is 100-150 DEG C.
4. a kind of zinc alloy belt material progressive forming method according to claim 1, which is characterized in that two roll it
Between gap be 0.1-10mm.
5. a kind of zinc alloy belt material progressive forming method according to claim 1, which is characterized in that the kirsite plate
Material or band with a thickness of 0.2-9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910301648.5A CN110125352A (en) | 2019-04-16 | 2019-04-16 | A kind of zinc alloy belt material progressive forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910301648.5A CN110125352A (en) | 2019-04-16 | 2019-04-16 | A kind of zinc alloy belt material progressive forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110125352A true CN110125352A (en) | 2019-08-16 |
Family
ID=67570014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910301648.5A Pending CN110125352A (en) | 2019-04-16 | 2019-04-16 | A kind of zinc alloy belt material progressive forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110125352A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2228000Y (en) * | 1995-09-26 | 1996-05-29 | 东北大学 | Continuous casting and extruding machine of aluminium alloy |
| JP2005262237A (en) * | 2004-03-16 | 2005-09-29 | Toyota Motor Corp | Apparatus and method for producing metal sheet |
| CN102814478A (en) * | 2012-08-02 | 2012-12-12 | 东北大学 | Preparation method for continuously forming zinc and zinc alloy pipe, bar or wire |
| CN103722139A (en) * | 2013-09-26 | 2014-04-16 | 河南科技大学 | Semi-solid slurrying device and composite board manufacturing device using semi-solid slurrying device |
| CN106493316A (en) * | 2016-12-20 | 2017-03-15 | 东北大学 | Vertical type semi-solid casting and rolling device and casting-rolling method |
| CN108246993A (en) * | 2018-01-18 | 2018-07-06 | 中北大学 | A kind of aluminium alloy semi-solid casting-rolling method |
-
2019
- 2019-04-16 CN CN201910301648.5A patent/CN110125352A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2228000Y (en) * | 1995-09-26 | 1996-05-29 | 东北大学 | Continuous casting and extruding machine of aluminium alloy |
| JP2005262237A (en) * | 2004-03-16 | 2005-09-29 | Toyota Motor Corp | Apparatus and method for producing metal sheet |
| CN102814478A (en) * | 2012-08-02 | 2012-12-12 | 东北大学 | Preparation method for continuously forming zinc and zinc alloy pipe, bar or wire |
| CN103722139A (en) * | 2013-09-26 | 2014-04-16 | 河南科技大学 | Semi-solid slurrying device and composite board manufacturing device using semi-solid slurrying device |
| CN106493316A (en) * | 2016-12-20 | 2017-03-15 | 东北大学 | Vertical type semi-solid casting and rolling device and casting-rolling method |
| CN108246993A (en) * | 2018-01-18 | 2018-07-06 | 中北大学 | A kind of aluminium alloy semi-solid casting-rolling method |
Non-Patent Citations (1)
| Title |
|---|
| 薛正良等: "《特种熔炼》", 31 October 2018, 冶金工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102260840B (en) | Short-flow efficient production method for brass tubes | |
| CN106601324B (en) | A kind of high bond strength Copper-Aluminum compound conductive material and preparation method thereof | |
| CN101966564B (en) | Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof | |
| CN102876939B (en) | Manufacturing method of aluminum magnesium alloy | |
| CN101269406B (en) | Continuous casting technique for aluminum alloy thin belt blank | |
| CN104342575A (en) | Electrified railway chromium-zirconium-copper contact line and machining process thereof | |
| CN109048222B (en) | Production method of 3005-H16 aluminum alloy plate strip | |
| CN100507042C (en) | Copper-aluminum-manganese-beryllium memory superelasticity alloy and producing method thereof | |
| CN110373560B (en) | Method for producing high-performance aluminum alloy plate strip by continuous casting and rolling of thin slab | |
| CN105755334A (en) | Aluminum foil used for 6811 alloy automotive radiator and preparing method thereof | |
| CN108385001A (en) | A kind of preparation method of 5356 aluminium alloy welding wire | |
| CN106636731A (en) | Processing technology for high-strength and high-extensibility brass alloy strip | |
| CN109967703B (en) | Method for continuously and efficiently preparing wide amorphous thin strip with thickness of 80-1500 mu m at high cooling speed | |
| CN104550306A (en) | Method for producing strips for aluminum flat tubes for automobile radiator made of 3003 alloy by casting and rolling method | |
| CN111690855A (en) | Aluminum alloy extrusion material for bearing block and manufacturing method thereof | |
| CN101704020A (en) | Method for producing aluminum alloy complex plate strip foil blank for brazing heat exchanger | |
| CN101890485A (en) | Continuous casting and extrusion forming method for magnesium alloy bar/wire rod | |
| WO2009094857A1 (en) | Reverse temperature field rolling method for mg alloy sheet | |
| CN115591941B (en) | Deep-cooling auxiliary wave flattening solid-liquid cast-rolling composite equipment and method for bimetal composite plate strip | |
| CN110125352A (en) | A kind of zinc alloy belt material progressive forming method | |
| CN108405651B (en) | A kind of semisolid continuous extrusion production copper alloy wire method | |
| CN105568071A (en) | High-strength high-elongation aluminum foil for air-conditioner and manufacturing method of such aluminum foil | |
| CN110541888A (en) | Oil-cooled bearing seat and machining method thereof | |
| CN114101612B (en) | Preparation method of jet-cast high-performance 7XXX aluminum alloy thin strip | |
| CN103602886B (en) | A kind of twin-roll thin strip continuous casting prepares the method for 1.5mm level Fe-Si alloy strip |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190816 |
|
| RJ01 | Rejection of invention patent application after publication |