CN110976854A - Sintering device for powder metallurgy based on amorphous nanocrystalline material - Google Patents

Sintering device for powder metallurgy based on amorphous nanocrystalline material Download PDF

Info

Publication number
CN110976854A
CN110976854A CN201911286783.3A CN201911286783A CN110976854A CN 110976854 A CN110976854 A CN 110976854A CN 201911286783 A CN201911286783 A CN 201911286783A CN 110976854 A CN110976854 A CN 110976854A
Authority
CN
China
Prior art keywords
tank
fixedly connected
sintering
tank body
powder metallurgy
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.)
Withdrawn
Application number
CN201911286783.3A
Other languages
Chinese (zh)
Inventor
程敬卿
薛卫昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhu Dingheng Material Technology Co ltd
Original Assignee
Wuhu Dingheng Material Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhu Dingheng Material Technology Co ltd filed Critical Wuhu Dingheng Material Technology Co ltd
Priority to CN201911286783.3A priority Critical patent/CN110976854A/en
Publication of CN110976854A publication Critical patent/CN110976854A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/003Apparatus, e.g. furnaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/005Loading or unloading powder metal objects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12Both compacting and sintering
    • B22F3/14Both compacting and sintering simultaneously

Abstract

The invention relates to the technical field of powder metallurgy processing, in particular to a sintering device for powder metallurgy based on an amorphous nanocrystalline material. According to the invention, by arranging the heating pipe and the pressure pump, the powder raw material is sintered in a high-temperature and high-pressure environment, the processing quality of the sintered metal object is higher by utilizing the processing principle of the amorphous nanocrystalline material, the cover plate and the tank body are more firmly abutted by arranging the abutting mechanism, the tank body is turned over by arranging the turning mechanism, the smelted raw material is convenient to pour out from the sintering tank along the guide chute, the processed product is more convenient to take out, the labor is saved, and the processing efficiency is improved.

Description

Sintering device for powder metallurgy based on amorphous nanocrystalline material
Technical Field
The invention relates to the technical field of powder metallurgy processing, in particular to a sintering device for powder metallurgy based on an amorphous nanocrystalline material.
Background
Powder metallurgy is a very useful and common preparation method in part manufacturing, and is a process technology for manufacturing metal materials, composite materials and various types of products by preparing metal or using metal powder as a raw material and forming and sintering the metal materials, and due to the advantages of the powder metallurgy technology, the powder metallurgy becomes a key for solving the problem of new materials and plays a very important role in the development of the new materials, and amorphous nanocrystalline materials are formed by refining the materials under the conditions of high temperature and high pressure.
However, the sintering process in the preparation process of the powder metallurgy part has the defects of long time, high power consumption and the like, air holes are easily stored in the metallurgical metal, the quality of metallurgical processing is influenced, the toughness of the processed metal is influenced, potential safety hazards are brought, and the sintered processed product is troublesome to take out, so that manpower is wasted. Therefore, those skilled in the art have provided a sintering apparatus for powder metallurgy based on amorphous nanocrystalline material to solve the problems set forth in the background art described above.
Disclosure of Invention
The invention aims to provide a sintering device for powder metallurgy based on amorphous nanocrystalline materials, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a sintering device for powder metallurgy based on amorphous nanocrystalline materials comprises a concave frame, a case and a tank body, wherein the case is fixedly connected with one side of the concave frame, the tank body is arranged in the concave frame, a turnover mechanism is arranged in the case, one end of the turnover mechanism penetrates through the case and the concave frame and is fixedly connected with one side of the tank body, the inner wall of one side, away from the case, of the concave frame is rotatably connected with the side wall of the tank body through a first rotating piece, a sintering tank is arranged in the tank body, a support ring is fixedly connected between the sintering tank and the tank body, a heating pipe is sleeved and fixedly connected with the side wall of the sintering tank, a cover plate matched with an opening of the tank body is arranged above the tank body, a tightening mechanism is arranged on the tank body, one end of the tightening mechanism is rotatably connected with the upper side of the cover plate, an air inlet pipe communicated with the sintering tank is arranged on the upper side of the cover, and the air outlet end of the pressure pump and one end of the air inlet pipe far away from the cover plate are communicated through a pipeline.
As a still further scheme of the invention: tilting mechanism is including fixing the step motor at quick-witted incasement bottom, step motor's drive end rotates and is connected with the drive shaft of horizontal setting, and the drive shaft keeps away from step motor's one end fixedly connected with action wheel, quick-witted case and jar lateral wall of the body insert establish and the bull stick that the swivelling joint has horizontal setting, and the one end of bull stick extends to in the quick-witted case and fixedly connected with from the driving wheel, the action wheel passes through the drive belt and is connected with from the driving wheel transmission, the one end and jar body fixed connection from the driving wheel are kept away from.
As a still further scheme of the invention: the machine case is communicated with the side wall of the tank body and is provided with a through hole, and the inner wall of the through hole is rotatably connected with the outer side wall of the rotating rod through a bearing.
As a still further scheme of the invention: support tight mechanism and include two fixed blocks, two the fixed block is located the bilateral symmetry setting of the jar body respectively, and two equal fixedly connected with montants of fixed block upside, two fixedly connected with diaphragm between the montant, the lateral wall of diaphragm is seted up threaded hole, and threaded connection has the threaded rod of vertical setting in the screw hole, the upside of apron rotates through the second and is connected with the lower extreme rotation of threaded rod, and the one end fixedly connected with dog of apron is kept away from to the threaded rod.
As a still further scheme of the invention: the upper side of the cover plate far away from the threaded rod is fixedly connected with a vertically arranged limiting rod, and one end of the limiting rod far away from the cover plate penetrates through the transverse plate and is in sliding connection with the inner wall of the through hole.
As a still further scheme of the invention: the guide chute has all been seted up to the open end of the jar body, the open end of sintering jar and the upside of support ring, be equipped with the cavity in the lateral wall of the jar body, and it has mica thermal insulation material to fill in the cavity.
As a still further scheme of the invention: the heating pipe adopts electric heating pipe, and the heating pipe is spiral coil pipe structure setting.
As a still further scheme of the invention: the lower end side wall of the cover plate is fixedly connected with a protection block net, and an opening of the air inlet pipe is positioned in the protection block net.
Compared with the prior art, the invention has the beneficial effects that:
heating the sintering tank through setting up the heating pipe, and then carry out the pyrometallurgical operation to the powder raw materials in the sintering tank, simultaneously, set up the force (forcing) pump and increase pressure by the intake pipe toward the sintering tank, make the powder raw materials in the sintering tank sinter under the high-temperature and high-pressure environment, utilize amorphous nanocrystalline material's processing principle, make the metal object of sintering more refine, the air content in the material still less, the structure is inseparabler, processingquality is higher, machining efficiency is faster.
Through setting up to tight mechanism, rotate the dog and drive the threaded rod and rotate, because threaded rod and the screw hole threaded connection on the diaphragm, and the axial of diaphragm rotates and receives the restriction of montant, consequently, the threaded rod forces down when rotating, promotes the apron and pushes down and the jar body supports tightly, easy operation, supports tightly firmly, improves the leakproofness, and the closure of the apron of being convenient for.
Through setting up tilting mechanism, start step motor, drive the action wheel and rotate, because the action wheel is connected with the transmission of follow driving wheel, and then drives the bull stick and rotate, realize the upset of the jar body, and then the raw materials of being convenient for to smelt pours out along the baffle box from the sintering jar, and the work of being convenient for more takes out, uses manpower sparingly, improves machining efficiency.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of a heating tube according to the present invention;
FIG. 4 is a schematic top view of the tank of the present invention.
In the figure: 1. a concave frame; 2. a chassis; 3. a tank body; 4. a sintering tank; 5. a support ring; 6. heating a tube; 7. a cover plate; 8. an air inlet pipe; 9. a pressure pump; 10. a stepping motor; 11. a driving wheel; 12. a rotating rod; 13. a driven wheel; 14. a fixed block; 15. a vertical rod; 16. a transverse plate; 17. a threaded rod; 18. a stopper; 19. a limiting rod; 20. a material guide chute; 21. and (4) protecting the barrier net.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, an amorphous nanocrystalline material-based sintering apparatus for powder metallurgy includes a concave frame 1, a case 2, and a tank 3, the case 2 is fixedly connected to one side of the concave frame 1, a support block is fixed to bottoms of the case 2 and the concave frame 1 to perform a stable supporting function, the tank 3 is disposed in the concave frame 1, a turnover mechanism is disposed in the case 2, one end of the turnover mechanism penetrates through the case 2 and the concave frame 1 and is fixedly connected to one side of the tank 3, an inner wall of one side of the concave frame 1 away from the case 2 is rotatably connected to a side wall of the tank 3 through a first rotating member, the supporting tank 3 is more stable when turned over, a sintering tank 4 is disposed in the tank 3, a support ring 5 is fixedly connected between the sintering tank 4 and the tank 3, an open end of the sintering tank 4, and an upper side of the support ring 5 are disposed at, the sealing performance of the sintering tank 4 is improved, a heating pipe 6 is sleeved and fixedly connected on the side wall of the sintering tank 4, a cover plate 7 matched with an opening of the tank is arranged above the tank 3, a tightening mechanism is arranged on the tank 3, one end of the tightening mechanism is rotatably connected with the upper side of the cover plate 7, an air inlet pipe 8 communicated with the sintering tank 4 is arranged on the upper side of the cover plate 7, a pressure pump 9 is fixedly connected on the upper side of the case 2, an air outlet end of the pressure pump 9 and one end, far away from the cover plate 7, of the air inlet pipe 8 are communicated through a pipeline, the pipeline adopts a hose and can be bent, the heating pipe 6 is started to heat the sintering tank 4, so that the powder raw material in the sintering tank 4 is smelted at high temperature, meanwhile, the pressure pump 9 is started to increase the pressure from the air inlet pipe 8 to the sintering tank 4, so that the powder raw material in the sintering, the sintered metal is more refined, the air content in the material is less, the structure is more compact, and the processing quality is higher;
in fig. 2: the turnover mechanism comprises a stepping motor 10 fixed at the bottom in the case 2, the driving end of the stepping motor 10 is rotationally connected with a driving shaft which is transversely arranged, and one end of the driving shaft far away from the stepping motor 10 is fixedly connected with a driving wheel 11, the side walls of the machine case 2 and the tank body 3 are inserted and rotatably connected with a transverse rotating rod 12, one end of the rotating rod 12 extends into the case 2 and is fixedly connected with a driven wheel 13, the driving wheel 11 is in transmission connection with the driven wheel 13 through a transmission belt, one end of the rotating rod 12 far away from the driven wheel 13 is fixedly connected with the tank body 3, the stepping motor 10 is started to drive the driving wheel 11 to rotate, because the driving wheel 11 is in transmission connection with the driven wheel 13, the rotating rod 12 is further driven to rotate, the tank body 3 is turned over, the raw materials convenient for smelting are poured out from the sintering tank 4 along the guide chute 20, so that the processed products can be taken out conveniently, the labor is saved, and the processing efficiency is improved;
in fig. 2: the case 2 is communicated with the side wall of the tank 3 and is provided with a through hole, and the inner wall of the through hole is rotatably connected with the outer side wall of the rotating rod 12 through a bearing, so that the rotating rod 12 can rotate conveniently and can play a supporting role;
in fig. 1 and 2: the abutting mechanism comprises two fixed blocks 14, the two fixed blocks 14 are respectively arranged on two sides of the tank body 3 symmetrically, vertical rods 15 are fixedly connected to the upper sides of the two fixed blocks 14, a transverse plate 16 is fixedly connected between the two vertical rods 15, a threaded hole is formed in the side wall of the transverse plate 16, a vertically arranged threaded rod 17 is in threaded connection with the threaded hole, the upper side of the cover plate 7 is rotatably connected with the lower end of the threaded rod 17 through a second rotating piece, a stop block 18 is fixedly connected to one end, away from the cover plate 7, of the threaded rod 17, the threaded rod 17 is driven to rotate by the rotating stop block 18, the threaded rod 17 is in threaded connection with the threaded hole in the transverse plate 16, and the axial rotation of the transverse plate 16 is limited by the vertical rods 15, so that the threaded rod 17 is forced to move downwards when rotating, the cover plate 7 is pushed, the operation is simple, the support is firm, and the sealing performance is improved;
in fig. 1 and 2: the upper side of the cover plate 7, which is far away from the threaded rod 17, is fixedly connected with a vertically arranged limiting rod 19, and one end of the limiting rod 19, which is far away from the cover plate 7, penetrates through the transverse plate 16 and is in sliding connection with the inner wall of the through hole, so that the cover plate 7 can be prevented from rotating, and the vertical stability of the cover plate 7 during displacement is guaranteed;
in fig. 4: the guide chutes 20 are formed in the open end of the tank body 3, the open end of the sintering tank 4 and the upper side of the support ring 5, so that processing materials can be discharged conveniently, a cavity is formed in the side wall of the tank body 3, mica heat insulation materials are filled in the cavity, a heat insulation effect is achieved, and the outer side of the tank body 3 is prevented from being overheated;
in fig. 3: the heating pipe 6 adopts an electric heating pipe, so that the pollution is avoided, the heating effect is good, the temperature can be controlled, and the heating pipe 6 is arranged in a spiral coil pipe structure, so that the contact area is wide, and the heating speed is high;
in fig. 2: the side wall of the lower end of the cover plate 7 is fixedly connected with a protective barrier 21, and the opening of the air inlet pipe 8 is positioned in the protective barrier 21 to prevent the heated powder raw materials from splashing and burning the air inlet pipe 8.
The working principle of the invention is as follows: when the device is used for powder metallurgy sintering processing, powder raw materials are injected into the sintering tank 4, then the stop block 18 is rotated to drive the threaded rod 17 to rotate, and as the threaded rod 17 is in threaded connection with the threaded hole in the transverse plate 16 and the axial rotation of the transverse plate 16 is limited by the vertical rod 15, the threaded rod 17 is forced to move downwards when rotating, the cover plate 7 is pushed to press downwards and is abutted against the tank body 3, the operation is simple, the abutment is firm, the sealing performance is improved, and a closed space can be formed in the sintering tank 4;
then, a heating pipe 6 is started to heat the sintering tank 4, so that the powder raw material in the sintering tank 4 is subjected to high-temperature smelting, meanwhile, a pressure pump 9 is started to increase the pressure into the sintering tank 4 from an air inlet pipe 8, so that the powder raw material in the sintering tank 4 is sintered in a high-temperature and high-pressure environment, and by utilizing the processing principle of an amorphous nanocrystalline material, the sintered metal is finer, the air content in the material is less, the structure is tighter, the processing quality is higher, and the processing efficiency is higher;
after the sintering is good, start the high pressure that sintering jar 4 was let out to force (forcing) pump 9, reverse threaded rod 17, the same thing, drive apron 7 and move up, can open jar body 3, then, start step motor 10, drive action wheel 11 rotates, because action wheel 11 is connected with from driving wheel 13 transmission, and then drive bull stick 12 and rotate, realize jar upset of body 3, and then the raw materials of being convenient for to smelt pours along baffle box 20 in sintering jar 4, the work of being convenient for more takes out, and the use of manpower is saved, and machining efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims (8)

1. A sintering device for powder metallurgy based on amorphous nanocrystalline materials comprises a concave frame (1), a case (2) and a tank body (3), and is characterized in that the case (2) is fixedly connected with one side of the concave frame (1), the tank body (3) is arranged in the concave frame (1), a turnover mechanism is arranged in the case (2), one end of the turnover mechanism penetrates through the case (2) and the concave frame (1) and is fixedly connected with one side of the tank body (3), the inner wall of one side, away from the case (2), of the concave frame (1) is rotatably connected with the side wall of the tank body (3) through a first rotating piece, a sintering tank (4) is arranged in the tank body (3), a support ring (5) is fixedly connected between the sintering tank (4) and the tank body (3), a heating pipe (6) is sleeved and fixedly connected with the side wall of the sintering tank (4), a cover plate (7) matched with the opening of the tank body (3) is arranged above the tank body, the improved sintering tank is characterized in that a pressing mechanism is arranged on the tank body (3), one end of the pressing mechanism is rotatably connected with the upper side of the cover plate (7), an air inlet pipe (8) communicated with the sintering tank (4) is arranged on the upper side of the cover plate (7), a pressure pump (9) is fixedly connected to the upper side of the case (2), and the air outlet end of the pressure pump (9) and one end, far away from the cover plate (7), of the air inlet pipe (8) are communicated and arranged through a pipeline.
2. The sintering device for powder metallurgy based on amorphous nanocrystalline materials as claimed in claim 1, wherein the turnover mechanism includes a stepping motor (10) fixed at the bottom inside the case (2), the driving end of the stepping motor (10) is rotatably connected with a driving shaft transversely arranged, and one end of the driving shaft far away from the stepping motor (10) is fixedly connected with a driving wheel (11), the case (2) is inserted into the side wall of the tank body (3) and is rotatably connected with a rotating rod (12) transversely arranged, one end of the rotating rod (12) extends into the case (2) and is fixedly connected with a driven wheel (13), the driving wheel (11) is in transmission connection with the driven wheel (13) through a transmission belt, and one end of the rotating rod (12) far away from the driven wheel (13) is fixedly connected with the tank body (3).
3. The sintering device for powder metallurgy based on amorphous nanocrystalline materials as claimed in claim 2, characterized in that the case (2) is provided with a through hole communicating with the side wall of the tank (3), and the inner wall of the through hole is rotatably connected with the outer side wall of the rotating rod (12) through a bearing.
4. The sintering device for powder metallurgy based on amorphous nanocrystalline material according to claim 1, characterized in that, support tight mechanism and include two fixed blocks (14), two fixed blocks (14) are located the bilateral symmetry setting of jar body (3) respectively, and the equal fixedly connected with montant (15) of two fixed block (14) upside, two fixedly connected with diaphragm (16) between montant (15), the threaded hole is seted up to the lateral wall of diaphragm (16), and threaded connection has threaded rod (17) of vertical setting in the threaded hole, the upside of apron (7) is connected through the lower extreme rotation of second rotation piece and threaded rod (17), and threaded rod (17) keep away from one end fixedly connected with dog (18) of apron (7).
5. The sintering device for powder metallurgy based on amorphous nanocrystalline materials as claimed in claim 4, characterized in that the upper side of the cover plate (7) far away from the threaded rod (17) is fixedly connected with a vertically arranged limiting rod (19), and one end of the limiting rod (19) far away from the cover plate (7) penetrates through the transverse plate (16) and is connected with the inner wall of the through hole in a sliding manner.
6. The sintering device for powder metallurgy based on amorphous nanocrystalline material according to claim 1, characterized in that the open end of the tank (3), the open end of the sintering tank (4) and the upper side of the support ring (5) are all opened with a material guiding groove (20), the side wall of the tank (3) is provided with a cavity, and the cavity is filled with mica heat insulation material.
7. The sintering device for powder metallurgy based on amorphous nanocrystalline material according to claim 1, characterized in that the heating tube (6) is an electric heating tube, and the heating tube (6) is arranged in a spiral coil structure.
8. The sintering device for powder metallurgy based on amorphous nanocrystalline material according to claim 1, characterized in that the lower end side wall of the cover plate (7) is fixedly connected with a protective barrier net (21), and the opening of the air inlet pipe (8) is positioned in the protective barrier net (21).
CN201911286783.3A 2019-12-14 2019-12-14 Sintering device for powder metallurgy based on amorphous nanocrystalline material Withdrawn CN110976854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911286783.3A CN110976854A (en) 2019-12-14 2019-12-14 Sintering device for powder metallurgy based on amorphous nanocrystalline material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911286783.3A CN110976854A (en) 2019-12-14 2019-12-14 Sintering device for powder metallurgy based on amorphous nanocrystalline material

Publications (1)

Publication Number Publication Date
CN110976854A true CN110976854A (en) 2020-04-10

Family

ID=70093558

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911286783.3A Withdrawn CN110976854A (en) 2019-12-14 2019-12-14 Sintering device for powder metallurgy based on amorphous nanocrystalline material

Country Status (1)

Country Link
CN (1) CN110976854A (en)

Similar Documents

Publication Publication Date Title
CN109855427B (en) Vacuum smelting furnace with stirring function
CN104315845A (en) Enclosed self-feeding lead smelting furnace
CN209969540U (en) Pouring device of intermediate frequency furnace
CN110976854A (en) Sintering device for powder metallurgy based on amorphous nanocrystalline material
CN109702178A (en) A kind of modified covering/uncovering device and method for steel ladle full stroke covering
CN213631525U (en) Metallurgical furnace with high heating efficiency
CN215572097U (en) High-efficient melting furnace
CN108031819A (en) A kind of low pressure casting molten bath device
CN205662560U (en) Aluminium melt removes mechanism of qi on line
CN211626080U (en) Iron and steel smelting furnace convenient to add auxiliary material
CN209632089U (en) A kind of centrifugal rotation casting machine of infrared temperature detection
CN212469681U (en) Novel spheroidizing inoculation equipment for casting
CN210963079U (en) High-efficient steaming medicinal herbs pond
CN113575718A (en) Tea rolling device for tea production and processing and use method thereof
CN209773447U (en) Injection mold processing that security is good is with pouring device
CN205825705U (en) A kind of follow-on smelting furnace
CN207130318U (en) Rub grey machine with the hands
CN111664705A (en) Energy-saving efficient smelting furnace
CN210012814U (en) High-efficient preparation biological charcoal device
CN211888977U (en) Casting device is used in ironcasting production convenient to operation
CN217749219U (en) Efficient rotor sand mixer suitable for high-speed sand mixing of foundry
CN214814649U (en) Full-automatic rotating disc type die casting machine
CN212640578U (en) Waste material refining and recycling system
CN205616246U (en) Two dustproof material devices of irritating
CN217715948U (en) Aluminium liquid stove that stews

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
WW01 Invention patent application withdrawn after publication

Application publication date: 20200410

WW01 Invention patent application withdrawn after publication