CN215295793U - Ceramic metallization firing device for vacuum relay - Google Patents
Ceramic metallization firing device for vacuum relay Download PDFInfo
- Publication number
- CN215295793U CN215295793U CN202120547859.XU CN202120547859U CN215295793U CN 215295793 U CN215295793 U CN 215295793U CN 202120547859 U CN202120547859 U CN 202120547859U CN 215295793 U CN215295793 U CN 215295793U
- Authority
- CN
- China
- Prior art keywords
- horizontal box
- box body
- area
- zone
- loading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 21
- 238000010304 firing Methods 0.000 title claims abstract description 12
- 238000001465 metallisation Methods 0.000 title claims abstract description 10
- 239000001257 hydrogen Substances 0.000 claims abstract description 46
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005245 sintering Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000005485 electric heating Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Landscapes
- Furnace Details (AREA)
Abstract
The utility model discloses a ceramic metallization firing device for a vacuum relay, a loading area, a preheating area, a sintering area, a cooling area and an unloading area are sequentially arranged in a horizontal box body, a loading plate is arranged in the horizontal box body, a driving lead screw and a sliding rod for driving the loading plate to move are arranged in the horizontal box body, one end of the driving lead screw penetrates out of the horizontal box body to be connected with a driving motor, a loading frame is arranged on the loading plate, a plurality of electric heating tubes are arranged on the side wall of the preheating area, a plurality of first dry hydrogen inlet pipes are arranged at the top of the preheating area, an electric heating coil is arranged on the side wall of the sintering area, a plurality of first hydrogen inlet pipes are arranged at the top of the sintering area, a plurality of second dry hydrogen inlet pipes and a plurality of first wet hydrogen inlet pipes are arranged at the top of the cooling area, an air outlet is arranged on the horizontal box body, an electromagnetic valve is arranged at the air outlet, a thermal insulation layer is coated on the outer wall of the horizontal box body, the problems of uneven atmosphere distribution, poor product quality, glaze oxidation and the like can be solved, and the qualification rate of products is improved.
Description
Technical Field
The utility model relates to a ceramic metallizing device technical field, concretely relates to device is fired in vacuum relay ceramic metallizing.
Background
The high-temperature hydrogen sintering furnace is mainly used for sintering materials, is widely applied to the fields of new energy development, heat treatment, powder metallurgy and ceramic metallization, and has the defects of nonuniform distribution of atmosphere in the furnace, nonuniform bonding force of a ceramic metallization layer, more oxidized products after the products are discharged and low product percent of pass in the high-temperature hydrogen sintering furnace for ceramic metallization sintering of the vacuum relay in the current market.
Disclosure of Invention
In order to solve the shortcomings in the prior art, the utility model provides a device is fired to vacuum relay ceramic metallization.
In order to realize the technical effect, the utility model discloses a following scheme:
a ceramic metallization firing device for a vacuum relay comprises a horizontal box body, wherein a feed inlet and a discharge outlet are respectively arranged at two ends of the horizontal box body, a first box door and a second box door are respectively arranged at the feed inlet and the discharge outlet in a matching manner, a loading area, a preheating area, a sintering area, a cooling area and an unloading area are sequentially arranged in the horizontal box body from the feed inlet to the discharge outlet, a driving screw rod is arranged in the horizontal box body, two ends of the driving screw rod are respectively rotatably arranged at the feed inlet and the discharge outlet through first bearings, one end of the driving screw rod penetrates out of the horizontal box body to be connected with a driving motor, a sliding rod horizontally parallel to the driving screw rod is arranged at one side of the driving screw rod, two ends of the sliding rod are respectively arranged at the feed inlet and the discharge outlet, a loading plate is arranged in the horizontal box body, a threaded hole matched with the driving screw rod and a sliding hole matched with the sliding rod are arranged on the loading plate, the utility model discloses a sintering zone, including loading plate, drive lead screw, slide bar, loading frame, preheating zone, a plurality of dry hydrogen inlet pipes, electric heating coil, sintering zone, cooling zone, solenoid valve, the drive lead screw passes the screw hole setting, the slide bar passes the slide opening setting, place the loading frame on the loading plate, install a plurality of electrothermal tubes on the lateral wall of preheating zone, the top of preheating zone is equipped with a plurality of first dry hydrogen inlet pipes, install electric heating coil on the lateral wall of sintering zone, the top of sintering zone is equipped with a plurality of first hydrogen inlet pipes, the top of cooling zone is equipped with a plurality of second dry hydrogen inlet pipes and a plurality of first wet hydrogen inlet pipes, be equipped with the gas vent on the horizontal box, the solenoid valve is installed to the gas vent, the cladding is equipped with the insulating layer on the outer wall of horizontal box.
According to the preferable technical scheme, an air layer is arranged between the heat insulation layer and the outer wall of the horizontal box body.
The air bed includes the shell that sets up around horizontal box outer wall, the both ends of shell are respectively through the both ends sealing connection of shrouding with horizontal box, do not throw out between the outer wall of shell and horizontal box and form the air chamber, the insulating layer cladding is located on the shell, the one end of shell has a plurality of air inlets that set up around the shell, the air inlet runs through the insulating layer, the other end of shell has a plurality of gas outlets that set up around the shell, the gas outlet runs through the insulating layer.
According to the preferable technical scheme, a plurality of supporting plates are arranged between the shell and the side wall of the horizontal box body, the length of each supporting plate is arranged along the length of the shell, one side of each supporting plate is fixedly connected with the shell, the other side of each supporting plate is fixedly connected with the horizontal box body, the supporting plates are uniformly distributed around the horizontal box body, and a plurality of communicating holes are formed in the supporting plates along the length of the supporting plates.
According to the preferred technical scheme, an air outlet pipe arranged around the horizontal box body is arranged outside the heat insulation layer, the air outlet is connected with the air outlet pipe through a communicating pipe, and an exhaust pipe is arranged on the air outlet pipe.
According to the preferable technical scheme, the loading area, the preheating area, the sintering area, the cooling area and the unloading area are respectively divided by partition plates, and the lower ends of the partition plates are not connected with the bottom of the horizontal box body and are provided with channels for the loading plate and the loading frame to pass through.
Compared with the prior art, beneficial effect does:
the utility model discloses simple structure, convenient to use adopts zone control, first dry hydrogen inlet pipe, first hydrogen inlet pipe, the dry hydrogen inlet pipe of second and first wet hydrogen inlet pipe, all load the frame exhaust from the top orientation, make the atmosphere that loads in the frame distribute evenly to the feed inlet all is equipped with a plurality ofly, can solve the bad problem of product quality that the ceramic quantity too much arouses in the loading frame, and prevented the glaze oxidation through the combination of dry hydrogen with wet hydrogen, promoted the qualification rate of product.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention.
Reference numerals: 1. a horizontal box body; 101. a feed inlet; 102. a discharge port; 2. a first door; 3. a second door; 4. a loading zone; 5. a preheating zone; 6. a sintering zone; 7. a cooling zone; 8. an unloading area; 9. driving the screw rod; 10. a drive motor; 11. a loading plate; 12. a loading frame; 13. a first dry hydrogen feed conduit; 14. an electric heating tube; 15. a first hydrogen feed pipe; 16. an electric heating coil; 17. a second dry hydrogen feed pipe; 18. a first wet hydrogen feed conduit; 19. an exhaust port; 20. an electromagnetic valve; 21. a thermal insulation layer; 22. a housing; 23. an air chamber; 24. closing the plate; 25. an air inlet; 26. an air outlet; 27. an air outlet pipe; 28. an exhaust pipe; 29. an air pump; 30. a separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The utility model provides a vacuum relay ceramic metallization firing device, includes horizontal box 1, the length of horizontal box 1 sets up in the horizontal direction, the both ends of horizontal box 1 are equipped with feed inlet 101 and discharge gate 101 respectively, feed inlet 101 matches and is equipped with first chamber door 2, first chamber door 2 is closed and is connected with feed inlet 101 sealing, discharge gate 101 matches and is equipped with second chamber door 3, second chamber door 3 is closed and is connected with discharge gate 101 sealing, be equipped with loading region 4, preheating region 5, sintering region 6, cooling region 7 and uninstallation district 8 in the horizontal box 1, loading region 4, preheating region 5, sintering region 6, cooling region 7 and uninstallation district 8 set gradually along the direction of feed inlet 101 to discharge gate 101, loading region 4 is connected with feed inlet 101, uninstallation district 8 is connected with discharge gate 101.
The horizontal type box body 1 is internally provided with a driving screw rod 9, the driving screw rod 9 is arranged close to the bottom of the horizontal type box body 1, two ends of the driving screw rod 9 are respectively rotatably installed at a feed inlet 101 and a discharge outlet 101 through first bearings, one end of the driving screw rod 9 penetrates out of the horizontal type box body 1 to be connected with a driving motor 10, the driving motor 10 drives the driving screw rod 9 to rotate, one side of the driving screw rod 9 is provided with a sliding rod, the sliding rod is arranged on a horizontal plane in parallel with the driving screw rod 9 at intervals, two ends of the sliding rod are respectively installed at the feed inlet 101 and the discharge outlet 101, the horizontal type box body 1 is internally provided with a loading plate 11, the loading plate 11 is respectively and horizontally penetrated with a threaded hole and a sliding hole, the threaded hole is matched with the driving screw rod 9, the driving screw rod 9 penetrates through the threaded hole, and the sliding hole is matched with the sliding rod, the slide rod penetrates through the slide hole, the loading plate 11 is driven to move in the horizontal box body 1 along the direction from the feeding port 101 to the discharging port 101 through the rotation of the driving screw rod 9, the loading frame 12 is placed on the loading plate 11, and ceramics needing to be metallized are placed in the loading frame 12.
The side wall of the preheating zone 5 is provided with an electric heating tube 14, the preheating zone is heated by the electric heating tube 14, the top of the preheating zone 5 is provided with a plurality of first dry hydrogen feeding tubes 13, the first dry hydrogen feeding tubes 13 are introduced with dry hydrogen to provide atmosphere for the preheating zone 5, the first dry hydrogen feeding tubes 13 are connected with first feeding tubes for providing dry hydrogen, the first feeding tubes are provided with first gas flow controllers, the side wall of the sintering zone 6 is provided with an electric heating coil 16, the heating is carried out by the electric heating coil 16, the top of the sintering zone 6 is provided with a plurality of first hydrogen feeding tubes 15 for providing sintering hydrogen atmosphere for the sintering zone 6, the first hydrogen feeding tubes 15 are connected with second feeding tubes for providing hydrogen, the second feeding tubes are provided with second gas flow controllers, the top of the cooling zone 7 is provided with a plurality of second dry hydrogen feeding tubes 17 and a plurality of first wet hydrogen feeding tubes 18, the second dry hydrogen feeding pipe 17 is connected with a third feeding pipe for providing dry hydrogen, a third gas flow controller is arranged on the third feeding pipe, the first wet hydrogen feeding pipe 18 is connected with a fourth feeding pipe for providing wet hydrogen, a fourth gas flow controller is arranged on the fourth feeding pipe, wet hydrogen can react with organic adhesives, and the ceramic is prevented from being oxidized and blackened during cooling.
Before firing, the loading plate 11 is driven to stop at the loading area 4, the first box door 2 is opened to place a loading frame 12 filled with ceramics on the loading plate 11, the first box door 2 is closed, the loading plate 11 is driven to move to the preheating area 5, the electric heating tube 14 heats and feeds dry hydrogen for preheating, the loading plate 11 is driven to move to the sintering area 6 after completion, the electric heating coil 16 heats and feeds hydrogen for sintering, the loading plate 11 is driven to move to the cooling area 7 after completion, the dry hydrogen and the wet hydrogen are fed for cooling, the loading plate 11 is driven to move to the unloading area 8 after completion, and the second box door 3 is opened to take out the loading frame 12.
The horizontal type box body 1 is provided with an exhaust port 19, the exhaust port 19 is provided with an electromagnetic valve 20 for timely discharging waste gas, and the outer wall of the horizontal type box body 1 is coated with a heat insulation layer 21 to prevent high temperature scald caused by overhigh temperature of the outer wall of the horizontal type box body 1.
The utility model has the advantages of preferred technical scheme be equipped with the air bed between the outer wall of insulating layer 21 and horizontal box 1, the air bed sets up around horizontal box 1, insulates against heat through the air bed, can reduce the practicality of insulating material in insulating layer 21, reduce cost.
Preferably, the air layer includes a housing 22, the housing 22 is arranged around the outer wall of the horizontal box 1, two ends of the housing 22 are respectively connected with two ends of the horizontal box 1 in a sealing manner through closing plates 24, an air cavity 23 is not connected between the housing 22 and the outer wall of the horizontal box 1, the heat-insulating layer 21 is coated on the outer wall of the housing 22, one end of the housing 22 is provided with a plurality of air inlets 25 arranged around the housing 22, the air inlets 25 penetrate through the heat-insulating layer 21, the other end of the housing 22 is provided with a plurality of air outlets 26 arranged around the housing 22, the air outlets 26 penetrate through the heat-insulating layer 21, air enters the air cavity 23 from the air inlets 25, and the air cavity 23 is discharged from the air outlets 26.
According to the preferable technical scheme, a plurality of supporting plates are arranged between the outer shell 22 and the outer wall of the horizontal box body 1, the connecting between the outer shell 22 and the horizontal box body 1 is strengthened, the length of each supporting plate is arranged along the length of the outer shell 22, one side of each supporting plate is fixedly connected with the outer shell 22, the other side of each supporting plate is fixedly connected with the horizontal box body 1, the supporting plates are uniformly distributed around the horizontal box body 1, and a plurality of communicating holes are formed in the supporting plates along the length of the supporting plates.
According to the preferable technical scheme, an air outlet pipe 27 arranged around the horizontal box body 1 is arranged outside the heat insulation layer 21, the air outlet 26 is connected with the air outlet pipe 27 through a communicating pipe, an exhaust pipe 28 is arranged on the air outlet pipe 27, an air pump 29 is installed on the exhaust pipe 28, hot air exhausted from the air cavity 23 can be exhausted to other places through the exhaust pipe 28, and the indoor temperature of a production workshop is prevented from being directly diffused in the air.
In a preferred technical scheme, the loading zone 4, the preheating zone 5, the sintering zone 6, the cooling zone 7 and the unloading zone 8 are respectively divided by a partition plate 30, and the lower end of the partition plate 30 is not connected with the bottom of the horizontal box body 1 and is provided with a channel for the loading plate 11 and the loading frame 12 to pass through, so that the atmosphere is formed.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, or the orientation or position relationship that one skilled in the art conventionally understands, and are only for convenience of describing the present invention and simplifying the description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Claims (6)
1. A ceramic metallization firing device for a vacuum relay is characterized by comprising a horizontal box body, wherein a feeding port and a discharging port are respectively arranged at two ends of the horizontal box body, a first box door and a second box door are respectively arranged at the feeding port and the discharging port in a matched manner, a loading area, a preheating area, a sintering area, a cooling area and an unloading area are sequentially arranged in the horizontal box body from the feeding port to the discharging port, a driving lead screw is arranged in the horizontal box body, two ends of the driving lead screw are respectively rotatably arranged at the feeding port and the discharging port through first bearings, one end of the driving lead screw penetrates out of the horizontal box body and is connected with a driving motor, a sliding rod horizontally parallel to the driving lead screw is arranged at one side of the driving lead screw, two ends of the sliding rod are respectively arranged at the feeding port and the discharging port, a loading plate is arranged in the horizontal box body, a threaded hole matched with the driving lead screw and a sliding hole matched with the sliding rod are arranged on the loading plate, the utility model discloses a sintering zone, including loading plate, drive lead screw, slide bar, loading frame, preheating zone, a plurality of dry hydrogen inlet pipes, electric heating coil, sintering zone, cooling zone, solenoid valve, the drive lead screw passes the screw hole setting, the slide bar passes the slide opening setting, place the loading frame on the loading plate, install a plurality of electrothermal tubes on the lateral wall of preheating zone, the top of preheating zone is equipped with a plurality of first dry hydrogen inlet pipes, install electric heating coil on the lateral wall of sintering zone, the top of sintering zone is equipped with a plurality of first hydrogen inlet pipes, the top of cooling zone is equipped with a plurality of second dry hydrogen inlet pipes and a plurality of first wet hydrogen inlet pipes, be equipped with the gas vent on the horizontal box, the solenoid valve is installed to the gas vent, the cladding is equipped with the insulating layer on the outer wall of horizontal box.
2. The ceramic metallizing firing apparatus for vacuum relays according to claim 1, wherein an air layer is provided between the heat insulating layer and the outer wall of the horizontal type case.
3. The ceramic metalized firing device for the vacuum relay according to claim 2, wherein the air layer comprises a shell arranged around the outer wall of the horizontal box body, two ends of the shell are respectively connected with two ends of the horizontal box body in a sealing manner through sealing plates, the shell is not connected with the outer wall of the horizontal box body to form an air cavity, the heat-insulating layer is coated on the shell, one end of the shell is provided with a plurality of air inlets arranged around the shell, the air inlets penetrate through the heat-insulating layer, the other end of the shell is provided with a plurality of air outlets arranged around the shell, and the air outlets penetrate through the heat-insulating layer.
4. The ceramic metallizing firing apparatus for vacuum relays according to claim 3, wherein a plurality of supporting plates are provided between the housing and the side wall of the horizontal box, the supporting plates are arranged along the length of the housing, one side of the supporting plates is fixedly connected to the housing, the other side of the supporting plates is fixedly connected to the horizontal box, the plurality of supporting plates are uniformly distributed around the horizontal box, and a plurality of communication holes are provided on the supporting plates along the length of the supporting plates.
5. The vacuum relay ceramic metallizing firing apparatus according to claim 3, wherein an air outlet pipe is provided outside the heat insulating layer and around the horizontal box body, the air outlet pipe being connected to the air outlet pipe through a communicating pipe, the air outlet pipe being provided with an exhaust pipe.
6. The vacuum relay ceramic metallizing firing apparatus according to claim 1, wherein said loading zone, preheating zone, sintering zone, cooling zone and unloading zone are respectively distinguished by partitions, the lower ends of which are not connected to the bottom of the horizontal type case and have passages through which the loading plate and the loading frame pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120547859.XU CN215295793U (en) | 2021-03-16 | 2021-03-16 | Ceramic metallization firing device for vacuum relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120547859.XU CN215295793U (en) | 2021-03-16 | 2021-03-16 | Ceramic metallization firing device for vacuum relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215295793U true CN215295793U (en) | 2021-12-24 |
Family
ID=79533870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120547859.XU Expired - Fee Related CN215295793U (en) | 2021-03-16 | 2021-03-16 | Ceramic metallization firing device for vacuum relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215295793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440642A (en) * | 2022-01-25 | 2022-05-06 | 深圳东忠窑炉有限公司 | High-temperature fast-burning shuttle kiln |
-
2021
- 2021-03-16 CN CN202120547859.XU patent/CN215295793U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440642A (en) * | 2022-01-25 | 2022-05-06 | 深圳东忠窑炉有限公司 | High-temperature fast-burning shuttle kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215295793U (en) | Ceramic metallization firing device for vacuum relay | |
| CN208223179U (en) | A kind of spare sintering furnace of ceramic system | |
| CN109850901B (en) | Full-automatic push boat type carbonization furnace for producing superfine tungsten carbide powder | |
| CN204760405U (en) | Annealing oxidation equipment | |
| CN213494735U (en) | High-efficiency energy-saving trolley type flame low-temperature furnace | |
| CN209960963U (en) | Heat treatment kiln | |
| CN213687893U (en) | Vacuum heating furnace | |
| CN201463511U (en) | Sintering furnace | |
| CN114608309B (en) | Energy-saving sectional roasting furnace for aluminum hydroxide balls and roasting process thereof | |
| CN214276520U (en) | Rotary bell jar furnace | |
| CN205884285U (en) | Novel milk processing is with preheating device | |
| CN205222703U (en) | Continuous type lithium iron phosphate high temperature burning atmosphere protection production line | |
| CN205110054U (en) | Steel band oven and steel band rubber coating system for heat preservation of preheating | |
| CN201583125U (en) | High-temperature pressure nitriding furnace | |
| CN212778630U (en) | Self-heating gangue shale sintered brick roasting kiln | |
| CN207362080U (en) | A kind of convection type multilayer preheating furnace | |
| CN107462019B (en) | One-room double-temperature vacuum drying oven and drying method | |
| CN208805046U (en) | Nitrogen combustion controls furnace | |
| CN102853666A (en) | Box-type microwave high-temperature sintering furnace | |
| CN218566129U (en) | Oxygen-enriched sintering roller kiln | |
| CN213379116U (en) | Preheating bag of regenerative precoated sand roasting furnace | |
| CN213103043U (en) | Automatic temperature transmission equipment | |
| CN221781246U (en) | Getter continuous vacuum sintering device | |
| CN205133659U (en) | Ageing furnace of rotatory guiding device in area | |
| CN219674826U (en) | Special fritting furnace of boron nitride material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211224 |