CN114199017A - Vacuum sintering furnace for manufacturing cutter - Google Patents
Vacuum sintering furnace for manufacturing cutter Download PDFInfo
- Publication number
- CN114199017A CN114199017A CN202111354411.7A CN202111354411A CN114199017A CN 114199017 A CN114199017 A CN 114199017A CN 202111354411 A CN202111354411 A CN 202111354411A CN 114199017 A CN114199017 A CN 114199017A
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- China
- Prior art keywords
- furnace
- vacuum sintering
- door
- sintering furnace
- guide
- 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
- 238000005245 sintering Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000284 extract Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/13—Arrangement of devices for discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D5/0006—Composite supporting structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B2005/062—Cooling elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/066—Vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention relates to the technical field of intelligent processing equipment, in particular to a vacuum sintering furnace for manufacturing a cutter, which comprises a furnace body, a vacuum pump, guide rods and a furnace door, wherein each guide rod comprises a cylinder body, a spring and a connecting ring, the cylinder body is connected with the furnace body in a sliding manner, when the vacuum sintering furnace works, the vacuum pump firstly extracts air in a guide groove, so that the cylinder body drives the furnace door to contract until the furnace door is contacted with the furnace body, a heating cavity is sealed, the heating cavity is communicated with the cylinder body at the moment, the vacuum pump extracts air in the heating cavity to form a vacuum environment, subsequent heating is facilitated, and when the vacuum pump stops working, the furnace door can be opened, so that the reliability of the furnace door is improved.
Description
Technical Field
The invention relates to the technical field of intelligent processing equipment, in particular to a vacuum sintering furnace for manufacturing a cutter.
Background
In the preparation of the cutting tool, a vacuum sintering furnace is often used, and a high vacuum sintering furnace refers to a furnace for performing protective sintering on a heated object in a vacuum environment, and the heating mode is more, such as resistance heating, induction heating, microwave heating and the like.
The furnace door of the existing vacuum sintering furnace has poor fixing effect, and safety accidents are easily caused.
Disclosure of Invention
The invention aims to provide a vacuum sintering furnace for manufacturing a cutter, and aims to solve the technical problems that the furnace door of the vacuum sintering furnace in the prior art is poor in fixing effect and is easy to cause safety accidents.
In order to achieve the above purpose, the present invention provides a cutter manufacturing vacuum sintering furnace, which includes a furnace body, a vacuum pump, two guide rods and a furnace door, wherein a heating cavity and two guide grooves are arranged inside the furnace body, the two guide grooves are respectively arranged on two sides of the heating cavity, a communication hole is arranged on the inner side wall of each guide groove, each communication hole is communicated with the heating cavity, the vacuum pump is arranged on one side of the furnace body and is respectively connected with two guide groove pipelines, the two guide rods are respectively movably connected with the furnace body and are respectively located inside the corresponding guide grooves, and the furnace door is respectively fixedly connected with the two guide rods and is located on one side of the heating cavity;
every the guide bar all includes barrel, spring and go-between, the barrel with furnace body sliding connection, and be located the inside of guide way, the go-between with barrel fixed connection, and be located the inside of barrel, the one end of spring with go-between fixed connection, the other end of spring with furnace body fixed connection, and be located the inside of guide way, the barrel is close to one side in heating chamber is provided with the through-hole.
When the vacuum pump stops working, the furnace door can be opened only when the furnace door is opened, and the reliability of the furnace door is improved.
Wherein, the furnace gate includes the door body, support frame and places the platform, the both ends of the door body respectively with correspond barrel fixed connection, and be located one side of heating chamber, the support frame set up in the door body is close to one side of heating chamber, place the platform with support frame sliding connection, and be located the top of support frame.
Can place the cutter place the top of platform starts behind the vacuum pump, the door body drives place the platform and get into in the heating chamber, accomplish the pay-off for the staff does not need both hands to get into the heating chamber is operated, has improved the security.
The vacuum sintering furnace for manufacturing the cutter further comprises a discharging rod, and the discharging rod is arranged on one side of the furnace door.
After the furnace body is heated, the vacuum pump stops working, the spring recovers deformation and pushes the barrel out, so that the door body is opened, the discharging rod pushes the placing table, the placing table is pushed away from the supporting frame, and a worker can conveniently collect the cutter.
Wherein, the discharge arm includes supporting seat, cylinder, movable block, motor and block, the supporting seat set up in one side of the door body, the cylinder set up in the top of supporting seat, the movable block with the output swing joint of cylinder, and be located the cylinder with place between the platform, the motor set up in the inside of movable block, the block with the output of motor rotates to be connected, and is located the movable block with place between the platform.
The air cylinder pushes the movable block and the clamping block to move until the clamping block enters the placing table, the motor rotates the clamping block, so that the clamping block is clamped with the placing table, and the air cylinder continues to push the placing table to be separated from the supporting frame.
The placing table comprises a frame body and a plate body, the frame body is movably connected with the supporting frame and is located above the supporting frame, the plate body is fixedly connected with the frame body and is located on the frame body, and a clamping hole is formed in one side, close to the clamping block, of the frame body.
The air cylinder pushes the movable block and the clamping block to move until the clamping block enters the placing table, the motor rotates the clamping block, the clamping block is clamped with the frame body, and the air cylinder continues to push the plate body to be separated from the supporting frame.
The vacuum sintering furnace for manufacturing the cutter further comprises a fan, and the fan is arranged on one side, far away from the discharging rod, of the door body.
After the placing table is separated from the supporting frame, the fan is started to cool the cutter above the plate body, so that the cutter is convenient for workers to collect.
According to the vacuum sintering furnace manufactured by the cutter, when the vacuum sintering furnace is operated, the vacuum pump firstly extracts air in the guide groove, so that the furnace door is driven by the cylinder body to contract until the furnace door is contacted with the furnace body, the heating cavity is sealed, the heating cavity is communicated with the cylinder body at the moment, the vacuum pump extracts air in the heating cavity to form a vacuum environment, subsequent heating is facilitated, and when the vacuum pump stops operating, the furnace door can be opened.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view of a tool manufacturing vacuum sintering furnace provided by the present invention.
Fig. 2 is a sectional view of a vacuum sintering furnace for manufacturing a cutting tool according to the present invention.
FIG. 3 is a sectional view showing a closed state of the furnace body according to the present invention.
Figure 4 is a cross-sectional view of the oven door provided by the present invention.
Fig. 5 is a cross-sectional view of a discharge bar provided by the present invention.
1-furnace body, 2-vacuum pump, 3-guide rod, 4-furnace door, 5-heating cavity, 6-guide groove, 7-communicating hole, 8-cylinder, 9-spring, 10-connecting ring, 11-through hole, 12-door body, 13-support frame, 14-placing table, 15-discharging rod, 16-support seat, 17-cylinder, 18-movable block, 19-motor, 20-clamping block, 21-frame body, 22-plate body, 23-clamping hole, 24-fan, 25-first sealing ring, 26-second sealing ring and 27-rectangular hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 5, the present invention provides a cutter manufacturing vacuum sintering furnace, which includes a furnace body 1, a vacuum pump 2, two guide rods 3 and a furnace door 4, wherein a heating cavity 5 and two guide grooves 6 are arranged inside the furnace body 1, the two guide grooves 6 are respectively arranged on two sides of the heating cavity 5, a communication hole 7 is arranged on an inner side wall of each guide groove 6, each communication hole 7 is communicated with the heating cavity 5, the vacuum pump 2 is arranged on one side of the furnace body 1 and is respectively connected with the two guide grooves 6 through a pipeline, the number of the guide rods 3 is two, the two guide rods 3 are respectively movably connected with the furnace body 1 and are respectively located inside the corresponding guide grooves 6, the furnace door 4 is respectively fixedly connected with the two guide rods 3, and is positioned at one side of the heating cavity 5;
every guide bar 3 all includes barrel 8, spring 9 and go-between 10, barrel 8 with 1 sliding connection of furnace body, and be located the inside of guide way 6, go-between 10 with 8 fixed connection of barrel, and be located the inside of barrel 8, spring 9's one end with go-between 10 fixed connection, spring 9's the other end with 1 fixed connection of furnace body, and be located the inside of guide way 6, barrel 8 is close to one side of heating chamber 5 is provided with through-hole 11.
In this embodiment, carry out the during operation, vacuum pump 2 draws earlier the air in the guide way 6 makes barrel 8 drives furnace door 4 shrink, until furnace door 4 with the contact of furnace body 1, will heating chamber 5 seals, this moment heating chamber 5 with barrel 8 intercommunication, vacuum pump 2 extracts air in heating chamber 5 forms vacuum environment, the subsequent heating of being convenient for, works as when vacuum pump 2 stops working, furnace door 4 just can open, through above-mentioned structure, with the closed function of furnace body 1 and vacuum function set in an organic whole, has simplified the operation of equipment, has improved the reliability of furnace door 4 makes furnace body 1 with connect more firmly between the furnace door 4.
Further, the oven door 4 includes a door body 12, a support frame 13 and a placing table 14, two ends of the door body 12 are respectively fixedly connected with the corresponding cylinder 8 and located at one side of the heating chamber 5, the support frame 13 is disposed at one side of the door body 12 close to the heating chamber 5, and the placing table 14 is slidably connected with the support frame 13 and located above the support frame 13; the cutter manufacturing vacuum sintering furnace further comprises a discharging rod 15, and the discharging rod 15 is arranged on one side of the furnace door 4; the discharging rod 15 comprises a supporting seat 16, an air cylinder 17, a movable block 18, a motor 19 and a clamping block 20, the supporting seat 16 is arranged on one side of the door body 12, the air cylinder 17 is arranged above the supporting seat 16, the movable block 18 is movably connected with the output end of the air cylinder 17 and is positioned between the air cylinder 17 and the placing table 14, the motor 19 is arranged inside the movable block 18, and the clamping block 20 is rotatably connected with the output end of the motor 19 and is positioned between the movable block 18 and the placing table 14; the placing table 14 comprises a frame body 21 and a plate body 22, the frame body 21 is movably connected with the support frame 13 and is positioned above the support frame 13, the plate body 22 is fixedly connected with the frame body 21 and is positioned on the frame body 21, and a clamping hole 23 is formed in one side of the frame body 21 close to the clamping block 20; the vacuum sintering furnace for manufacturing the cutter further comprises a fan 24, and the fan 24 is arranged on one side, away from the discharging rod 15, of the door body 12.
In this embodiment, after the furnace body 1 is heated, the vacuum pump 2 stops operating, the spring 9 recovers deformation, the cylinder 8 is ejected out, the door 12 is opened, the cylinder 17 pushes the movable block 18 and the engaging block 20 to move until the engaging block 20 enters the placing table 14, the motor 19 rotates the engaging block 20, the engaging block 20 is engaged with the frame 21, and the cylinder 17 continues to push the plate 22 to separate from the supporting frame 13; after the placing table 14 is separated from the supporting frame 13, the fan 24 is started to cool the cutter above the plate body 22, so that the cutter is convenient for workers to collect.
Further, the vacuum sintering furnace for manufacturing the cutter comprises two first sealing rings 25, and the two first sealing rings 25 are respectively and fixedly connected with the furnace door 4 and are respectively positioned on the outer side wall of the corresponding cylinder 8.
In the present embodiment, after the furnace door 4 is brought into contact with the furnace body 1, the first seal ring 25 is brought into close contact with the opening of the guide groove 6 to close the guide groove 6, thereby improving the airtightness of the guide groove 6.
Further, each guide rod 3 further comprises a second sealing ring 26, and the second sealing ring 26 is slidably connected with the cylinder 8 and is arranged inside the guide groove 6.
In this embodiment, the second seal ring 26 is a high-temperature resistant sliding seal ring, and the airtightness of the guide groove 6 is ensured when the cylindrical body 8 slides along the sliding seal ring.
Further, a plurality of rectangular holes 27 are uniformly arranged at intervals on the top end of the plate body 22.
In this embodiment, when the furnace body 1 is heated, the rectangular holes 27 are provided to reduce the contact surface between the plate body 22 and the tool, thereby ensuring that the tool surface is heated and improving the sintering effect.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A vacuum sintering furnace for manufacturing cutters, which is characterized in that,
the vacuum sintering furnace for manufacturing the cutter comprises a furnace body (1), a vacuum pump (2), guide rods (3) and a furnace door (4), wherein a heating cavity (5) and guide grooves (6) are formed in the furnace body (1), the number of the guide grooves (6) is two, the guide grooves (6) are respectively arranged on two sides of the heating cavity (5), each inner side wall of each guide groove (6) is provided with a communication hole (7), each communication hole (7) is communicated with the heating cavity (5), the vacuum pump (2) is arranged on one side of the furnace body (1) and is respectively connected with two guide grooves (6) through pipelines, the number of the guide rods (3) is two, the guide rods (3) are respectively connected with the furnace body (1) in a movable mode and are respectively located in the corresponding guide grooves (6), the furnace door (4) is fixedly connected with the two guide rods (3) respectively and is positioned at one side of the heating cavity (5);
every guide bar (3) all includes barrel (8), spring (9) and go-between (10), barrel (8) with furnace body (1) sliding connection, and be located the inside of guide way (6), go-between (10) with barrel (8) fixed connection, and be located the inside of barrel (8), the one end of spring (9) with go-between (10) fixed connection, the other end of spring (9) with furnace body (1) fixed connection, and be located the inside of guide way (6), barrel (8) are close to one side of heating chamber (5) is provided with through-hole (11).
2. The tool manufacturing vacuum sintering furnace of claim (1),
furnace gate (4) are including the door body (12), support frame (13) and place platform (14), the both ends of the door body (12) respectively with correspond barrel (8) fixed connection, and be located one side of heating chamber (5), support frame (13) set up in the door body (12) are close to one side of heating chamber (5), place platform (14) with support frame (13) sliding connection, and be located the top of support frame (13).
3. The tool making vacuum sintering furnace of claim 2,
the cutter manufacturing vacuum sintering furnace further comprises a discharging rod (15), and the discharging rod (15) is arranged on one side of the furnace door (4).
4. The tool making vacuum sintering furnace of claim 3,
discharge arm (15) include supporting seat (16), cylinder (17), movable block (18), motor (19) and block piece (20), supporting seat (16) set up in one side of the door body (12), cylinder (17) set up in the top of supporting seat (16), movable block (18) with the output swing joint of cylinder (17), and be located cylinder (17) with place between platform (14), motor (19) set up in the inside of movable block (18), block piece (20) with the output of motor (19) rotates and is connected, and is located movable block (18) with place between platform (14).
5. The tool making vacuum sintering furnace of claim 4,
the placing table (14) comprises a frame body (21) and a plate body (22), the frame body (21) is movably connected with the supporting frame (13) and is located above the supporting frame (13), the plate body (22) is fixedly connected with the frame body (21) and is located on the frame body (21), and a clamping hole (23) is formed in one side, close to the clamping block (20), of the frame body (21).
6. The tool making vacuum sintering furnace of claim 4,
the vacuum sintering furnace for manufacturing the cutter further comprises a fan (24), and the fan (24) is arranged on one side, away from the discharging rod (15), of the door body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111354411.7A CN114199017A (en) | 2021-11-16 | 2021-11-16 | Vacuum sintering furnace for manufacturing cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111354411.7A CN114199017A (en) | 2021-11-16 | 2021-11-16 | Vacuum sintering furnace for manufacturing cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114199017A true CN114199017A (en) | 2022-03-18 |
Family
ID=80647721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111354411.7A Pending CN114199017A (en) | 2021-11-16 | 2021-11-16 | Vacuum sintering furnace for manufacturing cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114199017A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203132325U (en) * | 2013-03-21 | 2013-08-14 | 重庆润泽医药有限公司 | Vacuum sintering furnace with high sealing performance |
| CN203163471U (en) * | 2013-04-02 | 2013-08-28 | 重庆润泽医药有限公司 | Laser vacuum sintering furnace with high tightness |
| CN204594240U (en) * | 2015-04-17 | 2015-08-26 | 宁波恒普真空技术有限公司 | Vacuum drying oven door opening and closing forced locking device |
| CN206872875U (en) * | 2017-07-11 | 2018-01-12 | 象山勇晖机电设备有限公司 | Save quenching heating furnace |
| CN210464023U (en) * | 2019-08-19 | 2020-05-05 | 合肥真萍电子科技有限公司 | Vacuum baking tray furnace |
| CN210689172U (en) * | 2019-11-08 | 2020-06-05 | 南京市溧水同发机械刀模具制造有限公司 | High vacuum sintering furnace for cutter preparation |
| CN214148844U (en) * | 2021-01-18 | 2021-09-07 | 潍坊中加碳化硅科技有限公司 | High-temperature vacuum silicon carbide sintering furnace |
-
2021
- 2021-11-16 CN CN202111354411.7A patent/CN114199017A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203132325U (en) * | 2013-03-21 | 2013-08-14 | 重庆润泽医药有限公司 | Vacuum sintering furnace with high sealing performance |
| CN203163471U (en) * | 2013-04-02 | 2013-08-28 | 重庆润泽医药有限公司 | Laser vacuum sintering furnace with high tightness |
| CN204594240U (en) * | 2015-04-17 | 2015-08-26 | 宁波恒普真空技术有限公司 | Vacuum drying oven door opening and closing forced locking device |
| CN206872875U (en) * | 2017-07-11 | 2018-01-12 | 象山勇晖机电设备有限公司 | Save quenching heating furnace |
| CN210464023U (en) * | 2019-08-19 | 2020-05-05 | 合肥真萍电子科技有限公司 | Vacuum baking tray furnace |
| CN210689172U (en) * | 2019-11-08 | 2020-06-05 | 南京市溧水同发机械刀模具制造有限公司 | High vacuum sintering furnace for cutter preparation |
| CN214148844U (en) * | 2021-01-18 | 2021-09-07 | 潍坊中加碳化硅科技有限公司 | High-temperature vacuum silicon carbide sintering furnace |
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