CN110207492A - Convenient type vacuum melting furnace - Google Patents
Convenient type vacuum melting furnace Download PDFInfo
- Publication number
- CN110207492A CN110207492A CN201910603656.5A CN201910603656A CN110207492A CN 110207492 A CN110207492 A CN 110207492A CN 201910603656 A CN201910603656 A CN 201910603656A CN 110207492 A CN110207492 A CN 110207492A
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- Prior art keywords
- furnace body
- furnace
- upper cover
- vacuum
- tight
- 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.)
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Classifications
-
- 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
- F27B14/00—Crucible or pot furnaces
- F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
-
- 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
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
-
- 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
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
-
- 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
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
-
- 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
- F27B14/00—Crucible or pot furnaces
- F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
- F27B2014/045—Vacuum
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention belongs to metal melting equipment technical fields, are related to a kind of convenient type vacuum melting furnace, comprising: support frame；Furnace body is connected by rotating device with support frame, and for furnace interior by bracket system support crucible, crucible outer surface sets gradually packing layer, induction coil and magnetic yoke；The sidewall of the furnace body is provided with for carrying out cooling lower part water cooling plant to induction coil；The furnace body upper end is fastenedly connected upper cover, upper cover and upper of furnace body and is tightly connected by the first sealing ring, and upper of furnace body is provided with for carrying out cooling top water cooling plant to the first sealing ring and upper cover plate；The fixed-type fire door retaining ring of upper cover inner ring, molding fire door retaining ring upper end setting molding converter nose.Product of the present invention is reasonable in design, ingenious, when in use, has the advantages that convenient and reliable operation, and have preferable energy-saving effect, and lower production costs.
Description
Technical field
The invention belongs to metal melting equipment technical fields, are related to a kind of convenient type vacuum melting furnace.
Background technique
Vacuum melting furnace is one kind under high vacuum state, the equipment for carrying out melting to metal in crucible by induction coil.
Existing vacuum drying oven is that the intermediate frequency furnace of melting is placed in vacuum chamber, carries out melting casting.Vacuum chamber volume is huge, cost
Height, it is complicated for operation and be difficult to operate, low efficiency, high production cost when work, when consumption energy consumption.
Summary of the invention
For the present invention in view of the above-mentioned problems, providing a kind of convenient type vacuum melting furnace, the smelting furnace manufacturing cost is low, when work
It is convenient to operate, and controllable high-efficient, production cost is low, and energy-saving effect is good.
A kind of technical solution according to the invention: convenient type vacuum melting furnace characterized by comprising support frame；
Furnace body is connected by rotating device with support frame, furnace interior by bracket system support crucible, crucible outer surface according to
Secondary setting packing layer, induction coil and magnetic yoke；
The sidewall of the furnace body is provided with for carrying out cooling lower part water cooling plant to induction coil；
The furnace body upper end is fastenedly connected upper cover, upper cover and upper of furnace body and is tightly connected by the first sealing ring, and upper of furnace body is set
It is equipped with for carrying out cooling top water cooling plant to the first sealing ring and upper cover；
The fixed-type fire door retaining ring of upper cover inner ring, molding fire door retaining ring upper end setting molding converter nose；
Cylinder is installed, the piston rod of cylinder is connected with the pressure foot at the top of vacuum (-tight) housing, vacuum (-tight) housing lower end at the top of support frame as described above
Second sealing ring is set in the flange groove in face, to realize that vacuum (-tight) housing sealing is pressed in upper lid surface；
The air flue radially extended is provided on the upper lid, air flue inner end extends to crucible interior upper end through molding fire door retaining ring
Place.
As a further improvement of the present invention, the upper end of the furnace body is provided with top connecting flange, the setting of upper cover bottom surface
The sleeve for having integrally connected and extending straight down, the first sealing ring are set at the faying face of top connecting flange and sleeve；
The top water cooling plant includes the water cooled pipeline for being set to top connecting flange inner wall, and water cooled pipeline is connected with water inlet pipe and goes out
Water pipe, the water inlet pipe, outlet pipe outer end all extend on the outside of furnace body.
As a further improvement of the present invention, the lower part water cooling plant includes molding sleeve, and molding sleeve is fixed on furnace body side
On wall, epoxy fixed plate is respectively set close to induction coil one end and outer end in molding sleeve, and two cooling waters are arranged in the molding sleeve
The inner end of energization copper pipe, cooling water energization copper pipe is connected through interior pendant epoxies fixed plate and with the connecting copper pipe of induction coil, cold
Outer pendant epoxies fixed plate is run through in the outer end of cooling water energization bobbin, and is connected with external water power cable, and molding sleeve is cast from by pouring
The epoxy resin of epoxy fixed plate inner cavity realizes that insulated enclosure is fixed.
As a further improvement of the present invention, the rotating device is individually fixed in furnace body outer surface radial two including two
The support tube axis of side, the support tube axis and support frame are rotatablely connected, and the axial outer end of one of support tube axis is fixedly connected
First sprocket wheel is further fixed on sprocket shaft on support frame, the second sprocket wheel of rotation setting, first sprocket wheel and the second chain on sprocket shaft
It is connected between wheel by chain tension, another support tube axis is set in the support sleeve of support frame.
As a further improvement of the present invention, the bracket system includes forming furnace bottom, and forming furnace bottom bottom surface is set gradually
Limit sleeve, support base, the support base are supported on drop-bottom, and drop-bottom is fixed on furnace body lower end, are corresponded on the drop-bottom
Through-hole is set in the region that support base is crowded around, through hole is tightly connected furnace bottom sealing plate.
As a further improvement of the present invention, the vacuum (-tight) housing is also equipped with lifting and guiding device, lifting guiding dress
It sets the guide rail including being fixed on support frame and is set to the idler wheel on vacuum (-tight) housing surface, the idler wheel is matched with guide rail.
As a further improvement of the present invention, it is additionally provided with vacuum tube on the vacuum (-tight) housing, with to taking out in vacuum (-tight) housing
Vacuum operation；Pressure foot is set at the top of vacuum (-tight) housing, and the tailpiece of the piston rod of cylinder is connected with pressure foot.
The technical effects of the invention are that: product of the present invention is reasonable in design, ingenious, when in use, has operation side
It can lean on, controllable high-efficient, production cost is low, energy-saving effect is good.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
In Fig. 1, including furnace body 1, top connecting flange 1-1, upper cover 2, sleeve 2-1, crucible 3, packing layer 4, induction coil 5,
Magnetic yoke 6, top water cooling plant 7, the first sealing ring 8, support tube axis 9, molding sleeve 10, epoxy fixed plate 11, the first fastening bolt
12, forming furnace bottom 13, limit sleeve 14, support base 15, drop-bottom 16, furnace bottom sealing plate 17, the second fastening bolt 18, third sealing ring
19, the first sprocket wheel 20, support frame 21, third fastening bolt 22, the second sealing ring 23, molding fire door retaining ring 24, molding converter nose 25,
Second sprocket wheel 26, chain 27, bearing block 28, bearing 29, rotary disk basement 30, vacuum tube 31, manual turntable 32, vacuum (-tight) housing 33, pressurization
Seat 34, nitrogen inlet 35, cylinder 36 etc..
As shown in Figure 1, the present invention is a kind of convenient type vacuum melting furnace, comprising: support frame 21；
Furnace body 1 is connected by rotating device with support frame 21, passes through bracket system support crucible 3 inside furnace body 1, outside crucible 3
Surface sets gradually packing layer 4, induction coil 5 and magnetic yoke 6；
1 side wall of furnace body is provided with for carrying out cooling lower part water cooling plant to induction coil 5；
1 upper end of furnace body is fastenedly connected upper cover 2, upper cover 2 and 1 top of furnace body and is tightly connected by the first sealing ring 8, furnace body 1
Top is provided with for carrying out cooling top water cooling plant 7 to the first sealing ring 8 and upper cover 2；It is understood that for reality
Existing upper cover 2 is fastenedly connected with 1 upper surface of furnace body, is fastenedly connected upper cover 2 and 1 upper end of furnace body using third fastening bolt 22；
The fixed-type fire door retaining ring 24 of 2 inner ring of upper cover, molding 24 upper end of fire door retaining ring setting molding converter nose 25；
Cylinder 36 is installed at the top of support frame as described above 21, the piston rod of cylinder 36 is connected with the pressure foot 34 at 33 top of vacuum (-tight) housing,
Second sealing ring 23 is set in the flange groove of 33 lower end surface of vacuum (-tight) housing, to realize that the sealing of vacuum (-tight) housing 33 is pressed in 2 surface of upper cover；
The air flue radially extended is provided in the upper cover 2, air flue inner end extends to 3 inner cavity of crucible through molding fire door retaining ring 24
At upper end.
The upper end of furnace body 1 is provided with top connecting flange 1-1, and 2 bottom surface of upper cover is provided with integrally connected and prolongs straight down
The sleeve 2-1 stretched, the first sealing ring 8 are set at the faying face of top connecting flange 1-1 and sleeve 2-1；The top water cooling
Device 7 includes the water cooled pipeline for being set to top connecting flange 1-1 inner wall, and water cooled pipeline is connected with water inlet pipe and outlet pipe, institute
State water inlet pipe, the outer end of outlet pipe all extends to 1 outside of furnace body.
Lower part water cooling plant includes molding sleeve 10, and molding sleeve 10 is fixed on 1 side wall of furnace body, and molding sleeve 10 is close to induction coil
Epoxy fixed plate 11 is respectively set in 5 one end and outer end, and two cooling water energization copper pipes are arranged in the molding sleeve 10, and cooling water is logical
The inner end of electrolytic copper pipe is connected through interior pendant epoxies fixed plate and with the connecting copper pipe of induction coil 5, cold cooling water energization bobbin
Outer pendant epoxies fixed plate is run through in outer end, and is connected with external water power cable, and molding sleeve 10 casts from epoxy fixed plate inner cavity by pouring
Epoxy resin realize insulated enclosure fix.
Rotating device includes two support tube axis 9 for being individually fixed in 1 outer surface radially opposite sides of furnace body, the support tube axis
9 are rotatablely connected with support frame 21, and the axial outer end of one of support tube axis is fixedly connected with the first sprocket wheel 20, go back on support frame 21
It is fixed with sprocket shaft, the second sprocket wheel 26 of rotation setting, passes through chain between first sprocket wheel 20 and the second sprocket wheel 26 on sprocket shaft
The tensioning connection of item 27.In practical applications, support tube axis 9 can be fastenedly connected by the first fastening bolt 12 with furnace body 1, can also
It is welded to connect with passing through.
Bracket system includes forming furnace bottom 13, and 13 bottom surface of forming furnace bottom sets gradually limit sleeve 14, support base 15, the branch
Support seat 15 is supported on drop-bottom 16, and drop-bottom 16 is fixed on 1 lower end of furnace body, is corresponded to support base 15 on the drop-bottom 16 and is enclosed
The region setting through-hole held together, through hole is tightly connected furnace bottom sealing plate 17.In practical applications, through hole is corresponded on drop-bottom 16
Bottom surface stepped counterbore is set, third sealing ring 19 is pressed in stepped counterbore by furnace bottom sealing plate 17, and passes through the second fastening
Bolt 18 is fastenedly connected with drop-bottom 16.
Vacuum (-tight) housing 33 is also equipped with lifting and guiding device, and lifting and guiding device includes being fixed on leading on support frame 21
Rail and the idler wheel for being set to 33 surface of vacuum (-tight) housing, the idler wheel are matched with guide rail.
Vacuum tube 31 is additionally provided on vacuum (-tight) housing 33, with to carrying out vacuumizing operation in vacuum (-tight) housing 33；33 top of vacuum (-tight) housing
Pressure foot 34 is set, and the tailpiece of the piston rod of cylinder 36 is connected with pressure foot 34.In specifically used, pressure foot 34 generallys use ball
Headstock is adjusted, it is ensured that vacuum (-tight) housing 33 exists with realizing that vacuum (-tight) housing can carry out a degree of rotation relative to cylinder piston rod end
Cylinder 36 can be pressed in 2 surface of upper cover under acting on always.
As shown in Figure 1, the course of work of product of the present invention is as follows: rotation manual turntable 32 drives the by manual turntable 32
Two sprocket wheels 26 rotate synchronously, and the second sprocket wheel 26 drives the first sprocket wheel 20 to be rotated in rotation via chain 27, due to first
Sprocket wheel 20 is welded on corresponding support tube axis 9, and support tube axis 9 drives furnace body 1 to rotate in rotation, until furnace body 1 is in vertical
Raw material to be smelted is added into crucible 3 by forming converter nose 25 for state, and after adding well, cylinder 36 starts, and vacuum (-tight) housing 33 is in gas
Under the drive of cylinder 36, it is pressed in 2 surface of upper cover downwards, is compressed between 1 surface of 33 lower end of vacuum (-tight) housing and upper cover by sealing ring close
Envelope, after the compression of vacuum (-tight) housing 33, by vacuum tube 31 to carrying out vacuumizing operation in vacuum (-tight) housing 33, then induction coil 5, which is powered, is produced
Heat can heat crucible 3, carry out Metal Melting operation；In fusion process, in order to avoid the first sealing ring 8 is become by heat
Shape, setting top water cooling plant 7 carry out cooling operations to the first sealing ring 8, it is ensured that the first sealing ring 8 continues reliably to be sealed
Operation；Meanwhile lower part water cooling plant carries out water cooling operation to induction coil 5.
After the Metal Melting in crucible 3, the valve on vacuum tube 31 is closed, while passing through the nitrogen of air flue end
Import 35 is passed through nitrogen into crucible 3, so that metal bath surface surface is full of nitrogen, then is lifted up vacuum (-tight) housing by cylinder 36
33, after vacuum (-tight) housing 33 lifts, the realization of rotation manual turntable 32 topples over operation to 3 inner metal liquid body of crucible.
Claims (7)
1. a kind of convenient type vacuum melting furnace characterized by comprising support frame (21)；
Furnace body (1) is connected by rotating device with support frame (21), passes through bracket system support crucible (3) inside furnace body (1),
Crucible (3) outer surface sets gradually packing layer (4), induction coil (5) and magnetic yoke (6)；
Furnace body (1) side wall is provided with for carrying out cooling lower part water cooling plant to induction coil (5)；
Furnace body (1) upper end is fastenedly connected upper cover (2), and upper cover (2) and furnace body (1) top are sealed by the first sealing ring (8)
Connection, furnace body (1) top is provided with for carrying out cooling top water cooling plant (7) to the first sealing ring (8) and upper cover (2)；
The fixed-type fire door retaining ring (24) of upper cover (2) inner ring, molding fire door retaining ring (24) upper end setting molding converter nose (25)；
Cylinder (36) are installed at the top of support frame as described above (21), the piston rod of cylinder (36) and the pressure foot at the top of vacuum (-tight) housing (33)
(34) it is connected, the second sealing ring (23) is set in the flange groove of vacuum (-tight) housing (33) lower end surface, realizes that vacuum (-tight) housing (33) seal
It is pressed in upper cover (2) surface；
The air flue radially extended is provided on the upper cover (2), air flue inner end extends to crucible through molding fire door retaining ring (24)
(3) at the upper end of inner cavity.
2. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: the upper end of the furnace body (1) is provided with
Portion's connecting flange (1-1), the sleeve (2-1) that upper cover (2) bottom surface is provided with integrally connected and extends straight down, the first sealing ring
(8) it is set at the faying face of top connecting flange (1-1) and sleeve (2-1)；The top water cooling plant (7) includes being set to
The water cooled pipeline of top connecting flange (1-1) inner wall, water cooled pipeline are connected with water inlet pipe and outlet pipe, the water inlet pipe, water outlet
The outer end of pipe all extends on the outside of furnace body (1).
3. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: the lower part water cooling plant includes molding sleeve
(10), molding sleeve (10) is fixed on furnace body (1) side wall, and molding sleeve (10) is respectively set close to induction coil (5) one end and outer end
Epoxy fixed plate (11), the molding sleeve (10) is interior to be arranged two cooling water energization copper pipes, and the inner end of cooling water energization copper pipe is passed through
It wears interior pendant epoxies fixed plate and is connected with the connecting copper pipe of induction coil (5), outside is run through in the outer end of cold cooling water energization bobbin
Epoxy fixed plate, and be connected with external water power cable, molding sleeve (10) is by pouring the epoxy resin for casting from epoxy fixed plate inner cavity
Realize that insulated enclosure is fixed.
4. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: the rotating device includes two solid respectively
Due to the support tube axis (9) of furnace body (1) outer surface radially opposite sides, the support tube axis (9) and support frame (21) are rotatablely connected,
In the axial outer end of a support tube axis be fixedly connected the first sprocket wheel (20), support frame is further fixed on sprocket shaft, sprocket wheel on (21)
Rotation setting the second sprocket wheel (26) on axis is connected between first sprocket wheel (20) and the second sprocket wheel (26) by chain (27) tensioning
It connects, another support tube axis is set in the support sleeve of support frame (21).
5. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: the bracket system includes forming furnace bottom
(13), forming furnace bottom (13) bottom surface sets gradually limit sleeve (14), support base (15), and the support base (15) is supported in drop-bottom
(16) on, drop-bottom (16) is fixed on furnace body (1) lower end, and the region that support base (15) are crowded around is corresponded on the drop-bottom (16)
Through-hole is set, and through hole is tightly connected furnace bottom sealing plate (17).
6. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: the vacuum (-tight) housing (33) is also equipped with
Lifting and guiding device, lifting and guiding device include the guide rail being fixed on support frame (21) and are set to vacuum (-tight) housing (33) surface
Idler wheel, the idler wheel are matched with guide rail.
7. convenient type vacuum melting furnace as described in claim 1, it is characterised in that: be additionally provided on the vacuum (-tight) housing (33) true
Blank pipe (31), to carry out vacuumizing operation to vacuum (-tight) housing (33) is interior；Pressure foot (34) are set at the top of vacuum (-tight) housing (33), cylinder (36)
Tailpiece of the piston rod be connected with pressure foot (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910603656.5A CN110207492A (en) | 2019-07-05 | 2019-07-05 | Convenient type vacuum melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910603656.5A CN110207492A (en) | 2019-07-05 | 2019-07-05 | Convenient type vacuum melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110207492A true CN110207492A (en) | 2019-09-06 |
Family
ID=67796375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910603656.5A Pending CN110207492A (en) | 2019-07-05 | 2019-07-05 | Convenient type vacuum melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110207492A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015241A (en) * | 2017-12-21 | 2018-05-11 | 无锡刚正精密吸铸有限公司 | A kind of quick processing device of copper rod |
| CN112964060A (en) * | 2021-04-01 | 2021-06-15 | 山东电航电力设备科技有限公司 | Low-energy-consumption vacuum induction master alloy smelting furnace |
| CN117287966A (en) * | 2023-11-27 | 2023-12-26 | 四川威纳尔特种电子材料有限公司 | Smelting device and method for efficiently forming and producing blank pup joint for bonding wire |
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| CN202547371U (en) * | 2012-04-23 | 2012-11-21 | 洛阳八佳电气科技股份有限公司 | Furnace turnover mechanism in vacuum induction melting furnace |
| CN202898046U (en) * | 2012-11-09 | 2013-04-24 | 朱兴发 | Fusion vacuum treatment furnace for producing 6N-level solar grade polysilicon |
| CN206952137U (en) * | 2017-07-20 | 2018-02-02 | 无锡夕阳康科技有限公司 | One kind casting equipment |
| CN207713797U (en) * | 2017-12-29 | 2018-08-10 | 南京梦和电子科技有限公司 | A kind of vacuum smelting furnace with water cooled electrode |
| CN210741069U (en) * | 2019-07-05 | 2020-06-12 | 无锡刚正精密吸铸有限公司 | Simple vacuum smelting furnace |
-
2019
- 2019-07-05 CN CN201910603656.5A patent/CN110207492A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202547371U (en) * | 2012-04-23 | 2012-11-21 | 洛阳八佳电气科技股份有限公司 | Furnace turnover mechanism in vacuum induction melting furnace |
| CN202898046U (en) * | 2012-11-09 | 2013-04-24 | 朱兴发 | Fusion vacuum treatment furnace for producing 6N-level solar grade polysilicon |
| CN206952137U (en) * | 2017-07-20 | 2018-02-02 | 无锡夕阳康科技有限公司 | One kind casting equipment |
| CN207713797U (en) * | 2017-12-29 | 2018-08-10 | 南京梦和电子科技有限公司 | A kind of vacuum smelting furnace with water cooled electrode |
| CN210741069U (en) * | 2019-07-05 | 2020-06-12 | 无锡刚正精密吸铸有限公司 | Simple vacuum smelting furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015241A (en) * | 2017-12-21 | 2018-05-11 | 无锡刚正精密吸铸有限公司 | A kind of quick processing device of copper rod |
| CN112964060A (en) * | 2021-04-01 | 2021-06-15 | 山东电航电力设备科技有限公司 | Low-energy-consumption vacuum induction master alloy smelting furnace |
| CN117287966A (en) * | 2023-11-27 | 2023-12-26 | 四川威纳尔特种电子材料有限公司 | Smelting device and method for efficiently forming and producing blank pup joint for bonding wire |
| CN117287966B (en) * | 2023-11-27 | 2024-01-23 | 四川威纳尔特种电子材料有限公司 | Smelting device and method for efficiently forming and producing blank pup joint for bonding wire |
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