CN106475546B - Double-shell die casting furnace - Google Patents
Double-shell die casting furnace Download PDFInfo
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- CN106475546B CN106475546B CN201510564497.4A CN201510564497A CN106475546B CN 106475546 B CN106475546 B CN 106475546B CN 201510564497 A CN201510564497 A CN 201510564497A CN 106475546 B CN106475546 B CN 106475546B
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Abstract
The invention relates to a double-shell die-casting furnace, which relates to hub die-casting, and comprises a body and is characterized in that: casing, furnace lining, air flue, heat accumulator, electric heat body, electric heat sleeve pipe, its characterized in that: an inner shell (11) and an outer shell (12) are formed on the shell, a heat insulation layer (2) is formed between the inner shell (11) and the outer shell (12), a furnace lining (3) is formed on the inner side of the inner shell (11), a hearth space is formed in the furnace lining (3), and a bulge (8) is formed below a furnace opening (6) of the hearth space; the distribution bin (13) is formed on two outer sides of the inner shell (11), the distribution bin (13) is arranged in a closed mode, a sealing sleeve (7) is arranged in the distribution bin (13) and penetrates through the distribution bin (13) and the furnace lining (3), a sleeve (9) is arranged in the sealing sleeve (7) and is inserted into molten aluminum (14) in the hearth through the sealing sleeve (7), and an electric heating body (10) is arranged in the sleeve (9).
Description
Technical Field
The invention relates to a metallurgical casting furnace, in particular to a hub casting furnace.
Background
The working mode of the hub die-casting furnace is as follows: a mold filling, pressure releasing and mold opening cyclic working mode is adopted for hearth air pressure boosting aluminum liquid, a light heat insulation material is generally adopted for heat insulation of an existing die-casting furnace at present, gas in air holes of the light heat insulation material is compressed during boosting, hearth hot air flow invades the air holes, gas in the air holes of the light heat insulation material expands during pressure releasing, and extra expanded gas flows back into a hearth, and convection heat transfer in the breathing mode is repeated, so that the heat insulation performance of the light heat insulation material is lost, namely the heat insulation performance of the existing common light heat insulation material is completely lost in the die-casting furnace. Therefore, the heat preservation of the existing die-casting furnace is generally low, the surface temperature of the furnace shell is high, the temperature difference gradient between the furnace shell and the hearth is small and is only equal to one half of the temperature of the hearth, and a large amount of heat energy is dissipated through breathing heat conduction.
At present, the heat compensation required by constant temperature of a die-casting furnace is generally converted by adopting electric energy, because a commonly used electric heating body is a silicon carbon product, after the temperature is increased to be above 900 ℃, the line loss is increased, the reactive loss is increased, the effective heat conversion rate of the electric energy is reduced, and the temperature range of the commonly used electric heating body is above 900 ℃; in short, the electric energy can only be partially converted into heat radiation heat, the rest is not lost, and the heat radiation conversion rate of the electric energy is related to the temperature of the electric heating body. The heat energy converted by the electric heating body is transmitted to the position below the aluminum liquid level and is converted into the heat energy of the aluminum liquid, and the electric heating body is a good reflector for heat radiation due to low blackness of the aluminum liquid, so that the high temperature of the electric heating body cannot be avoided. What is more, the aluminum liquid can not directly capture heat radiation to obtain energy, so the main heat energy obtained by the aluminum liquid is heat conduction heat from hot gas, and the heat conduction heat is heat generated by electric energy-conversion-radiant heat-conversion-gas heat-conversion-aluminum liquid heat. The first law of thermodynamics states that different forms of energy can be converted, but energy is conserved during the conversion process. The second law of thermodynamics states that energy is high or low in grade in addition to quantity, and energy of different grades has different capacities of converting into work. The three conversion processes from electric energy to molten aluminum heat are actually high-grade energy and low-grade conversion, and the available power is obtained in a very small amount. Much electric energy leaks out of the transformer and the transmission line because the efficiency of converting the molten aluminum into the heat of the receptor is not high. Therefore, in order to save electric energy, the electric heating body is required to work in a lower-temperature environment, the electric heating body is also required to work in the lower-temperature environment, the electric heating conversion rate is higher, an effective heat insulation layer is provided, and a large amount of useless electric energy consumption is avoided in the process of converting high-grade electric energy into low-grade heat energy.
Disclosure of Invention
The invention aims at the technical problems to be solved and provides a double-shell die-casting furnace.
The invention adopts the following technical scheme. A double shell die casting furnace having a body comprising: casing, furnace lining, air flue, heat accumulator, electric heat body, electric heat sleeve pipe, its characterized in that: an inner shell and an outer shell are formed on the shell, a heat insulation layer is formed between the inner shell and the outer shell, a furnace lining is formed on the inner side of the inner shell, a hearth space is formed in the furnace lining, and a bulge is formed below a hearth opening of the hearth space; the distribution bin is formed on the two outer sides of the inner shell, the distribution bin is sealed, a sealing sleeve is arranged in the distribution bin and penetrates through the distribution bin and the furnace lining, a sleeve pipe in the sealing sleeve is inserted into the aluminum liquid in the hearth through the sealing sleeve, an electric heating body is arranged in the sleeve pipe inserted into the aluminum liquid in the hearth, the front section of the electric heating body is used as a heat source, the sleeve pipe of the heat source electric heating body is inserted into the aluminum liquid, and the pipe wall of the sleeve pipe in the aluminum liquid conducts the electric heating energy of the electric;
the electric heating body is made of carbonaceous materials, the power distribution bin and the sleeve pipe are subjected to vacuum treatment, the power distribution bin and the sleeve pipe after the vacuum treatment are filled with nitrogen, and the nitrogen pressure is greater than the hearth pressure; when the electric heating body is replaced, the air is charged to oxidize the electric heating body to be replaced, and ash is swept to install a new electric heating body;
the sealing sleeve 7 is arranged at the position of a tubular shell between the power distribution bin and the inner shell, and the sealing sleeve and the shell are bonded and sealed by carbon powder and phenolic resin;
the sleeve is arranged in the sealing sleeve, the gap between the sleeve and the sealing sleeve is filled with nano fine powder for sealing, and the gap between the sleeve and the electric heating body arranged in the sleeve is filled with silicon nitride fine powder for increasing the heat transfer effect; the replacement and the removal of the sleeve are realized by cleaning the adhering slag of the exposed part and applying traction force and vibration to slowly pull out the sleeve;
when the die casting furnace is used for liquid filling and aluminum casting, pressurized air flows into the heat accumulator through the air passage to be preheated and then flows into the hearth, and after the casting process is finished, the pressure relief hot air flows through the heat accumulator to be cooled and then is relieved through the air passage.
Dismantling the electric heating body: firstly, pulling out by a traction force and vibration method, and if the electric heater is broken, burning the electric heater by using oxygen-enriched flame or burning the electric heater by using air and oxygen-enriched air for supporting combustion.
Dismantling the sealing sleeve: burning the carbon powder adhesive layer by oxygen-enriched flame, and then pulling out by traction and vibration.
The invention has the following beneficial effects:
one of the beneficial effects is as follows: an effective heat insulation layer is formed between the inner shell and the outer shell, the heat insulation layer is isolated from the space of the closed hearth, the influence of pressure change is thoroughly eliminated, the convection heat transfer in a breathing mode is completely discharged, the heat insulation effect of the furnace shell can reduce the heat loss of the die-casting furnace, and electric energy is saved.
The second beneficial effect is that: the electric heating body is made of carbon materials, the distribution bin is sealed and can be filled with nitrogen to protect the carbon electric heating body, and the resistance of the carbon electric heating body is small in rising amplitude along with temperature change, so that resistance change influenced by temperature change of the hearth is small, and less reactive loss is beneficial to power saving. The electric energy converted heat energy of the electric heating body intruding into the aluminum liquid is directly transmitted to the aluminum liquid, so the environment temperature of the electric heating body is not high, compared with the three-time energy conversion of electric energy-radiant heat-gas heat-aluminum liquid heat, the two-time conversion is eliminated, and the high-grade electric energy is converted and utilized in high grade. The method has the advantages of high efficiency of converting electric energy into heat energy, greatly reducing the temperature of the aluminum liquid surface of the hearth, greatly reducing the amount of aluminum slag converted by aluminum liquid oxidation and improving the metal yield of the aluminum liquid.
The third beneficial effect is: the bulge is formed below the furnace mouth, so that the resistance of molten aluminum cast flow is increased, the disturbance of the kinetic energy of cast flow on the static molten aluminum in the hearth is reduced, and the suction of microscopic impurities into the riser tube is reduced.
The fourth beneficial effect is: the pressurized airflow flows into the heat accumulator through the air passage and flows into the hearth after being preheated, so that the temperature of the furnace top is reduced while the cold gas is preheated, and the heat dissipation loss of the surface of the furnace top is reduced.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of a double shell die casting furnace of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of FIG. 2;
in the drawings. 1 furnace cover 2 insulating layer 3 furnace lining 4 regenerator 6 air flue 6 furnace mouth 7 sealing cover 8 protrusion 9 sleeve 10 electric heater 11 inner shell 12 outer shell 13 distribution bin 14 aluminium liquid.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
Fig. 1-3 show the general configuration of the present invention.
The attached drawing shows that an inner shell 11 and an outer shell 12 are formed on the shell, a heat insulation layer 2 is formed between the inner shell 11 and the outer shell 12, a furnace lining 3 is formed on the inner side of the inner shell 11, a hearth space is formed in the furnace lining 3, and a bulge 8 is formed below a furnace opening 6 of the hearth space; a distribution bin 13 is formed on the two outer sides of the inner shell 11, the distribution bin 13 is arranged in a closed manner, a sealing sleeve 7 is arranged in the distribution bin 13 and penetrates through the distribution bin 13 and the furnace lining 3, a sleeve 9 arranged in the sealing sleeve 7 is inserted into the molten aluminum in the hearth through the sealing sleeve 7, an electric heating body 10 is arranged in the sleeve 9 inserted into the molten aluminum in the hearth, the front section of the electric heating body 10 is used as a heat source, the sleeve 9 of the heat source electric heating body 10 is inserted into the molten aluminum 14, and the pipe wall of the sleeve 9 in the molten aluminum conducts the electric heat energy of the electric;
the electric heating body 10 is made of carbonaceous materials, the power distribution bin 13 and the sleeve 9 are subjected to vacuum treatment, the power distribution bin 13 and the sleeve 9 after the vacuum treatment are filled with nitrogen, and the nitrogen pressure is greater than the pressure of a hearth; when the electric heating body 10 is replaced, the air is charged to oxidize the electric heating body 10 to be replaced, and ash is blown and cleaned to install a new electric heating body 10;
the sealing sleeve 7 is arranged at the position of a tubular shell between the power distribution bin 13 and the inner shell 11, and the sealing sleeve 7 and the shell are bonded and sealed by carbon powder and phenolic resin;
the sleeve 9 is arranged in the sealing sleeve 7, the gap between the sleeve 9 and the sealing sleeve 7 is filled with nano fine powder for sealing, and the gap between the sleeve 9 and the electric heating body 10 arranged in the sleeve 9 is filled with silicon nitride fine powder for increasing the heat transfer effect; the replacement and the removal of the sleeve 9 are realized by cleaning the slag on the exposed part and applying traction force and vibration to slowly pull out the sleeve;
when the die casting furnace is used for liquid filling and aluminum casting, pressurized air flows into the heat accumulator 4 through the air passage 5 to be preheated and then flows into the hearth, and after the casting process is finished, the pressure-released hot air flows through the heat accumulator 4 to be cooled and then is released by the air passage 5.
Dismantling the electric heating body 10: firstly, the electric heating body 10 is pulled out by a traction force and a vibration method, and if the electric heating body is pulled off, the electric heating body is burnt by oxygen-enriched flame or is self-destroyed by air and oxygen-enriched air for supporting combustion.
Dismantling of the sealing sleeve 7: burning the carbon powder adhesive layer by oxygen-enriched flame, and then pulling out by traction and vibration.
Claims (3)
1. A double shell die casting furnace having a body comprising: casing, furnace lining, air flue, heat accumulator, electric heat body, electric heat sleeve pipe, its characterized in that: an inner shell (11) and an outer shell (12) are formed on the shell, a heat insulation layer (2) is formed between the inner shell (11) and the outer shell (12), a furnace lining (3) is formed on the inner side of the inner shell (11), a hearth space is formed in the furnace lining (3), and a bulge (8) is formed below a furnace opening (6) of the hearth space; the distribution bin (13) is formed on the two outer sides of the inner shell (11), the distribution bin (13) is arranged in a closed mode, a sealing sleeve (7) is arranged in the distribution bin (13) and penetrates through the distribution bin (13) and a furnace lining (3), a sleeve (9) arranged in the sealing sleeve (7) is inserted into aluminum liquid in a hearth through the sealing sleeve (7), an electric heating body (10) is arranged in the sleeve (9) inserted into the aluminum liquid in the hearth, the front section of the electric heating body (10) serves as a heat source, the sleeve (9) of the heat source electric heating body (10) is inserted into the aluminum liquid (14), and the inner wall of the sleeve (9) in the aluminum liquid conducts electric heating energy of the electric heating body (10) to the;
the electric heating body (10) is made of carbonaceous materials, the power distribution bin (13) and the sleeve (9) are subjected to vacuum treatment, nitrogen is filled in the power distribution bin (13) and the sleeve (9) after the vacuum treatment, and the pressure of the nitrogen is greater than the pressure of a hearth; when the electric heating body (10) is replaced, air is charged to oxidize the electric heating body (10) to be replaced, ash is blown and cleaned, and a new electric heating body (10) is installed;
the sealing sleeve (7) is arranged at the position of a tubular shell between the power distribution bin (13) and the inner shell (11), and the sealing sleeve (7) and the shell are bonded and sealed by carbon powder and phenolic resin;
the sleeve (9) is arranged in the sealing sleeve (7), the gap between the sleeve (9) and the sealing sleeve (7) is filled with nano fine powder for sealing, and the gap between the sleeve (9) and the electric heating body (10) arranged in the sleeve is filled with silicon nitride fine powder for increasing the heat transfer effect; the replacement and the removal of the sleeve (9) are realized by cleaning the slag on the exposed part and applying traction force and vibration to slowly pull out the sleeve;
when the die casting furnace is used for liquid filling and aluminum casting, pressurized air flows into the heat accumulator (4) through the air passage (5) to be preheated and then flows into the hearth, and after the casting process is finished, the pressure is released, hot air flows through the heat accumulator (4) to be cooled and then is released through the air passage (5).
2. A double shell die casting furnace according to claim 1, wherein: the electric heating body (10) is dismantled: firstly, the electric heating body is pulled out by a traction force and a vibration method, and if the electric heating body (10) is pulled off, the electric heating body is burnt by oxygen-enriched flame or burnt and self-destroyed by air and oxygen-enriched air.
3. A double shell die casting furnace according to claim 1, wherein: dismantling the sealing sleeve (7): burning the carbon powder adhesive layer by oxygen-enriched flame, and then pulling out by traction and vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510564497.4A CN106475546B (en) | 2015-09-01 | 2015-09-01 | Double-shell die casting furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510564497.4A CN106475546B (en) | 2015-09-01 | 2015-09-01 | Double-shell die casting furnace |
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| CN106475546A CN106475546A (en) | 2017-03-08 |
| CN106475546B true CN106475546B (en) | 2020-08-04 |
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| CN201510564497.4A Active CN106475546B (en) | 2015-09-01 | 2015-09-01 | Double-shell die casting furnace |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247465A (en) * | 1984-05-24 | 1985-12-07 | Nippon Kokan Kk <Nkk> | Heater for lining of metallurgical pan |
| CN1140490A (en) * | 1994-12-02 | 1997-01-15 | 川崎制铁株式会社 | Non-oxidizing heating method and apparatus therefor |
| CN1310326A (en) * | 2000-01-25 | 2001-08-29 | 技术资源有限公司 | Method for changing furnace lining |
| CN200952719Y (en) * | 2006-09-15 | 2007-09-26 | 上海埃鲁秘工业炉制造有限公司 | Bright flame type flat-flame gas burner adapted to aluminiumalloy molten liquid heat insulation furnace |
| JP4403452B2 (en) * | 2003-10-16 | 2010-01-27 | 日本坩堝株式会社 | Method of melting the material to be melted |
| CN103353225A (en) * | 2013-07-17 | 2013-10-16 | 绥中伊菲人工晶体科技有限公司 | Molten aluminum heat preserving furnace for high-pressure casting |
| CN203778736U (en) * | 2014-04-09 | 2014-08-20 | 金华天阳压铸有限公司 | Feed holding furnace for aluminum alloy cold chamber die casting machine |
| KR20150000298A (en) * | 2013-06-24 | 2015-01-02 | 현대성우오토모티브코리아 주식회사 | Low pressure die casting machine for casting magnesium |
-
2015
- 2015-09-01 CN CN201510564497.4A patent/CN106475546B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247465A (en) * | 1984-05-24 | 1985-12-07 | Nippon Kokan Kk <Nkk> | Heater for lining of metallurgical pan |
| CN1140490A (en) * | 1994-12-02 | 1997-01-15 | 川崎制铁株式会社 | Non-oxidizing heating method and apparatus therefor |
| CN1310326A (en) * | 2000-01-25 | 2001-08-29 | 技术资源有限公司 | Method for changing furnace lining |
| JP4403452B2 (en) * | 2003-10-16 | 2010-01-27 | 日本坩堝株式会社 | Method of melting the material to be melted |
| CN200952719Y (en) * | 2006-09-15 | 2007-09-26 | 上海埃鲁秘工业炉制造有限公司 | Bright flame type flat-flame gas burner adapted to aluminiumalloy molten liquid heat insulation furnace |
| KR20150000298A (en) * | 2013-06-24 | 2015-01-02 | 현대성우오토모티브코리아 주식회사 | Low pressure die casting machine for casting magnesium |
| CN103353225A (en) * | 2013-07-17 | 2013-10-16 | 绥中伊菲人工晶体科技有限公司 | Molten aluminum heat preserving furnace for high-pressure casting |
| CN203778736U (en) * | 2014-04-09 | 2014-08-20 | 金华天阳压铸有限公司 | Feed holding furnace for aluminum alloy cold chamber die casting machine |
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| CN106475546A (en) | 2017-03-08 |
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Address after: 102600 Yuhongli 2-2-3, Haigang District, Qinhuangdao City, Hebei Province Applicant after: Bian Renjie Address before: 102600 Beijing Daxing District Station North Li 51-8-602 Applicant before: Bian Renjie |
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