CN210755115U - Heat preservation device for aluminum alloy sand casting - Google Patents
Heat preservation device for aluminum alloy sand casting Download PDFInfo
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- CN210755115U CN210755115U CN201921954923.5U CN201921954923U CN210755115U CN 210755115 U CN210755115 U CN 210755115U CN 201921954923 U CN201921954923 U CN 201921954923U CN 210755115 U CN210755115 U CN 210755115U
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- heat preservation
- aluminum alloy
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Abstract
The utility model relates to the field of casting technology, especially a heat preservation device for aluminum alloy sand casting, make the inorganic salt high temperature phase change material phase change heat storage of arranging in the corrosion-resistant container of stainless steel through heating element, utilize thermocouple and accuse temperature appearance control temperature, the corrosion-resistant container of stainless steel is covered by the heat preservation cover, avoid the molding sand to fall into, the welding has the stainless steel stick on its outer wall, heat transfer area has both been increased, also can use with the heated board cooperation, let the heat from appointed face conduction, make the casting mould of thin wall department keep higher temperature, reduce the temperature difference with the metal liquid, thereby make metal liquid cooling speed slow down, avoid producing in thin wall department and water not enough, defects such as cold shut, guarantee casting quality.
Description
Technical Field
The utility model belongs to the technical field of the casting, concretely relates to be used for as cast heat preservation device of aluminum alloy sand mould.
Background
The cast aluminum alloy is usually used for manufacturing some complex thin-wall parts in sand casting due to the characteristics of good fluidity and high specific strength, while in the common sand casting, the heat of aluminum liquid is quickly lost at the thin-wall part, so that the defects of insufficient casting, cold shut and the like are easily generated, and if the difference of the cooling solidification speeds of the thick wall and the thin wall is large, thermal stress is easily generated at the joint of the thick wall and the thin wall, so that the casting is cracked, the quality of the casting is reduced, and the casting can be scrapped in severe cases. Therefore, a device capable of slowing down the cooling solidification speed of the molten metal at the thin wall is needed.
Chinese utility model patent with publication number CN202126198U discloses a high temperature phase change heat storage core device, which utilizes inorganic salt high temperature phase change material to store heat, and has simple operation, low cost and high heat storage and discharge efficiency. However, if this device is applied to sand casting, the following disadvantages are apparent: (1) the device structure is not suitable for sand casting, the device exchanges heat through gas, the heat exchange between the gas and the casting mold is difficult to realize in the casting mold, and the molding sand is easy to fall into the device when in use, thereby affecting the performance of the device; (2) the heating element and the lead of the thermocouple can be directly placed in the casting mould and cannot be protected, and the casting mould is very high in temperature during casting, so that the lead is very easy to burn out, and the device cannot be used; (3) at the thin wall position of foundry goods, often only need one to two face keep warm can, and the device can give off heat to all around, will certainly cause the waste of heat, increase cost.
Disclosure of Invention
An object of the utility model is to solve above-mentioned prior art's problem and not enough, provide one kind and be applicable to cast aluminium alloy sand casting can make the high temperature phase change material heat accumulation in the anti-corrosion container through heating element to the casting mould that makes the thin wall position through heat-conduction keeps higher temperature, plays the heat preservation device that slows down thin wall department metal liquid cooling solidification speed.
The technical scheme of the utility model is that: a heat preservation device for aluminum alloy sand casting comprises a heat preservation cover, a heat preservation guide pipe, a heat preservation plate, a stainless steel corrosion-resistant container, a heating element, a thermocouple, a temperature controller and an inorganic salt high-temperature phase change material, wherein the heating element is arranged in a hollow steel pipe with a closed bottom in the center of the stainless steel corrosion-resistant container, the inorganic salt high-temperature phase change material is arranged in the stainless steel corrosion-resistant container, a temperature measuring end of the thermocouple is sleeved with a protection pipe and is arranged in the phase change material, the other end of the thermocouple is connected with the temperature controller to control the temperature, the upper part of the whole stainless steel corrosion-resistant container is covered by the heat preservation cover, a lead of the thermocouple and the heating element is led out through the heat preservation guide pipe on the heat preservation cover, a stainless steel bar is welded on the outer wall of the stainless steel corrosion-resistant container, a hole is arranged at a corresponding position on the heat preservation plate, the heat preservation cover, the heat preservation conduit and the heat preservation plate are made of high-temperature-resistant heat preservation materials.
The heat preservation device for aluminum alloy sand casting is characterized in that at least two stainless steel rods are welded on each surface of the outer wall of the stainless steel corrosion-resistant container.
The heat preservation device for the aluminum alloy sand casting is characterized in that the heat preservation guide pipe can rotate.
The heat preservation device for aluminum alloy sand casting is characterized in that the inorganic salt high-temperature phase change material is ternary mixed salt of potassium carbonate, sodium carbonate and lithium carbonate or ternary mixed salt of sodium chloride, potassium chloride and anhydrous magnesium chloride.
The heat preservation device for the aluminum alloy sand casting is characterized in that the high-temperature-resistant heat preservation material is aluminum silicate.
The beneficial effects of the utility model reside in that: the inorganic salt high-temperature phase change heat storage material firstly absorbs the heat of the heating element and transfers heat from inside to outside, so that the casting mold keeps higher temperature, the temperature difference between the molten metal and the environment is reduced, and the cooling solidification speed of the molten metal is further reduced; the outer wall of the stainless steel corrosion-resistant container is directly contacted with the molding sand, so that the heat conduction speed is high; the stainless steel bar is welded on the outer wall of the stainless steel corrosion-resistant container, so that the heat transfer area between the stainless steel corrosion-resistant container and the molding sand is increased, and the strength of the casting mold can be improved; the bottom of the hollow steel pipe of the stainless steel corrosion resistant container, in which the heating element is inserted, is closed, and the upper part of the hollow steel pipe is covered by the heat-insulating cover, so that molding sand can be prevented from falling into the hollow steel pipe to influence the performance of the device during molding; the lead wires of the thermocouple and the heating element are led out through the heat-insulating guide pipe on the heat-insulating cover, so that the lead wires are prevented from being burnt out at an excessively high temperature, and meanwhile, the heat-insulating guide pipe can rotate, so that the lead wires can be conveniently led out of the casting mold; the stainless steel corrosion resistant container is matched with the heat insulation plate, so that heat can be conducted from a specified surface, and heat waste is reduced.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a schematic cross-sectional view of the corrosion resistant stainless steel container of the present invention.
Fig. 3 is an assembly view of the present invention in use.
In the above drawings, names of the reference numerals correspond to the following components:
1-heat preservation conduit, 2-heat preservation cover, 3-thermocouple, 4-stainless steel corrosion resistant container, 5-stainless steel bar, 6-heat preservation plate, 7-heating element, 8-temperature control instrument, 9-sand box, 10-cavity, 11-casting mold, and 12-air outlet.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 and 2, the utility model relates to a heat preservation device for aluminum alloy sand casting, which comprises a heat preservation conduit 1, a heat preservation cover 2, a thermocouple 3, a stainless steel corrosion resistant container 4, a heat preservation plate 6, a heating element 7, a temperature control instrument 8 and an inorganic salt high temperature phase change material, wherein the heating element 7 is arranged in a hollow steel pipe with a closed bottom at the center of the stainless steel corrosion resistant container 4, the inorganic salt high temperature phase change material is arranged in the stainless steel corrosion resistant container 4, a protection pipe is sleeved at the temperature measurement end of the thermocouple 3 and is arranged in the phase change material, and the other end of the thermocouple 3 is connected with the temperature control instrument 8 to control the temperature; the upper portion of the whole stainless steel corrosion-resistant container 4 is covered by the heat-insulating cover 2, the thermocouple 3 and the wire of the heating element 7 are led out through the heat-insulating guide pipe 1 on the heat-insulating cover 2, a stainless steel rod is welded on the outer wall of the stainless steel corrosion-resistant container 4, holes are arranged at corresponding positions on the heat-insulating plate 6 and can be attached to the outer wall of the stainless steel corrosion-resistant container 4, the melting point of the inorganic salt high-temperature phase-change material is lower than that of an applied aluminum alloy, and the heat-insulating cover 2, the heat-insulating guide pipe 1 and the heat-insulating.
As shown in fig. 3, an electronic scale is firstly used according to the mass ratio of 3: 6: 1, respectively weighing potassium carbonate, sodium carbonate and lithium carbonate or weighing the components according to a mass ratio of 3: 5: 2 weigh sodium chloride, anhydrous magnesium chloride and potassium chloride respectively, stir the intensive back, pour into stainless steel corrosion resistant container 4, the device that has made up is for use, secondly confirm that stainless steel corrosion resistant container 4 will carry out heat-conducting face, cover other faces with heated board 6, when modelling, will the utility model discloses put at the thin wall position that needs the heat preservation and have left the sand eating volume, thermocouple 3 and heating element 7's wire is drawn forth through heat preservation pipe 1 on the cover 2 that keeps warm, and heat preservation pipe 1 rotates to suitable direction, draws forth the wire from exhaust hole 12 on nearest sand box 9, switches on the power earlier before the pouring, and the control temperature makes inorganic salt high temperature phase change material melt the heat accumulation to make casting mould 11 temperature rise and keep higher temperature through heat-conduction, reduce the temperature difference of metal liquid and environment, thereby slow down the cooling of metal liquid, play the heat preservation effect.
Claims (6)
1. A heat preservation device for aluminum alloy sand casting comprises a heat preservation cover, a heat preservation guide pipe, a heat preservation plate, a stainless steel corrosion-resistant container, a heating element, a thermocouple, a temperature control instrument and an inorganic salt high-temperature phase change material, wherein the heating element is arranged in a hollow steel pipe with a closed bottom in the center of the stainless steel corrosion-resistant container; the method is characterized in that: the upper part of the whole stainless steel corrosion-resistant container is covered by a heat-insulating cover, the thermocouple and the lead of the heating element are led out through a heat-insulating guide pipe on the heat-insulating cover, a stainless steel rod is welded on the outer wall of the stainless steel corrosion-resistant container, holes are arranged at corresponding positions on the heat-insulating plate and can be attached to the outer wall of the stainless steel corrosion-resistant container, the melting point of the inorganic salt high-temperature phase-change material is lower than that of the applied aluminum alloy, and the heat-insulating cover, the heat-insulating guide pipe and the heat-insulating plate.
2. A thermal insulating apparatus for sand casting of aluminum alloy according to claim 1, wherein at least two stainless steel rods are welded to each surface of the outer wall of said stainless steel corrosion resistant vessel.
3. An insulation apparatus for sand casting of aluminum alloy according to claim 1, wherein said insulation duct is rotatable.
4. The heat preservation device for aluminum alloy sand casting according to claim 1, characterized in that the inorganic salt high-temperature phase change material is a ternary mixed salt of potassium carbonate, sodium carbonate and lithium carbonate.
5. The heat preservation device for aluminum alloy sand casting according to claim 1, characterized in that the inorganic salt high-temperature phase change material is a ternary mixed salt of sodium chloride, potassium chloride and anhydrous magnesium chloride.
6. The heat-insulating device for the sand casting of the aluminum alloy according to claim 1, wherein the high-temperature-resistant heat-insulating material is aluminum silicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921954923.5U CN210755115U (en) | 2019-11-13 | 2019-11-13 | Heat preservation device for aluminum alloy sand casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921954923.5U CN210755115U (en) | 2019-11-13 | 2019-11-13 | Heat preservation device for aluminum alloy sand casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210755115U true CN210755115U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921954923.5U Expired - Fee Related CN210755115U (en) | 2019-11-13 | 2019-11-13 | Heat preservation device for aluminum alloy sand casting |
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| Country | Link |
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| CN (1) | CN210755115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214799A (en) * | 2021-05-20 | 2021-08-06 | 合肥工业大学 | Use method of composite phase change material in copper-steel bimetal casting process |
-
2019
- 2019-11-13 CN CN201921954923.5U patent/CN210755115U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214799A (en) * | 2021-05-20 | 2021-08-06 | 合肥工业大学 | Use method of composite phase change material in copper-steel bimetal casting process |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 Termination date: 20201113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |