CN211840102U - Double-layer graphite mould for casting furnace - Google Patents
Double-layer graphite mould for casting furnace Download PDFInfo
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- CN211840102U CN211840102U CN202020057753.7U CN202020057753U CN211840102U CN 211840102 U CN211840102 U CN 211840102U CN 202020057753 U CN202020057753 U CN 202020057753U CN 211840102 U CN211840102 U CN 211840102U
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Abstract
The utility model belongs to the technical field of precious metal casting, in particular to a double-layer graphite mould for a casting furnace, which comprises a cover body; the cover body covers the first layer of mould; the bottom of the first layer of mould covers the second layer of mould; wherein the cover body, the first layer of mould and the second layer of mould form a sealed space. The utility model discloses can decide graphite mold's founding noble metal ingot quantity according to the size of founding stove, practice thrift casting time, improve founding efficiency.
Description
Technical Field
The utility model belongs to the technical field of the noble metal founding, concretely relates to double-deck graphite mould for founding furnace.
Background
Vacuum melting furnaces are often used in the precious metal industry to produce precious metal ingots. In the vacuum casting furnace, high-frequency heavy current flows to be wound into an annular heating coil under the power-on state, and strong magnetic beams with instantly changed polarities are generated in the coil. When a noble metal object to be heated is placed in a graphite mold closed in a coil, the magnetic flux penetrates the entire object to be heated, and a corresponding eddy current is generated in the object to be heated in a direction opposite to the heating current. Since the resistance exists in the object to be heated, a large amount of joule heat is generated, and the temperature of the object itself rapidly rises to reach the temperature at which the precious metal material is heated and melted.
When the noble metal is smelted at high temperature, the smelting chamber is automatically pumped to a vacuum state by the casting furnace, and inert gas is filled in the vacuum environment for protective smelting, so that the oxidation and shrinkage of noble metal ingots and the generation of surface ripples and air holes can be avoided, and the loss of noble metal raw materials can be greatly reduced. The die used by the noble metal vacuum casting furnace can cast a small number of noble metal ingots each time, the casting is time-consuming, and the casting efficiency is low.
In order to solve the problem, the utility model provides a double-layer graphite mould for casting furnace.
SUMMERY OF THE UTILITY MODEL
The utility model provides a double-layer graphite mould for a casting furnace, which solves the technical defects and deficiencies in the prior art.
The utility model also aims at providing a double-deck graphite mould for founding furnace, its founding noble metal ingot quantity that can decide graphite mould according to the size of founding furnace practices thrift the casting time, improves founding efficiency.
An object of the present invention is to solve at least the above-mentioned problems and/or disadvantages of the prior art and to provide at least the advantages which will be described later.
In order to achieve these objects and other advantages in accordance with the purpose of the invention, the present invention provides a double-layered graphite mold for a casting furnace, comprising:
a cover body;
the cover body covers the first layer of mould;
the bottom of the first layer of mould covers the second layer of mould;
wherein the cover body, the first layer of mould and the second layer of mould form a sealed space.
The first layer of mould and the second layer of mould are in a sealed state in the casting process, so that the mould cavity is isolated from outside flowing air flow, and the oxidation and shrinkage of the noble metal ingot and the generation of surface ripples and air holes are avoided.
Preferably, a plurality of first die cavities are arranged on the first layer of die, a plurality of second die cavities are arranged on the second layer of die, and the first die cavities and the second die cavities are of semi-closed structures with openings at the upper ends.
The first layer of mould provided by the utility model is not only the mould cavity of the upper layer of mould but also the mould cover of the lower layer of mould, which can fully utilize the hearth space of the vacuum casting furnace, save mould materials and improve casting efficiency;
preferably, the bottom of the cover body is provided with a plurality of first male dies, the first male dies correspond to the first die cavities one to one, and the first male dies are clamped into openings in the first die cavities.
The first male die is beneficial to quickly covering and sealing the cover body and the first die cavity.
Preferably, the bottom of the first layer of die is provided with a plurality of second male dies, the second male dies correspond to the second die cavities one by one, and the second male dies are clamped into openings in the second die cavities.
The second male die is beneficial to quickly covering and sealing the first layer die and the second die cavity.
Preferably, the mould further comprises clamping grooves, and the side surfaces of the cover body, the first layer of mould and the second layer of mould are provided with the clamping grooves.
The surface temperature of the graphite mold after vacuum casting is about 250 ℃, the mold needs to be taken out by a metal clamp, and the clamping force of the metal clamp can be increased through the clamping groove, so that the mold is conveniently taken and placed by the metal clamp.
Preferably, the first mould cavity and the second mould cavity are both provided with chamfers.
Chamfers are arranged in the first die cavity and the second die cavity, so that demoulding is convenient after the precious metal ingot is cast.
Preferably, the plurality of first cavities is four first cavities, and the plurality of second cavities is four second cavities.
Preferably, the cover body, the first layer of mold and the second layer of mold are all made of graphite.
The beneficial effects of the utility model
1. The utility model provides a double-deck graphite jig for founding furnace, its first layer mould be the die cavity of upper mould again the mould lid of lower floor's mould, can not only save mould raw and other materials, can also make full use of vacuum founding furnace's furnace space, save mould material, improve founding efficiency.
2. The utility model provides a double-deck graphite mould is used to founding furnace, the first terrace die and the second terrace die of its adoption are favorable to the mould to close fast and sealed to it is isolated with external mobile air current to make the die cavity.
3. The utility model provides a double-deck graphite jig for founding furnace, the draw-in groove of its adoption can increase metal anchor clamps's clamp power, makes things convenient for metal anchor clamps to get and puts the mould.
4. The utility model provides a double-deck graphite mould for founding furnace, its simple structure, founding are efficient, and use manpower sparingly, change in using widely.
Drawings
FIG. 1 is a schematic structural view of a double-layer graphite mold for a casting furnace according to the present invention;
FIG. 2 is a front view of a double-layered graphite mold for a casting furnace according to the present invention;
fig. 3 is a front sectional view of a first layer mold according to the present invention;
the method comprises the following steps of 1-cover body, 2-first layer of mould, 3-second layer of mould, 4-first mould cavity, 5-second mould cavity, 6-first male mould, 7-second male mould, 8-clamping groove and 9-chamfer angle.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It should be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The utility model relates to a double-deck graphite mould for founding furnace, as shown in figure 1 and figure 2, include:
a cover body 1;
the first layer of mould 2 is covered by the cover body 1;
the bottom of the first layer of mould 2 is covered on the second layer of mould 3;
wherein, the cover body 1, the first layer of mould 2 and the second layer of mould 3 form a sealed space.
The first layer of mould 2 and the second layer of mould 3 are in a sealed state in the casting process, so that the mould cavity is isolated from outside flowing air flow, and the oxidation and shrinkage of noble metal ingots and the generation of surface ripples and air holes are avoided.
On the basis of the above situation, specifically, as shown in fig. 3, a plurality of first mold cavities 4 are provided on the first layer mold 2, a plurality of second mold cavities 5 are provided on the second layer mold 3, and the first mold cavities 4 and the second mold cavities 5 are both of a semi-closed structure with an opening at an upper end.
The utility model provides a first layer mould 2 is not only the die cavity of upper mould but also the mould lid of lower floor's mould, can not only save mould raw and other materials, can also make full use of vacuum fusion casting stove the furnace space, save mould material, improve fusion casting efficiency. In addition, the first die cavity and the second die cavity are in a sealed state in the casting process.
On the basis of the above situation, specifically, as shown in fig. 3, a plurality of second male dies 7 are arranged at the bottom of the first layer die 2, the second male dies 7 correspond to the second die cavities 5 one to one, and the second male dies 7 are clamped into openings on the second die cavities 5.
The second male die 7 is beneficial to quickly covering and sealing the first layer of die 2 and the second die cavity 5, so that the die cavity is isolated from outside flowing air flow, and the oxidation and shrinkage of a noble metal ingot and the generation of surface ripples and air holes are avoided.
Furthermore, specifically, as shown in fig. 2, a plurality of first male dies 6 are arranged at the bottom of the cover body 1, the first male dies 6 correspond to the first die cavities 4 one by one, and the first male dies 6 are clamped into openings of the first die cavities 4.
The first male die 6 is beneficial to fast covering and sealing of the cover body 1 and the first die cavity 4, so that the die cavity is isolated from outside flowing air flow, and oxidation and shrinkage of precious metal ingots and generation of surface ripples and air holes are avoided.
Specifically, as shown in fig. 1, the mold further includes a clamping groove 8, and the clamping grooves 8 are disposed on the side surfaces of the cover 1, the first layer of mold 2, and the second layer of mold 3.
The surface temperature of the graphite mold after vacuum casting is about 250 ℃, the mold needs to be taken out by a metal clamp, and the clamping force of the metal clamp can be increased through the clamping groove, so that the mold is conveniently taken and placed by the metal clamp.
Specifically, as shown in fig. 2, the first mold cavity and the second mold cavity are both provided with chamfers 9. Chamfers are arranged in the first die cavity and the second die cavity, so that demoulding is convenient after the precious metal ingot is cast. The utility model discloses well selection the radius of chamfer is 3 mm.
One embodiment of the present invention is that the number of the first mold cavities is four, and the number of the second mold cavities is four, as shown in fig. 1 and 2. Therefore, the double-layer graphite mold can melt 8 pieces of 1Kg of noble metal ingots in each batch, and the production efficiency of the single-layer graphite mold is doubled within the same energy consumption and the same time of the melting furnace.
Additionally, the utility model provides a lid the first layer mould with the second floor mould is the graphite material.
The utility model provides a double-layer graphite mould for noble metal vacuum casting furnace, which comprises a cover body, a first layer mould (middle layer mould) and a second layer mould (bottom layer mould), wherein the middle layer mould is not only a mould cavity of the upper layer mould but also a mould cover of the lower layer mould, can fully utilize the hearth space of the vacuum casting furnace, save mould materials and improve casting efficiency; the mold clamping slot is used for taking and placing a mold in the furnace chamber; the mold chamfer is beneficial to demolding of the noble metal ingot.
Of course, the multilayer mould can be selected according to the volume of the casting furnace, and the number of the mould cavities on the mould can be selected according to specific conditions.
The working principle of the present invention is illustrated with the embodiment of fig. 1: during operation, precious metal ingots needing casting are sequentially placed into the first die cavity and the second die cavity, then the first layer of dies is sequentially covered on the second layer of dies, the first layer of dies is downwards pressed with a certain force, the first male die at the bottom end of the first layer of dies is clamped into the opening of the second die cavity, the second die cavity is sealed, then the cover body is covered on the first layer of dies, the cover body is downwards pressed with a certain force, the second male die at the bottom end of the cover body is clamped into the opening of the first die cavity, the first die cavity is sealed, then the cover body is placed into the casting furnace, the casting furnace is opened, the casting furnace is enabled to work and operate under vacuum, and after a certain period of time is set, the dies are taken out by the metal clamps.
To sum up, the utility model provides a double-deck graphite mould for founding furnace, its simple structure, founding are efficient, and use manpower sparingly, change in using widely.
The utility model provides a concrete example demonstrates, adopts this double-deck graphite mould to carry out the vacuum fusion casting of gold 1Kg standard gold ingot. The inner size of the furnace chamber of the gold vacuum casting furnace is 300 multiplied by 160 multiplied by 110mm, and the outer overall size of the double-layer mold is designed to be 279 multiplied by 143 multiplied by 87 mm. The standard 1Kg gold ingot delivered by Shanghai gold exchange has the specification length of 115 +/-1 mm and the width of 52.5 +/-1 mm, the sizes of a first die cavity and a second die cavity of a designed graphite die are respectively 116.5 multiplied by 53 multiplied by 23mm and the chamfer radius is 3mm, and the sizes of a male die of a die cover are respectively 115.5 multiplied by 52 multiplied by 3mm and the chamfer radius is 3 mm.
Weighing 1Kg of gold raw material with the purity of 99.99 percent respectively, putting the gold raw material into each die cavity, and covering a graphite cover. And then, moving the mold into a vacuum casting furnace by using a mold clamp, opening a power supply of the casting furnace, vacuumizing, filling argon, heating for 10 minutes under the protection of the argon at the power of 35kw, then cooling for 12 minutes by water, and taking out the mold. 8 standard gold ingots with smooth and bright surfaces, no air holes and high density can be obtained.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. A double-layer graphite mold for a casting furnace is characterized by comprising:
a cover body;
the cover body covers the first layer of mould;
the bottom of the first layer of mould covers the second layer of mould;
wherein the cover body, the first layer of mould and the second layer of mould form a sealed space.
2. The double-layered graphite mold for casting furnace as claimed in claim 1, wherein the first-layer mold is provided with a plurality of first cavities, the second-layer mold is provided with a plurality of second cavities, and the first cavities and the second cavities are semi-closed structures each having an opening at an upper end.
3. The double-layered graphite mold for casting furnace as claimed in claim 2, wherein the bottom of the cover body is provided with a plurality of first punches which correspond one-to-one to the first cavity and are fitted into the openings of the first cavity.
4. The double-layered graphite mold for casting furnace as claimed in claim 2, wherein the bottom of the first-layered mold is provided with a plurality of second punches which correspond one-to-one to the second cavities and are fitted into the openings of the second cavities.
5. The double-layered graphite mold for the casting furnace as claimed in claim 1, further comprising locking grooves, wherein the locking grooves are formed on the side surfaces of the cover, the first layer mold and the second layer mold.
6. The double-layered graphite mold for casting furnace as claimed in claim 2, wherein the first cavity and the second cavity are each provided with a chamfer.
7. The double-layered graphite mold for a casting furnace as claimed in claim 2, wherein the plurality of first cavities is four first cavities and the plurality of second cavities is four second cavities.
8. The double-layered graphite mold for casting furnace as claimed in any of claims 1 to 7, wherein the cover, the first-layer mold and the second-layer mold are made of graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020057753.7U CN211840102U (en) | 2020-01-13 | 2020-01-13 | Double-layer graphite mould for casting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020057753.7U CN211840102U (en) | 2020-01-13 | 2020-01-13 | Double-layer graphite mould for casting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211840102U true CN211840102U (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020057753.7U Active CN211840102U (en) | 2020-01-13 | 2020-01-13 | Double-layer graphite mould for casting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211840102U (en) |
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2020
- 2020-01-13 CN CN202020057753.7U patent/CN211840102U/en active Active
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