KR20180049311A - Vacuum melting apparatus and its method for casting process - Google Patents

Abstract

The present invention relates to a vacuum melting apparatus for a casting process and a method thereof, comprising: a load lock chamber for supplying lightweight metal as much as needed in product formation after measuring the needed amount while maintaining a vacuum state therein after the lightweight metal to be fed is charged; a main chamber sequentially inputted with the lightweight metal supplied from the load lock chamber into a plurality of crucibles, melting the inputted lightweight metal, and tapping the melted lightweight metal; a vacuum member for creating the vacuum state in the load lock chamber and the main chamber; and a heating member for heating the crucibles, thereby capable of improving a casting process efficiency and a casting product quality.

Description

Technical Field [0001] The present invention relates to a vacuum melting apparatus for a casting process,

The present invention relates to a casting method capable of improving the efficiency of a casting process and the quality of a casting product by melting a light metal in a vacuum atmosphere and sequentially injecting a high-quality light-weight metal melt into the casting mold without using a heat- And more particularly, to a vacuum melting apparatus and a method therefor.

As well known, as a representative manufacturing technology capable of efficiently mass production of complex shapes while maintaining high dimensional accuracy in the production of parts for home appliances such as automobiles, shipbuilding, aerospace, and other home appliances such as mobile phones and laptops, Is being developed.

Especially, as the importance of functional aspects such as light weight, high strength, and high temperature stability for transporting machine and home appliance has increased, research and development for high quality maintenance of the quality of light metal such as aluminum and magnesium used in casting Is underway.

Conventionally, casting techniques such as low-pressure, gravity, and high-pressure casting using a lightweight metal are performed by melting and heating a large amount of light metal by using a melting furnace and a warming furnace and by using a ladle as a lightweight Casting products are manufactured by injecting molten metal into a mold.

However, the coagulation of the light metal melt in the melting furnace and the heating furnace may cause a great loss in material and maintenance due to the breakage of the furnace due to fusion with the refractory. In order to continuously manufacture the product, There is a problem that proper level and temperature must be maintained even during operation and downtime.

As a result, the cost of energy consumption for melting a large amount of light metal at a high temperature and maintaining the light metal molten metal at a constant temperature, the cost of depreciation and maintenance cost due to operation of the melting furnace and the thermal insulation furnace, It has been pointed out that a large amount of high-temperature molten metal is operated at all times, deterioration of working environment due to generation of gas and dust, worker safety problems and safety accidents are serious problems.

Further, by maintaining the light metal at a high temperature in a molten state in a melting furnace and a warming furnace which are open to the atmosphere, it is possible to prevent the generation of impurities due to the incorporation of hydrogen gas in the molten metal, the reaction with oxygen and other gases, And gravity segregation, resulting in defects in quality and deterioration of the final castings due to differences in quality depending on the position of the molten metal in the melting furnace and the heating furnace.

1. Registration No. 10-0413920 (registered on December 22, 2003) 2. Open Patent No. 10-2009-0068592 (Published on June 29, 2009)

The present invention improves the casting process efficiency and casting product quality by melting (melting) a light metal in a vacuum atmosphere and sequentially injecting a high-quality light metal melt into the casting mold without using a heat insulating furnace for holding the light metal melt A vacuum melting apparatus for a casting process and a method therefor.

In addition, the present invention is characterized in that a load lock chamber is filled with a light metal to be hot-watered, and then the inner state is maintained in a vacuum atmosphere while measuring the weight of the load lock chamber by a weight necessary for product molding, The molten light metal molten metal melted through the heating member can be prevented from being mixed with the atmospheric gas by successively spouting the molten metal in the main chamber so that mixing of water and gas can be prevented through continuous casting in a vacuum atmosphere, And to provide a vacuum melting apparatus for a casting process capable of manufacturing a high-quality cast product and a method thereof.

In addition, the present invention is characterized in that a plurality of crucibles are arranged and rotated in the order of charging, heating, melting, keeping warm, and spouting, and the molten light metal molten metal is spouted in the main chamber so that charging, heating, melting, The present invention provides a vacuum melting apparatus for a casting process and a method thereof capable of performing sequential casting in a short time by allowing a sequential light metal molten metal to be spouted sequentially.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description .

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, including: a load lock chamber for supplying the light metal by a weight necessary for forming a product while maintaining an internal state in a vacuum atmosphere after a light metal to be hot water is charged; A main chamber in which a light metal is charged into a plurality of crucibles, the light metal being charged is heated and melted, and the melted light metal melt is spouted; a vacuum chamber for forming the inside of the load lock chamber and the main chamber in a vacuum atmosphere; And a heating member for heating the plurality of crucibles, may be provided.

According to an aspect of the present invention, the plurality of crucibles may be provided in a vacuum melting apparatus for a casting process arranged in a turntable manner.

According to an aspect of the present invention, the plurality of crucibles are combined with a rotating and tilting member, and vacuum melting for casting process is carried out in the order of charging, heating, melting, A device may be provided.

According to one aspect of the present invention, the rotary and tilting member may be provided with a vacuum melting apparatus for casting process in which the crucible having the light metal melt to be poured out of the plurality of crucibles is tilted and allowed to spout.

According to one aspect of the present invention, the heating member may be provided with a vacuum melting apparatus for a casting process, which is heated by at least one of a high frequency induction heating method and a resistance heating method.

According to one aspect of the present invention, the vacuum dissolving apparatus for casting further comprises an auxiliary heating member disposed on the top of the plurality of crucibles and further heating by using any one selected from laser, electron beam and plasma torch, A vacuum melting apparatus for a process can be provided.

According to another aspect of the present invention, there is provided a method of manufacturing a light-emitting device, comprising: charging a light-weight metal to be hot-watered into a load-lock chamber; supplying the light-weight metal to the main chamber by a weight necessary for product molding while maintaining the inside of the load- The method comprising the steps of: injecting the light metal supplied from the load lock chamber into a plurality of crucibles provided in the main chamber; melting the light metal by heating through a heating member; And rotating the plurality of crucibles through a plurality of crucibles to spout the light metal molten metal.

According to another aspect of the present invention, there is provided a vacuum dissolving method for a casting process in which the plurality of crucibles are disposed in a turntable manner.

According to another aspect of the present invention, the plurality of crucibles may be provided with a vacuum melting method for a casting process in which charging, heating, melting, keeping warm, and spouting are sequentially carried out with respect to the rotating shaft of the rotating and tilting member.

According to another aspect of the present invention, the step of tapping the light metal molten metal may be provided with a vacuum melting method for the casting step in which the crucible having the light metal molten metal to be poured out of the plurality of crucibles is tilted and tap water is dispensed .

According to another aspect of the present invention, the step of melting the light metal may be provided with a vacuum melting method for casting process for heating through the heating member including at least one of a high frequency induction heating method and a resistance heating method have.

According to another aspect of the present invention, there is provided a method for melting a light metal, comprising the steps of: melting the light metal by using a heating furnace A vacuum dissolving method can be provided.

The present invention relates to a casting method capable of improving the efficiency of a casting process and the quality of a casting product by melting a light metal in a vacuum atmosphere and sequentially injecting a high-quality light-weight metal melt into the casting mold without using a heat- It is possible to provide a vacuum melting apparatus for a process and a method thereof.

In addition, the present invention is characterized in that a load lock chamber is filled with a light metal to be hot-watered, and then the inner state is maintained in a vacuum atmosphere while measuring the weight of the load lock chamber by a weight necessary for product molding, The molten light metal molten metal melted through the heating member can be prevented from being mixed with the atmospheric gas by successively spouting the molten metal in the main chamber so that mixing of water and gas can be prevented through continuous casting in a vacuum atmosphere, Can be improved, and a high-quality cast product can be produced.

In addition, the present invention is characterized in that a plurality of crucibles are arranged and rotated in the order of charging, heating, melting, keeping warm, and spouting, and the molten light metal molten metal is spouted in the main chamber so that charging, heating, melting, The sequential light metal molten metal can be spouted in sequence, and continuous casting can be performed in a short time.

1 to 3 are views illustrating a vacuum dissolving apparatus for a casting process according to an embodiment of the present invention,
FIG. 4 is a flowchart illustrating a vacuum melting method for casting according to another embodiment of the present invention.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are views illustrating a vacuum melting apparatus for a casting process according to an embodiment of the present invention.

1 to 3, a vacuum melting apparatus for a casting process according to an embodiment of the present invention includes a load lock chamber 110, a vacuum member 120, a main chamber 130, a plurality of crucibles 140, A rotation and tilting member 150, a heating member 160, an auxiliary heating member 170, and the like.

The load lock chamber 110 supplies the light metal as much as the weight required for product molding while maintaining the internal state in a vacuum atmosphere after the light metal to be hot water is charged. The inner state can be adjusted to a vacuum atmosphere through the vacuum member 120 in a state where the inside and the outside are closed through the valve 112 and the second open / close valve 114. Here, the light metal may include aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and the like.

The load lock chamber 110 can open the second open / close valve 114 in a vacuum atmosphere and supply the main chamber 130 with a weight (for example, 1 kg, 3 kg, etc.) necessary for product molding. The weight required for molding can be accurately measured through the load cell 116 provided inside.

For example, the input end of the load lock chamber 110 may have a horizontal structure, and a discharge end having the first on-off valve 112 and the second on-off valve 114 (i.e., the main chamber 130) When the lightweight metal is injected into the input end of the load lock chamber 110, the lower end of the horizontal structure is connected to the lower end of the horizontal structure, The weight required for product molding can be measured through the load cell 116 provided.

Then, the weight is transferred horizontally in the horizontal direction by the weight required for product molding, which is measured through the load cell 116, so as to be positioned above the first opening / closing valve 112, and the first opening / closing valve 112 is opened, The lightweight metal as much as the weight necessary for product molding can be charged into the space between the valve 112 and the second opening / closing valve 114.

Thereafter, the first open / close valve 112 is closed, the space between them is adjusted to a vacuum atmosphere, and the second open / close valve 114 is opened to supply lightweight metal as much as the weight required for product molding to the main chamber 130 .

The vacuum member 120 forms a vacuum atmosphere in the load lock chamber 110 and the main chamber 140 and includes a vacuum pump 121 for sucking internal air, a throttle valve 122 for adjusting a vacuum pressure, A third open / close valve 123 opened and closed for adjusting the vacuum atmosphere of the load lock chamber 110, a fourth open / close valve 124 opened and closed for adjusting the vacuum atmosphere of the main chamber 130, A first vacuum gauge 125 indicating the degree of vacuum, a second vacuum gauge 126 indicating the degree of vacuum of the main chamber 130, a first vacuum gauge 126 indicating the degree of vacuum of the vacuum chamber 121 when the molten metal is sucked under the control of the vacuum atmosphere of the main chamber 130 A molten metal trap 127 provided at the front end of the vacuum pump 121 and cooled by a water-cooling method may be provided.

The main chamber 130 is filled with the light metal supplied from the load lock chamber 110 into the plurality of crucibles 140. The charged light metal is heated and melted and the melted light metal melt is spouted, When four crucibles 140 are provided at the charging position, the heating position, the melting position, and the heating / hot sparking position, the light metal supplied from the load lock chamber 110 is supplied to the crucible of the charging position among the plurality of crucibles 140 The charged crucible is rotated through the rotary and tilting member 150 to move to the heating position and heated through the heating member 160 at the heating position .

Further, the crucible is rotated through the rotation and tilting member 150 to the melting position, is further heated through the auxiliary heating member 170 while being heated through the heating member 160 at the melting position, melted into the light metal melt, The crucible is rotated through the rotation and tilting member 150 to the warming / tapping position. When the hot tub is kept warm through the heating member 160 at the warming / tapping position, The crucible can be tilted through the member 150 and taped to the tapping line 20 communicating with the casting mold 10. [

A plurality of crucibles 140 are arranged in a turntable manner and are filled with light metal and then heated through a heating member 160 or an auxiliary heating member 170. The crucible is placed at a position where the light metal is charged, A position where the light metal melt is heated, a position where the light metal melt is heated, a position where the light metal melt is spouted, and the like, Hot water, hot water, hot water, etc.

Needless to say, the charging position, the heating position, and the melting position may be the same, or the heating position and the melting position may be the same, or the heating position and the tap position may be the same. ) May be applied in at least two or more ways as needed.

The rotating and tilting member 150 is coupled with a plurality of crucibles 140 to rotate around a rotation axis and tilts a crucible having a light metal melt to be poured out of a plurality of crucibles 140, The member 150 may include a rotating motor, a rotating shaft, a turntable, or the like, and is variously disclosed in the related art, so a detailed description thereof will be omitted.

The heating member 160 heats a plurality of crucibles 140 and is heated by at least one of a high frequency induction heating method and a resistance heating method. For example, in the case of a high frequency induction heating method, The power is applied (approximately 30-60 KHz or the like), and the light metal charged in the plurality of crucibles 140 is heated using the principle that the conductor generates heat by the eddy current generated by the electromotive force generated by the applied power source can do.

The heating member 160 may be provided by a direct heating method or an indirect heating method. In the case of the direct heating method, the heating member 160 may be provided outside each crucible of the plurality of crucibles 140, A heating member 160 may be provided on the outside of the main chamber 130.

Here, in the direct heating method in which the heating member 160 is provided outside each crucible of the plurality of crucibles 140, both the high frequency induction heating method and the resistance heating method can be used, In the indirect heating method in which the heater 160 is provided, a high frequency induction heating method can be used.

The auxiliary heating member 170 is disposed on the upper part of the plurality of crucibles 140 and is further heated by using any one of laser, electron beam and plasma torch. The auxiliary heating member 170 is heated by the crucible heating using the heating member 160 at the position of the melting crucible The light metal can be melted in a short time by additionally heating the crucible using a high energy source such as a laser, an electron beam, a plasma torch or the like.

It is needless to say that the auxiliary heating member 170 may be provided corresponding to the number of the crucibles 140.

Accordingly, the present invention can improve the casting process efficiency and casting product quality by melting a light metal in a vacuum atmosphere and injecting a high-quality light metal melt into the casting mold without using a heat insulating furnace for holding the light metal melt A vacuum melting apparatus for a casting process and a method thereof.

Next, in the vacuum melting apparatus for a casting process as described above, the load lock chamber is charged with the light metal to be hot water, and the inner state is maintained in a vacuum atmosphere while measuring and supplying the weight by the weight required for product molding, A description will be given of a process in which molten light metal molten metal is successively spouted in the main chamber through the heating member after the charged light metal is sequentially injected into the plurality of crucibles.

FIG. 4 is a flowchart showing a vacuum dissolving method for a casting process according to another embodiment of the present invention. Here, the vacuum melting method for the casting process will be described as a case in which a plurality of crucibles 140 are provided at four charging positions, a heating position, a melting position, and an insulating / tapping position.

Referring to FIG. 4, the light metal to be hot water may be charged into the load lock chamber 110 (step 402). Here, the light metal may include aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and the like.

The lightweight metal may be supplied to the main chamber 130 by a weight necessary for product molding while maintaining the internal state of the load lock chamber 110 in a vacuum atmosphere (step 404). For example, when a light metal is injected into the input end of the load lock chamber 110, the weight required for product molding is measured through the load cell 116 provided at the lower part of the horizontal structure, Closing valve 112 is opened to open the first opening / closing valve 112 and the second opening / closing valve 114 in the space between the first opening / closing valve 112 and the second opening / closing valve 114, It is possible to charge a light metal as much as the weight necessary for product molding.

Thereafter, after the first opening / closing valve 112 is closed, the internal state of the space therebetween is adjusted to a vacuum atmosphere through the vacuum member 120, and the second opening / closing valve 114 is opened to change the weight Of light metal can be supplied to the main chamber 130.

Next, the light metal supplied from the load lock chamber 110 can be charged into the plurality of crucibles 140 provided in the main chamber 130 (step 406). For example, the main chamber 130 is charged with the light metal supplied from the load lock chamber 110 into the crucible at the charging position among the plurality of crucibles 140 while being controlled in a vacuum atmosphere through the vacuum member 120 ).

Then, the plurality of crucibles 140 can be heated through the heating member to melt the light metal (step 408). For example, after the crucible in the charging position is rotated through the rotary and tilting member 150 and moved to the heating position, it can be heated through the heating member 160 in the heating position, At least one of a high frequency induction heating method and a resistance heating method may be used.

In the direct heating method in which the heating member 160 is provided outside each crucible of the plurality of crucibles 140, the high-frequency induction heating method and the high-frequency induction heating method may be used. A resistance heating method can be used. In the indirect heating method in which the heating member 160 is provided outside the main chamber 130, a high frequency induction heating method can be used.

The crucible in the heating position is rotated to the melting position through the rotation and tilting member 150 and is further heated through the auxiliary heating member 170 while being heated through the heating member 160 at the melting position, ≪ / RTI >

The auxiliary heating member 170 may be further heated by using any one of a laser, an electron beam, and a plasma torch.

Next, the plurality of crucibles 140 may be rotated through the rotation and tilting member 150 to tap the light metal melt (step 410). For example, the crucible in the melted position is rotated through the rotation and tilting member 150 to the warm / hot water position, is kept warm through the heating member 160 at the warm / hot water position, The crucible is tilted through the rotating and tilting member 150 and can be taped to the tapping line 20 communicating with the casting mold 10. [

Accordingly, in the present invention, after the lightweight metal to be hot water is charged into the load lock chamber, the weight of the lightweight metal is supplied to the plurality of crucibles And the molten light metal molten metal is melted through the heating member in succession in the main chamber, so that it is possible to prevent the inclusion of the atmospheric gas and prevent the mixing of moisture, gas and the like through continuous casting in a vacuum atmosphere, Quality can be improved, and high-quality cast products can be produced.

Further, the present invention is characterized in that a plurality of crucibles are arranged and rotated in the order of charging, heating, melting, keeping warm, and spouting, and the molten light metal molten metal is spouted in the main chamber so that the charging, heating, melting, The sequential light metal molten metal can be spouted in sequence, and continuous casting can be performed in a short time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be readily apparent that such substitutions, modifications, and alterations are possible.

110: load lock chamber 120: vacuum member
130: main chamber 140: plural crucibles
150: rotation and tilting member 160: heating member
170: auxiliary heating member

Claims (12)

A load lock chamber for supplying the light metal at a weight required for product molding while maintaining the internal state in a vacuum atmosphere after the light metal to be hot water is charged;
A main chamber in which the light metal supplied from the load lock chamber is charged into a plurality of crucibles, the charged light metal is heated and melted and the melted light metal melt is spouted,
A vacuum member for forming the inside of the load lock chamber and the main chamber in a vacuum atmosphere,
A heating member for heating the plurality of crucibles;
And a vacuum melting apparatus for a casting process.
The method according to claim 1,
Wherein the plurality of crucibles are arranged in a turntable manner.
3. The method of claim 2,
Wherein the plurality of crucibles are combined with the rotating and tilting members and rotated in the order of charging, heating, melting, keeping warming, and tapping with reference to the rotating shaft of the rotating member.
The method of claim 3,
Wherein the rotating and tilting member tilts a crucible having the light metal melt to be poured out of the plurality of crucibles to discharge the molten metal.
The method according to claim 1,
Wherein the heating member is heated by at least one of a high frequency induction heating method and a resistance heating method.
6. The method of claim 5,
In the vacuum melting apparatus for casting process,
An auxiliary heating member disposed above the plurality of crucibles for further heating by using any one selected from laser, electron beam, and plasma torch;
Wherein the vacuum melting apparatus further comprises:
Loading the light metal to be hot water into the load lock chamber,
Supplying the light metal to the main chamber by a weight necessary for product molding while maintaining the inside of the load lock chamber in a vacuum atmosphere,
Loading the light metal supplied from the load lock chamber into a plurality of crucibles provided in the main chamber;
Melting the light metal by heating through a heating member,
Rotating the plurality of crucibles through a rotating and tilting member to tap the light metal molten metal
≪ / RTI >
8. The method of claim 7,
Wherein the plurality of crucibles are arranged in a turntable manner.
9. The method of claim 8,
Wherein the plurality of crucibles are rotated in the order of charging, heating, melting, keeping warm, and spouting with respect to the rotating shaft of the rotating and tilting member.
10. The method of claim 9,
Wherein the step of tapping the light metal melt includes tilting the crucible having the light metal melt to be taped out of the plurality of crucibles through the rotating and tilting member to cause tapping.
8. The method of claim 7,
Wherein the step of melting the light metal is performed through the heating member including at least one of a high frequency induction heating method and a resistance heating method.
12. The method of claim 11,
Wherein the step of melting the light metal is further provided by heating through an auxiliary heating member disposed on top of the plurality of crucibles and including any one selected from a laser, an electron beam, and a plasma torch.

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