KR20090081836A - Continuous manufacturing apparatus of foam metal and its manufacturing method - Google Patents

Abstract

The continuous production apparatus of the foamed metal of the present invention comprises a melting furnace in which a metal is dissolved and a thickener is added to produce a molten metal; A conveying part provided at one side of the melting furnace and having a water flow formed therein to guide the molten metal discharged from the melting furnace to the foam molding part for foam molding; A foaming agent injecting unit provided on the molten metal and injecting a foaming agent into the molten metal that is transferred through the molten metal; It is provided on one side of the conveying unit includes the foam molding unit for foaming the molten metal conveyed through the water flow.

In the present invention, during the manufacture of the foamed metal, a plurality of foams are introduced into the molten metal to be melted while molten metal, which has dissolved the metal to be foamed, is transferred to the foam molding part through a water bath, and thus the blowing agent is dispersed in the molten metal. Since it is to be foamed, it is easy to add a blowing agent, the structure is simple, there is an advantage that the blowing agent is evenly dispersed in the molten metal and foamed. In addition, the foaming agent is evenly dispersed and foamed in the molten metal, there is an advantage that can be produced in a high-quality foam metal having a uniform form and size of pores.

Description

Continuous manufacturing apparatus of foamed metal and its manufacturing method {CONTINUOUS MANUFACTURING APPARATUS OF FOAM METAL AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to an apparatus for producing a foamed metal and a method for manufacturing the same, and more particularly, to a continuous production apparatus for a foamed metal capable of continuously producing a foamed metal by mixing a blowing agent in the molten metal and a method for manufacturing the same.

Generally, foamed metal is a metal in which numerous pores are formed. Since the foamed metal has many pores therein, the specific gravity is considerably light, and the pores are excellent in sound absorption, sound insulation and shock absorption.

Therefore, the foamed metal is used as a noise-proof building interior material and soundproofing material that requires sound absorption and soundproofing, and is usefully used in automobiles, ships, aircrafts, etc. due to shock absorption and light weight.

Representative examples of the foamed metals are expanded aluminum. Foamed aluminum has a porosity of 90% or more and a specific gravity of 0.2 to 1.0. In addition, it is stiff, has excellent heat resistance and workability, and has been spotlighted as a promising foam metal.

The production of the foamed metal is performed by supplying a gas and a blowing agent to the molten metal heated by melting the metal so that the bubbles are distributed, and cooling the molten metal while the bubbles are distributed.

As a device for manufacturing such a foamed metal, there is a continuous foamed metal manufacturing method and apparatus disclosed in Korean Patent Publication No. 0592533.

According to the prior art, a thickening furnace in which a thickener is mixed and stored in the molten metal, a stirrer installed at the upper part of the thickening furnace to agitate the molten metal and the thickener stored in the thickening furnace, and foamed to receive and foam the molten metal from the thickening furnace. Furnace, gas pipe for supplying gas through the membrane inside the foaming furnace, an electronic stirrer for dispersing / micronizing the gas supplied into the foaming furnace, and rollers for drawing and transporting molten metal discharged through the outlet of the foaming furnace And cooling means for cooling the molten metal drawn by the roller.

In addition, another conventional technology is a method and apparatus for manufacturing low pressure continuous foam metal disclosed in Korean Laid-Open Patent Publication No. 2002-0034327.

This is a thickening furnace mentioned in the prior art, agitator installed in the thickening furnace, foaming furnace, the gas pipe for supplying gas through the membrane inside the foaming furnace, the roller and the cooling means is provided, and the foaming furnace is introduced through the membrane A gas stirrer is further provided in the foaming furnace to uniformly disperse the gas.

However, in the related arts, since the pressure of the gas injected through the membrane must be higher than the pressure of the molten metal acting on the membrane, and it must be possible to form pores of a certain shape or size in the molten metal, the injection pressure control of the gas is substantially limited. It was quite tricky. In addition, there was a difficulty in that the gas pressure should be applied evenly to the front surface of the membrane.

 Thus, the gas is supplied to the molten metal at a predetermined pressure or more, and the gas supplied by the gas stirrer and the electronic stirrer is uniformly dispersed in the molten metal while the gas is supplied.

However, such stirring alone has a limit in uniformly dispersing the gas in the molten metal. In addition, there is a problem that the structure and manufacturing method of the manufacturing apparatus is complicated by the increase in the configuration of a separate gas stirrer and an electronic stirrer.

On the other hand, the blowing agent that is piggybacked on the gas to be supplied into the molten metal was not smoothly discharged through the fine pores of the membrane. And even if the blowing agent is supplied in the molten metal, there is a limit to uniform distribution in the molten metal only by the above stirring.

The present invention is to solve the problems of the prior art, an object of the present invention is to provide a continuous manufacturing apparatus and a method for producing a foamed metal capable of continuously producing a foamed metal with pores uniformly dispersed in a uniform shape and size. It's there.

Continuous production apparatus of the foamed metal of the present invention for achieving the above object and the melting furnace for dissolving the metal for foaming; A foam molding part which receives the molten metal dissolved by the melting furnace and foams the molded metal; A conveying part in which a molten metal is conveyed therein so as to supply molten metal of the melting furnace to the foam molding part; And a foaming agent injecting unit provided to the conveying unit and injecting a foaming agent into the molten metal that is conveyed through the water run.

The blowing agent input part is formed into a first metal rod of the metal material dissolved in the molten metal through the foam inlet hole formed in a plurality of the transfer portion and dissolved in the molten metal, and a foaming agent coating layer coated with the blowing agent on the outer surface of the first metal rod. A plurality of first foams.

In addition, the blowing agent injection portion is introduced into the water flow through the foam inlet hole formed in the conveying portion and the second metal rod of the metal material dissolved in the molten metal and the hollow portion formed in the longitudinal direction inside the second metal rod It includes a plurality of second foam filled with the blowing agent.

On the other hand, the blowing agent inlet is a housing through which the inside is penetrated, and the water inlet; A foaming agent storage hopper for storing the foaming agent to be supplied to the penetrated interior of the housing; The screw member is rotatably installed in the penetrating interior of the housing and has a spiral groove formed on the outer surface to transfer the foaming agent supplied from the foaming agent storage hopper and to inject the molten metal into the molten metal which is conveyed through the ballway during rotation. do.

Foamed metal continuous production method of the present invention comprises the melting step of dissolving the metal for foaming by the melting furnace; Adding a thickener to the molten metal dissolved in the melting furnace so that the molten metal has viscosity; A molten metal transfer step of transferring the molten metal having the viscosity to a foam molding part through a water run; And a foaming agent input step of continuously foaming the foaming agent into the molten metal transferred through the water bath.

The foaming agent input step further includes a foam supplying step of supplying the first foamed body in which the foaming agent coating layer is formed by coating the foaming agent on the outer surface of the first metal rod made of the metal material into the ballway.

In the present invention, during the manufacture of the foamed metal, a plurality of foams are introduced into the molten metal to be melted while molten metal, which has dissolved the metal to be foamed, is transferred to the foam molding part through a water bath, and thus the blowing agent is dispersed in the molten metal. Since it is to be foamed, it is easy to add a blowing agent, the structure is simple, there is an advantage that the blowing agent is evenly dispersed in the molten metal and foamed.

In addition, the foaming agent is evenly dispersed and foamed in the molten metal, there is an advantage that can be produced in a high-quality foam metal having a uniform form and size of pores.

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

An embodiment of the foamed metal continuous production apparatus of the present invention is shown in FIG.

Referring to FIG. 1, an embodiment of the present invention includes a melting furnace 10 in which a thickener is added and dissolved together with a metal to be foamed, and guided to the foam molding unit for foaming molten metal dissolved in the melting furnace 10. Rolling part 20 in which the waterway 21 is formed, the blowing agent input part 30 which injects the blowing agent 50 into the molten metal conveyed through the waterway 21, and the molten metal in which the blowing agent 50 was injected is rolled. It consists of a foam molding portion 40 to be molded into a predetermined shape.

The melting furnace 10 is for dissolving a metal to be foamed, that is, aluminum, magnesium, aluminum alloy, magnesium alloy, etc., an electric furnace may be used.

The melting furnace 10 is provided with stirring means for mixing the molten metal and the added thickener. Stirring means 11 is composed of a stirring blade (11a) located inside the melting furnace 10, and a drive motor (11b) for rotating the stirring blade.

Thickeners include calcium and calcium-aluminum.

The transfer part 20 has a water supply 21 formed therein, and the main body 22 installed on one side of the melting furnace 10 so that the water supply 21 communicates with the water supply hole 12 of the melting furnace 10, It consists of the heat-transfer heater 23 installed in the main body 22 corresponding to the periphery of 21, and heating the water supply 21 inside.

The heat transfer heater 23 heats the molten metal transferred through the water supply 21 to facilitate the transfer.

The blowing agent input unit 30 is for pouring the blowing agent 50 into the molten metal transferred through the water supply 21 to foam.

2, the foaming agent inlet 30 is a foam that is dissolved in the molten metal penetrates through the body 22 into the waterway 21 and is transferred to the waterway 21, and the foam It consists of a supply means for supplying into the water supply 21.

Referring to FIG. 3, the foam is formed of a first metal rod 31a having the same material as that of the molten metal and a foaming agent 50 spray-coated on an outer surface of the first metal rod 31a to form a foam coating layer 31b. One foam 31 is used.

In addition, referring to the accompanying FIG. 4 as a foam, a second metal rod 32a having the same material as that of the molten metal and a plurality of hollow portions 32b are formed in the longitudinal direction inside the second metal rod 32a. , The second foam 32 filled with the blowing agent 50 in the hollow portion 32b may be used.

On the other hand, referring to the accompanying FIG. 5, a plurality of foams are provided to form rows at regular intervals throughout the width of the water supply 21. In addition, a plurality of rows are provided at regular intervals along the longitudinal direction of the water supply 21. At this time, it is preferable that the foams which form mutually adjacent rows are provided so as to be located between the foams in the row direction of the waterway.

This is for the molten metal conveyed along the waterway 21 to zigzag a plurality of rows of foams so that the entire molten metal is in uniform contact with the foam. Therefore, the foam is dissolved evenly throughout the molten metal so that the blowing agent 50 is uniformly dispersed.

As the blowing agent 50, mercury, metal hydride, or the like may be used.

Referring to FIG. 1, the supply means 33 is a means for introducing the first and second foams 31 and 32 into the tap.

That is, the supply means pressurizes the bobbin 33a in which the first and second foams 31 and 32 are held, and the first and second foams 31 and 32 wound in the bobbin 33a to press the inside of the water supply 21. A pair of feed rollers 33b may be provided to be in close contact with each other to supply the to the feeder. The main body 22 is formed with a foam inlet hole 33c through which the first and second foams 31 and 32 penetrate so that the first and second foams 31 and 32 enter the waterway 21.

The foam molding unit 40 uses a rolling machine provided with a plurality of rolling rollers 41 into which the blowing agent 50 is introduced to roll the molten metal transferred through the water supply 21 to form a predetermined shape.

And, when the molten metal is rolled by the rolling roller 41, an electric heat heater 23 for heating the molten metal is provided between the rolling rollers 41. This is to prevent the molten metal rolled by the rolling roller 41 from being cooled rapidly so that the molding by the rolling roller 41 can be performed smoothly.

Hereinafter, the operation and effects of the embodiment of the present invention configured as described above will be described.

The molten metal is prepared by dissolving the metal to be foamed in the melting furnace 10. Then, thickeners are added to the molten metal to increase the viscosity of the molten metal.

As such, the molten metal in the melting furnace 10 is transferred to the foam molding part 40 through the tap water 21. The first and second foams 31 and 32 are introduced into the tap water 21, and the first and second foams 31 and 32 are dissolved in the molten metal to be transferred. At this time, the blowing agent 50 included in the first and second foams 31 and 32 is dispersed in the molten metal and foamed.

On the other hand, a large number of first and second foams 31 and 32 are formed in the water supply 21 to form heat, and the first and second foams 31 and 32 are uniformly contacted with the entire molten metal to dissolve. As a result, the blowing agent is uniformly dispersed in the molten metal.

Therefore, in the process of dissolving the first and second metal rods 31a and 32a of the first and second foams 31 and 32 in the molten metal to be transported, the blowing agent 50 is naturally dispersed in the molten metal.

Thus, in the present invention, the blowing agent is forcibly supplied to the molten metal and then the molten metal is stirred to disperse the blowing agent as in the prior art, and the blowing agent is simple in structure and the blowing agent is more uniformly dispersed in the molten metal. . In addition, the shape and size of the pores formed by the foaming of the blowing agent is also uniform.

When the first and second foams 31 and 32 introduced into the tap water 21 are dissolved, the first and second foams 31 and 32 are drawn into the tap water 21 by the supply means 33. Therefore, the blowing agent 50 can be added to the molten metal continuously transferred. Retraction of the first and second foams 31 and 32 is automatically made at a set time period.

As a result, while the molten metal is transferred from the melting furnace 10 through the runway 21, the foamed metal can be continuously produced.

On the other hand, it is shown in Figure 6 attached to another embodiment of the foaming agent input of the foaming metal continuous production apparatus according to the present invention.

Referring to FIG. 6, the foaming agent injecting unit 30 penetrates the inside thereof, and a foaming agent storage hopper for storing the housing 34 which is introduced into the ballway and the foaming agent 50 to be supplied to the penetrated interior of the housing 34. (35) and a screw member (36) rotatably installed in the penetrating interior of the housing (34) for transporting the blowing agent (50) supplied into the housing (34) and feeding it into the waterway (21); It consists of a rotating means 37 for rotating the screw member (36).

It is preferable that a plurality of housings 34 are provided to form a plurality of rows similarly to the first and second foams 31 and 32. In addition, it is preferable that the housing 34 is installed so that the tip of the housing 34 through which the blowing agent 50 is discharged is located above the central portion of the tap 21 in a predetermined depth.

The blowing agent storage hopper 35 is located above the housing 34 such that the blowing agent 50 is supplied into the housing 34 by its own weight.

As the rotating means 37, a motor or the like for generating a normal rotational force is used.

The foaming agent inlet unit 30 configured as described above is transported with the foaming agent 50 supplied to the housing 34 by the rotation of the screw member 36 and introduced into the tap water 21. In addition, since many housings 34 are provided in the water supply 21 by forming heat, the blowing agent 50 is uniformly dispersed and foamed in the entire molten metal flowing in the water supply 21.

In addition, since the discharge of the blowing agent 50 is made by the rotation of the screw member 36, it is possible to control the rotation of the screw member 36 to easily control the discharge of the blowing agent 50.

On the other hand, it is shown in Figure 7 attached to the continuous manufacturing method of foamed metal according to the present invention.

Referring to FIG. 7, in the continuous manufacturing method of the foamed metal of the present invention, the blowing agent is naturally dissolved in the molten metal and uniformly dispersed and foamed while the thickener is added and the molten metal having a set viscosity is transferred along the water flow. It is.

That is, the continuous production method of the foamed metal includes a dissolution step of dissolving the metal for foaming in the melting furnace, a thickener input step of injecting a thickener into the molten metal dissolved in the melting furnace, and a molten metal into which the thickener is injected into the foam molding unit. It is composed of a molten metal transfer step to transfer through, a foaming agent input step of continuously adding a blowing agent to the molten metal transferred through the water flow, and a foam molding step of foaming the molten metal into which the blowing agent is injected.

The dissolving step is a step of dissolving aluminum, copper, aluminum alloy, copper alloy, and the like, which are metals for foaming in the melting furnace 10.

The thickener input step is to increase the viscosity of the molten metal by adding a thickener to the molten metal dissolved in the melting furnace (10). That is, after the thickener is added, the molten metal and the thickener are mixed by the stirring means 11.

The molten metal transfer step is a step in which the molten metal dissolved in the melting furnace 10 is transferred to the foam molding unit 40 through the water supply 21. The water flow passage 21 is formed to be inclined in the main body 22 so that molten metal flows to the foam molding portion 40 by its own weight. In addition, in order to prevent the molten metal from being cooled and hardened while flowing through the waterway 21, the inside of the waterway 21 is heated by the electrothermal heater 23 provided around the waterway 21.

When the molten metal is aluminum, the temperature of the molten metal is maintained at 600 ° C to 750 ° C.

The blowing agent input step is a step of allowing the blowing agent 50 to be injected into the molten metal transferred through the runway 21 to foam. As a method of injecting the blowing agent 50 into the molten metal transferred through the waterway 21, the foams for introducing the plurality of first and second foams 31 and 32 containing the blowing agent into the waterway 21. By the supply stage.

The foam supplying step is a step of introducing the first and second foams 31 and 32 wound on the bobbin 33a into the water supply 21 at regular intervals by the transfer roller 33b.

As such, when the plurality of first and second foams 31 and 32 are introduced into the water supply 21 by the foam supply means 33, the plurality of first and second foams 31 and 32 are transferred to the molten metal to be conveyed. As it is dissolved, the blowing agent 50 included in the first and second foams 31 and 32 is uniformly dispersed in the molten metal and foamed.

Therefore, as compared to the forced supply of the blowing agent to the molten metal and stirring the molten metal in order to disperse the blowing agent evenly in the molten metal as in the prior art, the addition of the blowing agent is simple, so that the blowing agent is evenly dispersed in the molten metal do.

In addition, in another embodiment, the blowing agent 50 may be supplied from the blowing agent storage hopper 35 in which the blowing agent 50 is stored and introduced into the water supply 21 by the rotation of the screw member 36.

The foam molding step is a step in which a molten metal foamed with a blowing agent is rolled by a rolling roller 41 to form a predetermined shape.

An embodiment of the present invention described above should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

1 is a view schematically showing an embodiment of a foamed metal continuous manufacturing apparatus according to the present invention,

FIG. 2 is a view illustrating an example in which a foam drawn into a water supply to a transfer part according to the embodiment of FIG. 1 is dissolved in a molten metal; FIG.

3 is a view showing the structure of a first foam according to the embodiment of FIG.

4 is a view showing the structure of a second foam according to the embodiment of FIG.

5 is a view showing an example in which the foam according to the embodiment of FIG.

6 is a view showing another embodiment of the blowing agent input unit according to the embodiment of FIG.

Figure 7 is a block diagram showing the manufacturing process of the foamed metal continuous manufacturing method according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: melting furnace 20: conveying part

21: Tongdo 23: electric heater

30: blowing agent input 31: the first foam

32: second foam 33, supply means

34 housing 35 blowing agent storage hopper

36: screw member 40: foam molding

41: rolling roller 50: blowing agent

Claims (6)

A melting furnace for dissolving a metal for foaming; A foam molding part which receives the molten metal dissolved by the melting furnace and foams the molded metal; A conveying part in which a molten metal is conveyed therein so as to supply molten metal of the melting furnace to the foam molding part; And a foaming agent injecting unit provided in the conveying unit and injecting a foaming agent into the molten metal that is conveyed through the water run. The method of claim 1, The blowing agent inlet A plurality of agents having a first metal rod made of the metal material dissolved in the molten metal and introduced into the molten metal through a foam inlet hole formed in the transfer part and a foaming agent coating layer coated with the foaming agent on an outer surface of the first metal rod; Foamed metal continuous production apparatus comprising a foam. The method of claim 1, The blowing agent input portion A plurality of second metal rods of the metal material dissolved in the molten metal and introduced into the molten metal through the foam inlet holes formed in the transfer part, and a plurality of the blowing agents filled in the hollows formed in the longitudinal direction of the second metal rods; Foamed metal continuous production apparatus comprising a second foam of the. The method of claim 1, The blowing agent inlet A housing through which the inside penetrates and is drawn into the ballway; A foaming agent storage hopper for storing the foaming agent to be supplied to the penetrated interior of the housing; The screw member is rotatably installed in the penetrating interior of the housing and has a spiral groove formed on the outer surface to transfer the foaming agent supplied from the foaming agent storage hopper and to inject the molten metal into the molten metal which is conveyed through the ballway during rotation. Foamed metal continuous manufacturing apparatus, characterized in that. A dissolving step of dissolving the metal for foaming by the melting furnace; Adding a thickener to the molten metal dissolved in the melting furnace so that the molten metal has viscosity; A molten metal transfer step of transferring the molten metal having the viscosity to a foam molding part through a water run; And a foaming agent input step of continuously foaming the foaming agent into the molten metal conveyed through the water bath. The method of claim 5, The blowing agent input step Foaming metal continuous manufacturing method characterized in that the foaming step is further provided on the outer surface of the first metal rod made of a material of the metal to supply the first foamed body having a foaming agent coating layer formed into the water run.

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