KR102392155B1 - Electric contact billet manufacturing device including Electric heating furnace for electrical contact, Electric contact billet manufacturing device including carbon mold crucible And Carbon mold crucible detachment and movement device - Google Patents

Abstract

An embodiment relates to an electric contact billet manufacturing device. Specifically, an embodiment relates to an electric contact billet manufacturing device including an electric heating furnace for electrical contact molten metal, an electric contact billet manufacturing device including a carbon mold crucible and a carbon mold crucible detachment and movement device. An electric contact billet manufacturing device according to an embodiment comprises: a molten metal crucible for melting molten metal for an electrical contact; an electric heating furnace for electrical contact molten metal which accommodates and stabilizes the molten metal for the electrical contact melted in the molten metal crucible; and a carbon mold crucible for an electrical contact disposed on a lower side of the electric heating furnace for the electrical contact molten metal and forming a molten metal space therein such that the stabilized molten metal for the electrical contact is poured. According to the present invention, cadmium oxide (CdO) acting as an impurity is not inherent in a billet.

Description

An electric contact billet manufacturing device including an electric heating furnace for electrical contacts, an electrical contact billet manufacturing device including a carbon mold crucible, and a carbon mold crucible detachment and movement device TECHNICAL FIELD Electric contact billet manufacturing device including carbon mold crucible And Carbon mold crucible detachment and movement device}

The embodiment relates to a billet manufacturing apparatus for electrical contacts. Specifically, the embodiment relates to a device for manufacturing a billet for electrical contact including an electric heating furnace for electrical contact, a device for manufacturing a billet for electrical contact including a carbon mold crucible, and a device for detaching and moving a carbon mold crucible.

Electrical contact material is an electrical contact element that mechanically opens or closes or contacts an electric circuit, and is widely used in various industries such as electricity, electronics, communication, automobiles, elevators, such as switches, relays, and electromagnetic switches.

The required performance of the electrical contact should be low contact resistance, high electrical conductivity, thermal conductivity, and stability, excellent wear resistance, and low deformation of the contact surface.

Although the performance of such an electrical contact is expressed by the constituent materials of the electrical contact, it is very important to determine the performance of the electrical contact to minimize contaminants that may be generated during the manufacturing process of the electrical contact.

On the other hand, electrical contact materials are used in electrical products with various materials depending on the usage environment, and are manufactured by a melting method and a powder metallurgy method according to the manufacturing method.

For example, the electrical contacts manufactured by the melting method are Ag-CdO type and Ag-SnO ₂ type, and the electrical contacts manufactured by the powder metallurgy method are Cu-W type, Ag-W type, Ag-WC type, Ag -C-based, Ag-Ni-based, and the like.

Among them, AgCdO-based contact materials are widely used as electrical circuit breakers, energized contacts of multi-stage circuit breakers, overload relays, magnetic contactors, etc. due to their high current capacity, excellent arc resistance, and low contact resistance.

On the other hand, according to the applicant's internal technology, processes such as dissolution, billet casting, heat treatment, extrusion, wire drawing, cutting, and oxidation are in progress as the manufacturing process of AgCdO-based contact material. The intermediate process was repeated.

Specifically, in the AgCdO-based melting process, alloy elements such as silver (Ag) and cadmium (Cd) are put into the 'melting crucible' in an appropriate ratio, then melted and stirred through high frequency induction, and then directly injected into the 'casting crucible made of iron' Thus, a billet was cast.

On the other hand, Figures 1a to 1c are photographs of problems that occur when manufacturing the billet for electrical contact in the internal technology.

However, cadmium (Cd) has a property of being easily converted to cadmium oxide (CdO) because it reacts sensitively with air, and its density is lower than that of AgCd molten metal, so it is located above the molten metal or stirred by high frequency to exist in the AgCd molten metal. do.

Referring to FIG. 1C , cadmium oxide (CdO) inherent in the billet is present in the wire W in the wire drawing process and acts as a defect (D), and even the wire is broken. there was a problem with

On the other hand, when molten metal is directly injected into the 'iron casting crucible' after melting in an induction furnace according to internal technology, the cast iron casting crucible has low heat dissipation characteristics, so as shown in FIGS. 1A and 1B, surface defects and oxide scale on the billet Defects have caused technical problems that adversely affect the mechanical and electrical properties of electrical contacts due to cracks, foreign substances, cracks, or sliding when cut.

In addition, when the cast iron casting crucible is used several times, the surface becomes rough and adversely affects the surface modification of the billet. There was a problem that adversely affected the

In addition, the cast iron crucible is made of iron and has a significant weight, so there is a problem in mobility and workability.

One of the technical problems of the embodiment is to provide an apparatus for manufacturing a billet for electrical contacts that prevents cadmium oxide (CdO) acting as an impurity from being inherent in the billet.

In addition, one of the technical problems of the embodiment is to provide an apparatus for manufacturing a billet for electrical contact that can prevent the occurrence of surface defects or oxide scale defects of the billet.

In addition, one of the technical problems of the embodiment is to provide an apparatus for manufacturing a billet for electrical contact that can solve the problem that the mold crucible adversely affects the surface modification of the billet.

In addition, one of the technical problems of the embodiment is to provide a device for detaching and moving a carbon mold crucible for electrical contact with excellent mobility and workability.

The technical problems of the embodiments are not limited to those described in this item, and include those that can be grasped throughout the specification.

An electrical contact billet manufacturing apparatus according to an embodiment includes a molten metal crucible for melting molten metal for electrical contact, an electric heating furnace for molten electrical contact that receives and stabilizes the molten metal for electrical contact melted in the molten metal crucible, and the molten electrical contact It may include a carbon mold crucible for electrical contact disposed at the lower side of the electric heating furnace, and into which the stabilized molten metal for electrical contact is poured by forming a molten metal space therein.

The electrical heating furnace for molten electrical contact is disposed in contact with the lower side of the molten metal crucible, and the electrical heating furnace for electrical contact molten metal transfers the molten metal melted in the molten metal crucible to the electrical contact point through the molten metal nozzle provided below the molten metal crucible. It can be injected as an electric thermal insulation for molten metal.

The carbon mold crucible for electrical contact is in close contact with the first carbon mold crucible and the first carbon mold crucible disposed below the electric heating furnace for molten metal for electrical contact to form a molten metal space therein, and the stabilized molten metal for electrical contact This can be accepted.

In addition, the apparatus for manufacturing a billet for electrical contact according to an embodiment includes a first carbon mold crucible and a second carbon mold crucible in close contact with the first carbon mold crucible to form a molten metal space therein; a carbon mold crucible for electrical contacts; A device for detaching and moving a carbon mold crucible including an outer fixing part surrounding the outer periphery of the carbon mold crucible for electrical contact, a support part extending from one side of the outer fixing part, and a fastening part for fastening the support part.

The outer fixing part of the device for detaching and moving the carbon mold crucible may include a first outer fixing part for fixing one outside of the carbon mold crucible, and a second outside fixing part for fixing the other outside of the carbon mold crucible. .

The outer fixing part of the device for detaching and moving the carbon mold crucible may include a connection part for fastening the first outer fixing part and the second outer fixing part to be movable with each other.

The support portion of the device for detaching and moving the carbon mold crucible includes a first support portion extending in a first direction from one side of the first outer fixing portion, and a second support portion extending in the first direction from one side of the second outer fixing portion. It may include a support.

The first support part may include a predetermined first recess, and the second support part may include a second recess at a position corresponding to the first recess.

The fastening part may include a first fastening part fastened to the first recess and the second recess and a second fastening part coupled to the first fastening part.

The fastening part may include a third fastening part for reinforcing the second fastening part.

The third fastening part may include support bars extending to both sides of the second fastening part.

In addition, the device for manufacturing a billet for electrical contact according to the embodiment is disposed below an electric heating furnace for molten electrical contact that receives and stabilizes molten metal for electrical contact melted in a predetermined molten metal crucible, and the electric heating furnace for molten electrical contact, The first carbon mold crucible and the first carbon mold crucible are in close contact with each other to form a molten metal space therein, the stabilized molten metal for electrical contacts is poured, and the carbon mold crucible for electrical contacts and the outside of the carbon mold crucible for electrical contacts It may include an outer fixing portion surrounding the outer fixing portion, a support portion extending from one side of the outer fixing portion, and a fastening portion for fastening the support portion.

The outer fixing part of the device for detaching and moving the carbon mold crucible includes: a first outer fixing part for fixing one outside of the carbon mold crucible, and a second outside fixing part for fixing the other outside of the carbon mold crucible; and a connection part for fastening the first outer fixing part and the second outer fixing part and allowing mutual movement.

A support portion of the device for detaching and moving the carbon mold crucible includes a first support portion extending in a first direction from one side of the first outer fixing portion, and a second support portion extending in the first direction from one side of the second outer fixing portion. may include.

The first support part may include a predetermined first recess, and the second support part may include a second recess at a position corresponding to the first recess.

The fastening part may include a first fastening part fastened to the first recess and the second recess and a second fastening part coupled to the first fastening part.

According to the embodiment, there is a technical effect that can provide an apparatus for manufacturing a billet for electrical contacts that prevents cadmium oxide (CdO) acting as an impurity from being inherent in the billet.

For example, according to the electric contact billet manufacturing apparatus according to the embodiment, cadmium oxide (CdO), which acts as an impurity, acts as an impurity There is a technical effect that can provide a high-quality electric contact billet by not being embedded in the billet.

In addition, according to the embodiment, there is a technical effect that can provide a billet manufacturing apparatus for electrical contacts that can prevent the occurrence of surface defects or oxide scale defects of the billet.

For example, the carbon mold crucible 210 according to the embodiment has pores, so it has a high temperature transfer power and improved heat conduction, so that uniform cooling on the inside and outside of the billet may be possible. Accordingly, according to the embodiment, the difference in the cooling rate between the outside and the inside of the billet is not large and uniform cooling is possible, so there is a technical effect that surface defects such as shells or oxide scale defects do not occur on the surface of the billet.

In addition, according to the embodiment, there is a technical effect that can provide a billet manufacturing apparatus for electrical contact that can solve the problem that the mold crucible adversely affects the surface modification of the billet.

For example, when the carbon mold crucible 210 of the embodiment is employed, there is a technical effect of remarkably improving the surface quality in the extrusion and wire drawing processes by improving the surface modification of the billet due to the lubricity of carbon.

In addition, according to the embodiment, there is a technical effect that can provide a device for removing and moving the carbon mold crucible for electrical contact excellent in mobility and workability.

For example, the carbon mold crucible 210 according to the embodiment is designed as a split mold, and the detachment and movement device 220 of the carbon mold crucible according to the embodiment includes the first outer fixing part 221a and the second outer fixing part. Since the outer fixing part 220 can be opened and closed by including the connecting part 225 to fasten the 221b and to be mutually movable, the final solidified billet can be separated from the carbon mold crucible 210 without damage, so that the outside of the billet It has a special technical effect that the surface quality is improved and there is no physical damage to the carbon mold.

The technical effects of the embodiments are not limited to those described in this item, and include those that can be understood throughout the specification.

1a to 1c are photographs of problems that occur during the manufacture of billets for electrical contacts in the internal technology.
2A to 2C are cross-sectional views of an apparatus 1000 for manufacturing a billet for electrical contact according to an embodiment.
Figure 3 is a combined perspective view of a carbon mold crucible 210 for electrical contact according to the embodiment and the detachable and moving device 220 of the carbon mold crucible.
Figure 4a is a detailed combined perspective view of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to the embodiment shown in Figure 3;
Figure 4b is an exploded perspective view of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to the embodiment shown in Figure 4a.
5A is a combined perspective view of a carbon mold crucible 210 for electrical contact and a device for detaching and moving the carbon mold crucible 220 according to an additional embodiment.
Figure 5b is an exploded perspective view of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to the embodiment shown in Figure 5a.
Figure 5c is a separate photograph of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to the embodiment shown in Figure 5a.

Hereinafter, the invention according to an embodiment for solving the above problems will be described in more detail with reference to the drawings.

The suffixes “module” and “part” for the components used in the following description are given simply in consideration of the ease of writing the present specification, and do not impart a particularly important meaning or role by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises", "have", or "includes" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one It should be understood that it does not preclude the possibility of the presence or addition of or more other features or numbers, steps, operations, components, parts, or combinations thereof.

(Example)

2A to 2C are cross-sectional views of an apparatus 1000 for manufacturing a billet for electrical contact according to an embodiment.

First, according to the applicant's internal technology, processes such as melting, billet casting, heat treatment, extrusion, wire drawing, cutting, and oxidation are in progress as the manufacturing process of AgCdO-based contact material, and after cutting, oxidized The AgCdO material is pressed again to the density level of the billet, and thereafter, electrical contact products are manufactured through heat treatment, extrusion, wire drawing, and cutting.

On the other hand, as described above, in the internal technology, alloy elements such as silver (Ag) and cadmium (Cd) are put into the melting crucible in the AgCdO-based melting process, and then melted and stirred through high-frequency induction, and then directly into the iron casting crucible. It was poured to cast a billet.

Specifically, in the AgCdO-based melting process, alloy elements such as silver (Ag) and cadmium (Cd) are put into the 'melting crucible' in an appropriate ratio, then melted and stirred through high-frequency induction, and then directly injected into the 'casting crucible made of iron' Thus, a billet was cast.

However, cadmium (Cd) has a property of being easily converted to cadmium oxide (CdO) because it is highly acidic and reacts sensitively with air, and cadmium oxide has yellow-green, brown, red, and black colors depending on the particle size and bonding.

In addition, cadmium oxide (CdO) has a lower density than the AgCd molten metal, so it is located on the upper side of the molten metal or is stirred by a high frequency to exist in the AgCd molten metal.

After melting in the crucible, when the molten metal is poured into the 'casting crucible', cadmium oxide (CdO), an impurity, is inherent in the billet.

However, cadmium oxide (CdO) contained in the billet has a problem of lowering the electrical properties. In particular, when wire drawing is performed after extruding the billet in the subsequent process, cadmium oxide (CdO) appears as an impurity, and the wire There was a problem that even occurred to the phenomenon of breaking.

Accordingly, one of the technical problems of the embodiment is to provide a carbon mold crucible for electrical contact that prevents cadmium oxide (CdO) acting as an impurity from being inherent in the billet.

2a to 2c, the electric contact billet manufacturing apparatus 1000 according to the embodiment includes a molten metal crucible 10 for dissolving the first molten metal M1 for electrical contact, and the molten metal crucible 10 at the lower side. It may include an electric thermal insulation furnace 100 for molten electrical contact to be disposed, a carbon mold crucible 210 for electrical contacts, and a device for detaching and moving the carbon mold crucible 220 .

The molten metal crucible 10 may be heated through high-frequency induction heating using a predetermined heating coil H, but is not limited thereto.

In the embodiment, since the melting of the alloy of the metal for electrical contact is melted using a high-frequency furnace, constant stirring is performed depending on the wavelength, so that it is possible to melt the alloy at a certain rate.

However, as described above, when casting is performed by dissolving a non-acidic metal such as Cd, the metal residues that are scattered as a result of continuous stirring are attached to the billet during casting and cause product defects. there is.

The electric contact billet manufacturing apparatus 1000 according to the embodiment, as shown in FIG. 2A , transfers the first molten metal M1 melted in a predetermined molten metal crucible 10 through the molten metal nozzle 12 to an electric heating furnace for molten electrical contact. After being injected into 100 and stabilized, it may be poured into the carbon mold crucible 210 for electrical contact (see FIG. 2b ).

A predetermined impurity (D) may exist in the molten metal crucible 10, and the impurity (D) may include cadmium oxide, but is not limited thereto.

Also, according to the embodiment, as the electric heating furnace 100 for electrical contact molten metal is closely disposed with the molten metal crucible 10, contact with external air is minimized to prevent additional molten metal oxidation, etc. .

Next, referring to FIG. 2C , the electric heating furnace 100 for the electrical contact molten metal may include a variable inlet 120 through which the stabilized second molten metal M2 moves to the carbon mold crucible 210 . The variable inlet 120 has a structure that can be opened so that the stabilized, high-quality second molten metal M2 can move. The electric heating furnace 100 for molten electrical contact is a heating unit ( (not shown) may be included, and the second molten metal M2 may be heated and kept warm at a temperature of about 950 to 980°C.

The second molten metal M2 may be stabilized in the electric heating furnace 100 for the electrical contact molten metal.

In addition, according to the embodiment, as the electric heating furnace 100 for the electrical contact molten metal is closely disposed with the carbon mold crucible 210 for the electrical contact, contact with external air is minimized to prevent additional oxidation of the molten metal, etc. there is.

According to an internal study, when the power is cut off to stabilize the first molten metal M1 in the molten metal crucible 10 , it takes a long time to harden the molten metal and casting is difficult.

Therefore, the inventors of this application make the first molten metal M1 at high frequency and inject the molten metal into the electric heating furnace 100 and then stabilize the temperature while maintaining the temperature. can do.

Accordingly, according to the electric contact billet manufacturing apparatus according to the embodiment, cadmium oxide acting as an impurity by providing an electric heating furnace 100 for electric contact molten metal capable of stabilizing the molten metal and a carbon mold crucible 210 for electric contact (CdO) is not inherent in the billet (billet), there is a technical effect that can provide a high-quality electric contact billet.

In the embodiment, the first molten metal M1 in the molten metal crucible 10 is continuously stirred by high frequency, but artificial stirring may not occur in the electric heating furnace 100 .

According to the embodiment as shown in Figure 2c, the second molten metal M2, which is cleanly stabilized in the electric heating furnace 100, is filled with a carbon mold crucible 210 for electrical contact when the variable inlet 120 such as a graphite rod is opened. can

Next, in the internal technology, molten metal was poured into the 'steel casting crucible' after melting in an induction furnace. However, the 'cast iron casting crucible' has low heat dissipation properties, and as a result, a difference in solidification rate and cooling rate occurs on the outside and inside of the billet, so bubbles and oxide scale are formed on the surface of the billet. Problems such as defects were found.

When a billet with such surface defects and oxide scale defects is processed and used as a contact material, it is causing technical problems that adversely affect the mechanical and electrical properties of the electrical contact.

In addition, the above 'iron casting crucible' had a rough surface when used several times, adversely affecting the surface modification of the billet.

In addition, when the billet solidified in the 'iron casting crucible' is to be separated from the casting crucible, the separation is difficult due to the strong close contact between the billet and the casting crucible, and there is a problem that adversely affects the surface modification of the billet during the separation process.

In addition, the 'iron casting crucible' was made of iron and had a considerable weight, so there was a problem in mobility and workability.

Accordingly, one of the technical problems of the embodiment is to provide an apparatus for manufacturing a billet for electrical contact that can prevent the occurrence of surface defects or oxidized scale defects of the billet.

In addition, one of the technical problems of the embodiment is to provide an apparatus for manufacturing a billet for electrical contact that can solve the problem that the mold crucible adversely affects the surface modification of the billet.

In addition, one of the technical problems of the embodiment is to provide a device for detaching and moving a carbon mold crucible for electrical contact with excellent mobility and workability.

3 is a combined perspective view of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment.

In addition, FIG. 4A is a detailed combined perspective view of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment shown in FIG. 3 .

In addition, FIG. 4B is an exploded perspective view of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment shown in FIG. 4A .

Referring to FIG. 3 , the device 220 for detaching and moving a carbon mold crucible according to the embodiment includes an outer fixing part 221 surrounding the outer portion of the carbon mold crucible 210 for electrical contact, and the outer fixing part 221 of It may include a support part 222 extending from one side and a fastening part 223 for fastening the support part 222 .

4A in more detail, the carbon mold crucible 210 for electrical contact according to the embodiment is in close contact with the first carbon mold crucible 210a and the first carbon mold crucible 210a to form an internal molten metal space and a second carbon mold crucible 210b. The carbon mold crucible 210 for electrical contact may be made of a carbon material.

When the carbon mold crucible 210 according to the embodiment is employed, since temperature controllability is high, the surface modification of the billet (B) can be significantly improved.

For example, the carbon mold crucible 210 according to the embodiment has pores, so it has a high temperature transfer power and improved heat conduction, so that uniform cooling on the inside and outside of the billet may be possible.

Accordingly, according to the embodiment, the difference in the cooling rate between the outside and the inside of the billet is not large and uniform cooling is possible, so there is a technical effect that surface defects such as shells or oxide scale defects do not occur on the surface of the billet.

In addition, when the carbon mold crucible 210 of the embodiment is employed, there is a technical effect of remarkably improving the surface quality in the extrusion and wire drawing process due to the improvement of the surface modification of the billet due to the lubricating properties of carbon.

On the other hand, the mold crucible (mold crucible) must have mobility after the molten metal is poured, and an impact may be applied during movement. On the other hand, when it is assumed that a carbon molded crucible is employed, the carbon molded crucible has a weak point to external impact and can be easily broken, and thus it has not yet been employed as a molded crucible for molten electrical contact.

FIG. 4A is a detailed combined perspective view of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment shown in FIG. 3 .

In addition, FIG. 4B is an exploded perspective view of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment shown in FIG. 4A .

On the other hand, the inventors of this application developed a device for detaching and moving a carbon molded crucible 220 and studied a way to maximize the technical characteristics of the carbon molded crucible.

Specifically, referring to FIG. 4A , the outer fixing part 221 of the detaching and moving device 220 of the carbon mold crucible according to the embodiment is a first external fixing part for fixing one side of the carbon mold crucible 210 . The carbon mold crucible 210 can be stably and firmly fixed by including a 221a and a second outer fixing part 221b for fixing the other outer side of the carbon mold crucible 210 .

In addition, the device 220 for detaching and moving the carbon mold crucible according to the embodiment may include a connection part 225 for coupling the first outer fixing part 221a and the second outer fixing part 221b and making them movable with each other. there is. The connection part 225 may be a light chip, but is not limited thereto.

The carbon mold crucible 210 according to the embodiment is designed as a split mold, and the detachment and movement device 220 of the carbon mold crucible according to the embodiment includes the first outer fixing part 221a and the second outer fixing part 221b. By including the connection part 225 for fastening and mutually movable, the outer fixing part 220 can be opened and closed, so that the final solidified billet can be separated from the carbon mold crucible 210 without damage, thereby improving the quality of the outer surface of the billet There is a special technical effect without physical damage to the carbon mold.

Next, the support part 222 of the device 220 for detaching and moving a carbon mold crucible according to the embodiment includes a first support part 222a extending in a first direction from one side of the first outer fixing part 221a, and the second 2 A second support portion 222b extending in the first direction from one side of the outer fixing portion 221b may be included.

The first support part 222a may be manufactured integrally with the first outer fixing part 221a or may be formed by being coupled to the first outer fixing part 221a.

The second support part 222b may also be manufactured integrally with the second outer fixing part 221b or may be formed by being coupled to the second outer fixing part 221b.

In addition, the fastening part 223 of the detaching and moving device 220 of the carbon mold crucible according to the embodiment fastens the first support part 222a and the second support part 222b so that the outer fixing part 221 is the carbon The mold crucible 210 may be firmly fixed.

The first support part 222a may include a predetermined first recess (not shown), and the second support part 222b also includes a second recess (not shown) at a position corresponding to the first recess. may include

The fastening part 223 may include a first fastening part 223a fastened to the first recess and the second recess and a second fastening part 223b coupled to the first fastening part 223a. there is.

The first fastening part 223a may be a bolt, and the second fastening part 223b may be a nut, but is not limited thereto.

The fastening part 223 may include a third fastening part 223c for reinforcing the second fastening part 223b. For example, the third fastening part 223c may include support bars extending to both sides of the second fastening part 223b, but is not limited thereto.

Next, Figure 5a is a combined perspective view of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to an additional embodiment.

In addition, Figure 5b is an exploded perspective view of the carbon mold crucible 210 for electrical contact and the detachment and movement device 220 of the carbon mold crucible according to the embodiment shown in Figure 5a,

FIG. 5C is a separate photograph of the carbon mold crucible 210 for electrical contact and the device 220 for detaching and moving the carbon mold crucible according to the embodiment shown in FIG. 5A .

The additional embodiments shown in FIGS. 5A to 5C may employ the technical features of the above-described embodiments, and will be described below focusing on the technical features of the additional embodiments.

In a further embodiment, the outer fixing part 221 includes predetermined fixing grooves 221d (refer to FIG. 5B ) penetrating the first outer fixing part 221a or the second outer fixing part 221b, The carbon mold crucible 210 can be more firmly fixed by including a predetermined protruding fixing part 221c fastened to the fixing groove 221d.

For example, the outer fixing part 221 includes nut-shaped fixing grooves 221d penetrating the first outer fixing part 221a or the second outer fixing part 221b, and the fixing groove ( It may include a bolt-shaped protruding fixing part 221c fastened to 221d).

Accordingly, according to a further embodiment, the protrusion fixing part 221c fastened to the fixing groove 221d more firmly fixes the outer edge of the carbon mold crucible 210, so that the first carbon mold crucible 210a and the second The carbon mold crucible 210b may be more firmly adhered to form a mold space therein.

In addition, according to a further embodiment, as shown in FIG. 5b , a plurality of coupling grooves 210h may be further provided on the outer surface of the carbon mold crucible 210 at positions corresponding to the protruding fixing parts 221c.

Accordingly, according to an additional embodiment, the protrusion fixing part 221c fastened to the fixing groove 221d is fastened to the coupling groove 210h of the carbon mold crucible 210, so that the first carbon mold crucible 210a and the second 2 The carbon mold crucible 210b can be firmly fixed in close contact.

Also, referring to FIG. 5C , the protrusion fixing part 221c of the outer fixing part 221 is firmly fastened to the coupling groove 210h of the carbon mold crucible 210, so that the first outer fixing part 221a and the The first carbon mold crucible 210a may be operated as one fixed integral structure, and the second outer fixing part 221b and the second carbon mold crucible 210b may also be operated as one fixed integral structure. can

For example, when an operator moves the first support part 222a and the second support part 222b away from both sides as shown in FIG. 5C , the first carbon mold crucible 210a and the second carbon mold crucible 210b ) is transformed into a split mold so that the internal billet can be easily separated.

Accordingly, the carbon mold crucible 210 according to the embodiment may be designed as a split mold, and the device 220 for detaching and moving the carbon mold crucible of the embodiment includes the first outer fixing part 221a and the second outer fixing part 221b. ) and including a connection part 225 to make it mutually movable, it is possible to open and close the outer fixing part 220, so that the final solidified billet can be separated from the carbon mold crucible 210 without damage, so the outer surface quality of the billet There is a special technical effect, which is improved and there is no physical damage to the carbon mold.

As described above, according to the embodiment, there is a technical effect that can provide an apparatus for manufacturing a billet for electrical contacts that prevents cadmium oxide (CdO) acting as an impurity from being inherent in the billet.

For example, according to the electric contact billet manufacturing apparatus according to the embodiment, cadmium oxide (CdO), which acts as an impurity, acts as an impurity There is a technical effect that can provide a high-quality electric contact billet by not being embedded in the billet.

In addition, according to the embodiment, there is a technical effect that can provide a billet manufacturing apparatus for electrical contacts that can prevent the occurrence of surface defects or oxide scale defects of the billet.

For example, the carbon mold crucible 210 according to the embodiment has pores, so it has a high temperature transfer power and improved heat conduction, so that uniform cooling on the inside and outside of the billet may be possible.

Accordingly, according to the embodiment, the difference in the cooling rate between the outside and the inside of the billet is not large and uniform cooling is possible, so there is a technical effect that surface defects such as shells or oxide scale defects do not occur on the surface of the billet.

In addition, according to the embodiment, there is a technical effect that can provide a billet manufacturing apparatus for electrical contact that can solve the problem that the mold crucible adversely affects the surface modification of the billet.

For example, when the carbon mold crucible 210 of the embodiment is employed, there is a technical effect of remarkably improving the surface quality in the extrusion and wire drawing processes by improving the surface modification of the billet due to the lubricity of carbon.

In addition, according to the embodiment, there is a technical effect that can provide a device for removing and moving the carbon mold crucible for electrical contact excellent in mobility and workability.

For example, the carbon mold crucible 210 according to the embodiment is designed as a split mold, and the detachment and movement device 220 of the carbon mold crucible according to the embodiment includes the first outer fixing part 221a and the second outer fixing part. Since the outer fixing part 220 can be opened and closed by including the connecting part 225 to fasten the 221b and to be mutually movable, the final solidified billet can be separated from the carbon mold crucible 210 without damage, so that the outside of the billet It has a special technical effect that the surface quality is improved and there is no physical damage to the carbon mold.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and variations should be interpreted as being included in the scope of the embodiments.

In the above, the embodiment has been mainly described, but this is only an example and does not limit the embodiment, and those of ordinary skill in the art to which the embodiment belongs are provided with several examples not illustrated above within the range that does not deviate from the essential characteristics of the embodiment. It can be seen that the transformation and application of branches are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And the differences related to these modifications and applications should be interpreted as being included in the scope of the embodiments set forth in the appended claims.

Claims (10)

Molten metal crucible for melting molten metal for electrical contact;
an electric heating furnace for electric contact molten metal to receive and stabilize the electric contact molten metal melted in the molten metal crucible; and
and a carbon mold crucible for electrical contacts disposed below the electric heating furnace for molten metal for electrical contacts, and into which a molten metal space is formed inside to pour the stabilized molten metal for electrical contacts. According to claim 1,
The electric heating furnace for the electrical contact molten metal is disposed in contact with the lower side of the molten metal crucible,
In the electric heating furnace for molten electrical contact, the molten metal melted in the molten metal crucible is injected into the electrical heating furnace for molten electrical contact through a molten metal nozzle provided on the lower side of the molten metal crucible. According to claim 1,
The carbon mold crucible for the electrical contact,
A first carbon mold crucible disposed below the electric heating furnace for molten electrical contact and a second carbon mold crucible in close contact with the first carbon mold crucible to form a molten metal space therein, an electrical contact billet manufacturing apparatus. According to claim 1,
A device for detaching and moving a carbon mold crucible comprising an outer fixing part surrounding the outer periphery of the carbon mold crucible for electrical contact, a supporting part extending from one side of the outer fixing part, and a fastening part for fastening the supporting part; further comprising, Billet manufacturing equipment for electrical contact. 5. The method of claim 4,
The outer fixing part of the detachment and movement device of the carbon mold crucible,
a first outer fixing part for fixing one outer side of the carbon mold crucible, and a second outer fixing part for fixing the other outer side of the carbon mold crucible; and a connection part for fastening the first outer fixing part and the second outer fixing part and allowing mutual movement. 6. The method of claim 5,
The support portion of the desorption and movement device of the carbon mold crucible
a first support part extending in a first direction from one side of the first outer fixing part; and a second support part extending in the first direction from one side of the second outer fixing part;
The first support portion includes a predetermined first recess, the second support portion includes a second recess at a position corresponding to the first recess,
The fastening part, the apparatus for manufacturing a billet for electrical contact comprising a first fastening part fastened to the first recess and the second recess and a second fastening part coupled to the first fastening part. an electric heating furnace for molten electrical contact that receives and stabilizes the molten metal for electrical contact melted in a predetermined molten metal crucible; and
a carbon mold crucible for electrical contact, which is disposed below the electric heating furnace for molten electrical contact and includes a first carbon mold crucible and a second carbon mold crucible in close contact with the first carbon mold crucible to form a molten metal space therein; and
A device for detaching and moving a carbon mold crucible comprising an outer fixing part surrounding the outer periphery of the carbon mold crucible for the electrical contact, a support part extending from one side of the outer fixing part, and a fastening part for fastening the support part, Electrical contact For billet making equipment. 8. The method of claim 7,
The outer fixing part of the detachment and movement device of the carbon mold crucible,
a first outer fixing part for fixing one outer side of the carbon mold crucible, and a second outer fixing part for fixing the other outer side of the carbon mold crucible; and a connection part for fastening the first outer fixing part and the second outer fixing part and allowing mutual movement. 9. The method of claim 8,
The support portion of the desorption and movement device of the carbon mold crucible
A billet manufacturing apparatus for electrical contacts, comprising: a first support part extending in a first direction from one side of the first outer fixing part; and a second support part extending in the first direction from one side of the second outer fixing part. 10. The method of claim 9,
The outer fixing part includes a predetermined fixing groove passing through the first outer fixing part and the second outer fixing part, and a protruding fixing part fastened to the fixing groove,
The outer surface of the carbon mold crucible includes a plurality of coupling grooves at positions corresponding to the protruding fixing parts,
The protruding fixing part of the outer fixing part passes through the fixing groove and is fastened to the coupling groove of the carbon mold crucible, an electrical contact billet manufacturing apparatus.

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