KR20160149530A - Ingot molding apparatus - Google Patents

Abstract

According to the present invention, an ingot molding apparatus is disclosed. According to the present invention, the ingot molding apparatus comprises: a mold body unit forming a main body unit of an ingot; a shrink head frame unit coupled to an upper portion of the mold body unit, and forming a shrink head unit of the ingot; and an insulation board having two types of insulation materials in which fire resistance and heat insulation properties are different, and coupled to the shrink head frame unit.

Description

{INGOT MOLDING APPARATUS}

The present invention relates to an ingot mold apparatus, and more particularly, to an ingot mold apparatus for casting an ingot.

An ingot is a material for free forging and has a shape including a body portion which is a portion used for actual forging and a pressing portion which is formed for directivity solidification of the body portion. In general, the directional solidification means that the molten metal is cooled from one side of the casting during the solidification of the molten metal and the solidification proceeds in one direction.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2014-0098376 (Registered on August 4, 2014, entitled "Ingot Manufacturing Facility").

According to an embodiment of the present invention, there is provided an ingot mold apparatus capable of further improving the quality of an ingot and a forging product.

An ingot mold apparatus according to the present invention comprises: a mold main body portion forming a body portion of an ingot; An impregnation frame portion coupled to an upper portion of the mold body portion and forming an impression portion of the imprint; And a heat insulating board including different types of heat insulating materials having different fire resistance and heat insulating properties and being coupled to the heat sink frame part.

The heat insulating board may further include: a board part coupled to the casting mold part; And a stagnation preventing portion formed at a lower portion of the board portion and formed to be inclined toward the main body portion or the inner surface portion of the pushing portion.

The heat insulating board may include: a heat insulating part having a heat insulating property capable of lowering a solidifying speed of the molten steel; And a refractory portion coupled to the heat insulating portion and having a refractory property with respect to the molten steel and contacting the molten steel.

Further, the heat insulating portion includes a silica material.

The heat insulating portion may include: a first heat insulating portion including a silica material; And a second adiabatic part adjacent to the first adiabatic part and having an adiabatic hole part capable of receiving air.

In addition, the present invention may further include a sensor unit for sensing a temperature of the heat insulating unit through the heat insulating hole.

It is preferable that the refractory portion includes a magnesia material.

The refractory portion may include: a refractory main portion contacting the inner surface portion of the heat insulating portion; A lower cover portion protruding toward the heat insulating portion at a lower portion of the refractory main body portion and in contact with the molten metal mold portion; And a receiving part formed on the lower cover part and supporting the heat insulating part at a lower end.

According to the ingot mold apparatus of the present invention, when the heat insulating board is formed of a different kind of heat insulating material having different fire resistance and heat insulating property, if the molten steel and the contact portion are made of a material having relatively high fire resistance, It is possible to prevent damage due to continuous exposure to the molten steel, thereby stably maintaining the heat insulating performance, and also to prevent defects and deterioration in the quality of the ingot due to the incorporation of a part of the heat insulating member, And the quality of the forged product can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a main part schematically showing an ingot mold apparatus according to an embodiment of the present invention. FIG.
Fig. 2 is a cross-sectional view of the main portion showing an enlarged view of a portion A in Fig. 1;
3 is a cross-sectional perspective view schematically illustrating an insulating board of an ingot mold apparatus according to an embodiment of the present invention.
4 is a cross-sectional perspective view schematically illustrating a heat insulating board of an ingot mold apparatus according to another embodiment of the present invention.

Hereinafter, an embodiment of the ingot mold apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a cross-sectional view of a main part schematically showing an ingot mold apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part enlargedly showing part A of FIG. 1, FIG. 4 is a cross-sectional perspective view schematically showing a heat insulating board of an ingot mold apparatus according to another embodiment of the present invention. FIG. 4 is a cross-sectional perspective view schematically showing a heat insulating board of an ingot mold apparatus according to another embodiment of the present invention.

Referring to FIG. 1, an injection molding apparatus 1 according to an embodiment of the present invention includes a mold main body 10, a molten metal mold 20, a heat insulating board 30, and a sensor unit 40.

The mold main body portion 10 is a portion forming the main body portion 2a of the ingot 2 and has a size corresponding to the size and shape of the main body portion 2a. The casting mold part 20 is a part forming the pressing part 2b of the ingot 2 and is formed so as to communicate with the upper part of the casting mold part 10. In the description of the present invention, the state of a forged material having a fluid form is divided into molten steel and molten steel into a state in which the molten steel is solidified in the mold main body portion 10 and the molten metal mold portion 20.

When the molten steel is injected onto the inner space portion formed together with the mold main body portion 10 and the molten metal mold portion 20, the molten steel fills the inner space portion of the mold main body portion 10, . After the portion corresponding to the trunk portion 2a is first solidified, the portion corresponding to the crushing portion 2b is solidified.

The pressure portion 2b can be supplemented by the pressure portion 2b to be contracted in the solidification step so that the bubble on the body portion 2a can be compressed And can be discharged to the outside of the molten steel through the molten metal portion 2b. After the molten metal is injected and solidified, the ingot 2 having a shape in which the body part 2a and the pressing part 2b are integrally connected is manufactured.

The heat insulating board 30 is made of a heat insulating material capable of insulating the molten steel inside the casting mold frame 20 with the casting mold frame 20 in contact with the atmosphere so that the solidification of the pressing unit 2b progresses more slowly than the body 2a, And a heat insulating material having fire resistance against high temperature molten steel, and is joined to the casting mold frame portion 20. The heat insulating board 30 according to an embodiment of the present invention includes a heat insulating material having a different heat insulating property and a different fire resistance. That is, it includes a first material and a second material different in heat insulation and fire resistance.

Referring to FIGS. 1 and 2, the heat insulating board 30 according to an embodiment of the present invention includes a board portion 31 and a stagnation preventing portion 39.

The board 31 includes a heat insulating material capable of insulating the molten steel inside the casting mold part 20 with the casting mold part 20 and is joined to the inner surface of the casting mold part 20. [ Referring to FIGS. 2 and 3, the board 31 according to an embodiment of the present invention includes a heat insulating portion 32 and a refractory portion 35.

The heat insulating portion 32 is made of a first material having excellent heat insulation properties as compared with the refractory portion 35, having fire resistance and heat insulating property against molten steel. For example, when the molten steel has a temperature of 1500 ° C, the heat insulating portion 32 may be made of a silica material having a melting temperature of 1600 to 1800 ° C and an insulating performance.

By applying the silica material as the material of the heat insulating portion 32, the heat insulating property for lowering the solidifying speed of the molten steel can be stably secured. The heat insulating part 32 according to the present invention is preferably made of a silica material such as a silica board. However, the material of the heat insulating part 32 according to the present invention is not limited to a silica material, Various other materials including ceramic materials can be applied.

The refractory portion 35 is made of a second material having fire resistance and heat insulating property against molten steel and excellent in fire resistance as compared with the heat insulating portion 32. For example, when the molten steel has a temperature of 1500 DEG C and the heat insulating portion 32 has a melting temperature of 1600 to 1800 DEG C, the refractory portion 35 is made of a magnesia material having a melting temperature of 2600 to 2800 DEG C Can be applied.

By applying the magnesia material as the material of the refractory portion 35, the fire resistance against molten steel can be stably secured. The refractory portion 35 according to the present invention is preferably applied with a magnesia material such as a magnesia board. However, the material of the refractory portion 35 according to the present invention is not limited to the magnesia material, Various other materials can be applied.

The heat insulating portion 32 is formed on the contact portion of the heat insulating board 30 with the molten metal mold portion 20 and the refractory portion 35 is formed on the contact portion of the heat insulating board 30 with the molten steel. The heat insulating portion 32 and the refractory portion 35 are separately made of different materials and are integrally joined together and then joined to the casting mold portion 20 or sequentially joined to the inner surface portion of the casting mold portion 20.

Referring to FIGS. 2 and 3, the heat insulating portion 32 according to an embodiment of the present invention includes a first heat insulating portion 33 and a second heat insulating portion 34.

The first heat insulating portion 33 has a board shape having a constant thickness. The side surface portion of the first heat insulating portion 33 has a curved surface shape curved in an arc shape corresponding to the inner surface portion of the casting mold portion 20. [ As the first heat insulating portion 33 has a certain thickness, it is possible to uniformly impart the heat insulating property over the entire circumference of the heat sink mold portion 20 to which the first heat insulating portion 33 is coupled.

The second heat insulating portion 34 is provided adjacent to the first heat insulating portion 33 with a heat insulating hole portion 34a in which air can be received. 2 and 3, the second heat insulating part 34 is disposed between the first heat insulating part 33 and the casting mold part 20, Or between the first heat insulating portion 33 and the second heat insulating portion 33. [ A pair of the second heat insulating portions 34 may be disposed on both sides of the first heat insulating portion 33 or a pair of the first heat insulating portions 33 may be disposed on both sides of the second heat insulating portion 34. [

A plurality of the heat insulating holes 34a are uniformly arranged over the second heat insulating portion 34. [ The heat insulating hole portion 34a may have various cross-sectional shapes including a circle, a square, and the like as shown in Figs. When the heat insulating hole portion 34a has a circular cross-sectional shape, the edge portion of the heat insulating hole portion 34a comes into contact with the air inside the entire circumference to a certain degree, thereby ensuring more uniform heat insulating property in each of the heat insulating hole portions 34a can do. Further, when the heat insulating hole portion 34a has a rectangular cross-sectional shape, the heat insulating hole portion 34a can be formed at a larger ratio with respect to the entire area of the second heat insulating portion 34. [

The air on the heat insulating hole portion 34a serves as a heat insulating air layer for insulating the first heat insulating portion 33 with another neighboring member. The heat insulating board 30 according to the present invention can be made lighter in weight by the second heat insulating portion 34 having the heat insulating hole portion 34a and can be stably provided with the heat insulating performance throughout the heat insulating portion 32 have.

The stagnation preventing portion 39 is a portion forming a sloped surface such that a step portion is formed at a lower portion of the board portion 31 in which molten steel is stagnated. The stagnation preventing portion 39 is formed to be inclined so as to be closer to the mold body portion 10 or the pressing portion 2b toward the lower side.

In order to prevent the upper part of the molten steel 2 from being exposed to the atmosphere to be oxidized, a coating layer 3 is formed on the upper part of the molten steel 2 by injecting a powder-form oxide- The coating layer 3 serves as a coating layer for preventing re-oxidation of the molten steel 2.

According to the stagnation preventing portion 39 according to the present invention, it is possible to prevent the part of the coating layer 3 from stagnating at the lower portion of the heat insulating board 30, thereby stably maintaining the oxidation preventing performance of the coating agent itself, It is possible to prevent defects and quality deterioration of the ingot due to a part of the film layer 3 stagnating in the lower portion of the board 30 being mixed into the molten steel 2.

Referring to FIGS. 2 and 3, the refractory portion 35 according to an embodiment of the present invention includes a refractory body portion 36, a lower cover portion 37, and a receiving portion 38.

The refractory main body portion 36 has a board shape facing the inner surface portion of the heat insulating portion 32. The lower cover portion 37 is formed to protrude from the lower end of the refractory main body portion 36 toward the heat insulating portion 32 and abuts against the casting mold portion 20. The stagnation preventing portion 39 is formed on the bottom surface portion of the lower cover portion 37. The inner surface portion of the heat insulating portion 32 is covered by the refractory body portion 36 and the lower cover portion 37 covers the lower portion of the heat insulating portion 32 to stably prevent direct contact of the molten steel with the heat insulating portion 32 can do.

Accordingly, it is possible to prevent a part of the heat insulating board 30, particularly, the heat insulating part 32 from being damaged due to the continuous exposure to the high-temperature molten steel, to stably maintain the heat insulating performance by the heat insulating part 32 And it is also possible to prevent deterioration of the quality and deterioration of the ingot caused by a part of the heat insulating portion 32 melted by the molten steel mixed with the molten steel.

The pedestal portion 38 is provided at the upper portion of the lower cover portion 37 to support the heat insulating portion 32 at the lower end thereof. The support portion 38 is formed in a horizontal plane with a width corresponding to the bottom portion of the heat insulating portion 32. The heat insulating portion 32 may be seated on the receiving portion 38 or the receiving portion 38 may be brought into contact with the bottom face portion of the heat insulating portion 32 in order to join the heat insulating portion 32 and the refractory portion 35 The heat insulating portion 32 and the refractory portion 35 can be reliably assembled and coupled.

The sensor part 40 is a sensor device for sensing the temperature of the heat insulating part 32. By measuring the temperature of the heat insulating portion 32, it is possible to determine whether or not the heat insulating portion 32 is damaged. The sensor unit 40 is installed at a plurality of points spaced apart from each other along the periphery of the casting mold unit 20 so that the damage of each part of the heat insulating board 30 can be recognized. If the temperature of the heat insulating portion 32 is higher than the target set temperature in a state where the working conditions are constant, it is judged that the heat insulating board 30 is damaged or its life is over and replaced with a new one, The heat insulating property can be uniformly given.

The sensor unit 40 according to the present invention can be applied to a noncontact type temperature sensor. The sensor mounting hole 34b is opened at the upper part of the heat insulating hole 34a. It is possible to expose the sensing portion of the sensor portion 40 to the inside of the heat insulating hole portion 34a. The temperature of the heat insulating part 32 can be reliably measured without heat damage to the sensor part 40 while the sensing part of the sensor part 40 is exposed in the heat insulating hole part 34a.

According to the ingot mold apparatus 1 of the present invention having the above-described structure, when the heat insulating board 30 is formed of a different kind of heat insulating material having different fire resistance and heat insulating property, It is possible to prevent the part of the heat insulating board 30 from being damaged due to the continuous exposure to the hot molten steel and thus to maintain the heat insulating performance stably and also to prevent the heat insulating board 30, It is possible to prevent defects and deterioration of the quality of the ingot due to the incorporation of a part of the molten steel into the molten steel, and to improve the quality of the forging product.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

1: Ingots Molding device 2: Ingots
2a: body part 2b: pressing part
10: Mold body part 20:
30: Insulation board 31: Board part
32: heat insulating portion 33: first heat insulating portion
34: second heat insulating portion 34a:
34b: sensor mounting hole portion 35: refractory portion
36: Refractory main body part 37: Lower cover part
38: Support part 39: Static prevention part
40:

Claims (8)

A mold body portion forming a body portion of the ingot;
An impregnation frame portion coupled to an upper portion of the mold body portion and forming an impression portion of the imprint; And
And a heat insulating board which is made of a different type of heat insulating material having different fire resistance and heat insulating property, and is bonded to the heat sink frame part.
The method according to claim 1,
Wherein the heat-
A board unit coupled to the die assembly; And
And an stagnation preventing portion formed at a lower portion of the board portion and inclined toward an inner surface portion of the mold body portion or the pushing portion.
3. The method according to claim 1 or 2,
Wherein the heat-
A heat insulating portion capable of reducing the solidification speed of molten steel; And
And a refractory portion coupled to the heat insulating portion and having a refractory property with respect to the molten steel, the refractory portion contacting the molten steel.
The method of claim 3,
Characterized in that the heat insulating portion comprises a silica material.
The method of claim 3,
The heat-
A board-shaped first heat insulating portion; And
And a second heat insulating portion disposed adjacent to the first heat insulating portion and having a heat insulating hole portion capable of receiving air.
6. The method of claim 5,
And a sensor part for sensing the temperature of the heat insulating part through the heat insulating hole part.
The method of claim 3,
Wherein the refractory portion comprises a magnesia material.
The method of claim 3,
The fire-
A refractory main body portion contacting the inner surface portion of the heat insulating portion;
A lower cover portion protruding toward the heat insulating portion at a lower portion of the refractory main body portion and in contact with the molten metal mold portion; And
And a support part formed on the lower cover part and supporting the lower end of the heat insulating part.

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