KR102041073B1 - Casting mold system for discharging gas - Google Patents

Abstract

The present invention relates to a casting mold system comprising: a base frame part having an upper surface open to accommodate a sand for casting through the open upper surface, and forming a lower part of the mold of a mold product through the sand for casting; and a cover frame part disposed on an upper part of the base frame part, accommodating sand for casting, and forming an upper part of the mold of the mold product. Therefore, the present invention is capable of minimizing an additional energy inputted for uniform natural cooling at each position of the cast mold product.

Description

Casting mold system with gas discharge function {Casting mold system for discharging gas}

The present invention relates to a casting mold system, and more particularly, to easily discharge the gas generated during the natural cooling process of the product to be cast in the mold, as well as to partially recycle and recycle the heat of the generated gas product It is a technical field of a casting mold system having a gas discharge function to ensure the uniformity of the tissue for each part of the quality of.

In the case of casting technology, it is the foundation of the root industry that has been with human history with the appearance of bronze casting since the beginning of the Bronze Age after the Stone Age.

In the case of casting technology, except for the know-how and unique process that each manufacturer has, the final product is generally produced through processes such as pattern creation, mold creation, mold assembly, pouring, cooling, casting removal, machining, and inspection. Done.

In the case of such casting technology, the recent 3D printer has given out part of the technology, but in the area of products requiring high precision, or in the area of products requiring complexity and organizational density, 3D printers have not been able to surpass yet. Part exists.

Although the speed of technological development related to casting technology is somewhat slower than the speed of innovation in other industries, such as IT or bio-bio, the efforts to improve the quality of cast products, such as the precision of products, are constantly being have.

As a related prior patent document, there exists a "method of manufacturing a high-efficiency cooling plate for casting molds (Publication No. 10-2018-0120440, hereinafter referred to as Patent Document 1)."

Prior art according to Patent Document 1 relates to a method for manufacturing a high-efficiency cooling plate for casting mold, characterized in that it has a long length of cooling holes to improve the cooling performance in the cooling water distribution by changing the circular cooling holes to elliptical The elliptical hole shape of is determined as the ratio of the horizontal length to the vertical length and is represented by 10.b ≥ a ≥ 2.b.

The production method according to Patent Literature 1 includes a process for preparing an ingot for preparing a plate-shaped ingot by melting and casting copper phosphate or copper alloy such as CuAgP or CuCrZr having excellent thermal conductivity at a high temperature; A cooling hole forming process of forming cooling holes in the longitudinal direction during molding of the prepared ingot; Deformation material filled with finishing materials to prevent the cooling holes from being deformed into shapes other than the intended shape or from being damaged by the formation of holes or divots while inducing the cooling holes to the desired shape. Filling process; Deforming process by pressing the cooling plate to deform to have a desired length and width; It is characterized in that the deformant removal process for removing the deformable material filled in the cooling hole of the cooling plate is completed deformation.

Further, there is a "mold-movable mold (registration number 10-0782724, hereinafter referred to as patent document 2) corresponding to deformation of the cast steel".

The invention according to Patent Document 2 relates to a mold in which molten steel is solidified in a continuous casting process, and the casting direction is naturally shifted due to bending of the cast steel, thereby improving the quality defects such as internal cracks in the cast steel. It relates to a tiltable mold corresponding to the deformation of the bias.

In the invention according to Patent Literature 2, a cooling water is introduced into the inside of the main body, and connected to a vibrator frame to the outside thereof, and the vibration is applied, and in the continuous casting mold for solidifying the molten steel contained therein to produce a cast steel, the main body Rotating shaft is formed on the outer surface of the front and rear, respectively, and the rotating shaft of the main body is mounted on the vibrator frame by the support frame part which allows the inclined rotation of the front, rear and left and right directions to be freely drawn to the bender side of the lower body It provides a tiltable mold configured to be tilted to match the drawn center of the cast piece to prevent deformation of the cast piece.

In addition, there exists a "two or more kinds of performing methods (the registration number 10-1012836, hereinafter patent document 3)" in the same tundish.

The invention according to Patent Literature 3 relates to a method of performing two or more steel casts in the same tundish, which enables the production of two steel slabs without replacing the tundish, and its configuration is a steel grade of the ladle supplied from the ladle to the tundish. If the molten steel of the tundish supplied from the ladle is supplied to the mold of the player more than two-thirds when the steel grades of the waiting ladles to be supplied to the tundish afterwards are different from each other, the casting speed of the mold is reduced. At the same time, the molten steel outlet of the tundish is blocked by the tundish molten steel outlet opening and closing means, and the mixed band is introduced into the molten steel upper surface of the mold while supplying an inert gas thereto so that the mixed band covers the molten steel upper surface of the mold. Successively raise the tundish to the top, and then stop supplying the inert gas while supplying the molten steel of the waiting ladle to the tundish and This in turn given by opening the liquid steel outlet of the tundish to prevent the dish was molten steel is supplied to the mold to the casting to the original position, and at the same time be made of a rising tundish.

In addition, there exists a "continuous casting method of aluminum-zinc alloy ingot (registration number 10-1220439, hereafter patent document 4)."

The invention according to Patent Document 4 relates to a continuous casting apparatus of an Al-Zn alloy ingot and a continuous casting method of an Al-Zn alloy ingot, which comprises: a) obtaining an Al molten metal by injecting an Al ingot into a melting furnace of 680 ° C to 770 ° C. ; b) injecting a Zn ingot while maintaining the Al melt temperature at a temperature of 600 ° C. or lower to obtain an Al—Zn alloy melt; c) tapping the molten Al-Zn alloy; d) degassing the molten Al-Zn alloy molten metal in an external degassing tank; e) casting the degassed Al-Zn alloy in an ingot mold; f) terminating the tapping when the Al-Zn alloy molten metal is tapped 20-50% and raising the temperature of the heating furnace to 680 ° C to 770 ° C to inject Al ingot; g) The technical gist consisting of the steps b) to f) are repeated. As a result, it is possible to continuously cast Al-Zn alloy ingots, thereby improving work efficiency.

Moreover, there exists a "full mold casting method (registration number 10-1735399, hereafter patent document 5)."

The invention according to Patent Document 5 relates to a full mold casting method, and particularly, to provide a full mold casting method capable of improving the strength of a part of a casting.

In the full mold casting method of the invention according to Patent Document 5, an insertion groove is formed in a part of a model made of expanded polystyrene, and a part or all of the pre-fabricated cast steel is inserted into the insertion groove, followed by a conventional full mold casting method. It is characterized by casting a casting.

In the case of the existing prior patent documents, there have been attempts of technical improvement in various material properties or mechanical design areas, but by integrating with IT technology, the compactness of the tissue due to the three-dimensional uniform cooling of the casting mold There is no technical attempt to equip.

Publication No. 10-2018-0120440 Registration No. 10-0782724 Registration No. 10-1012836 Registration No. 10-1220439 Registration No. 10-1735399

The casting mold system having a gas discharge function according to the present invention has been devised to solve the conventional problems as described above, and presents the following problems to be solved.

First, the mechanical properties and material properties of each part of the cast mold product can be built.

Second, to minimize the additional energy input separately for uniform natural cooling for each position of the cast mold product.

Third, to artificially adjust the temperature of each position of the product of the casting mold, it is intended to prevent the energy pull phenomenon of a specific position.

The problem of the present invention is not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Casting mold system having a gas discharge function according to the present invention has the following problem solving means for the above problem to be solved.

A casting mold system having a gas discharge function according to the present invention has a base open to receive a sand for casting through the open top, and to form a lower portion of the mold of the mold product through the sand for casting. A frame portion; And a cover frame part disposed on the base frame part and accommodating sand for casting and forming an upper portion of the mold of the molded product, wherein the cover frame part forms a body of the cover frame part and receives the casting. A side frame for closing the side of the sand for preventing the sand of the casting sand from being lost; A plurality of holding bars protruding from an outer surface of the side frame to release heat applied to the side frame; A plurality of gas discharge holes formed to penetrate the side frame to discharge gas generated from the melt injected into the mold; And inner passages in the longitudinal direction of the holding bar, respectively, and through which the holding bar penetrates the side frame at a position attached to the side frame to discharge gas generated from the melt injected into the mold. The base frame includes a pair of side bars forming a longitudinal body of the base frame and forming sidewalls to prevent loss of the casting sand in the lateral direction; A pair of bridge bars interconnecting one side and the other side of the pair of side bars, forming a unidirectional body of the base frame, and forming side walls to prevent loss of the side sand of the casting sand; And a supporting bar protruding from a lower portion of the pair of side bars or the pair of bridge bars to separate the pair of side bars and the bridge bar from the ground.

The casting mold system having a gas discharge function according to the present invention is provided in the sand for casting and disposed away from the outer surface of the mold to accommodate gas generated from the melt flowing into the mold, and accommodated therein. It may be characterized in that it further comprises a heating frame portion for circulating the outer surface of the mold to circulate the heat energy of the melt contained in the mold along the outer surface of the mold.

The heating frame part of the casting mold system having a gas discharge function according to the present invention, the gas is formed spaced apart from the outer surface of the mold, a plurality of gas inlet hole for receiving the gas generated from the melt injected into the mold It may be characterized by including a flow tube.

The heating frame part of the casting mold system having a gas discharge function according to the present invention is formed in contact with the outer circumferential surface of the gas flow tube along the longitudinal direction of the gas flow tube, to generate heat by flowing current It may be characterized by further comprising a plurality of heating wires to heat the gas flow tube.

The casting mold system having a gas discharge function according to the present invention further includes a heating control unit (HCU) unit electrically connected to each of the plurality of heating wires and selectively supplying current to each of the plurality of heating wires. The HCU unit may include: a power supply unit connected to the heating wire to supply a current to the heating wire; An address allocator configured to assign an individual address number to each of the plurality of heating wires surrounding the mold; And a selection designation unit to selectively designate the address number assigned by the address allocator so that only a heating wire corresponding to the selected address number is selectively supplied with current.

Casting mold system having a gas discharge function according to the invention of the configuration as described above provides the following effects.

First, the gas generated from the melt in the mold is properly discharged to prevent a phenomenon in which the quality of the molded product is degraded due to the excessive accumulation of gas.

Secondly, the heating frame part spaced from the mold and wound around the outside of the mold draws in gas generated from the melt, and allows the drawn gas to circulate outside of the mold so that the outside of the mold is cooled to a uniform temperature.

Third, allow the HCU to selectively heat the heating wire, helping to uniformly cool the mold.

The effects of the present invention are not limited to those mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is an overall perspective view of a casting mold system having a gas discharge function according to an embodiment of the present invention.
Figure 2 is a perspective view showing a part of the casting sand is removed from the casting mold system having a gas discharge function according to an embodiment of the present invention.
3 is a perspective view illustrating a heating frame 300 spaced apart from a casting mold of a casting mold system having a gas discharge function according to an exemplary embodiment of the present invention.
Figure 4 illustrates a gas flow tube and heating wire of the heating frame of the casting mold system having a gas discharge function according to an embodiment of the present invention.
Figure 5 shows that the heating wire and the HCU portion of the casting mold system having a gas discharge function according to an embodiment of the present invention is electrically connected.
Figure 6 is a block diagram of the HCU portion of the casting mold system having a gas discharge function according to an embodiment of the present invention.

The casting mold system having a gas discharge function according to the present invention may be modified in various ways and may have various embodiments. Specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the technical spirit and scope of the present invention.

1 is an overall perspective view of a casting mold system having a gas discharge function according to an embodiment of the present invention. Figure 2 is a perspective view showing a part of the casting sand is removed from the casting mold system having a gas discharge function according to an embodiment of the present invention. 3 is a perspective view illustrating a heating frame 300 spaced apart from a casting mold of a casting mold system having a gas discharge function according to an exemplary embodiment of the present invention. Figure 4 illustrates a gas flow tube and heating wire of the heating frame of the casting mold system having a gas discharge function according to an embodiment of the present invention. Figure 5 shows that the heating wire and the HCU portion of the casting mold system having a gas discharge function according to an embodiment of the present invention is electrically connected. Figure 6 is a block diagram of the HCU portion of the casting mold system having a gas discharge function according to an embodiment of the present invention.

In the case of a casting mold system having a gas discharge function according to the present invention, as shown in Figs. 1 and 2, after the melt is poured into the mold in the casting mold, when the melt is cooled and hardened, sand (2) Is a technical field of obtaining the mold product 1 by removing the mold).

First, as shown in FIGS. 1 and 2, the base frame part 200 and the cover frame part 100 are included.

In the case of the base frame part 200, the bottom base frame of the casting mold system having a gas discharge function according to the present invention is formed, the upper surface of which is open, and the sand for casting through the open upper surface 2 ) And to form the lower part of the mold of the mold product 1 through this casting sand (2).

The cover frame part 100 is disposed above the base frame part 200.

The cover frame part 100 receives the casting sand 2, which forms an upper portion of the mold of the mold product 1.

The upper part of the mold formed by the cover frame part 100 and the lower part of the mold formed by the base frame part 200 do not occupy 50%, respectively. The ratio may vary depending on the shape of the mold according to the mold product, the volume and mass of the melt, and the properties of the sand 2.

1 and 2, the cover frame part 100 includes a side frame 110, a plurality of holding bars 120, a plurality of gas discharge holes 111, and a gas through tube 121. can do.

First, in the case of the side frame 110 to form a body (body) of the cover frame 100, and closes the side of the casting sand (2) to receive to prevent any loss of the casting sand (2). .

In the case of the plurality of holding bars 120, the outer side of the side frame 110 is protruded to have a function of dissipating heat applied to the side frame 110.

When the cover frame unit 100 according to the present invention is removed from the upper surface of the base frame unit 200, such as an operator, the cover frame unit 100 may be removed by holding the plurality of holding bars 120 by hand. something to do.

In the case of the plurality of gas discharge holes 111, the plurality of gas discharge holes 111 correspond to a plurality of holes formed to pass through the side frame 110.

In the case of the plurality of gas discharge holes 111, the gas generated in the process of cooling the melt injected into the mold may be discharged through the particles constituting the sand 2.

In the case of the gas through pipe 121, the inner through passages are formed in the longitudinal direction of the plurality of holding bars 120, respectively, and the side frames 110 are positioned at the positions where the holding bars 120 are attached to the side frames 110. It is configured to discharge the gas generated from the melt injected into the mold through the through.

In addition, as illustrated in FIGS. 1 and 2, the base frame part 200 may include a pair of side bars 210, a pair of bridge bars 220, and a supporting bar 230.

In the case of the pair of side bars 210, the configuration of the body of the longitudinal direction of the base frame portion 220, a pair of side bars 210 to form the longitudinal side wall of the base frame portion 200 It is a structure which prevents the loss of the lateral direction of the sand 2 for casting.

In the case of the pair of bridge bars 220, one side and the other side of the pair of side bars 210 are connected to each other, and is configured to form a unidirectional body of the base frame portion 200.

In the case of the pair of bridge bars 220, the unidirectional sidewalls of the base frame part 200 are formed to prevent unidirectional loss of the sand 20 for casting.

In the case of the supporting bar 230, as shown in FIG. 1, the pair of side bars 210 and / or protrudes from the bottom of the pair of side bars 210 and / or the pair of bridge bars 220. The bridge bar 220 is spaced apart from the ground to prevent the base frame portion 200 from excessively heating the ground, and the bottom surface of the base frame portion 200 is spaced apart from the ground, so that the base frame portion ( It is a configuration to help the cooling of 200).

In the case of a casting mold system having a gas discharge function according to the present invention, the heating brain portion 300 may further include.

First, in the case of the heating frame part 300, as shown in FIG. 3, the heating frame part 300 is provided in the casting sand 2 and is accommodated in the casting sand 2.

As shown in FIG. 3, in the case of the heating frame part 300, the heating frame part 300 is spaced apart from the outer surface of the mold of the casting product 1, and is similar to the mold of the casting product 1.

In the case of the heating frame portion 300, but having a shape such as a mesh, all of the strands constituting the mesh corresponds to a pipe (tube) or a tube (pipe) in which all the pipes are formed.

If there is an injection tube 130 of Figure 1, the upper portion of the heating frame 300 as shown in Figure 3 will be somewhat modified. That is, of course, the through-path through which the molten water may pass through the injection tube 130 should be formed on the heating frame 300.

Heating frame 300 is made of a configuration such as a tube or tube, such as a number of holes (meaning gas inlet hole 311 of the gas flow tube) is formed in such a tube or tube, Through the opening, gas generated from the melt flows in, and the introduced gas flows to the heating frame part 300 so that the whole of the heating frame part 300 is uniformly distributed in temperature, which is immediately It helps to cool each part evenly.

That is, the heating frame part 300 circulates the heat energy of the gas from the melt in a space spaced from the outside of the mold, and prevents the melt from rapidly cooling only a specific portion, thereby causing the molded product 1 to Ensure that the physical properties and mechanical strength are uniform for each site.

In the case of the heating frame 300 of the casting mold system having a gas discharge function according to the present invention, as shown in Figure 4, it may include a gas flow tube (310).

In the case of the gas flow tube 310, the plurality of gas inlet holes 311 are formed to be spaced apart from the outer surface of the mold and to receive the gas generated from the melt injected into the mold.

The gas flow tube 310 is formed three-dimensionally in complex, such a three-dimensional shape surrounds the mold spaced apart from the outer surface of the mold. Of course, the sand 2 is filled between the gas flow tube 310 and the mold. That is, the mold is also present in the sand 2, and the gas flow tube 310 is also formed in the sand 2 and disposed at appropriate respective positions.

As shown in FIG. 4, the heating frame part 300 may further include a plurality of heating wires 321 and 322.

The heating wires 321 and 322 are formed in contact with the outer circumferential surface of the gas flow tube along the length direction of the gas flow tube 310, and when current flows, heat is generated due to its own electrical resistance. The gas flow tube 310 is heated through the thermal energy according to the electrical resistance, and through this mechanism, ultimately, uniform cooling of the melt in the mold is achieved.

In the case of a casting mold system having a gas discharge function according to the present invention, as shown in FIG. 5, the heating control unit (HCU) unit 400 may be further included.

As shown in FIG. 6, in the case of the HCU unit 400, a plurality of? It is electrically connected to each of the heating wires 321 and 322 to selectively supply current to each of the plurality of heating wires 321 and 322.

In the case of the power supply unit 410, each of the plurality of heating wires 321 and 322 has a function of supplying current to each of the plurality of heating wires.

The address allocator 430 divides each of the heating wires 321 and 322 into positions individually, or is divided into positions of the heating wires 321 and 322 or divided by positions of the heating wires 321 and 322. Is a configuration to assign individual address numbers to small groups.

More specifically, the group of heating wires 321 and 322 disposed on the upper part of the mold has the address ade1243, and the group of heating wires 321 and 322 disposed on the front of the mold has the address ade1543. The group of heating wires 321 and 322 disposed at the address ade1545, the group of heating wires 321 and 322 disposed at the right side of the mold has the address adv1743, and the heating wire (at the left side of the mold) A group of 321 and 322 may be assigned an address of ade1524, and a group of heating wires 321 and 322 disposed under the mold may be addressed of ade5443.

In the case of the selection designator 440, an address number assigned and assigned by the address allocator 430 is selectively designated, so that current is selectively supplied only to the heating wires 321 and 322 corresponding to the selected address number.

For example, if the upper part of the mold is in an environment where subcooling is performed, the current is selectively flowed only to the heating wires 321 and 322 corresponding to the address ade1243. To match.

In the case of the HCU unit 400 of the casting mold system having a gas discharge function according to the present invention may further include a cross-supply unit 420.

In the example as described above, when the region where the subcooling occurs is a plurality of regions, for example, when the right side part of the mold and the left side part of the mold are supercooled, the selection section 440 designates the addresses of adv1743 and ade1524, Then, the cross supply unit 420 flows current while crossing the heating wires 321 and 322 on the right side and the heating wire on the left side corresponding to these adv1743 and ade1524 addresses, so as to adjust the temperature balancing on the left and right sides.

The scope of the present invention is determined by the matters set forth in the claims, and the parentheses used in the claims are not for the purpose of selective limitation, but are used for the definite elements, and the descriptions in the parentheses are also interpreted as essential elements. Should be.

1: Molded product 2: Sand
100: cover frame portion 110: side frame
111: gas discharge hole 120: holding bar
121: gas through tube 130: injection tube
200: base frame portion
210: side bar 211: protrusion bar
220: bridge bar 230: supporting bar
300: heating frame portion 310: gas flow tube
311: gas inflow hole 321: first heating wire
322: second heating wire
400: heat control unit (HCU)
401, 402: wire strand 410: power supply
420: cross-supply unit 430: address assignment unit
440: selection designator

Claims (5)

A base frame portion having an upper surface open to receive the sand for casting through the open upper surface, and forming a lower portion of the mold of the molded product through the sand for casting;
A cover frame part disposed on the base frame part and accommodating sand for casting and forming an upper part of a mold of the molded product; And
It is provided in the sand for casting, disposed to be spaced apart from the outer surface of the mold, to receive the gas generated from the melt flowing into the mold, and to accommodate the gas received in the mold to circulate the outer surface of the mold, Including a heating frame for circulating the heat energy of the melt along the outer surface of the mold,
The cover frame portion,
A side frame which forms a body of the cover frame part and closes a side surface of the casting sand to be received to prevent loss of the casting sand;
A plurality of holding bars protruding from an outer surface of the side frame to allow heat to be applied to the side frame;
A plurality of gas discharge holes formed to penetrate the side frame to discharge gas generated from the melt injected into the mold; And
An inner through path is formed in a length direction of each of the plurality of holding bars, and the holding bar penetrates the side frame at a position attached to the side frame to discharge gas generated from the melt injected into the mold. A gas through tube,
The base frame portion,
A pair of side bars forming a longitudinal body of the base frame portion and forming sidewalls to prevent loss of the casting sand in the lateral direction;
A pair of bridge bars interconnecting one side and the other side of the pair of side bars, forming a unidirectional body of the base frame portion, and forming sidewalls to prevent loss of the casting sand in the lateral direction; And
A support bar protruding from the lower side of the pair of side bars or the pair of bridge bars to separate the pair of side bars and the pair of bridge bars from the ground,
The heating frame portion,
And a gas flow tube disposed to be spaced apart from an outer surface of the mold, the gas flow tube having a plurality of gas inlet holes for receiving a gas generated from the melt injected into the mold. .
delete delete The method of claim 1, wherein the heating frame portion,
And a plurality of heating wires formed in contact with an outer circumferential surface of the gas flow tube along a length direction of the gas flow tube, and generating heat when a current is flowed to heat the gas flow tube. , Casting mold system having a gas discharge function.
The system of claim 4, wherein the system is
Is electrically connected to each of the plurality of heating wires, further comprising a heating control unit (HCU) unit for selectively supplying current to each of the plurality of heating wires,
The HCU unit,
A power supply unit connected to each of the heating wires to supply a current to each of the heating wires;
An address allocator configured to assign an individual address number to each of the plurality of heating wires surrounding the mold; And
And a selection designation section for selectively designating the address number given by the address assignment section to selectively supply current only to the heating wire corresponding to the selected address number. .

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