WO2023239214A1

WO2023239214A1 - Casting apparatus having thermal expansion buffering structure

Info

Publication number: WO2023239214A1
Application number: PCT/KR2023/007978
Authority: WO
Inventors: 백송기; 문준혁; 하무정
Original assignee: 대명산업기술(주)
Priority date: 2022-06-09
Filing date: 2023-06-09
Publication date: 2023-12-14
Also published as: KR102456027B1

Abstract

A casting apparatus having a thermal expansion buffering structure according to one embodiment of the present invention is characterized by comprising: a frame; at least one rod connected to the frame; a holding furnace which is disposed at the bottom of the frame and provided to accommodate molten metal; a base portion including a die base, which rests on the upper part of the holding furnace, and a slide base, which is provided to move up and down on the upper part of the die base; a mold portion coupled to the base portion; and a coupling portion which fixes or unfixes the position of the base portion on the basis of hydraulic pressure applied from the outside and couples the rod and the base portion to each other when the hydraulic pressure is applied.

Description

Casting device with thermal expansion buffering structure

The present invention relates to a casting device, and more specifically, to a thermal expansion buffer that prevents malfunctions that may occur due to thermal expansion of the base due to heat held by the molten metal when a predetermined amount of molten metal is filled in a mold coupled to a base. It relates to a casting device having a structure.

The structure of a conventional low pressure casting device (Low pressure casting M/C) includes a thermal insulation furnace for maintaining the molten metal at a constant predetermined temperature, a lower mold base for mounting the lower mold on the thermal insulation furnace, and a device for supporting the casting device. It consists of a rod, an upper mold base on which the upper mold is mounted and performs the opening and closing operation of the mold, and a hydraulic cylinder device for opening and closing the upper mold base.

At this time, the operation of the casting device is to lower the upper mold and merge it with the lower mold, and then inject air from the air valve installed into the insulating furnace, so that the pressure inside the insulating furnace is higher than atmospheric pressure and the molten metal flows into the mold along the molten metal guide rod. comes in.

Afterwards, when the molten metal introduced into the mold solidifies, the upper mold is separated from the lower mold and rises again to take out the molded product attached to the upper mold.

Due to the nature of such a low-pressure casting device, a casting mold is mounted on the upper part of the insulating furnace, so that the high temperature of the insulating furnace and the temperature of the mold are transmitted to the base on which the above-mentioned mold is mounted. Due to the thermal expansion that occurs at this time, the gap between the rods increases. A problem occurred in which the mold could not move up and down smoothly due to the opening.

In order to solve this problem, a technology has been proposed to prevent deformation of the rod by installing a guide housing that forms a space of a predetermined area between the rod and the base. However, thermal expansion of the upper mold base as it moves up and down has been proposed. Problems caused by possible constriction between the upper mold base and the rod still exist.

The present invention was created to solve the above-mentioned problems, and more specifically, a thermal expansion buffer structure that can prevent malfunction of the base in raising and lowering caused by narrowing between the rod and the base resulting from thermal expansion of the base. The purpose is to provide a casting device having a.

A casting device having a thermal expansion buffering structure according to an embodiment of the present invention includes a frame; At least one rod connected to the frame; A thermal insulation furnace disposed at the bottom of the frame to accommodate molten metal; A base portion including a die base mounted on the upper part of the thermal furnace and a slide base provided to move up and down on the upper part of the die base; a mold portion coupled to the base portion; And a coupling part that fixes or unfixes the position of the base part based on hydraulic pressure applied from the outside and couples the rod and the base part to each other when the hydraulic pressure is applied.

More specifically, the coupling portion is provided to be raised and lowered while coupled to the rod, and is fastened to the base portion.

More specifically, the coupling part is fastened to the rod so that it can be raised and lowered along the rod, and a chamber of a predetermined volume is formed inside so that hydraulic pressure can be applied from the outside, and whether hydraulic pressure supplied into the chamber is supplied or not. Accordingly, it is characterized in that it includes; an elevating member provided to determine the fixed state on the rod.

More specifically, the base portion includes a fastener formed on a side end of at least one base selected from the die base and the slide base; and a center spool coupled to an end of the fastener with a free end spaced apart from the rod by a predetermined distance, wherein the coupling portion couples the fastener and the lifting body to each other, and the fastener moves inward. It is provided to be partially inserted and coupled, and at least one fastening block is formed with a contact prevention step to prevent the fastener and the rod from contacting each other.

More specifically, at least one fastening block is provided, and is coupled to the fastener in a shape-fitting manner, and a block-side buffer space of a predetermined area is formed between the fastener and the fastening block.

More specifically, the center spool is coupled to at least one base selected from the die base and the slide base, and when the base is expanded by heat, the free end is moved toward the rod to the extent that the base is expanded. Even if it is moved, the end of the center spool is provided so that it does not contact the rod.

More specifically, the center spool is characterized in that a rod-side buffer space is formed at a predetermined distance from the free end of the center spool disposed in the chamber to the rod.

More specifically, the fastener includes a fastening groove extending in a direction in which the base constituting the base portion is thermally expanded, and the fastening block is provided to be seated on the fastening groove, and the contact prevention step. Characterized in that it includes at least one fastening step extending to the forming zone.

More specifically, the casting device is characterized in that the separation distance between the fastener and the contact prevention step is formed to be longer than or equal to the separation distance between the center spool and the rod.

More specifically, the lifting body includes: a lifting body; a chamber formed with a predetermined volume inside the lifting body; a hydraulic supply port provided so that a free end of the center spool is disposed within the chamber and configured to apply hydraulic pressure; and a center spool coupler formed on the lifting body to insert the center spool.

A casting device with a thermal expansion buffering structure according to an embodiment of the present invention operates the coupling part based on hydraulic pressure, thereby determining the position of the base part, so that mechanical deformation of the rod can be minimized even when the base part thermally expands. This allows for more stable operation.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention can minimize the phenomenon of the base unit interfering with the rod even if thermal expansion of the base constituting the base unit progresses through the center spool and fastening block. Accordingly, malfunction of the lifting body that may occur due to the interference can be prevented.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention forms a buffer space to prevent interference between the coupling portion and the rod that may occur when the fastener and the fastening block thermally expand in a confined state. You can.

In addition, a casting device having a thermal expansion buffering structure according to an embodiment of the present invention prevents the center spool formed at the side end of the base from contacting the rod even if the base is moved as much as it is expanded toward the lifting body fixed by hydraulic pressure. By doing so, it is possible to prevent constriction between the base and the rod and provide the effect of stable ascending and descending.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention prevents direct contact between the center spool and the rod through the formation of a buffer space on the rod side, thereby eliminating the possibility of constriction between the center spool and the rod. It is possible to prevent malfunctions in the raising and lowering of the lifting body.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention has a fastening block engaged with a fastening groove extending in the direction in which the base is thermally expanded, thereby deforming the coupling structure formed between the fastener and the fastening block. can be minimized.

In addition, the casting device having a thermal expansion buffer structure according to an embodiment of the present invention is formed so that the separation distance between the fastener and the contact prevention step is longer than or equal to the separation distance between the center spool and the rod, thereby forming the base. Even if the fastener is excessively expanded due to thermal expansion of the part, the center spool can be prevented from being constricted with the rod, providing the effect of stably driving the lifting body.

In addition, the casting device having a thermal expansion buffer structure according to an embodiment of the present invention uses an elevating body that is fixed or released according to the filling or discharge of fluid, so that even if the base part is thermally expanded in a fixed state, the center spool is maintained within a predetermined range. Since it can be moved within, it is possible to provide the effect of correcting the deformation of the base portion due to thermal expansion.

Figure 1 is a perspective view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention.

Figure 2 is a front view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention from the front.

Figure 3 is a perspective view showing a state in which the base portion and the coupling portion constituting the casting device having a thermal expansion buffering structure according to an embodiment of the present invention are combined.

Figure 4 is a perspective view showing a state in which a base part constituting a casting device having a thermal expansion buffering structure according to an embodiment of the present invention and one coupling part selected from a plurality of coupling parts are separated.

Figure 5 is an enlarged view of area A of Figure 2 in a state before thermal expansion of the base portion constituting the casting device having a thermal expansion buffering structure according to an embodiment of the present invention.

FIG. 6 is an enlarged view of area A of FIG. 2 in which the base portion constituting the casting device having a thermal expansion buffering structure according to an embodiment of the present invention is in a thermally expanded state.

Figure 7 is a side view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention.

Figure 8 is an enlarged view showing area B of Figure 7.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide a general understanding of the technical field to which the present invention pertains. It is provided to fully inform those with knowledge of the scope of the invention, and the present invention is only defined by the scope of the claims.

Additionally, the terms used in this specification are for describing embodiments and are not intended to limit the present invention.

As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” does not exclude the presence or addition of elements other than the mentioned elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains.

First, with reference to FIGS. 1 and 2 , a casting device having a thermal expansion buffering structure according to an embodiment of the present invention will be described in more detail.

Figure 1 is a perspective view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention, and Figure 2 is a front view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention from the front.

As shown in Figures 1 and 2, the casting device according to an embodiment of the present invention includes a frame 100, a rod 200, a warming furnace 300, a base part 400, a mold part 500, and It is characterized by including a coupling portion 600.

First, the frame 100 is provided to collect the above-described components and is provided so that the components can be combined.

Next, the rod 200 is provided to guide the raising and lowering of the base portion 400 and is disposed in a direction extending upward.

In addition, the rods 200 are coupled to the frame 100 to maintain a predetermined distance apart from each other. More specifically, at least one rod is coupled to a side end of the frame, and preferably a plurality of rods are connected. It is coupled to the side end of the frame 100.

Next, the thermal insulation furnace 300 is provided to accommodate a predetermined amount of molten metal and is disposed at the bottom of the frame.

At this time, the molten metal contained in the thermal insulation furnace 300 is moved toward the inside of the mold unit 500 when the casting device is operated.

Additionally, the base portion 400 is provided to move the mold constituting the mold portion 500, and is formed so that molds having various shapes can be attached and detached.

At this time, the base portion 400 may include a base 410 composed of at least one selected from the die base 410a and the slide base 410b.

In particular, the die base 410a is disposed at the upper part of the thermal insulation furnace 300, and the slide base 410b is provided to be raised and lowered at the upper part of the die base 410a.

Additionally, the mold unit 500 is provided to include at least one mold, and may include a lower mold 510 and an upper mold 520.

At this time, the lower mold 510 is detachably coupled to the upper surface of the die base 410a, and the upper mold 520 is detachably coupled to the lower surface of the slide base 410b.

Next, before proceeding with the description of the coupling portion 600, briefly explaining the casting process that proceeds through the casting device, the slide base 410b descends toward the die base 410a. And, the lower mold 510 and the upper mold 520 are joined to each other.

Thereafter, when the molds are combined with each other, the molten metal accommodated in the thermal insulation furnace 300 is filled into the internal space between the lower mold 510 and the upper mold 520.

At this time, heat transfer proceeds toward the base portion 400, and the base portion 400, to which high heat is applied, undergoes thermal expansion in a predetermined direction due to the heat.

Here, the coupling portion 600 is provided to cushion the thermal expansion of the base portion 400 and maintain a buffering structure to prevent deformation of the rod due to thermal expansion of the base portion.

More specifically, the coupling portion 600 fixes or unfixes the position of the base portion 400 based on hydraulic pressure applied from the outside, and when the hydraulic pressure is applied, the rod 200 and the base portion ( 400) are provided to connect them to each other.

In particular, when the coupling part 600 is operated, the coupling part 600 is operated based on hydraulic pressure, and through this, the position of the base part 400 can be determined, thereby reducing the heat of the base part 400. Even during expansion, mechanical deformation of the rod can be minimized, allowing more stable operation.

In addition, the coupling portion 600 is provided to be raised and lowered while coupled to the rod 200 to space the die base 410a and the slide base 410b, which constitute the base portion, apart from or close to each other. It can be moved.

Next, with reference to FIGS. 3 and 4 , the coupling structure of the base portion and the coupling portion constituting the casting device having a thermal expansion buffering structure according to an embodiment of the present invention will be described in more detail.

Figure 3 is a perspective view showing a combined state of the base portion and the coupling portion constituting the casting device having a thermal expansion buffering structure according to an embodiment of the present invention, and Figure 4 is a thermal expansion buffering structure according to an embodiment of the present invention. This is a perspective view showing a state in which the base part constituting the casting device and one selected coupling part among the plurality of coupling parts are separated.

As shown in FIGS. 3 and 4, the base portion includes a base 410, a fastener 420, and a center spool 430.

First, as described above, the base 410 is characterized in that molds including a lower mold and an upper mold having various shapes are detachably coupled to each other.

Here, the base 410 is mainly thermally expanded along the direction parallel to the C-D direction.

In addition, the fastener 420 is formed at a side end of the base 410 to fasten it to the coupling portion.

At this time, the fastener 420 may be formed at a corner of the base 410, and it is preferable that at least one of the fasteners 420 be provided on the base 410.

In particular, a plurality of fasteners 420 may be provided. In this case, the extension direction of the fasteners 420 is such that adjacent fasteners extend in the same direction, and fasteners disposed at corresponding positions They are arranged to extend in opposite directions.

In addition, the fastener 420 may include a fastening groove 421 for fastening with the fastening block 620 of the coupling portion 600, which will be described later.

At this time, at least one fastening groove 421 may be formed to prevent the fastening block 620 from moving in plane, and the cross section may be formed to have a polygonal shape.

Next, the center spool 430 is formed to extend from the fastener end of the base 410 as a means to secure the above-described buffer structure.

At this time, the free end of the center spool 430 is characterized in that it extends toward the thermal expansion direction of the base 410.

In addition, the coupling portion 600 is provided to include an elevating body 610 and a fastening block 620, and a plurality of fastening blocks 620 are coupled to the upper and lower ends of the elevating body 610, respectively. It can be.

At this time, the fastening block 620 may be coupled through the fastening flange 615 constituting the lifting body 610.

As described above, through the fastening block 620 provided to be divided from the base, the amount of heat conduction applied to the base toward the rod can be reduced, thereby preventing thermal deformation of the rod in advance. By having a coupling structure in which the base 410 and the coupling part 600 are separated from each other, thermal deformation of the coupling part 600 can be minimized even when thermal deformation of the base 410 progresses, resulting in more stable operation. This becomes possible.

Next, with reference to FIGS. 5 and 6, the thermal expansion buffering structure of the casting device of the present invention will be described in more detail.

Figure 5 is an enlarged view of area A of Figure 2 in a state before thermal expansion of the base portion constituting the casting device having a thermal expansion buffer structure according to an embodiment of the present invention, and Figure 6 is an enlarged view of an embodiment of the present invention. This is an enlarged view of area A of FIG. 2 in which the base portion constituting the casting device having the thermal expansion buffering structure according to the example is in a thermally expanded state.

As shown in FIGS. 5 and 6, the base portion 400 includes a base (not shown), a fastener 420, and a center spool 430.

First, the base (not shown) includes at least one selected from the die base (not shown) and the slide base 410b, and, as described above, includes a lower mold and an upper mold having various shapes. The mold is characterized in that it is coupled so as to be detachable.

In addition, the fastener 420 is formed at the side end of the slide base 410b to fasten it to the coupling portion.

At this time, the fastener 420 may be formed at a corner of the slide base 410b, and it is desirable for at least one of the fasteners 420 to be provided on the slide base 410b.

Here, of course, the fastener 420 can be formed not only on the slide base 410b but also on the above-described die base (not shown).

In addition, the fastener 420 may include a fastening groove 421 for fastening with a fastening block 620, which will be described later.

Next, the center spool 430 is coupled to the end of the fastener and extends from the end of the fastener of at least one base selected from the die base and the slide base 410b.

At this time, the center spool 430 is coupled to the lifting body 610 of the lifting body 610, which constitutes a coupling part to be described later. More specifically, the free end of the center spool 430 is connected to the lifting body ( 610) It is coupled to be partially inserted toward the inside.

At this time, the free end of the center spool 430 is provided to be spaced apart from the rod 200 by a predetermined distance.

In particular, when the slide base 410b of the center spool 430 is expanded by heat, the free end of the center spool 430 moves toward the rod 200 as much as the slide base 410b is expanded. Even so, the end of the center spool 430 is provided so as not to contact the rod 200.

Likewise, of course, the center spool 430 can be formed not only on the slide base 410b but also on the above-described die base (not shown).

As described above, the center spool formed at the side end of the base is directed toward the lifting body fixed by hydraulic pressure and does not contact the rod even if the base is moved as much as it is expanded, thereby preventing constriction between the base and the rod to ensure stable elevation. You can proceed with the descent.

Next, the coupling portion 600 may include an elevating body 610 and a fastening block 620.

First, the lifting body 610 is fastened to the rod 200 so that it can be raised and lowered along the rod 200, and its position on the rod 200 can be determined by hydraulic pressure flowing in from the outside.

In particular, the lifting body 610 has a chamber 612 of a predetermined volume formed inside so that hydraulic pressure can be applied from the outside, and is fixed on the rod depending on whether hydraulic pressure is supplied into the chamber 612. The state is determined.

More specifically, the lifting body 610 may include a lifting body 611, a chamber 612, a hydraulic supply port 613, and a center spool coupler 614.

Here, the lifting body 611 is formed to surround the above-described rod, and is provided to be raised and lowered while fastened to the rod.

In addition, the chamber 612 is formed with a predetermined volume inside the lifting body so that the lifting body 611 can be fixed to the rod 200 when a predetermined amount of fluid is filled to have a predetermined pressure. is formed

In addition, the hydraulic supply port 613 is provided so that the free end of the center spool 430 is disposed in the chamber 612, and is formed to apply hydraulic pressure, and is required to raise and lower the lifting body 611. Of course, in this case, a predetermined amount of fluid can be discharged through the hydraulic supply port 613.

In addition, the center spool coupler 614 is formed so that the center spool 430 can be partially inserted so that the free end of the center spool 430 can be placed in the chamber 612, and the It is formed to penetrate one side of the body 611.

At this time, the center spool 430 may be provided so that a rod-side buffer space (SR) is formed at a predetermined distance from the free end of the center spool disposed in the chamber to the rod.

As described above, direct contact between the center spool 430 and the rod 200 is prevented through the formation of the rod side buffer space (SR), thereby reducing the gap between the center spool 430 and the rod 200. It is possible to prevent a malfunction in the elevation or lowering of the elevating body 610 that may occur due to stenosis.

Next, the fastening block 620 is provided to couple the fastener 420 and the lifting body 610 to each other.

More specifically, the fastening block 620 is provided so that the fastener 420 is partially inserted and coupled to the inside of the fastening block.

And, as shown in FIG. 5, in the casting device, the separation distance L1 between the fastener 420 and the contact prevention step 621 is such that the center spool 430 and the rod 200 It may be formed to be longer or equal to the separation distance (L2) between them.

That is, by forming the separation distance (L1) between the fastener 420 and the contact prevention step 621 to be longer than or equal to the separation distance (L2) between the center spool 430 and the rod 200. Even if the fastener 420 is excessively expanded due to thermal expansion of the slide base 410b constituting the base portion, the center spool 430 can be prevented from being constricted with the rod 200, providing a stable lifting body. The operation can proceed.

Additionally, in order to prevent the fastener 420 from being separated in the vertical direction, at least one of the fasteners 420 may be provided so that it can be coupled to one or more positions selected from the top and bottom of the fastener 420.

In addition, the fastening block 620 is coupled to the fastener 420 in a shape-fitting coupling method, so that even when the fastener 420 thermally expands, the fastener 420 and the fastening block 620 Damage to the bonding area can be minimized.

In particular, the fastening block 620 may include a fastening step 621 and a contact prevention step 622.

Here, the fastening step 621 is formed to perform shape-fitting coupling with the fastener 420 described above, and the fastening groove 421 whose cross-sectional shape in the vertical direction is formed in the fastener 420 It is formed to have a cross-sectional shape corresponding to the vertical cross-sectional shape of.

At this time, the fastening step 621 is provided to be seated on the fastening groove 421 of the fastener 420, and is characterized in that it extends to the area where the contact prevention step 622 is formed.

In addition, the contact prevention step 622 is formed to prevent the fastener 420 and the rod from contacting each other, and is provided to protrude by a predetermined thickness on the inside of the fastening block.

In addition, a block-side buffer space (SB) of a predetermined area may be formed between the fastener 420 and the fastener block 620, and through formation of the block-side buffer space (SB), the fastener 420 ) and the fastening block 620 can prevent interference between the coupling portion 600 and the rod 200 that may occur due to thermal expansion in a confined state.

Next, with reference to FIGS. 7 and 8, the coupling structure between the base portion and the coupling portion will be described in detail.

Figure 7 is a side view showing a casting device having a thermal expansion buffering structure according to an embodiment of the present invention, and Figure 8 is an enlarged view showing area B of Figure 7.

First, as shown in FIG. 7, the fastener 420 may include a fastening groove 421.

At this time, the fastening groove 421 may be formed to extend in the direction in which the base constituting the base portion is thermally expanded.

In particular, at least one fastening groove 421 may be formed to prevent the fastening block 620 from moving in plane, and its cross section may be formed to have a polygonal shape.

In addition, although not specifically shown in the drawings, the vertical cross-sectional shape of the fastening groove 421 has a dovetail shape, so that the fastening groove 421 can prevent the fastening block 620 from moving up and down. It can be provided.

At this time, the fastening step 622 of the fastening block 620 is formed to have a cross-sectional shape in the vertical direction that corresponds to the vertical cross-sectional shape of the fastening groove 421.

Likewise, when the vertical cross-sectional shape of the fastening groove 421 is provided to have a dovetail shape, the cross-section of the fastening step has a dovetail shape to prevent the fastening block 620 from moving up and down. Of course, it can be provided.

As described above, the casting device according to an embodiment of the present invention operates the coupling part based on hydraulic pressure, and through this, the position of the base part can be determined, so that mechanical deformation of the rod can be minimized even when the base part thermally expands. This allows for more stable operation.

In addition, through the center spool formed in the base portion and the coupling portion connecting the base portion and the rod, even if thermal expansion of the base constituting the base portion progresses, the phenomenon of the coupling portion interfering with the rod can be minimized. It is possible to prevent malfunction of the elevator body that may occur due to interference.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only for illustrating the invention, and those skilled in the art may make various modifications or equivalents from the detailed description of the invention. It will be appreciated that one embodiment is possible.

Therefore, the true scope of rights of the present invention must be determined by the technical spirit of the patent claims.

More specifically, the coupling part is provided to be raised and lowered while coupled to the rod, and is fastened to the base part as a form for carrying out the invention.

More specifically, the coupling part is fastened to the rod so that it can be raised and lowered along the rod, and a chamber of a predetermined volume is formed inside so that hydraulic pressure can be applied from the outside, and whether hydraulic pressure supplied into the chamber is supplied or not. Accordingly, an elevating member provided to determine the fixed state on the rod; is included as a form for carrying out the invention.

More specifically, the base portion includes a fastener formed on a side end of at least one base selected from the die base and the slide base; and a center spool coupled to an end of the fastener with a free end spaced apart from the rod by a predetermined distance, wherein the coupling portion couples the fastener and the lifting body to each other, and the fastener moves inward. An embodiment of the present invention includes at least one fastening block that is partially inserted and coupled, and has a contact prevention step to prevent the fastener and the rod from contacting each other.

More specifically, at least one fastening block is provided, and is coupled to the fastener in a shape-fitting coupling method, and a block-side buffer space of a predetermined area is formed between the fastener and the fastening block. Do it in the form.

More specifically, the center spool is coupled to at least one base selected from the die base and the slide base, and when the base is expanded by heat, the free end is moved toward the rod to the extent that the base is expanded. A form for carrying out the invention is that the end of the center spool is provided so that it does not contact the rod even if it is moved.

More specifically, the center spool is provided to form a rod-side buffer space spaced a predetermined distance from the free end of the center spool disposed in the chamber to the rod.

More specifically, the fastener includes a fastening groove extending in a direction in which the base constituting the base portion is thermally expanded, and the fastening block is provided to be seated on the fastening groove, and the contact prevention step. A form for carrying out the invention includes at least one fastening step extending to the forming zone.

More specifically, the casting device is formed so that the separation distance between the fastener and the contact prevention step is longer than or equal to the separation distance between the center spool and the rod.

A casting device with a thermal expansion buffering structure according to an embodiment of the present invention operates the coupling part based on hydraulic pressure, thereby determining the position of the base part, so that mechanical deformation of the rod can be minimized even when the base part thermally expands. It is expected that it will be widely used in the industry as it allows for more stable operation.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention can minimize the phenomenon of the base unit interfering with the rod even if thermal expansion of the base constituting the base unit progresses through the center spool and fastening block. Accordingly, it is expected to be widely used in industry in that it can prevent malfunction of the lifting body that may occur due to the interference.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention forms a buffer space to prevent interference between the coupling portion and the rod that may occur when the fastener and the fastening block thermally expand in a confined state. It is expected that it will be widely used industrially.

In addition, a casting device having a thermal expansion buffering structure according to an embodiment of the present invention prevents the center spool formed at the side end of the base from contacting the rod even if the base is moved as much as it is expanded toward the lifting body fixed by hydraulic pressure. It is expected to be widely used in the industry in that it has the effect of preventing constriction between the base and the rod and enabling stable elevation and descent.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention prevents direct contact between the center spool and the rod through the formation of a buffer space on the rod side, thereby eliminating the possibility of constriction between the center spool and the rod. It is expected to be widely used in industry as it can prevent malfunctions in the raising and lowering of the lifting body.

In addition, the casting device having a thermal expansion buffering structure according to an embodiment of the present invention has a fastening block engaged with a fastening groove extending in the direction in which the base is thermally expanded, thereby deforming the coupling structure formed between the fastener and the fastening block. It is expected to be widely used in industry as it can minimize .

In addition, the casting device having a thermal expansion buffer structure according to an embodiment of the present invention is formed so that the separation distance between the fastener and the contact prevention step is longer than or equal to the separation distance between the center spool and the rod, thereby forming the base. Even if the fastener is excessively expanded due to thermal expansion of the part, the center spool can be prevented from being constricted with the rod, and it is expected to be widely used in the industry in that it has the effect of stably driving the lifting body.

In addition, the casting device having a thermal expansion buffer structure according to an embodiment of the present invention uses an elevating body that is fixed or released according to the filling or discharge of fluid, so that even if the base part is thermally expanded in a fixed state, the center spool is maintained within a predetermined range. It is expected to be widely used in industry in that it can be moved within the body and has the effect of correcting deformation of the base portion due to thermal expansion.

Claims

frame(100);

At least one rod 200 connected to the frame;

A thermal insulation furnace 300 disposed at the bottom of the frame to accommodate molten metal;

A base portion 400 including a die base 410a mounted on the upper part of the thermal furnace and a slide base 410b provided to move up and down on the upper part of the die base;

A mold portion 500 coupled to the base portion; and

A thermal expansion cushioning structure comprising a coupling portion 600 that fixes or unfixes the position of the base portion based on hydraulic pressure applied from the outside and couples the rod and the base portion to each other when the hydraulic pressure is applied. Casting equipment available.
According to claim 1,

The coupling portion 600 is,

A casting device having a thermal expansion buffer structure, which is provided to be raised and lowered while coupled to the rod and fastened to the base portion.
According to claim 2,

The coupling portion 600 is,

It is fastened to the rod so that it can be raised and lowered along the rod, and a chamber of a predetermined volume is formed inside so that hydraulic pressure can be applied from the outside. Depending on whether or not hydraulic pressure is supplied into the chamber, the fixed state at the rod A casting device having a thermal expansion buffering structure comprising a lifting body 610 provided to determine .
According to claim 3,

The base portion 400 is,

A base 410 including at least one selected from the die base 410a and the slide base 410b;

A fastener 420 formed at a side end of the base 410; and

It includes a center spool 430 coupled to the fastener end and having a free end spaced apart from the rod by a predetermined distance,

The coupling portion 600 is,

At least one fastening block (621) is provided to couple the fastener and the lifting body to each other, and the fastener is partially inserted and coupled to the inside, and a contact prevention step 621 is formed to prevent the fastener and the rod from contacting each other. 620); A casting device having a thermal expansion buffering structure comprising a.
According to claim 4,

The fastening block 620 is,

A casting device having a thermal expansion buffering structure, characterized in that at least one is provided and coupled to the fastener in a shape-fitting manner, and a block-side buffer space (SB) of a predetermined area is formed between the fastener and the fastening block.
According to claim 4,

The center spool 430 is,

When coupled with at least one base selected from the die base and the slide base, when the base is expanded by heat, the end of the center spool is moved toward the rod as much as the base is expanded. A casting device having a thermal expansion buffering structure, characterized in that it is provided so as not to come into contact with.
According to claim 6,

The center spool 430 is,

A casting device having a thermal expansion buffer structure, characterized in that a rod-side buffer space (SR) is formed at a predetermined distance from the free end of the center spool disposed in the chamber to the rod.
According to claim 4,

The fastener 420 is,

It includes a fastening groove 421 extending in the direction in which the base constituting the base portion is thermally expanded,

The fastening block 620 is,

A casting device having a thermal expansion buffering structure, comprising: at least one fastening step (622) provided to be seated on the fastening groove and extending to the anti-contact step formation area.
According to claim 4,

The casting device is,

A casting device having a thermal expansion buffer structure, characterized in that the separation distance (L1) between the fastener and the contact prevention step is formed to be longer than or equal to the separation distance (L2) between the center spool and the rod.
According to claim 4,

The lifting body 610,

Elevating body 611;

A chamber 612 formed with a predetermined volume inside the lifting body;

A hydraulic supply port 613 is provided so that the free end of the center spool is disposed in the chamber and is formed to apply hydraulic pressure; and

A casting device having a thermal expansion buffering structure, comprising a center spool coupler (614) formed on the lifting body to insert the center spool.