KR102510653B1 - Apparatus for supplying molten metal of low pressure casting machine - Google Patents

Abstract

In the molten metal supply device of the differential pressure casting facility, the bottom plate supporting the crucible in which the molten metal is accommodated and the side walls and side walls surrounding the side of the crucible so that the stoke can be performed without separating the stoke from the warming furnace when replacing the molten metal. A molten metal supply device of a differential pressure casting facility having a structure in which a cover is installed on top of and covers the inside, and a stalk extending into the inside of the crucible is installed to be integrally coupled with the holding furnace is provided.

Description

Molten metal supply device of differential pressure casting equipment {APPARATUS FOR SUPPLYING MOLTEN METAL OF LOW PRESSURE CASTING MACHINE}

The present disclosure relates to a molten metal supply device for replacing and supplying molten metal to a differential pressure casting facility.

In recent years, a differential pressure casting apparatus has been widely used in casting aluminum wheels for automobiles, engine cylinder heads, housings, and the like.

The differential pressure casting device includes a holding furnace in which molten molten metal is accommodated, a mold placed on the top of the holding furnace and connected to the holding furnace through a stoke, and a pressure unit that applies pressure to the holding furnace and the mold to fill the molten metal into the mold by differential pressure. can include

Therefore, after applying the same pressure to the holding furnace and the mold, the molten metal is filled into the mold by applying differential pressure so that the pressure inside the mold is relatively low. The turbulence can be minimized as the molten metal rises and fills the inside of the mold by the differential pressure.

When the mold is filled with molten metal, the pressure is maintained for a certain period of time to solidify the molten metal. When solidification is complete, the pressure is removed, the mold is opened, and the casting is separated to complete casting of the product. When the casting is separated, the unsolidified molten metal on the stoke side can be recovered to the holding furnace. When product casting is completed, the height of the molten metal surface of the warming furnace is lowered by the amount of molten metal used, and the pressure can be corrected under a pressurization condition corresponding thereto when casting the next product.

However, in the conventional case, since the stoke is installed on a work table separately from the warming furnace, there is a problem in that the stoke must be raised and separated from the warming furnace in order to replace the molten metal in the warming furnace and supply it with a new molten metal.

The stoke is extended to the bottom of the warming furnace, so in order to completely separate the stoke upward from the warming furnace, the work table on which the stoke is installed must be lifted upwards as long as the stoke length. Accordingly, the vertical movement distance of the work table is increased, and the overall size of the equipment is increased.

In addition, as the stoke is exposed to the outside, the temperature of the stoke is lowered and the molten aluminum buried in the stoke is hardened. However, conventionally, there is a problem in that it is difficult to preheat the stalk while the stalk is mounted on the equipment.

In addition, as the molten metal such as aluminum is oxidized according to the exposure of the stoke, oxides are generated. As the warming furnace is also moved to the facility with the upper part open, the temperature decreases and foreign matter caused by aluminum oxide is generated, which deteriorates the quality of the casting.

An object of the present invention is to provide a molten metal supply device of a differential pressure casting facility capable of performing an operation without separating a stoke from a holding furnace when replacing and supplying molten metal.

An object of the present invention is to provide a molten metal supply device of a differential pressure casting facility capable of preventing a stoke from being exposed to the outside when replacing and supplying molten metal.

An object of the present invention is to provide a molten metal supply device of a differential pressure casting facility capable of reducing the time required for molten metal replacement and supply by minimizing movement of the facility.

An object of the present invention is to provide a molten metal supply device of a differential pressure casting facility capable of preventing the generation of foreign substances during a molten metal replacement supply process.

An object of the present invention is to provide a molten metal supply device of a differential pressure casting facility capable of preventing a drop in temperature of molten metal or a stoke and generation of oxides when replacing and supplying molten metal.

Differential pressure casting equipment of the present embodiment includes a base plate forming the floor, a vertical shaft installed vertically on the base plate, a fixed plate installed on top of the vertical shaft to support the vertical shaft, and installed to be slidable up and down along the vertical shaft. A work table on which a lower mold is installed, a movable plate disposed on the work table and sliding up and down along the vertical shaft, and an upper mold installed on the lower part, installed on the fixed plate and connected to the movable plate to move the movable plate up and down A vertical drive unit, a warming furnace disposed on the base plate and connected to the work table to supply molten metal to the mold, a stalk connecting the warming furnace and the mold to supply molten metal from the warming furnace to the mold, the warming furnace and the It may include a pressure unit for injecting molten metal into the mold by applying differential pressure to the mold.

The differential pressure casting equipment may further include a clamping unit selectively coupling the movable plate and the work table to raise the work table when moving to the warming furnace.

An eject unit installed on the movable plate to separate the casting from the mold may be further included.

A cooling unit for cooling the mold may be further included.

The mold may include a lower mold provided on the workbench and connected to the stalk, and an upper mold located above the lower mold.

The mold may include a side mold disposed on a side surface of the lower mold, and may form a plurality of cavities between the lower mold, the upper mold, and the lower mold.

The vertical actuator may include a vertical cylinder vertically installed on the upper base plate and connected to the movable plate to vertically move a work table connected to the movable plate.

The clamping part includes a vertical plate installed on the movable plate and extending downward, a fixing hook formed at an end of the vertical plate, a pull bar installed on the work table and moved in a horizontal direction to selectively catch the fixing hook, It may include an operating cylinder for horizontally moving the hanging bar.

The pressure unit includes a pressurized gas storage tank for applying gas pressure to the molten metal surface, an injection line for injecting pressurized gas from the storage tank into the mold and the warming furnace, respectively, a pressure regulator installed in each injection line, and the pressure It may include a control unit for controlling the regulator to adjust the internal gas pressure of the mold and the warming furnace.

In the molten metal supply device of the present embodiment, the warming furnace includes a bottom plate supporting a crucible in which molten metal is accommodated, a side wall surrounding a side surface of the crucible, and a cover installed at an upper end of the side wall to cover the inside, and the cover extends into the crucible. The stalk to be installed may be a structure in which the warming furnace and the stalk move together as one body.

A connection pipe may be installed on the workbench to connect the stalk and the mold by being closely attached to an upper end of the stalk.

The molten metal supply device may further include a horizontal driver installed on the base plate and connected to the warming furnace to horizontally move the warming furnace below the worktable.

A hole in which a stalk is installed is formed at the top of the cover, and a step is formed on the inside of the hole to span the flange of the top of the stalk, and the step is coupled to the flange of the top of the stalk to protect the flange. Fastening ring made of a rigid material Is installed, and a pad for sealing is installed between the fastening ring and the step and between the fastening ring and the flange to seal between the hole and the flange of the stalk.

It may further include a sealing material placed on the fastening ring to seal a space between the lower end of the connecting pipe and the connecting pipe.

The cover may be installed at an upper end of the side wall of the warming furnace, and an O-ring may be installed between the upper end of the side wall and the cover to seal the gap between the cover and the upper end of the side wall.

The cover may further include a refractory material installed inside to cover an upper portion of the crucible and block heat of the molten metal.

The horizontal driving part is installed on the base plate and extends to the lower part of the worktable, a transfer rail installed on the warming furnace and rolling along the transfer rail, installed on the base plate and disposed in the direction of movement of the transfer rail, and is installed on the warming furnace. It is connected and may include a driving cylinder for pushing or pulling the warming furnace.

The horizontal driving unit is driven by a transfer rail installed on the base plate and extending to the lower part of the work table, a drive wheel installed on the warming furnace and rolling along the transfer rail, a drive sprocket wheel installed on the base plate and spaced apart from each other along the transfer rail. A sprocket wheel, a chain connected between the drive sprocket wheel and the driven sprocket wheel, a connection bracket connecting between the chain and the warming furnace, and a drive motor connected to the drive sprocket wheel to rotate and drive the drive sprocket wheel. can

As described above, according to the present embodiment, since the stoke is fixedly installed in the holding furnace, there is no need to separate the stoke from the holding furnace in the process of moving the holding furnace to the outside of the device for replacement and supply of molten metal.

Since the stoke is not exposed to the outside from the holding furnace, it is possible to prevent the stoke from being cooled or the molten metal on the stoke from being hardened and oxidized in the process of replacing and supplying molten metal.

Since the warming furnace can be moved while the top of the warming furnace is covered, it is possible to prevent a drop in temperature of the newly supplied molten metal and to prevent oxidation of the molten metal in the warming furnace.

Accordingly, it is possible to prevent deterioration in casting quality due to oxidized foreign substances and the like, and to produce high-quality castings.

In addition, since the operation for separating the stalk from the warming furnace can be omitted, the configuration or process of the device can be further simplified.

In addition, productivity can be increased by shortening the time required for replacing and supplying molten metal to reduce waiting time for operation and casting cycle.

1 is a schematic cross-sectional view showing a differential pressure casting facility having a molten metal supply device according to an embodiment.
2 and 3 are schematic cross-sectional views showing the holding furnace of the molten metal supply device according to the present embodiment.
4 and 5 are schematic diagrams showing the configuration of the horizontal drive unit for moving to the warming furnace of the molten metal supply device according to the present embodiment.
6 is a schematic diagram showing a process of supplying molten metal to a differential pressure casting facility according to the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later. Embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, identical or similar parts are indicated using the same reference numerals in the drawings.

The terminology used below is only for referring to specific embodiments and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of "comprising" specifies specific characteristics, regions, integers, steps, operations, elements, and/or components, and other specific characteristics, regions, integers, steps, operations, elements, elements, and/or groups. does not exclude the presence or addition of

Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only preferred examples of the present invention, but the present invention is not limited to the following examples.

Hereinafter, this embodiment will be described using a differential pressure casting facility as an example. This device can be applied to all casting facilities including low pressure casting facilities as well as differential pressure casting facilities, which have a structure injecting molten metal into a mold through a stoke by applying pressure to a holding furnace.

Hereinafter, this embodiment will be described as an example of an apparatus for casting a casting with molten aluminum. This apparatus can be applied to an apparatus for casting a casting using various metal molten metals, such as magnesium, in addition to aluminum molten metal. Aluminum is a general term for aluminum alloy, and molten aluminum includes a molten material of an aluminum alloy.

1 schematically illustrates a differential pressure casting facility having a molten metal supply device according to the present embodiment, and FIGS. 2 and 3 illustrate a holding furnace of the molten metal supply device according to the present embodiment.

As shown in FIG. 1, the differential pressure casting facility 100 has a base plate 110 forming the floor, a vertical shaft 112 vertically installed on the base plate 110, and a vertical shaft 112 installed on top of the vertical shaft 112. A fixing plate 114 supporting the shaft 112, a work table 120 installed slidably up and down along the vertical shaft 112 and having a lower mold 152 installed thereon, and a vertical shaft disposed on the work table 120 The movable plate 130 that slides up and down along the 112 and the upper mold 154 is installed at the bottom, installed on the fixed plate 114 and connected to the movable plate 130 to move the movable plate 130 up and down The vertical drive unit 140, the eject unit 160 installed on the movable plate 130 to separate the casting from the mold 150, the mold 150 disposed on the base plate 110 and connected to the work table 120 The warming furnace 210 for supplying molten metal to the warming furnace 210, the stalk 220 for supplying the molten metal of the warming furnace 210 to the mold 150 by connecting the warming furnace 210 and the mold 150, and the warming furnace 210 and a pressure unit (not shown) for injecting molten metal into the mold 150 by applying differential pressure to the mold 150 .

The mold 150 is for molding a casting through the inflow of molten metal, and may include a lower mold 152 and an upper mold 154. The mold 150 may further include a side mold. Hereinafter, the mold 150 may refer to all of an upper mold, a lower mold, and a side mold.

The lower die 152 and the upper die 154 or the side die are engaged with each other to form a cavity, which is a space according to the shape of the casting. Molten metal is injected into the cavity and molded into a casting.

The lower mold 152 may be installed on the work table 120 and connected to the warming furnace 210 through the stalk 220 . An injection port into which molten metal is injected may be formed at one side of the lower mold 152 .

A connection pipe 170 serving as a supply channel for molten metal by connecting the inlet and the stalk 220 may be further installed in the work table 120 . Accordingly, the molten metal may be supplied into the mold 150 through the stalk 220 and the connection pipe 170 .

When the side mold is provided, a horizontal cylinder (not shown) may be further provided on the side of the work table to move the side mold and the side mold in a horizontal direction. The side mold is disposed on the side of the lower mold, and may be divided into a plurality of pieces along the circumference of the lower mold. Since the side die is connected to the horizontal cylinder, it moves in a horizontal direction according to the driving of the horizontal cylinder and can be engaged with the side surface between the upper and lower molds.

The upper mold 154 may be installed under the movable plate 130 . The movable plate 130 is moved up and down by the vertical driving unit 140 . As the movable plate 130 moves up and down, the upper mold 154 installed on the movable plate 130 is engaged with or separated from the lower mold 152 .

In the mold 150, a gas supply means of an inert gas into the cavity, a suction and discharge means of air, and an oxygen sensor may be further installed. Accordingly, when pressurized supply of molten metal, an inert gas is supplied into the cavity, and air in the cavity is sucked and discharged at the same time, thereby quickly replacing the inside of the cavity with an inert gas atmosphere.

The vertical actuator 140 may include a vertical cylinder 142 installed on the fixed plate 114 and connected to the movable plate 130 to move the movable plate 130 up and down with respect to the fixed plate 114 . A movable plate 130 may be installed at the front end of the piston rod of the vertical cylinder 142 . Thus, when the vertical cylinder 142 is stretched and driven, the movable plate 130 moves up and down, and the upper mold 154 installed on the movable plate 130 may be engaged with or spaced apart from the lower mold 152 .

The differential pressure casting facility 100 may further include a cooling unit for cooling the mold 150 . The cooling unit may be, for example, a water-cooling structure for cooling by supplying cooling water, an air-cooling structure for cooling by supplying cooling air, or a combination thereof.

In addition, a clamping part 180 for coupling or separating the movable plate 130 and the work table 120 may be further included so that the work table 120 can be raised when the warming furnace 210 is replaced.

The clamping unit 180 is installed on the movable plate 130 and extends downward, the vertical plate 182, the fixing hook 184 formed at the tip of the vertical plate 182, and the work table 120 installed in the horizontal direction. It may include an operating cylinder 186 for horizontally moving the pull bar to be moved and selectively caught on the fixing hook 184.

The hanging bar may be installed on the work table 120 according to the position of the fixing hook in a state in which the movable plate 130 is moved toward the work table 120 . Accordingly, when the actuation cylinder 186 is driven in a state in which the movable plate 130 is lowered to the work table 120, the hanging bar coupled to the actuation cylinder is moved and caught on the fixing hook 184.

As the hanging bar is caught on the fixing hook 184, the work table 120 is coupled to the movable plate 130. Therefore, when the movable plate 130 moves upward according to the operation of the vertical driving unit 140, the work table 120 coupled to the movable plate 130 moves upward like the movable plate 130.

As the work table 120 moves upward, the warming furnace 210 and the work table 120 are spaced apart and separated. Accordingly, the warming furnace 210 can be moved outward without interfering with the work table 120 . Therefore, it is possible to replace and supply molten metal by moving the warming furnace 210 . The structure for replacing and supplying molten metal will be described in detail later.

The pressure unit applies differential pressure between the warming furnace 210 and the inside of the mold 150 to inject molten metal into the mold.

For example, the pressure unit is a pressurized gas storage tank for applying gas pressure to the inside of the furnace 210 and the inside of the mold 150, and injection for injecting the pressurized gas in the storage tank into the inside of the furnace 210 and the mold 150 It may include a pressure regulator installed in the line, each injection line, and a control unit controlling the gas pressure of each line by controlling the pressure regulator.

Accordingly, the pressure regulator generates a differential pressure between the warming furnace 210 and the mold 150 through the injection line according to a signal from the control unit. The molten metal is raised along the stalk 220 by the differential pressure and injected into the cavity of the mold 150 .

When the filling of the molten metal into the cavity is completed, the molten metal in the cavity is solidified while maintaining a constant pressing force in the warming furnace 210 . When the solidification of the molten metal in the cavity is completed, the pressure applied in the holding furnace 210 is lowered to a set value. At this time, the molten metal remaining in the stoke 220 may be returned to the warming furnace 210 . Then, by opening the mold 150 and discharging the solidified casting from the mold 150, one process can be completed.

When the molten metal accommodated in the crucible 230 of the holding furnace 210 is exhausted while the casting cycle is repeated, new molten metal is supplied to the casting facility 100 through the molten metal supply device 200 .

To replace and supply molten metal, the warming furnace 210 is moved from the lower part of the work table 120 to the outside. When new molten metal is filled in the crucible 230 , the warming furnace 210 is moved to the lower part of the work table 120 of the casting facility 100 again to supply molten metal to the mold 150 .

The molten metal supply device 200 of the present embodiment has a structure in which the cover 240 in which the stalk 220 is installed is coupled to the warming furnace 210 so that the stalk 220 and the warming furnace 210 form one body.

Therefore, during the molten metal replacement operation, the replacement operation can be performed by moving the mounted state of the stalk 220 without removing it from the warming furnace 210 . Therefore, it is possible to solve problems caused by the stalk 220 being exposed to the outside of the warming furnace 210 .

To this end, the warming furnace 210 of this embodiment includes a bottom plate 212 supporting the crucible 230, a side wall 214 surrounding the side of the crucible 230, and a cover installed on the top of the side wall 214 to cover the inside. (240). Further, a stalk 220 extending into the crucible 230 may be installed in the cover 240 and integrally coupled with the warming furnace 210 .

In addition, a connection pipe 170 may be installed on the work table 120 to connect the stalk 220 and the mold 150 by being closely attached to the upper end of the stalk 220 .

The connection pipe 170 is a pipe structure installed on the workbench 120 . The connection pipe 170 may be formed to have a length corresponding to the vertical thickness of the work table 120 and be installed through the work table 120 . The upper end of the connection pipe 170 is connected to the inlet of the lower mold 152 installed on the work table 120 . The lower end of the connection pipe 170 is connected to the stalk 220 coupled to the cover 240 of the warming furnace 210 as one body. The molten metal accommodated in the crucible 230 of the holding furnace 210 is injected into the mold 150 through the stalk 220 and the connecting pipe 170 .

As the stalk 220 is installed on the cover 240 and forms one body with the warming furnace 210, it is separated from the work table 120 of the casting facility 100 and can move like the warming furnace 210. Therefore, in the process of moving the warming furnace 210 to replace and supply molten metal, there is no need to lift the stalk 220 from the warming furnace 210 and separate it.

The crucible 230 is a container structure for accommodating molten metal and is provided in the warming furnace 210 .

The warming furnace 210 forms an internal space by the bottom plate 212 and the side wall 214 and forms a container shape with an open top. A crucible 230 is installed on the inner floor of the warming furnace 210 . The warming furnace 210 surrounds and protects the outside of the crucible 230 and keeps the molten metal contained in the crucible 230 warm so that it does not solidify. The warming furnace 210 may have a cylindrical shape. The shape and size of the warming furnace 210 may be variously modified according to the crucible 230 .

The outer surface of the warming furnace 210 is made of a shell 216, and an insulating material 218 for keeping warm may be installed inside the shell.

The cover 240 in which the stalk 220 is installed is coupled to the open top of the warming furnace 210 . The cover 240 may be detachably installed on the warming furnace 210 . A ring 241 to which a hook for moving the cover 240 is coupled may be installed at an upper end of the cover 240 . Accordingly, the cover 240 on which the stalk 220 is mounted can be easily moved by hooking the hook of the overhead crane to the hook 241 . Therefore, when replacing molten metal, the cover 240 may be moved to open the top of the warming furnace 210 or moved to the top of the warming furnace 210 to cover the warming furnace 210 .

The cover 240 is closely coupled to the upper end of the warming furnace 210 to block the inside of the warming furnace 210 from the outside. An O-ring 250 may be installed between the upper end of the side wall 214 of the furnace 210 and the cover 240 to seal the gap between the cover 240 and the upper end of the side wall 214 . As the warming furnace 210 presses and adheres to the work table 120, the O-ring 250 between the cover 240 and the upper end of the side wall 214 of the warming furnace 210 is pressed to seal between the two members.

The cover 240 may be made of, for example, iron. A refractory material 242 covering an upper portion of the crucible 230 may be further installed at the inner center of the cover 240 . Heat of the molten metal accommodated in the crucible 230 is blocked by the refractory material 242 and conduction to the cover 240 can be minimized. Accordingly, the temperature of the cover 240 can be lowered by minimizing the influence of the molten metal.

The stalk 220 is installed on the cover 240 and extends vertically. The upper end of the stalk 220 is installed on the cover 240 and the lower end penetrates the cover 240 and is inserted into the crucible 230 . The lower end of the stalk 220 is formed long to be submerged in the molten metal of the crucible 230 and extends toward the bottom of the crucible 230 .

As shown in FIG. 3, a hole 244 in which a stalk 220 is installed is formed at the top of the cover 240, and a flange 222 at the top of the stalk 220 spans the inside of the hole 244. A step 246 may be formed.

A fastening ring 260 made of a rigid material for protecting the flange 222 is installed on the flange 222 at the top of the stalk 220. The fastening ring 260 is made of, for example, an iron material and protects the flange 222 of the weak stalk 220 by surrounding it.

The fastening ring 260 is a ring-shaped structure and is separated vertically to form a pair. A pair of fastening rings 260 are disposed vertically with the flange 222 interposed therebetween, and have a structure that surrounds the flange 222 vertically. A pair of fastening rings 260 may be coupled to each other by bolts to surround the flange 222 .

The fastening ring 260 coupled to the flange 222 of the stalk 220 is fixedly installed on the step 246. For example, the fastening ring 260 may be fixed to the cover 240 by being inserted into the step 246 and fastened by bolts.

In this way, the stalk 220 may be fixedly installed to the cover 240 via the stepped 246 and the fastening ring 260.

In addition, pads 252 and 254 for sealing are installed between the fastening ring 260 and the step 246 and between the fastening ring 260 and the flange 222, so that between the hole 244 and the flange 222 of the stalk 220 It has a structure that seals.

3, a pad 254 is installed between the flange 222 of the stalk 220 and the inner surface of the fastening ring 260 to seal between the fastening ring 260 and the flange 222. In addition, a pad 252 is installed between the stepped 246 and the fastening ring 260 to seal between the fastening ring 260 and the hole 244 where the stepped 246 is formed.

Accordingly, in a state in which the cover 240 of the warming furnace 210 is in close contact with the lower end of the work table 120 and the stalk 220 of the cover 240 and the connecting pipe 170 of the work table 120 are in communication, the warming furnace (210) It becomes possible to maintain confidentiality inside.

A sealing material 256 may be further installed on the upper part of the fastening ring 260 to seal the connection pipe 170 with the lower end. The sealing material 256 is pressurized and brought into close contact between the connecting pipe 170 and the fastening ring 260 to seal between the two members.

As described above, in the molten metal supply device 200 of the present embodiment, even if the stalk 220 is separated from the work table 120 of the casting device 200, it is closely attached to the connection pipe 170 to inject molten metal into the mold 150. can do.

In addition, since the stalk 220 is separated from the work table 120 and installed on the cover 240 of the warming furnace 210, the stalk 220 can be easily heat treated in the process of replacing and supplying molten metal.

That is, the stalk 220 is separated from the work table 120, so when the warming furnace 210 is moved outward from the work table 120, the cover 240 is moved to the preheating place without interference with the casting facility 100, and the stalk (220) can be heat treated. Accordingly, while the molten metal is being replaced in the crucible 230 of the warming furnace 210, the stalk 220 installed on the cover 240 can be heated, and the stalk 220 moves the heated cover 240 to (210) can be installed.

Therefore, by adjusting the temperature of the stalk 220 to the temperature of the molten metal, it is possible to prevent the generation of foreign substances in the molten metal and improve casting quality.

In addition, the molten metal supply device 200 of the present embodiment includes a horizontal driving unit 270 installed on the base plate 110 and connected to the warming furnace 210 to horizontally move the warming furnace 210 below the work table 120. can include more.

Accordingly, when replacing and supplying molten metal, the warming furnace 210 is horizontally moved along the base plate 110 to move outward from the casting facility 100, or the warming furnace 210 after replacing the molten metal is placed under the worktable 120. can be moved again.

As shown in FIGS. 3 and 4, the horizontal drive unit 270 of this embodiment is installed on the base plate 110 and is installed on the transfer rail 272 extending below the work table 120 and the warming furnace 210. It may include a driving wheel 274 that rolls along the transfer rail 272 and a driving unit installed on the base plate 110 and connected to the warming furnace 210 to move the warming furnace 210 .

The drive unit includes a drive sprocket wheel 280 and a driven sprocket wheel 282 spaced apart along the transfer rail 272, a chain 284 connected between the drive sprocket wheel 280 and the driven sprocket wheel 282, and a chain ( 284) and the warming furnace 210, a connection bracket 286 connected to the drive sprocket wheel 280, and a drive motor 288 for rotationally driving the drive sprocket wheel 280.

Two transfer rails 272 forming a pair are installed at intervals on the base plate 110 . The transfer rail 272 may pass through the work table 120 and extend outside the casting facility 100 . The length of the transfer rail 272 may be variously modified. Accordingly, the warming furnace 210 may be moved from below the work table 120 to the outside of the work table 120 along the transfer rail 272 .

On the outside of the warming furnace 210, a vertical bracket 276 is installed in line with the position of the transfer rail 272, and a driving wheel 274 is rotatably installed at the bottom of the vertical bracket 276 and seated on the transfer rail 272. do. Accordingly, when the driver pulls the warming furnace 210, the warming furnace 210 moves while the driving wheel 274 rolls along the transfer rail 272.

In the base plate 110, a groove 278 is formed along the transfer rail 272 between two transfer rails 272, and a driving unit may be installed inside the groove 278.

As shown in FIG. 3, the driving sprocket wheel 280 and the driven sprocket wheel 282 are rotatably installed on both front ends of the groove 278. And, a chain 284 is installed between the driving sprocket wheel 280 and the driven sprocket wheel 282. A connection bracket 286 is installed between the warming furnace 210 and the chain 284 to connect the warming furnace 210 and the chain 284.

Accordingly, when the drive motor 288 is driven to rotate, the drive sprocket wheel 280 is rotated and the chain 284 fastened to the drive sprocket wheel 280 is moved in one direction.

As the chain 284 moves, the warming furnace 210 connected via the chain 284 and the connecting bracket 286 moves. Accordingly, the warming furnace 210 moves along the transfer rail 272 while the drive wheel 274 rolls.

As another embodiment, the driving unit may include a driving cylinder installed on the base plate, disposed in the traveling direction of the transfer rail, and connected to the warming furnace to push or pull the warming furnace. In this structure, as the driving cylinder is stretched and driven, the warming furnace connected to the piston rod of the driving cylinder is moved along the transfer rail.

In this way, as the warming furnace 210 moves along the transfer rail 272, the warming furnace 210 leaves the work table 120 at the lower part of the work table 120 and moves to the outside of the casting equipment 100.

Therefore, the molten metal can be replaced and supplied to the crucible 230 of the holding furnace 210 spaced apart from the casting equipment 100 . When the replacement of the molten metal is completed, the driving motor 288 is rotated in the reverse direction to move the warming furnace 210 under the worktable 120 again, and a casting process may be performed.

6 schematically shows a process of replacing and supplying molten metal according to the present embodiment.

The molten metal accommodated in the warming furnace 210 is supplied to the mold 150 through the stoke 220 through the differential pressure between the mold 150 and the warming furnace 210, and a casting process is performed. When the molten metal accommodated in the warming furnace 210 is exhausted while the casting cycle is repeated, the molten metal is replaced and supplied.

In order to replace and supply molten metal, first, the work table 120 closely coupled to the warming furnace 210 is moved upward and spaced apart from the warming furnace 210 .

In a state where the work table 120 is coupled to the movable plate 130 by the clamping unit 180, the work table 120 along with the movable plate 130 can be moved upward according to the driving of the vertical drive unit 140. .

The work table 120 has only the connecting pipe 170 installed and the stalk 220 is installed on the cover 240 of the warming furnace 210, so that the work table 120 is moved upward while the work table 120 and the stalk 220 ) is separated.

Therefore, the warming furnace 210 and the working table 120 are completely separated from each other, and the warming furnace 210 becomes movable without interference with the working table 120 .

In this embodiment, the lifting distance of the work table 120 is very small compared to the prior art. That is, it is sufficient if the work table 120 is moved only to a position where there is no interference with each other by being spaced apart even a little from the cover 240 of the warming furnace 210 .

Accordingly, the work table 120 may be moved slightly without raising the height, and the warming furnace 210 may be immediately moved to the outside of the casting equipment 100 . Accordingly, it is possible to reduce the time required for the advanced molten metal replacement process as a whole.

When the work table 120 is raised, the horizontal driving unit 270 is driven to move the warming furnace 210 from below the work table 120 to the outside.

When the warming furnace 210 is moved, the cover 240 is removed and new molten metal is replaced and supplied to the crucible 230 . When the replacement of the molten metal is completed, the cover 240 is installed on the warming furnace 210 again. In this process, preheating of the stalk 220 mounted on the cover 240 may be further performed.

When the cover 240 is installed on the warming furnace 210, the horizontal driving unit 270 is operated to move the warming furnace 210 under the worktable 120 of the casting facility 100.

When the warming furnace 210 is positioned under the work table 120, the work table 120 is lowered by the vertical driving unit 140 and closely adheres to the cover 240 of the warming furnace 210. Thus, the stocker installed on the cover 240 of the warming furnace 210 is connected to the connection pipe 170 installed on the work table 120.

When the work table 120 and the warming furnace 210 are connected, a differential pressure is applied to inject molten metal into the mold 150, and the next casting process proceeds. When casting is completed, the worktable 120 and the movable plate 130 are separated, the movable plate 130 is raised with respect to the worktable 120, the mold 150 is opened, and then the casting is taken out of the mold 150.

Although exemplary embodiments of the present invention have been shown and described as described above, various modifications and other embodiments may be made by those skilled in the art. All of these modifications and other embodiments are to be considered and included in the appended claims without departing from the true spirit and scope of the present invention.

100: casting equipment 110: base plate
112: vertical shaft 114: fixed plate
120: work table 130: movable plate
140: vertical drive unit 142: vertical cylinder
150: mold 160: eject unit
170: connector 180: clamping unit
200: molten metal supply device 210: warming furnace
212: bottom plate 214: side wall
216: steel skin 218: insulating material
220: stalk 222: flange
230: crucible 240: cover
241: ring 242: refractory material
244: Hall 246: Step
250: O-ring 252,253: Pad
256: sealing material 260: fastening ring
270: horizontal driving unit 272: transfer rail
274: drive wheel 278: groove
280: drive sprocket wheel 282: driven sprocket wheel
284: chain 286: connecting bracket
288: drive motor

Claims (5)

A base plate forming the floor, a vertical shaft installed vertically on the base plate, a fixed plate installed on top of the vertical shaft to support the vertical shaft, a worktable installed to slide up and down along the vertical shaft and having a lower mold installed on the top, A movable plate disposed on the work table and sliding up and down along the vertical shaft and having an upper mold installed thereon, a vertical drive unit installed on the fixed plate and connected to the movable plate to move the movable plate up and down, on the base plate A warming furnace disposed and connected to the work table to supply molten metal to the mold, a stoke connecting between the warming furnace and the mold to supply the molten metal of the warming furnace to the mold, and applying differential pressure between the warming furnace and the mold to the inside of the mold A molten metal supply device of a differential pressure casting facility including a pressure unit for injecting molten metal,
The molten metal supply device includes a bottom plate for supporting a crucible in which molten metal is accommodated, a side wall surrounding a side surface of the crucible, and a cover installed on an upper end of the side wall to cover the inside, and the cover extends into the crucible. A stalk is installed so that the warming furnace and the stalk form one body, and the stalk is separated from the work table and moves together with the warming furnace,
A hole in which a stalk is installed is formed at the top of the cover, and a step is formed on the inside of the hole to span the flange of the top of the stalk, and the step is coupled to the flange of the top of the stalk to protect the flange. Fastening ring made of a rigid material Is installed, and a pad for sealing is installed between the fastening ring and the step and between the fastening ring and the flange to seal between the hole and the flange of the stalk,
The work table is provided with a connection pipe that is in close contact with the upper end of the stalk and connects between the stalk and the mold, and the connection pipe is formed to a length corresponding to the upper and lower thickness of the work table and is installed through the work table, and the lower end is the It is connected to the stalk and the upper end is connected to the inlet of the lower mold, so that the connection pipe is connected to and separated from the stalk according to the vertical movement of the worktable,
Further comprising a sealing material placed on the fastening ring to seal between the lower end of the connection pipe,
Further comprising a clamping part selectively coupling the movable plate and the work table to separate the connection pipe and the stalk by raising the work table when moving to the warming furnace,
The clamping unit includes a vertical plate installed on the movable plate and extending downward, a fixing hook formed at the tip of the vertical plate, a hanging bar installed on the work table and moved in a horizontal direction to selectively catch the fixing hook, A molten metal supply device of a differential pressure casting facility including an operating cylinder for horizontally moving a hanging bar. delete According to claim 1,
The molten metal supply device of the differential pressure casting facility further comprising a horizontal driving unit installed on the base plate and connected to the warming furnace to horizontally move the warming furnace below the work table. delete According to claim 1,
The horizontal driving unit includes a transfer rail installed on the base plate and extending to the lower part of the work table, a drive wheel installed on the warming furnace and rolling along the transfer rail, a drive sprocket wheel installed on the base plate and spaced apart along the transfer rail, and a driven sprocket. A differential pressure including a wheel, a chain connected between the driving sprocket wheel and the driven sprocket wheel, a connecting bracket connecting the chain and the warming furnace, and a driving motor connected to the driving sprocket wheel to rotate and drive the driving sprocket wheel. Molten metal supply device for casting equipment.

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