KR102199565B1 - Melt supply devicefor die casting - Google Patents

Abstract

The present invention relates to a die-casting melt supply device capable of accurately controlling the supply amount of the melt and stably supplying a clean melt.
The present invention provides a die-casting melt supplying device for supplying a melt to a sleeve in communication with a mold, wherein an injection port communicating with the sleeve is provided on a lower surface, and a storage tank in which the melt is stored in the side and the lower surface of a predetermined height; And a stopper for opening and closing the injection port of the storage tank.

Description

Die casting melt supply device {Melt supply device for die casting}

The present invention relates to a die casting melt supply device capable of accurately controlling the supply amount of the melt and stably supplying a clean melt.

In general, die casting is a precision casting method in which molten metal is injected into a mold to obtain a casting identical to a mold.

Such die casting uses a mold that completely matches the required casting shape through precise machining, and alloys such as zinc, aluminum, tin, copper, and magnesium are used as molten metal, and the molten metal is injected into the mold to cool and solidify. Produce products.

Therefore, a product manufactured by die casting can be manufactured in precise dimensions and shapes, there is little need for reprocessing, excellent mechanical properties, and mass production is possible.

In the past, the molten material was injected into the mold by gravity using a ladle or dosing, but in order to solve the problem that the molten material is supplied in contact with the air and the molten metal is not completely filled into the mold, A device for supplying molten metal using vacuum pressure has been developed.

Korean Patent No. 1688205 relates to a molten light metal casting apparatus using a vacuum pressure, a vacuum generating means (2) that makes the inside of the mold part (1) below atmospheric pressure, and a melt guide path (3) formed in the mold part (1). ) Is provided with a melt pressure-feeding unit 10 for pressure-feeding to the side.

1 is a view showing an example of a die casting melt supply apparatus according to the prior art.

According to the prior art, as shown in FIG. 1, as the vacuum generating means 2 is operated, the inside of the mold part 1 and the sleeve 11 for pushing the melt are brought into a low pressure state, and the melt is lowered by the pressure difference. It is sucked from the molten material storage tank 12 through the molten material suction pipe 13 to the upper sleeve 11 for pushing the molten material.

In this way, when the melt is sucked into the sleeve 11 for pushing the melt, the plunger 14 moves horizontally, pushing the melt inside the sleeve 11 for pushing the melt, and the melt is supplied into the mold part 1 .

However, according to the prior art, in order to lower the pressure over the entire inner side of the mold part and the melt pressure-feeding sleeve, a large vacuum pressure must be provided, and the molten metal is supplied by a relatively large pressure difference.

Therefore, it is difficult to accurately control the supply amount of the melt, and since the melt is supplied to the inside of the mold part while the sleeve is not filled with the melt, a large vortex can be formed in the melt, and die-casting is performed by the pores contained in the melt. There is a problem that may reduce the quality of the product.

In addition, according to the prior art, the melt is in contact with air until the melt is completely filled inside the sleeve for transporting the melt, and oxides and reactive gases are generated by contact with the melt and remain in the melt.

Accordingly, when die-casting is produced by a melt in which oxides and reactive gases remain, not only the structure of the product is uneven, but also the strength decreases, and welding and heat treatment are impossible.

In addition, plunger oil is supplied to prevent abrasion of the plunger in the sleeve, and the melt and plunger oil react to generate fine solid particles of 1 μm or less and liquid particles, and particles that are difficult to collect are processed through an unsealed sleeve. Since it can spread to the middle atmosphere, it can be harmful to the human body of workers or cause environmental pollution.

The present invention has been conceived to solve the problems of the prior art, and an object thereof is to provide a die-casting melt supply device capable of accurately controlling the supply amount of the melt and stably supplying the melt.

In addition, an object of the present invention is to provide a die-casting melt supply apparatus capable of supplying a clean melt without contact with the atmosphere.

In addition, an object of the present invention is to provide a die-casting melt supply device capable of sealing a sleeve.

The present invention is a die-casting melt supply device for supplying the melt to the sleeve in communication with the mold, the injection hole in communication with the sleeve is provided on a lower surface, and a storage tank in which the melt is stored inside the side and lower surface of a predetermined height; And a stopper for opening and closing the injection port of the storage tank.

In the die-casting melt supply device according to the present invention, an injection port communicating with the sleeve is provided on the lower surface of the storage tank, and the injection port is configured to be opened and closed by a stopper. .

Therefore, by controlling the opening and closing of the stopper, it is possible to accurately control the supply amount of the melt supplied from the storage tank to the sleeve, and by pushing the melt filled in the sleeve and injecting it into the inner space of the mold, the occurrence of vortex inside the melt is suppressed and the melt is removed. It can be supplied stably.

In addition, by supplying the molten material from the storage tank to the sleeve without contacting the atmosphere, it is possible to supply a clean molten material by suppressing the generation of oxides and gases generated by reaction with the molten material and air. That is, a product having a uniform structure and high strength can be manufactured, and the cast product can be additionally welded and heat treated.

In addition, after supplying the melt, the sleeve is closed by closing the stopper, so that even if the melt and the plunger oil react to generate fine particles, diffusion into the atmosphere during the process can be prevented. That is, by preventing the diffusion of particulates during the process, it is possible to not only ensure the health of workers, but also improve environmental pollution.

1 is a view showing an example of a die casting melt supply device according to the prior art.
Figure 2 is a view showing a die casting apparatus according to the present invention.
3 and 4 are a side cross-sectional view and a plan view showing a die casting melt supply apparatus according to a first embodiment of the present invention.
Figure 5 is a side cross-sectional view showing a die casting melt supply device according to a second embodiment of the present invention.
Figure 6 is a cross-sectional side view showing a die casting melt supply device according to a third embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings with respect to the present embodiment will be described in detail. However, the scope of the spirit of the invention of this embodiment may be determined from the matters disclosed by this embodiment, and the idea of the invention of this embodiment is implementation of the addition, deletion, change, etc. of components with respect to the proposed embodiment. It will be said to include transformation.

2 is a view showing a die casting casting apparatus according to the present invention.

The die-casting casting apparatus of the present invention includes a mold 110 in which an inner space 110h into which a melt is injected is formed, as shown in FIG. 2, and a vacuum valve 120 for lowering the pressure of the inner space of the mold 110. , A sleeve 130 for supplying the melt to the inner space of the mold 110, a plunger 140 for pushing the melt inside the sleeve 130 toward the mold 110, and pour the melt A ladle 50 and a melt supply device 200 for supplying the melt poured by the ladle 150 to the upper side of the sleeve 130 are provided.

The mold 110 has an inner space 110h into which a melt can be injected, and is positioned vertically.

At this time, the sleeve 120 is connected to the lower side of the mold 110, and the vacuum valve 120 is connected to the upper side of the mold 110.

Therefore, when the melt is injected from the lower side of the inner space 110h of the mold 110 through the sleeve 120, and the vacuum valve 120 is operated, it remains in the inner space 110h of the mold 110 The previously used gas is discharged to the upper side, and the melt flows into the inner space 110h of the mold 110 as the pressure 110h of the inner space of the mold 110 decreases.

In addition, when the molten material is filled in the inner space 110h of the mold 110 and then the mold 110 is cooled, the molten material is hardened and a product having the same shape as the inner space 110h may be made.

The vacuum valve 120 provides vacuum pressure to the inner space 110h of the mold 110 and is installed on the upper side of the mold 110 to communicate with the inner space 110h of the mold 110.

In this way, when the vacuum valve is provided on the upper side of the mold, residual gas is discharged upward in the inner space 110h of the mold 110 by the operation of the vacuum valve 120, and the mold 110 By relatively lowering the pressure of the inner space (110h) of the melt so that the melt flows from the lower side, it is possible to reduce the generation of pores due to the vortex of the melt.

According to an embodiment, the vacuum valve 120 may be interlocked with the operation of the melt supply device 200, which will be described in detail below.

The sleeve 130 is a kind of supply pipe for supplying the melt to the inner space 110h of the mold 110, and is horizontally under the mold 110 so as to communicate with the inner space 110h of the mold 110. Installed.

According to an embodiment, a supply hole 130h communicating with the melt supply device 200 is provided on the upper side of the sleeve 130, and when the melt supply device 200 is not operated, the supply hole 130h ) Is blocked, and the inside of the sleeve 130 is sealed.

The plunger 140 is a kind of cylinder that pushes the melt inside the sleeve 130 and is located in a direction opposite to the mold 110.

Therefore, when the plunger 140 is horizontally moved inside the sleeve 130, the melt inside the sleeve 130 is forcibly moved toward the mold 110, and the melt is transferred from the sleeve 130 to the mold ( It is injected into the inner space 110h of 110).

Of course, the residual gas inside the sleeve 130 is also injected into the inner space 110h of the mold 110, but as described above, as the vacuum valve 120 is operated, the inner space of the mold 110 ( 110h) It exits to the upper side.

The ladle 150 is a container with an open top surface capable of holding a melt, and is installed on the upper side of the melt supply device 200 to be rotated at a set angle.

Accordingly, when the ladle 150 is rotated by a set angle, the melt can be poured onto the upper side of the melt supply device 200.

The melt supply device 200 is also installed in communication with the supply hole 130h on the upper side of the sleeve 130, and is configured to supply the melt by quantity without contact with the atmosphere, which will be described in detail below.

3 and 4 are side cross-sectional views and plan views illustrating a die casting melt supply apparatus according to a first embodiment of the present invention.

The molten material supply device according to the first embodiment of the present invention includes a storage tank 210 in which a molten material is contained and an injection port 212h is provided at a lower surface 212h, as shown in FIGS. 3 to 4, and the storage tank 210 It includes a stopper 220 for opening and closing the inlet 212h of, and a hydraulic cylinder 230 for raising and lowering the stopper 220.

The storage tank 210 is a type of container with an open upper surface, and is composed of a side 211 and a lower surface 212 having a predetermined height so that the molten material can be stored, and the ladle 150 can pour the molten material from the upper side. Is composed.

A heating unit 213 is further provided along the side surface 211 of the storage tank, and the heating unit 213 is provided on the side surface 211 of the storage tank so that the melt contained in the storage tank 210 can be uniformly heated. ) May be provided with a plurality of spaces at a predetermined interval in the vertical direction.

According to an embodiment, the heating unit 213 may be configured in various ways, such as an electric heater or an induction heating element capable of heating the melt to maintain the temperature of the melt above a set temperature.

Of course, the side surface 211 of the storage tank may be additionally equipped with a separate insulating material (not shown) to keep the melt warm, or may be made of an insulating material, but is not limited thereto.

A guide 214 is further provided on the upper side of the injection hole 212h, the guide 214 may be configured to increase in diameter from the injection hole 212h upward, and the stopper 220 is located inside It is configured to control the injection of the melt as it is settled.

A connection part 215 connecting between the storage tank 210 side injection hole 212h and the sleeve 130 side supply hole 130h is further provided, and the connection part 215 goes downward from the injection hole 212h. It can be configured to narrow the diameter.

The connection part 215 may be configured integrally with the guide 214, and a lower portion of the connection part 215 must be airtightly connected to the supply hole 130h on the sleeve 130 side.

At this time, the storage tank 210 should be configured to be detachable from the sleeve 130, and the storage tank 210 side connection part 215 is detachably installed in the sleeve 130 side supply hole 130h. desirable.

A separate partition wall 216 is further provided inside the storage tank 210, the partition wall 216 is positioned so as to completely surround the inlet 212h, is formed lower than the height of the side surface 211, and It is preferable to be made of a ceramic material that not only blocks overreaction, but also does not wear out.

Based on the partition wall 216, it is divided into an outer space A between the side surface 211 and the partition wall 216 and an inner space B inside the partition wall 216, and the ladle 150 is It is configured to supply the melt to the outer space (A).
The partition wall 216 may be provided to face the side surface 211 of the storage tank 210 at a predetermined interval.

The stopper 220 not only blocks the reaction with the melt, but is made of a ceramic material that does not wear out, and has a shape and size that can be seated inside the guide 214.

The hydraulic cylinder 230 is located outside the upper side of the storage tank 110 and connected to the upper portion of the stopper 220, and is configured to drive the stopper 220 up and down.

When the operation of the hydraulic cylinder 230 is adjusted, the degree of opening and closing and the opening and closing time between the stopper 220 and the guide 214 can be adjusted, and the injection amount of the melt flowing between the stopper 220 and the guide 214 Can be controlled.

The operation of the melt supply device according to the first embodiment configured as described above is as follows.

When the ladle 150 pours the molten material into the outer space (A) of the storage tank, foreign matter (S) such as sludge contained in the molten material sinks to the lower surface 212 of the storage tank on the side of the outer space (A), and When the outer space (A) of the storage tank is filled, only relatively clean molten material located above the outer space (A) of the storage tank passes through the partition wall 216 and flows into the inner space (B) of the storage tank.

In addition, while the ladle 150 pours the molten material into the storage tank 110, the heating unit 113 is operated, and the molten material inside the storage tank 110 can be stably maintained or adjusted above a set temperature. have.

Next, when the molten material with improved cleanliness flows into the inner space (B) of the storage tank, the hydraulic cylinder 230 raises the stopper 220 and the stopper 220 opens the guide 214.

Therefore, a relatively clean melt on the inner space (B) side of the storage tank is guided by the guide 214 and the connection part 215, and can be supplied into the sleeve 130 without contact with external air, and the The supply amount of the melt can be quantitatively controlled according to the degree of opening and closing of the stopper 220.

However, when the melt is not completely filled inside the sleeve 130 and the plunger 140 operates and pushes it in one direction, the melt enters the inner space (110h: shown in FIG. 2) of the mold and causes a vortex. Can occur.

Accordingly, when the melt is completely filled in the sleeve 130, the hydraulic cylinder 230 lowers the stopper 220, and the stopper 220 closes the guide 214.

Next, the plunger 140 operates to push the melt filled in the sleeve 130 in one direction, so that the melt is injected from the sleeve 130 into the inner space 110h of the mold, and the mold As (110) cools, a product with a uniform structure can be produced.

In addition, the vacuum valve 120 (shown in FIG. 2) may be interlocked with the hydraulic cylinder 230, and when the melt is not supplied into the sleeve 130, the vacuum valve is operated, thereby limiting the The inner space 110h of the mold can be maintained in a vacuum state.

Accordingly, it is possible to prevent residual gas from being discharged upward from the inner space 110h of the mold and contacting the molten material with external air.

On the other hand, the melt inside the sleeve 130 may react with the oil injected to prevent abrasion of the plunger 140 to generate a large amount of fume and oil vapor.

However, when the vacuum valve 120 (shown in FIG. 2) is operated, solid particulates and liquid particulates generated inside the sleeve 130 can be safely collected and processed through a predetermined flow path, ensuring the health of workers. Not only can it be possible, but it can also prevent environmental pollution.

5 is a side cross-sectional view showing a die casting melt supply apparatus according to a second embodiment of the present invention.

The melt supply device 300 according to the second embodiment of the present invention is composed of a storage tank 310, a stopper 320 and a hydraulic cylinder 330 in the same manner as in the first embodiment, as shown in FIG. , In order to prevent the molten material stored in the storage tank 310 from contacting the atmosphere, an upper surface 317 that blocks the upper side of the storage tank 310 is provided.

At this time, the hydraulic cylinder 330 is mounted on the upper surface 317 of the reservoir, and a hole 317h is provided on the upper surface of the reservoir 310 so that the molten material can be poured by the ladle 150.

On the other hand, the melt supply device 300 of the second embodiment can be applied when the space between the mold 110 (shown in FIG. 2) and the inlet 312h of the storage tank is relatively narrow than in the first embodiment. .

In detail, the width or widthwise size of the storage tank 310 applied to the second embodiment is smaller than that of the first embodiment, and the partition wall 316 is configured to cross the space inside the storage tank 310 to both sides. Is located.

According to an embodiment, based on the partition wall 316, the space inside the storage tank 310 is a space A in which the molten material is supplied by the ladle 150, and the injection hole 312h is located. It is divided into the other side space (B).

Of course, it is preferable that the partition wall 316 is formed lower than the height of the side surface 311 and is formed of a ceramic material that does not wear out as well as block reaction with the melt.

Therefore, when the ladle 150 pours the molten material into the space (A) on one side of the storage tank, foreign matter (S) such as sludge contained in the molten material goes to the bottom surface 312 of the storage tank on the side of the space (A) Sit down.

In addition, when the melt is filled in the space (A) on one side of the storage tank, only the relatively clean melt located above the space (A) on one side of the storage tank crosses the partition wall 316 and flows into the space on the other side of the storage tank (B). , It is supplied into the sleeve 130 through an injection hole 312h located on the other side of the storage tank (B).

In this way, by mounting the melt supply device 300 according to the second embodiment even in a narrow space, the melt with improved cleanliness can be supplied to the inside of the sleeve 130, and a detailed description of supplying the melt will be described in the first embodiment. As it is the same as the example, it will be omitted.

6 is a side cross-sectional view showing a die casting melt supply apparatus according to a third embodiment of the present invention.

The melt supply device 400 according to the third embodiment of the present invention is composed of a storage tank 410, a stopper 420 and a hydraulic cylinder 430 in the same manner as in the second embodiment, as shown in FIG. , If the space between the mold 110 (shown in FIG. 2) and the injection port 412h of the storage tank is relatively narrower than in the second embodiment, the inside of the storage tank 410 may be applied in a structure in which the partition wall is omitted have.

At this time, by configuring the height of the guide 414 protruding above the injection port 412h to be relatively long, foreign substances such as sludge contained in the melt may be configured to sink to the lower surface of the guide 414. .

Therefore, after the ladle 150 pours the molten material into the hole 417h of the storage tank, the sleeve 130 moves the molten material inside the storage tank 410 by opening and closing the stopper 420 without contacting the outside air. ) Can be supplied inside.

110: mold 120: vacuum valve
130: sleeve 130h: supply hole
140: plunger 150: ladle
200: melt supply device 210: storage tank
211: side 212: bottom
212h: injection port 213: heating part
214: guide 215: connection
216: bulkhead

Claims (10)

In the die casting melt supply device for supplying the melt to the sleeve in communication with the mold,
A storage tank having an injection port in communication with the sleeve provided on a lower surface, and storing a molten material inside the side and the lower surface at a predetermined height; And
Includes; a stopper for opening and closing the inlet of the storage tank,
The storage tank,
Further comprising a partition wall surrounding the injection hole and protruding upward from the lower surface to a height lower than the height of the side surface,
A die-casting melt supply device in which the melt is supplied from the upper side between the side surface and the partition wall. The method of claim 1,
The storage tank,
Die-casting melt supply device including a heating unit that is built in along the side and can heat the melt. The method of claim 2,
The heating unit,
A die-casting melt supply device provided with a plurality of at a predetermined interval in the vertical direction on the side of the storage tank. The method of claim 2,
The heating unit,
Die casting melt supply device consisting of one of an electric heater and an induction heating element. The method of claim 1,
The storage tank,
It includes a guide whose diameter becomes wider as it goes upward from the inlet,
The stopper,
A die casting melt supply device seated on the inside of the guide. The method of claim 5,
The storage tank,
A die-casting melt supply device comprising a connection part communicating with the injection port and the upper side of the sleeve. The method of claim 6,
The connection part,
A die-casting melt supplying device having a diameter narrowing downward from the injection port and integrally formed with the guide. The method of claim 1,
The partition wall,
A die casting melt supplying device provided to face the side of the storage tank at a predetermined interval. The method according to any one of claims 1 to 8,
A die casting melt supply device further comprising a; hydraulic cylinder provided on the upper side of the storage tank and moving the stopper in the vertical direction. The method of claim 9,
The storage tank,
A die-casting melt supply apparatus comprising an upper surface on which the hydraulic cylinder is seated and a hole through which the melt is supplied is provided on one side.

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