KR20210114210A - Pouring apparatus for casting - Google Patents

Abstract

The present invention relates to an apparatus for pouring molten metal for casting, comprising: a molten metal supply pipe supplying molten metal from the outside; a port member receiving the molten metal from the molten metal supply pipe and supplying the molten metal to a casting mold; a capacity control member controlling the amount of molten metal poured from the port member into the casting mold; a height control member controlling the position of the port member in response to the height of the molten metal poured into the casting mold; and a control unit controlling the capacity control member and the height control member. In addition, an end of a submergence device of the port member has a configuration in which the molten metal is poured in a state of being submerged into the molten metal accommodated in the casting mold. By such a configuration, the present invention can precisely control the amount of molten metal to be poured, and in particular, since the molten metal is poured into the lower space of the molten metal by the submergence device which is submerged into the molten metal of the casting mold, can effectively block air, thereby maximally preventing the occurrence of dross or foreign substances.

Description

Molten metal injection device for casting {POURING APPARATUS FOR CASTING}

The present invention relates to a molten metal injection device, and more particularly, it is mounted on a casting device for casting a lead (Pb) ingot, and improves the quality of the formed lead (Pb) ingot by maximally suppressing the occurrence of dross. It relates to a quiet molten metal injection device.

In general, the casting process involves heating a metal and pouring a molten material into a mold to solidify it in a certain shape. In particular, the weight of lead ingots in a lead (Pb) casting plant is 25KG, but most Therefore, 100KG ingots are also cast.

And in the process of receiving high-temperature molten metal and pouring it into a mold in such a casting process, the molten metal is always exposed to the atmosphere.

Accordingly, the high-temperature molten metal reacts with oxygen and dissolved oxygen in the atmosphere to generate oxides and foreign substances. The oxides produced here remain in the molten metal, and the molten metal is injected into a mold to manufacture an ingot.

When such oxides or foreign substances are contained, there is a problem in that the quality of the ingot is deteriorated.

In order to solve this problem, "a ladle for manufacturing high-clean castings (Registration No. 10-0436400 Announcement No. 2004. 06. 16)" has been proposed.

As shown in FIGS. 6 and 7, the "ladle for manufacturing high-clean castings (registration number 10-0436400, 2004. 06. 16 announcement)" has a molten metal 1011 in the ladle body, which is a container. It is injected, and a sealing cover 103 that blocks the injected molten metal 101 from the atmosphere and prevents oxide formation is provided in the upper opening of the body to seal the body, and the inside of the sealing cover 103 is a refractory material It is filled with (106).

The pipe for sealing installed inside the sealing cover 103 filled with the refractory material 106 uses a stainless pipe with a diameter of 10 to 15 mm to seal around the ladle, and a gas supply couple for sealing on the sealing cover 103 It is a configuration in which the ring 104 is installed.

At this time, the installed pipe is configured to make a hole with a diameter of 5 to 10 mm at an interval of at least 100 to 120 mm, and to spray an inert gas around the ladle to enable sealing.

And, in order to directly supply the inert gas to the surface of the molten metal 101, a gas supply coupling 105 for preventing oxidation of the surface of the molten metal is installed on the cover 103 to prevent the molten metal 101 from being oxidized by contact with oxygen. restrain it as much as possible.

In addition, in order to increase the adhesion between the sealing cover 103 and the ladle body, a clip 108 is used to seal the seal during sealing, and a stopper 107 is provided at the ladle tap to seal during sealing.

The bubbling device at the bottom of the ladle uses a porus plug 111 to generate an inert gas bubble 110 in the molten metal 101 to separate and levitate the generated non-metallic inclusions. , the periphery is configured to be filled with a refractory material (106).

Document 1: Registered Patent Publication No. 10-0819637 (announcement on April 04, 2008) "Method and apparatus for casting molten metal to form a cast metal strip ingot" Document 2: Registered Patent Publication No. 10-1245452 (2013. 03. 19 Announcement) "Composite Ingot Casting Method and Apparatus" Document 3: Registered Patent Publication No. 10-1445931 (Announcement on October 26, 2014) "Molten metal injection device for die casting" Document 4: Registered Patent Publication No. 10-1455597 (Announcement on October 28, 2014) "Molten metal injection device for rolling roll casting" Document 5: Registered Patent Publication No. 10-1677582 (Notice on November 18, 2016) "Metal injection method for die casting process"

However, as shown in FIG. 7 , in the process of pouring molten metal into the mold using the "ladle for manufacturing high-clean casting products (registration number 10-0436400 Announcement No. 10-0436400 2004. 06. 16)" according to the prior art, exposure to air will become

As described above, since the molten metal is in contact with air during the injection into the mold, there is a problem in that dross and foreign substances are generated inside the mold.

Therefore, the present invention has been devised to solve the constant problems, and an object of the present invention is to minimize the generation of dross or foreign substances in the process of casting a lead ingot (ingot) having a weight of 25KG or 100KG. It is to provide a molten metal injection device for casting capable of casting a lead (Pb) ingot of the same weight.

The above object is achieved by the present invention, and according to an aspect of the present invention, a molten metal injection device for casting includes: a molten metal supply pipe for supplying molten metal from the outside; a port member receiving the molten metal from the molten metal supply pipe and supplying the molten metal to the mold; a capacity control member for controlling the amount of molten metal injected from the port member into the mold; a height control member for controlling the position of the port member in response to the height of the molten metal injected into the mold; and a control unit for controlling the capacity control member and the height control member, respectively.

And the port member is a metal port in which a receiving portion is formed in which the molten metal supplied from the molten metal gob supply pipe is accommodated; and an inlet through which the molten metal is discharged to the mold located at the lower portion of the molten metal accommodated in the accommodating part on the lower surface of the metal pot; And it characterized in that it consists of a shut-off valve for controlling the molten metal discharged from the inlet.

In the present invention, the height control member is formed horizontally and a horizontal lifting frame fixed to the metal port; an elevating vertical frame supporting the elevating horizontal frame; and a lifting means for elevating the vertical frame.

According to another aspect of the present invention, the lifting means includes a lifting motor; a chain operated by the elevating motor; and a sprocket wheel fastened to the chain, characterized in that the lifting vertical frame is lifted by the operation of the sprocket wheel.

In addition, the elevating horizontal frame is fixed on both sides of the metal port, respectively, and the elevating vertical frame is composed of a cylinder, characterized in that the lifting by the operation of the sprocket wheel.

In the present invention, the capacity control member comprises: a mold float that is raised and lowered by interlocking with the height of the molten metal accommodated in the mold; a laser sensor for measuring the elevation height of the mold float; a valve operating shaft for lifting and lowering the shut-off valve up and down; It characterized in that it is composed of an operation axis control means for controlling the lifting and lowering of the valve operation shaft.

According to another aspect of the present invention, the actuation axis control means is characterized in that it consists of a cylinder or a numerical control motor.

And the inlet is made of a tubular shape, and the end of the inlet is characterized in that it is infiltrated into the molten metal accommodated in the mold.

In addition, when the metal port rises, the lower end of the miscellaneous inlet is infiltrated into the molten metal accommodated in the mold, and the shut-off valve is opened so that the molten metal is discharged into the mold.

In the present invention, one end of the elevating horizontal frame is connected to a vertically fixed support frame and slidable, and the other end is connected to the elevating vertical frame to be elevated.

And a photo float that is lifted up and down by the molten metal supplied from the molten metal supply pipe in the metal port is additionally mounted, and the molten metal supplied from the molten metal supply pipe is intermittent according to the elevation height of the port float.

According to the above configuration of the present invention, the amount of the molten metal injected into the metal pot and the amount of the molten metal injected into the mold are measured by the pot float and the mold float, respectively, so that the amount of the molten metal injected can be precisely controlled. In particular, since the molten metal is injected into the lower space of the molten metal by the infiltration port that is infiltrated into the molten metal of the mold, the air is effectively blocked, thereby maximally suppressing the generation of dross or foreign substances.

1 is a front view of a molten metal injection device for casting according to an embodiment of the present invention.
Figure 2 is a plan view of the molten metal injection device for casting shown in Figure 1;
Figure 3 is a side view of the molten metal injection device for casting shown in Figure 1;
Figure 4 is a view for explaining the operation of the molten metal injection device for casting.
5 is a block diagram of the main components.
6 and 7 are views for explaining the prior art.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals will be used for the same parts throughout the drawings.

The molten metal injection device for casting according to the present invention shown by reference numeral 10 is composed of a port member 20, a capacity control member 30 and a height control member 40, and the like.

The port member 20 receives the external molten metal through the molten metal supply pipe 64, and supplies the molten metal to the mold 62 located below.

And the capacity control member 30 controls the amount of molten metal injected from the port member 20 into the mold 62 , and the height control member 40 controls the amount of molten metal injected into the mold 62 . It is a member for controlling the position of the port member 20 in response to the height.

And a control unit 50 for controlling the port member 20, the capacity control member 30, and the height control member 40, respectively, is configured (see FIG. 5).

The port member 20 will be described with reference to FIGS. 1 and 4 .

As shown in the drawings, the port member 20 is composed of a metal port 21 , a submersible inlet 23 , and a shut-off valve 25 .

The metal port 21 has a shape in which the upper part is opened and the side and lower parts are closed, and a receiving part is formed in the center to receive the molten metal supplied from the molten metal supply pipe 64 .

And the inlet 23 is formed on the lower surface of the metal port 21, the molten metal accommodated in the accommodating portion is a pipe (pipe) through which the molten metal is discharged to the mold 62 located at the lower portion.

The shut-off valve 25 is a valve that controls the molten metal discharged from the inlet 23 to the mold 62 .

The height control member 40 is composed of a horizontal lifting frame 41 , a vertical lifting frame 43 , and a lifting means 44 . The elevating horizontal frame 41 is formed horizontally as shown in FIGS. 1 and 3 and is fixed to the metal port 21 .

A pair of the lifting vertical frame 43 is fixed to the end of the pair of the lifting horizontal frame (41). And the elevating means 44 elevates the pair of elevating vertical frames 43 .

In addition, one end of the pair of horizontal elevating frames 41 is connected to a pair of vertically fixed support frames 71 to slide, and the other end is connected to the elevating vertical frame 43 to be elevated.

Therefore, when the upper end of the lifting vertical frame 43 rises by the lifting means 44, the lifting horizontal frame 41 also rises, and accordingly, the metal port 21 also rises.

As shown in FIG. 3 , the lifting means 44 includes a lifting motor 45 and a chain 47 operated by the lifting motor 45 and a sprocket wheel 49 fastened to the chain 47 , etc. is composed of According to this configuration, the sprocket wheel 49 is driven by the operation of the lifting motor 45, and the vertical frame 43 is raised and lowered in conjunction therewith.

However, the elevating means 44 is not limited to the elevating motor 45, the chain 47, and the sprocket wheel 49, but may be elevated by a cylinder (not shown).

The capacity control member 30 is a member that controls the amount of molten metal supplied to the mold 62 , and as shown in FIG. 3 , is a mold that is raised and lowered by interlocking with the height of the molten metal accommodated in the mold 62 . The laser sensor 33 for measuring the elevation height of the float 31 and the mold float 31, the valve operating shaft 35 for vertically moving the shut-off valve 25, and the elevation of the valve operating shaft 35 It is composed of an operation axis control means 37 and the like for controlling the. The actuation axis control means 37 is composed of a numerical control motor (39).

The inlet 23 of the present invention is made in the shape of a pipe (PIPE), and the end of the inlet 23 is infiltrated into the molten metal accommodated in the mold 62 to block the contact of air.

And when the metal port 21 rises, the lower end of the miscellaneous inlet 23 is infiltrated into the molten metal accommodated in the mold 62 , and the shut-off valve 25 is opened so that the molten metal flows into the mold 62 . composition that is emitted.

In addition, as shown in FIG. 2 , a photo float 27 that is lifted up and down by the molten metal supplied from the molten metal supply pipe 64 in the metal port 21 is mounted, and the height of the port float 27 is raised. Accordingly, the molten metal supplied from the molten metal supply pipe 64 is interrupted.

The operation of the molten metal injection device 10 for casting as described above of the present invention will be described in detail as follows.

First, as shown in FIG. 4 , in a state in which the metal port 21 is transported upward by the height control member 40 , the mold 62 moves along the transport rail 80 to the metal port ( 21), the control unit 50 lowers the metal port 21 to the position shown in FIG. 1 by the elevating means 44 of the height control member 40.

In such a state, molten metal is injected into the metal port 21 from the molten metal supply pipe 64 , and the height of the injected molten metal is sensed by the port float 27 , and the level of the molten metal in the metal port 21 is detected by the port float 27 . will be regulated.

And when the capacity control member 30 operates the numerical control mot 39 to transfer the valve operating shaft 35 upward, the shut-off valve 25 opens and the molten metal accommodated in the metal port 21 is opened. It is injected into the mold 62 through the inlet 23 .

The water level of the molten metal injected into the mold 62 is sensed by the mold float 31, and the control unit 50 operates the height control member 40 according to the sensed signal to operate the metal port 21. is raised to the position of FIG. 4 .

As described above, while the metal port 21 rises, the molten metal is injected into the mold 62 while the inlet 23 is immersed in the molten metal accommodated in the mold 62 .

For reference, since the melting temperature of lead (Pb) in the molten metal is about 400°C, the inlet 23 or the metal port 21 may be made of an iron (Fe) material having a melting temperature of about 1500°C.

As described above, since the molten metal is injected while the inlet 23 is infiltrated into the molten metal inside the mold 62, contact with air is minimized.

When the amount of molten metal injected into the mold 62 reaches a certain amount, the control unit 50 operates the capacity control member 30 to close the shut-off valve 25 to stop the molten metal injection.

In this state, when the metal port 21 rises to a certain height by the height control member 40, the mold 62 into which the molten metal is injected is transferred to the outside along the transfer rail 80, and a new As the mold 62 enters, the molten metal is newly injected.

What has been described above is merely an embodiment for implementing the molten metal injection device for casting according to the present invention, and the present invention is not limited to the above embodiment, but departs from the scope of the present invention as claimed in the claims below. Without this, anyone with ordinary knowledge in the field to which the invention pertains will say that the technical idea of the present invention exists to the extent that various modifications can be made.

10: molten metal injection device for casting, 20: photo member,
21: metal port, 23: infiltration,
25: shut-off valve, 27: port float,
30: capacity control member, 31: mold float,
33: laser sensor, 35: valve operating shaft,
37: operating axis control means, 39: numerical control motor,
40: height control member, 41: elevating horizontal frame,
43: elevating vertical frame, 44: elevating means,
45: elevating motor, 47: chain,
49: sprocket wheel, 50: control unit,
62: mold, 64: molten metal supply pipe,
71: support frame, 80: transport rail

Claims (11)

In an apparatus for injecting molten metal into a mold,
Molten metal supply pipe for supplying molten metal from the outside;
a port member receiving the molten metal from the molten metal supply pipe and supplying the molten metal to the mold;
a capacity control member for controlling the amount of molten metal injected into the mold from the port member;
a height control member for controlling the position of the port member in response to the height of the molten metal injected into the mold; and a control unit for controlling the capacity control member and the height control member, respectively. According to claim 1, wherein the port member is a metal port in which the receiving portion is formed to accommodate the molten metal supplied from the molten metal gob supply pipe; and an inlet through which the molten metal is discharged to the mold located at the lower portion of the molten metal accommodated in the accommodating part on the lower surface of the metal pot; and an intermittent valve for intermittent control of the molten metal discharged from the inlet. According to claim 2, wherein the height control member is formed horizontally and a horizontal lifting frame fixed to the metal port; an elevating vertical frame supporting the elevating horizontal frame; and an elevating means for elevating the elevating vertical frame. 4. The apparatus of claim 3, wherein the lifting means comprises: a lifting motor; a chain operated by the elevating motor; and a sprocket wheel fastened to the chain, the molten metal pouring apparatus for casting, characterized in that the lifting vertical frame is lifted by the operation of the sprocket wheel. [Claim 5] The molten metal injection device for casting according to claim 4, wherein the horizontal frame is fixed on both sides of the metal port, and the vertical frame is formed of a cylinder and is lifted by the operation of the sprocket wheel. 4. The method of claim 3, wherein the capacity control member comprises: a mold float that is raised and lowered by interlocking with the height of the molten metal accommodated in the mold; a laser sensor for measuring the elevation height of the mold float; a valve operating shaft for lifting and lowering the shut-off valve up and down; Molten metal injection device for casting, characterized in that it is composed of an operating shaft control means for controlling the elevation of the valve operating shaft. [Claim 7] The molten metal injection apparatus for casting according to claim 6, wherein the actuating axis control means comprises a cylinder or a numerical control motor. [Claim 8] The molten metal injection device for casting according to claim 7, wherein the inlet has a tubular shape, and an end of the inlet is infiltrated into the molten metal accommodated in the mold. The molten metal for casting according to claim 7, wherein when the metal port is raised, the lower end of the miscellaneous inlet is infiltrated into the molten metal accommodated in the mold, and the shut-off valve is opened to discharge the molten metal into the mold. injection device. [Claim 10] The molten metal injection device for casting according to claim 9, wherein one end of the horizontal frame is connected to a vertically fixed support frame to be slidable, and the other end is connected to the vertical frame to be lifted. 11. The method according to claim 10, wherein a photo float that is lifted up and down by the molten metal supplied from the molten metal supply pipe in the metal port is additionally mounted, and the molten metal supplied from the molten metal supply pipe is intermittent according to the elevation height of the port float. A molten metal injection device for casting, which is characterized.

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