KR102365088B1 - Automatic continuous supply system FOR clean molten metal - Google Patents

Abstract

The present invention relates to an automated apparatus for continuously supplying molten metal, which supplies molten metal melted in a melting furnace to a casting device in order to produce a cast product, and more specifically, to an automated apparatus for continuously supplying molten metal, which removes foreign substances contained in the molten metal through various processes in various ways to supply high-grade molten metal to a casting unit and has an opening/closing device which tightly closes an opening/closing hole to enable a predetermined amount of molten metal to be stably supplied. The automated apparatus for continuously supplying molten metal according to the present invention comprises: a molten metal receiving chamber receiving the molten metal supplied by the melting furnace; a molten metal discharging chamber supplying the molten metal to a casting device; and an opening/closing device opening or closing a flow path at the molten metal discharging chamber, wherein a magnet is disposed in the outside of the flow path between the molten metal receiving unit and the molten metal discharging chamber to make foreign materials contained in the molten metal flowing through the flow path adsorbed onto a surface of the flow path. The automated apparatus (3) for continuously supplying molten metal according to the present invention remotely communicates with a central control room by using 5G technology to transmit a variety of information on the temperature, level and the like of the molten metal to the central control room and receive a control signal from the central control room, thereby being remotely controlled. Accordingly, backflow and leakage of the molten metal can be prevented to allow high quality cast products to be produced.

Description

Automatic continuous supply system FOR clean molten metal

The present invention relates to an automatic continuous supply system for clean molten metal that automatically and continuously supplies molten metal melted in a melting furnace to a plurality of casting machines using a pipe line and an automatic molten metal supply device for the production of casting products, and more particularly, to In the supply device, foreign substances contained in the molten metal are removed in various ways through several steps to supply high-quality molten metal to the casting machine. It's about the device.

In general, low-pressure casting is a casting machine installed on the upper side of the hot water supply pipe by applying air or inert gas at a relatively low pressure to the molten metal surface in a closed container and pushing up the molten metal in the opposite direction to gravity through the stalk immersed in the molten metal. It refers to a casting method in which molten metal is poured into the mold of

This low-pressure casting is widely used in the manufacture of engine blocks, cylinder heads, wheels, etc., because there are few internal defects of the casting and it is possible to manufacture precise parts.

To produce casting products, the low-pressure casting system consists of a melting furnace that melts ingot, a metal raw material, to make molten metal; made up of devices.

The molten metal supply device removes gas contained in the molten metal, removes foreign substances, and supplies a constant pressure to the casting machine while maintaining a constant temperature.

As the prior art related to the molten metal supply device, Patent Publication 10-2017-0034689 “Molten metal supply device for low-pressure casting”, Registration Patent 10-1403503 “Molten metal supply device”, Registration Patent 10-0666629 “Molten metal supply device for low-pressure casting machine”, etc. this was initiated

Ingot, a raw material for metal, contains many foreign substances. Therefore, the molten metal of the ingot melted in the melting furnace contains many foreign substances, and the molten metal discharged after filtering the foreign substances from the melting furnace also contains foreign substances.

The presence or absence of foreign substances determines the quality of the cast product. Therefore, the molten metal supply device also removes foreign substances contained in the molten metal. In the prior art, a filter is mainly disposed in the flow path of the molten metal supply device to remove foreign substances from the molten metal passing through the filter.

However, there is a limit to the removal of foreign substances from the molten metal through the filter, so the molten metal supply device according to the prior art cannot supply high-purity molten metal to the casting machine.

An opening/closing hole is provided in the flow path between the molten metal supply apparatus and the hot water chamber, and the opening/closing hole is opened and closed by an opening/closing rod or an opening/closing plate. When molten metal is supplied to the casting machine in the hot water chamber, the opening/closing hole is closed with an opening/closing rod or an opening/closing plate.

As the period of use increases, molten metal or foreign substances accumulate on the contact surface of the opening/closing rod or the wall surface of the opening/closing hole, and a gap is generated on the contact surface, and the molten metal or air flows back and leaks through the gap. When this reverse flow leakage phenomenon occurs, the molten metal supply to the casting machine becomes unstable, and defects may occur in the casting product.

The present invention is an invention devised to solve the problem of the automatic molten metal supply device according to the prior art. It removes foreign substances from the molten metal through various steps in various ways other than a filter in the flow path between the water chamber and the molten metal chamber, and uses it for a long time. The purpose of this purpose is to provide an automatic continuous supply system of clean molten metal having an automatic molten metal supply device that allows the opening and closing rod of the Edo switch to completely seal the opening and closing holes to prevent backflow leakage and produce high-quality main products.

The automatic continuous supply system of clean molten metal according to the present invention for achieving the above object is

An automatic continuous supply system for clean molten metal, comprising: a pipeline through which molten metal melted in a melting furnace flows; In

The molten metal automatic supply device is

a water chamber receiving molten metal from the melting furnace;

a hot water chamber that supplies molten metal to a casting machine;

Including; a switch for opening and closing the flow path on the side of the tap room;

It is characterized in that a magnet for adsorbing foreign substances contained in the molten metal passing through the flow path to the surface of the flow path by magnetic force is provided outside the flow path between the bath chamber and the hot water chamber.

And it is characterized in that the molten metal passing through is collided with the inner wall of the flow path between the bath room and the hot water chamber, and a immersion section in which curves are formed to increase the contact movement length of the molten metal is provided,

the opener

an opening and closing rod having an end having a tapered surface corresponding to the inclined surface of the opening and closing hole provided on the flow path;

an elevating cylinder for elevating and lowering the opening/closing rod to open and close the opening/closing hole;

It characterized in that it comprises a rotating cylinder for rotating the opening and closing rod in a state in which the inclined surface and the tapered surface are in contact,

A guide for guiding the molten metal flowing out from the inlet toward the upper portion and the edge of the tapping chamber is provided at the entrance of the hot water chamber connected to the flow path.

The automatic continuous supply system of clean molten metal according to the present invention removes foreign substances contained in the molten metal in the automatic molten metal supply device by using the immersion section in which magnetic force and curves of the magnet are formed in addition to the filter, and the molten metal flowing into the tapping chamber is separated from the upper part through the guide part. After moving to the edge, it gradually moves to the hot water supply pipe located at the lower center of the hot water chamber, and foreign substances are deposited on the bottom edge of the hot water chamber, and high-purity molten metal is sucked into the hot water supply pipe. It is a very useful invention for industrial development as a system that closes the opening and closing holes by removing foreign substances attached to the tapered surface of the opening and closing rods and manufacturing high-quality castings in the casting machine.

1 is a structural diagram of an automatic continuous supply system of clean molten metal according to the present invention;
Figure 2 is a plan view of the automatic molten metal supply apparatus according to the present invention.
Fig. 3 is a structural diagram AA in Fig. 2;
Fig. 4 is a sectional view of BB in Fig. 2;
FIG. 5 is a cross-sectional view of CC in FIG. 2;
6 is a DD cross-sectional structural view in FIG.
7 is a structural diagram showing the flow path in FIG. 2 expanded;
8 is a view showing the flow of molten metal by the guide of the tap room.

Hereinafter, an automatic continuous supply system for clean molten metal according to the present invention will be described in detail with reference to the drawings.

Prior to explaining in more detail the automatic continuous supply system of clean molten metal according to the present invention,

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference sign, particularly the number of the tens and one digit, or the reference numerals having the same tens, one, and alphabet, indicates a member having the same or similar function, and, unless otherwise specified, each The member indicated by the reference sign may be regarded as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick), small (or thin) or simplified in size or thickness in consideration of convenience of understanding, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

First, referring to Figure 1, the casting system is a melting furnace (1) for dissolving ingot, a metal raw material, degassing the molten metal and maintaining a constant temperature, a casting machine (2) for manufacturing a casting product, molten metal a plurality of automatic molten metal supplying devices 3 for supplying the (6), and a transfer conveyor (5) for transferring the cast product manufactured in the casting machine (2). Here, the automatic continuous supply system of clean molten metal according to the present invention is composed of a pipeline 6 , a branch pipe 7 , and an automatic molten metal supply device 3 .

The molten metal melted in the melting furnace (1) is supplied to the molten metal automatic supply device (3) through the pipe (6). At this time, the pipeline 6 is a high temperature of several hundred degrees, so safety accidents must be taken care of. The present invention prevents a safety accident in which an operator comes into contact with the pipeline by allowing the pipeline 6 to be arranged on the upper or lower portion of the transport conveyor 5, and reduces the burden of separately securing an installation space for the pipeline.

A plurality of automatic molten metal feeders and casting machines are installed next to the conveying conveyor 5, and the branch pipe 7 connects the pipe 6 and the automatic molten metal feeder 3 so that the molten metal is continuously and automatically supplied.

2 to 7 , the automatic molten metal supply apparatus according to the present invention includes a water bath 10 , a temperature increase chamber 20 , a degassing chamber 30 , and a hot water chamber 40 .

The water chamber 10 receives the molten metal melted in the melting furnace 1 through the pipe line 6 and the branch pipe 7 .

The temperature rising chamber 20 is connected to the water bath 10, and a heater 21 is installed to maintain a constant temperature of the molten metal.

The degassing chamber 30 is connected to the temperature rising chamber 20, and an injection pipe 31 for injecting a gas such as nitrogen or argon or a flux solvent is installed to degas the molten metal.

In the process of melting the ingot in the melting furnace (1), hydrogen gas is generated and dissolved in the molten metal. The waste gas contained in the molten metal is not only released as bubbles during solidification, but also remains in the cast product and develops into gas bubbles and pores, causing product defects. The degassing chamber 30 removes such hydrogen gas.

In the hot water chamber 40, a hot water supply pipe 41 is vertically installed in the center, and a pneumatic pipe 42 for injecting air is installed at the top thereof. It is sucked into the hot water supply pipe (41) and supplied to the mold of the casting machine (2) to be molded.

A magnet 51 is provided inside the bottom of the temperature increasing chamber 20 and the degassing chamber 30 as the outside of the flow path through which the molten metal flows in the molten metal automatic supply device.

The magnet 51 exerts attractive force on the foreign material of the metal component contained in the molten metal by magnetic force so that it is attached to the floor, and forms a magnetic field around it so that the foreign material of the specific component floats and attaches to the upper wall of the flow path, to stabilize

An immersion section 52 is provided on the inner wall of the flow path between the bath chamber 10 and the hot water chamber 40 . Curves 53 are continuously formed in the immersion section 52 . The molten metal passing through the immersion section 52 collides with the bends 53, and as the length at which the molten metal moves in contact with the inner wall of the flow path increases, some of the foreign substances contained in the molten metal more effectively fall into the bends 53. is attached

A filter 54 is provided in the flow path between the hot water chamber 10 and the hot water chamber 40 to adsorb and remove foreign substances contained in the molten metal passing through the filter 54 .

A temperature sensor 55 for measuring the temperature of the molten metal and a level sensor 56 for measuring the water level of the molten metal are provided in the flow path between the hot water chamber 10 and the tap chamber 40 and the tap chamber 40 .

As the level sensor 56, an ultrasonic sensor, a proximity sensor, an infrared sensor, etc. may be used.

The controller (not shown) controls the operation of the heater so that the molten metal maintains a constant temperature using the temperature and level of the molten metal detected and transmitted by the temperature sensor 55 and the level sensor 56, and the operation of the switch 60 is controlled. The supply timing and supply amount of the molten metal are automatically controlled so that the molten metal in the tapping chamber 40 does not run short by controlling the molten metal.

An opening/closing hole 57 is formed in the flow path biased to the hot water chamber 40 , and an opening/closing device 60 for opening and closing the opening/closing hole 57 is provided.

When the molten metal is supplied to the casting machine 2 through the hot water supply pipe 41 in the tapping chamber 40, the switch 60 closes the opening and closing hole 57 to block the reverse flow of the molten metal, and When the molten metal water level in (40) is lowered to below the reference value, the switch (60) opens the opening/closing hole (57) so that the molten metal is automatically introduced into the tapping chamber (40).

An inclined surface 58 is formed around the opening and closing hole 57 , and a tapered surface 62 having an inclination corresponding to the inclined surface 58 is formed at an end of the opening and closing rod 61 of the switch 60 .

When the opening and closing rod 61 descends, the opening and closing hole 57 is closed while the inclined surface 58 and the tapered surface 62 come into close contact with each other.

The switch 60 further includes an elevating cylinder 63 for raising and lowering the opening and closing rod 61 and a rotating cylinder 64 or a motor for rotating the opening and closing rod 61 .

When used for a long period of time, the molten metal is hardened and attached to the inclined surface 58 of the opening and closing hole 57 and the tapered surface 62 of the opening and closing rod 61, and these are the inclined surface 58 and the tapered surface 62. By creating a gap between the molten metal or gas in the tapping chamber 40, a backflow phenomenon occurs. When a reverse flow of molten metal or gas occurs, the supply of molten metal to the casting machine 2 may become unstable and product defects may occur.

The rotating cylinder 64 intermittently rotates the opening/closing rod 61 in a state in which the opening/closing rod 61 closes the opening/closing hole 57, thereby removing foreign substances adhering to the inclined surface 58 and the tapered surface 62. By removing it, the opening/closing hole 57 is tightly closed.

The hot water supply pipe 41 of the hot water chamber 40 is located in the center of the hot water chamber 40 , and the entrance is adjacent to the floor of the hot water chamber 40 . Therefore, the molten metal flowing out from the entrance of the hot water chamber 40 connected to the flow path moves directly toward the entrance of the hot water supply pipe 41, and the molten metal moves at a high speed and takes foreign substances deposited on the floor. ) is inhaled.

In order to prevent the foreign substances deposited on the floor of the hot water chamber 40 from being sucked into the hot water supply pipe 41 , the present invention provides a guide 43 in front of the entrance of the hot water chamber 40 .

The guide 43 allows the molten metal flowing out from the inlet to move toward the top and the edge. Thus, the molten metal introduced into the hot water chamber 40 descends from the upper edge of the hot water chamber 40 and gradually moves toward the entrance of the hot water supply pipe 41 in the center. That is, the molten metal first introduced into the hot water chamber 40 is sucked into the hot water supply pipe 41 with a time difference.

As the molten metal introduced into the hot water supply chamber 40 is gradually sucked into the hot water supply pipe 41 in a first-in, first-out manner, foreign substances contained in the molten metal are deposited on the floor of the hot water chamber 40, and the deposited foreign substances are drawn to the hot water supply and sucked. As it is minimized, high-purity molten metal is supplied to the mold of the casting machine 2 .

A plurality of automatic molten metal supply devices 3 configured as described above transmit various information such as temperature and water level of molten metal to the central control room through remote communication using 5G technology with the central control room, and receive control signals from the central control room to control them remotely do.

The present invention is a system capable of realizing automation and unmanned operation by applying AI technology and IT technology to the casting process, actively responding to the innovation demands of the foundry industry according to the 4th industrial revolution.

The present invention is an automated facility in which a robot can directly inject molten metal into a casting machine on behalf of a worker, and the Internet of Things technology connects the casting site and the central control room to monitor each casting process in real time, enabling optimal remote management and operation It is a system that allows the casting site to be transformed into a data-based smart factory according to the rapid flow of the 4th industrial revolution.

In the above description of the present invention, an automatic continuous supply system for clean molten metal having a specific shape and structure has been described with reference to the accompanying drawings, but the present invention can be variously modified and changed by those skilled in the art, and such modifications and changes It should be construed as belonging to the protection scope of the present invention.

1: melting furnace 2: casting machine
3: automatic molten metal supply device 10: water bath
20: heating room 21: heater
30: degassing chamber 31: injection pipe
40: hot water room 41: hot water supply pipe
42: pneumatic tube 43: guide
51: magnet 53: bend
54: filter 56: level sensor
57: opening and closing hole 58: inclined surface
60: switch 61: open and close rod
62: tapered surface 63: elevating cylinder
64: rotating cylinder

Claims (4)

An automatic continuous supply system for clean molten metal, comprising: a pipeline through which molten metal melted in a melting furnace flows; In

The molten metal automatic supply device is
a water chamber receiving molten metal from the melting furnace;
a hot water chamber that supplies molten metal to a casting machine;
Including; a switch for opening and closing the flow path on the side of the tap room;

The automatic continuous supply system of clean molten metal, characterized in that a guide is provided at the entrance of the tapping chamber connected to the flow path to guide the molten metal flowing out from the entrance toward the upper portion and the edge of the tapping chamber. The method of claim 1,
The automatic continuous supply system of clean molten metal, characterized in that the molten metal passing through collides with the inner wall of the flow path between the bath and tap room, and a immersion section is provided in which curves to increase the contact movement length of the molten metal are provided. The method of claim 1,
the opener
an opening and closing rod having an end having a tapered surface corresponding to the inclined surface of the opening and closing hole provided on the flow path;
an elevating cylinder for elevating and lowering the opening/closing rod to open and close the opening/closing hole;
and a rotating cylinder for rotating the opening/closing rod while the inclined surface and the tapered surface are in contact with each other. 4. The method according to any one of claims 1 to 3,
An automatic continuous supply system for clean molten metal, characterized in that a magnet for adsorbing foreign substances contained in the molten metal passing through the flow path to the surface of the flow path by magnetic force is provided outside the flow path between the water bath and the hot water chamber.

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