KR101939596B1 - Apparatus for feeding carbon of automated casting system and method for using the same apparatus - Google Patents

Abstract

The present invention relates to a device and a method for feeding carbon of an automated casting system, specifically, comprising: a carbon tank in which powdered coal is stored; an air gun main body for forming a vacuum inside the carbon tank so as to vacuum-suction the powdered coal; and an intermittent part disposed inside the air gun main body for interrupting a flow path of the powdered coal, and operation of the intermittent part is controlled in accordance with an amount of carbon evaporation of the powdered coal supplied from a melting furnace in which the cast iron is dissolved, thereby capable of preventing deterioration of the quality of products.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic casting system,

The present invention relates to an apparatus and a method for supplying carbon in an automation casting system, and more particularly, to a method and apparatus for supplying carbon in a molten metal by repeatedly injecting a small amount of carbon To a carbon feeder and method of an automated casting system capable of maintaining product quality.

In general, a casting machine is a device for heating and melting a metal or a plastic and then injecting it into a mold to produce a certain type of product. Currently, a casting system that automates most of the processes is used.

A typical configuration of an automation casting system includes a melting furnace for heating a metal and melting it as a molten metal in a liquid phase, a casting device provided with a mold table and arranged so as to be operable at an upper portion thereof, and a molten metal injection Device and the like.

In the casting of metal products, cast iron can be classified into white cast iron, iron cast iron, gray cast iron and the like depending on the color of the broken face. In most cases, the cast iron has a hardness higher than that of carbon steel.

In the case of a cast iron having such a high hardness, it is necessary to intermittently supply an appropriate amount of carbon corresponding to the amount exhausted in the molten metal in the melting furnace in order to maintain an appropriate hardness. Of course, when the carbon content of the molten metal is higher than the reference value, oxygen is blown into the melting furnace to cause a CO2 reaction, thereby removing carbon components.

A representative example of carrying out the carbon supply as described above is disclosed in Korean Patent Publication No. 10-2010-0035019 (hereinafter referred to as "Prior Art").

However, the coal supplied by the prior art has a problem that the carbon content of the molten metal is still lower than the reference value due to evaporation of a small amount of carbon in the melting furnace, and in this case, the defect rate of the product is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for supplying carbon in an automated casting system capable of lowering a defect rate of a product by additionally supplying a carbon amount evaporated from a coal supplied to a melting furnace For that purpose.

A preferred embodiment of the carbon supply system of the automation casting system according to the present invention is a carbon supply system for a casting system comprising a carbon tank in which coal is stored, an air gun body for forming a vacuum inside the carbon tank for vacuum suction of the powder, And controls the operation of the intermittent portion in accordance with the carbon evaporation amount of the coal supplied from the melting furnace in which the cast iron is melted.

Here, the carbon tank and the air gun main body may be connected by a flexible hose so that the pulverized coal flows inside.

In addition, the intermittent portion may be provided with a solenoid valve to electronically control the flow cross sectional area on the flow path.

The vacuum cleaner may further include a vacuum forming part coupled to the air gun body and forming the vacuum inside the air gun body.

A preferred embodiment of the carbon supply method of the automation casting system according to the present invention is characterized in that a first coal powder supply process for supplying coal powder to the melting furnace firstly and a carbon powder evaporation amount detecting portion for the carbon powder evaporation amount sensor during the first coal powder supply process And a vacuum is applied to the inside of the air gun main body so that the pulverized coal of different times or different amounts is sucked into the interior of the main body of the air gun and discharged to the furnace and supplied to the furnace depending on the amount of carbon evaporation detected by the carbon evaporation amount sensing process And a secondary spraying supplying step of controlling a vacuum forming part for forming the spraying part and an intermittent part for interrupting the flow path of the powder.

Here, the secondary pulverizing process may be performed by opening / closing the flow cross-sectional area of the pulverized coal in the air gun main body, and controlling the intermittent part provided with the solenoid valve.

According to a preferred embodiment of the carbon supply system and method of the automation casting system according to the present invention, by supplementing the amount of carbon evaporation amount of the coal supplied to the melting furnace, it is possible to satisfy the reference value of the carbon content and lower the defect rate of the product I have.

1 is a schematic view showing an example of an automated casting system according to the present invention,
2 is a schematic view showing a preferred embodiment of the carbon feeding apparatus of the automation casting system according to the present invention,
3 is a sequence block diagram illustrating a preferred embodiment of a method for supplying carbon in an automated casting system according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a carbon feeding apparatus and method of an automotive casting system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an example of an automatic casting system according to the present invention, and FIG. 2 is a schematic view showing a preferred embodiment of a carbon feeding apparatus of an automation casting system according to the present invention.

First, before explaining a preferred embodiment of the carbon supply device of the automation casting system according to the present invention, for convenience of understanding, an example of the automated casting system will be briefly described.

1, the automation casting system includes a melting furnace 1 for heating a metal and melting it as a liquid molten metal, and a mold 4 having a mold table 5 and being operable And a molten metal injection device 2 for supplying the molten metal from the molten metal furnace 1 into the mold 4. [

The molten metal injection device 2 is provided on a horizontal rail that is placed on a pair of supports and is repeatedly reciprocatingly moved along the horizontal rail to be injected into the molten metal injection cup 2a mounted at the lower end of the molten metal injection device 2, (1) to the position of the metal mold (4).

Although not shown specifically, the mold base 5 is disposed on the mold table 5, the lower mold of the mold 4 is coupled to the upper portion of the mold base, and the mold is rotated by the motor. A mold separating mechanism for moving the mold 4 up and down is coupled to the mold 4. An apparatus for preheating and cooling the mold 4 and an air cleaning apparatus are provided around the mold 4, A clamp is provided which can be lifted and moved.

A brief description of the operation of the automated casting system with such a configuration is as follows.

The molten metal injection apparatus 2 is moved along the horizontal rail and the molten metal injection cup 2a at the lower portion of the molten metal injection apparatus 2 is connected to the melting furnace 1 while the molten metal melting furnace 1 is operated and the molten metal is received therein. The mold base is rotated at an appropriate speed of 500 to 3,000 rpm to rotate the mold 4. In this case, In this state, when the molten metal dropped down while the molten metal injection cup 2a is tilted is injected into the rotating mold 4, the rotational force of the mold 4 acts on the molten molten metal to spread in the centrifugal direction by the centrifugal force of the mold 4 As it goes out, it produces a hollow casting.

On the other hand, in the automated casting system, as shown in Fig. 2, a carbon supply device 10, 70 for supplying coal to the melting furnace 1 may be provided. The carbon supply device (10, 70) is designed to load powdered carbon into the melting furnace (1), thereby preventing the hardness of the cast iron, which is a molten material, from lowering, thereby maintaining the quality of the product.

As shown in Fig. 2, the carbon supply apparatuses 10 and 70 are relatively positioned above the melting furnace 1, and the coal supply apparatuses 10 and 70, in which the coal is charged into the melting furnace 1 by its own weight, And a pulverized air supply device 70 described later.

The coal powder feeder 10 includes an apparatus main body 20 forming an outer shape for securing an inner space, a coal powder storage unit 30 formed at an upper portion of the apparatus main body 20 to communicate with the inner space, A transfer device unit 50 communicating with the lower portion of the storage unit 30 and extending outside the side surface of the apparatus main body 20 to guide the transfer of the pulverized coal supplied to the inside into the melting furnace, (40) for supplying power to the coal pulverizer (30) to feed the pulverized coal through the feeder unit (50) and a feed drive source (40) for a predetermined time period (Not shown) for controlling the pulverizing coal to be charged into the melting furnace 1 by operating it.

In addition, in the automated casting system, the carbon supply device (10, 70) includes a carbon evaporation amount detection unit for detecting the carbon evaporation amount of the coal burdened by the first carbon supply device (10) into the melting furnace And a pulverized coal air supplying device 70 for pulverizing the pulverized coal into the melting furnace 1 according to the amount of carbon evaporation measured by the carbon evaporation amount detector.

The pulverized air supplying device 70 is a carbon supplying device for supplying a kind of carbon into the melting furnace 1 together with the coal pulverizing device 10 described above.

2, the pulverized air supply device 70 includes a carbon tank 71 in which pulverized coal is stored, an air gun main body 72 that forms a vacuum inside the carbon tank to vacuum-suck the coal from the carbon tank, (Not shown) disposed in the inside of the pulverizing flow path 72 and interrupting the flow path of the pulverized coal.

Here, it is preferable that the carbon tank 71 and the air gun main body 72 are connected to each other by the flexible hose 73 so that the pulverized coal flows inside. This is because, in the case of the above-described coal powder feeder 10, the pulverized coal supply device 70 is designed to supply pulverized coal by its own weight for smooth supply of the pulverized coal to the melting furnace 1, This is because the pulverized coal is supplied through the discharge.

The intermittent part is preferably a solenoid valve that is electronically controlled and controls the flow cross sectional area on the flow path of the coal in the main body 72 of the air gun. However, it is not always necessary to control only the flow cross-sectional area on the flow path of the coal to adjust the supply amount of the coal, and if the precise control is not required, the supply amount of the coal can be adjusted through the simple timer.

However, in a preferred embodiment of the present invention, the solenoid valve is intermittently controlled so that the coal is repetitively supplied in a zone where the amount of carbon evaporation is generated from the melting furnace 1.

2, the pulverized air supplying device 70 is connected to the air gun main body 72 and is provided with a vacuum forming part 74 for forming a vacuum so as to form a suction force of the above- (74). ≪ / RTI >

The vacuum forming part 74 is provided with a suction force enough to supply the pulverized coal from the carbon tank 71 to the inside of the airgun main body 72 through an electrically driven driving motor, It is sufficient to obtain a vacuum forming the soil discharge discharged to the melting furnace 1.

Meanwhile, in a preferred embodiment of the present invention, for convenience of understanding, the coal supply device 10 and the coal air supply device 70 described above are provided as different carbon supply devices 10, 70 It is preferable to use only the pulverized air supplying device 70 which is simple in design and easy to design without having to be separately configured.

That is, as shown in FIG. 2, the coal powder feeder 10 is a structure known from Korean Patent Laid-Open Publication No. 10-2010-0035019. In the coal powder feeder 10, In order to easily supply the pulverized coal, the tip height of the apparatus main body 20 must be higher than the melting furnace 1, and a part of the feeder unit 50 must also be downwardly inclined. There is a problem.

On the other hand, the pulverized air supply device 70 can change the inside of the pulverized air supply device 70 to a vacuum state to receive the pulverized coal from the carbon tank 71 through the flexible hose 73, The space required is small and the work space can be efficiently utilized.

A preferred embodiment of the carbon supply method of the automation casting system according to the present invention will be described with reference to the accompanying drawings.

3 is a sequence block diagram illustrating a preferred embodiment of a method for supplying carbon in an automated casting system according to the present invention.

As shown in FIG. 3, a preferred embodiment of the carbon feeding method of the automation casting system according to the present invention includes a primary coal supplying step S10 for supplying primary pulverized coal to a melting furnace, (S20) for measuring the evaporation amount of carbon by using the carbon evaporation amount sensing unit during the carbon deposition amount sensing step (S10), and a second coal powder supplying step for supplying additional carbonization amount according to the carbon evaporation amount detected by the carbon evaporation amount sensing step (S30).

As described above, the first coal pulverizing process S10 and the second coal pulverizing process S30 are performed in accordance with the amount of pulverized coal, the working environment, and the like, (70) so that the pulverized coal is separately supplied.

However, depending on the embodiment, the first coal pulverization process S10 and the second coal pulverization process S30 may be provided either by the coal powder feeder 10 or by the pulverized coal feeder 70.

Meanwhile, in the second coal powder supplying step S30, coal powder having different amounts of time or different amounts is sucked from the carbon tank 71 into the air gun main body 72 in accordance with the carbon evaporation amount detected by the carbon evaporation amount sensing unit, A vacuum forming part 74 for forming a vacuum inside the air gun main body 72 so as to be supplied to be discharged and supplied to the sprayer 1, and an intermittent part for interrupting the flow path of the pulverizer.

Particularly, the secondary pulverizing process (S30) effectively controls the solenoid valve provided to open and close the flow cross sectional area on the flow path of the coal in the air gun main body 72, thereby appropriately supplying the carbon necessary for the melting furnace 1 It is a process to prevent the deterioration of product quality.

It should be noted that this is a completely different method from a series of processes in which the necessary carbon is supplied to the melting furnace 1 by using only the conventional coal powder feeder 10.

Hereinafter, preferred embodiments of the carbon supply apparatus and method of the automated casting system according to the present invention are described in detail with reference to the accompanying drawings. However, it should be understood that the embodiments of the present invention are not necessarily limited to the above-described preferred embodiments, and that various modifications and equivalents may be made by those skilled in the art something to do. Therefore, it is to be understood that the true scope of the present invention is defined by the following claims.

1: Melting furnace 2: Melting device
3: Casting device 4: Centrifugal mold
5: Mold table 10: Powder feeder
20: apparatus main body 30:
40: feed drive source 50: feeder unit
70: Blower air supply device 71: Carbon tank
72: Air gun body 73: Flexible hose
74: Vacuum forming part S10: First coal blasting process
S20: Carbon Evaporation Detection Process S30: Secondary Coal Feeding Process

Claims (6)

A carbon tank in which the coal is stored;
An air gun body for forming a vacuum inside the carbon tank to vacuum-suck the coal;
And an intermittent portion disposed inside the airgun main body for interrupting the flow path of the pulverized coal,
And the operation of said intermittent portion is controlled in accordance with the carbon evaporation amount of the coal powder supplied from the melting furnace in which the cast iron is dissolved.
The method according to claim 1,
Wherein the carbon tank and the air gun main body are connected by a flexible hose so that the pulverized coal flows inside.
The method according to claim 1,
Wherein the intermittent portion is provided with a solenoid valve to electronically control the flow cross sectional area on the flow path.
The method according to claim 1,
Further comprising a vacuum forming part coupled to the air gun body and forming the vacuum inside the air gun body.
A primary coal supplying step of supplying primary coal into the melting furnace;
A carbon evaporation amount sensing step of measuring carbon evaporation amount using the carbon evaporation amount sensing unit during the primary coal powder supply step;
A vacuum forming unit for forming a vacuum inside the air gun main body so as to be vacuum-sucked into the air gun main body at different times or different amounts depending on the amount of carbon evaporation detected by the carbon evaporation amount detection process and supplied to the melting furnace, And a second coal supplying step of controlling an intermittent part for interrupting the flow path of the automotive casting system.
The method of claim 5,
Wherein the second coal powder supplying step is performed by opening and closing a flow cross sectional area on the flow path of the pulverized coal in the air gun main body and controlling the intermittent part provided with the solenoid valve.

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