KR101670999B1 - Quantitative pouring system - Google Patents

Abstract

The present invention relates to a system for injecting a quantity of molten metal into a mold in a casting process. The present invention relates to an apparatus for measuring the weight of a molten metal injected into a mold of a casting bogie by separating a rail from a rail of the moving unit and mounting a rail on which a mold bogie moves, And a control unit for controlling the metering unit and the injection unit to inject a predetermined amount of molten metal into the mold. The metering unit may include a metering unit for measuring the metering unit, a metering unit for injecting the molten metal into the mold, present.

Description

Quantitative pouring system

The present invention relates to a system for injecting a quantity of molten metal into a mold in a casting process.

Casting refers to a method of making a shape by pouring a liquid material into a mold to solidify it. Specifically, it is to heat and dissolve scrap iron, pig iron, ferroalloy or nonferrous metal raw materials in various furnaces, to pour molten metal adjusted into appropriate components into sand or metal molds, and to cool and solidify them. When the molten metal is injected into the cavity of the mold made of the desired model and the molten metal solidifies, it becomes the same metal object as the model.

In general, casting is a traditional industry in the automobile, shipbuilding and machine tool industries, and it is a necessary technology to produce core parts in large quantity or multiple types, and it is gradually becoming high quality, high efficiency and environment friendly.

One important point in this casting process is the injection of a quantity of molten metal into the mold. This is because it is possible to produce a molded article of high quality and high efficiency when a predetermined amount of molten metal is injected into the mold.

Conventionally, in order to inject a predetermined amount of molten metal into a mold, the level of the molten metal put into the mold was measured by a level sensor to determine whether or not the molten metal was quantified. However, when the molten metal is injected at a high speed, the level is changed due to the elongation of the molten metal and the like. Therefore, it is difficult to inject the molten metal quickly or to inject the molten metal.

Korean Patent Publication No. 10-2014-0103396 (2008.08.27)

The present invention provides a metering system capable of injecting a molten metal into a mold by measuring the weight of the molten metal when the molten metal is injected into a mold placed on a separate path.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to an aspect of the present invention, there is provided an apparatus for measuring the weight of a casting machine, comprising: a moving part having a rail on which a casting bogie moves; An injection unit for injecting molten metal into a mold placed in the quantitative measurement unit, and a control unit for controlling the quantitative measurement unit and the injection unit to inject a predetermined amount of molten metal into the mold, Lt; RTI ID = 0.0 > injection < / RTI > system.

The mold bogie may have a protrusion, and the moving unit may include a stopper unit for pushing the protrusion of the mold bogie to move the mold bogie away from the quantitative measurement unit.

The stopper unit includes a bracket having a hinge point formed thereon, a cylinder coupled to the bracket, and one end coupled to the rod of the cylinder and rotatably coupled to a hinge point of the bracket, And a pushing member for pushing the projecting portion of the mold bogie.

Meanwhile, the quantitative measurement unit may include a base plate, a cover plate coupled with the base plate, and a weight sensor interposed between a plurality of points between the base plate and the cover plate and measuring the weight of the melt.

The metering section may further include a level measuring unit for measuring a level of the molten metal and an injection time measuring unit for measuring an injection time of the injection unit, It is possible to monitor whether or not it has arrived.

According to the embodiment of the present invention, it is possible to inject a molten metal into a mold in a fixed amount by measuring the weight of the mold when separating the moving path of the mold bogie from the middle and injecting the molten metal into the mold placed on the separated path .

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

1 is a schematic diagram of a dosing system in accordance with an embodiment of the present invention;
2 is a plan view showing a moving part employed in the embodiment shown in Fig.
FIG. 3 is a schematic view showing a quantitative measurement part employed in the embodiment shown in FIG. 1; FIG.
4 is an exploded perspective view of the quantitative measurement unit shown in Fig.
5 is a schematic view for measuring whether or not the molten metal is quantitatively measured in the dosing system according to the embodiment shown in FIG.
FIG. 6 is a graph showing a state where quantitative injection is performed in the quantitative injection system according to the embodiment shown in FIG. 1;

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It will be possible. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Hereinafter, a dosing system according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present specification, the same reference numerals are assigned to the same components in different embodiments, and the description thereof is replaced with the first explanation.

1 is a schematic diagram of a dosing system in accordance with an embodiment of the present invention.

A quantitative injection system 100 according to an embodiment of the present invention includes a moving unit 1, a quantitative measurement unit 2, an injection unit 3, and a control unit 4.

The moving part 1 is provided with a rail 11 on which the mold carriage 10 moves and the rail 21 of the movable part 1 is separated from the rail 11 of the moving part 1, The weight of the molten metal 30 injected into the mold 20 of the carriage 10 is measured to determine whether or not the molten metal 30 injected into the mold 20 is quantified.

The mold carriage 10 is a conveying mechanism for conveying the mold 20, and the mold 20 is moved up to the mold carriage 10. The mold bogie 10 moves along the rail 11 and measures the weight of the molten metal 30 after separating the rail 11 from the quantitative measurement unit 2 so that accurate weight measurement is possible.

Since the weight of the molten metal 30 is proportional to the amount of the molten metal 30 injected, it is possible to determine whether the molten metal 30 is quantitatively determined by measuring the weight of the molten metal 30.

The molten metal 30 is injected into the mold 20 located in the quantitative measurement unit 2 and the control unit 4 controls the quantitative measurement unit 2 and the injection unit 3 to form the mold 20 The molten metal 30 is injected in a predetermined amount.

The injection unit 3 injects or blocks the molten metal 30 into the mold 20 under the control of the control unit 4. The control unit 4 may continue or stop the injection of the molten metal 30 depending on the weight of the molten metal 30 transmitted from the quantitative measurement unit 2. [

The weight of the mold 20 is measured by separating the movement path of the mold bogie 10 from the middle and then injecting the molten metal 30 into the mold 20 placed on the separated path, ) Can be injected in a fixed amount.

2 is a plan view showing a moving part employed in the embodiment shown in Fig.

The moving part 1 is provided with a rail 11 and moves along the rail 11. The mold carriage 10 moves along the rail 11 as a path along which the mold carriage 10 moves as the process progresses.

The moving part 1 is configured in such a state that the table 12 on which the rails 11 are mounted is supported by a plurality of legs 13. The wheels of the mold carriage 10 are moved while being guided by being engaged with the rails 11 provided on the table 12.

The mold bogie 10 is pushed and moved by a push cylinder (not shown) provided at one side of the moving part 1. A push cylinder (not shown) pushes one mold bogie 10 and pushes the pushed mold bogie 10 in succession to the adjacent mold bogie 10 to move the whole mold bogie 10. The push cylinder can push the mold bogie 10 with a constant stroke and allow one mold bogie 10 to be placed on the metering portion 2 by a single operation of the push cylinder.

A stopper unit 14 may be provided in a region adjacent to the quantitative measurement unit 2 in the moving unit 1. [ The stopper unit 14 measures the weight of the mold bogie 10 placed on the quantification part 2 by restricting the position of the mold bogie 10 placed on the quantification part 2 and the positions of the mold bogies 10 adjacent to the front and back The weight of the adjacent mold carriages 10 is partially measured to prevent interference.

The protrusion 10a is formed in the mold bogie 10 and the stopper unit 14 pushes the protrusion 10a of the mold bogie 10 to move the mold bogie 10 away from the quantification part 2 Respectively.

The stopper unit 14 includes a bracket 141 on which a hinge point is formed and a cylinder 142 coupled to the bracket 141 and one end of which is coupled to the rod of the cylinder 142, And a pressing member 143 for pivoting the projecting portion 10a of the mold carriage 10 to the other end by driving the cylinder 142. [

The pressing member 143 is pivoted by the operation of the cylinder 142 and the pressing member 143 pushes the projection 10a formed on the mold carriage 10 to move the mold carriage 10 to the quantification measuring unit 2. [ As shown in FIG.

FIG. 3 is a schematic view showing a quantitative measurement part employed in the embodiment shown in FIG. 1, and FIG. 4 is an exploded perspective view of the quantitative measurement part shown in FIG.

The metering part 2 is provided with a rail 21 on which the mold bogie 10 moves and is separated from the rail 11 of the moving part 1 and measures the weight of the molten metal 30 to measure the quantity of the molten metal 30 Whether or not the molten metal 30 is quantitatively measured can be measured in parallel with the level measurement and the injection time measurement.

The quantitative measurement unit 2 is configured such that the cover table 23 is placed on the base plate 22 with the weight detection sensor 24 interposed therebetween and the rail 21 is installed on the cover table 23. The base plate 22, the cover table 23, and the rails 21 are separated from the moving unit 1.

The table 12 of the moving unit 1 is provided so as to extend behind the quantitative measurement unit 2. [ The mold bogie 10 moves on the left table 12 of the moving part 1 and then enters the quantitative measuring part 2. After a predetermined amount of the molten metal 30 is put into the mold 20, 1 on the right-side table 12.

A weight input / output terminal 25 is connected to the weight detection sensor 24 and inputs information to the weight detection sensor 24 through the weight input / output terminal 25 or an output from the weight detection sensor 24.

The weight detection sensor 24 measures the amount of the molten metal 30 to be injected, for example, as a load cell. A plurality of weight detection sensors 24 may be provided. In this embodiment, the weight detection sensor 24 is arranged in a triangular shape at three portions where the base plate 22 and the cover table 23 are in contact with each other, and by measuring the amount of molten metal in combination, the stability of measurement can be increased.

The method for measuring the weight of the molten metal 30 is a method of measuring the weight of the mold bogie 10 including the mold 20 in the weight detecting sensor 24 when the mold bogie 10 enters the quantitative measuring unit 2, And the weight of the molten metal 30 is increased to be the weight of the molten metal 30 after the molten metal 30 is injected.

Meanwhile, the weight input / output terminal 25 is connected to the weight detection sensor 24 and the controller 41 to output information about the weight detection sensor 24 and to output the amount of molten metal to be injected, An upper limit and a lower limit are set, and an input function such as transmission of injection amount data is also performed.

The mold bogie 10 is provided with a mold 20 and has a function of moving the mold 20 according to the process and a mold 30 corresponding to the mold 20 can be manufactured by injecting the molten metal 30 into the mold 20 Let's do it.

The metering section 2 may also be provided with a level measuring unit 26 capable of measuring the level of the molten metal 30 and a metering time measuring unit 27 measuring the metering time of the molten metal 30.

The level measuring unit 26 can measure or measure the level of the molten metal 30 through the vision system or use a laser.

The time and angle at which the laser emitted from the light emitter 261 in the laser measuring device including the light emitter 261 and the light receiver 262 reach the light receiver 262 after being reflected by the melt 30 is calculated So that the level of the molten metal 30 can be measured.

The laser may be a line laser or a dot laser. In the case of the line laser, since the level of one line of the surface of the melt 30 is measured, it is better than that of the point laser measuring the level of one point of the surface of the melt 30. A more accurate measurement value can be obtained.

When the level is measured using a laser, the inlet at which the molten metal 30 is injected in the mold 20 can be controlled so that the level is 100% and the level is less than the level. That is, the level of 100% means that the molten metal 30 overflows and can be adjusted to a level of, for example, less than 95%.

The injection time measuring unit 27 measures the time when the injection of the molten metal 30 starts in the injector 32 in order to measure the injection time of the injection unit 3 and measures whether or not the molten metal 30 reaches a predetermined amount within a predetermined time do.

The level measuring unit 26 and the injection time measuring unit 27 are used to control the injection time and the level of the molten metal 30 in the mold 20 together with the control of the weight of the mold 20, ) Can be performed more accurately.

The injection section 3 is constituted of an injection input / output terminal 31 and an injector 32 as a part for injecting the molten metal 30 into the mold 20 located in the quantitative measurement section 2.

The injection input / output terminal 31 sets the injection weight, displays the injection weight in real time, and generates an alarm at the time of injection failure. On the other hand, the injector 32 temporarily stores the molten metal 30 and injects the molten metal 30 into the mold 20 located in the quantitative measurement unit 2. [

The molten metal 30 stored in the injector 32 is injected into the mold 20 or the injection is stopped by opening and closing the blocking member blocking the injection port of the injector 32.

The control unit 4 controls the moving unit 1, the quantitative measurement unit 2 and the injection unit 3 to control the injection of the molten metal 30 into the mold 20, And a data storage 42.

The control unit 41 is connected to the moving unit 1, the quantitative measurement unit 2 and the injection unit 3 and controls the injection of the molten metal 30 by the weight detected by the weight detection sensor 24, And generates an alarm signal for the injection upper limit and the lower limit. On the other hand, data on the injection amount is transmitted to the injector 32, or the injection or non-use of the injection amount is set.

Meanwhile, the controller 41 is connected to the data storage 42 to store real-time injection information and output injection information.

The dosing system 100 as described above operates as follows.

FIG. 5 is a schematic view for measuring whether or not the molten metal is quantitatively measured in the metering system according to the embodiment shown in FIG.

First, the mold 20 made in the molding machine is put on the mold carriage 10 and put into the moving part 1. Fig. By means of the push cylinders, the mold bogie 10 moves a certain distance along the rails 11. In addition, one of the moved mold bobbins 10 is located in the quantification part 2.

Next, the stopper unit 14 of the moving unit 1 is operated to push the mold carriage 10 positioned in front of and behind the mold carriage 10 located in the quantitative measurement unit 2 to be separated from the quantitative measurement unit 2 .

Next, the injection of the molten metal 30 into the mold 20 of the mold carriage 10 located in the quantification part 2 is started by the injection part 3. The injection of the fixed amount is measured by the weight of the molten metal 30 to be injected, and the measurement of the molten metal 30 by the laser and the control by the time are performed in parallel.

At this time, the injection time is measured and it is monitored whether or not the molten metal 30 reaches the target weight and the target level within a predetermined time.

FIG. 6 is a graph illustrating a state in which a quantitative injection is performed in the quantitative injection system according to the embodiment shown in FIG.

The molten metal 30 is temporarily introduced into the mold 20 at the inlet (100% level) when the molten metal 30 is introduced into the mold 20 by opening the blocking member of the injector 32 . At this time, when the blocking member is closed to block the injection, the molten metal 30 injected into the mold 20 enters the mold 20 and the level drops again.

At the set 95% level, the block member is opened again. By this time, the level will be lowered to less than 95%, but if the molten metal (30) comes back in again, it will exceed 95%. At this time, the blocking member is closed again. Repeating this process will converge to a level of 95%.

At this time, the weight of the mold bogie 10 is continuously increased, and when the weight of the mold bogie 10 exceeds the predetermined weight, if the weight detecting sensor 24 detects it, the blocking member is completely closed to stop the injection. Data on the injection amount is displayed through the mass input / output terminal 25 and transmitted to the controller 41 in real time.

If such a process is not performed within a predetermined time, there is a problem with the mold 20, and the operation is stopped because the melt 30 is leaking. Therefore, the operation is stopped and the defective product is collected and discarded.

On the other hand, when the injection amount exceeds the predetermined upper and lower limits, an alarm signal for the upper limit and lower limit can be generated.

Next, when the injection of the molten metal 30 is completed, the push cylinder is operated to move the mold bogie 10 and the molten metal 30 is injected into the mold 20 of the next mold bogie 10.

In this manner, injection control and quantitative control are performed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1:
11: rail 12: table 13: leg
14: stopper unit 141: bracket 142: cylinder 143: pressing member
2: Quantitative measurement unit
21: rail 22: base plate 23: cover table 24: weight sensor
25: Weight input / output terminal
26: level measuring unit 261: light emitter 262:
27: injection time measuring unit
3:
31: injection input / output terminal 32: injector
4:
41: Controller 42: Data storage
10: Mold carriage 10a:
20: mold 30: molten metal 100: metering system

Claims (5)

A moving part on which a rail on which the mold bogie moves is installed,
A metering measuring unit provided separately from the moving unit for measuring the weight of the molten metal injected into the mold of the mold bogie and measuring whether the molten metal is injected into the mold,
An injection unit for injecting the molten metal into the mold positioned in the quantitative measurement unit;
And a controller for controlling the quantitative measurement unit and the injection unit to inject a predetermined amount of molten metal into the mold,
Wherein the quantification measuring unit comprises:
A base plate disposed separately from the moving unit,
A cover table placed on the base plate,
A weight detection sensor interposed between the base plate and the cover table for measuring the weight of the molten metal injected into the mold of the mold carriage,
And a rail on which the mold carriage, which is installed separately from the rail of the moving section and moved from the moving section,
/ RTI >
And a stopper unit for preventing the weight of the adjacent mold bogies from being measured by the quantitative measurement unit by moving the mold bogies adjacent to the mold bogie placed in the quantitative measurement unit away from the quantitative measurement unit
Dosing system. delete The method according to claim 1,
Wherein the stopper unit comprises: a bracket having a hinge point formed thereon; a cylinder coupled to the bracket; and one end coupled to the rod of the cylinder and pivotably coupled to a hinge point of the bracket, And a pushing member for pushing a protrusion formed on the mold bogie. delete The method according to claim 1,
Wherein the metering section includes a level measuring unit for measuring a level of the molten metal and an injection time measuring unit for measuring an injection time of the injection unit, wherein the molten metal reaches a target weight and a target level within a predetermined time in the injection time measuring unit Whether or not monitoring the dosing system.

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