Molten metal automatic quantitative adding equipment for die casting machine and control method of molten metal automatic quantitative adding equipment

Abstract

The invention discloses molten metal automatic quantitative adding equipment for a die casting machine and a control method of the molten metal automatic quantitative adding equipment, and belongs to the technical field of molten aluminum metering devices.The molten metal automatic quantitative adding equipment mainly comprises a molten aluminum storage furnace, a quantitative tank body is installed on the molten aluminum storage furnace, and a liquid outlet is formed in the end, facing the molten aluminum storage furnace, of the quantitative tank body; and a liquid inlet is formed in the other end, facing the molten aluminum storage furnace, of the quantitative tank body, and a double-layer filter screen plate is arranged in the quantitative tank body. According to the aluminum casting die casting device, through the arrangement of the double-layer filter screen plate, impurity particles in molten aluminum can be conveniently filtered in the process of quantitatively adding the molten aluminum, and the situation that the impurity particles in the molten aluminum affect the die casting effect of a casting is advantageously prevented; and the temperature of the molten aluminum launder can be monitored and adjusted in real time in the feeding process, and the situation that molten aluminum is solidified and blocks a pipeline due to the too low temperature is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molten aluminum metering device, in particular to a metal liquid automatic quantitative adding equipment for die casting machine and a control method thereof. BACKGROUND

[0002] The die casting machine is a machine for pressure casting, including hot and cold pressure chambers, and the die casting machine can press the molten metal liquid into the mold under pressure to cool and form a solid metal casting.

[0003] The existing patent CN116900275A discloses a quantitative molten aluminum device and a control method thereof, which solves the problem that the amount of molten aluminum input into the die casting machine is not accurate in the prior art, which can easily lead to poor quality of the die casting and also easily cause waste of molten aluminum. However, there are still the following problems: the molten aluminum does not have a filtering mechanism during the conveying and adding process, and when the molten aluminum is melted or left for a long time, there may be aluminum oxide (Al2O3), magnesium oxide (MgO) and other oxide particles. These small oxide particles have a density similar to that of aluminum and are usually suspended in the molten aluminum, which is difficult to remove by standing. During the pushing process, the valve port is easily blocked, and the temperature detection and temperature regulator are not provided on the drainage pipe during the flow of the molten aluminum at the liquid inlet of the die casting machine. The molten aluminum is easily solidified and blocked in the drainage pipe due to the low temperature, thereby affecting the effect of adding the molten aluminum.

[0004] Therefore, it is necessary to provide a metal liquid automatic quantitative adding equipment for a die casting machine and a control method thereof to solve the above problems.

[0005] It should be noted that the above information disclosed in this background section is only used to understand the background technology of the present application, and therefore, it can contain information that does not constitute prior art. SUMMARY

[0006] Based on the above problems existing in the prior art, the present application solves the problem of providing a metal liquid automatic quantitative adding equipment for a die casting machine and a control method thereof. By setting the double-layer filter screen, it is convenient to filter the impurity particles in the molten aluminum during the quantitative addition of the molten aluminum, which is beneficial to prevent the impurity particles in the molten aluminum from affecting the effect of die casting. By setting the molten aluminum flow groove, temperature sensor and electric heating ring, it is convenient to monitor and adjust the temperature of the molten aluminum flow groove in real time during the feeding process, which is beneficial to prevent the molten aluminum from being solidified and blocked in the pipe due to the low temperature.

[0007] The technical scheme adopted by the present application to solve its technical problems is: an automatic metal liquid quantitative adding device for a die casting machine and a control method thereof, comprising an aluminum liquid storage furnace, a quantitative tank body is installed on the aluminum liquid storage furnace, an outlet is formed at one end of the quantitative tank body in the direction of the aluminum liquid storage furnace, an inlet is formed at the other end of the quantitative tank body in the direction of the aluminum liquid storage furnace, a double-layer filter screen is arranged in the quantitative tank body, the double-layer filter screen is located at the middle part of the spacing between the outlet and the inlet, a scraping plate is slidably arranged in the double-layer filter screen, a boom is fixed on the scraping plate, an aluminum liquid flow groove is arranged at the position of the outlet, an electric heating ring is arranged outside the aluminum liquid flow groove, a temperature sensor is arranged at the middle part of one end of the electric heating ring, a sealing cabin cover is clamped on the quantitative tank body, a hydraulic telescopic rod is arranged at the middle part of the sealing cabin cover, and one end of the hydraulic telescopic rod is fixedly connected with the boom.

[0008] Further, an upper liquid pipe is fixed at the position of the inlet, the upper liquid pipe is connected with one end of the aluminum liquid storage furnace in a penetrating mode, one end of the hydraulic telescopic rod is provided with a water outlet plug, and the other end of the hydraulic telescopic rod is provided with a feeding plug, the feeding plug and the inlet are matched to realize the function of an inlet switch, and the water outlet plug and the outlet are matched to realize the function of an outlet switch.

[0009] Further, a laser liquid level meter is arranged on the sealing cabin cover, a moving plate is fixed on the laser liquid level meter, a screw rod is arranged in the moving plate in a penetrating mode, and one end of the screw rod is rotatably connected with the sealing cabin cover.

[0010] Further, one air inlet pipe is fixedly connected with one end of the sealing cabin cover and one end of the aluminum liquid storage furnace, a first electromagnetic valve is arranged on the air inlet pipe fixed on the sealing cabin cover, a fourth electromagnetic valve is arranged on the air inlet pipe fixed on the aluminum liquid storage furnace, one end of the air inlet pipe fixed on the sealing cabin cover is fixedly connected with two pipelines, a second electromagnetic valve is arranged on the first pipeline and connected with a booster pump, a third electromagnetic valve is arranged on the second pipeline and connected with a vacuum pump, the fourth electromagnetic valve is arranged on the air inlet pipe fixed on the aluminum liquid storage furnace, and one end of the air inlet pipe fixed on the aluminum liquid storage furnace is connected with the booster pump.

[0011] Further, a fixed plate is fixed on the quantitative tank body, a slag collecting box is arranged on the fixed plate, and a slag inlet is formed at the connecting position of the quantitative tank body and the slag collecting box.

[0012] Further, four supporting legs are symmetrically fixed on the quantitative tank body in the direction of the aluminum liquid storage furnace, and the supporting legs are detachably connected with the aluminum liquid storage furnace through bolts.

[0013] Further, the other end of the aluminum liquid flow groove is communicated with a feeding port of the die casting machine, and the scraping plate has an inclination angle of thirty degrees.

[0014] Further, the middle part of the sealing hatch is fixed with a positioning block, a first positioning tenon and a second positioning tenon are respectively fixedly connected to the positioning block, and the boom is connected with the middle part of the positioning block and the middle part of the sealing hatch.

[0015] The application has the advantages that the impurity particles in the aluminum liquid can be filtered during the quantitative addition of the aluminum liquid, the effect of the impurity particles in the aluminum liquid on the pressure casting of the castings can be prevented, and the temperature of the aluminum liquid flow channel can be monitored and adjusted in real time during the feeding process, so that the aluminum liquid is prevented from solidifying and blocking the pipeline due to the excessively low temperature.

[0016] The application provides a metal liquid automatic quantitative adding equipment for a pressure casting machine and a control method thereof, when a predetermined amount of aluminum liquid flows into the quantitative tank, the water outlet plug moves upward to open the liquid outlet, the second electromagnetic valve is opened, the pressure pump inputs air pressure into the quantitative tank, the air pressure pushes the aluminum liquid in the quantitative tank to flow in the direction of the liquid outlet, when the aluminum liquid flows and contacts one end of the double-layer filter screen, the particles and impurities in the aluminum liquid flow into the double-layer filter screen through the holes in the first filter screen, the particles and impurities are retained in the space between the first filter screen and the second filter screen, and the filtered aluminum liquid flows into the opened liquid outlet under the action of the air pressure, passes through the liquid outlet, and enters the aluminum liquid flow channel, so that the impurity particles in the aluminum liquid can be filtered during the quantitative addition of the aluminum liquid, and the effect of the impurity particles in the aluminum liquid on the pressure casting of the castings can be prevented.

[0017] The application provides a metal liquid automatic quantitative adding equipment for a pressure casting machine and a control method thereof, when the aluminum liquid enters the aluminum liquid flow channel, the temperature sensor installed on the aluminum liquid flow channel emits laser light to the aluminum liquid flow channel, the temperature change of the surface of the aluminum liquid flow channel causes the spectrum change of the reflected light, the sensor receives the reflected light, analyzes the spectrum change to determine the sensed temperature data, when the temperature approaches the freezing point, the controller delivers current to the electric heating ring, the heat emitted by the electric heating ring is conducted to the aluminum liquid flow channel, the temperature of the aluminum liquid flow channel is conducted to the aluminum liquid flowing in the aluminum liquid flow channel to warm the aluminum liquid, and the aluminum liquid is prevented from solidifying and blocking the pipeline due to the excessively low temperature during the flowing of the aluminum liquid along the aluminum liquid flow channel to the feeding port of the pressure casting machine, and the temperature of the aluminum liquid flow channel can be monitored and adjusted in real time during the feeding process, so that the aluminum liquid is prevented from solidifying and blocking the pipeline due to the excessively low temperature.

[0018] In addition to the above described objects, features and advantages, the present application has other objects, features and advantages. These will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the present application, and are incorporated by reference herein. The embodiments depicted in the drawings are provided by way of explanation of the present application, and are not meant by way of limitation. In the drawings: Figure 1 Structure diagram of the quantitative molten aluminum device of the present application; Figure 2 Structure diagram of the quantitative molten aluminum device of the present application; Figure 1 Structure diagram of the quantitative molten aluminum device of the present application; Figure 3 Structure diagram of the quantitative molten aluminum device of the present application; Figure 4 Structure diagram of the quantitative molten aluminum device of the present application;

[0020] In the drawings, various elements are labeled the same as in the description. 1, molten aluminum storage furnace; 2, air inlet pipe; 3, quantitative tank; 4, laser liquid level meter; 5, water outlet plug; 6, feeding plug; 7, first electromagnetic valve; 8, molten aluminum flow tank; 9, pressure casting machine feeding port; 10, liquid inlet pipe; 11, liquid outlet; 12, liquid inlet; 13, fourth electromagnetic valve; 14, temperature sensor; 15, sealing cabin cover; 16, positioning block; 17, booster pump; 18, vacuum pump; 19, second electromagnetic valve; 20, third electromagnetic valve; 21, first positioning tenon; 22, second positioning tenon; 23, suspender; 24, double-layer filter screen plate; 25, material scraping plate; 26, slag collection box; 27, fixed plate; 28, supporting leg; 29, electric heating ring. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments and features of the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0023] As Figures 1-4The application provides a metal liquid automatic quantitative adding device for a die casting machine and a control method thereof. The device comprises an aluminum liquid storage furnace 1, a quantitative tank body 3 installed on the aluminum liquid storage furnace 1, a liquid outlet 11 formed at one end of the quantitative tank body 3 towards the aluminum liquid storage furnace 1, a liquid inlet 12 formed at the other end of the quantitative tank body 3 towards the aluminum liquid storage furnace 1, a double-layer filter screen plate 24 arranged in the quantitative tank body 3, the double-layer filter screen plate 24 located at the middle part of the interval between the liquid outlet 11 and the liquid inlet 12, a scraping plate 25 slidably arranged in the double-layer filter screen plate 24, a hanger rod 23 fixed on the scraping plate 25, an aluminum liquid flow groove 8 arranged at the position of the liquid outlet 11, an electric heating ring 29 arranged outside the aluminum liquid flow groove 8, a temperature sensor 14 arranged at the middle part of one end of the electric heating ring 29, a sealing cabin cover 15 clamped on the quantitative tank body 3, a hydraulic telescopic rod arranged at the middle part of the sealing cabin cover 15, one end of the hydraulic telescopic rod fixedly connected with the hanger rod 23, an upper liquid pipe 10 fixed at the position of the liquid inlet 12, the upper liquid pipe 10 penetratingly connected with one end of the aluminum liquid storage furnace 1, a water outlet plug 5 arranged at one end of the hydraulic telescopic rod, a feeding plug 6 arranged at the other end of the hydraulic telescopic rod, the feeding plug 6 matched with the liquid inlet 12 to realize the function of liquid inlet switch, the water outlet plug 5 matched with the liquid outlet 11 to realize the function of liquid outlet switch, one air inlet pipe 2 fixedly connected with one end of the aluminum liquid storage furnace 1 and one end of the sealing cabin cover 15, a first electromagnetic valve 7 arranged on the air inlet pipe 2 fixed on the sealing cabin cover 15, a fourth electromagnetic valve 13 arranged on the air inlet pipe 2 fixed on the aluminum liquid storage furnace 1, two pipes fixedly connected with one end of the air inlet pipe 2 fixed on the sealing cabin cover 15, a second electromagnetic valve 19 arranged on the first pipe and connected with a booster pump 17, a third electromagnetic valve 20 arranged on the second pipe and connected with a vacuum pump 18, the fourth electromagnetic valve 13 arranged on the air inlet pipe 2 fixed on the aluminum liquid storage furnace 1 and connected with the booster pump 17, a fixed plate 27 fixed on the quantitative tank body 3, a slag collecting box 26 arranged on the fixed plate 27, a slag inlet formed at the connecting position of the quantitative tank body 3 and the slag collecting box 26, the other end of the aluminum liquid flow groove 8 communicated with a die casting machine feeding port 9, and the scraping plate 25 has an inclination angle of 30 degrees.

[0024] In this embodiment, the addition of aluminum liquid into the injection port 9 of the die casting machine is that the water outlet plug 5 moves downward to close the liquid outlet 11, the feeding plug 6 moves upward to open the liquid inlet 12, the third electromagnetic valve 20 and the first electromagnetic valve 7 are opened, the vacuum pump 18 is opened to extract the air in the quantitative tank 3, so that the negative pressure generated in the quantitative tank 3 is generated, the suction force generated by the negative pressure will pass through the liquid inlet pipe 10 and the opened liquid inlet 12 to pump the aluminum liquid in the aluminum liquid storage furnace 1 into the quantitative tank 3, the fourth electromagnetic valve 13 is opened, the high-pressure gas is input into the aluminum liquid storage furnace 1 through the air inlet pipe 2 by the booster pump 17, the gas pressure will push the liquid in the aluminum liquid storage furnace 1 to flow into the upper liquid pipe 10 quickly, which is beneficial to improve the speed of the aluminum liquid flowing into the quantitative tank 3 through the upper liquid pipe 10 and the stability of the aluminum liquid flow, when the laser liquid level meter 4 senses that the aluminum liquid in the quantitative tank 3 reaches the predetermined position, the booster pump 17 slows down the speed of the gas pressure delivered into the aluminum liquid storage furnace 1, the vacuum pump 18 slows down the speed of the gas extraction, when the laser liquid level meter 4 senses that the aluminum liquid in the quantitative tank 3 reaches the predetermined position, the fourth electromagnetic valve 13 and the third electromagnetic valve 20 are closed, then the feeding plug 6 moves downward to close the liquid inlet 12, the water outlet plug 5 moves upward to open the liquid outlet 11, the second electromagnetic valve 19 is opened, the gas pressure is input into the quantitative tank 3 by the booster pump 17, the gas pressure will push the aluminum liquid in the quantitative tank 3 to flow in the direction of the liquid outlet 11, when the aluminum liquid flows and contacts one end of the double-layer filter screen plate 24, the particulate impurities in the aluminum liquid will flow into the double-layer filter screen plate 24 through the holes in the first filter plate, the space between the first filter plate and the second filter plate, when the aluminum liquid contacts the second filter plate, the impurities and particulate matter will be retained in the space between the first filter plate and the second filter plate, the filtered aluminum liquid will flow into the opened liquid outlet 11 under the action of the gas pressure, pass through the liquid outlet 11 into the aluminum liquid flow groove 8, when the aluminum liquid enters the aluminum liquid flow groove 8, the temperature sensor 14 installed on the aluminum liquid flow groove 8 emits laser to the aluminum liquid flow groove 8, the temperature change of the surface of the aluminum liquid flow groove 8 will cause the spectrum change of the reflected light, the sensor receives the reflected light and determines the sensed temperature data by analyzing the spectrum change, when the temperature approaches the freezing point, the controller delivers current to the electric heating ring 29, the heat emitted by the electric heating ring 29 will be conducted to the aluminum liquid flow groove 8 under the principle of electromagnetic induction, the temperature of the aluminum liquid flow groove 8 is conducted to the aluminum liquid flowing in the aluminum liquid flow groove 8 to warm the aluminum liquid, which prevents the aluminum liquid from freezing and blocking the pipeline during the process of flowing along the aluminum liquid flow groove 8 to the injection port 9 of the die casting machine, when the aluminum liquid in the quantitative tank 3 flows into the injection port 9 of the die casting machine through the aluminum liquid flow groove 8, the water outlet plug 5 moves downward to close the liquid outlet 11, the feeding plug 6 moves upward to open the liquid inlet 12, a circulation is formed, and the aluminum liquid can be sequentially delivered into the injection port 9 of the die casting machine, when the particulate matter and slag retained in the double-layer filter screen plate 24 reaches the specified amount, the boom 23 fixedly connected to the bottom is retracted into the hydraulic telescopic rod by the hydraulic telescopic rod,Thus drive and draw boom 23 fixed connection with the scraper 25 along the double layer filter screen 24 to the slag into the mouth of the sliding, thus pushing the double layer filter screen 24 in the accumulation of slag to the slag into the mouth of the movement, when the slag into the mouth of the slag, the slag will along the scraper 25 angle of inclination through the slag into the mouth of the fall into the slag collection box 26.

[0025] As Figure 1 , Figure 2 and Figure 4 indicated, the sealing cabin cover 15 is installed with laser liquid level meter 4, the laser liquid level meter 4 is fixed with the moving plate, the moving plate is through the screw rod, one end of the screw rod is rotatably connected with the sealing cabin cover 15, the quantitative tank body 3 is symmetrically fixed with four support legs 28 towards the aluminum liquid storage furnace 1, the support leg 28 is detachably connected with the aluminum liquid storage furnace 1 through the bolt, the middle part of the sealing cabin cover 15 is fixed with the positioning block 16, the positioning block 16 is respectively fixedly connected with one first positioning tenon 21 and one second positioning tenon 22, the boom 23 is through connection with the middle part of the positioning block 16 and the middle part of the sealing cabin cover 15.

[0026] In this embodiment, the height between the bottom of the laser liquid level meter 4 and the inside bottom end of the quantitative tank body 3 is adjusted, the screw rod is rotated, the screw rod will drive the moving plate to linearly move up and slide, thus driving the laser liquid level meter 4 fixedly installed on the moving plate to linearly move up or down a specified distance, completing the height adjustment of the laser liquid level meter 4, the quantitative tank body 3 is installed and fixed on the aluminum liquid storage furnace 1 through the four support legs 28 by the bolt or is detached and moved down from the aluminum liquid storage furnace 1, when installing the double layer filter screen 24, the double layer filter screen 24 is installed and clamped to the positioning block 16 through the first positioning tenon 21 and the second positioning tenon 22, and then is fixed by the high temperature resistant bolt.

[0027] Working principle: The adding of the liquid aluminum into the injection port 9 of the die casting machine is that the water outlet plug 5 moves downward to close the liquid outlet 11, the feeding plug 6 moves upward to open the liquid inlet 12, the third electromagnetic valve 20 and the first electromagnetic valve 7 are opened, the vacuum pump 18 is opened to extract the air in the quantitative tank 3, so that the negative pressure is generated in the quantitative tank 3, the suction force generated by the negative pressure can suck the liquid aluminum in the liquid aluminum storage furnace 1 into the quantitative tank 3 through the liquid inlet pipe 10 and the opened liquid inlet 12, the fourth electromagnetic valve 13 is opened, the high-pressure gas is input into the liquid aluminum storage furnace 1 through the air inlet pipe 2 by the booster pump 17, the gas pressure can push the liquid in the liquid aluminum storage furnace 1 to flow into the liquid inlet pipe 10 quickly, which is beneficial to improve the speed of the liquid aluminum flowing into the quantitative tank 3 through the liquid inlet pipe 10 and the stability of the liquid aluminum flow, when the laser liquid level meter 4 senses that the liquid aluminum in the quantitative tank 3 reaches the predetermined position, the booster pump 17 slows down the speed of the gas pressure delivered into the liquid aluminum storage furnace 1, the vacuum pump 18 slows down the speed of the gas extraction, when the laser liquid level meter 4 senses that the liquid aluminum in the quantitative tank 3 reaches the predetermined position, the fourth electromagnetic valve 13 and the third electromagnetic valve 20 are closed, then the feeding plug 6 moves downward to close the liquid inlet 12, the water outlet plug 5 moves upward to open the liquid outlet 11, the second electromagnetic valve 19 is opened, the gas pressure is input into the quantitative tank 3 by the booster pump 17, the gas pressure can push the liquid aluminum in the quantitative tank 3 to flow in the direction of the liquid outlet 11, when the liquid aluminum flows to contact one end of the double-layer filter screen plate 24, the impurities and particles in the liquid aluminum flow into the double-layer filter screen plate 24 through the holes in the first filter plate, the impurities and particles are retained in the space between the first filter plate and the second filter plate, the filtered liquid aluminum flows into the opened liquid outlet 11 under the action of the gas pressure, passes through the liquid outlet 11 and enters the liquid aluminum flow channel 8, when the liquid aluminum enters the liquid aluminum flow channel 8, the temperature sensor 14 installed on the liquid aluminum flow channel 8 emits laser to the liquid aluminum flow channel 8, the temperature change of the surface of the liquid aluminum flow channel 8 causes the spectrum change of the reflected light, the sensor receives the reflected light and determines the sensed temperature data by analyzing the spectrum change, when the temperature approaches the solidification point, the controller delivers the electric current into the electric heating ring 29, the heat emitted by the electric heating ring 29 is transmitted to the liquid aluminum flow channel 8 under the principle of electromagnetic induction, the temperature of the liquid aluminum flow channel 8 is transmitted to the liquid aluminum flowing in the liquid aluminum flow channel 8 to warm the liquid aluminum, which prevents the liquid aluminum from solidifying and blocking the pipeline during the flowing process of the liquid aluminum along the liquid aluminum flow channel 8, when the liquid aluminum in the quantitative tank 3 flows into the die casting machine injection port 9 through the liquid aluminum flow channel 8, the water outlet plug 5 moves downward to close the liquid outlet 11, the feeding plug 6 moves upward to open the liquid inlet 12, the circulation is formed, and the liquid can be sequentially delivered into the die casting machine injection port 9, when the impurities and residues retained in the double-layer filter screen plate 24 reach the specified amount, the boom 23 fixedly connected to the bottom is retracted into the hydraulic telescopic rod by the hydraulic telescopic rod,Thus, the material scraping plate 25 fixedly connected with the boom 23 slides along the double-layer filter screen 24 to the material residue inlet, thereby pushing the material residue accumulated in the double-layer filter screen 24 to move to the material residue inlet, and when the material residue moves to the material residue inlet, the material residue falls into the material residue collecting box 26 along the inclined angle of the material scraping plate 25.

[0028] The above only provides the preferred embodiments of the present application and is not used to limit the present application. Various modifications and changes can be made by those skilled in the art based on the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic quantitative addition device for molten metal in a die-casting machine and a control method thereof, comprising an aluminum liquid storage furnace (1), characterized in that: A quantitative tank body (3) is installed on the aluminum liquid storage furnace (1), and a liquid outlet (11) is provided at one end of the quantitative tank body (3) facing the aluminum liquid storage furnace (1), and a liquid inlet (12) is provided at the other end of the quantitative tank body (3) facing the aluminum liquid storage furnace (1). A double-layer filter screen (24) is provided in the quantitative tank body (3), and the double-layer filter screen (24) is located in the middle of the distance between the liquid outlet (11) and the liquid inlet (12). A scraper plate (25) is provided for internal sliding, a suspension rod is fixed on the scraper plate (25), an aluminum liquid flow trough (8) is provided at the position of the liquid outlet (11), an electric heating ring (29) is provided outside the aluminum liquid flow trough (8), a temperature sensor (14) is installed in the middle of one end of the electric heating ring (29), a sealing hatch (15) is clamped on the quantitative tank body (3), a hydraulic telescopic rod is installed in the middle of the sealing hatch (15), and one end of the hydraulic telescopic rod is fixedly connected to the suspension rod (23).

2. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: An upper liquid pipe (10) is fixed at the position of the liquid inlet (12), and the upper liquid pipe (10) is connected to one end of the aluminum liquid storage furnace (1). A water outlet plug (5) is provided at one end of the hydraulic telescopic rod, and a loading plug (6) is provided at the other end of the hydraulic telescopic rod. The loading plug (6) cooperates with the liquid inlet (12) to realize the function of a liquid inlet switch, and the water outlet plug (5) cooperates with the liquid outlet (11) to realize the function of a liquid outlet switch.

3. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: A laser level meter (4) is mounted on the sealed hatch cover (15), a movable plate is fixed on the laser level meter (4), a screw rod passes through the movable plate, and one end of the screw rod is rotatably connected to the sealed hatch cover (15).

4. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: One end of the sealed hatch cover (15) and one end of the aluminum liquid storage furnace (1) are both fixedly connected to an air intake pipe (2); a first solenoid valve (7) is installed on the air intake pipe (2) fixed on the sealed hatch cover (15); a fourth solenoid valve (13) is installed on the air intake pipe (2) fixed on the aluminum liquid storage furnace (1); one end of the air intake pipe (2) fixed on the sealed hatch cover (15) is fixedly connected to two pipes, the first pipe being provided with a second solenoid valve (19) and connected to a booster pump (17); the second pipe being provided with a third solenoid valve (20) and connected to a vacuum pump (18); a fourth solenoid valve (13) is installed on the air intake pipe (2) fixed on the aluminum liquid storage furnace (1), and one end of the air intake pipe (2) fixed on the aluminum liquid storage furnace (1) is connected to the booster pump (17).

5. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: A fixing plate (27) is fixed on the quantitative tank body (3), a slag collecting box (26) is mounted on the fixing plate (27), and a slag inlet is provided at the connection position between the quantitative tank body (3) and the slag collecting box (26).

6. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: Four supporting legs (28) are symmetrically fixed to the quantitative tank body (3) in a direction toward the aluminum liquid storage furnace (1), and the supporting legs (28) are detachably connected to the aluminum liquid storage furnace (1) via bolts.

7. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: The other end of the aluminum liquid flow trough (8) is connected to the injection port (9) of the die-casting machine, and the scraper plate (25) has an inclination angle of thirty degrees.

8. The automatic quantitative addition device for molten metal for a die casting machine and the control method thereof according to claim 1, characterized in that: A positioning block (16) is fixed in the middle of the sealed hatch cover (15), and a first positioning tenon (21) and a second positioning tenon (22) are fixedly connected to the positioning block (16), respectively. The suspension rod (23) is connected through the middle of the positioning block (16) and the middle of the sealed hatch cover (15).

9. A control method for an automatic quantitative addition device for molten metal in a die-casting machine, applied to the automatic quantitative addition device for molten metal in a die-casting machine according to claims 1 to 8, characterized in that: The steps of filtering and adding the molten metal include: S1. When a predetermined amount of aluminum liquid flows into the quantitative tank body (3), the water outlet plug (5) moves upward to open the liquid outlet (11), and the second solenoid valve (19) is opened. The booster pump (17) inputs air pressure into the quantitative tank body (3). The air pressure pushes the aluminum liquid in the quantitative tank body (3) to flow in the direction of the liquid outlet (11). When the aluminum liquid flows and contacts one end of the double-layer filter screen (24), the particulate matter and impurities in the aluminum liquid will flow through the holes on the first filter screen and into the space between the first filter screen and the second filter screen. When the aluminum liquid contacts the second filter screen, the impurities and particulate matter will be retained in the space between the first filter screen and the second filter screen. The filtered aluminum liquid will flow into the opened liquid outlet (11) under the action of air pressure, and pass through the liquid outlet (11) into the aluminum liquid flow channel (8); S2. When the aluminum liquid enters the aluminum liquid flow trough (8), the laser emitted by the temperature sensor (14) installed on the aluminum liquid flow trough (8) irradiates the aluminum liquid flow trough (8). The temperature change on the surface of the aluminum liquid flow trough (8) will cause the spectrum of the reflected light to change. The sensor receives the reflected light and determines the induced temperature data by analyzing the change in the spectrum. When the temperature approaches the solidification point, the controller transmits current to the electric heating ring (29). Under the principle of electromagnetic induction, the heat emitted by the electric heating ring (29) will be transferred to the aluminum liquid flow trough (8). The temperature is transferred to the aluminum liquid flowing in the aluminum liquid flow trough (8) through the aluminum liquid flow trough (8) to heat the aluminum liquid, thereby preventing the aluminum liquid from cooling down and solidifying and blocking the pipeline during the process of flowing along the aluminum liquid flow trough (8) to the die casting machine injection port (9). When all the aluminum liquid in the quantitative tank (3) flows into the die casting machine injection port (9) through the aluminum liquid flow trough (8), the heat is transferred to the aluminum liquid flowing in the aluminum liquid flow trough (8).

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