Novel casting machine table furnace

Abstract

The utility model provides a novel casting machine table furnace, which belongs to the technical field of aluminum alloy manufacturing and comprises a furnace body, a pressurizing chamber and two liquid adding standing chambers used for conveying molten aluminum to the pressurizing chamber are arranged in the furnace body, each liquid adding standing chamber is communicated with the pressurizing chamber through a liquid conveying channel, and the liquid conveying channels are communicated with the pressurizing chamber through liquid conveying channels. A control component used for controlling conveying or cutting off of molten aluminum is arranged in the liquid conveying channel, a liquid inlet port, located in the liquid adding standing chamber, of the liquid conveying channel is located above the bottom face of the liquid adding standing chamber, and a liquid inlet distance exists between the liquid inlet port and the bottom face of the liquid adding standing chamber. According to the novel casting machine table furnace, the content of inclusions in molten aluminum input into the pressurizing chamber through the liquid adding standing chamber is greatly reduced, generation and accumulation of the inclusions in the molten aluminum in the pressurizing chamber are reduced, and the quality of castings is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum alloy manufacturing, and more specifically relates to a new type of casting machine furnace. Background Art

[0002] At present, cast aluminum alloy wheels are generally manufactured through low-pressure casting process. The implementation of low-pressure casting process is inseparable from low-pressure casting machines. Existing low-pressure casting machines are equipped with a casting machine furnace, a set of aluminum liquid insulation furnace for the casting machine furnace, and the low-pressure casting machine is fixed on the casting machine furnace. There is a riser pipe connecting the pressure chamber of the casting machine furnace and the mold cavity on the low-pressure casting machine inside the casting machine furnace. When working normally, the pressurized actuator presses compressed gas into the pressure chamber of the casting machine furnace. After the pressure inside the pressure chamber increases, the aluminum liquid flows into the mold cavity through the riser pipe; when the workpiece in the mold is cooled, the exhaust system is opened, the pressure of the casting machine furnace is released, and the aluminum liquid in the riser pipe flows back into the pressure chamber of the casting machine furnace.

[0003] Now more and more customers require the use of a high proportion of recycled aluminum to produce wheels. However, a large number of inclusions are usually mixed in the recycling process of recycled aluminum. At the same time, a large amount of oxidized slag will be produced during the treatment and circulation of molten aluminum. According to the previous K-mold inspection, the quality of molten aluminum in the casting machine furnace is extremely poor, which seriously affects the product quality.

[0004] Eliminating oxide inclusions in castings is a complex problem. Although various methods and measures have been tried, the oxide inclusion defects in castings produced by casting machines cannot be completely solved. According to observation and analysis, the long-term contact of a large area of ​​molten aluminum with compressed air in the pressurized chamber of the casting machine furnace is the main source of oxide generation, and the stirring of the molten aluminum during the process of raising and discharging the liquid creates conditions for the oxide to be drawn into the molten aluminum. Part of the entrapped oxide film is suspended in the molten aluminum, and part of it sinks to the bottom of the furnace after aggregation. Due to the limitations of the furnace structure and process conditions, it is difficult to completely remove these suspended or precipitated oxide inclusions. During the casting process, these inclusions enter the casting with the molten aluminum to form inclusions, resulting in low elongation and excessive variation that exceeds the standard. Utility Model Content

[0005] The utility model aims to provide a novel casting machine furnace, aiming to reduce the inclusions in the aluminum liquid discharged into the pressurized chamber.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a new type of casting machine furnace, including a furnace body, wherein a pressurized chamber and a liquid adding and standing chamber for conveying molten aluminum to the pressurized chamber are arranged in the furnace body, the number of the liquid adding and standing chamber is two, each of the liquid adding and standing chamber is connected to the pressurized chamber through an infusion channel, a control component for controlling the conveying or cutting off of the molten aluminum is arranged in the infusion channel, the liquid inlet port of the infusion channel located in the liquid adding and standing chamber is above the bottom surface of the liquid adding and standing chamber, and there is a liquid inlet distance between the liquid adding and standing chamber and the bottom surface of the liquid adding and standing chamber.

[0007] In a possible implementation, a liquid adding channel is provided on one side of the liquid adding static chamber and is inclined from top to bottom toward the liquid adding static chamber. The upper end of the liquid adding channel passes through the furnace body and is provided with a liquid adding port. The lower end of the liquid adding channel passes through the side wall of the liquid adding static chamber and is connected to the liquid adding static chamber.

[0008] In a possible implementation, a guide groove is connected to the liquid filling port.

[0009] In a possible implementation, the bottom surface of the liquid adding static chamber is arranged to be inclined downward toward a side facing the liquid adding channel, and the liquid inlet port of the liquid infusion channel is located at a side away from the liquid adding channel.

[0010] In a possible implementation, a riser is provided on the furnace body, the upper port of the riser is used to connect to the mold cavity on the low-pressure casting machine, the lower port of the riser is located in the pressurized chamber, and an aluminum liquid filter plate is installed on the lower port of the riser and / or the liquid inlet port of the infusion channel.

[0011] In a possible implementation, a drainage channel is provided on one side of the pressurized chamber and is inclined from top to bottom toward the pressurized chamber. The upper end of the drainage channel passes through the furnace body and is provided with a drainage port. A sealing door is provided on the drainage port. The lower end of the drainage channel passes through the side wall of the pressurized chamber and is connected to the pressurized chamber.

[0012] In a possible implementation, a necking section is provided at the lower end of the drainage channel, the necking section is connected to the bottom of the pressurized chamber, the top of the drainage channel is higher than the top of the pressurized chamber, and a pressurized channel is provided at the top of the drainage channel for guiding compressed gas into the drainage channel.

[0013] In a possible implementation manner, a heating device for the aluminum liquid in the liquid addition and static chamber and / or the pressurizing chamber is provided in the furnace body.

[0014] In a possible implementation manner, the control component is a stopper rod or an electromagnetic pump.

[0015] In a possible implementation, a graphite degassing rod is provided in the pressurized chamber.

[0016] The utility model provides a new type of casting machine furnace with the beneficial effect that: compared with the prior art, the utility model provides a new type of casting machine furnace, on the one hand, two liquid adding static chambers are set to alternately provide aluminum liquid to the pressurizing chamber, so that the static time of each liquid adding static chamber after refining treatment can be extended without affecting normal production, so that the inclusions in the aluminum liquid have sufficient time to settle and accumulate at the bottom of the liquid adding static chamber, thereby reducing the content of suspended inclusions in the aluminum liquid, and on the other hand, the liquid inlet port of the infusion channel is set above the bottom surface of the liquid adding static chamber, and the liquid inlet port of the infusion channel and the bottom surface of the liquid adding static chamber have a certain liquid contact distance, which can prevent the inclusions deposited at the bottom of the liquid adding static chamber from being precipitated into the pressurizing chamber through the infusion channel. In addition, by reducing the volume of the pressurizing chamber, the contact area and contact time between the aluminum liquid in the pressurizing chamber and the compressed air are reduced, and the continuous generation and accumulation of inclusions in the pressurizing chamber are reduced. Through the above three aspects, the inclusion content in the aluminum liquid input into the pressurizing chamber through the liquid addition and static chamber and generated inside the pressurizing chamber can be reduced, so that the inclusion content of the aluminum liquid in the pressurizing chamber is greatly reduced, and the quality of the casting is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a top view of a new type of casting machine furnace provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the main structure of a new type of casting machine furnace provided in an embodiment of the utility model;

[0020] Figure 3 A left-side structural schematic diagram of a new type of casting machine furnace provided in an embodiment of the utility model;

[0021] Figure 4 for Figure 1 The cross-sectional structure diagram along the AA line;

[0022] Figure 5 for Figure 1 The cross-sectional structure diagram of the middle BB line;

[0023] Figure 6 for Figure 1Cross-sectional structural diagram along the CC line.

[0024] Description of reference numerals:

[0025] 1. Furnace body; 2. Pressurizing chamber; 3. Liquid adding and standing chamber; 4. Liquid infusion channel; 5. Liquid discharge channel; 51. Liquid discharge port; 511. Sealing door; 52. Neck section; 6. Liquid adding channel; 61. Liquid adding port; 62. Guide groove; 7. Liquid riser; 8. Pressurizing channel; 9. Stopper rod; 10. Degassing rod; 11. Filtrate filter plate. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] See also Figures 1 to 6Now, a new type of casting machine furnace provided by the utility model is described. The new type of casting machine furnace comprises a furnace body 1, in which a pressurizing chamber 2 and a liquid adding and standing chamber 3 for conveying aluminum liquid to the pressurizing chamber 2 are arranged. There are two liquid adding and standing chambers 3, and each liquid adding and standing chamber 3 is connected to the pressurizing chamber 2 through a liquid infusion channel 4. A control component for controlling the conveying or cutting off of aluminum liquid is arranged in the liquid infusion channel 4. The liquid inlet port of the liquid infusion channel 4 located in the liquid adding and standing chamber 3 is located above the bottom surface of the liquid adding and standing chamber 3 and has a liquid inlet spacing with the bottom surface of the liquid adding and standing chamber 3.

[0031] The utility model provides a new type of casting machine furnace. Compared with the prior art, on the one hand, two liquid adding and standing chambers 3 are provided to alternately provide aluminum liquid to the pressurizing chamber 2. Such a setting can extend the standing time of each liquid adding and standing chamber 3 after refining treatment, so that the inclusions in the aluminum liquid have sufficient time to settle and accumulate at the bottom of the liquid adding and standing chamber 3, thereby reducing the content of suspended inclusions in the aluminum liquid. On the other hand, the liquid inlet port of the infusion channel 4 is arranged above the bottom surface of the liquid adding and standing chamber 3, and a certain liquid inlet distance is provided between the liquid inlet port of the infusion channel 4 and the bottom surface of the liquid adding and standing chamber 3, so that the inclusions deposited at the bottom of the liquid adding and standing chamber 3 can be prevented from settling into the pressurizing chamber 2 through the liquid infusion channel 4. Through the above two aspects, the inclusion content in the aluminum liquid input into the pressurizing chamber 2 through the liquid adding and standing chamber 3 is greatly reduced, so that the quality of the casting is improved.

[0032] In some embodiments, see Figures 1 to 6 A liquid adding channel 6 is provided on one side of the liquid adding static chamber 3 and is inclined from top to bottom toward the liquid adding static chamber 3. The upper end of the liquid adding channel 6 penetrates the furnace body 1 and is provided with a liquid adding port 61. The lower end of the liquid adding channel 6 penetrates the side wall of the liquid adding static chamber 3 and is communicated with the liquid adding static chamber 3. A guide groove 62 is provided at the liquid adding port 61 of the liquid adding channel 6. In this embodiment, the guide groove 62 is detachably connected to the liquid adding port 61. In application, the smelted aluminum liquid is added to the liquid adding static chamber 3 through the liquid adding channel 6. The setting of the guide groove 62 allows the aluminum liquid to flow smoothly when it is poured into the liquid adding static chamber 3, thereby reducing the slag and gas entrainment of the aluminum liquid.

[0033] Optionally, the lower end of the liquid adding channel 6 is connected to the bottom surface of the liquid adding static chamber 3, and the bottom surface of the liquid adding static chamber 3 is inclined downward toward the liquid adding channel 6. In this way, during the static process of the aluminum liquid, inclusions in the aluminum liquid will be affected by gravity and will settle and accumulate on the side of the bottom surface of the liquid adding static chamber 3 close to the liquid adding channel 6. This makes it convenient for operators to clean the accumulated inclusions with the help of the liquid adding channel 6.

[0034] In this example, see Figures 1 to 6The pressurizing chamber 2 is arranged in the middle of the furnace body 1, and the two liquid adding and standing chambers 3 are symmetrically arranged on both sides of the pressurizing chamber 2. The pressurizing chamber 2 and the two liquid adding and standing chambers 3 are spaced by the inner wall of the furnace body 1. The liquid infusion channel 4 is a hole that penetrates the inner wall between the pressurizing chamber 2 and the liquid adding and standing chamber 3 to connect the two chambers. In order to facilitate the transportation of aluminum liquid into the pressurizing chamber 2, the bottom surface of the pressurizing chamber 2 is set lower than the bottom surface of the liquid adding and standing chamber 3. In this embodiment, the liquid inlet port of the liquid infusion channel 4 is arranged on the side away from the liquid adding channel 6. Such a setting can make the liquid inlet port away from the inclusion precipitation accumulated on one side of the liquid adding channel 6, reduce the suction force generated by the liquid inlet port of the liquid infusion channel 4 on the inclusion precipitation during the process of the liquid infusion channel 4 transporting aluminum liquid to the pressurizing chamber 2, and prevent the inclusion precipitation from entering the liquid infusion channel 4.

[0035] In this embodiment, the control component arranged in the infusion channel 4 is a stopper rod 9 or an electromagnetic pump. The stopper rod 9 is a control component commonly used in the prior art. When it is necessary to deliver aluminum liquid to the pressurized chamber 2, the stopper rod 9 is pulled out to connect the infusion channel 4 to the liquid addition static chamber 3 and the pressurized chamber 2, and aluminum liquid can be delivered to the pressurized chamber 2. When the pressurized chamber 2 needs to be pressurized, the stopper rod 9 is plugged to block the infusion channel 4, and the aluminum liquid in the liquid addition chamber can be prevented from flowing back into the liquid addition static chamber 3. When the control component is set as an electromagnetic pump, the electromagnetic pump is arranged in the infusion channel 4, and the delivery of aluminum liquid is achieved by controlling the opening and closing of the electromagnetic pump.

[0036] In this embodiment, a liquid riser 7 is provided on the furnace body 1, and the upper port of the liquid riser 7 is used to connect to the mold cavity on the low-pressure casting machine, and the lower port of the liquid riser 7 is located in the pressurized chamber 2. A liquid aluminum filter plate is inserted on the lower port of the liquid riser 7 and the liquid inlet port of the liquid infusion channel 4. The liquid aluminum input into the pressurized chamber 2 is filtered by installing a liquid aluminum filter plate at the liquid inlet port of the liquid infusion channel 4, thereby reducing the inclusions in the liquid aluminum input into the pressurized chamber 2. By installing a liquid aluminum filter plate at the lower port of the liquid riser 7, the liquid aluminum in the pressurized chamber 2 can be contacted with the compressed gas, and the trace amount of oxide film generated can be filtered once by the liquid aluminum filter plate installed at the lower port of the liquid riser 7, thereby further improving the cleanliness of the liquid aluminum, and further reducing the inclusions in the liquid aluminum entering the mold cavity, thereby improving the quality of the casting.

[0037] In this embodiment, a drainage channel 5 is provided on one side of the pressurized chamber 2 and is inclined from top to bottom toward the pressurized chamber 2. The upper end of the drainage channel 5 passes through the furnace body 1 and is provided with a drainage port 51. The drainage port 51 is provided with a sealing door 511. The lower end of the drainage channel 5 passes through the side wall of the pressurized chamber 2 and is connected with the pressurized chamber 2. The purpose of setting the drainage channel 5 is that when the aluminum body is shut down, the aluminum liquid remaining in the pressurized chamber 2 can be discharged through the drainage channel 5. Optionally, the lower end of the drainage channel 5 is connected to the bottom surface of the pressurized chamber 2, and the bottom surface of the pressurized chamber 2 is inclined downward toward the side of the drainage channel 5. In this way, some inclusions remaining in the aluminum liquid in the pressurized chamber 2 will be precipitated and accumulated on the side of the bottom surface of the liquid adding static chamber 3 close to the drainage channel 5 due to the action of gravity. This makes it convenient for operators to clean up the accumulated inclusions with the help of the drainage channel 5.

[0038] In some embodiments, see Figure 5 A necking section 52 is provided at the lower end of the discharge channel 5, and the necking section 52 is communicated with the bottom of the pressurized chamber 2. The top of the discharge channel 5 is higher than the top of the pressurized chamber 2. A pressurized channel 8 for guiding compressed gas into the discharge channel 5 is provided at the top of the discharge channel 5. Through the above arrangement, when the pressurized chamber 2 is pressurized, the compressed gas only contacts the aluminum liquid in the discharge channel 5, avoiding direct contact between the aluminum liquid and the gas inside the pressurized chamber 2, reducing the oxidation and hydrogen absorption of the aluminum liquid, and ensuring the quality of the aluminum liquid.

[0039] In some embodiments, in order to keep the temperature of the aluminum liquid in the pressurizing chamber 2 and the liquid adding and standing chamber 3 within an appropriate range, a heating device is provided on the furnace body 1 corresponding to the pressurizing chamber 2 and the liquid adding and standing chamber 3, wherein the heating device can be a resistance wire heater or an electromagnetic induction heater. In order to further improve the degassing and slag removal effect of the aluminum liquid, a graphite degassing rod 10 is provided in the liquid adding and standing chamber 3 and the pressurizing chamber 2.

[0040] In addition, in practical applications, in order to further improve the quality of aluminum liquid, the volume of the pressurized chamber 2 is reduced, so that the weight of aluminum liquid that can be accommodated in the pressurized chamber 2 at one time is between 60 and 100 kilograms, and the weight of aluminum liquid that can be accommodated in the liquid addition static chamber 3 is between 600 and 800 kilograms. By setting it in this way, the weight of aluminum liquid that can be accommodated in the pressurized chamber 2 at one time is adapted to the weight of aluminum liquid that can be accommodated in the mold cavity, that is, each time a die casting is performed, aluminum liquid needs to be transported to the pressurized chamber 2 once, so that the dynamic circulation of aluminum liquid in the pressurized chamber 2 can be realized. When the aluminum liquid circulates, it will flush the bottom of the pressurized chamber 2 to avoid the accumulation of slag precipitation at the bottom. In addition, after the volume of the pressurized chamber 2 is reduced, the contact area and contact time between the aluminum liquid and the compressed gas can be greatly reduced, the generation of oxides can be reduced, the source of slag formation can be controlled, the amount of compressed air can be reduced, and the heat loss can be reduced, which greatly reduces energy consumption. Smaller pressurized chambers are easier to seal, the furnace body has higher sealing strength, the pressure is greater during pressurization, the pressure is increased faster, and the pressure is easier to control.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of casting machine furnace, characterized in that: The invention comprises a furnace body (1), wherein a pressurizing chamber (2) and a liquid adding static chamber (3) for conveying aluminum liquid to the pressurizing chamber (2) are arranged in the furnace body (1), the number of the liquid adding static chambers (3) is two, each of the liquid adding static chambers (3) is connected to the pressurizing chamber (2) via a liquid infusion channel (4), the liquid infusion channel (4) is provided with a control component for controlling the conveying or cutting off of aluminum liquid, the liquid inlet port of the liquid infusion channel (4) located in the liquid adding static chamber (3) is located above the bottom surface of the liquid adding static chamber (3), and there is a liquid inlet distance between the liquid infusion channel (4) and the bottom surface of the liquid adding static chamber (3).

2. A new type of casting machine furnace as claimed in claim 1, characterized in that: A liquid adding channel (6) is provided on one side of the liquid adding static chamber (3) and is arranged obliquely from top to bottom toward the liquid adding static chamber (3); the upper end of the liquid adding channel (6) passes through the furnace body (1) and is provided with a liquid adding port (61); the lower end of the liquid adding channel (6) passes through the side wall of the liquid adding static chamber (3) and is in communication with the liquid adding static chamber (3).

3. A new type of casting machine furnace as claimed in claim 2, characterized in that: The liquid adding port (61) is connected to a guide groove (62).

4. A new type of casting machine furnace as claimed in claim 2, characterized in that: The bottom surface of the liquid adding static chamber (3) is arranged to be inclined downward toward the side facing the liquid adding channel (6), and the liquid inlet port of the liquid infusion channel (4) is located on the side away from the liquid adding channel (6).

5. A new type of casting machine furnace as claimed in claim 1, characterized in that: The furnace body (1) is provided with a liquid riser (7), the upper end of the liquid riser (7) is used to connect to the mold cavity on the low-pressure casting machine, the lower end of the liquid riser (7) is located in the pressurized chamber (2), and an aluminum liquid filter plate is inserted on the lower end of the liquid riser (7) and / or the liquid inlet port of the liquid infusion channel (4).

6. A new type of casting machine furnace as claimed in claim 5, characterized in that: A drainage channel (5) is provided on one side of the pressurized chamber (2) and is inclined from top to bottom toward the pressurized chamber (2); the upper end of the drainage channel (5) passes through the furnace body (1) and is provided with a drainage port (51); a sealing door (511) is provided on the drainage port (51); the lower end of the drainage channel (5) passes through the side wall of the pressurized chamber (2) and is in communication with the pressurized chamber (2).

7. A new type of casting machine furnace as claimed in claim 6, characterized in that: The lower end of the drainage channel (5) is provided with a necking section (52), the necking section (52) is connected to the bottom of the pressurized chamber (2), the top of the drainage channel (5) is higher than the top of the pressurized chamber (2), and the top of the drainage channel (5) is provided with a pressurized channel (8) for guiding compressed gas into the drainage channel (5).

8. A new type of casting machine furnace as claimed in claim 1, characterized in that: The furnace body (1) is provided with a heating device for the aluminum liquid in the liquid addition and static chamber (3) and / or the pressurizing chamber (2).

9. A new type of casting machine furnace as claimed in claim 1, characterized in that: The control component is a stopper rod (9) or an electromagnetic pump.

10. A new type of casting machine furnace according to any one of claims 1 to 9, characterized in that: A graphite degassing rod (10) is provided in the pressurized chamber (2).

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