A continuous die casting device and method for non-ferrous metal production

Abstract

The application discloses a kind of continuous die casting device and method for non-ferrous metal production, it is related to non-ferrous metal die casting equipment technical field;And the present application includes main body frame, spiral feeding device, cooling bin and expansion board, the spiral feeding device and cooling bin are respectively fixedly installed in main body frame top, main body frame middle part is fixedly installed with expansion board, cooling bin is equipped with extrusion die, cooling drive circulating component and air cooling drive component are equipped in extrusion die, main body frame top is equipped with external spiral spray cooling component away from spiral feeding device side;The application is cooled by setting cooling drive circulating component, utilizes the cooperation of circulating return heat dissipation pipe and spiral heat dissipation pipe, constructs multistage water cooling circulation system, realizes the synchronous cooling of inner cylinder and outer cylinder, effectively improves cooling uniformity, simultaneously, circulating return heat dissipation pipe can be cooled to air cylinder in cooling liquid circulation process, reduces exhaust air temperature.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal die-casting equipment technology, specifically to a continuous die-casting apparatus and method for non-ferrous metal production. Background Technology

[0002] Continuous die casting in non-ferrous metal production refers to the process of continuously injecting molten non-ferrous metals such as aluminum, copper, and magnesium into a molding die under pressure, so that the molten metal is continuously drawn out while filling the die, solidifying, and being continuously pulled out, thereby producing long-sized products such as bars, tubes, and profiles without interruption. In the continuous die casting production of non-ferrous metal pipes, rapid cooling and crystallization of molten metal within the mold is crucial for ensuring the pipe's density, dimensional accuracy, and surface quality. Existing continuous die casting equipment generally suffers from low cooling efficiency, often employing single-sided water cooling or simple spray cooling. This makes it difficult to achieve synchronous and uniform cooling of the inner and outer walls of the pipe, easily leading to excessive differences in cooling rates between the inside and outside. This results in uneven crystallization, high internal stress, and defects such as deformation, cracks, and wall thickness deviations. Furthermore, after pipe forming, secondary cooling via spraying is required. Traditional methods only provide simple spraying to the outer wall. After continuous extrusion forming, the inner wall still retains significant heat. Single-spray cooling of only the outer wall leads to large differences in cooling rates between the inside and outside, easily causing uneven cooling and excessive temperature differences. To address these issues, the inventors propose a continuous die casting device and method for non-ferrous metal production to solve these problems. Summary of the Invention

[0003] To address the problems of low overall cooling efficiency, asynchronous cooling of the inner and outer walls of the pipe, and the lack of coordinated cooling in the single spray cooling method during continuous die casting, the present invention aims to provide a continuous die casting apparatus and method for non-ferrous metal production.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a continuous die-casting device for non-ferrous metal production, comprising a main frame, a screw feeder, a cooling chamber, and an extension plate. The screw feeder and the cooling chamber are respectively fixedly installed on the top of the main frame. An extension plate is fixedly installed in the middle of the main frame. An extrusion die is provided in the cooling chamber. A cooling drive circulation component and a wind-powered heat dissipation drive component are provided in the extrusion die. An external screw spray heat dissipation component is provided on the side of the top of the main frame away from the screw feeder. A water tank is provided on the side of the top of the main frame near the extension plate. The extrusion mold includes a fixed inner frame, which is fixedly installed in the middle of the inner wall of the cooling chamber by a support. One end of the fixed inner frame gradually tapers into a cone shape. An inner cylinder is fixedly installed at the end of the fixed inner frame. A duct is sealed to the middle of the inner cylinder by a flange. Four splicing frames are fixedly fitted on the outer wall of the fixed inner frame, and the four splicing frames form a cylindrical structure. An outer cylinder is sealed to the end of the inner cylinder away from the screw feeder by a flange, and the end of the outer cylinder is fixedly connected to the cooling chamber. A conical cylinder corresponding to the conical end of the fixed inner frame is sealed to the end of the inner cylinder near the screw feeder by a flange, and the conical cylinder is connected to the discharge end of the screw feeder. The cooling drive circulation assembly includes a liquid distribution ring, which is fixedly installed on the inner wall of the fixed inner frame via a support. Several annularly arrayed circulating reflux heat dissipation pipes are sealed and connected to the end of the liquid distribution ring. An inlet pipe and an outlet pipe are respectively connected to the inlet and outlet ends of the liquid distribution ring. Two sets of spiral heat dissipation pipes are sleeved on the outer wall of the outer cylinder. A secondary liquid inlet distributor and an outlet confluencer are fixedly installed on the inner wall of the cooling chamber. An inlet pipe is connected to the inlet end of the secondary liquid inlet distributor, and an outlet pipe is connected to the outlet end of the outlet confluencer. The inlet ends of the inlet pipe and the spiral heat dissipation pipes are connected to the outlet ends of the secondary liquid inlet distributor, and the outlet ends of the outlet pipe and the spiral heat dissipation pipes are connected to the inlet ends of the outlet confluencer. A drive housing symmetrically distributed with the drive fan housing is fixedly installed at the top of the expansion plate, and the driven shaft is rotatably connected to the drive housing. A drive shaft is rotatably mounted on the top, and the drive shaft and driven shaft are arranged symmetrically vertically. The drive shaft and driven shaft are connected by meshing gears of the same module. Rotors are fixedly sleeved on the outer walls of both the drive shaft and driven shaft, and the two rotors rotate inside the drive housing. The drain end and the inlet end of the drive housing are respectively connected by a drain pipe and a drain pipe. The drain pipe is connected to the bottom of the water tank. A main inlet distributor is fixedly mounted on one side of the top of the expansion plate. The drain pipe is connected to the inlet end of the main inlet distributor through a one-way valve. The main inlet distributor has two drain ends. The inlet pipe is connected to one of the drain ends. The drain end of the inlet pipe is also connected to a distributor pipe, and the other end of the distributor pipe is connected to the inlet end of the fixed inlet frame. A drive motor is fixedly mounted on the top of the expansion plate near the drive shaft, and the drive end of the drive motor is connected to the drive shaft through a coupling. Preferably, the wind power cooling drive assembly includes a drive housing and a driven shaft. The drive housing is fixedly installed on the top of the expansion plate. The driven shaft is rotatably installed in the middle of the drive housing via a bearing. An impeller is fixedly installed at the end of the driven shaft. The exhaust end of the drive housing is sealed with a guide pipe via a flange, and the other end of the guide pipe is connected to the air duct. The end of the air duct has six inclined exhaust holes arranged in a ring array.

[0005] Preferably, the external spiral spray cooling assembly includes a base and a fixed liquid inlet frame. The base is fixedly installed on the main frame by bolts, and the fixed liquid inlet frame is fixedly installed on the top of the base. A rotating inner frame is rotatably connected to the inner wall of the fixed liquid inlet frame. Six atomizing nozzles arranged in a ring array are fixedly installed on the inner wall of the rotating inner frame. A rotating shaft is rotatably installed on the top of the base through a bearing seat. A drive gear is fixedly installed at the end of the rotating shaft. A toothed ring is fixedly sleeved on the outer wall of the rotating inner frame, and the drive gear meshes with the toothed ring. A servo motor is fixedly installed on the top of the base near the rotating shaft, and the drive end of the servo motor is connected to the rotating shaft through a coupling.

[0006] Preferably, the inner side of the circulating reflux heat dissipation pipe is fixedly connected to the outer wall of the air duct through a metal frame, the outer side of the circulating reflux heat dissipation pipe is fixedly connected to the inner wall of the outer cylinder through a metal frame, and the spiral heat dissipation pipe is fixedly connected to the outer wall of the outer cylinder through a metal frame.

[0007] A method used in a continuous die-casting apparatus for non-ferrous metal production includes the following steps: S1. First, control the start of the drive motor. The drive motor drives the driven shaft to rotate synchronously through the drive shaft, so that the rotor in the drive housing forms a stable pumping pressure, and sends the cooling water in the water tank into the drive housing through the discharge pipe, and then stably delivers it to the main liquid inlet distributor through the discharge pipe, completing the pre-start of the cooling water circulation. S2. After the cooling water is evenly distributed by the main inlet distributor, one path enters the secondary inlet distributor through the inlet pipe and is then delivered to the circulating reflux heat dissipation pipe and the spiral heat dissipation pipe on the outer wall of the outer cylinder, so as to achieve synchronous and efficient cooling of the inner and outer walls of the extrusion die. The cooling water that has been heated after absorbing heat is collected into the outlet distributor and discharged into the external cooling tower for cooling treatment before being recycled. S3. During the rotation of the driven shaft, the impeller is driven to rotate at high speed to generate airflow. The airflow is introduced into the air duct through the air guide pipe and forms a spiral airflow through the inclined exhaust hole at the end of the air duct to assist in air cooling of the inner wall of the aluminum liquid forming, while breaking the airflow stagnation on the inner wall of the aluminum tube after cooling and forming. S4. The molten aluminum is continuously extruded and conveyed by the screw feeder, smoothly enters the conical cylinder, and flows into the cavity formed between the inner and outer cylinders. Under the combined cooling effect inside and outside the mold, it cools down and solidifies, gradually forming an aluminum tube blank and continuing to be extruded forward. S5. The servo motor drives the inner frame to rotate at low speed, so that the atomizing nozzle forms a spiral atomizing spray in the same direction as the internal spiral airflow, which performs secondary uniform cooling on the outer wall of the extruded aluminum tube blank, and completes continuous die casting.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, by setting up a cooling drive circulation component, utilizes the combination of circulating folding heat dissipation pipes and spiral heat dissipation pipes to construct a multi-stage water cooling circulation system, thereby achieving synchronous cooling of the inner and outer cylinders and effectively improving cooling uniformity. At the same time, the circulating folding heat dissipation pipes can simultaneously cool the air duct during the coolant circulation process, reducing the temperature of the exhaust airflow and further ensuring the stability and reliability of the multiple cooling effects. 2. This invention sets up a wind-powered heat dissipation drive component, which uses an impeller and an inclined exhaust hole to form a spiral airflow rotating along the inner wall of the aluminum tube, thereby achieving auxiliary air cooling on the basis of water cooling, breaking the airflow stagnation on the inner wall, and further improving the overall cooling efficiency and cooling uniformity. 3. This invention achieves secondary uniform cooling of the outer wall of the aluminum tube blank by setting an external spiral spray heat dissipation component and using rotating atomized spray in the same direction as the internal spiral airflow, thus overcoming the limitations of single spray cooling. The consistent rotation direction of the inner and outer spirals allows the inner and outer cooling media to work synergistically in the same direction, avoiding mutual interference and disturbance between the airflow and the spray water flow, making the circumferential temperature distribution of the aluminum tube blank more uniform and effectively reducing the internal stress caused by uneven cooling. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the overall side profile of the present invention; Figure 3 This is a schematic diagram of the side profile of the extrusion die in this invention; Figure 4 This is a schematic diagram of the structure of the outer cylinder and the spiral heat dissipation pipe in this invention; Figure 5 This is a schematic diagram of the unfolded structure of the fixed inner frame and splicing frame in this invention; Figure 6 This is a schematic diagram of the overall distribution structure of the circulating heat sink and the spiral heat sink in this invention; Figure 7 This is a schematic diagram of the side-section structure of the drive housing in this invention; Figure 8 This is a schematic diagram of the overall transmission structure of the cooling drive circulation component and the wind power heat dissipation drive component in this invention; Figure 9 This is a schematic diagram of the transversely split structure of the external spiral spray heat dissipation component in this invention; Figure 10 This is a schematic diagram of the structure of the air duct and the inclined exhaust port in this invention; Figure 11 for Figure 2 Enlarged structural diagram at point A; Figure 12 for Figure 2 Enlarged schematic diagram of the structure at point B.

[0011] In the diagram: 1. Main frame; 2. Screw feeder; 3. Cooling chamber; 4. Expansion plate; 5. Extrusion die; 501. Fixed inner frame; 502. Inner cylinder; 503. Air duct; 504. Splicing frame; 505. Outer cylinder; 506. Conical cylinder; 6. Cooling drive circulation assembly; 601. Liquid diverting ring; 602. Circulating reflux heat dissipation pipe; 603. Liquid inlet pipe; 604. Liquid outlet pipe; 605. Spiral heat dissipation pipe; 606. Secondary liquid inlet diverter; 607. Liquid outlet merging device; 608. Inlet pipe; 609. Outlet pipe; 610. Drive housing; 611. 612. Drive shaft; 613. Rotor; 614. Main liquid inlet distributor; 615. Discharge pipe; 616. Inlet pipe; 617. Drive motor; 7. Wind-powered cooling drive assembly; 701. Drive fan housing; 702. Driven shaft; 703. Impeller; 704. Air guide pipe; 705. Inclined exhaust port; 8. External spiral spray cooling assembly; 801. Base; 802. Fixed liquid inlet outer frame; 803. Rotating inner frame; 804. Atomizing nozzle; 805. Rotating shaft; 806. Drive gear; 807. Gear ring; 808. Servo motor; 9. Water tank. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Example: Figure 1-12 As shown, the present invention provides a technical solution: a continuous die-casting device for non-ferrous metal production, comprising a main frame 1, a screw feeder 2, a cooling chamber 3, and an extension plate 4. The screw feeder 2 and the cooling chamber 3 are respectively fixedly installed at the top of the main frame 1. The extension plate 4 is fixedly installed in the middle of the main frame 1. An extrusion die 5 is provided inside the cooling chamber 3. A cooling drive circulation component 6 and a wind-powered heat dissipation drive component 7 are provided inside the extrusion die 5. An external screw spray heat dissipation component 8 is provided on the side of the top of the main frame 1 away from the screw feeder 2. A water tank 9 is provided on the side of the top of the main frame 1 near the extension plate 4. The extrusion die 5 includes a fixed inner frame 501, which is fixedly installed in the middle of the inner wall of the cooling chamber 3 by a support. One end of the fixed inner frame 501 gradually tapers into a cone shape. An inner cylinder 502 is fixedly installed at the end of the fixed inner frame 501. A duct 503 is sealed to the middle of the inner cylinder 502 by a flange. Four splicing frames 504 are fixedly fitted on the outer wall of the fixed inner frame 501, and the four splicing frames 504 form a cylindrical structure. An outer cylinder 505 is sealed to the end of the inner cylinder 502 away from the screw feeder 2 by a flange. The end of the outer cylinder 505 is fixedly connected to the cooling chamber 3. A conical cylinder 506 corresponding to the conical end of the fixed inner frame 501 is sealed to the end of the inner cylinder 502 near the screw feeder 2 by a flange. The conical cylinder 506 is connected to the discharge end of the screw feeder 2. By adopting the above technical solution, the fixed inner frame 501, inner cylinder 502, four splicing frames 504, outer cylinder 505 and conical cylinder 506 form a stable aluminum liquid forming cavity, while providing a reliable installation foundation for the cooling drive circulation assembly 6 and the wind power heat dissipation drive assembly 7.

[0014] The cooling drive circulation assembly 6 includes a liquid distribution ring 601, which is fixedly installed on the inner wall of the fixed inner frame 501 by a support. The end of the liquid distribution ring 601 is sealed and connected to a number of circulating folding heat dissipation pipes 602 distributed in a ring array. The liquid inlet end and the liquid outlet end of the liquid distribution ring 601 are respectively connected to an inlet pipe 603 and an outlet pipe 604. The outer wall of the outer cylinder 505 is fitted with two sets of spiral heat dissipation pipes 605. By adopting the above technical solution, the inner and outer walls of the molding cavity are simultaneously water-cooled by the cyclic folding heat dissipation pipe 602 and the two sets of spiral heat dissipation pipes 605 working together, thereby improving cooling efficiency and cooling uniformity.

[0015] The wind-powered cooling drive assembly 7 includes a drive housing 701 and a driven shaft 702. The drive housing 701 is fixedly installed on the top of the expansion plate 4. The driven shaft 702 is rotatably installed in the middle of the drive housing 701 via a bearing. An impeller 703 is fixedly installed at the end of the driven shaft 702. The exhaust end of the drive housing 701 is sealed with a guide pipe 704 via a flange, and the other end of the guide pipe 704 is connected to the air duct 503. The end of the air duct 503 is provided with six inclined exhaust holes 705 arranged in a ring array.

[0016] By adopting the above technical solution, the airflow discharged through the inclined exhaust hole 705 can form a spiral airflow along the inner wall of the aluminum tube, thereby achieving auxiliary air cooling and heat dissipation, avoiding airflow stagnation on the inner wall, and further improving cooling uniformity.

[0017] The external spiral spray heat dissipation assembly 8 includes a base 801 and a fixed liquid inlet outer frame 802. The base 801 is fixedly installed on the main frame 1 by bolts. The fixed liquid inlet outer frame 802 is fixedly installed on the top of the base 801. A rotating inner frame 803 is rotatably connected to the inner wall of the fixed liquid inlet outer frame 802. Six atomizing nozzles 804 arranged in a ring array are fixedly installed on the inner wall of the rotating inner frame 803. A rotating shaft 805 is rotatably installed on the top of the base 801 through a bearing seat. A drive gear 806 is fixedly installed at the end of the rotating shaft 805. A toothed ring 807 is fixedly sleeved on the outer wall of the rotating inner frame 803, and the drive gear 806 and the toothed ring 807 mesh with each other.

[0018] By adopting the above technical solution, the atomizing nozzle 804 is connected to the drain end of the rotating inner frame 803 through a conduit, driving the rotation direction of the rotating inner frame 803 to be consistent with the spiral direction of the internal spiral airflow, so that the cooling water is sprayed in a spiral shape on the outer wall of the aluminum tube blank after atomization, forming a synergistic cooling effect with the internal spiral airflow.

[0019] A secondary liquid inlet distributor 606 and a liquid outlet confluencer 607 are fixedly installed on the inner wall of the cooling chamber 3. The liquid inlet end of the secondary liquid inlet distributor 606 is connected to the inlet pipe 608, and the liquid outlet end of the liquid outlet confluencer 607 is connected to the outlet pipe 609. The liquid inlet ends of the liquid inlet pipe 603 and the spiral heat dissipation pipe 605 are connected to the liquid outlet end of the secondary liquid inlet distributor 606, and the liquid outlet ends of the liquid outlet pipe 604 and the spiral heat dissipation pipe 605 are connected to the liquid inlet end of the liquid outlet confluencer 607.

[0020] By adopting the above technical solutions, centralized distribution and convergence of cooling water can be achieved, ensuring balanced pressure and flow in each cooling pipeline and stable operation of the cooling system.

[0021] The top of the expansion plate 4 is fixedly installed with a drive housing 610 that is symmetrically distributed with the drive fan housing 701. The driven shaft 702 is rotatably connected to the drive housing 610. The drive shaft 611 is rotatably installed on the drive housing 610. The drive shaft 611 and the driven shaft 702 are arranged symmetrically up and down. The drive shaft 611 and the driven shaft 702 are connected by a gear of the same module that meshes with each other. The outer walls of the drive shaft 611 and the driven shaft 702 are both fixedly fitted with rotors 612, and the two rotors 612 rotate inside the drive housing 610.

[0022] By adopting the above technical solution, the dual rotors 612, in conjunction with gear transmission, form a stable pumping power, ensuring the stability of coolant delivery, while simultaneously using the same drive source to synchronously drive the wind-powered cooling drive component 7 to operate synchronously.

[0023] The drive housing 610 has a discharge pipe 615 and an inlet pipe 616 that are connected to the discharge end and the inlet end respectively. The inlet pipe 616 is connected to the bottom of the water tank 9.

[0024] By adopting the above technical solutions, a complete cooling water intake channel is constructed to ensure a continuous and stable supply of cooling water, providing a basic guarantee for circulating cooling.

[0025] A main liquid inlet distributor 613 is fixedly installed on one side of the top of the expansion plate 4, and the discharge pipe 615 is connected to the inlet end of the main liquid inlet distributor 613 through a one-way valve. The main inlet diverter 613 has two drain ends. The inlet pipe 608 is connected to one of the drain ends. The drain end of the inlet pipe 608 is also connected to the diverter pipe 614, and the other end of the diverter pipe 614 is connected to the inlet end of the fixed inlet frame 802.

[0026] By adopting the above technical solution, cooling water is supplied in separate streams to mold cooling and external spray cooling, realizing a single power system driving multi-stage cooling.

[0027] A servo motor 808 is fixedly installed on the top of the base 801 near the rotating shaft 805, and the drive end of the servo motor 808 is connected to the rotating shaft 805 through a coupling.

[0028] By adopting the above technical solution, the servo motor 808 drives the rotating shaft 805 to rotate stably.

[0029] A drive motor 617 is fixedly installed on the top of the expansion plate 4 near the drive shaft 611, and the drive end of the drive motor 617 is connected to the drive shaft 611 via a coupling.

[0030] By adopting the above technical solution, the drive motor 617 drives the drive shaft 611 to rotate stably.

[0031] The inner side of the circulating reflux heat dissipation pipe 602 is fixedly connected to the outer wall of the air duct 503 through a metal frame, the outer side of the circulating reflux heat dissipation pipe 602 is fixedly connected to the inner wall of the outer cylinder 505 through a metal frame, and the spiral heat dissipation pipe 605 is fixedly connected to the outer wall of the outer cylinder 505 through a metal frame.

[0032] By adopting the above technical solution, the circulating heat sink 602 and the spiral heat sink 605 are reliably fixed by the metal frame, and the heat conduction is enhanced by the metal frame to improve the overall heat dissipation efficiency.

[0033] A method used in a continuous die-casting apparatus for non-ferrous metal production includes the following steps: S1. First, control the start of drive motor 617. Drive motor 617 drives driven shaft 702 to rotate synchronously through drive shaft 611, so that rotor 612 in drive housing 610 forms stable pumping pressure, and sends cooling water in water tank 9 into drive housing 610 through discharge pipe 616, and then stably delivers it to main liquid inlet distributor 613 through discharge pipe 615, completing the pre-start of cooling water circulation. S2. After the cooling water is evenly distributed by the main inlet distributor 613, one path enters the secondary inlet distributor 606 through the inlet pipe 608, and is respectively delivered to the circulating return heat dissipation pipe 602 and the spiral heat dissipation pipe 605 on the outer wall of the outer cylinder 505, so as to achieve synchronous and efficient cooling of the inner and outer walls of the extrusion die 5; the cooling water that has absorbed heat and heated up is collected into the outlet confluence device 607, discharged into the external cooling tower for cooling treatment and then recycled; S3. During the rotation of the driven shaft 702, the impeller 703 is driven to rotate at high speed to generate airflow. The airflow is introduced into the air duct 503 through the air guide pipe 704 and forms a spiral airflow through the inclined exhaust hole 705 at the end of the air duct 503 to assist in air cooling of the inner wall of the aluminum liquid forming, and at the same time break the airflow stagnation on the inner wall of the aluminum tube after cooling and forming. S4. The molten aluminum is continuously extruded and conveyed by the screw feeder 2, smoothly enters the conical cylinder 506, and flows into the cavity formed between the inner cylinder 502 and the outer cylinder 505. Under the synergistic cooling effect inside and outside the mold, it cools down and solidifies, gradually forming an aluminum tube blank and continuing to be extruded forward. S5. The servo motor 808 drives the rotating inner frame 803 to rotate at low speed, so that the atomizing nozzle 804 forms a spiral atomizing spray in the same direction as the internal spiral airflow, which performs secondary uniform cooling on the outer wall of the extruded aluminum tube blank, and completes continuous die casting.

[0034] Working principle: This device is mainly suitable for continuous die casting of aluminum tubes. Since most commonly used non-ferrous metals can be melted into liquid after being heated to a certain temperature, this device can not only be used for aluminum production, but also for the continuous die casting production of various molten non-ferrous metal tubes.

[0035] In actual production, the molten aluminum is first supplied and pressurized. The molten aluminum is continuously fed by the screw feeder 2, and a stable conveying pressure is formed under the pushing action of the screw, allowing the molten aluminum to smoothly enter the conical cylinder 506. It then flows into the forming cavity between the inner cylinder 502 and the outer cylinder 505, providing a continuous and stable raw material supply for continuous die casting. Simultaneously, the drive motor 617 is started. The drive motor 617 drives the drive shaft 611 to rotate stably via a coupling. The drive shaft 611 drives the driven shaft 702 to rotate synchronously in the opposite direction via meshing gears of the same module. The driving shaft 611 and the driven shaft 702 drive the corresponding rotors 612 to rotate. The two rotors 612 work together to form a stable pumping pressure, which draws the cooling water in the water tank 9 into the drive housing 610 through the discharge pipe 616 and pressurizes it. The pressurized cooling water is then transported to the main inlet distributor 613 through the discharge pipe 615 for diversion. One stream of cooling water enters the secondary inlet distributor 606 through the inlet pipe 608. After being diverted again, it is sent to the inlet pipe 603 and the external spiral heat dissipation pipe 605 respectively. The other stream of cooling water is directly transported to the fixed inlet frame 802 through the distributor pipe 614.

[0036] The coolant entering the inlet pipe 603 is evenly distributed to each circulating and reversing heat dissipation pipe 602 after converging at the inlet end of the liquid distribution ring 601. The coolant in the circulating and reversing heat dissipation pipe 602 first flows along the inner side of the air duct 503 towards the end of the molding cavity, pre-cooling the outer wall of the air duct 503 during the conveying process, reducing the airflow temperature inside the air duct 503. After being conveyed to the end of the circulating and reversing heat dissipation pipe 602, the coolant turns back, flows back to the liquid distribution ring 601 along the inner wall of the inner cylinder 502, and is finally discharged from the outlet pipe 604. Similarly, the cooling water in the external spiral heat dissipation pipe 605 is first conveyed to the end of the outer cylinder 505 away from the spiral feeder 2, and then spirals back from the molding end towards the feed end, realizing a gradient cooling from front to back. The cooling water in the outlet pipe 604 and the spiral heat dissipation pipe 605 after absorbing heat is uniformly merged into the outlet confluencer 607, and then discharged into the external cooling tower through the outlet pipe 609 for cooling treatment.

[0037] During the rotation of the driven shaft 702, the impeller 703 is driven to rotate at high speed and generate a stable airflow. The airflow is introduced into the air duct 503 through the air guide duct 704, and then ejected through the six inclined exhaust holes 705 arranged in a ring array at the end of the air duct 503, forming a spiral airflow rotating along the inner wall of the aluminum tube, breaking the airflow stagnation phenomenon of the inner wall boundary layer, and further achieving auxiliary heat dissipation of the molded inner wall on the basis of water cooling.

[0038] The extruded aluminum tube blank then enters the external rotary spray cooling process; the coolant enters the flow channel between the fixed liquid inlet outer frame 802 and the rotating inner frame 803, and is delivered to each atomizing nozzle 804, which atomizes and sprays it out; at the same time, the servo motor 808 is started, and the drive end of the servo motor 808 drives the rotating shaft 805 to rotate stably through the coupling. The drive gear 806 at the end of the rotating shaft 805 meshes with the gear ring 807 on the outer wall of the rotating inner frame 803, thereby driving the gear ring 807 and the rotating inner frame 803 to rotate synchronously at low speed, so that the atomizing nozzle 804 forms a spiral spray trajectory, and the rotation direction is consistent with the internal spiral airflow direction, so as to perform secondary uniform cooling on the outer wall of the extruded aluminum tube blank.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A continuous die-casting apparatus for non-ferrous metal production, comprising a main frame (1), a screw feeder (2), a cooling chamber (3), and an extension plate (4), characterized in that: The spiral feeder (2) and cooling chamber (3) are respectively fixedly installed on the top of the main frame (1). An extension plate (4) is fixedly installed in the middle of the main frame (1). An extrusion mold (5) is provided in the cooling chamber (3). A cooling drive circulation component (6) and a wind power heat dissipation drive component (7) are provided in the extrusion mold (5). An external spiral spray heat dissipation component (8) is provided on the side of the top of the main frame (1) away from the spiral feeder (2). A water tank (9) is provided on the side of the top of the main frame (1) close to the extension plate (4). The extrusion mold (5) includes a fixed inner frame (501), which is fixedly installed in the middle of the inner wall of the cooling chamber (3) by a support. One end of the fixed inner frame (501) gradually tapers into a cone shape. An inner cylinder (502) is fixedly installed at the end of the fixed inner frame (501). A duct (503) is sealed to the middle of the inner cylinder (502) by a flange. Four splicing frames (504) are fixedly fitted on the outer wall of the fixed inner frame (501). 504) The inner cylinder (502) is enclosed to form a cylindrical structure. The inner cylinder (502) is connected to the outer cylinder (505) through a flange seal at one end away from the screw feeder (2). The end of the outer cylinder (505) is fixedly connected to the cooling chamber (3). The inner cylinder (502) is connected to the conical cylinder (506) corresponding to the conical end of the fixed inner frame (501) through a flange seal at one end near the screw feeder (2). The conical cylinder (506) is connected to the discharge end of the screw feeder (2). The cooling drive circulation assembly (6) includes a liquid distribution ring (601), which is fixedly installed on the inner wall of the fixed inner frame (501) by a support. The end of the liquid distribution ring (601) is sealed and connected to a number of circulating folding heat dissipation pipes (602) distributed in a ring array. The liquid inlet end and the liquid outlet end of the liquid distribution ring (601) are respectively connected to an inlet pipe (603) and an outlet pipe (604). The outer wall of the outer cylinder (505) is fitted with two sets of spiral heat dissipation pipes (605). The wind power cooling drive assembly (7) includes a drive housing (701) and a driven shaft (702). The drive housing (701) is fixedly installed on the top of the expansion plate (4). The driven shaft (702) is rotatably installed in the middle of the drive housing (701) through a bearing. An impeller (703) is fixedly installed at the end of the driven shaft (702). The exhaust end of the drive housing (701) is sealed with a guide pipe (704) through a flange. The other end of the guide pipe (704) is connected to the air duct (503). The end of the air duct (503) is provided with six inclined exhaust holes (705) arranged in a ring array.

2. The continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, The external spiral spray heat dissipation assembly (8) includes a base (801) and a fixed liquid inlet outer frame (802). The base (801) is fixedly installed on the main frame (1) by bolts. The fixed liquid inlet outer frame (802) is fixedly installed on the top of the base (801). The inner wall of the fixed liquid inlet outer frame (802) is rotatably connected to a rotating inner frame (803). The inner wall of the rotating inner frame (803) is fixedly installed with six atomizing nozzles (804) arranged in a ring array. The top of the base (801) is rotatably installed with a rotating shaft (805) through a shaft seat. The end of the rotating shaft (805) is fixedly installed with a drive gear (806). The outer wall of the rotating inner frame (803) is fixedly fitted with a toothed ring (807), and the drive gear (806) and the toothed ring (807) mesh with each other.

3. The continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, The inner wall of the cooling chamber (3) is fixedly installed with a secondary liquid inlet distributor (606) and a liquid outlet confluencer (607). The liquid inlet end of the secondary liquid inlet distributor (606) is connected to an inlet pipe (608), and the liquid outlet end of the liquid outlet confluencer (607) is connected to an outlet pipe (609). The liquid inlet ends of the liquid inlet pipe (603) and the spiral heat dissipation pipe (605) are connected to the liquid outlet end of the secondary liquid inlet distributor (606), and the liquid outlet ends of the liquid outlet pipe (604) and the spiral heat dissipation pipe (605) are connected to the liquid inlet end of the liquid outlet confluencer (607).

4. A continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, The top of the expansion plate (4) is fixedly installed with a drive housing (610) that is symmetrically distributed with the drive housing (701), and the driven shaft (702) is rotatably connected to the drive housing (610). The drive housing (610) is rotatably installed with a drive shaft (611), and the drive shaft (611) and the driven shaft (702) are arranged symmetrically up and down. The drive shaft (611) and the driven shaft (702) are connected by a transmission of the same module gears that mesh with each other. The outer walls of the drive shaft (611) and the driven shaft (702) are both fixedly fitted with rotors (612), and the two rotors (612) rotate inside the drive housing (610).

5. A continuous die-casting apparatus for non-ferrous metal production as described in claim 4, characterized in that, The drive housing (610) has a drain pipe (615) and an inlet pipe (616) that are connected through to the drain end and the inlet end, respectively. The inlet pipe (616) is connected through to the bottom of the water tank (9).

6. A continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, The main liquid inlet distributor (613) is fixedly installed on one side of the top of the expansion plate (4), and the discharge pipe (615) is connected to the inlet end of the main liquid inlet distributor (613) through a one-way valve. The main inlet diverter (613) has two drain ends. The inlet pipe (608) is connected to one of the drain ends. The drain end of the inlet pipe (608) is also connected to the diverter pipe (614), and the other end of the diverter pipe (614) is connected to the inlet end of the fixed inlet frame (802).

7. A continuous die-casting apparatus for non-ferrous metal production as described in claim 2, characterized in that, A servo motor (808) is fixedly installed on the top of the base (801) near the rotating shaft (805), and the drive end of the servo motor (808) is connected to the rotating shaft (805) via a coupling.

8. A continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, A drive motor (617) is fixedly installed on the top of the expansion plate (4) near the drive shaft (611), and the drive end of the drive motor (617) is connected to the drive shaft (611) via a coupling.

9. A continuous die-casting apparatus for non-ferrous metal production as described in claim 1, characterized in that, The inner side of the circulating reflux heat dissipation pipe (602) is fixedly connected to the outer wall of the air duct (503) through a metal frame, the outer side of the circulating reflux heat dissipation pipe (602) is fixedly connected to the inner wall of the outer cylinder (505) through a metal frame, and the spiral heat dissipation pipe (605) is fixedly connected to the outer wall of the outer cylinder (505) through a metal frame.

10. The method used in a continuous die-casting apparatus for non-ferrous metal production as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. First, control the start of the drive motor (617). The drive motor (617) drives the driven shaft (702) to rotate synchronously through the drive shaft (611), so that the rotor (612) in the drive housing (610) forms a stable pumping pressure, and sends the cooling water in the water tank (9) into the drive housing (610) through the discharge pipe (616), and then stably delivers it to the main liquid inlet distributor (613) through the discharge pipe (615), thus completing the pre-start of the cooling water circulation. S2. After the cooling water is evenly divided by the main inlet distributor (613), one path enters the secondary inlet distributor (606) through the inlet pipe (608), and is respectively delivered to the circulating return heat dissipation pipe (602) and the spiral heat dissipation pipe (605) on the outer wall of the outer cylinder (505) to achieve synchronous and efficient cooling of the inner and outer walls of the extrusion die (5); the cooling water that has been heated after absorbing heat is collected into the outlet confluencer (607), and then discharged into the external cooling tower for cooling treatment and recycling. S3. During the rotation of the driven shaft (702), the impeller (703) is driven to rotate at high speed to generate airflow. The airflow is introduced into the air duct (503) through the air guide pipe (704) and forms a spiral airflow through the inclined exhaust hole (705) at the end of the air duct (503) to assist the cooling of the inner wall of the aluminum liquid forming, and at the same time break the airflow stagnation on the inner wall of the aluminum tube after cooling and forming. S4. The aluminum liquid is continuously extruded and conveyed by the screw feeder (2), smoothly enters the conical cylinder (506), and flows into the cavity formed between the inner cylinder (502) and the outer cylinder (505). Under the combined cooling effect inside and outside the mold, it cools down and solidifies, gradually forming an aluminum tube blank and continuing to be extruded forward. S5. The servo motor (808) drives the rotating inner frame (803) to rotate at low speed, so that the atomizing nozzle (804) forms a spiral atomizing spray in the same direction as the internal spiral airflow, and performs secondary uniform cooling on the outer wall of the extruded aluminum tube blank to complete the continuous die casting.

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