Foam metal production system based on hollow microsphere batch feeding

Abstract

The invention discloses a foam metal production system based on batch feeding of hollow microbeads, which comprises a melt pool with an opening at the upper end and used for accommodating molten metal; the discharging guide device is arranged above the melt pool and is used for guiding the formed foam metal material to be continuously discharged; the micro-bead feeding device is used for adding hollow micro-beads into the melt pool in batches; the micro-bead driving device is used for driving the hollow micro-beads to enter the discharging guide device; and an upper cover covers the opening at the upper end of the melt pool. According to the foam metal production system based on batch feeding of the hollow microspheres, the hollow microspheres are used for replacing traditional bubbles to produce foam metal, the problem that the sizes of the bubbles are difficult to control can be solved, and the performance of the foam metal can be effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of porous foam materials, and specifically relates to a foam metal production system based on batch feeding of hollow microspheres. Background Art

[0002] Aluminum foam is made by adding additives to pure aluminum or aluminum alloy and then through a foaming process, and it has both metallic and bubble characteristics. Aluminum foam has the advantages of low density, strong high-impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding performance, strong weather resistance, filtering ability, easy processing, easy installation, high forming accuracy, and can be surface-coated, etc., and has great market application potential in the fields of railway passenger cars, military, construction, automobiles, decoration, aerospace, aviation, ships, etc. Aluminum foam can be divided into open-cell aluminum foam and closed-cell aluminum foam from the pore structure, and among them, closed-cell aluminum foam has a wider application. The main preparation method of closed-cell aluminum foam is the melt blowing method.

[0003] In the melt blowing process, gas is directly injected into liquid aluminum or aluminum alloy through a blowing head, which has the advantages of low cost and continuous production. However, in the existing blowing method, all bubbles are generated in the pores processed on one or more groups of planes, and the gas outlet is uneven and uncontrollable, resulting in different bubble sizes and difficult to accurately control the pore diameter, and finally the pore diameter distribution of the product is uneven. The biggest problem of the planar pores in the existing blowing method is that the bubble detachment speed is slow, which greatly affects the production efficiency and the control of the bubble pore diameter. In order to control the bubble pore diameter and improve the production efficiency, the rotary blowing method and the reciprocating blowing method are proposed. The rotary blowing method drives the blowing head to rotate to achieve gas dispersion, and the reciprocating blowing method disperses bubbles by driving the blowing head to reciprocate. However, the rotary blowing method and the reciprocating blowing method cause greater disturbance to the melt, and the bubble detachment conditions are quite different, and the pore uniformity of the prepared aluminum foam is poor. In particular, the interference caused by vibration causes a large number of bubbles to merge, further exacerbating the bubble non-uniformity and control difficulties. Hollow microspheres are a new type of material with wide applications and excellent performance developed in recent years. Hollow microspheres are tiny, hollow spherical powders. The particle size can be arbitrarily selected between the micron levels according to needs. The density of hollow glass microspheres is 0.1 - 0.7 g / ml, and it has the advantages of light weight and large volume, low thermal conductivity, high compressive strength, good dispersion, fluidity, and stability. In addition, hollow glass microspheres also have excellent properties such as insulation, self-lubrication, sound insulation, water non-absorption, fire resistance, corrosion resistance, radiation protection, and non-toxicity. Summary of the Invention

[0004] In view of the excellent properties of hollow microspheres, replacing traditional bubbles with hollow microspheres can solve the problem of difficult control of bubble size and effectively improve the performance of foamed metals. In view of this, the purpose of the present invention is to provide a foamed metal production system based on batch feeding of hollow microspheres.

[0005] To achieve the above object, the present invention provides the following technical solutions: A foamed metal production system based on batch feeding of hollow microspheres, comprising: A molten liquid pool, the upper end of the molten liquid pool is open and is used to accommodate molten metal liquid; A discharge guiding device, arranged above the molten liquid pool and used to guide the continuous discharge of the formed foamed metal material; A microsphere feeding device, used to batch add hollow microspheres into the molten liquid pool; A microsphere driving device, used to drive the hollow microspheres into the discharge guiding device; The upper end opening of the molten liquid pool is covered with an upper cover; The microsphere feeding device includes a sealed box located inside the molten liquid pool. The sealed box is installed on the upper cover, and a floating channel for guiding the hollow microspheres to float to the discharge guiding device is formed between the first side wall of the sealed box and the side wall of the molten liquid pool; A pulse air pipe is arranged inside the sealed box. The first end of the pulse air pipe is set as an air outlet and is arranged on the second side wall of the sealed box. The other end of the pulse air pipe extends out of the upper cover and is connected to a pulse air source; A microsphere feeding pipe is connected to the pulse air pipe. The upper end of the microsphere feeding pipe extends out of the upper cover and is provided with a feeding hopper for storing hollow microspheres. A feeding control valve is arranged on the feeding pipe below the feeding hopper; A gate valve is arranged on the pulse air pipe, and the gate valve is arranged between the microsphere feeding pipe and the air outlet; The microbead driving device includes a horizontal push plate and a vertical push plate. The horizontal push plate is slidably engaged with the second side wall and can move along the vertical direction. The vertical push plate is slidably engaged with the bottom surface of the horizontal push plate and the bottom surface of the sealed box and can move along the horizontal direction perpendicular to the second side wall. The microbead driving device further includes a first driving assembly for driving the horizontal push plate to move along the vertical direction and a second driving assembly for driving the vertical push plate to move along the horizontal direction. The upper end position of the stroke interval of the horizontal push plate moving along the vertical direction is above the air outlet, and the lower end position of the stroke interval is that the bottom surface of the horizontal push plate is flush with the bottom surface of the sealed box. The first end position of the stroke interval of the vertical push plate moving along the horizontal direction is at the bottom surface of the horizontal push plate, and the second end position of the stroke interval is that the front side surface of the vertical push plate is flush with the first side wall. When the vertical push plate is at the first end position of the stroke interval, there is a preset distance between the front side surface of the vertical push plate and the second side wall. Both the first side wall and the second side wall are vertical side walls and are arranged opposite to each other.

[0006] Furthermore, a vertical slide rail is provided on the second side wall, and the horizontal push plate is slidably engaged with the vertical slide rail. The first driving assembly includes a first driving cylinder fixedly installed on the upper cover, and the first driving rod of the first driving cylinder is in the vertical direction and is connected to the horizontal push plate.

[0007] Furthermore, a first horizontal slide rail is provided on the bottom surface of the horizontal push plate, and a second horizontal slide rail is provided on the bottom surface of the sealed box. When the horizontal push plate moves along the vertically downward direction and the bottom surface of the horizontal push plate is flush with the bottom surface of the sealed box, the first horizontal slide rail and the second horizontal slide rail are on the same straight line so that the vertical push plate can move across the bottom surface of the horizontal push plate and the bottom surface of the sealed box.

[0008] Furthermore, the second driving assembly includes a second driving cylinder installed on the side wall of the molten pool. The second driving rod of the second driving cylinder is in the horizontal direction, and an electromagnet is provided at the end of the second driving rod. A permanent magnet is provided on the rear side surface of the vertical push plate corresponding to the electromagnet.

[0009] Furthermore, a limiting block for limiting the first end position of the stroke interval of the vertical push plate is provided on the bottom surface of the horizontal push plate.

[0010] Furthermore, a baffle assembly is further included. The baffle assembly includes a baffle and a baffle driving assembly for driving the baffle to move along the vertical direction. The baffle driving assembly is used to drive the baffle to block the front side surface of the vertical push plate when the vertical push plate is at the second end position of the stroke interval, so as to prevent the vertical push plate from disturbing the floating direction of the hollow microbeads when moving towards the first end position of the stroke interval.

[0011] Further, the baffle assembly further includes a fixing plate fixedly installed on the bottom surface of the molten liquid pool. A vertical guiding track is provided on the fixing plate, and the baffle is slidably engaged with the vertical guiding track; the baffle driving assembly includes a baffle driving cylinder installed on the bottom surface of the molten liquid pool, and a driving rod of the baffle driving cylinder is connected to the baffle.

[0012] Further, a blade assembly for uniformly distributing the hollow microspheres is provided in the floating channel; the blade assembly includes a propeller blade located in the floating channel and a blade driving assembly drivingly connected to the propeller blade.

[0013] Further, a molten metal feeding device for adding molten metal into the molten liquid pool is further provided on the upper cover.

[0014] Further, an exhaust port for exhausting gas is further provided on the upper cover.

[0015] The beneficial effects of the present invention are as follows: When the foam metal production system based on batch feeding of hollow microspheres of the present invention is used for producing foam metal, the main process is as follows: Open the feeding control valve to quantitatively add hollow microspheres into the pulse air pipe; Open the gate valve, and use the pulsed air flow generated by the pulsed air source to flush the hollow microspheres in the pulse air pipe into the molten liquid pool from the air outlet and immediately close the gate valve to prevent the molten metal from entering the pulse air pipe, and the hollow microspheres can be quantitatively added into the pulse air pipe again; The hollow microspheres entering the molten liquid pool accumulate in the space between the horizontal push plate, the vertical push plate and the second side wall under the action of buoyancy; Use the first driving assembly to drive the horizontal push plate to move downward until the bottom surface of the horizontal push plate is flush with the bottom surface of the sealing box, and then use the second driving assembly to drive the vertical push plate to move towards the direction where the first side wall is located until the front side surface of the vertical push plate is flush with the first side wall. At this time, the hollow microspheres are pushed into the floating channel and enter the discharge guiding device through the floating channel to form foam metal material and continuously discharge; After the pushing of the hollow microspheres is completed, use the second driving assembly to drive the vertical push plate to reset and move to the horizontal push plate and reach the first end position of the stroke interval, and then use the first driving assembly to drive the horizontal push plate to move upward to the upper end position of the forming interval; By repeating in this way, the technical purpose of adding hollow microspheres into the molten liquid pool in batches can be achieved; In summary, the foam metal production system based on batch feeding of hollow microspheres of the present invention uses hollow microspheres instead of traditional air bubbles to produce foam metal, which can solve the problem that the air bubble size is difficult to control and can effectively improve the performance of the foam metal. Description of the Drawings

[0016] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1Schematic diagram of the first state structure of the foam metal production system based on batch feeding of hollow microspheres according to the present invention; Figure 2 is Figure 1 Enlarged view of area A of; Figure 3 is Figure 1 Enlarged view of area B of; Figure 4 Schematic diagram of the second state structure of the foam metal production system based on batch feeding of hollow microspheres according to the present invention; Figure 5 Schematic diagram of the third state structure of the foam metal production system based on batch feeding of hollow microspheres according to the present invention.

[0017] Explanation of reference numerals: 1 - Hollow microspheres; 10 - Melt pool; 11 - Molten metal; 12 - Upper cover; 13 - Exhaust port; 14 - Molten metal feeding device; 21 - First guiding part; 22 - Second guiding part; 23 - Discharge guiding channel; 24 - Floating channel; 25 - First guiding roller; 26 - First guiding belt; 27 - Second guiding roller; 28 - Second guiding belt; 291 - Tool holder; 292 - Cutting tool; 31 - Sealing box; 311 - First side wall; 312 - Second side wall; 313 - Vertical slide rail; Second horizontal slide rail; 32 - Pulse air pipe; 33 - Microsphere feeding pipe; 331 - Feeding hopper; 332 - Feeding control valve; 34 - Gate valve; 35 - Power device; 41 - Horizontal push plate; 411 - First horizontal slide rail; 412 - Limiting block; 42 - Vertical push plate; 421 - Permanent magnet; 43 - First driving cylinder; 431 - First driving rod; 44 - Second driving cylinder; 441 - Second driving rod; 442 - Electromagnet; 51 - Baffle; 52 - Fixed plate; 53 - Vertical guiding track; 54 - Baffle driving cylinder; 61 - Propeller blade; 62 - Driving motor; 63 - Bevel gear transmission mechanism. Detailed implementation manners

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the examples given are not intended to limit the present invention.

[0019] Such as Figure 1As shown in the figure, the foam metal production system based on the batch feeding of hollow microspheres in this embodiment includes a molten liquid pool 10, a discharge guiding device 20, a microsphere feeding device 30, a microsphere driving device 40, and a baffle assembly 50. The specific implementation manners of the molten liquid pool 10, the discharge guiding device 20, the microsphere feeding device 30, the microsphere driving device 40, and the baffle assembly 50 will be described in detail below.

[0020] (1) Molten liquid pool In this embodiment, the upper end of the molten liquid pool 10 is open and used to contain the molten metal liquid 11. An upper cover 12 is installed on the upper end opening of the molten liquid pool 10 in this embodiment.

[0021] In the preferred implementation manner of this embodiment, an exhaust port 13 for exhausting gas is further provided on the upper cover 12 to discharge the gas injected into the molten liquid pool through the pulse gas pipe.

[0022] In the preferred implementation manner of this embodiment, a metal liquid feeding device 14 for adding the metal liquid 11 into the molten liquid pool 10 is further provided on the upper cover 12 to supplement the consumption of the metal liquid.

[0023] (2) Discharge guiding device In this embodiment, the discharge guiding device 20 is arranged above the molten liquid pool 10 and used to guide the continuous discharge of the formed foam metal material. In this embodiment, the discharge guiding device includes a first guiding part 21 and a second guiding part 22 arranged oppositely. A discharge guiding channel 23 for the forming and discharging of the foam metal material is formed between the first guiding part 21 and the second guiding part 22. A floating channel 24 for guiding the floating direction of the hollow microspheres is arranged below the discharge guiding channel 23. The floating channel 24 is used to guide the hollow microspheres to float and enter the discharge guiding channel 23.

[0024] In this embodiment, first guiding rollers 25 and second guiding rollers 27 are respectively arranged at intervals on the opposite sides of the first guiding part 21 and the second guiding part 22. A first guiding belt 26 is sleeved on the first guiding roller 25, and a second guiding belt 28 is arranged on the second guiding roller 27. The distance between the first guiding part 21 and the second guiding part 22 is adjustable. In this way, by driving the first guiding belt 26 and the second guiding belt 28 to move upward synchronously through the first guiding roller 25 and the second guiding roller 27, the foam metal material can be driven to move upward along the discharge guiding channel 23 and continuously discharged. Water-cooled jackets (not shown in the figure) for cooling and forming the foam metal material are arranged in the first guiding part 21 and the second guiding part 22 of this embodiment; the water-cooled jackets control the cooling rate of the foam metal material to be 10 - 50 °C / s.

[0025] In this embodiment, a cutting device for cutting the foamed metal material is provided on the discharge guiding device. The cutting device is above the discharge guiding device in the vertical direction. The cutting device can be arranged at the outlet of the discharge guiding channel 23. After the foamed metal material comes out of the outlet of the discharging device, the cutting device can cut the foamed metal material. In some embodiments, the cutting device includes a tool holder 291 and a cutting tool 292. The tool holder 291 is installed on the top surface of the first guiding portion 21, and when the cutting tool 292 works, it moves horizontally relative to the first guiding portion 21 to cut the foamed metal material. In addition, during the process of the cutting tool 292 cutting the foamed metal material, a driving mechanism arranged in the tool holder 291 also drives the cutting tool 292 to move synchronously with the foamed metal material, so that the cut is smoother, and the cutting tool 292 does not affect the continuous discharge of the foamed metal material.

[0026] (3) Microsphere feeding device The microsphere feeding device 30 is used to add hollow microspheres 1 into the molten pool 10 in batches. As Figure 2 shown, in this embodiment, the microsphere feeding device 30 includes a sealed box 31 located in the molten pool 10. The sealed box 31 is installed on the upper cover 12, and a floating channel 24 for guiding the hollow microspheres to float to the discharge guiding device 20 is formed between the first side wall 311 of the sealed box 31 and the side wall of the molten pool 10. A pulse air pipe 32 is arranged in the sealed box 31. The first end of the pulse air pipe 32 is set as an air outlet and is arranged on the second side wall 312 of the sealed box 31. The other end of the pulse air pipe 32 extends out of the upper cover 12 and is connected to a pulse air source (not shown in the figure). A microsphere feeding pipe 33 is connected to the pulse air pipe 32. The upper end of the microsphere feeding pipe 33 extends out of the upper cover 12 and is provided with a feeding hopper 331 for storing hollow microspheres. A feeding control valve 332 is arranged on the feeding pipe 33 below the feeding hopper 331. A gate valve 34 is arranged on the pulse air pipe 31, and the gate valve 34 is arranged between the microsphere feeding pipe 33 and the air outlet. Specifically, a power device 35 for controlling the opening and closing of the gate valve 34 is arranged in the sealed box 31. Specifically, both the first side wall 311 and the second side wall 312 of the sealed box 31 are vertical side walls and are arranged opposite to each other.

[0027] (4) Microsphere driving device As Figure 2 shown, the microsphere driving device 40 of this embodiment is used to drive the hollow microspheres into the discharge guiding device 20. Specifically, the microsphere driving device 40 includes a horizontal push plate 41 and a vertical push plate 42. The horizontal push plate 41 is slidably matched with the second side wall 312 and can move along the vertical direction; the vertical push plate 42 is slidably matched with the bottom surface of the horizontal push plate 41 and the bottom surface of the sealed box 31 and can move along the horizontal direction perpendicular to the second side wall 312.

[0028] In this embodiment, the microbead driving device 40 further includes a first driving assembly for driving the horizontal push plate 41 to move in the vertical direction. Specifically, the upper end position of the travel interval of the horizontal push plate 41 moving in the vertical direction is above the air outlet, and the lower end position of the travel interval is that the bottom surface of the horizontal push plate 41 is flush with the bottom surface of the sealing box 31. Specifically, in this embodiment, a vertical slide rail 313 is provided on the second side wall 312, and the horizontal push plate 41 is slidably engaged with the vertical slide rail 313; the first driving assembly includes a first driving cylinder 43 fixedly installed on the upper cover 12, and the first driving rod 431 of the first driving cylinder 43 is in the vertical direction and is connected to the horizontal push plate 41. The first driving cylinder 43 can be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder, etc., which will not be elaborated here.

[0029] In this embodiment, the microbead driving device 40 further includes a second driving assembly for driving the vertical push plate 42 to move in the horizontal direction. Specifically, the first end position of the travel interval of the vertical push plate 42 moving in the horizontal direction is at the bottom surface of the horizontal push plate 41, and the second end position of the travel interval is that the front side surface of the vertical push plate 42 is flush with the first side wall 311. When the vertical push plate 42 is at the first end position of the travel interval, there is a preset distance between the front side surface of the vertical push plate 42 and the second side wall 312 to collect the hollow microbeads ejected from the air outlet.

[0030] In this embodiment, a first horizontal slide rail 411 is provided on the bottom surface of the horizontal push plate 41, and a second horizontal slide rail 314 is provided on the bottom surface of the sealing box 31. When the horizontal push plate 41 moves in the vertically downward direction and the bottom surface of the horizontal push plate 41 is flush with the bottom surface of the sealing box 31, the first horizontal slide rail 411 and the second horizontal slide rail 314 are on the same straight line. In this way, the vertical push plate 42 can move across the bottom surface of the horizontal push plate 41 and the bottom surface of the sealing box 30.

[0031] The second driving assembly of this embodiment includes a second driving cylinder 44 installed on the side wall of the molten pool 10. The second driving rod 441 of the second driving cylinder 44 is in the horizontal direction, and an electromagnet 442 is provided at the end of the second driving rod 441. A permanent magnet 421 is provided on the rear side surface of the vertical push plate 42 corresponding to the electromagnet 442. In this way, when the vertical push plate 42 is driven to move by the second driving cylinder 44, it is necessary to energize the electromagnet 442 so that the electromagnet 442 and the permanent magnet 421 are adsorbed and connected by electromagnetic force, so that the moving position of the vertical push plate 42 can be accurately controlled. When driving the vertical push plate 42 to move from the horizontal push plate 41 to the sealing box 31, a thrust is applied to the vertical push plate 42 by the second driving cylinder 44 and the second driving rod 441. In the case where the electromagnet 442 and the permanent magnet 421 are adsorbed and connected, the vertical push plate 42 will not separate from the second driving rod 441, so that the second driving cylinder 44 can accurately control the position of the second end of the stroke interval of the vertical push plate 42. Similarly, when driving the vertical push plate 42 to move from the bottom surface of the sealing box 31 to the bottom surface of the horizontal push plate 41, a pulling force is applied to the vertical push plate 42 by the second driving cylinder 44 and the second driving rod 441. In the case where the electromagnet 442 and the permanent magnet 421 are adsorbed and connected, the vertical push plate 42 will not separate from the second driving rod 441, so that the second driving cylinder 44 can accurately control the position of the first end of the stroke interval of the vertical push plate 42.

[0032] Specifically, the second driving cylinder 44 can be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder, etc., which will not be elaborated here.

[0033] In the preferred embodiment of this embodiment, a limiting block 412 for limiting the position of the first end of the stroke interval of the vertical push plate 42 is provided on the bottom surface of the horizontal push plate 41, which further improves the control accuracy of the position of the first end of the stroke interval of the vertical push plate 42.

[0034] (5) Baffle assembly As Figure 3 shown, the foam metal production system based on batch feeding of hollow microspheres in this embodiment further includes a baffle assembly 50. The baffle assembly 50 includes a baffle 51 and a baffle driving assembly for driving the baffle 51 to move along the vertical direction. The baffle driving assembly is used to drive the baffle 51 to block the front side surface of the vertical push plate 42 when the vertical push plate 42 is at the second end position of the stroke interval, so as to prevent the vertical push plate 42 from disturbing the floating direction of the hollow microspheres when moving towards the first end position of the stroke interval.

[0035] Specifically, the baffle assembly of this embodiment further includes a fixing plate 52 fixedly installed on the bottom surface of the molten liquid pool 10. A vertical guiding track 53 is provided on the fixing plate 52, and the baffle 51 is slidably engaged with the vertical guiding track 53. The baffle driving assembly of this embodiment includes a baffle driving cylinder 54 installed on the bottom surface of the molten liquid pool 10, and the driving rod of the baffle driving cylinder 54 is connected to the baffle 51. In this way, when the vertical push plate 42 is reset and moves onto the horizontal baffle 41, the baffle 51 is driven to move vertically downward to expose the space for the vertical push plate 42 to push the hollow microspheres. When the vertical push plate 42 moves towards the direction of the first side wall 311 to push the hollow microspheres, and the front side surface of the vertical push plate 42 is flush with the first side wall 311, the baffle is driven to move vertically upward to block the front side surface of the vertical push plate 42, separating the vertical baffle 42 from the hollow microspheres, so as to ensure that the turbulence caused by the vertical push plate 42 moving towards the horizontal push plate 41 during reset does not affect the upward floating direction of the hollow microspheres along the floating channel 24.

[0036] (6) Blade assembly As Figure 3 shown, a blade assembly for evenly distributing the hollow microspheres is provided in the floating channel 24 of this embodiment. The blade assembly includes a propeller blade 61 located in the floating channel and a blade driving assembly drivingly connected to the propeller blade 61. In this embodiment, the blade driving assembly includes a driving motor 62 installed on the side wall of the molten liquid pool 10, and the output shaft of the driving motor 62 is drivingly connected to the rotating shaft of the propeller blade 61 through a bevel gear transmission mechanism 63.

[0037] In this embodiment, the hollow microspheres can be hollow ceramic microspheres, hollow glass microspheres, hollow spheres made of metal materials, etc., which will not be elaborated here.

[0038] In this embodiment, all components located in the molten liquid pool 10 are made of high-temperature resistant materials, including high-temperature resistant cermet materials, titanium alloy materials, etc., which will not be elaborated here.

[0039] In this embodiment, a high-temperature resistant sealing cooperation method is adopted between the second driving rod 441 and the molten liquid pool 10; similarly, a high-temperature resistant sealing cooperation method is adopted between the driving rod of the driving cylinder 55 and the molten liquid pool 10; a high-temperature resistant sealing cooperation method is also required between the output shaft of the driving motor 62 and the molten liquid pool 10. The high-temperature resistant sealing method can be a mechanical labyrinth seal, which will not be elaborated here.

[0040] The main process of producing foam metal by this embodiment based on the foam metal production system with batch feeding of hollow microspheres is as follows: Open the feeding control valve, quantitatively add hollow microspheres into the pulse air pipe, as Figure 3As shown; open the gate valve, use the pulsed air flow generated by the pulsed air source to flush the hollow microspheres in the pulsed air pipe into the molten pool from the air outlet, and immediately close the gate valve to prevent the molten metal from entering the pulsed air pipe, and the hollow microspheres can be quantitatively added into the pulsed air pipe again; the hollow microspheres entering the molten pool accumulate in the space between the horizontal push plate, the vertical push plate and the second side wall under the action of buoyancy, as Figure 1 shown; use the first driving component to drive the horizontal push plate to move downward until the bottom surface of the horizontal push plate is flush with the bottom surface of the sealing box, as Figure 2 shown; then use the second driving component to drive the vertical push plate to move towards the direction of the first side wall until the front side surface of the vertical push plate is flush with the first side wall, as Figure 3 shown. At this time, the hollow microspheres are pushed into the floating channel and enter the discharge guiding device through the floating channel to form a foam metal material and continuously discharge; after the hollow microspheres are pushed, use the second driving component to drive the vertical push plate to reset and move to the horizontal push plate and reach the first end position of the stroke interval, and then use the first driving component to drive the horizontal push plate to move upward to the upper end position of the forming interval; repeating like this can achieve the technical purpose of adding hollow microspheres into the molten pool in batches; in summary, the foam metal production system based on the batch feeding of hollow microspheres in this embodiment can solve the problem of difficult control of bubble size and effectively improve the performance of the foam metal by using hollow microspheres instead of traditional bubbles to produce foam metal.

[0041] The above-described embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A foam metal production system based on batch feeding of hollow microspheres, characterized in that: Comprising: A molten liquid pool, the upper end of the molten liquid pool is open and used for accommodating molten metal liquid; A discharging guiding device, arranged above the molten liquid pool and used for guiding the continuous discharging of the formed metallic foam material; A microsphere feeding device, used for batch-feeding hollow microspheres into the molten liquid pool; A microsphere driving device, used for driving the hollow microspheres into the discharging guiding device; The upper end opening of the molten liquid pool is covered with an upper cover; The microsphere feeding device includes a sealed box located inside the molten liquid pool, the sealed box is installed on the upper cover, and a floating channel for guiding the hollow microspheres to float up to the discharging guiding device is formed between the first side wall of the sealed box and the side wall of the molten liquid pool; A pulse air pipe is arranged inside the sealed box, the first end of the pulse air pipe is set as an air outlet and is arranged on the second side wall of the sealed box, and the other end of the pulse air pipe extends out of the upper cover and is connected to a pulse gas source; A microsphere feeding pipe is connected to the pulse air pipe, the upper end of the microsphere feeding pipe extends out of the upper cover and is provided with a feeding hopper for storing hollow microspheres, and a feeding control valve is arranged on the feeding pipe below the feeding hopper; A gate valve is arranged on the pulse air pipe, and the gate valve is arranged between the microsphere feeding pipe and the air outlet; The microsphere driving device includes a horizontal push plate and a vertical push plate, the horizontal push plate is slidably matched with the second side wall and can move along the vertical direction, and the vertical push plate is slidably matched with the bottom surface of the horizontal push plate and the bottom surface of the sealed box and can move along the horizontal direction perpendicular to the second side wall; The microsphere driving device further includes a first driving assembly for driving the horizontal push plate to move along the vertical direction and a second driving assembly for driving the vertical push plate to move along the horizontal direction; The upper end position of the stroke interval of the horizontal push plate moving along the vertical direction is above the air outlet, and the lower end position of the stroke interval is that the bottom surface of the horizontal push plate is flush with the bottom surface of the sealed box; The first end position of the stroke interval of the vertical push plate moving along the horizontal direction is at the bottom surface of the horizontal push plate, and the second end position of the stroke interval is that the front side surface of the vertical push plate is flush with the first side wall; When the vertical push plate is at the first end position of the stroke interval, there is a preset distance between the front side surface of the vertical push plate and the second side wall; Both the first side wall and the second side wall are vertical side walls and are arranged oppositely.

2. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, wherein: A vertical slide rail is arranged on the second side wall, and the horizontal push plate is slidably matched with the vertical slide rail; The first driving assembly includes a first driving cylinder fixedly installed on the upper cover, and the first driving rod of the first driving cylinder is in the vertical direction and is connected to the horizontal push plate.

3. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, wherein: The bottom surface of the horizontal push plate is provided with a first horizontal slide rail, and the bottom surface of the sealed box is provided with a second horizontal slide rail; When the horizontal push plate moves along the vertically downward direction and the bottom surface of the horizontal push plate is flush with the bottom surface of the sealed box, the first horizontal slide rail and the second horizontal slide rail are on the same straight line so that the vertical push plate can move across the bottom surface of the horizontal push plate and the bottom surface of the sealed box.

4. The foam metal production system based on batch feeding of hollow microspheres according to claim 3, characterized in that: The second driving component includes a second driving cylinder installed on the side wall of the molten pool. The second driving rod of the second driving cylinder is in the horizontal direction, and an electromagnet is provided at the end of the second driving rod. A permanent magnet corresponding to the electromagnet is provided on the rear side surface of the vertical push plate.

5. The foam metal production system based on batch feeding of hollow microspheres according to claim 4, characterized in that: A limiting block for limiting the position of the first end of the stroke interval of the vertical push plate is provided on the bottom surface of the horizontal push plate.

6. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, characterized in that: It further includes a baffle component. The baffle component includes a baffle and a baffle driving component for driving the baffle to move in the vertical direction. The baffle driving component is used to drive the baffle to block the front side surface of the vertical push plate when the vertical push plate is at the second end position of the stroke interval, so as to prevent the vertical push plate from disturbing the floating direction of the hollow microspheres when moving towards the first end position of the stroke interval.

7. The foam metal production system based on batch feeding of hollow microspheres according to claim 6, characterized in that: The baffle component further includes a fixing plate fixedly installed on the bottom surface of the molten pool. A vertical guiding track is provided on the fixing plate, and the baffle is slidably matched with the vertical guiding track. The baffle driving component includes a baffle driving cylinder installed on the bottom surface of the molten pool, and the driving rod of the baffle driving cylinder is connected to the baffle.

8. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, characterized in that: A paddle component for evenly distributing the hollow microspheres is provided in the floating channel. The paddle component includes a propeller blade located in the floating channel and a paddle driving component drivingly connected to the propeller blade.

9. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, characterized in that: A molten metal feeding device for adding molten metal into the molten pool is further provided on the upper cover.

10. The foam metal production system based on batch feeding of hollow microspheres according to claim 1, characterized in that: An exhaust port for exhausting gas is further provided on the upper cover.

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