Metal powder sintering molding device

Abstract

The utility model belongs to powder metallurgy technical field discloses a kind of metal powder sintering forming device, including plate conveyor belt and the support frame fixed in its lower end, the plate conveyor belt upper end is fixed with heat preservation cover, the heat preservation cover bottom is provided with electric heating wire, the air hole is opened in the heat preservation cover upper end.This metal powder sintering forming device, by multiple structure design, the heating quality and energy economy of metal powder sintering are significantly optimized.One aspect, the electric heating wire of adoption "S" shape encircles design is evenly distributed in heat preservation cover inner wall, cooperate first flow fan, and the hot air flowing through electric heating wire is directionally transported to sintering area, ensure that temperature field distribution in heat preservation cover is uniform, effectively avoid the crack, density difference and other quality problems caused by local overheating or heating deficiency of metal powder blank, simultaneously, air circulation groove and second flow fan constitute efficient heat circulation system, and hot air is backflowed to circulation groove on both sides and reheated for use, and the disorderly loss of heat is reduced.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, specifically to a metal powder sintering and forming device. Background Technology

[0002] Metal powder sintering is one of the core processes for manufacturing metal parts in the field of powder metallurgy. It involves heating a metal powder blank at a specific temperature, causing diffusion and fusion of powder particles to form a shaped part with a certain density and mechanical properties. This process is widely used in high-end equipment fields such as aerospace, automotive manufacturing, and precision machinery due to its advantages such as the ability to directly manufacture complex-shaped parts, high material utilization, and near-net-shape forming. However, existing metal powder sintering equipment still has the following shortcomings in practical applications.

[0003] An existing powder metallurgy sintering device, as described in Chinese patent application number CN202310535403.5, includes a main body mechanism, a connecting mechanism, an adjusting mechanism, and a cooling mechanism. The connecting mechanism is located at the inner end of the main body mechanism, the adjusting mechanism is located to the right of the connecting mechanism, and the cooling mechanism is located above the adjusting mechanism. The adjusting mechanism includes an electric heating tube, a driving component, a lead screw, a movable block, a mounting frame, a sintering frame, a positioning plate, a positioning hole, a locking block, and a sliding groove frame. The driving component is movably mounted below the electric heating tube, and the lead screw is fixedly mounted on the transmission end of the driving component. However, existing metal powder sintering devices cannot achieve continuous operation, have low overall efficiency, and are inconvenient to operate.

[0004] Therefore, we propose a metal powder sintering and forming apparatus to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a metal powder sintering and forming device to solve the problems mentioned in the background art, such as the inability of existing metal powder sintering devices to achieve continuous operation, low overall working efficiency, and inconvenience of operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metal powder sintering and forming device, comprising a plate conveyor belt and a support frame fixed at its lower end: The upper end of the plate conveyor belt is fixed with a heat insulation cover, the bottom of the heat insulation cover is provided with an electric heating wire, the upper end of the heat insulation cover is provided with a vent hole, and the inside of the heat insulation cover is provided with an air circulation groove. The upper end of the air circulation groove is provided with a first guide fan, and the lower end of the air circulation groove is provided with a second guide fan. The heat insulation cover is provided with a partition on the side, and the lower end of the partition is connected to a sealing curtain. The plate conveyor belt is provided with a positioning frame on the right side, and a cooling fan is provided inside the positioning frame.

[0007] Preferably, the heat insulation cover has openings on both sides, the heating wire is fixed to the inner wall of the heat insulation cover, and the heating wire is arranged in an "S" shape.

[0008] Using the above technical solution, heating can be achieved through the design of the heating wire, and the heating wire can be used to sinter metal powder. At the same time, the S-shaped design of the heating wire can further improve the heating uniformity.

[0009] Preferably, the vents are distributed in an equidistant array, the lower end of the first guide fan penetrates the lower end of the air circulation slot, and the first guide fan array is arranged.

[0010] Using the above technical solution, the first guide fan can transport the air inside the air circulation tank downward through the vent, and the air flows through the heating wire during the transport process to heat the air.

[0011] Preferably, the second guide fan is embedded inside the air circulation slot, the second guide fan is symmetrically distributed on both sides of the air circulation slot, and the second guide fan array is distributed.

[0012] By adopting the above technical solution, the hot air can be circulated inside the air circulation tank through the cooperation of two sets of second guide fans and the first guide fan. The air inside the heat preservation cover flows into the air circulation tank from both sides and flows upward inside the air circulation tank. It is then further guided downward by the first guide fan and heated by the heating wire.

[0013] Preferably, the partitions are symmetrically distributed on both sides of the heat insulation cover, and the lower end of the partitions is engaged with the sealing curtain, wherein the length of the sealing curtain on both sides is greater than the length in the middle.

[0014] By adopting the above technical solution, the sealing curtain can be fixed by the partition, and the sealing curtain can block and seal the openings on both sides of the heat insulation cover, thereby reducing heat loss and energy waste.

[0015] Preferably, the positioning frame is fixed to the plate conveyor belt on both sides, and an installation groove is opened inside the positioning frame. The cooling fan is fixed to the inner wall of the installation groove, and the cooling fan array is distributed.

[0016] Using the above technical solution, multiple sets of cooling fans can be installed through the positioning frame. After the workpiece is conveyed to the outside of the heat insulation cover by the plate conveyor belt, the cooling fans can be used to achieve rapid heat dissipation and cooling.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the metal powder sintering molding device; 1. The heating quality and energy economy of metal powder sintering are significantly optimized through multiple structural designs. On the one hand, the heating wires with an "S"-shaped surround design are evenly distributed on the inner wall of the insulation cover. In conjunction with the first guide fan, the hot air flowing through the heating wires is directionally transported to the sintering area, ensuring a uniform temperature field distribution within the insulation cover. This effectively avoids quality problems such as cracks and density differences in the metal powder blank caused by local overheating or underheating. At the same time, the air circulation tank and the second guide fan form a highly efficient heat circulation system. Hot air flows back to the circulation tank through both sides for reheating and reuse, reducing disorderly heat loss. Meanwhile, the symmetrically distributed partitions on both sides and the non-equal length sealing curtains form a precise seal for the opening of the insulation cover, further reducing heat loss at the opening, significantly improving energy utilization efficiency, and reducing production energy consumption. 2. The structural design of the device is fully adapted to the needs of continuous production, which greatly improves the overall production efficiency. The plate conveyor belt realizes the continuous transportation of metal powder blanks, which allows them to complete the heating, sintering and cooling and shaping processes in sequence without interrupting the operation. After sintering, the blanks are directly transported to the positioning frame area. Multiple arrays of cooling fans form a directional strong airflow through the mounting slots, which quickly reduces the temperature of the blanks and solves the problem of low efficiency of traditional natural cooling or simple air cooling, significantly shortening the cooling and shaping time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the positioning frame and cooling fan structure of this utility model; Figure 4 This is a schematic diagram of the structure of the heat insulation cover and heating wire of this utility model; Figure 5 This is a schematic diagram of the partition and sealing curtain structure of this utility model; Figure 6 This is a schematic diagram of the air circulation tank and the first guide fan of this utility model.

[0019] In the diagram: 1. Plate conveyor belt; 2. Support frame; 3. Insulation cover; 4. Heating wire; 5. Ventilation hole; 6. First guide fan; 7. Air circulation slot; 8. Second guide fan; 9. Partition plate; 10. Sealing curtain; 11. Positioning frame; 12. Mounting slot; 13. Cooling fan. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1, please refer to Figure 1-6 This utility model provides a technical solution: a metal powder sintering molding device, including a plate conveyor belt 1 and a support frame 2 fixed at its lower end. The plate conveyor belt 1 is made of 304 stainless steel chain plates spliced ​​together, with a chain plate thickness of 2mm. Adjacent chain plates are hinged by pins to ensure stability and wear resistance during conveying. An insulation cover 3 is fixed to the upper end of the plate conveyor belt 1. The insulation cover 3 adopts a composite structure of double-layer stainless steel plates sandwiched with insulation cotton. The outer layer is a 0.8mm thick cold-rolled steel plate, the inner layer is a 0.5mm thick mirror stainless steel plate, and the middle is filled with 50mm thick aluminum silicate insulation cotton, with an insulation coefficient ≤0.03W / ( This design effectively reduces heat loss. A heating wire 4, made of nickel-chromium alloy with a diameter of 3mm, is installed at the bottom of the insulation cover 3. Its rated power is adjustable from 1-3kW. The heating wire 4 is fixed to the inner wall of the insulation cover 3 using high-temperature resistant ceramic insulators, with a fixing point spacing of 300mm to ensure secure installation. The insulation cover 3 has openings on both sides, and the heating wire 4 is fixed to the inner wall of the insulation cover 3 in an "S"-shaped loop design. Materials are conveyed into the insulation area through a plate conveyor belt 1 with one opening on one side of the insulation cover 3. At this time, the heating wire 4 is energized and heats up, heating the material through both thermal radiation and thermal convection. The sealed structure of the insulation cover 3 effectively reduces heat loss to the outside, keeping the temperature within the insulation area within the set range.

[0022] The insulation cover 3 has a vent 5 at its upper end, and an air circulation groove 7 is provided inside the insulation cover 3. A first guide fan 6 is provided at the upper end of the air circulation groove 7, and a second guide fan 8 is provided at the lower end of the air circulation groove 7. Both the first guide fan 6 and the second guide fan 8 are high-temperature resistant fans. The vent 5 are distributed in an equidistant array. The lower end of the first guide fan 6 penetrates the lower end of the air circulation groove 7, and the first guide fans 6 are arranged in an array. The second guide fans 8 are embedded inside the air circulation groove 7 and are symmetrically distributed on both sides of the air circulation groove 7, and the second guide fans 8 are arranged in an array. When the device is running, the hot air generated by the heating wire 4 forms a basic temperature field inside the insulation cover 3. At this time, the first guide fan 6 starts and discharges the air in the air circulation groove 7 through the vent 5. The air flows in the gap of the heating wire 4 to achieve heating and accelerate the heat transfer efficiency to the material. The second guide fan 8 runs synchronously, drawing in the air in the heat insulation cover 3 from both sides of the air circulation groove 7. After being heated by the circulation groove, the air is sent back into the airflow circulation system. This air circulation structure can improve the temperature uniformity inside the heat insulation cover 3.

[0023] The insulation cover 3 has partitions 9 on its sides, with the lower ends of the partitions 9 connected to sealing curtains 10. The partitions 9 are symmetrically distributed on both sides of the insulation cover 3, and their lower ends engage with the sealing curtains 10. The sealing curtains 10 are connected to the lower ends of the partitions 9 via a slot structure. The slots are custom-made from aluminum alloy profiles with a "C"-shaped cross-section and are fixed to the lower ends of the partitions 9 with rivets. The length of the sealing curtains 10 on both sides is greater than its middle length. To accommodate material inflow and outflow, the sealing curtains 10 adopt an asymmetrical length design, with the length on both sides being 150mm longer than the middle length, forming a wave-shaped structure that is "lower in the middle and higher on both sides." When the device is running, the sealing curtains 10 naturally droop under their own weight, forming a flexible seal with the surface of the plate conveyor belt 1. Combined with the shielding effect of the extended sections on both sides, the effective sealing area of ​​the openings on both sides of the insulation cover 3 can be increased by more than 60%. When material passes through, the sealing curtains 10 adapt to the material's contour and quickly return to their original shape after the material passes through, achieving a dynamic sealing effect.

[0024] A positioning frame 11 is installed on the right side of the plate conveyor belt 1, and a cooling fan 13 is installed inside the positioning frame 11. The positioning frame 11 is fixed to the plate conveyor belt 1 on both sides, and an installation groove 12 is opened inside the positioning frame 11. The cooling fan 13 is fixed to the inner wall of the installation groove 12, and the cooling fans 13 are distributed in an array. After the material has been heated in the heating area of ​​the heat preservation cover 3, it is conveyed with the plate conveyor belt 1 to the bottom of the positioning frame 11 on the right side. At this time, the cooling fan 13 starts, draws in cold air from the outside, and forms a directional airflow after being pressurized by the fan and blows it onto the surface of the material. Depending on the characteristics of the material, the fan speed can be adjusted by the control system. For easily deformable materials, low-speed cold air (wind speed 1-2m / s) is used for slow cooling, and high-speed cold air (wind speed 3-5m / s) is used for forced cooling for materials that need to be quickly shaped.

[0025] Example 2: This utility model provides another technical solution. The difference between this example and Example 1 is that a humidity sensor is installed inside the air circulation tank 7 for monitoring, and exhaust valves are installed at the lower ends of both sides of the insulation cover 3 corresponding to the second guide fan 8. When the humidity inside the insulation cover exceeds the set threshold, the exhaust valves open, and the second guide fan 8 drives the humid air inside the insulation cover to be discharged directly through the exhaust valves, keeping the air inside the insulation cover dry and controlling the fluctuation range of the material moisture content within ±2%.

[0026] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal powder sintering and forming apparatus, comprising a plate conveyor belt (1) and a support frame (2) fixed at its lower end, characterized in that: The upper end of the plate conveyor belt (1) is fixed with a heat insulation cover (3), the bottom of the heat insulation cover (3) is provided with an electric heating wire (4), the upper end of the heat insulation cover (3) is provided with a ventilation hole (5), and the inside of the heat insulation cover (3) is provided with an air circulation groove (7). The upper end of the air circulation groove (7) is provided with a first guide fan (6), and the lower end of the air circulation groove (7) is provided with a second guide fan (8). The heat insulation cover (3) has a partition (9) on its side, and the lower end of the partition (9) is connected to a sealing curtain (10). The plate conveyor belt (1) has a positioning frame (11) on its right side, and a cooling fan (13) is installed inside the positioning frame (11).

2. The metal powder sintering and forming apparatus according to claim 1, characterized in that: The heat insulation cover (3) has openings on both sides, and the heating wire (4) is fixed to the inner wall of the heat insulation cover (3), with the heating wire (4) arranged in an "S" shape.

3. The metal powder sintering and forming apparatus according to claim 1, characterized in that: The ventilation holes (5) are distributed in an equidistant array, and the lower end of the first guide fan (6) penetrates the lower end of the air circulation groove (7), and the first guide fan (6) is arranged in an array.

4. The metal powder sintering and forming apparatus according to claim 1, characterized in that: The second guide fan (8) is embedded inside the air circulation groove (7). The second guide fan (8) is symmetrically distributed on both sides of the air circulation groove (7) and the second guide fan (8) is distributed in an array.

5. The metal powder sintering and forming apparatus according to claim 1, characterized in that: The partition (9) is symmetrically distributed on both sides of the heat insulation cover (3), and the lower end of the partition (9) is engaged with the sealing curtain (10). The length of the two sides of the sealing curtain (10) is greater than the length of the middle part.

6. The metal powder sintering and forming apparatus according to claim 1, characterized in that: The positioning frame (11) is fixed to the plate conveyor belt (1) on both sides, and the positioning frame (11) has an installation groove (12) inside. The cooling fan (13) is fixed to the inner wall of the installation groove (12), and the cooling fan (13) is distributed in an array.

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