A powder pressing and molding equipment for powder metallurgy

Abstract

This invention relates to the field of powder metallurgy technology and discloses a powder pressing and molding equipment for powder metallurgy, including a press. The press also includes a powder supply device, which comprises a particle adsorption structure and a circulation structure. The particle adsorption structure includes a feed hopper, an output shaft, a placement box, and a feeding cylinder. The feed hopper is located on the left side of the press. The output shaft rotates through the bottom of the feed hopper. The placement box is fixedly connected above the feed hopper, and the feeding cylinder is fixedly connected above the placement box. During flow, the adsorption efficiency of activated carbon is improved, enabling more effective adsorption of impurity particles. Simultaneously, the rotation of the output shaft drives the stirring paddle to rotate, thereby stirring the powder and dispersing the powder and impurity particles, making it easier for the activated carbon to adsorb, further improving the adsorption efficiency. This avoids the problem of insufficient density and poor processing effect after the powder is pressed into blocks due to excessive impurities in the powder during processing.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy technology, specifically to a powder pressing and molding equipment for powder metallurgy. Background Technology

[0002] Powder metallurgy is a process that produces parts by pressing and sintering metal or alloy powders. This process can be used to produce parts with high precision and complex shapes. Powder metallurgy pressing equipment is usually a processing equipment that uses a stamping device to press metal powder in a mold to form it. Existing powder metallurgy pressing equipment does not have the function of removing impurity particles from the metal powder, and the pressed metal blocks are often of poor quality and have no utilization value.

[0003] Patent CN201611018506.0 discloses a servo press for powder metallurgy pressing and forming. This patent features fewer transmission components, smaller transmission errors, and higher precision. It simplifies the structure by using a quick-change mold fixture, eliminating the need for a mold frame. Both the upper and lower molds are driven by actuators, allowing for the design of motion curves for the upper and lower molds based on the powder metallurgy pressing process, thus meeting the pressing requirements of different products. The lower mold has a central core rod to meet the pressing requirements of the central inner hole. The lower mold is synchronously driven by two symmetrically arranged actuators, increasing the pressing force. The upper mold has three pressure sensors, enabling combined force and displacement control. While this patent solves the aforementioned problems, it still fails to remove impurities from the metal powder, making it difficult to press, resulting in low pressing efficiency and poor forming quality. Therefore, it is necessary to design a powder metallurgy pressing and forming device that can adsorb impurities in the powder, preventing excessive impurities from reducing quality and thus improving processing quality. Summary of the Invention

[0004] The purpose of this invention is to provide a powder pressing and molding equipment for powder metallurgy to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a powder pressing and molding equipment for powder metallurgy, comprising a press, the press further comprising a powder supply device, the powder supply device comprising a particle adsorption structure and a circulation structure, the particle adsorption structure comprising a feed hopper, an output shaft, a placement box, and a feeding cylinder, the feed hopper being disposed on the left side of the press, the output shaft rotating through the bottom end of the feed hopper, the placement box being fixedly connected above the feed hopper, and the feeding cylinder being fixedly connected above the placement box, the circulation structure comprising a discharge trough, a discharge sleeve, a loading hopper, a spiral shaft, and a stirring paddle, the discharge trough being opened at the bottom end of the placement box, the discharge sleeve... The feeding barrel is fixedly connected to the bottom of the placement box, the feeding barrel is fixedly connected to the right side of the placement box, the spiral shaft is rotatably connected to the bottom of the feeding barrel, the stirring paddle is fixedly connected to the surface of the output shaft, a motor is installed above the output shaft, the output shaft rotates through the bottom end of the placement box, the discharging sleeve is fixedly connected to the outside of the feeding barrel, a spiral discharging plate is provided on the inner side of the discharging sleeve and the spiral discharging plate is fixedly connected to the surface of the feeding barrel, the feeding barrel is fixedly connected to the bottom right side of the discharging sleeve, the spiral shaft rotates through the top end of the feeding barrel, the output shaft and the spiral shaft are connected by synchronous belt drive, and a discharging port is opened at the bottom end of the feeding barrel. The bottom of the placement box has a mesh opening, and the surface of the feeding hopper also has a mesh opening. Powder is poured into the placement box, and it enters the feeding hopper through the small mesh openings at the bottom of the placement box. Activated carbon is then poured into the placement box from the feeding cylinder. The activated carbon adsorbs impurities in the powder through the small mesh openings at the bottom of the placement box, preventing excessive impurities from reducing quality and thus improving processing quality. After entering the placement box, the activated carbon enters the feeding sleeve from the feeding trough and slides downwards in a spiral shape, thus distributing evenly on the surface of the feeding hopper. Adsorption occurs through the small mesh openings on the surface of the feeding hopper, expanding the adsorption area and improving adsorption efficiency. The activated carbon slides to the feeding sleeve... When the activated carbon reaches the bottom of the feeding barrel, it is squeezed into the bottom of the feeding barrel. At this time, the motor is started, and the motor drives the output shaft to rotate. The output shaft drives the spiral shaft to rotate, and the spiral shaft pushes the activated carbon upward and back into the placement box. It then falls from the placement box back into the feeding barrel, achieving continuous flow. During the flow, the adsorption efficiency of the activated carbon is improved, and it can more effectively adsorb impurity particles. At the same time, the rotation of the output shaft drives the agitator to rotate, which agitates the powder and disperses the powder and impurity particles, making it easier for the activated carbon to adsorb. This further improves the adsorption efficiency and avoids the problem that too many impurities in the powder during processing lead to insufficient density after the powder is pressed into blocks, resulting in poor processing effect.

[0006] According to the above technical solution, a powder filling device is provided below the feeding hopper. The powder filling device includes a feeding structure and a material equalization structure. The feeding structure includes a bevel gear reversing device, a conveying channel, a conveyor belt, and a partition. The bevel gear reversing device is driven and connected to the bottom end of the output shaft. The conveying channel is fixedly connected to the bottom of the feeding hopper. The conveyor belt is driven and connected to both sides of the bevel gear reversing device. The partition is fixedly connected to the surface of the conveyor belt. The material equalization structure includes a lower die, a convex plate, a limiting frame, a vibration spring, and a snap-fit ​​slider. The lower die is located at the bottom of the press. The convex plate is fixedly connected to the front and rear ends of the left side of the lower die. The limiting frame is sleeved on the outside of the lower die. The vibration spring is fixedly connected to the inside of the limiting frame. The snap-fit ​​slider is slidably connected to the inside of the limiting frame. The limiting frame has slots on its front and rear sides. Slide plates are provided at the four corners of the limiting frame, and the snap-fit ​​slider is slidably connected to the slide plates on the inner side of the slide plates. The vibration spring is connected to both sides of the lower die. The fixed connection and the rotation of the output shaft drive the internal gears of the bevel gear commutator to rotate. The bevel gear commutator drives the conveyor belt to rotate. The conveyor belt catches the powder falling from the feed hopper and transports the powder to the lower mold. A partition is set on the conveyor belt at intervals to separate the powder. Because the powder will accumulate on one side and then slide down when poured into the lower mold, if too much powder is poured in at once, it is easy to overflow the lower mold and cause waste. Therefore, the partition allows the powder to enter the lower mold at intervals, allowing the powder to settle for a certain period of time and preventing it from overflowing. With sufficient settling time, the powder can be distributed more evenly, which is easier to press. After the partition pours the powder into the lower mold, it touches the convex plate on the left side of the lower mold and pulls the convex plate to cause the lower mold to shift. After the lower mold shifts, it squeezes the vibration spring. The reaction force causes the lower mold to vibrate left and right. The vibration of the lower mold can evenly shake the powder inside, making the powder filling more uniform and easier to press. This results in a more uniform density distribution of the pressed product.

[0007] According to the above technical solution, demolding devices are provided on both sides of the limiting frame. Each demolding device includes a pushing structure and a scraping structure. The pushing structure includes an air collection tank, a cylinder, a push plate, and a lifting platform. The air collection tank is located below the press, and the cylinder is fixedly connected above it. The push plate is hinged to the right side of the cylinder, and the lifting platform is fixedly connected to the bottom of the press. The scraping structure includes a support platform, a scraper, a discharge ramp, and a limiting plate. The support platform is fixedly connected to the left side of the limiting plate, and the scraper is slidably connected above the support platform. The discharge ramp is fixedly connected to the right side of the limiting frame, and the limiting plate is fixedly connected to both sides of the discharge ramp. The cylinder is fixedly connected to the top of the support platform, the scraper is fixedly connected to the right side of the push plate, and the lifting platform is fixedly connected to the bottom end of the lower mold. The lifting platform is equipped with a lifting plate in the middle, which is slidably connected to the inner side of the lower mold. After the powder is pressed and formed, it will be pushed above the lower mold by the lifting platform. At this time, the gas collection tank will supply gas into the cylinder, the cylinder will push the push plate, and the push plate will push the metal block, pushing the metal block out of the lower mold range. The push plate makes it easier for the metal block to be demolded, which facilitates material discharge and improves processing efficiency. When the push plate moves, it will drive the shovel plate to move together. The shovel plate can shovel into the bottom surface of the metal block to prevent the metal block from sticking too tightly to the lifting platform, which would make it difficult to demold, further improving demolding efficiency. After the shovel plate shovels up the metal block, the push plate pushes the metal block. When the push plate pushes the metal block to the discharge ramp, it will immediately tilt downward. At this time, the metal block will slide down the discharge ramp under the influence of gravity, completing the discharge and avoiding material blockage, further improving the discharge efficiency.

[0008] According to the above technical solution, a vacuum deoxygenation device is installed below the support platform. The vacuum deoxygenation device includes an air intake structure and a dustproof blowing structure. The air intake structure includes an external frame, a vacuum pump, and a valve. The external frame is fixedly connected to the outside of the press. The vacuum pump is fixedly connected to the bottom of the external frame. The valve is fixedly connected to the right side of the gas collection tank. The dustproof blowing structure includes an air supply pipe, a torsion spring, a torsion airbag, and a dustproof sleeve. The air supply pipe is fixedly connected to the right side of the valve. The torsion spring is fixedly connected to the middle of the external frame. The torsion airbag is fixedly connected to the inside of the torsion spring. The dustproof sleeve is fixedly connected to the middle of the external frame. The air supply pipe passes through the middle of the external frame and the inside of the torsion spring. The air supply pipe is fixedly connected to the bottom end of the torsion airbag. The torsion spring is fixedly connected to the bottom of the support platform. The feed hopper is fixedly connected to the top of the external frame. The press is fixedly connected to the top of the external frame. The support platform is fixedly connected to the middle of the external frame. The surface of the bladder has mesh openings. Before processing, the vacuum pump is started, drawing air from the middle of the outer frame and inputting it into the air collection tank until the press is in a vacuum state. The vacuum pump draws air to prevent the powder from oxidizing after contact with air during pressing. When the vacuum pump draws air, it passes through the dustproof sleeve filter before entering the vacuum pump, preventing solids in the air or loose powder from clogging the vacuum pump, thus improving the air intake efficiency. After processing, the air valve is opened, and the oxygen in the air collection tank flows from the air valve into the air supply pipe, and then from the air supply pipe into the twisting air bladder. The twisting air bladder is in a twisted state before air intake. When the air intake expands, the twisting air bladder will twist open instantly and eject the airflow. When the airflow blows onto the dustproof sleeve, it can disperse the solid particles clogging the dustproof sleeve, allowing the dustproof sleeve to filter the air again and return to a smooth airflow state, further improving the air intake efficiency. This allows the device to quickly deoxygenate and prevent powder oxidation during each processing.

[0009] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0010] This invention, by incorporating a feeding trough, a feeding sleeve, a feeding hopper, and a spiral shaft, enhances the adsorption efficiency of activated carbon during flow, enabling more effective adsorption of impurity particles. Furthermore, the rotation of the output shaft simultaneously drives the stirring paddle, which in turn stirs the powder, dispersing the powder and impurity particles, making it easier for the activated carbon to adsorb, further improving adsorption efficiency. This avoids the problem of insufficient density and poor processing results after the powder is pressed into blocks due to excessive impurities during processing.

[0011] This invention, by setting up a convex plate, a limiting frame, a vibration spring, and a snap-fit ​​slider, allows the partition plate to touch the convex plate on the left side of the lower mold after the powder is poured into it. The convex plate is pulled and causes the lower mold to shift. After the lower mold shifts, it squeezes the vibration spring, and the reaction force causes the lower mold to vibrate left and right. The vibration of the lower mold can shake the powder inside evenly, making the powder filling more uniform and easier to press, resulting in a more uniform density distribution of the pressed finished product.

[0012] This invention, by setting up a support platform, a shovel plate, a discharge ramp, and a limiting plate, allows the shovel plate to scoop into the bottom surface of the metal block, preventing the metal block from sticking too tightly to the lifting platform and making demolding difficult, thus further improving demolding efficiency. After the shovel plate lifts the metal block, the push plate pushes the metal block. When the push plate pushes the metal block to the discharge ramp, it will immediately tilt downwards. At this time, the metal block slides down the discharge ramp under the influence of gravity, completing the discharge and avoiding material blockage, thus further improving the discharge efficiency.

[0013] This invention incorporates an air supply pipe, a torsion spring, a torsion airbag, and a dustproof sleeve. The torsion airbag is in a screw-on state before air intake. When the air intake expands, the torsion airbag instantly unscrews and ejects airflow. When the airflow reaches the dustproof sleeve, it disperses the solid particles blocking the sleeve, allowing the sleeve to filter the air again and return to a smooth airflow state. This further improves the air intake efficiency and enables the device to quickly remove oxygen and prevent powder oxidation during each processing cycle. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the three-dimensional integral structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention in cross-section of a triaxial plane;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the powder supply device of the present invention in cross-section of the three axes;

[0019] Figure 4 This is the present invention. Figure 3 A magnified structural diagram of A in the middle;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the powder filling device of the present invention in a cross-sectional view of the three axes;

[0021] Figure 6 This is the present invention. Figure 5 A magnified structural diagram of B in the diagram;

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of the demolding device of the present invention in cross-section of the three axes;

[0023] Figure 8 This is the present invention. Figure 7 A magnified structural diagram of C;

[0024] Figure 9 This is a three-dimensional structural diagram of the front side of the vacuum deoxygenation device of the present invention;

[0025] In the diagram: 1. Press; 2. Powder feeding device; 21. Feed hopper; 22. Output shaft; 23. Placement box; 24. Feed cylinder; 25. Discharge chute; 26. Discharge sleeve; 27. Loading hopper; 28. Spiral shaft; 29. ​​Agitator; 3. Powder filling device; 31. Bevel gear reversing device; 32. Conveying channel; 33. Conveyor belt; 34. Partition plate; 35. Lower mold; 36. Convex plate; 37. Limiting plate. 38. Position frame; 39. Vibration spring; 4. Snap-fit ​​slider; 5. Demolding device; 6. Air collection tank; 7. Cylinder; 8. Push plate; 9. Lifting platform; 10. Support platform; 11. Shovel plate; 12. Material discharge slant plate; 23. Limiting plate; 44. Vacuum deoxygenation device; 55. External frame; 66. Vacuum pump; 77. Air valve; 88. Air supply pipe; 99. Torsion spring; 100. Torsion airbag; 11. Dustproof sleeve. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-4One embodiment of the present invention is: a powder pressing and molding equipment for powder metallurgy, including a press 1, the press 1 further including a powder supply device 2, the powder supply device 2 including a particle adsorption structure and a circulation structure, the particle adsorption structure including a feed hopper 21, an output shaft 22, a placement box 23, and a feed cylinder 24, the feed hopper 21 is located on the left side of the press 1, the output shaft 22 rotates through and exits the bottom end of the feed hopper 21, the placement box 23 is fixedly connected above the feed hopper 21, and the feed cylinder 24 is fixedly connected above the placement box 23. Powder is poured into the placement box 23, and the powder will enter the feed hopper 21 through the small mesh at the bottom end of the placement box 23. Then activated carbon is poured from the feed cylinder 24 into the placement box 23, and the activated carbon passes through the placement box. The fine mesh at the bottom of the 23 box adsorbs impurities in the powder, preventing excessive impurities from reducing quality and thus improving processing quality. The circulation structure includes a feeding trough 25, a feeding sleeve 26, a feeding bucket 27, a spiral shaft 28, and a stirring paddle 29. The feeding trough 25 is located at the bottom of the placement box 23. The feeding sleeve 26 is fixedly connected to the bottom of the placement box 23. The feeding bucket 27 is fixedly connected to the right side of the placement box 23. The spiral shaft 28 is rotatably connected to the bottom of the feeding bucket 27. The stirring paddle 29 is fixedly connected to the surface of the output shaft 22. A motor is installed above the output shaft 22, which rotates through the bottom of the placement box 23. The feeding sleeve 26 is fixedly connected to the outside of the feeding bucket 21. A spiral feeding plate is provided on the inner side of the feeding barrel 21 and is fixedly connected to the surface of the feeding barrel 21. The upper feeding barrel 27 is fixedly connected to the bottom right side of the lower feeding sleeve barrel 26. The spiral shaft 28 rotates and passes through the top of the upper feeding barrel 27. The output shaft 22 is connected to the spiral shaft 28 by a synchronous belt drive. The bottom end of the feeding barrel 21 has a feeding port, and the bottom end of the placement box 23 has a mesh. The surface of the feeding barrel 21 has a mesh. After entering the placement box 23, the activated carbon enters the lower feeding sleeve barrel 26 from the feeding trough 25 and slides downward in a spiral shape, thus being evenly distributed on the surface of the feeding barrel 21. It is adsorbed through the fine mesh on the surface of the feeding barrel 21, which expands the adsorption area and improves the adsorption efficiency. The activated carbon slides to the lower feeding sleeve barrel 26. When the material reaches the bottom, it will be squeezed into the bottom of the feeding hopper 27. At this time, the motor is started, and the motor drives the output shaft 22 to rotate. The output shaft 22 drives the spiral shaft 28 to rotate. The spiral shaft 28 pushes the activated carbon upward and back into the placement box 23. It then falls from the placement box 23 into the discharge sleeve 26 to achieve continuous flow. During the flow, the adsorption efficiency of the activated carbon is improved, and it can more effectively adsorb impurity particles. At the same time, the rotation of the output shaft 22 drives the stirring paddle 29 to rotate, so that the stirring paddle 29 stirs the powder, disperses the powder and impurity particles, and makes it easier for the activated carbon to adsorb, further improving the adsorption efficiency. This avoids the problem that too many impurities in the powder during processing lead to insufficient density after the powder is pressed into blocks, resulting in poor processing effect.

[0028] Working principle: Powder is poured into placement box 23, and enters feed hopper 21 through the fine mesh at the bottom of placement box 23. Activated carbon is then poured into placement box 23 from feed cylinder 24. The activated carbon adsorbs impurities in the powder through the fine mesh at the bottom of placement box 23, preventing excessive impurities from reducing quality and thus improving processing quality. After entering placement box 23, activated carbon enters feed sleeve 26 from feed chute 25, sliding downwards in a spiral shape, thus evenly distributing on the surface of feed hopper 21. Adsorption is achieved through the fine mesh on the surface of feed hopper 21, expanding the adsorption area and improving adsorption efficiency. When the activated carbon slides to the bottom of feed sleeve 26, it is squeezed... The activated carbon is fed into the bottom of the feeding hopper 27. At this time, the motor is started, and the motor drives the output shaft 22 to rotate. The output shaft 22 drives the spiral shaft 28 to rotate, and the spiral shaft 28 pushes the activated carbon upward and back into the placement box 23. It then falls from the placement box 23 into the feeding sleeve 26 to achieve continuous flow. During the flow, the adsorption efficiency of the activated carbon is improved, and it can more effectively adsorb impurity particles. At the same time, the rotation of the output shaft 22 drives the stirring paddle 29 to rotate, so that the stirring paddle 29 stirs the powder, disperses the powder and impurity particles, and makes it easier for the activated carbon to adsorb, further improving the adsorption efficiency. This avoids the problem that too many impurities in the powder during processing lead to insufficient density after the powder is pressed into blocks, resulting in poor processing effect.

[0029] Please see Figure 5-6Based on the above embodiments, another embodiment of the present invention includes a powder filling device 3. The powder filling device 3 includes a feeding structure and a material equalization structure. The feeding structure includes a bevel gear reversing device 31, a conveying channel 32, a conveyor belt 33, and a partition 34. The bevel gear reversing device 31 is driven to the bottom end of the output shaft 22. The conveying channel 32 is fixedly connected to the bottom of the feed hopper 21. The conveyor belt 33 is driven to both sides of the bevel gear reversing device 31. The partition 34 is fixedly connected to the surface of the conveyor belt 33. The rotation of the output shaft 22 drives the bevel gear to reverse. The internal gears of device 31 rotate, and the bevel gear reversing device 31 drives the conveyor belt 33 to rotate. The conveyor belt 33 catches the powder falling from the feed hopper 21 and transports the powder to the lower mold 35. A partition 34 is set on the conveyor belt 33 at intervals to separate the powder. Because the powder will accumulate on one side and then slide down when poured into the lower mold 35, if too much powder is poured in at once, it is easy to overflow the lower mold 35 and cause waste. Therefore, the partition 34 can make the powder enter the lower mold 35 at intervals, allowing the powder a certain amount of settling time. The material will no longer overflow from the lower mold 35, and with sufficient settling time, the powder can be distributed more evenly, facilitating pressing. The material distribution structure includes the lower mold 35, the protruding plate 36, the limiting frame 37, the vibration spring 38, and the snap-fit ​​slider 39. The lower mold 35 is located at the bottom of the press 1. The protruding plate 36 is fixedly connected to the front and rear ends of the left side of the lower mold 35. The limiting frame 37 is sleeved on the outside of the lower mold 35. The vibration spring 38 is fixedly connected to the inside of the limiting frame 37. The snap-fit ​​slider 39 is slidably connected to the inside of the limiting frame 37. The limiting frame 37 has slots on the front and rear sides for limiting... The four corners of the frame 37 are provided with sliding plates and the locking slider 39 is slidably connected to the sliding groove opened on the inner side of the sliding plate. The vibration spring 38 is fixedly connected to both sides of the lower mold 35. After the partition plate 34 pours the powder into the lower mold 35, it will touch the convex plate on the left side of the lower mold 35 and pull the convex plate 36 to drive the lower mold 35 to shift. After the lower mold 35 shifts, it squeezes the vibration spring 38. The reaction force makes the lower mold 35 vibrate left and right. The vibration of the lower mold 35 can shake the powder inside evenly, making the powder filling more uniform and easier to press, and making the density distribution of the pressed finished product more uniform.

[0030] Working principle: The output shaft 22 rotates, driving the internal gears of the bevel gear commutator 31 (HD09~HD28) to rotate. The bevel gear commutator 31 drives the conveyor belt 33 to rotate. The conveyor belt 33 catches the powder falling from the feed hopper 21 and transports the powder to the lower mold 35. A partition 34 is installed on the conveyor belt 33 at intervals to separate the powder. Because the powder will accumulate on one side and then slide down into the lower mold 35, if too much powder is poured in at once, it is easy for the powder to overflow into the lower mold 35, causing waste. Therefore, the partition 34 separates the powder. The powder is allowed to enter the lower mold 35 at intervals, allowing it a certain amount of settling time so that it will not overflow. With sufficient settling time, the powder can be distributed more evenly, making it easier to press. After the partition plate 34 pours the powder into the lower mold 35, it will touch the convex plate on the left side of the lower mold 35 and pull the convex plate 36 to cause the lower mold 35 to shift. After the lower mold 35 shifts, it squeezes the vibration spring 38, and the reaction force makes the lower mold 35 vibrate left and right. The vibration of the lower mold 35 can shake the powder inside evenly, making the powder filling more uniform and easier to press, resulting in a more uniform density distribution of the pressed product.

[0031] Please see Figure 7-9Based on the above embodiments, another embodiment of the present invention includes a demolding device 4. The demolding device 4 includes a pushing structure and a scraping structure. The pushing structure includes a gas collecting tank 41, a cylinder 42, a push plate 43, and a lifting platform 44. The gas collecting tank 41 is located below the press 1, the cylinder 42 is fixedly connected above the gas collecting tank 41, the push plate 43 is hinged to the right side of the cylinder 42, and the lifting platform 44 is fixedly connected to the bottom of the press 1. After the powder is pressed and formed, it will be pushed above the lower mold 35 by the lifting platform 44. At this time, the gas collecting tank 41 supplies gas into the cylinder 42, the cylinder 42 pushes the push plate 43, and the push plate 43 pushes the metal block, pushing the metal block out of the lower mold 35. The pushing of the push plate 43 makes it easier for the metal block to be demolded, which facilitates material discharge and improves processing. The efficient material-scraping structure includes a support platform 45, a scraper plate 46, a discharge ramp 47, and a limiting plate 48. The support platform 45 is fixedly connected to the left side of the limiting plate 48, the scraper plate 46 is slidably connected above the support platform 45, the discharge ramp 47 is fixedly connected to the right side of the limiting frame 37, and the limiting plate 48 is fixedly connected to both sides of the discharge ramp 47. A cylinder 42 is fixedly connected to the top of the support platform 45, the scraper plate 46 is fixedly connected to the right side of the push plate 43, and a lifting platform 44 is fixedly connected to the bottom end of the lower mold 35. A lifting plate is provided in the middle of the lifting platform 44 and is slidably connected to the inside of the lower mold 35. When the push plate 43 moves, it will drive the scraper plate 46 to move together. The scraper plate 46 can scrape into the bottom surface of the metal block to prevent the metal block from sticking too tightly to the lifting platform 44, which would make demolding difficult. The demolding efficiency is further improved. After the shovel plate 46 scoops up the metal block, the push plate 43 pushes the metal block. When the push plate 43 pushes the metal block onto the discharge ramp 47, it will immediately tilt downwards. At this time, the metal block slides down from the discharge ramp 47 under the influence of gravity, completing the discharge and avoiding material blockage, thus further improving the discharge efficiency. A vacuum deoxygenation device 5 is installed below the support platform 45. The vacuum deoxygenation device 5 includes an air intake structure and a dust prevention and blowing structure. The air intake structure includes an outer frame 51, a vacuum pump 52, and an air valve 53. The outer frame 51 is fixedly connected to the outside of the press 1. The vacuum pump 52 is fixedly connected to the bottom of the outer frame 51. The air valve 53 is fixedly connected to the right side of the gas collection tank 41. Before processing, the vacuum pump 52 is started, and the vacuum pump 52 draws air from the middle of the outer frame 51. Air is introduced into the air collection tank 41 until the press 1 is in a vacuum state. After the vacuum pump 52 draws in the air, it prevents the powder from oxidizing after contact with air during the pressing process. The dustproof blowing structure includes an air supply pipe 54, a torsion spring 55, a torsion airbag 56, and a dustproof sleeve 57. The air supply pipe 54 is fixedly connected to the right side of the air valve 53. The torsion spring 55 is fixedly connected to the middle of the outer frame 51. The torsion airbag is fixedly connected to the inside of the torsion spring 55. The dustproof sleeve 57 is fixedly connected to the middle of the outer frame 51. The air supply pipe 54 passes through the middle of the outer frame 51 and the inside of the torsion spring 55. The air supply pipe 54 is fixedly connected to the bottom end of the torsion airbag 56. The torsion spring 55 is fixedly connected to the bottom of the support platform 45. The feed hopper 21 is fixedly connected to the top of the outer frame 51.The press 1 is fixedly connected to the top of the outer frame 51, and the support platform 45 is fixedly connected to the middle of the outer frame 51. The surface of the twisting airbag 56 has mesh openings. When the vacuum pump 52 draws in air, the air passes through the dustproof sleeve 57 for filtration before entering the vacuum pump 52, preventing solid particles or loose powder from clogging the vacuum pump 52, thus improving suction efficiency. After processing, the air valve 53 is opened, and oxygen from the gas collection tank 41 flows from the air valve 53 into the gas delivery pipe 54, and then from the gas delivery pipe 54 into the twisting airbag 56. Before air intake, the twisting airbag 56 is in a screwed-up state. When the airbag expands, it instantly unscrews and ejects airflow. When the airflow reaches the dustproof sleeve 57, it disperses the solid particles clogging the dustproof sleeve 57, allowing the dustproof sleeve 57 to filter the air again and return to a smooth ventilation state, further improving suction efficiency. This ensures that the device can quickly remove oxygen during each processing cycle to prevent powder oxidation.

[0032] Working principle: After the powder is pressed into shape, it is pushed by the lifting platform 44 to the upper part of the lower mold 35. At this time, the gas collection tank 41 supplies gas to the cylinder 42. The cylinder 42 pushes the push plate 43, and the push plate 43 pushes the metal block, pushing the metal block out of the lower mold 35. The push of the push plate 43 makes it easier for the metal block to be demolded, which facilitates the discharge and improves the processing efficiency. When the push plate 43 moves, it will drive the shovel plate 46 to move together. The shovel plate 46 can shovel into the bottom surface of the metal block to prevent the metal block from sticking too tightly to the lifting platform 44, which would make it difficult to demold. This further improves the demolding efficiency. After the shovel plate 46 shovels up the metal block, the push plate 43 pushes the metal block. When the push plate 43 pushes the metal block to the discharge inclined plate 47, it will immediately tilt downward. At this time, the metal block slides down the discharge inclined plate 47 under the influence of gravity, completing the discharge and avoiding material blockage, which further improves the discharge efficiency.

[0033] Before processing, vacuum pump 52 is started. Vacuum pump 52 draws air from the middle of the outer frame 51 and inputs the air into the air collection tank 41 until the press 1 is in a vacuum state. After vacuum pump 52 draws in air, it prevents the powder from oxidizing after contact with air during the pressing process. When vacuum pump 52 draws in air, the air passes through the dustproof sleeve 57 for filtration before entering vacuum pump 52, preventing solids in the air or loose powder from clogging vacuum pump 52, thereby improving air intake efficiency. After processing is completed, the vacuum pump 52 is opened. Oxygen from the gas collection tank 41 flows from the gas valve 53 into the gas supply pipe 54, and then from the gas supply pipe 54 into the twisting air bag 56. The twisting air bag 56 is in a screwed-up state before air intake. When the air intake expands, the twisting air bag 56 will be screwed open instantly and eject airflow. When the airflow blows onto the dustproof sleeve 57, it can disperse the solid particles blocking the dustproof sleeve 57, allowing the dustproof sleeve 57 to filter the air again and return to a smooth airflow state, further improving the air intake efficiency and enabling the device to quickly remove oxygen and prevent powder oxidation during each processing.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 powder pressing and molding equipment for powder metallurgy, comprising a press (1), characterized in that: It also includes a powder supply device (2), which includes a particle adsorption structure and a circulation structure; The particle adsorption structure includes a feed hopper (21), an output shaft (22), a placement box (23), and a feed cylinder (24). The feed hopper (21) is located on the left side of the press (1). The output shaft (22) rotates through the bottom of the feed hopper (21). The placement box (23) is fixedly connected above the feed hopper (21), and the feed cylinder (24) is fixedly connected above the placement box (23). The circulation structure includes a feeding trough (25), a feeding sleeve (26), a feeding barrel (27), a spiral shaft (28), and a stirring paddle (29). The feeding trough (25) is located at the bottom of the placement box (23). The feeding sleeve (26) is fixedly connected to the bottom of the placement box (23). The feeding barrel (27) is fixedly connected to the right side of the placement box (23). The spiral shaft (28) is rotatably connected to the bottom of the feeding barrel (27). The stirring paddle (29) is fixedly connected to the surface of the output shaft (22). A motor is provided above the output shaft (22). The output shaft (22) rotates through the bottom end of the placement box (23). The feeding sleeve (26) is fixedly connected to the outside of the feeding barrel (21). A spiral feeding plate is provided on the inner side of the feeding sleeve (26) and the spiral feeding plate is fixedly connected to the surface of the feeding barrel (21). The feeding barrel (27) is fixedly connected to the bottom right side of the feeding sleeve (26). The spiral shaft (28) rotates through the top end of the feeding barrel (27). The output shaft (22) and the spiral shaft (28) are connected by a synchronous belt drive. The bottom end of the feeding barrel (21) is provided with a feeding port. The bottom end of the placement box (23) is provided with a mesh hole. The surface of the feeding barrel (21) is provided with a mesh hole.

2. The powder pressing and molding equipment for powder metallurgy according to claim 1, characterized in that: A powder filling device (3) is provided below the feed hopper (21). The powder filling device (3) includes a feeding structure and a material equalization structure. The feeding structure includes a bevel gear commutator (31), a conveying channel (32), a conveyor belt (33), and a partition (34). The bevel gear commutator (31) is driven to the bottom end of the output shaft (22). The conveying channel (32) is fixedly connected to the bottom of the feed hopper (21). The conveyor belt (33) is driven to both sides of the bevel gear commutator (31). The partition (34) The material distribution structure is fixedly connected to the surface of the conveyor belt (33). It includes a lower mold (35), a convex plate (36), a limiting frame (37), a vibration spring (38), and a snap-fit ​​slider (39). The lower mold (35) is set at the bottom of the press (1). The convex plate (36) is fixedly connected to the front and rear ends of the left side of the lower mold (35). The limiting frame (37) is sleeved on the outside of the lower mold (35). The vibration spring (38) is fixedly connected to the inside of the limiting frame (37). The snap-fit ​​slider (39) is slidably connected to the inside of the limiting frame (37).

3. The powder pressing and molding equipment for powder metallurgy according to claim 2, characterized in that: The limiting frame (37) has slots on both the front and rear sides. The limiting frame (37) has sliding plates at its four corners and the sliding block (39) is slidably connected to the sliding groove on the inner side of the sliding plate. The vibration spring (38) is fixedly connected to both sides of the lower mold (35).

4. The powder pressing and molding equipment for powder metallurgy according to claim 3, characterized in that: The limiting frame (37) is provided with demolding devices (4) on both sides. The demolding devices (4) include a pushing structure and a scraping structure. The pushing structure includes an air collection tank (41), a cylinder (42), a push plate (43), and a lifting platform (44). The air collection tank (41) is located below the press (1). The cylinder (42) is fixedly connected above the air collection tank (41). The push plate (43) is hinged to the right side of the cylinder (42). The lifting platform (44) is fixedly connected to the bottom of the press (1). The scraping structure includes a support platform (45), a scraper (46), a discharge ramp (47), and a limiting plate (48). The support platform (45) is fixedly connected to the left side of the limiting plate (48). The scraper (46) is slidably connected above the support platform (45). The discharge ramp (47) is fixedly connected to the right side of the limiting frame (37). The limiting plate (48) is fixedly connected to the left and right sides of the discharge ramp (47).

5. The powder pressing and molding equipment for powder metallurgy according to claim 4, characterized in that: The cylinder (42) is fixedly connected to the upper part of the support platform (45), the shovel plate (46) is fixedly connected to the right side of the push plate (43), the lifting platform (44) is fixedly connected to the bottom end of the lower mold (35), and a lifting plate is provided in the middle of the lifting platform (44) and the lifting plate is slidably connected to the inner side of the lower mold (35).

6. The powder pressing and molding equipment for powder metallurgy according to claim 5, characterized in that: A vacuum deoxygenation device (5) is provided below the support platform (45). The vacuum deoxygenation device (5) includes an air intake structure and a dustproof blowing structure. The air intake structure includes an outer frame (51), a vacuum pump (52), and a gas valve (53). The outer frame (51) is fixedly connected to the outside of the press (1). The vacuum pump (52) is fixedly connected to the bottom of the outer frame (51). The gas valve (53) is fixedly connected to the right side of the gas collection tank (41). The dustproof blowing structure includes an air supply pipe (54), a torsion spring (55), a torsion air bag (56), and a dustproof sleeve (57). The air supply pipe (54) is fixedly connected to the right side of the gas valve (53). The torsion spring (55) is fixedly connected to the middle of the outer frame (51). The torsion air bag is fixedly connected to the inside of the torsion spring (55). The dustproof sleeve (57) is fixedly connected to the middle of the outer frame (51).

7. A powder pressing and molding equipment for powder metallurgy according to claim 6, characterized in that: The air supply pipe (54) extends through the middle of the outer frame (51), the air supply pipe (54) extends through the inside of the torsion spring (55), the air supply pipe (54) is fixedly connected to the bottom of the torsion airbag (56), the torsion spring (55) is fixedly connected to the bottom of the support platform (45), the feed hopper (21) is fixedly connected to the top of the outer frame (51), the press (1) is fixedly connected to the top of the outer frame (51), the support platform (45) is fixedly connected to the middle of the outer frame (51), and the surface of the torsion airbag (56) is provided with mesh holes.

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