A continuous debinding and sintering furnace for metal powder injection molding and its usage method

Abstract

The present invention belongs to the technical field of metal powder injection molding processing, and specifically relates to a continuous debinding and sintering furnace for metal powder injection molding and a usage method thereof, including a furnace body. Slide rails are arranged on both sides of the inner cavity wall of the furnace body. A sliding plate is slidably connected to the inner side of the slide rails. A fixing ring is fixedly connected to the front end of the sliding plate. A first turntable is rotatably arranged inside the fixing ring. A discharge port is arranged in the middle of the first turntable. A plurality of downward-sliding positioning mechanisms for positioning gear workpieces are arranged on the upper end surface of the first turntable. The present invention realizes the use of the downward-sliding positioning mechanism, so that each time a worker places gear workpieces, only need to sequentially sleeved a plurality of gear workpieces on the positioning rods, then the separated placement of the gear workpieces can be realized, so that each gear workpiece has an independent placement position, avoiding the situation that the gear workpieces are in contact with each other due to operation errors when placing the gear workpieces.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder injection molding processing, in particular to a metal powder injection molding continuous degreasing sintering furnace and a use method thereof. Background Art

[0002] Metal powder injection molding is a new near-net forming technology. A mixture of metal powder and binder is injected into the mold cavity at a certain temperature, speed and pressure through an injection machine. After cooling and shaping, a preform of a certain shape and size is obtained. The binder in the preform is removed and sintered to obtain a part with certain mechanical properties. In its molding process, degreasing and sintering are the most critical steps. Degreasing is the process of removing the binder contained in the formed blank before sintering. Sintering can make the porous degreasing blank shrink and densify into a product with certain organization and performance. Moreover, degreasing and sintering can be completed at one time, which is the integrated degreasing and sintering technology.

[0003] The patent with announcement number CN210435367U discloses a metal injection molding vacuum sintering furnace, including a base, a vacuum sintering furnace body, a motor and a rack frame, the upper end of the base is fixed with the vacuum sintering furnace body, and the inner upper surface of the vacuum sintering furnace body is fixed with a fixing column, the surface of the fixing column is installed with a fixing rod, the output end of the motor is installed with a threaded rod, and the surface of the threaded rod is installed with a receiving plate, the upper surface of the receiving plate is provided with a groove, the surface of the moving rod is provided with a fastening nut, the upper surface of the receiving plate is provided with a limiting rod, and the left surface of the vacuum sintering furnace body is fixed with a liquid gas box. The metal injection molding vacuum sintering furnace is provided with a threaded rod, a motor and a sliding rod, which can smoothly transport the workpiece to the inside of the vacuum sintering furnace body, so that the workpiece will not shake during transportation, thereby not changing the position of the workpiece, and thus not affecting the quality of the workpiece.

[0004] However, the above technical solution still has the following deficiencies in practical application:

[0005] By placing the rack frame with workpieces on the surface of the receiving plate, and then driving the rack frame and the receiving plate into the sintering furnace for sintering. Moreover, the rack frame can be fixed to ensure that there is no shaking when the rack frame moves, avoiding the influence on the processing quality of the workpieces due to the change of the workpiece position. However, when multiple workpieces need to be sintered simultaneously, in order to avoid affecting the sintering effect due to the mutual contact and covering of the workpieces, it is necessary to place the multiple workpieces separately. When the staff manually places multiple workpieces separately on the rack frame, it is easy to cause the workpieces to contact each other due to operational errors, and then it is necessary to manually adjust the workpiece position again to prevent the workpieces from contacting each other, which is time-consuming and laborious, increasing the labor intensity of the staff. Moreover, when placing the workpieces, the staff's hands also need to move to various positions of the object frame to achieve the separate placement of the workpieces. During this process, the staff's body will move frequently in different amplitudes, which also increases the labor intensity of the workers. And usually, after the workpieces are sintered, the staff also needs to check the sintering quality of the workpieces to pick out the workpieces with unqualified sintering quality to prevent them from flowing into the subsequent processing procedures. When the workpieces are distributed at various positions on the rack frame, it will cause the staff to frequently move their line of sight to check the quality of the workpieces, which is likely to cause visual fatigue of the workers and even confusion.

[0006] Therefore, the present invention provides a continuous debinding and sintering furnace for metal powder injection molding and a using method thereof. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art, the present invention proposes a continuous debinding and sintering furnace for metal powder injection molding and a using method thereof.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a continuous debinding and sintering furnace for metal powder injection molding, including a furnace body. On both sides of the inner cavity wall of the furnace body, there are slide rails. Inside the slide rails, there is a sliding plate slidably connected. At the front end of the sliding plate, there is a fixed ring fixedly connected. Inside the fixed ring, there is a turntable I rotatably arranged. In the middle of the turntable I, there is a discharge port. On the upper end surface of the turntable I, there are multiple downward-sliding positioning mechanisms for positioning gear workpieces.

[0009] The downward-sliding positioning mechanism includes multiple placement plates rotatably arranged on the upper end surface of the turntable I. In the middle of the upper end surface of the placement plate, there is a positioning column fixedly connected. On the positioning column, there are multiple positioning rods slidably connected.

[0010] On the furnace body, there is also a pushing mechanism that can uniformly discharge the sintered gear workpieces from the discharge port.

[0011] The pushing mechanism includes a push block slidably connected to one side of the placing plate. One end of the push block is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to the bottom of the placing plate. Two first sliding rods are slidably connected to the front and rear of the upper end of the furnace body. The lower ends of the first sliding rods are fixedly connected to a lifting plate, and the lower end of the lifting plate is fixedly connected to a fixed plate. A plurality of push rods are inserted and slidably connected to the fixed plate.

[0012] Preferably, a rotating shaft is rotatably provided on the upper end surface of the inner cavity of the positioning column. The lower end of the rotating shaft is fixedly connected to a rotating block, and the rotating block is rotatably provided in the inner cavity of the positioning column. A torsion spring is sleeved on the rotating shaft, and the torsion spring is used to reset the rotating shaft. A plurality of first connecting rods are rotatably provided on the upper end surface of the rotating block, and one end of each first connecting rod is rotatably connected to one end of the positioning rod.

[0013] Preferably, two second sliding rods are slidably connected to one side of the furnace body. One end of each second sliding rod is fixedly connected to a connecting block. On one side of the lower end surface of the connecting block, a second gear is rotatably provided. On one side of the upper end surface of the connecting block, a fourth motor is fixedly connected. The output end of the fourth motor is fixedly connected to the second gear. A plurality of tooth blocks are provided on the outer ring of the first turntable, and the second gear meshes with the tooth blocks on the outer ring of the first turntable. An electric push rod two is fixedly connected to one side of the furnace body, and the piston end of the electric push rod two is fixedly connected to one side of the connecting block.

[0014] Preferably, an electric push rod one is fixedly connected to the front side of the upper end of the furnace body, and the piston end of the electric push rod one is fixedly connected to one side of the upper end surface of the lifting plate.

[0015] Preferably, a second turntable is rotatably provided in the middle of the upper end surface of the fixed plate. A plurality of second connecting rods are rotatably provided on the upper end surface of the second turntable. One end of each second connecting rod is rotatably connected to one side of the upper end surface of the push rod. In the middle of the lower end surface of the second turntable, a first motor is fixedly connected, and the output end of the first motor is fixedly connected to the second turntable.

[0016] Preferably, a connecting plate is fixedly connected to one side of the upper end surface of the fixed plate. On one side of the front end of the connecting plate, a T-shaped plate is rotatably provided. On both sides of the lower end surface of the T-shaped plate, third connecting rods are rotatably provided. One end of each third connecting rod is rotatably provided with a fourth connecting rod, and one end of each fourth connecting rod is rotatably provided with an adjusting rod.

[0017] Preferably, a second motor is fixedly connected to the front side of the upper end surface of the connecting plate, and the output end of the second motor is fixedly connected to one side of the upper end surface of the T-shaped plate. On one side of the upper end surface of the T-shaped plate, a third motor is fixedly connected, and the output end of the third motor is fixedly connected to one end of the third connecting rod.

[0018] Preferably, one side of the lower end of the placement plate is fixedly connected with a first gear. A plurality of racks are slidably connected to the first turntable. The teeth on the surface of the racks are meshed with the first gear. The lower end of the rack is fixedly connected with a connecting ring. Both sides of the connecting ring are fixedly connected with second springs. The upper ends of the second springs are fixedly connected to the lower end surface of the first turntable. One side of the lower end surface of the connecting ring is fixedly connected with a top column.

[0019] Preferably, two third sliding rods are slidably connected to the lower side of the front end of the furnace body. The upper ends of the third sliding rods are fixedly connected with top blocks. A cylinder is fixedly connected to the lower side of the front end of the furnace body. The piston end of the cylinder is fixedly connected to the top block.

[0020] A method for using a continuous debinding and sintering furnace for metal powder injection molding includes the following specific steps:

[0021] S1. Open the furnace door of the furnace body, drive the sliding plate to slide on the sliding rail, and move the first turntable out of the furnace body. Then, the worker stands on one side of the first turntable and sleeves the gear workpiece on the positioning rod. Under the action of its own gravity, the gear workpiece will slide down along the positioning rod until the gear workpiece is placed on the placement plate. Since the gear workpiece will squeeze the positioning rod when sliding down, under the action of the torsion spring, the positioning rod can be made to abut against the inner wall of the gear workpiece. Then, drive the first turntable to rotate, so that the placement plate with the gear workpiece is moved to other positions, and the placement plate without the gear workpiece is moved in front of the worker. By repeating the above operations, the gear workpiece can be placed.

[0022] S2. When all the gear workpieces are placed, drive the first turntable into the furnace body, and the gear workpiece can complete the two steps of debinding and sintering in the furnace body.

[0023] S3. When the gear workpiece is sintered, drive the first turntable out of the furnace body. At this time, the worker can also stand on one side of the first turntable and drive the first turntable to rotate, so that each sintered gear workpiece is moved in front of the worker to sequentially check the sintering quality of each gear workpiece.

[0024] S4. Before checking the sintering quality of the gear workpiece, the adjusting rod can be driven to approach the gear workpiece until it fits against the outer side of the gear workpiece. Moreover, by pushing the teeth on the surface of the gear workpiece with the adjusting rod, the gear workpiece can be rotated so that when multiple gear workpieces are moved in front of the worker, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective and easily form a fixed inspection rhythm.

[0025] S5. After the inspection is completed, the worker first separately removes the unqualified gear workpieces, then drives the first turntable to rotate to a fixed angle, and then drives the placement plate to rotate by ninety degrees. At this time, the lifting plate is driven to descend again, so that the ends of multiple push rods can be aligned with the push blocks. Then, the push rods are used to push the push blocks, and the push blocks will in turn push the gear workpieces to move, causing them to slide to the discharge port in the middle of the first turntable for unified discharge. A collection container can be placed at the discharge port to collect the gear workpieces.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. For the continuous degreasing and sintering furnace and its use method for metal powder injection molding according to the present invention, by using the downward-sliding positioning mechanism, each time a worker places gear workpieces, only by sequentially sleeving multiple gear workpieces on the positioning rods, the separated placement of the gear workpieces can be achieved, so that each gear workpiece has an independent placement position, avoiding the situation where gear workpieces come into contact with each other due to operational errors during the placement of gear workpieces, eliminating the process of readjusting the workpiece positions again. Moreover, the worker only needs to stand on one side of the first turntable and can, by driving the first turntable to rotate, move multiple placement plates in front of the worker. The worker only needs to move a fixed amplitude each time to place multiple gear workpieces, reducing the labor intensity of the worker. Also, since the gear workpieces are positioned, during the process of the first turntable entering the furnace body, the gear workpieces will not shift or fall off. And when the gear workpieces are sintered, after the first turntable is removed from the furnace body, at this time, the worker can also stand on one side of the first turntable and drive the first turntable to rotate to move each sintered gear workpiece in front of the worker to sequentially check the sintering quality of each gear workpiece, and there is no need for the worker to frequently move the line of sight to check the quality of the workpieces, which is not likely to cause visual fatigue of the worker and also improves the accuracy of the inspection, is not prone to confusion, and avoids unqualified sintered gear workpieces from flowing into subsequent processing procedures.

[0028] 2. For the continuous degreasing and sintering furnace and its use method for metal powder injection molding according to the present invention, before checking the sintering quality of the gear workpieces, the multiple gear workpieces can be rotated by pushing the tooth blocks on the surface of the gear workpieces through the adjustment rods. When the multiple gear workpieces are sequentially moved in front of the worker, they are all at the same angle, so that the inspectors can observe each gear workpiece from a fixed perspective, which is easy to form a fixed inspection rhythm. This consistency enables the inspectors to more easily compare the gear workpieces, facilitating the identification of defects on the gear workpieces and is not prone to missed inspections.

[0029] 3. A continuous debinding and sintering furnace for metal powder injection molding and its usage method according to the present invention utilize a pushing mechanism. After the inspection is completed, the ends of multiple push rods are driven to align with the push block, and then the push rods are driven to push the push block. The push block will then push the gear workpiece to move, causing it to slide and be uniformly discharged at the discharge port in the middle of the first turntable. A collection container can be placed at the discharge port to collect the gear workpiece, thus eliminating the process of workers removing the gear workpiece one by one, which is more labor-saving. Moreover, compared with the method of rotating the first turntable to make the gear workpiece fall, this method can concentrate the gear workpiece and make it easier to fall into a collection container with a smaller opening area. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0032] Figure 2 is a schematic three-dimensional structure diagram of the first turntable;

[0033] Figure 3 is Figure 2 a partial enlarged view of part A in

[0034] Figure 4 is a schematic three-dimensional structure diagram of the fixed disk;

[0035] Figure 5 is a schematic three-dimensional structure diagram of the placement disk;

[0036] Figure 6 is a schematic internal three-dimensional structure diagram of the positioning column;

[0037] Figure 7 is a schematic three-dimensional structure diagram of the rotating block;

[0038] Figure 8 is a schematic three-dimensional structure diagram of the connecting plate;

[0039] Figure 9 is a schematic three-dimensional structure diagram of the connecting ring.

[0040] In the figure: 1. Furnace body; 2. First electric push rod; 3. First sliding rod; 4. Fixed ring; 5. First turntable; 6. Slide rail; 7. Sliding plate; 8. Positioning column; 9. Positioning rod; 10. Pushing block; 11. First gear; 12. First spring; 13. Rack; 14. Rotating block; 15. Rotating shaft; 16. Torsion spring; 17. First connecting rod; 18. Lifting plate; 19. Fixed disk; 20. Push rod; 21. Second connecting rod; 22. Second turntable; 23. First motor; 24. Adjusting rod; 25. Connecting plate; 26. Second motor; 27. T-shaped plate; 28. Third motor; 29. Third connecting rod; 30. Fourth connecting rod; 31. Top block; 32. Fourth motor; 33. Second gear; 34. Connecting block; 35. Second electric push rod; 36. Second sliding rod; 37. Second spring; 38. Top column; 39. Cylinder; 40. Third sliding rod; 41. Discharge port; 42. Placing plate; 43. Connecting ring. Specific implementation manner

[0041] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0042] Please refer to Figures 1 - 9 , the present invention provides a technical solution: a continuous debinding and sintering furnace for metal powder injection molding, including a furnace body 1. On both sides of the inner cavity wall of the furnace body 1, there are slide rails 6. Inside the slide rails 6, there is a sliding plate 7 slidably connected. At the front end of the sliding plate 7, there is a fixed ring 4 fixedly connected. Inside the fixed ring 4, there is a first turntable 5 rotatably arranged. In the middle of the first turntable 5, there is a discharge port 41. On the upper end surface of the first turntable 5, there are a plurality of downward-sliding positioning mechanisms for positioning gear workpieces.

[0043] The downward-sliding positioning mechanism includes a plurality of placing plates 42 rotatably arranged on the upper end surface of the first turntable 5. In the middle of the upper end surface of the placing plate 42, there is a positioning column 8 fixedly connected. On the positioning column 8, there are a plurality of positioning rods 9 slidably connected.

[0044] On the furnace body 1, there is also a pushing mechanism that can uniformly discharge the sintered gear workpieces from the discharge port 41.

[0045] The pushing mechanism includes a pushing block 10 slidably connected to one side of the placing plate 42. One end of the pushing block 10 is fixedly connected to a first spring 12, and the other end of the first spring 12 is fixedly connected to the bottom of the placing plate 42. On the front and back of the upper end of the furnace body 1, there are two first sliding rods 3 slidably connected. At the lower end of the first sliding rods 3, there is a lifting plate 18 fixedly connected. At the lower end of the lifting plate 18, there is a fixed disk 19 fixedly connected. On the fixed disk 19, there are a plurality of push rods 20 inserted and slidably connected.

[0046] In this embodiment, as Figure 1, Figure 3 , Figures 5 - 7 As shown in Figures 5 - 7 , a rotating shaft 15 is rotatably arranged on the upper end surface of the inner cavity of the positioning column 8. A rotating block 14 is fixedly connected to the lower end of the rotating shaft 15. The rotating block 14 is rotatably arranged in the inner cavity of the positioning column 8. A torsion spring 16 is sleeved on the rotating shaft 15. The torsion spring 16 is used to reset the rotating shaft 15. A plurality of first connecting rods 17 are rotatably arranged on the upper end surface of the rotating block 14. One end of the first connecting rod 17 is rotatably connected to one end of the positioning rod 9.

[0047] Two second sliding rods 36 are slidably connected to one side of the furnace body 1. A connecting block 34 is fixedly connected to one end of the second sliding rod 36. A second gear 33 is rotatably arranged on one side of the lower end surface of the connecting block 34. A fourth motor 32 is fixedly connected to one side of the upper end surface of the connecting block 34. The output end of the fourth motor 32 is fixedly connected to the second gear 33. A plurality of tooth blocks are arranged on the outer ring of the first turntable 5. The second gear 33 meshes with the tooth blocks on the outer ring of the first turntable 5. A second electric push rod 35 is fixedly connected to one side of the furnace body 1. The piston end of the second electric push rod 35 is fixedly connected to one side of the connecting block 34.

[0048] Specifically, when the existing sintering furnace is in use, the rack frame loaded with workpieces is placed on the surface of the receiving plate, and then the rack frame and the receiving plate are driven into the sintering furnace for sintering. Moreover, the rack frame can be fixed to ensure that the rack frame does not shake when moving, avoiding the influence on the processing quality of the workpieces due to the change of the workpiece position. However, when multiple workpieces need to be sintered simultaneously, in order to avoid affecting the sintering effect due to the mutual contact and covering of the workpieces, it is necessary to place the multiple workpieces separately. When the staff manually places the multiple workpieces separately on the rack frame, it is easy to cause the workpieces to contact each other due to operation errors, and then it is necessary to manually adjust the positions of the workpieces again to prevent the workpieces from contacting each other, which is time-consuming and laborious, increasing the labor intensity of the staff. Moreover, when placing the workpieces, the hands of the staff also need to move to various positions of the object frame to achieve the separate placement of the workpieces. During this process, the staff's body will move frequently in different amplitudes, which also increases the labor intensity of the workers. Moreover, usually, after the workpieces are sintered, the staff also needs to check the sintering quality of the workpieces to pick out the workpieces with unqualified sintering quality to prevent them from flowing into the subsequent processing procedures. When the workpieces are distributed at various positions on the rack frame, it will cause the staff to frequently move their line of sight to check the quality of the workpieces, which is likely to cause visual fatigue of the workers and even confusion.

[0049] Therefore, to solve the above problems, when this embodiment is in use and is applied to gear workpieces, the furnace door of the furnace body 1 is opened, the sliding plate 7 is driven to slide on the slide rail 6, and the first turntable 5 is moved out of the furnace body 1. Then, the worker stands on one side of the first turntable 5 and sleeves the gear workpiece on the positioning rod 9. Under the action of its own gravity, the gear workpiece will slide downward along the positioning rod 9 until it is placed on the placement plate 42. Since the gear workpiece will squeeze the positioning rod 9 when sliding downward, when the positioning rod 9 slides, the first connecting rod 17, the rotating block 14, and the rotating shaft 15 will rotate, and the torsion spring 16 will also deform. Thus, under the action of the torsion spring 16, the positioning rod 9 will be pressed against the inner wall of the gear workpiece. Then, the second electric push rod 35 is used to drive the connecting block 34 to move, so that the second gear 33 meshes with the tooth blocks on the outer ring of the first turntable 5. At this time, the first turntable 5 can be rotated by starting the fourth motor 32 to drive the second gear 33 to rotate, so that the placement plate 42 with the gear workpiece is moved to other positions, and the placement plate 42 without the gear workpiece is moved in front of the worker. At this time, the above operation can be repeated to place the gear workpiece. As a result, every time the worker places the gear workpiece, only by sleeving a plurality of gear workpieces on the positioning rod 9 in sequence, the separated placement of the gear workpiece can be realized, so that each gear workpiece has an independent placement position, avoiding the situation where the gear workpieces come into contact with each other due to operation errors during the placement of the gear workpiece, saving the process of readjusting the workpiece position. Moreover, the worker only needs to stand on one side of the first turntable 5, and by driving the first turntable 5 to rotate, a plurality of placement plates 42 can be moved in front of the worker. The worker's body only needs to move a fixed amplitude each time to complete the placement of a plurality of gear workpieces, reducing the labor intensity of the worker;

[0050] After all the gear workpieces are placed, the second gear 33 is driven away from the first turntable 5 so that they are no longer meshed, and then the first turntable 5 can enter the furnace body 1. Moreover, since the gear workpiece is positioned, during the process of the first turntable 5 entering the furnace body 1, the gear workpiece will not shift or fall off. The gear workpiece can complete the two steps of degreasing and sintering in the furnace body 1. The degreasing and sintering integrated technology is an existing technology and will not be elaborated here;

[0051] After the sintering of the gear workpiece is completed, the first turntable 5 is moved out of the furnace body 1. At this time, the worker can also stand on one side of the first turntable 5 and drive the first turntable 5 to rotate, so that each sintered gear workpiece is moved in front of the worker to sequentially check the sintering quality of each gear workpiece. And there is no need for the worker to frequently move the line of sight to check the quality of the workpiece, which is not likely to cause visual fatigue of the worker and also improves the accuracy of the inspection, is not easy to be confused, and avoids the unqualified sintered gear workpieces from flowing into the subsequent processing procedures.

[0052] In this embodiment, as Figure 1 、 Figure 4 、Figure 5 , Figure 8 , Figure 9 As shown in Figure 9 , an electric push rod 2 is fixedly connected to the front side of the upper end of the furnace body 1, and the piston end of the electric push rod 2 is fixedly connected to one side of the upper end surface of the lifting plate 18.

[0053] A turntable 22 is rotatably arranged in the middle of the upper end surface of the fixed disk 19. A plurality of link rods 21 are rotatably arranged on the upper end surface of the turntable 22. One end of the link rod 21 is rotatably connected to one side of the upper end surface of the push rod 20. A motor 23 is fixedly connected to the middle of the lower end surface of the turntable 22, and the output end of the motor 23 is fixedly connected to the turntable 22.

[0054] A connecting plate 25 is fixedly connected to one side of the upper end surface of the fixed disk 19. A T-shaped plate 27 is rotatably arranged on one side of the front end of the connecting plate 25. Two link rods 29 are rotatably arranged on both sides of the lower end surface of the T-shaped plate 27. One end of the link rod 29 is rotatably provided with a link rod 30, and one end of the link rod 30 is rotatably provided with an adjusting rod 24.

[0055] A motor 26 is fixedly connected to the front side of the upper end surface of the connecting plate 25, and the output end of the motor 26 is fixedly connected to one side of the upper end surface of the T-shaped plate 27. A motor 28 is fixedly connected to one side of the upper end surface of the T-shaped plate 27, and the output end of the motor 28 is fixedly connected to one end of the link rod 29.

[0056] A gear 11 is fixedly connected to one side of the lower end of the placing plate 42. A plurality of racks 13 are slidably connected to the turntable 5. The tooth blocks on the surface of the rack 13 are meshed with the gear 11. A connecting ring 43 is fixedly connected to the lower end of the rack 13. Two springs 37 are fixedly connected to both sides of the connecting ring 43, and the upper ends of the springs 37 are fixedly connected to the lower end surface of the turntable 5. A top column 38 is fixedly connected to one side of the lower end surface of the connecting ring 43.

[0057] Two slide rods 40 are slidably connected to the lower front side of the furnace body 1. A top block 31 is fixedly connected to the upper ends of the slide rods 40. A cylinder 39 is fixedly connected to the lower front side of the furnace body 1, and the piston end of the cylinder 39 is fixedly connected to the top block 31.

[0058] Specifically, in the above embodiment, when the gear workpiece is sintered and the sintering quality is inspected, since the angle of each gear workpiece is random when it is placed on the placing plate 42, when the sintering quality is inspected, due to the inconsistent angles of the gear workpieces, workers also need to continuously adjust the inspection method and perspective, which is difficult to form a fixed inspection rhythm, and it is not easy to detect quality defects through the comparison between gear workpieces, and it is easy to miss inspections. Moreover, after the quality inspection work is completed, if the staff manually removes the gear workpieces one by one, it will increase the labor intensity of the staff;

[0059] Therefore, to solve the above problems, when this embodiment is in use, before inspecting the sintering quality of the gear workpiece, the electric push rod 2 drives the lifting plate 18 to descend, so that the adjusting rod 24 is located at the edge of the gear workpiece. Then, the motor 28 drives the connecting rod 29 and the connecting rod 30 to rotate, so that the adjusting rod 24 approaches the gear workpiece until it fits against the outer side of the gear workpiece. Moreover, even if the adjusting rod 24 contacts the tooth block of the gear workpiece first, under the action of the adjusting rod 24 pressing the tooth block, the gear workpiece will rotate until the adjusting rod 24 fits against the outer ring surface of the gear workpiece. At this time, the motor 26 drives the T-shaped plate 27 to rotate a certain angle, and then the gear workpiece can be rotated by pushing the tooth block on the surface of the gear workpiece through the adjusting rod 24. After the gear workpiece rotates a certain angle, the adjusting rod 24 moves away from the gear workpiece and moves upward. Then, the turntable 5 continues to rotate. By repeating the above operations, when multiple gear workpieces are moved to the front of the worker by pushing the gear workpieces one by one through the adjusting rod 24, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective, which is easy to form a fixed inspection rhythm. This consistency enables the inspector to more easily compare the gear workpieces, facilitating the identification of defects on the gear workpieces and making it less likely to miss inspections;

[0060] After the inspection is completed, the worker first separately removes the unqualified gear workpieces, then drives the turntable 5 to rotate to a fixed angle, and then uses the air cylinder 39 to drive the top block 31 to move upward and push the top column 38 upward, so that the connecting ring 43 and the rack 13 rise simultaneously, and then the gear 11 and the placing plate 42 can rotate simultaneously, and the placing plate 42 rotates 90 degrees. At this time, the lifting plate 18 is driven to descend again, so that the ends of the multiple push rods 20 are aligned with the push blocks 10. Then, the motor 23 drives the turntable 22 to rotate, so that the multiple connecting rods 21 rotate simultaneously, and the push rods 20 slide on the fixed plate 19. When the push rods 20 move, they can push the push blocks 10, and the push blocks 10 will push the gear workpieces to move, so that they slide to the discharge port 41 in the middle of the turntable 5 and are discharged uniformly. A collection container can be placed at the discharge port 41 to collect the gear workpieces, thus saving the process of the worker removing the gear workpieces one by one, which is relatively labor-saving. Moreover, compared with the method of rotating the turntable 5 to make the gear workpieces fall, this method can concentrate the gear workpieces and make it easier for them to fall into a collection container with a smaller opening area.

[0061] A method for using a continuous debinding and sintering furnace for metal powder injection molding, including the following specific steps:

[0062] S1. Open the furnace door of the furnace body 1, drive the sliding plate 7 to slide on the slide rail 6, and move the first turntable 5 out of the furnace body 1. Then, the worker stands on one side of the first turntable 5 and sleeves the gear workpiece on the positioning rod 9. Under the action of its own gravity, the gear workpiece will slide down along the positioning rod 9 until it is placed on the placement plate 42. Since the gear workpiece will squeeze the positioning rod 9 when sliding down, under the action of the torsion spring 16, the positioning rod 9 can be made to tightly abut against the inner wall of the gear workpiece. Then, drive the first turntable 5 to rotate, so that the placement plate 42 with the gear workpiece is moved to other positions, and the placement plate 42 without the gear workpiece is moved in front of the worker. By repeating the above operations, the gear workpiece can be placed;

[0063] S2. When all the gear workpieces are placed, drive the first turntable 5 into the furnace body 1, and the gear workpiece can complete the two steps of degreasing and sintering in the furnace body 1;

[0064] S3. When the sintering of the gear workpiece is completed, drive the first turntable 5 out of the furnace body 1. At this time, the worker can also drive the first turntable 5 to rotate by standing on one side of the first turntable 5, so that each sintered gear workpiece is moved in front of him to sequentially check the sintering quality of each gear workpiece;

[0065] S4. Before checking the sintering quality of the gear workpiece, the adjusting rod 24 can be driven to approach the gear workpiece until it fits against the outside of the gear workpiece. And by pushing the tooth blocks on the surface of the gear workpiece with the adjusting rod 24, the gear workpiece can be rotated so that when multiple gear workpieces are moved in front of the worker, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective, which is easy to form a fixed inspection rhythm;

[0066] S5. After the inspection is completed, the worker first separately removes the unqualified gear workpieces, then drives the first turntable 5 to rotate to a fixed angle, and then drives the placement plate 42 to rotate 90 degrees. At this time, drive the lifting plate 18 to descend again, so that the ends of the multiple push rods 20 can be aligned with the push blocks 10. Then, make the push rods 20 push the push blocks 10, and the push blocks 10 will push the gear workpiece to move, so that it slides to the discharge port 41 in the middle of the first turntable 5 for unified discharge, and a collection container can be placed at the discharge port 41 to collect the gear workpieces;

[0067] Working principle: Open the furnace door of the furnace body 1, drive the sliding plate 7 to slide on the slide rail 6, and move the first turntable 5 out of the furnace body 1. Then, the worker stands on one side of the first turntable 5 and sleevs the gear workpiece on the positioning rod 9. Under the action of its own gravity, the gear workpiece will slide down along the positioning rod 9 until it is placed on the placing plate 42. Since the gear workpiece will squeeze the positioning rod 9 when sliding down, under the action of the torsion spring 16, the positioning rod 9 can be made to press against the inner wall of the gear workpiece. Then, drive the first turntable 5 to rotate, so that the placing plate 42 with the gear workpiece moves to other positions, and the placing plate 42 without the gear workpiece moves in front of the worker. By repeating the above operations, the gear workpiece can be placed; when all the gear workpieces are placed, drive the first turntable 5 into the furnace body 1, and the gear workpiece can complete two steps of degreasing and sintering in the furnace body 1; when the sintering of the gear workpiece is completed, drive the first turntable 5 out of the furnace body 1. At this time, the worker can also stand on one side of the first turntable 5 and drive the first turntable 5 to rotate to move each sintered gear workpiece in front of him to check the sintering quality of each gear workpiece in turn; before checking the sintering quality of the gear workpiece, drive the adjusting rod 24 close to the gear workpiece until it fits against the outer side of the gear workpiece. And by means of pushing the tooth blocks on the surface of the gear workpiece with the adjusting rod 24, the gear workpiece is rotated so that when multiple gear workpieces move in front of the worker, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective, which is easy to form a fixed inspection rhythm; when the inspection is over, the worker first separately removes the unqualified gear workpieces, then drives the first turntable 5 to rotate to a fixed angle, and then drives the placing plate 42 to rotate 90 degrees. At this time, drive the lifting plate 18 to descend again, so that the ends of multiple push rods 20 can be aligned with the push blocks 10. Then, make the push rods 20 push the push blocks 10, and the push blocks 10 will push the gear workpiece to move, so that it slides to the discharge port 41 in the middle of the first turntable 5 for unified discharge, and a collection container can be placed at the discharge port 41 to collect the gear workpieces.

[0068] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous debinding and sintering furnace for metal powder injection molding, comprising a furnace body (1), characterized in that: On both sides of the inner cavity wall of the furnace body (1), there are slide rails (6). A slide plate (7) is slidably connected to the inner side of the slide rails (6). The front end of the slide plate (7) is fixedly connected to a fixed ring (4). A first turntable (5) is rotatably arranged inside the fixed ring (4). A discharge port (41) is arranged in the middle of the first turntable (5). On the upper end surface of the first turntable (5), there are multiple downward-sliding positioning mechanisms for positioning gear workpieces. The downward-sliding positioning mechanism includes multiple placement plates (42) rotatably arranged on the upper end surface of the first turntable (5). In the middle of the upper end surface of the placement plate (42), a positioning column (8) is fixedly connected. A plurality of positioning rods (9) are slidably connected to the positioning column (8). A pushing mechanism is also arranged on the furnace body (1) to uniformly discharge the sintered gear workpieces from the discharge port (41). The pushing-down mechanism includes a push block (10) slidably connected to one side of the placement plate (42). One end of the push block (10) is fixedly connected to a first spring (12), and the other end of the first spring (12) is fixedly connected to the bottom of the placement plate (42). Two first sliding rods (3) are slidably connected to the front and back of the upper end of the furnace body (1). The lower ends of the first sliding rods (3) are fixedly connected to a lifting plate (18). The lower end of the lifting plate (18) is fixedly connected to a fixed plate (19). A plurality of push rods (20) are inserted and slidably connected to the fixed plate (19). One side of the upper end surface of the fixed plate (19) is fixedly connected to a connecting plate (25). One side of the front end of the connecting plate (25) is rotatably provided with a T-shaped plate (27). Both sides of the lower end surface of the T-shaped plate (27) are rotatably provided with third connecting rods (29). One end of the third connecting rod (29) is rotatably provided with a fourth connecting rod (30). One end of the fourth connecting rod (30) is rotatably provided with an adjusting rod (24). One side of the front of the upper end surface of the connecting plate (25) is fixedly connected to a second motor (26). The output end of the second motor (26) is fixedly connected to one side of the upper end surface of the T-shaped plate (27). One side of the upper end surface of the T-shaped plate (27) is fixedly connected to a third motor (28). The output end of the third motor (28) is fixedly connected to one end of the third connecting rod (29). One side of the lower end of the placement plate (42) is fixedly connected to a first gear (11). A plurality of racks (13) are slidably connected to the turntable one (5). The tooth blocks on the surface of the rack (13) are meshed with the first gear (11). The lower end of the rack (13) is fixedly connected to a connecting ring (43). Both sides of the connecting ring (43) are fixedly connected to second springs (37). The upper ends of the second springs (37) are fixedly connected to the lower end surface of the turntable one (5). One side of the lower end surface of the connecting ring (43) is fixedly connected to a top column (38). The middle of the upper end surface of the fixed plate (19) is rotatably provided with a turntable two (22). A plurality of second connecting rods (21) are rotatably provided on the upper end surface of the turntable two (22). One end of the second connecting rod (21) is rotatably connected to one side of the upper end surface of the push rod (20). The middle of the lower end surface of the turntable two (22) is fixedly connected to a first motor (23). The output end of the first motor (23) is fixedly connected to the turntable two (22). Two third sliding rods (40) are slidably connected to the lower front side of the furnace body (1). The upper ends of the third sliding rods (40) are fixedly connected to a top block (31). A cylinder (39) is fixedly connected to the lower front side of the furnace body (1). The piston end of the cylinder (39) is fixedly connected to the top block (31).

2. The continuous debinding and sintering furnace for metal powder injection molding according to claim 1, wherein: A rotating shaft (15) is rotatably provided on the upper end surface of the inner cavity of the positioning column (8). The lower end of the rotating shaft (15) is fixedly connected to a rotating block (14). The rotating block (14) is rotatably provided in the inner cavity of the positioning column (8). A torsion spring (16) is sleeved on the rotating shaft (15). The torsion spring (16) is used to reset the rotating shaft (15). A plurality of first connecting rods (17) are rotatably provided on the upper end surface of the rotating block (14). One end of the first connecting rod (17) is rotatably connected to one end of the positioning rod (9).

3. A continuous debinding and sintering furnace for metal powder injection molding according to claim 2, characterized in that: On one side of the furnace body (1), two second sliding rods (36) are slidably connected. One end of each second sliding rod (36) is fixedly connected to a connecting block (34). On one side of the lower end face of the connecting block (34), a second gear (33) is rotatably arranged. On one side of the upper end face of the connecting block (34), a fourth motor (32) is fixedly connected. The output end of the fourth motor (32) is fixedly connected to the second gear (33). A plurality of tooth blocks are arranged on the outer ring of the first turntable (5). The second gear (33) meshes with the tooth blocks on the outer ring of the first turntable (5). On one side of the furnace body (1), a second electric push rod (35) is fixedly connected. The piston end of the second electric push rod (35) is fixedly connected to one side of the connecting block (34).

4. A continuous debinding and sintering furnace for metal powder injection molding according to claim 3, characterized in that: On the front side of the upper end of the furnace body (1), a first electric push rod (2) is fixedly connected. The piston end of the first electric push rod (2) is fixedly connected to one side of the upper end face of the lifting plate (18).

5. A method for using a continuous debinding and sintering furnace for metal powder injection molding, characterized in that, Sintering is carried out using the continuous degreasing and sintering furnace according to claim 4, including the following specific steps: S1. Open the furnace door of the furnace body (1), drive the sliding plate (7) to slide on the slide rail (6), and move the first turntable (5) out of the furnace body (1). Then, the worker stands on one side of the first turntable (5) and sleeves the gear workpiece on the positioning rod (9). Under the action of its own gravity, the gear workpiece will slide down along the positioning rod (9) until the gear workpiece is placed on the placement plate (42). Since the gear workpiece will squeeze the positioning rod (9) when sliding down, under the action of the torsion spring (16), the positioning rod (9) can be tightly pressed against the inner wall of the gear workpiece. Then, drive the first turntable (5) to rotate, so that the placement plate (42) with the gear workpiece is moved to other positions, and the placement plate (42) without the gear workpiece is moved in front of the worker. By repeating the above operations, the gear workpiece can be placed; S2. After all the gear workpieces are placed, drive the first turntable (5) into the furnace body (1). The gear workpiece can complete the two steps of degreasing and sintering in the furnace body (1); S3. After the gear workpiece is sintered, drive the first turntable (5) out of the furnace body (1). At this time, the worker can also stand on one side of the first turntable (5) and drive the first turntable (5) to rotate, so that each sintered gear workpiece is moved in front of the worker to sequentially check the sintering quality of each gear workpiece; S4. Before checking the sintering quality of the gear workpiece, the adjusting rod (24) can be driven to approach the gear workpiece until it fits against the outer side of the gear workpiece. And by pushing the tooth blocks on the surface of the gear workpiece with the adjusting rod (24), the gear workpiece is rotated, so that when a plurality of gear workpieces are moved in front of the worker, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective and easily form a fixed inspection rhythm; S5. After the inspection is completed, the worker first separately removes the unqualified gear workpieces, then drives the first turntable (5) to rotate to a fixed angle, and then drives the placement plate (42) to rotate by ninety degrees. At this time, the lifting plate (18) is driven to descend again, so that the ends of multiple push rods (20) can be aligned with the push blocks (10). Then, the push rods (20) are used to push the push blocks (10), and the push blocks (10) will in turn push the gear workpieces to move, causing them to slide to the discharge port (41) in the middle of the first turntable (5) for unified discharge. A collection container can be placed at the discharge port (41) to collect the gear workpieces.

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