Metal powder injection molding continuous degreasing sintering furnace and using method

Abstract

The invention belongs to the technical field of metal powder injection forming machining, and particularly relates to a metal powder injection forming continuous degreasing sintering furnace and a using method.The metal powder injection forming continuous degreasing sintering furnace comprises a furnace body, sliding rails are arranged on the two sides of the inner cavity wall of the furnace body, sliding plates are slidably connected to the inner sides of the sliding rails, and fixing rings are fixedly connected to the front ends of the sliding plates; a first rotating disc is rotationally arranged on the inner side of the fixing ring, a discharging opening is formed in the middle of the first rotating disc, and a plurality of downward-sliding type positioning mechanisms used for positioning gear workpieces are arranged on the upper end face of the first rotating disc. By means of the downward-sliding type positioning mechanism, when a worker places the gear workpieces every time, the gear workpieces can be separately placed only by sleeving the positioning rods with the multiple gear workpieces in sequence, each gear workpiece has an independent placement position, and the situation that when the gear workpieces are placed, the gear workpieces cannot be placed on the positioning rods is avoided. And gear workpieces are in contact with each other due to misoperation.

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: The rack frame with the 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. In addition, the rack frame can be fixed to ensure that the rack frame does not shake when it is moved, so as to avoid affecting the processing quality of the workpieces due to changes in the positions of the workpieces. However, when multiple workpieces need to be sintered at the same time, in order to avoid affecting the sintering effect due to mutual contact and covering of the workpieces, the multiple workpieces need to be placed separately. When the staff manually place the multiple workpieces separately on the rack frame, it is easy for the workpieces to contact each other due to operational errors. Therefore, 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 labor-intensive, and increases the work efficiency. The labor intensity of the workers is increased, and when placing the workpieces, the workers' hands are required to move to various positions of the object frame to separate and place the workpieces. In this process, the workers' bodies will frequently move in different amplitudes, which also increases the labor intensity of the workers. In addition, usually, after the workpieces are sintered, the workers are required 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 in various positions on the rack frame, the workers will need to frequently move their sights to check the quality of the workpieces, which can easily cause visual fatigue of the workers and even confusion.

[0005] To this end, the present invention provides a metal powder injection molding continuous degreasing sintering furnace and a use method thereof. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a continuous degreasing and sintering furnace for metal powder injection molding and a method for using the furnace.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a metal powder injection molding continuous degreasing and sintering furnace, comprising a furnace body, wherein 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 turntable 1 is rotatably arranged inside the fixing ring, a discharge port is arranged in the middle of the turntable 1, and a plurality of downward sliding positioning mechanisms for positioning a gear workpiece are arranged on the upper end surface of the turntable 1; The downward positioning mechanism comprises a plurality of placement plates rotatably arranged on an upper end surface of a rotating disk, a positioning column is fixedly connected to the middle of the upper end surface of the placement plate, and a plurality of positioning rods are slidably connected to the positioning column; The furnace body is also provided with a push-down mechanism which can discharge the sintered gear workpieces uniformly from the discharge port; The pushing mechanism includes a pushing block slidably connected to one side of the placement plate, one end of the pushing block is fixedly connected to a spring, the other end of the spring is fixedly connected to the bottom of the placement plate, the upper end of the furnace body is slidably connected to two sliding rods, the lower end of the sliding rod is fixedly connected to a lifting plate, the lower end of the lifting plate is fixedly connected to a fixed plate, and a plurality of pushing rods are plugged and slidably connected to the fixed plate.

[0008] Preferably, a rotating shaft is rotatably provided on the upper end surface of the inner cavity of the positioning column, and a rotating block is fixedly connected to the lower end of the rotating shaft. The rotating block is rotatably provided in the inner cavity of the positioning column, and a torsion spring is sleeved on the rotating shaft. The torsion spring is used to reset the rotating shaft, and a plurality of connecting rods are rotatably provided on the upper end surface of the rotating block, and one end of the connecting rod is rotatably connected to one end of the positioning rod.

[0009] Preferably, two sliding rods 2 are slidably connected to one side of the furnace body, one end of the sliding rod 2 is fixedly connected to a connecting block, a gear 2 is rotatably provided on one side of the lower end surface of the connecting block, a motor 4 is fixedly connected to one side of the upper end surface of the connecting block, the output end of the motor 4 is fixedly connected to the gear 2, a plurality of tooth blocks are provided on the outer ring of the turntable 1, the gear 2 and the tooth blocks on the outer ring of the turntable 1 are meshed with each other, an electric push rod 2 is fixedly connected to one side of the furnace body, and the piston end of the electric push rod 2 is fixedly connected to one side of the connecting block.

[0010] Preferably, an electric push rod 1 is fixedly connected to the front side of the upper end of the furnace body, and the piston end of the electric push rod 1 is fixedly connected to one side of the upper end surface of the lifting plate.

[0011] Preferably, a turntable 2 is rotatably arranged in the middle of the upper end surface of the fixed disk, a plurality of connecting rods 2 are rotatably arranged on the upper end surface of the turntable 2, one end of the connecting rod 2 is rotatably connected to one side of the upper end surface of the push rod, a motor 1 is fixedly connected to the middle of the lower end surface of the turntable 2, and the output end of the motor 1 is fixedly connected to the turntable 2.

[0012] Preferably, a connecting plate is fixedly connected to one side of the upper end surface of the fixed plate, a T-shaped plate is rotatably provided on one side of the front end of the connecting plate, connecting rod three is rotatably provided on both sides of the lower end surface of the T-shaped plate, connecting rod three is rotatably provided at one end of connecting rod three, and connecting rod four is rotatably provided at one end of connecting rod four.

[0013] Preferably, motor 2 is fixedly connected to the front side of the upper end surface of the connecting plate, the output end of motor 2 is fixedly connected to one side of the upper end surface of the T-shaped plate, motor 3 is fixedly connected to one side of the upper end surface of the T-shaped plate, and the output end of motor 3 is fixedly connected to one end of connecting rod 3.

[0014] Preferably, a gear 1 is fixedly connected to one side of the lower end of the placement plate, a plurality of racks are slidably connected to the turntable 1, the tooth blocks on the surface of the racks are meshed with the gear 1, a connecting ring is fixedly connected to the lower end of the rack, spring 2 is fixedly connected to both sides of the connecting ring, the upper end of the spring 2 is fixedly connected to a lower end surface of the turntable, and a top column is fixedly connected to one side of the lower end surface of the connecting ring.

[0015] Preferably, two slide bars three are slidably connected to the lower side of the front end of the furnace body, the upper ends of the slide bars three are fixedly connected to a top block, the lower side of the front end of the furnace body is fixedly connected to a cylinder, and the piston end of the cylinder is fixedly connected to the top block.

[0016] A method for using a continuous degreasing and sintering furnace for metal powder injection molding comprises the following specific steps: S1. Open the furnace door of the furnace body, drive the sliding plate to slide on the slide rail, and move the turntable 1 out of the furnace body. Then the worker stands on one side of the turntable 1 and sets the gear workpiece on the positioning rod. The gear workpiece will slide down with the positioning rod under the action of its own gravity until the gear workpiece is placed on the placement plate. Since the gear workpiece will squeeze the positioning rod when it slides down, the positioning rod can be pressed against the inner wall of the gear workpiece under the action of the torsion spring. Then the turntable 1 is driven to rotate, so that the placement plate with the gear workpiece placed thereon is moved to other positions, and the placement plate without the gear workpiece placed thereon is moved in front of the worker. The gear workpiece can be placed by repeating the above operations; S2. After all the gear workpieces are placed, the turntable is driven into the furnace body, and the gear workpieces can complete the two steps of degreasing and sintering in the furnace body; S3. When the gear workpiece is sintered, the turntable 1 is driven to be moved out of the furnace body. At this time, the worker can stand on one side of the turntable 1 and drive the turntable 1 to rotate, so that each sintered gear workpiece is moved in front of him, and the sintering quality of each gear workpiece is checked in turn. S4. Before inspecting the sintering quality of the gear workpiece, the adjusting rod can be driven close to the gear workpiece until it fits against the outer side of the gear workpiece, and the gear workpiece can be rotated by pushing the tooth block on the surface of the gear workpiece through the adjusting rod, 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; S5. When the inspection is completed, the worker first removes the unqualified gear workpiece separately, then drives the turntable 1 to rotate to a fixed angle, and then drives the placement plate to rotate ninety degrees. At this time, the lifting plate is driven down again to align the ends of multiple push rods with the push blocks, and then the push rods push the push blocks, which in turn push the gear workpieces to move, so that they slide to the discharge port in the middle of the turntable 1 and are discharged uniformly. A collection container can be placed at the discharge port to collect the gear workpieces.

[0017] The beneficial effects of the present invention are as follows: 1. The metal powder injection molding continuous degreasing and sintering furnace and the method of using the present invention utilize a sliding positioning mechanism so that each time a worker places a gear workpiece, he only needs to put a plurality of gear workpieces on the positioning rod in sequence to achieve the separated placement of the gear workpieces, so that each gear workpiece has an independent placement position, thus avoiding the situation where the gear workpieces contact each other due to operational errors when placing the gear workpieces, eliminating the process of adjusting the positions of the workpieces again, and only needs the worker to stand on one side of the turntable 1, so that the turntable 1 can be driven to rotate to move the plurality of placement plates in front of the worker, and the worker's body only needs to move a fixed amplitude each time to achieve The placement of multiple gear workpieces reduces the labor intensity of workers, and because the gear workpieces are positioned, the gear workpieces will not shift or fall off during the process of turntable 1 entering the furnace body, and when the sintering of the gear workpieces is completed, turntable 1 is removed from the furnace body. At this time, the workers can stand on one side of turntable 1 and drive turntable 1 to rotate to move each sintered gear workpiece in front of them, so as to check the sintering quality of each gear workpiece in turn, and there is no need for workers to frequently move their sight lines to check the quality of the workpieces, which is not easy to cause visual fatigue of workers, and also improves the accuracy of inspection, is not easy to be confused, and avoids the unqualified sintered gear workpieces from flowing into the subsequent processing procedures.

[0018] 2. The metal powder injection molding continuous degreasing sintering furnace and the use method described in the present invention can rotate multiple gear workpieces by adjusting the rod to push the gear blocks on the surface of the gear workpiece before inspecting the sintering quality of the gear workpiece. When the multiple gear workpieces are moved in front of the worker in turn, they are all at the same angle, so that the inspector can observe each gear workpiece from a fixed perspective, and it is easy to form a fixed inspection rhythm. This consistency makes it easier for the inspector to compare the gear workpieces, which is convenient for identifying defects on the gear workpieces and less likely to miss inspections.

[0019] 3. The metal powder injection molding continuous degreasing and sintering furnace and the use method described in the present invention utilize a push-down mechanism. After the inspection is completed, the ends of multiple push rods are driven to align with the push blocks, and then the push rods are driven to push the push blocks. The push blocks will push the gear workpieces to move, causing them to slide to the discharge port in the middle of a turntable and be discharged uniformly. A collection container can be placed at the discharge port to collect the gear workpieces, thereby eliminating the process of workers removing the gear workpieces one by one, which is more labor-saving. Moreover, compared with the method of rotating the turntable to make the gear workpieces fall, this method can concentrate the gear workpieces and make them more easily fall into a collection container with a smaller opening area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure of a turntable; Figure 3 yes Figure 2 A partial enlarged view of the middle part; Figure 4 It is a schematic diagram of the three-dimensional structure at the fixed disk; Figure 5 It is a schematic diagram of the three-dimensional structure where the plate is placed; Figure 6 It is a schematic diagram of the internal three-dimensional structure of the positioning column; Figure 7 It is a schematic diagram of the three-dimensional structure at the rotating block; Figure 8 It is a schematic diagram of the three-dimensional structure at the connecting plate; Fig. 9 It is a schematic diagram of the three-dimensional structure at the connecting ring.

[0022] In the figure: 1, furnace body; 2, electric push rod 1; 3, slide rod 1; 4, fixed ring; 5, turntable 1; 6, slide rail; 7, slide plate; 8, positioning column; 9, positioning rod; 10, push block; 11, gear 1; 12, spring 1; 13, rack; 14, rotating block; 15, rotating shaft; 16, torsion spring; 17, connecting rod 1; 18, lifting plate; 19, fixed plate; 20, push rod; 21, connecting rod 2; 22, turntable 2; 2 3. Motor 1; 24. Adjustment rod; 25. Connecting plate; 26. Motor 2; 27. T-plate; 28. Motor 3; 29. ​​Connecting rod 3; 30. Connecting rod 4; 31. Ejector block; 32. Motor 4; 33. Gear 2; 34. Connecting block; 35. Electric push rod 2; 36. Slide rod 2; 37. Spring 2; 38. Ejector column; 39. Cylinder; 40. Slide rod 3; 41. Exhaust port; 42. Placement plate; 43. Connecting ring. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Please refer to Figure 1-Figure 9The present invention provides a technical solution: a metal powder injection molding continuous degreasing and sintering furnace, comprising a furnace body 1, slide rails 6 are arranged on both sides of the inner cavity wall of the furnace body 1, a slide plate 7 is slidably connected to the inner side of the slide rail 6, a fixed ring 4 is fixedly connected to the front end of the slide plate 7, a turntable 5 is rotatably arranged inside the fixed ring 4, a discharge port 41 is arranged in the middle of the turntable 5, and a plurality of downward sliding positioning mechanisms for positioning a gear workpiece are arranged on the upper end surface of the turntable 5; The downward sliding positioning mechanism includes a plurality of placement plates 42 rotatably arranged on the upper end surface of the rotating disk 1 5, a positioning column 8 is fixedly connected to the middle of the upper end surface of the placement plate 42, and a plurality of positioning rods 9 are slidably connected to the positioning column 8; The furnace body 1 is also provided with a push-down mechanism that can discharge the sintered gear workpieces uniformly from the discharge port 41; The pushing mechanism includes a pushing block 10 slidably connected to one side of the placement plate 42, one end of the pushing block 10 is fixedly connected to a spring 12, the other end of the spring 12 is fixedly connected to the bottom of the placement plate 42, the upper end of the furnace body 1 is slidably connected to two sliding rods 3, the lower end of the sliding rod 3 is fixedly connected to a lifting plate 18, the lower end of the lifting plate 18 is fixedly connected to a fixed plate 19, and a plurality of pushing rods 20 are plugged and slidably connected to the fixed plate 19.

[0025] In this embodiment, Figure 1 , Figure 3 , Figure 5-Figure 7 As shown, a rotating shaft 15 is rotatably provided on the upper end surface of the inner cavity of the positioning column 8, and a rotating block 14 is fixedly connected to the lower end of the rotating shaft 15. 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 connecting rods 17 are rotatably provided on the upper end surface of the rotating block 14, and one end of the connecting rod 17 is rotatably connected to one end of the positioning rod 9.

[0026] Two sliding rods 2 36 are slidably connected to one side of the furnace body 1, one end of the sliding rod 2 36 is fixedly connected to a connecting block 34, a gear 2 33 is rotatably provided on one side of the lower end surface of the connecting block 34, a motor 4 32 is fixedly connected to one side of the upper end surface of the connecting block 34, the output end of the motor 4 32 is fixedly connected to the gear 2 33, a plurality of tooth blocks are provided on the outer ring of the turntable 1 5, the gear 2 33 and the tooth blocks on the outer ring of the turntable 1 5 are meshed with each other, an electric push rod 2 35 is fixedly connected to one side of the furnace body 1, and the piston end of the electric push rod 2 35 is fixedly connected to one side of the connecting block 34.

[0027] Specifically, when the existing sintering furnace is in use, a rack frame with workpieces is placed on the surface of a receiving plate, and then the rack frame and the receiving plate are driven into the sintering furnace for sintering, and the rack frame can be fixed to ensure that the rack frame does not shake when it moves, so as to avoid affecting the processing quality of the workpieces due to changes in the positions of the workpieces. However, when multiple workpieces need to be sintered at the same time, in order to avoid affecting the sintering effect due to mutual contact and covering of the workpieces, the multiple workpieces need to be placed separately. When the staff manually place the multiple workpieces separately on the rack frame, it is easy for the workpieces to contact each other due to operational errors, and then the workpiece positions need to be manually adjusted again to prevent the workpieces from contacting each other, which is time-consuming. It is laborious and increases the labor intensity of the staff. Moreover, when placing the workpieces, the staff's hands need to be moved to various positions of the object frame to separate and place the workpieces. In this process, the staff's body will frequently move in different amplitudes, which also increases the labor intensity of the workers. Moreover, usually, after the workpieces are sintered, the workers are still required to check the sintering quality of the workpieces to pick out the workpieces with unqualified sintering quality to avoid them from flowing into the subsequent processing procedures. When the workpieces are distributed in various positions on the object frame, the workers will need to frequently move their sights to check the quality of the workpieces, which can easily cause visual fatigue of the workers and even confusion.

[0028] Therefore, in order to solve the above problems, when the present embodiment is used, when the gear workpiece is used, the furnace door of the furnace body 1 is opened, the sliding plate 7 is driven to slide on the sliding rail 6, and the turntable 1 5 is moved out from the inside of the furnace body 1, and then the worker stands on one side of the turntable 1 5, and sets the gear workpiece on the positioning rod 9. The gear workpiece will slide downward with the positioning rod 9 under the action of its own gravity until the gear workpiece is placed on the placement plate 42. As the gear workpiece slides down, it will squeeze the positioning rod 9. When the positioning rod 9 slides, the connecting rod 1 17, the rotating block 14, and the rotating shaft 15 rotate, and the torsion spring 16 will also be deformed, that is, under the action of the torsion spring 16, the positioning rod 9 is pressed against the inner wall of the gear workpiece, and then the electric push rod 2 35 is used to drive the connecting block 34 to move, so that the gear 2 33 and the tooth block of the outer ring of the turntable 1 5 are meshed with each other. At this time, the motor 4 32 can be started to drive the gear 2 33 to rotate The gear workpieces can be placed in a separate position by repeatedly placing the gear workpieces on the positioning rod 9, so that each time the worker places the gear workpieces, he only needs to put multiple gear workpieces on the positioning rod 9 in sequence to achieve the separation and placement of the gear workpieces, so that each gear workpiece has an independent placement position, avoiding the situation where the gear workpieces contact each other due to operational errors when placing the gear workpieces, eliminating the process of adjusting the position of the workpieces again, and only needs the worker to stand on one side of the turntable 5, so that the multiple placement plates 42 can be moved in front of the worker by driving the turntable 5 to rotate, and the worker's body only needs to move a fixed amplitude each time to achieve the placement of multiple gear workpieces, thereby reducing the labor intensity of the worker; When all the gear workpieces are placed, the gear 2 33 is driven away from the turntable 1 5, and the two are no longer meshed, so that the turntable 1 5 can enter the furnace body 1. Moreover, since the gear workpiece is positioned, the gear workpiece will not be offset and fall off during the process of the turntable 1 5 entering the furnace body 1. 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 described in detail. When the sintering of the gear workpiece is completed, the turntable 5 is moved out of the furnace body 1. At this time, the worker can stand on one side of the turntable 5 and drive the turntable 5 to rotate to move each sintered gear workpiece in front of him, so as to check the sintering quality of each gear workpiece in turn. There is no need for the worker to frequently move his line of sight to check the quality of the workpiece, which is not easy to cause visual fatigue of the worker, and also improves the accuracy of the inspection, is not easy to be confused, and avoids the gear workpieces that are unqualified from being sintered to flow into the subsequent processing procedures.

[0029] In this embodiment, Figure 1 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 As shown, 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.

[0030] A turntable 22 is rotatably arranged in the middle of the upper end surface of the fixed disk 19, and a plurality of connecting rods 21 are rotatably arranged on the upper end surface of the turntable 22. One end of the connecting rod 21 is rotatably connected to one side of the upper end surface of the push rod 20. A motor 1 23 is fixedly connected to the middle of the lower end surface of the turntable 22, and the output end of the motor 1 23 is fixedly connected to the turntable 22.

[0031] 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 provided on one side of the front end of the connecting plate 25, connecting rod three 29 is rotatably provided on both sides of the lower end surface of the T-shaped plate 27, a connecting rod four 30 is rotatably provided on one end of the connecting rod three 29, and an adjusting rod 24 is rotatably provided on one end of the connecting rod four 30.

[0032] 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 3 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 3 28 is fixedly connected to one end of the connecting rod 3 29.

[0033] A gear 11 is fixedly connected to one side of the lower end of the placement plate 42, and a plurality of racks 13 are slidably connected to the turntable 15. The tooth blocks on the surface of the racks 13 are meshed with the gear 11. A connecting ring 43 is fixedly connected to the lower end of the racks 13. Springs 2 37 are fixedly connected to both sides of the connecting ring 43. The upper end of the spring 2 37 is fixedly connected to the lower end surface of the turntable 15. A top column 38 is fixedly connected to one side of the lower end surface of the connecting ring 43.

[0034] Two slide bars 40 are slidably connected to the lower front end of the furnace body 1, and the upper ends of the slide bars 40 are fixedly connected to the top block 31. A cylinder 39 is fixedly connected to the lower front end of the furnace body 1, and the piston end of the cylinder 39 is fixedly connected to the top block 31.

[0035] Specifically, in the above embodiment, when the gear workpieces are sintered and the sintering quality inspection is performed, since each gear workpiece is placed on the placement plate 42 at a random angle, the angles of the gear workpieces are not uniform during the sintering quality inspection, so the workers are required to constantly adjust the inspection method and viewing angle, which makes it difficult to form a fixed inspection rhythm, and it is not easy to find quality defects by comparing the gear workpieces, which is prone to missed inspections. Moreover, after the quality inspection is completed, if the staff manually removes the gear workpieces one by one, the labor intensity of the staff will be increased. Therefore, in order to solve the above problems, when the present embodiment is used, before checking the sintering quality of the gear workpiece, the electric push rod 1 2 is used to drive the lifting plate 18 to descend, so that the adjusting rod 24 is at the edge of the gear workpiece, and then the motor 3 28 is used to drive the connecting rod 3 29 and the connecting rod 4 30 to rotate, so that the adjusting rod 24 is close to the gear workpiece until it fits with the outer side of the gear workpiece, and even if the adjusting rod 24 contacts the tooth block of the gear workpiece first, the gear workpiece will rotate under the action of the adjusting rod 24 squeezing the tooth block until the adjusting rod 24 fits with the outer ring surface of the gear workpiece. At this time, the motor 26 is used to drive the T-plate 27 to rotate a certain angle, that is, The gear workpiece can be rotated by pushing the gear block on the surface of the gear workpiece by the adjusting rod 24. When the gear workpiece rotates a certain angle, the adjusting rod 24 moves away from the gear workpiece and moves upward, and then the turntable 15 continues to rotate. The above operation can be repeated, and the gear workpieces can be pushed one by one by the adjusting rod 24, 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 it is easy to form a fixed inspection rhythm. This consistency makes it easier for the inspector to compare the gear workpieces, which is convenient for identifying defects on the gear workpieces and is less likely to miss inspections. After the inspection is completed, the worker first removes the unqualified gear workpiece separately, then drives the turntable 1 5 to rotate to a fixed angle, and then uses the cylinder 39 to drive the top block 31 to move upward, and pushes the top column 38 upward, so that the connecting ring 43 and the rack 13 rise at the same time, so that the gear 11 and the placement plate 42 can be rotated at the same time, and the placement plate 42 rotates ninety degrees. At this time, the lifting plate 18 is driven down again, so that the ends of the multiple push rods 20 can be aligned with the push block 10, and then the motor 1 23 is used to drive the turntable 2 22 to rotate, so that the multiple connecting rods 21 can rotate at the same time. , so that the push rod 20 slides on the fixed plate 19. When the push rod 20 moves, it can push the push block 10, and the push block 10 will push the gear workpiece to move, so that it slides to the discharge port 41 in the middle of the turntable 5 and is discharged uniformly. A collection container can be placed at the discharge port 41 to collect the gear workpieces, thereby eliminating the process of workers removing the gear workpieces one by one, which is more labor-saving. Moreover, compared with the method of rotating the turntable 5 to make the gear workpiece fall, this method can concentrate the gear workpieces and make it easier to fall into a collection container with a smaller opening area.

[0036] A method for using a continuous degreasing and sintering furnace for metal powder injection molding comprises 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 turntable 5 out of the furnace body 1. Then the worker stands on one side of the turntable 5 and sets the gear workpiece on the positioning rod 9. The gear workpiece will slide down with the positioning rod 9 under the action of its own gravity until the gear workpiece is placed on the placement plate 42. Since the gear workpiece will squeeze the positioning rod 9 when it slides down, the positioning rod 9 can be pressed against the inner wall of the gear workpiece under the action of the torsion spring 16. Then the turntable 5 is driven to rotate, so that the placement plate 42 with the gear workpiece placed thereon is moved to other positions, and the placement plate 42 without the gear workpiece placed thereon is moved in front of the worker. The gear workpiece can be placed by repeating the above operations; S2. After all the gear workpieces have been placed, the turntable 1 5 is driven into the furnace body 1, and the gear workpieces can complete the two steps of degreasing and sintering in the furnace body 1; S3. When the gear workpiece is sintered, the turntable 5 is driven to be moved out of the furnace body 1. At this time, the worker can stand on one side of the turntable 5 and drive the turntable 5 to rotate so as to move each sintered gear workpiece to the front and check the sintering quality of each gear workpiece in turn. S4. Before inspecting the sintering quality of the gear workpiece, the adjusting rod 24 can be driven close to the gear workpiece until it fits with the outer side of the gear workpiece, and the gear workpiece can be rotated by pushing the tooth block on the surface of the gear workpiece by the adjusting rod 24, 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; S5. When the inspection is completed, the worker first removes the unqualified gear workpiece separately, then drives the turntable 5 to rotate to a fixed angle, and then drives the placement plate 42 to rotate ninety degrees. At this time, the lifting plate 18 is driven down again, so that the ends of the multiple push rods 20 can be aligned with the push block 10, and then the push rods 20 push the push block 10, and the push block 10 will push the gear workpiece to move, so that it slides to the discharge port 41 in the middle of the turntable 5 and is discharged uniformly, and a collection container can be placed at the discharge port 41 to collect the gear workpieces.

[0037] 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 turntable 5 out of the furnace body 1, then the worker stands on one side of the turntable 5, sets the gear workpiece on the positioning rod 9, and the gear workpiece will slide down with the positioning rod 9 under the action of its own gravity until the gear workpiece is placed on the placement plate 42. As the gear workpiece slides down, it will squeeze the positioning rod 9, and the positioning rod 9 can be pressed against the inner wall of the gear workpiece under the action of the torsion spring 16, and then the turntable 5 is driven to rotate to place the gear workpiece. The placement tray 42 with the gear workpiece is moved to another position, and the placement tray 42 without the gear workpiece is moved in front of the worker. The gear workpiece can be placed by repeating the above operation; when all the gear workpieces are placed, the turntable 15 is driven into the furnace body 1, and the gear workpiece can complete the two steps of degreasing and sintering in the furnace body 1; when the sintering of the gear workpiece is completed, the turntable 15 is driven out of the furnace body 1. At this time, the worker can stand on one side of the turntable 15 and drive the turntable 15 to rotate to make each sintering The finished gear workpiece is moved to the front to check the sintering quality of each gear workpiece in turn; before checking the sintering quality of the gear workpiece, the adjusting rod 24 can be driven close to the gear workpiece until it fits with the outer side of the gear workpiece, and the gear workpiece is rotated by pushing the gear block on the surface of the gear workpiece by the adjusting rod 24, 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; when the inspection is completed, the worker first removes the unqualified gear workpiece separately, and then drives the turntable 5 to rotate to a fixed angle, and then drives the placement plate 42 to rotate ninety degrees. At this time, the lifting plate 18 is driven down again, so that the ends of the multiple push rods 20 can be aligned with the push block 10, and then the push rod 20 pushes the push block 10, and the push block 10 will push the gear workpiece to move, so that it slides to the discharge port 41 in the middle of the turntable 5 and is discharged uniformly, and a collection container can be placed at the discharge port 41 to collect the gear workpieces.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A continuous degreasing and sintering furnace for metal powder injection molding, comprising a furnace body (1), characterized in that: Slide rails (6) are arranged on both sides of the inner cavity wall of the furnace body (1), a slide plate (7) is slidably connected to the inner side of the slide rail (6), a fixing ring (4) is fixedly connected to the front end of the sliding plate (7), a turntable (5) is rotatably arranged on the inner side of the fixing ring (4), a discharge port (41) is arranged in the middle of the turntable (5), and a plurality of downward sliding positioning mechanisms for positioning the gear workpiece are arranged on the upper end surface of the turntable (5); The downward sliding positioning mechanism comprises a plurality of placement plates (42) rotatably arranged on the upper end surface of the rotating disk (5), a positioning column (8) being fixedly connected to the middle of the upper end surface of the placement plate (42), and a plurality of positioning rods (9) being slidably connected to the positioning column (8); The furnace body (1) is also provided with a push-down mechanism capable of uniformly discharging the sintered gear workpieces from the discharge port (41); The push-down mechanism comprises 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 spring (12); the other end of the spring (12) is fixedly connected to the bottom of the placement plate (42); the upper end of the furnace body (1) is slidably connected to two slide bars (3); the lower end of the slide bar (3) is 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 plugged 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); a T-shaped plate (27) is rotatably provided on one side of the front end of the connecting plate (25); both sides of the lower end surface of the T-shaped plate (27) are rotatably provided with connecting rods (29); one end of the connecting rod (29) is rotatably provided with connecting rods (30); one end of the connecting rod (30) is rotatably provided with connecting rods (30) An adjustment rod (24) is provided. A second motor (26) is fixedly connected to the front side of the upper end face of the connecting plate (25). The output end of the second motor (26) is fixedly connected to one side of the upper end face of the T-shaped plate (27). A third motor (28) is fixedly connected to one side of the upper end face of the T-shaped plate (27). The output end of the third motor (28) is fixedly connected to one end of a third connecting rod (29). A gear (11) is fixedly connected to one side of the lower end of the placement plate (42). A plurality of racks (13) are slidably connected to the rotating disk (5). The tooth blocks on the surfaces of the racks (13) mesh with the gear (11). A connecting ring (43) is fixedly connected to the lower end of the racks (13). Both sides of the connecting ring (43) are fixedly connected to a second spring (37). The upper end of the second spring (37) is fixedly connected to the lower end face of the rotating disk (5). A top column (38) is fixedly connected to one side of the lower end face of the connecting ring (43).

2. A continuous degreasing and sintering furnace for metal powder injection molding according to claim 1, characterized in that: A rotating shaft (15) is rotatably arranged on the upper end surface of the inner cavity of the positioning column (8), and 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 connecting rods (17) are rotatably arranged on the upper end surface of the rotating block (14), and one end of the connecting rod (17) is rotatably connected to one end of the positioning rod (9).

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

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

5. A continuous degreasing and sintering furnace for metal powder injection molding according to claim 4, characterized in that: A second rotating disk (22) is rotatably disposed at the middle of the upper end surface of the fixed disk (19); a plurality of second connecting rods (21) are rotatably disposed at the upper end surface of the second rotating disk (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); a first motor (23) is fixedly connected to the middle of the lower end surface of the second rotating disk (22); an output end of the first motor (23) is fixedly connected to the second rotating disk (22).

6. A continuous degreasing and sintering furnace for metal powder injection molding according to claim 5, characterized in that: The lower front end of the furnace body (1) is slidably connected to two sliding rods (40), the upper end of the sliding rod (40) is fixedly connected to a top block (31), the lower front end of the furnace body (1) is fixedly connected to a cylinder (39), and the piston end of the cylinder (39) is fixedly connected to the top block (31).

7. A method for using a continuous degreasing and sintering furnace for metal powder injection molding, characterized in that: The continuous debinding sintering furnace according to claim 6 is used for sintering, comprising 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 turntable (5) out of the furnace body (1). Then, the worker stands on one side of the turntable (5) and sets the gear workpiece on the positioning rod (9). Under the action of its own weight, the gear workpiece slides downward along with the positioning rod (9) until the gear workpiece is placed on the placement plate (42). As the gear workpiece slides down, it squeezes the positioning rod (9). Under the action of the torsion spring (16), the positioning rod (9) and the inner wall of the gear workpiece are pressed tightly. Then, the turntable (5) is driven to rotate, so that the placement plate (42) on which the gear workpiece is placed is moved to another position, and the placement plate (42) without the gear workpiece placed is moved in front of the worker. The gear workpiece can be placed by repeating the above operation. S2. After all the gear workpieces have been placed, the turntable 1 (5) is driven into the furnace body (1), and the gear workpieces can complete the two steps of degreasing and sintering in the furnace body (1); S3. When the gear workpiece is sintered, the turntable 1 (5) is driven to be removed from the furnace body (1). At this time, the worker can stand on one side of the turntable 1 (5) and drive the turntable 1 (5) to rotate so that each sintered gear workpiece can be moved in front of him to check the sintering quality of each gear workpiece in turn. S4. Before inspecting the sintering quality of the gear workpiece, the adjusting rod (24) can be driven close to the gear workpiece until it is in contact with the outer side of the gear workpiece, and the gear workpiece can be rotated by pushing the tooth block on the surface of the gear workpiece with the adjusting rod (24), 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 makes it easy to form a fixed inspection rhythm; S5. After the inspection is completed, the worker first removes the unqualified gear workpieces separately, then drives the turntable (5) to rotate to a fixed angle, and then drives the placement plate (42) to rotate ninety degrees. At this time, the lifting plate (18) is driven down again, so that the ends of the plurality of push rods (20) are aligned with the push block (10), and then the push rods (20) push the push block (10), and the push block (10) pushes 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.

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