Surface treatment device and method for metal powder injection molding pre-sintered blank

Abstract

The invention belongs to the technical field of metal powder injection molding, and particularly relates to a metal powder injection molding pre-sintered blank surface treatment device and method.The metal powder injection molding pre-sintered blank surface treatment device comprises a sintering device body, a box door is arranged on the front side of the sintering device body, and sliding rails are fixedly connected to the two sides of an inner cavity of the sintering device body; the sintering device body is provided with a sliding rail, the sliding rail is connected with a containing plate in an inserted and sliding mode, a containing disc is rotationally arranged in the middle of the frame, the upper end face of the containing disc is fixedly connected with a plurality of bearing discs, and the sintering device body is provided with a separation containing mechanism used for containing workpieces to be sintered on the bearing discs. According to the sintering device, the workpieces can fall on each bearing disc in sequence through the separated placing mechanism, the workpieces are placed in a separated mode, in the sintering process, the workpieces do not make contact with one another, it is ensured that the workpieces are evenly heated, the sintering effect is improved, the whole placing process does not need to be manually carried out by workers, and the working efficiency is improved. And the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder injection molding, in particular to a surface treatment device and method for a metal powder injection molding pre-sintered blank. Background Art

[0002] Metal powder injection molding technology is a new powder metallurgy forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. The entire process includes multiple steps, including a sintering step, in which the degreased blank is sintered to densify it and form the final metal part.

[0003] The patent with announcement number CN205816807U discloses a metal powder injection molding sintering device, which relates to the technical field of metal powder injection molding. The sintering tooling includes a sintering box, which is provided with at least two bottom plates, each of which is provided with at least two sintering disks, and the sintering disk includes a disk body, the shape of which is adapted to the shape of the workpiece to be sintered, and is used to support the workpiece; a limiting column is provided in the middle of the disk body, which is used to match with the through hole in the middle of the workpiece; a limiting groove is provided on one side of the disk body, which is used to match with the protrusion at the bottom of the workpiece; the sintering disk also includes a movable column, which is used to be inserted into the small hole on the workpiece. This patent greatly improves the matching of the sintering disk and the workpiece to be sintered, effectively improves the supporting effect of the sintering device, and prevents the product from being broken or deformed; at the same time, the setting of the sintering box and the bottom plate facilitates the placement of the workpiece, improves the efficiency of the sintering work, and is conducive to the mass production of the workpiece.

[0004] However, the above technical solution still has the following deficiencies in practical application: In order to avoid uneven heating caused by stacking or close arrangement of workpieces, and the problem of workpieces sliding back and forth during sintering and affecting the sintering quality, multiple workpieces are placed on the sintering tray in a fixed posture. The entire placement process needs to be performed manually by the staff, and after sintering is completed, the staff also needs to manually remove the multiple workpieces. The whole process is more manpower-consuming and increases the labor intensity of the staff.

[0005] To this end, the present invention provides a surface treatment device and method for a metal powder injection molding pre-sintered blank. 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 art, the present invention proposes a surface treatment device and method for a pre-sintered blank of metal powder injection molding.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a surface treatment device for pre-sintered blanks by metal powder injection molding, comprising a sintering machine body, a box door is arranged at the front side of the sintering machine body, both sides of the inner cavity of the sintering machine body are fixedly connected with slide rails, the slide rails are plugged and slidably connected with a placement plate, one side of the placement plate is fixedly connected with a frame, a placement plate is rotatably arranged in the middle of the frame, a plurality of support trays are fixedly connected to the upper end surface of the placement plate, and a separation placement mechanism for placing workpieces to be sintered on the support tray is arranged on the sintering machine body; The separation and placement mechanism includes a mounting plate slidably connected to one side of the upper end surface of the sintering device body, sliding rods are slidably connected to both sides of the mounting plate, the front end of the sliding rod is fixedly connected to a fixing plate, the front side of the fixing plate is fixedly connected to a supporting ring, the supporting ring is sleeved and fixedly connected to a feed hopper, the middle part of the lower end of the feed hopper is fixedly connected to a discharge pipe, the lower right end of the discharge pipe is rotatably provided with an upper baffle and a lower baffle, and the upper baffle is fixedly connected to the lower baffle.

[0008] Preferably, a positioning column is fixedly connected to the middle of the upper end surface of the support tray, and the upper end surface of the support tray is distributed in an array along the axis of the positioning column and is rotatably provided with a plurality of clamping blocks.

[0009] Preferably, the lower right end of the discharge pipe is fixedly connected to a second motor, and the output end of the second motor is fixedly connected to an upper baffle and a lower baffle.

[0010] Preferably, a threaded rod is threadedly connected to the lower side of the mounting plate, both ends of the threaded rod are rotatably arranged on the sintering device body, a motor 1 is fixedly connected to the right side of the upper end surface of the sintering device body, and the output end of the motor 1 is fixedly connected to the right end of the threaded rod.

[0011] Preferably, an electric push rod is fixedly connected to the middle part of the upper side of the rear end surface of the mounting plate, and the piston end of the electric push rod is fixedly connected to the middle part of the rear end surface of the fixing plate.

[0012] Preferably, a worm wheel is fixedly connected to the right end of the placement plate, and the worm wheel is rotatably arranged on the frame. A worm is rotatably arranged on the middle part of the right side of the frame, and the worm and the worm wheel are meshed with each other.

[0013] Preferably, two limiting rods are slidably connected to the upper left end of the front end surface of the sintering device body, and a reciprocating rod is slidably connected to the front end of the limiting rod, and the reciprocating rod can pass through the through hole at the bottom of the feed hopper.

[0014] Preferably, the reciprocating rod is rotatably provided with a guide column, the rear end of the guide column is fixedly connected to a turntable, the turntable is rotatably provided on the sintering device body, one side of the turntable is fixedly connected to a sprocket, the sprocket is rotatably provided on the sintering device body, and the sprocket is meshedly connected with a chain.

[0015] Preferably, a motor three is fixedly connected to the front end of the left side of the upper end surface of the sintering device body, and the output end of the motor three is fixedly connected to the sprocket on the right side.

[0016] A surface treatment method for a pre-sintered blank formed by metal powder injection molding comprises the following specific steps: S1. First, by pulling, slide the placement plate inside the slide rail, and move the entire placement plate out of the sintering machine body, align the feed tube with the support tray at the rear left side, and the protruding part of the lower baffle in the initial state extends into the inner cavity of the feed tube, while the notch of the upper baffle is aligned with the feed tube and does not contact the feed tube; S2, put multiple workpieces into the feed hopper, and the workpieces slide into the discharge tube under the action of gravity. When the workpieces slide in the discharge tube, they fit with the inner wall of the discharge tube. When the lower end surface of the workpiece contacts the lower baffle, the workpiece is blocked and cannot continue to fall, driving the upper baffle and the lower baffle to rotate. When the two rotate, the protruding part of the lower baffle gradually moves away from the discharge tube. When the lower baffle does not contact the workpiece, the workpiece will fall under the action of gravity. At the moment when the lowermost workpiece falls, the protruding part of the upper baffle will be inserted into the gap between the fitting surfaces of the two workpieces to prevent subsequent workpieces from falling, so that only a single workpiece can fall on the supporting tray. At this time, drive the discharge tube to move forward and align with another supporting tray. When the protruding part of the upper baffle is away from the workpiece, the protruding part of the lower baffle is just under the workpiece, which can support the bottom of the workpiece. Then repeat the above operation, so that each workpiece can fall on the supporting tray, and drive the discharge tube to move horizontally to make the workpiece fall on each supporting tray; S3. When the workpiece falls onto the support tray, the workpiece will be sleeved on the positioning column, and when the bottom of the workpiece contacts one end of the clamping block, the clamping block will rotate, and the other end of the clamping block will contact the workpiece, so that the clamping block can fix the workpiece under the action of the workpiece's own gravity; S4. After the frame enters the sintering machine body, close the box door and start sintering. After the workpiece is sintered, open the box door again and take the frame out of the sintering machine body. At the same time, place a container under the frame, manually rotate the worm to drive the worm wheel and the placement plate to rotate 180 degrees, so that the workpiece on the tray can fall into the container for collection.

[0017] The beneficial effects of the present invention are as follows: 1. The surface treatment device and method for pre-sintered blanks of metal powder injection molding described in the present invention utilizes a separation placement mechanism to allow the workpieces to fall onto each tray in turn, thereby achieving separation and placement of the workpieces. During the sintering process, the workpieces will not contact each other, thereby ensuring uniform heating of the workpieces and improving the sintering effect. In addition, the entire placement process does not require manual work by the staff, thereby reducing the labor intensity of the staff. Furthermore, when the workpiece falls onto the tray, the bottom of the workpiece contacts one end of a clamping block, the clamping block rotates, and the other end of the clamping block contacts the workpiece, thereby enabling the clamping block to place the workpiece under the action of the workpiece's own gravity. The sintering tray is fixed to prevent the workpiece from bouncing up and falling off the tray when the workpiece falls onto the tray. It also prevents the workpiece on the tray from shifting due to external force when the staff pushes the frame into the sintering device body, which leads to contact between the workpieces and affects the sintering effect. In addition, after sintering is completed, a containing container can be placed under the frame, and the worm can be manually rotated to drive the worm wheel and the placing plate to rotate 180 degrees, so that the workpiece on the tray can be dropped into the containing container for collection, thereby eliminating the need for the staff to manually remove multiple workpieces from the tray, which is more labor-saving.

[0018] 2. The present invention discloses a surface treatment device and method for pre-sintered blanks of metal powder injection molding. Since the workpiece may be blocked at the upper end of the discharge tube when the workpiece is in the feed hopper, thereby affecting the normal falling of the workpiece, after the workpiece is placed in the feed hopper, the motor 3 is started to drive the sprockets and the turntable on both sides to rotate. When the turntable rotates, the guide column can be used to drive the reciprocating rod to make a circular motion. At the same time, the reciprocating rod will slide at the front end of the limit rod, and the rear end of the limit rod will slide left and right, so that the reciprocating rod can move in a circle while remaining vertical. The workpiece can be pushed by the reciprocating rod to intensify the movement of the workpiece, avoid the workpiece being blocked in the discharge tube, and ensure the smooth falling of the workpiece. In addition, since the movement of the reciprocating rod can be regarded as a composite movement of the horizontal and vertical directions, when the reciprocating rod is at the lowest point, the reciprocating rod moves out of the feed hopper, and the reciprocating rod will not extend into the inner hole of the workpiece and hook it, causing the workpiece to be unable to fall normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle part; Figure 3 It is a schematic diagram of the local three-dimensional structure at the mounting plate; Figure 4 It is a schematic diagram of the local three-dimensional structure of the upper baffle and the lower baffle; Figure 5 It is a three-dimensional structural diagram of the relationship between the workpiece and the tray; Figure 6 It is a schematic diagram of the local three-dimensional structure at the sprocket; Figure 7 It is a schematic diagram of the local three-dimensional structure at the feed hopper; Figure 8 yes Figure 7 A partial enlarged view of point B in the middle; Fig. 9 It is a schematic diagram of the local three-dimensional structure at the support ring; Fig.10 It is a schematic diagram of the local three-dimensional structure of the worm.

[0021] In the figure: 1. sintering machine body; 2. threaded rod; 3. motor 1; 4. frame; 5. box door; 6. placement plate; 7. mounting plate; 8. electric push rod; 9. slide rod; 10. fixing plate; 11. support ring; 12. feed hopper; 13. discharge pipe; 14. motor 2; 15. upper baffle plate; 16. lower baffle plate; 17. support tray; 18. positioning column; 19. block; 20. motor 3; 21. sprocket; 22. chain; 23. turntable; 24. guide column; 25. reciprocating rod; 26. limit rod; 27. worm gear; 28. slide rail; 29. ​​placement plate; 30. worm. DETAILED DESCRIPTION

[0022] 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.

[0023] Please refer to Figure 1-Figure 10 The present invention provides a technical solution: a surface treatment device for pre-sintered blanks by metal powder injection molding, comprising a sintering machine body 1, a box door 5 is arranged at the front side of the sintering machine body 1, both sides of the inner cavity of the sintering machine body 1 are fixedly connected with slide rails 28, the slide rails 28 are plugged and slidably connected with a placement plate 29, one side of the placement plate 29 is fixedly connected with a frame 4, a placement plate 6 is rotatably arranged in the middle of the frame 4, a plurality of support trays 17 are fixedly connected to the upper end surface of the placement tray 6, and a separation placement mechanism for placing the workpiece to be sintered on the support tray 17 is arranged on the sintering machine body 1; The separation and placement mechanism includes a mounting plate 7 slidably connected to one side of the upper end surface of the sintering device body 1, and slide rods 9 are slidably connected on both sides of the mounting plate 7. A fixing plate 10 is fixedly connected to the front end of the sliding rod 9, and a support ring 11 is fixedly connected to the front side of the fixing plate 10. A feed hopper 12 is sleeved and fixedly connected to the support ring 11. A discharge pipe 13 is fixedly connected to the middle part of the lower end of the feed hopper 12, and an upper baffle 15 and a lower baffle 16 are rotatably provided at the lower right end of the discharge pipe 13, and the upper baffle 15 and the lower baffle 16 are fixedly connected.

[0024] In this embodiment, Figure 1-Figure 5 , Fig.10 As shown, a positioning column 18 is fixedly connected to the middle of the upper end surface of the tray 17 , and a plurality of clamping blocks 19 are rotatably arranged in an array along the axis of the positioning column 18 on the upper end surface of the tray 17 .

[0025] A second motor 14 is fixedly connected to the lower right end of the feeding tube 13 , and an output end of the second motor 14 is fixedly connected to an upper baffle 15 and a lower baffle 16 .

[0026] A threaded rod 2 is threadedly connected to the lower side of the mounting plate 7. Both ends of the threaded rod 2 are rotatably arranged on the sintering device body 1. A motor 3 is fixedly connected to the right side of the upper end surface of the sintering device body 1. The output end of the motor 3 is fixedly connected to the right end of the threaded rod 2.

[0027] An electric push rod 8 is fixedly connected to the middle part of the upper side of the rear end surface of the mounting plate 7 , and the piston end of the electric push rod 8 is fixedly connected to the middle part of the rear end surface of the fixing plate 10 .

[0028] A worm gear 27 is fixedly connected to the right end of the placement plate 6 , and the worm gear 27 is rotatably arranged on the frame 4 . A worm 30 is rotatably arranged in the middle of the right side of the frame 4 , and the worm 30 and the worm gear 27 are meshed with each other.

[0029] Specifically, metal powder injection molding technology is a new type of powder metallurgy forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. The entire process includes multiple steps, including a sintering step, in which the degreased blank is sintered to make it dense and form the final metal parts; when the existing metal powder injection molding sintering device is used, when multiple workpieces need to be sintered, the multiple workpieces are placed on the sintering disk in a fixed placement posture, and the workpieces do not contact each other, so as to ensure that each workpiece can be heated evenly, avoiding the problem of uneven heating caused by stacking or close arrangement of workpieces, thereby affecting the sintering quality and the final performance of the product, and placing the workpieces separately can also prevent the workpieces from sliding back and forth during the sintering process and affecting the sintering quality. However, the entire placement process needs to be performed manually by the staff, and after the sintering is completed, the staff also needs to manually remove the multiple workpieces. The whole process is relatively labor-intensive and increases the labor intensity of the staff; Therefore, in order to solve the above problems, this embodiment is used for the same batch of tubular workpieces with the same specifications. First, the placement plate 29 is slid on the inner side of the slide rail 28 by pulling, and the entire placement plate 6 is moved out of the sintering device body 1, so that the feed tube 13 is aligned with the support tray 17 at the rear end of the left side, and the protruding part of the lower baffle 16 in the initial state extends into the inner cavity of the feed tube 13, and the notch of the upper baffle 15 is aligned with the feed tube 13 without contacting the feed tube 13, and then multiple The workpiece is put into the feed hopper 12, and the workpiece slides down into the discharge pipe 13 under the action of gravity. The discharge pipe 13 matches the specifications of the workpiece. When the workpiece slides in the discharge pipe 13, it fits with the inner wall of the discharge pipe 13. When the lower end face of the workpiece contacts the lower baffle 16, the workpiece is blocked and cannot continue to fall. Then the workpieces in the discharge pipe 13 are in a stacked state, and then the motor 2 14 drives the upper baffle 15 and the lower baffle 16 to rotate. When the two rotate, the protruding part of the lower baffle 16 gradually moves away from the discharge pipe 1 3. When the lower baffle 16 is not in contact with the workpiece, the workpiece will fall under the action of gravity. At the moment when the lowermost workpiece falls, the protruding part of the upper baffle 15 will be inserted into the gap between the two workpiece fitting surfaces to prevent the subsequent workpieces from falling, so that only a single workpiece will fall on the support tray 17. At this time, under the action of the electric push rod 8, the feed tube 13 moves forward and aligns with another support tray 17. When the protruding part of the upper baffle 15 is away from the workpiece, the protruding part of the lower baffle 16 is just under the workpiece, which can support the bottom of the workpiece again. Then repeat the above operation, each workpiece can fall on the support tray 17, and the motor 3 is used to drive the threaded rod 2 to rotate, so that the feed tube 13 moves horizontally to make the workpiece fall on each support tray 17, thereby realizing the separation and placement of the workpieces. During the sintering process, the workpieces will not contact each other, ensuring uniform heating of the workpieces and improving the sintering effect. In addition, the entire placement process does not require manual work by the staff, reducing the labor intensity of the staff. When the workpiece falls on the support tray 17 under the action of gravity, the workpiece may bounce up and fall off the support tray 17. When the staff pushes the frame 4 into the sintering machine body 1, the workpiece on the support tray 17 may also be offset under the action of external force, thereby causing the workpieces to contact each other and affecting the sintering effect. Therefore, when the workpiece falls on the support tray 17, the workpiece will be sleeved on the positioning column 18, and when the bottom of the workpiece contacts one end of the clamping block 19, the clamping block 19 will rotate, and the other end of the clamping block 19 will contact the workpiece, so that the clamping block 19 can fix the workpiece under the action of the workpiece's own gravity, thereby avoiding the workpiece from bouncing up and falling off the support tray 17 when the workpiece falls on the support tray 17, and also avoiding the workpiece on the support tray 17 being offset under the action of external force when the staff pushes the frame 4 into the sintering machine body 1, thereby causing the workpieces to contact each other and affecting the sintering effect. After the frame 4 enters the sintering machine body 1, the box door 5 is closed to carry out sintering. After the workpiece is sintered, the box door 5 is opened again to take the frame 4 out of the sintering machine body 1. At the same time, a container can be placed under the frame 4. The worm 30 is manually rotated to drive the worm wheel 27 and the placement plate 6 to rotate 180 degrees, so that the workpiece on the tray 17 can fall into the container for collection, thereby eliminating the need for the staff to manually remove multiple workpieces from the tray 17, which is more labor-saving. Therefore, by utilizing the separation placement mechanism, the workpieces can be dropped onto each tray 17 in turn, thus realizing the separation and placement of the workpieces. During the sintering process, the workpieces will not contact each other, thus ensuring uniform heating of the workpieces and improving the sintering effect. Moreover, the entire placement process does not require manual work by the staff, thus reducing the labor intensity of the staff. Moreover, when the workpiece drops onto the tray 17, the bottom of the workpiece contacts one end of the clamping block 19, the clamping block 19 rotates, and the other end of the clamping block 19 contacts the workpiece, so that the clamping block 19 can fix the workpiece under the action of the workpiece's own gravity, thus preventing the workpiece from falling onto the tray 17. When the frame 4 is put up, the workpiece bounces up and leaves the tray 17, which also avoids the situation that when the staff pushes the frame 4 into the sintering machine body 1, the workpiece on the tray 17 is offset under the action of external force, which leads to contact between the workpieces and affects the sintering effect. In addition, after the sintering is completed, a containing container can be placed under the frame 4, and the worm 30 can be manually rotated to drive the worm wheel 27 and the placement plate 6 to rotate 180 degrees, so that the workpiece on the tray 17 can fall into the containing container for collection, thereby eliminating the process of manually removing multiple workpieces from the tray 17 by the staff, which is more labor-saving.

[0030] In this embodiment, Figure 6-Figure 9 As shown, two limit rods 26 are slidably connected to the upper left end of the front end surface of the sintering device body 1 , and a reciprocating rod 25 is slidably connected to the front end of the limit rod 26 . The reciprocating rod 25 can pass through the through hole at the bottom of the feed hopper 12 .

[0031] The reciprocating rod 25 is rotatably provided with a guide column 24, and a turntable 23 is fixedly connected to the rear end of the guide column 24. The turntable 23 is rotatably provided on the sintering device body 1, and a sprocket 21 is fixedly connected to one side of the turntable 23. The sprocket 21 is rotatably provided on the sintering device body 1, and the sprocket 21 is meshedly connected with a chain 22.

[0032] A motor 3 20 is fixedly connected to the front end of the left side of the upper end surface of the sintering device body 1 , and the output end of the motor 3 20 is fixedly connected to the right sprocket 21 .

[0033] Specifically, since the workpiece may be blocked at the upper end of the discharge pipe 13 when the workpiece is in the feed hopper 12, thereby affecting the normal falling of the workpiece, after the workpiece is placed in the feed hopper 12, the motor 20 is started to drive the sprockets 21 and the turntable 23 on both sides to rotate. When the turntable 23 rotates, the guide column 24 can be used to drive the reciprocating rod 25 to make a circular motion. At the same time, the reciprocating rod 25 will slide at the front end of the limit rod 26, and the rear end of the limit rod 26 will slide left and right, so that the reciprocating rod 25 can slide at the front end of the limit rod 26. 5 makes a circle while keeping it vertical, that is, the reciprocating rod 25 can push the workpiece to intensify the movement of the workpiece, avoid the workpiece from being blocked on the feeding pipe 13, and ensure the normal falling of the workpiece. In addition, since the movement of the reciprocating rod 25 can be regarded as a composite movement of the horizontal and vertical directions, when the reciprocating rod 25 is at the lowest point, the reciprocating rod 25 moves out of the feeding hopper 12, and the reciprocating rod 25 will not extend into the inner hole of the workpiece and hook it, causing the workpiece to be unable to fall normally.

[0034] A surface treatment method for a pre-sintered blank formed by metal powder injection molding comprises the following specific steps: S1. First, by pulling, the placement plate 29 is slid inside the slide rail 28, and the entire placement plate 6 is moved out of the sintering machine body 1, so that the feed tube 13 is aligned with the support tray 17 at the rear end of the left side, and the protruding part of the lower baffle 16 in the initial state extends into the inner cavity of the feed tube 13, and the notch of the upper baffle 15 is aligned with the feed tube 13 without contacting the feed tube 13; S2. Put a plurality of workpieces into the feed hopper 12. The workpieces slide down into the feeding tube 13 under the action of gravity. When the workpieces slide in the feeding tube 13, they fit with the inner wall of the feeding tube 13. When the lower end surface of the workpiece contacts the lower baffle 16, the workpiece is blocked and cannot continue to descend, driving the upper baffle 15 and the lower baffle 16 to rotate. When the two rotate, the protruding part of the lower baffle 16 gradually moves away from the feeding tube 13. When the lower baffle 16 does not contact the workpiece, the workpiece will fall down under the action of gravity. At the moment when the lowermost workpiece falls, the protruding part of the upper baffle 15 The protruding portion will be inserted into the gap between the two workpiece contact surfaces to prevent subsequent workpieces from falling, so that only a single workpiece can fall on the support tray 17. At this time, the feed tube 13 is driven to move forward and align with another support tray 17. When the protruding portion of the upper baffle 15 is away from the workpiece, the protruding portion of the lower baffle 16 is just under the workpiece, which can support the bottom of the workpiece. Then, the above operation is repeated to make each workpiece fall on the support tray 17, and the feed tube 13 is driven to move horizontally to make the workpiece fall on each support tray 17. S3. When the workpiece falls onto the support tray 17, the workpiece will be sleeved on the positioning column 18, and when the bottom of the workpiece contacts one end of the clamping block 19, the clamping block 19 will rotate, and the other end of the clamping block 19 will contact the workpiece, so that the clamping block 19 can fix the workpiece under the action of the workpiece's own gravity; S4. After the frame 4 enters the sintering machine body 1, the box door 5 is closed to carry out sintering. After the workpiece is sintered, the box door 5 is opened again to take the frame 4 out of the sintering machine body 1. At the same time, a containing container can be placed under the frame 4. The worm 30 is manually rotated to drive the worm wheel 27 and the placing plate 6 to rotate 180 degrees, so that the workpiece on the tray 17 can fall into the containing container for collection.

[0035] Working principle: First, by pulling, the placement plate 29 is slid on the inner side of the slide rail 28, and the entire placement plate 6 is moved out of the sintering device body 1, so that the feeding tube 13 is aligned with the supporting tray 17 at the rear end of the left side, and the protruding part of the lower baffle 16 in the initial state extends into the inner cavity of the feeding tube 13, and the notch of the upper baffle 15 is aligned with the feeding tube 13 and does not contact the feeding tube 13, and then multiple workpieces are put into the feed hopper 12, and the workpieces slide into the feeding tube 13 under the action of gravity, and the feeding tube 13 matches the specifications of the workpieces. When the workpiece slides in the feeding tube 13, it fits with the inner wall of the feeding tube 13, and when the lower end face of the workpiece contacts the lower baffle 16, the workpiece is blocked and cannot continue to descend, and then is in the lower position. The workpieces in the material tube 13 are all in a stacked state, and then the motor 2 14 drives the upper baffle 15 and the lower baffle 16 to rotate. When the two rotate, the protruding part of the lower baffle 16 gradually moves away from the feed tube 13. When the lower baffle 16 does not contact the workpiece, the workpiece will fall under the action of gravity. At the moment when the lower workpiece falls, the protruding part of the upper baffle 15 will be inserted into the gap between the fitting surfaces of the two workpieces to prevent subsequent workpieces from falling, so that only a single workpiece can fall on the support tray 17. At this time, under the action of the electric push rod 8, the feed tube 13 is moved forward and aligned with the other support tray 17. When the protruding part of the upper baffle 15 is away from the workpiece, the protruding part of the lower baffle 16 is just under the workpiece, which can also The above operation is then repeated to make each workpiece fall onto the support tray 17, and the motor 3 is used to drive the threaded rod 2 to rotate, so that the feed tube 13 moves horizontally to make the workpiece fall onto each support tray 17, thereby realizing the separation and placement of the workpieces. During the sintering process, the workpieces will not contact each other, ensuring uniform heating of the workpieces and improving the sintering effect. In addition, the entire placement process does not require manual work by the staff, reducing the labor intensity of the staff. However, since the workpiece falls onto the support tray 17 under the action of gravity, the workpiece may bounce up and fall off the support tray 17, and when the staff pushes the frame 4 into the sintering device body 1, the workpiece on the support tray 17 The workpieces may also be deflected under the action of external forces, thereby causing the workpieces to contact each other and affecting the sintering effect. Therefore, when the workpiece falls onto the support tray 17, the workpiece will be sleeved on the positioning column 18, and when the bottom of the workpiece contacts one end of the clamping block 19, the clamping block 19 will rotate, and the other end of the clamping block 19 will contact the workpiece, so that the clamping block 19 can fix the workpiece under the action of the workpiece's own gravity, thereby avoiding the situation where the workpiece bounces up and separates from the support tray 17 when the workpiece falls onto the support tray 17, and also avoiding the situation where the workpiece on the support tray 17 is deflected under the action of external forces when the staff pushes the frame 4 into the sintering machine body 1, thereby causing the workpieces to contact each other and affecting the sintering effect.After the frame 4 enters the sintering machine body 1, the box door 5 is closed to carry out sintering. After the workpiece is sintered, the box door 5 is opened again to take the frame 4 out of the sintering machine body 1. At the same time, a containing container can be placed under the frame 4. The worm 30 is manually rotated to drive the worm wheel 27 and the placement plate 6 to rotate 180 degrees, so that the workpiece on the tray 17 can fall into the containing container for collection, thereby eliminating the need for the staff to manually remove multiple workpieces from the tray 17, which is more labor-saving; thus, the separated placement mechanism can be used to make the workpieces fall on each tray 17 in turn, thereby realizing the separated placement of the workpieces. During the sintering process, the workpieces will not contact each other, ensuring The uniform heating of the workpiece is ensured, the sintering effect is improved, and the entire placing process does not require manual operation by the staff, which reduces the labor intensity of the staff. Moreover, when the workpiece falls onto the support tray 17, the bottom of the workpiece contacts one end of the clamping block 19, the clamping block 19 rotates, and the other end of the clamping block 19 contacts the workpiece, so that the clamping block 19 can fix the workpiece under the action of the workpiece's own gravity, thereby avoiding the situation where the workpiece bounces up and separates from the support tray 17 when the workpiece falls onto the support tray 17, and also avoiding the workpiece on the support tray 17 being offset under the action of external force when the staff pushes the frame 4 into the sintering device body 1, thereby causing the workpieces to contact each other. , affecting the sintering effect, and after sintering is completed, a holding container can be placed under the frame 4, and the worm 30 can be manually rotated to drive the worm wheel 27 and the placement plate 6 to rotate 180 degrees, so that the workpieces on the tray 17 can be dropped into the holding container for collection, thereby eliminating the need for the staff to manually remove multiple workpieces from the tray 17, which is more labor-saving. When the workpiece is in the feed hopper 12, the workpiece may be blocked at the upper end of the discharge pipe 13, thereby affecting the normal falling of the workpiece. Therefore, after the workpiece is placed in the feed hopper 12, the motor 20 can be started to drive the sprockets 21 and the turntable 23 on both sides to rotate. When the turntable 23 rotates, The guide column 24 drives the reciprocating rod 25 to make circular motion. At the same time, the reciprocating rod 25 slides at the front end of the limit rod 26, and the rear end of the limit rod 26 slides left and right, so that the reciprocating rod 25 can move in a circle while remaining vertical. The reciprocating rod 25 can push the workpiece to intensify the movement of the workpiece, avoid the workpiece from being blocked on the feeding tube 13, and ensure the normal falling of the workpiece. In addition, since the movement of the reciprocating rod 25 can be regarded as a composite movement of the horizontal and vertical directions, when the reciprocating rod 25 is at the lowest point, the reciprocating rod 25 moves out of the feed hopper 12, and the reciprocating rod 25 will not extend into the inner hole of the workpiece and hook it, causing the workpiece to be unable to fall normally. ;

[0036] 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 surface treatment device for pre-sintered blanks by metal powder injection molding, comprising a sintering device body (1), characterized in that: A box door (5) is arranged at the front side of the sintering machine body (1); both sides of the inner cavity of the sintering machine body (1) are fixedly connected with slide rails (28); the slide rails (28) are plugged and slidably connected with a placement plate (29); one side of the placement plate (29) is fixedly connected with a frame (4); a placement plate (6) is rotatably arranged at the middle of the frame (4); a plurality of support plates (17) are fixedly connected to the upper end surface of the placement plate (6); and a partition placement mechanism for placing workpieces to be sintered on the support plates (17) is arranged on the sintering machine body (1); The partition placement mechanism comprises a mounting plate (7) slidably connected to one side of the upper end surface of the sintering device body (1), the mounting plate (7) is slidably connected to slide bars (9) on both sides, the front end of the slide bar (9) is fixedly connected to a fixing plate (10), the front side of the fixing plate (10) is fixedly connected to a support ring (11), the support ring (11) is sleeved and fixedly connected to a feed hopper (12), the middle part of the lower end of the feed hopper (12) is fixedly connected to a discharge pipe (13), the lower right end of the discharge pipe (13) is rotatably provided with an upper baffle (15) and a lower baffle (16), and the upper baffle (15) is fixedly connected to the lower baffle (16).

2. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: A positioning column (18) is fixedly connected to the middle of the upper end surface of the support tray (17); the upper end surface of the support tray (17) is distributed in an array along the axis of the positioning column (18) and is rotatably provided with a plurality of clamping blocks (19).

3. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: The lower right end of the discharge pipe (13) is fixedly connected to a second motor (14), and the output end of the second motor (14) is fixedly connected to an upper baffle (15) and a lower baffle (16).

4. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: A threaded rod (2) is threadedly connected to the lower side of the mounting plate (7), and both ends of the threaded rod (2) are rotatably arranged on the sintering machine body (1). A motor 1 (3) is fixedly connected to the right side of the upper end surface of the sintering machine body (1), and the output end of the motor 1 (3) is fixedly connected to the right end of the threaded rod (2).

5. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: An electric push rod (8) is fixedly connected to the middle portion of the upper side of the rear end surface of the mounting plate (7), and a piston end of the electric push rod (8) is fixedly connected to the middle portion of the rear end surface of the fixing plate (10).

6. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: A worm wheel (27) is fixedly connected to the right end of the placement plate (6); the worm wheel (27) is rotatably arranged on the frame (4); a worm (30) is rotatably arranged in the middle of the right side of the frame (4); the worm (30) and the worm wheel (27) are meshed with each other.

7. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 1, characterized in that: The upper left end of the front end surface of the sintering device body (1) is slidably connected to two limit rods (26), and the front end of the limit rod (26) is slidably connected to a reciprocating rod (25), and the reciprocating rod (25) can pass through a through hole at the bottom of the feed hopper (12).

8. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 7, characterized in that: The reciprocating rod (25) is rotatably provided with a guide column (24), the rear end of the guide column (24) is fixedly connected to a turntable (23), the turntable (23) is rotatably provided on the sintering machine body (1), one side of the turntable (23) is fixedly connected to a sprocket (21), the sprocket (21) is rotatably provided on the sintering machine body (1), and the sprocket (21) is meshingly connected to a chain (22).

9. The surface treatment device for pre-sintered blanks by metal powder injection molding according to claim 8, characterized in that: A motor three (20) is fixedly connected to the front end of the left side of the upper end surface of the sintering machine body (1), and the output end of the motor three (20) is fixedly connected to the sprocket wheel (21) on the right side.

10. A method for surface treatment of a pre-sintered blank by metal powder injection molding, characterized in that: The processing device according to any one of claims 1 to 9 is used for processing, comprising the following specific steps: S1. First, by pulling, the placement plate (29) is slid inside the slide rail (28), and the entire placement plate (6) is removed from the sintering device body (1), so that the feed tube (13) is aligned with the support plate (17) at the rear end of the left side, and the protruding portion of the lower baffle (16) in the initial state extends into the inner cavity of the feed tube (13), while the notch of the upper baffle (15) is aligned with the feed tube (13) and does not contact the feed tube (13); S2. Put a plurality of workpieces into the feed hopper (12). The workpieces slide down into the feed tube (13) under the action of gravity. When the workpieces slide in the feed tube (13), they fit into the inner wall of the feed tube (13). When the lower end surface of the workpiece contacts the lower baffle (16), the workpiece is blocked and cannot continue to descend, driving the upper baffle (15) and the lower baffle (16) to rotate. When the two rotate, the protruding portion of the lower baffle (16) gradually moves away from the feed tube (13). When the lower baffle (16) does not contact the workpiece, the workpiece falls down under the action of gravity. At the moment when the lowermost workpiece falls down, the upper baffle (15) ) will be inserted into the gap between the two workpiece contact surfaces to prevent subsequent workpieces from falling, so that only a single workpiece can fall onto the support tray (17). At this time, the feed tube (13) is driven to move forward and align with another support tray (17). When the protruding portion of the upper baffle (15) is away from the workpiece, the protruding portion of the lower baffle (16) is just below the workpiece and can support the bottom of the workpiece. Then, the above operation is repeated to make each workpiece fall onto the support tray (17), and the feed tube (13) is driven to move horizontally to make the workpiece fall onto each support tray (17); S3. When the workpiece falls onto the support tray (17), the workpiece is sleeved on the positioning column (18), and when the bottom of the workpiece contacts one end of the clamping block (19), the clamping block (19) rotates, and the other end of the clamping block (19) contacts the workpiece, so that the clamping block (19) fixes the workpiece under the action of the workpiece's own gravity; S4. After the frame (4) enters the sintering machine body (1), the box door (5) is closed to carry out sintering. After the workpiece is sintered, the box door (5) is opened again to take the frame (4) out of the sintering machine body (1). At the same time, a container can be placed under the frame (4). The worm (30) is manually rotated to drive the worm wheel (27) and the placement plate (6) to rotate 180 degrees, so that the workpiece on the tray (17) can fall into the container for collection.

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