Powder metallurgy dry pressing forming die

Abstract

The invention discloses a powder metallurgy dry pressing forming die, and relates to the technical field of powder metallurgy. Comprising a mold body, the bottom of the mold body is connected with a connecting frame, a motor is installed on the inner side of the connecting frame, the output end of the motor is connected with a rotating rod, the rotating rod is sleeved with a long gear and further sleeved with a transmission gear, and the inner side of the connecting frame is connected with a mold frame. According to the powder filling device, a motor is started to enable a rotating rod to rotate clockwise, the rotating rod rotates clockwise to drive a knocking block to knock the outer side wall of a mold frame, the mold frame vibrates after being knocked to drive powder in the mold frame to vibrate, and the situation that the powder is stacked in the powder filling process is reduced; the motor is started to drive the rotating rod to rotate anticlockwise, the rotating rod rotates anticlockwise to drive the pushing plate and the knocking block to move, the connecting position of the mold and the workpiece is loosened through knocking, and the situation that the workpiece is damaged in the demolding process is reduced.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy technology, specifically to a powder metallurgy dry pressing mold. Background Technology

[0002] Powder metallurgy is an advanced manufacturing technology that produces materials and parts by pressing metal or non-metal powders into shapes and then sintering and solidifying them at temperatures below their melting points. Powder metallurgy shares similarities with ceramic production, both belonging to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used in the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it plays an indispensable role in modern manufacturing, especially in the fields of automobiles, tools, electronics, and aerospace. Furthermore, with the continuous development of new materials and processes, its application scope and importance continue to expand. Dry pressing molds are required in the powder metallurgy process.

[0003] In existing dry pressing molds, after the workpiece is extruded, it is pushed out of the mold frame by a pusher plate inside the mold frame. Since the workpiece is in a green state immediately after extrusion, the overall structure is relatively fragile. During the demolding process, the workpiece may be damaged by friction with the inner wall of the mold frame. In addition, when the powder is injected into the mold frame, the powder may accumulate in one place. Although the powder is scraped off by the scraper of the powder replenishment structure, the powder inside the mold frame is still uneven, which will increase the instability of the workpiece structure.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a powder metallurgy dry pressing mold to solve the problems in the background art where the workpiece is damaged by friction with the inner wall of the mold frame during the demolding process, and powder accumulates when the powder is injected into the mold frame, which reduces the structural stability of the workpiece. The technical solution of this invention provides a solution that is significantly different from the existing technology, addressing the problem that the existing technology solutions are too simplistic.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a powder metallurgy dry pressing mold, comprising a mold body, a connecting frame connected to the bottom of the mold body, a motor installed inside the connecting frame, a rotating rod connected to the output end of the motor, a long gear sleeved on the rotating rod, a transmission gear sleeved on the rotating rod, a mold frame connected inside the connecting frame, a toothed ring provided on the outer side of the mold frame, the toothed ring meshing with the transmission gear, a guide ring connected to the outer wall of the mold frame, a striking block slidably connected inside the toothed ring, a rotating roller provided on the side of the striking block near the guide ring, and the rotating roller fitting against the corrugated protrusion inside the guide ring, a lifting frame provided inside the connecting frame, a limiting sleeve sleeved at the center of the lifting frame, a ratchet rotatably connected inside the lifting frame via a hollow rotating ring, a reciprocating screw connected to the inner ring of the ratchet, a lifting rod sleeved on the reciprocating screw, and a push plate slidably connected above the lifting rod; An adjustment component is located below the lifting frame, and a collection component is located inside the connecting frame.

[0007] Preferably, the adjusting component has a threaded block connected to the lower part of the lifting frame, the threaded block is threadedly connected to a threaded rod, a limiting frame is connected to the upper part of the bottom of the inner side of the connecting frame, and the limiting frame is slidably connected to the lifting frame, a base plate is slidably connected to the inner side of the mold frame, a support rod is connected to the bottom of the base plate, and the bottom end of the support rod is in contact with the lifting frame.

[0008] Preferably, the collecting component has a partition connected to the inner side wall of the connecting frame, a collecting frame is provided inside the partition, the connecting frame has a collecting hole, and the collecting frame is located below the collecting hole.

[0009] Preferably, a connecting ring is connected to the upper inner side of the connecting frame, and the connecting ring is rotatably connected to the toothed ring.

[0010] Preferably, the striking block has an installation groove on one side of the mold frame, and a striking roller is rotatably connected inside the installation groove.

[0011] Preferably, the bottom of the push plate has a first limiting protrusion, which is slidably connected to the lifting rod, and the inner side of the limiting sleeve has a second limiting protrusion, which is slidably connected to the lifting rod.

[0012] Preferably, the inner side of the threaded rod is provided with a cross-shaped limiting groove, and the cross-shaped limiting groove is slidably connected to an inclined turntable. A sliding buckle is provided on one side of the inclined turntable, and the sliding buckle is connected to the bottom of the connecting frame. The sliding buckle is provided with an inclined protrusion, and the inclined protrusion fits against the inclined turntable.

[0013] Preferably, there are two sets of support rods, and both sets of support rods are slidably connected to the mold frame.

[0014] Preferably, a spring clip is provided on the inner side of the partition, and the protruding part of the spring clip is in contact with the collection frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the rotating rod is rotated clockwise by starting the motor. The clockwise rotation of the rotating rod drives the striking block to strike the outer wall of the mold frame. After being struck, the mold frame vibrates, causing the powder inside the mold frame to vibrate, reducing the accumulation of powder during the filling process. When demolding, the rotating rod is rotated counterclockwise by starting the motor. The counterclockwise rotation of the rotating rod can drive the push plate and the striking block to move. The striking causes the connection between the mold and the workpiece to loosen, reducing the possibility of damage to the workpiece during demolding.

[0016] 2. In this invention, rotating the threaded rod can drive the threaded block to move vertically. The vertical movement of the threaded block can drive the lifting frame to move vertically. The vertical movement of the lifting frame can adjust the height of the push plate and the base plate, thereby adjusting the thickness of the extruded workpiece, making it convenient for workers to start extruding workpieces of different thicknesses according to actual needs.

[0017] 3. The present invention, by combining the collection frame with the external powder replenishment structure, can collect excess dust on the surface of the connecting frame, making it convenient for workers to recycle and reuse the dust. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the connecting frame of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the top surface structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the side structure of the mold frame of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the front structure of the adjustment component of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point D; Figure 10 This is a schematic diagram of the side structure of the adjustment component of the present invention.

[0019] In the diagram: 1. Mold body; 2. Connecting frame; 3. Motor; 4. Rotating rod; 5. Long gear; 6. Transmission gear; 7. Mold frame; 8. Gear ring; 9. Knocking block; 10. Ratchet; 11. Guide ring; 12. Lifting frame; 13. Limiting sleeve; 14. Reciprocating screw; 15. Lifting rod; 16. Push plate; 17. Adjusting assembly; 171. Threaded block; 172. Threaded rod; 173. Limiting frame; 174. Base plate; 175. Support rod; 18. Collection assembly; 181. Partition plate; 182. Collection frame. Detailed Implementation

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

[0021] Please see Figures 1-10This invention provides a technical solution: a powder metallurgy dry pressing mold, comprising a mold body 1, a connecting frame 2 connected to the bottom of the mold body 1, a motor 3 installed inside the connecting frame 2, a rotating rod 4 connected to the output end of the motor 3, a long gear 5 sleeved on the rotating rod 4, and a transmission gear 6 sleeved on the rotating rod 4. A mold frame 7 is connected inside the connecting frame 2, a toothed ring 8 is provided on the outer side of the mold frame 7, and the toothed ring 8 is meshed with the transmission gear 6. A guide ring 11 is connected to the outer wall of the mold frame 7, and a striking block 9 is slidably connected inside the toothed ring 8, and the striking block 9 is located on the side of the guide ring 11. A rotating roller is attached to the corrugated protrusion on the inner side of the guide ring 11. A lifting frame 12 is provided inside the connecting frame 2. A limiting sleeve 13 is sleeved in the center of the lifting frame 12. A ratchet 10 is rotatably connected to the inner side of the lifting frame 12 through a hollow rotating ring. A reciprocating screw 14 is connected to the inner ring of the ratchet 10. A lifting rod 15 is sleeved on the reciprocating screw 14. A push plate 16 is slidably connected above the lifting rod 15. The motor can be started to move the rotating rod to the external collection box 182, and the rotating rod will move to the external collection box 182 in a clockwise direction. The needle rotates, and the rotating rod moves to the external collection box 182. 4 moves to the external collection box 182, and clockwise rotation drives the striking block to the external collection box 182. 9 moves to the external collection box 182, striking the outer wall of the mold frame. The mold frame vibrates after being struck, causing the internal powder to vibrate, reducing powder accumulation during filling. This is also activated during demolding. The motor drives the rotating rod to the external collection box 182, and ... Adjustment component 17 is located below lifting frame 12, and collection component 18 is located inside connecting frame 2.

[0022] In one embodiment of the present invention, the adjusting component 17 has a threaded block 171 connected to the lower part of the lifting frame 12. The threaded block 171 is threadedly connected to a threaded rod 172. A limiting frame 173 is connected to the upper part of the bottom of the inner side of the connecting frame 2, and the limiting frame 173 is slidably connected to the lifting frame 12. A base plate 174 is slidably connected to the inner side of the mold frame 7. A support rod 175 is connected to the bottom of the base plate 174, and the bottom end of the support rod 175 is in contact with the lifting frame 12. By rotating the threaded rod to the outer collection frame 182, the threaded block can be pushed to the outer collection frame 182, and the threaded rod 171 can be pushed to the outer collection frame 182 to perform vertical movement. The threaded block moves to the external collection frame 182, and 171 moves to the external collection frame 182. The vertical movement can drive the lifting frame to the external collection frame 182, and 12 moves to the external collection frame 182. The vertical movement can adjust the height of the push plate to the external collection frame 182, 16 to the external collection frame 182, and the bottom plate to the external collection frame 182, and 174 to the external collection frame 182. In this way, the thickness of the extruded workpiece can be adjusted, so that the staff can start extruding workpieces of different thicknesses according to actual needs. In one embodiment of the present invention, the collecting component 18 has a partition 181 connected to the inner wall of the connecting frame 2, and a collecting frame 182 is provided inside the partition 181. The connecting frame 2 has a collecting hole, and the collecting frame 182 is located below the collecting hole. The dust can be collected from the surface of the connecting frame to the external collecting frame 182 and from the external collecting frame 182 in conjunction with the external powder replenishment structure, so as to facilitate the recycling of dust by the staff. In one embodiment of the present invention, a connecting ring is connected to the upper inner side of the connecting frame 2, and the connecting ring is rotatably connected to the toothed ring 8. By setting the connecting ring, the toothed ring 8 is limited, thereby improving the stability of the toothed ring 8 during rotation. The striking block 9 has an installation groove on one side of the mold frame 7, and a striking roller is rotatably connected inside the installation groove. By setting the striking roller, wear caused by striking the outer wall of the mold frame 7 is reduced, thereby ensuring the service life of the mold frame 7. The bottom of the push plate 16 has a first limiting protrusion, and the first limiting protrusion is slidably connected to the lifting rod 15. The inner side of the limiting sleeve 13 has a second limiting protrusion, and the second limiting protrusion is slidably connected to the lifting rod 15. By setting the first limiting protrusion and the second limiting protrusion, the limiting sleeve 13 is limited, thereby preventing the limiting sleeve 13 from rotating with the reciprocating screw 14. In one embodiment of the present invention, a cross-shaped limiting groove is provided on the inner side of the threaded rod 172, and a slidable inclined turntable is slidably connected to the cross-shaped limiting groove. A sliding buckle is provided on one side of the inclined turntable, and the sliding buckle is connected to the bottom of the connecting frame 2. The sliding buckle is provided with a sloping protrusion, and the sloping protrusion fits against the inclined turntable. By setting the sliding buckle, the threaded rod 172 can be limited, reducing the possibility of the threaded rod 172 loosening due to external influences. The fixing of the sliding buckle can be released by pressing the inclined turntable, which is convenient and quick. As one embodiment of the present invention, two sets of support rods 175 are provided, and both sets of support rods 175 are slidably connected to the mold frame 7. By providing two sets of support rods 175 to support the base plate 174, the lifting frame 12 can push the base plate 174 to perform the same movement during vertical movement. As one embodiment of the present invention, a spring buckle is provided on the inner side of the partition 181, and the protruding part of the spring buckle is in contact with the collection frame 182. By providing the spring buckle, the collection frame 182 can be limited and fixed, ensuring the stability of the collection frame 182 during the powder collection process, and making it convenient for workers to disassemble or install the collection frame 182. Working principle: First, when the external powder replenishment structure is used to replenish powder inside the mold frame 7, the starting motor 3 drives the rotating rod 4 to rotate clockwise, which in turn drives the long gear 5 and the transmission gear 6 to rotate. The clockwise rotation of the long gear 5 drives the inner wheel of the ratchet 10 to rotate, thereby avoiding the vertical movement of the push plate 16 from affecting the dust filling process. Since the transmission gear 6 is meshed with the toothed ring 8, the rotation of the transmission gear 6 can drive the toothed ring 8 to rotate. The rotation of the toothed ring 8 can drive the striking block 9 to rotate. Since the rotating roller of the striking block 9 is in contact with the corrugated protrusions on the inner wall of the guide ring 11, the striking block 9 will move horizontally during the rotation due to the influence of the corrugated protrusions and the rotating roller. The horizontal movement of the striking block 9 drives the striking roller to strike the outer wall of the mold frame 7. After the outer wall of the mold frame 7 is struck, the mold frame 7 will vibrate. The vibration of the mold frame 7 will cause the dust inside the mold frame 7 to vibrate, thereby reducing the accumulation of dust during the filling process. Secondly, after the dust filling is completed, the scraper of the dust replenishment structure will push the excess dust to the top of the collection hole of the connecting frame 2. The dust will fall into the collection frame 182 under the influence of gravity. Then, the pressing structure of the mold body 1 can be activated to extrude and shape the dust inside the mold frame 7. After the workpiece is shaped, the motor 3 is started to drive the rotating rod 4 to rotate counterclockwise. The counterclockwise rotation of the rotating rod 4 can drive the long gear 5 and the transmission gear 6 to rotate. During the rotation of the transmission gear 6, the striking block 9 will move to strike the outside of the mold frame 7 to make it vibrate. The counterclockwise rotation of the long gear 5 will also drive the inner wheel of the ratchet 10 to rotate. The rotation of the inner wheel of the ratchet 10 drives the reciprocating screw 14 to rotate. Since the limiting sleeve 13 and the lifting rod 15 are slidably connected, Therefore, the rotation of the reciprocating screw 14 will drive the lifting rod 15 to perform vertical reciprocating motion. Since there is a certain gap between the push plate 16 and the inner side of the lifting rod 15, the vibration generated by the striking block 9 before the lifting rod 15 moves upward and pushes the push plate 16 upward will cause the connection between the workpiece and the mold frame 7 to loosen. After the lifting rod 15 and the inner side of the push plate 16 are in contact, the push plate 16 will be pushed upward. During the upward movement of the push plate 16, the workpiece will be pushed to separate from the mold frame 7. Subsequently, the workpiece enters the external collection frame 182 under the action of the external powder replenishment structure. After the lifting rod 15 pushes the push plate 16 parallel to the top of the mold frame 7, it will move downward. After the lifting rod 15 moves downward a certain distance, it will drive the push plate 16 to return to the initial position. Finally, when the height of the push plate 16 needs to be adjusted, push the turntable upward to release the sliding buckle, and then rotate the turntable. Since the turntable is slidably connected to the cross-shaped limiting groove of the threaded rod 172, the rotation of the turntable drives the threaded rod 172 to rotate. Since the threaded rod 172 is threadedly connected to the threaded block 171, and the lifting frame 12 is slidably connected to the limiting frame 173, the rotation of the threaded rod 172 will drive the threaded block 171 to move upward. The upward movement of the threaded block 171 will drive the lifting frame 12 to move upward. The upward movement of the lifting frame 12 will drive the lifting rod 15 to move upward. The upward movement of the lifting frame 12 will also drive the support rod 175 to move upward. The upward movement of the support rod 175 will drive the base plate 174 to move upward. Thus, the depth inside the mold frame 7 can be adjusted, thereby enabling the processing of workpieces of different thicknesses.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A powder metallurgy dry pressing mold, comprising a mold body (1), characterized in that: The bottom of the mold body (1) is connected to a connecting frame (2). A motor (3) is installed inside the connecting frame (2). A rotating rod (4) is connected to the output end of the motor (3). A long gear (5) is sleeved on the rotating rod (4). A transmission gear (6) is also sleeved on the rotating rod (4). A mold frame (7) is connected inside the connecting frame (2). A toothed ring (8) is provided on the outside of the mold frame (7). The toothed ring (8) meshes with the transmission gear (6). A guide ring (11) is connected to the outer wall of the mold frame (7). A striking mechanism is slidably connected inside the toothed ring (8). Block (9), and the striking block (9) is located on the side of the guide ring (11) with a rotating roller, and the rotating roller is in contact with the corrugated protrusion on the inner side of the guide ring (11). A lifting frame (12) is provided on the inner side of the connecting frame (2). A limiting sleeve (13) is sleeved in the center of the lifting frame (12). A ratchet (10) is rotatably connected to the inner side of the lifting frame (12) through a hollow rotating ring. A reciprocating screw (14) is connected to the inner ring of the ratchet (10). A lifting rod (15) is sleeved on the reciprocating screw (14). A push plate (16) is slidably connected above the lifting rod (15). Adjustment component (17), the adjustment component (17) is disposed below the lifting frame (12); Collection component (18) is disposed inside the connecting frame (2).

2. The powder metallurgy dry pressing mold according to claim 1, characterized in that: The adjusting component (17) has a threaded block (171) connected to the lower part of the lifting frame (12). The threaded block (171) is threadedly connected to a threaded rod (172). A limiting frame (173) is connected to the upper part of the bottom of the inner side of the connecting frame (2), and the limiting frame (173) is slidably connected to the lifting frame (12). A base plate (174) is slidably connected to the inner side of the mold frame (7). A support rod (175) is connected to the bottom of the base plate (174), and the bottom end of the support rod (175) is in contact with the lifting frame (12).

3. The powder metallurgy dry pressing mold according to claim 1, characterized in that: The collecting component (18) has a partition (181) connected to the inner wall of the connecting frame (2), and a collecting frame (182) is provided inside the partition (181). The connecting frame (2) has a collecting hole, and the collecting frame (182) is located below the collecting hole.

4. The powder metallurgy dry pressing mold according to claim 1, characterized in that: A connecting ring is connected to the upper inner side of the connecting frame (2), and the connecting ring is rotatably connected to the toothed ring (8).

5. The powder metallurgy dry pressing mold according to claim 1, characterized in that: The striking block (9) has an installation groove on one side of the mold frame (7), and a striking roller is rotatably connected inside the installation groove.

6. The powder metallurgy dry pressing mold according to claim 1, characterized in that: The push plate (16) has a first limiting protrusion at the bottom, and the first limiting protrusion is slidably connected to the lifting rod (15). The limiting sleeve (13) has a second limiting protrusion on its inner side, and the second limiting protrusion is slidably connected to the lifting rod (15).

7. A powder metallurgy dry pressing mold according to claim 2, characterized in that: The threaded rod (172) has a cross-shaped limiting groove on its inner side, and the cross-shaped limiting groove is slidably connected to an inclined turntable. A sliding buckle is provided on one side of the inclined turntable, and the sliding buckle is connected to the bottom of the connecting frame (2). The sliding buckle is provided with an inclined protrusion, and the inclined protrusion fits against the inclined turntable.

8. A powder metallurgy dry pressing mold according to claim 2, characterized in that: There are two sets of support rods (175), and both sets of support rods (175) are slidably connected to the mold frame (7).

9. A powder metallurgy dry pressing mold according to claim 3, characterized in that: The partition (181) is provided with a spring buckle on the inner side, and the protruding part of the spring buckle is in contact with the collection frame (182).

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