Metal powder injection molding mold for a bearing seat of a washing machine

Abstract

The utility model discloses a kind of metal powder injection molding mould for washing machine bearing seat, it is related to metal powder injection molding mould technical field, including bottom plate, limit slot, support frame, drive motor drives screw rod to drive limit sliding block to slide in support frame inboard surface, realize with the movement of arch-shaped limit frame in the arch-shaped mould outer wall by using support rod, to move the powder that is scraped to arch-shaped mould by guiding in the inboard surface of feed groove using elastic guide block, moving block is moved in the linear movement in slot by screw rod, to the limit effect of arch-shaped limit frame, movable shaft provides movable rotating force for connecting plate, movable sleeve rotates in movable rod outer wall rotation work following the rotation of connecting plate, realize swing rod swing following movable sleeve, when it swings, knock ball and reinforced cylinder outer wall contact, realize to arch-shaped mould is knocked vibration, the powder in arch-shaped mould is vibrated, make its internal excess gas discharge through feed groove.

Description

Technical Field

[0001] This utility model relates to the field of metal powder injection molding die technology, and in particular to a metal powder injection molding die for a washing machine bearing housing. Background Technology

[0002] Metal powder injection molding (MIM) technology, a key near-net-shape forming technology in modern manufacturing, combines the advantages of traditional powder metallurgy and plastic injection molding. It is particularly suitable for producing small metal parts with complex shapes, high precision requirements, and excellent performance. In household appliances such as washing machines, core components like bearing housings have stringent requirements for structural strength, dimensional accuracy, and durability; therefore, manufacturing using MIM technology has become a mainstream trend in the industry.

[0003] A patent with publication number CN218168724U discloses an anti-deviation metal powder injection molding die. This die includes a mounting plate, a rectangular block, a rotating shaft, a first screw, a second screw, a clamping block, a lower die, a guide post, an upper die, a mounting ear, a nut, a first piston cylinder, a first piston rod, a second piston cylinder, a second piston rod, a positioning plate, an oil pipe, a rectangular plate, a cylindrical rod, an arc-shaped block, and screws. When the rotating shaft rotates, both the first and second screws rotate. Since the threads of the first and second screws have opposite directions, they are threadedly connected to the first screw and the second piston rod. The two clamping blocks on the twin screw can move closer or further apart synchronously, thus clamping the lower die and fixing it to the mounting plate. When the upper die moves closer to the lower die, the first piston rod slides into the first piston cylinder. At this time, the hydraulic oil in the first piston cylinder enters the second piston cylinder through the oil pipe, and the second piston rod in the second piston cylinder is pushed out. The positioning plate, which is fixedly connected to the second piston rod, can clamp the upper and lower dies together, preventing relative displacement between them. However, the following problems still exist in this patent: When metal powder is injected into the mold cavity, due to flow limitations and the complex geometry of the cavity (such as an arched structure), the feed material easily accumulates in corners, sidewalls, or deep cavities, forming "dead zones." Air or volatile gases in these areas cannot be effectively expelled, eventually leading to defects such as porosity and looseness inside the product, severely affecting the mechanical strength and fatigue life of the bearing housing. After each injection molding, some metal powder inevitably remains on the inner wall of the mold's feed channels (such as feed grooves and runners). If these residues are not cleaned promptly, they will mix into the new material during the next injection, affecting the uniformity of the feed and even causing product contamination; if they solidify and harden, they will block the channels, leading to production interruptions. Traditional manual cleaning methods are inefficient, labor-intensive, and difficult to guarantee thorough cleaning, resulting in the waste of expensive metal powder raw materials.

[0004] To address the above issues, it is necessary to design a metal powder injection molding die for washing machine bearing housings, thereby overcoming these problems. Utility Model Content

[0005] The main objective of this invention is to provide a metal powder injection molding die for a washing machine bearing housing, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A metal powder injection molding die for a washing machine bearing housing includes a base plate, a limiting groove, and a support frame. A drive motor is mounted at one end of the support frame, and a lead screw is connected to the output end of the drive motor. The lead screw passes through the inner side of the support frame and connects to a limiting slider. A support rod is connected to the bottom of the limiting slider, and a reinforcing cylinder is installed at the bottom of the support rod. An arched limiting frame is installed at the bottom of the reinforcing cylinder. Movable blocks are installed at both ends of the inner side of the arched limiting frame. An arched mold is connected to the end of the movable block away from the arched limiting frame. An elastic guide block is installed in the middle of the bottom of the arched limiting frame. A feeding groove is formed at the top of the arched mold, and slots are formed at both ends of the arched mold.

[0007] As a preferred embodiment of this utility model, a limiting plate is fixedly sleeved on the middle of the outer wall of the support rod. A movable shaft is connected to one end of the top of the limiting plate. A connecting plate is sleeved on the outer wall of the movable shaft. A supporting moving rod is connected to the bottom end of the connecting plate away from the movable shaft. A limiting block is installed at the bottom of the supporting moving rod. A locking rod is installed in the middle of the top of the connecting plate. The bottom of the locking rod passes through the bottom of the connecting plate and is connected to a limiting cylinder. A movable rod is connected to the inner side of the limiting cylinder. A movable sleeve is sleeved on the outer wall of the movable rod. A swing rod is installed at the bottom of the movable sleeve. A striking ball is installed at the bottom of the swing rod. A moving groove is opened on the outer wall of the limiting cylinder.

[0008] In a preferred embodiment of this utility model, the drive motor is connected to the lead screw, the lead screw is threadedly fixed to the limiting slider, and the limiting slider is threadedly fixed to the support rod.

[0009] As a preferred embodiment of this utility model, the support rod is rotatably connected to the reinforcing cylinder, the reinforcing cylinder is fixedly connected to the arched limiting frame, the arched limiting frame is fixedly connected to the two moving blocks, and the arched limiting frame is fixedly connected to the elastic guide block.

[0010] In a preferred embodiment of this utility model, the movable block is slidably connected to the inner side of the slot, the outer wall of the elastic guide block is in contact with the inner side of the feed groove, and the inner side of the arched limiting frame is in contact with the outer wall of the arched mold.

[0011] In a preferred embodiment of this utility model, the limiting plates are all rotatably connected to the connecting plate via the movable shaft, and the connecting plate is threadedly fixedly connected to the supporting moving rod.

[0012] In a preferred embodiment of this utility model, the supporting moving rod is rotatably connected to the limiting block, the limiting block is slidably connected to the inner side of the limiting groove, and the connecting plate is rotatably connected to the locking rod.

[0013] As a preferred embodiment of this utility model, the locking rod passes through the bottom of the connecting plate and is rotatably connected to the limiting cylinder, and the limiting cylinder is threadedly fixedly connected to the movable rod.

[0014] As a preferred embodiment of this utility model, the movable sleeve is movably fitted onto the outer wall of the movable rod, the movable sleeve is rotatably connected to the swing rod, and the swing rod is fixedly connected to the striking ball.

[0015] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: This metal powder injection molding die for washing machine bearing housing uses a drive motor to drive a lead screw, which in turn drives a limiting slider to slide on the inner side of a support frame. This allows the support rod to move an arched limiting frame on the outer wall of the arched die. An elastic guide block then guides and scrapes residual powder from the inner side of the feed trough into the arched die. A movable block moves linearly within the slot via the lead screw, limiting the arched limiting frame. A movable shaft provides rotational force to the connecting plate. A support moving rod supports the connecting plate and the limiting cylinder. A movable sleeve rotates along with the connecting plate on the outer wall of the movable rod, allowing a swinging rod to swing with the movable sleeve. During this swing, a striking ball contacts the outer wall of the reinforcing cylinder, vibrating the arched die and causing the powder inside to vibrate, allowing excess gas to be discharged through the feed trough. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lead screw installation structure of this utility model; Figure 3 This is a schematic diagram of the installation structure of the arched limiting frame of this utility model; Figure 4 This is a schematic diagram of the installation structure of the elastic guide block of this utility model; Figure 5 This is a schematic diagram of structure A of this utility model; Figure 6 This is a schematic diagram of the striking ball installation structure of this utility model.

[0017] In the diagram: 1. Base plate; 2. Limiting groove; 3. Support frame; 4. Drive motor; 5. Lead screw; 6. Limiting slider; 7. Support rod; 8. Reinforcing cylinder; 9. Arched limiting frame; 10. Moving block; 11. Arched mold; 12. Limiting plate; 13. Movable shaft; 14. Connecting plate; 15. Support moving rod; 16. Limiting block; 17. Feed groove; 18. Slot; 19. Elastic guide block; 20. Locking rod; 21. Limiting cylinder; 22. Moving groove; 23. Movable rod; 24. Movable sleeve; 25. Swinging rod; 26. Striking ball. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figures 1-6 As shown, a metal powder injection molding die for a washing machine bearing housing includes a base plate 1, a limiting groove 2, and a support frame 3. A drive motor 4 is provided at one end of the support frame 3, and a lead screw 5 is connected to the output end of the drive motor 4. The lead screw 5 passes through the inner side of the support frame 3 and is connected to a limiting slider 6. A support rod 7 is connected to the bottom of the limiting slider 6, and a reinforcing cylinder 8 is installed at the bottom of the support rod 7. An arched limiting frame 9 is installed at the bottom of the reinforcing cylinder 8. Movable blocks 10 are installed at both ends of the inner side of the arched limiting frame 9. An arched mold 11 is connected to the end of the movable block 10 away from the arched limiting frame 9. An elastic guide block 19 is installed in the middle of the bottom of the arched limiting frame 9. A feeding groove 17 is opened at the top of the arched mold 11, and slots 18 are opened at both ends of the arched mold 11. The drive motor 4 is connected to the lead screw 5, the lead screw 5 is threadedly fixed to the limit slider 6, the limit slider 6 is threadedly fixed to the support rod 7; the support rod 7 is rotatably connected to the reinforcing cylinder 8, the reinforcing cylinder 8 is fixedly connected to the arched limit frame 9, the arched limit frame 9 is fixedly connected to two moving blocks 10, and the arched limit frame 9 is fixedly connected to the elastic guide block 19; the moving block 10 is slidably connected to the inner side of the slot 18, the outer wall of the elastic guide block 19 contacts the inner side of the feed groove 17, and the inner side of the arched limit frame 9 contacts the outer wall of the arched mold 11; Specifically, in this embodiment, a limiting slider 6 is provided on the inner side of the support frame 3, which is threadedly engaged with the lead screw 5. The upper and lower end faces of the limiting slider 6 are slidably connected to the grooves on the inner wall of the support frame 3, thereby restricting the rotation of the limiting slider 6, so that it can only make linear reciprocating motion along its axis under the drive of the lead screw 5. A vertically downward extending support rod 7 is fixedly connected to the bottom of the limiting slider 6 by means of threaded connection or welding. The lower end of the support rod 7 passes through the bottom opening of the support frame 3 and is connected to the subsequent actuator. The lower end of the support rod 7 is connected to the top center of a reinforcing cylinder 8 through a rotating bearing, so that when the support rod 7 drives the reinforcing cylinder 8 to move horizontally, the reinforcing cylinder 8 itself can rotate slightly to adapt to slight differences in the axis and reduce wear. An arched limiting frame 9 is fixedly installed at the bottom of the reinforcing cylinder 8. The shape of the arched limiting frame 9 matches the outer contour of the arched mold 11 below and slides in contact with it. At both ends of the inner side of the arched limiting frame 9, two moving blocks 10 are symmetrically fixed. These two moving blocks 10 are respectively embedded in the slots 18 opened at the top ends of the arched mold 11 and can slide freely in the slots 18. The cooperation between the moving blocks 10 and the slots 18 provides precise guidance and limitation for the movement of the arched limiting frame 9, ensuring its stable movement trajectory. At the middle position of the bottom of the arched limiting frame 9, an elastic guide block 19 is fixedly installed by bolts or slots. The elastic guide block 19 is preferably made of wear-resistant rubber or polyurethane material. Its top is designed as a scraper shape that matches the curvature of the inner wall of the feed groove 17. When the arched limiting frame 9 moves, the side of the elastic guide block 19 can closely fit the inner side of the feed groove 17 to achieve efficient scraping.

[0020] A limiting plate 12 is fixedly sleeved in the middle of the outer wall of the support rod 7. A movable shaft 13 is connected to one end of the top of the limiting plate 12. A connecting plate 14 is sleeved on the outer wall of the movable shaft 13. A support moving rod 15 is connected to the bottom of the connecting plate 14 away from the movable shaft 13. A limiting block 16 is installed at the bottom of the support moving rod 15. A locking rod 20 is installed in the middle of the top of the connecting plate 14. The bottom of the locking rod 20 passes through the bottom of the connecting plate 14 and is connected to a limiting cylinder 21. A movable rod 23 is connected to the inner side of the limiting cylinder 21. A movable sleeve 24 is sleeved on the outer wall of the movable rod 23. A swing rod 25 is installed at the bottom of the movable sleeve 24. A striking ball 26 is installed at the bottom of the swing rod 25. A moving groove 22 is opened on the outer wall of the limiting cylinder 21. The limiting plates 12 are rotatably connected to the connecting plates 14 via the movable shafts 13. The connecting plates 14 are threadedly fixed to the supporting moving rods 15. The supporting moving rods 15 are rotatably connected to the limiting blocks 16, which are slidably connected to the inner side of the limiting grooves 2. The connecting plates 14 are rotatably connected to the locking rods 20. The locking rods 20 pass through the bottom of the connecting plates 14 and are rotatably connected to the limiting cylinders 21. The limiting cylinders 21 are threadedly fixed to the movable rods 23. The movable sleeves 24 are rotatably fitted onto the outer wall of the movable rods 23. The movable sleeves 24 are rotatably connected to the swing rods 25, which are fixedly connected to the striking balls 26. Specifically, in this embodiment, a limiting plate 12 is fixedly sleeved in the middle of the outer wall of the support rod 7 by welding or keying. One end of the top of the limiting plate 12 is hinged to a connecting plate 14 via a movable shaft 13. The movable shaft 13 serves as the fulcrum for the swing of the connecting plate 14. A vertically downward extending support moving rod 15 is threadedly connected to the bottom end of the connecting plate 14 away from the movable shaft 13. A limiting block 16 is installed at the bottom of the support moving rod 15. The limiting block 16 is placed in the limiting groove 2 opened on the base plate 1 and slides with it. When the connecting plate 14 swings, the support moving rod 15 and the limiting block 16 slide in the limiting groove 2, providing a stable support point and constraint for the connecting plate 14 and ensuring that its swing plane is fixed. In the middle of the top of the connecting plate 14, an adjustable height locking rod 20 is threadedly installed. The bottom of the locking rod 20 passes through the connecting plate 14 and is rotatably connected to the top of a limiting cylinder 21. By rotating the locking rod 20, the vertical position of the limiting cylinder 21 can be finely adjusted, thereby adjusting the initial posture of the subsequent striking mechanism. A movable groove 22 is provided on the outer wall of the limiting cylinder 21, and a horizontally set movable rod 23 is fixedly connected inside it by a thread. A movable sleeve 24 is movably fitted on the movable rod 23 and can rotate and slide freely on it. A swing rod 25 is fixedly connected to the bottom of the movable sleeve 24. The swing rod 25 and the movable sleeve 24 are also hinged, allowing small-angle relative rotation. At the end of the swing rod 25, a striking ball 26 is fixedly installed. The striking ball 26 is preferably made of hard alloy or high-density metal to ensure striking effect and durability.

[0021] It should be noted that this utility model is a metal powder injection molding mold for a washing machine bearing seat. In use, firstly, the entire mold assembly is installed and fixed on the injection molding machine. The upper and lower molds of the arched mold 11 are in a closed state, forming a complete cavity, ready to receive metal powder feed. When the injection molding machine starts feeding metal powder into the cavity of the arched mold 11 through the feed chute 17, the drive motor 4 is started simultaneously. The drive motor 4 begins to work, and its output shaft drives the lead screw 5 to rotate. Since the lead screw 5 and the limiting slider 6 are connected by a thread, the limiting slider 6 is restricted within the support frame 3 and can only move linearly. Therefore, the rotational motion of the lead screw 5 is converted into the linear reciprocating motion of the limiting slider 6. The limiting slider 6 drives the support rod 7, which is fixedly connected to it, to move together. During the movement of the support rod 7, it drives the limiting plate 12, which is fixedly sleeved on its outer wall, to move synchronously. The limiting plate 12 drives one end of the connecting plate 14 through the movable shaft 13, causing the connecting plate 14 to reciprocate at a certain angle around the movable shaft 13. The other end is supported and guided by a supporting moving rod 15 and a limiting block 16. The limiting block 16 slides within the limiting groove 2 of the base plate 1, ensuring the stability and accuracy of the swing of the connecting plate 14. The swing of the connecting plate 14, through the locking rod 20 and the limiting cylinder 21 installed on it, drives the movable rod 23 to swing synchronously in an arc. The movable sleeve 24 is fitted onto the movable rod 23. When the movable rod 23 swings, the movable sleeve 24 rotates and moves on the outer wall of the movable rod 23, and drives the swing rod 25 fixedly connected to it to swing. Similar to the reciprocating swing of a pendulum, the striking ball 26 at the end of the swing rod 25 swings accordingly and periodically strikes the outer wall of the reinforcing cylinder 8. The continuous and regular striking vibration generated by the striking ball 26 on the reinforcing cylinder 8 is efficiently transmitted to the internal arched mold 11 through the reinforcing cylinder 8 and the arched limiting frame 9. This high-frequency micro-vibration can effectively disturb the metal powder being filled in the cavity, enhancing its fluidity. Air bubbles trapped in the powder and air in the corners of the cavity are squeezed upwards and finally discharged smoothly along the feed groove 17. This process greatly reduces defects such as porosity and looseness inside the finished product, ensuring the density and mechanical strength of the bearing seat. Whether the drive motor 4 rotates in the opposite direction or continues to rotate in the original direction depends on the mechanism design. Here, the goal is to achieve the material cleaning action. The drive screw 5 drives the entire auxiliary mechanism to move in the opposite direction. Under the drive of the screw 5, the support rod 7 drives the arched limit frame 9 to slide along the outer wall of the arched mold 11. To ensure the stability of the translation, the moving blocks 10 at both ends of the arched limit frame 9 slide linearly in the corresponding slots 18 of the arched mold 11, which plays a precise guiding and limiting role. During this process, the elastic guide block 19 installed at the bottom center of the arched limit frame 9 scrapes off the metal powder remaining on the inner wall of the feed groove 17 because its outer wall is in close contact with the inner side of the feed groove 17. The scraped powder falls back into the cavity of the arched mold 11 through the gap between the arched limit frame 9 and the arched mold 11 under the action of gravity, or is collected and reused. Compared to the dual locking mechanism of mechanical clamping and hydraulic linkage used in the prior art and common existing technologies, which ensures that the upper and lower molds do not shift relative to each other under high-pressure injection, this is a typical "error-proof" design. Its goal is to avoid external defects such as flash and dimensional deviations caused by equipment vibration or inaccurate mold closing. The core of this technology focuses on solving the deeper "micro-process optimization" problem in MIM process. It does not directly interfere with mold closing accuracy, but actively improves the filling state inside the cavity and the maintenance efficiency of the mold through innovative auxiliary mechanisms. This is an "efficiency-enhancing" design, which aims to improve the internal quality density and strength of the product and achieve automated production. Prior art: It can only guarantee injection within a fixed mold cavity. It is powerless to deal with filling defects such as porosity and looseness caused by feeding flow and gas retention inside the cavity. The improvement of its product yield depends on the stability of mold closing, but it cannot change the filling defects caused by feeding flow and gas retention. This invention addresses internal quality issues caused by uneven filling. It innovatively incorporates a "vibration tapping mechanism," which, during injection, uses a drive motor to activate a tapping ball, providing continuous and regular micro-vibration to the mold. This vibration effectively "activates" the metal powder feed, enhancing its fluidity and helping to expel air bubbles trapped in the powder and trapped gas in the corners of the cavity. The direct benefit is a significant reduction in the porosity of the finished product, improving its density and mechanical properties. This is crucial for high-load, high-precision components like washing machine bearing seats. In contrast, the clamping and hydraulic locking functions in the prior art are relatively independent, requiring separate operation and resulting in a more complex structure. The most innovative highlight of this invention is that it uses only a single drive motor as a power source, employing a sophisticated mechanical linkage mechanism including a lead screw, slider, swing arm, and tapping ball to simultaneously achieve the two core functions of "auxiliary vibration venting" and "automatic scraping and cleaning." This highly integrated design is not only compact and low-cost, but more importantly, it features simple control logic, reliable operation, and avoids the coordination difficulties and failure rates associated with multi-power-source systems.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A metal powder injection molding die for a washing machine bearing housing, comprising a base plate (1), a limiting groove (2), and a support frame (3), characterized in that: One end of the support frame (3) is provided with a drive motor (4), the output end of the drive motor (4) is connected to a lead screw (5), the lead screw (5) passes through the inner side of the support frame (3) and is connected to a limit slider (6), the bottom of the limit slider (6) is connected to a support rod (7), the bottom of the support rod (7) is installed with a reinforcing cylinder (8), the bottom of the reinforcing cylinder (8) is installed with an arched limit frame (9), both ends of the inner side of the arched limit frame (9) are equipped with moving blocks (10), the end of the moving block (10) away from the arched limit frame (9) is connected to an arched mold (11), the middle of the bottom of the arched limit frame (9) is equipped with an elastic guide block (19), the top of the arched mold (11) is provided with a feeding groove (17), and both ends of the arched mold (11) are provided with slots (18).

2. The metal powder injection molding die for a washing machine bearing housing according to claim 1, characterized in that: A limiting plate (12) is fixedly sleeved on the middle of the outer wall of the support rod (7). A movable shaft (13) is connected to one end of the top of the limiting plate (12). A connecting plate (14) is sleeved on the outer wall of the movable shaft (13). A support moving rod (15) is connected to the bottom of the connecting plate (14) away from the movable shaft (13). A limiting block (16) is installed at the bottom of the support moving rod (15). A locking rod (20) is installed in the middle of the top of the connecting plate (14). A limiting cylinder (21) is connected to the bottom of the locking rod (20) through the bottom of the connecting plate (14). A movable rod (23) is connected to the inner side of the limiting cylinder (21). A movable sleeve (24) is sleeved on the outer wall of the movable rod (23). A swing rod (25) is installed at the bottom of the movable sleeve (24). A striking ball (26) is installed at the bottom of the swing rod (25). A moving groove (22) is opened on the outer wall of the limiting cylinder (21).

3. The metal powder injection molding die for a washing machine bearing housing according to claim 1, characterized in that: The drive motor (4) is connected to the lead screw (5) for transmission, the lead screw (5) is threadedly fixed to the limiting slider (6), and the limiting slider (6) is threadedly fixed to the support rod (7).

4. A metal powder injection molding die for a washing machine bearing housing according to claim 1, characterized in that: The support rod (7) is rotatably connected to the reinforcing cylinder (8), the reinforcing cylinder (8) is fixedly connected to the arched limiting frame (9), the arched limiting frame (9) is fixedly connected to the two moving blocks (10), and the arched limiting frame (9) is fixedly connected to the elastic guide block (19).

5. A metal powder injection molding die for a washing machine bearing housing according to claim 1, characterized in that: The moving block (10) is slidably connected to the inner side of the slot (18), the outer wall of the elastic guide block (19) is in contact with the inner side of the feed groove (17), and the inner side of the arched limiting frame (9) is in contact with the outer wall of the arched mold (11).

6. A metal powder injection molding die for a washing machine bearing housing according to claim 2, characterized in that: The limiting plates (12) are rotatably connected to the connecting plates (14) via the movable shaft (13), and the connecting plates (14) are threadedly fixed to the supporting moving rods (15).

7. A metal powder injection molding die for a washing machine bearing housing according to claim 2, characterized in that: The supporting moving rod (15) is rotatably connected to the limiting block (16), the limiting block (16) is slidably connected to the inner side of the limiting groove (2), and the connecting plate (14) is rotatably connected to the locking rod (20).

8. A metal powder injection molding die for a washing machine bearing housing according to claim 2, characterized in that: The locking rod (20) passes through the bottom of the connecting plate (14) and is rotatably connected to the limiting cylinder (21). The limiting cylinder (21) is threadedly fixed to the movable rod (23).

9. A metal powder injection molding die for a washing machine bearing housing according to claim 2, characterized in that: The movable sleeve (24) is movably fitted onto the outer wall of the movable rod (23), the movable sleeve (24) is rotatably connected to the swing rod (25), and the swing rod (25) is fixedly connected to the striking ball (26).

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