MIM part combined mold facilitating core replacement

Abstract

The utility model provides a kind of MIM part combined mould of convenient to change core. Including support, the lower die holder is installed on the support, the support is installed with support, the support top is installed with pneumatic cylinder, the output of pneumatic cylinder is installed with upper die holder, T type plugboard is provided in the lower die holder, and the lower die core is installed on T type plugboard. In the utility model, by setting quick core changing mechanism at upper die holder and lower die holder, the convenient operation that integral mould does not need to be disassembled is realized when mould is replaced, only needs to be quickly disassembled to die holder and die core can be completed replacement, especially suitable for the production scene of multiple varieties parts, can quickly switch product production, substantially shorten the transformation cycle of production line. Meanwhile, this modular mounting structure not only effectively reduces the manufacturing cost of mould, but also significantly reduces the subsequent maintenance cost, has higher practical value.

Description

Technical Field

[0001] This utility model relates to precision molding molds, and in particular to a modular mold for MIM parts that is easy to replace the core, belonging to the field of metal powder injection molding technology. Background Technology

[0002] MIM part molds are precision forming tools tailored for the metal injection molding process chain. Their core function is to transform metal powder-binder feed into a green blank with a smectic structure through cavity constraint and pressure transmission during the injection stage. The mold design also compensates for material changes in subsequent MIM processes (debinding, sintering), ultimately ensuring that the part meets the design dimensions and performance requirements.

[0003] Publication number CN214263897U discloses a MIM injection mold, including an upper mold base and a lower mold base. An injection tube is connected through the top of the upper mold base, and first mounting plates are fixedly connected to both outer walls of the upper mold base. Fixing blocks are fixedly connected to the top of both outer walls of the upper mold base, and connecting blocks are fixedly connected to the bottom of both outer walls of the lower mold base. A first push rod motor is fixedly mounted on the top of each of the two connecting blocks. Second mounting plates are fixedly connected to both outer walls of the lower mold base, and a demolding assembly, including a base plate, is fixedly mounted on the bottom of the lower mold base. This MIM injection mold communicates with the interior of the upper mold base through the injection tube. When the upper and lower mold bases are closed by the first push rod motor, injection is conveniently performed into the mold through the injection tube. After injection molding, the demolding assembly can eject the workpiece from the lower mold base, achieving rapid demolding and improving mold production efficiency.

[0004] However, this type of injection mold lacks a quick-change mechanism, requiring the entire mold to be disassembled and reassembled to meet different production needs. This operation is not only cumbersome but also extends the production line transition cycle and increases manufacturing costs, necessitating improvement.

[0005] To address this, a modular mold for combining MIM parts that facilitates core replacement is proposed. Utility Model Content

[0006] In view of this, the present invention provides a modular mold for MIM parts that facilitates core replacement, in order to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial alternative.

[0007] The technical solution of this utility model is implemented as follows: A modular mold for MIM parts that facilitates core replacement includes a support platform, a lower mold base mounted on the support platform, a bracket mounted on the support platform, a cylinder mounted above the bracket, an upper mold base mounted at the output end of the cylinder, a T-shaped insert plate disposed inside the lower mold base, a lower mold core mounted on the T-shaped insert plate, a fixed rod mounted on the lower mold base, a stop plate rotatably mounted on the fixed rod, a torsion spring sleeved on the fixed rod, an upper mold core disposed inside the upper mold base, a limit groove disposed on the upper mold core, a sliding plate slidably mounted in the limit groove, a magnet embedded in the sliding plate, a retaining cavity disposed on the side of the upper mold base, a cavity plate disposed on the other side of the upper mold base, a tongue-shaped plate slidably mounted inside the cavity plate, a pull rod disposed on the side of the tongue-shaped plate, a spring A sleeved on the pull rod, and an electromagnetic plate embedded in the tongue-shaped plate.

[0008] More preferably, one end of the torsion spring is mounted on a fixed rod, and the other end of the torsion spring is mounted on a stop plate, wherein the torsion spring drives the stop plate to tend to approach the T-shaped insert plate.

[0009] More preferably, one end of the spring A is installed inside the cavity plate, and the other end of the spring A is installed on the side of the tongue plate, and the spring A drives the tongue plate to tend to insert into the limiting groove.

[0010] More preferably, the slide plate is adapted to the card cavity, and the magnet is attracted to the energized electromagnetic plate by a magnetic field.

[0011] More preferably, a handle is installed at one end of the pull rod.

[0012] More preferably, groove blocks are installed on both sides of the upper mold base, a cylindrical seat is installed on the support, a guide rod is installed on the cylindrical seat, the groove blocks are slidably installed on the guide rod, and a spring B is sleeved on the guide rod.

[0013] More preferably, one end of the spring B is installed above the cylinder seat, and the other end of the spring B is installed below the slot block, and the spring B drives the upper mold seat to have a vertical upward tendency.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] I. In this utility model, by setting a quick-change core mechanism at the upper and lower mold bases, convenient operation is achieved during mold replacement without disassembling the entire mold. Replacement can be completed simply by quickly assembling and disassembling the mold base and mold core. This is particularly suitable for production scenarios involving multiple types of parts, enabling rapid product switching and significantly shortening the production line transition cycle. Simultaneously, this modular installation structure not only effectively reduces mold manufacturing costs but also significantly reduces subsequent maintenance costs, demonstrating high practical value.

[0016] Second, by adding a buffer mechanism, the spring B can fully exert its buffering effect, which can effectively avoid the problem of damage caused by excessive pressure when the upper mold core and the lower mold core are in contact, and significantly extend the service life of the mold core.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front structural diagram of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the lower mold core of this utility model;

[0022] Figure 4 In this utility model Figure 3 Enlarged view of part of the structure;

[0023] Figure 5 This is an exploded view of the mounting structure of the upper mold core of this utility model;

[0024] Figure 6 This is a schematic diagram of the tongue-shaped plate of this utility model.

[0025] Reference numerals in the attached drawings: 1. Support; 2. Lower mold base; 3. Bracket; 4. Cylinder; 5. Upper mold base; 6. T-shaped insert plate; 7. Lower mold core; 8. Fixed rod; 9. Support plate; 10. Torsion spring; 11. Magnet; 12. Clamping cavity; 13. Cavity plate; 14. Tongue plate; 15. Pull rod; 16. Spring A; 17. Electromagnetic plate; 18. Cylinder base; 19. Guide rod; 20. Spring B; 21. Groove block; 22. Upper mold core; 23. Limiting groove; 24. Slide plate. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, this utility model embodiment provides a modular mold for MIM parts that facilitates core replacement, including a support 1, a lower mold base 2 mounted on the support 1, a bracket 3 mounted on the support 1, a cylinder 4 mounted above the bracket 3, an upper mold base 5 mounted at the output end of the cylinder 4, a T-shaped insert 6 disposed inside the lower mold base 2, a lower mold core 7 mounted on the T-shaped insert 6, a fixed rod 8 mounted on the lower mold base 2, a stop plate 9 rotatably mounted on the fixed rod 8, and a torsion spring sleeved on the fixed rod 8. 10. An upper mold core 22 is provided inside the upper mold base 5. A limiting groove 23 is provided on the upper mold core 22. A sliding plate 24 is slidably installed in the limiting groove 23. A magnet 11 is embedded in the sliding plate 24. A clamping cavity 12 is provided on the side of the upper mold base 5. A cavity plate 13 is installed on the other side of the upper mold base 5. A tongue plate 14 is slidably installed in the cavity plate 13. A pull rod 15 is installed on the side of the tongue plate 14. A spring A16 is sleeved on the pull rod 15. An electromagnetic plate 17 is embedded in the tongue plate 14.

[0029] In one embodiment, one end of the torsion spring 10 is mounted on the fixed rod 8, and the other end of the torsion spring 10 is mounted on the abutment plate 9. The torsion spring 10 drives the abutment plate 9 to tend to approach the T-shaped insert plate 6. After the abutment plate 9 is released, the abutment plate 9 moves closer to the T-shaped insert plate 6 and abuts against its surface under the elastic force of the torsion spring 10, thereby stably fixing the lower mold core 7 in the lower mold base 2 and preventing it from shifting during subsequent operations.

[0030] In one embodiment, one end of spring A16 is installed inside the cavity plate 13, and the other end of spring A16 is installed on the side of the tongue plate 14. Spring A16 drives the tongue plate 14 to tend to insert into the limiting groove 23. When the position of the tongue plate 14 coincides with that of the slide plate 24, spring A16 resets and pushes the tongue plate 14 to move towards the limiting groove 23 until the tongue plate 14 is inserted into the limiting groove 23.

[0031] In one embodiment, the slide plate 24 is adapted to the cavity 12, and the magnet 11 and the energized electromagnetic plate 17 are attracted by a magnetic field. When the electromagnetic plate 17 is energized, it generates a magnetic field, which attracts the magnet 11 embedded in the slide plate 24. Pulling the lever 15 causes the tongue plate 14 to disengage from the limiting groove 23, and the mutual attraction between the magnet 11 and the electromagnetic plate 17 causes the slide plate 24 to slide back to its original position along the limiting groove 23.

[0032] In one embodiment, a handle is attached to one end of the lever 15. The handle facilitates the pulling action of the lever 15.

[0033] In one embodiment, slotted blocks 21 are installed on both sides of the upper mold base 5, a cylindrical base 18 is installed on the support 1, and a guide rod 19 is installed on the cylindrical base 18. The slotted blocks 21 are slidably mounted on the guide rod 19, and a spring B20 is sleeved on the guide rod 19. Under the buffering effect of the spring B20, the upper mold base 5 and the upper mold core 22 slowly approach the lower mold base 2 and the lower mold core 7 to avoid damage to the mold core due to excessive pressure caused by direct collision. Finally, the upper mold core 22 and the lower mold core 7 fit tightly together to form a complete cavity.

[0034] In one embodiment, one end of spring B20 is mounted above the cylinder seat 18, and the other end of spring B20 is mounted below the slot block 21. Spring B20 drives the upper mold seat 5 to have a vertical upward tendency. When cylinder 4 is activated, it drives the upper mold seat 5 to move downward. The slot blocks 21 on both sides of the upper mold seat 5 slide down synchronously along the guide rod 19. Spring B20 is compressed by the slot blocks 21 and generates an upward elastic force, thereby achieving a buffering effect.

[0035] In operation, this utility model works as follows: When installing the lower mold core 7, first move the abutment plate 9 on the fixed rod 8 so that it no longer abuts against the groove reserved in the lower mold base 2. At this time, the torsion spring 10 will accumulate force. Then, insert the T-shaped insert plate 6 together with the lower mold core 7 into the groove reserved in the lower mold base 2. After releasing the abutment plate 9, the abutment plate 9 moves closer to the T-shaped insert plate 6 under the elastic force of the torsion spring 10 and abuts against its surface, thereby stably fixing the lower mold core 7 in the lower mold base 2 and preventing it from shifting during subsequent work. When installing the upper mold core 22, after placing the upper mold core 22 into the upper mold base 5, it will... First, the tongue plate 14 comes into contact with the plate and is slid along the cavity plate 13 and retracts under the action of the tongue surface and pressure. When the position of the tongue plate 14 coincides with that of the slide plate 24, the spring A16 resets and pushes the tongue plate 14 to move towards the limiting groove 23 until the tongue plate 14 is inserted into the limiting groove 23. During this process, the slide plate 24 is slid along the limiting groove 23 and is locked into the clamping cavity 12. Through the cooperation of the tongue plate 14 and the slide plate 24, the upper mold core 22 is firmly fixed in the upper mold base 5, ensuring that the mold core is installed accurately and stably.

[0036] During mold closing, cylinder 4 activates and drives upper mold base 5 to move downwards. The slot blocks 21 on both sides of upper mold base 5 slide down synchronously along guide rod 19. Spring B20 is compressed by slot blocks 21, generating an upward elastic force. With the buffering effect of spring B20, upper mold base 5 and upper mold core 22 slowly approach lower mold base 2 and lower mold core 7, avoiding excessive pressure due to direct collision that could damage the mold core. Finally, upper mold core 22 and lower mold core 7 fit tightly together to form a complete cavity. Then, metal powder is injected into the cavity through the injection mechanism to complete injection molding. During demolding, cylinder 4 drives upper mold base 5 to move upwards, slot blocks 21 slide upwards along guide rod 19, spring B20 gradually resets and assists upper mold base 5 in rising, and upper mold base 5 gradually separates from lower mold base 2.

[0037] To remove the upper mold core 22, first energize the electromagnetic plate 17. The electromagnetic plate 17 generates a magnetic field, which attracts the magnet 11 embedded in the slide plate 24. Pull the lever 15 to disengage the tongue plate 14 from the limiting groove 23. Under the mutual attraction between the magnet 11 and the electromagnetic plate 17, the slide plate 24 slides back along the limiting groove 23. Then, the upper mold core 22 can be removed from the upper mold base 5. To remove the lower mold core 7, rotate the abutment plate 9 to disengage it from the T-shaped insert plate 6. The torsion spring 10 is twisted, and then the T-shaped insert plate 6 together with the lower mold core 7 can be removed from the lower mold base 2, realizing the quick replacement of the mold core.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A modular mold for MIM parts that facilitates core replacement, characterized in that: The system includes a support (1), a lower mold base (2) mounted on the support (1), a bracket (3) mounted on the support (1), a cylinder (4) mounted above the bracket (3), an upper mold base (5) mounted on the output end of the cylinder (4), a T-shaped insert plate (6) provided inside the lower mold base (2), a lower mold core (7) mounted on the T-shaped insert plate (6), a fixed rod (8) mounted on the lower mold base (2), a stop plate (9) rotatably mounted on the fixed rod (8), a torsion spring (10) sleeved on the fixed rod (8), and an upper mold core provided inside the upper mold base (5). (22) A limiting groove (23) is provided on the upper mold core (22). A sliding plate (24) is slidably installed in the limiting groove (23). A magnet (11) is embedded in the sliding plate (24). A clamping cavity (12) is provided on the side of the upper mold base (5). A cavity plate (13) is installed on the other side of the upper mold base (5). A tongue plate (14) is slidably installed in the cavity plate (13). A pull rod (15) is installed on the side of the tongue plate (14). A spring A (16) is sleeved on the pull rod (15). An electromagnetic plate (17) is embedded in the tongue plate (14).

2. The MIM part assembly mold for easy core replacement according to claim 1, characterized in that: One end of the torsion spring (10) is mounted on the fixed rod (8), and the other end of the torsion spring (10) is mounted on the abutment plate (9). The torsion spring (10) drives the abutment plate (9) to tend to approach the T-shaped insert plate (6).

3. The MIM part assembly mold for easy core replacement according to claim 1, characterized in that: One end of the spring A (16) is installed inside the cavity plate (13), and the other end of the spring A (16) is installed on the side of the tongue plate (14). The spring A (16) drives the tongue plate (14) to tend to insert into the limiting groove (23).

4. A modular mold for MIM parts that facilitates core replacement according to claim 1, characterized in that: The sliding plate (24) is adapted to the card cavity (12), and the magnet (11) and the energized electromagnetic plate (17) are attracted by the magnetic field.

5. A modular mold for MIM parts that facilitates core replacement according to claim 1, characterized in that: A handle is installed at one end of the lever (15).

6. A modular mold for MIM parts that facilitates core replacement according to claim 1, characterized in that: The upper mold base (5) has groove blocks (21) installed on both sides, the support (1) has a cylinder seat (18) installed on it, the cylinder seat (18) has a guide rod (19) installed on it, the groove blocks (21) are slidably installed on the guide rod (19), and a spring B (20) is sleeved on the guide rod (19).

7. A modular mold for MIM parts that facilitates core replacement according to claim 6, characterized in that: One end of the spring B (20) is installed above the cylinder seat (18), and the other end of the spring B (20) is installed below the slot block (21). The spring B (20) drives the upper mold seat (5) to have a vertical upward tendency.

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