Die casting mold facilitating cleaning and maintenance

Abstract

This utility model discloses a die-casting mold that is easy to clean and maintain, belonging to the field of die-casting technology. It includes a platform, an outer mold, an upper punch, and a lower punch assembly. A bracket is fixedly installed on the upper surface of the platform, the upper punch is fixedly installed at the output end of the pressure mechanism, a support box is fixedly installed on the lower surface of the platform, and the lower punch assembly is assembled in the support box. A positioning cylinder is fixedly installed on the upper surface of the platform, and the outer mold is assembled in the positioning cylinder. This utility model designs a lower punch assembly that achieves a self-knocking cleaning effect on the working surface of the workpiece after the lower punch ejects it. The downward movement of the lower punch during pressing is used to store energy in the spring, and the energy is automatically released through mechanical transmission at the end of the ejection stroke, driving the knocking block to strike the lower punch, thereby shaking off the powder. No manual intervention is required, which significantly improves the cleaning efficiency and ensures production continuity. Furthermore, the outer mold, upper punch, and lower punch are easy to load, unload, and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of die casting technology, and specifically provides a die casting mold that is easy to clean and maintain. Background Technology

[0002] In dry powder pressing processes (such as powder metallurgy and ceramic product pressing), die-casting equipment is typically used and fixedly installed on the production line. During long-term operation of such equipment, the working surface of the mold, especially the punch (a core component of the forming process), is prone to adhering with pressed material powder, leading to instability in the size and weight of the subsequent pressed blanks. In reality, cleaning this adhering powder largely relies on manual operation after machine shutdown, a cumbersome and inefficient process that severely impacts the continuous operation efficiency and capacity of stationary production equipment. Furthermore, when critical mold components (such as the punch) require repair or replacement due to wear or damage, traditional mold structures often result in inconvenient disassembly and assembly, long maintenance cycles, and further increase unplanned downtime. Therefore, the industry urgently needs a die-casting mold structure that can achieve rapid automatic cleaning and is easy to disassemble and maintain, to meet the requirements of high reliability, high utilization, and ease of maintenance for stationary production equipment. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a die-casting mold that is easy to clean and maintain.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a die-casting mold that is easy to clean and maintain, comprising a platform, an outer mold, an upper punch and a lower punch assembly, wherein a bracket is fixedly installed on the upper surface of the platform, and a pressure mechanism is fixedly installed on the upper end of the bracket, the upper punch is fixedly installed at the output end of the pressure mechanism, a support box is fixedly installed on the lower surface of the platform, and the lower punch assembly is assembled in the support box, and a positioning cylinder is fixedly installed on the upper surface of the platform, and the outer mold is assembled in the positioning cylinder;

[0005] The lower punch assembly includes a lower punch and a base plate. The base plate is assembled inside a support box. A spring is fixedly installed on the upper surface of the base plate. An annular plate is fixedly installed on the upper end of the spring. Striking blocks are uniformly fixedly installed on the upper surface of the annular plate. A telescopic transmission structure is assembled on the lower side wall of the lower punch. A limit block is horizontally mounted on the lower end of the telescopic transmission structure, and the inner end of the limit block is located within the outer ring of the annular plate. A fixed cylinder is vertically fixedly installed on the upper surface of the base plate. A movable support rod is movably mounted inside the fixed cylinder. A deflection transmission rod is movably mounted between the movable support rod and the limit block.

[0006] Furthermore, the lower surface of the support box is equipped with an ejection mechanism, and a circular through hole is opened in the middle of the bottom plate. The output end of the ejection mechanism passes through the circular through hole and is located inside the support box. The diameter of the circular through hole and the inner diameter of the annular plate are both larger than the diameter of the output end of the ejection mechanism.

[0007] Furthermore, the upper surface of the platform 1 is equipped with an air blowing mechanism, and the air outlet of the air blowing mechanism faces the upper end face of the outer mold.

[0008] Furthermore, the lower surface of the punch is integrally formed with a frustum block, and the frustum block is located above the striking block.

[0009] Furthermore, the telescopic transmission structure includes an outer sleeve and a telescopic rod, with the telescopic rod being movably assembled inside the outer sleeve. The upper side wall of the telescopic rod is integrally formed with a transmission rod, and the side wall of the frustum block is provided with an annular groove, into which the transmission rod is inserted.

[0010] Furthermore, the upper end of the telescopic rod is integrally formed with a pad.

[0011] Furthermore, the lower end of the outer sleeve is integrally formed with a T-shaped slider, and the outer end face of the limiting block is provided with a T-shaped groove, and the T-shaped slider is movably assembled in the T-shaped groove.

[0012] Furthermore, the upper inner end of the limiting block is provided with a first rounded corner, and the outer ring of the lower surface of the annular plate is provided with a second rounded corner, and the second rounded corner and the first rounded corner are located on the same vertical cylindrical surface.

[0013] Furthermore, one end of the deflection transmission rod is rotatably mounted on the side wall of the movable support rod, and a sliding groove is provided on the inner side of the deflection transmission rod. A slider is fixedly installed on the side wall of the limiting block, and the slider is movably mounted in the sliding groove. One end of an elastic rope is fixedly installed in the sliding groove near the end of the limiting block, and the other end of the elastic rope is fixedly installed on the slider.

[0014] The beneficial effects of using this utility model are:

[0015] This invention designs a lower punch assembly that achieves a self-tapping cleaning effect on the powder adhering to the working surface of the workpiece after the lower punch ejects it. It utilizes the downward movement of the lower punch during pressing to store energy in the spring, and automatically releases the energy through mechanical transmission at the end of the ejection stroke, driving the striking block to strike the lower punch, thereby shaking off the powder. No manual intervention is required, which significantly improves the cleaning efficiency and ensures production continuity.

[0016] This invention enables the rapid disassembly and replacement of core mold components through the detachable connection between the upper punch and the output end of the pressure mechanism, the assembly structure of the outer mold and the positioning cylinder, and the assemblable design of the entire lower punch assembly and the support box. This facilitates timely and convenient disassembly and repair in case of damage, significantly shortens equipment downtime, and improves equipment utilization and maintenance convenience.

[0017] This invention utilizes a spring-driven, ring-plate-driven energy-storing and releasing structure for the striking block, combined with an air-blowing mechanism, to achieve a controllable, effective, and non-damaging cleaning effect. The striking force provided by the spring is moderate and controllable, effectively loosening the powder while avoiding excessive impact damage to the lower punch. Subsequently, the airflow from the air-blowing mechanism can completely blow the dispersed powder away from the working surface, thus ensuring the cleanliness of the lower punch working surface and the consistency of the blank forming quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0019] Figure 2 This is the front sectional view of the present invention.

[0020] Figure 3 This utility model Figure 2 A magnified view of part a in the middle.

[0021] Figure 4 This is a three-dimensional schematic diagram of the lower punch assembly of this utility model.

[0022] Figure 5 This is one of the three-dimensional schematic diagrams of the telescopic transmission structure of this utility model.

[0023] Figure 6 This is the second three-dimensional schematic diagram of the telescopic transmission structure of this utility model.

[0024] The reference numerals in the attached drawings include: 1. Platform, 11. Positioning cylinder, 12. Support box, 13. Ejection mechanism, 14. Air blowing mechanism, 2. Pressure mechanism, 3. Outer mold, 4. Upper punch, 5. Lower punch assembly, 51. Lower punch, 511. Annular groove, 52. Base plate, 521. Fixed cylinder, 53. Spring, 54. Annular plate, 541. Striking block, 55. Telescopic transmission structure, 551. Outer sleeve, 552. T-shaped slider, 553. Telescopic rod, 554. Transmission rod, 555. Pad, 56. Limiting block, 561. T-shaped slide, 57. Movable support rod, 58. Deflection transmission rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1 to 6 A die-casting mold that is easy to clean and maintain includes a platform 1, an outer mold 3, an upper punch 4, and a lower punch assembly 5. A bracket is fixedly installed on the upper surface of the platform 1, and a pressure mechanism 2 is fixedly installed at the upper end of the bracket. The upper punch 4 is fixedly installed at the output end of the pressure mechanism 2. A support box 12 is fixedly installed on the lower surface of the platform 1, and the lower punch assembly 5 is assembled inside the support box 12. A positioning cylinder 11 is fixedly installed on the upper surface of the platform 1, and the outer mold 3 is assembled inside the positioning cylinder 11.

[0027] The positioning cylinder 11 limits and fixes the outer mold 3. The platform surface has a round hole with a diameter smaller than the inner diameter of the outer mold 3, so it can support the outer mold 3. The lower punch 51 of the lower punch assembly 5 is located inside the outer mold 3, and the upper punch 4 is located above the outer mold 3. The diameters of the lower punch 51 and the upper punch 4 are the same as the inner diameter of the outer mold. During operation, dry powder is first added into the outer mold 3, and then the pressure mechanism 2 drives the upper punch 4 to move down and cooperate with the outer mold 3 and the lower punch 51 to complete the stamping.

[0028] The lower surface of the upper punch 4 and the upper surface of the lower punch 51 can be configured with different cavities as needed to complete die casting of different shapes.

[0029] The upper punch 4 can be installed at the output end of the pressure mechanism 2 by screw connection, which is convenient for installation and removal, and convenient for maintenance when it is damaged.

[0030] The upper end of the inner wall of the outer mold 3 is provided with an angle to facilitate the entry of the upper punch 4.

[0031] like Figures 2 to 6As shown, the lower punch assembly 5 includes a lower punch 51 and a base plate 52. The base plate 52 is assembled inside the support box 12. A spring 53 is fixedly installed on the upper surface of the base plate 52. An annular plate 54 is fixedly installed on the upper end of the spring 53. A striking block 541 is uniformly fixedly installed on the upper surface of the annular plate 54. A telescopic transmission structure 55 is assembled on the lower side of the side wall of the lower punch 51. A limit block 56 is horizontally mounted on the lower end of the telescopic transmission structure 55, and the inner end of the limit block 56 is located within the outer ring of the annular plate 54. A fixed cylinder 521 is vertically fixedly installed on the upper surface of the base plate 52. A movable support rod 57 is movably mounted inside the fixed cylinder 521. A deflection transmission rod 58 is movably mounted between the movable support rod 57 and the limit block 56.

[0032] according to Figure 2 It is known that a threaded hole is provided on the side wall of the support box 12, and a limit bolt is screwed into the threaded hole. After the lower punch assembly 5 is placed into the support box 12, the limit bolt is installed to limit the position of the base plate 52. The support box 12 is fixedly installed on the lower surface of the platform by bolts. By removing the bolts and the limit bolts, the lower punch assembly 5 can be easily installed and removed, and it is convenient to maintain it.

[0033] Initially, the lower punch 51 is supported by the spring 53, the annular plate 54 and the striking block 541, so that the lower punch 51 is located inside the outer mold 3. At this time, the movable support rod 57 is in the extended state inside the fixed cylinder 521, and the telescopic transmission structure 55 is in the extended state.

[0034] During the die-casting process, as the upper punch 4 moves downward, it pushes the lower punch 51 downward a certain distance. Since the diameter of the lower punch 51 is larger than the diameter of the circular hole, the final position of the lower punch 51 is where its lower surface is in contact with the surface of the platform 1. The platform 1 supports the lower punch 51 to ensure the smooth completion of the die-casting process. At this time, the telescopic transmission structure 55 is in a compressed and shortest state, and all the movable support rods 57 are located inside the fixed cylinder 521. During this process, the annular plate 54 will move below the limiting block 56 (details will be provided later).

[0035] Specifically, such as Figure 2 As shown, the lower surface of the support box 12 is equipped with an ejector mechanism 13, and a circular through hole is opened in the middle of the bottom plate 52. The output end of the ejector mechanism 13 passes through the circular through hole and is located inside the support box 12. The diameter of the circular through hole and the inner diameter of the annular plate 54 are both larger than the diameter of the output end of the ejector mechanism 13.

[0036] After the die casting is completed, the upper punch 4 is moved upward by the pressure mechanism 2, and then the lower punch 51 is moved upward by the ejection mechanism 13 to move the workpiece out of the outer mold 3 until the workpiece is completely exposed outside the outer mold 3. Then the workpiece can be removed for subsequent processes.

[0037] Specifically, such as Figure 1 As shown, the upper surface of the platform 1 is equipped with an air blowing mechanism 14, and the air outlet of the air blowing mechanism 14 faces the upper end face of the outer mold 3.

[0038] After the workpiece is removed, the ejector mechanism 13 continues to eject the lower punch 51 a certain distance. At this time, the striking block 541 can strike the lower punch 51 (details to follow), causing the dry powder adhering to the surface of the lower punch 51 to detach. Then, the air blowing mechanism 14 is activated to complete the cleaning work on the surface of the lower punch 51, effectively removing the powder adhering to the working surface of the lower punch 51.

[0039] Other cleaning structures can also be installed on this equipment for cleaning the outer mold 3 and the upper punch 4.

[0040] Specifically, such as Figures 2 to 6 As shown, a frustum block is integrally formed on the lower surface of the lower punch 51, and the frustum block is located above the striking block 541. The telescopic transmission structure 55 includes an outer sleeve 551 and a telescopic rod 553, and the telescopic rod 553 is movably assembled inside the outer sleeve 551. A transmission rod 554 is integrally formed on the upper side wall of the telescopic rod 553. An annular groove 511 is opened on the side wall of the frustum block, and the transmission rod 554 is inserted into the annular groove 511. A pad 555 is integrally formed on the upper end of the telescopic rod 553.

[0041] The telescopic rod 553 can move inside the outer sleeve 551. When the punch 51 is subjected to force and moves down or up, the telescopic rod 553 can be moved through the transmission rod 554. When the punch 51 is in contact with the surface of the platform 1, the lower end of the telescopic rod 553 is in contact with the lower surface of the inner cavity of the outer sleeve 551.

[0042] Specifically, such as Figure 5 and Figure 6 As shown, a T-shaped slider 552 is integrally formed at the lower end of the outer sleeve 551, and a T-shaped groove 561 is provided on the outer end face of the limiting block 56, and the T-shaped slider 552 is movably assembled in the T-shaped groove 561.

[0043] Since the transmission rod 554 is horizontally inserted into the annular groove 511, it can be ensured that the telescopic rod 553 and the outer sleeve 551 are vertical. Therefore, through the cooperation of the T-shaped slider 552 and the T-shaped groove 561, it can be ensured that the limit block 56 moves in the horizontal direction.

[0044] Specifically, such as Figure 3 As shown, the upper inner end of the limiting block 56 is provided with a first rounded corner, and the outer ring of the lower surface of the annular plate 54 is provided with a second rounded corner, and the second rounded corner and the first rounded corner are located on the same vertical cylindrical surface.

[0045] Specifically, such as Figures 3 to 6As shown, one end of the deflection transmission rod 58 is rotatably mounted on the side wall of the movable support rod 57. A groove is provided on the inner side of the deflection transmission rod 58. A slider is fixedly installed on the side wall of the limiting block 56, and the slider is movably mounted in the groove. One end of an elastic rope is fixedly installed in the groove near the end of the limiting block, and the other end of the elastic rope is fixedly installed on the slider.

[0046] In the initial state, the deflection transmission rod 58 is set at a 45° tilt angle, and the elastic rope is always in a stretched state.

[0047] During the die-casting process, as the lower punch 51 moves downward, it drives the annular plate 54 downward, causing the second rounded corner to contact the first rounded corner. At this time, two stages of movement occur. The first stage involves the pressure of the annular plate 54 on the limiting block 56. After transmission, the movable support rod 57 moves into the fixed cylinder 521. When the lower end of the movable support rod 57 is in contact with the lower surface of the inner cavity of the fixed cylinder 521, the second stage of movement occurs. The pressure of the annular plate 54 on the limiting block 56 pushes the limiting block 56 to move outward. At this time, the horizontal movement of the slider drives the deflection transmission rod 58 to deflect, while stretching the elastic rope. Then, the annular plate 54 moves below the limiting block 56. During this process, the deflection transmission rod 58 is always in an inclined state. Afterward, the elastic rope resets and pulls the slider, thereby driving the limiting block 56 to move inward to complete the reset. Since the upper surface of the annular plate 54 and the lower surface of the limiting block 56 are both horizontal and staggered, the limiting block 56 can limit the annular plate 54.

[0048] During the demolding process, under the elastic force of spring 53, as the lower punch 51 moves upward, the annular plate 54 pushes the limiting block 56 upward. Therefore, in the initial stage, the movable support rod 57 moves out of the fixed cylinder 521 until it reaches its highest position within the fixed cylinder 521. At this time, spring 53 is still in a compressed state, and the annular plate 54 applies an upward force to the limiting block 56. There is no horizontal component force, so the limiting block 56 will not move horizontally. Afterward, the lower punch 51 continues to move upward, which will drive the telescopic rod 553 out of the outer sleeve 521. The workpiece moves out of the inner sleeve 51 until it reaches the highest position inside the outer sleeve 551; then the telescopic transmission structure 55 drives the limiting block 56 to move upward. This process occurs after the workpiece is removed. As the limiting block 56 moves upward, the deflection transmission rod 58 will deflect, which will drive the limiting block 56 to move horizontally outward and ultimately not limit the annular plate 54. The annular plate 54 moves upward under the action of the spring 53 and finally causes the striking block 541 to strike the lower end of the lower punch 51, dispersing the adhering powder on the working surface of the lower punch 51 through vibration.

[0049] During the demolding process, when the limiting block 56 no longer restricts the annular plate 54, the spring 53 can reach a balanced state. When the spring 53 is in a balanced state, the striking block 541 will not contact the lower punch 51. During the process of the spring 53 pushing the annular plate 54, the elastic potential energy is converted into kinetic energy. When the spring 53 reaches the length of the balanced state, it will continue to move upward a certain distance. In this process, the striking block 541 strikes the lower punch 51, so that the striking force is not too large and will not damage the lower punch 51.

[0050] The elastic force of spring 53 is used to push the annular plate 54 to move, but it is insufficient to push the lower punch 51 to move. The movement of the lower punch 51 is achieved by the pressure during the die casting process and the ejection mechanism 13.

[0051] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of this utility model. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this utility model.

Claims

1. A die-casting mold that is easy to clean and maintain, characterized in that: The device includes a platform, an outer mold, an upper punch, and a lower punch assembly. A bracket is fixedly installed on the upper surface of the platform, and a pressure mechanism is fixedly installed on the upper end of the bracket. The upper punch is fixedly installed at the output end of the pressure mechanism. A support box is fixedly installed on the lower surface of the platform, and the lower punch assembly is assembled inside the support box. A positioning cylinder is fixedly installed on the upper surface of the platform, and the outer mold is assembled inside the positioning cylinder. The lower punch assembly includes a lower punch and a base plate. The base plate is assembled inside a support box. A spring is fixedly installed on the upper surface of the base plate. An annular plate is fixedly installed on the upper end of the spring. Striking blocks are uniformly fixedly installed on the upper surface of the annular plate. A telescopic transmission structure is assembled on the lower side wall of the lower punch. A limit block is horizontally mounted on the lower end of the telescopic transmission structure, and the inner end of the limit block is located within the outer ring of the annular plate. A fixed cylinder is vertically fixedly installed on the upper surface of the base plate. A movable support rod is movably mounted inside the fixed cylinder. A deflection transmission rod is movably mounted between the movable support rod and the limit block.

2. The die-casting mold for easy cleaning and maintenance as described in claim 1, characterized in that: The lower surface of the support box is equipped with an ejection mechanism. A circular through hole is opened in the middle of the bottom plate, and the output end of the ejection mechanism passes through the circular through hole and is located inside the support box. The diameter of the circular through hole and the inner diameter of the annular plate are both larger than the diameter of the output end of the ejection mechanism.

3. The die-casting mold for easy cleaning and maintenance as described in claim 1, characterized in that: The upper surface of the platform (1) is equipped with an air blowing mechanism, and the air outlet of the air blowing mechanism faces the upper end face of the outer mold.

4. The die-casting mold for easy cleaning and maintenance according to claim 1, characterized in that: The lower surface of the punch is integrally formed with a frustum block, and the frustum block is located above the striking block.

5. A die-casting mold that is easy to clean and maintain according to claim 4, characterized in that: The telescopic transmission structure includes an outer sleeve and a telescopic rod, with the telescopic rod being movably assembled inside the outer sleeve. The upper side wall of the telescopic rod is integrally formed with a transmission rod, and the side wall of the frustum block is provided with an annular groove, into which the transmission rod is inserted.

6. A die-casting mold that is easy to clean and maintain according to claim 5, characterized in that: The upper end of the telescopic rod is integrally formed with a pad.

7. A die-casting mold that is easy to clean and maintain according to claim 5, characterized in that: The lower end of the outer sleeve is integrally formed with a T-shaped slider, and the outer end face of the limiting block is provided with a T-shaped groove, and the T-shaped slider is movably assembled in the T-shaped groove.

8. A die-casting mold that is easy to clean and maintain according to claim 7, characterized in that: The upper inner end of the limiting block is provided with a first rounded corner, and the outer ring of the lower surface of the annular plate is provided with a second rounded corner, and the second rounded corner and the first rounded corner are located on the same vertical cylindrical surface.

9. A die-casting mold that is easy to clean and maintain according to claim 8, characterized in that: One end of the deflection transmission rod is rotatably mounted on the side wall of the movable support rod. A groove is provided on the inner side of the deflection transmission rod. A slider is fixedly installed on the side wall of the limiting block, and the slider is movably mounted in the groove. One end of an elastic rope is fixedly installed in the groove near the limiting block, and the other end of the elastic rope is fixedly installed on the slider.

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