Die locking device, die closing mechanism and die casting machine

Abstract

The utility model relates to the technical field of die casting, and discloses a die locking device, a die closing mechanism and a die casting machine, the die locking device is used for locking a movable die on a tiebar, and the die locking device comprises a plurality of annular limiting grooves formed on the tiebar; the bracing frame slidably sleeves the tie bar, and a chute is formed in the bracing frame; the band-type brake block is arranged in the sliding groove in a sliding mode, and a plurality of limiting protrusions opposite to the annular limiting groove are arranged on the inner wall of the band-type brake block; the first driving cylinder is fixedly arranged on the supporting frame, the movable end of the first driving cylinder is connected with the band-type brake block, and the first driving cylinder can drive the band-type brake block to slide so that the limiting protrusion can enter the annular limiting groove. A cylinder body of the mold locking oil cylinder is fixed on the movable mold, and a movable end of the mold locking oil cylinder is connected with the support frame. When the mold locking device is applied to a die-casting machine and a mold closing mechanism, the movable mold can be firmly locked after the mold is closed, and pressure leakage in a mold cavity is avoided, so that long-time high casting pressure is kept, and the casting quality of a large thick-wall structural part is ensured.

Description

Technical Field

[0001] This utility model relates to the field of die casting technology, specifically to a mold locking device, a mold closing mechanism, and a die casting machine. Background Technology

[0002] As molten metal enters the mold cavity and begins filling, maintaining high and stable casting pressure is crucial for ensuring the quality and density of the casting. However, the working mechanism of traditional die-casting machines struggles to meet this requirement in practical applications. Due to the inability to continuously provide high pressure, casting large, thick-walled structural components using conventional die-casting machines often results in inconsistent casting quality, low yield rates, and failure to meet the high standards of industrial production. Especially when castings require prolonged cooling and are thick, die-casting machines often cannot effectively maintain the necessary high-pressure environment, further affecting the density and surface quality of the casting, and potentially leading to structural defects. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a mold locking device, a mold closing mechanism, and a die casting machine incorporating the same. These mechanisms can securely lock the moving mold after the mold is closed, preventing pressure leakage within the mold cavity and thus maintaining high casting pressure for extended periods, thereby ensuring the casting quality of large, thick-walled structural components.

[0004] According to one embodiment of the present invention, a mold-locking device is provided for locking a moving mold onto a tie rod, comprising: a plurality of annular limiting grooves formed on the tie rod; a support frame slidably sleeved on the tie rod, having a sliding groove formed inside; a brake block slidably disposed in the sliding groove, with a plurality of limiting protrusions on its inner wall opposite to the annular limiting grooves; a first drive cylinder fixedly disposed on the support frame, with its movable end connected to the brake block, capable of driving the brake block to slide, causing the limiting protrusions to enter the annular limiting grooves; and a mold-locking cylinder, the cylinder body fixed on the moving mold, with its movable end connected to the support frame.

[0005] In one embodiment, there are at least two brake blocks. When the limiting protrusion enters the annular limiting groove, the brake blocks form an annular structure surrounding the outer periphery of the guide post.

[0006] In one embodiment, the brake block is arc-shaped, and the sliding groove is arranged radially along the guide post.

[0007] In one implementation, the first drive cylinder is a pneumatic cylinder.

[0008] In one embodiment, the cross-section of the annular limiting groove is rectangular or arc-shaped.

[0009] According to one embodiment of the present invention, a mold closing mechanism is provided, comprising: a fixed mold, fixedly disposed on a gatepost; a movable mold, slidably disposed on the gatepost; a second drive cylinder, with its two ends respectively connected to the fixed mold and the movable mold; and a mold locking device as described above.

[0010] According to one embodiment of the present invention, a die-casting machine is provided, comprising: a frame on which four tie rods are provided; a mold closing mechanism as described above, disposed on the frame; and an injection mechanism disposed on the frame, wherein the discharge port is connected to the feed port on the fixed mold.

[0011] In one embodiment, the golem column is vertically mounted on the frame, and the fixed mold and moving mold are horizontally mounted on the frame.

[0012] In one embodiment, a mounting bracket is slidably mounted on the frame, and the injection mechanism is mounted on the mounting bracket.

[0013] As one embodiment, the die-casting machine further includes: a plurality of pressure boosting mechanisms, located at a preset position above the moving mold, capable of applying pressure to the moving mold toward the fixed mold side.

[0014] Based on the above description and practical experience, the mold-locking device and mold-closing mechanism of this invention can firmly lock the moving mold after mold closing, preventing pressure leakage inside the mold cavity and ensuring the continuous stability of high casting pressure during the die-casting process. This is particularly important for large, thick-walled structural parts, effectively improving the quality and density of castings, reducing defects and voids, and thus increasing the pass rate and production efficiency.

[0015] This invention improves the die-casting machine by enhancing the mold-locking device, mold-closing mechanism, and pressure-boosting function. This not only improves the pressure control capability during the die-casting process but also enhances the overall quality, stability, and production efficiency of the castings, making it a promising candidate for broad industrial applications. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the mold-locking device involved in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the mold closing mechanism involved in one embodiment of the present utility model.

[0018] Figure 3 This is a schematic diagram of the structure of a die-casting machine involved in one embodiment of the present invention.

[0019] The attached figures are labeled as follows:

[0020] 41. Fixed mold; 42. Moving mold; 43. Tie pillar; 44. Pressurizing mechanism; 45. Frame; 46. Mounting frame; 47. Injection mechanism; 51. Annular limiting groove; 52. Support frame; 53. Brake block; 54. Slide groove; 55. Limiting protrusion; 61. First drive cylinder; 62. Second drive cylinder; 63. Mold locking cylinder. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0022] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 As shown, in this embodiment, a mold-locking device is disclosed for locking the moving mold onto the gatepost. The mold-locking device includes several annular limiting grooves 51, a support frame 52, a brake block 53, a first drive cylinder 61, and a mold-locking cylinder 63.

[0025] The annular limiting groove 51 is formed on the gatepost 43 and is used to cooperate with the brake block 53 to position and lock the moving mold 42. The support frame 52 is slidably sleeved on the gatepost 43, and a sliding groove 54 is formed inside the support frame 52. The opening end of the sliding groove 54 faces the gatepost 43 and is used for the brake block 53 to slide inside it.

[0026] The brake block 53 is slidably disposed in the slide groove 54, and its inner wall is provided with several limiting protrusions 55 opposite to the annular limiting groove 51. The first drive cylinder 61 is fixedly disposed on the support frame 52, and its movable end is connected to the brake block 53, enabling it to drive the brake block 53 to slide, causing the limiting protrusions 55 to enter the annular limiting groove 51. Figure 1 For example, when the two brake blocks 53 in the figure approach the gatepost 43, causing the limiting protrusion 55 to enter the annular limiting groove 51, the movement of the brake blocks 53 and the support frame 52 along the axial direction of the gatepost 43 is restricted, thus achieving locking.

[0027] The cylinder body of the mold-locking cylinder 63 is fixed on the moving mold, and the movable end is connected to the support frame 52. When the movement of the support frame 52 along the axial direction of the tie rod 43 is restricted, hydraulic oil is injected into the mold-locking cylinder 63, which can press the moving mold 42 tightly against the fixed mold 41, thereby firmly locking the moving mold 42.

[0028] In one embodiment, there are at least two brake blocks 53. When the limiting protrusion 55 enters the annular limiting groove 51, the two or more brake blocks 53 form an annular structure surrounding the outer periphery of the tie post 43. Under the push of the first drive cylinder 61, the brake blocks 53 can be firmly locked onto the tie post 43, preventing vertical movement. Furthermore, because multiple brake blocks 53 form an annular structure, the force exerted on the brake blocks 53 along the axial direction of the tie post 43 during die casting is more uniform, and the annular limiting groove 51 and the limiting protrusion 55 are less prone to localized damage. This mold-locking device, by forming a closed-loop structure around the tie post 43 with multiple brake blocks 53, can evenly distribute the pressure along the axial direction of the tie post, reducing the risk of localized overload and wear. Especially under high pressure, the annular structure ensures that the brake blocks 53 fit tightly around the outer periphery of the tie post 43, preventing loosening or wear of the mold-locking device and effectively extending the service life of the equipment.

[0029] Typically, the cross-section of the gatepost 43 is circular. Accordingly, in this embodiment, the brake block 53 is arc-shaped, and the groove 54 in the support frame 52 is arranged radially along the gatepost 43. When the brake block 53 slides along the groove 54 until it abuts against the gatepost 43, each brake block 53 forms a ring structure around the outer periphery of the gatepost 43, allowing for a tighter fit with the gatepost 43 and a better locking effect.

[0030] like Figure 1As shown, in this embodiment, the cross-section of the annular limiting groove 51 is rectangular, and correspondingly, the cross-section of the limiting protrusion 55 is also rectangular. When the limiting protrusion 55 enters the annular limiting groove 51, the two can abut tightly together, and the horizontal contact area is large, which can withstand a large force along the length of the guide post 43 during actual use. In other embodiments, the cross-sections of the annular limiting groove 51 and the limiting protrusion 55 can also be set to arc shape, making it easier for the brake block 53 to allow the limiting protrusion 55 to enter the annular limiting groove 51 when sliding.

[0031] In this embodiment, the first drive cylinder 61 is a pneumatic cylinder. Since it only needs to drive the brake block 53 to move along the slide groove 54 and does not directly bear the force along the length of the tie bar 43, using a pneumatic cylinder can significantly reduce its size and facilitate the up-and-down movement of the follower mold 42 along the tie bar 43. Using a pneumatic cylinder to drive the brake block 53 to slide gives the brake block 53 better flexibility and lower energy consumption when performing the mold locking action. Compared with traditional hydraulic cylinder drive, the use of a pneumatic cylinder not only reduces the size of the equipment but also improves the response speed, thereby improving the overall efficiency of the production line.

[0032] In other embodiments, the first drive cylinder 61 can also be set as an electric telescopic cylinder or a hydraulic cylinder, depending on actual needs, which can also drive the brake block 53 to move.

[0033] In this embodiment, a mold clamping mechanism is also disclosed, such as... Figure 2 As shown, the mold closing mechanism includes a fixed mold 41, a moving mold 42, a second drive cylinder 62, and the aforementioned mold locking device. The fixed mold 41 is fixedly mounted on the guide post 43, the moving mold 42 is slidably mounted on the guide post 43, and the two ends of the second drive cylinder 62 are respectively connected to the fixed mold 41 and the moving mold 42. The mold locking device is located between the moving mold 42 and the guide post 43.

[0034] During mold closing, the second drive cylinder 62 first retracts, bringing the moving mold 42 closer to the fixed mold 41 to a preset position. After the annular limiting groove 51 aligns with the limiting protrusion 55, the first drive cylinder 61 extends, fixing the brake block 53 onto the gatepost 43, restricting the movement of the locking cylinder 63 towards the brake block 53. Pressurized oil is injected into the locking cylinder 63, causing the moving mold 42 to press firmly against the fixed mold 41 until the required locking force is reached, thus completing the mold closing and locking actions. During subsequent die casting operations, the moving mold 42 can be firmly fixed to the gatepost 43, preventing pressure leakage inside the mold cavity, thereby maintaining high casting pressure for a long time and ensuring the casting quality of large, thick-walled structural parts.

[0035] In this embodiment, a die-casting machine is also disclosed, such as Figure 3As shown, the die-casting machine includes a frame 45, an injection mechanism 47, and the aforementioned mold-closing mechanism. The frame 45 is the main support structure, fixed to the ground, and used to support other equipment in the die-casting machine. Four tie rods 43 are installed on the frame 45 for mounting the fixed mold 41 and the moving mold 42. The injection mechanism 47 is located on the frame 45, and its outlet is connected to the inlet on the fixed mold 41, enabling it to inject metal hydraulically into the mold cavity.

[0036] When die casting is required, the outlet of the injection mechanism 47 is first connected to the inlet on the fixed mold 41. Then, the mold is closed and locked by the mold closing mechanism. After that, the injection mechanism 47 can inject molten metal into the mold cavity, maintaining a preset pressure to allow the molten metal to cool and solidify, forming the desired casting. In this process, due to the use of the aforementioned mold closing mechanism and mold locking device, pressure leakage inside the mold cavity can be avoided during die casting, thereby maintaining high casting pressure for a long time and ensuring the casting quality of large, thick-walled structural parts.

[0037] Furthermore, in this embodiment, the tie bars 43 are vertically arranged on the frame 45, while the fixed mold 41 and the moving mold 42 are horizontally arranged on the frame 45. Through the reasonable layout of the tie bars 43 and the coordinated design between the moving mold 42 and the fixed mold 41, the molten metal can gradually fill the upper mold cavity from the bottom of the mold, reducing the inclusion of bubbles and gas, and further improving the surface quality and internal structural density of the casting.

[0038] Furthermore, in this embodiment, a mounting bracket 46 is slidably mounted on the frame 45, and the injection mechanism 47 is mounted on the mounting bracket 46. The injection mechanism 47 of the die-casting machine can be slidably removed through the mounting bracket 46, facilitating equipment maintenance and inspection, and reducing operating and maintenance costs. Users can flexibly adjust the position and state of the injection mechanism 47 according to actual needs, thereby improving the operability and adaptability of the equipment.

[0039] Furthermore, in this embodiment, the die-casting machine also includes several pressure-boosting mechanisms 44. These mechanisms are positioned at a predetermined location above the moving mold 42 and can apply pressure to the moving mold 42 towards the fixed mold 41. Specifically, each pressure-boosting mechanism 44 has a telescopic end facing the moving mold 42; when extended, it presses against the moving mold 42 to apply pressure. During die-casting, the pressure in the mold cavity can be increased by the pressure-boosting mechanisms 44, ensuring the quality of the casting. In the high-speed section of the die-casting operation, the pressure-boosting mechanisms 44 can be used to perform the pressure-boosting action, achieving metal feeding within the mold cavity.

[0040] The number and position of the pressurizing mechanism 44 can be set according to the size, structure and thickness of the casting. In addition, when designing the moving mold 42, more local pressurizing and feeding points can be added to correspond to each pressurizing device and match the feeding requirements of large castings.

[0041] Equipped with a pressure boosting mechanism 44, this die-casting machine can provide the necessary feeding pressure according to the shape, size, and thickness of the casting, thereby ensuring that the casting does not develop defects or deformation during the cooling process. The flexible design of the pressure boosting mechanism 44 allows this die-casting machine to adapt to different types and specifications of castings, making it particularly suitable for high-precision, large-size casting processes.

[0042] In summary, based on the traditional die-casting machine, this utility model improves the mold-locking device, mold-closing mechanism, and pressurization function, which not only enhances the pressure control capability in the die-casting process but also improves the overall quality, stability, and production efficiency of the castings, and has broad industrial application prospects.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mold-locking device for locking a moving mold onto a tie rod, characterized in that, include: Several annular limiting grooves are formed on the Corinthian column; The support frame slides onto the Corinthian column and has internal grooves. The brake block is slidably disposed in the groove, and its inner wall is provided with a number of limiting protrusions opposite to the annular limiting groove; The first drive cylinder is fixedly mounted on the support frame, and its movable end is connected to the brake block. It can drive the brake block to slide, so that the limiting protrusion enters the annular limiting groove. The mold-locking cylinder has its body fixed on the moving mold, and its movable end connected to the support frame.

2. The mold-locking device as described in claim 1, characterized in that, There are at least two brake blocks. When the limiting protrusion enters the annular limiting groove, the brake blocks form an annular structure surrounding the outer periphery of the guide post.

3. The mold-locking device as described in claim 2, characterized in that, The brake block is arc-shaped, and the sliding groove is arranged radially along the guide post.

4. The mold-locking device as described in claim 1, characterized in that, The first driving cylinder is a pneumatic cylinder.

5. The mold-locking device as described in claim 1, characterized in that, The cross-section of the annular limiting groove is rectangular or arc-shaped.

6. A mold clamping mechanism, characterized in that, include: The mold is fixedly mounted on the tie rod. The moving mold is slidably mounted on the guide pillar; The second drive cylinder is connected at both ends to the fixed mold and the moving mold, respectively. The mold-locking device as described in any one of claims 1 to 5.

7. A die-casting machine, characterized in that, include: The frame has four golems on it; The mold closing mechanism as described in claim 6 is mounted on the frame; The injection mechanism is located on the frame, and the discharge port is connected to the feed port on the fixed mold.

8. The die-casting machine as described in claim 7, characterized in that, The guide column is vertically mounted on the frame, and the fixed mold and moving mold are horizontally mounted on the frame.

9. The die-casting machine as described in claim 7, characterized in that, The frame is slidably provided with a mounting bracket, and the injection mechanism is mounted on the mounting bracket.

10. The die-casting machine as described in claim 7, characterized in that, Also includes: Several pressurizing mechanisms are located at preset positions above the moving mold, and are capable of applying pressure to the moving mold toward the fixed mold side.

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