A large die casting mold frame

Abstract

The application discloses a large-scale die-casting mold frame and belongs to the technical field of die-casting mold frames. The die-casting mold frame comprises a supporting mechanism, the supporting mechanism comprises guide shafts on supporting plates, a fixed mold and a movable mold are arranged on the guide shafts, a plurality of mounting holes are arranged in the fixed mold, a ejection spraying mechanism is arranged in each mounting hole, the ejection spraying mechanism comprises a first sleeve, a second sleeve and a connecting piece, the connecting piece and the two sleeves form a cylinder body, a plug and an injection assembly are arranged at two ends of the cylinder body, the fixed mold and the movable mold can be synchronously sprayed from the inside after the mold is opened, the fluid diffusion type vortex mode is adopted, the inner wall can be quickly covered, the adhesion effect is enhanced, local accumulation or omission is reduced, the problem of the blind area of the traditional outside-to-inside vertical spraying is eliminated, various complex cavity structures in the large-scale mold frame are met, casting defects such as tearing and depression are obviously reduced, the ejection spraying mechanism is linked with the action of the ejector rod, an independent spraying process is saved, and the production rhythm is shortened.

Description

Technical Field

[0001] This invention relates to the manufacture of high-quality copper castings, and more specifically to the technical field of die-casting mold frames, particularly a large die-casting mold frame. Background Technology

[0002] Large die-casting mold sets are the basic framework and supporting structure of die-casting molds, and are a core component of pressure casting (die-casting) equipment. They are typically composed of key components such as upper mold base, lower mold base, guide pillars, guide sleeves, ejection mechanisms, and positioning devices. They have a large overall size and load-bearing capacity and are mainly used for the production of large or ultra-large die-casting parts. Die-casting mold sets are the "bridge" connecting die-casting equipment and mold functional components. Their performance directly affects the precision of die-casting parts, production efficiency, and mold life. They are indispensable in large-scale production in fields such as automobile manufacturing and large machinery.

[0003] Die casting is a precision forming process in which molten metal is rapidly pressed into a mold cavity under high pressure, and then cooled and solidified to obtain a casting. It is widely used in the automotive, home appliance, and 3C industries. The overall process can be divided into three main stages: preparation, forming, and post-processing. The forming stage is the core of die casting. The molten metal is formed by rapid filling under high pressure. Then the mold is opened, and the formed workpiece is ejected by the ejector rod. In the mold-open state, a release agent (mostly water-based emulsion containing lubricants and cooling components) is evenly sprayed onto the mold cavity and core surface through a spray gun to reduce the adhesion between the casting and the mold, making it easier to demold. At the same time, the release agent evaporates and absorbs heat to help cool the mold and regulate the cavity temperature.

[0004] Currently, the main method of spraying is through automatic spray guns. Typically, a top-driven structure moves the automatic spray gun from top to bottom between the fixed and moving molds after mold opening to perform the spraying operation. While this method offers a degree of automation, it has significant limitations under complex conditions. Because the sprayed liquid is perpendicular to the mold cavity, and die-casting mold cavities often have complex structures such as deep cavities, grooves, bosses, and side holes (e.g., automotive gearbox housings, engine blocks), the release agent is easily blocked by the protruding parts of the cavity during vertical spraying, resulting in "spraying blind spots" in areas such as side walls, corners, and the bottom of deep holes. These areas are prone to casting sticking and surface scratches due to insufficient release agent, or porosity and shrinkage due to uneven cooling. In addition, this type of automatic spraying requires spraying to be completed after the mold opens and before ejection. Its movement must be strictly synchronized with the opening and closing of the mold and the movement of the ejection mechanism (to avoid collision). This will easily lead to the need to reserve extra time for the robotic arm to spray after the mold opens. For production lines with strict cycle time requirements (such as zinc alloy die castings, cycle time < 10 seconds), this will significantly reduce production efficiency. It is also necessary to reserve a large working space in advance to park the equipment used to drive the automatic spray gun, making the factory environment of large die casting more complex. Summary of the Invention

[0005] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. The die-casting mold frame of this invention, belonging to the field of high-quality copper casting manufacturing, primarily provides a large die-casting mold frame to solve the technical problem mentioned in the background section where vertical injection from the outside to the inside of the mold cavity during mold opening results in a certain injection blind zone.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A large die-casting mold frame includes a support mechanism located on the worktable of a die-casting machine. The support mechanism includes a first support plate and a second support plate, with a guide shaft between the first and second support plates. A fixed mold and a moving mold are mounted on the guide shaft, and the moving mold slides linearly on the guide shaft. The inner cavity of the fixed mold has multiple mounting holes, and each mounting hole has an ejector spraying mechanism. The ejector spraying mechanism includes a first sleeve, a second sleeve, and a connector. The connector is located between the two sleeves, and the connector and the two sleeves form a cylinder. Both ends of the cylinder have plugs and injection components, and the plugs fit tightly with the mounting holes. The side walls of the first and second sleeves each have mounting ports, and each mounting port is rotatably connected to a spray pipe. The spray pipe on the first sleeve faces the inner wall of the fixed mold, and the spray pipe on the second sleeve faces the inner wall of the moving mold. The spray pipes facing both sides can be deflected and opened synchronously. Each ejector spraying mechanism is connected to a drive mechanism at the end near the first support plate.

[0008] Preferably, a first movable block and a second movable block with toothed sidewalls are slidably connected inside the first sleeve and the second sleeve, respectively. The first movable block is hollow inside, and a movable frame is also provided inside the first sleeve. One end of the movable frame passes through the first movable block and abuts against one side of the second movable block.

[0009] Preferably, a reversing component is provided between the movable frame and the first movable block. The reversing component includes a mounting frame, on which a reversing gear is rotatably connected. The reversing gear meshes with a first rack and a second rack, with the first rack located in a groove in the movable frame and the second rack located in a groove on the upper side of the inner wall of the first movable block.

[0010] Preferably, a limiting block is also provided inside the second sleeve, one side of the limiting block is connected to the plug, a return spring is provided on the limiting block, and one end of the return spring is connected to the interface of the second moving block.

[0011] Preferably, the nozzle has multiple nozzles on the side near the sleeve, and each nozzle is arranged linearly at equal intervals. The other side of the nozzle has a connecting hole that communicates with the nozzle. A driven gear is provided on the shaft of the nozzle, and the driven gear meshes with the rack on the corresponding moving block.

[0012] Preferably, the second sleeve, the first sleeve, and the connector are all provided with multiple through holes, the through holes on the same axis are connected to each other and form a flow channel, and the output ends of the through holes on the two sleeves are connected to the corresponding connecting holes through flexible hoses.

[0013] Preferably, the injection assembly includes a connector and a cover, which are detachably connected. The cover has multiple inlet holes that communicate with through holes. A connecting ring is provided between the connector and the cover, and an injection port is provided on the connecting ring. Shaft seals are provided at the connection points between the connecting ring and the connector and the cover. An L-shaped groove is provided on one side of the connector.

[0014] Preferably, the driving mechanism includes a detachable housing, with connecting frames provided on the upper and lower sides of the housing, and a connecting rod provided on each connecting frame. The connecting rod passes through a circular hole on the fixed mold and is connected to the moving mold.

[0015] Preferably, the housing is provided with a plurality of hollow rotating shafts, each hollow rotating shaft is provided with a pulley, and adjacent pulleys are connected by a belt. Each hollow rotating shaft is provided with a bearing at the connection position with the housing, and each hollow rotating shaft is provided with a locking block at its front end, which can engage with an L-shaped locking groove.

[0016] Preferably, a cylinder and a motor are provided outside the housing. The output end of the cylinder is provided with a pull plate, and a push rod is provided on the pull plate. The push rod passes through the corresponding injection component and abuts against one end of the moving frame. The output end of the motor is provided with a first gear, which meshes with a second gear. The second gear is provided on a corresponding hollow rotating shaft.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) This invention, through the arrangement of a first sleeve, a second sleeve, a connector, a plug, an injection component, a first moving block, a second moving block, a nozzle, a driven gear, a moving frame, a reversing component, a limiting block, and a return spring, enables simultaneous spraying of the inner cavities of the fixed mold and the moving mold directly from the inside after mold opening. Combined with the diffusion-type vortex flow of the fluid, it can quickly cover the inner walls of the fixed mold and the moving mold. The vortex flow enhances the adhesion of the fluid to the cavity surface, reducing local accumulation or omissions, further improving the consistency and uniformity of the coating, and eliminating… The traditional vertical spraying method from the outside in has blind spots. Because the nozzles are arranged linearly at equal intervals on the nozzle, the fluid exhibits a nested diffusion with gradually increasing radii after the nozzle rotates. This satisfies the spraying method of covering the near area with a small radius and the far area with a large radius. The gradient coverage of dense near areas and sparse far areas can better adapt to the differences in the depth of the cavity, meet the requirements of various complex cavity structures in large mold frames, significantly reduce defects such as casting scratches and dents, improve surface accuracy and product consistency, and at the same time improve fluid utilization and reduce material waste.

[0019] (2) By setting a first sleeve, a second sleeve, a connector and a plug, the present invention achieves deep coupling between the spraying function and the ejector rod action, breaking through the limitations of the traditional independent spraying process. It enables the spraying operation to be started synchronously from inside the mold after the mold is opened. By using the structural integration design, the spraying function is linked with the ejector rod movement, eliminating the need for additional equipment such as driving the spraying structure to move between the moving mold and the fixed mold. It avoids the external movement space required by the traditional drive spraying structure, such as running guide rails or clearance gaps. For large molds or multi-cavity complex molds, this "built-in" design can reduce the difficulty of mold processing, shorten the production cycle, reduce interference of moving parts, reduce the risk of failure, and improve system stability. Compared with the prior art, this collaborative mechanism simplifies equipment configuration, reduces investment and maintenance costs, and reduces operation links, significantly improving production efficiency. It solves the problems of low efficiency, poor coverage and large space occupation in the traditional demolding process.

[0020] (3) This invention, through the coordinated arrangement of the shell, hollow rotating shaft, bearing, connecting frame, and linkage rod, achieves stable ejection of the casting by utilizing the force of the existing die-casting machine during the mold opening process, enabling the moving mold to drive the ejection spraying mechanism. This utilizes the power of existing equipment, reduces additional driving devices, optimizes the overall structural layout, reduces mechanical wear, and improves the stability and accuracy of the ejection action, avoiding casting deformation caused by unstable ejection. Simultaneously, under the coordinated drive of the cylinder, pull plate, and push rod, the orderly rotation and opening of the spray nozzles in all directions on the cylinder are achieved, ensuring the spraying... The nozzle unfolding angle is precisely controllable, and the action is seamlessly connected without any jamming, avoiding spraying omissions caused by the action delay of traditional spraying mechanisms. In addition, the transmission system consisting of pulleys, motors, first gears, and second gears ensures that each nozzle rotates synchronously, ensuring that the spraying dosage and coverage rhythm are consistent at different positions on the inner wall of the fixed mold and the moving mold, achieving uniform spraying over the entire area, eliminating the blind spots of traditional single-point spraying, greatly improving spraying efficiency, reducing mold release agent waste, and reducing defects such as sticking and scratches on castings caused by uneven spraying, further ensuring product quality stability.

[0021] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a physical model drawing of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is an exploded view of the overall structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the mold connection of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection of the ejector spraying mechanism of the present invention;

[0027] Figure 6 This is an exploded view of the cylindrical body of the present invention;

[0028] Figure 7 This is an exploded view of the ejector spraying mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the second sleeve structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the nozzle structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the reverse component structure of the present invention;

[0032] Figure 11This is an exploded view of the injection component of the present invention;

[0033] Figure 12 This is an exploded view of the drive mechanism of the present invention;

[0034] Figure 13 This is a schematic diagram of the hollow rotating shaft connection of the present invention.

[0035] In the diagram: 1. Support mechanism; 11. First support plate; 12. Second support plate; 13. Guide shaft; 2. Fixed mold; 21. Mounting hole; 3. Moving mold; 4. Ejection spraying mechanism; 41. First sleeve; 42. Second sleeve; 421. Mounting port; 423. Through hole; 43. Connector; 44. Plug; 45. First moving block; 451. Second moving block; 46. Spray pipe; 461. Nozzle; 462. Connecting hole; 463. Driven gear; 47. Moving frame; 48. Reverse assembly; 481. Mounting frame; 482. Reverse gear; 48 3. First rack; 484. Second rack; 49. Limiting block; 491. Return spring; 5. Drive mechanism; 51. Housing; 52. Cylinder; 53. Pull plate; 54. Push rod; 55. Hollow rotating shaft; 551. Locking block; 56. Pulley; 57. Motor; 571. First gear; 572. Second gear; 58. Bearing; 59. Connecting frame; 591. Linking rod; 6. Injection assembly; 61. Connecting head; 611. L-shaped slot; 62. Cover; 621. Inlet hole; 63. Connecting ring; 631. Injection port; 64. Shaft seal. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Example 1, please refer to the appendix for details. Figure 1-13 As shown, a large die-casting mold frame includes a support mechanism 1 located on the worktable of a die-casting machine. The support mechanism 1 includes a first support plate 11 and a second support plate 12. A guide shaft 13 is provided between the first support plate 11 and the second support plate 12. A fixed mold 2 and a moving mold 3 are provided on the guide shaft 13. The moving mold 3 slides linearly on the guide shaft 13. A plurality of mounting holes 21 are provided in the inner cavity of the fixed mold 2. An ejector spraying mechanism 4 is provided in each mounting hole 21. The ejector spraying mechanism 4 includes a first sleeve 41, a second sleeve 42, and a connector 43. The connector 43 is located between the two... Between the sleeves, the connecting piece 43 and the two sleeves form a cylinder. The two ends of the cylinder are respectively provided with a plug 44 and an injection component 6. The plug 44 fits tightly with the mounting hole 21. The side walls of the first sleeve 41 and the second sleeve 42 are provided with mounting ports 421. Each mounting port 421 is rotatably connected to a spray pipe 46. The spray pipe 46 on the first sleeve 41 faces the inner wall of the fixed mold 2, and the spray pipe 46 on the second sleeve 42 faces the inner wall of the moving mold 3. The spray pipes 46 facing both sides can be deflected and opened synchronously. Each ejection spraying mechanism 4 is connected to a drive mechanism 5 at one end near the first support plate 11.

[0040] The above structure enables simultaneous spraying of the inner cavities of the fixed mold 2 and the moving mold 3 directly from the inside after mold opening. Combined with the diffusion-type vortex flow of the fluid, it can quickly cover the inner walls of the fixed mold 2 and the moving mold 3. The vortex flow enhances the fluid's adhesion to the cavity surface, reducing local accumulation or omissions, further improving the consistency and uniformity of the coating. It eliminates the blind spots of traditional vertical spraying from the outside in. The gradually increasing radius of the nested diffusion allows for spraying with a small radius covering the near area and a large radius covering the far area. The gradient coverage, with denser coverage near the near and sparser coverage farther away, better adapts to the depth differences of the cavity, meeting the requirements of various complex cavity structures in large mold frames. It significantly reduces defects such as casting scratches and dents, improving surface precision and product consistency. Furthermore, it is linked with the ejector pin action, eliminating the need for a separate spraying process, shortening the production cycle. The compact design saves space, reduces interference from moving parts, lowers the probability of failure, and improves system stability. Compared to existing technologies, it reduces equipment investment and maintenance costs, improves fluid utilization, and reduces material waste.

[0041] The specific operation is as follows: During the mold opening process, the die casting machine pulls the moving mold 3 away from the fixed mold 2. Under the action of the connecting rod 591, the hollow rotating shaft 55 in the drive mechanism 5 gradually approaches the connecting head 61 (leaving sufficient space to remove the casting). Then, the locking block 551 on the hollow rotating shaft 55 slides into the L-shaped slot 611 on the connecting head 61. Under the action of the motor 57, the locking block 551 deflects to the bottom of the L-shaped slot 611. As the moving mold 3 moves, the hollow rotating shaft 55 begins to... Pushing the ejector spraying mechanism 4, the plug 44 disengages from the mounting hole 21, ejecting the casting. When the fixed mold 2 moves to the set position, the cylinder of the ejector spraying mechanism 4 extends out of the mounting hole 21, and the folded edge of the cover 62 of the injection component 6 aligns with the mounting hole 21, removing the casting. Subsequently, the cylinder 52 is activated, pulling the push rod 54 towards the fixed mold 2 via the pull plate 53. The push rod 54 passes through the injection component 6 and abuts against one end of the moving frame 47, thereby pushing the moving frame 47. The second moving block 451 is compressed by the return spring 491. With the cooperation of the mounting bracket 481, the reverse gear 482, the first rack 483 and the second rack 484, the first moving block 45 moves in the opposite direction to the second moving block 451. Under the action of the driven gear 463 and each moving block, the nozzle 46 on the fixed mold 2 side deflects and opens clockwise, and the nozzle 46 on the moving mold 3 side deflects and opens counterclockwise. At the same time, the release agent enters from the injection port 631 into the cavity formed by the connector 61 and the cover 62, and then flows into the flow channel formed by the through hole 423 through the inlet. Subsequently, it enters the nozzle 46 through the corresponding hose and the connecting hole 462 and is sprayed out through the nozzle 461. At this time, the motor 57 drives the first gear 571 to rotate. Subsequently, under the action of the second gear 572, the pulley 56 and the belt, multiple hollow shafts rotate synchronously, thereby multiple ejection spraying mechanisms 4 rotate synchronously, so that the sprayed liquid vortex quickly covers the inner wall of the mold.

[0042] After completion, cylinder 52 separates push rod 54 from moving frame 47 via pull plate 53, reset spring 491 deforms and resets, and simultaneously drives two moving blocks to return to their original positions. Each nozzle 46 deflects and retracts into the corresponding mounting port 421. Then, moving mold 3 moves to the side of fixed mold 2 again. At the same time, under the action of connecting rod 591, locking block 551 and L-shaped locking groove 611, ejecting spraying mechanism 4 resets, so that plug 44 is locked into mounting port 421 (there is a limit in mounting port 421, so that plug 44 can only be moved out from the side of moving mold 3). At the same time, motor 57 drives hollow rotating shaft 55 to reverse, so that locking block 551 disengages from the bottom of L-shaped slide groove, ensuring that locking block 551 can slide out smoothly from L-shaped slide groove, that is, hollow rotating shaft 55 separates from connector 61. Then fixed mold 2 contacts moving mold 3, mold closes, and the next casting is carried out.

[0043] Example 2, please refer to the appendix for details. Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, a first movable block 45 and a second movable block 451 with toothed sidewalls are slidably connected inside the first sleeve 41 and the second sleeve 42, respectively. The first movable block 45 is hollow inside. A movable frame 47 is also provided inside the first sleeve 41. One end of the movable frame 47 passes through the first movable block 45 and abuts against one side of the second movable block 451. A reversing component 48 is provided between the movable frame 47 and the first movable block 45. The reversing component 48 includes a mounting bracket 481, on which a rotatable connection is made. A reverse gear 482 is provided, which meshes with a first rack 483 and a second rack 484. The first rack 483 is located in a groove in the movable frame 47, and the second rack 484 is located in a groove on the upper side of the inner wall of the first movable block 45. Through the mutual cooperation between the movable frame 47 and the reverse assembly 48, the two movable blocks are driven to move linearly in opposite directions. A limit block 49 is also provided inside the second sleeve 42. One side of the limit block 49 is connected to the plug 44, and a return spring 491 is provided on the limit block 49. One end of the return spring 491 is connected to the interface of the second moving block 451. Through the cooperation between the return spring 491 and the limiting block 49, a force is provided for the reset of the two moving blocks. The nozzle 46 is provided with multiple nozzles 461 near the sleeve, and each nozzle 461 is linearly arranged at equal intervals. The other side of the nozzle 46 is provided with a connecting hole 462, which communicates with the nozzles 461. A driven gear 463 is provided on the shaft of the nozzle 46, and the driven gear 463 interacts with the corresponding moving block. The rack and pinion on the moving block engages, and through the driven gear 463, it enables the corresponding nozzle 46 to deflect and open, providing driving force. The second sleeve 42, the first sleeve 41 and the connecting piece 43 are all provided with multiple through holes 423. The through holes 423 on the same axis are connected to form a flow channel, and the output ends of the through holes 423 on the two sleeves are connected to the corresponding connecting holes 462 through hoses. Through the mutual cooperation between the hoses, connecting holes 462 and through holes 423, the release agent is delivered to the corresponding nozzle 46.

[0044] Example 3, please refer to the appendix for details. Figure 11 , Figure 12 and Figure 13As shown, the injection assembly 6 includes a connector 61 and a cover 62, which are detachably connected. The cover 62 has multiple inlet holes 621 communicating with through holes 423. A connecting ring 63 is provided between the connector 61 and the cover 62, and an injection port 631 is provided on the connecting ring 63. Shaft seals 64 are provided at the connections between the connecting ring 63 and the connector 61 and the cover 62. An L-shaped groove 611 is provided on one side of the connector 61, allowing the connection to proceed through the connector 61, connecting ring 63, and cover 62. The cooperation between the connecting ring 63 and the shaft seal 64 ensures that the connecting ring 63 does not rotate during the synchronous rotation of the connecting head 61 and the cover 62, thus ensuring the stable injection of the release agent from the injection port 631. The driving mechanism 5 includes a detachable housing 51, with connecting frames 59 respectively provided on the upper and lower sides of the housing 51. Each connecting frame 59 is provided with a connecting rod 591, which passes through a circular hole on the fixed mold 2 and connects to the moving mold 3. Through the connecting rod 591 and the connecting frame 59, the internal parts of the housing 51 are driven during the movement of the moving mold 3. The housing 51 contains multiple hollow rotating shafts 55, each with a pulley 56 connected to adjacent pulleys via a belt. A bearing 58 is located at the connection point between each hollow rotating shaft 55 and the housing 51. Each hollow rotating shaft 55 has a locking block 551 at its front end, which engages with an L-shaped slot 611. Through the cooperation between the locking block 551 and the L-shaped slot 611, the hollow rotating shaft 55 can drive the ejector spraying mechanism 4 to rotate and move linearly. An external cylinder 52 and a motor 57 are provided. The output end of the cylinder 52 is provided with a pull plate 53, and a push rod 54 is provided on the pull plate 53. The push rod 54 passes through the corresponding injection component 6 and abuts against one end of the moving frame 47. The output end of the motor 57 is provided with a first gear 571, which meshes with a second gear 572. The second gear 572 is provided on the corresponding hollow rotating shaft 55. Through the first gear 571, belt, pulley 56, motor 57 and second gear 572, the synchronous rotation of each ejector spraying mechanism 4 is achieved.

[0045] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A large die-casting mold frame, comprising a support mechanism (1) located on the worktable of a die-casting machine, the support mechanism (1) comprising a first support plate (11) and a second support plate (12), a guide shaft (13) being disposed between the first support plate (11) and the second support plate (12), a fixed mold (2) and a moving mold (3) being disposed on the guide shaft (13), the moving mold (3) sliding linearly on the guide shaft (13), characterized in that... The fixed mold (2) has multiple mounting holes (21) in its inner cavity. Each mounting hole (21) is equipped with an ejector spraying mechanism (4). The ejector spraying mechanism (4) includes a first sleeve (41), a second sleeve (42), and a connector (43). The connector (43) is located between the two sleeves, and the connector (43) and the two sleeves constitute a cylinder. The two ends of the cylinder are respectively equipped with a plug (44) and an injection assembly (6). The plug (44) fits tightly with the mounting hole (21). The first sleeve (41) and the second sleeve (42) are provided with mounting ports (421) on their side walls. Each mounting port (421) is rotatably connected to a spray pipe (46). The spray pipe (46) on the first sleeve (41) faces the inner wall of the fixed mold (2), and the spray pipe (46) on the second sleeve (42) faces the inner wall of the moving mold (3). The spray pipes (46) facing both sides can be deflected and opened synchronously. Each ejection spraying mechanism (4) is connected to a drive mechanism (5) at one end near the first support plate (11). The first sleeve (41) and the second sleeve (42) are respectively slidably connected to a first moving block (45) and a second moving block (451) with racks on all four sides. The first moving block (45) is hollow inside. The first sleeve (41) is also provided with a moving frame (47). One end of the moving frame (47) passes through the first moving block (45) and abuts against one side of the second moving block (451). A reversing component (48) is provided between the movable frame (47) and the first movable block (45). The reversing component (48) includes a mounting frame (481). A reversing gear (482) is rotatably connected to the mounting frame (481). The reversing gear (482) meshes with a first rack (483) and a second rack (484). The first rack (483) is located in the groove of the movable frame (47), and the second rack (484) is located in the groove on the upper side of the inner wall of the first movable block (45). The nozzle (46) has multiple nozzles (461) near the sleeve side, and each nozzle (461) is arranged linearly at equal intervals. The other side of the nozzle (46) has a connecting hole (462) that communicates with the nozzle (461). A driven gear (463) is provided on the shaft of the nozzle (46), and the driven gear (463) meshes with the rack on the corresponding moving block. The second sleeve (42), the first sleeve (41) and the connector (43) are all provided with multiple through holes (423). The through holes (423) on the same axis are connected to form a flow channel, and the output ends of the through holes (423) on the two sleeves are connected to the corresponding connecting holes (462) through flexible hoses. The drive mechanism (5) includes a detachable housing (51), and connecting frames (59) are respectively provided on the upper and lower sides of the housing (51). Each connecting frame (59) is provided with a connecting rod (591), and the connecting rod (591) passes through the round hole on the fixed mold (2) and is connected to the moving mold (3). The housing (51) is provided with a plurality of hollow shafts (55), each hollow shaft (55) is provided with a pulley (56), and adjacent pulleys (56) are connected by a belt. Each hollow shaft (55) and housing (51) is provided with a bearing (58) at the connection position. Each hollow shaft (55) is provided with a locking block (551) at the front end, and the locking block (551) can engage with the L-shaped locking groove (611).

2. A large die-casting mold frame according to claim 1, characterized in that, The second sleeve (42) is also provided with a limiting block (49), one side of the limiting block (49) is connected to the plug (44), and a reset spring (491) is provided on the limiting block (49), and one end of the reset spring (491) is connected to the interface of the second moving block (451).

3. A large die-casting mold frame according to claim 1, characterized in that, The injection assembly (6) includes a connector (61) and a cover (62). The connector (61) and the cover (62) are detachably connected. The cover (62) is provided with multiple inlet holes (621), which communicate with through holes (423). A connecting ring (63) is provided between the connector (61) and the cover (62). An injection port (631) is provided on the connecting ring (63). A shaft seal (64) is provided at the connection between the connecting ring (63) and the connector (61) and the cover (62). An L-shaped groove (611) is provided on one side of the connector (61).

4. A large die-casting mold frame according to claim 1, characterized in that, A cylinder (52) and a motor (57) are provided outside the housing (51). A pull plate (53) is provided at the output end of the cylinder (52). A push rod (54) is provided on the pull plate (53). The push rod (54) passes through the corresponding injection component (6) and abuts against one end of the moving frame (47). A first gear (571) is provided at the output end of the motor (57). The first gear (571) is meshed with a second gear (572). The second gear (572) is provided on the corresponding hollow rotating shaft (55).

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