Core pulling device for die casting molds

Abstract

The present application discloses a core pulling device suitable for a die-casting mold, including a rectangular housing, a mounting block, an oil cylinder, a guide side bar, a guide tube, a guide rod, a first fixed block, a threaded tube, a screw, a second fixed block, a guide bar, a guide groove, a guide hole, a pressure rod, a guide ring, a slider, a rocker, a first gear, a second gear, a worm, a worm wheel, a rotating shaft, an inner groove, a pressure plate, a spiral spring, a wear-resistant pressure block, a first magnet block, and a second magnet block. The present application is beneficial in that it has the function of facilitating the disassembly and replacement of the slider; it is convenient for compensating for the wear of the guide after long-term use, ensuring the compression of the spiral spring, thereby ensuring that the wear-resistant pressure block is in good contact with the guide bar, ensuring the guiding effect, and avoiding the generation of gaps, or the spiral spring is compressed too loosely, which affects the stability of the guide.

Description

Technical Field

[0001] The present application relates to a core pulling device, in particular to a core pulling device suitable for a die casting mold. Background Art

[0002] The die-casting mold is a tool for casting metal parts, a tool that completes the die-casting process on a special die-casting forging machine; the basic process of die-casting is: the molten metal is first cast and filled into the mold cavity at a low or high speed, and the mold has a movable cavity surface. It is pressurized and forged with the cooling process of the molten metal, which not only eliminates the shrinkage and shrinkage defects of the blank, but also makes the internal structure of the blank reach the broken grains of the forged state. The comprehensive mechanical properties of the blank are significantly improved; with the rapid development of the automobile industry, more and more die-casting parts are widely used. Some products cannot be directly ejected from the mold due to their complex structure during die-casting production, and a core-pulling mechanism needs to be set. After the mold is opened, the movement of the core-pulling cylinder drives the slider seat and the slider core to be pulled out of the area that cannot be directly ejected from the mold, so that qualified die-casting parts can be smoothly taken out.

[0003] The existing core pulling device generally drives the slider through the oil cylinder, and the core pulling is achieved by moving the slider. The obvious disadvantages of this device are the lack of a guiding mechanism and poor movement stability. At the same time, it is not easy to disassemble and replace the slider. When changing the design, the slider may need to be replaced. The replacement of the slider is inconvenient and easily affects the overall processing efficiency. Therefore, in view of the above problems, a core pulling device suitable for die casting molds is proposed. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present application provides a core pulling device suitable for a die-casting mold, comprising a rectangular shell and an oil cylinder arranged at the bottom of the rectangular shell, the front and back of the oil cylinder are fixedly connected with guide side strips, the bottom of the guide side strip is provided with a guide hole along the length direction, the guide hole is slidably connected with a guide strip, one end of the guide strip is fixedly connected with one side of a slider, one side of the slider is provided with a groove, the inside of the groove is fixedly engaged with a second magnet block, the second magnet block is magnetically connected to the first magnet block, and one side of the first magnet block is fixedly connected with the output end of the oil cylinder;

[0005] An inner groove is provided inside the guide side strip, the inner groove is connected and installed with the guide hole, three elastic pressing guide mechanisms are arranged at equal intervals inside the inner groove, and the bottom of the elastic pressing guide mechanism is slidably connected with the guide groove provided on the top of the guide strip;

[0006] A guide mechanism is provided between the mounting rectangular shell and the guide side strip, and two ends of the guide mechanism are respectively fixedly connected to the mounting rectangular shell and the guide side strip, and a self-locking transmission mechanism is provided inside the mounting rectangular shell, and an input end of the self-locking transmission mechanism is fixedly connected to a rocker, and the rocker is rotatably connected to one side of the mounting rectangular shell, and the self-locking transmission mechanism has four output ends, and an output end of the self-locking transmission mechanism is fixedly connected to a threaded tube, and the threaded tube is rotatably connected to the bottom end of the mounting rectangular shell, and the threaded tube is threadedly connected to a screw, and one end of the screw is fixedly connected to a second fixed block, and the second fixed block is fixedly connected to the guide side strip.

[0007] Furthermore, the elastic clamping guide mechanism includes a pressure rod, a pressure plate, a coil spring and a wear-resistant pressure block, the bottom end of the pressure rod is fixedly connected to the middle of the pressure plate, and the pressure plate and the wear-resistant pressure block are elastically connected via the coil spring.

[0008] Furthermore, one end of the coil spring is fixedly connected to the surface of the pressure plate, and the other end of the coil spring is fixedly connected to the surface of the wear-resistant pressure block.

[0009] Furthermore, a guide ring is fixedly connected to the top of the guide side strip, and the guide ring is connected to the pressure rod with a clearance fit.

[0010] Furthermore, four corners of the top of the rectangular installation shell are fixedly connected with installation blocks, and the installation blocks are rectangular block structures.

[0011] Furthermore, the guide mechanism includes a guide tube, a guide rod and a first fixed block, the guide tube is connected to the guide rod with a clearance fit, one end of the guide tube is fixedly connected to the mounting rectangular shell, one end of the guide rod is fixedly connected to the first fixed block, and the first fixed block is fixedly connected to the guide side strip.

[0012] Furthermore, the self-locking transmission mechanism includes a worm and a worm wheel, and the number of the worms is two. Both of the two worms are rotatably connected to the inside of the rectangular housing. A second gear is fixedly sleeved on the surface of the worm, and the second gear is meshingly connected to the first gear. The first gear is fixedly sleeved to one end of the rocker, and both sides of the two worms are meshingly connected to worm wheels. A rotating shaft is fixedly connected to the middle of the worm wheel, one end of the rotating shaft is rotatably connected to the rectangular housing, and the other end of the rotating shaft is fixedly connected to one end of the threaded tube.

[0013] Furthermore, the diameter of the first gear is three times the diameter of the second gear, and the number of the second gears is two.

[0014] Furthermore, limit strip seats are provided on both sides of the guide rod, and the length of the guide rod is the same as the length of the guide tube.

[0015] Furthermore, the wear-resistant pressing block is a long strip structure, and the thickness of the wear-resistant pressing block is greater than the depth of the guide groove.

[0016] The beneficial effect of the present application is that the present application provides a core pulling device suitable for a die-casting mold, which has good guiding stability and is easy to disassemble and assemble a slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the top structure of the guide side strip according to an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the internal structure of a rectangular housing installed in one embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the internal structure of a guide side strip according to an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the connection structure between a slider and an oil cylinder output shaft according to an embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of the structure of the first gear and the second gear of an embodiment of the present application;

[0024] Figure 7 This is a schematic diagram of the threaded tube and screw structure of an embodiment of the present application;

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of a guide tube and a guide rod according to an embodiment of the present application.

[0026] In the figure: 1. install rectangular shell, 2. install block, 3. oil cylinder, 4. guide side strip, 5. guide tube, 6. guide rod, 7. first fixed block, 8. threaded tube, 9. screw, 10. second fixed block, 11. guide strip, 12. guide groove, 13. guide hole, 14. pressure rod, 15. guide ring, 16. slider, 17. rocker, 18. first gear, 19. second gear, 20. worm, 21. worm wheel, 22. rotating shaft, 23. inner groove, 24. pressure plate, 25. coil spring, 26. wear-resistant pressure block, 27. first magnet block, 28. second magnet block. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0031] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] See also Figure 1-8 As shown, a core pulling device suitable for a die-casting mold comprises a rectangular housing 1 and a cylinder 3 arranged at the bottom of the rectangular housing 1, the front and back of the cylinder 3 are fixedly connected with guide side strips 4, the bottom of the guide side strip 4 is provided with a guide hole 13 along the length direction, the guide hole 13 is slidably connected with a guide strip 11, one end of the guide strip 11 is fixedly connected with one side of a slider 16, one side of the slider 16 is provided with a groove, the inside of the groove is fixedly connected with a second magnet block 28, the second magnet block 28 is magnetically connected with the first magnet block 27, and one side of the first magnet block 27 is fixedly connected with the output end of the cylinder 3;

[0034] An inner groove 23 is provided inside the guide side strip 4, and the inner groove 23 is connected and installed with the guide hole 13. Three elastic pressing guide mechanisms are arranged at equal intervals inside the inner groove 23, and the bottom of the elastic pressing guide mechanism is slidably connected with the guide groove 12 provided on the top of the guide strip 11;

[0035] A guide mechanism is provided between the installation rectangular shell 1 and the guide side bar 4, and the two ends of the guide mechanism are fixedly connected to the installation rectangular shell 1 and the guide side bar 4 respectively. A self-locking transmission mechanism is provided inside the installation rectangular shell 1, and the input end of the self-locking transmission mechanism is fixedly connected to a rocker 17, and the rocker 17 is rotatably connected to one side of the installation rectangular shell 1. The self-locking transmission mechanism has four output ends, and the output end of the self-locking transmission mechanism is fixedly connected to a threaded tube 8, and the threaded tube 8 is rotatably connected to the bottom end of the installation rectangular shell 1, and the threaded tube 8 is threadedly connected to a screw rod 9, and one end of the screw rod 9 is fixedly connected to a second fixed block 10, and the second fixed block 10 is fixedly connected to the guide side bar 4;

[0036] To compensate for the worn guide, the threaded tube 8 can be rotated by shaking the rocker 17 through the transmission of the first gear 18, the second gear 19, the worm 20 and the worm wheel 21. By cooperating with the action of the screw 9 and the guiding action of the guide rod 6 and the guide tube 5, the adjustment of the distance between the installed rectangular shell 1 and the guide side strip 4 can be achieved. After wear, the guide groove 12 is deepened. By changing the distance between the installed rectangular shell 1 and the guide side strip 4, the coil spring 25 can be pressed down to ensure the compression amount of the coil spring 25, thereby ensuring that the wear-resistant pressure block 26 is in better contact with the guide strip 11, ensuring the guiding effect, avoiding the generation of gaps, or the coil spring 25 is compressed too loose, which affects the stability of the guide.

[0037] The elastic clamping guide mechanism includes a pressure rod 14, a pressure plate 24, a coil spring 25 and a wear-resistant pressure block 26. The bottom end of the pressure rod 14 is fixedly connected to the middle of the pressure plate 24. The pressure plate 24 and the wear-resistant pressure block 26 are elastically connected through the coil spring 25. The wear-resistant pressure block 26 is pressed and contacted with the guide strip 11 through the coil spring 25. The coil spring 25 is compressed to provide pressure, thereby ensuring the clamping force of the limit position and avoiding the occurrence of gaps that affect the guiding effect. One end of the coil spring 25 is fixedly connected to the surface of the pressure plate 24, and the other end of the coil spring 25 is fixedly connected to the surface of the wear-resistant pressure block 26. ; A guide ring 15 is fixedly connected to the top of the guide side strip 4, and the guide ring 15 is connected with the pressure rod 14 with clearance fit; the four corners of the top of the installation rectangular shell 1 are fixedly connected with mounting blocks 2, and the mounting block 2 is a rectangular block structure, which improves the structural position of the installation; the guide mechanism includes a guide tube 5, a guide rod 6 and a first fixed block 7, the guide tube 5 is connected with the guide rod 6 with clearance fit, one end of the guide tube 5 is fixedly connected to the installation rectangular shell 1, one end of the guide rod 6 is fixedly connected to the first fixed block 7, and the first fixed block 7 is fixedly connected to the guide side strip 4, It provides a guiding function for the vertical movement of the guide side bar 4; the self-locking transmission mechanism includes a worm 20 and a worm wheel 21, the number of the worm 20 is two, and the two worms 20 are rotatably connected to the inside of the installation rectangular housing 1, the surface of the worm 20 is fixedly sleeved with a second gear 19, the second gear 19 is meshed with the first gear 18, the first gear 18 is fixedly sleeved with one end of the rocker 17, and the two sides of the two worms 20 are meshed with worm wheels 21, and the middle of the worm wheel 21 is fixedly connected with a rotating shaft 22, and one end of the rotating shaft 22 is connected to the installation rectangular housing 1. The shell 1 is rotatably connected, and the other end of the rotating shaft 22 is fixedly connected to one end of the threaded tube 8 for transmission, so as to realize the rotation drive of the four threaded tubes 8. At the same time, through the action of the worm wheel 21 and the worm 20, the self-locking effect is realized, thereby improving the stability of the adjustment; the diameter of the first gear 18 is three times the diameter of the second gear 19, and the number of the second gears 19 is two; limit strip seats are provided on both sides of the guide rod 6, and the length of the guide rod 6 is the same as the length of the guide tube 5; the wear-resistant pressure block 26 is a long strip structure, and the thickness of the wear-resistant pressure block 26 is greater than the depth of the guide groove 12.

[0038] It should be noted that the wear-resistant pressing block 26 and the guide side strip 4 are made of materials with high wear resistance, and when the guide friction occurs, the guide strip 11 bears the wear.

[0039] When the whole device is used, it is used in conjunction with the die-casting mold and is installed on the die-casting mold or the processing table. It is installed specifically through the mounting block 2. After the whole device is installed as a whole, the whole device is in an inverted state. Figure 1 The state shown is turned upside down;

[0040] When in use, the slide block 16 is pushed by the oil cylinder 3 to move, and the use is realized. When moving, it is guided by the guide strip 11, the guide groove 12 and the wear-resistant pressure block 26. After long-term use, the guide strip 11 is worn. By shaking the rocker 17 in the positive direction, the meshing transmission of the first gear 18 and the second gear 19 makes the worm 20 rotate, and the meshing transmission of the worm 20 and the worm wheel 21 makes the rotating shaft 22 and the threaded tube 8 rotate, and the guiding of the guide tube 5 and the guide rod is coordinated to make the guide side strip 4 move in the vertical direction, and the distance between the guide side strip 4 and the installation rectangular shell 1 is reduced. The pressure rod 14 is pressed by the installation rectangular shell 1, so that the pressure plate 24 presses the spiral spring 25, and the guide strip 11 is pressed by the wear-resistant pressure block 26, so as to avoid the guide gap of the guide strip 11, thereby ensuring the stability of the guide.

[0041] When it is necessary to replace the slider 16, the slider 16 and the guide bar 11 form a whole and are replaced as a whole. By rotating the rocker 17 in the opposite direction, the distance between the guide side bar 4 and the installation rectangular shell 1 is increased, and the slider 16 is pulled to separate the first magnet block 27 and the second magnet block 28, and the guide side bar 4 is separated from the guide bar 11. The disassembly is completed and the replacement is completed. The second magnet block 28 on the new slider 16 is magnetically adsorbed to the first magnet block 27 to achieve installation. The guide bar 11 passes through the guide hole 13 to complete the installation. By shaking the rocker 17 in the forward direction, the distance between the guide side bar 4 and the installation rectangular shell 1 is reduced, and the guide bar 11 can be re-tightened. The tightening effect can be judged by manually pulling out the slider 16 and judging by the friction resistance.

[0042] The benefits of this application are:

[0043] Compared with the traditional core-pulling device, this core-pulling device suitable for the die-casting mold has the function of facilitating the disassembly and replacement of the slider 16, and is convenient for temporary replacement. Specifically, by pulling the slider 16, the first magnet block 27 is separated from the second magnet block 28, and the guide bar 11 is pulled out and separated from the guide side bar 4. The guide bar 11 on the replaced slider 16 is inserted into the guide side bar 4, and the first magnet block 27 is magnetically connected to the second magnet block 28. The operation is simple and the replacement is convenient.

[0044] This core-pulling device suitable for die-casting molds is convenient for compensating for the worn guide after long-term use. By shaking the rocker 17, the threaded tube 8 can be rotated through the transmission of the first gear 18, the second gear 19, the worm 20, and the worm wheel 21. With the action of the screw 9 and the guiding action of the guide rod 6 and the guide tube 5, the adjustment of the distance between the installed rectangular shell 1 and the guide side strip 4 can be achieved. After wear, the depth of the guide groove 12 is deepened. By changing the distance between the installed rectangular shell 1 and the guide side strip 4, the spiral spring 25 can be pressed down to ensure the compression amount of the spiral spring 25, thereby ensuring that the wear-resistant pressure block 26 is in good contact with the guide strip 11, ensuring the guiding effect, avoiding the generation of gaps, or the spiral spring 25 is compressed too loose, which affects the stability of the guide.

[0045] At the same time, the whole adopts a self-locking transmission mechanism for transmission, which has a self-locking function. After the distance between the rectangular shell 1 and the guide side strip 4 is adjusted during installation, the adjusted distance can be guaranteed, and it is not easily affected by external non-human factors, causing changes in the distance, thereby ensuring the overall use effect.

[0046] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this application does not involve improvements to software and methods.

[0047] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A core pulling device suitable for a die casting mold, characterized in that: The invention comprises a rectangular housing (1) and a cylinder (3) arranged at the bottom of the rectangular housing (1), the front and back of the cylinder (3) being fixedly connected to guide side strips (4), the bottom of the guide side strip (4) being provided with a guide hole (13) along the length direction, the guide hole (13) being slidably connected to a guide strip (11), one end of the guide strip (11) being fixedly connected to one side of a slider (16), one side of the slider (16) being provided with a groove, the inside of the groove being fixedly engaged with a second magnet block (28), the second magnet block (28) being magnetically connected to the first magnet block (27), and one side of the first magnet block (27) being fixedly connected to the output end of the cylinder (3); An inner groove (23) is provided inside the guide side strip (4), the inner groove (23) is connected and installed with the guide hole (13), three elastic pressing guide mechanisms are arranged at equal intervals inside the inner groove (23), and the bottom of the elastic pressing guide mechanism is slidably connected with the guide groove (12) provided on the top of the guide strip (11); A guide mechanism is provided between the mounting rectangular shell (1) and the guide side strip (4), the two ends of the guide mechanism being fixedly connected to the mounting rectangular shell (1) and the guide side strip (4) respectively, a self-locking transmission mechanism is provided inside the mounting rectangular shell (1), an input end of the self-locking transmission mechanism is fixedly connected to a rocker (17), the rocker (17) is rotatably connected to one side of the mounting rectangular shell (1), the self-locking transmission mechanism has four output ends, the output end of the self-locking transmission mechanism is fixedly connected to a threaded tube (8), the threaded tube (8) is rotatably connected to the bottom end of the mounting rectangular shell (1), the threaded tube (8) is threadedly connected to a screw rod (9), one end of the screw rod (9) is fixedly connected to a second fixing block (10), the second fixing block (10) is fixedly connected to the guide side strip (4); The elastic pressing guide mechanism comprises a pressing rod (14), a pressing plate (24), a coil spring (25) and a wear-resistant pressing block (26); the bottom end of the pressing rod (14) is fixedly connected to the middle of the pressing plate (24); the pressing plate (24) and the wear-resistant pressing block (26) are elastically connected via the coil spring (25); The self-locking transmission mechanism comprises a worm (20) and a worm wheel (21), wherein the number of the worm (20) is two, and the two worms (20) are both rotatably connected inside the mounting rectangular housing (1), a second gear (19) is fixedly sleeved on the surface of the worm (20), the second gear (19) is meshingly connected with the first gear (18), the first gear (18) is fixedly sleeved with one end of the rocker (17), both sides of the two worms (20) are meshingly connected with the worm wheel (21), a rotating shaft (22) is fixedly connected in the middle of the worm wheel (21), one end of the rotating shaft (22) is rotatably connected to the mounting rectangular housing (1), and the other end of the rotating shaft (22) is fixedly connected to one end of the threaded tube (8).

2. The core pulling device for die casting mold according to claim 1, characterized in that: One end of the coil spring (25) is fixedly connected to the surface of the pressure plate (24), and the other end of the coil spring (25) is fixedly connected to the surface of the wear-resistant pressure block (26).

3. The core pulling device for die casting mold according to claim 1, characterized in that: A guide ring (15) is fixedly connected to the top of the guide side strip (4), and the guide ring (15) is connected to the pressure rod (14) with a clearance fit.

4. The core pulling device for die casting mold according to claim 1, characterized in that: The four corners of the top of the rectangular mounting shell (1) are all fixedly connected with mounting blocks (2), and the mounting blocks (2) are rectangular block structures.

5. The core pulling device for die casting mold according to claim 1, characterized in that: The guide mechanism comprises a guide tube (5), a guide rod (6) and a first fixed block (7); the guide tube (5) and the guide rod (6) are connected with each other by clearance fit; one end of the guide tube (5) is fixedly connected to the mounting rectangular housing (1); one end of the guide rod (6) is fixedly connected to the first fixed block (7); and the first fixed block (7) is fixedly connected to the guide side strip (4).

6. The core pulling device for die casting mold according to claim 1, characterized in that: The diameter of the first gear (18) is three times the diameter of the second gear (19), and the number of the second gears (19) is two.

7. The core pulling device for die casting mold according to claim 5, characterized in that: Limiting strip seats are provided on both sides of the guide rod (6), and the length of the guide rod (6) is the same as the length of the guide tube (5).

8. The core pulling device for die casting mold according to claim 1, characterized in that: The wear-resistant pressing block (26) is a long strip structure, and the thickness of the wear-resistant pressing block (26) is greater than the depth of the guide groove (12).

Images