Sand casting efficient mold pressing device with rapid mold replacement function

Abstract

The invention discloses a sand casting efficient mold pressing device with a rapid mold replacement function, and belongs to the technical field of casting mold pressing, the sand casting efficient mold pressing device comprises a mold pressing mechanism, a turnover mechanism, a mold taking and placing mechanism and a rotating table driven by a motor, and further comprises a mold, a lower mold box, an upper mold box and a positioning assembly; the turnover mechanism comprises a first turnover frame, a second turnover frame and a turnover driving module; the inner sides of the first overturning frame and the second overturning frame are rotationally mounted in the middle of the rotating table, and an overturning driving module is mounted on the side edge of the rotating table; a mold taking and placing mechanism is mounted on the first overturning frame; the mold taking and placing mechanism comprises a synchronous moving module and a replaceable clamping module. A replaceable clamping module used for clamping a mold is installed at the moving end of the synchronous moving module, a lower mold box is placed on the replaceable clamping module and the second overturning frame, and an upper mold box is placed on the lower mold box. In this way, the die pressing continuity is improved through the rotating table, the die pressing mechanism, the overturning mechanism and the die taking and placing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of casting die pressing, and particularly relates to an efficient sand casting die pressing device with a function of quickly replacing a die. Background Art

[0002] The overall cost of the sand casting process is relatively low, the repairability is good, and it can meet the basic shape and size requirements of high-strength parts. Therefore, in the current field of mechanical manufacturing, it is still widely used. During casting, by matching the die and the die pressing device, the sand material in the upper and lower die boxes is fitted to the outer contour of the die.

[0003] For example, Chinese Patent CN107876709A discloses a sand casting die pressing device. This die pressing device drives the mounting plate and the pressing plate to move through a cylinder. After the die and the sand material are put into the die box, the sand material in the die is compacted to complete die pressing.

[0004] However, the die pressing of sand casting usually includes two upper and lower die boxes. During filling and die pressing, it is necessary to first place the die at the bottom of the lower die box. After the sand material is filled and compacted, the lower die box is turned over; then the upper die box is placed on the lower die box, and then the material is filled and compacted. It is difficult for this die pressing device to automatically turn over the lower die box, thus affecting the continuity of die pressing.

[0005] Based on this, the present invention designs an efficient sand casting die pressing device with a function of quickly replacing a die to solve the above problems. Summary of the Invention

[0006] Aiming at the above-mentioned disadvantages of the prior art, the present invention provides an efficient sand casting die pressing device with a function of quickly replacing a die.

[0007] To achieve the above object, the present invention is realized through the following technical solutions: An efficient sand casting die pressing device with a function of quickly replacing a die includes a die pressing mechanism, a turning mechanism, a die picking and placing mechanism, and a rotating table driven by a motor, and also includes a die, a lower die box, an upper die box, and a positioning component; The die pressing mechanism is arranged at the rear side of the rotating table, and a turning mechanism is installed on the rotating table; the turning mechanism includes a first turning frame, a second turning frame, and a turning driving module; the inner sides of the first turning frame and the second turning frame are rotatably installed in the middle of the rotating table, and two groups of turning driving modules for driving the first turning frame and the second turning frame to turn are installed on the side of the rotating table; A mold picking and placing mechanism is installed on the first flipping frame; the mold picking and placing mechanism includes a synchronous moving module and a replaceable clamping module; the synchronous moving module is installed on the first flipping frame, and the moving end of the synchronous moving module is installed with a replaceable clamping module for clamping the mold. The lower mold box is placed on the replaceable clamping module and the second flipping frame, and the upper mold box is placed on the lower mold box; positioning components are arranged on the replaceable clamping module, the second flipping frame, the lower mold box and the upper mold box.

[0008] Furthermore, the mold pressing mechanism includes a hydraulic press, a mounting plate and a pressing plate. The output end of the hydraulic press is fixedly installed with a mounting plate, and the lower side of the mounting plate is fixedly installed with a pressing plate for compacting the sand material.

[0009] Furthermore, a support platform for supporting the first flipping frame and the second flipping frame is fixedly installed on the rotating table.

[0010] Furthermore, the flipping driving module includes a support frame, a flipping motor, a flipping arm and a guiding block. Guiding blocks are fixedly installed on the sides of the first flipping frame and the second flipping frame; the support frame is fixedly installed on the upper side of the rotating table, and an arc-shaped guiding groove is formed on the support frame; the guiding blocks are slidably limited in the guiding groove; the center of the arc of the guiding groove is consistent with the rotation center of the first flipping frame and the second flipping frame; a flipping motor is fixedly installed on the outside of the support frame, one end of the flipping arm is rotatably connected to the guiding block, the other end of the flipping arm is rotatably installed on the inner side of the support frame, and the rotation center of the flipping arm and the support frame is consistent with the rotation center of the first flipping frame and the second flipping frame; the output end of the flipping motor is fixedly connected to the flipping arm.

[0011] Furthermore, the synchronous moving module includes a driving component and two synchronous components. The driving component is installed on the first flipping frame, and the synchronous components are symmetrically installed on the first flipping frame.

[0012] Furthermore, the driving component includes an electric push rod and a synchronous rotating rod. The electric push rod is rotatably installed on the first flipping frame, and the center of the synchronous rotating rod is rotatably installed in the middle of the first flipping frame.

[0013] Furthermore, the synchronous component includes a connecting rod, a guiding rod and a moving plate. Guiding rods are symmetrically and fixedly installed on the first flipping frame, and the moving plate is slidably limitedly connected to the two guiding rods; one end of the connecting rod is rotatably connected to the end of the synchronous rotating rod, and the other end of the connecting rod is rotatably connected to the moving plate; the output end of the electric push rod is rotatably connected to the end of the connecting rod.

[0014] Further, the replaceable clamping module includes clamping plates, insertion blocks and locking blocks. Two clamping plates are symmetrically arranged, and a conforming groove for clamping the mold is formed between the two clamping plates; multiple groups of insertion slots are symmetrically formed on the moving plate; insertion blocks are fixedly installed on the lower sides of the clamping plates, and the insertion blocks are inserted into the insertion slots; the height of the insertion blocks is consistent with the depth of the insertion slots; a locking block is hinged to the lower side of the insertion block, and a torsion spring is sleeved on the hinge shaft of the locking block and the insertion block, and the two elastic feet of the torsion spring are respectively abutted against the insertion block and the locking block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The replaceable clamping module clamps the mold; the lower mold box is placed on the replaceable clamping module, and the replaceable clamping module is used as the bottom plate of the lower mold box, and then sand is filled into the lower mold box; the rotating table drives the replaceable clamping module and the lower mold box to rotate to the rear side of the rotating table through the first turning frame and the synchronous moving module, and the second turning frame and the lower mold box and the upper mold box that have completed mold pressing on the second turning frame are moved to the front side of the rotating table; at the rear side of the rotating table, the sand in the lower mold box is compacted by the mold pressing mechanism; at the same time, the lower mold box and the upper mold box that have completed mold pressing are removed at the front side of the rotating table; then the turning driving module drives the second turning frame to rotate, so that the second turning frame covers the upper side of the lower mold box, and the turning driving module drives the first turning frame and the second turning frame to rotate together, thereby driving the lower mold box to turn to the front side of the rotating table; the synchronous moving module drives the replaceable clamping module to no longer clamp the mold, and then the turning driving module drives the first turning frame, the synchronous moving module and the replaceable clamping module to rotate to the rear side of the rotating table; the upper mold box is placed on the upper side of the lower mold box at the front side of the rotating table, and sand is filled into the upper mold box; then the rotating table drives the lower mold box and the upper mold box to rotate to the rear side of the rotating table through the second turning frame, and at this time the first turning frame and the replaceable clamping module rotate to the front side of the rotating table; the sand in the upper mold box is compacted by the mold pressing mechanism at the rear side of the rotating table to complete mold pressing; the mold is placed in the replaceable clamping module at the front side of the rotating table, and the mold is clamped by the replaceable clamping module; through the cooperation of the rotating table, the turning driving module, the first turning frame and the second turning frame, the sand in the lower mold box and the upper mold box is continuously compacted, and at the same time the mold is clamped and positioned by the replaceable clamping module, so that the position of the mold in the lower mold box and the upper mold box is accurate, and the mold is automatically clamped and released through the cooperation of the synchronous moving module and the replaceable clamping module, which is convenient for improving the continuity of mold pressing when pressing the same mold; if the mold needs to be replaced, the matching replaceable clamping module can be directly replaced, thereby expanding the application range of the device. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Three-dimensional view of a sand casting high-efficiency die pressing device with a rapid die change function according to the present invention Figure 1 ; Figure 2 Front view of a sand casting high-efficiency die pressing device with a rapid die change function according to the present invention; Figure 3 Schematic diagram of the rotary table and its connection structure Figure 1 ; Figure 4 Schematic diagram of the rotary table and its connection structure Figure 2 ; Figure 5 Schematic diagram of the first flipping frame and its connection structure Figure 1 ; Figure 6 Schematic diagram of the lower mold box structure; Figure 7 Schematic diagram of the clamping plate and its connection structure; Figure 8 Schematic diagram of the first flipping frame and its connection structure Figure 2 。

[0018] The reference numerals in the figures respectively represent: 1. Die pressing mechanism; 11. Hydraulic press; 12. Mounting plate; 13. Pressing plate; 2. Rotary table; 21. Support table; 3. Flipping mechanism; 31. Flipping drive module; 311. Support frame; 312. Flipping motor; 313. Guide groove; 314. Flipping arm; 315. Guide block; 32. First flipping frame; 33. Second flipping frame; 4. Die picking and placing mechanism; 41. Synchronous moving module; 411. Electric push rod; 412. Synchronous rotating rod; 413. Connecting rod; 414. Guide rod; 415. Moving plate; 42. Replaceable clamping module; 421. Clamping plate; 422. Conforming groove; 423. Slot; 424. Insert block; 425. Locking block; 5. Die; 6. Lower mold box; 7. Upper mold box; 81. Positioning pin; 82. Positioning groove. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the following description, the "left", "right", "front", "rear", "upper", and "lower" mentioned are oriented in the perspective direction of the front view.

[0021] Embodiment 1: In some embodiments, please refer to the Figures 1 - 4 of the accompanying drawings of the specification. A high-efficiency die-casting device for sand casting with a function of quickly replacing the mold includes a die-casting mechanism 1, a flipping mechanism 3, a mold picking and placing mechanism 4, and a rotating table 2 driven by a motor. It also includes a mold 5, a lower mold box 6, an upper mold box 7, and a positioning component. The die-casting mechanism 1 is arranged at the rear side of the rotating table 2, and the flipping mechanism 3 is installed on the rotating table 2. The flipping mechanism 3 includes a first flipping frame 32, a second flipping frame 33, and a flipping driving module 31. The inner sides of the first flipping frame 32 and the second flipping frame 33 are rotatably installed in the middle of the rotating table 2, and two groups of flipping driving modules 31 for driving the first flipping frame 32 and the second flipping frame 33 to flip are installed on the side of the rotating table 2. The mold picking and placing mechanism 4 is installed on the first flipping frame 32. The mold picking and placing mechanism 4 includes a synchronous moving module 41 and a replaceable clamping module 42. The synchronous moving module 41 is installed on the first flipping frame 32, and the replaceable clamping module 42 for clamping the mold 5 is installed on the moving end of the synchronous moving module 41. The lower mold box 6 is placed on the replaceable clamping module 42 and the second flipping frame 33, and the upper mold box 7 is placed on the lower mold box 6. The replaceable clamping module 42, the second flipping frame 33, the lower mold box 6, and the upper mold box 7 are provided with positioning components.

[0022] In this embodiment, when the efficient die-casting device for sand casting with the function of rapid die change works normally, the die 5 is placed in the replaceable clamping module 42, and the die 5 is clamped by the replaceable clamping module 42; the lower die box 6 is placed on the replaceable clamping module 42, and the replaceable clamping module 42 serves as the bottom plate of the lower die box 6, and then the sand material is filled into the lower die box 6; the rotating table 2 drives the replaceable clamping module 42, the first turning frame 32 and the lower die box 6 to rotate to the rear side of the rotating table 2 through the first turning frame 32 and the synchronous moving module 41, and the second turning frame 33 and the lower die box 6 and the upper die box 7 that have completed die casting on the second turning frame 33 move to the front side of the rotating table 2; at the rear side of the rotating table 2, the sand material in the lower die box 6 is compacted by the die-casting mechanism 1; meanwhile, at the front side of the rotating table 2, the lower die box 6 and the upper die box 7 that have completed die casting are removed; then the turning drive module 31 drives the second turning frame 33 to rotate, so that the second turning frame 33 covers the upper side of the lower die box 6, and the turning drive module 31 drives the first turning frame 32 and the second turning frame 33 to rotate together, thereby driving the lower die box 6 to turn to the front side of the rotating table 2; the synchronous moving module 41 drives the replaceable clamping module 42 to stop clamping the die 5, and then the turning drive module 31 drives the first turning frame 32, the synchronous moving module 41 and the replaceable clamping module 42 to rotate to the rear side of the rotating table 2; at the front side of the rotating table 2, the upper die box 7 is placed on the upper side of the lower die box 6, and the sand material is filled into the upper die box 7; then the rotating table 2 drives the lower die box 6 and the upper die box 7 to rotate to the rear side of the rotating table 2 through the second turning frame 33, and at this time the first turning frame 32 and the replaceable clamping module 42 rotate to the front side of the rotating table 2; at the rear side of the rotating table 2, the sand material in the upper die box 7 is compacted by the die-casting mechanism 1 to complete die casting; at the front side of the rotating table 2, the die 5 is placed in the replaceable clamping module 42, and the die 5 is clamped by the replaceable clamping module 42; through the cooperation of the rotating table 2, the turning drive module 31, the first turning frame 32 and the second turning frame 33, the sand material in the lower die box 6 and the upper die box 7 is continuously compacted, and at the same time the die 5 is clamped and positioned by the replaceable clamping module 42, so that the position of the die 5 in the lower die box 6 and the upper die box 7 is accurate, and the die 5 is automatically clamped and released through the cooperation of the synchronous moving module 41 and the replaceable clamping module 42, which is convenient for improving the continuity of die casting when die casting the same die 5; if the die 5 needs to be replaced, the matching replaceable clamping module 42 can be directly replaced, thereby expanding the application range of the device.

[0023] Embodiment 2: In some embodiments, as a preferred embodiment of the present invention, as Figures 1 - 2 shown, the die-casting mechanism 1 includes a hydraulic press 11, a mounting plate 12 and a pressing plate 13. The output end of the hydraulic press 11 is fixedly installed with a mounting plate 12, and the lower side of the mounting plate 12 is fixedly installed with a pressing plate 13 for compacting the sand material; As Figure 3As shown, a support table 21 for supporting a first flipping frame 32 and a second flipping frame 33 is fixedly installed on the rotating table 2; The top surface of the lower die box 6 on the first flipping frame 32 and the top surface of the upper die box 7 on the second flipping frame 33 are located on the same horizontal plane; As Figures 2 - 4 As shown, the flipping drive module 31 includes a support frame 311, a flipping motor 312, a flipping arm 314 and a guide block 315. Guide blocks 315 are fixedly installed on the sides of the first flipping frame 32 and the second flipping frame 33; The support frame 311 is fixedly installed on the upper side of the rotating table 2, and an arc-shaped guide groove 313 is formed on the support frame 311; The guide block 315 is slidably limited in the guide groove 313; The center of the arc of the guide groove 313 is consistent with the rotation center of the first flipping frame 32 and the second flipping frame 33; A flipping motor 312 is fixedly installed on the outside of the support frame 311. One end of the flipping arm 314 is rotatably connected to the guide block 315, and the other end of the flipping arm 314 is rotatably installed on the inside of the support frame 311. The rotation center of the flipping arm 314 and the support frame 311 is consistent with the rotation center of the first flipping frame 32 and the second flipping frame 33; The output end of the flipping motor 312 is fixedly connected to the flipping arm 314; As Figures 3 - 8 As shown, the synchronous movement module 41 includes a driving component and two groups of synchronous components. The driving component is installed on the first flipping frame 32, and the synchronous components are symmetrically installed on the first flipping frame 32; The driving component includes an electric push rod 411 and a synchronous rotating rod 412. The electric push rod 411 is rotatably installed on the first flipping frame 32, and the center of the synchronous rotating rod 412 is rotatably installed in the middle of the first flipping frame 32; The synchronous component includes a connecting rod 413, a guide rod 414 and a moving plate 415. Guide rods 414 are symmetrically and fixedly installed on the first flipping frame 32, and the moving plate 415 is slidably limitedly connected to the two guide rods 414; One end of the connecting rod 413 is rotatably connected to the end of the synchronous rotating rod 412, and the other end of the connecting rod 413 is rotatably connected to the moving plate 415; The output end of the electric push rod 411 is rotatably connected to the end of the connecting rod 413; The replaceable clamping module 42 includes clamping plates 421, insertion blocks 424 and locking blocks 425. Two clamping plates 421 are symmetrically arranged, and a conforming groove 422 for clamping the mold 5 is formed between the two clamping plates 421; Multiple groups of insertion slots 423 are symmetrically formed on the moving plate 415; Insertion blocks 424 are fixedly installed on the lower sides of the clamping plates 421, and the insertion blocks 424 are inserted into the insertion slots 423; The height of the insertion block 424 is consistent with the depth of the insertion slot 423; A locking block 425 is hinged to the lower side of the insertion block 424, and a torsion spring is sleeved on the hinge shaft of the locking block 425 and the insertion block 424. The two elastic feet of the torsion spring are respectively abutted against the insertion block 424 and the locking block 425; The positioning component includes positioning pins 81. A plurality of positioning pins 81 are symmetrically and fixedly installed on the lower side of the upper die box 7 and the upper side of the clamping plate 421; a plurality of positioning grooves 82 are symmetrically formed on the upper and lower sides of the lower die box 6; the positioning pins 81 are inserted into the positioning grooves 82; a square groove conforming to the upper side of the lower die box 6 is formed on the second flipping frame 33.

[0024] In this embodiment, when the die pressing mechanism 1, the rotating table 2, the flipping mechanism 3, and the die picking and placing mechanism 4 are working properly, the die 5 is placed in the slot 423 between the two clamping plates 421. The electric push rod 411 drives the moving plate 415 to move synchronously under the limiting action of the guiding rod 414 through the synchronous rotating rod 412 and the connecting rod 413, so as to drive the clamping plate 421 to move synchronously through the inserting block 424 and the locking block 425, and clamp the die 5 through the clamping plate 421; then align the positioning groove 82 on the lower side of the lower die box 6 with the positioning pin 81 on the clamping plate 421, place the lower die box 6 on the clamping plate 421 and fill the lower die box 6 with sand; the rotating table 2 drives the first flipping frame 32, the guiding rod 414, the moving plate 415, the clamping plate 421, and the die picking and placing mechanism 4 to rotate to the rear side of the rotating table 2, and the hydraulic press 11 drives the mounting plate 12 and the pressing plate 13 to move vertically to compact the sand in the lower die box 6; start the flipping motor 312 on one side to drive the flipping arm 314 to rotate, and the flipping arm 314 drives the second flipping frame 33 to rotate through the guiding block 315 so that the second flipping frame 33 covers the upper side of the lower die box 6; then the flipping motors 312 on both sides drive the first flipping frame 32 and the second flipping frame 33 to rotate together through the flipping arms 314 and the guiding blocks 315 on both sides, so as to drive the lower die box 6 to flip to the front side of the rotating table 2; the electric push rod 411 drives the moving plate 415 to move to both sides through the synchronous rotating rod 412 and the connecting rod 413, so as to drive the clamping plate 421 to move to both sides through the inserting block 424 and the locking block 425, so that the clamping plate 421 no longer clamps the die 5; then the flipping motor 312 drives the flipping arm 314 to rotate, and the flipping arm 314 drives the first flipping frame 32 to rotate to the rear side of the rotating table 2 through the guiding block 315; so that the clamping plate 421 is separated from the die 5; on the front side of the rotating table 2, place the upper die box 7 on the upper side of the lower die box 6, position the upper die box 7 through the positioning pin 81 and the positioning groove 82, and fill the upper die box 7 with sand; then the rotating table 2 drives the lower die box 6 and the upper die box 7 to rotate to the rear side of the rotating table 2 through the second flipping frame 33, and at this time the first flipping frame 32 rotates to the front side of the rotating table 2; on the rear side of the rotating table 2, compact the sand in the upper die box 7 through the hydraulic press 11, the mounting plate 12, and the pressing plate 13 to complete die pressing; place the die 5 between the clamping plates 421 on the front side of the rotating table 2, and clamp the die 5 through the clamping plate 421; realize continuous die pressing; If it is necessary to replace the mold 5, the locking block 425 can be rotated so that the locking block 425 rotates to align with the slot 423, and then the clamping plate 421, the insertion block 424 and the locking block 425 are removed from the moving plate 415; and the locking block 425 on the lower side of the clamping plate 421 adapted to the new mold 5 is rotated, the torsion spring twists, so that the locking block 425 aligns with the slot 423, the locking block 425 and the insertion block 424 are inserted into the slot 423, and the torsion spring resets to drive the locking block 425 to reset, completing the locking of the slot 423.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient die-casting device for sand casting with a function of rapid die change, comprising a die-casting mechanism (1), a turning mechanism (3), a die picking and placing mechanism (4), and a rotating table (2) driven by a motor, characterized in that, It further includes a mold (5), a lower mold box (6), an upper mold box (7) and a positioning component; The die pressing mechanism (1) is arranged at the rear side of the rotating table (2), and a turnover mechanism (3) is installed on the rotating table (2); the turnover mechanism (3) includes a first turnover frame (32), a second turnover frame (33) and a turnover driving module (31); the inner sides of the first turnover frame (32) and the second turnover frame (33) are rotatably installed in the middle of the rotating table (2), and two groups of turnover driving modules (31) for driving the first turnover frame (32) and the second turnover frame (33) to turnover are installed on the side of the rotating table (2); A mold picking and placing mechanism (4) is installed on the first turnover frame (32); the mold picking and placing mechanism (4) includes a synchronous moving module (41) and a replaceable clamping module (42); the synchronous moving module (41) is installed on the first turnover frame (32), and the mobile end of the synchronous moving module (41) is installed with a replaceable clamping module (42) for clamping the mold (5), the lower mold box (6) is placed on the replaceable clamping module (42) and the second turnover frame (33), and the upper mold box (7) is placed on the lower mold box (6); positioning components are arranged on the replaceable clamping module (42), the second turnover frame (33), the lower mold box (6) and the upper mold box (7).

2. The sand casting high-efficiency die pressing device with a rapid die change function according to claim 1, characterized in that, The die pressing mechanism (1) includes a hydraulic press (11), a mounting plate (12) and a pressing plate (13), the output end of the hydraulic press (11) is fixedly installed with the mounting plate (12), and a pressing plate (13) for compacting the sand material is fixedly installed on the lower side of the mounting plate (12).

3. The sand casting high-efficiency die pressing device with a rapid die change function according to claim 1, characterized in that, A support table (21) for supporting the first turnover frame (32) and the second turnover frame (33) is fixedly installed on the rotating table (2).

4. The efficient die-casting device for sand casting with a rapid die change function according to claim 1, characterized in that, The turnover driving module (31) includes a support frame (311), a turnover motor (312), a turnover arm (314) and a guide block (315), and guide blocks (315) are fixedly installed on the sides of the first turnover frame (32) and the second turnover frame (33); the support frame (311) is fixedly installed on the upper side of the rotating table (2), and an arc-shaped guide groove (313) is formed in the support frame (311); the guide block (315) is slidably limited in the guide groove (313); the center of the arc of the guide groove (313) is consistent with the rotation center of the first turnover frame (32) and the second turnover frame (33); A turnover motor (312) is fixedly installed on the outer side of the support frame (311), one end of the turnover arm (314) is rotatably connected with the guide block (315), the other end of the turnover arm (314) is rotatably installed on the inner side of the support frame (311), and the rotation center of the turnover arm (314) and the support frame (311) is consistent with the rotation center of the first turnover frame (32) and the second turnover frame (33); The output end of the turnover motor (312) is fixedly connected with the turnover arm (314).

5. The efficient die-casting device for sand casting with a rapid die change function according to claim 1, characterized in that, The synchronous moving module (41) includes a driving component and two groups of synchronous components, the driving component is installed on the first turnover frame (32), and the synchronous components are symmetrically installed on the first turnover frame (32).

6. The sand casting high-efficiency die pressing device with a rapid die change function according to claim 5, characterized in that, The driving assembly includes an electric push rod (411) and a synchronous rotating rod (412). The electric push rod (411) is rotatably installed on the first flipping frame (32), and the center of the synchronous rotating rod (412) is rotatably installed in the middle of the first flipping frame (32).

7. The high-efficiency die pressing device for sand casting with a rapid die replacement function according to claim 6, characterized in that: The synchronous assembly includes a connecting rod (413), a guide rod (414) and a moving plate (415). The guide rods (414) are symmetrically and fixedly installed on the first flipping frame (32), and the moving plate (415) is in limiting sliding connection with the two guide rods (414); one end of the connecting rod (413) is rotatably connected to the end of the synchronous rotating rod (412), and the other end of the connecting rod (413) is rotatably connected to the moving plate (415); the output end of the electric push rod (411) is rotatably connected to the end of the connecting rod (413).

8. The sand casting high-efficiency die pressing device with a rapid die change function according to claim 7, characterized in that, The replaceable clamping module (42) includes clamping plates (421), insertion blocks (sub>424) and locking blocks (425). Two clamping plates (421) are symmetrically arranged, and a conforming groove (422) for clamping the mold (5) is formed between the two clamping plates (421); multiple groups of slots (423) are symmetrically formed on the moving plate (415); insertion blocks (424) are fixedly installed on the lower sides of the clamping plates (421), and the insertion blocks (424) are inserted into the slots (423); the height of the insertion blocks (424) is the same as the depth of the slots (423); a locking block (425) is hinged to the lower side of the insertion block (424), and a torsion spring is sleeved on the hinge shaft of the locking block (425) and the insertion block (424), and the two elastic legs of the torsion spring are respectively abutted against the insertion block (424) and the locking block (425).

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