Lost foam vibration table

Abstract

This invention relates to the field of lost foam casting technology, and more specifically, to a lost foam vibration table, comprising a base and a platform, with a sand box positioning device at the upper end of the platform; two sets of excitation devices are provided on the lower end face of the platform, each set including two excitation mechanisms with identical structures and symmetrical about the center of the platform; each excitation mechanism includes a base, a first deformation seat, a second deformation seat, and a mounting base, the base being fixedly connected to the lower end face of the platform, the two ends of the first deformation seat being rotatably connected to the base and the second deformation seat respectively, and the mounting base being fixedly connected to the second deformation seat, with an eccentric mechanism rotatably arranged inside the mounting base. By setting two sets of independently adjustable excitation mechanisms, the angle of the eccentric mechanism in each set can be adjusted by the deformation seat, enabling horizontal excitation in the X and Y directions, as well as vertical excitation in the Z direction, greatly improving the adaptability of the equipment to different process requirements.

Description

Technical Field

[0001] This invention relates to the field of lost foam casting technology, and more specifically, to a lost foam vibration table. Background Technology

[0002] Lost foam casting, also known as solid foam casting, is an advanced casting process that combines a foam plastic model with dry sand and pours it into the final product under vibration. Existing vibration tables typically use fixed-mounted eccentric motors or vibratory motors, which can only generate vibration in a single direction, such as horizontal (X-axis, Y-axis) or vertical (Z-axis) vibration. However, in actual lost foam casting, different process stages or casting structures require different vibration directions. Horizontal vibration helps to evenly fill the sand horizontally, while vertical vibration facilitates rapid sand settling and venting. The limitation of existing vibration tables—their single vibration direction and inability to flexibly adjust according to process requirements—severely restricts their process adaptability and the quality of the final casting.

[0003] Furthermore, existing vibration tables generally suffer from complex structures and cumbersome operations in their positioning and clamping mechanisms for the sand box. In particular, common clamping mechanisms often place the load directly on the rollers at the bottom of the sand box. Under prolonged and intense vibration, this can easily cause impact and wear on the rollers, shortening their service life and increasing equipment maintenance costs.

[0004] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, a lost foam vibration table is provided that can achieve multi-directional vibration, adjustable vibration direction, and convenient positioning and clamping of the sand box.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A lost foam vibrating table includes a base and a platform, which are connected by an air spring. A sand box positioning device is provided on the upper end of the platform. Two sets of excitation devices are provided on the lower end face of the platform. Each set of excitation devices includes two excitation mechanisms with the same structure and symmetrical about the center of the platform. The vibration excitation mechanism includes a base, a first deformable seat, a second deformable seat, and a mounting base. The base is fixedly connected to the lower end face of the platform. The two ends of the first deformable seat are rotatably connected to the base and the second deformable seat, respectively. The mounting base is fixedly connected to the second deformable seat. An eccentric mechanism is rotatably arranged inside the mounting base, and the eccentric mechanism is connected to an eccentric motor. It also includes a first angle control mechanism for driving the first deformable seat to rotate relative to the base and a second angle control mechanism for driving the second deformable seat to rotate relative to the first deformable seat; the included angle between the end faces of the first deformable seat and the second deformable seat is 45°.

[0007] Preferably, both the first deformable seat and the second deformable seat include a straight segment I, a curved segment and a straight segment II arranged in sequence as an integral structure. A connecting ring I is fixedly provided on the straight segment I of the first deformable seat, an mounting ring I is fixedly provided on the base, and a clamp I is provided outside the base. The inner side of the clamp I is provided with a first annular groove that is fixedly connected to the mounting ring I and a second annular groove that is rotatably engaged with the connecting ring I. The first angle control mechanism includes a synchronous belt I and a control rod I rotatably disposed within the base. The control rod I is fixedly connected to the first deformable seat. A synchronous pulley I is disposed on the control rod I, which rotates synchronously with the control rod I. The two ends of the synchronous belt I are respectively located in the two bases of the same group of excitation devices and mesh with the corresponding synchronous pulleys I. A drive pulley I that meshes with the synchronous belt I is disposed at the lower end of the platform. A stop is disposed on the side of the synchronous belt I away from the drive pulley I. The drive pulley I is connected to a reducer and an angle control motor I.

[0008] Preferably, an installation ring II is fixedly provided on the straight segment II of the first deformable seat, a connecting ring II is fixedly provided on the straight segment I of the second deformable seat, a clamp II is provided outside the first deformable seat, and a third annular groove fixedly connected to the installation ring II and a fourth annular groove rotatably engaged with the connecting ring II are provided on the inner side of the clamp II. The second angle control mechanism includes an angle control motor II and a planetary gear reducer. The gear ring of the planetary gear reducer is mounted on the first deformable seat, and the planet carrier of the planetary gear reducer is connected to the second deformable seat. The angle control motor II is mounted on the first deformable seat, and the motor shaft of the angle control motor II is connected to the central wheel of the planetary gear reducer.

[0009] Preferably, a locking mechanism is provided between the first deformable seat and the base, and between the second deformable seat and the first deformable seat. The locking mechanism includes a positioning gear ring and a positioning ring. The positioning gear ring and the positioning ring are respectively fixedly connected to two rotatingly mating parts. Two electric push rods are symmetrically arranged on the positioning ring. The working end of the electric push rod is connected to a tooth. When the electric push rod extends, the tooth inserts into the tooth groove of the positioning gear ring and locks the positioning gear ring and the positioning ring.

[0010] Preferably, the upper end of the platform is provided with a track that cooperates with the bottom wheel of the sand box, and the sand box positioning device includes a positioning rod and a positioning block. The positioning rod is fixedly set on the platform, and the positioning block includes a fixed block and a sliding block. The fixed block is fixedly connected to the bottom of the sand box, and the sliding block is slidably set on the fixed block in the vertical direction and is limited in the upper and lower positions of the fixed block. A pressure block is fixedly installed on the outside of the sliding block. The lower end of the pressure block is provided with an insertion hole that cooperates with the positioning rod, and the front end of the pressure block is provided with a guide groove that communicates with the insertion hole.

[0011] Preferably, the sand box positioning device further includes a column and a sliding pressure rod. The column is fixedly mounted on the platform, and the sliding pressure rod is slidably mounted on the column in the horizontal direction. A hydraulic cylinder I for driving the sliding pressure rod to move is provided on the column. One end of the sliding pressure rod is provided with a lower inclined surface, and the pressure block is provided with an upper inclined surface that cooperates with the lower inclined surface.

[0012] Preferably, the side of the pressure block is provided with a guide groove, and the sliding pressure rod is provided with an elastic rod that cooperates with the guide groove. The inlet section of the guide groove is higher than the outlet section. When the elastic rod is located at the outlet section, the positioning rod and the insertion hole are released from the limit.

[0013] Preferably, the sand box positioning device further includes a top support mechanism, which includes a top support base, a top support block, and a top support plate. The top support base is fixedly installed in the middle of the platform. Two top support blocks are provided and are slidably installed on the top support base respectively. The upper end of the top support block is an inclined surface. The top support plate is slidably installed on the top support base in the vertical direction. The lower end of the top support plate is provided with an inclined block that cooperates with the top support block. Both support blocks are connected to racks, and the two racks mesh with the same control gear and are symmetrical about the center of the control gear. One of the support blocks is connected to hydraulic cylinder II.

[0014] Preferably, the lower end of the platform is provided with pre-embedded bolts, and a flange that mates with the pre-embedded bolts is fixedly provided on the base.

[0015] Preferably, a triaxial vibration sensor is provided on the upper end of the shelf.

[0016] The beneficial effects of this invention compared to the prior art are as follows: 1. This invention features two independently adjustable excitation mechanisms. The angle of the eccentric mechanism within each mechanism can be adjusted via a deformable seat. This device can achieve not only horizontal excitation in the X and Y directions, but also vertical excitation in the Z direction, and mixed excitation at any angle in between, greatly enhancing the equipment's adaptability to different process requirements.

[0017] 2. The sand box positioning device achieves rapid positioning through automatic gravity insertion and lifts the sand box before clamping via a top support mechanism, causing the sand box bottom wheels to detach from the storage platform. This avoids the bottom wheels bearing alternating loads during vibration, effectively extending the service life of the sand box bottom wheels.

[0018] 3. This invention employs clamp connections and positioning gear locking structures to ensure the operational stability of the vibration mechanism after angle adjustment. Combined with automatic track loading and unloading, precise angle control by servo motors, and real-time monitoring by triaxial vibration sensors, it provides a reliable guarantee for automated production. Attached Figure Description

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lower structure of the shelf; Figure 3 for Figure 2 A magnified view of part A in the image; Figure 4 This is a schematic diagram of the state of the excitation mechanism during Z-axis excitation; Figure 5 A schematic diagram of the state of the excitation mechanism during X-axis and Y-axis excitation; Figure 6 This is a schematic diagram of the installation ring I structure; Figure 7 A cross-sectional view of the excitation mechanism in one direction; Figure 8 for Figure 7 A magnified view of part B in the image; Figure 9 for Figure 7 A magnified view of part C; Figure 10 for Figure 7 A magnified view of part D; Figure 11 This is a cross-sectional view of the excitation mechanism from another direction. Figure 12 This is a cross-sectional view of the present invention; Figure 13 for Figure 12 A magnified view of part E in the image; Figure 14 This is a schematic diagram of the positioning block structure; Figure 15 This is a schematic diagram of the supporting mechanism.

[0021] In the diagram: 1-Base; 2-Placement platform; 21-Rail; 22-Embedded bolt; 3-Air spring; 4-Sand box positioning device; 41-Positioning rod; 42-Positioning block; 421-Fixing block; 422-Sliding block; 423-Pressure block; 424-Insertion hole; 425-Guide sloping groove; 426-Guide groove; 4261-Inlet section; 4262-Outlet section; 43-Column; 44-Sliding pressure rod; 441-Elastic rod; 45-Hydraulic cylinder I; 46-Top support mechanism; 461-Top support seat; 462-Top support block; 463-Top support plate; 464-Control gear; 465-Hydraulic cylinder II; 5-Vibration mechanism; 51-Base; 511-Mounting ring I; 512-Clamp I; 5121-First annular groove; 5122-Second annular groove; 513-Flange 52-First Deformation Seat; 521-Straight Segment I; 522-Curved Segment; 523-Straight Segment II; 524-Connecting Ring I; 525-Mounting Ring II; 526-Clamp II; 53-Second Deformation Seat; 531-Connecting Ring II; 54-Mounting Seat; 55-First Angle Control Mechanism; 551-Synchronous Belt I; 552-Control Rod I; 553-Synchronous Belt Pulley I; 554-Drive Pulley I; 555-Stop Block; 556-Reducer; 557-Angle Control Motor I; 56-Second Angle Control Mechanism; 561-Angle Control Motor II; 562-Planetary Gear Reducer; 6-Eccentric Mechanism; 61-Eccentric Motor; 7-Locking Mechanism; 71-Positioning Gear Ring; 72-Positioning Ring; 73-Electric Push Rod; 74-Gear Shaper; 8-Triaxial Vibration Sensor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: like Figures 1 to 15 As shown, a lost foam vibrating table includes a base 1 and a platform 2. The base 1 and the platform 2 are connected by a vibrating table structure, that is, by an air spring 3. When the vibrating table is working, the sand box is placed on the platform 2, and the platform 2 is driven to vibrate by the excitation device, thereby realizing the vibration of the sand box.

[0024] Preferably, a track 21 is provided above the storage platform 2, and the two ends of the track 21 are aligned with the conveying track of the sand box, so as to realize the automatic loading and unloading of the sand box onto and off the storage platform 2 and improve work efficiency.

[0025] Two sets of excitation devices are provided on the lower end face of the platform 2. Each set of excitation devices includes two excitation mechanisms 5 with the same structure and symmetrical about the center of the platform. In the initial state, the two sets of excitation devices can excite the platform 2 in the X direction and Y direction, which are perpendicular to each other.

[0026] Specifically, the vibration mechanism 5 includes a base 51, a first deformable seat 52, a second deformable seat 53, and a mounting seat 54. The two ends of the first deformable seat 52 are rotatably connected to the base 51 and the second deformable seat 53, respectively. The mounting seat 54 is fixedly connected to the second deformable seat. The base 51 is fixedly connected to the lower end face of the platform 2. Specifically, the lower end of the platform 2 is provided with a pre-embedded bolt 22. A flange 513 that mates with the pre-embedded bolt 22 is fixedly provided on the base 51. The base 51 is fixedly connected to the platform 2 through the flange 513.

[0027] Both the first deformable seat 52 and the second deformable seat 53 include a straight segment I 521, a curved segment 522 and a straight segment II 523 arranged in sequence as an integral structure. The included angle between the two end faces of the first deformable seat 52 and the second deformable seat 53 is 45°, that is, the curved segment 522 is an arc with a central angle of 45°.

[0028] The initial state of the excitation mechanism 5 refers to the state in which the axis of the base 51 is parallel to the axis of the mounting base 54. An eccentric mechanism 6 is rotatably installed inside the mounting base 54. The eccentric mechanism 6 is connected to an eccentric motor 61. The eccentric motor 61 drives the eccentric mechanism 6 to rotate, thereby causing the platform 2 to vibrate.

[0029] In the initial state, if the two eccentric mechanisms 6 in the same group of excitation devices rotate synchronously in opposite directions, the vibration direction of this group of excitation devices will be perpendicular to the line connecting the two excitation mechanisms 5 (because the rotational torque caused by the eccentric mechanism 6 and the platform 2 not being on the same plane is small, its influence on the vibration direction is small and can be ignored). If the vibration direction of one group of excitation devices is set as the X-direction, then the vibration direction of the other group of excitation devices is the Y-direction.

[0030] When it is necessary to vibrate the Z-axis of the platform 2, the axis of the mounting base 54 is rotated to be perpendicular to the axis of the base 51 by rotating the second deformable seat 53. Then, the angle of the eccentric mechanism 6 is adjusted by rotating the first deformable seat 53 so that the two eccentric mechanisms 6 in the same group are located in the same plane, so that the forces of the two eccentric mechanisms 6 in the non-perpendicular direction can cancel each other out. The resultant force applied to the platform 2 by the two is in the vertical direction, thereby achieving Z-axis excitation of the platform 2.

[0031] The angle between the axis of the mounting base 54 and the axis of the base 51 can be adjusted to between 90° and 180° to achieve mixed excitation of the platform 2.

[0032] To facilitate assembly and ensure the structural stability of the vibration mechanism 5, a connecting ring I524 is fixedly installed on the straight segment I521 of the first deformable seat 52, and an mounting ring I511 is fixedly installed on the base 51. A clamp I512 is installed outside the base 51. The inner side of the clamp I512 has a first annular groove 5121 that is fixedly connected to the mounting ring I511 and a second annular groove 5122 that rotatably engages with the connecting ring I524. The clamp I512 connects the first deformable seat 52 and the base 51, and the first deformable seat 52 can rotate relative to the base 51.

[0033] Similarly, an installation ring II525 is fixedly installed on the straight segment II523 of the first deformable seat 52, and a connecting ring II531 is fixedly installed on the straight segment I521 of the second deformable seat 53. A clamp II526 is provided on the outside of the first deformable seat 52. The inner side of the clamp II526 is provided with a third annular groove that is fixedly connected to the installation ring II525 and a fourth annular groove that is rotatably engaged with the connecting ring II531, so that the second deformable seat 53 can rotate relative to the first deformable seat 52.

[0034] In order to drive the rotation of the first deformable seat 52 and the second deformable seat 53, a first angle control mechanism 55 for driving the first deformable seat 52 to rotate relative to the base 51 and a second angle control mechanism 56 for driving the second deformable seat 53 to rotate relative to the first deformable seat 52 are also included.

[0035] Specifically, the first angle control mechanism 55 includes a synchronous belt I 551 and a control rod I 552 rotatably mounted within the base 51. The control rod I 552 is fixedly connected to the first deformable seat 52. A synchronous pulley I 553, rotating synchronously with the control rod I 552, is mounted on the control rod I 552. The two ends of the synchronous belt I 551 are located within the two bases 51 of the same group of excitation devices 5 and mesh with the corresponding synchronous pulleys I 553. When the synchronous belt I 551 rotates, it drives the two synchronous pulleys I 553 to rotate synchronously, which in turn drives the corresponding first deformable seat 52 to rotate via the control rod I 552.

[0036] The lower end of the platform 2 is equipped with a drive pulley I554 that meshes with the synchronous belt I551. A stop block 555 is provided on the side of the synchronous belt I551 away from the drive pulley I554. The stop block 555 ensures reliable meshing between the drive pulley I554 and the synchronous belt I55, preventing tooth skipping. The drive pulley I554 is connected to a reducer 556 and an angle control motor I557. Preferably, the angle control motor I557 is a servo motor or a stepper motor.

[0037] The second angle control mechanism 56 includes an angle control motor II 561 and a planetary gear reducer 562. The gear ring of the planetary gear reducer 562 is mounted on the first deformable seat 52, and the planet carrier of the planetary gear reducer 562 is connected to the second deformable seat 53. The angle control motor II 561 is mounted on the first deformable seat 52, and the motor shaft of the angle control motor II 561 is connected to the central gear of the planetary gear reducer 562. The angle control motor II 561 and the planetary gear reducer 562 drive the second deformable seat 53 to rotate. The angle control motor II 561 can be a servo motor or a stepper motor.

[0038] To prevent the angles between the base 51, the first deformable seat 52, and the second deformable seat 53 from changing during operation of the vibration table, locking mechanisms 7 are provided between the first deformable seat 52 and the base 51, and between the second deformable seat 53 and the first deformable seat 52.

[0039] Specifically, the locking mechanism 7 includes a positioning gear ring 71 and a positioning ring 72. The positioning gear ring 71 and the positioning ring 72 are respectively fixedly connected to two rotatingly mating parts (the two rotatingly mating parts refer to the base 51 and the first deformable seat 52, or the first deformable seat 52 and the second deformable seat 53). Two electric push rods 73 are symmetrically arranged on the positioning ring 72. The working end of the electric push rod 73 is connected to a tooth 74. When the electric push rod 73 extends, the tooth 74 inserts into the tooth groove of the positioning gear ring 71 and locks the positioning gear ring 71 and the positioning ring 72. This achieves the locking of the two rotatingly mating parts.

[0040] When the vibration table is working, a sand box positioning device 4 is provided on the upper end of the platform 2 to position and clamp the sand box on the platform 2. The sand box positioning device 4 includes a positioning rod 41 and a positioning block 42. The positioning rod 41 is fixedly set on the platform 2. The positioning block 42 includes a fixed block 421 and a sliding block 422. The fixed block 421 is fixedly connected to the bottom of the sand box. The sliding block 422 is slidably set on the fixed block 421 in the vertical direction and is limited in the upper and lower directions by the fixed block 421. Specifically, the fixed block 421 is provided with a sliding hole. The middle part of the sliding block 422 is slidably set on the sliding hole. The upper and lower ends of the sliding block 422 are respectively provided with an upper limit block and a lower limit block that cooperate with the fixed block 421.

[0041] A pressure block 423 is fixedly installed on the outer side of the sliding block 422. The lower end of the pressure block 423 has an insertion hole 424 that mates with the positioning rod 41. When the sand box moves to the point where the positioning rod 41 aligns with the insertion hole 424, the sliding block 422 and the pressure block 423 move downwards under gravity, causing the positioning rod 41 to insert into the insertion hole 424, thus achieving the positioning of the sand box. The front end of the pressure block 423 has a guide groove 425 that communicates with the insertion hole 424. The guide groove 425 guides the positioning rod 41 into the lower end of the pressure block 423 and ultimately into the insertion hole 424, preventing the positioning rod 41 from colliding with the side of the pressure block 423.

[0042] Once the sandbox reaches the designated position, to prevent it from moving, the sandbox positioning device 4 also includes a column 43 and a sliding pressure rod 44. The column 43 is fixedly mounted on the platform 2, and the sliding pressure rod 44 is slidably mounted on the column 43 in the horizontal direction. A hydraulic cylinder I 45 is mounted on the column 43 to drive the sliding pressure rod 44 to move. One end of the sliding pressure rod 44 is provided with a lower inclined surface, and the pressure block 423 is provided with an upper inclined surface that cooperates with the lower inclined surface. The hydraulic cylinder I 45 drives the sliding pressure rod 44 to move towards the pressure block 423 until the lower inclined surface cooperates with the upper inclined surface and presses the pressure block 423 tightly.

[0043] In order to release the positioning rod 41 from limiting the pressure block 423 after the vibration table has finished working, a guide groove 426 is provided on the side of the pressure block 423, and an elastic rod 441 that cooperates with the guide groove 426 is provided on the sliding pressure rod 44. The inlet section 4261 of the guide groove 426 is higher than the outlet section 4262. When the positioning rod 41 is inserted into the socket 424 and the sliding pressure rod 44 is not in contact with the pressure block 423, the elastic rod 441 is at the same height as the inlet section 4261, so that when the sliding pressure rod 44 moves towards the pressure block 423, the elastic rod 441 can be inserted into the guide groove 426; when the sliding pressure rod 44 moves away from the pressure block 423, the elastic rod 441 enters the outlet section 4262 of the guide groove 426. Since the outlet section 4262 is lower than the inlet section 4261, under the elastic force of the elastic rod 441, the pressure block 423 is raised to a certain height, so that the positioning rod 41 leaves the socket 424, and the positioning rod 41 is released from the socket 424.

[0044] In the above solution, the sand box is pressed by the sliding pressure rod 44 and the pressure block 423, which will cause the bottom wheel of the sand box to bear a large force, affecting the life of the bottom wheel. In order to solve this problem, the sand box positioning device 4 also includes a top support mechanism 46. Before the positioning rod 41 fully presses the pressure block 423, the top support mechanism 46 raises the sand box to a certain height, reducing the force on the bottom wheel of the sand box during vibration.

[0045] Specifically, the top support mechanism 46 includes a top support base 461, top support blocks 462, and a top support plate 463. The top support base 461 is fixedly installed in the middle of the platform 2. Two top support blocks 462 are provided and slidably installed on the top support base 461 respectively. Both top support blocks 462 are connected to racks, and the two racks mesh with the same control gear 464 and are symmetrical about the center of the control gear 464, so that the two top support blocks 462 can move synchronously in opposite directions. One of the top support blocks 462 is connected to a hydraulic cylinder II 465, which drives the top support block 462 to move.

[0046] The top support block 462 has an inclined surface at its upper end, and the top support plate 463 is slidably mounted on the top support seat 461 in a vertical direction. The lower end of the top support plate 463 is provided with an inclined block that cooperates with the top support block 462. When the two top support blocks 462 approach each other, they push the top support plate 463 to move upward, thereby pushing the sand box upward through the top support plate 463.

[0047] A triaxial vibration sensor 8 is installed on the upper end of the shelf 2 to monitor the vibration data of the shelf 2 in three directions.

[0048] The above description only illustrates the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A lost foam vibrating table, comprising a base (1) and a platform (2), wherein the base (1) and the platform (2) are connected by an air spring (3), characterized in that: The upper end of the platform (2) is provided with a sand box positioning device (4); the lower end of the platform (2) is provided with two sets of excitation devices, each set of excitation devices including two excitation mechanisms (5) with the same structure and symmetrical about the center of the platform. The excitation mechanism (5) includes a base (51), a first deformable seat (52), a second deformable seat (53), and a mounting seat (54). The base (51) is fixedly connected to the lower end face of the platform (2). The two ends of the first deformable seat (52) are rotatably connected to the base (51) and the second deformable seat (53) respectively. The mounting seat (54) is fixedly connected to the second deformable seat. An eccentric mechanism (6) is rotatably arranged inside the mounting seat (54). An eccentric motor (61) is connected to the eccentric mechanism (6). It also includes a first angle control mechanism (55) for driving the first deformable seat (52) to rotate relative to the base (51) and a second angle control mechanism (56) for driving the second deformable seat (53) to rotate relative to the first deformable seat (52); the included angle between the end faces of the first deformable seat (52) and the second deformable seat (53) is 45°.

2. The lost foam vibrating table according to claim 1, characterized in that: The first deformable seat (52) and the second deformable seat (53) each include a straight segment I (521), a curved segment (522) and a straight segment II (523) arranged in sequence in an integral structure. A connecting ring I (524) is fixedly provided on the straight segment I (521) of the first deformable seat (52). An installation ring I (511) is fixedly provided on the base (51). A clamp I (512) is provided outside the base (51). A first ring groove (5121) fixedly connected to the installation ring I (511) and a second ring groove (5122) rotatably engaged with the connecting ring I (524) are provided on the inner side of the clamp I (512). The first angle control mechanism (55) includes a synchronous belt I (551) and a control rod I (552) rotatably disposed in the base (51). The control rod I (552) is fixedly connected to the first deformable seat (52). A synchronous pulley I (553) is provided on the control rod I (552) and rotates synchronously with the control rod I (552). The two ends of the synchronous belt I (551) are respectively located in the two bases (51) of the same group of excitation devices (5) and mesh with the corresponding synchronous pulley I (553). The lower end of the platform (2) is provided with a drive pulley I (554) meshing with the synchronous belt I (551). A stop block (555) is provided on the side of the synchronous belt I (551) away from the drive pulley I (554). The drive pulley I (554) is connected to a reducer (556) and an angle control motor I (557).

3. The lost foam vibrating table according to claim 2, characterized in that: An installation ring II (525) is fixedly provided on the straight segment II (523) of the first deformable seat (52), a connecting ring II (531) is fixedly provided on the straight segment I (521) of the second deformable seat (53), a clamp II (526) is provided on the outside of the first deformable seat (52), and a third ring groove fixedly connected to the installation ring II (525) and a fourth ring groove rotatably engaged with the connecting ring II (531) are provided on the inner side of the clamp II (526); The second angle control mechanism (56) includes an angle control motor II (561) and a planetary gear reducer (562). The gear ring of the planetary gear reducer (562) is mounted on the first deformable seat (52), and the planet carrier of the planetary gear reducer (562) is connected to the second deformable seat (53). The angle control motor II (561) is mounted on the first deformable seat (52), and the motor shaft of the angle control motor II (561) is connected to the center wheel of the planetary gear reducer (562).

4. A lost foam vibrating table according to claim 2 or 3, characterized in that: Locking mechanisms (7) are provided between the first deformable seat (52) and the base (51) and between the second deformable seat (53) and the first deformable seat (52). The locking mechanism (7) includes a positioning gear ring (71) and a positioning ring (72). The positioning gear ring (71) and the positioning ring (72) are respectively fixedly connected to two rotating parts. Two electric push rods (73) are symmetrically arranged on the positioning ring (72). The working end of the electric push rod (73) is connected to a tooth (74). When the electric push rod (73) extends, the tooth (74) is inserted into the tooth groove of the positioning gear ring (71) and locks the positioning gear ring (71) and the positioning ring (72).

5. A lost foam vibrating table according to claim 1, characterized in that: The upper end of the platform (2) is provided with a track (21) that cooperates with the bottom wheel of the sand box. The sand box positioning device (4) includes a positioning rod (41) and a positioning block (42). The positioning rod (41) is fixedly set on the platform (2). The positioning block (42) includes a fixed block (421) and a sliding block (422). The fixed block (421) is fixedly connected to the bottom of the sand box. The sliding block (422) is slidably set on the fixed block (421) in the vertical direction and is limited in the upper and lower positions by the fixed block (421). A pressure block (423) is fixedly provided on the outside of the sliding block (422). The lower end of the pressure block (423) is provided with an insertion hole (424) that cooperates with the positioning rod (41). The front end of the pressure block (423) is provided with a guide groove (425) that communicates with the insertion hole (424).

6. A lost foam vibrating table according to claim 5, characterized in that: The sand box positioning device (4) also includes a column (43) and a sliding pressure rod (44). The column (43) is fixedly installed on the platform (2), and the sliding pressure rod (44) is slidably installed on the column (43) in the horizontal direction. A hydraulic cylinder I (45) for driving the sliding pressure rod (44) to move is provided on the column (43). One end of the sliding pressure rod (44) is provided with a lower inclined surface, and the pressure block (423) is provided with an upper inclined surface that cooperates with the lower inclined surface.

7. A lost foam vibrating table according to claim 6, characterized in that: The pressure block (423) has a guide groove (426) on its side, and the sliding pressure rod (44) has an elastic rod (441) that cooperates with the guide groove (426). The inlet section (4261) of the guide groove (426) is higher than the outlet section (4262). When the elastic rod (441) is located at the outlet section (4262), the positioning rod (41) and the insertion hole (424) are released from the limit.

8. A lost foam vibrating table according to claim 5, characterized in that: The sand box positioning device (4) further includes a top support mechanism (46), which includes a top support seat (461), a top support block (462), and a top support plate (463). The top support seat (461) is fixedly installed in the middle of the platform (2). There are two top support blocks (462) which are slidably installed on the top support seat (461) respectively. The upper end of the top support block (462) is an inclined surface. The top support plate (463) is slidably installed on the top support seat (461) in the vertical direction. The lower end of the top support plate (463) is provided with an inclined block that cooperates with the top support block (462). Both top support blocks (462) are connected to racks, and the two racks mesh with the same control gear (464) and are symmetrical about the center of the control gear (464). One of the top support blocks (462) is connected to a hydraulic cylinder II (465).

9. A lost foam vibrating table according to claim 1, characterized in that: The lower end of the platform (2) is provided with a pre-embedded bolt (22), and a flange (513) that mates with the pre-embedded bolt (22) is fixedly provided on the base (51).

10. A lost foam vibrating table according to claim 1, characterized in that: A triaxial vibration sensor (8) is installed on the upper end of the platform (2).

Images