A vibrating table for coated sand molding line

Abstract

The application discloses a vibrating table for coated sand molding line, and relates to the field of casting, which aims to solve the problems of the existing vibrating table, such as the poor filling of iron in the mold box, the poor clamping reliability of the mold box, the unstable vibration of the mold box, the unstable casting quality and the low production safety, and comprises a moving frame, a regulating frame hinged to the moving frame, a supporting table fixedly connected to the regulating frame, a guide groove and an embedded groove arranged on the supporting table, a guide roller rotatably connected to the guide groove, a vibrating plate slidably connected to the embedded groove, a through groove formed in the vibrating plate, a limiting frame arranged on the side of the vibrating plate, two clamping blocks slidably connected to the two sides of the regulating frame, a baffle synchronously moving and arranged in the middle of the two clamping blocks, a buffer assembly slidably connected to the clamping block and matched with the vibrating plate, and the baffle is hinged to the regulating frame. The common cooperation of the regulating frame, the vibrating plate and the clamping block improves the clamping stability, simultaneously adapts to different vibrating requirements, and effectively improves the casting quality.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and in particular to a vibratory compaction table for a coated sand molding line. Background Technology

[0002] Sand molding, a crucial step in the casting process, relies on thermoplastic phenolic resin-coated sand that is heated and cured to form the mold or core. Its structural strength and collapsibility directly affect the quality of the casting. At the pouring station of the sand molding line, when high-temperature molten iron is poured into the sand mold, the inherently insufficient permeability of the coated sand, coupled with the complex and varied cavity structure, causes the molten iron to easily stagnate in thin-walled areas, sharp corners, and deep cavities, resulting in defects such as incomplete filling, cold shuts, or porosity. Once these defects solidify in the casting, they will cause internal voids or surface defects, leading to batch scrap and severely restricting production efficiency and cost control.

[0003] To alleviate this problem, the industry commonly uses vibratory compaction tables to apply mechanical vibration during the pouring stage. The excitation force generated by the vibratory motor enhances the fluidity of the molten iron, causing air bubbles to detach from the mold wall and rise to the surface, thereby improving the density and clarity of the casting. However, vibratory compaction tables currently face a dual dilemma in actual operation: Firstly, during the pouring process, the angle of the mold box on the vibratory compaction table is fixed. As the molten iron flows under dynamic gravity, the flow slows down in the thin-walled area connecting the two cavities, affecting the pouring speed and increasing the residence time of the molten iron inside. This leads to reduced fluidity, cold shuts, and incomplete filling. Secondly, the reliability of the mold box clamping system is severely inadequate. After pouring, the mold box must be absolutely fixed; any slight displacement or tilt can cause sand mold misalignment or even molten iron leakage, resulting in safety accidents. Existing clamping mechanisms mostly rely on mechanical structures such as bolts, pressure plates, or pins. Under continuous high-frequency vibration and impact, threaded connections wear and loosen rapidly, and the locking force continuously diminishes. Even with pneumatic or hydraulic clamping, pipe joints are prone to fatigue cracking or sealing failure under alternating stress, and sudden pressure drops can lead to clamping failure. After the clamping loosens, a gap forms between the mold box and the vibration table, and the vibration energy is absorbed and dissipated by the gap, failing to be effectively transmitted to the inside of the sand mold. This not only exacerbates defects in molten iron filling but also amplifies the risk of residual air bubbles. These problems combine to make it difficult for existing vibration tables to achieve a stable improvement in the internal quality of castings while ensuring production safety. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a vibratory table for a coated sand molding line. This design effectively solves the problems of incomplete filling of molten iron in the mold box, poor clamping reliability of the mold box, and unstable vibration of the mold box in the existing vibratory table, which lead to unstable casting quality and low production safety.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a movable frame, an adjusting frame hinged to the movable frame, a support platform fixedly connected to the adjusting frame, a guide groove and an inner groove provided on the support platform, a guide roller rotatably connected in the guide groove, a vibrating plate slidably connected in the inner groove, a through groove for the guide roller to pass through on the vibrating plate, a limiting frame provided on the side of the vibrating plate, the limiting frame slidably connected to the adjusting frame, two relatively movable clamping blocks slidably connected on both sides of the adjusting frame, a synchronously moving baffle provided in the middle of the two clamping blocks, a buffer assembly cooperating with the vibrating plate slidably connected to the clamping blocks, and the baffle hinged to the adjusting frame; An elastic pressure rod is fixedly connected to the bottom of the vibrating plate, and the elastic pressure rod exerts a downward force on the vibrating plate. The top of the guide roller is higher than the top surface of the vibrating plate, and a lifting platform is installed between the vibrating plate and the adjusting frame.

[0006] Preferably, the adjusting frame is fixedly connected to multiple sets of side support plates, the lifting platform and the elastic pressure rod are both located on the side support plates, the elastic pressure rod includes a support rod, the side support plate is provided with a guide hole for the support rod to slide, a limiting piece is fixedly connected below the support rod, and a first spring is sleeved on the support rod between the limiting piece and the side support plate.

[0007] Preferably, a straight vibrator is fixedly connected around the perimeter of the vibrating plate, and an elastic pad is fixedly connected between the vibrating plate and the lifting platform.

[0008] Preferably, the bottom of the movable frame is slidably connected to a first slide rail, the rear end of the movable frame is fixedly connected to a column, the column is hinged to the adjusting frame, and the front end of the movable frame is hinged to a first telescopic rod, which is hinged to the adjusting frame.

[0009] Preferably, the bottom of the limiting frame is slidably connected to a second slide rail, the second slide rail is fixedly connected to the adjusting frame, and both the first slide rail and the second slide rail are electromagnetic tracks.

[0010] Preferably, the front end of the limiting frame is fixedly connected to a forward-protruding buffer plate, and the buffer plate has ventilation holes.

[0011] Preferably, the buffer assembly includes a pressure-bearing block, the clamping block is provided with a sliding groove for the pressure-bearing block to slide, the sliding groove is fixedly connected with a guide rod, and a second spring is provided in the sliding groove on both the upper and lower sides of the pressure-bearing block, and the side of the pressure-bearing block protrudes out of the outer side of the pressure block.

[0012] Preferably, both sets of clamping blocks are L-shaped structures, and a guide sleeve for sliding of the clamping blocks is fixedly connected to the adjusting frame. A first connecting rod is hinged to the inner side of both sets of clamping blocks, and a second telescopic rod is hinged to both sets of first connecting rods. The second telescopic rod is slidably connected to the adjusting frame.

[0013] Preferably, the end of the second telescopic rod is hinged to a second connecting rod, the second connecting rod is hinged to the baffle, and the baffle is a triangular prism structure.

[0014] Compared with the prior art, the outstanding advantages of this invention are: This invention achieves stable clamping of the mold box by setting a sliding vibrating plate in conjunction with relatively movable clamping blocks and baffles, avoiding displacement and loosening of the mold box during vibration. At the same time, the position of the vibrating plate can be adjusted by the lifting platform to regulate the contact state between the vibrating plate and the mold box, adapting to the vibration requirements of different stages of molten iron filling, improving the efficiency of bubble removal, and reducing casting defects.

[0015] This application includes a buffer assembly installed on the clamping block. The buffer assembly reduces the impact of mold box vibration on the clamping block, ensuring the reliability and stability of the clamping block in clamping the mold box, and improving the compaction effect of the mold box and the quality of the casting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the left-side structure of the mobile frame of the present invention.

[0018] Figure 3 This is a schematic diagram of the adjustment frame connection structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the support platform connection structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the limiting frame structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the side support plate connection structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the left-side structure of the vibration plate of the present invention.

[0023] Figure 8 This is an exploded structural diagram of the vibration plate and support platform of the present invention.

[0024] Figure 9 This is a schematic diagram of the bottom structure of the adjustment frame of the present invention.

[0025] Figure 10 This is a schematic diagram of the clamping block connection structure of the present invention.

[0026] Figure 11 This is a schematic diagram of the buffer component structure of the present invention.

[0027] The following are the labeling elements in the diagram: 1. Moving frame; 2. Adjusting frame; 3. Support platform; 4. Guide groove; 5. Embedded groove; 6. Guide roller; 7. Vibrating plate; 8. Through groove; 9. Limiting frame; 10. Clamping block; 11. Baffle; 12. Buffer assembly; 1201. Pressure block; 1202. Slide groove; 1203. Guide rod; 1204. Second spring; 13. Elastic pressure rod; 1301. Support rod; 1302. Limiting piece; 1303. First spring; 14. Lifting platform; 15. Side support plate; 16. Guide hole; 17. Straight vibrator; 18. Elastic pad; 19. First slide rail; 20. Column; 21. First telescopic rod; 22. Second slide rail; 23. Buffer plate; 24. Ventilation hole; 25. Guide sleeve; 26. First connecting rod; 27. Second telescopic rod; 28. Second connecting rod. Detailed Implementation

[0028] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Please see the appendix Figure 1-11 This embodiment provides a vibratory table for a coated sand molding line, comprising a movable frame 1, an adjusting frame 2 hinged to the movable frame 1, a support platform 3 fixedly connected to the adjusting frame 2, a guide groove 4 and an inner groove 5 on the support platform 3, a guide roller 6 rotatably connected in the guide groove 4, a vibrating plate 7 slidably connected in the inner groove 5, a through groove 8 on the vibrating plate 7 for the guide roller 6 to pass through, a limiting frame 9 on the side of the vibrating plate 7, the limiting frame 9 being slidably connected to the adjusting frame 2, two relatively movable clamping blocks 10 slidably connected on both sides of the adjusting frame 2, a synchronously moving baffle 11 provided in the middle of the two clamping blocks 10, a buffer assembly 12 that cooperates with the vibrating plate 7 being slidably connected to the clamping blocks 10, and the baffle 11 being hinged to the adjusting frame 2.

[0030] The movable frame 1, serving as the main load-bearing structure of the equipment, is equipped with wheels or sliders at its bottom for manual movement or movement via an external traction device on the production line. The adjusting frame 2 is hinged to the movable frame 1, for example, via a pin or pivot, allowing the adjusting frame 2 to swing or tilt relative to the movable frame 1 at a certain angle. The support platform 3 is directly and fixedly connected to the adjusting frame 2, for example, via bolts or welding, ensuring that it forms a stable integral unit with the adjusting frame 2.

[0031] The support platform 3 is provided with a guide groove 4 and an inner groove 5. The guide groove 4 can be designed with a U-shaped or V-shaped cross section to accommodate the guide roller 6. The inner groove 5 is a rectangular recess whose size matches the bottom shape of the vibrating plate 7 so that the vibrating plate 7 can be completely housed inside it.

[0032] A guide roller 6 is rotatably connected within the guide groove 4. The guide roller 6 is a cylindrical component that is mounted within the guide groove 4 via bearings or bushings, allowing it to rotate freely. The guide roller 6 is made of a wear-resistant material to reduce friction between the mold box and the support platform 3.

[0033] A vibrating plate 7 is vertically slidably connected inside the embedded groove 5. The vibrating plate 7 is a flat plate structure whose bottom fits the shape of the embedded groove 5. In the initial state, it is completely located inside the embedded groove 5 and does not affect the movement of the mold box on the support platform 3.

[0034] The vibrating plate 7 has a through groove 8 for the guide roller 6 to pass through. The shape and size of the through groove 8 should match the shape of the guide roller 6 to ensure that the guide roller 6 can pass smoothly through the through groove 8 when the vibrating plate 7 slides, ensuring that there is no interference between the two, and avoiding excessive gaps that would affect the stability of the vibrating plate 7.

[0035] A limiting frame 9 is provided on the side of the vibrating plate 7, and the limiting frame 9 is slidably connected to the adjusting frame 2. The limiting frame 9 is an I-shaped support. By setting a slider on the limiting frame 9 and making the slider cooperate with the corresponding slide rail on the adjusting frame 2, the sliding connection of the limiting frame 9 is realized. When the mold box moves to the support platform 3, the limiting frame 9 limits the inward movement of the mold box. When the mold box moves out of the support platform 3, the limiting frame 9 acts as a power source to apply an outward thrust.

[0036] The adjusting frame 2 has two relatively movable clamping blocks 10 slidably connected on both sides. Both clamping blocks 10 have flat inner surfaces for contacting the sides of the mold box. The sliding of the clamping blocks 10 can be achieved by setting guide rails on the adjusting frame 2 and installing sliders on the clamping blocks 10. The relative movement of the clamping blocks 10 can be driven by a manual screw mechanism or a linkage mechanism.

[0037] A synchronously moving baffle 11 is provided in the middle of the two clamping blocks 10, and the baffle 11 is hinged to the adjusting frame 2. The baffle 11 is a triangular prism, which is connected to the clamping blocks 10 through a linkage mechanism, so that it moves synchronously when the clamping blocks 10 move. The hinge between the baffle 11 and the adjusting frame 2 can be realized by a pin, allowing the baffle 11 to swing within a certain range. While the clamping blocks 10 clamp the two sides of the mold box, the baffle 11 limits and blocks the outside of the mold box. The two clamping blocks 10, the limiting frame 9 and the baffle 11 work together to achieve positioning of the mold box around its perimeter.

[0038] The clamping block 10 is slidably connected to a buffer assembly 12 that cooperates with the vibrating plate 7. The buffer assembly 12 can slide longitudinally on the clamping block 10 and is installed on the inner side of the clamping block 10. When the clamping block 10 clamps the mold box, the buffer assembly 12 can come into contact with the mold box. When the vibrating plate 7 is working, it provides a buffering effect to the clamping block 10 as the mold box moves vertically, so that the slider can counteract the vertical vibration and ensure the force exerted by the clamping block 10 on the inner side.

[0039] An elastic pressure rod 13 is fixedly connected to the lower part of the vibrating plate 7, and the elastic pressure rod 13 exerts a downward force on the vibrating plate 7. The elastic pressure rod 13 can be a simple helical spring, with one end fixed to the lower part of the vibrating plate 7 and the other end abutting against the fixed structure of the adjusting frame 2 or the support platform 3, thereby applying continuous downward pressure to the vibrating plate 7.

[0040] The top of the guide roller 6 is higher than the top surface of the vibrating plate 7. This height relationship ensures that the guide roller 6 can play an effective guiding role during the sliding of the vibrating plate 7, and may provide support for the bottom of the mold box during certain operating phases.

[0041] A lifting platform 14 is installed between the vibrating plate 7 and the adjusting frame 2. The lifting platform 14 is a platform driven by a hydraulic cylinder or screw, with its bottom fixed on the adjusting frame 2 and its top connected to the bottom of the vibrating plate 7. The vertical lifting of the vibrating plate 7 is achieved through a driving mechanism.

[0042] The following is a more specific example to illustrate the above technical solution in greater detail: Suppose that on a coated sand molding line, a newly prepared sand mold box needs to be vibrated to ensure that the casting after molten iron is poured is dense and free of porosity. The mold box is first transported to the area above the vibrating table.

[0043] At this point, the movable frame 1 of the vibrating table is positioned below the pouring station. The adjusting frame 2, hinged to the movable frame 1, can be initially adjusted in angle or position according to the size of the mold box or pouring requirements, thus placing the support platform 3 in a suitable working posture. Furthermore, during the pouring process, the adjusting frame 2 reciprocates at a certain angle around the mold box, ensuring the integrity of the inner cavity while allowing the molten iron to fully fill the cavity. The support platform 3 serves as the bearing base for the vibrating plate 7, and its guide groove 4 and embedded groove 5 are already in place.

[0044] The mold box is placed above the vibrating plate 7. The vibrating plate 7 ensures its freedom of movement in the horizontal direction through its sliding connection within the inner groove 5 and the rotational connection of the guide roller 6 within the guide groove 4. A through slot 8 on the vibrating plate 7 allows the guide roller 6 to pass through, which helps the vibrating plate 7 remain stable during sliding and provides auxiliary support from the guide roller 6. To ensure the mold box does not shift during vibration, it needs to be reliably clamped. Two relatively movable clamping blocks 10 on both sides of the adjusting frame 2 begin to move inward, applying clamping force to the sides of the mold box. A synchronously moving baffle 11 is provided in the middle of the clamping block 10. The baffle 11 is hinged to the adjusting frame 2; as the clamping block 10 moves, the baffle 11 also moves synchronously, further assisting in the positioning and support of the mold box. A buffer assembly 12, such as an elastic pad 18, slidably connected to the clamping block 10 contacts the mold box during clamping, providing a buffering effect for the clamping block 10, preventing damage to the connecting parts of the clamping block 10 from hard impacts, and ensuring uniform transmission of the clamping force. The limiting frame 9 is set on the side of the vibrating plate 7 and is slidably connected to the adjusting frame 2. Its function is to limit the lateral movement of the vibrating plate 7 and ensure that the vibrating plate 7 can still vibrate as expected when it is clamped.

[0045] After the mold box is securely clamped, the lifting platform 14 below the vibrating plate 7 begins to function. The lifting platform 14 rises upward so that the vibrating plate 7 comes into contact with the bottom of the mold box, and lifts the mold box upward to the height away from the guide roller 6. The first spring 1303 inside the elastic pressure rod 13 is compressed upward, and the vibrating plate 7 maintains close contact with the bottom of the mold box, ensuring that the vibration energy can be efficiently transferred from the vibrating plate 7 to the mold box and the molten iron inside.

[0046] Furthermore, the lifting platform 14 can adjust the vertical height of the vibrating plate 7 as needed. For example, in the initial stage of pouring, it may be necessary to raise the vibrating plate 7 to a specific height to optimize the initial filling of molten iron; in the later stage of pouring, it may be necessary to adjust the height to adapt to changes in the molten iron level, or to adjust the contact state between the vibrating plate 7 and the mold box to optimize the vibration effect. Through the adjustment of the lifting platform 14, precise control of the vibration position of the mold box can be achieved.

[0047] When molten iron is poured, the vibrating plate 7 is driven to vibrate. Because the mold box is firmly clamped by the clamping block 10 and the baffle 11, and the vibrating plate 7 is in close contact with the mold box via the elastic pressure rod 13, the vibration energy can be effectively transferred to the molten iron inside the mold box. Vibration gives the molten iron additional kinetic energy within the cavity, improving its fluidity and allowing it to better fill hard-to-reach areas such as thin walls, sharp corners, and complex internal cavities, thus solving the problem of incomplete filling. Simultaneously, vibration promotes the aggregation and upward discharge of air bubbles inside the molten iron, effectively reducing porosity defects inside the casting. Throughout the process, the limiting frame 9 ensures a stable vibration path for the vibrating plate 7, avoiding unnecessary lateral swaying.

[0048] In this design, the vibrating plate 7 slides within the embedded groove 5 and is rotated and guided by the guide roller 6 within the guide groove 4, ensuring a stable movement path for the vibrating plate 7. More importantly, the elastic pressure rod 13 fixedly connected below the vibrating plate 7 applies a downward force to the vibrating plate 7, allowing it to contact the bottom of the mold box when needed and disengage when not. The lifting platform 14 allows the height of the vibrating plate 7 to be precisely adjusted according to actual needs, further optimizing the contact state between the vibrating plate 7 and the mold box, and improving the adaptability and effectiveness of the compaction effect.

[0049] The side of the adjustment frame 2 is fixedly connected to multiple sets of side support plates 15. The lifting platform 14 and the elastic pressure rod 13 are both located on the side support plate 15. The elastic pressure rod 13 includes a support rod 1301. The side support plate 15 is provided with a guide hole 16 for the support rod 1301 to slide. A limit piece 1302 is fixedly connected below the support rod 1301. A first spring 1303 is sleeved on the support rod 1301 between the limit piece 1302 and the side support plate.

[0050] By fixing multiple sets of side support plates 15 to the sides of the adjusting frame 2, a unified and stable mounting platform is provided for the lifting platform 14 and the elastic pressure bar 13. The support rod 1301 of the elastic pressure bar 13 is precisely guided in the guide hole 16 on the side support plate 15, ensuring the accuracy of its vertical movement, thereby ensuring that the downward force applied by the elastic pressure bar 13 to the vibrating plate 7 remains stable and vertical. The first spring 1303, which is sleeved between the limiting plate 1302 below the support rod 1301 and the side support plate 15, provides continuous and controllable elastic pressure. This structural design enables the elastic pressure bar 13 to work stably during vibration, effectively avoiding uneven force caused by lateral swaying or mechanical deviation. At the same time, since the lifting platform 14 is also firmly mounted on these side support plates 15, the structural integrity and stability of the entire vibration compaction system are significantly improved, ensuring precise control and reliable operation of the vibrating plate 7 during lifting and compaction.

[0051] The following is a specific example. Two 10mm thick steel plates can be welded to the left and right sides of the adjusting frame 2 as side support plates 15 to provide robust support. The base of the lifting platform 14 can be bolted to the lower part of these side support plates 15, while the support rod 1301 of the elastic pressure rod 13 passes through the guide hole 16 pre-drilled in the upper part of the side support plate 15. The support rod 1301 can be made of precision-ground stainless steel with a diameter of 25mm. A bronze self-lubricating bushing is embedded in the guide hole 16 to ensure smooth sliding of the support rod 1301 within the bushing, reducing friction and wear. The bottom of the support rod 1301 is threaded to a 60mm diameter circular flange as a limiting plate 1302. A high-strength compression spring, as the first spring 1303, is sleeved on the support rod 1301, with its upper end abutting against the lower surface of the side support plate 15 and its lower end abutting against the flange limiting plate 1302, thereby applying a preset downward pressure to the vibrating plate 7.

[0052] A straight vibrator 17 is fixedly connected around the vibrating plate 7, and an elastic pad 18 is fixedly connected between the vibrating plate 7 and the lifting platform 14.

[0053] The direct vibration generator 17 is a device capable of generating mechanical vibration, its function being to apply continuous and controllable vibration energy to the vibrating plate 7. The direct vibration generator 17 can be implemented in various forms; for example, an electromagnetic direct vibration generator 17 can be used, driving the vibrating element to generate high-frequency vibration through electromagnetic force; alternatively, an eccentric block direct vibration generator 17 can be used, where a motor drives the eccentric block to rotate at high speed, generating centrifugal force to drive the vibrating plate 7 to vibrate. The direct vibration generator 17 is designed to provide an active and powerful vibration source for the compaction process. The elastic pad 18 is a material component with good elasticity and cushioning properties, its main function being to provide cushioning and vibration isolation between the vibrating plate 7 and the lifting platform 14. The elastic pad 18 can be made of various elastic materials; for example, it can be made of highly wear-resistant and highly elastic rubber materials, such as nitrile rubber or polyurethane rubber; or it can be made of composite materials to provide better damping performance. The elastic pad 18 helps absorb the impact and high-frequency vibration generated by the vibrating plate 7, reducing direct impact on the lifting platform 14 and optimizing the transmission of vibration energy.

[0054] By fixing vertical vibrators 17 around the perimeter of the vibrating plate 7, the vibrating plate 7 receives active and powerful vibration energy. These vertical vibrators 17 work together to ensure uniform and efficient vibration across the entire surface of the vibrating plate 7, thereby effectively promoting the compaction and uniform filling of the coated sand. Simultaneously, elastic pads 18 are fixedly connected between the vibrating plate 7 and the lifting platform 14. These elastic pads 18 act as buffering media, absorbing the impact and high-frequency energy generated by the vibrating plate 7 during vibration, effectively isolating the rigid connection between the vibrating plate 7 and the lifting platform 14. This arrangement not only protects the lifting platform 14 and related supporting structures from excessive vibration and impact, extending the service life of the equipment, but also optimizes the transfer of vibration energy to the coated sand, avoiding unnecessary energy loss in structural components, thereby improving compaction efficiency and effectiveness. The combination of the vertical vibrators 17 providing an active vibration source and the elastic pads 18 providing buffering and vibration isolation ensures both efficient compaction and the stability and durability of the equipment.

[0055] The following is a specific example: Four electromagnetic linear vibrators 17 can be fixedly connected around the perimeter of the vibrating plate 7, arranged at the four corners of the vibrating plate 7. These linear vibrators 17 are synchronously driven by a controller to ensure that the overall vibration frequency and amplitude of the vibrating plate 7 are consistent. Simultaneously, two highly elastic rubber pads can be fixedly connected between the vibrating plate 7 and the lifting platform 14. These rubber pads can be rectangular or circular and are evenly distributed in the area below the vibrating plate 7 that contacts the lifting platform 14 to provide stable support and effective cushioning. When the linear vibrators 17 are working, the vibrating plate 7 generates high-frequency vibration, and the rubber pads absorb most of the impact energy, transmitting the attenuated vibration to the lifting platform 14, thereby achieving efficient compaction and protecting the equipment.

[0056] The bottom of the movable frame 1 is slidably connected to a first slide rail 19. The rear end of the movable frame 1 is fixedly connected to a column 20, which is hinged to the adjusting frame 2. The front end of the movable frame 1 is hinged to a first telescopic rod 21, which is hinged to the adjusting frame 2.

[0057] By sliding the bottom of the movable frame 1 to the first slide rail 19, the entire vibratory table can move linearly along a preset path, thereby achieving precise position adjustment of the vibratory table. Simultaneously, the column 20 fixedly connected to the rear end of the movable frame 1 is hinged to the adjusting frame 2, providing a stable rear support point for the adjusting frame 2. The first telescopic rod 21, hinged to the front end of the movable frame 1, is hinged to the front end of the adjusting frame 2, forming a variable-length support structure. When the first telescopic rod 21 extends or retracts, its length change drives the adjusting frame 2 to pivot around the hinge point on the column 20. This linkage mechanism allows the adjusting frame 2 to change its tilt angle in a stable and controllable manner, thereby adjusting the tilt state of the support platform 3 and the vibratory plate 7. By achieving overall positioning through the first slide rail 19 and achieving precise adjustment of the angle of the vibratory plate 7 through the synergistic action of the column 20 and the first telescopic rod 21, this solution effectively solves the need for flexibility and stability in position and angle adjustment of the vibratory table under different working conditions, ensuring the vibration quality and efficiency during the coated sand molding process.

[0058] The following is a specific example. As a concrete implementation, the first slide rail 19 can be a heavy-duty linear guide rail. Its body is fixed to the workshop floor with anchor bolts. The bottom of the movable frame 1 is bolted with a slider that mates with the guide rail body, allowing the movable frame 1 to move smoothly along the guide rail. The column 20 can be composed of two high-strength rectangular steel pipes, vertically welded to the rear end of the movable frame 1. Its top is equipped with a bearing seat with a self-lubricating bearing for connection to the pin at the rear of the adjusting frame 2. The first telescopic rod 21 can be an electric push rod, one end of which is connected to the fixed bracket at the front end of the movable frame 1 via a pin, and the other end is connected to the ear plate at the front end of the adjusting frame 2 via a pin. The extension and retraction stroke of the electric push rod is precisely controlled by an independent controller. The operator can input the target angle through the control panel, and the controller will drive the electric push rod to extend or retract to the corresponding position, thereby achieving automated adjustment of the tilt angle of the adjusting frame 2.

[0059] The bottom of the limiting frame 9 is slidably connected to a second slide rail 22, which is fixedly connected to the adjusting frame 2. Both the first slide rail 19 and the second slide rail 22 are electromagnetic tracks. By setting both the first slide rail 19 slidably connected to the bottom of the moving frame 1 and the second slide rail 22 slidably connected to the bottom of the limiting frame 9 as electromagnetic tracks, precise and efficient control of the moving frame 1 and the lateral limiting mechanism of the vibrating plate 7 of the entire vibration table is achieved. Specifically, the moving frame 1 slides on the external support structure via the first slide rail 19 at its bottom, while the limiting frame 9 slides on the adjusting frame 2 via the second slide rail 22 at its bottom. When both the first slide rail 19 and the second slide rail 22 are electromagnetic tracks, frictionless or low-friction movement of the moving frame 1 and the limiting frame 9 can be achieved by precisely controlling the current and magnetic field of the electromagnetic tracks. The electromagnetic tracks can provide a strong driving force, enabling the moving frame 1 to move quickly and smoothly to the preset position. At the same time, the sliding of the limiting frame 9 on the adjusting frame 2 also becomes more precise and responsive. This non-contact or low-contact motion method greatly reduces mechanical wear, lowers operating noise, and improves positioning repeatability. In the coated sand molding line, the precise movement of the compaction table and the stable limiting of the vibrating plate 7 are crucial to ensuring the quality of the sand mold. The use of electromagnetic tracks allows the moving frame 1 to accurately position the compaction table at different workstations, while the limiting frame 9 can stably limit the lateral displacement of the vibrating plate 7 during vibration, thereby ensuring the stability of the compaction process and the accuracy of sand molding.

[0060] As a specific implementation, the first slide rail 19 and the second slide rail 22 can employ a linear synchronous motor track system. In this system, the track itself can serve as the stator of the linear motor, with electromagnetic coils evenly arranged along its length inside. The bottoms of the moving frame 1 and the limiting frame 9 are respectively equipped with permanent magnet arrays that act as the movers of the linear motor. When the controller supplies three-phase alternating current to the coils within the track, a traveling wave magnetic field moving along the track direction is generated. This traveling wave magnetic field interacts with the permanent magnets on the mover, generating electromagnetic thrust, thereby driving the moving frame 1 or the limiting frame 9 to move precisely along the track direction. By adjusting the frequency, phase, and amplitude of the current, the movement speed, acceleration, and final stopping position of the moving frame 1 and the limiting frame 9 can be precisely controlled. For example, when the moving frame 1 needs to move quickly from one workstation to another, the controller can output a high-frequency current to achieve high-speed movement; when precise positioning is required, it can switch to a low-speed or micro-stepping mode, utilizing the precise control capability of electromagnetic force to position the moving frame 1 or the limiting frame 9 to sub-millimeter accuracy. In addition, to further improve the reliability of the system, position sensors, such as optical or magnetic rulers, can be integrated into the electromagnetic track to provide real-time feedback on the current positions of the moving frame 1 and the limiting frame 9, and the electromagnetic drive can be precisely adjusted through a closed-loop control system.

[0061] A forward-protruding buffer plate 23 is fixedly connected to the front end of the limiting frame 9. The buffer plate 23 has ventilation holes 24. By providing the forward-protruding buffer plate 23 at the front end of the limiting frame 9, it serves as the foremost protective and contact component as the limiting frame 9 moves along the second slide rail 22 (electromagnetic track). When the limiting frame 9 moves forward, the buffer plate 23 first contacts any loose materials or air. The protruding design of the buffer plate 23 effectively absorbs or disperses impact forces, thus protecting the main structure of the limiting frame 9 from direct wear or damage. Simultaneously, the ventilation holes 24 on the buffer plate 23 release accumulated air pressure in front of it, preventing air resistance from affecting the smooth, high-speed movement of the limiting frame 9. Furthermore, the ventilation holes 24 allow fine sand or dust to pass through, preventing them from accumulating in front of the buffer plate 23, thus keeping the moving path of the limiting frame 9 clean and ensuring smooth and accurate sliding connection of the limiting frame 9 on the electromagnetic track. This structural combination effectively solves the problems of impact, material accumulation and air resistance that the limit frame 9 may encounter during movement, ensuring the stable and efficient operation of the entire vibration table.

[0062] The following is a specific example: the buffer plate 23 can be made of a 5 mm thick high-strength wear-resistant steel plate, and its front edge can be designed as an outward-sloping surface to better guide and disperse any coated sand particles it may encounter. To further enhance the buffering effect, the outer surface of the steel plate can be covered with a 2 mm thick polyurethane elastic layer. The buffer plate 23 is firmly fixed to the pre-reserved mounting holes at the front end of the limiting frame 9 by bolt connection. The vent holes 24 can be a series of evenly distributed circular holes with a diameter of 8 mm on the buffer plate 23, with a hole spacing of 20 mm, covering the entire surface of the buffer plate 23 to ensure sufficient air and fine particles can circulate.

[0063] The buffer assembly 12 includes a pressure block 1201. The clamping block 10 is provided with a sliding groove 1202 for the pressure block 1201 to slide. A guide rod 1203 is fixedly connected to the sliding groove 1202. A second spring 1204 is provided in the sliding groove 1202 on both the upper and lower sides of the pressure block 1201. The side of the pressure block 1201 protrudes out of the outer side of the pressure block.

[0064] The pressure block 1201 is the main load-bearing component in the buffer assembly 12. It is made of high-strength, wear-resistant engineering plastics, such as polyurethane, nylon, or polyoxymethylene, to provide good elasticity and impact resistance. The groove 1202 on the clamping block 10 provides a defined movement trajectory for the pressure block 1201, ensuring stable sliding during buffering and guiding effective displacement under load. The groove 1202 has a rectangular groove structure, and precision machining ensures smooth sliding of the pressure block 1201 within it, reducing frictional resistance. Alternatively, the inner wall of the groove 1202 can be coated with a low-friction coefficient material, such as polytetrafluoroethylene, or fitted with a wear-resistant bushing to further reduce sliding friction. The guide rod 1203 fixedly connected to the groove 1202 further restricts the movement direction of the pressure block 1201, preventing deflection or jamming within the groove 1202 and ensuring the stability and reliability of the buffering process. The guide rod 1203 is a cylindrical or square metal rod, securely fixed to the bottom or side wall of the slide groove 1202 by means of threading, welding, or pressing; alternatively, the guide rod 1203 can also be a pin structure that mates with the internal holes of the pressure block 1201, guiding the movement of the pressure block 1201 through the sliding of the pin. The second spring 1204, located in the slide grooves 1202 on both the upper and lower sides of the pressure block 1201, is the core elastic element of the buffer assembly 12. It absorbs and releases energy through compression and rebound, thereby buffering the impact force. Its placement on both the upper and lower sides provides bidirectional buffering capability, providing buffering when the pressure block 1201 is compressed and moves downwards, and also providing a certain degree of damping and positioning when the pressure is released and the block rebounds. The second spring 1204 can be a helical compression spring, and its stiffness coefficient can be selected according to the required buffering effect; the side of the pressure block 1201 protrudes from the outside of the pressure block, so that it can directly contact the outside of the mold box, thereby preventing the vibration of the mold box from being directly transmitted to the pressure block; the protruding part can be integrated into the overall structure of the pressure block 1201, or it can be achieved by additional wear-resistant pads, so as to facilitate replacement and maintenance.

[0065] By designing the buffer assembly 12 to include a pressure block 1201, a slide groove 1202, a guide rod 1203, and a second spring 1204, and making the side of the pressure block 1201 protrude outside the pressure block, effective buffering of the impact force between the vibrating plate 7 and the clamping block 10 is achieved. When the vibrating plate 7 drives the mold box to vibrate during vibration, the mold box transmits the vibration to the pressure block 1201. Under the action of the impact force, the pressure block 1201 slides along the slide groove 1202 inside the clamping block 10. Its movement direction is precisely guided by the guide rod 1203 fixedly connected in the slide groove 1202, ensuring the stability and linearity of the buffering process. During the sliding process of the pressure block 1201, the second springs 1204 on its upper and lower sides are compressed, thereby absorbing the impact energy transmitted from the vibrating plate 7. This two-way spring design not only provides cushioning when the pressure block 1201 is compressed and moves downwards, but also provides rebound force after the pressure is released, allowing the pressure block 1201 to return to its stable position. This reduces the impact of the mold box on the pressure block and prevents damage to the connecting parts of the pressure block due to vibration. The entire buffer assembly 12, as a whole, transforms the hard impact of the mold box on the pressure block into the elastic deformation of the spring through the synergistic effect of its components, thereby effectively reducing the impact intensity, mechanical wear, and noise.

[0066] In one specific implementation, the pressure-bearing block 1201 in the buffer assembly 12 can be a rectangular block made of highly elastic polyurethane material. The groove 1202 on the clamping block 10 can be a U-shaped groove milled inside the clamping block 10, with its inner wall finely polished. The guide rod 1203 fixedly connected to the groove 1202 can be a stainless steel round rod with a diameter of 10mm, threadedly fixed to the bottom center of the groove 1202. The second springs 1204 provided in the grooves 1202 on both the upper and lower sides of the pressure-bearing block 1201 can be two compression coil springs, placed above and below the pressure-bearing block 1201 respectively, and in contact with the inner wall of the groove 1202 and the upper and lower surfaces of the pressure-bearing block 1201. The side of the pressure block 1201 protrudes outside the pressure block. Specifically, the width of the pressure block 1201 is slightly larger than the inner width of the clamping block 10, so that its two side edges can extend outside the clamping block 10 and directly contact the side of the mold box.

[0067] Both sets of clamping blocks 10 are L-shaped structures. Guide sleeves 25 for sliding of the clamping blocks 10 are fixedly connected to the adjusting frame 2. First connecting rods 26 are hinged to the inner sides of both sets of clamping blocks 10. The two sets of first connecting rods 26 are hinged together to a second telescopic rod 27, which is slidably connected to the adjusting frame 2. By introducing the L-shaped clamping blocks 10, guide sleeves 25, first connecting rods 26, and second telescopic rods 27, a precise linkage mechanism is constructed to achieve synchronous and stable movement of the clamping blocks 10 and the baffle 11. Specifically, the two sets of L-shaped clamping blocks 10 slide against the guide sleeves 25 fixedly connected to the adjusting frame 2, ensuring a linear movement trajectory of the clamping blocks 10 on the adjusting frame 2. This L-shaped structure not only provides a stable clamping surface but also reserves space for the internal linkage mechanism. The inner sides of the two sets of clamping blocks 10 are respectively hinged to first connecting rods 26, the other ends of which are hinged together to the second telescopic rod 27. The second telescopic rod 27 itself is slidably connected to the adjusting frame 2. When an external driving force (e.g., driving the baffle 11 via the second link 28, which may be mentioned in later embodiments) acts on the baffle 11, since the baffle 11 is hinged to the adjusting frame 2 and connected to the second telescopic rod 27 via the second link 28 (as described in later embodiments), the movement of the baffle 11 will cause the second telescopic rod 27 to slide on the adjusting frame 2. The sliding of the second telescopic rod 27 transmits the force to the two sets of clamping blocks 10 through the first link 26, so that the two sets of clamping blocks 10 move relative to each other at the same speed and direction under the guidance of the guide sleeve 25. This linkage mechanism ensures that the two clamping blocks 10 always remain synchronized, thereby accurately adjusting the clamping width and avoiding problems such as jamming and asynchrony that may occur in traditional independent drive or simple linkage mechanisms. At the same time, since the movement of the clamping block 10 and the movement of the baffle 11 are closely related through the linkage mechanism, the baffle 11 can also move synchronously when adjusting the clamping width, thereby providing stable support and positioning throughout the entire clamping range. This structural design makes the entire clamping adjustment process smoother and more reliable, improving the operating accuracy and efficiency of the vibratory compaction table.

[0068] In one specific implementation, the two sets of clamping blocks 10 can be made of high-strength alloy steel, and their L-shaped structure can withstand large clamping forces without deformation. The guide sleeve 25 fixedly connected to the adjusting frame 2 can be a combination of polytetrafluoroethylene (PTFE) bushing and steel guide rail to provide a low coefficient of friction and good wear resistance, ensuring smooth sliding of the clamping blocks 10. The first connecting rod 26 hinged to the inner side of the two sets of clamping blocks 10 can be connected to a bearing seat using a high-strength steel pin to reduce friction and wear during movement. The second telescopic rod 27 can be a precision-machined cylindrical or square steel rod, and its sliding connection with the adjusting frame 2 can be achieved through linear bearings or sliding bearings to ensure stable linear movement on the adjusting frame 2. For example, the second telescopic rod 27 can be installed between two linear bearings on the adjusting frame 2 to achieve low-friction sliding. When the clamping width needs to be adjusted, the baffle 11 is moved by driving the baffle 11. The baffle 11 drives the second telescopic rod 27 to move through the second connecting rod 28. The second telescopic rod 27 then drives the two sets of clamping blocks 10 to move inward or outward synchronously through the first connecting rod 26, thereby achieving precise clamping of sand boxes of different sizes.

[0069] The second telescopic rod 27 is hinged to a second connecting rod 28 at its end. The second connecting rod 28 is hinged to the baffle 11, which is a triangular prism structure.

[0070] The movement of the second telescopic rod 27 is transmitted to the baffle 11 via the second connecting rod 28, forming a more precise linkage mechanism. The second telescopic rod 27 is the inner rod of the telescopic rod. When the second telescopic rod 27 slides left and right, its displacement is further precisely transmitted to the baffle 11 via the second connecting rod 28 hinged at its end. Simultaneously, the second telescopic rod 27 drives two faster, synchronously moving relative to each other via the first connecting rod 26. This indirect and controlled connection method ensures that the movement of the baffle 11 no longer depends solely on a single hinge point on the adjusting frame 2, but is closely related to the synchronous movement of the second telescopic rod 27, thus achieving precise control over the position and attitude of the baffle 11. Furthermore, the baffle 11 adopts a triangular prism structure, significantly enhancing its structural rigidity and resistance to deformation. This high-rigidity baffle 11 maintains a stable shape and position when in contact with the sand box and subjected to impacts and pressures during compaction, effectively avoiding deformation or swaying that may occur with traditional flat baffles 11, ensuring stable support and precise positioning of the sand box. Therefore, this solution solves the problems of insufficient stability and inaccurate positioning that may occur in the movement and positioning of the baffle 11 by combining the precise transmission of the linkage mechanism and the enhanced rigidity of the triangular prism structure.

[0071] The following is a specific example: the end of the second telescopic rod 27 can be hinged to one end of the second connecting rod 28 via a pin with a self-lubricating bearing, ensuring smooth movement and low friction. The other end of the second connecting rod 28 is hinged to the center of the side of the baffle 11 via another pin to provide balanced force transmission. The second connecting rod 28 can be made of a solid steel rod with a rectangular cross-section to provide sufficient bending strength and torsional stiffness. The baffle 11 can be formed into a triangular prism structure with an equilateral triangular cross-section by precision bending of a 5mm thick Q235 steel plate. The edges that contact the sand box can be chamfered with an radius of 5 (R5) to avoid damage to the sand box and improve contact stability.

[0072] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibratory compaction table for a coated sand molding line, characterized in that: The system includes a movable frame (1), an adjustable frame (2) hinged to the movable frame (1), a support platform (3) fixedly connected to the adjustable frame (2), a guide groove (4) and an inner groove (5) on the support platform (3), a guide roller (6) rotatably connected in the guide groove (4), a vibrating plate (7) slidably connected in the inner groove (5), a through groove (8) for the guide roller (6) to pass through on the vibrating plate (7), a limiting frame (9) on the side of the vibrating plate (7), the limiting frame (9) slidably connected to the adjustable frame (2), two relatively movable clamping blocks (10) slidably connected on both sides of the adjustable frame (2), a synchronously moving baffle (11) provided in the middle of the two clamping blocks (10), a buffer assembly (12) that cooperates with the vibrating plate (7) slidably connected to the clamping blocks (10), and the baffle (11) hinged to the adjustable frame (2). An elastic pressure bar (13) is fixedly connected to the bottom of the vibrating plate (7). The elastic pressure bar (13) exerts a downward force on the vibrating plate (7). The top of the guide roller (6) is higher than the top surface of the vibrating plate (7). A lifting platform (14) is installed between the vibrating plate (7) and the adjusting frame (2). The buffer assembly (12) includes a pressure block (1201), and the clamping block (10) is provided with a sliding groove (1202) for the pressure block (1201) to slide. A guide rod (1203) is fixedly connected to the sliding groove (1202). A second spring (1204) is provided in the sliding groove (1202) on both the upper and lower sides of the pressure block (1201). The side of the pressure block (1201) protrudes out of the outer side of the pressure block. The adjusting frame (2) is fixedly connected to multiple sets of side support plates (15). The lifting platform (14) and the elastic pressure rod (13) are both located on the side support plate (15). The elastic pressure rod (13) includes a support rod (1301). The side support plate (15) is provided with a guide hole (16) for the support rod (1301) to slide. A limiting piece (1302) is fixedly connected below the support rod (1301). A first spring (1303) is sleeved on the support rod (1301) between the limiting piece (1302) and the side support plate. The front end of the limiting frame (9) is fixedly connected to a forward-protruding buffer plate (23), and the buffer plate (23) has a ventilation hole (24). Both sets of clamping blocks (10) are L-shaped structures. The adjusting frame (2) is fixedly connected with a guide sleeve (25) for the clamping blocks (10) to slide. Both sets of clamping blocks (10) are hinged to the inner side with a first connecting rod (26). Both sets of first connecting rods (26) are hinged to a second telescopic rod (27). The second telescopic rod (27) is slidably connected to the adjusting frame (2). The second telescopic rod (27) is hinged to a second connecting rod (28) at its end. The second connecting rod (28) is hinged to the baffle (11), which is a triangular prism structure.

2. The vibratory compaction table for a coated sand molding line according to claim 1, characterized in that: The vibrating plate (7) is fixedly connected to the four sides of the vibrating plate (7), and an elastic pad (18) is fixedly connected between the vibrating plate (7) and the lifting platform (14).

3. The vibratory compaction table for a coated sand molding line according to claim 1, characterized in that: The bottom of the mobile frame (1) is slidably connected to a first slide rail (19), and the rear end of the mobile frame (1) is fixedly connected to a column (20). The column (20) is hinged to the adjusting frame (2), and the front end of the mobile frame (1) is hinged to a first telescopic rod (21). The first telescopic rod (21) is hinged to the adjusting frame (2).

4. The vibratory compaction table for a coated sand molding line according to claim 3, characterized in that: The bottom of the limiting frame (9) is slidably connected to a second slide rail (22), which is fixedly connected to the adjusting frame (2). Both the first slide rail (19) and the second slide rail (22) are electromagnetic tracks.

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