Lost foam casting device

Abstract

The invention discloses an evanescent mode casting device, and relates to the technical field of evanescent mode casting, the evanescent mode casting device comprises a casting sand box, a movable support, a vibration seat and a model support, an extrusion plate is arranged in the casting sand box, the extrusion plate is pushed by a pushing hydraulic cylinder to move along a sliding rail, and a plurality of foam models can be synchronously clamped through the model support; the foam model can be kept in a vertical state when being placed in the casting sand box, the model cannot be inclined when the casting sand is filled, compared with the mode that the model is independently placed manually, the operation efficiency is higher, meanwhile, the situation that the flowing path of molten metal deviates during casting is reduced, the yield is increased, the casting sand is subjected to vibration compaction through the vibration base, and the production efficiency is improved. The extrusion plate extrudes the molding sand, gaps between the molding sand are further reduced, the filling compactness is improved, deformation or displacement of the model with uneven supporting force in the pouring process is avoided, through holes for the molding sand to pass through are formed in the vibration base, and the purpose of rapidly discharging the molding sand can be achieved through vibration.

Description

Technical Field

[0001] The invention relates to the technical field of lost foam casting, in particular to a lost foam casting device. Background Art

[0002] Lost foam casting (LFC) is a high-precision casting method widely used in the production of castings requiring complex shapes and high precision, particularly in the aerospace, automotive, and machinery sectors. Its core concept is to use a foam model instead of a traditional metal or sand mold. The foam model is then completely lost at high temperatures during metal pouring, resulting in the desired casting. LFC can produce complex shapes and details that are impossible with traditional casting methods. The resulting castings are smooth and dimensionalally precise, reducing subsequent processing.

[0003] Lost foam casting requires placing a foam model in a sand box and filling it with molding sand. It is necessary to first fill the sand box with a portion of molding sand, then place the foam model on the molding sand and fill it with molding sand again. Because the surface of the molding sand is not flat enough, the foam model will tilt, and filling it with molding sand again will aggravate this phenomenon, causing the flow path of the molten metal to deviate, destroying the filling stability, and the compaction of the molding sand in different areas of the gap will be different only by vibration. At present, the means of discharging the molding sand from the sand box is mostly to flip the sand box so that the molding sand is automatically unloaded from the box mouth. The sand box is heavy and not easy to flip, and the molding sand in the sand box is still in a vibrated state at this time, and the molding sand is not easy to unload. Therefore, a lost foam casting device is proposed to solve the above problems. Summary of the Invention

[0004] In order to solve the above technical problems, a lost foam casting device is provided. This technical solution solves the problem that the foam model becomes tilted, causing the metal liquid flow path to deviate, destroying the filling stability, and the compactness of different areas will be different only through vibration.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is: A lost foam casting device comprises: a casting sand box, a movable bracket, a vibration base, and a model bracket, wherein the casting sand box is arranged above the movable bracket, and rollers are rotatably connected to both ends of the movable bracket. The movable bracket is used to drive the casting sand box to move, and the vibration base is arranged below the casting sand box. The vibration base is used to drive the casting sand box to vibrate. The model bracket is suspended inside the casting sand box and is used to clamp and fix the foam model. The casting sand box includes a side plate and an extrusion plate, the inner wall of the side plate is fixedly connected to a plurality of sliding rails, and both ends of the extrusion plate are slidably connected to the sliding rails and the inner wall of the side plate; The vibration seat includes a first support plate, a vibration damping assembly, a second support plate, a lifting hydraulic cylinder and a third support plate, the upper end of the first support plate is fixedly connected to a plurality of support blocks, the lower end of the first support plate is fixedly connected to four mounting brackets, the four mounting brackets are symmetrically arranged, and a vibration motor is installed on one side of the mounting bracket, the vibration motor is used to drive the first support plate to vibrate, the second support plate is arranged at the lower end of the first support plate, and a plurality of vibration damping assemblies are installed between the first support plate and the second support plate, the vibration damping assemblies are used to absorb the vibration generated by the first support plate, and a plurality of lifting hydraulic cylinders are installed on the upper end of the third support plate, and the output end of the lifting hydraulic cylinder is connected to the second support plate through a vibration damping pad.

[0006] Preferably, the casting sand box also includes a bottom plate, the upper end of the bottom plate is fixedly connected to the steel mesh plate, the top of the steel mesh plate is slidably connected to the bottom of the extrusion plate, a sealing gasket is installed at the connection between the extrusion plate, the side plate and the steel mesh plate, the outer side of the extrusion plate is fixedly connected to a connecting plate, a connecting frame is provided on one side of the connecting plate, a plurality of damping springs are installed between the connecting plate and the connecting frame, a fixing frame is provided on the side of the connecting frame away from the extrusion plate, the ends of the fixing frame are respectively fixedly connected to the side plates and the bottom plate, a pushing hydraulic cylinder is installed in the middle of the fixing frame, the output end of the pushing hydraulic cylinder passes through the fixing frame and is fixedly connected to the connecting frame through a connecting seat.

[0007] Preferably, the side panels away from each other are fixedly connected with a plurality of connecting bosses, the bottom plate and the middle part of the steel mesh plate are provided with through holes, the lower end of the bottom plate is fixedly connected with a sand discharge port at the through hole, a sealing plate is inserted into the inside of the sand discharge port, a pushing cylinder is provided on one side of the sealing plate, the pushing cylinder is installed on the bottom of the bottom plate, the output end of the pushing cylinder is fixedly connected to the sealing plate through a connecting seat, a negative pressure connecting pipe is provided on one side of the sand discharge port, and the negative pressure connecting pipe is communicated with the interior of the casting sand box.

[0008] Preferably, both ends of the third support plate are fixedly connected with a plurality of fixing blocks, the fixing blocks are arranged corresponding to the connecting bosses, a spring damping assembly is installed on the upper end of the fixing block, and fixing brackets are provided on both sides of the spring damping assembly, the lower end of the fixing bracket is fixedly connected to the fixing block, the upper end of the spring damping assembly is slidably connected with a connecting rod, the top of the connecting rod is rotatably connected to the locking block by a fixing pin, the middle part of the locking block is rotatably connected to the fixing brackets on both sides of the locking block by a fixing pin, the locking block is located above the connecting boss and an anti-slip pad is installed at its lower end.

[0009] Preferably, the middle parts of the first support plate, the second support plate and the third support plate are each provided with a through hole for the molding sand to pass through.

[0010] Preferably, the model bracket includes a fixed frame, a slide rail and a fixed hook. The fixed frame is arranged in a rectangular frame. The upper ends of the two sides of the fixed frame are installed with slide rails, and one end of the other two sides of the fixed frame is installed with multiple fixing hooks. The upper ends of the fixing hooks are fixed to the fixed frame by clamping with the top of the side panel.

[0011] Preferably, a plurality of movable rods are provided above the slide rail, and the lower ends of both sides of the plurality of movable rods are fixedly connected with sliding blocks, the inner walls of the sliding blocks are slidably connected to the slide rail, one end of the sliding block on one side is fixedly connected with a connecting block, the middle part of the connecting block is threadedly connected to a bidirectional screw rod, one end of the bidirectional screw rod is rotatably connected to a fixed frame, and the other end of the bidirectional screw rod is rotatably connected to a mounting block installed in the middle of the fixed frame.

[0012] Preferably, a driving assembly is provided in the middle of the bidirectional screw rod, and the driving assembly is installed on one side of the fixed frame. The surface of the moving rod is clamped with a plurality of clamping blocks, and the clamping blocks arranged on adjacent moving rods are arranged correspondingly. One side of the clamping block is fixedly connected with a clamping block, and the inner side of the clamping block is arranged in an arc shape and is connected with a rubber pad. The other side of the clamping block is threadedly connected with a plurality of quick-release bolts, and one end of the quick-release bolt extends to the inside of the clamping block and abuts against the clamping groove opened on the surface of the moving rod.

[0013] Preferably, the driving assembly includes a gear box, a rotating rod, a rotating handle, a first bevel gear and a second bevel gear. One side of the gear box is fixedly connected to the fixed frame, the top of the gear box is rotatably connected to the rotating rod, the upper end of the rotating rod is rotatably connected to the rotating handle, the lower end of the rotating rod is equipped with a first bevel gear, one side of the first bevel gear is meshed with a second bevel gear, and the second bevel gear is fixedly installed on the surface of the bidirectional screw rod.

[0014] Preferably, a slide groove is provided on the top of the gear box, and a locking slider is slidably connected to the inside of the slide groove. A wedge block is fixedly connected to the lower end of the locking slider. An elastic ratchet is provided on one side of the wedge block. One end of the elastic ratchet is fixedly connected to the inner wall of the gear box. The locking slider moves to squeeze the elastic ratchet and bend downward to lock the second bevel gear. An unlocking button for locking it is provided on one side of the locking slider, and a corresponding card block is provided on one side of the locking slider and the lower end of the unlocking button.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with an extrusion plate, which can move along a sliding track. The extrusion plate is pushed and moved by pushing a hydraulic cylinder. When the molding sand in the casting sand box is vibrated and compacted, the hydraulic cylinder is pushed to extend to push the extrusion plate to move to squeeze the molding sand in the casting sand box, which can further reduce the gap between the molding sand, improve the filling compactness, and avoid the gap between the molding sand and the model surface, which causes uneven support force of the molding sand on the foam model, resulting in deformation or displacement of the model during the pouring process, and casting defects.

[0016] 2. The present invention is provided with a vibration seat, and a through hole for the molding sand to pass through is opened inside the vibration seat. When discharging sand, the sand discharge port is opened by pushing the cylinder, and the two extrusion plates are driven away by the contraction of the hydraulic cylinder at the same time. The vibration motor is started to drive the casting sand box to vibrate, which can disperse the agglomerated molding sand in the casting sand box and make the molding sand quickly discharged through the sand discharge port. The sand can be quickly discharged without turning the casting sand box over, and the sand discharge process is convenient and fast.

[0017] 3. The present invention is provided with a model bracket, which can synchronously clamp multiple foam models, so that the foam model can be kept in a vertical state when placed in the casting sand box, and the model will not be tilted when filling the molding sand. Compared with manually placing the model separately, the operation efficiency is higher, and it also reduces the deviation of the metal liquid flow path during casting, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the casting sand box in the present invention; Figure 3 Schematic diagram of the bottom structure of the casting sand box in the present invention; Figure 4 It is a structural schematic diagram of the vibration seat in the present invention; Figure 5 Schematic diagram of the side structure of the vibration seat in the present invention; Figure 6 Schematic diagram of the structure of the model support in the present invention; Figure 7 for Figure 6 A partial enlarged schematic diagram of point A in the middle; Figure 8 Schematic diagram of the structure of the drive assembly in the present invention; Figure 9 Schematic diagram of the side structure of the drive assembly in the present invention; Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure at AA in the middle.

[0019] The numbers in the figure are: 1. Casting sand box; 11. Side panels; 111. Sliding rails; 112. Connecting bosses; 12. Extrusion plate; 121. Connecting plate; 122. Damping spring; 123. Connecting frame; 124. Fixed frame; 125. Pushing hydraulic cylinder; 126. Sealing gasket; 13. Bottom plate; 131. Steel mesh plate; 14. Sand discharge port; 141. Sealing plate; 15. Pushing cylinder; 16. Negative pressure connecting pipe; 2. Mobile bracket; 21. Roller; 3. Vibration seat; 31. First support plate; 311. Support block; 312. Mounting bracket; 313. Vibration motor; 32. Vibration damping assembly; 33. Second support plate; 331. Vibration damping pad; 34. Lifting hydraulic cylinder; 35. Third support plate; 36. Fixing block; 361. Fixing bracket; 37. Spring damping assembly; 38. Connecting rod; 39. Locking block; 391. Anti-slip pad; 4. Model bracket; 41. Fixed frame; 42. Slide rail; 421. Sliding block; 422. Moving rod; 4221. Card slot; 423. Connecting block; 424. Bidirectional screw; 43. Card block; 431. Clamping block; 432. Rubber pad; 433. Quick-release bolt; 44. Drive assembly; 441. Gear box; 442. Rotating rod; 443. Rotating handle; 444. First bevel gear; 445. Second bevel gear; 446. Slide slot; 447. Locking slider; 4471. Wedge block; 448. Elastic ratchet; 449. Unlock button; 45. Mounting block; 46. Fixing hook. DETAILED DESCRIPTION

[0020] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of implementing the present application, but the description is for the purpose of illustrating the general principles of the present application and is not used to limit the scope of the present application.

[0021] like Figure 1-Figure 5As shown, a lost foam casting device includes: a casting sand box 1, a movable bracket 2, a vibration base 3 and a model bracket 4. The casting sand box 1 is arranged above the movable bracket 2, and the two ends of the movable bracket 2 are rotatably connected to rollers 21. The movable bracket 2 is used to drive the casting sand box 1 to move along the track, so as to facilitate filling the casting sand box 1 with molding sand and placing the foam model. The vibration base 3 is arranged below the casting sand box 1. The vibration base 3 is used to drive the casting sand box 1 to vibrate. The model bracket 4 is suspended inside the casting sand box 1. The model bracket 4 is used to clamp and fix the foam model so that the foam model is evenly arranged and the model can remain in the same position when filling the molding sand.

[0022] Among them, the casting sand box 1 includes a side panel 11, an extrusion panel 12 and a bottom panel 13. The inner wall of the side panel 11 is fixedly connected with a plurality of sliding rails 111. Both ends of the extrusion panel 12 are slidably connected with the sliding rails 111 and the inner wall of the side panel 11. The upper end of the bottom panel 13 is fixedly connected with the steel mesh panel 131. The middle part of the steel mesh panel 131 is provided with a plurality of small through holes. The diameter of the through holes is smaller than the particle size of the molding sand. The top of the steel mesh panel 131 is slidably connected with the bottom of the extrusion panel 12. The connection between the extrusion panel 12 and the side panel 11 and the steel mesh panel 131 is installed with a sealing gasket 126. The sealing gasket 126 can seal the sliding connection when negative pressure suction is performed. The outer side of the extrusion panel 12 is fixedly connected with a connecting plate 121. A connecting frame 123 is provided on one side of the connecting plate 12. 1 and a connecting frame 123 are provided with a plurality of damping springs 122. A fixing frame 124 is provided on the side of the connecting frame 123 away from the extrusion plate 12. The ends of the fixing frame 124 are fixedly connected to the side plate 11 and the bottom plate 13 respectively. A pushing hydraulic cylinder 125 is installed in the middle of the fixing frame 124. The output end of the pushing hydraulic cylinder 125 passes through the fixing frame 124 and is fixedly connected to the connecting frame 123 through the connecting seat. The two pushing hydraulic cylinders 125 are extended at the same time to push the connecting frame 123 and the extrusion plate 12 to move. When the vibrating seat 3 drives the casting sand box 1 to vibrate, the two extrusion plates 12 squeeze each other to form dynamic extrusion of the molding sand, reduce the gap between the molding sand, improve the filling compactness, and avoid the gap between the molding sand and the model, which leads to defects such as burrs after casting.

[0023] like Figure 2 and Figure 3As shown, the side panels 11 away from each other are fixedly connected with a plurality of connecting bosses 112, and the middle parts of the bottom plate 13 and the steel mesh plate 131 are provided with through holes. The lower end of the bottom plate 13 is fixedly connected with a sand discharge port 14 at the through hole, and a sealing plate 141 is inserted into the inside of the sand discharge port 14. A pushing cylinder 15 is provided on one side of the sealing plate 141, and the pushing cylinder 15 is installed at the bottom of the bottom plate 13. The output end of the pushing cylinder 15 is fixedly connected to the sealing plate 141 through the connecting seat. The sealing plate 141 can be pulled by pushing the cylinder 15 to control the opening or closing of the sand discharge port 14. A negative pressure connecting pipe 16 is provided on one side of the sand discharge port 14. The negative pressure connecting pipe 16 is communicated with the interior of the casting sand box 1, and the negative pressure connecting pipe 16 is connected to the external negative pressure pipeline. After the molding sand is coated, the interior of the casting sand box 1 is sucked under negative pressure through the negative pressure connecting pipe 16 to make the interior of the molding sand tighter.

[0024] like Figure 4As shown, the vibration seat 3 includes a first support plate 31, a vibration reduction assembly 32, a second support plate 33, a lifting hydraulic cylinder 34 and a third support plate 35. The upper end of the first support plate 31 is fixedly connected to a plurality of support blocks 311, and the lower end of the first support plate 31 is fixedly connected to four mounting frames 312. The four mounting frames 312 are symmetrically arranged. A vibration motor 313 is installed on one side of the mounting frame 312. The vibration motor 313 is used to drive the first support plate 31 to vibrate, two of which are installed horizontally and the other two are installed vertically. The casting sand box 1 is driven to vibrate through horizontal and vertical vibrations. The vibration of the sand box 1 causes the sand grains to rearrange and fill the gaps between the sand grains and between the sand grains and the model, thereby generating vibration enhancement in multiple directions. The multi-dimensional vibration effect improves the compactness of the molding sand. The second support plate 33 is arranged at the lower end of the first support plate 31. Several vibration damping components 32 are installed between the first support plate 31 and the second support plate 33. The vibration damping component 32 is used to absorb the vibration generated by the first support plate 31 to prevent the vibration from being transmitted downward. A plurality of lifting hydraulic cylinders 34 are installed on the upper end of the third support plate 35. The output end of the lifting hydraulic cylinder 34 is connected to the second support plate 33 through a vibration damping pad 331. Both ends of the third support plate 35 are fixedly connected with a plurality of fixing blocks 36. The fixing blocks 36 are correspondingly arranged to the connecting bosses 112. The upper end of the fixing block 36 is installed with a spring damping component 37. Fixed brackets 361 are provided on both sides of the spring damping component 37. The lower end of the fixed bracket 361 is connected to the The fixing block 36 is fixedly connected, and the upper end of the spring damping assembly 37 is slidably connected to the connecting rod 38. The top of the connecting rod 38 is rotatably connected to the locking block 39 by a fixing pin. The middle of the locking block 39 is rotatably connected to the fixing brackets 361 on both sides of the locking block 39 through a fixing pin. The locking block 39 is located above the connecting boss 112 and an anti-slip pad 391 is installed at its lower end. When the molding sand in the casting sand box 1 needs to be vibrated and compacted, multiple lifting hydraulic cylinders 34 extend to push the second support plate 33 and the first support plate 31 to rise. The support block 311 abuts against the bottom of the casting sand box 1 and drives the casting sand box 1 to lift. After the casting sand box 1 continues to rise, the lower end of the anti-slip pad 391 will abut against the connecting boss 112, and the damping spring 122 pushes one end of the locking block 39 The first support plate 31 and the second support plate 33 are connected to each other by the spring and the spring damping assembly 37. The spring is arranged inside the spring damping assembly 37 to provide support for the connecting rod 38. When the locking block 39 presses the connecting boss 112, the hydraulic cylinder 34 is lifted to stop extending. The vibration motor 313 starts to drive the first support plate 31 and the casting sand box 1 to vibrate. The energy generated by the external force is consumed by the liquid flow and pressure change inside the spring damping assembly 37, thereby absorbing the vibration and preventing the vibration from being transmitted downward. The middle parts of the first support plate 31, the second support plate 33 and the third support plate 35 are all provided with through holes for the passage of molding sand. When discharging sand, the sand discharge port 14 is opened by pushing the cylinder 15, and the hydraulic cylinder 125 is pushed to contract to drive the two extrusion plates 12 away.Restarting the vibration motor 313 to drive the casting sand box 1 to vibrate can disperse the agglomerated molding sand in the casting sand box 1, making it easier for the molding sand to be quickly discharged through the sand discharge port 14. The casting sand box 1 can be quickly discharged without turning it over.

[0025] Please refer to Figure 6 and 7 The model bracket 4 includes a fixed frame 41, a slide rail 42 and a fixed hook 46. The fixed frame 41 is arranged in a rectangular frame, and the upper ends of both sides of the fixed frame 41 are equipped with slide rails 42, and one end of the other two sides of the fixed frame 41 is equipped with multiple fixing hooks 46. The upper ends of the fixing hooks 46 are fixed to the fixed frame 41 by being engaged with the top of the side plate 11. The model bracket 4 is placed inside the casting sand box 1 through the fixing hooks 46. A plurality of moving rods 422 are provided above the slide rail 42, and the lower ends of both sides of the multiple moving rods 422 are fixedly connected to sliding blocks 421. The inner walls of the sliding blocks 421 are slidably connected to the slide rail 42. One end of the sliding block 421 on one side is fixedly connected to a connecting block 423. The middle part of the connecting block 423 is threadedly connected to a bidirectional screw rod 424. One end of the bidirectional screw rod 424 is rotatably connected to the fixed frame 41, and the other end of the bidirectional screw rod 424 is rotatably connected to the mounting block 45 installed in the middle of the fixed frame 41.

[0026] Among them, a driving assembly 44 is provided in the middle of the bidirectional screw rod 424, and the driving assembly 44 is installed on one side of the fixed frame 41. The surface of the moving rod 422 is clamped with a plurality of clamping blocks 43, and the clamping blocks 43 provided on adjacent moving rods 422 are correspondingly provided. One side of the clamping block 43 is fixedly connected with a clamping block 431, and the inner side of the clamping block 431 is arranged in an arc shape and is connected with a rubber pad 432. The other side of the clamping block 43 is threadedly connected with a plurality of quick-release bolts 433. The quick-release bolts 433 extend to one end of the inside of the clamping block 43 and abut against the clamping groove 4221 provided on the surface of the moving rod 422. The overdrive assembly 44 drives the bidirectional screw rod 424 to rotate, so that the moving rods 422 on both sides move toward each other and approach each other, and the moving rods 422 drive the clamping blocks 431 to approach each other, and the rubber pads 432 on the clamping blocks 431 contact the foam model to avoid damage to the model. The two clamping blocks 431 clamp the foam model to clamp and fix it. The clamping blocks 43 can be disassembled and replaced by quick-release bolts 433. The matching clamping blocks 431 can be replaced according to the size of the model. It is also convenient to adjust the position of the clamping blocks 431. If the foam model is small, the number of clamping blocks 431 can be increased.

[0027] The driving assembly 44 includes a gear box 441, a rotating rod 442, a rotating handle 443, a first bevel gear 444 and a second bevel gear 445. One side of the gear box 441 is fixedly connected to the fixed frame 41, the top of the gear box 441 is rotatably connected to the rotating rod 442, the upper end of the rotating rod 442 is rotatably connected to the rotating handle 443, the lower end of the rotating rod 442 is installed with the first bevel gear 444, one side of the first bevel gear 444 is meshed with the second bevel gear 445, and the second bevel gear 445 is engaged with the first bevel gear 444. 45 is fixedly installed on the surface of the bidirectional screw rod 424. Rotating the rotating rod 442 can drive the second bevel gear 445 to rotate through the first bevel gear 444, thereby driving the bidirectional screw rod 424 to rotate. A slide groove 446 is provided on the top of the gear box 441. A locking slider 447 is slidably connected to the inside of the slide groove 446. The lower end of the locking slider 447 is fixedly connected to a wedge block 4471. An elastic ratchet 448 is provided on one side of the wedge block 4471. One end of the elastic ratchet 448 is fixedly connected to the gear When the locking slider 447 is close to the unlocking button 449, the block on one side of the locking slider 447 will engage with the block at the lower end of the unlocking button 449. At the same time, the unlocking button 449 will push the unlocking button 449 under the elastic force of the bottom spring. Pressing the unlocking button 449 will cause the block at the lower end of the unlocking button 449 to disengage from the block on one side of the locking slider 447, releasing the locking slider 447 and moving the elastic ratchet 448 away from the second bevel gear 445. The second bevel gear 445 can rotate at this time, thereby driving the two moving rods 422 away to release the foam model.

[0028] The principle of the present invention is as follows: the foam model after the coating is solidified is placed between the two clamping blocks 431, and the rotating rod 442 is rotated to make the moving rods 422 on both sides move toward each other and approach each other, and the foam model is clamped and fixed by the clamping block 431, so that multiple foam models can be clamped at a time, and after clamping, the locking slider 447 is pushed to lock the second bevel gear 445 to prevent the sliding block 421 from moving and causing loosening, and the model bracket 4 holding the model is placed inside the casting sand box 1, and the casting sand box 1 is driven by the moving bracket 2 to move to the top of the vibration seat 3 for filling with molding sand, and the filling stops after the filling amount reaches the standard, and then the unlocking button 449 is pressed to release the foam model, and the model bracket 4 is removed, and multiple lifting hydraulic cylinders 34 extend to push the second support plate 33 and the first support plate 31 to rise, and the support block 311 abuts against the bottom of the casting sand box 1 and drives the casting sand box 1 to rise, and the casting sand box 1 continues to rise and prevents slipping The lower end of the pad 391 will abut against the connecting boss 112, and the vibration motor 313 is started to drive the first support plate 31 and the casting sand box 1 to vibrate. At the same time, the two pushing hydraulic cylinders 125 extend at the same time to push the connecting frame 123 and the squeezing plate 12 to move. When the casting sand box 1 vibrates, the two squeezing plates 12 squeeze each other to form a dynamic squeezing of the molding sand, thereby reducing the gap between the molding sand and improving the filling compaction. After that, the film is coated and the negative pressure connecting pipe 16 is used to suck the negative pressure inside the casting sand box 1 to further improve the compactness of the molding sand. After casting is completed and cooled, the sand discharge port 14 is opened by pushing the cylinder 15, and the hydraulic cylinder 125 is pushed to contract to drive the two squeezing plates 12 away. The vibration motor 313 is started again to drive the casting sand box 1 to vibrate, which can disperse the agglomerated molding sand in the casting sand box 1 and make the molding sand quickly discharged through the sand discharge port 14. There is no need to flip the casting sand box 1 to quickly discharge the sand, which is more convenient.

[0029] Finally, it should be noted that when describing the positions of various components and the matching relationships between them, the present invention usually takes one / a pair of components as an example. However, those skilled in the art should understand that such positions, matching relationships, etc. are also applicable to other components / other pairs of components.

[0030] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A lost foam casting device, characterized in that: include: A casting sand box (1), a movable bracket (2), a vibration seat (3) and a model bracket (4), wherein the casting sand box (1) is arranged above the movable bracket (2), and rollers (21) are rotatably connected to both ends of the movable bracket (2), and the movable bracket (2) is used to drive the casting sand box (1) to move, and the vibration seat (3) is arranged below the casting sand box (1), and the vibration seat (3) is used to drive the casting sand box (1) to vibrate, and the model bracket (4) is suspended inside the casting sand box (1), and the model bracket (4) is used to clamp and fix the foam model; The casting sand box (1) comprises a side plate (11) and an extrusion plate (12), wherein the inner wall of the side plate (11) is fixedly connected to a plurality of sliding rails (111), and both ends of the extrusion plate (12) are slidably connected to the sliding rails (111) and the inner wall of the side plate (11); The vibration seat (3) comprises a first support plate (31), a vibration reduction assembly (32), a second support plate (33), a lifting hydraulic cylinder (34) and a third support plate (35), wherein the upper end of the first support plate (31) is fixedly connected to a plurality of support blocks (311), and the lower end of the first support plate (31) is fixedly connected to four mounting frames (312), the four mounting frames (312) are symmetrically arranged, and a vibration motor (313) is installed on one side of each mounting frame (312), and the vibration motor (313) It is used to drive the first support plate (31) to vibrate, the second support plate (33) is arranged at the lower end of the first support plate (31), and a plurality of vibration-damping components (32) are installed between the first support plate (31) and the second support plate (33), and the vibration-damping components (32) are used to absorb the vibration generated by the first support plate (31). A plurality of lifting hydraulic cylinders (34) are installed at the upper end of the third support plate (35), and the output end of the lifting hydraulic cylinder (34) is connected to the second support plate (33) through a vibration-damping pad (331).

2. The lost foam casting device according to claim 1, characterized in that: The casting sand box (1) further comprises a bottom plate (13), the upper end of the bottom plate (13) being fixedly connected to the steel mesh plate (131), the top of the steel mesh plate (131) being slidably connected to the bottom of the extrusion plate (12), a sealing gasket (126) being installed at the connection between the extrusion plate (12), the side plate (11) and the steel mesh plate (131), the outer side of the extrusion plate (12) being fixedly connected to a connecting plate (121), a connecting frame (123) being provided on one side of the connecting plate (121), and the connecting plate ( A plurality of damping springs (122) are installed between the fixing frame (121) and the connecting frame (123), a fixing frame (124) is provided on a side of the connecting frame (123) away from the extrusion plate (12), the ends of the fixing frame (124) are fixedly connected to the side plate (11) and the bottom plate (13), respectively, a pushing hydraulic cylinder (125) is installed in the middle of the fixing frame (124), the output end of the pushing hydraulic cylinder (125) passes through the fixing frame (124) and is fixedly connected to the connecting frame (123) through a connecting seat.

3. The lost foam casting device according to claim 2, characterized in that: The sides of the side plates (11) that are away from each other are fixedly connected with a plurality of connecting bosses (112), the bottom plate (13) and the steel mesh plate (131) are provided with through holes in the middle, the lower end of the bottom plate (13) is fixedly connected with a sand discharge port (14) at the through hole, the interior of the sand discharge port (14) is plugged with a sealing plate (141), a pushing cylinder (15) is provided on one side of the sealing plate (141), the pushing cylinder (15) is installed at the bottom of the bottom plate (13), the output end of the pushing cylinder (15) is fixedly connected to the sealing plate (141) through a connecting seat, a negative pressure connecting pipe (16) is provided on one side of the sand discharge port (14), and the negative pressure connecting pipe (16) is communicated with the interior of the casting sand box (1).

4. The lost foam casting device according to claim 1, characterized in that: Both ends of the third support plate (35) are fixedly connected with a plurality of fixed blocks (36), the fixed blocks (36) are arranged corresponding to the connecting bosses (112), the upper end of the fixed block (36) is installed with a spring damping assembly (37), and fixed brackets (361) are arranged on both sides of the spring damping assembly (37), the lower end of the fixed bracket (361) is fixedly connected to the fixed block (36), the upper end of the spring damping assembly (37) is slidably connected with a connecting rod (38), the top of the connecting rod (38) is rotatably connected to the locking block (39) through a fixing pin, the middle part of the locking block (39) is rotatably connected to the fixed brackets (361) on both sides thereof through a fixing pin, the locking block (39) is located above the connecting boss (112) and a non-slip pad (391) is installed at the lower end thereof.

5. The lost foam casting device according to claim 1, characterized in that: Through holes for the passage of molding sand are provided in the middle of the first support plate (31), the second support plate (33) and the third support plate (35).

6. The lost foam casting device according to claim 1, characterized in that: The model support (4) comprises a fixed frame (41), a slide rail (42) and a fixed hook (46). The fixed frame (41) is arranged in a rectangular frame. The upper ends of two sides of the fixed frame (41) are installed with slide rails (42). One end of the other two sides of the fixed frame (41) is installed with a plurality of fixed hooks (46). The upper ends of the fixed hooks (46) are fixed to the fixed frame (41) by being engaged with the top of the side plate (11).

7. The lost foam casting device according to claim 6, characterized in that: A plurality of movable rods (422) are provided above the slide rail (42), and the lower ends of both sides of the plurality of movable rods (422) are fixedly connected with sliding blocks (421), and the inner walls of the sliding blocks (421) are slidably connected to the slide rail (42), and one end of the sliding block (421) is fixedly connected with a connecting block (423), and the middle part of the connecting block (423) is threadedly connected with a bidirectional screw rod (424), and one end of the bidirectional screw rod (424) is rotatably connected to the fixed frame (41), and the other end of the bidirectional screw rod (424) is rotatably connected to the mounting block (45) mounted in the middle part of the fixed frame (41).

8. The lost foam casting device according to claim 7, characterized in that: A driving assembly (44) is provided in the middle of the bidirectional screw rod (424), and the driving assembly (44) is installed on one side of the fixed frame (41). The surface of the moving rod (422) is clamped with a plurality of clamping blocks (43), and the clamping blocks (43) provided on adjacent moving rods (422) are correspondingly provided. One side of the clamping block (43) is fixedly connected with a clamping block (431), and the inner side of the clamping block (431) is arranged in an arc shape and is connected with a rubber pad (432). The other side of the clamping block (43) is threadedly connected with a plurality of quick-release bolts (433), and one end of the quick-release bolt (433) extends to the inside of the clamping block (43) and abuts against a clamping groove (4221) provided on the surface of the moving rod (422).

9. The lost foam casting device according to claim 8, characterized in that: The driving assembly (44) includes a gear box (441), a rotating rod (442), a rotating handle (443), a first bevel gear (444) and a second bevel gear (445). One side of the gear box (441) is fixedly connected to the fixed frame (41), the top of the gear box (441) is rotatably connected to the rotating rod (442), the upper end of the rotating rod (442) is rotatably connected to the rotating handle (443), the lower end of the rotating rod (442) is installed with the first bevel gear (444), one side of the first bevel gear (444) is meshed with the second bevel gear (445), and the second bevel gear (445) is fixedly installed on the surface of the bidirectional screw rod (424).

10. The lost foam casting device according to claim 9, characterized in that: A slide groove (446) is provided on the top of the gear box (441), and a locking slider (447) is slidably connected inside the slide groove (446). A wedge block (4471) is fixedly connected to the lower end of the locking slider (447). An elastic ratchet (448) is provided on one side of the wedge block (4471), and one end of the elastic ratchet (448) is fixedly connected to the inner wall of the gear box (441). The locking slider (447) moves to squeeze the elastic ratchet (448) to bend downward to lock the second bevel gear (445). An unlocking button (449) for locking the locking slider (447) is provided on one side of the locking slider (447), and a corresponding card block is provided on one side of the locking slider (447) and the lower end of the unlocking button (449).

Images