A pump and valve casting demolding device

Abstract

This invention relates to the field of casting equipment technology, specifically disclosing a pump and valve casting demolding device, including a recovery box. A crossbeam is fixedly installed on the recovery box, with the crossbeam near the center. A bearing structure is fixedly installed on the crossbeam, and a limiting structure is fixedly installed on the bearing structure. A loading unit is detachably installed on the bearing structure, and the loading unit is fixed by the limiting structure. A detachment structure is detachably installed on the limiting structure. Through the sealing and fitting design of the loading unit and the precise pushing design of the detachment structure, after the bottom of the box separates from the outer casing, the molding sand automatically scatters and is recovered, and the casting is smoothly moved out by the directional pushing of the pusher plate, completely solving the problem of difficult casting removal under the lost foam casting process.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically to a demolding device for casting pump and valve parts. Background Technology

[0002] Pump and valve castings are core components in fluid transportation, pressure control and other fields. Their structures often contain complex internal cavities and precision interfaces, which require extremely high casting precision and surface quality. The demolding process is a key step in the casting process of pump and valve castings. At present, the mainstream demolding method for pump and valve castings in the industry is manual demolding.

[0003] Manual demolding has significant limitations: For small and medium-sized pump and valve castings, demolding still relies on manual prying of the mold, which is not only labor-intensive and inefficient, but also difficult to control precisely. For large or complex pump and valve castings, manual demolding is even more difficult due to their weight, resulting in extremely poor applicability. In particular, since most castings are pre-embedded in lost foam casting and are located in the housing, they are even more difficult to remove. Summary of the Invention

[0004] The purpose of this invention is to provide a demolding device for pump and valve castings, so as to solve the problems of low demolding efficiency, weak adaptability and high manual labor intensity in the existing demolding technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pump and valve casting demolding device, comprising a recovery box, a crossbeam fixedly mounted on the recovery box near its center, a bearing structure fixedly mounted on the crossbeam, a limiting structure fixedly mounted on the bearing structure, a loading unit detachably mounted on the bearing structure, the loading unit being fixed by the limiting structure, and a detachment structure detachably mounted on the limiting structure; the recovery box is used to recover molding sand, the crossbeam is used to support the bearing structure suspended above the recovery box, the bearing structure is used to cooperate with the limiting structure to achieve separation or docking of the loading unit, the loading unit is used to load lost foam and molding sand, and the detachment structure is used to eject the casting after the loading unit is separated.

[0006] Preferably, the supporting structure includes a first mounting frame, a pair of vertical frames, a first set of shafts, a pair of tilting arms, a second set of shafts, a pair of lifting columns, a second mounting frame, and a third set of shafts; the first mounting frame is concave and is fixedly installed in the middle of the upper wall of the crossbeam; one end of each pair of vertical frames is vertically installed on the upper walls of both ends of the first mounting frame; both ends of the first set of shafts movably pass through one end of each vertical frame and are located between the vertical frames; both tilting arms are T-shaped, with one middle end of each pair of tilting arms movably fitted onto the first set of shafts, and the tilting arms are respectively close to the two ends of the first set of shafts corresponding to each other; both ends of the second set of shafts are movably installed between the left ends of the tilting arms; one end of each pair of lifting columns is vertically installed on the upper wall of the first mounting frame and the lifting columns correspond to the vertical frames; the second mounting frame is concave and its length at both ends is greater than that of the first mounting frame; the second mounting frame is fixedly installed between the other ends of the lifting columns and corresponds to the first mounting frame; both ends of the second mounting frame are located on the left side of the vertical frames; and the third set of shafts is fixedly installed between the two ends of the second mounting frame.

[0007] Preferably, the bearing structure further includes a first hydraulic cylinder body and a lifting unit; the two ends of the first hydraulic cylinder body are respectively movably connected to the middle of the second set of shafts and the third set of shafts, and the telescopic end of the first hydraulic cylinder body is inclined to the lower left; the lifting unit is movably mounted on the lifting column, and the lifting unit is movably connected to the right end of the tilting arm.

[0008] Preferably, the lifting unit includes a lifting platform, a fourth shaft, a pair of adapter claws, a sand removal platform, and two pairs of fans. One end of the lifting platform is movably mounted on the lifting column, and several sand leakage ports are provided in the middle of the lifting platform. The two ends of the fourth shaft are fixedly mounted between one end of the lifting platform, and the diameter of the two ends of the fourth shaft is smaller than that of the middle. Both pairs of adapter claws are L-shaped, and one end of each pair of adapter claws is movably mounted on the fourth shaft. The other ends of each pair of adapter claws are movably connected to the right end of the tilting arm. The adapter claws move up and down through the tilting arm. One end of the sand removal platform is inclined on the right side wall of the lifting platform, and the other end of the sand removal platform is horizontally located above the right end of the recovery box. One end of the sand removal platform has a mesh structure, and the two pairs of fans are symmetrically embedded in the lower wall of the other end of the sand removal platform, and an interception net is provided above the fans.

[0009] Preferably, the limiting structure includes a first limiting frame, a second limiting frame, an electric slide rail, a pair of clamping arms, a plurality of first slide seats, a plurality of fixing bolts, and a plurality of tightening screws; the first limiting frame is concave and is fixedly mounted on the right side wall of the second mounting frame; the second limiting frame is concave and has through-hole cross-shaped moving slots at both ends; the second limiting frame is fixedly mounted on the upper wall of one end of the lifting platform; the electric slide rail is fixedly mounted through both ends of the first limiting frame, and relatively movable electric slide seats are symmetrically arranged on the electric slide rail; one end of the pair of clamping arms is symmetrically arranged on the electric slide seats of the electric slide rail, and the clamping arms can move relatively; the plurality of first slide seats are movably embedded in the moving slots of the second limiting frame; the plurality of fixing bolts are movably mounted through the upper wall of the second limiting frame, and the fixing bolts are screwed into the upper wall of the first slide seats for fixation; the plurality of tightening screws are screwed into the middle of the first slide seats, and the tightening screws are through the first slide seats.

[0010] Preferably, the loading unit includes a box bottom, a sleeve box, four pairs of guide seats, and two pairs of calibration bolts; the box bottom is a rectangular box body, which is detachably mounted in the middle of the lifting platform and is clamped and fixed by a tightening screw; the sleeve box is detachably mounted between the clamping arms and is fastened to the box bottom; the two pairs of guide seats are symmetrically arranged at the four corners of the box bottom and the sleeve box, and the guide seats are relatively close to each other; the two pairs of calibration bolts are movably screwed into the middle of the guide seats at the four corners of the sleeve box, and the calibration bolts movably pass through the middle of the guide seats at the four corners of the box bottom.

[0011] Preferably, the disengagement structure includes a shifting frame, several mounting bolts, a height adjustment frame, a pair of locking bolts, a cylinder base, two pairs of adjusting screws, a second hydraulic cylinder body, and a push plate; the shifting frame is concave, and the upper wall of the shifting frame is provided with an adjusting groove; the shifting frame is detachably fastened to the middle of the second limiting frame; several mounting bolts are respectively screwed onto one side wall of the shifting frame, and the mounting bolts are tightened against the left side wall of the second limiting frame; one end of the height adjustment frame is movably inserted into the adjusting groove and can move back and forth along the adjusting groove; the other end of the height adjustment frame is provided with... A lifting groove is provided, and a pair of locking bolts are respectively screwed onto one end of the height adjustment frame, with the locking bolts pressing against the upper wall of the shifting frame. The cylinder seat is movably embedded in the lifting groove at the other end of the height adjustment frame, and the cylinder seat is located below the second mounting frame. Two pairs of adjusting screws are respectively screwed onto the four corners of the cylinder seat, and the adjusting screws are fixed against the side wall of the other end of the height adjustment frame. The main body of the second hydraulic cylinder is fixedly inserted through the middle of the cylinder seat, and the telescopic end of the main body of the second hydraulic cylinder can correspond to the sleeve box. The push plate is fixedly set on the telescopic end of the main body of the second hydraulic cylinder.

[0012] Preferably, the bottom of the box and the outer box are separated or connected by the lifting of the lifting platform.

[0013] Preferably, when the main body of the first hydraulic cylinder extends, it drives the left end of the tilting arm to descend, thereby causing the lifting platform to rise and move along the lifting column.

[0014] The present invention provides a demolding device for pump and valve castings, which has the following advantages:

[0015] 1. This invention adopts a modular design, with the load-bearing structure, limiting structure, loading unit, and detachment structure assembled by detachable connections such as bolts and sleeves. Each component is independently formed and has a clear functional division, which not only greatly reduces the difficulty of equipment installation and disassembly, but also facilitates targeted maintenance and replacement of vulnerable parts, effectively reducing maintenance downtime and lowering equipment operation and maintenance costs. At the same time, the overall structure is simple and compact. The suspended assembly of the crossbeam and the recycling bin ensures structural stability and saves installation space, adapting to different scales of production scenario layouts.

[0016] 2. The initial separation of molds, castings, and molding sand can be completed without any manual intervention, completely changing the traditional manual prying demolding operation mode. The first hydraulic cylinder drives the bearing structure to realize the automatic separation and docking of the loading unit. The electric slide rail controls the limit structure to complete the precise fixation of the loading unit. The second hydraulic cylinder drives the release structure to realize the automatic ejection of the casting. The fully mechanized operation not only avoids the problem of difficult control of the force of manual operation, but also solves the pain point that manual demolding of large and complex pump valve castings is impossible. It greatly reduces the labor intensity of operators and avoids the safety hazards that may be caused by manual operation.

[0017] 3. Through the linkage design of the tilting arm and lifting unit in the load-bearing structure, the loading unit (bottom box and outer box) can be smoothly and accurately separated and docked. The force is uniform during the separation process, which will not cause bumps or damage to the castings, thus ensuring the surface quality and casting accuracy of the castings. At the same time, the device integrates multiple processes such as molding sand filling, casting, demolding, casting ejection, and molding sand recycling into one unit, eliminating the need for additional transfer or auxiliary equipment. This significantly shortens the production cycle of a single casting and greatly improves the efficiency of batch production, especially suitable for the production needs of multiple batches and large scale of pump and valve castings.

[0018] 4. The cross-shaped moving groove of the second limiting frame in the limiting structure can realize multi-directional position adjustment of the first slide block. Combined with the telescopic adjustment of the tightening screw, it can adapt to the fixing of box bottoms of different sizes and specifications. The release structure can realize multi-dimensional position calibration of the second hydraulic cylinder body and the push plate in front and behind, up and down through the adjustment groove of the shift frame, the lifting groove of the height adjustment frame, and the height adjustment of the adjustment screw. It can accurately adapt to the ejection requirements of pump and valve castings of different structures and sizes. Whether it is a small and medium-sized simple structure casting or a large, complex internal cavity and precision interface pump and valve casting, stable demolding can be achieved, effectively broadening the application range of the equipment and reducing the equipment investment cost for the production of multi-specification products.

[0019] 5. The recycling bin, along with the sand leakage port of the lifting platform and the mesh structure of the sand removal platform, form a closed-loop recycling system. During the demolding process, the molding sand scattered can fall directly into the recycling bin through the sand leakage port. The molding sand remaining on the surface of the casting is further filtered and recycled by the sand removal platform, which greatly improves the reuse rate of molding sand resources and reduces raw material waste. At the same time, the fan under the sand removal platform can quickly cool the casting after demolding, which not only shortens the subsequent cooling time of the casting, but also blows away the fine sand particles attached to the surface of the casting, improves the surface cleanliness of the casting, lays a good foundation for subsequent processing, and indirectly ensures the quality stability of the final product.

[0020] In summary, this invention, through the sealed fitting design of the loading unit and the precise pushing design of the detachment structure, allows the molding sand to automatically scatter and be recycled after the bottom of the box separates from the outer box, and the casting is smoothly moved out by the directional pushing of the pusher plate. This completely solves the problem of difficult casting removal in the lost foam casting process, expands the application scenarios of the device in special casting processes, and provides effective technical support for the casting production of pump and valve castings with complex internal cavities and precision structures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly structure of the present invention;

[0022] Figure 2 This is a structural illustration of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembled load-bearing structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the disassembled limiting structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the disassembled structure of the loading unit of the present invention;

[0026] Figure 6 This is a schematic diagram of the detached structure of the present invention;

[0027] Figure 7 for Figure 2 Enlarged view of section A in the image;

[0028] Figure 8 for Figure 2 Enlarged view of section B in the image;

[0029] Figure 9 for Figure 2 A magnified view of section C in the image.

[0030] In the diagram: 1. Bearing structure; 11. First mounting bracket; 12. Vertical frame; 13. First shaft; 14. Tilting arm; 15. Second shaft; 16. Lifting column; 17. Second mounting bracket; 18. Third shaft; 19. First hydraulic cylinder body; 10. Lifting unit; 101. Lifting platform; 102. Fourth shaft; 103. Adapter claw; 104. Sand removal table; 105. Fan; 2. Limiting structure; 21. First limiting bracket; 22. Second limiting bracket; 23. Electric slide. 24. Rail, clamping arm, 25. First slide block, 26. Fixing bolt, 27. Tightening screw, 3. Loading unit, 31. Box bottom, 32. Box sleeve, 33. Guide seat, 34. Alignment bolt, 4. Detachment structure, 41. Positioning frame, 42. Mounting bolt, 43. Height adjustment frame, 44. Locking bolt, 45. Cylinder seat, 46. Positioning screw, 47. Second hydraulic cylinder body, 48. Push plate, 5. Positioning groove, 6. Lifting groove, 7. Moving groove, 8. Recycling box, 9. Crossbeam. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-9 This invention provides a technical solution: a pump valve casting demolding device, comprising a recovery box 8, a crossbeam 9 fixedly mounted on the recovery box 8 with the crossbeam 9 near the center, a bearing structure 1 fixedly mounted on the crossbeam 9, a limiting structure 2 fixedly mounted on the bearing structure 1, a loading unit 3 detachably mounted on the bearing structure 1, and the loading unit 3 fixed by the limiting structure 2, and a detachment structure 4 detachably mounted on the limiting structure 2; the recovery box 8 is used to recover molding sand, the crossbeam 9 is used to support the bearing structure 1 suspended above the recovery box 8, the bearing structure 1 is used to cooperate with the limiting structure 2 to realize the separation or docking of the loading unit 3, the loading unit 3 is used to load lost foam and molding sand, and the detachment structure 4 is used to push out the casting after the loading unit 3 is separated.

[0033] As a preferred embodiment, the load-bearing structure 1 further includes a first mounting frame 11, a pair of vertical frames 12, a first set of shafts 13, a pair of tilting arms 14, a second set of shafts 15, a pair of lifting columns 16, a second mounting frame 17, a third set of shafts 18, a first hydraulic cylinder body 19, and a lifting unit 10; the first mounting frame 11 is concave and is fixedly mounted on the middle of the upper wall of the crossbeam 9; one end of each pair of vertical frames 12 is vertically mounted on the upper walls of both ends of the first mounting frame 11; and both ends of the first set of shafts 13 are respectively... The movable part runs through one end of the vertical frame 12 and is located between the vertical frames 12. A pair of T-shaped tilting arms 14 are movably fitted onto the first shaft 13 at their middle ends, with the tilting arms 14 corresponding to the two ends of the first shaft 13. The two ends of the second shaft 15 are movably positioned between the left ends of the tilting arms 14. A pair of lifting columns 16 are vertically mounted on the upper wall of the first mounting frame 11 at one end, and the lifting columns 16 correspond to the vertical frames 12. The second mounting frame 17 is concave, and its two ends are long... The first mounting frame 17 is fixedly installed between the other ends of the lifting column 16, and the second mounting frame 17 corresponds to the first mounting frame 11. The two ends of the second mounting frame 17 are located on the left side of the vertical frame 12. The third set of shafts 18 is fixedly installed between the two ends of the second mounting frame 17. The two ends of the first hydraulic cylinder body 19 are movably connected to the middle of the second set of shafts 15 and the third set of shafts 18, respectively. The telescopic end of the first hydraulic cylinder body 19 is tilted to the lower left. The lifting unit 10 is movably installed on the lifting column 16, and the lifting unit 10 is movably connected to the right end of the tilting arm 14. The vertical frame 12 and the lifting column 16 are used for the connection between the first mounting frame 11 and the second mounting frame 17. The lifting column 16 carries the lifting unit 10 to move up and down. Through the telescopic extension of the first hydraulic cylinder body 19, the two ends of the tilting arm 14 are tilted, thereby applying force to the lifting unit 10. When the first hydraulic cylinder body 19 extends, it drives the left end of the tilting arm 14 to descend, thereby driving the lifting platform 101 to rise and move along the lifting column 16.

[0034] More specifically, the load-bearing structure 1 is the core driving component for the device to separate or connect the loading unit 3. The concave first mounting frame 11 is fixed to the middle of the upper wall of the crossbeam 9, serving as the installation base for the overall load-bearing structure 1. A pair of vertical frames 12 and a pair of lifting columns 16 are respectively vertically arranged on the upper walls at both ends of the first mounting frame 11. Together, they connect the first mounting frame 11 and the second mounting frame 17, forming a stable frame structure. The lifting columns 16 also bear the function of supporting the lifting unit 10 and guiding its lifting and moving. The two ends of the first hydraulic cylinder body 19 are respectively movably connected to the middle of the second set of shafts 15 and the third set of shafts 18, forming the core of power transmission. Through the extension and retraction of the first hydraulic cylinder body 19, the tilting arm 14 is driven to tilt around the two ends of the first set of shafts 13. The right end of the tilting arm 14 is movably connected to the lifting unit 10, and its tilting action is converted into a lifting driving force for the lifting unit 10, ultimately realizing the smooth lifting and lowering of the lifting unit 10 along the lifting column 16, providing power support for the docking or separation of the loading unit 3.

[0035] As a preferred embodiment, the lifting unit 10 further includes a lifting platform 101, a fourth shaft 102, a pair of adapter claws 103, a sand removal platform 104, and two pairs of fans 105. One end of the lifting platform 101 is movably fitted onto the lifting column 16, and several sand leakage ports are provided in the middle of the lifting platform 101. The two ends of the fourth shaft 102 are fixedly installed between one end of the lifting platform 101, and the diameter of the two ends of the fourth shaft 102 is smaller than that of the middle. Both pairs of adapter claws 103 are L-shaped, with one end of each pair of adapter claws 103 movably fitted onto the fourth shaft 102, and the other end of each pair of adapter claws 103 movably connected to the right end of the tilting arm 14. The adapter claws 103 are connected via... The tilting arm 14 moves up and down. One end of the sand removal platform 104 is inclined on the right side wall of the lifting platform 101, and the other end of the sand removal platform 104 is horizontally located above the right end of the recycling box 8. One end of the sand removal platform 104 has a mesh structure. Two pairs of fans 105 are symmetrically embedded on the lower wall of the other end of the sand removal platform 104, and an interception net is set above the fans 105. The lifting platform 101 can support the loading unit 3 and drive the bottom of the box 31 to move up and down, control separation and docking. The adapter claw 103 is connected to the fourth set of shafts 102 and the tilting arm 14 to realize the force applied to the lifting platform 101 during the tilting of the tilting arm 14, and the fans 105 provide auxiliary cooling.

[0036] More specifically, the lifting unit 10 is the core execution component of the load-bearing structure 1, and has four major functions: power transmission, loading support, sand removal and recovery, and casting cooling. One end of the lifting platform 101 is movably mounted on the lifting column 16, serving as the direct load-bearing carrier of the loading unit 3. It can support the bottom of the box 31 and move smoothly up and down with the lifting column 16, thereby controlling the separation or docking of the bottom of the box 31 and the box 32. One end of the L-shaped adapter claw 103 is movably mounted on the fourth shaft 102 of the lifting platform 101, and the other end is movably connected to the right end of the tilting arm 14. The flipping action of the flipping arm 14 can be converted into the lifting driving force of the lifting platform 101 to achieve precise power transmission; the lifting platform 101 is provided with several sand leakage ports in the middle, and the molding sand that falls during the demolding process can fall directly into the recycling box 8 below through the sand leakage ports; one end of the sand removal platform 104 is inclined and fixed to the right side wall of the lifting platform 101, and the other end extends horizontally to the top of the recycling box 8, and one end of the sand removal platform 104 is a mesh structure, so that the molding sand remaining during the casting movement can be further dropped and recycled through the mesh structure, thereby improving the molding sand recovery rate.

[0037] As a preferred embodiment, the limiting structure 2 further includes a first limiting frame 21, a second limiting frame 22, an electric slide rail 23, a pair of clamping arms 24, several first sliding seats 25, several fixing bolts 26, and several tightening screws 27; the first limiting frame 21 is concave and is fixedly mounted on the right side wall of the second mounting frame 17; the second limiting frame 22 is concave, and both ends of the second limiting frame 22 are provided with through cross-shaped moving slots 7; the second limiting frame 22 is fixedly mounted on the upper wall of one end of the lifting platform 101; the electric slide rail 23 is fixedly mounted through both ends of the first limiting frame 21, and the electric slide rail 23 is symmetrically provided with relatively movable electric sliding seats; the pair of clamping arms 24... The ends are symmetrically arranged on the electric slide blocks of the electric slide rail 23, and the clamping arms 24 can move relative to each other. Several first slide blocks 25 are movably embedded in the moving slots 7 of the second limiting frame 22. Several fixing bolts 26 movably pass through the upper wall of the second limiting frame 22 and are screwed into the upper wall of the first slide block 25 for fixation. Several tightening screws 27 are screwed into the middle of the first slide block 25 and pass through the first slide block 25. The electric slide rail 23 is supported by the first limiting frame 21, the first slide block 25 is supported by the second limiting frame 22, the position of the first slide block 25 is adjusted by the fixing bolts 26, and the box bottom 31 of different widths is adjusted by the tightening screws 27.

[0038] More specifically, the limiting structure 2 is the core component for achieving precise fixing and adaptation adjustment of the loading unit 3. Through double fixing and multi-dimensional adjustment design, it ensures the stability of the loading unit 3 during docking, separation and casting processes. The first limiting frame 21 is fixed to the right side wall of the second mounting frame 17 as the installation support for the electric slide rail 23. The second limiting frame 22 is fixed to the upper wall of one end of the lifting platform 101, and its two ends are provided with through cross-shaped moving grooves 7 to provide the first slide block 25 with space for movement and installation. Together, the two constitute the stable frame of the limiting structure 2.

[0039] As a preferred embodiment, the loading unit 3 further includes a box bottom 31, a sleeve box 32, four pairs of guide seats 33, and two pairs of alignment bolts 34. The box bottom 31 is a rectangular box, which is detachably mounted in the middle of the lifting platform 101 and is clamped and fixed by a tightening screw 27. The sleeve box 32 is detachably mounted between the clamping arms 24 and is snapped onto the box bottom 31. The two pairs of guide seats 33 are symmetrically arranged at the four corners of the box bottom 31 and the sleeve box 32. The guide seats 33 are relatively close together, and two pairs of calibration bolts 34 are respectively movably screwed into the middle of the guide seats 33 at the four corners of the housing 32. The calibration bolts 34 move through the middle of the guide seats 33 at the four corners of the bottom of the housing 31. The calibration bolts 34 pass through the guide seats 33 to achieve initial fitting, so that the bottom of the housing 31 and the housing 32 can be fitted together. Then, they are placed and separated by the limiting structure 2. The bottom of the housing 31 and the housing 32 are separated or connected by the lifting of the lifting platform 101.

[0040] More specifically, the loading unit 3 is the core carrier for loading lost foam and molding sand, and has both detachability and precise docking function. The bottom box 31 is detachably placed in the middle of the lifting platform 101 and is clamped and fixed by the tightening screw 27 of the limiting structure 2 to ensure stable position during lifting. The sleeve box 32 is detachably placed between the clamping arms 24 of the limiting structure 2 and can be precisely fastened and fitted with the bottom box 31 to form a closed loading space. Four pairs of guide seats 33 are symmetrically arranged at the four corners of the bottom box 31 and the sleeve box 32. When docking, the guide seats 33 fit together to provide positioning guidance for the bottom box 31 and the sleeve box 32. Two pairs of calibration bolts 34 are movably screwed into the middle of the guide seats 33 at the four corners of the sleeve box 32 and pass through the corresponding guide seats 33 of the bottom box 31 to realize calibration before installation.

[0041] As a preferred embodiment, further, the detachment structure 4 includes a shifting frame 41, several mounting bolts 42, an adjusting frame 43, a pair of locking bolts 44, a cylinder seat 45, two pairs of adjusting screws 46, a second hydraulic cylinder body 47, and a push plate 48. The shifting frame 41 is concave, and an adjusting groove 5 is provided on the upper wall of the shifting frame 41. The shifting frame 41 is detachably fastened to the middle of the second limiting frame 22. Several mounting bolts 42 are respectively screwed onto one side wall of the shifting frame 41, and the mounting bolts 42 are pressed against the left side wall of the second limiting frame 22. One end of the adjusting frame 43 is movably inserted into the adjusting groove 5 and can move back and forth along the adjusting groove 5. The other end of the adjusting frame 43 is provided with a lifting groove 6. A pair of locking bolts 44 are respectively screwed onto one end of the adjusting frame 43, and the locking bolts 44 are pressed against the upper wall of the shifting frame 41. The cylinder seat 45 is detachable. The cylinder seat 45 is located below the second mounting frame 17 and is embedded in the lifting groove 6 at the other end of the height adjustment frame 43. Two pairs of adjusting screws 46 are screwed to the four corners of the cylinder seat 45 and are fixed to the side wall of the other end of the height adjustment frame 43. The main body 47 of the second hydraulic cylinder is fixedly inserted through the middle of the cylinder seat 45 and the telescopic end of the main body 47 of the second hydraulic cylinder can correspond to the sleeve 32. The push plate 48 is fixedly set on the telescopic end of the main body 47 of the second hydraulic cylinder. The cylinder seat 45 is clamped on the second limit frame 22 by the shift frame 41 and fixed by the mounting bolts 42. The height adjustment frame 43 can be moved on the shift frame 41 to adjust its position by the locking bolts 44. The cylinder seat 45 supports the main body 47 of the second hydraulic cylinder. The cylinder seat 45 can be moved up and down by the adjusting screws 46 to adjust the height to match the loading unit 3.

[0042] More specifically, the detachment structure 4 is the core execution component for accurately ejecting the casting. It is detachable and has multi-dimensional adjustment functions. The shift frame 41 is installed in the middle of the second limit frame 22 by a detachable fastening method. The mounting bolt 42 on one side wall of the shift frame 41 is used to tighten the left side wall of the second limit frame 22 to achieve a stable fixation of the overall structure, providing a stable foundation for subsequent adjustment and pushing. The height adjustment frame 43 is movably inserted into the adjustment groove 5 of the shift frame 41 and can move back and forth. The locking bolt 44 is used to tighten the upper wall of the shift frame 41 to lock the position, which can be adapted to the loading unit 3 and the internal castings at different front and rear positions. The cylinder seat 45 is movably embedded in the lifting groove 6 at the other end of the height adjustment frame 43. By turning the adjustment screws 46 at the four corners of the cylinder seat 45, the cylinder seat 45 can be driven to rise and fall, thereby adjusting the overall height and ensuring a precise fit with the loading unit 3.

[0043] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0044] First, fasten the housing 32 in the loading unit 3 onto the bottom 31 of the housing, fit the guide seat 33 together, and then screw the alignment bolt 34 into the middle of the guide seat 33 on the side wall of the housing 32, so as to penetrate the middle of the guide seat 33 on the side wall of the bottom 31 of the housing and achieve a mating fit.

[0045] Then, the loading unit 3 is placed in the middle of the lifting platform 101 in the lifting unit 10, and the extension of the first hydraulic cylinder body 19 in the bearing structure 1 is initiated. The two ends of the first hydraulic cylinder body 19 are movably connected to the second set of shafts 15 and the third set of shafts 18 respectively, so that the angle can be changed as the tilting arm 14 flips on the first set of shafts 13 during the extension drive of the first hydraulic cylinder body 19.

[0046] The first hydraulic cylinder body 19 extends, causing the left end of the tilting arm 14 to descend, thereby raising the right end. The right end of the tilting arm 14 is connected to the fourth set of shafts 102 on the lifting platform 101 through the adapter claw 103, thereby driving the lifting platform 101 to rise along the lifting column 16 under force.

[0047] The third set of shafts 18 is located between the two ends of the second mounting frame 17, which is supported by the vertical frame 12 and the lifting column 16. The second mounting frame 17 fits above the first mounting frame 11, and the first mounting frame 11 is suspended above the recycling box 8 by the crossbeam 9, which is conducive to the recycling of molding sand. The second set of shafts 15 is located between the left ends of the tilting arms 14 and serves as a connection, so that the main body of the first hydraulic cylinder 19 can drive the two tilting arms 14 to tilt synchronously.

[0048] After the lifting platform 101 raises the loading unit 3, the electric slide rail 23 on the first limiting frame 21 in the limiting structure 2 can be activated, which drives the clamping arm 24 to move relative to clamp the sleeve 32, so that the sleeve 32 is centered and fixed. Then, according to the size of the sleeve 32, the first slide block 25 is moved in the moving groove 7 of the second limiting frame 22 to adjust its position. After adjustment, the first slide block 25 is fixed by the fixing bolt 26. At this time, the top tightening screw 27 can be rotated to pass through the first slide block 25 and tighten the bottom of the box 31 on both sides. Finally, the alignment bolt 34 is removed to complete the positioning and placement of the bottom of the box 31 and the sleeve 32.

[0049] Secondly, according to the casting size, install the shifting frame 41 in the detachment structure 4, and clamp the shifting frame 41 in the middle of the second limit frame 22. Then, tighten and fix it with the mounting bolts 42. Next, move the height adjustment frame 43 along the adjustment groove 5 to make the telescopic end of the second hydraulic cylinder body 47 correspond to the middle of the casting and fix it with the locking bolts 44. Finally, according to the casting height, adjust the cylinder seat 45 to move up and down in the lifting groove 6 of the jump frame, and fix the cylinder seat 45 with the adjustment screw 46 to complete the corresponding calibration settings.

[0050] At this point, some molding sand is injected into the mating sleeve 32 and the bottom 31 of the sleeve to fill the bottom 31 of the sleeve; then the lost foam is placed in the middle of the sleeve 32 to ensure that the casting is separated from the sleeve 32 when the sleeve 32 is separated from the bottom 31; once the lost foam is covered with molding sand, it can be used for casting.

[0051] After casting, the first hydraulic cylinder body 19 retracts, causing the bottom of the mold box 31 to descend and detach from the sleeve box 32. The sleeve box 32 is held and fixed above by the clamping arm 24. As the bottom of the mold box 31 detaches, the molding sand falls into the recovery box 8. At this time, the casting is located on the bottom of the mold box 31 by its own weight. The second hydraulic cylinder body 47 in the detachment structure 4 can be activated, causing the push plate 48 to move to the right and push the casting to the sand removal table 104. After the molding sand is filtered again by the sand removal table 104, the casting stops at the fan 105 and is cooled by the fan 105, completing the automatic demolding.

[0052] For reuse in casting, simply connect the bottom 31 of the casting box to the outer casing 32 again, and then add lost foam and inject molding sand.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A demolding device for pump and valve castings, characterized in that, Includes a recycling bin (8), on which a crossbeam (9) is fixedly installed, and the crossbeam (9) is close to the middle. A load-bearing structure (1) is fixedly installed on the crossbeam (9), and a limiting structure (2) is fixedly installed on the load-bearing structure (1). A loading unit (3) is detachably installed on the load-bearing structure (1), and the loading unit (3) is fixed by the limiting structure (2). A detachment structure (4) is detachably installed on the limiting structure (2). The recycling box (8) is used to recycle molding sand, the crossbeam (9) is used to support the bearing structure (1) which is suspended above the recycling box (8), the bearing structure (1) is used to cooperate with the limiting structure (2) to realize the separation or docking of the loading unit (3), the loading unit (3) is used to load lost foam and molding sand, and the detachment structure (4) is used to push out the casting after the loading unit (3) is separated; The load-bearing structure (1) includes a first mounting frame (11), a pair of vertical frames (12), a first set of shafts (13), a pair of tilting arms (14), a second set of shafts (15), a pair of lifting columns (16), a second mounting frame (17), and a third set of shafts (18). The first mounting bracket (11) is concave and is fixedly mounted on the middle of the upper wall of the crossbeam (9). One end of each of the pair of vertical brackets (12) is vertically mounted on the upper walls of both ends of the first mounting bracket (11). The two ends of the first sleeve shaft (13) movably pass through one end of each vertical bracket (12) and are located between the vertical brackets (12). The pair of flip arms (14) are both T-shaped. One end of the middle of each pair of flip arms (14) is movably mounted on the first sleeve shaft (13), and the flip arms (14) are respectively close to the two ends of the first sleeve shaft (13). The two ends of the second sleeve shaft (15) are movably mounted on the flip arms. (14) Between the left ends, one end of a pair of lifting columns (16) is respectively vertically set on the upper wall of the first mounting frame (11), and the lifting column (16) corresponds to the vertical frame (12). The second mounting frame (17) is concave, and the length of the two ends of the second mounting frame (17) is greater than that of the first mounting frame (11). The second mounting frame (17) is fixedly set between the other ends of the lifting columns (16), and the second mounting frame (17) corresponds to the first mounting frame (11). The two ends of the second mounting frame (17) are located on the left side of the vertical frame (12). The third set of shafts (18) is fixedly set between the two ends of the second mounting frame (17).

2. The pump valve casting demolding device according to claim 1, characterized in that: The load-bearing structure (1) also includes a first hydraulic cylinder body (19) and a lifting unit (10). The two ends of the first hydraulic cylinder body (19) are movably connected to the middle of the second set of shafts (15) and the third set of shafts (18), respectively, and the telescopic end of the first hydraulic cylinder body (19) is tilted to the lower left. The lifting unit (10) is movably mounted on the lifting column (16), and the lifting unit (10) is movably connected to the right end of the tilting arm (14).

3. The pump valve casting demolding device according to claim 2, characterized in that: The lifting unit (10) includes a lifting platform (101), a fourth set of shafts (102), a pair of adapter claws (103), a sand removal platform (104), and two pairs of fans (105). One end of the lifting platform (101) is movably fitted onto the lifting column (16). Several sand-draining ports are provided in the middle of the lifting platform (101). The two ends of the fourth shaft (102) are fixedly positioned between one end of the lifting platform (101). The diameter of the two ends of the fourth shaft (102) is smaller than that of the middle. A pair of adapter claws (103) are both L-shaped. One end of each pair of adapter claws (103) is movably fitted onto the fourth shaft (102), and the other end of each pair of adapter claws (103) is movably fitted onto the fourth shaft (102). The adapter claw (103) is connected to the right end of the tilting arm (14). The tilting arm (14) moves up and down. One end of the sand removal platform (104) is inclined on the right side wall of the lifting platform (101). The other end of the sand removal platform (104) is horizontally located above the right end of the recycling box (8). One end of the sand removal platform (104) is a mesh structure. Two pairs of fans (105) are symmetrically embedded on the lower wall of the other end of the sand removal platform (104). An interception net is set above the fans (105).

4. The pump valve casting demolding device according to claim 3, characterized in that: The limiting structure (2) includes a first limiting frame (21), a second limiting frame (22), an electric slide rail (23), a pair of clamping arms (24), a number of first slide blocks (25), a number of fixing bolts (26), and a number of tightening screws (27). The first limiting frame (21) is concave and is fixedly mounted on the right side wall of the second mounting frame (17). The second limiting frame (22) is concave and has through cross-shaped moving slots (7) at both ends. The second limiting frame (22) is fixedly mounted on the upper wall of one end of the lifting platform (101). The electric slide rail (23) is fixedly mounted through both ends of the first limiting frame (21) and has symmetrically arranged relatively movable electric slide blocks on the electric slide rail (23). A pair of clamping arms (2) 4) One end is symmetrically arranged on the electric slide block of the electric slide rail (23), and the clamping arm (24) can move relative to each other. Several first slide blocks (25) are respectively movably embedded in the moving groove (7) of the second limiting frame (22). Several fixing bolts (26) are respectively movably passed through the upper wall of the second limiting frame (22), and the fixing bolts (26) are screwed into the upper wall of the first slide block (25) for fixation. Several tightening screws (27) are respectively screwed into the middle of the first slide block (25), and the tightening screws (27) pass through the first slide block (25).

5. A pump valve casting demolding device according to claim 4, characterized in that: The loading unit (3) includes a box bottom (31), a box sleeve (32), four pairs of guide seats (33) and two pairs of calibration bolts (34); The bottom of the box (31) is a rectangular box. The bottom of the box (31) is detachably placed in the middle of the lifting platform (101), and the bottom of the box (31) is clamped and fixed by the tightening screw (27). The sleeve box (32) is detachably placed between the clamping arms (24), and the sleeve box (32) is fastened to the bottom of the box (31) and fits together. Two pairs of guide seats (33) are symmetrically arranged at the four corners of the bottom of the box (31) and the sleeve box (32), and the guide seats (33) are relatively close together. Two pairs of calibration bolts (34) are movably screwed to the middle of the guide seats (33) at the four corners of the sleeve box (32), and the calibration bolts (34) movably pass through the middle of the guide seats (33) at the four corners of the bottom of the box (31).

6. A pump and valve casting demolding device according to claim 5, characterized in that: The disengagement structure (4) includes a shifting frame (41), several mounting bolts (42), a height adjustment frame (43), a pair of locking bolts (44), a cylinder seat (45), two pairs of adjusting screws (46), a second hydraulic cylinder body (47), and a push plate (48). The shifting frame (41) is concave, and the upper wall of the shifting frame (41) is provided with an adjustment groove (5). The shifting frame (41) is detachably fastened to the middle of the second limiting frame (22). Several mounting bolts (42) are respectively screwed onto one side wall of the shifting frame (41), and the mounting bolts (42) are tightened against the left side wall of the second limiting frame (22). One end of the height adjustment frame (43) is movably inserted into the adjustment groove (5) and can move back and forth along the adjustment groove (5). The other end of the height adjustment frame (43) is provided with a lifting groove (6). A pair of locking bolts (44) are respectively screwed onto one end of the height adjustment frame (43), and the locking bolts are tightened against the left side wall of the second limiting frame (22). (44) Tightly pressed against the upper wall of the shifting frame (41), the cylinder seat (45) is movably embedded in the lifting groove (6) at the other end of the height adjustment frame (43), and the cylinder seat (45) is located below the second mounting frame (17). Two pairs of adjustment screws (46) are respectively screwed to the four corners of the cylinder seat (45), and the adjustment screws (46) are fixed against the side wall of the other end of the height adjustment frame (43). The second hydraulic cylinder body (47) is fixedly penetrated through the middle of the cylinder seat (45), and the telescopic end of the second hydraulic cylinder body (47) can correspond to the sleeve box (32). The push plate (48) is fixedly set on the telescopic end of the second hydraulic cylinder body (47).

7. A pump and valve casting demolding device according to claim 6, characterized in that: The bottom of the box (31) and the outer box (32) are separated or connected by the lifting of the lifting platform (101).

8. A pump valve casting demolding device according to claim 7, characterized in that: When the first hydraulic cylinder body (19) extends, it drives the left end of the tilting arm (14) to descend, thereby driving the lifting platform (101) to rise and move along the lifting column (16).

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