A core-pulling device for resin-bonded sand molding

Abstract

The application relates to the technical field of casting equipment, in particular to a core-pulling device for resin sand molding of castings, which is characterized in that the core-pulling device comprises a walking mechanism, a rack arranged on the walking mechanism, the walking mechanism being used for driving the rack to displace on the ground, a supporting mechanism telescopically arranged on the rack and used for abutting against the outer side of a sand box mold to support the rack, and a pulling-off mechanism movably arranged on the rack and adjacent to the supporting mechanism, the pulling-off mechanism clamping a core-pulling pipe body and pulling the core-pulling pipe body out of the sand box mold when the supporting mechanism abuts against the sand box mold. The application has the effects of saving labor cost and stably and safely pulling the core-pulling pipe body out.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, and in particular to a core-pulling device for resin sand molding of castings. Background Technology

[0002] Resin sand casting is a casting process that uses synthetic resin as a binder for sand particles. The specific process involves mixing raw sand with resin, a hardener, and other materials in a specific ratio to form resin sand. This resin sand is then used for molding and core making. The resin sand is filled into the mold box, and the resin undergoes an irreversible cross-linking reaction and solidifies through self-hardening or curing methods such as heating or blowing, providing the mold or sand core with the necessary strength. The mold and casting cavity are then formed by closing the mold box. Finally, molten metal is poured into the mold, cooled, solidified, and the sand is removed and cleaned to obtain the casting.

[0003] Currently, there is a casting structure with a flange seat containing a connecting hole. This connecting hole allows for the installation of a hinge shaft to meet rotational mounting requirements. However, this type of hole feature is difficult to form, specifically requiring parting treatment at the hole location, necessitating a three-box molding structure, which is quite complex. To address this, the inventors designed a core-pulling process. By pre-embedding a core-pulling tube in the sand mold, and after the sand mold has hardened and compacted, the core-pulling tube is extracted from the mold, and then a core-pulling tube-shaped sand core is pushed back in, thus completing the hole formation. This avoids the need for a parting surface at the hole location, simplifies the mold structure, and reduces production costs.

[0004] However, there are still many inconveniences in implementing the above process. For example, in the process of removing the core tube from the mold, manual knocking or forklift is usually used. However, the above process requires a lot of force and the pulling process is not stable enough. It may cause the mold to tip over or be damaged, resulting in insufficient safety and unstable mold quality. Therefore, there is still a lack of a solution that can smoothly and safely remove the core tube, so it needs to be improved.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Summary of the Invention

[0006] This invention provides a core-pulling device for resin sand molding of castings to solve the problems existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A core-pulling device for resin sand molding of castings, comprising:

[0009] Walking mechanism;

[0010] A frame is mounted on the traveling mechanism, which is used to move the frame on the ground.

[0011] A support mechanism, telescopically mounted on the frame, is used to abut against the outside of the sand box mold to support the frame;

[0012] The extraction mechanism is movably mounted on the frame and adjacent to the support mechanism. When the support mechanism comes into contact with the sand box mold, the extraction mechanism clamps the core-pulling tube and pulls the core-pulling tube out of the sand box mold.

[0013] Preferably, the extraction mechanism includes:

[0014] A rotating assembly is mounted on the frame;

[0015] A core-pulling rod is horizontally slidably mounted on the rotating assembly, which is used to drive the core-pulling rod to rotate.

[0016] A drive assembly is disposed on the rotating assembly and connected to the core-pulling rod, the drive assembly being used to drive the core-pulling rod to reciprocate;

[0017] And a clamping assembly, located at one end of the core-pulling rod, for clamping the core-pulling tube body.

[0018] Preferably, the rotating component includes:

[0019] A turntable is rotatably mounted on the frame, and a first sliding hole is provided through the center of the turntable for the core-pulling rod to slide.

[0020] A first motor is mounted on the frame;

[0021] And a first gear, which is connected to the output shaft of the first motor, and the edge of the turntable is provided with a first meshing tooth, and the first gear meshes with the first gear.

[0022] Preferably, the driving component includes:

[0023] A threaded sleeve, rotatably mounted on the rotating assembly, has an internal thread, and the core-pulling rod has an external thread that meshes with the internal thread;

[0024] The second gear is fixedly mounted on the threaded sleeve;

[0025] The third gear is rotatably mounted on the rotating assembly and meshes with the second gear;

[0026] A second motor is disposed on the rotating assembly, and the third gear is connected to the second motor, the second motor being used to drive the third gear to rotate.

[0027] The preferred clamping assembly includes:

[0028] The chuck module is fixedly mounted on the core-pulling rod;

[0029] And a control motor, connected to the chuck module, for driving the chuck module to open, close, start and stop, so as to clamp the core-pulling tube body.

[0030] Preferably, the support mechanism includes:

[0031] A support frame, which slides horizontally on the frame, is used to abut against the sand box mold;

[0032] And a telescopic cylinder is provided on the frame and connected to the support frame, for driving the support frame to reciprocate.

[0033] Preferably, the support frame includes;

[0034] The frame has at least two legs, and a second sliding hole is provided on the frame for the legs to slide.

[0035] The frame includes a support body, with one end of each of the multiple legs fixedly connected to the frame body, and the support telescopic cylinder connected to the frame body.

[0036] Preferably, the rack includes:

[0037] The columns must consist of at least two parallel columns.

[0038] A lifting platform is slidably mounted on a column, and a lifting linear module is mounted on the column. The lifting platform is connected to the lifting linear module, and the lifting linear module is used to drive the lifting platform to move up and down. The support mechanism and the extraction mechanism are respectively mounted on the lifting platform.

[0039] Preferably, it further includes a turntable mechanism, which is disposed on the traveling mechanism, and the frame is disposed on the turntable mechanism. The turntable mechanism is used to drive the frame to rotate along a vertical axis.

[0040] Preferably, the walking mechanism is a tracked chassis assembly.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The casting resin sand molding core-pulling device provided by this invention, driven by the traveling mechanism, can bring the core-pulling device close to and align with the core-pulling tube. At this time, the support mechanism abuts against the sand box mold through telescopic movement to provide support. Then, by activating the extraction mechanism, the core-pulling tube is clamped and automatically extracted. Throughout the process, because the support mechanism supports the sand box mold, the core-pulling tube is less likely to cause displacement or tilting of the sand box mold during extraction, making it safer to use. In addition, the displacement adjustment in the early stage allows the extraction mechanism to be aligned with the core-pulling tube, and the clamping and reciprocating extraction method makes the core-pulling tube removal process more continuous and stable, achieving the effect of smoothly and safely extracting the core-pulling tube.

[0043] The present invention has other features and advantages, which will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a core-pulling device for resin sand molding of castings provided in a preferred embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the structure of the casting resin sand molding mold and the core-pulling tube provided in a preferred embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the casting resin sand molding core-pulling device provided in a preferred embodiment of the present invention from another perspective.

[0048] Figure 4 This is a schematic diagram of the extraction mechanism provided in a preferred embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the extraction mechanism provided in a preferred embodiment of the present invention from another perspective;

[0050] Figure 6 This is a schematic diagram of the structure of a clamping assembly provided in a preferred embodiment of the present invention.

[0051] Figure label:

[0052] 1001. Mold body; 1002. Hinge seat forming part; 1003. Core pulling tube body;

[0053] 1. Walking mechanism; 11. Load-bearing platform;

[0054] 2. Frame; 21. Column; 22. Lifting platform; 221. Second sliding hole; 222. Mounting hole; 23. Lifting linear module;

[0055] 3. Support mechanism; 31. Support frame; 311. Support leg; 312. Frame body; 32. Support telescopic cylinder;

[0056] 4. Extraction mechanism; 41. Rotating assembly; 411. Turntable; 4111. First sliding hole; 412. First motor; 413. First gear; 42. Core-pulling rod; 43. Drive assembly; 431. Threaded sleeve; 432. Second gear; 433. Third gear; 434. Second motor; 44. Clamping assembly; 441. Chuck module; 442. Control motor;

[0057] 5. Turntable mechanism; 6. Limiting groove; 7. Limiting boss. Detailed Implementation

[0058] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0059] In the description of this invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present simultaneously. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be an intermediate component present simultaneously.

[0060] Furthermore, terms such as “long,” “short,” “inner,” and “outer” indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the purpose of describing the present invention and are not intended to indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of the present invention.

[0061] The following is in conjunction with the appendix Figure 1-6 The technical solution of the present invention will be further illustrated through specific embodiments.

[0062] Reference Figure 1 This embodiment provides a core-pulling device for resin sand molding of castings, including a traveling mechanism 1, a frame 2, a support mechanism 3, and a extraction mechanism 4; wherein, the frame 2 is disposed on the traveling mechanism 1 and located on top of the traveling mechanism 1, the frame 2 is used to provide an installation position for the support mechanism 3 and the extraction mechanism 4, and the traveling mechanism 1 is used to drive the frame 2 to move on the ground, thereby indirectly driving the support mechanism 3 and the extraction mechanism 4 to move.

[0063] Based on this, Figure 2 A resin sand molding mold structure for castings is demonstrated, primarily used for forming sand box molds. The mold structure mainly includes a mold body 1001, which has a hinge seat forming part 1002. A core-pulling tube 1003 is inserted into the hinge seat forming part 1002. During the mold forming process, the core-pulling tube 1003 is first inserted into the hinge seat forming part 1002. Then, a sand box is fitted onto the outside of the mold body 1001. Resin sand is then filled and compacted inside the sand box. After the resin sand hardens, the contour surface of the casting is obtained under the support of the mold body 1001. Subsequently, the core-pulling tube 1003 is removed from the sand box mold, and then a sand core is pushed in to form the hole features of the mold.

[0064] During this process, the traveling mechanism 1 can drive the support mechanism 3 and the extraction mechanism 4 to be positioned opposite to the sand box mold to achieve alignment. The support mechanism 3 is telescopically mounted on the frame 2. It should be noted that since the core-pulling tube 1003 is usually set in the horizontal direction, the extension and retraction direction of the support mechanism 3 is consistent with the setting direction of the core-pulling tube 1003. That is to say, the extension and retraction direction of the support mechanism 3 is also set in the horizontal direction.

[0065] Based on this, the extraction mechanism 4 is movably mounted on the frame 2 and is arranged adjacent to the support mechanism 3. When the support mechanism 3 comes into contact with the sand box mold, the extraction mechanism 4 clamps the core-pulling tube 1003 and pulls the core-pulling tube 1003 out of the sand box mold, replacing the manual tube-pulling method and reducing manual labor. Furthermore, under the action of the support mechanism 3, it comes into contact with the outside of the sand box mold through telescopic movement, which can also provide certain support for the frame 2, reducing the possibility of displacement or tilting of the sand box mold during the core-pulling process. The extraction mechanism 4 can work stably and safely.

[0066] Continue to refer to Figure 1 To improve the flexibility of the core-pulling device during displacement, in this embodiment, the walking mechanism 1 adopts a tracked chassis assembly. The tracked chassis assembly can bear heavy loads and is suitable for complex terrain. It can effectively drive the frame 2, support mechanism 3 and extraction mechanism 4 to move, thus meeting the actual use requirements.

[0067] In other embodiments, a rail flatcar solution can be used to replace the tracked chassis assembly solution. Here, the tracked chassis assembly is more flexible in movement, while the rail flatcar solution can provide core pulling operations for different sand box molds in sequence through a preset track. Its positioning is more efficient and faster, and multiple sand box molds only need to be hoisted to the side of the track in sequence. Here, regardless of the structure of the traveling mechanism 1, any solution that can drive the device to move can be tried, and no specific restrictions are made here.

[0068] Based on this, a support platform 11 is also provided on the top of the walking mechanism 1, and the frame 2 is set on the support platform 11. The support platform 11 serves to provide an installation position for the frame 2. In one embodiment, the support platform 11 can be directly fixedly installed on the tracked chassis assembly, which is simpler and less costly. Furthermore, in practical applications, the sand box casting mold may be slightly offset when placed. Therefore, to facilitate the adjustment of the core-pulling direction of the core-pulling device, the core-pulling device also includes a turntable mechanism 5.

[0069] Continue to refer to Figure 1 The turntable mechanism 5 is mounted on the traveling mechanism 1, and the frame 2 is mounted on the turntable mechanism 5. Specifically, in this embodiment, the turntable mechanism 5 mainly includes a slewing bearing (not shown in the figure) and a slewing drive module (not shown in the figure). The slewing bearing mechanism 3 includes an outer ring and an inner ring. Multiple steel balls and retainers are installed between the outer ring and the inner ring. The outer ring is fixedly mounted on the bearing platform 11, and the inner ring is fixedly mounted on the track chassis assembly. Under the action of the slewing bearing, the bearing platform 11 can rotate relative to the track chassis assembly.

[0070] The rotary drive module mainly includes components such as a worm, a gear ring, and a motor. The motor is fixedly mounted on the support platform 11, and the worm is rotatably mounted on the support platform 11 and connected to the motor, so that the motor can drive the worm to rotate. At the same time, the gear ring is fixedly mounted on the outer ring, and worm gear teeth that mesh with the worm are provided on the gear ring. Based on the above structural configuration, under the drive of the worm, the outer ring can be driven to rotate through the gear ring, thereby achieving the effect of rotating the support platform 11.

[0071] It should be noted that the gear ring, slewing bearing and other components are all horizontally arranged, which can drive the bearing platform 11 to rotate along a vertical axis, thereby driving the frame 2, support mechanism 3 and extraction mechanism 4 to rotate along the vertical axis, thereby adjusting the orientation of support mechanism 3 and extraction mechanism 4, which is conducive to more flexible and accurate alignment of the end of core tube 1003.

[0072] Reference Figure 1 and Figure 3Furthermore, in different sand molds, the position and height of the core-pulling tube 1003 will vary due to different designs. In order to meet different core-pulling requirements, the frame 2 has a lifting and adjusting function.

[0073] Specifically, the frame 2 mainly includes two parts: a column 21 and a lifting platform 22. The column 21 is vertically arranged and its bottom end is fixedly connected to the support platform 11. In order to ensure that the support has a stable support effect, the number of columns 21 is at least two parallel to each other. In this embodiment, two columns are selected as an example, and the two columns 21 are arranged on opposite sides of the support platform 11. In addition, the lifting platform 22 has a flat plate structure in this embodiment. The lifting platform 22 is vertically arranged and slidably mounted on the column 21. Typically, a guide rail and a slider can be installed between the lifting platform 22 and the column 21. Driven by the guide rail and the slider, the lifting platform 22 can slide on the column 21.

[0074] Based on this, a lifting linear module 23 is installed at the column 21. The lifting linear module 23 can be a linear module structure driven by a lead screw, and its specific structure will not be described in detail here. By connecting the lifting platform 22 to the lifting linear module 23, the lifting platform 22 can be driven to move up and down under the action of the lifting linear module 23, thereby realizing the lifting adjustment function.

[0075] Optionally, in other embodiments, the lifting linear module 23 can be replaced with a hydraulic cylinder or a pneumatic cylinder, which can output reciprocating drive. Any component that can output reciprocating movement can be tried, and no specific limitation is made here.

[0076] With the above structural configuration, the support mechanism 3 and the extraction mechanism 4 are mounted on the lifting platform 22. By driving the lifting platform 22 to move, the support mechanism 3 and the extraction mechanism 4 can be adjusted in height, thereby enabling the extraction of the core tube 1003 located at different heights. The structural flexibility of the device during tube extraction is optimized and improved.

[0077] Reference Figure 3 The support mechanism 3 includes a support frame 31 and a support telescopic cylinder 32, wherein the support frame 31 is horizontally slidably disposed on the frame 2 and is used to abut against the sand box mold.

[0078] Specifically, the support frame 31 includes legs 311 and a frame 312. The number of legs 311 is at least two, but can be two, three, or four, etc., without specific limitations. In this scheme, the number of legs 311 is set to four as an example. The four legs 311 are arranged in a rectangular pattern on the lifting platform 22. When the legs 311 are installed, a second sliding hole 221 is first opened through the lifting platform 22 of the frame 2. The second sliding hole 221 is adapted to the outline size of the legs 311. The legs 311 pass through the second sliding hole 221, and the hole wall of the second sliding hole 221 slides and abuts against the legs 311. Under the guidance of the second sliding hole 221, the legs 311 can slide along the horizontal direction.

[0079] Meanwhile, the frame 312 is fixedly connected to one end of multiple legs 311, and the frame 312 acts as a series connection, enabling the multiple legs 311 to be connected under force and form a stable frame structure. In this embodiment, the frame 312 has a square frame structure, and the frame 312 is fixedly connected to the four legs 311 respectively. On this basis, the support telescopic cylinder 32 is fixedly installed on the lifting platform 22, and the telescopic rod of the support telescopic cylinder 32 is fixedly connected to the frame 312. By activating the support telescopic cylinder 32, the frame 312 can be driven to move back and forth, and the frame 312 drives the legs 311 to move when it moves.

[0080] Optionally, the support telescopic cylinder 32 in this embodiment is a hydraulic telescopic cylinder. The hydraulic telescopic cylinder provides greater support power and can drive the frame 312 to move, thereby driving the support leg 311 to move until the support leg 311 abuts against the side of the sand box mold to achieve the support function. The action is simple and efficient, and the support effect is stable.

[0081] Reference Figures 3 to 5 With the support mechanism 3 supporting the frame 2, the core tube 1003 is then extracted by the extraction mechanism 4.

[0082] The extraction mechanism 4 includes a rotating assembly 41, a core-pulling rod 42, a driving assembly 43, and a clamping assembly 44. The rotating assembly 41 is mounted on the lifting platform 22 of the frame 2. The core-pulling rod 42 is horizontally slidably mounted on the rotating assembly 41, and the length direction of the core-pulling rod 42 is parallel to that of the support leg 311. The rotating assembly 41 is used to drive the core-pulling rod 42 to rotate.

[0083] Meanwhile, the drive assembly 43 is mounted on the rotating assembly 41 and connected to the core-pulling rod 42. The drive assembly 43 is used to drive the core-pulling rod 42 to move back and forth. Under the combined action of the drive assembly 43 and the rotating assembly 41, the core-pulling rod 42 can achieve reciprocating movement and rotation.

[0084] At this time, the clamping component 44 is set at one end of the core-pulling rod 42. The clamping component 44 is used to clamp the core-pulling tube 1003, so that the core-pulling tube 1003 can be rotated and pulled out. Compared with the single pulling action, the combination of rotation action can help the core-pulling tube 1003 to loosen from the sand box mold, and the core-pulling tube 1003 can be pulled out more easily and smoothly, and it is not easy to damage the sand box mold.

[0085] Reference Figure 4 and Figure 5 To drive the core-pulling rod 42 to rotate, the rotating assembly 41 mainly includes a turntable 411, a first motor 412, and a first gear 413. In a specific configuration, the turntable 411 is first rotatably mounted on the lifting platform 22 of the frame 2. In a specific configuration, a circular mounting hole 222 can be provided through the middle of the lifting platform 22, and the turntable 411 is accommodated in the mounting hole 222. Then, a thrust bearing is installed between the hole wall of the mounting hole 222 and the turntable 411, so that the turntable 411 can be rotated and mounted.

[0086] Meanwhile, a first sliding hole 4111 is provided through the center of the turntable 411, and the core-pulling rod 42 is slidably disposed at the turntable 4111 through the first sliding hole 4111. The opening size of the first sliding hole 4111 is adapted to the core-pulling rod 42. In this embodiment, the core-pulling rod 42 has a cylindrical structure, and correspondingly, the core-pulling hole is also circular. By inserting the core-pulling rod 42 into the first sliding hole 4111, the wall of the first sliding hole 4111 abuts against the core-pulling rod 42, thereby guiding the core-pulling rod 42, which can slide back and forth within the first sliding hole 4111.

[0087] Furthermore, to prevent slippage between the core-pulling rod 42 and the turntable 411, a limiting groove 6 can be integrally provided on the outer circumferential surface of the suction rod. The limiting groove 6 extends along the length direction of the core-pulling rod 42. At the same time, a limiting boss 7 is integrally provided on the wall of the first sliding hole 4111, and the limiting groove 6 allows the limiting boss 7 to be inserted. Based on the above configuration, the mutual abutment between the limiting boss 7 and the limiting groove 6 can prevent the core-pulling rod 42 from rotating relative to the turntable 411, thus limiting the core-pulling rod 42 to slide back and forth relative to the turntable 411. The stability of the core-pulling rod 42 during displacement is optimized and improved.

[0088] Meanwhile, the first motor 412 and the first gear 413 drive the turntable 411 to rotate, thereby controlling the rotation of the core-pulling rod 42. Specifically, in this embodiment, the first motor 412 adopts a hydraulic motor structure. The hydraulic motor can output a large torque, so that the core-pulling rod 42 can output a larger torque, facilitating the core-pulling action. During setup, the first motor 412 is fixedly mounted on the frame 2, and the first gear 413 is fixedly mounted on the output shaft of the first motor 412. The first motor 412 can drive the first gear 413 to rotate in both directions. At the same time, a first meshing tooth is integrally provided on the outer peripheral edge of the turntable 411. There are multiple first meshing teeth, which are arranged sequentially and spaced along the circumference of the turntable 411. The first gear 413 meshes with the first meshing teeth. By starting the first motor 412, the turntable 411 can be indirectly driven to rotate under the action of the first gear 413 and the first meshing teeth, ultimately driving the core-pulling rod 42 to rotate.

[0089] Reference Figure 5 To control the reciprocating movement of the core-pulling rod 42 on the turntable 411, the drive assembly 43 includes a threaded sleeve 431, a second gear 432, a third gear 433, and a second motor 434. The threaded sleeve 431 is rotatably mounted on the rotating assembly 41. In a specific configuration, one end of the threaded sleeve 431 is rotatably mounted on the turntable 411 of the threaded assembly via a bearing, and the threaded sleeve 431 is coaxially arranged with the core-pulling rod 42. Furthermore, the inner wall of the threaded sleeve 431 has an internal thread, and the outer wall of the core-pulling rod 42 has an external thread that meshes with the internal thread. Therefore, by rotating the threaded sleeve 431, the core-pulling rod 42 can be driven to reciprocate on the turntable 411.

[0090] Meanwhile, to drive the threaded sleeve 431 to rotate, the second gear 432 is fixedly mounted on the threaded sleeve 431, and the third gear 433 is rotatably mounted on the turntable 411 of the rotating assembly 41. Typically, the second gear 432 can be fixedly connected to the threaded sleeve 431 through a keyway structure. The third gear 433 can be mounted on a rotating shaft during installation and rotatably mounted on the turntable 411 through the rotating shaft. The third gear 433 is adjacent to the second gear 432, and the second gear 432 and the third gear 433 mesh with each other. Next, the second motor 434 is fixedly mounted on the turntable 411 of the rotating assembly 41, and the third gear 433 is fixedly mounted on the output shaft of the second motor 434. Accordingly, in this embodiment, the second motor 434 also adopts a hydraulic motor structure to output sufficient torque.

[0091] Based on the above structure, the second motor 434 can drive the third gear 433 to rotate, the third gear 433 drives the second gear 432 to rotate, and the second gear 432 drives the threaded sleeve 431 to rotate. During the rotation of the threaded sleeve 431, as the output torque of the second motor 434 is adjusted in direction, the core-pulling rod 42 can be pushed to slide back and forth in the first sliding hole 4111.

[0092] It should be noted that when the core-pulling rod 42 is provided with external threads, its surface may be relatively rough. In this case, multiple sets of mutually cooperating limiting bosses 7 and limiting grooves 6 can be provided to provide sliding guidance for the core-pulling rod 42, so as to meet the requirement of smooth sliding of the core-pulling rod 42. The specific number of limiting bosses 7 and limiting grooves 6 can be three, four or five sets, and no specific limitation is made here. In this embodiment, four sets are selected for demonstration.

[0093] Optionally, a reducer (not shown in the figure) can be used to connect the second motor 434 and the third gear 433. Under the action of the reducer, the torque output can be made more stable.

[0094] Reference Figure 6 The clamping component 44 is disposed at one end of the core-pulling rod 42. When one end of the core-pulling rod 42 approaches the core-pulling tube 1003, the clamping component 44 clamps the core-pulling tube 1003. Under the rotation and displacement guidance of the core-pulling rod 42, the core-pulling tube 1003 is pulled out.

[0095] Specifically, the clamping assembly 44 includes a chuck module 441 and a control motor 442. The chuck module 441 adopts a three-jaw chuck structure, the specific structure and principle of which will not be described in detail here. In addition, the chuck module 441 can be fixedly installed at the end of the core-pulling rod 42 by means of a flange connection, which can make the connection between the two more secure.

[0096] Meanwhile, the control motor 442 is fixedly mounted on the flange and connected to the chuck module 441. Specifically, an input shaft is usually provided at the three-jaw chuck. By adding a coupling between the output shaft and the output shaft of the control motor 442, the connection between the chuck module 441 and the control motor 442 can be realized. By starting the control motor 442, the chuck module 441 can be driven to open, close, start and stop to clamp the core-pulling tube 1003.

[0097] The implementation principle of this embodiment is as follows: Before performing the core pulling action, the core pulling device can be driven close to the sand box mold by the walking mechanism 1. At this time, the angle of the support mechanism 3 and the extraction mechanism 4 can be adjusted by starting the turntable mechanism 5. Then, the lifting linear module 23 is started to adjust the height of the support mechanism 3 and the extraction mechanism 4 so that the support mechanism 3 is aligned with the sand box mold and the extraction mechanism 4 is aligned with the core pulling tube body 1003.

[0098] Then, the support mechanism 3 is activated, causing the support leg 311 to extend and abut against the sand box mold, thus supporting and reinforcing the frame 2. The extraction mechanism 4 then uses the frame 2 as the force point to drive the core-pulling rod 42 close to the core-pulling tube 1003. Under the clamping action of the chuck module 441, the core-pulling rod 42 is reset, rotating and pulling out the core-pulling tube 1003. The whole process is efficient and fast, and the core-pulling tube 1003 can be extracted smoothly and safely.

[0099] Therefore, the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core-pulling device for resin sand molding of castings, characterized in that, include: Walking mechanism (1); A frame (2) is mounted on the walking mechanism (1), which is used to drive the frame (2) to move on the ground; The support mechanism (3) is telescopically mounted on the frame (2) and is used to abut against the outside of the sand box mold to support the frame (2); And a extraction mechanism (4) is movably mounted on the frame (2) and adjacent to the support mechanism (3). When the support mechanism (3) comes into contact with the sand box mold, the extraction mechanism (4) clamps the core-pulling tube (1003) and pulls the core-pulling tube (1003) out of the sand box mold. The support mechanism (3) includes: The support frame (31) slides horizontally on the frame (2) and is used to abut against the sand box mold; And a support telescopic cylinder (32), which is provided on the frame (2) and connected to the support frame (31), for driving the support frame (31) to reciprocate; The support frame (31) includes: The support legs (311) are at least two in number, and the frame (2) is provided with a second sliding hole (221) for the support legs (311) to slide. The frame (312) is provided, with one end of each of the multiple legs (311) fixedly connected to the frame (312), and the support telescopic cylinder (32) is connected to the frame (312). The rack (2) includes: The columns (21) are at least two parallel to each other; The lifting platform (22) is slidably mounted on the column (21). The column (21) is provided with a lifting linear module (23). The lifting platform (22) is connected to the lifting linear module (23). The lifting linear module (23) is used to drive the lifting platform (22) to move up and down. The support mechanism (3) and the extraction mechanism (4) are respectively mounted on the lifting platform (22). It also includes a turntable mechanism (5), which is mounted on the walking mechanism (1), and the frame (2) is mounted on the turntable mechanism (5). The turntable mechanism (5) is used to drive the frame (2) to rotate along a vertical axis.

2. The casting resin sand molding core-pulling device according to claim 1, characterized in that, The extraction mechanism (4) includes: A rotating assembly (41) is mounted on the frame (2); The core-pulling rod (42) is horizontally slidably disposed on the rotating assembly (41), and the rotating assembly (41) is used to drive the core-pulling rod (42) to rotate. A drive assembly (43) is disposed on the rotating assembly (41) and connected to the core-pulling rod (42). The drive assembly (43) is used to drive the core-pulling rod (42) to reciprocate. And a clamping assembly (44) is provided at one end of the core-pulling rod (42) for clamping the core-pulling tube body (1003).

3. The casting resin sand molding core-pulling device according to claim 2, characterized in that, The rotating assembly (41) includes: A turntable (411) is rotatably mounted on the frame (2), and a first sliding hole (4111) is provided through the middle of the turntable (411) for the core-pulling rod (42) to slide. The first motor (412) is mounted on the frame (2); The first gear (413) is connected to the output shaft of the first motor (412), and the edge of the turntable (411) is provided with a first meshing tooth, and the first gear (413) meshes with the first meshing tooth.

4. The casting resin sand molding core-pulling device according to claim 2, characterized in that, The driving component (43) includes: A threaded sleeve (431) is rotatably mounted on the rotating assembly (41) and has an internal thread. The core-pulling rod (42) has an external thread that meshes with the internal thread. The second gear (432) is fixedly mounted on the threaded sleeve (431); The third gear (433) is rotatably mounted on the rotating assembly (41) and meshes with the second gear (432); A second motor (434) is disposed on the rotating assembly (41), and the third gear (433) is connected to the second motor (434), the second motor (434) being used to drive the third gear (433) to rotate.

5. The casting resin sand molding core-pulling device according to claim 2, characterized in that, The clamping assembly (44) includes: The chuck module (441) is fixedly mounted on the core-pulling rod (42); And a control motor (442) connected to the chuck module (441) to drive the chuck module (441) to open, close and start / stop, so as to clamp the core-pulling tube body (1003).

6. The casting resin sand molding core-pulling device according to claim 1, characterized in that, The walking mechanism (1) is a tracked chassis assembly.

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