Large casting resin sand molding top box drawing device

Abstract

The utility model relates to the technical field of casting tools, in particular to a large casting resin sand molding top box drawing device which is characterized by comprising a base used for placing a mold bottom plate; the fixing mechanism is arranged on the base and is used for fixing a mold bottom plate on the base; the annular track is arranged on the base; the displacement mechanism is movably arranged on the annular track and can be subjected to displacement adjustment along the annular track; and the lifting element is arranged on the displacement mechanism and is used for vertically jacking up the sand box relative to the mold bottom plate, so that the mold is separated from the sand mold, and the problems of difficulty in mold drawing, non-uniform mold drawing force and influence on the molding quality and the production efficiency of large casting resin sand molding are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of casting tooling, and in particular to a molding device for a resin sand molding top box for large castings. Background Technology

[0002] Currently, in the casting industry, resin sand manual molding generally uses special molding molds and special sand boxes. The casting mold is obtained through operations such as sand compaction, brushing and shaping, core setting and box closing. Molten metal is then poured into the casting mold, and after solidification, cooling and sand removal, the formed casting is obtained. The above molding process has good molding quality and molding efficiency, is suitable for manufacturing large metal parts, and will be indispensable for future basic equipment manufacturing.

[0003] In the sand box molding process, the mold base plate is first laid flat, and then the sand box is placed on top of the mold base plate. Next, resin sand is filled into the sand box, compacted, and leveled. After the resin sand hardens, a demolding operation is required to separate the resin sand mold in the sand box from the mold. However, during the crane lifting process, there is a large adhesive force between the resin sand in the sand box and the mold, and the demolding force is uneven, making demolding difficult. It is necessary to manually tap the mold base plate to separate the two. This process is time-consuming and labor-intensive, and may also damage the mold and sand mold, affecting the molding quality and production efficiency.

[0004] Currently, there is a need to develop and design a solution that facilitates the release of molding sand from the molding sand box, in order to meet the needs of resin sand molding production of single-piece, small-batch, medium-to-large castings.

[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. Utility Model Content

[0006] This invention provides a molding device for the top box of a large resin sand molding machine for castings, in order to solve the problems of insufficient molding quality and production efficiency in the existing technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A molding device for releasing a large resin sand molding box for castings, comprising:

[0009] The base is used to place the mold base plate;

[0010] A fixing mechanism, disposed on the base, is used to fix the mold base plate onto the base;

[0011] A circular track is provided on the base;

[0012] A displacement mechanism is movably mounted on the annular track and can be adjusted along the annular track.

[0013] And a lifting element, disposed in the displacement mechanism, for lifting the sand box vertically relative to the mold base plate.

[0014] Preferably, the fixing mechanism includes:

[0015] A first driving component is disposed on the base;

[0016] A first gripper assembly is disposed on the first drive assembly;

[0017] The first drive assembly is provided with a second gripper assembly, which is used to drive the first gripper assembly and the second gripper assembly to move closer to or further away from each other. The first gripper assembly and the second gripper assembly are used to move and clamp the opposite sides of the mold base plate.

[0018] Preferably, the first driving component includes:

[0019] A bidirectional lead screw, rotatably mounted on the base, has a first threaded section and a second threaded section;

[0020] A first slider is slidably disposed on the base and connected to the first threaded segment, and a first gripper assembly is disposed on the first slider;

[0021] The second slider is slidably disposed on the base and connected to the second threaded segment, and the second gripper assembly is disposed on the second slider;

[0022] A first motor is disposed on the base and connected to the bidirectional lead screw for driving the bidirectional lead screw to rotate.

[0023] Preferably, the displacement mechanism includes:

[0024] The mounting base is slidably disposed on the annular track, and the lifting element is fixedly disposed on the mounting base;

[0025] And a second drive component, disposed on the mounting base, for driving the mounting base to adjust its displacement on the annular track.

[0026] Preferably, the mounting base has a second sliding groove, the mounting base is slidably disposed on the annular track through the second sliding groove, and the mounting base is provided with a first roller and a second roller, the first roller slidingly abutting against the side of the annular track, and the second roller slidingly abutting against the base.

[0027] Preferably, the second driving component includes:

[0028] The second motor is fixedly mounted on the mounting base;

[0029] And a gear, which is fixedly mounted on the output shaft of the second motor, and a gear ring is provided on the annular track, and the gear meshes with the gear ring.

[0030] Preferably, the base is provided with a placement platform on top, and the top of the placement platform is a placement plane.

[0031] Preferably, the lifting element is a hydraulic telescopic cylinder.

[0032] Preferably, the number of displacement mechanisms disposed on the annular track is multiple, and the multiple displacement mechanisms are arranged at intervals.

[0033] Preferably, there are four displacement mechanisms arranged in a rectangular pattern.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The large-scale resin sand molding top box demolding device provided by this utility model first fixes the mold base plate through a fixing mechanism. On this basis, a sand box is placed on the mold base plate for sand filling and compaction. After the resin sand mold hardens, the position of the displacement mechanism on the circular track is adjusted so that the lifting element is aligned with the outer flange of the sand box. Under the lifting action of the lifting element, the sand box is lifted. The above demolding process is quick and convenient, eliminating the need to knock and damage the mold base plate during demolding, thus improving the service life of the mold base plate and increasing production efficiency. Furthermore, the displacement mechanism can be adjusted according to the size and shape of different sand boxes, allowing the lifting element to adapt to sand box structures of different sizes, meeting the demolding needs of single-piece and small-batch resin sand molding of castings.

[0036] This invention has other features and advantages that 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 this invention. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1This is a schematic diagram of the structure of the large casting resin sand molding top box demolding device provided in this embodiment of the utility model;

[0039] Figure 2 This is a structural schematic diagram from another perspective of the large casting resin sand molding top box demolding device provided in this embodiment of the utility model;

[0040] Figure 3 This is a schematic diagram of the fixing mechanism provided in an embodiment of the present utility model;

[0041] Figure 4 This is a schematic diagram of the structure of the annular track and displacement mechanism provided in this embodiment of the utility model;

[0042] Figure 5 This is a schematic diagram of the displacement mechanism provided in an embodiment of the present invention.

[0043] Figure label:

[0044] 1. Base; 11. Placement platform;

[0045] 2. Fixing mechanism; 21. First drive assembly; 211. Bidirectional lead screw; 212. First slider; 213. Second slider; 214. First motor; 22. First gripper assembly; 23. Second gripper assembly;

[0046] 3. Circular track; 31. Gear ring;

[0047] 4. Displacement mechanism; 41. Mounting base; 42. Second drive assembly; 421. Second motor; 422. Gear;

[0048] 5. Lifting element; 6. First slide rail; 7. Second slide rail; 8. First roller; 9. Second roller. Detailed Implementation

[0049] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0050] In the description of this utility model, 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 a component that is centrally positioned therein. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be a component that is centrally positioned therein.

[0051] 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 convenience of describing this utility model and do not 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 this utility model.

[0052] The following is in conjunction with the appendix Figure 1-5 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0053] Please refer to Figure 1 This utility model embodiment provides a large casting resin sand molding top box lifting device, including a base 1, a fixing mechanism 2, a ring track 3, a displacement mechanism 4, and a lifting element 5.

[0054] The base 1 is used to place the mold base plate, and the mold body is mounted on the mold base plate. In this embodiment, the base 1 has a plate-like structure, and the mold base plate can be placed directly on top of the base 1. At the same time, the fixing mechanism 2 is set on the base 1. When the mold base plate is placed on the base 1, the fixing mechanism 2 is close to the opposite sides of the mold base plate. The fixing mechanism 2 is used to fix the mold base plate on the base 1. After the mold base plate is fixed, the sand box is placed on top of the mold base plate, and resin sand is filled into the sand box. After compaction and leveling, the casting sand box is obtained. After the resin sand mold hardens, the demolding operation is performed.

[0055] At this time, the annular track 3 is fixedly set on the base 1 and located below the mold bottom plate. In this embodiment, the annular track 3 has a circular outline. Meanwhile, the displacement mechanism 4 is movably set on the annular track 3 and can be adjusted along the annular track 3.

[0056] Furthermore, the lifting element 5 is installed on the displacement mechanism 4. The displacement mechanism 4 can drive the lifting element 5 to move on the circular track 3 until the lifting element 5 moves directly below the sand box flange. After the lifting element 5 is in place, the lifting element 5 is used to lift the sand box vertically and stably relative to the mold base plate to realize the mold lifting operation.

[0057] By adopting the above scheme, under the combined action of the lifting element 5 and the fixing mechanism 2, the sand box can be separated from the mold body and the mold base plate. During the separation process, there is no need to damage the mold base plate by knocking, which improves the service life of the mold base plate and increases production efficiency. Furthermore, the displacement mechanism 4 can be adjusted according to the size and shape of different sand boxes, so that the lifting element 5 can be adapted to sand box structures of different sizes, thus meeting the demolding needs of resin sand molding of single-piece and small-batch castings.

[0058] In one embodiment provided in this example, a placement platform 11 is provided on the top of the base 1 to ensure that the mold base plate can be placed stably on the base 1. Typically, the placement platform 11 is integrally connected to the base 1 or fixedly connected to it to ensure the stability of the placement platform 11. On this basis, the top of the placement platform 11 is a placement plane, which is set horizontally. By placing the mold base plate on the placement platform 11, the mold base plate can be placed horizontally and stably with the support of the placement plane.

[0059] After the mold base plate is placed on the base 1, the fixing mechanism 2 then fixes the mold base plate on the base 1 so that the mold body and the mold base plate are not prone to displacement during the filling of resin sand, and the mold and sand mold are successfully separated during the top box demolding process.

[0060] Reference Figure 2 and Figure 3 The fixing mechanism 2 provided in this embodiment includes a first driving component 21, a first gripper component 22, and a second gripper component 23. The first driving component 21 is disposed on the base 1 and is used to output reciprocating motion in the horizontal direction. At this time, the first gripper component 22 and the second gripper component 23 are simultaneously disposed on the first driving component 21, and are respectively located on opposite sides of the mold base. The first driving component 21 is used to drive the first gripper component 22 and the second gripper component 23 to move closer or further apart from each other, and the first gripper component 22 and the second gripper component 23 are used to movably clamp the opposite sides of the mold base plate.

[0061] Preferably, in order to improve the stability of the mold base plate in the clamping state, the fixing mechanism 2 can also be set in two sets. The two sets of fixing mechanisms 2 are arranged perpendicularly to each other on the base 1, thereby clamping and fixing the mold base plate around the perimeter, ensuring that the top box lifting action is more stable. It is understood that the accompanying drawings provided in this embodiment only show the setting method of one set of fixing mechanisms 2, but the content shown in the drawings does not constitute a limitation in the actual application state of this solution.

[0062] Understandably, based on the above settings, when it is necessary to fix the mold base plate, the first drive component 21 drives the first gripper component 22 and the second gripper component 23 to move closer to each other, and the first gripper component 22 and the second gripper component 23 clamp the opposite sides of the mold base plate to achieve clamping and fixing of the mold base plate. During the sand casting process, the mold base plate is not easy to shift. When it is necessary to remove the mold base plate, it is only necessary to drive the first gripper component 22 and the second gripper component 23 away from each other, which is convenient and quick to operate.

[0063] Furthermore, continue to refer to Figure 2 and Figure 3The first drive assembly 21 specifically includes a bidirectional lead screw 211, a first slider 212, a second slider 213, and a first motor 214. The bidirectional lead screw 211 is rotatably mounted on the base 1. Specifically, in this embodiment, a first groove 6 is provided on the base 1, and the first groove 6 has a straight contour structure. The first groove 6 is an opening at the bottom of the base 1, allowing the bidirectional lead screw 211 to be installed into the first groove 6 through the bottom opening. Typically, a bearing seat can be fixedly installed in the groove, and the end of the bidirectional lead screw 211 can be fixedly installed in the bearing seat to achieve rotatable installation of the bidirectional lead screw 211. No specific installation method for the bidirectional lead screw 211 is limited here; any method that allows the bidirectional lead screw 211 to rotate can be used.

[0064] The bidirectional lead screw 211 has a first threaded section and a second threaded section, with the threads of the first threaded section and the second threaded section having opposite directions of rotation. The first slider 212 is slidably disposed on the base 1, wherein the outer contour of the first slider 212 is adapted to the shape of the first groove 6, and the surface of the first slider 212 slides against the groove wall of the first groove 6, thereby allowing the first slider 212 to slide on the base 1. A threaded hole is provided through the first slider 212, and the bidirectional lead screw 211 passes through the threaded hole. The first slider 212 is threadedly connected to the first threaded section through the first threaded hole. At this time, by rotating the bidirectional lead screw 211, the first slider 212 can be moved back and forth within the length range of the first threaded section.

[0065] Correspondingly, the second slider 213 is set in the same way as the first slider 212. The sliding structure of the second slider 213 is adapted to the first groove 6, and the second slider 213 is set on the base 1 through the first groove 6. The second slider 213 is also provided with a threaded hole, and the bidirectional lead screw 211 passes through the threaded hole. The second slider 213 is connected to the second threaded segment through the threaded hole. By rotating the bidirectional lead screw 211, the second slider 213 can move back and forth within the length range of the second threaded segment. Since the first threaded segment and the second threaded segment have opposite thread directions, when the bidirectional lead screw 211 rotates in one direction, the first slider 212 and the second slider 213 can move closer to or further away from each other.

[0066] Furthermore, the first motor 214 is fixedly installed on the base 1, and the output shaft of the first motor 214 is fixedly connected to the bidirectional lead screw 211. The first motor 214 is a servo motor, which can output forward and reverse torque. The first motor 214 can drive the bidirectional lead screw 211 to rotate, thereby enabling the first slider 212 and the second slider 213 to move closer or further away from each other.

[0067] Based on this, the first gripper assembly 22 is disposed on the first slider 212, and the second gripper assembly 23 is disposed on the second slider 213. Driven by the first slider 212 and the second slider 213, the first gripper assembly 22 and the second gripper assembly 23 can move closer or further away from each other, thereby realizing the active gripping action.

[0068] It should be noted that a first clearance opening and a second clearance opening are also provided through the base 1, which are simultaneously connected to the first slide groove 6. The first gripper assembly 22 is fixedly connected to the first slider 212 through the first clearance opening, and the second gripper assembly 23 is fixedly connected to the second slider 213 through the second clearance opening. Here, the first clearance opening and the second clearance opening can facilitate the assembly and fixing of the first gripper assembly 22 and the second gripper assembly 23. In addition, the first gripper assembly 22 and the second gripper assembly 23 can be clamping cylinder modules. Their specific structure will not be described in detail here. Any module that can clamp and fix the mold base plate can be used.

[0069] Reference Figure 4 and Figure 5 To adjust the position of the lifting element 5, the displacement mechanism 4 includes a mounting base 41 and a second drive assembly 42. In this embodiment, the mounting base 41 has a block-shaped structure and a second sliding groove 7 extending through both sides. The outline of the annular track 3 matches the second sliding groove 7, and the annular track 3 is embedded within the second sliding groove 7, slidingly abutting against the groove wall. At this time, the mounting base 41 is slidably positioned on the annular track 3. Simultaneously, the lifting element 5 is fixedly positioned on the top of the mounting base 41. When the lifting element 5 slides on the annular track 3, it can be displaced, thereby adjusting the placement position of the lifting element 5.

[0070] Furthermore, to improve the smoothness of the sliding of the mounting base 41, a first roller 8 and a second roller 9 are rotatably mounted on the mounting base 41. Specifically, the first roller 8 slides against the side of the annular track 3, and the second roller 9 slides against the base 1. At this time, under the action of the first roller 8 and the second roller 9, a rolling friction effect can be provided for the mounting base 41, making the mounting base 41 slide more smoothly.

[0071] Continue to refer to Figure 4 and Figure 5The second drive assembly 42 is disposed on the mounting base 41. The second drive assembly 42 is used to drive the mounting base 41 to adjust its displacement on the annular track 3, thereby realizing automated displacement control. Specifically, the second drive assembly 42 includes a second motor 421 and a gear 422. The second motor 421 is a servo motor, which is fixedly mounted on one side of the mounting base 41. The gear 422 is fixedly disposed on the output shaft of the second motor 421. A gear ring 31 is fixedly disposed on the inner side of the annular track 3, and the gear 422 meshes with the gear ring 31.

[0072] Based on the above structural configuration, by starting the second motor 421, the second motor 421 drives the gear 422 to rotate. During the rotation of the gear 422, it meshes with the gear ring 31, thereby pushing the mounting base 41 to move. By controlling the forward or reverse rotation of the second motor 421, the displacement adjustment function of the lifting element 5 on the circular track 3 can be realized.

[0073] Furthermore, in this embodiment, the lifting element 5 is a hydraulic telescopic cylinder. The hydraulic telescopic cylinder is connected to a hydraulic station to realize the telescopic control function. At this time, the hydraulic telescopic cylinder can provide a large thrust, which can well meet the demolding action requirements of large sand boxes.

[0074] Optionally, the number of displacement mechanisms 4 set on the circular track 3 can be multiple, and the multiple displacement mechanisms 4 are arranged at intervals. It can be understood that there can be two, four, eight or sixteen displacement mechanisms 4 on the circular track 3. The specific number of displacement mechanisms 4 can be adjusted according to actual needs. Here, there is no limit to the specific number of displacement mechanisms 4.

[0075] In this embodiment, there are four displacement mechanisms 4 arranged in a rectangular pattern. By setting four displacement mechanisms 4, the flanges located around the sand box can be lifted, so that the sand box is subjected to balanced force during demolding, is not prone to uneven load, and the demolding action is more stable and reliable.

[0076] Therefore, the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 this utility model.

Claims

1. A molding device for a large resin sand molding top box of a casting, characterized in that, include: Base (1), used to place the mold base plate; A fixing mechanism (2) is provided on the base (1) for fixing the mold base plate on the base (1); A circular track (3) is provided on the base (1); The displacement mechanism (4) is movably disposed on the annular track (3) and can be adjusted along the annular track (3); And a lifting element (5) is provided on the displacement mechanism (4) for vertically lifting the molding sand box relative to the mold base plate.

2. The large casting resin sand molding top box demolding device according to claim 1, characterized in that, The fixing mechanism (2) includes: A first drive component (21) is disposed on the base (1); The first gripper assembly (22) is disposed on the first drive assembly (21); The first drive assembly (21) and the second gripper assembly (22) are disposed on the first drive assembly (21). The first drive assembly (21) is used to drive the first gripper assembly (22) and the second gripper assembly (23) to move closer or further away from each other. The first gripper assembly (22) and the second gripper assembly (23) are used to move and clamp the opposite sides of the mold base plate.

3. The large casting resin sand molding top box demolding device according to claim 2, characterized in that, The first driving component (21) includes: A bidirectional lead screw (211) is rotatably mounted on the base (1) and has a first threaded section and a second threaded section; The first slider (212) is slidably disposed on the base (1) and connected to the first threaded segment, and the first gripper assembly (22) is disposed on the first slider (212); The second slider (213) is slidably disposed on the base (1) and connected to the second threaded section, and the second gripper assembly (23) is disposed on the second slider (213); And a first motor (214), which is disposed on the base (1) and connected to the bidirectional lead screw (211), for driving the bidirectional lead screw (211) to rotate.

4. The large casting resin sand molding top box demolding device according to claim 1, characterized in that, The displacement mechanism (4) includes: The mounting base (41) is slidably disposed on the annular track (3), and the lifting element (5) is fixedly disposed on the mounting base (41); And a second drive assembly (42), disposed on the mounting base (41), for driving the mounting base (41) to adjust its displacement on the annular track (3).

5. The large casting resin sand molding top box demolding device according to claim 4, characterized in that, The mounting base (41) is provided with a second sliding groove (7). The mounting base (41) is slidably disposed on the annular track (3) through the second sliding groove (7). The mounting base (41) is provided with a first roller (8) and a second roller (9). The first roller (8) slides against the side of the annular track (3), and the second roller (9) slides against the base (1).

6. The large casting resin sand molding top box demolding device according to claim 4, characterized in that, The second driving component (42) includes: The second motor (421) is fixedly mounted on the mounting base (41); And a gear (422) is fixedly mounted on the output shaft of the second motor (421). A gear ring (31) is provided on the annular track (3), and the gear (422) meshes with the gear ring (31).

7. The large casting resin sand molding top box demolding device according to claim 1, characterized in that, The base (1) has a placement platform (11) on top, and the top of the placement platform (11) is a placement plane.

8. The large casting resin sand molding top box demolding device according to claim 1, characterized in that, The lifting element (5) is a hydraulic telescopic cylinder.

9. The large casting resin sand molding top box demolding device according to claim 1, characterized in that, The number of displacement mechanisms (4) set on the circular track (3) is multiple, and the multiple displacement mechanisms (4) are arranged at intervals.

10. The large casting resin sand molding top box demolding device according to claim 9, characterized in that, There are four displacement mechanisms (4), and the four displacement mechanisms (4) are arranged in a rectangular pattern.

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