Automatic overturning shakeout type sand floating machine for investment casting

Abstract

The utility model discloses an automatic overturning shakeout type sand floating machine for investment casting. The automatic overturning shakeout type sand floating machine comprises a base, a sand floating machine body and an overturning mechanism. The sand floating machine body comprises a sand box and an air box which can be connected in an opening and closing mode. The air bellow is arranged below the sand box, and the air bellow and the sand box are connected to the base; the turnover mechanism comprises a driving device and a rotating assembly which are connected to the base. The rotating assembly is configured to be capable of driving the air bellow to rotate downwards relative to the sand box under the action of the driving device so as to open a preset angle with the sand box, so that materials in the sand box slide down through the inclined air bellow; under the action of a driving device, the air box can be driven to rotate upwards relative to the sand box so as to be closed with the sand box to realize closing, sand feeding and sand floating of the sand box; a worker is prevented from taking out sand from the bottom of the sand floating machine, raising the sand to the top of the sand floating machine and screening the sand into the sand floating machine through a filter screen, so that all the sand in the sand floating machine automatically leaves the sand floating machine, the labor intensity of the worker is reduced, and meanwhile, the working environment of the worker is improved.

Description

Technical Field

[0001] This application belongs to the technical field of floating sand machines, and particularly relates to an automatic flipping and sand-dropping type floating sand machine for investment casting. Background Art

[0002] In the process of making mold shells in the investment casting industry, various sand materials are adhered to the wax molds wrapped with slurry by equipment such as sand spraying machines and floating sand machines to form a layer of mold shell.

[0003] However, there are some problems with the existing floating sand machines: during the operation, since the slurry is always in a semi-solidified state, some slurry will fall into the sand material when adhering to the sand, resulting in a large amount of dry slurry with fine sand powder adhered in the sand material. The specific gravity of these dry slurries is relatively large, and they will gradually fall to the bottom of the floating sand machine, blocking the grid at the air inlet of the floating sand machine and affecting the floating sand effect; at the same time, when the large-particle dry slurry is applied, it is easy to cause the opening dimensions of products with slender holes and narrow grooves to become smaller, affecting the quality of the mold shell. In the current production mode, after the dry slurry appears, the sand is manually discharged from the equipment, a separator is placed above the floating sand machine, and then the sand is manually filtered and added to the equipment. The sand screening is performed at least twice per shift. During the process, the labor intensity of employees is high, the efficiency is low, and the dust is serious during sand screening, which has a great impact on the occupational health of employees. Summary of the Utility Model

[0004] This application provides an automatic flipping and sand-dropping type floating sand machine for investment casting to solve the problems in the above technical problems: the dry slurry gradually falls to the bottom of the floating sand machine, blocking the grid at the air inlet of the floating sand machine and affecting the floating sand effect; when the dry slurry is applied, it is easy to cause the opening dimensions of products with slender holes and narrow grooves to become smaller, affecting the quality of the mold shell; and the existing method of manually removing the sand from the floating sand machine and screening it through a separator placed above the floating sand machine causes high labor intensity, environmental dust pollution, and low work efficiency in mold shell production.

[0005] The technical solution adopted in this application is as follows:

[0006] An automatic flipping and sand-dropping type floating sand machine for investment casting, comprising a base, a floating sand machine body, and a flipping mechanism; the floating sand machine body includes a sand box and a wind box that can be connected in an openable and closable manner; the wind box is arranged below the sand box and is respectively connected to the base with the sand box; the flipping mechanism includes a driving device and a rotating assembly respectively connected to the base;

[0007] The rotating assembly is configured to be able to drive the wind box to rotate downward relative to the sand box under the action of the driving device to open a preset angle with the sand box, so that the materials in the sand box slide down through the inclined wind box; and to be able to drive the wind box to rotate upward relative to the sand box under the action of the driving device to close with the sand box to achieve the sealing, sand inlet, and floating sand of the sand box.

[0008] An automatic turning and sand - falling type floating sand machine for investment casting of the present application further has the following additional technical features:

[0009] The driving device includes a driving member and a linkage rod; the driving member has a fixed end and a moving end that moves relative to the fixed end; the fixed end of the driving member is connected to the base; the linkage rod is connected below the air box; the moving end of the driving member can be connected to the linkage rod to drive the linkage rod to move linearly, so as to drive the air box to open or close relative to the sand box.

[0010] The moving end of the driving member can be fixedly connected to the end of the linkage rod through a bearing buckle.

[0011] The rotating assembly includes a bearing assembly, a rotating bracket and a rotating shaft; the bearing assembly is connected to the sand box; one end of the rotating bracket can be connected to the air box, and the other end of the rotating bracket can be connected to the shaft end of the rotating shaft; the connecting part between the shaft ends of the rotating shaft can be rotatably connected to the bearing assembly, so that the air box can rotate relative to the sand box around the rotating shaft by a preset angle.

[0012] The rotating assembly further includes an anti - detachment member; the anti - detachment member is arranged at the shaft end of the rotating shaft and can be inserted and connected to the rotating bracket to prevent the rotating shaft from detaching from the rotating bracket.

[0013] The automatic turning and sand - falling type floating sand machine for investment casting further includes a safety locking device; the safety locking device includes a fixing plate, a driving structural member, a mounting member and a mounting locking plate; the fixing plate is connected to the sand box; the mounting locking plate is connected to the air box; the driving structural member is connected to the fixing plate; the driving structural member has a mounting member, and the mounting locking plate has a mounting hole for cooperatively connecting the mounting member, and the mounting member can move relative to the mounting hole under the driving action of the driving structural member to achieve connection or disconnection with the mounting hole.

[0014] The driving structural member has a fastening end fixedly connected to the fixing plate and a telescopic end that moves telescopically relative to the fastening end; the telescopic end is connected with the mounting member, and the telescopic end can drive the mounting member to move towards the mounting hole to connect or move away from the mounting hole to disconnect.

[0015] The fixing plate is connected to the opening of the sand box that can form an open state with the air box.

[0016] The sand box includes a sand box body, a sand box bracket and a sealing gasket; a sealing groove is formed at the bottom of the sand box, the sealing gasket is connected in the sealing groove, and the sand box body is connected to the sand box bracket and is connected to the base through the sand box bracket.

[0017] The bellow includes a bellow body, a partition net, a backing plate, a ventilation pipe and a connecting plate; the ventilation pipe is connected to the bellow body for communicating the inside of the bellow body with the outside atmosphere; the backing plate is circumferentially connected to the top of the bellow body, the partition net is connected inside the backing plate, and the connecting plate is connected to the periphery of the backing plate.

[0018] Due to the adoption of the above technical solution, the beneficial effects obtained by this application are as follows:

[0019] 1. An automatic turnover and sand-floating machine for investment casting, comprising a base, a sand-floating machine body and a turnover mechanism; the sand-floating machine body includes a sand box and a bellow that can be connected in an openable and closable manner; the bellow is arranged below the sand box and is respectively connected to the base with the sand box; the turnover mechanism includes a driving device and a rotating assembly respectively connected to the base; the rotating assembly is configured to be able to drive the bellow to rotate downward relative to the sand box under the action of the driving device to open a preset angle with the sand box, so that the materials in the sand box slide down through the inclined bellow; and to be able to drive the bellow to rotate upward relative to the sand box under the action of the driving device to close with the sand box to realize the airtightness, sand feeding and sand floating of the sand box.

[0020] The existing sand-floating machine has an integral structure. When the slurry in the sand-floating machine is always in a semi-solidified state, it will cause the slurry to adhere to the sand. Dry slurry is formed in this part of the sand with adhered slurry, resulting in blocking the air inlet at the bottom of the sand-floating machine, thus affecting the sand-floating effect. Moreover, in order to avoid the sand with dry slurry blocking the openings such as slender holes during the reuse process, resulting in unqualified mold shell production. In this application, the sand-floating machine is changed to a split structure, and the bellow located at the lower side can collect the sand dropped from the upper sand box and then tilt at a certain angle relative to the sand box, thus avoiding the traditional situation where workers have to take out the sand from the bottom of the sand-floating machine and then lift it to the top of the sand-floating machine and screen the sand into the sand-floating machine through a filter screen. This not only enables all the sand in the sand-floating machine to slide out of the sand-floating machine, realizing automation, but also reduces the labor intensity of workers, eliminating the need to lift the sand, and avoiding the environmental pollution caused by the dust diffused in the air and the harm to physical health. Cooperating with a screening machine can further realize the screening of the sand for recycling, improve the service life of the equipment and the utilization rate of energy, realize the full automation of the equipment, and further improve the user experience.

[0021] 2. As a preferred embodiment of this application, the driving device includes a driving member and a linkage rod; the driving member has a fixed end and a moving end that moves relative to the fixed end; the fixed end of the driving member is connected to the base; the linkage rod is connected below the bellow; the moving end of the driving member can be connected to the linkage rod to drive the linkage rod to move linearly, so as to drive the bellow to open or close relative to the sand box.

[0022] The driving member of the driving device is intended to be able to drive the linkage rod to generate displacement. Since the linkage rod is connected to the bottom of the air box, when the linkage rod generates displacement, it can drive the air box to generate a rotational movement relative to the sand box. Through the setting of the driving device, the linear movement of the linkage rod of the driving device can be transformed into the rotational movement of the air box relative to the sand box, so as to realize the opening of a certain angle of the air box relative to the sand box and the closing of the air box relative to the sand box. When the air box opens a certain angle relative to the sand box, an opening can be formed between the air box and the sand box, and the sand falling from the sand box enters the air box through the sand box. Since the air box forms an inclined angle after opening relative to the sand box, the sand can automatically slide down along the air box under the action of its own weight, and can cooperate with the external screening machine. The sand is input into the screening machine through the lifting mechanism from the air box for the next screening operation.

[0023] 3. As a preferred embodiment of the present application, the rotating assembly includes a bearing assembly, a rotating bracket and a rotating shaft; the bearing assembly is connected to the sand box; one end of the rotating bracket can be connected to the air box, and the other end of the rotating bracket can be connected to the shaft end of the rotating shaft; the connecting portion between the shaft ends of the rotating shaft can be rotatably connected to the bearing assembly, so that the air box can rotate relative to the sand box around the rotating shaft by a preset angle.

[0024] The bearing assembly is connected to the sand box, the rotating bracket is connected to the air box, the rotating shaft can be fixedly connected to the rotating bracket and the rotating shaft can be rotatably connected to the bearing assembly. What is realized is that when the driving device drives the linkage rod to move linearly, the air box starts to rotate relative to the sand box. Since the rotating bracket is connected to the air box, the rotating bracket can follow the air box to rotate. Since the rotating bracket is fixedly connected to the rotating shaft and the rotating shaft is rotatably connected to the bearing assembly, the air box can rotate around the rotating shaft, so as to realize that the air box can rotate relative to the sand box, and the moving angle of the air box relative to the sand box is realized according to the distance that the driving device drives the linkage rod to move linearly.

[0025] 4. As a preferred embodiment of the present application, the automatic tilting and sand dropping type floating sand machine for investment casting further includes a safety locking device; the safety locking device includes a fixing plate, a driving structural member, a mounting member and a mounting locking plate; the fixing plate is connected to the sand box; the mounting locking plate is connected to the air box; the driving structural member is connected to the fixing plate; the driving structural member has a mounting member, the mounting locking plate has a mounting hole for mating and connecting the mounting member, and the mounting member can move relative to the mounting hole under the driving action of the driving structural member to realize the connection or disconnection with the mounting hole.

[0026] The safety locking device is provided to firmly connect the bellows and the sand box under the action of the safety locking device when the bellows is closed relative to the sand box, prevent misalignment between the bellows and the sand box, further ensure the connection stability between the bellows and the sand box, and enhance the connection strength between the bellows and the sand box to avoid solely relying on the driving device to maintain the position between the bellows and the sand box, thereby further improving the overall connection strength of the floating sand machine; moreover, it can also improve the sealing performance between the bellows and the sand box. Since the bellows and the sand box are connected in a split manner, if the connection is not tight and the sealing performance is not high during the continuous opening and closing of the bellows and the sand box, sand particles, dust, etc. may enter the upper part of the bellows through the gap between the bellows and the sand box. The sand particles may cause friction between the bellows and the sand box, damage the bellows and the sand box, and affect the service life of the bellows and the sand box. Therefore, by setting the safety locking device, the sealing performance of the two can be increased, and dust and other impurities can be prevented from entering and affecting their service life.

[0027] 5. As a preferred embodiment of the present application, the fixing plate is connected to the opening of the sand box that can form an open state with the bellows.

[0028] The purpose of connecting the fixing plate to the opening where the sand box and the bellows form an open state is that the connection strength at the opening where the bellows and the sand box are formed is weak, and it is easy to generate a gap between the bellows and the sand box due to the self-weight of the bellows when the driving device is not started, resulting in easy entry of dust. Connecting the fixing plate to the opening of the sand box can further lock the connection strength between the bellows and the sand box, and ensure the connection strength and operation stability of the entire floating sand machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0030] Figure 1 It is a schematic structural diagram of an automatic turning and sand falling type floating sand machine for investment casting under an embodiment of the present application;

[0031] Figure 2 It is an internal structure diagram of the sand box of an automatic turning and sand falling type floating sand machine for investment casting under an embodiment of the present application;

[0032] Figure 3 It is a schematic structural diagram of the bellows of an automatic turning and sand falling type floating sand machine for investment casting under an embodiment of the present application;

[0033] Figure 4 It is a schematic structural diagram of the rotating assembly of an automatic turning and sand falling type floating sand machine for investment casting under an embodiment of the present application;

[0034] Figure 5 Schematic structural diagram of a safety locking device for an automatic tilting and sand dropping floating sand machine used in investment casting under an embodiment of the present application;

[0035] In the figure,

[0036] 1. Base;

[0037] 2. Sand box; 21. Sand box body; 22. Sand box support; 23. Sealing gasket;

[0038] 3. Air box; 32. Partition net; 33. Padding plate; 34. Ventilation pipe; 35. Connecting plate;

[0039] 4. Tilting mechanism; 41. Driving device; 411. Driving part; 412. Linkage rod; 42. Rotating assembly; 421. Bearing assembly; 4211. Bearing seat; 4212. Bearing; 422. Rotating bracket; 423. Rotating shaft; 424. Anti - detachment part;

[0040] 5. Safety locking device; 51. Fixed plate; 52. Driving structural part; 53. Mounting part; 54. Mounting locking plate. Detailed implementation mode

[0041] In order to more clearly explain the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings in the specification.

[0042] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0043] In addition, in the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0044] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0045] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] This application relates to an automatic turning and sand-falling type floating sand machine for investment casting, as Figures 1-5 shown, which includes a base 1, a floating sand machine body, and a turning mechanism 4; the floating sand machine body includes a sand box 2 and a wind box 3 that can be connected in an openable and closable manner; the wind box 3 is arranged below the sand box 2 and is respectively connected to the base 1 with the sand box 2; the turning mechanism 4 includes a driving device 41 and a rotating assembly 42 that are respectively connected to the base 1; the rotating assembly 42 is configured to be able to drive the wind box 3 to rotate downward relative to the sand box 2 by a preset angle to open with the sand box 2 under the action of the driving device 41, so that the materials in the sand box 2 slide down through the inclined wind box 3; and to be able to drive the wind box 3 to rotate upward relative to the sand box 2 under the action of the driving device 41 to close with the sand box 2 to achieve the sealing, sand feeding and floating sand of the sand box 2.

[0047] The existing sand floating machine is of an integrated structure. Since the slurry in the sand floating machine is always in a semi-solidified state, there will be adhered slurry on the sand, and dry slurry is formed in this part of the sand with adhered slurry, resulting in the blockage of the air inlet at the bottom of the sand floating machine, thus affecting the sand floating effect. Moreover, in order to avoid the blockage of openings such as slender holes by the sand with dry slurry during the reuse process, which leads to unqualified production of the mold shell, in this application, the sand floating machine is changed to a split structure, and the air box 3 located on the lower side can collect the sand dropped from the upper sand box 2 and then tilt at a certain angle relative to the sand box 2, thus avoiding the traditional situation where workers have to take out the sand at the bottom of the sand floating machine and then lift it to the top of the sand floating machine and screen the sand into the sand floating machine through a filter screen. This not only enables all the sand in the sand floating machine to slide off the sand floating machine, realizing automation, but also reduces the labor intensity of workers. There is no need to lift the sand anymore, avoiding the environmental pollution caused by the dust diffused in the air and the harm to physical health. Cooperating with the screening machine can further realize the screening of the sand for recycling, improve the service life of the equipment and the utilization rate of energy, realize the full automation of the equipment, and further improve the user experience.

[0048] As a preferred implementation manner, the driving device 41 includes a driving member 411 and a linkage rod 412; the driving member 411 has a fixed end and a moving end that moves relative to the fixed end; the fixed end of the driving member 411 is connected to the base 1; the linkage rod 412 is connected below the air box 3; the moving end of the driving member 411 can be connected to the linkage rod 412 to drive the linkage rod 412 to move linearly, so as to drive the air box 3 to open or close relative to the sand box 2.

[0049] The purpose of the driving member 411 of the driving device 41 is to be able to drive the linkage rod 412 to generate displacement. Since the linkage rod 412 is connected to the bottom of the air box 3, when the linkage rod 412 generates displacement, it can drive the air box 3 to rotate relative to the sand box 2. Through the setting of the driving device 41, the linear motion of the linkage rod 412 of the driving device 41 can be transformed into the rotational motion of the air box 3 relative to the sand box 2, so as to realize the air box 3 opening at a certain angle relative to the sand box 2 and the air box 3 closing relative to the sand box 2. When the air box 3 opens at a certain angle relative to the sand box 2, an opening can be formed between the air box 3 and the sand box 2, and the sand dropped from the sand box 2 enters the air box 3 through the sand box 2. Since the air box 3 forms an inclined angle after opening relative to the sand box 2, the sand can slide automatically along the air box 3 under the action of its own weight, and can cooperate with the external screening machine. The sand is transported from the air box 3 to the screening machine through the lifting mechanism for the next screening operation.

[0050] Furthermore, the moving end of the driving member 411 can be fixedly connected to the end of the linkage rod 412 through a bearing buckle.

[0051] In this application, the driving member 411 can be any one of a cylinder, a linear module, and a lead screw. Preferably, a cylinder is used to drive the linkage rod 412 in this application; the driving members 411 are symmetrically arranged on both sides of the sand box 2. As Figure 1 shown, the fixed end of the cylinder is connected to the base 1, which can be fixed or hinged, and no specific limitation is made. The purpose is that the telescopic rod of the cylinder, as the mobile end, can realize an elongation movement to drive the linkage rod 412 to move downward, so that the bellows 3 rotates around the rotation axis 423 to open a certain angle with the sand box 2, or the telescopic rod of the cylinder, as the mobile end, can realize a retraction movement to drive the linkage rod 412 to move downward to drive the bellows 3 to rotate around the rotation axis 423 to close with the sand box 2.

[0052] As a preferred embodiment, the rotating assembly 42 includes a bearing assembly 421, a rotating bracket 422, and a rotating axis 423; the bearing assembly 421 is connected to the sand box 2; one end of the rotating bracket 422 can be connected to the bellows 3, and the other end of the rotating bracket 422 can be connected to the shaft end of the rotating axis 423; the connecting portion between the shaft ends of the rotating axis 423 can be rotatably connected to the bearing assembly 421, so that the bellows 3 can rotate relative to the sand box 2 around the rotating axis 423 by a preset angle.

[0053] The bearing assembly 421 is connected to the sand box 2. The bearing assembly 421 includes a bearing seat 4211 and a bearing 4212. The bearing 4212 is connected inside the bearing seat 4211. The bearing seat 4211 is fixedly connected to one side of the sand box 2 by bolts; the rotating bracket 422 is connected to the bellows 3. The rotating axis 423 can be fixedly connected to the rotating bracket 422 and the rotating axis 423 can be rotatably connected to the bearing assembly 421. What is achieved is that when the driving device 41 drives the linkage rod 412 to move linearly, the bellows 3 starts to rotate relative to the sand box 2. Since the rotating bracket 422 is connected to the bellows 3, the rotating bracket 422 can follow the bellows 3 to rotate. Since the rotating bracket 422 is fixedly connected to the rotating axis 423 and the rotating axis 423 is rotatably connected to the bearing assembly 421, the bellows 3 can rotate around the rotating axis 423, so that the bellows 3 can rotate relative to the sand box 2, and the moving angle of the bellows 3 relative to the sand box 2 is realized according to the distance that the driving device 41 drives the linkage rod 412 to move linearly.

[0054] Furthermore, the rotating assembly 42 further includes an anti-detachment member 424; the anti-detachment member 424 is arranged at the shaft end of the rotating axis 423 and can be inserted and connected to the rotating bracket 422 for preventing the rotating axis 423 from detaching from the rotating bracket 422.

[0055] As Figure 1 and Figure 3As shown, the rotating bracket 422 has an L-shaped structure. One end of the rotating bracket 422 is fixedly connected to the sand box bracket 22 of the sand box 2 described below. The other end of the rotating bracket 422 is provided with a through hole for mounting the rotating shaft 423. The shaft end of the rotating shaft 423 is used to be fixedly connected to the rotating bracket 422, and the shaft end is mounted in the through hole of the rotating bracket 422. As Figure 4 shown, in order to prevent the rotating shaft 423 from wobbling, shifting or even falling off from the through holes on both sides of the rotating bracket 422, an anti-detachment member 424 is connected between the shaft end of the rotating shaft 423 and the rotating bracket 422. The anti-detachment member 424 is a cylindrical structure arranged along the radial direction of the rotating shaft 423. The anti-detachment member 424 can be threadedly connected to the threaded hole at the shaft end of the rotating shaft 423. The rotating bracket 422 is also provided with an anti-detachment hole, and the anti-detachment hole corresponds to the threaded hole for mounting the anti-detachment member 424. In use, after inserting the shaft end of the rotating shaft 423 into the through hole of the rotating bracket 422, rotate the rotating shaft 423 so that the threaded hole corresponds to the anti-detachment hole on the rotating bracket 422, and then insert the anti-detachment member 424 along the anti-detachment hole and thread it into the threaded hole, so that the rotating shaft 423 and the rotating bracket 422 are fixedly connected.

[0056] As a preferred embodiment, the automatic tilting and shakeout floating sand machine for investment casting further includes a safety locking device 5; as Figure 5 shown, the safety locking device 5 includes a fixing plate 51, a driving structural member 52, a mounting member 53 and a mounting locking plate 54. The fixing plate 51 is connected to the sand box 2. The mounting locking plate 54 is connected to the air box 3. The driving structural member 52 is connected to the fixing plate 51. The driving structural member 52 has a mounting member 53, and the mounting locking plate 54 has a mounting hole for fittingly connecting the mounting member 53. The mounting member 53 can move relative to the mounting hole under the driving action of the driving structural member 52 to realize connection or disconnection with the mounting hole.

[0057] It should be noted that the safety locking device 5 is arranged on both sides of the sand box 2.

[0058] The safety locking device 5 is provided to firmly connect the bellows 3 and the sand box 2 under the action of the safety locking device 5 when the bellows 3 is closed relative to the sand box 2, prevent misalignment between the bellows 3 and the sand box 2, further ensure the connection stability between the bellows 3 and the sand box 2, and enhance the connection strength between the bellows 3 and the sand box 2 to avoid solely relying on the driving device 41 to maintain the position between the bellows 3 and the sand box 2, thereby further improving the overall connection strength of the sand floating machine; moreover, it can also improve the sealing performance between the bellows 3 and the sand box 2. Since the bellows 3 and the sand box 2 are detachably connected, during the continuous opening and closing process of the bellows 3 and the sand box 2, if the connection is not tight and the sealing performance is not high, sand particles, dust, etc. may enter above the bellows 3 through the gap between the bellows 3 and the sand box 2. The sand particles may cause friction between the bellows 3 and the sand box 2, damage the bellows 3 and the sand box 2, and affect the service life of the bellows 3 and the sand box 2. Therefore, by setting the safety locking device 5, the sealing performance of the two can be increased to prevent impurities such as dust from entering and affecting their service life.

[0059] Furthermore, the driving structural member 52 has a fastening end fixedly connected to the fixing plate 51 and a telescopic end that moves telescopically relative to the fastening end; the telescopic end is connected with a mounting member 53, and the telescopic end can drive the mounting member 53 to move towards the mounting hole to connect or move away from the mounting hole to disconnect.

[0060] The driving structural member 52 can adopt a cylinder, a linear module, or other structures, and the purpose is to achieve linear motion; preferably, in this application, a cylinder is adopted. The telescopic rod of the cylinder serves as the telescopic end, and the cylinder body part of the cylinder serves as the fastening end and is connected to the fixing plate 51. The fixing plate 51 is connected to the sand box 2, and the sand box 2 is fixedly connected to the base 1. Therefore, the cylinder body part is fixed. The telescopic rod of the cylinder is connected with the mounting member 53, and the telescopic movement of the telescopic rod can drive the mounting member 53 to achieve elongation or retraction movement. Since the mounting locking plate 54 is connected to the bellows 3, the mounting hole on the mounting locking plate 54 is arranged opposite to the mounting member 53. When sand is fed into the sand box 2, the bellows 3 and the sand box 2 are in a closed state. At this time, the mounting member 53 is connected in the mounting hole. When it is necessary to unload the sand from the bellows 3, the telescopic rod of the cylinder is started to retract, and the mounting member 53 disengages from the mounting hole. At this time, the connection between the sand box 2 and the bellows 3 is disconnected. The driving member 411 of the driving device 41 drives the linkage rod 412 to move downward to drive the bellows 3 to rotate around the rotating shaft 423, thereby realizing that the bellows 3 opens at a certain angle relative to the sand box 2, so that the sand slides out of the bellows 3 and is conveyed to the screening machine on one side through the lifting mechanism for further screening.

[0061] Furthermore, the fixing plate 51 is connected to both sides of the opening of the sand box 2 that can form an open state with the bellows 3.

[0062] The fixing plate 51 is connected to the opening where the sand box 2 and the air box 3 are in an open state. The purpose is to enable the connection strength between the air box 3 and the sand box 2 at the opening to be relatively weak. It is easy to generate a gap between the air box 3 and the sand box 2 due to the self-weight of the air box 3 when the driving device 41 is not started, resulting in easy entry of dust. Connecting the fixing plate 51 to the opening of the sand box 2 can further lock the connection strength between the air box 3 and the sand box 2, ensuring the connection strength of the entire floating sand machine and the stability of operation.

[0063] As a preferred embodiment, the sand box 2 includes a sand box body 21, a sand box bracket 22, and a sealing gasket 23; a sealing groove is formed at the bottom of the sand box 2, the sealing gasket 23 is connected in the sealing groove, the sand box body 21 is connected to the sand box bracket 22, and is connected to the base 1 through the sand box bracket 22.

[0064] The sand box body 21 is connected to the base 1 through the sand box bracket 22, and the support for the sand box body 21 is enhanced through the sand box bracket 22; a sealing groove is provided on the circumferential side of the bottom of the sand box body 21, and the bottom of the sand box body 21 is sealed by filling the sealing groove with the sealing gasket 23 to prevent sand from leaking between the sand box body 21 and the air box body during the sand feeding process.

[0065] As a preferred embodiment, the air box 3 includes an air box body, a partition net 32, a backing plate 33, a ventilation pipe 34, and a connecting plate 35; the ventilation pipe 34 is connected to the air box body for communicating the inside of the air box body with the outside atmosphere; a backing plate 33 is connected along the circumference of the top of the air box body, a connecting plate 35 is connected to the circumferential side of the backing plate 33, and a partition net 32 is connected inside the backing plate 33.

[0066] The installation locking plate 54 and the rotating bracket 422 are directly connected to the air box body of the air box 3. The backing plate 33 connected to the top of the air box body is used to arrange the partition net 32. Since the sand in the sand box 2 needs to fall into the air box 3, the sand can be separated above the partition net 32 through the barrier of the partition net 32. The sand on the partition net 32 is further conveyed to the screening machine through the opened air box body for further screening. The partition net 32 has a plurality of small air-permeable holes, which together with the ventilation pipe 34 enhance the air permeability inside the air box 3. The connecting plate 35 is in an L shape, and one end of it can extend towards the sand box 2 side and protrude above the top surface of the air box body. In this application, except for the opening position formed by the air box 3 and the sand box 2, the connecting plate 35 is arranged on three sides of the air box body, aiming to play a certain blocking role to limit the sand falling from the sand box 2 from sliding off the air box body from the other three sides of the air box body, but sliding out of the air box body through the opening.

[0067] The purpose of this application is to address the problems in the current shell-making process, such as frequent generation of dry pulp, complex screening operations, high labor intensity, low efficiency, and poor operating environment. The structure of the float sand machine is adjusted and optimized to enable it to have an automatic tilting and sand-dropping function, meeting the requirements of green production, easy operation, high safety factor, reduced labor intensity, increased work efficiency, and improved operating environment. Therefore, in this application, the driving member 411 drives the air box 3 to rotate, separates from the sand box 2, and forms a certain slope, so that the sand to be filtered and screened automatically slides out and combines with the automatic lifting and screening mechanism. The lifting mechanism automatically lifts the sand to the screening mechanism for screening. The qualified sand after screening returns to the sand box 2 for continued use, and the unqualified sand is automatically separated and removed. The overall operation of this application can be controlled by a time relay to achieve automatic screening and feeding of the sand, realizing automatic operation, reducing the labor intensity of employees, increasing work efficiency, improving the operating environment, meeting the requirements of safe production, and reducing production costs.

[0068] What is not described in this application can be realized by adopting or referring to the existing technology.

[0069] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0070] The above description is only for the embodiments of this application and is not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. An automatic turning and sand falling type floating sand machine for investment casting, characterized in that, It includes a base, a sand floating machine body, and a flipping mechanism; the sand floating machine body includes a sand box and a wind box that can be connected in an openable and closable manner; the wind box is arranged below the sand box and is respectively connected to the base with the sand box; the flipping mechanism includes a driving device and a rotating assembly respectively connected to the base; The rotating assembly is configured to be able to drive the wind box to rotate downward relative to the sand box under the action of the driving device to open a preset angle with the sand box, so that the materials in the sand box slide down through the inclined wind box; And it is able to drive the wind box to rotate upward relative to the sand box under the action of the driving device to close with the sand box to realize the sealing, sand feeding, and sand floating of the sand box.

2. The automatic turning and sand-falling type floating sand machine for investment casting according to claim 1, wherein The driving device includes a driving member and a linkage rod; the driving member has a fixed end and a mobile end that moves relative to the fixed end; the fixed end of the driving member is connected to the base; the linkage rod is connected to the lower part of the wind box; the mobile end of the driving member can be connected to the linkage rod to drive the linkage rod to move in a straight line, so as to drive the wind box to open or close relative to the sand box.

3. The automatic turnover and sand falling type floating sand machine for investment casting according to claim 2, wherein, The mobile end of the driving member can be fixedly connected to the end of the linkage rod through a bearing buckle.

4. The automatic turning and sand falling type floating sand machine for investment casting according to claim 1, wherein, The rotating assembly includes a bearing assembly, a rotating bracket, and a rotating shaft; the bearing assembly is connected to the sand box; one end of the rotating bracket can be connected to the wind box, and the other end of the rotating bracket can be connected to the shaft end of the rotating shaft; the connecting part between the shaft ends on both sides of the rotating shaft can be rotatably connected to the bearing assembly, so that the wind box can rotate relative to the sand box around the rotating shaft by a preset angle.

5. The automatic turnover and shakeout type floating sand machine for investment casting according to claim 4, wherein, The rotating assembly further includes an anti-detachment member; the anti-detachment member is arranged at the shaft end of the rotating shaft and can be inserted and connected to the rotating bracket to prevent the rotating shaft from detaching from the rotating bracket.

6. The automatic turning and sand-falling type floating sand machine for investment casting according to claim 1, wherein, It also includes a safety locking device; the safety locking device includes a fixing plate, a driving structural member, a mounting member, and a mounting locking plate; the fixing plate is connected to the sand box; the mounting locking plate is connected to the wind box; the driving structural member is connected to the fixing plate; the driving structural member has a mounting member, and the mounting locking plate has a mounting hole for matingly connecting the mounting member, and the mounting member can move relative to the mounting hole under the driving action of the driving structural member to realize connection or disconnection with the mounting hole.

7. The automatic turning and sand falling type floating sand machine for investment casting according to claim 6, wherein, The driving structural member has a fastening end fixedly connected to the fixing plate and a telescopic end that moves telescopically relative to the fastening end; the telescopic end is connected with the mounting member, and the telescopic end can drive the mounting member to move towards the mounting hole to connect or move away from the mounting hole to disconnect.

8. The automatic tilting and sand-falling floating sand machine for investment casting according to claim 6, characterized in that, The fixing plate is connected to the opening of the sand box that can form an open state with the wind box.

9. The automatic turning and sand falling type floating sand machine for investment casting according to claim 1, wherein, The sand box includes a sand box body, a sand box bracket, and a sealing gasket; a sealing groove is opened at the bottom of the sand box, the sealing gasket is connected in the sealing groove, and the sand box body is connected to the sand box bracket and is connected to the base through the sand box bracket.

10. The automatic turning and sand-falling type floating sand machine for investment casting according to claim 1, characterized in that, The bellow includes a bellow body, a partition net, a backing plate, a ventilation pipe and a connecting plate; the ventilation pipe is connected to the bellow body and is used for communicating the interior of the bellow body with the atmosphere outside; the top of the bellow body is circumferentially connected with the backing plate, the partition net is connected inside the backing plate, and the connecting plate is connected to the periphery of the backing plate.

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