Sand box turnover cleaning device for lost foam casting

Abstract

The application relates to a sand box cleaning technical field, in particular to a sand box turnover cleaning device for lost foam casting, which comprises a base, a positioning turnover device arranged above the base, a double-shaft moving group and a rectangular mounting seat arranged above the double-shaft moving group, the double-shaft moving group is used for driving the rectangular mounting seat to move left and right and up and down, a negative pressure suction mechanism is arranged on the rectangular mounting seat, the negative pressure suction mechanism comprises a rectangular cover body, swing arms are hingedly arranged at four corners of the rectangular mounting seat, any swing arm and the adjacent two swing arms are symmetrically arranged, and the end, away from the rectangular mounting seat, of each swing arm is provided with the rectangular cover body. The rectangular cover body is communicated with an industrial dust collector through a suction pipe to form the negative pressure suction mechanism, the residual sand in the negative pressure holes of the negative pressure hole group A, the negative pressure hole group B and the negative pressure hole group C can be directly sucked and removed, the sand is prevented from being drilled into the deep hole or air duct due to the positive air pressure, and the problem that the cleaning difficulty is caused by air blowing in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of sand box cleaning technology, specifically to a sand box turning and cleaning device for lost foam castings. Background Technology

[0002] Lost foam casting is an advanced casting process in which a foam plastic model is embedded in dry sand without binder and compacted. The model is then heated and vaporized by pouring molten metal into the sand, causing it to disappear and occupy the space of the model to form the casting.

[0003] like Figure 14 As shown, this is a sand box for lost foam casting in the prior art. It is a rectangular box 01. There are fillers 001 at the four corners of the box 01. Each of the four fillers 001 has holes to form a negative pressure hole group A011. There are negative pressure hole groups B012 on the inner side walls of the two short sides of the box 01 and negative pressure hole groups C013 on the inner side walls of the two long sides. There are suction ports A014, B015 and C016 on the outer surface of the box 01. Suction port A014 is connected to the two negative pressure hole groups A011 through a separate air channel. Suction port B015 is connected to the two negative pressure hole groups B012 through a separate air channel. Suction port C016 is connected to the two negative pressure hole groups C013 through a separate air channel. These are used to create a vacuum during casting.

[0004] After lost foam casting, the residual molding sand in the sand box needs to be cleaned. Referring to Chinese invention patent application No. 202310942996.7, a sand box turning and cleaning device for lost foam casting is disclosed, which includes a worktable, a turning part, a clamping part, a cleaning transmission part, and a cleaning part. The turning part is fixed to the front side of the worktable, the clamping part is connected to the middle of the turning part, the cleaning transmission part is fixed to the rear side of the worktable surface, and the cleaning part is fixed to the upper part of the cleaning transmission part. This invention cleans the sand box by flipping it over and positions it using a clamp. When cleaning the negative pressure extraction block of the sand box, the cleaning workpiece fits against the side of the negative pressure extraction block. Compressed air transmitted by the air pump blows air through the conical air holes of the air jet block into the negative pressure holes of the negative pressure extraction block, thereby removing the molding sand blocking the negative pressure holes. At the same time, the cleaning scraper and roller, under the action of the pressure extension rod, can remove the debris on the surface of the negative pressure extraction block and the debris stuck in the negative pressure holes, respectively.

[0005] Because the above-mentioned device uses air blowing to remove residual molding sand in the negative pressure hole, some small-volume molding sand can easily drill into the depth of the hole or even enter the air channel of the sand box under the action of positive air pressure. This not only makes cleaning difficult, but also causes excessive accumulation of molding sand in the air channel, which will affect the vacuuming effect and thus reduce the casting quality. Summary of the Invention

[0006] The purpose of this invention is to provide a sand box turning and cleaning device for lost foam castings, which achieves cleaning by sucking up residual molding sand, effectively solving the technical problems mentioned in the background art.

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

[0008] A sand box turning and cleaning device for lost foam casting includes a base, a positioning and turning device and a dual-axis moving assembly above the base, and a rectangular mounting base above the dual-axis moving assembly. The dual-axis moving assembly is used to drive the rectangular mounting base to move left and right and up and down. The rectangular mounting base is equipped with a negative pressure suction mechanism, which includes a rectangular cover. Each of the four corners of the rectangular mounting base is hinged with a swing arm. Each swing arm is symmetrically arranged with the two adjacent swing arms. A rectangular cover is installed on the end of each swing arm away from the rectangular mounting base. The sides of each rectangular cover are connected to suction pipes. The ends of each suction pipe are connected to an industrial vacuum cleaner. A drive mechanism is provided inside the rectangular mounting base to drive the four swing arms to swing simultaneously with the same amount of force, and the swing direction of each swing arm is opposite to that of the two adjacent swing arms.

[0009] Preferably, each of the four corners of the rectangular mounting base is provided with a mounting groove, and a shaft is rotatably installed in each mounting groove. The swing arm includes a main arm and a cylinder B. Each main arm is installed on the outer periphery of the corresponding shaft, each cylinder B is fixed on the end of the corresponding main arm, and each rectangular cover is installed on the telescopic end of the corresponding cylinder B.

[0010] Preferably, the rectangular mounting base has an inner cavity, and four mounting slots communicate with the inner cavity. The drive mechanism includes a drive motor, a bidirectional threaded rod, and nut seats. The bidirectional threaded rod is rotatably mounted in the inner cavity. Two nut seats are symmetrically and slidably mounted in the inner cavity. The two nut seats are threadedly matched and fitted on both sides of the bidirectional threaded rod. The drive motor is fixed to one side of the rectangular mounting base, and its output shaft is fixedly connected to one end of the bidirectional threaded rod. Racks are fixed on both sides of the nut seats, and gears are fixedly fitted on each shaft. The racks and gears mesh one-to-one, and each main arm is fixed on the corresponding gear.

[0011] Preferably, each cylinder B has a U-shaped seat fixed on its telescopic end, and a vertically extending rotating shaft is rotatably mounted on the U-shaped seat. A drive motor is fixed on the side of each U-shaped seat, and the output shaft of the drive motor is fixedly connected to one end of the rotating shaft. A connecting arm is fixedly mounted on each rotating shaft, and a rectangular cover is fixedly fixed to the end of the connecting arm.

[0012] Preferably, when the drive mechanism drives the four swing arms in an X-shaped configuration, the four rectangular covers are used to suction and clean the corresponding negative pressure hole group A. When the two nut seats are close to each other, the swing arms can be driven to swing in pairs on the short side of the rectangular mounting base, and the corresponding two rectangular covers are horizontally aligned to form a double-cavity suction cover A, which is used to suction and clean the corresponding negative pressure hole group B. When the two nut seats are far apart, the swing arms can be driven to swing in pairs on the long side of the rectangular mounting base, and the corresponding two rectangular covers are horizontally aligned to form a double-cavity suction cover B, which is used to suction and clean the corresponding negative pressure hole group C.

[0013] Preferably, the top of the rectangular mounting base is provided with a rinsing mechanism for rinsing the inner wall of the tank. The rinsing mechanism includes a rectangular bend and several spray heads. The rectangular bend is mounted on the top of the rectangular mounting base by a mounting bracket. The shape of the rectangular bend is consistent with the shape of the inner cross section of the tank. Several spray heads are installed at intervals on the rectangular bend. Each spray head is arranged with its opening facing outward and tilted upward. A water inlet pipe is also connected to the rectangular bend. The end of the water inlet pipe is connected to a water supply device.

[0014] Preferably, the base is also provided with a positive pressure blowing mechanism, which includes a blower, an air duct and a secondary duct. A support is fixed on the side of the base, the blower is installed on the support, one end of the air duct is connected to the air outlet of the blower, and the other end is connected to a diversion pipe. The diversion pipe has three outlets, and the three secondary ducts are connected to the outlets on the diversion pipe one by one. Each secondary duct has a connector at its end.

[0015] Preferably, a heating tank is installed on the air duct, and several electric heating grids are installed at intervals inside the heating tank.

[0016] Preferably, the dual-axis moving assembly includes a power guide rail and a cylinder A. The power guide rail is mounted on a base, and a mounting platform is fixed to the top of the moving seat on the power guide rail. The cylinder A is vertically fixed on the mounting platform, and a rectangular mounting seat is mounted on the telescopic end of the cylinder A.

[0017] Preferably, each rectangular cover is fixed with a rubber ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0019] By using a rectangular cover connected to an industrial vacuum cleaner via a suction pipe to form a negative pressure suction mechanism, residual molding sand in the negative pressure holes at negative pressure hole groups A, B, and C can be directly removed, preventing molding sand from drilling deep into the hole or air passage due to positive air pressure, thus solving the problem of difficult cleaning caused by air blowing in existing technologies.

[0020] The four corners of the rectangular mounting base are hinged with swing arms. The four swing arms are driven by a drive mechanism to swing in an X-shaped structure or in pairs, allowing the rectangular cover to be precisely aligned with negative pressure hole groups A, B, and C. This enables three negative pressure suction working scenarios to clean the negative pressure holes in different locations inside the box. The position of the rectangular cover is adjusted by the extension and retraction of cylinder B and the rotation of the drive motor to ensure a tight seal between the rectangular cover and the end face of the negative pressure hole group, thereby improving suction efficiency.

[0021] When the two nut seats approach or move away from each other, the rack and pinion drive the swing arm to swing close to each other on the short or long side through the meshing transmission, so that the corresponding two rectangular covers fit together to form a double-cavity suction cover A or a double-cavity suction cover B, so as to cover the width of the negative pressure hole group B and the negative pressure hole group C, and prevent the molding sand from moving deeper into the uncovered holes due to pressure balance, effectively improving the cleaning effect of the negative pressure hole group B and the negative pressure hole group C.

[0022] The rinsing mechanism is connected to the water supply equipment through the water inlet pipe. Water is sprayed at an angle onto the inner wall of the chamber through the spray head. In conjunction with the dual-axis moving assembly, the rectangular mounting base is moved to remove the molding sand adhering to the inner wall. At the same time, the positive pressure blowing mechanism is connected to the suction port A, suction port B, and suction port C through the connector to deliver air, forming a reverse blowing airflow to prevent or reduce the entry of rinsing water into the air passage and improve the cleaning effect. The electric heating grid in the heating tank of the positive pressure blowing mechanism heats the air. After rinsing, the hot airflow is delivered to the air passage through the auxiliary duct to dry the moisture in the air passage and prevent the molding sand from affecting the vacuum due to moisture accumulation. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 The schematic diagram of the structure shown omits the base and the positive pressure blowing mechanism; Figure 3 for Figure 2 The schematic diagram of the structure shown is omitted, omitting the dual-axis movement group. Figure 4 for Figure 3 Another perspective view of the structure; Figure 5 for Figure 3 The diagram shows a partial structure. Figure 6 for Figure 5 The diagram shows a cross-sectional view of the structure. Figure 7 This is a detailed structural installation diagram of the rectangular cover in this invention; Figure 8 This is a schematic diagram of the rinsing mechanism in the present invention; Figure 9This is a schematic diagram of the positive pressure blowing mechanism in this invention; Figure 10 for Figure 9 Cross-sectional view of the intermediate heating tank; Figure 11 This is a schematic diagram of cleaning point A of the negative pressure hole group; Figure 12 This is a schematic diagram of cleaning point B of the negative pressure hole group; Figure 13 This is a schematic diagram of cleaning point C of the negative pressure hole group; Figure 14 This is a schematic diagram of a sandbox structure in the prior art.

[0024] In the diagram: 01. Box body; 001. Filler; 011. Negative pressure hole group A; 012. Negative pressure hole group B; 013. Negative pressure hole group C; 014. Suction port A; 015. Suction port B; 016. Suction port C; 02. Dual-cavity suction hood A; 03. Dual-cavity suction hood B; 1. Base; 11. Positioning and flipping device; 2. Dual-axis moving group; 21. Power guide rail; 211. Moving seat; 22. Mounting platform; 23. Cylinder A; 3. Rectangular mounting seat; 31. Inner cavity; 32. Mounting groove; 4. Swing arm; 41. Shaft; 42. Main arm; 43. Air... Cylinder B; 44. U-shaped seat; 45. Rotating shaft; 46. Drive motor; 47. Connecting arm; 5. Rectangular cover; 51. Suction pipe; 6. Drive mechanism; 61. Drive motor; 62. Bidirectional threaded rod; 63. Nut seat; 64. Rack; 65. Gear; 7. Flushing mechanism; 71. Mounting bracket; 72. Rectangular bend; 73. Spray head; 74. Water inlet pipe; 8. Positive pressure blowing mechanism; 81. Support; 82. Blower; 83. Air guide pipe; 84. Diverter pipe; 85. Secondary duct; 851. Connector; 86. Heating tank; 861. Electric heating grid. Detailed Implementation

[0025] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0028] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0029] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0030] Example 1

[0031] Please see Figures 1-14 This invention provides a sand box turning and cleaning device for lost foam casting, including a base 1, a positioning and turning device 11 disposed above the base 1, a dual-axis moving assembly 2, and a rectangular mounting base 3 disposed above the dual-axis moving assembly 2. The positioning and turning device 11 adopts existing technology, therefore... Figure 1In a simplified manner, the positioning and flipping device 11 clamps and flips the box 01, so that the positioning and flipping device 11 is placed upside down in the cleaning position and positioned. The specific structure and principle of the positioning and flipping device 11 will not be described in detail. The dual-axis moving assembly 2 is used to drive the rectangular mounting base 3 to move left and right and up and down. The rectangular mounting base 3 is equipped with a negative pressure suction mechanism. After the box 01 is inverted in the cleaning position, the dual-axis moving assembly 2 can drive the rectangular mounting base 3 to move and feed to the bottom of the box 01. Then, the dual-axis moving assembly 2 continues to work, driving the rectangular mounting base 3 to move up into the box 01. Through the negative pressure suction mechanism set on the rectangular mounting base 3, negative pressure suction can be performed on the negative pressure hole group A011, negative pressure hole group B012 and negative pressure hole group C013 in the box 01 to remove the residual molding sand in the negative pressure holes at each position, so as to achieve cleaning of each negative pressure hole group.

[0032] like Figures 3-6 As shown, the negative pressure suction mechanism includes a rectangular cover 5. A swing arm 4 is hinged at each of the four corners of the rectangular mounting base 3. Specifically, each of the four corners of the rectangular mounting base 3 has a mounting groove 32, and a shaft 41 is rotatably mounted in each mounting groove 32. Each swing arm 4 is mounted on the corresponding shaft 41. By mounting the swing arm 4 on the shaft 41, the swing arm 4 has the ability to swing and adjust. Each swing arm 4 is symmetrically arranged with the two adjacent swing arms 4. The rectangular mounting base 3 has a drive mechanism 6 for driving the four swing arms 4 to swing simultaneously with the same amount of force. The swing direction of each swing arm 4 is opposite to that of the two adjacent swing arms 4. A rectangular cover 5 is mounted on the end of each swing arm 4 away from the rectangular mounting base 3.

[0033] The drive mechanism 6 can drive four swing arms 4 to swing simultaneously with the same amount, and any two adjacent swing arms 4 swing in opposite directions. When the drive mechanism 6 drives the four swing arms 4 to swing and adjust to an X structure, the rectangular cover 5 corresponds one-to-one with the position of each negative pressure hole group A011. The sides of each rectangular cover 5 are connected to suction pipes 51, and the ends of each suction pipe 51 are connected to an industrial vacuum cleaner (using existing technology, not shown in the figure). By attaching each rectangular cover 5 to the end face of each negative pressure hole group A011, the industrial vacuum cleaner generates negative pressure. Under the action of the suction pipes 51, the residual molding sand in the negative pressure holes of the negative pressure hole group A011 can be sucked into the dust collection tank of the vacuum cleaner for collection, so that the molding sand can be recycled and reused. That is, the four rectangular covers 5 are used to achieve suction cleaning of the four negative pressure hole groups A011.

[0034] like Figures 5-7As shown, the swing arm 4 includes a main arm 42 and a cylinder B43. Each main arm 42 is installed on the outer periphery of the corresponding shaft 41. Each cylinder B43 is fixed on the end of the corresponding main arm 42. Each rectangular cover 5 is installed on the extension end of the corresponding cylinder B43. The length of each swing arm 4 can be adjusted by the cylinder B43. The cylinder B43 extends to push the rectangular cover 5 to press against the end face of the negative pressure hole group A011 for suction cleaning. The cylinder B43 retracts to facilitate the retraction and reset of the rectangular cover 5.

[0035] In addition, each cylinder B43 has a U-shaped seat 44 fixed on its telescopic end. A vertically extending rotating shaft 45 is rotatably mounted on each U-shaped seat 44. A drive motor 46 is fixed on the side of each U-shaped seat 44. The output shaft of the drive motor 46 is fixedly connected to one end of the rotating shaft 45. A connecting arm 47 is fixedly mounted on each rotating shaft 45. Rectangular covers 5 are fixedly fixed to the ends of the connecting arms 47. The drive motor 46 drives the rotating shaft 45 to rotate. Under the connection of the connecting arms 47, the rotating shaft 45 can drive the rectangular covers 5 to rotate, thereby adjusting the orientation of the rectangular covers 5 so that the rectangular covers 5 can be matched with the angle of the negative pressure hole group A011.

[0036] like Figure 6 As shown, the rectangular mounting base 3 has an inner cavity 31, and four mounting slots 32 are all connected to the inner cavity 31. The mounting slots 32 provide installation space for some components of the drive mechanism 6. Specifically, the drive mechanism 6 includes a drive motor 61, a bidirectional threaded rod 62, and nut seats 63. The bidirectional threaded rod 62 is rotatably installed in the inner cavity 31. Two nut seats 63 are symmetrically and slidably installed in the inner cavity 31. The two nut seats 63 are threadedly matched and fitted on both sides of the bidirectional threaded rod 62. The drive motor 61 is fixed on one side of the rectangular mounting base 3, and its output shaft is fixedly connected to one end of the bidirectional threaded rod 62. When the drive motor 61 works, its output shaft can drive the bidirectional threaded rod 62 to rotate in the forward or reverse direction. The rotating bidirectional threaded rod 62 can thread-drive the two nut seats 63 to slide closer to or further away from each other against the inner wall of the inner cavity 31. In addition, racks 64 are fixed on both sides of the nut seat 63, and gears 65 are fixedly mounted on each shaft 41. The racks 64 and gears 65 mesh one-to-one. Each main arm 42 is fixed on the corresponding gear 65. When the two nut seats 63 move, they can drive the racks 64 on them to move synchronously. The moving racks 64 can mesh with and drive the corresponding gears 65 to rotate. The gears 65 drive the shafts 41 to rotate, thereby driving the swing arm 4 and the rectangular cover 5 to swing, providing a stable drive for the swing adjustment of the swing arm 4 and the rectangular cover 5.

[0037] This embodiment provides a working scenario for cleaning four negative pressure hole groups A011 using a negative pressure suction mechanism. The specific cleaning mechanism is as follows: The drive motor 61 drives the bidirectional threaded rod 62 to rotate accordingly, and the thread drives the two nut seats 63 to move to the corresponding positions. Under the meshing action of the rack 64 and the gear 65, each swing arm 4 is driven to swing to the required position, so that the four swing arms 4 form an X-shaped structure. The drive motor 46 operates, driving the rotating shaft 45, connecting arm 47, and rectangular cover 5 to rotate as a whole until the opening of the rectangular cover 5 faces each negative pressure hole group A011. Then, the cylinder B43 extends, pushing the rectangular cover 5 forward, causing each rectangular cover 5 to adhere to the end face of each negative pressure hole group A011. Figure 11 As shown, at this time, the four rectangular covers 5 are attached to the negative pressure hole group A011 in a one-to-one correspondence, and cover all the negative pressure holes in the negative pressure hole group A011, completing the preparation work before cleaning. Next, by using an industrial vacuum cleaner, the residual molding sand in the negative pressure holes of the negative pressure hole group A011 can be extracted to clean the negative pressure hole group A011.

[0038] In addition, such as Figure 2 As shown, the dual-axis moving assembly 2 includes a power guide rail 21 and a cylinder A23. The power guide rail 21 is mounted on the base 1. The top of the moving seat 211 on the power guide rail 21 is fixed with a mounting platform 22. The cylinder A23 is vertically fixed on the mounting platform 22. The rectangular mounting seat 3 is mounted on the telescopic end of the cylinder A23. The power guide rail 21 works to drive the moving seat 211 on it to move left and right, so as to realize the feeding and retraction of the rectangular mounting seat 3 and the negative pressure suction mechanism. The cylinder A23 telescopic works to drive the rectangular mounting seat 3 and the negative pressure suction mechanism to feed and retract vertically.

[0039] Example 2

[0040] This embodiment is based on embodiment 1 and derives a second working scenario, namely, using a negative pressure suction mechanism to clean the negative pressure hole group B012 on both sides. The specific working mechanism is as follows: The retraction of cylinder B43 drives the rectangular cover 5 to retract. The drive motor 61 drives the bidirectional threaded rod 62 to rotate. The bidirectional threaded rod 62 drives the two nut seats 63 to move closer to each other. Under the meshing transmission of rack 64 and gear 65, the swing arm 4 can be driven to swing in pairs on the short side of the rectangular mounting base 3, thereby driving the corresponding rectangular cover 5 to swing until the opening faces the negative pressure hole group B012. By extending the cylinder B43, the rectangular cover 5 is pushed to attach to the end face of the negative pressure hole group B012. The industrial vacuum cleaner works to generate a negative pressure suction effect, which can extract and collect the molding sand in the negative pressure hole group B012, thus cleaning the negative pressure hole group B012.

[0041] However, since the width of negative pressure hole group B012 is greater than that of negative pressure hole group A011, when cleaning negative pressure hole group B012 using rectangular cover 5, the width of a single rectangular cover 5 cannot cover the entire width of negative pressure hole group B012. This results in some negative pressure holes in negative pressure hole group B012 not being covered by rectangular cover 5. Consequently, during negative pressure suction, due to pressure balance, external air enters the air passage through the negative pressure holes not covered by rectangular cover 5, and then flows into rectangular cover 5 through the negative pressure holes covered by rectangular cover 5. This airflow intensifies the movement of molding sand deeper into the negative pressure holes not covered by rectangular cover 5, and may even cause molding sand to enter the air passage, making it even more difficult to suck out. To solve this problem, this application makes the following improvements: During the process of the drive arm 4 swinging to clean the negative pressure hole group B012 with the rectangular cover 5, the two swing arms 4 on the same side swing closer to each other, and work with the drive motor 46 to drive the angle of the two rectangular covers 5 to be finely adjusted until the two rectangular covers 5 are in close contact with each other. Figure 12 As shown, the two rectangular covers 5 ultimately form a double-chamber suction cover A02. The width of the double-chamber suction cover A02 is sufficient to cover the width of the negative pressure hole group B012. When the cylinder B43 extends and pushes the double-chamber suction cover A02 to adhere to the end face of the negative pressure hole group B012, it can cover all the negative pressure holes in the negative pressure hole group B012, so as to clean the negative pressure hole group B012 more thoroughly.

[0042] Example 3

[0043] This embodiment is based on embodiment 1 and derives a third working scenario, namely, using a negative pressure suction mechanism to clean the negative pressure hole group C013 on both sides. The specific working mechanism is as follows: The retraction of cylinder B43 drives the rectangular cover 5 to retract. The drive motor 61 drives the bidirectional threaded rod 62 to rotate. The bidirectional threaded rod 62 drives the two nut seats 63 to move closer to each other. Under the meshing transmission of rack 64 and gear 65, the swing arm 4 can be driven to swing in pairs on the long side of the rectangular mounting base 3, which in turn drives the corresponding rectangular cover 5 to swing until the opening faces the negative pressure hole group C013. By extending the cylinder B43, the rectangular cover 5 is pushed to attach to the end face of the negative pressure hole group C013. The industrial vacuum cleaner works to generate a negative pressure suction effect, which can extract and collect the molding sand in the negative pressure hole group C013, thus cleaning the negative pressure hole group C013.

[0044] However, since the width of negative pressure hole group C013 is greater than that of negative pressure hole group A011, when cleaning negative pressure hole group C013 using rectangular cover 5, the width of a single rectangular cover 5 cannot cover the entire width of negative pressure hole group C013. This results in some negative pressure holes in negative pressure hole group C013 not being covered by rectangular cover 5. Consequently, during negative pressure suction, due to pressure balance, external air enters the air passage through the negative pressure holes not covered by rectangular cover 5, and then flows into rectangular cover 5 through the negative pressure holes covered by rectangular cover 5. This airflow intensifies the movement of molding sand deeper into the negative pressure holes not covered by rectangular cover 5, thus increasing the cleaning difficulty. To solve this problem, this application makes the following improvements: During the process of the drive arm 4 swinging to clean the negative pressure hole group C013 with the rectangular cover 5, the two swing arms 4 on the same side swing closer to each other, and work with the drive motor 46 to drive the angle of the two rectangular covers 5 to be finely adjusted until the two rectangular covers 5 are in close contact with each other. Figure 13 As shown, the two rectangular covers 5 ultimately form a double-chamber suction cover B03. The width of the double-chamber suction cover B03 is sufficient to cover the width of the negative pressure hole group C013. When the cylinder B43 extends and pushes the double-chamber suction cover B03 to adhere to the end face of the negative pressure hole group C013, it can cover all the negative pressure holes in the negative pressure hole group C013, so as to clean the negative pressure hole group C013 more thoroughly.

[0045] It is worth noting that when the two rectangular covers 5 are attached together to form the double-cavity suction cover A02 and the double-cavity suction cover B03, the overall thickness of the two side walls of the two rectangular covers 5 that are attached to each other is less than the gap between the negative pressure holes in the negative pressure hole group B012 and the negative pressure hole group C013. This avoids the two side walls of the two rectangular covers 5 that are attached to each other from blocking some of the negative pressure holes in the negative pressure hole group B012 and the negative pressure hole group C013.

[0046] In addition, each rectangular cover 5 is fixed with a rubber ring. When the rectangular cover 5 is attached to the end face of the negative pressure hole group A011, negative pressure hole group B012 and negative pressure hole group C013, the rubber ring can improve the sealing effect during negative pressure suction, and further improve the cleaning and sand removal effect.

[0047] Example 4

[0048] Please see Figure 1 , Figure 2 , Figure 3 and Figure 8 The difference between this embodiment and Embodiment 1 is that: The top of the rectangular mounting base 3 is equipped with a rinsing mechanism 7 for rinsing the inner wall of the box 01. The rinsing mechanism 7 includes a rectangular bend 72 and several spray heads 73. The rectangular bend 72 is mounted on the top of the rectangular mounting base 3 through a mounting bracket 71. The shape of the rectangular bend 72 is consistent with the shape of the inner cross section of the box 01. Several spray heads 73 are installed at intervals on the rectangular bend 72. Each spray head 73 is arranged with its opening facing outward and tilted upward. A water inlet pipe 74 is also connected to the rectangular bend 72. The end of the water inlet pipe 74 is connected to a water supply device (using existing technology, not shown in the figure).

[0049] Clean water is delivered to the inlet pipe 74 via a water supply device. The water is then delivered from the inlet pipe 74 into the rectangular bend pipe 72, and finally sprayed out through each spray head 73 to clean the inner wall of the box 01.

[0050] The rectangular bend 72 is adapted to the internal shape of the housing 01, so that the shape of the spray head 73 is adapted to the internal shape of the housing 01. In addition, each spray head 73 is arranged with its opening facing outward at an angle, and the spray range of two adjacent spray heads 73 complements each other. Combined with the lifting effect provided by the dual-axis moving group 2, the inner wall of the housing 01 is sprayed and cleaned more thoroughly.

[0051] Example 5

[0052] Please see Figure 1 and Figure 8 The difference between this embodiment and embodiment 4 is that: The base 1 is also provided with a positive pressure blowing mechanism 8, which includes a blower 82, an air duct 83 and a secondary duct 85. A support 81 is fixed on the side of the base 1. The blower 82 is installed on the support 81. One end of the air duct 83 is connected to the air outlet of the blower 82, and the other end is connected to a diversion pipe 84. The diversion pipe 84 has three outlets. The three secondary ducts 85 are connected to the outlets on the diversion pipe 84 in a corresponding manner. Each secondary duct 85 has a connector 851 at its end.

[0053] When cleaning the negative pressure hole group A011, such as Figure 11 As shown, the connector 851 on one of the auxiliary conduits 85 is fitted onto the suction port A014, and the other two auxiliary conduits 85 are blocked. The blower 82 operates to compress external air into the air duct 83, and the air flows through the diversion pipe 84, the corresponding auxiliary conduit 85, and the suction port A014 into the air passage connected to the negative pressure hole group A011. Finally, the air flows out through the negative pressure hole at the negative pressure hole group A011. In addition to negative pressure suction, low-pressure airflow can be auxiliaryly introduced into the corresponding air passage through 8. When the airflow flows out through the negative pressure hole, it helps to loosen the molding sand in the negative pressure hole, making it easier to be sucked out by negative pressure, and further improving the cleaning quality of the negative pressure hole group A011.

[0054] When cleaning the negative pressure hole group B012, such as Figure 12 As shown, the connector 851 on one of the auxiliary conduits 85 is fitted onto the suction port B015, and the other two auxiliary conduits 85 are blocked. The blower 82 operates to compress external air into the air duct 83, and the air flows through the diversion pipe 84, the corresponding auxiliary conduit 85, and the suction port B015 into the air passage connected to the negative pressure hole group B012. Finally, the air flows out through the negative pressure hole at the negative pressure hole group B012. In addition to negative pressure suction, low-pressure airflow can be auxiliaryly introduced into the corresponding air passage through 8. When the airflow flows out through the negative pressure hole, it helps to loosen the molding sand in the negative pressure hole, making it easier to be sucked out by negative pressure, and further improving the cleaning quality of the negative pressure hole group B012.

[0055] When cleaning the negative pressure hole group C013, such as Figure 13 As shown, the connector 851 on one of the auxiliary conduits 85 is fitted onto the suction port C016, and the other two auxiliary conduits 85 are blocked. The blower 82 operates to compress external air into the air duct 83, and the air flows through the diversion pipe 84, the corresponding auxiliary conduit 85 and the suction port C016 into the air passage connected to the negative pressure hole group C013. Finally, the air flows out through the negative pressure hole at the negative pressure hole group C013. In addition to negative pressure suction, low-pressure airflow can be auxiliaryly introduced into the corresponding air passage through 8. When the airflow flows out through the negative pressure hole, it helps to loosen the molding sand in the negative pressure hole, making it easier to be sucked out by negative pressure, and further improving the cleaning quality of the negative pressure hole group C013.

[0056] Secondly, when the rinsing mechanism 7 sprays and cleans the inner wall of the housing 01, the three auxiliary conduits 85 are connected to the suction port A014, suction port B015 and suction port C016 respectively through the connector 851, and air is supplied to the air passages connected to the negative pressure hole group A011, negative pressure hole group B012 and negative pressure hole group C013 respectively, forming a backflush airflow from the negative pressure holes at each position, which can reduce the situation of water entering each air passage from the negative pressure hole.

[0057] In addition, such as Figure 10 As shown, a heating tank 86 is installed on the air duct 83. Several electric heating grids 861 are installed in the heating tank 86 at intervals. When the inner wall of the box 01 is sprayed and cleaned, even if a small amount of water enters the air passage through the negative pressure hole, the electric heating grids 861 generate heat to heat the air entering each air passage. The hot airflow can dry the moisture in each air passage. In addition, the hot airflow is finally sprayed out into the box 01 through each negative pressure hole, which can ensure that the hot airflow is sprayed out at multiple points and fills the box 01, effectively improving the drying effect inside the box 01.

[0058] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, the present invention will not explain the control method and circuit connection in detail.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A sand box turning and cleaning device for lost foam casting, comprising a base (1), a positioning and turning device (11) disposed above the base (1), a dual-axis moving assembly (2), and a rectangular mounting base (3) disposed above the dual-axis moving assembly (2), characterized in that: The dual-axis moving assembly (2) is used to drive the rectangular mounting base (3) to move left and right and up and down; The rectangular mounting base (3) is provided with a negative pressure suction mechanism, which includes a rectangular cover (5). Each of the four corners of the rectangular mounting base (3) is hinged with a swing arm (4), and each swing arm (4) is symmetrically arranged with the two adjacent swing arms (4). Each of the swing arms (4) is equipped with a rectangular cover (5) at the end away from the rectangular mounting base (3), and each of the rectangular covers (5) is connected to a suction pipe (51) on its side. The end of each suction pipe (51) is connected to an industrial vacuum cleaner. The rectangular mounting base (3) is provided with a drive mechanism (6) for driving the four swing arms (4) to swing simultaneously with the same amount, and the swing direction of any one swing arm (4) is opposite to that of the two adjacent swing arms (4); The rectangular mounting base (3) is provided with mounting grooves (32) at each of its four corners, and a shaft (41) is rotatably mounted in each of the mounting grooves (32). The swing arm (4) includes a main arm (42) and a cylinder B (43); Each of the main arms (42) is respectively installed on the outer periphery of the corresponding shaft (41), and each of the cylinders B (43) is fixed on the end of the corresponding main arm (42); Each of the rectangular covers (5) is respectively installed on the telescopic end of the corresponding cylinder B (43); The rectangular mounting base (3) has an inner cavity (31), and the four mounting slots (32) are all connected to the inner cavity (31); The drive mechanism (6) includes a drive motor (61), a bidirectional threaded rod (62), and a nut seat (63). The bidirectional threaded rod (62) is rotatably installed in the inner cavity (31), and two nut seats (63) are symmetrically and slidingly installed in the inner cavity (31). The two nut seats (63) are respectively threaded and matched on both sides of the bidirectional threaded rod (62). The drive motor (61) is fixed to one side of the rectangular mounting base (3), and the output shaft is fixedly connected to one end of the bidirectional threaded rod (62); Both sides of the nut seat (63) are fixed with racks (64), and each shaft (41) is fixedly fitted with a gear (65). The racks (64) and the gears (65) mesh in a one-to-one correspondence. Each of the main arms (42) is fixed to the corresponding gear (65); When the drive mechanism (6) drives the four swing arms (4) to be arranged in an X-shaped structure, the four rectangular covers (5) are used to suction and clean the corresponding negative pressure hole group A (011). When the two nut seats (63) approach each other, the swing arm (4) can be driven to swing in pairs on the short side of the rectangular mounting seat (3) in a close-to-each-other manner, and drive the corresponding two rectangular covers (5) to be horizontally aligned and attached to form a double-cavity suction cover A (02), which is used to suction and clean the negative pressure hole group B (012) on the corresponding side. When the two nut seats (63) are far apart from each other, the swing arm (4) can be driven to swing in pairs on the long side of the rectangular mounting base (3) in a close manner, and drive the corresponding two rectangular covers (5) to be horizontally aligned and attached to form a double-cavity suction cover B (03), which is used to suction and clean the negative pressure hole group C (013) on the corresponding side.

2. The sand box turning and cleaning device for lost foam castings according to claim 1, characterized in that: Each cylinder B (43) has a U-shaped seat (44) fixed on its telescopic end, and a vertically extending shaft (45) is rotatably mounted on the U-shaped seat (44). Each of the U-shaped seats (44) has a drive motor (46) fixed on its side, and the output shaft of the drive motor (46) is fixedly connected to one end of the rotating shaft (45). Each of the rotating shafts (45) is fixedly fitted with a connecting arm (47), and the rectangular cover (5) is fixed to the end of the connecting arm (47) in a corresponding manner.

3. The sand box turning and cleaning device for lost foam castings according to claim 1, characterized in that: The rectangular mounting base (3) is provided with a rinsing mechanism (7) at the top for rinsing the inner wall of the box (01); The rinsing mechanism (7) includes a rectangular bend (72) and several spray heads (73); The rectangular bend (72) is mounted on the top of the rectangular mounting base (3) via the mounting bracket (71), and the shape of the rectangular bend (72) is consistent with the shape of the internal cross section of the box (01); A plurality of spray heads (73) are installed at intervals on the rectangular bend (72), and each spray head (73) is arranged with its opening facing outward and tilted upward. The rectangular bend (72) is also connected to a water inlet pipe (74), and the end of the water inlet pipe (74) is connected to the water supply equipment.

4. The sand box turning and cleaning device for lost foam castings according to claim 1, characterized in that: The base (1) is also provided with a positive pressure blowing mechanism (8), which includes a blower (82), an air duct (83) and a secondary duct (85). A support (81) is fixed to the side of the base (1), and the blower (82) is installed on the support (81); One end of the air duct (83) is connected to the air outlet of the blower (82), and the other end is connected to the diversion pipe (84). The shunt tube (84) has three outlets, and the three auxiliary conduits (85) are connected to the outlets on the shunt tube (84) in a corresponding manner. Each of the aforementioned secondary catheters (85) has a connector (851) at its end.

5. The sand box turning and cleaning device for lost foam castings according to claim 4, characterized in that: A heating tank (86) is installed on the air duct (83), and several electric heating grids (861) are installed in the heating tank (86) at intervals.

6. The sand box turning and cleaning device for lost foam castings according to claim 1, characterized in that: The dual-axis moving assembly (2) includes a power guide rail (21) and a cylinder A (23). The power guide rail (21) is mounted on the base (1), and the top of the movable seat (211) on the power guide rail (21) is fixed with a mounting platform (22). The cylinder A (23) is vertically fixed on the mounting platform (22). The rectangular mounting base (3) is installed on the telescopic end of the cylinder A (23).

7. The sand box turning and cleaning device for lost foam castings according to claim 1, characterized in that: Each of the rectangular covers (5) is fixed with a rubber ring.

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