Sand box transport device

Abstract

The present invention relates to the technical field of sand casting, and in particular to a sand box transport device. The sand box transport device of the present invention comprises a conveying mechanism, a first roller conveyor, a second roller conveyor, a flipping and closing mechanism, and a third roller conveyor; the first roller conveyor is located in a molding section, the flipping and closing mechanism is located in the flipping and closing section, the second roller conveyor is used to connect the molding section with the flipping and closing section, and the third roller conveyor is located behind the flipping and closing section; the sand box is positioned on the conveying mechanism, the conveying mechanism is positioned on each roller conveyor, and the conveying mechanism is positioned between the molding machine; the conveying mechanism and the flipping and closing mechanism are limitedly positioned and coordinated, and the closing of the upper sand box and the lower sand box is achieved through a lifting mechanism in the flipping and closing mechanism, and the third roller conveyor comprises a mold closing conveying section and a pallet conveying section, the mold closing conveying section is used to convey the mold after the box is closed, and the pallet conveying section is used to convey the empty conveying mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of sand casting, and in particular to a sand box transportation device. Background Art

[0002] Sand casting refers to a casting method that produces castings in molding sand. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, the mold is simple to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings, it has long been the basic process in casting production and is widely used in the production process.

[0003] In the process of sand casting, a sand box is indispensable. By filling the sand box with molding sand and matching it with the mold of the workpiece to be made, the workpiece to be made can be molded; then the sand box is transferred to the casting section, and molten metal is poured into the sand box through the pouring port reserved on the sand box. The molten metal then fills the space in the sand box, and the workpiece to be made can be obtained after cooling. After surface treatment, the finished workpiece can be obtained.

[0004] Currently, manual molding is widely used in the sand casting process, which is time-consuming and labor-intensive, with low production efficiency and potential threats to the health of operators. The existing fully automatic sand box molding process uses advanced molding equipment and production lines, which can greatly improve production efficiency, but at the same time also brings high equipment costs, which brings a considerable burden to the enterprise. Therefore, considering the comprehensive cost, a low-cost sand box transportation device that can accurately and efficiently carry out production transportation is a problem that existing enterprises need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a sand box transportation device to solve the problem of realizing production transportation more efficiently, stably and accurately at lower equipment and operating costs.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a sand box transport device comprises a conveying mechanism, a first roller conveyor, a second roller conveyor, a flipping and closing mechanism and a third roller conveyor; the sand box is positioned and placed on the conveying mechanism;

[0007] The first roller conveyor is located in the molding section, the flipping and box closing mechanism is located in the flipping and box closing section, the second roller conveyor is used to connect the molding section and the flipping and box closing section, and the third roller conveyor is located behind the flipping and box closing section; the first roller conveyor, the second roller conveyor, the flipping and box closing mechanism and the third roller conveyor are respectively matched with the conveying mechanism; the first roller conveyor, the second roller conveyor and the third roller conveyor realize the center positioning of the conveying mechanism along the conveying direction;

[0008] The first roller conveyor is provided with a first positioning mechanism, which cooperates with the conveying mechanism to realize the positioning of the conveying mechanism relative to the molding machine in the molding section; the first roller conveyor is provided with two liftable support plates, which cooperate with the conveying mechanism to lift and lower the conveying mechanism; the two support plates respectively support the upper sand box and the lower sand box of the same workpiece;

[0009] The second roller conveyor cooperates with the flipping and closing mechanism, which is used to close the upper sand box and the lower sand box to form an integral mold and separate the empty conveying mechanism;

[0010] The third roller conveyor cooperates with the flipping and closing mechanism. The third roller conveyor includes a mold closing conveying section and a pallet conveying section. The mold closing conveying section is used to convey the mold after closing the box, and the mold closing conveying section goes to the casting section. The pallet conveying section is used to convey the empty conveying mechanism, and the pallet conveying section goes to the pallet transfer section.

[0011] Furthermore, the first roller conveyor, the second roller conveyor and the third roller conveyor all include a frame and a sprocket roller; the conveying mechanism includes a pallet, a placement groove is provided on the pallet, and the sand box is placed in the placement groove; guide wheels are provided on both sides of the pallet close to the frame, and the guide wheels cooperate with the frame, and the conveying mechanism realizes its center positioning along the conveying direction through the guide wheels.

[0012] Furthermore, the two support plates are respectively provided with a first travel switch, which cooperates with the conveying mechanism and the first roller conveyor; the first positioning mechanism is fixedly installed on the frame, the first positioning mechanism includes a bracket, the bracket is fixedly connected to the frame, a first positioning cylinder is installed on the bracket, the lower end of the first positioning cylinder is connected to the spherical end head, a positioning groove is provided on the conveying mechanism, the positioning groove cooperates with the spherical end head, the positioning groove is "Y"-shaped, including an upper flaring section and a lower reduced diameter section, and the diameter of the reduced diameter section is consistent with the diameter of the spherical end head.

[0013] Furthermore, the two support plates are connected to the lead screw elevator at their lower parts, and a spring is arranged between the mounting plate of the lead screw elevator and the support plates.

[0014] Furthermore, a second travel switch is provided at the front end of the second roller conveyor.

[0015] Furthermore, a cylindrical turning frame is provided in the turning and closing mechanism, and the turning frame is connected with the turning drive mechanism in transmission, and the turning drive mechanism drives the turning frame to turn back and forth 180°. Two supporting slot plates are provided in the turning frame, and the two supporting slot plates are symmetrically arranged relative to the turning frame; the two supporting slot plates are respectively matched with the upper sand box and the lower sand box, the supporting slot plates are matched with the conveying mechanism for limiting positioning, and the supporting slot plates are matched with the upper sand box and the lower sand box for clamping and fixing; a lifting mechanism is provided between the two supporting slot plates, and the lifting mechanism is used for the two supporting slot plates to approach and separate each other.

[0016] Furthermore, the support slot plate is in a "concave" shape, and limiting slots are arranged on both sides of the support slot plate, the limiting slots cooperate with the pallet, and a second positioning cylinder is arranged on the support slot plate, the second positioning cylinder cooperates with the positioning slot; a clamping cylinder is arranged on the support slot plate, and the clamping cylinder cooperates with the sand box clamping.

[0017] Furthermore, the lifting mechanism includes a first rack and a second rack, the first rack and the second rack are respectively connected to a supporting slot plate, the tooth shapes of the first rack and the second rack are arranged oppositely, and a lifting drive gear is arranged between the first rack and the second rack, the lifting drive gear is connected to the box closing drive motor, and the box closing drive motor is fixedly installed on the flip frame.

[0018] Furthermore, the flipping and closing mechanism cooperates with the third roller conveyor, and a third stroke switch is arranged on the mold closing and conveying section. The third stroke switch cooperates with the empty conveying mechanism and the third roller conveyor. A pushing cylinder is arranged on one side of the third roller conveyor, and the pushing cylinder cooperates with the empty conveying mechanism. The pushing cylinder pushes the empty conveying mechanism to the pallet transfer section, and the width of the pallet transfer section is greater than the width of the conveying mechanism.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a conveying mechanism and a positioning device in the first roller conveyor, so that the sand box can cooperate with the molding machine more accurately during the molding process, thereby improving the accuracy of molding, contributing to the improvement of production efficiency and production quality, and effectively avoiding the situation of unqualified molding; the present invention lifts and lowers the support plate through the screw elevator, and the two sand boxes are lifted and lowered synchronously during the process, which is more stable to use. At the same time, a spring is provided between the support plate and the screw elevator, which can effectively reduce the impact of the primary sandblasting of the molding on the pallet, which helps to ensure the service life of the pallet and effectively avoid the occurrence of potholes on the surface of the subsequent sand mold; the present invention can achieve the turning and closing mechanism through the flipping and closing mechanism The positioning and limiting of the pallet in the conveying mechanism and the fixation of the sand box can realize stable and accurate box closing operation, which can effectively ensure the quality of the product; at the same time, it can realize the transportation of empty pallets and sand boxes after mold closing, which is conducive to the continuous and stable production and the improvement of production efficiency; the present invention realizes the separation of empty pallets and sand boxes after mold closing by turning over the box closing mechanism, and can realize the transportation of each by the third roller conveyor, which helps to ensure the continuity of production; the transportation device of the present invention operates stably and reliably, can realize accurate molding and turning over and closing, and can ensure the continuous and stable production, which has a positive and beneficial effect on ensuring product quality and improving production efficiency.

[0021] Figure 1 It is a schematic top view of the overall structure of the present invention in the molding section;

[0022] Figure 2 It is a schematic diagram of the cooperation between the transport mechanism and the positioning mechanism in the molding section of the present invention;

[0023] Figure 3 It is a schematic diagram of the positioning mechanism structure in the molding section of the present invention;

[0024] Figure 4 It is a schematic diagram of the cooperation between the lead screw lift and the support plate in the molding section of the present invention;

[0025] Figure 5 It is a schematic top view of the overall structure of the present invention in the box-closing section;

[0026] Figure 6 It is a cross-sectional schematic diagram of the flipping and closing mechanism of the present invention in the closing section (along the sand box transportation direction, unclosed state);

[0027] Figure 7 It is a cross-sectional schematic diagram of the flipping and closing mechanism of the present invention in the closing section (along the sand box transportation direction, the closing state);

[0028] Figure 8 It is a structural schematic diagram of the lifting mechanism in the turning and closing mechanism of the present invention.

[0029] The names corresponding to the marks in the figure are:

[0030] 1. First roller conveyor; 11. Frame; 12. Sprocket roller; 13. First positioning mechanism; 131. Bracket; 132. First positioning cylinder; 133. Ball end; 14. First stroke switch; 2. Conveying mechanism; 21. Tray; 22. Placement slot; 23. Guide wheel; 24. Lifting ear; 25. Positioning slot; 251. Expanding section; 252. Reducing section; 3. Support plate; 4. Screw lift; 41. Screw drive motor; 42. Screw lift mechanism; 43. Roller chain coupling; 44. Screw; 45. Mounting plate; 46. Spring; 5. Second roller conveyor; 51. Second stroke switch; 6. Flipping and closing mechanism ; 61. Flip frame; 611. First baffle; 612. Second baffle; 62. Flip drive mechanism; 621. Driven gear ring; 622. Flip drive motor; 623. Base; 624. Flip drive gear; 63. Box closing drive mechanism; 631. Box closing drive motor; 632. Lifting mechanism; 633. First rack; 634. Second rack; 635. Lifting drive gear; 64. Support slot plate; 641. Limiting slot; 642. Second positioning cylinder; 643. Clamping cylinder; 7. Third roller conveyor; 71. Mold closing conveying section; 711. Third stroke switch; 712. Push cylinder; 72. Pallet conveying section. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Embodiments of the present invention:

[0033] like Figure 1 , 5 As shown, the transport device of the present invention includes a first roller conveyor 1, a second roller conveyor 5, a flipping and box closing mechanism 6 and a third roller conveyor 7, and the third roller conveyor 7 includes a mold closing conveying section 71 and a pallet conveying section 72; wherein, the first roller conveyor 1 is located in the molding section, the second roller conveyor 5 is used to connect the molding section and the flipping and box closing section, and the third roller conveyor 7 is located behind the flipping and box closing section; the first roller conveyor 1, the second roller conveyor 5 and the third roller conveyor 7 all include a frame 11 and a sprocket roller 12, and the sprocket rollers 12 are interconnected by chains, and the chains are driven and connected to the conveying motors of the first to third roller conveyors 7, and the conveying motors of the mold closing conveying section 71 and the pallet conveying section 72 in the third roller conveyor 7 are respectively driven and connected to their respective sprocket rollers 12.

[0034] like Figure 1-4As shown, the first roller conveyor 1 is located at the molding section, connected to the box turning and cleaning section above, and goes to the box turning and closing section below; a conveying mechanism 2 is conveyed by the first roller conveyor 1, wherein the conveying mechanism 2 includes a pallet 21, a placement groove 22 is provided on the pallet 21, the placement groove 22 cooperates with the sand box, guide wheels 23 are provided on the left and right sides of the pallet 21, the guide wheels 23 cooperate with the inner side of the frame 11 of the first roller conveyor 1, and ears 24 are provided on the front and back sides of the pallet 21.

[0035] Two liftable support plates 3 are arranged in the first roller conveyor 1, and the support plates 3 are connected to the lead screw elevator 4 at the bottom. First travel switches 14 are respectively arranged on the front sides (according to the running direction) of the two support plates 3. When the tray 21 contacts the first travel switch 14, the conveying motor of the first roller conveyor 1 stops, so that the two trays 21 are respectively located above the two support plates 3. At this time, the lead screw drive motor 41 of the lead screw elevator 4 drives the support plate 3 to rise and lift the tray 21, so that the sand boxes on the two support plates 3 can be sandblasted and molded by the molding machine in the molding section.

[0036] In the above process, two sand boxes are molded by the molding machine. In actual production, the moldings in the two sand boxes are respectively part of the workpiece to be cast, and the two are combined and complemented to form the entire mold; therefore, two pallets 21, one in front and one behind, are conveyed simultaneously on the first roller conveyor 1, recorded as the first pallet 21 and the second pallet 21. There is a certain interval between the two pallets 21, and they are used for molding the upper sand box and the lower sand box respectively; controlled by the on-site PLC, when the first pallet 21 passes through the first first stroke switch 14, the first roller conveyor 1 does not stop working at this time, when the first pallet 21 touches the second first stroke switch 14, the first roller conveyor 1 stops working, generally, the second pallet 21 should also contact the first first stroke switch 14 at this time, at this time, only the first positioning mechanism 13 needs to be actuated to position the first pallet 21 and the second pallet 21, and the sand boxes in the two positioned pallets 21 are just located below the molding machine, at this time the support plate 3 rises, and accurate molding of the sand boxes can be achieved.

[0037] However, in actual production, it may happen that when the first pallet 21 touches the second first stroke switch 14, the second pallet 21 is still at a considerable distance from the second first stroke switch 14. At this time, the first roller conveyor 1 stops working, and the first positioning mechanism 13 located at the first pallet 21 is actuated, so the first pallet 21 is first fixed on the first roller conveyor 1, and then the first roller conveyor 1 continues to move and continues to drive the second pallet 21 forward. When the second pallet 21 touches the first first stroke switch 14, the first roller conveyor 1 stops working, and the first positioning mechanism 13 located at the second pallet 21 is actuated to position the second pallet 21. After the positioning is completed, the screw lift 4 drives the support plate 3 to move up and then perform shaping; if the first pallet 21 has not yet touched the second first stroke switch 14, the second pallet 21 touches the first first stroke switch 14. The situation at this time is similar to the above and will not be repeated.

[0038] In this embodiment, the first positioning mechanism 13 includes a bracket 131, wherein the bracket 131 is fixedly mounted on the frame 11 of the first roller conveyor 1, a first positioning cylinder 132 is arranged on the bracket 131, a ball end 133 is arranged below the first positioning cylinder 132, and the ball end 133 cooperates with the positioning groove 25, wherein the positioning groove 25 is fixed on the left and right sides of the tray 21, and the positioning groove 25 is "Y"-shaped, including an upper flared section 251 and a lower reduced diameter section 252, and the ball end 133 is connected to the flared section 251. When touched, the first positioning cylinder 132 applies a downward force, and under the action of the downward force, the spherical end 133 will press the tray 21 to move slightly forward and backward, and finally the spherical end 133 is below the reduced diameter section 252, and the diameter of the reduced diameter section 252 is almost the same as that of the spherical end 133, thereby realizing the positioning of the tray 21; it should be noted that after the spherical end 133 is lifted, there is no interference with the tray 21 in space, and at the same time, after the tray 21 is lifted up by the support plate 3, there is no interference between the tray 21 and the bracket 131 of the first positioning mechanism 13 in space.

[0039] In this embodiment, the screw lift 4 includes a screw drive motor 41, which is driven and connected to two screw lift mechanisms 42 respectively, and the two screw lift mechanisms 42 are connected through a roller chain coupling 43. The screw 44 above the screw lift mechanism 42 is connected to the mounting plate 45, and the support plate 3 is installed above the mounting plate 45 through a connecting bolt. A spring 46 is arranged between the support plate 3 and the mounting plate 45, and the spring 46 is sleeved on the connecting bolt. For the screw lift mechanism 42, it is an existing mature technology. The screw drive motor 41 is connected to the worm, and the worm is connected to the worm wheel. The screw is located in the center of the worm wheel and is threadedly connected to the worm wheel, and a thrust bearing and a ball screw pair are installed on the screw.

[0040] like Figure 5-8 As shown, the second roller conveyor 5 is connected to the molding section at the top and the flipping and box closing section at the bottom; a second stroke switch 51 is arranged at the front end of the second roller conveyor 5, and a flipping and box closing mechanism 6 is arranged in the flipping and box closing section, and the flipping and box closing mechanism 6 includes a flip frame 61, and the flip frame 61 cooperates with a flip driving mechanism 62, wherein driven gear rings 621 are arranged on both sides of the flip frame 61, and the driven gear ring 621 is transmission-connected with a flip driving motor 622, and the flip driving motor 622 is installed on a base 623, and the flip driving motor 622 is connected to a flip driving gear 624, and the flip driving gear 624 is meshed with the driven gear ring 621. In this embodiment, the flip driving motor 622 is a servo motor, which can drive the flip frame 61 to flip back and forth by ±180°.

[0041] A first baffle plate 611 and a second baffle plate 612 are provided in the turning frame 61. The first baffle plate 611 and the second baffle plate 612 are symmetrically arranged on both sides of the turning frame 61. Two supporting slot plates 64 are provided between the inner sides of the first baffle plate 611 and the second baffle plate 612. The two supporting slot plates 64 are in a "concave" shape and are symmetrically arranged. Limiting slots 641 are respectively provided on both sides of the groove of each supporting slot plate 64. The limiting slots 641 cooperate with the pallet 21. A second positioning cylinder 642 is provided on the supporting slot plate 64. The structure of the second positioning cylinder 642 is consistent with that of the first positioning mechanism 13. The second positioning cylinder 642 extends into the limiting slot 641 and cooperates with the positioning slots 25 on both sides of the pallet 21. Clamping cylinders 643 are also provided on both sides of the groove of each supporting slot plate 64. The clamping cylinder 643 cooperates with the sand box on the pallet and clamps the sand box on both sides.

[0042] A box closing drive mechanism 63 is also provided between the two supporting slot plates 64, and the box closing drive mechanism 63 includes a box closing drive motor 631, which is fixedly installed on the outside of the flip frame 61, and the box closing drive motor 631 is transmission-connected with the lifting mechanism 632, and a first rack 633 and a second rack 634 are provided in the lifting mechanism 632, and the first rack 633 and the second rack 634 are respectively fixedly connected to the two supporting slot plates 64, and the tooth shapes of the first rack 633 and the second rack 634 are arranged opposite to each other, and a lifting drive gear 635 is provided between the first rack 633 and the second rack 634, and the lifting drive gear 635 is connected to the box closing drive motor 631.

[0043] In this embodiment, when the third box closing operation is required, the molded sand box from the molding section is transported to the flipping and closing mechanism 6 via the second roller conveyor 5. At this time, the sand box on the previous pallet 21 is the upper sand box, and the sand box on the rear pallet 21 is the lower sand box. Under the push of the lower sand box pallet 21, the upper sand box pallet 21 enters the flipping frame 61. During the process, the limit grooves 641 on both sides of the pallet 21 fit together, and the sand box does not interfere with the opening above the support groove plate 64 in space.

[0044] When the lower sand box pallet 21 touches the second travel switch 51 on the second roller conveyor 5, the second roller conveyor 5 stops working. At the same time, the second positioning cylinder 642 located in the turning frame 61 is actuated. The second positioning cylinder 642 is pressed down to realize accurate positioning of the lower sand box pallet 21. This process is consistent with the principle of the first positioning cylinder 132 and will not be described in detail. After the positioning is completed, the clamping cylinder 643 is actuated to clamp and fix the upper sand box.

[0045] After the upper sand box is clamped and fixed, the overturning drive motor 622 drives the overturning frame 61 to overturn 180 degrees, so that the upper sand box tray is overturned to the top of the overturning frame 61. At this time, the second roller conveyor 5 continues to move. Under the push of the next upper sand box tray 21, the lower sand box tray 21 enters the supporting slot plate 64 in the overturning frame 61. Similarly, the second positioning cylinder 642 and the clamping cylinder 643 on the supporting slot plate 64 are actuated to realize the positioning and clamping of the lower sand box tray 21. After the above operations are completed, the closing operation can be carried out. At this time, the closing drive motor 631 drives the lifting mechanism 632 to move. During the process, as the lifting drive gear 635 rotates ( Figure 8The two support slot plates 64 move counterclockwise as shown above), and the two support slot plates 64 move closer to each other. When the upper sand box contacts the lower sand box, the clamping cylinder 643 corresponding to the upper sand box is released, so that the upper sand box is pressed on the lower sand box. At this time, the closing box driving motor 631 reverses (a servo motor can also be used in this embodiment), so that the two support slot plates 64 move apart from each other. When they move apart into place (initial position, that is, the support slot plate 64 contacts the baffle), the action is stopped, and the second positioning cylinder 642 corresponding to the support slot plate 64 after mold closing is lifted (after lifting, there is no spatial interference with the tray 21). At this time, the second roller conveyor 5 continues to move to convey the last one to the turning frame 61. The upper sand box pallet 21, under the push of the next upper sand box pallet 21, the mold after the box is closed will be pushed onto the third roller conveyor 7. When the next lower sand box pallet 21 touches the second stroke switch 51, the above-mentioned previous operation is repeated, and then the flip frame 61 rotates 180° in the opposite direction, and then continues to be pushed into the next lower sand box pallet 21, and the closing operation is completed after positioning and clamping, thereby realizing a continuous production process; in the process of the next lower sand box pallet 21 being pushed in, the previous empty upper sand box pallet 21 will be pushed into the third roller conveyor 7 (when flipped to the bottom, the second positioning cylinder 642 corresponding to the support slot plate 64 has been lifted).

[0046] The aforementioned closing mold pushed onto the third roller conveyor 7 will be conveyed to the casting section along with the closing mold conveying section 71, and when the empty pallet 21 touches the third stroke switch 711 on the third roller conveyor 7, the third roller conveyor 7 stops moving. At the same time, the pushing cylinder 712 on its side starts to move, pushing the parked empty pallet 21 to the pallet conveying section 72, and then recycling it; it should be noted that the pushing cylinder 712 does not interfere with the pallet 21 in space after shrinking. For the empty pallet 21, no positioning is required during the conveying process, and it can be directly pushed to the pallet conveying section 72. The width of the pallet conveying section 72 must be greater than the width of the conveying mechanism 2.

[0047] The principle of the present invention is:

[0048] During the operation of the transportation device of the present invention, the conveying mechanism 2 carrying the sand box is first transported to the molding section. During the process, the setting of the guide wheel 23 and the first positioning cylinder 132 can accurately position the sand box under the molding machine, which is conducive to accurate molding; the screw lift 4 can lift the conveying mechanism 2 to avoid damage to the roller conveyor during the molding process. At the same time, the spring 46 between the support plate 3 and the screw lift 4 can provide a certain buffer for the impact of sand particles during the molding process, which helps to ensure the service life of the tray 21 in the conveying mechanism 2.

[0049] The molded sand boxes are transported one after another to the flipping and closing section for closing. During the process, the front sand box is the upper sand box, which will be flipped upwards during the closing process. The sand box will be reserved with pouring ports and air vents during the molding process. The rear sand box is the lower sand box, located at the bottom, used to support the upper sand box and complete the closing operation in the closing mechanism.

[0050] During the box closing operation, the box closing mechanism of the present invention is accurately positioned and stably turned over, so that a stable and accurate box closing operation can be achieved, and a continuous production process can be achieved.

[0051] After the mold is closed, it is sent to the casting section for casting. During the casting process, a conveying device is also involved. The structure of the conveying device is basically the same as that of the molding section, and will not be described here. However, the structure of this part should belong to the protection scope of the transportation mechanism of the present invention. The empty pallet 21 removed during the mold closing process is rotated through the pallet conveying section 72, the crane, etc. to achieve recycling.

[0052] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. Sand box transport device, characterized by: It comprises a conveying mechanism (2), a first roller conveyor (1), a second roller conveyor (5), a box turning and closing mechanism (6), and a third roller conveyor (7); the sand box is positioned and placed on the conveying mechanism (2); The first roller conveyor (1) is located in the molding section, the flipping and box closing mechanism (6) is located in the flipping and box closing section, the second roller conveyor (5) is used to connect the molding section and the flipping and box closing section, and the third roller conveyor (7) is located behind the flipping and box closing section; the first roller conveyor (1), the second roller conveyor (5), the flipping and box closing mechanism (6) and the third roller conveyor (7) are respectively matched with the conveying mechanism (2); the first roller conveyor (1), the second roller conveyor (5) and the third roller conveyor (7) realize the center positioning of the conveying mechanism (2) along the conveying direction; The first roller conveyor (1) is provided with a first positioning mechanism (13), and the first positioning mechanism (13) cooperates with the conveying mechanism (2) to realize the positioning of the conveying mechanism (2) relative to the molding machine in the molding section; the first roller conveyor (1) is provided with two liftable support plates (3), and the support plates (3) cooperate with the conveying mechanism (2) to lift and lower the conveying mechanism (2); the two support plates (3) respectively support the upper sand box and the lower sand box of the same workpiece; The second roller conveyor (5) cooperates with the flipping and closing mechanism (6), and the flipping and closing mechanism (6) is used to close the upper sand box and the lower sand box to form an integral mold, and separate the empty conveying mechanism (2); The third roller conveyor (7) cooperates with the turning and closing mechanism (6), and comprises a mold closing conveying section (71) and a pallet conveying section (72). The mold closing conveying section (71) is used for conveying the mold after closing the box, and the mold closing conveying section (71) goes to the casting section. The pallet conveying section (72) is used for conveying the empty conveying mechanism (2), and the pallet conveying section (72) goes to the pallet transfer section.

2. The sand box transport device according to claim 1, characterized in that: The first roller conveyor (1), the second roller conveyor (5) and the third roller conveyor (7) all include a frame (11) and a sprocket roller (12); the conveying mechanism (2) includes a tray (21), a placement groove (22) is provided on the tray (21), and the sand box is placed in the placement groove (22); guide wheels (23) are provided on both sides of the tray (21) close to the frame (11), and the guide wheels (23) cooperate with the frame (11), so that the conveying mechanism (2) is centrally positioned along the conveying direction through the guide wheels (23).

3. The sand box transport device according to claim 2, characterized in that: The two support plates (3) are respectively provided with first travel switches (14), and the first travel switches (14) cooperate with the conveying mechanism (2) and the first roller conveyor (1); the first positioning mechanism (13) is fixedly mounted on the frame (11), and the first positioning mechanism (13) comprises a bracket (131), and the bracket (131) is fixedly connected to the frame (11); a first positioning cylinder (132) is mounted on the bracket (131), and the lower end of the first positioning cylinder (132) is connected to the ball-shaped end head (133); a positioning groove (25) is provided on the conveying mechanism (2), and the positioning groove (25) cooperates with the ball-shaped end head (133); the positioning groove (25) is in a "Y" shape, and comprises an upper flaring section (251) and a lower diameter-reducing section (252); and the diameter of the diameter-reducing section (252) is consistent with the diameter of the ball-shaped end head (133).

4. The sand box transport device according to claim 3, characterized in that: The lower parts of the two support plates (3) are connected to the lead screw elevator (4), and a spring (46) is arranged between the mounting plate (45) of the lead screw elevator and the support plates (3).

5. The sand box transport device according to claim 3, characterized in that: A second travel switch (51) is provided at the front end of the second roller conveyor (5).

6. The sand box transport device according to claim 5, characterized in that: The turning and closing mechanism (6) is provided with a cylindrical turning frame (61), the turning frame (61) is connected to the turning drive mechanism (62) by transmission, the turning drive mechanism (62) drives the turning frame (61) to turn back and forth by 180 degrees, two supporting slot plates (64) are provided in the turning frame (61), the two supporting slot plates (64) are symmetrically arranged relative to the turning frame (61); the two supporting slot plates (64) are respectively matched with the upper sand box and the lower sand box, the supporting slot plates (64) are matched with the conveying mechanism (2) in limiting positioning, and the supporting slot plates (64) are matched with the upper sand box and the lower sand box in clamping and fixing; a lifting mechanism (632) is provided between the two supporting slot plates (64), and the lifting mechanism (632) is used for the two supporting slot plates (64) to approach and separate from each other.

7. The sand box transport device according to claim 6, characterized in that: The support slot plate (64) is in a "concave" shape, and limiting slots (641) are arranged on both sides of the support slot plate (64), and the limiting slots (641) cooperate with the tray (21). A second positioning cylinder (642) is arranged on the support slot plate (64), and the second positioning cylinder (642) cooperates with the positioning slot (25); a clamping cylinder (643) is arranged on the support slot plate (64), and the clamping cylinder (643) is clamped and cooperated with the sand box.

8. The sand box transport device according to claim 6, characterized in that: The lifting mechanism (632) includes a first rack (633) and a second rack (634); the first rack (633) and the second rack (634) are respectively connected to a supporting slot plate (64); the teeth of the first rack (633) and the second rack (634) are arranged opposite to each other; a lifting drive gear (635) is arranged between the first rack (633) and the second rack (634); the lifting drive gear (635) is connected to a box closing drive motor (631); and the box closing drive motor (631) is fixedly mounted on the turning frame (61).

9. The sand box transport device according to claim 6, characterized in that: The flipping and closing mechanism (6) cooperates with the third roller conveyor (7); a third stroke switch (711) is provided on the mold closing and conveying section (71); the third stroke switch (711) cooperates with the empty conveying mechanism (2) and the third roller conveyor (7); a push cylinder (712) is provided on one side of the third roller conveyor (7); the push cylinder (712) cooperates with the empty conveying mechanism (2); the push cylinder (712) pushes the empty conveying mechanism (2) to the pallet transfer section; the width of the pallet transfer section is greater than the width of the conveying mechanism (2).

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