Automatic pouring device for sand mold casting

Abstract

The invention provides a sand mold casting automatic pouring device which comprises a steel ladle and a conveying roller assembly, the output end of the conveying roller assembly is connected with one end of a movable frame, the steel ladle is in sliding connection with the inner side wall of the movable frame in the length direction of the movable frame, and a locking mechanism is arranged on the movable frame; under the action of the locking mechanism, the steel ladle stops moving and is locked through the locking mechanism, the steel ladle and the locking mechanism are driven by the driving assembly to slide towards the other end of the movable frame, after the steel ladle slides in place, the overturning air cylinder pushes upwards to drive the movable frame to overturn, and the steel ladle inclines downwards synchronously along with the movable frame. The pouring of molten metal liquid in the steel ladle is realized; the whole process is high in automation degree, direct pouring operation through manual operation is avoided, the whole pouring process is more stable, and the pouring quality can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of sand casting, in particular to an automatic pouring device for sand casting. Background Art

[0002] Sand casting refers to a casting method that produces castings in sand molds. 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 easy to manufacture, and it can adapt to single-room production, batch production and mass production of castings, it has long been the basic process in casting production.

[0003] In the existing casting process, the sand mold is continuously transported forward by a conveyor belt, and a pouring device is arranged above the conveyor belt. The pouring device generally includes a trolley, which is arranged above the conveyor belt through rollers, and a ladle is installed on the trolley. As a container for molten metal, the ladle has a very high temperature. It is usually lifted to the trolley by a crane and moved to the top of the sand mold to be poured by the trolley. During pouring, the ladle is tilted by manually driving the hand wheel so that the molten metal in the ladle is poured into the sand mold below.

[0004] During the pouring process, due to the heavy weight of the ladle + molten metal, the pouring speed is difficult to control when the ladle is tilted and poured manually by using a hand wheel, which can easily cause the molten metal to splash or shake during the pouring process, easily causing harm to the operators and causing dangerous accidents; in addition, the splashing molten metal can easily cause a waste of resources, and the entire process is carried out manually, with a low degree of automation and low efficiency. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide an automatic pouring device for sand casting to solve the problems of low automation and low efficiency caused by relying on manual operation in the existing sand casting process.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The present application provides an automatic pouring device for sand casting, which comprises a ladle and a conveying roller assembly for horizontally conveying the ladle, the output end of the conveying roller assembly is connected with one end of a movable frame, the ladle and the inner side wall of the movable frame form a sliding connection along the length direction of the movable frame, the movable frame is provided with a locking mechanism, the locking mechanism and the movable frame form a sliding connection along the length direction of the frame, the locking mechanism cooperates with the ladle for locking the ladle, the locking mechanism is connected with a driving assembly for driving the locking mechanism to slide along the movable frame, the other end of the movable frame is hingedly installed with a fixed frame, the fixed frame is installed at the bottom end of the movable frame, and a turning cylinder is installed at one end of the fixed frame adjacent to the conveying roller assembly, one end of the piston of the turning cylinder is connected with the bottom of the movable frame, and is used to drive the movable frame to turn up and down relative to the fixed frame.

[0008] Furthermore, the locking mechanism includes a gantry slide, a telescopic cylinder and a stop pin assembly, the bottom end of the gantry frame is slidably mounted on the top of the movable frame by being provided with a slide rail, the telescopic cylinder is vertically fixedly mounted on the top of the movable frame, a latch is installed on the piston rod of the telescopic cylinder, sliding arms extending horizontally outward are formed on opposite sides of the outer surface of the ladle, a latch hole penetrating from top to bottom is formed on the sliding arm, sliding grooves matching the sliding arms are formed on the inner side walls on opposite sides of the movable frame, and a A blocking hole, wherein the stop pin assembly cooperates with the blocking hole to achieve limited blocking of the sliding arm, the stop pin assembly is connected to the piston rod of the telescopic cylinder, and the moving direction of the stop pin assembly is opposite to the moving direction of the piston rod of the telescopic cylinder, wherein when the piston rod of the telescopic cylinder is in the retracted original position, the stop pin assembly is installed in the blocking hole, and when the pin on the telescopic cylinder is inserted into the pin hole, the stop pin assembly disengages from the blocking hole and moves to the top of the groove wall of the slide slot, so that the sliding arm can slide along the slide slot.

[0009] Furthermore, the stop pin assembly includes a stop pin, one end of which is connected to a steel wire rope, the other end of which is fixedly connected to one end of a connecting rod, the other end of which is horizontally fixedly mounted on the piston rod, a guide wheel is mounted on the inner side wall of the movable frame, and the steel wire rope is wound around the outer surface of the guide wheel.

[0010] Furthermore, a through hole penetrating from top to bottom is formed on the gantry slide at a position corresponding to the blocking hole, and one end of the steel wire rope passes through the through hole and is fixedly connected to the blocking pin.

[0011] Furthermore, the through hole includes a first through hole portion located at the bottom and a second through hole portion located at the top, the second through hole portion is connected to the first through hole portion, the opening size of the first through hole portion is larger than the opening size of the second through hole portion, the opening size of the second through hole portion is smaller than the outer diameter size of the pin, a cavity is formed inside the pin, a spring is installed in the cavity, one end of the spring is fixedly installed at the bottom end of the cavity of the pin, and the other end of the spring is fixedly installed on a connecting plate, the connecting plate is installed at the upper end of the cavity, and one end of the wire rope is fixedly connected to the connecting plate for driving the connecting plate to telescopically move relative to the cavity.

[0012] Furthermore, an arc-shaped groove matching the outer surface of the ladle is formed at one end of the movable frame away from the conveying roller assembly.

[0013] Furthermore, a pair of slide arms are formed on each side of the ladle, and the pair of slide arms are arranged in parallel up and down. The inner wall of each side of the movable frame is formed with a pair of slide grooves arranged in parallel up and down and respectively slidably cooperate with the pair of slide arms.

[0014] Furthermore, the driving assembly is a ball screw nut assembly, and the ball screw nut assembly is fixedly mounted on opposite sides of the movable frame.

[0015] The beneficial effects of the present invention are:

[0016] 1. By adopting the above-mentioned automatic pouring device for sand casting, the ladle containing molten metal liquid is horizontally conveyed to one end of the movable frame by the conveying roller assembly. Under the action of inertia, the ladle slides horizontally into the inner cavity of the movable frame and continues to slide forward. Under the action of the locking mechanism, the ladle stops moving and is locked by the locking mechanism to prevent the ladle from moving relative to the locking mechanism. The ladle and the locking mechanism are driven by the driving assembly to slide to the other end of the movable frame. After the ladle slides into place, the turning cylinder pushes upward to drive the movable frame to turn over, and the ladle synchronously follows the movable frame to tilt downward to realize the pouring of the molten metal liquid in the ladle; after the ladle is poured, the turning cylinder drives the movable frame to turn and reset, and the ladle moves horizontally in the opposite direction and resets under the action of the driving assembly, and when the ladle moves along the movable frame to the position near the conveying roller assembly, the locking assembly is actuated to release the lock of the ladle and block and limit the ladle, so that the ladle is in a stationary state. The whole process has a high degree of automation, avoiding direct pouring operation by manual operation, and the whole pouring process is more stable, which can improve the pouring quality;

[0017] 2. By adopting the structure of the stop pin assembly, when the piston rod of the telescopic cylinder is in the original retracted state, the stop pin falls due to its own weight and enters into the blocking hole in the slide slot. In this way, when the moving ladle enters the movable frame, the stop pin contacts the ladle, making the ladle in a static state; then the piston rod of the telescopic cylinder extends and moves downward, and the piston rod in the downward extending and moving state drives the stop pin to rise upward, so that the stop pin disengages from the blocking hole, and when the pin on the piston rod is inserted into the pin hole on the sliding arm on the ladle, the stop pin rises upward and disengages from the slide slot, so that the ladle can slide along the slide slot normally; the setting of the above-mentioned stop pin assembly cleverly realizes the mutual coordination between blocking and locking of the ladle, solves the functions of automatic static and locking of the ladle, and ensures the automation of the ladle casting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main view structure of the ladle being transported forward by the conveying roller assembly in the automatic pouring device for sand casting in an embodiment of the present application.

[0019] Figure 2 This is a schematic diagram of the main view of the structure when the ladle enters the movable frame in the automatic pouring device for sand casting in an embodiment of the present application.

[0020] Figure 3 This is a schematic diagram of the structure in the main view direction when the ladle enters the other end of the movable frame in the automatic pouring device for sand casting in an embodiment of the present application.

[0021] Figure 4 This is a schematic diagram of the three-dimensional directional structure when the ladle enters the movable frame in the automatic pouring device for sand casting in an embodiment of the present application.

[0022] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at A in the figure.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the ladle in the embodiment of the present application when it slides forward along the movable frame.

[0024] Figure 7 for Figure 6 Schematic diagram of the local enlarged structure at point B in the figure.

[0025] Figure 8 This is a schematic diagram of the three-dimensional directional structure when the ladle enters the other end of the movable frame in the automatic pouring device for sand casting according to an embodiment of the present application.

[0026] Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure at point C in the figure.

[0027] Fig.10This is a schematic diagram of the structural state of the ladle during pouring in an embodiment of the present application.

[0028] Fig.11 It is a schematic diagram of the three-dimensional directional structure of the locking mechanism and the gantry in the automatic pouring device for sand casting in the embodiment of the present application.

[0029] Fig.12 This is a schematic diagram of the structure of the gantry in the embodiment of the present application from a side view.

[0030] Fig.13 for Fig.12 Schematic diagram of the cross-sectional structure at DD in the figure.

[0031] Fig.14 This is a schematic diagram of the three-dimensional directional structure of the locking mechanism in the automatic pouring device for sand casting according to an embodiment of the present application.

[0032] Fig.15 for Fig.14 Schematic diagram of the local enlarged structure at E in the figure.

[0033] Fig.16 It is a schematic diagram of the longitudinal cross-sectional structure of the retaining pin in the embodiment of the present application.

[0034] In the figure:

[0035] 10-sand casting automatic pouring device, 100-conveying roller assembly, 200-ladle, 201-slide arm, 202-pin hole, 300-fixed frame, 400-movable frame, 401-slide groove, 402-blocking hole, 500-locking mechanism, 501-gantry slide, 5011-first through hole portion, 5012-second through hole portion, 502-telescopic cylinder, 503-stop pin assembly, 5031-wire rope, 5032-stop pin, 5033-guide wheel, 5034-connecting rod, 600-driving assembly, 700-flip cylinder. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] See attached Figure 1 To Attachment Fig.16 As shown, this embodiment provides a sand casting automatic pouring device 10, which includes a ladle 200, a conveying roller assembly 100, a movable frame 400, a locking mechanism 500, a driving assembly 600, a fixed frame 300 and a turning cylinder 700.

[0038] The conveyor roller assembly 100 is arranged at one end of the movable frame 400. The function of the conveyor roller assembly 100 is to provide power for the movement of the ladle 200, and to convey the ladle 200 to move linearly back and forth. The output end of the conveyor roller assembly 100 is adjacent to one end of the movable frame 400, so that the ladle 200 on the conveyor roller assembly 100 can slide into the inner cavity of the movable frame 400 under the action of inertia.

[0039] See attached Figure 6 and attached Figure 7 As shown, slide arms 201 extending outward horizontally are formed on the left and right sides of the outer surface of the ladle 200, and pin holes 202 penetrating from top to bottom are formed on the slide arms 201. Slide grooves 401 cooperating with the slide arms 201 are formed on the inner side walls on the opposite sides of the movable frame 400, and blocking holes 402 are formed on the slide grooves 401 near the conveying roller assembly 100. In order to ensure the installation stability of the ladle 200 in the movable frame 400, a pair of slide arms 201 are formed on each side of the ladle 200, and the pair of slide arms 201 are arranged in parallel up and down, and a pair of slide grooves 401 arranged in parallel up and down and respectively slidingly cooperating with the pair of slide arms 201 are formed on the inner side wall of each side of the movable frame 400.

[0040] The locking mechanism 500 forms a sliding connection with the movable frame 400 along the length direction of the frame, and the locking mechanism 500 cooperates with the ladle 200 to lock the ladle 200. Specifically, the locking mechanism 500 includes a gantry slide 501, a telescopic cylinder 502, and a stop pin assembly 503. The bottom end of the gantry frame is slidably mounted on the top of the movable frame 400 by providing a slide rail, and the telescopic cylinder 502 is vertically fixedly mounted on the top of the movable frame 400. A latch is installed on the piston rod of the telescopic cylinder 502.

[0041] The stop pin assembly 503 cooperates with the blocking hole 402 to achieve a limited blocking of the sliding arm 201. The stop pin assembly 503 is connected to the piston rod of the telescopic cylinder 502. The moving direction of the stop pin assembly 503 is opposite to the moving direction of the piston rod of the telescopic cylinder 502. When the piston rod of the telescopic cylinder 502 is in the retracted original position, the stop pin assembly 503 is installed in the blocking hole 402. When the pin on the telescopic cylinder 502 is inserted into the pin hole 202, the stop pin assembly 503 disengages from the blocking hole 402 and moves to the top of the groove wall of the slide groove 401, so that the sliding arm 201 can slide along the slide groove 401.

[0042] See attached Fig.11 To Attachment Fig.15As shown, specifically, the stop pin assembly 503 includes a stop pin 5032, one end of the stop pin 5032 is connected to a wire rope 5031, the other end of the wire rope 5031 is fixedly connected to one end of a connecting rod 5034, the other end of the connecting rod 5034 is horizontally fixedly installed on the piston rod, and a guide wheel 5033 is installed on the inner wall of the movable frame 400, and the wire rope 5031 is wound around the outer surface of the guide wheel 5033, so that the wire rope 5031 can move up and down through the outer surface of the guide wheel 5033.

[0043] See attached Fig.11 To Attachment Fig.16 As shown, a through hole is formed on the gantry slide 501 at a position corresponding to the blocking hole 402, and one end of the steel wire 5031 passes through the through hole and is fixedly connected to the blocking pin. The through hole includes a first through hole portion 5011 located at the bottom and a second through hole portion 5012 located at the top, the second through hole portion 5012 is connected to the first through hole portion 5011, the opening size of the first through hole portion 5011 is larger than the opening size of the second through hole portion 5012, and the opening size of the second through hole portion 5012 is smaller than the outer diameter size of the plug, a cavity is formed inside the plug, a spring is installed in the cavity, one end of the spring is fixedly installed at the bottom end of the cavity of the plug, and the other end of the spring is fixedly installed on a connecting piece provided, the connecting piece is installed at the upper end of the cavity, and one end of the steel wire 5031 is fixedly connected to the connecting piece, which is used to drive the connecting piece to move telescopically relative to the cavity. The reason why the opening size of the first through hole portion 5011 is larger than the opening size of the second through hole portion 5012, and the opening size of the second through hole portion 5012 is smaller than the outer diameter size of the plug pin, is that in the process of the piston rod driving the plug pin to move downward, as the piston rod continues to move downward, the stop pin 5032 will first enter the first through hole and move upward along the first through hole. When the upper end of the stop pin 5032 contacts the top position of the first through hole, since the opening size of the second through hole is smaller than the outer diameter size of the stop pin 5032, the stop pin 5032 032 is unable to enter the second through hole and continue to move upward. At this time, as the piston rod continues to move downward, the piston rod will drive the wire rope 5031 to move downward, and the wire rope 5031 moving downward will drive the spring in the stop pin 5032 at the other end to move upward, so that the spring is in a stretched state, thereby preventing the stop pin 5032 from moving further upward, and when the piston rod moves upward subsequently, after the piston rod moves a certain distance, the stop pin 5032 can quickly and directly enter the blocking hole 402 in the slide groove 401.

[0044] By adopting the structure of the stop pin assembly 503, when the piston rod of the telescopic cylinder 502 is in the original retracted state, the stop pin 5032 falls due to its own weight and enters into the blocking hole 402 in the slide groove 401, so that when the moving ladle 200 enters the movable frame 400, the stop pin 5032 contacts the ladle 200, so that the ladle 200 is in a stationary state; then the piston rod of the telescopic cylinder 502 stretches and moves downward, and the piston rod in the downward stretching movement state drives the stop pin 5032 to rise upward , causing the stop pin 5032 to disengage from the blocking hole 402. When the pin on the piston rod is inserted into the pin hole 202 on the slide arm 201 on the ladle 200, the stop pin 5032 rises upward and disengages from the slide groove 401, allowing the ladle 200 to slide along the slide groove 401 normally. The setting of the above-mentioned stop pin assembly 503 cleverly realizes the mutual coordination between blocking and locking of the ladle 200, solves the function of automatic stillness and locking of the ladle 200, and ensures the automation of the casting process of the ladle 200.

[0045] In addition, by installing a spring inside the stop pin 5032, the setting of the spring cooperates with the first through hole and the second through hole. Such a setting can make it possible for when the ladle 200 completes the pouring operation, when the driving assembly 600 drives it to move along the movable frame 400 toward one end of the conveying roller assembly 100, when the ladle 200 moves to the input end near the conveying roller assembly 100, the ladle 200 needs to change from a moving state to a stationary state. At this time, it is necessary to rely on the stop pin 5032 to be inserted into the blocking hole 402 in the slide groove 401, and utilize the stop pin 5032 to interfere with the slide arm 201 on the outside of the ladle 200, so as to cause the ladle 200 to be in a stationary state. In this regard, when the ladle 200 in this embodiment moves in the opposite direction along the movable frame 400 to reset (i.e., moves toward the side of the conveying roller assembly 100), when the ladle 200 is close to one end of the conveying roller assembly 100, the piston rod of the telescopic cylinder 502 drives the pin to move upward, so that the pin is disengaged from the pin hole 202 on the slide arm 201. When the piston rod moves upward, it drives the wire rope 5031 to fall downward through the connecting rod 5034, and when the slide arm 201 moves to the front of the blocking hole 402, the blocking pin 5032 falls by its own weight and is inserted into the blocking hole 402 in the slide groove 401. At this time, the piston rod also drives the pin to be completely withdrawn from the pin hole 202 on the slide arm 201 (because the telescopic cylinder 502 and the ladle 200 are in a relatively static state when moving, the piston rod can completely drive the pin to be withdrawn from the pin hole 202 on the slide arm 201). The moving ladle 200 will touch the blocking pin 5032, causing the ladle 200 to stop on the movable frame 400. Then the staff on both sides can transfer the ladle 200 to the conveying roller assembly 100, and the conveying pipe assembly drives the ladle 200 to move backward to hold the molten metal liquid for the next pouring work.

[0046] See attached Figure 8 and attached Fig. 9 As shown, an arc-shaped groove matching the outer surface of the ladle 200 is formed at one end of the movable frame 400 away from the conveying roller assembly 100. The setting of the arc-shaped groove can make the ladle 200 fit better on the movable frame 400. The movable frame 400 provides better support for the ladle 200 and prevents the ladle 200 from rolling.

[0047] See attached Fig.10 As shown, the other end of the movable frame 400 is hingedly mounted with a fixed frame 300, the fixed frame 300 is mounted at the bottom end of the movable frame 400, and a turning cylinder 700 is mounted at one end of the fixed frame 300 adjacent to the conveying roller assembly 100, and one end of the piston of the turning cylinder 700 is connected to the bottom of the movable frame 400. When the ladle 200 is horizontally transported to the other end of the movable frame 400, that is, when the ladle 200 fits the arc groove on the movable frame 400, the turning cylinder 700 is actuated, and the piston rod of the turning cylinder 700 is pushed upward, driving the movable frame 400 to turn up and down relative to the fixed frame 300. At this time, one end of the movable frame 400 is in a downward tilted state, and the molten metal liquid in the ladle 200 can automatically flow downward for pouring.

[0048] By adopting the above-mentioned automatic pouring device for sand casting, the ladle 200 containing molten metal is horizontally conveyed to one end of the movable frame 400 by the conveying roller assembly 100. Under the action of inertia, the ladle 200 slides horizontally into the inner cavity of the movable frame 400 and continues to slide forward. Under the action of the locking mechanism 500, the ladle 200 stops moving and is locked by the locking mechanism 500 to prevent the ladle 200 from moving relative to the locking mechanism 500. The ladle 200 and the locking mechanism 500 slide toward the other end of the movable frame 400 driven by the driving assembly 600. After the ladle 200 slides into place, the flipping cylinder 700 pushes upward to drive the movable frame 400 to flip, and the ladle 200 is moved. The ladle 200 synchronously follows the movable frame 400 to tilt downward, so as to realize the pouring of the molten metal liquid in the ladle 200; after the pouring of the ladle 200 is completed, the turning cylinder 700 drives the movable frame 400 to turn and reset, and the ladle 200 moves horizontally in the opposite direction and resets under the action of the driving assembly 600, and when the ladle 200 moves along the movable frame 400 to the position near the conveying roller assembly 100, the locking assembly is actuated to release the lock of the ladle 200, and the ladle 200 is blocked and limited, so that the ladle 200 is in a stationary state. The whole process has a high degree of automation, avoiding direct manual operation to perform pouring operations, and the whole pouring process is smoother, which can improve the pouring quality.

[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An automatic pouring device for sand casting, characterized in that: The automatic pouring device for sand casting comprises a ladle and a conveying roller assembly for horizontally conveying the ladle. The output end of the conveying roller assembly is connected with one end of a movable frame, and the ladle is connected with the inner side wall of the movable frame to form a sliding connection along the length direction of the movable frame. The movable frame is provided with a locking mechanism, and the locking mechanism and the movable frame form a sliding connection along the length direction of the frame. The locking mechanism cooperates with the ladle to lock the ladle, and the locking mechanism is connected with a driving assembly to drive the locking mechanism to slide along the movable frame. The other end of the movable frame is hingedly installed with a fixed frame, and the fixed frame is installed at the bottom end of the movable frame. A turning cylinder is installed at one end of the fixed frame adjacent to the conveying roller assembly, and one end of the piston of the turning cylinder is connected with the bottom of the movable frame, for driving the movable frame to turn up and down relative to the fixed frame.

2. The automatic pouring device for sand casting according to claim 1, characterized in that: The locking mechanism includes a gantry slide, a telescopic cylinder and a stop pin assembly. The bottom end of the gantry frame is slidably mounted on the top of the movable frame by means of a slide rail. The telescopic cylinder is vertically fixedly mounted on the top of the movable frame. A latch pin is mounted on the piston rod of the telescopic cylinder. Slide arms extending horizontally outward are formed on opposite sides of the outer surface of the ladle. A latch pin hole penetrating from top to bottom is formed on the slide arm. Slide grooves matching the slide arms are formed on the inner side walls on opposite sides of the movable frame. A blocking hole is formed on the slide groove near the conveying roller assembly. The stop pin assembly cooperates with the blocking hole to achieve limited blocking of the sliding arm. The stop pin assembly is connected to the piston rod of the telescopic cylinder. The moving direction of the stop pin assembly is opposite to the moving direction of the piston rod of the telescopic cylinder. When the piston rod of the telescopic cylinder is in the retracted original position, the stop pin assembly is installed in the blocking hole. When the pin on the telescopic cylinder is inserted into the pin hole, the stop pin assembly disengages from the blocking hole and moves to the top of the groove wall of the slide slot, so that the sliding arm can slide along the slide slot.

3. The automatic pouring device for sand casting according to claim 2, characterized in that: The stop pin assembly includes a stop pin, one end of which is connected to a steel wire rope, the other end of which is fixedly connected to one end of a connecting rod, the other end of which is horizontally fixedly mounted on the piston rod, a guide wheel is mounted on the inner side wall of the movable frame, and the steel wire rope is wound around the outer surface of the guide wheel.

4. The automatic pouring device for sand casting according to claim 3, characterized in that: A through hole penetrating from top to bottom is formed on the gantry slide at a position corresponding to the blocking hole, and one end of the steel wire rope passes through the through hole and is fixedly connected to the blocking pin.

5. The automatic pouring device for sand casting according to claim 4, characterized in that: The through hole includes a first through hole portion located at the bottom and a second through hole portion located at the top, the second through hole portion is connected to the first through hole portion, the opening size of the first through hole portion is larger than the opening size of the second through hole portion, the opening size of the second through hole portion is smaller than the outer diameter size of the plug, a cavity is formed inside the plug, a spring is installed in the cavity, one end of the spring is fixedly installed at the bottom end of the cavity of the plug, and the other end of the spring is fixedly installed on a connecting piece, and the connecting piece is installed at the upper end of the cavity, and one end of the wire rope is fixedly connected to the connecting piece for driving the connecting piece to telescopically move relative to the cavity.

6. The automatic pouring device for sand casting according to claim 1, characterized in that: An arc-shaped groove matching the outer surface of the ladle is formed at one end of the movable frame away from the conveying roller assembly.

7. An automatic pouring device for sand casting according to any one of claims 1 to 6, characterized in that: A pair of slide arms is formed on each side of the ladle, and the pair of slide arms are arranged in parallel up and down. A pair of slide grooves arranged in parallel up and down and respectively slidably cooperate with the pair of slide arms are formed on the inner side wall of each side of the movable frame.

8. The automatic pouring device for sand casting according to claim 2, characterized in that: The driving assembly is a ball screw nut assembly, and the ball screw nut assembly is fixedly mounted on opposite sides of the movable frame respectively.

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