Casting pouring device of nodular cast iron crankshaft for air compressor

Abstract

The invention belongs to the technical field of casting and pouring, and particularly relates to a casting and pouring device of a nodular cast iron crankshaft for an air compressor, which comprises a base, a conveyor, an automatic pouring mechanism, a pouring guide mechanism, a pouring height regulation and control mechanism, a pouring speed control mechanism and an infrared positioning mechanism. Through the automatic pouring and guiding mechanism, molten iron injection is accurately guided, and waste and hidden danger are avoided; the clamping frame is matched with the externally-expanded circular plate, the stable circular shell, the dispersed weight, the reinforced rotating shaft and the improved pouring stability, the pouring height and the pouring speed can be automatically adjusted according to the size of the pouring gate, the small pouring gate slows down to prevent blockage, the large pouring gate accelerates to improve efficiency, and the molten iron pouring quality and efficiency are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of casting pouring, and in particular relates to a casting pouring device for a nodular cast iron crankshaft used in an air compressor. Background Art

[0002] An air compressor is a device used to compress gas, and its structure is similar to that of a water pump. Common types of air compressors include reciprocating piston type, rotary vane type, and rotary screw type. Centrifugal compressors are generally applied to large programs. As a core component of an air compressor, the performance of the crankshaft has a direct impact on the service life of the air compressor. Nodular cast iron crankshafts are usually manufactured by a process of pouring molten iron into a special mold.

[0003] Currently, when casting and pouring a nodular cast iron crankshaft, the pouring speed is relatively fixed. For castings with complex shapes, such as those with deep cavities, narrow channels, or multiple cavities, in order to ensure that the molten iron fills each part evenly and smoothly and avoid turbulence, splashing, or insufficient filling, the gate is usually designed to be of a smaller size; for castings with simple shapes, such as flat plates or regular-shaped castings, the design of the gate size is relatively flexible, and a larger single gate can be used to improve the pouring efficiency. For molds with a small gate, if a relatively fast molten iron pouring speed is used, it will cause the molten iron to block or splash at the gate, affecting the pouring quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a casting pouring device for a nodular cast iron crankshaft used in an air compressor in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A casting pouring device for a nodular cast iron crankshaft used in an air compressor, including a base, and further including: A conveyor, fixedly installed on the front side of the upper end of the base, for transferring the mold to be poured; An automatic pouring mechanism, fixedly installed on the rear side of the upper end of the base; A pouring guiding mechanism, fixedly installed on the automatic pouring mechanism, for guiding the poured molten iron; A pouring height regulating mechanism, fixedly installed between the base and the automatic pouring mechanism, for regulating the pouring height; A pouring speed control mechanism, fixedly installed on the pouring height regulating mechanism and in transmission connection with the pouring height regulating mechanism, for controlling the pouring speed of the automatic pouring mechanism; An infrared positioning mechanism, fixedly installed on the front side of the automatic pouring mechanism and corresponding to the position of the lower discharge port of the pouring guiding mechanism.

[0006] In the above-mentioned casting and pouring device for a ductile iron crankshaft for an air compressor, the automatic pouring mechanism includes a U-shaped support plate fixedly mounted on the rear side of the upper end of the base, the upper end of the U-shaped support plate is symmetrically fixed with two hydraulic push rods, the lower movable ends of the two hydraulic push rods are fixedly connected to the same fixed frame, the side walls on the opposite sides of the fixed frame are rotatably connected to a clamping frame through a rotating shaft, the same iron bucket is fixedly mounted inside the two ends of the clamping frame, a bidirectional motor is fixedly mounted at the lower end of the fixed frame, the output ends of both ends of the bidirectional motor are transmission-connected to the rotating shaft through a sprocket assembly, and a protective cover shell covering the bidirectional motor and the sprocket assembly is fixedly mounted on the outer wall of the fixed frame.

[0007] In the above-mentioned casting and pouring device for a ductile iron crankshaft for an air compressor, the pouring guide mechanism includes a mounting shell fixedly mounted on the upper end of the fixed frame, a plurality of positioning slide rods are symmetrically and fixedly connected to the inner wall of the mounting shell, a plurality of positioning slide rods are externally slidably sleeved with the same mounting plate, a pressure sensing plate arranged opposite to the mounting plate is fixedly mounted on the top of the inner wall of the mounting shell, two L-shaped extension rods are symmetrically and fixedly connected to the front side of the mounting plate, and the lower ends of the two L-shaped extension rods are fixedly connected to the same guide funnel.

[0008] In the above-mentioned casting and pouring device of a ductile iron crankshaft for an air compressor, the pouring height control mechanism includes two magnetic vertical rods fixedly installed front and rear on the upper end of the base, the upper end of the magnetic vertical rod is fixedly connected with an anti-slip plate, the two magnetic vertical rods are externally slidably sleeved with the same electromagnetic sliding seat, the side wall of the electromagnetic sliding seat is fixedly connected with a control shell, the inner wall of the control shell is rotatably connected with a vertically arranged synchronous screw, the upper end of the control shell is fixedly installed with a synchronous motor for driving the synchronous screw to rotate, the rod wall of the synchronous screw is threadedly sleeved with a synchronous seat, one side of the upper end of the synchronous seat is fixedly connected with a synchronous rod of a U-shaped structure, one end of the synchronous rod passes through the upper end of the control shell, and is fixedly connected with an in-place switch, one side of the fixed frame is fixedly connected with a connecting rod, the end of the connecting rod away from the fixed frame passes through the side wall of the U-shaped support plate through a strip opening opened in the side wall of the U-shaped support plate, the end of the connecting rod away from the fixed frame is also fixedly connected with a connecting electromagnetic plate magnetically connected to the control shell, and the outer wall of the control shell is made of a magnetic metal material.

[0009] In the above-mentioned casting and pouring device for a ductile iron crankshaft for an air compressor, the pouring speed control mechanism includes a knob potentiometer fixedly mounted on one side of the lower end of the regulating shell, and a reduction gear box is also fixedly mounted on the lower end of the regulating shell, the lower end of the synchronous screw passes through the lower end of the regulating shell and is fixedly connected to the input end of the reduction gear box, the output end of the reduction gear box is fixedly connected to a linkage shaft, and the end of the linkage shaft away from the reduction gear box is fixedly connected to the center of the rotating end of the knob potentiometer.

[0010] In the above-mentioned casting and pouring device for a ductile iron crankshaft used in an air compressor, the infrared positioning mechanism includes two side plates symmetrically and fixedly connected to the front end of the protective housing, and an infrared emitter and an infrared receiver are respectively arranged on the two side plates and are oppositely disposed.

[0011] In the above-mentioned casting and pouring device for a ductile iron crankshaft used in an air compressor, an outward-expanded circular plate is fixedly sleeved on the shaft wall of the rotating shaft, a stable circular shell slidably connected to the outward-expanded circular plate is fixedly arranged on the outer wall of the fixed frame, a through hole for the rotating shaft to extend out is opened at the center of the stable circular shell, and a plurality of universal ball bearings are equidistantly arranged on one side of the outward-expanded circular plate close to the fixed frame.

[0012] In the above-mentioned casting and pouring device for a ductile iron crankshaft used in an air compressor, a limit slider is fixedly connected to the outer wall of the synchronous seat, and a limit sliding groove matched with the limit slider is opened on the inner wall of the control shell.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By setting the automatic pouring mechanism and the pouring guiding mechanism, a more precise guiding structure can be provided during the pouring of molten iron, avoiding the problem that when the initial molten iron is poured, it is easy for the molten iron to not be directly and accurately injected into the gate of the mold, thereby causing waste of molten iron and potential safety hazards. Moreover, by providing a rotational tilting force to the molten iron bucket through the clamping frame, the weight of the molten iron bucket and the internal molten iron can be more evenly distributed to the supporting structure through the rotating shaft, avoiding single-point stress or excessive local stress, thereby reducing the shaking and deviation of the molten iron bucket during rotation and improving the stability of molten iron pouring. The setting of the outward-expanded circular plate and the stable circular shell further strengthens the installation structure of the rotating shaft, avoiding the problem that the rotating shaft is easily deformed and shaken due to excessive force, thereby affecting the stability of molten iron pouring.

[0014] 2. By setting the pouring height control mechanism and the infrared positioning mechanism, the size of the mold gate can be quickly detected, and the pouring height can be automatically adjusted based on the size of the mold gate, so that the larger the size of the mold gate, the higher the pouring height. Because a large gate increases the flow cross-sectional area of the molten iron and is more easily interfered by external factors such as air resistance and surrounding airflows, resulting in unstable flow. Increasing the distance between the bottom of the guiding funnel and the mold gate can allow the molten iron to form a relatively stable flow stream during the falling process, reducing phenomena such as splashing and turbulence, and enabling the molten iron to enter the gate relatively smoothly, improving the quality of the casting. On the contrary, for a small gate with a small size, if the distance between the guiding funnel and the mold gate is too large, the molten iron is likely to deviate from the center of the gate due to various factors during the falling process, resulting in some molten iron being unable to enter the gate or even blocking the gate, causing the filling process to be interrupted.

[0015] 3. Through the set pouring height regulation mechanism and pouring speed control mechanism, the pouring speed can be automatically regulated based on the gate size of the mold, so that the smaller the gate size, the slower the pouring speed. Because a smaller gate means a smaller cross-sectional area. If the pouring speed is too fast, the molten iron flow rate passing through the gate per unit time will be too large, exceeding the flow capacity of the gate, and the molten iron is likely to accumulate at the gate, thus causing blockage. On the contrary, a larger gate size can increase the pouring speed and thus improve the pouring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a front cross-sectional structural schematic diagram of the present invention; Figure 3 is a partial cross-sectional structural schematic diagram of the automatic pouring mechanism of the present invention; Figure 4 is Figure 3 a three-dimensional cross-sectional structural schematic diagram of the installation of the outer expansion circular plate and the stable circular shell in the present invention; Figure 5 is a three-dimensional structural schematic diagram of the pouring guiding mechanism of the present invention; Figure 6 is a three-dimensional cross-sectional structural schematic diagram of the pouring height regulation mechanism and the pouring speed control mechanism of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the infrared positioning mechanism of the present invention.

[0017] In the figure: 1 base, 2 automatic pouring mechanism, 21 U-shaped support plate, 22 hydraulic push rod, 23 fixed frame, 24 rotating shaft, 25 clamping frame, 26 iron water bucket, 27 bidirectional motor, 28 sprocket assembly, 29 protective cover shell, 210 outer expansion circular plate, 211 stable circular shell, 212 universal ball, 3 pouring guiding mechanism, 31 installation shell, 32 positioning slide bar, 33 installation plate, 34 pressure sensing plate, 35 L-shaped extension rod, 36 guiding funnel, 4 pouring height regulation mechanism, 41 magnetic vertical rod, 42 anti-detachment plate, 43 electromagnetic sliding seat, 44 regulation shell, 45 synchronous screw, 46 synchronous motor, 47 synchronous seat, 48 synchronous rod, 49 in-place switch, 410 connecting rod, 411 connecting electromagnetic plate, 5 pouring speed control mechanism, 51 knob potentiometer, 52 reduction gearbox, 53 linkage shaft, 6 infrared positioning mechanism, 61 side plate, 62 infrared emitter, 63 infrared receiver, 7 conveyor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Such asFigures 1-7 As shown, a casting and pouring device for a ductile iron crankshaft for an air compressor comprises a base 1 and also comprises: The conveyor 7 is fixedly mounted on the front side of the upper end of the base 1 and is used to transfer the mold to be poured; The automatic pouring mechanism 2 is fixedly mounted on the upper rear side of the base 1. The automatic pouring mechanism 2 includes a U-shaped support plate 21 fixedly mounted on the upper rear side of the base 1. Two hydraulic push rods 22 are symmetrically fixedly sleeved on the upper end of the U-shaped support plate 21. The lower movable ends of the two hydraulic push rods 22 are fixedly connected to the same fixed frame 23. The side walls on the opposite side of the fixed frame 23 are rotatably connected to the clamping frame 25 through the rotating shaft 24. The same iron bucket 26 is fixedly mounted inside the two ends of the clamping frame 25. A bidirectional motor 27 is fixedly mounted on the lower end of the fixed frame 23. The output ends of both ends of the bidirectional motor 27 are transmission-connected to the rotating shaft 24 through the sprocket assembly 28. The outer wall of the fixed frame 23 is fixedly provided with a protective cover shell 29 covering the outside of the bidirectional motor 27 and the sprocket assembly 28. The shaft wall of the rotating shaft 24 is fixedly sleeved with an outward-expanding circular plate 210. The outer wall of the fixed frame 23 is fixedly provided with a stable circular shell 211 slidably connected to the outward-expanding circular plate 210. A through hole for the extending rotating shaft 24 is opened at the center of the stable circular shell 211. A plurality of universal ball bearings 212 are equidistantly provided on one side of the outward-expanding circular plate 210 close to the fixed frame 23.

[0020] The pouring guiding mechanism 3 is fixedly mounted on the automatic pouring mechanism 2 and is used for guiding the poured molten iron. The pouring guiding mechanism 3 comprises a mounting shell 31 fixedly mounted on the upper end of the fixed frame 23. A plurality of positioning slide bars 32 are symmetrically fixedly connected to the inner wall of the mounting shell 31. The plurality of positioning slide bars 32 are externally slidably sleeved with the same mounting plate 33. A pressure sensing plate 34 arranged opposite to the mounting plate 33 is fixedly mounted on the top of the inner wall of the mounting shell 31. Two L-shaped extension rods 35 are symmetrically fixedly connected to the front side of the mounting plate 33. The lower ends of the two L-shaped extension rods 35 are fixedly connected to the same guiding funnel 36.

[0021] The pouring height regulating mechanism 4 is fixedly installed between the base 1 and the automatic pouring mechanism 2 for regulating the pouring height. The pouring height regulating mechanism 4 includes two magnetic vertical rods 41 fixedly installed at the upper end of the base 1 front and back. The upper end of the magnetic vertical rod 41 is fixedly connected with an anti - detachment plate 42. The same electromagnetic sliding seat 43 is slidably sleeved outside the two magnetic vertical rods 41. The side wall of the electromagnetic sliding seat 43 is fixedly connected with a regulating shell 44. The inner wall of the regulating shell 44 is rotatably connected with a vertically arranged synchronous screw rod 45. The upper end of the regulating shell 44 is fixedly installed with a synchronous motor 46 for driving the synchronous screw rod 45 to rotate self - sufficiently. The rod wall of the synchronous screw rod 45 is threadedly sleeved with a synchronous seat 47. One side of the upper end of the synchronous seat 47 is fixedly connected with a U - shaped synchronous rod 48. One end of the synchronous rod 48 penetrates through the upper end of the regulating shell 44 and is fixedly connected with a position switch 49. One side of the fixed frame 23 is fixedly connected with a connecting rod 410. The end of the connecting rod 410 far from the fixed frame 23 penetrates through the side wall of the U - shaped support plate 21 through a strip - shaped opening opened on the side wall of the U - shaped support plate 21. The end of the connecting rod 410 far from the fixed frame 23 is also fixedly connected with a connecting electromagnetic plate 411 magnetically connected with the regulating shell 44. The outer wall of the regulating shell 44 is made of magnetic metal material. The outer wall of the synchronous seat 47 is fixedly connected with a limiting slider. The inner wall of the regulating shell 44 is provided with a limiting sliding groove matched with the limiting slider for sliding connection.

[0022] The pouring speed control mechanism 5 is fixedly installed on the pouring height regulating mechanism 4 and is in transmission connection with the pouring height regulating mechanism 4 for controlling the pouring speed of the automatic pouring mechanism 2. The pouring speed control mechanism 5 includes a rotary potentiometer 51 fixedly installed on one side of the lower end of the regulating shell 44. The lower end of the regulating shell 44 is also fixedly installed with a reduction gearbox 52. The lower end of the synchronous screw rod 45 penetrates through the lower end of the regulating shell 44 and is fixedly connected with the input end of the reduction gearbox 52. The output end of the reduction gearbox 52 is fixedly connected with a linkage shaft 53. One end of the linkage shaft 53 far from the reduction gearbox 52 is fixedly connected with the center of the rotating end of the rotary potentiometer 51.

[0023] The infrared positioning mechanism 6 is fixedly installed on the front side of the automatic pouring mechanism 2 and is correspondingly arranged at the position of the lower discharge port of the pouring guiding mechanism 3. The infrared positioning mechanism 6 includes two side plates 61 symmetrically and fixedly connected to the front end of the protective cover shell 29. An infrared emitter 62 and an infrared receiver 63 arranged oppositely are respectively installed on the two side plates 61. Both the infrared emitter 62 and the infrared receiver 63 are high - temperature infrared sensors, and are stably used in cooperation with the light - shielding covers arranged at the ends.

[0024] The operating principle of the present invention is described as follows: The mold to be cast is transferred to the casting station by a conveyor 7. The conveyor 7 here is a high-temperature-resistant transfer device in the prior art, which realizes precise transfer in cooperation with intelligent control. This is prior art and will not be elaborated here. It is ensured that the gate on the mold is located directly below the guiding funnel 36. Before pouring the first mold, the PLC controller first controls the hydraulic push rod 22 to act, causing the hydraulic push rod 22 to drive the automatic pouring mechanism 2 and the pouring guiding mechanism 3 to move downward. At this time, the PLC controller controls the infrared positioning mechanism 6 to start. In this process, the PLC controller first controls the power supply device to supply power to the connecting electromagnetic plate 411, causing the connecting electromagnetic plate 411 to be energized to generate magnetism, making the connecting electromagnetic plate 411 magnetically connected and fixed to the regulating shell 44. Consequently, the connecting rod 410 is connected to the regulating shell 44, such that when the hydraulic push rod 22 drives the automatic pouring mechanism 2 to move downward, it can drive the regulating shell 44 to move downward synchronously; The infrared emitter 62 emits infrared laser to the infrared receiver 63. When the infrared laser between the infrared emitter 62 and the infrared receiver 63 moves to the top of the gate at the upper end of the mold, it indicates that the lower discharge port of the guiding funnel 36 and the top of the mold gate are in a relatively flush state. At this time, the infrared positioning mechanism 6 feeds back a signal to the PLC controller. The PLC controller first controls the power supply device to supply power to the electromagnet inside the electromagnetic sliding seat 43, causing the contact position between the electromagnetic sliding seat 43 and the magnetic vertical rod 41 to be energized to generate magnetism. Consequently, the electromagnetic sliding seat 43 is fixedly connected to the magnetic vertical rod 41 relatively. At the same time, the PLC controller controls the power supply device to cut off the power supply to the connecting electromagnetic plate 411, such that the connecting rod 410 no longer drives the regulating shell 44 to move downward. As the hydraulic push rod 22 continues to push the guiding funnel 36 downward, the PLC controller synchronously controls the synchronous motor 46 to act. The synchronous motor 46 drives the synchronous screw 45 to rotate self - sufficiently. Through the threaded socket connection of the synchronous screw 45 and the synchronous seat 47, the synchronous seat 47 cooperates with the synchronous rod 48 to drive the limit switch 49 to move upward relatively. Since the lower end of the guiding funnel 36 is a tapered structure, when the bottom end of the guiding funnel 36 completely abuts against the gate of the mold, at this time, the guiding funnel 36 cooperates with the L - shaped extension rod 35 to drive the mounting plate 33 to move upward relative to the mounting shell 31. Consequently, the mounting plate 33 abuts against the pressure sensing plate 34. When the pressure sensing plate 34 senses the pressure signal, it feeds back a signal to the PLC controller. The PLC controller first controls the hydraulic push rod 22 to stop acting and synchronously controls the synchronous motor 46 to stop acting, and limits and locks the final position of the limit switch 49. Specifically, when the size of the gate of the mold is larger, the guiding funnel 36 needs to be in contact with the gate on the outer wall of the upper side (larger diameter). Consequently, the height distance that the hydraulic push rod 22 needs to push the guiding funnel 36 to move downward is higher, and the interval time for the pressure sensing plate 34 to sense the pressure signal is longer. Consequently, the distance that the limit switch 49 moves upward is larger; And after the pressure sensing plate 34 senses a pressure signal, the PLC controller controls the hydraulic push rod 22 to drive the automatic pouring mechanism 2 and the pouring guiding mechanism 3 to move upward until the connecting rod 410 presses on the in-place switch 49. The PLC controller then controls the hydraulic push rod 22 to stop operating, completing the determination of the pouring height. Specifically, when the size of the gate is larger, the upward movement distance of the in-place switch 49 is greater, which in turn makes the height of the final determined position of the guiding funnel 36 higher, and the pouring height of the guiding funnel 36 from the mold gate is higher; When the synchronous motor 46 drives the synchronous screw 45 to rotate, the synchronous screw 45 cooperates with the reduction gearbox 52 and the linkage shaft 53 to drive the rotary adjustment end of the rotary potentiometer 51 to rotate synchronously. The rotary potentiometer 51 is connected in series in the power supply circuit of the bidirectional motor 27, and the bidirectional motor 27 is a DC motor. The rotary potentiometer 51 is essentially a variable resistor. When the sliding contact of the rotary potentiometer 51 is rotated through the rotary adjustment end, the resistance value of the rotary potentiometer 51 connected to the circuit changes. According to the voltage division principle of the series circuit, the change in the resistance value will cause the voltage across the bidirectional motor 27 to change. When the resistance value of the rotary potentiometer 51 increases, the voltage across the bidirectional motor 27 decreases; when the resistance value decreases, the voltage across the bidirectional motor 27 increases. For a DC motor, according to the basic principle of the motor, the speed of the motor is directly proportional to the voltage applied across it. Therefore, by adjusting the voltage across the bidirectional motor 27 with the rotary potentiometer 51, the speed of the bidirectional motor 27 can be controlled, that is, when the voltage increases, the motor speed increases; when the voltage decreases, the motor speed decreases. For this application, when the size of the mold gate is larger and the upward movement distance of the in-place switch 49 is greater, it means that the number of revolutions of the synchronous screw 45 is more, which in turn drives the rotary angle of the rotary potentiometer 51 to be larger, making the resistance value of the rotary potentiometer 51 connected to the circuit smaller, increasing the speed of the bidirectional motor 27 in subsequent use, and thus increasing the pouring speed. Conversely, when the size of the mold gate is smaller, the number of revolutions of the synchronous screw 45 is less, the resistance value of the rotary potentiometer 51 connected to the circuit is relatively larger, and the operating speed of the bidirectional motor 27 is relatively smaller, reducing the pouring speed; When the pouring height and pouring speed are determined and the specific pouring work is carried out, the bidirectional motor 27 cooperates with the sprocket assembly 28 to drive the two rotating shafts 24 to rotate synchronously. Then, the clamping frame 25 drives the iron bucket 26 to tilt, pouring out the molten iron in the iron bucket 26. The final tilt angle here is preset based on the size of the iron bucket 26, the molten iron storage capacity, and the amount of molten iron required by the mold. This technology is prior art and will not be elaborated here. The molten iron is accurately injected into the mold gate through the guiding funnel 36. By providing a rotational tilting force to the iron bucket 26 through the clamping frame 25, the weight of the iron bucket 26 and the internal molten iron can be more evenly distributed to the support structure through the rotating shafts 24, avoiding single-point or excessive local stress, thereby reducing the shaking and deviation of the iron bucket 26 during rotation due to uneven force, and improving the stability of molten iron pouring. The settings of the outer expansion circular plate 210 and the stable circular shell 211 further reinforce the installation structure of the rotating shafts 24, avoiding the problem that the rotating shafts 24 are prone to deformation and shaking under excessive force, which in turn affects the stability of molten iron pouring.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A casting device for a ductile iron crankshaft for an air compressor, comprising a base (1), characterized in that: Also includes: A conveyor (7) is fixedly mounted on the front side of the upper end of the base (1) and is used to transfer the mold to be cast; An automatic pouring mechanism (2) is fixedly mounted on the rear side of the upper end of the base (1); A pouring guide mechanism (3) is fixedly mounted on the automatic pouring mechanism (2) and is used to guide the poured molten iron; A pouring height regulating mechanism (4) is fixedly mounted between the base (1) and the automatic pouring mechanism (2) and is used to regulate the pouring height; A pouring speed control mechanism (5) is fixedly mounted on the pouring height control mechanism (4) and is transmission-connected to the pouring height control mechanism (4) and is used to control the pouring speed of the automatic pouring mechanism (2); The infrared positioning mechanism (6) is fixedly mounted on the front side of the automatic pouring mechanism (2) and is arranged corresponding to the position of the lower end discharge port of the pouring guide mechanism (3).

2. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 1, characterized in that: The automatic pouring mechanism (2) comprises a U-shaped support plate (21) fixedly mounted on the rear side of the upper end of the base (1); two hydraulic push rods (22) are symmetrically fixedly sleeved on the upper end of the U-shaped support plate (21); the lower movable ends of the two hydraulic push rods (22) are fixedly connected to a same fixed frame (23); the side walls on opposite sides of the fixed frame (23) are rotatably connected to a clamping frame (25) via a rotating shaft (24); a same molten iron bucket (26) is fixedly mounted inside the two ends of the clamping frame (25); a bidirectional motor (27) is fixedly mounted on the lower end of the fixed frame (23); the output ends of both ends of the bidirectional motor (27) are transmission-connected to the rotating shaft (24) via a sprocket assembly (28); and a protective cover shell (29) covering the bidirectional motor (27) and the sprocket assembly (28) is fixedly mounted on the outer wall of the fixed frame (23).

3. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 2, characterized in that: The pouring guide mechanism (3) comprises a mounting shell (31) fixedly mounted on the upper end of the fixing frame (23); a plurality of positioning slide bars (32) are symmetrically fixedly connected to the inner wall of the mounting shell (31); the plurality of positioning slide bars (32) are slidably sleeved on the outside of a common mounting plate (33); a pressure sensing plate (34) arranged opposite to the mounting plate (33) is fixedly mounted on the top of the inner wall of the mounting shell (31); two L-shaped extension bars (35) are symmetrically fixedly connected to the front side of the mounting plate (33); and the lower ends of the two L-shaped extension bars (35) are fixedly connected to a common guide funnel (36).

4. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 2, characterized in that: The pouring height regulating mechanism (4) comprises two magnetic uprights (41) fixedly mounted on the upper end of the base (1) in a front-to-rear manner, the upper ends of the magnetic uprights (41) being fixedly connected to an anti-slip plate (42), the two magnetic uprights (41) being slidably sleeved with a same electromagnetic sliding seat (43) on the outside, the side wall of the electromagnetic sliding seat (43) being fixedly connected to a regulating shell (44), the inner wall of the regulating shell (44) being rotatably connected to a vertically arranged synchronous screw (45), the upper end of the regulating shell (44) being fixedly mounted with a synchronous motor (46) for driving the synchronous screw (45) to rotate, the rod wall of the synchronous screw (45) being threadedly sleeved with a synchronous seat (47), A U-shaped synchronization rod (48) is fixedly connected to one side of the upper end of the synchronization seat (47); one end of the synchronization rod (48) passes through the upper end of the control shell (44) and is fixedly connected to an in-position switch (49); a connecting rod (410) is fixedly connected to one side of the fixed frame (23); an end of the connecting rod (410) away from the fixed frame (23) passes through the side wall of the U-shaped support plate (21) through a strip opening provided in the side wall of the U-shaped support plate (21); an end of the connecting rod (410) away from the fixed frame (23) is also fixedly connected to a connecting electromagnetic plate (411) magnetically connected to the control shell (44); and an outer wall of the control shell (44) is made of a magnetic metal material.

5. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 4, characterized in that: The pouring speed control mechanism (5) comprises a knob potentiometer (51) fixedly mounted on one side of the lower end of the regulating housing (44); a reduction gear box (52) is also fixedly mounted on the lower end of the regulating housing (44); the lower end of the synchronous screw (45) passes through the lower end of the regulating housing (44) and is fixedly connected to the input end of the reduction gear box (52); the output end of the reduction gear box (52) is fixedly connected to a linkage shaft (53); and one end of the linkage shaft (53) away from the reduction gear box (52) is fixedly connected to the center of the rotating end of the knob potentiometer (51).

6. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 2, characterized in that: The infrared positioning mechanism (6) comprises two side panels (61) symmetrically fixedly connected to the front end of the protective cover shell (29), and the two side panels (61) are respectively provided with infrared transmitters (62) and infrared receivers (63) arranged opposite to each other.

7. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 2, characterized in that: An outwardly expanding circular plate (210) is fixedly sleeved on the shaft wall of the rotating shaft (24); a stable circular shell (211) slidably connected to the outwardly expanding circular plate (210) is fixedly mounted on the outer wall of the fixed frame (23); a through hole for the rotating shaft (24) to extend out is provided at the center of the stable circular shell (211); and a plurality of universal balls (212) are equidistantly mounted on one side of the outwardly expanding circular plate (210) close to the fixed frame (23).

8. The casting and pouring device for a ductile iron crankshaft for an air compressor according to claim 4, characterized in that: The outer wall of the synchronous seat (47) is fixedly connected to a limit slider, and the inner wall of the regulating shell (44) is provided with a limit sliding groove that matches and slides with the limit slider.

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