Straight pouring gate cleaning device of sand suction and injection mold

Abstract

A sprue cleaning device of a suction-injection sand mold comprises a sand core placing table, a lifting air cylinder installed on the lower middle portion in the sand core placing table, an air cylinder lifting electromagnetic valve connected with the side face of the lifting air cylinder and fixed to the sand core placing table, a cap type air blowing cylinder vertically connected with the lifting air cylinder and an electric cabinet. Wherein the upper part of the cap type blowing cylinder is connected with the middle part in a sand core sprue which is arranged on the top surface of the sand core placing table and is used for sucking and injecting a sand core; the lower part of the cap type air blowing cylinder is connected with a throttle valve, and the throttle valve is connected with a time relay and is connected with an air blowing control electromagnetic valve fixed in the sand core placing table; a cylinder upper limit switch and a cylinder lower limit switch are mounted on one side of the lifting cylinder; a photoelectric detection switch is mounted on one side of the upper part of the sand core placing table. According to the sand suction and injection mold sprue cleaning device, burnt-on sand, dust, coating ash and the like on the inner wall of the sand suction and injection mold sprue can be cleaned in an automatic mode, the cleanliness of the sand suction and injection mold sprue cleaning device is guaranteed, and the technical problems of sand inclusion, slag inclusion and other bad defects of castings are solved.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical casting, in particular to a sprue cleaning device for a suction sand mold. Background Art

[0002] As a new pouring method, suction pouring is increasingly used in industrial production due to its high degree of automation, efficiency, high casting retention rate, and low slag inclusion rate.

[0003] The finished sand core structure used in the suction injection process is different from the traditional gravity casting sand core. Since the molten steel enters the sand core directly from the bottom to the top of the furnace, the sprue is located below the water inlet, and the gate of the sand core is also located below the sand core.

[0004] In the production process, since the sand core has to go through the operation procedures of core making, repairing, spraying, baking, assembly, gluing, mold closing, bolting, transportation, etc., it is inevitable that some impurities such as sand, paint ash, and dust will be stuck in the sprue of the sand core; if these impurities are not cleaned before suction injection, they may form defects such as sand inclusion and slag inclusion, which can easily lead to the defective rate of castings. Therefore, before suction injection, the operator will manually clean the sprue, which is not only time-consuming and labor-intensive, but also inefficient, and the cleaning effect is not ideal. In order to ensure the cleanliness of the sprue of the suction injection sand mold and eliminate the adverse hidden dangers caused by it, it is urgent to develop a sprue cleaning device for suction injection sand mold. Utility Model Content

[0005] The utility model aims to provide a sprue cleaning device for a suction sand injection mold to solve the technical problem of cleanliness in the sprue of the suction sand injection mold.

[0006] In order to achieve the above-mentioned purpose, the specific technical scheme of the sprue cleaning device of the suction injection sand mold of the utility model is as follows:

[0007] A device for cleaning a sprue of a suction sand mold comprises: a sand core placement table, a lifting cylinder installed in the middle and lower part of the sand core placement table, a cylinder lifting solenoid valve connected to the side of the lifting cylinder and fixed on the sand core placement table, a cap-type air blower and an electric control box vertically connected to the lifting cylinder; wherein, the cap-type air blower passes through the top plate of the sand core placement table in the vertical direction above and is connected to the middle part of the sprue of the sand core for suction sand cores installed on the top surface of the sand core placement table; the cap-type air blower is connected to a throttle valve at the bottom, the throttle valve is connected to a time relay, is installed on the time relay, and is connected to a blowing control solenoid valve fixed on the second layer of the sand core placement table; a cylinder upper limit switch and a cylinder lower limit switch are installed on one side of the lifting cylinder; a photoelectric detection switch is installed on one side of the upper part of the sand core placement table, which can detect whether the suction sand core is placed on the sand core placement table.

[0008] Furthermore, the cylinder lifting solenoid valve is connected to the upper and lower air holes on the side of the lifting cylinder through an air pipe and fixed on the second layer inside the sand core placement table; and the lifting of the lifting cylinder is achieved through the action of the cylinder lifting solenoid valve.

[0009] Furthermore, the lifting cylinder is installed in the middle of the second layer of the sand core placement platform.

[0010] Furthermore, the electric control box is equipped with a power line, a relay line, and a signal line for controlling a sprue cleaning device for the suction and injection sand mold.

[0011] Furthermore, the sand core placement table is a vertical rectangular structure, the four sides of which are several layers of box structures connected by metal, and the lower part is divided into several layers by steel structure beams and plates, including: a top plate and a partition layer plate and matching steel structure cross beams and vertical beams, which are fixed to the ground by steel structure cross beams and vertical beams and steel plates, iron plates or stainless steel plates.

[0012] Furthermore, the sand core placing platform is provided with a positioning button for the suction and injection sand core fixed by bolts, which can position the sand core placing platform and the suction and injection sand core. A circular hole is opened in the upper center of the sand core placing platform, and its size is larger than that of the suction and injection sand core straight runner, so that cleaning can enter the suction and injection sand core straight runner through this hole.

[0013] Furthermore, the photoelectric detection switch is fixed to the side of the sand core placement table by a small bracket, and the detection surface of the photoelectric detection switch faces the suction sand core, which can detect whether the suction sand core is placed on the sand core placement table.

[0014] Furthermore, the lifting cylinder is fixed on the crossbeam of the steel structure of the sand core placement platform, and its position is adjusted so that the central axis of the cylinder rod is coaxial with the straight runner of the suction and injection sand core. The head of the cylinder rod is provided with a cap-type air blow cylinder fixed with threads so that the movement of the cylinder rod can drive the cap-type air blow cylinder to achieve lifting movement.

[0015] Furthermore, one end of the throttle valve is threadedly connected to the opening at the lower end of the cap-type air blow tube, and the other end is connected to the air blowing control solenoid valve through an air pipe to provide an air source, and the air blowing action of the cap-type air blow tube is controlled by the air blowing control solenoid valve; the action of the air blowing control solenoid valve, and a time relay are connected in series in the circuit to realize the control of the air blowing cleaning time.

[0016] The sprue cleaning device of the suction sand mold of the utility model has the following advantages:

[0017] It not only overcomes the difficulties caused by manual cleaning of the suction injection mold sprue, but can also automatically clean the sticky sand, dust, paint ash, etc. on the inner wall of the suction injection sand mold sprue. Moreover, it ensures the cleanliness of the suction injection sand mold sprue and reduces technical problems such as sand inclusion and slag inclusion in castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0020] Description of the markings in the figure:

[0021] 1. Cylinder lifting solenoid valve, 2. Lifting cylinder, 3. Cap-type air blower, 4. Sand core placement table, 5. Suction and injection sand core, 6. Sand core straight runner, 7. Photoelectric detection switch, 8. Throttle valve, 9. Cylinder upper limit switch, 10. Cylinder lower limit switch, 11. Time relay, 12. Blowing control solenoid valve. DETAILED DESCRIPTION

[0022] In order to better understand the purpose, structure and function of the utility model, the sprue cleaning device of the suction injection sand mold of the utility model is further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 , Figure 2 As shown, the utility model includes: a sand core placement platform 4, a lifting cylinder 2 installed in the middle and lower part of the sand core placement platform 4, connected to the side of the lifting cylinder 2 by bolts or screws, and fixed to the second layer of the sand core placement platform 4 by bolts or screws, a cap-type air blower 3 and an electric control box vertically connected to the lifting cylinder 2; wherein, the cap-type air blower 3 vertically passes through the top plate of the sand core placement platform 4 and is installed on the top surface of the sand core placement platform 4. The middle part of the sand core straight runner 6 for sucking and injecting the sand core 5 is connected by bolts or screws; the bottom of the cap-type air blower 3 is connected to the throttle valve 8 by bolts or screws. The throttle valve 8 is connected with the time relay 11 by bolts or screws, and is installed on the time relay 11 by bolts or screws, and is fixed to the blowing control solenoid valve 12 on the second layer inside the sand core placement table 4 by bolts or screws; the cylinder upper limit switch 9 and the cylinder lower limit switch 10 are installed on one side of the lifting cylinder 2 by bolts or screws; the photoelectric detection switch 7 is installed on one side of the upper part of the sand core placement table 4 by bolts or screws, which can detect whether the suction sand core 5 is installed on the sand core placement table 4.

[0024] The cylinder lifting solenoid valve 1 is connected to the upper and lower air holes on the side of the lifting cylinder 2 through an air pipe by bolts or screws, and is fixed on the second inner layer of the sand core placement table 4; and the lifting and lowering of the lifting cylinder 2 is achieved through the action of the cylinder lifting solenoid valve.

[0025] The lifting cylinder 2 is installed in the middle of the second layer of the sand core placement platform 4 by bolt or screw connection.

[0026] The electric control box is equipped with power lines, relay lines, signal lines, etc. for controlling the sprue cleaning device for suction and injection sand mold.

[0027] The above-mentioned sand core placement table 4 is a vertical rectangular structure table, whose four sides are made of steel, iron or stainless steel, and are connected by welding or bolts or screws to form a multi-layer box structure. The lower part is divided into several layers by steel structure beams and plates (three layers in this embodiment, including: top plate and partition layer plate and matching steel structure cross beams and vertical beams), and is fixed to the ground by steel structure cross beams and vertical beams and steel plates, iron plates or stainless steel plates; the sand core placement table 4 is provided with a positioning button of the suction sand core 5 fixed by bolts, which can position the sand core placement table 4 and the suction sand core 5, and a circular hole is opened in the center of the upper part of the sand core placement table 4, the size of which is larger than the size of the suction sand core straight runner 6, so that cleaning can enter the suction sand core straight runner 6 through this hole.

[0028] The photoelectric detection switch 7 is fixed to the side of the sand core placement table 4 by a small bracket. The detection surface of the photoelectric detection switch 7 faces the suction sand core 5 and can detect whether the suction sand core 5 is placed on the sand core placement table 4.

[0029] The above-mentioned lifting cylinder 2 is fixed to the crossbeam of the steel structure of the sand core placement platform 4 by bolts or screws, and its position is adjusted so that the central axis of the cylinder rod is coaxial with the straight runner of the suction and injection sand core 5. The head of the cylinder rod is provided with a cap-type air blow cylinder 3 fixed with threads, so that the movement of the cylinder rod can drive the cap-type air blow cylinder 3 to achieve lifting movement; the upper and lower air holes of the lifting cylinder 2 are connected to the cylinder lifting solenoid valve 1 through an air pipe, and the lifting and lowering of the lifting cylinder 2 is realized by the action of the cylinder lifting solenoid valve 1.

[0030] One end of the throttle valve 8 is threadedly connected to the lower opening of the cap-type air blow cylinder 3, and the other end is connected to the air blowing control solenoid valve 12 through an air pipe to provide an air source, and the air blowing control solenoid valve 12 controls the blowing action of the cap-type air blow cylinder 3; the action of the air blowing control solenoid valve 12, and a time relay 11 are connected in series in the circuit to realize the control of the air blowing cleaning time.

[0031] The working principle of this utility model:

[0032] The power supply, relays, signal lines, etc. are concentrated in the electric control box, and a control switch is set. First, according to the height of the sand core sprue 6, by adjusting the position of the cylinder upper limit switch 9, set the height of the cap-type blower 3 driven by the lifting cylinder 2; and adjust the time knob of the time relay 11 to set the blowing cleaning time. Then, turn on the main electric control switch.

[0033] When the suction and injection sand core 5 is placed on the sand core placement table 4 by the robot, the photoelectric detection switch 7 detects that the suction and injection sand core 5 is placed, and then transmits a signal to the cylinder lifting solenoid valve 1 of the lifting cylinder 2, and the cylinder lifting solenoid valve 1 is actuated to control the lifting cylinder 2 to rise. When the lifting cylinder 2 rises to the cylinder upper limit switch 9, the cylinder upper limit switch 9 light is on. When the cylinder upper limit switch 9 light is on, the signal is transmitted to the blowing control solenoid valve 12, and the blowing control solenoid valve 12 is actuated. The compressed air enters the cap-type air blow cylinder 3 through the throttle valve 8, and a downward airflow is formed at the lower blowing hole on the top of the cap-type air blow cylinder 3, blowing the sticky sand, dust, paint ash, etc. in the suction and injection sand core straight runner 6 out of the suction and injection sand core 5. Then, when the set cleaning time is up, the time relay 11 closes the blowing control solenoid valve 12 and the blowing stops; then, the cylinder lifting solenoid valve 1 is actuated to control the lifting cylinder 2 to descend. When the lifting cylinder 2 descends to the cylinder lower limit switch 10, the cylinder lower limit switch 10 light is on. When the cylinder lower limit switch 10 light is on, the action cycle of the utility model is completed, the suction and injection sand core 5 is cleaned, and the robot can move it to the next process for production.

[0034] The above-mentioned photoelectric detection switch, solenoid valve, and time relay are prior art, and the technology not described is also prior art.

[0035] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A sprue cleaning device for suction sand mold, characterized in that: include: A sand core placement table, a lifting cylinder installed in the middle and lower part of the sand core placement table, a cylinder lifting solenoid valve connected to the side of the lifting cylinder and fixed on the sand core placement table, a cap-type air blower and an electric control box vertically connected to the lifting cylinder; wherein, the cap-type air blower passes through the top plate of the sand core placement table in the vertical direction above and is connected to the middle part of the sand core straight runner installed on the top surface of the sand core placement table for sucking and injecting sand cores; the bottom of the cap-type air blower is connected to the throttle valve, the throttle valve is connected to the time relay, and is installed on the time relay, and is connected to the blowing control solenoid valve fixed on the second layer of the sand core placement table; a cylinder upper limit switch and a cylinder lower limit switch are installed on one side of the lifting cylinder; a photoelectric detection switch is installed on one side of the upper part of the sand core placement table, which can detect whether the sucked sand core is placed on the sand core placement table.

2. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: The cylinder lifting solenoid valve is connected to the upper and lower air holes on the side of the lifting cylinder through an air pipe and fixed on the second layer inside the sand core placement table; and the lifting of the lifting cylinder is achieved through the action of the cylinder lifting solenoid valve.

3. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: The lifting cylinder is installed in the middle of the second layer of the sand core placing platform.

4. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: The electric control box is equipped with a power line, a relay line and a signal line for controlling a sprue cleaning device for the suction and injection sand mold.

5. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: The sand core placement table is a vertical rectangular structure table, whose four sides are several layers of box structure connected by metal, and the lower part is divided into several layers by steel structure beams and plates, including: top plate and partition layer plates and matching steel structure cross beams and vertical beams, which are fixed to the ground by steel structure cross beams and vertical beams and steel plates, iron plates or stainless steel plates.

6. The sprue cleaning device for suction injection sand mold according to claim 1 or 5, characterized in that: The sand core placement platform is provided with a positioning button for the suction and injection sand core fixed by bolts, which can position the sand core placement platform and the suction and injection sand core. A circular hole is opened in the upper center of the sand core placement platform, and its size is larger than that of the suction and injection sand core straight runner, so that cleaning can enter the suction and injection sand core straight runner through this hole.

7. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: The photoelectric detection switch is fixed to the side of the sand core placement table by a small bracket, and the detection surface of the photoelectric detection switch faces the suction and injection sand core, and can detect whether the suction and injection sand core is placed on the sand core placement table.

8. The sprue cleaning device for suction injection sand mold according to claim 1 or 3, characterized in that: The lifting cylinder is fixed on the crossbeam of the steel structure of the sand core placement platform, and its position is adjusted so that the central axis of the cylinder rod is coaxial with the straight runner of the suction and injection sand core. The head of the cylinder rod is provided with a cap-type air blow cylinder fixed with threads so that the movement of the cylinder rod can drive the cap-type air blow cylinder to achieve lifting movement.

9. The sprue cleaning device for suction injection sand mold according to claim 1, characterized in that: One end of the throttle valve is threadedly connected to the opening at the lower end of the cap-type air blower, and the other end is connected to the air blowing control solenoid valve through an air pipe to provide an air source, and the air blowing control solenoid valve controls the blowing action of the cap-type air blower; the action of the air blowing control solenoid valve, and a time relay is connected in series in the circuit to realize the control of the air blowing cleaning time.

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