An automatic sand scraping robot for the surface of a sand box used in a molding machine

Abstract

The present invention relates to the technical field of sand box sand treatment, and particularly relates to an automatic sand scraping robot for the surface of a sand box used in a molding machine, which includes a multi-axis robot. A substrate is fixedly installed at the end of the output shaft of the multi-axis robot. A small manipulator is installed on the front surface of the substrate. A high-pressure nozzle is fixedly installed at the end of the output shaft of the small manipulator. An air pump, a bag filter, an air inlet pipe and an air outlet pipe are installed on the back surface of the substrate. An air vent passage is installed on the substrate. A hose is fixedly installed between the air vent passage and the input end of the high-pressure nozzle. One end of the air inlet pipe is fixedly connected to the output end of the air pump through a pipe, and the other end of the air inlet pipe is communicated with the air vent passage. When the front surface of the substrate is attached to the sand box to form a seal, a cleaning chamber is formed in the space between the substrate and the sand box. One end of the air outlet pipe is communicated with the cleaning chamber, and the other end of the air outlet pipe is fixedly connected to the input end of the bag filter through a pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of sand box molding sand treatment, and particularly relates to an automatic sand scraping robot for the surface of a sand box used in a molding machine. Background Art

[0002] A sand box of a molding machine is a casting device used for manufacturing sand molds. Its main functions are: filling sand, filling loose molding sand into the sand box; compacting the molding sand, making the loose molding sand in the sand box compact through different methods such as vibration compaction, pressure compaction, vibration-pressure compaction, and injection pressure compaction, so that the sand mold has the necessary strength during processes such as handling and pouring; and mold removal, using different mechanisms to take out the pattern from the compacted sand mold. The cleaning of the inner wall of the sand box of a static pressure molding machine is an important link and also one of the difficulties in the sand mold production process. It is particularly important and difficult to clean a sand box with a thin wall and a reticulated reinforcing rib plate. During the compaction, pouring, and mold stripping processes in the molding process, sand spots and sand blocks will remain on the inner wall of the sand box and the side surface of the rib plate. If not cleaned thoroughly, the sand spots and sand blocks will gradually accumulate and harden, directly leading to molding failure and mold collapse.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure, and thus it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present invention is to design a machine that can remove the molding sand adhered to the inner wall of the sand box and collect the removed molding sand to solve the above deficiencies in the technology.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic sand scraping robot for the surface of a sand box used in a molding machine, used for removing the molding sand adhered to the inner surface of the sand box, including a multi-axis robot. A substrate is fixedly installed at the end of the output shaft of the multi-axis robot. A small manipulator is installed on the front surface of the substrate. A high-pressure nozzle is fixedly installed at the end of the output shaft of the small manipulator. An air pump, a bag filter, an air inlet pipe, and an air outlet pipe are installed on the back surface of the substrate. An air ventilation channel is installed on the substrate. A hose is fixedly installed between the air ventilation channel and the input end of the high-pressure nozzle. One end of the air inlet pipe is fixedly connected to the output end of the air pump through a pipe, and the other end of the air inlet pipe is communicated with the air ventilation channel. When the front surface of the substrate is attached to the sand box to form a seal, the space between the substrate and the sand box forms a cleaning chamber. One end of the air outlet pipe is communicated with the cleaning chamber, and the other end of the air outlet pipe is fixedly connected to the input end of the bag filter through a pipe;

[0006] High-pressure gas is injected into the high-pressure nozzle through an air pump and ejected to impact and clean the molding sand adhering to the inner surface of the sand box, forming a high-pressure cleaning chamber that automatically discharges the gas through the outlet pipe into the low-pressure bag dust collector, thereby automatically discharging the cleaned molding sand into the sand box for collection.

[0007] Preferably, the ventilation duct includes a first duct and a second duct opened on one side of the substrate, and a flexible airbag tube connected between the first duct and the second duct. The flexible airbag tube is also fixedly installed on the front side of the substrate. When the flexible airbag tube is filled with high-pressure gas, the surface of the flexible airbag tube contacts the inner wall of the sand box to generate pressure. The first duct is connected to the air inlet pipe, and the second duct is connected to the hose.

[0008] Preferably, the cross section of the flexible airbag tube is Ω-shaped, and the connection between the flexible airbag tube and the substrate is closer to the central axis of the flexible airbag tube in the horizontal direction than the connection between the flexible airbag tube and the surface of the flask.

[0009] Preferably, the cross-sectional area of the flexible airbag tube is 1-3 times the cross-sectional area of the ventilation pipe.

[0010] Preferably, the cross-sectional shape of the flexible airbag tube is set to be annular and wavy. When the flexible airbag tube is not filled with high-pressure gas, it is in a contracted state. When the flexible airbag tube is filled with high-pressure gas, it expands into an Ω shape.

[0011] Preferably, the flexible airbag tube is a rubber component. When the flexible airbag tube is in a contracted state, there is a distance between the surface of the flexible airbag tube and the inner surface of the sand box.

[0012] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0013] The front of the substrate is moved to fit the sand box by a multi-axis robot, and then the air pump and small robotic arm are started. The small robotic arm drives the high-pressure nozzle to spray high-pressure airflow to various places on the inner surface of the sand box, spraying off the molding sand adhering to the inner surface of the sand box. Finally, the cleaned molding sand is introduced into the bag dust collector for recycling and treatment. This solves the technical problem in the existing technology that if the cleaning is not thorough, sand spots and sand blocks will gradually accumulate and harden, which will directly lead to molding failure and box collapse.

[0014] When the air pump is working, it not only increases the high-pressure gas to the high-pressure nozzle, but also causes the flexible air bag tube to expand from a contracted state into an Ω shape, tightly attached to the inner wall of the sand box, thereby forming a seal in the cleaning chamber. This creates an air pressure difference between the cleaning chamber and the bag dust collector, thereby automatically directing the molding sand cleaned by the high-pressure nozzle into the bag dust collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Schematic diagram of the contact between the flexible airbag tube of the present invention and the inner wall of the sand box;

[0018] Figure 3 Schematic diagram of the contracted state of the flexible airbag tube of the present invention;

[0019] Figure 4 Schematic diagram of the expanded state of the flexible airbag tube of the present invention;

[0020] Figure 5 Front view of the contact between the flexible airbag tube of the present invention and the inner wall of the sand box;

[0021] Figure 6 Cross-sectional view of the flexible airbag tube of the present invention.

[0022] Explanation of reference numerals:

[0023] 1. Multi-axis robot; 2. Substrate; 3. Small manipulator; 4. High-pressure nozzle; 5. Air pump; 6. Bag filter; 7. Intake pipe; 8. Exhaust pipe; 9. Ventilation channel; 9a. First pipe; 9b. Second pipe; 9c. Flexible airbag tube; 10. Hose; 11. Cleaning chamber. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0025] To better understand the above technical solutions, the following will combine the specification drawings and specific implementation manners to elaborate on the above technical solutions in detail.

[0026] The present invention provides as Figure 1-6An automatic sand scraping robot for the surface of a sand box used in a molding machine, as shown, includes a multi-axis robot 1. A substrate 2 is fixedly installed at the end of the output shaft of the multi-axis robot 1. A small robotic arm 3 and a flexible airbag tube 9c are installed on the front of the substrate 2. A high-pressure nozzle 4 is fixedly installed at the end of the output shaft of the small robotic arm 3. An air pump 5, a bag filter 6, an air inlet pipe 7 and an air outlet pipe 8 are installed on the back of the substrate 2. A first pipe 9a is opened on one side inside the substrate 2, and a second pipe 9b is opened on the other side. Both the first pipe 9a and the second pipe 9b are communicated with the flexible airbag tube 9c. A hose 10 is fixedly installed between the second pipe 9b and the input end of the high-pressure nozzle 4. One end of the air inlet pipe 7 is fixedly connected to the output end of the air pump 5 through a pipe, and the other end of the air inlet pipe 7 is communicated with the first pipe 9a, as shown in the accompanying drawings of the specification Figure 3 As shown, when there is no high-pressure gas inside the flexible airbag tube 9c, the cross-section is in a circular wavy shape, as shown in the accompanying drawings of the specification Figure 4 As shown, when there is high-pressure gas inside the flexible airbag tube 9c, the cross-section is in a Ω shape. When the front of the substrate 2 is attached to the sand box to form a seal, the space between the substrate 2 and the sand box forms a cleaning chamber 11. One end of the air outlet pipe 8 is communicated with the cleaning chamber 11, and the other end of the air outlet pipe 8 is fixedly connected to the input end of the bag filter 6 through a pipe;

[0027] After the casting machine removes the molding sand from the sand box and takes out the mold, the multi-axis robot 1 moves the substrate 2 to the bottom of the upper sand box, makes the front of the substrate 2 face the upper sand box, and then moves the substrate 2 upward so that the front of the substrate 2 is attached to the bottom surface of the sand box. At this time, the space between the substrate 2 and the sand box forms a cleaning chamber 11. Then, the air pump 5 is started to inject high-pressure gas into the air inlet pipe 7. The high-pressure gas sequentially enters the first pipe 9a, the flexible airbag tube 9c, the second pipe 9b and the hose 10 through the air inlet pipe 7, and finally sprays out through the high-pressure nozzle 4. When the high-pressure gas fills the flexible airbag tube 9c, the flexible airbag tube 9c expands from the original contracted state into a Ω shape. At this time, the flexible airbag tube 9c will come into contact with the inner surface of the sand box and deform, generating pressure on the inner surface of the sand box, thereby forming extrusion to seal the cleaning chamber 11;

[0028] Then, the small robotic arm 3 operates the high-pressure nozzle 4 to move, so that the high-pressure gas sprayed out by the high-pressure nozzle 4 washes and blows down the molding sand adhered to the inner surface of the sand box. Since a high-pressure environment is formed in the cleaning chamber 11 and the air outlet pipe 8 is communicated with the low-pressure bag filter 6, the high-pressure gas in the cleaning chamber 11 will enter the bag filter 6 through the air outlet pipe 8. An air flow will be formed during the movement of the high-pressure gas from the high-pressure area to the low-pressure area, thereby driving the molding sand blown down by the high-pressure nozzle 4 into the bag filter 6 for filtration;

[0029] After blowing the molding sand everywhere in the sand box once with the high-pressure nozzle 4, continue to make the high-pressure nozzle 4 work for a predetermined time length, fully collect the washed-down molding sand into the bag filter 6, then the air pump 5 stops working, and the flexible airbag tube 9c gradually returns to the contracted state, with a spacing between it and the inner surface of the sand box. Then, the multi-axis robot 1 can process the lower sand box with the substrate 2 according to the above steps.

[0030] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible (for example, changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. An automatic sand scraping robot for the surface of a sand box used in a molding machine, which is used to remove the molding sand adhered to the inner surface of the sand box, and is characterized in that: It includes a multi-axis robot (1). A substrate (2) is fixedly installed at the end of the output shaft of the multi-axis robot (1). A small robotic arm (3) is installed on the front of the substrate (2). A high-pressure nozzle (4) is fixedly installed at the end of the output shaft of the small robotic arm (3). An air pump (5), a bag filter (6), an air inlet pipe (7) and an air outlet pipe (8) are installed on the back of the substrate (2). An air ventilation channel is installed on the substrate (2). A hose (10) is fixedly installed between the air ventilation pipe (9) and the input end of the high-pressure nozzle (4). One end of the air inlet pipe (7) is fixedly connected to the output end of the air pump (5) through a pipe, and the other end of the air inlet pipe (7) communicates with the air ventilation channel. When the front of the substrate (2) is in contact with the sand box to form a seal, the space between the substrate (2) and the sand box forms a cleaning chamber (11). One end of the air outlet pipe (8) communicates with the cleaning chamber (11), and the other end of the air outlet pipe (8) is fixedly connected to the input end of the bag filter (6) through a pipe; The air pump (5) injects high-pressure gas into the high-pressure nozzle (4) for spraying, so as to impact and clean the molding sand adhering to the inner surface of the sand box. The high-pressure cleaning chamber (11) automatically discharges the gas into the low-pressure bag filter (6) through the air outlet pipe (8), so as to automatically discharge the cleaned molding sand out of the sand box for collection; The air ventilation pipe (9) includes a first pipe (9a) and a second pipe (9b) opened on one side inside the substrate (2), and a flexible airbag pipe (9c) communicating between the first pipe (9a) and the second pipe (9b). The flexible airbag pipe (9c) is also fixedly installed on the front of the substrate (2). When the flexible airbag pipe (9c) is filled with high-pressure gas, the surface of the flexible airbag pipe (9c) contacts the inner wall of the sand box to generate pressure. The first pipe (9a) communicates with the air inlet pipe (7), and the second pipe (9b) communicates with the hose (10).

2. The automatic sand scraping robot for the surface of the sand box of a molding machine according to claim 1, characterized in that: The cross-section of the flexible airbag pipe (9c) is Ω-shaped. At the connection of the flexible airbag pipe (9c) and the substrate (2), it is closer to the central axis of the flexible airbag pipe (9c) in the horizontal direction than the contact position of the flexible airbag pipe (9c) with the surface of the sand box.

3. The automatic sand scraping robot for the surface of the sand box of a molding machine according to claim 2, characterized in that: The cross-sectional area of the flexible airbag pipe (9c) is 1-3 times that of the cross-sectional area of the air ventilation pipe (9).

4. The surface automatic sand scraping robot for a sand box of a molding machine according to claim 2, characterized in that: The cross-sectional shape of the flexible airbag pipe (9c) is set to be a ring-shaped wave shape. When the flexible airbag pipe (9c) is not filled with high-pressure gas, it is in a contracted state. When the flexible airbag pipe (9c) is filled with high-pressure gas, it expands into an Ω shape.

5. The surface automatic sand scraping robot for a flask used in a molding machine according to claim 4, wherein: When the flexible airbag pipe (9c) is in a contracted state, there is a distance between the surface of the flexible airbag pipe (9c) and the inner surface of the sand box.

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