A sand mould processing device for rapid prototyping of aluminium alloy castings

Abstract

The utility model discloses a kind of sand mould processing devices for aluminium alloy casting rapid prototyping in the technical field of aluminium alloy casting rapid prototyping, pipe is equipped with baffle, baffle separates into blowing gas cavity and power gas cavity, the upper end of pipe is equipped with air inlet pipe for conveying high-pressure gas to pipe, pipe is equipped with three-way valve for connecting air inlet pipe with blowing gas cavity and power gas cavity, the lower end of pipe is equipped with blowing pipe for being connected with blowing gas cavity respectively, and power gas cavity is connected with brush head, power gas cavity is equipped with driving element for driving connection with brush head, and high-pressure gas in power gas cavity is used to drive brush head rotation, power gas cavity cavity wall is provided with exhaust hole;The utility model is through the integration design of gas circuit distribution and execution end, realize one machine simultaneously with high-pressure purging and rotating brush double function of scraping, greatly improve the cleaning efficiency of complex sand mould inner cavity sand.

Description

Technical Field

[0001] This utility model relates to the field of rapid prototyping technology for aluminum alloy castings, and in particular to a sand mold processing device for rapid prototyping of aluminum alloy castings. Background Technology

[0002] In the rapid prototyping process of aluminum alloy castings, 3D printing technology is required to make sand molds and carry out subsequent processing. During the sand mold processing, a large amount of uncured loose sand is distributed on the surface and inside of the mold cavity. If this loose sand is not cleaned, it will be washed into the mold cavity when pouring high-temperature aluminum liquid, resulting in quality defects such as sand inclusion and surface roughness in the casting, which seriously affects the product qualification rate.

[0003] Currently, cleaning loose sand from sand molds mainly relies on operators using handheld air guns to blow it away. This method of cleaning loose sand is not only inefficient and has limited effectiveness when blowing away stubborn loose sand that is firmly attached, but also difficult for the air gun to penetrate into the complex structure of the sand mold cavity with deep holes or dead corners. It is also unable to clean the loose sand attached to the inner wall, easily leaving cleaning blind spots. Therefore, there is an urgent need for a sand mold processing device that can efficiently, thoroughly and environmentally clean the loose sand in the inner cavity of the sand mold. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a sand mold processing device for rapid prototyping of aluminum alloy castings. Through the integrated design of air distribution and execution end, this utility model realizes that one machine can simultaneously perform high-pressure blowing and rotary brush scraping functions, which greatly improves the cleaning efficiency of floating sand in the inner cavity of complex sand molds.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sand mold processing device for rapid prototyping of aluminum alloy castings, comprising: The pipe fitting has a hollow structure and a partition inside, which divides the inner cavity of the pipe fitting into an air blowing chamber and a power air chamber. The air inlet pipe, located at the upper end of the pipe fitting, is used to deliver high-pressure gas into the pipe fitting; A three-way valve is installed inside the pipe fitting, with its ends connected to the air inlet pipe, the blowing air chamber, and the power air chamber, respectively, for air distribution. The air blowing pipe is located at the lower end of the pipe fitting and is connected to the air blowing chamber. It is used to discharge high-pressure gas and blow away the floating sand on the surface of the sand mold. The brush head, located at the lower end of the pipe and connected to the power air chamber, is used to scrape off stubborn loose sand from the surface of the sand mold. The driving component is located in the power air chamber and is connected to the brush head drive. The high-pressure gas introduced into the power air chamber by the driving component drives the brush head to rotate. The exhaust port is located on the wall of the power air chamber and is used to discharge the gas after driving the drive components. The air blowing pipe and the brush head are arranged side by side, forming an integrated blowing and brushing execution end.

[0006] Furthermore, both the blowing air chamber and the power air chamber are equipped with regulating valves for adjusting the gas flow rate, and the outside of the pipe is equipped with an adjusting handle that is driven and connected to the regulating valve.

[0007] Furthermore, the drive component includes a turbine that is rotated by gas blowing, and a drive rod that is fixedly connected to the turbine on the same axis. The drive rod extends downward into the power air chamber and is connected to the brush head.

[0008] Furthermore, the drive rod body is provided with a bearing for vertically supporting the drive rod and enabling the drive rod to rotate smoothly, and the vent hole is located on the upper side of the bearing.

[0009] Furthermore, an exhaust port is located on the partition and connected to the blowing chamber, used to draw gas from the drive component into the blowing chamber and discharge it.

[0010] Furthermore, a one-way valve is provided inside the exhaust port to prevent gas in the blowing chamber from flowing back into the power chamber.

[0011] Furthermore, the brush head includes a mounting rod and bristles evenly distributed on the sidewall and lower end face of the mounting rod.

[0012] Furthermore, the end of the drive rod extending from the power air chamber is provided with a polygonal connector, and the upper end face of the mounting rod is provided with a polygonal mounting groove that matches the polygonal connector.

[0013] Furthermore, a threaded mounting hole is provided on one side of the polygonal connector, and a threaded through hole is provided on one side of the polygonal mounting groove, which is adapted to the threaded mounting hole. Screws are provided in the corresponding threaded mounting hole and threaded through hole.

[0014] Furthermore, the lower end of the air blowing tube is provided with a bent section, which is inclined toward the brush head.

[0015] Compared with the prior art, the beneficial effects of this utility model are: By using the same high-pressure air source for branch delivery, the high-pressure air blowing and mechanical brushing functions are integrated into one. The air blowing pipe and the rotating brush head work together to simultaneously handle loose floating sand and stubborn sticky sand, significantly improving cleaning efficiency and effectiveness. By setting the drive component, the mechanical rotation of the brush head can effectively remove the sticky sand that is difficult to remove by air blowing. It is especially suitable for cleaning the curved pipes, deep holes and dead corners of complex sand mold cavities, and has strong versatility. By setting regulating valves, the pressure of the blowing airflow and the rotation speed of the brush head can be controlled independently to adapt to sand molds of different strengths and structures, and to avoid damage to the surface of the sand mold due to excessive pressure or rotation speed. By setting a detachable brush head, the appropriate brush head can be replaced according to the structure of the sand mold, thereby meeting the cleaning operation of floating sand for sand molds with different structures. By setting an exhaust port connected to the blowing chamber, the exhaust gas after driving the turbine can be recovered and discharged into the main blowing airflow, which not only enhances the blowing ability, but also completely avoids the secondary dust problem caused by the exhaust gas being discharged in the middle of the tool, thus improving the working environment. This invention achieves dual functions of high-pressure purging and rotary brushing through the integrated design of air distribution and execution end, greatly improving the cleaning efficiency and thoroughness of floating sand in the inner cavity of complex sand molds, providing strong support for high-quality sand mold processing and production, and possessing significant advantages of high efficiency, environmental protection, flexibility and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the brush head assembly structure of this utility model.

[0017] In the diagram: 1. Intake pipe; 2. Pipe fittings; 2.1. Partition plate; 2.2. Air blowing chamber; 2.3. Power air chamber; 2.4. Regulating valve; 2.4.1. Regulating handle; 2.5. Exhaust port; 3. Brush head; 3.1. Mounting rod; 3.1.1. Polygonal mounting groove; 3.1.2. Threaded through hole; 3.2. Brush bristles; 4. Air blowing pipe; 4.1. Bend section; 5. Three-way valve; 6. Pneumatic drive components; 6.1. Turbine; 6.2. Drive rod; 6.3. Bearing; 6.4. Polygonal connector; 6.4.1. Threaded mounting hole; 6.4.2. Screw. Detailed Implementation

[0018] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0019] Please refer to the instruction manual appendix. Figure 1-3 This utility model provides a technical solution: Example 1: A sand mold processing device for rapid forming of aluminum alloy castings includes a hollow tube 2. A partition 2.1 is provided inside the tube 2, which divides the inner cavity of the tube 2 into a blowing air chamber 2.2 and a power air chamber 2.3. An air inlet pipe 1 for supplying high-pressure gas into the tube 2 is provided at the upper end of the tube 2. A three-way valve 5 is provided inside the tube 2 to connect the air inlet pipe 1 with the blowing air chamber 2.2 and the power air chamber 2.3, and the air path is distributed by the three-way valve 5. The lower end of the fitting 2 is provided with an air blowing pipe 4 connected to the air blowing chamber 2.2. The air blowing pipe 4 can be used to export high-pressure gas and blow away the floating sand on the surface of the sand mold. The lower end of the fitting 2 is also provided with a brush head 3 connected to the power air chamber 2.3. In order to realize the rotation of the brush head 3, the power air chamber 2.3 is provided with a driving component 6 connected to the brush head 3. The driving component 6 includes a turbine 6.1 that is driven by gas to rotate, and a driving rod 6.2 that is coaxially fixedly connected to the turbine 6.1. The driving rod 6.2 extends downward into the power air chamber 2.3 and is connected to the brush head 3. By utilizing the cooperation between the power air chamber 2.3 and the driving component 6, the high-pressure gas entering the power air chamber 2.3 drives the brush head 3 to rotate, thereby effectively scraping away the stubborn floating sand on the surface of the sand mold. In order to realize the discharge and depressurization of the gas in the power air chamber 2.3, the cavity wall of the power air chamber 2.3 is provided with an exhaust hole 2.5 for discharging the gas after driving the driving component 6. The air blowing pipe 4 and the brush head 3 are arranged side by side. The length of the air blowing pipe 4 is shorter than that of the brush head 3. The lower end of the air blowing pipe 4 is provided with a bent section 4.1. The bent section 4.1 is inclined towards the brush head 3. The rotation of the brush head 3 scrapes and the blowing of the air blowing pipe 4 form an integrated blowing and brushing execution end, which greatly improves the cleaning efficiency of floating sand on the surface of the sand mold.

[0020] In Example 2, in order to regulate the gas pressure blown out of the blowing chamber 2.2 and control the rotation speed of the brush head 3 to avoid damage to the sand mold, both the blowing chamber 2.2 and the power chamber 2.3 are equipped with regulating valves 2.4 for adjusting the gas flow rate. The outside of the pipe 2 is equipped with a regulating handle 2.4.1 that is driven and connected to the regulating valve 2.4. The regulating valve 2.4 can be used to adjust the flow rate of high-pressure gas, and the blowing pressure and the rotation speed of the brush head 3 can be indirectly adjusted by stabilizing the inlet pressure.

[0021] In Example 3, to ensure the stable rotation of the brush head 3 and further improve the stability of the drive component 6, a bearing 6.3 is provided on the drive rod 6.2 to vertically support the drive rod 6.2 and enable it to rotate smoothly. The outer ring surface of the bearing 6.3 is fixedly connected to the inner wall of the power air chamber 2.3. The drive rod 6.2 passes through the inner ring of the bearing 6.3 and is connected to the inner ring surface. The bearing 6.3 can be used to vertically limit the drive rod 6.2, thereby ensuring the stability of the drive component 6 structure and providing strong support for the stable rotation of the brush head 3. To prevent the bearing 6.3 from affecting the depressurization and discharge of gas in the power air chamber 2.3, the exhaust port 2.5 is located on the upper side of the bearing 6.3.

[0022] In Example 4, in order to reuse the exhaust gas discharged from the power air chamber 2.3, an exhaust port 2.5 is provided on the partition plate 2.1 and connected to the blowing air chamber 2.2. It is used to draw the gas after driving the drive component 6 into the blowing air chamber 2.2 and discharge it. The way of discharging the exhaust gas into the blowing air chamber 2.2 increases the total flow rate of the blowing airflow, which not only improves the sand cleaning effect, but also effectively prevents the secondary dust problem caused by the exhaust gas being discharged to the outside. To prevent gas from flowing back into the power air chamber 2.3 from the blowing air chamber 2.2, a one-way valve is installed in the exhaust port 2.5 to prevent gas from flowing back into the power air chamber 2.3 from the blowing air chamber 2.2. When the air pressure in the power air chamber 2.3 is higher than that in the blowing air chamber 2.2 (i.e., when the turbine 6.1 is working), the air pressure will open the valve core of the one-way valve, allowing the exhaust gas to be discharged smoothly. When the turbine 6.1 stops working, the pressure in the power air chamber 2.3 drops, or the pressure in the blowing air chamber 2.2 rises abnormally, the air pressure in the blowing air chamber 2.2 will press the valve core against the valve seat from the opposite direction, thereby forming a seal and blocking the reverse flow of airflow. In Example 5, to ensure that the brush head 3 can be driven to rotate stably and effectively by the drive component 6, the brush head 3 includes a mounting rod 3.1 and bristles 3.2 evenly distributed on the side wall and lower end face of the mounting rod 3.1. The end of the drive rod 6.2 extending out of the power air chamber 2.3 is provided with a polygonal connector 6.4. The upper end face of the mounting rod 3.1 is provided with a polygonal mounting groove 3.1.1 that is adapted to the polygonal connector 6.4. By using the plug-in cooperation between the polygonal connector 6.4 and the polygonal mounting groove 3.1.1, the slippage phenomenon between the brush head 3 and the drive rod 6.2 can be effectively avoided. To facilitate the replacement of brush heads 3 of different sizes by staff to meet the needs of cleaning floating sand of different sand types, a threaded mounting hole 6.4.1 is provided on one side of the polygonal connector 6.4, and a threaded through hole 3.1.2 is provided on one side of the polygonal mounting groove 3.1.1, which is adapted to the threaded mounting hole 6.4.1. Screws 6.4.2 are provided in the corresponding threaded mounting hole 6.4.1 and threaded through hole 3.1.2.

[0023] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A sand mold processing device for rapid prototyping of aluminum alloy castings, characterized in that, include: The pipe fitting (2) has a hollow structure and a partition (2.1) is provided inside the pipe fitting (2). The partition (2.1) divides the inner cavity of the pipe fitting (2) into an air blowing chamber (2.2) and a power air chamber (2.3). An air inlet pipe (1) is located at the upper end of the pipe fitting (2) and is used to deliver high-pressure gas into the pipe fitting (2); A three-way valve (5) is installed inside the pipe fitting (2), and its ends are connected to the air inlet pipe (1), the blowing air chamber (2.2) and the power air chamber (2.3) respectively to distribute the air path; The air blowing pipe (4) is located at the lower end of the pipe fitting (2) and is connected to the air blowing chamber (2.2) for discharging high-pressure gas and blowing away floating sand on the surface of the sand mold; The brush head (3) is located at the lower end of the pipe fitting (2) and is connected to the power air chamber (2.3) for scraping off stubborn floating sand from the surface of the sand mold. The driving component (6) is located in the power air chamber (2.3) and is connected to the brush head (3) for driving. The high-pressure gas introduced into the power air chamber (2.3) by the driving component (6) drives the brush head (3) to rotate. The exhaust port (2.5) is located on the wall of the power air chamber (2.3) and is used to discharge the gas after the drive component (6); Among them, the air blowing pipe (4) and the brush head (3) are arranged side by side to form an integrated blowing and brushing execution end.

2. The sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 1, characterized in that: Both the blowing air chamber (2.2) and the power air chamber (2.3) are equipped with regulating valves (2.4) for adjusting the gas flow rate, and the outside of the pipe fitting (2) is equipped with a regulating handle (2.4.1) that is driven and connected to the regulating valve (2.4).

3. The sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 1, characterized in that: The drive unit (6) includes a turbine (6.1) that rotates due to gas blowing, and a drive rod (6.2) that is coaxially fixedly connected to the turbine (6.1). The drive rod (6.2) extends downward into the power air chamber (2.3) and is connected to the brush head (3).

4. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 3, characterized in that: The drive rod (6.2) has a bearing (6.3) on its body for vertically supporting the drive rod (6.2) and enabling the drive rod (6.2) to rotate smoothly. The exhaust hole (2.5) is located on the upper side of the bearing (6.3).

5. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 4, characterized in that: The exhaust port (2.5) is located on the partition (2.1) and connected to the blowing chamber (2.2), and is used to draw the gas after driving the drive unit (6) into the blowing chamber (2.2) and discharge it.

6. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 5, characterized in that: The exhaust port (2.5) is equipped with a one-way valve to prevent the gas in the blowing chamber (2.2) from flowing back into the power chamber (2.3).

7. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 3, characterized in that: The brush head (3) includes a mounting rod (3.1) and bristles (3.2) evenly distributed on the side wall and lower end face of the mounting rod (3.1).

8. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 7, characterized in that: The end of the drive rod (6.2) extending out of the power air chamber (2.3) is provided with a polygonal connector (6.4), and the upper end face of the mounting rod (3.1) is provided with a polygonal mounting groove (3.1.1) that is compatible with the polygonal connector (6.4).

9. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 8, characterized in that: A threaded mounting hole (6.4.1) is provided on one side of the polygonal connector (6.4), and a through polygonal mounting groove (3.1.1) is provided on one side. 3.1.1), and a threaded through hole that corresponds to and is adapted to the threaded mounting hole (6.4.1). 3.1.2), the corresponding threaded mounting hole (6.4.1) and threaded through hole (3.1.2) are equipped with screws (6.4.2).

10. A sand mold processing device for rapid prototyping of aluminum alloy castings according to claim 1, characterized in that: The lower end of the air blowing pipe (4) is provided with a bent section (4.1), which is inclined toward the brush head (3).

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