A hood-type sand float

Abstract

The utility model discloses a hood formula floating sand machine relates to investment casting equipment technical field, include: base, as the air chamber structure, provide stable airflow distribution foundation, inside is equipped with airflow guide structure to optimize sand floating effect, the box body, as sand chamber structure, with base sealed connection, form closed work space, the box body top is equipped with dust absorption cavity, dust removal pipeline interface, connect dust absorption cavity with external dust removal system, high pressure fan, set up in base side edge to provide airflow, breathable support plate, install in the top of base, surface distribution circular breathable hole, edge and base pass through silica gel sealing strip pressure and close, and the floating sand machine is equipped with reasonable breathable hole area, when model sand sticking, can provide sufficient and even boiling state's floating sand, can keep good state operation maintenance cycle long -term, thereby reduce the labor intensity of equipment maintenance staff and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of investment casting equipment, and in particular to a wind-cap type floating sand machine. Background Technology

[0002] The wind-cap type sand flotation machine is a sand floating device specifically designed for investment casting, incorporating fluidized bed gasification furnace air distribution technology. It has been widely used in precision casting, automotive parts manufacturing, and other fields, particularly excelling in the production of high-precision castings such as aero-engine blades and gas turbine disks. Traditional sand flotation machines in the foundry industry use a fan to directly blow air into the bottom of the sand drum, utilizing airflow to float the molding sand and complete the sand adhesion process. However, the horizontal, direct airflow makes it difficult to create a three-dimensional boiling state, resulting in large fluctuations in the floating height of the molding sand, and the potential for dead zones in certain areas, affecting the uniformity of sand adhesion. The open structure leads to dust overflow, polluting the working environment, and dust residue affects the molding sand recycling rate, increasing production costs. Furthermore, the unreasonable design of the vents in traditional equipment easily clogs the air ducts, requiring frequent shutdowns for cleaning, resulting in short maintenance cycles and high costs.

[0003] In existing technologies, traditional floating sand machines in investment casting equipment often suffer from unreasonable vent area, resulting in insufficient and uneven floating sand when the model sticks to the sand. It is difficult to provide sufficient and uniform floating sand in a boiling state when the model sticks to the sand, making it difficult to operate stably for a long time, with long maintenance cycles, high labor intensity for maintenance personnel, and low production efficiency. Therefore, a wind cap type floating sand machine is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of existing technology, such as the unreasonable area of ​​the vent holes in traditional floating sand machines in investment casting equipment, which leads to insufficient and uneven floating sand when the model sticks to the sand. It is difficult to provide sufficient and uniform floating sand in a boiling state when the model sticks to the sand, making it difficult to operate stably for a long time, with long maintenance cycles, high labor intensity for maintenance personnel, and low production efficiency. Therefore, a wind cap type floating sand machine is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wind-vented type sand-floating machine includes: The base, as the wind chamber structure, provides a stable foundation for airflow distribution, and has an internal airflow guiding structure to optimize the floating effect of molding sand; The housing, as a sand chamber structure, is sealed to the base to form a closed working space, and the top of the housing is provided with a dust collection chamber. Dust collection duct interface, connecting the dust collection chamber to the external dust collection system; A high-pressure blower is installed on the side of the base to provide airflow; A breathable support plate is installed above the base, with circular ventilation holes distributed on its surface, and its edges are pressed together with the base by a silicone sealing strip; Stainless steel filter screen, embedded in the slot below the air-permeable support plate, and fixed by quick-release bolts; The breathable hood has a hemispherical protrusion at the top and spiral guide grooves on the side wall.

[0006] The above technical solution further includes: The air chamber structure of the base evenly disperses airflow through the circular air vents in the breathable support plate.

[0007] The spiral guide groove of the ventilated hood generates a rotating vortex, causing the molding sand to boil inside the floating sand machine box.

[0008] The stainless steel filter screen traps dust, and the clean airflow is discharged through the dust suction chamber and the dust removal pipe interface.

[0009] The stainless steel filter screen has a mesh size of 50 and a wire diameter of 0.2 mm. It is embedded in the slot below the breathable support plate (6) and fixed by quick-release bolts. The filtration efficiency is ≥98%.

[0010] The dust collection chamber has an air intake on its side, and there are multiple sets of air intakes.

[0011] A duct is fixedly connected to the side of the base near the high-pressure blower, and the duct is located at the output end of the high-pressure blower.

[0012] The high-pressure blower is equipped with a mounting base at its bottom for fixation.

[0013] This utility model has the following beneficial effects: By embedding a stainless steel filter screen in the slot below the ventilated support plate, dust is efficiently trapped, preventing it from entering the high-pressure blower or airflow duct, significantly extending the equipment's lifespan. The floating sand machine is equipped with a reasonable vent area, which can provide sufficient and uniform boiling floating sand when the model sticks to the sand, maintaining good operating conditions for a long time and extending the maintenance cycle, thereby reducing the labor intensity of equipment maintenance personnel and improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a wind-cap type floating sand machine proposed in this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 for Figure 1 Cross-sectional view of the structure at point A.

[0015] In the diagram: 1. Base; 2. Housing; 3. Dust collection chamber; 4. Dust removal pipe interface; 5. High-pressure blower; 6. Ventilation support plate; 7. Stainless steel filter screen; 8. Ventilation hood; 9. Air intake; 10. Air duct; 11. Mounting base. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3 As shown, this utility model is a wind-cap type floating sand machine, comprising: The base 1, as the air chamber structure, provides a stable airflow distribution foundation and has an internal airflow guiding structure to optimize the floating effect of the molding sand.

[0018] The box 2, as a sand chamber structure, is sealed to the base 1 to form a closed working space. The top of the box 2 is provided with a dust suction chamber 3.

[0019] Dust removal pipe interface 4 connects the dust suction chamber 3 to the external dust removal system.

[0020] A high-pressure blower 5 is installed on the side of the base 1 to provide airflow.

[0021] A breathable support plate 6 is installed above the base 1, with circular breathable holes distributed on its surface, and its edges are pressed together with the base 1 by a silicone sealing strip.

[0022] The stainless steel filter screen 7 is embedded in the slot below the breathable support plate 6 and is fixed by quick-release bolts.

[0023] The breathable hood 8 has a hemispherical protrusion at the top and spiral guide grooves on the side wall.

[0024] The air chamber structure of the base 1 evenly disperses the airflow through the circular air vents of the breathable support plate 6.

[0025] The spiral guide groove of the vent cap 8 generates a rotating vortex, causing the molding sand to be in a boiling state inside the sand floating machine box 2.

[0026] The stainless steel filter screen 7 traps dust, and the clean airflow is discharged through the dust suction chamber 3 and the dust removal pipe interface 4.

[0027] The suction chamber 3 has an air inlet 9 on its side, and there are multiple sets of air inlets 9.

[0028] A duct 10 is fixedly connected to the side of the base 1 near the high-pressure blower 5, and the duct 10 is located at the output end of the high-pressure blower 5.

[0029] In this embodiment, the high-pressure blower 5 operates at its rated power, delivering airflow to the air chamber structure of the base 1 through the air duct 10. The base 1 has internal airflow guiding ribs, such as spiral or radial ribs, to guide the airflow to below the ventilated support plate 6, preventing localized airflow concentration or dead zones. The surface of the ventilated support plate 6 is distributed with circular vent holes of 10mm diameter and a spacing of 20mm, covering 28% of the ventilated area. The airflow is evenly dispersed as it passes through the vent holes, forming a stable upward airflow with a wind speed of 1.2-1.8m / s. After rising from the ventilated support plate 6, the uniform airflow enters the bottom opening of the ventilated hood 8, allowing air to pass through... The side wall of the air hood 8 has 8 spiral guide grooves with a width of 3mm, a depth of 5mm, and an inclination angle of 15°. When the airflow spirals upward along the guide grooves, it generates a rotating vortex. The rotating vortex applies tangential force and lift to the molding sand, causing the molding sand to be in a boiling state in the box 2. The floating height reaches 30-50mm above the model surface, ensuring that the molding sand fully covers the model surface during the sand bonding process. When the dust reaches below the breathable support plate 6, it is intercepted by the stainless steel filter screen 7 embedded in the slot. The filter screen has a mesh size of 50 mesh, a wire diameter of 0.2mm, and a filtration efficiency of ≥98%. The filtered clean airflow is discharged through the dust suction chamber 3 and the dust removal pipe interface 4.

[0030] In one embodiment, the high-pressure blower 5 is provided with a mounting base 11 at its bottom for fixing.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hood-type sand mill characterized by comprising: include: The base (1) serves as the air chamber structure, providing a stable airflow distribution foundation. An internal airflow guiding structure is provided to optimize the floating effect of the molding sand. The box (2), as a sand chamber structure, is sealed to the base (1) to form a closed working space. The top of the box (2) is provided with a dust suction chamber (3). Dust removal pipe interface (4) connects the dust collection chamber (3) to the external dust removal system; A high-pressure blower (5) is installed on the side of the base (1) to provide airflow; A breathable support plate (6) is installed above the base (1), with circular breathable holes distributed on its surface, and its edges are pressed together with the base (1) by a silicone sealing strip; A stainless steel filter screen (7) is embedded in the slot below the breathable support plate (6) and fixed by quick-release bolts; The breathable hood (8) has a hemispherical protrusion at the top and spiral guide grooves on the side wall.

2. The wind-blown type sand-floating machine according to claim 1, characterized in that, The air chamber structure of the base (1) evenly disperses the airflow through the circular air vents of the air-permeable support plate (6).

3. The wind-blown type sand-floating machine according to claim 1, characterized in that, The spiral guide groove of the ventilated hood (8) generates a rotating vortex, causing the molding sand to be in a boiling state inside the floating sand machine box (2).

4. The wind-blown type sand-floating machine according to claim 1, characterized in that, The stainless steel filter (7) traps dust, and the clean airflow is discharged through the dust suction chamber (3) and the dust removal pipe interface (4).

5. A wind-cap type floating sand machine according to claim 1, characterized in that, The dust collection chamber (3) has an air intake (9) on its side, and there are multiple sets of air intakes (9).

6. A wind-driven cap-type sand-floating machine according to claim 1, characterized in that, The base (1) is fixedly connected to a duct (10) on the side near the high-pressure blower (5), and the duct (10) is located at the output end of the high-pressure blower (5).

7. A wind-cap type floating sand machine according to claim 1, characterized in that, The high-pressure blower (5) is provided with a mounting base (11) at the bottom for fixing.

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