A device for removing fine powder from foundry sand

Abstract

The invention discloses a device for removing fine powder from molding sand for casting, which comprises a machine body and a feeding port arranged on the top of the machine body, a dropping device is arranged on the upper part of the machine body; a fine powder removing device is arranged below the dropping device; a fine powder collecting device and a molding sand collecting device are arranged below the fine powder removing device; a rotating motor is arranged at the bottom center of the machine body, and the rotating motor is connected with the dropping device and the fine powder removing device through a motor shaft; the invention can efficiently remove fine powder from the molding sand to be processed, and at the same time can solve the problem of partial agglomeration of the molding sand, and finally can collect the fine powder and molding sand, the whole processing process is stable and reliable, and the operation is very convenient and easy.

Description

Technical Field

[0001] The invention belongs to the technical field of foundry sand processing, in particular to a device for removing fine powder of foundry sand. Background Art

[0002] Molding sand is a material used for molding in casting. Molding sand is generally made by mixing raw sand for casting, molding sand binder and additives and other molding materials in a certain proportion. Molding sand can be divided into clay sand, water glass sand, cement sand, resin sand, etc. according to the different binders used. Clay sand, water glass sand and resin sand are the most commonly used. Molding sand plays an extremely important role in casting production. The waste castings caused by poor quality of molding sand account for about 30~50% of the total waste castings.

[0003] High-quality molding sand has the following characteristics: ① It has high strength and thermal stability to withstand various external forces and high temperatures. ② Good fluidity, that is, the ability of the sand particles to move relative to each other under the action of external force or its own gravity. ③ Certain plasticity, that is, the ability of the molding sand to deform under the action of external force and maintain the given shape when the external force is removed. ④ Good air permeability, that is, the ability of the pores of the molding sand to pass gas. ⑤ High collapsibility, also known as sand discharge, that is, whether the molding sand is easy to break and whether it is easy to remove from the casting after the casting solidifies.

[0004] In the existing molding sand processing process, there are problems such as partial agglomeration and inclusion of fine powder. If they are not solved and directly used for casting production, serious defects will be caused in the internal structure and surface effect of the casting. Therefore, a processing equipment is needed that can efficiently remove fine powder in the molding sand and further dehumidify and avoid agglomeration. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and provide a device for removing fine powder from molding sand for casting, which can efficiently remove fine powder from the molding sand to be processed, and at the same time solve the problem of partial agglomeration of the molding sand. Finally, the fine powder and molding sand can be collected. The whole processing process is stable and reliable, and the operation is very convenient and easy.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a device for removing fine powder from molding sand for casting, which comprises a machine body and a feeding port arranged at the top of the machine body, a material dropping device is arranged at the upper part of the machine body; a fine powder removal device is arranged below the material dropping device; a rotating motor is arranged at the bottom center of the machine body; the fine powder removal device comprises an air outlet net bucket in the shape of an inverted truncated cone and hollow inside, which is arranged below the material dropping device, and air outlet holes are evenly spaced on the lower surface of the air outlet net bucket; the top of the air outlet net bucket is connected to the fan through a ventilation hose; a funnel-shaped screen bucket is arranged below the air outlet net bucket, and a molding sand collecting device is arranged at the bottom center of the screen bucket; a fine powder collecting device is arranged below the screen bucket; a motor shaft is connected to the bottom of the air outlet net bucket, and the motor shaft is driven by a rotating motor; a fine powder filtering area is provided between the air outlet net bucket and the screen bucket.

[0007] Furthermore, the blanking device comprises a blanking cone cylinder arranged in the machine body, and the feed port is arranged directly above the blanking cone cylinder.

[0008] Furthermore, the cylinder wall of the blanking cone and the inner wall of the upper part of the machine body are provided with spiral blades for uniform blanking.

[0009] Furthermore, the fine powder collecting device comprises a powder collecting chamber arranged directly below the sieve bucket, a powder falling channel is arranged downward from the center of the powder collecting chamber, and a powder outlet is arranged at the bottom of the powder falling channel.

[0010] Furthermore, a powder exhaust fan is provided at the powder outlet.

[0011] Furthermore, the molding sand collecting device includes a sand falling channel arranged at the bottom of the fine powder filtering area; a conical sand falling slope is arranged at the bottom of the sand falling channel, and a molding sand collecting trough is arranged outside the sand falling slope; a discharge port is opened at one end of the molding sand collecting trough.

[0012] Furthermore, the air outlet net bucket and the screen bucket are provided with hemispherical protrusions on the surface on the side close to the fine powder filtering area.

[0013] Furthermore, the fan blows dry hot air toward the ventilation hose.

[0014] Furthermore, supporting feet are arranged around the bottom of the machine body.

[0015] Beneficial effects of the present invention:

[0016] 1. The device of the present invention can quickly remove the mixed fine powder in the fine powder removal device through the mutual extrusion and friction between the air outlet net bucket and the screen bucket, and cooperate with the airflow of the fan; at the same time, it can further test the strength, fluidity, plasticity and air permeability of the molding sand. The entire fine powder removal process is automated and sustainable, which not only improves the processing efficiency but also reduces the labor intensity.

[0017] 2. The material dropping device in the device of the present invention can make the material fall more evenly and gently. At the same time, in order to further pre-crush the larger agglomerated sand, spiral blades are added to squeeze and break it up.

[0018] 3. The fine powder collection device in the device of the present invention can collect the fine powder to the powder outlet through the airflow generated by the fan and the natural gravity in the powder collecting chamber. The entire environment is closed and efficient, which avoids dust pollution and is also convenient for subsequent determination of the powder content of the molding sand.

[0019] 4. The molding sand collecting device of the device of the present invention is located at the bottom of the fine powder filtering area in the shape of an inverted truncated cone. After the molding sand is treated by powder removal, it will naturally fall into the sand falling channel due to gravity, and finally be quickly collected, which is very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a half-sectioned three-dimensional structure of the device of the present invention.

[0021] Figure 2 It is a three-dimensional schematic diagram of the device of the present invention.

[0022] Figure 3 It is a top schematic diagram of the device of the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of the cross section of AA.

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A in the figure.

[0025] In the figure: 1. machine body; 2. material dropping device; 3. fine powder removal device; 4. fine powder collecting device; 5. molding sand collecting device; 6. rotating motor; 7. feeding port; 8. motor shaft; 101. support foot; 201. material dropping cone; 203. spiral blade; 301. fan; 302. ventilation hose; 303. discharging net bucket; 304. sieve bucket; 305. protrusion; 306. fine powder filtering area; 401. powder collecting chamber; 402. powder dropping channel; 403. powder outlet; 404. powder exhaust fan; 501. sand dropping channel; 502. sand dropping slope; 503. molding sand collecting trough; 504. discharging port.

[0026] Specific implementation party

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0028] like Figure 1-Figure 5 As shown, the specific structure of the present invention is: a casting sand fine powder removal device, which includes a body 1 and a feed port 7 arranged at the top of the body 1, a material dropping device 2 is arranged at the upper part of the body 1; a fine powder removal device 3 is arranged below the material dropping device 2; a rotating motor 6 is arranged at the bottom center of the body 1; the fine powder removal device 3 includes an inverted truncated cone-shaped and hollow air outlet net 303 arranged below the material dropping device 2, and air outlet nets 303 are evenly spaced on the lower surface. hole; the top of the air outlet net bucket 303 is connected to the fan 301 through a ventilation hose 302; a funnel-shaped screen bucket 304 is arranged below the air outlet net bucket 303, and a molding sand collecting device 5 is arranged at the bottom center of the screen bucket 304; a fine powder collecting device 4 is arranged below the screen bucket 304; a motor shaft 8 is connected to the bottom of the air outlet net bucket 303, and the motor shaft 8 is driven by a rotating motor 6; a fine powder filtering area 306 is between the air outlet net bucket 303 and the screen bucket 304.

[0029] In order to make the material fall more evenly and smoothly, the material dropping device 2 includes a material dropping cone 201 arranged in the machine body 1 , and the feed port 7 is arranged directly above the material dropping cone 201 .

[0030] In order to further break up the agglomerated molding sand, the cylinder wall of the blanking cone 201 and the upper inner wall of the machine body 1 are provided with spiral blades 202 for uniform blanking.

[0031] In order to further collect the screened fine powder, the fine powder collecting device 4 includes a powder collecting chamber 401 arranged directly below the sieve bucket 304, and a powder falling channel 402 is arranged downward from the center of the powder collecting chamber 401; a powder outlet 403 is arranged at the bottom of the powder falling channel 402.

[0032] In order to further improve the fine powder collection efficiency, a powder exhaust fan 404 is provided at the powder outlet 403 .

[0033] In order to collect the mold sand after screening and processing, the mold sand collecting device 5 includes a sand falling channel 501 arranged at the bottom of the fine powder filtering area 306; a conical sand falling slope 502 is arranged at the bottom of the sand falling channel 501, and a mold sand collecting trough 503 is arranged on the outside of the sand falling slope 502; a discharge port 504 is opened at one end of the mold sand collecting trough 503.

[0034] In order to further improve the effect of breaking up lumps and removing fine powder when the molding sand passes through the fine powder filtering area 306 , the air outlet net bucket 303 and the screen bucket 304 are provided with hemispherical protrusions 305 on the surface close to the fine powder filtering area 306 .

[0035] In order to further dry the molding sand, the fan 301 blows dry hot air to the ventilation hose 302 .

[0036] Preferably, legs 101 are arranged around the bottom of the body 1 .

[0037] When the device is working, the molding sand to be processed is put in through the upper feed port, and falls into the fine powder filtration area through the dropping cone in the dropping device; then, under the extrusion of the upper air outlet net bucket and the lower screen bucket and the impact of the airflow, the fine powder mixed in the molding sand is brought to the powder collecting chamber through the fine holes of the screen bucket, and at the same time, the molding sand after powder removal is collected through the molding sand collecting device at the bottom center; and the fine powder is brought to the powder outlet through the powder collecting chamber by the powder exhaust fan.

[0038] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A casting sand fine powder removal device, comprising a body (1) and a feed port (7) arranged on the top of the body (1), characterized in that: A material dropping device (2) is arranged at the upper part of the body (1); a fine powder removal device (3) is arranged below the material dropping device (2); a rotating motor (6) is arranged at the bottom center of the body (1); the fine powder removal device (3) comprises an air outlet net bucket (303) which is in the shape of an inverted truncated cone and hollow inside and is arranged below the material dropping device (2); air outlet holes are evenly arranged at intervals on the lower surface of the air outlet net bucket (303); the top of the air outlet net bucket (303) is connected to the fan (301) through a ventilation hose (302); a funnel-shaped sieve bucket (304) is arranged below the air outlet net bucket (303); a molding sand collecting device (5) is arranged at the bottom center of the sieve bucket (304); the sieve bucket (304 ... A fine powder collecting device (4) is arranged below the screen hopper (304); a motor shaft (8) is connected to the bottom of the air outlet net hopper (303), and the motor shaft (8) is driven by a rotating motor (6); a fine powder filtering area (306) is provided between the air outlet net hopper (303) and the screen hopper (304); the fine powder collecting device (4) comprises a powder collecting chamber (401) arranged directly below the screen hopper (304), and a powder dropping channel (402) is arranged downward at the center of the powder collecting chamber (401); a powder outlet (403) is arranged at the bottom of the powder dropping channel (402); and a hemispherical protrusion (305) is arranged on the surface of the air outlet net hopper (303) and the screen hopper (304) on the side close to the fine powder filtering area (306).

2. The device for removing fine powder from foundry sand according to claim 1, characterized in that: The blanking device (2) comprises a blanking cone (201) arranged in the machine body (1), and the feed port (7) is arranged directly above the blanking cone (201).

3. The device for removing fine powder from foundry sand according to claim 2, characterized in that: The cylinder wall of the blanking cone cylinder (201) and the upper inner wall of the machine body (1) are provided with spiral blades (202) for uniform blanking.

4. The device for removing fine powder from foundry sand according to claim 1, characterized in that: A powder exhaust fan (404) is provided at the powder outlet (403).

5. The device for removing fine powder from foundry sand according to claim 1, characterized in that: The molding sand collecting device (5) comprises a sand falling channel (501) arranged at the bottom of the fine powder filtering area (306); a conical sand falling inclined surface (502) is arranged at the bottom of the sand falling channel (501), and a molding sand collecting trough (503) is arranged outside the sand falling inclined surface (502); and a discharge port (504) is opened at one end of the molding sand collecting trough (503).

6. The device for removing fine powder from foundry sand according to claim 1, characterized in that: The fan (301) blows dry hot air toward the ventilation hose (302).

7. The device for removing fine powder from foundry sand according to claim 1, characterized in that: Support legs (101) are arranged around the bottom of the machine body (1).

Images