Cold sand impurity removal device for casting

Abstract

The utility model discloses a cold sand impurity removal device for casting, which comprises a barrel, a sand screening mechanism, a cooling mechanism and a vibrating mechanism, a conical charging barrel is arranged at the bottom of the barrel, and the sand screening mechanism comprises a first mounting ring, a second mounting ring and a third mounting ring which are arranged on the inner wall of the barrel. A first annular mounting plate, a second annular mounting plate and a third annular mounting plate are movably arranged at the top ends of the first mounting ring, the second mounting ring and the third mounting ring, and a first sieve plate, a second sieve plate and a third sieve plate are arranged at the bottoms of the first annular mounting plate, the second annular mounting plate and the third annular mounting plate correspondingly. The vibrating mechanism comprises a mounting frame and a vibrating motor; the cooling mechanism comprises an annular cooling jacket and a conical cooling jacket which are arranged on the outer walls of the barrel and the conical charging barrel; quartz sand in the barrel is screened and purified by the first sieve plate, the second sieve plate and the third sieve plate, and the quartz sand can be cooled by the annular cooling jacket and the conical cooling jacket which are filled with cold water.

Description

Technical Field

[0001] The utility model relates to the technical field of casting processing equipment, in particular to a cold sand impurity removal device for casting. Background Art

[0002] Lost foam casting (also known as full-mold casting) is a new casting method in which paraffin wax or foam models with similar size and shape to the casting are bonded together to form a model cluster, coated with refractory paint and dried, and then buried in dry quartz sand for vibration molding. The model is poured under negative pressure to vaporize the model, and liquid metal occupies the position of the model. After solidification and cooling, the casting is formed. Since quartz sand is recycled, the quartz sand entering the sand storage will have a certain temperature. In order to avoid deformation of the foam model caused by the use of high-temperature quartz sand, the used quartz sand needs to be cooled. In addition, the quartz sand that has been recycled many times will be mixed with some impurities during the operation process. When it is reused, it needs to be decontaminated to prevent affecting the casting effect. For this reason, we propose a cold sand decontamination device for casting. Utility Model Content

[0003] The problem to be solved by the utility model is that quartz sand used for casting needs to be cleaned of impurities and cooled.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a cold sand impurity removal device for casting, which includes a hollow cylinder, a sand screening mechanism, a cooling mechanism, and a vibration mechanism. The top opening of the cylinder is threadedly connected to a top cover, and the bottom opening of the cylinder is sealed with a conical charging barrel, and the bottom end of the conical charging barrel is connected to a discharge pipe, and a first opening and closing valve is provided on the discharge pipe. The sand screening mechanism includes a first mounting ring, a second mounting ring, and a third mounting ring which are spaced apart from each other on the inner wall of the cylinder from bottom to top. The sizes of the first mounting ring, the second mounting ring, and the third mounting ring are exactly the same, and the tops of the first mounting ring, the second mounting ring, and the third mounting ring are respectively movably provided with a first annular mounting ring. A mounting plate, a second annular mounting plate, and a third annular mounting plate, the top diameters of the first annular mounting plate, the second annular mounting plate, and the third annular mounting plate are larger than the bottom diameters, and the bottoms of the first annular mounting plate, the second annular mounting plate, and the third annular mounting plate are respectively provided with a first sieve plate, a second sieve plate, and a third sieve plate, the vibration mechanism includes a mounting frame arranged on the upper part of the cylinder, a vibration motor is arranged on the mounting frame, three support plates are arranged at equal angles on the bottom of the cylinder, and support legs are arranged at the bottom ends of the support plates, the cooling mechanism includes an annular cooling jacket arranged on the outer wall of the cylinder and a conical cooling jacket arranged on the outer wall of the conical charging barrel, the interiors of the annular cooling jacket and the conical cooling jacket are hollow structures.

[0005] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, a limiting cylinder is provided in the middle of the bottom end of the top cover, a rubber pad is movably provided in the limiting cylinder, and a first spring is fixed between the rubber pad and the limiting cylinder.

[0006] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, wherein: two first through grooves and two second through grooves are symmetrically provided on both sides of the inner walls of the second mounting ring and the third mounting ring, the top diameters of the first annular mounting plate, the second annular mounting plate, and the third annular mounting plate are equal to the inner diameters of the first mounting ring, the second mounting ring, and the third mounting ring, and two lap plates are symmetrically provided on both sides of the top ends of the first annular mounting plate, the second annular mounting plate, and the third annular mounting plate, and the sizes of the lap plates are adapted to the first through groove and the second through groove.

[0007] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, wherein: a straight rod is erected in the middle of the first screen plate, a first through hole with a diameter larger than the diameter of the straight rod is opened in the middle of the second screen plate, a first hollow tube is provided at the first through hole, the straight rod passes through the first hollow tube and extends upward to the top opening of the cylinder, a second through hole with a diameter larger than the diameter of the first hollow tube is provided in the middle of the third screen plate, a second hollow tube is provided at the second through hole, the first hollow tube passes through the second hollow tube and extends upward to the top opening of the cylinder, and the top of the second hollow tube extends upward to the top opening of the cylinder.

[0008] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, wherein: the first sieve plate is evenly distributed with a plurality of first sieve holes, the second sieve plate is evenly distributed with a plurality of second sieve holes, the third sieve plate is evenly distributed with third sieve holes, and the diameters of the third sieve holes, the second sieve holes, and the first sieve holes decrease in sequence.

[0009] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, wherein: the bottom end of the annular cooling jacket is connected to the top end of the conical cooling jacket through a water pipe, the upper part of the annular cooling jacket is connected to a water inlet pipe, and a second opening and closing valve is provided on the water inlet pipe, and the bottom end of the conical cooling jacket is connected to a water outlet pipe, and a third opening and closing valve is provided on the water outlet pipe.

[0010] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, wherein: rotating handles are respectively provided on both sides of the top of the top cover, and one side of the top of the top cover is connected to a feed hopper.

[0011] As a preferred solution of the cold sand impurity removal device for casting described in the utility model, the bottom of the support leg is slidably inserted into the plug-in cylinder, and a second spring is provided between the bottom wall of the plug-in cylinder and the bottom of the support leg.

[0012] The beneficial effects of the utility model are as follows: the utility model drives the cylinder to vibrate through the vibration motor, and the quartz sand inside the cylinder falls into the conical charging barrel after being screened and removed by the first sieve plate, the second sieve plate and the third sieve plate. The first sieve plate, the second sieve plate and the third sieve plate are separable from the cylinder, which is convenient for removing impurities. The quartz sand inside the cylinder can be cooled by the annular cooling jacket and the conical cooling jacket filled with cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0014] Figure 1 This is an overall structural diagram of a cold sand impurity removal device for casting.

[0015] Figure 2 This is a schematic diagram of the structure inside the cylinder of a cold sand impurity removal device for casting.

[0016] Figure 3 This is a schematic structural diagram from another perspective of the interior of the cylinder in a cold sand impurity removal device for casting.

[0017] Figure 4 This is a schematic diagram of the cooperation between the first annular mounting plate and the first screen plate in a cold sand impurity removal device for casting.

[0018] Figure 5 This is a schematic diagram of the cooperation between the second annular mounting plate and the second screen plate in a cold sand impurity removal device for casting.

[0019] Figure 6 This is a schematic diagram of the coordination between the third annular mounting plate and the third screen plate in a cold sand impurity removal device for casting.

[0020] Figure 7 This is a schematic diagram of the structure inside the limiting cylinder at the bottom end of the top cover in a cold sand impurity removal device for casting.

[0021] Figure 8 This is a schematic diagram of the structure of the support legs and the plug-in cylinder in a cold sand impurity removal device for casting. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1 to 8, This embodiment is a cold sand impurity removal device for casting, comprising a hollow structure cylinder 100, a sand screening mechanism 200, a cooling mechanism 300, and a vibrating mechanism 400, a top cover 101 is threadedly connected to the top opening of the cylinder 100, a conical charging barrel 102 is sealed at the bottom opening of the cylinder 100, a discharge pipe 102a is connected to the bottom end of the conical charging barrel 102, and a first opening and closing valve 102b is provided on the discharge pipe 102a, and the sand screening mechanism 200 comprises a first mounting ring 201, a second mounting ring 202, and a third mounting ring 203 which are spaced apart from bottom to top on the inner wall of the cylinder 100, the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203 are exactly the same in size, and a first annular mounting plate 201a, a second annular mounting plate 202a, and a third annular mounting plate 203 are movably provided on the top of the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203, respectively. The top diameters of the third annular mounting plate 203a, the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a are larger than the bottom diameter, and the bottoms of the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a are respectively provided with the first sieve plate 201b, the second sieve plate 202b and the third sieve plate 203b, the vibration mechanism 400 includes a mounting frame 401 arranged on the upper part of the cylinder 100, and a vibration motor 402 is arranged on the mounting frame 401, three support plates 403 are arranged at equal angles at the bottom of the cylinder 100, and support legs 404 are arranged at the bottom of the support plates 403, and the cooling mechanism 300 includes an annular cooling jacket 301 arranged on the outer wall of the cylinder 100 and a conical cooling jacket 302 arranged on the outer wall of the conical charging barrel 102, and the interiors of the annular cooling jacket 301 and the conical cooling jacket 302 are hollow structures.

[0024] Used quartz sand is poured into the cylinder 100, and the vibration motor 402 is turned on. The vibration motor 402 drives the cylinder 100 and the third sieve plate 203b, the second sieve plate 202b, and the first sieve plate 201b inside the cylinder 100 to vibrate together. The quartz sand is screened and removed by the third sieve plate 203b, the second sieve plate 202b, and the first sieve plate 201b three times. Since the quartz sand just used has a certain temperature, cold water is filled into the hollow annular cooling jacket 301 and the conical cooling jacket 302 to cool the quartz sand in the cylinder 100. After the quartz sand is screened, the quartz sand falling into the conical charging bucket 102 can be constantly tumbled under the vibration action of the vibration motor 402, so that the quartz sand is cooled more evenly and faster by the conical cooling jacket 302.

[0025] In this embodiment, a limiting cylinder 101a is provided in the middle of the bottom end of the top cover 101, a rubber pad 101b is movably provided in the limiting cylinder 101a, and a first spring 101c is fixed between the rubber pad 101b and the limiting cylinder 101a.

[0026] In this embodiment, two first through grooves 202c and two second through grooves 203c are symmetrically provided on both sides of the inner walls of the second mounting ring 202 and the third mounting ring 203, and the top diameters of the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a are equal to the inner diameters of the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203. Two lap plates 204 are symmetrically provided on both sides of the top of the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a, and the sizes of the lap plates 204 are adapted to the first through groove 202c and the second through groove 203c.

[0027] Because the top diameters of the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a are equal to the inner diameters of the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203, the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a can be perfectly aligned with the inner diameters of the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203, thereby preventing quartz sand or impurities from flowing out of the gaps between the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a and the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203.

[0028] In this embodiment, a straight rod 201d is erected in the middle of the first sieve plate 201b, a first through hole 202d with a diameter larger than that of the straight rod 201d is opened in the middle of the second sieve plate 202b, a first hollow tube 202e is provided at the first through hole 202d, and the straight rod 201d passes through the first hollow tube 202e and then extends upward to the top opening of the cylinder 100, a second through hole 203d with a diameter larger than that of the first hollow tube 202e is provided in the middle of the third sieve plate 203b, a second hollow tube 203e is provided at the second through hole 203d, the first hollow tube 202e passes through the second hollow tube 203e and then extends upward to the top opening of the cylinder 100, and the top of the second hollow tube 203e extends upward to the top opening of the cylinder 100.

[0029] When sequentially installing the first screen plate 201b, the second screen plate 202b, and the third screen plate 203b in the sand screening mechanism 200, first hold the straight rod 201d in the middle of the first screen plate 201b, align the two lap plates 204 at the top of the first annular mounting plate 201a, and pass them through the first through groove 202c and the second through groove 203c on the second mounting ring 202 and the third mounting ring 203, until the two lap plates 204 at the top of the first annular mounting plate 201a overlap the first mounting ring 201a. The top of the ring 201 is then held by the first hollow tube 202e in the middle of the second sieve plate 202b, so that the straight rod 201d in the middle of the first sieve plate 201b passes through the first hollow tube 202e, and the two lap plates 204 at the top of the second annular mounting plate 202a are aligned and pass through the second through slot 203c on the third mounting ring 203, and then the second annular mounting plate 202a is rotated to overlap the two lap plates 204 at the top of the second annular mounting plate 202a on the second mounting ring 202, and then Hold the second hollow tube 203e, pass the first hollow tube 202e through the second hollow tube 203e, and finally make the two overlapping plates 204 on both sides of the top of the third annular mounting plate 203a overlap the third mounting ring 203, tighten the top cover 101 and the opening of the cylinder 100, and the straight rod 201d, the first hollow tube 202e and the second hollow tube 203e extend into the limiting cylinder 101a to press against the rubber pad 101b. The first spring 101c provides elastic force to the rubber pad 101b, so that the rubber pad 101 01b is tightly against the straight rod 201d, the first hollow tube 202e and the second hollow tube 203e to prevent the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a from being separated from the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203. After the sand screening operation is completed, open the top cover 101, take out the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203 in turn, and clean out impurities.

[0030] In this embodiment, a plurality of first sieve holes 201f are evenly distributed on the first sieve plate 201b, a plurality of second sieve holes 202f are evenly distributed on the second sieve plate 202b, and a third sieve hole 203f is evenly distributed on the third sieve plate 203b. The diameters of the third sieve hole 203f, the second sieve hole 202f, and the first sieve hole 201f decrease in sequence.

[0031] The used quartz sand is cleaned three times.

[0032] In this embodiment, the bottom end of the annular cooling jacket 301 is connected to the top end of the conical cooling jacket 302 through a water pipe 303. The upper part of the annular cooling jacket 301 is connected to a water inlet pipe 304, and a second opening and closing valve 304a is provided on the water inlet pipe 304. The bottom end of the conical cooling jacket 302 is connected to a water outlet pipe 305, and a third opening and closing valve 305a is provided on the water outlet pipe 305.

[0033] Open the second on-off valve 304a on the water inlet pipe 304, and guide the water from the water inlet pipe 304 to the annular cooling jacket 301 and the conical cooling jacket 302 to absorb heat from the high-temperature quartz sand. If the sand screening operation takes too long, the second on-off valve 304a and the third on-off valve 305a can be opened in the middle to discharge the water after absorbing heat and then introduce cold water again.

[0034] In this embodiment, rotating handles 101d are respectively provided on both sides of the top of the top cover 101, and one side of the top of the top cover 101 is connected to a feed hopper 101e.

[0035] When rotating the top cover 101 , the rotating handle 101 d can be held, and the quartz sand that needs to be cleaned is poured into the cylinder 100 from the feed hopper 101 e.

[0036] In this embodiment, the bottom of the support leg 404 is slidably inserted into the insertion tube 405 , and a second spring 406 is provided between the bottom wall of the insertion tube 405 and the bottom of the support leg 404 .

[0037] The cylinder 100 vibrates under the drive of the vibration motor 402, and the bottom of the support leg 404 slidably inserted into the plug-in cylinder 405 is connected to the second spring 406 to increase the vibration effect, thereby making the sand screening efficiency higher.

[0038] Working principle: Open the second opening and closing valve 304a on the water inlet pipe 304, guide the water from the water inlet pipe 304 to the annular cooling jacket 301 and the conical cooling jacket 302, and install the first sieve plate 201b, the second sieve plate 202b and the third sieve plate 203b in the sand screening mechanism 200 in sequence. First, hold the straight rod 201d in the middle of the first sieve plate 201b, align the two lap plates 204 at the top of the first annular mounting plate 201a and pass them through the first through groove 202c and the second through groove 203c on the second mounting ring 202 and the third mounting ring 203 in sequence until the two lap plates 204 at the top of the first annular mounting plate 201a overlap the top of the first mounting ring 201, and then hold the second sieve plate 201d. The first hollow tube 202e in the middle of the plate 202b is used to make the straight rod 201d in the middle of the first sieve plate 201b pass through the first hollow tube 202e, align the two lap plates 204 at the top of the second annular mounting plate 202a and pass through the second through groove 203c on the third mounting ring 203, then rotate the second annular mounting plate 202a, overlap the two lap plates 204 at the top of the second annular mounting plate 202a on the second mounting ring 202, then hold the second hollow tube 203e, pass the first hollow tube 202e through the second hollow tube 203e, and finally overlap the two lap plates 204 on both sides of the top of the third annular mounting plate 203a on the third mounting ring 203, and then assemble the top cover 101 and the cylinder 10 0 opening is tightened, the straight rod 201d, the first hollow tube 202e and the second hollow tube 203e are extended into the limiting cylinder 101a to press against the rubber pad 101b, and the first spring 101c provides elastic force to the rubber pad 101b, so that the rubber pad 101b is tightly pressed against the ends of the straight rod 201d, the first hollow tube 202e and the second hollow tube 203e, to prevent the first annular mounting plate 201a, the second annular mounting plate 202a, and the third annular mounting plate 203a from being separated from the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203. The quartz sand that needs to be removed is poured into the cylinder 100 from the feed hopper 101e, and the vibration motor 402 is turned on. The moving cylinder 100 vibrates to screen and remove impurities from the quartz sand. The cold water in the annular cooling jacket 301 and the conical cooling jacket 302 can cool the quartz sand in the cylinder 100. After the quartz sand is screened, the quartz sand falling into the conical charging barrel 102 can be continuously churned under the vibration of the vibration motor 402, so that the quartz sand is cooled more evenly and faster by the conical cooling jacket 302. After turning off the vibration motor 402, the first opening and closing valve 102b on the discharge pipe 102a is opened, and the screened quartz sand is collected for recycling. The top cover 101 is opened, and the first mounting ring 201, the second mounting ring 202, and the third mounting ring 203 are taken out in turn and impurities are cleaned out.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A cold sand impurity removal device for casting, characterized by: The invention comprises a hollow cylinder (100), a sand screening mechanism (200), a cooling mechanism (300), and a vibration mechanism (400), wherein the top opening of the cylinder (100) is threadedly connected to a top cover (101), the bottom opening of the cylinder (100) is sealed with a conical charging barrel (102), the bottom end of the conical charging barrel (102) is connected to a discharge pipe (102a), and the discharge pipe (102a) is provided with a first opening and closing valve (102b), the sand screening mechanism (200) comprises a plurality of openings (102a) and a plurality of openings (102b) arranged at intervals from bottom to top. A first mounting ring (201), a second mounting ring (202), and a third mounting ring (203) are placed on the inner wall of the cylinder (100). The first mounting ring (201), the second mounting ring (202), and the third mounting ring (203) have the same size. The top ends of the first mounting ring (201), the second mounting ring (202), and the third mounting ring (203) are movably provided with a first annular mounting plate (201a), a second annular mounting plate (202a), and a third annular mounting plate (203). a), the top diameters of the first annular mounting plate (201a), the second annular mounting plate (202a), and the third annular mounting plate (203a) are larger than the bottom diameters, the bottoms of the first annular mounting plate (201a), the second annular mounting plate (202a), and the third annular mounting plate (203a) are respectively provided with a first sieve plate (201b), a second sieve plate (202b), and a third sieve plate (203b), the vibration mechanism (400) comprises a mounting frame (400) provided on the upper portion of the cylinder (100), 1), a vibration motor (402) is provided on the mounting frame (401), three support plates (403) are provided at equal angles on the bottom of the cylinder (100), and support legs (404) are provided at the bottom ends of the support plates (403), and the cooling mechanism (300) includes an annular cooling jacket (301) provided on the outer wall of the cylinder (100) and a conical cooling jacket (302) provided on the outer wall of the conical charging barrel (102), and the interiors of the annular cooling jacket (301) and the conical cooling jacket (302) are hollow structures.

2. A cold sand impurity removal device for casting according to claim 1, characterized in that: A limiting cylinder (101a) is provided in the middle of the bottom end of the top cover (101), a rubber pad (101b) is movably provided in the limiting cylinder (101a), and a first spring (101c) is fixed between the rubber pad (101b) and the limiting cylinder (101a).

3. A cold sand impurity removal device for casting according to claim 1, characterized in that: Two first through grooves (202c) and two second through grooves (203c) are symmetrically provided on both sides of the inner walls of the second mounting ring (202) and the third mounting ring (203); the top diameters of the first annular mounting plate (201a), the second annular mounting plate (202a), and the third annular mounting plate (203a) are equal to the inner diameters of the first mounting ring (201), the second mounting ring (202), and the third mounting ring (203); two lap plates (204) are symmetrically provided on both sides of the top ends of the first annular mounting plate (201a), the second annular mounting plate (202a), and the third annular mounting plate (203a); the sizes of the lap plates (204) are adapted to the first through groove (202c) and the second through groove (203c).

4. A cold sand impurity removal device for casting according to claim 3, characterized in that: A straight rod (201d) is erected in the middle of the first sieve plate (201b), a first through hole (202d) having a diameter larger than that of the straight rod (201d) is opened in the middle of the second sieve plate (202b), a first hollow tube (202e) is provided at the first through hole (202d), the straight rod (201d) passes through the first hollow tube (202e) and then extends upward to the top opening of the cylinder (100), a second through hole (203d) having a diameter larger than that of the first hollow tube (202e) is provided in the middle of the third sieve plate (203b), a second hollow tube (203e) is provided at the second through hole (203d), the first hollow tube (202e) passes through the second hollow tube (203e) and then extends upward to the top opening of the cylinder (100), and the top of the second hollow tube (203e) extends upward to the top opening of the cylinder (100).

5. The cold sand impurity removal device for casting according to claim 1, characterized in that: The first sieve plate (201b) is evenly distributed with a plurality of first sieve holes (201f), the second sieve plate (202b) is evenly distributed with a plurality of second sieve holes (202f), and the third sieve plate (203b) is evenly distributed with third sieve holes (203f), and the diameters of the third sieve holes (203f), the second sieve holes (202f), and the first sieve holes (201f) decrease in sequence.

6. A cold sand impurity removal device for casting according to claim 1, characterized in that: The bottom end of the annular cooling jacket (301) is connected to the top end of the conical cooling jacket (302) via a water pipe (303); the top of the annular cooling jacket (301) is connected to a water inlet pipe (304); a second opening and closing valve (304a) is provided on the water inlet pipe (304); the bottom end of the conical cooling jacket (302) is connected to a water outlet pipe (305); a third opening and closing valve (305a) is provided on the water outlet pipe (305).

7. A cold sand impurity removal device for casting according to claim 1, characterized in that: Rotating handles (101d) are respectively provided on both sides of the top end of the top cover (101), and one side of the top end of the top cover (101) is connected to a feed hopper (101e).

8. The cold sand impurity removal device for casting according to claim 1, characterized in that: The bottom of the support leg (404) is slidably inserted into the plug-in cylinder (405), and a second spring (406) is provided between the bottom wall of the plug-in cylinder (405) and the bottom of the support leg (404).

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