Screening device for casting sand

Abstract

The casting sand screening device comprises a screening box, a splitter plate, a discharge port, screening layers, spring feet and a vibration motor, the spring feet are connected to the bottom of the screening box, the vibration motor is installed on the screening box, the screening layers are sequentially arranged in the screening box from top to bottom, the spring feet are connected to the bottom of the screening box, and the vibration motor is installed on the screening box. The adjacent screening layers are connected together, the splitter plate is arranged in one end of the screening box and connected with the highest screening layer, and the multiple discharging ports are connected to the screening box away from the splitter plate and connected with the corresponding screening layers; the screening layer comprises separation screen pressing plates, a screen, a mounting plate and a back-and-forth beating device, and the multiple separation screen pressing plates are evenly mounted in the screening box; the sand screening device for the casting is simple in structure, convenient to use and practical, reverse contact vibration is provided for the screening layer through the back-and-forth beating device so as to reduce the phenomenon that screen holes are blocked, and the working efficiency of the screen is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand screening, and particularly relates to a sand screening device for castings. Background Art

[0002] For castings, the well-shaped model is mainly placed in a sand box for shaping and casting. After casting, the casting is separated from the sand, and then subsequent processes such as inspection, cutting of the runner, grinding, welding repair, and heat treatment are carried out. After the sand is separated, iron removal and screening are required; the main components of the sand used for the casting model are silica sand, quartz powder, and clay, and the auxiliary components include asphalt, coal powder, hardener, and water, etc. During screening, the fine sieve holes are easily blocked by the auxiliary components. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a sand screening device for castings, which has a simple structure, is convenient and practical, provides a reverse contact vibration to the screening layer through a reciprocating striker to reduce the phenomenon of sieve hole blockage, and achieves ensuring the working efficiency of the sieve mesh.

[0004] A sand screening device for castings includes a screening box, a diversion plate, a discharge port, a screening layer, spring feet, and a vibration motor. Several spring feet are connected to the bottom of the screening box, the vibration motor is installed on the screening box, several screening layers are arranged in the screening box from top to bottom in sequence, the adjacent screening layers are connected together, the diversion plate is arranged inside one end of the screening box and is connected to the highest screening layer, several discharge ports are connected to the screening box far from the diversion plate and are connected to the corresponding screening layers; the screening layer includes a partition sieve mesh pressing plate, a sieve mesh, a mounting plate, and a reciprocating striker. Several partition sieve mesh pressing plates are evenly installed in the screening box, mounting grooves for installing the mounting plates are evenly opened on the partition sieve mesh pressing plates, the sieve mesh is installed on the inner wall of the screening box and is laid flat on several partition sieve mesh pressing plates, and several arc-shaped height limiting bars for restricting the position of the reciprocating striker are connected to the mounting plate.

[0005] Preferably, the reciprocating striker includes a connecting pipe and at least one striking pipe, and the adjacent striking pipes are connected through the connecting pipe. Several striking balls are connected to the striking pipe.

[0006] Preferably, a sound reduction ring is sleeved on the connecting pipe, and limiting side plates are connected to both ends of the sound reduction ring.

[0007] Preferably, several arc-shaped grooves are opened on the mounting plate, and the connecting pipe is arranged in the arc-shaped grooves.

[0008] Preferably, the partition sieve mesh pressing plates of the adjacent screening layers are closely attached together and press the sieve mesh tightly.

[0009] Preferably, the connecting pipe, the striking balls, and the limiting side plates are all made of silica gel material.

[0010] Beneficial effects:

[0011] (1) A sand screening device for castings of the present utility model has a simple structure and is convenient and practical. By providing a reverse contact vibration to the screening layer through a reciprocating striker, the phenomenon of screen hole blockage is reduced, ensuring the working efficiency of the screen.

[0012] (2) A sand screening device for castings of the present utility model controls the vibration height of the reciprocating striker through an arc-shaped height limiting bar, so as to control the contact area between the reciprocating striker and the screen, avoiding deformation of the screen caused by excessive contact between the reciprocating striker and the screen. Description of the drawings

[0013] Figure 1 It is a schematic internal structure diagram of the sand screening device;

[0014] Figure 2 It is a schematic top view structure diagram of the sand screening device;

[0015] Figure 3 It is a schematic structure diagram of the screen being pressed;

[0016] Figure 4 It is a schematic structure diagram of the reciprocating striker;

[0017] Figure 5 It is a schematic structure diagram of the arc-shaped height limiting bar;

[0018] 1 - Screening box, 2 - Shunt plate, 3 - Discharge port, 4 - Screening layer, 41 - Partition screen pressing plate, 42 - Screen, 43 - Installation groove, 44 - Installation plate, 45 - Reciprocating striker, 46 - Arc-shaped height limiting bar, 47 - Connecting pipe, 48 - Striking pipe, 49 - Striking ball, 410 - Sound reduction ring, 411 - Limit side plate, 412 - Arc-shaped groove. Specific embodiments

[0019] The embodiments of the present utility model will be further described below with reference to the drawings.

[0020] Embodiment 1

[0021] As Figures 1 to 5As shown in the figure; a sand screening device for castings, comprising a screening box 1, a diversion plate 2, a discharge port 3, a screening layer 4, spring feet and a vibration motor. A plurality of the spring feet are connected to the bottom of the screening box 1, the vibration motor is installed on the screening box 1, and a plurality of the screening layers 4 are sequentially arranged in the screening box 1 from top to bottom. The adjacent screening layers 4 are connected together. The diversion plate 2 is arranged inside one end of the screening box 1 and is connected to the highest screening layer 4. A plurality of the discharge ports 3 are connected to the screening box 1 away from the diversion plate 2 and are connected to the corresponding screening layers 4. The screening layer 4 includes a partition screen pressing plate 41, a screen 42, a mounting plate 44 and a reciprocating striker 45. A plurality of the partition screen pressing plates 41 are evenly installed in the screening box 1. Mounting grooves 43 for mounting the mounting plate 44 are evenly formed in the partition screen pressing plate 41. The screen 42 is installed on the inner wall of the screening box 1 and is laid flat on a plurality of the partition screen pressing plates 41. A plurality of arc-shaped height limiting bars 46 for restricting the position of the reciprocating striker 45 are connected to the mounting plate 44. The reciprocating striker 45 includes a connecting pipe 47 and at least three striking pipes 48. The adjacent striking pipes 48 are connected by the connecting pipe 47. A plurality of striking balls 49 are connected to the striking pipe 48. A sound reduction ring 410 is sleeved on the connecting pipe 47. Both ends of the sound reduction ring 410 are connected with limiting side plates 411. A plurality of arc-shaped grooves 412 are formed in the mounting plate 44. The connecting pipe 47 is arranged in the arc-shaped grooves 412. The partition screen pressing plates 41 of the adjacent screening layers 4 are closely attached together and press the screen 42. The connecting pipe 47, the striking balls 49 and the limiting side plates 411 are all made of silica gel material.

[0022] The recycled casting sand is conveyed to the diverter plate 2 through a belt conveyor. At the same time, the vibration motor is turned on to make the screening box 1 vibrate. Through vibration, the recycled sand moves onto the screening layer 4 and is screened layer by layer from high to low through the screening layer 4, so as to separate sands, sundries, and auxiliary materials with different particle sizes, facilitating subsequent remixing and adding new auxiliary materials or main material sand. When the screening layer 4 is working, the recycled sand enters the screen of the screening layer 4. The screen 42 is pressed by the adjacent partition screen pressing plate 41, so that the overall plane of the screen 42 is divided into several small planes, ensuring an increase in the local bearing capacity of the screen 42 and reducing the frequency of deformation of the screen 42, avoiding the situation where the recycled sand is concentrated in one area during filtration, resulting in deformation of the screen 42 and easy blockage of the filter holes, thereby reducing the filtration efficiency. When the screening box 1 vibrates, it synchronously drives the partition screen pressing plate 41 and the mounting plate 44. Then, when the mounting plate 44 vibrates, the reciprocating striker 45 thereon contacts the screen 42 due to vibration, causing the sand and auxiliary materials blocked in the holes of the screen 42 to quickly escape. The height of the vibration of the connecting pipe 47 is restricted by the arc height limiting strip 46, so that the contact area of the striking ball 49 with the screen 42 is controlled. At the same time, it is ensured that the striking ball 49 impacts on the screen 42 to reduce the frequency of screen blockage. Two connecting pipes 47 are provided to ensure the overall balance of the reciprocating striker 45 during vibration. The sound reduction ring 410 is provided so that the connecting pipe 47 does not produce excessive noise when vibrating between the arc groove 412 and the arc height limiting strip 46. The movement range of the connecting pipe 47 is restricted by the two limit side plates 411.

[0023] The specific embodiments of the present invention have been described in detail above, but they are only examples, and the present invention is not limited to the above-described specific embodiments. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, equivalent transformations and modifications made without departing from the spirit and scope of the present invention are all covered by the present invention.

Claims

1. A sand screening device for castings, characterized in that: It includes a screening box (1), a diversion plate (2), a discharge port (3), a screening layer (4), spring feet and a vibration motor. A number of the spring feet are connected to the bottom of the screening box (1), the vibration motor is installed on the screening box (1), a number of the screening layers (4) are sequentially arranged in the screening box (1) from top to bottom, the adjacent screening layers (4) are connected together, the diversion plate (2) is arranged inside one end of the screening box (1) and is connected to the highest screening layer (4), and a number of the discharge ports (3) are connected to the screening box (1) away from the diversion plate (2) and are connected to the corresponding screening layer (4); the screening layer (4) includes a partition screen pressing plate (41), a screen (42), a mounting plate (44) and a reciprocating striker (45). A number of the partition screen pressing plates (41) are evenly installed in the screening box (1), mounting grooves (43) for mounting the mounting plate (44) are evenly formed in the partition screen pressing plate (41), the screen (42) is installed on the inner wall of the screening box (1) and is laid flat on a number of the partition screen pressing plates (41), and a number of arc-shaped height limiting bars (46) for restricting the position of the reciprocating striker (45) are connected to the mounting plate (44).

2. The sand screening device for castings according to claim 1, characterized in that: The reciprocating striker (45) includes a connecting pipe (47) and at least 3 striking pipes (48), the adjacent striking pipes (48) are connected through the connecting pipe (47), and a number of striking balls (49) are connected to the striking pipe (48).

3. The sand screening device for castings according to claim 2, characterized in that: A sound reduction ring (410) is sleeved on the connecting pipe (47), and limiting side plates (411) are connected to both ends of the sound reduction ring (410).

4. The sand screening device for a casting as described in claim 3, characterized in that: A number of arc-shaped grooves (412) are formed in the mounting plate (44), and the connecting pipe (47) is arranged in the arc-shaped grooves (412).

5. The sand screening device for a casting as described in claim 4, characterized in that: The partition screen pressing plates (41) of the adjacent screening layers (4) are closely attached together and press the screen (42).

6. The sand screening device for a casting as described in claim 5, wherein: The connecting pipe (47), the striking balls (49) and the limiting side plates (411) are all made of silica gel material.

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