Molding sand screening device for core shooter

Abstract

The utility model discloses a mould sand screening device for a core shooter, which is applied to the technical field of core shooters and is characterized in that a servo motor II is started, a rotating column is driven to rotate through the work of the servo motor II, then a special-shaped plate is driven to rotate, and then a movable column is driven to move; then the other side of a pushing rod rotates on the surface of a second rotating rod, then a positioning column is driven to rotate in an inner cavity of a fixing frame, then a fixing sleeve is driven to rotate, then a supporting rod is driven to rotate, then a positioning rod is driven to move, and then a knocking column is driven to move; and then the effect of cleaning dust on the inner wall of the box body through beating is achieved, and the problem that in the using process of an existing molding sand screening device, due to the fact that a large amount of dust is extremely likely to be generated when a screening plate vibrates, then the dust is extremely likely to be adsorbed to the inner wall of the box body, and therefore cleaning of the screening device by operators is not facilitated is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of core shooting machines, in particular to a mold sand screening device for a core shooting machine. Background Art

[0002] The injection molding machine uses compressed air to evenly inject the molding sand into the sand box for pre-compaction, and then applies pressure for compaction. Commonly used ones include vertical parting boxless injection molding machines and horizontal parting boxless injection molding machines.

[0003] At present, the Chinese utility model with the announcement number CN212396909U discloses a mold sand screening device for a core shooting machine, which includes layer-by-layer screening through a grate plate, a first screen, and a second screen to discharge unqualified mold sand for re-preparation. The qualified mold sand entering the blanking cavity is directly added to the mold sand storage box of the core shooting machine by a screw conveyor in the discharge pipe, which greatly improves the mold sand screening method of the core shooting machine and is suitable for large-scale promotion.

[0004] At present, a mold sand screening device is often required before the core shooting machine is used to make the sand inside the sand box more compact. However, during the use of the existing mold sand screening device, a large amount of dust is easily generated when the screening plate vibrates. The dust is then easily adsorbed on the inner wall of the box, which is not conducive to cleaning by the operator, and is easily contaminated and corroded on the inner wall of the box. Therefore, improvements are proposed to the mold sand screening device. Utility Model Content

[0005] The purpose of the utility model is to provide a molding sand screening device for a core shooting machine, which has the advantage of being more convenient for operators to clean the inner wall of the box and avoid contamination of the inner wall by generated dust.

[0006] The above technical objectives of the present utility model are achieved through the following technical solutions: a mold sand screening device for a core shooting machine, comprising a screening device body, the screening device body comprising a box body, the top of the box body being connected to a feed hopper, the bottom of the box body being connected to a discharge hopper, a screening plate being installed at the bottom of the inner cavity of the box body, and a knocking mechanism being installed on the right side of the box body;

[0007] The knocking mechanism includes servo motor 2, the left side of which is fixedly connected to the right side of the box, the output end of the servo motor 2 passes through the inner cavity of the box and is fixedly connected to a rotating column, the left side of the top of the rotating column is fixedly connected to a special-shaped plate, the left side of the special-shaped plate is fixedly connected to a positioning sleeve, the inner cavity of the positioning sleeve is movably connected to a movable column, the bottom of the movable column is fixedly connected to a push rod, the bottom of the inner cavity of the push rod is movably connected to a positioning column, the top and bottom of the surface of the positioning column are fixedly connected to a fixing sleeve, the left side of the fixing sleeve is fixedly connected to a support rod, the left side of the inner side of the support rod is fixedly connected to the positioning rod, and the middle part of the surface of the positioning rod is fixedly connected to a knocking column.

[0008] The above technical solution is adopted: by starting servo motor 2 to drive the rotating column to rotate, then driving the special-shaped plate to rotate, and then driving the movable column and the push rod to move, and then driving the positioning column to rotate through the action of the push rod, and then driving the support rod and the positioning rod to move, and then driving the knocking column to knock and clean the inner cavity of the box, thereby achieving the effect of cleaning the dust on the inner wall of the box.

[0009] The utility model is further configured such that a fixed frame is fixedly connected to the right side of the inner cavity of the box, the inner cavity of the fixed frame is movably connected to the surface of the rotating column, the top and bottom of the inner cavity of the fixed frame are movably connected to the surface of the positioning column, and the top of the movable column is fixedly connected to a limiting block.

[0010] The above technical solution is adopted: through the setting of the fixed frame, the effect of supporting and positioning the positioning column in the working state is achieved, thereby preventing the positioning column from falling off during the working process; through the setting of the limit block, the effect of limiting the movable column in the working state is achieved, thereby preventing the movable column from falling off from the inner cavity of the positioning sleeve during the working process.

[0011] The utility model is further configured such that the middle of the inner cavity of the positioning column and the bottom of the inner cavity of the push rod are both movably connected with a second rotating rod, the outer side of the second rotating rod is fixedly connected with a limiting plate, and the limiting plate is configured in a circular structure.

[0012] The above technical solution is adopted: through the setting of the rotating rod 2, the push rod can rotate smoothly on the surface of the positioning column, and then drive the positioning column to rotate. Through the setting of the limit plate, the rotating rod 2 in the working state is limited to prevent the rotating rod 2 from falling off from the inner cavity of the positioning column and the push rod during operation.

[0013] The utility model is further configured such that the four corners of the inner cavity of the screening plate are movably connected with guide columns, the outer side of the guide columns is fixedly connected with support plate 2, the surface of support plate 2 is fixedly connected to the inner cavity of the box, the bottom of the guide column surface is sleeved with a spring, the bottom of the spring is fixedly connected to the inner side of support plate 2, and the top of the spring is fixedly connected to the bottom of the screening plate.

[0014] The above technical solution is adopted: by setting the guide column, the screening plate in the vibrating state is guided; by setting the support plate 2, the guide column in the working state is supported and fixed; by setting the spring, when the screening plate moves, the spring will be extended to absorb the force generated; further, when the screening plate loses its force, the spring will restore its deformation, thereby achieving the effect of vibrating and screening the screening plate.

[0015] The utility model is further configured as follows: a servo motor 1 is installed on the left side of the back side of the box body, the output end of the servo motor 1 is fixedly connected to a rotating rod 1, the front side of the rotating rod 1 passes through the inner cavity of the box body and is fixedly connected to a crushing wheel 1, the surface of the rotating rod 1 is fixedly connected to a gear 2, the right side of the gear 2 is meshed with a gear 1, the front side of the gear 1 is fixedly connected to a rotating shaft 1, the front side of the rotating shaft 1 passes through the inner cavity of the box body and is fixedly connected to the crushing wheel 2.

[0016] The above technical solution is adopted: by starting the servo motor 1, the work of the servo motor 1 drives the rotating rod 1 to rotate, and then drives the crushing wheel 1 to rotate. At the same time, the rotation of the rotating rod 1 drives the gear 2 to rotate, and then the gear 1 rotates under the meshing action, and then drives the rotating shaft 1 to rotate, and then drives the crushing wheel 2 to rotate, and then the rotation of the crushing wheel 1 and the crushing wheel 2 drives the support shaft to rotate, thereby achieving the effect of crushing the incoming mold sand.

[0017] The utility model is further configured such that the front sides of the crushing wheel 1 and the crushing wheel 2 are fixedly connected to a support shaft, the front sides of the support shafts are movably connected to the inner cavity of the box, the back side of the servo motor 1 is fixedly connected to a support plate 1, and the right side of the support plate 1 is fixedly connected to the left side of the box.

[0018] The above technical solution is adopted: by setting the support shaft, the crushing wheel 1 and the crushing wheel 2 in the working state are supported to prevent the crushing wheel 1 and the crushing wheel 2 from falling off during the rotation state; by setting the servo motor 1, the servo motor 1 in the working state is supported and fixed to prevent the servo motor 1 from shaking during the operation.

[0019] The present invention is further configured as follows: a vibration mechanism is installed on the back side of the box body, and the vibration mechanism includes roller one, the inner cavity of roller one is fixedly connected to the surface of rotating rod one, the surface of roller one is movably connected to a belt, the bottom of the inner cavity of the belt is movably connected to roller two, the front side of roller two is fixedly connected to rotating shaft two, the front side of rotating shaft two passes through the inner cavity of the box body and is movably connected to the front side of the inner cavity of the box body, the front and back sides of the surface of rotating shaft two are fixedly connected to cam wheels, and the top of the cam wheel is movably connected to the bottom of the screening plate.

[0020] The above technical solution is adopted: the rotation of the rotating rod 1 drives the roller 1 to rotate, and then drives the belt to move, and then drives the roller 2 to rotate, and then drives the rotating shaft 2 to rotate, and then drives the cam wheel to rotate, so that when the cam wheel is in a vertical state, the screening plate moves upward, and then when the cam wheel is in a horizontal state, the screening plate moves downward, thereby achieving the effect of vibrating and screening the mold sand inside the screening plate.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. By starting servo motor 2, the work of servo motor 2 drives the rotating column to rotate, and then drives the special-shaped plate to rotate, and then drives the movable column to move, and then drives the push rod to move, and then makes the other side of the push rod rotate on the surface of rotating rod 2, and then drives the positioning column to rotate in the inner cavity of the fixed frame, and then drives the fixed sleeve to rotate, and then drives the support rod to rotate, and then drives the positioning rod to move, and then drives the knocking column to move, and then when the support rod is at a certain tilt angle, the knocking column cleans the inner wall of the box, and then achieves the effect of cleaning the dust on the inner wall of the box by knocking, which solves the problem that the existing mold sand screening device is very likely to generate a lot of dust during use, and then the dust is very easily adsorbed on the inner wall of the box, which is not conducive to the operator to clean it, and then it is very easy to cause pollution and corrosion to the inner wall of the box.

[0023] 2. Through the setting of the rotating rod 2, the push rod can smoothly rotate on the surface of the positioning column, and then drive the positioning column to rotate. Through the setting of the limit plate, the rotating rod 2 in the working state is limited to prevent the rotating rod 2 from falling off from the inner cavity of the positioning column and the push rod during the working process. Through the setting of the support shaft, the crushing wheel 1 and the crushing wheel 2 in the working state are supported to avoid the crushing wheel 1 and the crushing wheel 2 falling off in the rotating state. Through the setting of the servo motor 1, the servo motor 1 in the working state is supported and fixed to prevent the servo motor 1 from shaking during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a bottom view of the box body of the utility model;

[0026] Figure 3 It is a cross-sectional view of the box body of the utility model;

[0027] Figure 4 This is a schematic diagram of the structural connection of the support plate of the present invention;

[0028] Figure 5 This is a schematic diagram of the structural connection of the cam wheel of the present utility model;

[0029] Figure 6 This is a schematic diagram of the structural connection of the knock column of the utility model;

[0030] Figure 7 This utility model Figure 6 A local enlarged schematic diagram of point A in the middle.

[0031] Figure 1: Screening device body; 101: Box; 102: Servo motor 1; 103: Feed hopper; 104: Discharge hopper; 105: Support plate 1; 106: Gear 1; 107: Crushing wheel 1; 108: Support shaft; 109: Screening plate; 110: Support plate 2; 111: Guide column; 112: Spring; 113: Crushing wheel 2; 114: Rotating shaft 1; 115: Gear 2; 116: Rotating rod 1; 2: Beating mechanism; 201: Servo Motor 2; 202, rotating column; 203, limiting plate; 204, rotating rod 2; 205, positioning column; 206, positioning rod; 207, knocking column; 208, supporting rod; 209, fixing sleeve; 210, fixing frame; 211, special-shaped plate; 212, positioning sleeve; 213, limiting block; 214, movable column; 215, pushing rod; 3, vibration mechanism; 301, roller 1; 302, belt; 303, roller 2; 304, rotating shaft 2; 305, cam wheel. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Example 1:

[0034] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7A mold sand screening device for a core shooting machine includes a screening device body 1, the screening device body 1 includes a box body 101, the top of the box body 101 is connected to a feed hopper 103, the bottom of the box body 101 is connected to a discharge hopper 104, a screening plate 109 is installed at the bottom of the inner cavity of the box body 101, and a knocking mechanism 2 is installed on the right side of the box body 101;

[0035] The knocking mechanism 2 includes a servo motor 201. The left side of the servo motor 201 is fixedly connected to the right side of the box body 101. The output end of the servo motor 201 passes through the inner cavity of the box body 101 and is fixedly connected to a rotating column 202. The left side of the top of the rotating column 202 is fixedly connected to a special-shaped plate 211. The left side of the special-shaped plate 211 is fixedly connected to a positioning sleeve 212. The inner cavity of the positioning sleeve 212 is movably connected to a movable column 214. The bottom of the movable column 214 is fixedly connected to a push rod 215. The bottom of the inner cavity of the push rod 215 is movably connected to a positioning column 205. The top and bottom of the surface of the positioning column 205 are fixedly connected to a fixing sleeve 209. The left side of the fixing sleeve 209 is fixedly connected to a support rod 208. The left side of the inner side of the support rod 208 is fixedly connected to a positioning rod 206. The middle part of the surface of the positioning rod 206 is fixedly connected to a knocking column 207.

[0036] Furthermore, a fixed frame 210 is fixedly connected to the right side of the inner cavity of the box body 101, and the inner cavity of the fixed frame 210 is movably connected to the surface of the rotating column 202. The top and bottom of the inner cavity of the fixed frame 210 are movably connected to the surface of the positioning column 205. The top of the movable column 214 is fixedly connected to the limiting block 213. Through the setting of the fixed frame 210, the positioning column 205 in the working state is supported and positioned, and the positioning column 205 is prevented from falling off during the working process. Through the setting of the limiting block 213, the movable column 214 in the working state is limited, and the movable column 214 is prevented from falling off from the inner cavity of the positioning sleeve 212 during the working process.

[0037] Furthermore, the middle of the inner cavity of the positioning column 205 and the bottom of the inner cavity of the pushing rod 215 are movably connected with the rotating rod 204, and the outer side of the rotating rod 204 is fixedly connected to the limiting plate 203. The limiting plate 203 is arranged in a circular structure. Through the setting of the rotating rod 204, the pushing rod 215 can smoothly rotate on the surface of the positioning column 205, and then drive the positioning column 205 to rotate. Through the setting of the limiting plate 203, the effect of limiting the rotating rod 204 in the working state is achieved, preventing the rotating rod 204 from falling off from the inner cavity of the positioning column 205 and the pushing rod 215 during operation.

[0038] Furthermore, the four corners of the inner cavity of the screening plate 109 are movably connected with guide columns 111, and the outer side of the guide column 111 is fixedly connected to the support plate 2 110. The surface of the support plate 2 110 is fixedly connected to the inner cavity of the box body 101, and the bottom of the guide column 111 surface is sleeved with a spring 112, the bottom of the spring 112 is fixedly connected to the inner side of the support plate 2 110, and the top of the spring 112 is fixedly connected to the bottom of the screening plate 109. Through the setting of the guide column 111, the screening plate 109 in the vibrating state is guided. Through the setting of the support plate 2 110, the guide column 111 in the working state is supported and fixed. Through the setting of the spring 112, when the screening plate 109 moves, the spring 112 is extended, thereby absorbing the energy of the generated force. Further, when the screening plate 109 loses its strength, the spring 112 is restored to its deformation, thereby achieving the effect of vibrating and screening the screening plate 109.

[0039] Furthermore, a servo motor 102 is installed on the left side of the back side of the box body 101, and the output end of the servo motor 102 is fixedly connected to a rotating rod 116. The front side of the rotating rod 116 penetrates the inner cavity of the box body 101 and is fixedly connected to a crushing wheel 107. The surface of the rotating rod 116 is fixedly connected to a gear 2 115. The right side of the gear 2 115 is meshed with the gear 106. The front side of the gear 106 is fixedly connected to a rotating shaft 114. The front side of the rotating shaft 114 penetrates the inner cavity of the box body 101 and is fixedly connected to the crushing wheel 2 113. The servo motor 102 is driven, and the operation of the servo motor 102 drives the rotating rod 116 to rotate, and then drives the crushing wheel 107 to rotate. At the same time, the rotation of the rotating rod 116 drives the gear 2 115 to rotate, and then the gear 106 is rotated under the meshing action, and then drives the rotating shaft 114 to rotate, and then drives the crushing wheel 2 113 to rotate, and then the rotation of the crushing wheel 107 and the crushing wheel 2 113 drives the support shaft 108 to rotate, thereby achieving the effect of crushing the entering mold sand.

[0040] Furthermore, the front sides of the crushing wheels 107 and 113 are fixedly connected to the support shaft 108, the front sides of the support shaft 108 are movably connected to the inner cavity of the box body 101, the back side of the servo motor 102 is fixedly connected to the support plate 105, and the right side of the support plate 105 is fixedly connected to the left side of the box body 101. Through the setting of the support shaft 108, the crushing wheels 107 and 113 in the working state are supported to prevent the crushing wheels 107 and 113 from falling off during the rotation state. Through the setting of the servo motor 102, the servo motor 102 in the working state is supported and fixed to prevent the servo motor 102 from shaking during operation.

[0041] The use process is briefly described as follows: by starting the servo motor 102, the work of the servo motor 102 drives the rotating rod 116 to rotate, and then drives the crushing wheel 107 to rotate. At the same time, the rotation of the rotating rod 116 drives the gear 2 115 to rotate, and then the gear 106 is rotated under the meshing action, and then the rotating shaft 114 is driven to rotate, and then the crushing wheel 2 113 is driven to rotate, and then the rotation of the crushing wheel 107 and the crushing wheel 2 113 drives the support shaft 108 to rotate, thereby achieving the effect of crushing the incoming mold sand, and then the operator manually pours the mold sand into the inner cavity of the box body 101 through the feed hopper 103, and then it is crushed by the crushing wheel 107 and the crushing wheel 2 113, and then reaches the inner cavity of the screen plate 109, and then the vibration of the screen plate 109 makes the screen plate 109 move on the surface of the guide column 111, and then realizes The effect of screening the mold sand is now achieved, and the mold sand after screening is discharged through the discharge hopper 104. Subsequently, when the mold sand screening is completed, the servo motor 201 is started, and the work of the servo motor 201 drives the rotating column 202 to rotate, and then drives the special-shaped plate 211 to rotate, and then drives the movable column 214 to move, and then drives the pushing rod 215 to move, and then makes the other side of the pushing rod 215 rotate on the surface of the rotating rod 204, and then drives the positioning column 205 to rotate in the inner cavity of the fixed frame 210, and then drives the fixing sleeve 209 to rotate, and then drives the support rod 208 to rotate, and then drives the positioning rod 206 to move, and then drives the knocking column 207 to move, and then when the support rod 208 is at a certain tilt angle, the knocking column 207 cleans the inner wall of the box body 101, and then achieves the effect of cleaning the dust on the inner wall of the box body 101 by knocking.

[0042] Example 2:

[0043] refer to Figure 2 and Figure 5A sand screening device for a core shooting machine, a vibration mechanism 3 is installed on the back side of the box body 101, the vibration mechanism 3 includes a roller 1 301, the inner cavity of the roller 1 301 is fixedly connected to the surface of the rotating rod 116, the surface of the roller 1 301 is movably connected to a belt 302, the bottom of the inner cavity of the belt 302 is movably connected to a roller 2 303, the front side of the roller 2 303 is fixedly connected to a rotating shaft 2 304, the front side of the rotating shaft 2 304 passes through the inner cavity of the box body 101 and is movably connected to the front side of the inner cavity of the box body 101, the front and back sides of the surface of the rotating shaft 2 304 are fixedly connected to convex Wheel 305, the top of the cam wheel 305 is movably connected to the bottom of the screening plate 109, and the rotation of the rotating rod 116 drives the roller 1 301 to rotate, and then drives the belt 302 to move, and then drives the roller 2 303 to rotate, and then drives the rotating shaft 2 304 to rotate, and then drives the cam wheel 305 to rotate, so that when the cam wheel 305 is in a vertical state, the screening plate 109 moves upward, and then when the cam wheel 305 is in a horizontal state, the screening plate 109 moves downward, thereby achieving the effect of vibrating and screening the mold sand inside the screening plate 109.

[0044] Brief description of the usage process: The rotation of the rotating rod 116 drives the roller 1 301 to rotate, and then drives the belt 302 to move, and then drives the roller 2 303 to rotate, and then drives the rotating shaft 2 304 to rotate, and then drives the cam wheel 305 to rotate, so that when the cam wheel 305 is in a vertical state, the screening plate 109 moves upward, and then when the cam wheel 305 is in a horizontal state, the screening plate 109 moves downward, thereby achieving the effect of vibrating and screening the mold sand inside the screening plate 109.

[0045] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A mold sand screening device for a core shooting machine, comprising a screening device body (1), characterized in that: The screening device body (1) comprises a box (101), the top of the box (101) is connected to an inlet hopper (103), the bottom of the box (101) is connected to an outlet hopper (104), a screening plate (109) is installed at the bottom of the inner cavity of the box (101), and a knocking mechanism (2) is installed on the right side of the box (101); The knocking mechanism (2) comprises a second servo motor (201), the left side of the second servo motor (201) is fixedly connected to the right side of the box (101), the output end of the second servo motor (201) passes through the inner cavity of the box (101) and is fixedly connected to a rotating column (202), the left side of the top of the rotating column (202) is fixedly connected to a special-shaped plate (211), the left side of the special-shaped plate (211) is fixedly connected to a positioning sleeve (212), and the inner cavity of the positioning sleeve (212) is movably connected to the movable column (211). 4), the bottom of the movable column (214) is fixedly connected to a push rod (215), the bottom of the inner cavity of the push rod (215) is movably connected to a positioning column (205), the top and bottom of the surface of the positioning column (205) are fixedly connected to a fixing sleeve (209), the left side of the fixing sleeve (209) is fixedly connected to a support rod (208), the left side of the inner side of the support rod (208) is fixedly connected to a positioning rod (206), and the middle part of the surface of the positioning rod (206) is fixedly connected to a knocking column (207).

2. The mold sand screening device for a core shooting machine according to claim 1, characterized in that: A fixed frame (210) is fixedly connected to the right side of the inner cavity of the box body (101); the inner cavity of the fixed frame (210) is movably connected to the surface of the rotating column (202); the top and bottom of the inner cavity of the fixed frame (210) are movably connected to the surface of the positioning column (205); and the top of the movable column (214) is fixedly connected to the limiting block (213).

3. The mold sand screening device for a core shooting machine according to claim 1, characterized in that: The middle of the inner cavity of the positioning column (205) and the bottom of the inner cavity of the pushing rod (215) are both movably connected to the second rotating rod (204), and the outer side of the second rotating rod (204) is fixedly connected to the limiting plate (203), and the limiting plate (203) is arranged in a circular structure.

4. The mold sand screening device for a core shooting machine according to claim 1, characterized in that: The four corners of the inner cavity of the screening plate (109) are movably connected to guide columns (111), the outer side of the guide columns (111) is fixedly connected to a second support plate (110), the surface of the second support plate (110) is fixedly connected to the inner cavity of the box body (101), the bottom of the surface of the guide columns (111) is sleeved with a spring (112), the bottom of the spring (112) is fixedly connected to the inner side of the second support plate (110), and the top of the spring (112) is fixedly connected to the bottom of the screening plate (109).

5. The mold sand screening device for a core shooting machine according to claim 1, characterized in that: A servo motor 1 (102) is installed on the left side of the back side of the box body (101); the output end of the servo motor 1 (102) is fixedly connected to a rotating rod 1 (116); the front side of the rotating rod 1 (116) penetrates into the inner cavity of the box body (101) and is fixedly connected to a crushing wheel 1 (107); the surface of the rotating rod 1 (116) is fixedly connected to a gear 2 (115); the right side of the gear 2 (115) is meshedly connected to the gear 1 (106); the front side of the gear 1 (106) is fixedly connected to a rotating shaft 1 (114); the front side of the rotating shaft 1 (114) penetrates into the inner cavity of the box body (101) and is fixedly connected to a crushing wheel 2 (113).

6. The mold sand screening device for a core shooting machine according to claim 5, characterized in that: The front sides of the crushing wheel 1 (107) and the crushing wheel 2 (113) are fixedly connected to a support shaft (108), and the front side of the support shaft (108) is movably connected to the inner cavity of the box body (101). The back side of the servo motor 1 (102) is fixedly connected to a support plate 1 (105), and the right side of the support plate 1 (105) is fixedly connected to the left side of the box body (101).

7. The mold sand screening device for a core shooting machine according to claim 1, characterized in that: A vibration mechanism (3) is installed on the back side of the box body (101), and the vibration mechanism (3) includes a roller 1 (301), the inner cavity of the roller 1 (301) is fixedly connected to the surface of the rotating rod 1 (116), the surface of the roller 1 (301) is movably connected to a belt (302), the bottom of the inner cavity of the belt (302) is movably connected to a roller 2 (303), the front side of the roller 2 (303) is fixedly connected to a rotating shaft 2 (304), the front side of the rotating shaft 2 (304) passes through the inner cavity of the box body (101) and is movably connected to the front side of the inner cavity of the box body (101), the front side and the back side of the surface of the rotating shaft 2 (304) are fixedly connected to a cam wheel (305), and the top of the cam wheel (305) is movably connected to the bottom of the screening plate (109).

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