Foundry sand screening device

Abstract

The utility model discloses a foundry sand screening device, which belongs to the field of foundry sand, comprises a box body, and is characterized in that a plurality of chutes are respectively arranged on the left side wall and the right side wall of an inner cavity of the box body, two screen frames are connected inside the box body in a sliding manner, and the size of screen holes on the upper screen frame is larger than that of screen holes on the lower screen frame. The left side and the right side of the screen frame are fixedly connected with two sliding blocks correspondingly, and the sliding blocks are slidably connected into the adjacent sliding grooves. According to the foundry sand screening device, the screen frame can move up and down in a reciprocating mode, the momentum of foundry sand can be increased when the foundry sand passes through the screen frame, and then the screening effect is improved.

Description

Technical Field

[0001] The utility model belongs to the field of foundry sand, and in particular relates to a foundry sand screening device. Background Art

[0002] Foundry sand is a granular refractory material used to prepare molding sand and core sand in foundry production. When clay is used as a molding sand binder, about 1 ton of new sand is needed to produce 1 ton of qualified castings, so the amount of foundry sand used in sand casting production is the largest.

[0003] During the processing of foundry sand, a vibrating screen is required to be used for screening in order to select foundry sand with a qualified particle size. However, the existing sieve designs for screening foundry sand are relatively traditional, and the contact area between the screen and the sand particles of the foundry sand is small. The efficiency of screening foundry sand is not high and it consumes more electricity to use. Utility Model Content

[0004] In view of one or more of the above defects or improvement requirements in the prior art, the utility model provides a foundry sand screening device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a foundry sand screening device, comprising a box body; a plurality of slide grooves are respectively provided on the left and right side walls of the inner cavity of the box body, two screen frames are slidably connected inside the box body, the screen holes on the upper screen frame are larger than the screen holes on the lower screen frame, two sliders are respectively fixedly connected on the left and right sides of the screen frame, the sliders are slidably connected inside the adjacent slide grooves, a driving assembly is provided on the top of the screen frame, the driving assembly passes through the left and right side walls of the box body, and a transmission assembly is provided on the left side of the box body;

[0006] The driving assembly includes two hinged seats and a crankshaft rod, the two ends of the crankshaft rod respectively penetrate the left and right side walls of the box body and are rotatably connected to the box body, the outer wall of the crankshaft rod is rotatably connected to two crankshaft handles, the bottoms of the two hinged seats are respectively fixedly connected to the middle of the left and right edges of the top of the screen frame, the upper part of the hinged seat is hinged to the bottom end of the connecting rod, the tops of the two connecting rods are respectively hinged to the two crankshaft handles, and the left end of the crankshaft rod is fixedly connected to gear 1;

[0007] The right outer wall of the box is fixedly connected to the servo motor, the output shaft of the servo motor is fixedly connected to the right end of the upper crankshaft rod, the top of the box is connected to the feed rack, the bottom of the box is provided with a discharge port, and the front of the box is hinged with two door panels.

[0008] The transmission assembly includes a transmission rod and a sleeve frame, the sleeve frame is rotatably sleeved on the outer wall of the transmission rod, the right end of the sleeve frame is fixedly connected to the left outer wall of the box body, and the two ends of the transmission rod are respectively fixedly connected with gear two, and the two gear twos are respectively meshed with the two gear one.

[0009] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0010] The foundry sand screening device of the utility model can increase the momentum of the foundry sand when passing through the screen frame by enabling the screen frame to reciprocate up and down, thereby improving the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the box body of the utility model.

[0013] In all the drawings, the same figure marks represent the same technical features, specifically: 1. Box body; 2. Slide; 3. Screen frame; 4. Slider; 5. Drive assembly; 51. Articulated seat; 52. Crank rod; 53. Crank handle; 54. Connecting rod; 55. Gear one; 6. Transmission assembly; 61. Transmission rod; 62. Sleeve; 63. Gear two; 7. Servo motor; 8. Feed rack; 9. Discharge port; 10. Door panel. DETAILED DESCRIPTION

[0014] Depend on Figure 1-2 A foundry sand screening device is provided, comprising a box body 1; a plurality of chutes 2 are respectively provided on the left and right side walls of the inner cavity of the box body 1; two screen frames 3 are slidably connected inside the box body 1; the size of the sieve holes on the upper screen frame 3 is larger than the size of the sieve holes on the lower screen frame 3; two sliders 4 are respectively fixedly connected on the left and right sides of the screen frame 3; the sliders 4 are slidably connected inside the adjacent chutes 2; a driving assembly 5 is provided on the top of the screen frame 3; the driving assembly 5 passes through the left and right side walls of the box body 1; a transmission assembly 6 is provided on the left side of the box body 1;

[0015] The driving assembly 5 includes two hinged seats 51 and a crankshaft rod 52. The two ends of the crankshaft rod 52 respectively penetrate the left and right side walls of the box body 1 and are rotatably connected to the box body 1. The outer wall of the crankshaft rod 52 is rotatably connected to two crank handles 53. The bottoms of the two hinged seats 51 are respectively fixedly connected to the middle of the left and right edges of the top of the screen frame 3. The upper part of the hinged seat 51 is hinged to the bottom end of the connecting rod 54. The tops of the two connecting rods 54 are respectively hinged to the two crank handles 53. The left end of the crankshaft rod 52 is fixedly connected to a gear 1 55.

[0016] The right outer wall of the box body 1 is fixedly connected to the servo motor 7, the output shaft of the servo motor 7 is fixedly connected to the right end of the upper crankshaft rod 52, the top of the box body 1 is connected to the feed rack 8, the bottom of the box body 1 is provided with a discharge port 9, and the front of the box body 1 is hinged with two door panels 10.

[0017] The transmission assembly 6 includes a transmission rod 61 and a sleeve 62. The sleeve 62 is rotatably sleeved on the outer wall of the transmission rod 61. The right end of the sleeve 62 is fixedly connected to the left outer wall of the box body 1. Gear 2 63 is fixedly connected to both ends of the transmission rod 61. The two gears 2 63 are respectively meshed with the two gears 1 55.

[0018] The foundry sand screening device of the utility model is powered on when it is needed to be used, and the servo motor 7 is powered on and first drives the upper crankshaft rod 52 to rotate. During this process, the gear 1 55 rotates accordingly and drives the lower crankshaft rod 52 to rotate through the transmission of the gear 2 63 and the transmission rod 61. When the crankshaft rod 52 rotates, the screen frame 3 can be pulled to perform rapid up and down reciprocating motion through the cooperation between the crank handle 53, the connecting rod 54 and the hinge seat 51, and the screen frame 3 can be limited and guided during this process through the cooperation between the slider 4 and the slide chute 2, and then the external foundry sand can be poured in from the top of the feed frame 8. Under the action of gravity, the foundry sand passes through the screen frame 3 from top to bottom in turn and is screened by the two screen frames 3, and the foundry sand with the smallest particle size is discharged from the discharge port 9. By enabling the screen frame 3 to reciprocate up and down, the momentum of the foundry sand when passing through the screen frame 3 can be increased, thereby improving the screening effect.

Claims

1. A foundry sand screening device, comprising a box (1), characterized in that: A plurality of slide grooves (2) are respectively provided on the left and right side walls of the inner cavity of the box body (1); two sieve frames (3) are slidably connected inside the box body (1); the size of the sieve holes on the upper sieve frame (3) is larger than the size of the sieve holes on the lower sieve frame (3); two sliders (4) are respectively fixedly connected on the left and right sides of the sieve frame (3); the sliders (4) are slidably connected inside adjacent slide grooves (2); a driving assembly (5) is provided on the top of the sieve frame (3); the driving assembly (5) passes through the left and right side walls of the box body (1); and a transmission assembly (6) is provided on the left side of the box body (1); The driving assembly (5) comprises two hinged seats (51) and a crankshaft (52), the two ends of the crankshaft (52) respectively penetrate the left and right side walls of the box body (1) and are rotatably connected to the box body (1), the outer wall of the crankshaft (52) is rotatably connected to two crankshaft handles (53), the bottoms of the two hinged seats (51) are respectively fixedly connected to the middle of the left and right edges of the top of the screen frame (3), the upper part of the hinged seat (51) is hinged to the bottom end of the connecting rod (54), the top ends of the two connecting rods (54) are respectively hinged to the two crankshaft handles (53), and the left end of the crankshaft (52) is fixedly connected to a gear 1 (55); The right outer wall of the box body (1) is fixedly connected to a servo motor (7), the output shaft of the servo motor (7) is fixedly connected to the right end of the upper crankshaft rod (52), the top of the box body (1) is connected to a feed rack (8), the bottom of the box body (1) is provided with a discharge port (9), and the front of the box body (1) is hinged with two door panels (10).

2. The foundry sand screening device according to claim 1, characterized in that: The transmission assembly (6) comprises a transmission rod (61) and a sleeve (62). The sleeve (62) is rotatably sleeved on the outer wall of the transmission rod (61). The right end of the sleeve (62) is fixedly connected to the left outer wall of the box body (1). The two ends of the transmission rod (61) are respectively fixedly connected to the second gear (63). The two second gears (63) are respectively meshed with the two first gears (55).

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