A silicon carbide screening device for abrasive paper production

Abstract

The application discloses a silicon carbide screening device for abrasive paper production and belongs to the technical field of abrasive paper production equipment, which comprises a base, a feeding mechanism, a screening mechanism, a driving mechanism and a material collecting mechanism, wherein the screening mechanism comprises a circular sieve frame and a sieve screen fixedly installed in the circular sieve frame, an annular frame is fixedly installed on the top of the base, a fixing ring is fixedly installed on the outer side of the circular sieve frame, and a plurality of connecting springs are fixedly installed between the annular frame and the fixing ring; the feeding mechanism comprises a feeding hopper, a driving motor, a mounting box and two rotating shafts, and the mounting box is fixedly installed at the bottom of the feeding hopper. The feeding mechanism can realize uniform distribution and efficient scattering of the silicon carbide material, so that the silicon carbide is uniformly distributed on the sieve screen, the screening rate is improved, the feeding rate can be automatically adjusted according to the stock and the degree of agglomeration of the silicon carbide on the sieve screen, and the discharging rate is monitored in cooperation with the material collecting mechanism, so that the stable screening rate can be maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sandpaper production equipment, and particularly relates to a silicon carbide screening device for sandpaper production. BACKGROUND

[0002] According to different grinding materials, there are many kinds of sandpaper such as diamond sandpaper, artificial diamond sandpaper and glass sandpaper. Dry sandpaper is used for polishing the surface of wood and bamboo, and water-resistant sandpaper is used for polishing the surface of metal or non-metal workpieces in water or oil. The base paper is entirely made of unbleached kraft wood pulp, and has strong paper quality, wear resistance, folding resistance and good water resistance. The grinding material such as glass sand is adhered to the base paper by using a gum adhesive, and then dried to form the sandpaper. In the production process, the silicon carbide raw material needs to be ground and screened, and then the ground and screened silicon carbide particles are adhered to the sandpaper by using an adhesive.

[0003] Generally, the silicon carbide for sandpaper production is screened by using a conventional screening device. The screening parameters cannot be adjusted according to the agglomeration degree of the silicon carbide and the actual screening situation, which easily causes the silicon carbide to block the screen and affects the screening efficiency. Therefore, the present application provides a silicon carbide screening device for sandpaper production to solve the above problems. SUMMARY

[0004] The present application aims to provide a silicon carbide screening device for sandpaper production to solve the problems in the background.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A silicon carbide screening device for sandpaper production, comprising a base, a feeding mechanism, a screening mechanism, a driving mechanism and a material collecting mechanism. The screening mechanism comprises a circular screen frame and a screen fixedly installed in the circular screen frame. The top of the base is fixedly installed with an annular frame. The outer side of the circular screen frame is fixedly installed with a fixed ring. A plurality of connecting springs are fixedly installed between the annular frame and the fixed ring.

[0007] The feeding mechanism comprises a feeding hopper, a driving motor, a mounting box and two rotating shafts. The mounting box is fixedly installed at the bottom of the feeding hopper. The rotating shafts are rotatably installed in the mounting box. A plurality of stirring blades are fixedly installed on the outer side of the rotating shafts. A transmission gear is fixedly installed at one end of the rotating shaft. A driving shaft is fixedly installed on the output shaft of the driving motor. The bottom end of the driving shaft extends into the mounting box and is fixedly installed with a rotating column. A plurality of spiral strips are integrally formed on the outer side of the rotating column. A sliding plate is slidingly installed in the mounting box. A circular hole adapted to the rotating column is formed in the top of the sliding plate. Spiral grooves adapted to the spiral strips are formed in the inner wall of the circular hole.

[0008] Preferably, both sides of the circular screen frame are fixedly installed with L-shaped support plates, the top of the L-shaped support plate is fixedly installed with an arc-shaped track, the bottom of the two arc-shaped tracks is fixedly installed with the same annular rack, the transmission gear is meshed with the annular rack, the top of the two arc-shaped tracks is fixedly installed with the same U-shaped frame, the driving motor is fixedly installed on the front side of the U-shaped frame, both sides of the feeding hopper are fixedly installed with L-shaped support rods, the other ends of the two L-shaped support rods are fixedly installed with the same rotating ring, the rotating shaft is rotatably installed in the rotating ring, and the rotating ring is slidably sleeved on the outside of the arc-shaped track.

[0009] Preferably, the bottom of the sliding plate is fixedly installed with a support spring and a damper, the bottom ends of the support spring and the damper are fixedly installed on the inner wall of the bottom of the mounting box, a guide column is fixedly installed in the mounting box, the sliding plate is slidably sleeved on the outside of the guide column, the rotating column is rotatably installed in the mounting box, two inclined holes are formed in the front and rear sides of the mounting box, an inclined plate is slidably installed in the inclined hole, the top of the inclined plate is fixedly installed with a baffle, a square plate is fixedly installed on the side of the inclined plate close to the rotating column, two square grooves are formed in the front and rear sides of the sliding plate, and the square plate is slidably installed in the corresponding square groove.

[0010] The front and rear sides of the mounting box are fixedly installed with V-shaped plates, and the inclined plate is slidably sleeved on the outside of the corresponding V-shaped plate.

[0011] The feeding hopper comprises a circular funnel, a multi-branch guide pipe and a plurality of conical discharge frames, the multi-branch guide pipe is communicated with the bottom end of the circular funnel, the conical discharge frame is communicated below the multi-branch guide pipe, the baffle is movably abutted on the bottom of the conical discharge frame, and the bottom of the conical discharge frame is provided with a discharge port.

[0012] Preferably, the driving mechanism comprises a rotating motor, a rotating arm, a rotating box and an inner tooth ring, the inner tooth ring is fixedly installed in the inside of the annular frame, the top of the base is fixedly installed with a fixed column, the rotating arm is rotatably sleeved on the outside of the fixed column, the bottom of the rotating arm is fixedly installed with a driven gear, the rotating motor is fixedly installed on the bottom of the base, a driving gear is fixedly installed on the output shaft of the rotating motor, the driving gear is meshed with the driven gear, and the rotating box is fixedly installed at one end of the rotating arm.

[0013] Preferably, the inside of the rotating box is rotatably provided with a horizontal shaft and a vertical shaft, the vertical shaft is fixedly provided with a pinion and a large bevel gear, the pinion is in mesh with an inner tooth ring, the horizontal shaft is fixedly provided with a small bevel gear and an eccentric wheel, the small bevel gear is in mesh with the large bevel gear, the rotating box is slidably provided with an abutting plate, the top of the abutting plate is fixedly provided with a push plate and a return spring, the abutting plate is movably abutted against the bottom of the fixed ring, the bottom end of the return spring is fixedly provided on the top inner wall of the rotating box, and the eccentric wheel is movably abutted against the bottom of the abutting plate.

[0014] Preferably, the outside of the rotating box is fixedly provided with a guide frame, and the annular frame is fixedly provided with an annular guide rail, the guide frame being slidably sleeved on the outside of the annular guide rail.

[0015] Preferably, the material collecting mechanism comprises a collecting frame, a supporting plate and a guide frame, the supporting plate being fixedly provided on the outside of the fixed column, the bottom of the guide frame being fixedly provided with a triangular plate, the triangular plate and the supporting plate being fixedly provided with a pressure sensor, the bottom of the triangular plate being fixedly provided with a vertical rod, the vertical rod being slidably provided in the inner part of the supporting plate, the outside of the fixed column being fixedly sleeved with a bottom plate, and the collecting frame being arranged on the top of the bottom plate.

[0016] Preferably, the top of the base is fixedly provided with a controller, the controller being signal-connected with the pressure sensor, the rotary motor and the driving motor, and the circular sieve frame being fixedly provided with a material collecting hopper.

[0017] The present application has the advantages that:

[0018] 1、The silicon carbide screening device for sandpaper production, the silicon carbide to be screened is put into the top of the feeding hopper, then the silicon carbide is guided into the plurality of conical discharge frames through the multi-branch guide pipe and is guided out from the plurality of discharge ports, so as to be distributed on the top of the screen, at the same time, the rotary motor is started to drive the driving gear to rotate, the driving gear drives the rotating arm to rotate through the meshing with the driven gear, and drives the rotating box, the abutting plate and the pinion to synchronously perform the circumferential movement, the inner tooth ring drives the vertical shaft to rotate through the meshing with the pinion, the vertical shaft drives the horizontal shaft to accelerate the rotation through the meshing of the large bevel gear and the small bevel gear, the horizontal shaft drives the two eccentric wheels to rotate, the eccentric wheels drive the abutting plate to shake up and down through the abutment with the abutting plate and the cooperation of the return spring, so as to drive the push plate to perform the circumferential movement and reciprocating shaking up and down, the push plate drives the circular sieve frame and the screen in the circular sieve frame to shake in different directions through the abutment with the fixed ring, so as to screen the silicon carbide through the screen.

[0019] 2、The carbonized silicon screening device for sandpaper production, through the starting drive motor, the output shaft of the drive motor drives the driving shaft to rotate, the driving shaft drives the rotating column to rotate synchronously, the rotating column is matched with the spiral strip and the spiral groove, first drives the sliding plate to move downward, and the supporting spring is extruded, when the compression degree of the supporting spring and the rotating resistance of the installation box are balanced, the rotating column starts to drive the installation box to rotate, and drives the two rotating shafts and the two transmission gears to move in a circle, the ring gear is self-rotated through the meshing with the transmission gear while driving the rotating shaft to move in a circle, and drives the stirring blade to move in the same way, so that the stirring blade is scattered on the screen, so that the carbonized silicon is uniformly distributed, the screening efficiency is improved, the installation box drives the feeding hopper to rotate, so that the plurality of conical discharge frames move in a circle, so that the carbonized silicon can be uniformly distributed on the surface of the screen, avoiding the accumulation of the material, affecting the screening rate;

[0020] 3、The carbonized silicon screening device for sandpaper production, when the stirring blade scatters the carbonized silicon, the resistance of the carbonized silicon is received, and the more serious the agglomeration degree of the carbonized silicon or the more the amount of the carbonized silicon on the screen, the greater the resistance received by the stirring blade, the resistance is directly fed back to the rotating resistance of the installation box, so that the sliding plate continues to move downward and extrudes the supporting spring to balance the resistance, the sliding plate moves downward while driving the four square plates to move downward, and the inclined hole and the V-shaped plate guide the inclined plate to move downward to make the opening degree of the discharge port smaller, so as to slow down the feeding rate and avoid the accumulation of the material;

[0021] 4、The carbonized silicon screening device for sandpaper production, the carbonized silicon screened by the screen falls into the guide frame and rolls to the lower right in the guide frame, and falls into the collection frame to realize the collection of the discharging, and the pressure sensor can sense the material quality in the guide frame, so as to judge the discharging rate of the screening, when the discharging rate is monitored to be reduced, the controller controls the rotating motor and the drive motor to accelerate operation, so as to accelerate the stirring blade to scatter the carbonized silicon, and at the same time, the drive mechanism accelerates the vibration frequency of the screen to maintain the screening rate at a stable level;

[0022] 5、The carbonized silicon screening device for sandpaper production, the feeding mechanism can realize uniform distribution and efficient scattering of the carbonized silicon material, so that the carbonized silicon is uniformly distributed on the screen, the screening rate is improved, and the feeding rate can be automatically adjusted according to the amount and agglomeration degree of the carbonized silicon on the screen, and the discharging rate is monitored by the material collecting mechanism, so as to facilitate the maintenance of the stable screening rate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1A perspective structural schematic view of a silicon carbide screening device for sand paper production according to the present application;

[0024] Figure 2 A sectional structural schematic view of a silicon carbide screening device for sand paper production according to the present application;

[0025] Figure 3 A Figure 2 partial enlarged view in the figure;

[0026] Figure 4 A Figure 2 partial enlarged view of A part in the figure;

[0027] Figure 5 A Figure 2 partial enlarged view of B part in the figure;

[0028] Figure 6 A Figure 2 partial enlarged view of C part in the figure;

[0029] Figure 7 A Figure 6 partial enlarged view of D part in the figure;

[0030] Figure 8 A perspective structural schematic view of a feeding mechanism according to the present application;

[0031] Figure 9 A perspective structural schematic view of a feeding hopper and baffle according to the present application;

[0032] Figure 10 A perspective structural schematic view of a material collecting mechanism according to the present application;

[0033] Figure 11 A partial perspective structural schematic view of a driving mechanism according to the present application;

[0034] Figure 12 A partial exploded perspective structural schematic view of a feeding mechanism according to the present application;

[0035] Figure 13 A partial overhead sectional perspective structural schematic view of a feeding mechanism according to the present application;

[0036] Figure 14 A lateral sectional structural schematic view of a feeding hopper according to the present application.

[0037] In the figure: 1, base; 101, annular frame; 2, circular screen frame; 201, fixed ring; 202, connecting spring; 203, screen mesh; 204, material collecting hopper; 3, feeding hopper; 301, circular funnel; 302, multi-branch guide pipe; 303, conical discharging frame; 4, mounting box; 401, rotating shaft; 402, stirring blade; 403, transmission gear; 404, annular rack; 405, rotating ring; 406, L-shaped support rod; 5, driving motor; 501, driving shaft; 502, rotating column; 503, spiral strip; 504, U-shaped frame; 505, arc-shaped track; 506, L-shaped support plate; 6, rotating box; 601, guide frame; 602, annular guide rail; 603, rotating arm; 604, driven gear; 605, driving gear; 606, rotary motor; 7, abutting plate; 701, push plate; 702, return spring; 8, vertical shaft; 801, pinion; 802, large bevel gear; 803, small bevel gear; 804, horizontal shaft; 805, eccentric wheel; 806, inner tooth ring; 9, sliding plate; 901, support spring; 902, damper; 903, spiral groove; 904, square groove; 905, square plate; 906, inclined plate; 907, V-shaped plate; 10, baffle; 11, fixed column; 1101, bottom plate; 1102, collecting frame; 1103, supporting plate; 1104, pressure sensor; 1105, triangular plate; 1106, guide frame; 12, controller. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0039] REFERENCE Figure 1 - Figure 14 A silicon carbide screening device for sandpaper production, comprising a base 1, a feeding mechanism, a screening mechanism, a driving mechanism and a material collecting mechanism, the screening mechanism comprising a circular screen frame 2 and a screen mesh 203 fixedly installed in the circular screen frame 2, and the top of the base 1 is fixedly installed with an annular frame 101, the outer side of the circular screen frame 2 is fixedly installed with a fixed ring 201, and a plurality of connecting springs 202 are fixedly installed between the annular frame 101 and the fixed ring 201;

[0040] The feeding mechanism comprises a feeding hopper 3, a driving motor 5, a mounting box 4 and two rotating shafts 401, the mounting box 4 is fixedly installed at the bottom of the feeding hopper 3, the rotating shafts 401 are rotatably installed in the mounting box 4, a plurality of stirring blades 402 are fixedly installed outside the rotating shafts 401, a transmission gear 403 is fixedly installed at one end of the rotating shaft 401, a driving shaft 501 is fixedly installed on the output shaft of the driving motor 5, a rotating column 502 is fixedly installed at the bottom end of the driving shaft 501 and extends into the mounting box 4, a plurality of spiral strips 503 are integrally formed outside the rotating column 502, a sliding plate 9 is slidingly installed in the mounting box 4, a circular hole is formed in the top of the sliding plate 9 and matched with the rotating column 502, and a spiral groove 903 matched with the spiral strip 503 is formed in the inner wall of the circular hole.

[0041] In the embodiment, L-shaped support plates 506 are fixedly installed at the two sides of the circular screen frame 2, arc-shaped tracks 505 are fixedly installed at the top of the L-shaped support plates 506, the same annular rack 404 is fixedly installed at the bottom of the two arc-shaped tracks 505, the transmission gear 403 is engaged with the annular rack 404, the same U-shaped frame 504 is fixedly installed at the top of the two arc-shaped tracks 505, the driving motor 5 is fixedly installed at the front side of the U-shaped frame 504, L-shaped support rods 406 are fixedly installed at the two sides of the feeding hopper 3, the same rotating ring 405 is fixedly installed at the other end of the two L-shaped support rods 406, the rotating shaft 401 is rotatably installed in the rotating ring 405, and the rotating ring 405 is slidingly sleeved outside the arc-shaped track 505, so that the rotating ring 405 is rotationally positioned.

[0042] In the embodiment, support springs 901 and dampers 902 are fixedly installed at the bottom of the sliding plate 9, the bottom ends of the support springs 901 and the dampers 902 are fixedly installed on the inner wall at the bottom of the mounting box 4, a guide column is fixedly installed in the mounting box 4, the sliding plate 9 is slidingly sleeved outside the guide column to guide the sliding plate 9, the rotating column 502 is rotatably installed in the mounting box 4, two inclined holes are formed in the front and rear sides of the mounting box 4, an inclined plate 906 is slidingly installed in the inclined hole, a baffle 10 is fixedly installed at the top of the inclined plate 906, a square plate 905 is fixedly installed on the side of the inclined plate 906 close to the rotating column 502, two square grooves 904 are formed in the front and rear sides of the sliding plate 9, and the square plate 905 is slidingly installed in the corresponding square groove 904.

[0043] V-shaped plates 907 are fixedly installed at the front and rear sides of the mounting box 4, and the inclined plate 906 is slidingly sleeved outside the corresponding V-shaped plate 907 to guide the inclined plate 906.

[0044] The feeding hopper 3 comprises a circular funnel 301, a multi-branch guide pipe 302 communicated with the bottom end of the circular funnel 301, and a plurality of conical discharging frames 303 communicated with the lower part of the multi-branch guide pipe 302, wherein the baffle 10 is movably abutted against the bottom of the conical discharging frame 303, and the bottom of the conical discharging frame 303 is provided with a discharging port.

[0045] In the embodiment, the driving mechanism comprises a rotary motor 606, a rotating arm 603, a rotating box 6 and an inner tooth ring 806, the inner tooth ring 806 is fixedly installed inside the annular frame 101, the top of the base 1 is fixedly installed with a fixed column 11, the rotating arm 603 is rotatably sleeved outside the fixed column 11, the bottom of the rotating arm 603 is fixedly installed with a driven gear 604, the rotary motor 606 is fixedly installed at the bottom of the base 1, a driving gear 605 is fixedly installed on the output shaft of the rotary motor 606, the driving gear 605 and the driven gear 604 are mutually engaged, and the rotating box 6 is fixedly installed at one end of the rotating arm 603.

[0046] In the embodiment, the rotating box 6 is rotatably installed with a horizontal shaft 804 and a vertical shaft 8 inside, the vertical shaft 8 is fixedly installed with a pinion 801 and a large bevel gear 802, the pinion 801 and the inner tooth ring 806 are mutually engaged, the horizontal shaft 804 is fixedly installed with a small bevel gear 803 and an eccentric wheel 805, the small bevel gear 803 and the large bevel gear 802 are mutually engaged, the rotating box 6 is slidably installed with an abutment plate 7, the top of the abutment plate 7 is fixedly installed with a push plate 701 and a return spring 702, the abutment plate 7 is movably abutted against the bottom of the fixed ring 201, the bottom end of the return spring 702 is fixedly installed on the top inner wall of the rotating box 6, and the eccentric wheel 805 is movably abutted against the bottom of the abutment plate 7.

[0047] In the embodiment, the rotating box 6 is fixedly installed with a guide frame 601 outside, the annular frame 101 is fixedly installed with an annular guide rail 602 inside, and the guide frame 601 is slidably sleeved outside the annular guide rail 602.

[0048] In the embodiment, the collecting mechanism comprises a collecting frame 1102, a supporting plate 1103 and a guide frame 1106, the supporting plate 1103 is fixedly installed outside the fixed column 11, the bottom of the guide frame 1106 is fixedly installed with a triangular plate 1105, the triangular plate 1105 and the supporting plate 1103 are fixedly installed with a pressure sensor 1104 therebetween, the bottom of the triangular plate 1105 is fixedly installed with a vertical rod, the vertical rod is slidably installed inside the supporting plate 1103, the fixed column 11 is fixedly sleeved with a bottom plate 1101 outside, and the collecting frame 1102 is arranged at the top of the bottom plate 1101.

[0049] In this embodiment, the top of the base 1 is fixedly installed with a controller 12, which is signal connected with the pressure sensor 1104, the rotary motor 606 and the driving motor 5, and the circular sieve frame 2 is fixedly installed with a material collecting hopper 204.

[0050] In use, silicon carbide to be sieved is placed in the top of the feed hopper 3, then the silicon carbide is guided into the plurality of conical discharge frames 303 through the multi-branch guide pipe 302, and is guided out of the plurality of discharge ports to be distributed on the top of the screen 203, at the same time, the rotating motor 606 is started to drive the driving gear 605 to rotate, the driving gear 605 drives the rotating arm 603 to rotate through meshing with the driven gear 604, and drives the rotating box 6, the abutment plate 7 and the pinion 801 to perform synchronous circumferential movement, the inner tooth ring 806 drives the vertical shaft 8 to rotate through meshing with the pinion 801, the vertical shaft 8 drives the horizontal shaft 804 to accelerate rotation through meshing of the large bevel gear 802 and the small bevel gear 803, the horizontal shaft 804 drives the two eccentric wheels 805 to rotate, the eccentric wheels 805 drive the abutment plate 7 to vibrate up and down through abutting with the abutment plate 7 and cooperating with the return spring 702, so as to drive the push plate 701 to perform circumferential movement while reciprocating up and down, the push plate 701 drives the circular screen frame 2 and the screen 203 inside the circular screen frame 2 to vibrate in different directions through abutting with the fixed ring 201, so as to sieve the silicon carbide through the screen 203, the driving motor 5 is started, the output shaft of the driving motor 5 drives the driving shaft 501 to rotate, the driving shaft 501 drives the rotating column 502 to rotate synchronously, the rotating column 502 drives the sliding plate 9 to move downward and press the supporting spring 901 through cooperation of the helical strip 503 and the helical groove 903 first, when the compression degree of the supporting spring 901 balances with the rotation resistance of the mounting box 4, the rotating column 502 starts to drive the mounting box 4 to rotate, and drives the two rotating shafts 401 and the two transmission gears 403 to perform circumferential movement, the annular rack 404 drives the rotating shaft 401 to perform circumferential movement while rotating through meshing with the transmission gear 403, and drives the stirring blade 402 to perform the same movement, so as to disperse the silicon carbide agglomerated on the screen 203 through the stirring blade 402, so as to uniformly distribute the silicon carbide and improve the sieving efficiency, the mounting box 4 drives the feed hopper 3 to rotate, so that the plurality of conical discharge frames 303 perform circumferential movement, so as to uniformly spread the silicon carbide on the surface of the screen 203, to avoid material accumulation and affect the sieving rate, when the stirring blade 402 disperses the silicon carbide, the stirring blade 402 will be subjected to resistance of the silicon carbide, and the more serious the agglomeration of the silicon carbide or the more the amount of the silicon carbide on the screen 203, the greater the resistance the stirring blade 402 is subjected to, this resistance will be directly fed back to the rotation resistance of the mounting box 4, so that the sliding plate 9 continues to move downward and press the supporting spring 901 to balance the resistance, the sliding plate 9 drives the four square plates 905 to move downward while moving downward, and drives the inclined plate 906 to move downward through the guide of the inclined hole and the V-shaped plate 907 to the conical discharge frame 303, so as to reduce the opening degree of the discharge port, thereby slowing down the feeding rate and avoiding material accumulation, the silicon carbide sieved through the screen 203 falls into the guide frame 1106, rolls to the lower right in the guide frame 1106, and falls into the collection frame 1102 to realize discharge collection,And the pressure sensor 1104 can sense the material mass in the guide frame 1106, so as to determine the discharging rate at the screening position. When the discharging rate is monitored to be reduced, the rotating motor 606 and the driving motor 5 are controlled to accelerate operation by the controller 12, so as to accelerate the dispersion of the silicon carbide by the stirring blade 402, and at the same time, the vibration frequency of the driving mechanism to the screen 203 is accelerated, so as to maintain the screening rate at a stable level.

[0051] The above describes in detail the silicon carbide screening device for the production of sandpaper. The principles and implementation methods of the present application are described by using specific examples. The above examples are only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified. These improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A silicon carbide screening device for the production of abrasive paper, characterized by, The utility model relates to a kind of screening machines, including: Base (1), feed mechanism, screening mechanism, drive mechanism and material receiving mechanism, the screening mechanism includes: circular screen frame (2) and fixedly installed in the screen cloth (203) of the circular screen frame (2), the top of the base (1) is fixedly installed with annular frame (101), the outer side of the circular screen frame (2) is fixedly installed with fixed ring (201), a plurality of connecting springs (202) are fixedly installed between the annular frame (101) and fixed ring (201); The feed mechanism includes: feed hopper (3), drive motor (5), mounting box (4) and two rotating shafts (401), the mounting box (4) is fixedly installed at the bottom of feed hopper (3), the rotating shaft (401) is rotatably installed in mounting box (4), a plurality of stirring blades (402) are fixedly installed on the outer side of the rotating shaft (401), a drive gear (403) is fixedly installed on one end of the rotating shaft (401), a drive shaft (501) is fixedly installed on the output shaft of the drive motor (5), the bottom end of the drive shaft (501) extends into the mounting box (4) and is fixedly installed with a rotating column (502), a plurality of helical strips (503) are integrally formed on the outer side of the rotating column (502), a sliding plate (9) is slidably installed in the mounting box (4), a circular hole is formed in the top of the sliding plate (9) and is adapted to the rotating column (502), a helical groove (903) is formed in the inner wall of the circular hole and is adapted to the helical strip (503), a support spring (901) and a damper (902) are fixedly installed on the bottom of the sliding plate (9), the bottom end of the support spring (901) and the damper (902) is fixedly installed on the inner wall of the bottom of the mounting box (4), and a guide column is fixedly installed in the mounting box (4), the sliding plate (9) is slidably sleeved on the outer side of the guide column, the rotating column (502) is rotatably installed in the mounting box (4), two inclined holes are formed in the front and rear sides of the mounting box (4), an inclined plate (906) is slidably installed in the inclined hole, a baffle (10) is fixedly installed on the top of the inclined plate (906), a square plate (905) is fixedly installed on the side of the inclined plate (906) close to the rotating column (502), two square grooves (904) are formed in the front and rear sides of the sliding plate (9), the square plate (905) is slidably installed in the corresponding square groove (904). V-shaped plate (907) is fixedly installed on the front and rear sides of the mounting box (4), the inclined plate (906) is slidably sleeved on the outer side of the corresponding V-shaped plate (907).

2. The silicon carbide screening device for sand paper production according to claim 1, wherein, Both sides of the circular screen frame (2) are fixedly installed with L-shaped support plates (506), the top of the L-shaped support plate (506) is fixedly installed with an arc-shaped track (505), the bottom of the two arc-shaped tracks (505) is fixedly installed with the same annular rack (404), the transmission gear (403) is meshed with the annular rack (404), the top of the two arc-shaped tracks (505) is fixedly installed with the same U-shaped frame (504), the driving motor (5) is fixedly installed on the front side of the U-shaped frame (504), both sides of the feeding hopper (3) are fixedly installed with L-shaped support rods (406), the other end of the two L-shaped support rods (406) is fixedly installed with the same rotating ring (405), the rotating shaft (401) is rotatably installed in the rotating ring (405), and the rotating ring (405) is slidably sleeved on the outside of the arc-shaped track (505).

3. The silicon carbide screening device for sand paper production according to claim 1, wherein, The feeding hopper (3) comprises a circular funnel (301), a multi-branch guide pipe (302) and a plurality of conical discharge frames (303), the multi-branch guide pipe (302) is communicated with the bottom end of the circular funnel (301), the conical discharge frame (303) is communicated below the multi-branch guide pipe (302), the baffle (10) is movably abutted against the bottom of the conical discharge frame (303), and the bottom of the conical discharge frame (303) is provided with a discharge port.

4. The silicon carbide screening device for sand paper production according to claim 1, wherein, The driving mechanism comprises a rotary motor (606), a rotating arm (603), a rotating box (6) and an inner tooth ring (806), the inner tooth ring (806) is fixedly installed inside the annular frame (101), the top of the base (1) is fixedly installed with a fixed column (11), the rotating arm (603) is rotatably sleeved on the outside of the fixed column (11), the bottom of the rotating arm (603) is fixedly installed with a driven gear (604), the rotary motor (606) is fixedly installed on the bottom of the base (1), a driving gear (605) is fixedly installed on the output shaft of the rotary motor (606), the driving gear (605) is meshed with the driven gear (604), and the rotating box (6) is fixedly installed at one end of the rotating arm (603).

5. The silicon carbide screening device for sand paper production according to claim 4, wherein, The rotating box (6) is rotatably installed with a horizontal shaft (804) and a vertical shaft (8), a small gear (801) and a large bevel gear (802) are fixedly installed on the vertical shaft (8), the small gear (801) is meshed with the inner tooth ring (806), a small bevel gear (803) and an eccentric wheel (805) are fixedly installed on the horizontal shaft (804), the small bevel gear (803) is meshed with the large bevel gear (802), a abutting plate (7) is slidably installed in the rotating box (6), the top of the abutting plate (7) is fixedly installed with a push plate (701) and a reset spring (702), the abutting plate (7) is movably abutted against the bottom of the fixed ring (201), the bottom end of the reset spring (702) is fixedly installed on the top inner wall of the rotating box (6), and the eccentric wheel (805) is movably abutted against the bottom of the abutting plate (7).

6. The silicon carbide screening device for sand paper production according to claim 5, wherein, The outer side of the rotating box (6) is fixedly installed with a guide frame (601), the annular frame (101) is fixedly installed with an annular guide rail (602), and the guide frame (601) is slidingly sleeved on the outer side of the annular guide rail (602).

7. The silicon carbide screening device for sand paper production according to claim 1, wherein, The material collecting mechanism comprises a collecting frame (1102), a supporting plate (1103) and a guide frame (1106), the supporting plate (1103) is fixedly installed on the outer side of the fixed column (11), the bottom of the guide frame (1106) is fixedly installed with a triangular plate (1105), the triangular plate (1105) and the supporting plate (1103) are fixedly installed with a pressure sensor (1104), the bottom of the triangular plate (1105) is fixedly installed with a vertical rod, the vertical rod is slidingly installed in the supporting plate (1103), the outer side of the fixed column (11) is fixedly sleeved with a bottom plate (1101), and the collecting frame (1102) is arranged on the top of the bottom plate (1101).

8. The silicon carbide screening device for sand paper production according to claim 1, wherein, The top of the base (1) is fixedly installed with a controller (12), the controller (12) is signal connected with the pressure sensor (1104), the rotating motor (606) and the driving motor (5), and the circular sieve frame (2) is fixedly installed with a material collecting hopper (204).

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