Silicon nitride polishing device

Abstract

This invention discloses a silicon nitride grinding device, relating to the technical field of silicon nitride grinding devices. The device includes a support frame and a collection box. A conical cylinder is fixedly mounted on the upper surface of the support frame, and the collection box is disposed on the lower surface of the support frame. A feed trough is fixedly mounted on the upper surface of the conical cylinder, and a water storage tank is fixedly mounted on the circumferential surface of the conical cylinder. A water spray head is provided on the inner wall of the conical cylinder. A rotating shaft is rotatably mounted on the upper surface of the inner wall of the conical cylinder, and a grinding head is fixedly mounted on the lower surface of the rotating shaft. A grinding disc is fixedly mounted on the inner wall of the conical cylinder. A material unblocking device is also provided inside the conical cylinder. When the feed trough is blocked, it affects the grinding efficiency, potentially causing a decrease in output or production stoppage. Blockage causes material to accumulate in the feed trough, increasing the pressure and stress on the material. If this blockage persists for a long time, it may damage the feed trough.

Description

Technical Field

[0001] This invention relates to the field of silicon nitride grinding equipment technology, specifically to a silicon nitride grinding equipment. Background Technology

[0002] Silicon nitride is an important structural ceramic material. It is an ultrahard substance with inherent lubricating properties.

[0003] The patent publication number CN220143621U relates to a silicon nitride grinding device, including a feed inlet. A grinding box is fixedly connected below the feed inlet, and a sieve box is fixedly connected below the grinding box. This patent utilizes a grinding block fixedly connected to the inner wall of the feed inlet and a grinding rod fixedly connected to the right side of the grinding block to crush the silicon nitride. A driving gear fixedly connected to the front of the grinding rod drives the grinding device. A grinding ring fixedly connected below the grinding block and a second grinding ring fixedly connected below the grinding ring within the grinding box cavity both perform fine grinding. A second motor fixedly connected to the inner cavity of the machine box provides power, rotating a stirring rod fixedly connected to the top of the second motor. The rotation of the gear fixedly connected to the top of the stirring rod drives the second gears rotating on both sides of the first gear, and also causes a fixing rod fixedly connected in the middle of the second gear to fix the second gear.

[0004] The aforementioned patent utilizes a motor fixedly installed on the top left side of the screen box to provide power, and linked rocker arms fixedly installed on both sides of the screen box cavity to achieve linkage, so that the screen mesh fixedly connected below the linked rocker arms and located inside the screen box cavity plays a filtering and separation role. However, when the feed chute is blocked, it needs to be cleaned, which increases maintenance costs and downtime. In addition, frequent maintenance may also affect the normal operation and lifespan of the equipment. If the material stays in the feed chute for a long time, it may lead to a decline in the quality of the material, especially perishable materials, affecting subsequent processing and use. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a silicon nitride grinding apparatus, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a silicon nitride grinding device, comprising a support frame and a collection box, wherein a conical cylinder is fixedly mounted on the upper surface of the support frame, the collection box is disposed on the lower surface of the support frame, a feed trough is fixedly mounted on the upper surface of the conical cylinder, a water storage tank is fixedly mounted on the circumferential surface of the conical cylinder, a water spray head is provided on the inner wall of the conical cylinder, a rotating shaft is rotatably mounted on the upper surface of the inner wall of the conical cylinder, a grinding head is fixedly mounted on the lower surface of the rotating shaft, a grinding disc is fixedly mounted on the inner wall of the conical cylinder, and a material unloading device is also provided inside the conical cylinder;

[0007] The material unloading device includes a vertical rod, a first baffle plate, a push rod, a first rotating rod, a first gear shaft, a second gear shaft, a sweeping plate, a push rod, a pressure rod, an inclined rod, a unloading rod, and an inclined head rod. The inclined head rod is fixedly installed on the circumferential surface of the rotating shaft. The first baffle plate is rotatably installed in the feed chute. The vertical rod is fixedly installed on the lower surface of the first baffle plate. The push rod is fixedly installed on the upper surface of the first baffle plate. One end of the first rotating rod is rotatably installed on the upper end of the push rod. The first gear shaft is rotatably installed on the inner wall of the feed chute. The other end of the first rotating rod is rotatably installed on the first gear shaft. The second gear shaft is rotatably mounted on the upper surface of the feed trough. The sweeping plate is fixedly mounted on the circumferential surface of the second gear shaft. The push rod is slidably mounted on the inner wall of the feed trough. The pressure rod is slidably mounted on the inner wall of the feed trough. The inclined rod is rotatably mounted on the inner wall of the feed trough. The unblocking rod is fixedly mounted on one end of the inclined rod. When the feed trough is blocked, it will affect the grinding efficiency and may cause a decrease in output or production stoppage. Blockage will cause material to accumulate in the feed trough, increasing the pressure and stress of the material. If it lasts for a long time, it may damage the feed trough.

[0008] According to the above technical solution, the other end of the inclined rod is in contact with the lower surface of the pressure rod, the push rod is in contact with the pressure rod, the first gear shaft and the second gear shaft mesh with each other, and a first torsion spring is provided between the first baffle plate and the feed chute. The first torsion spring is provided to drive the first baffle plate to rotate and intermittently open and close the feed chute.

[0009] According to the above technical solution, the conical cylinder is further equipped with an extrusion device and a lubrication device. The extrusion device includes a crossbar, a first short rod, a disc, a connecting rod, an inclined block, a push rod, a second short rod, a rotating plate, a square block, an L-shaped rod, and a pressing groove. The pressing groove is fixedly installed on the inner wall of the conical cylinder. The disc is slidably installed on the inner wall of the pressing groove. The first short rod is fixedly installed on the upper surface of the disc. The connecting rod is movably and fixedly installed on the lower surface of the disc. The inclined block is fixedly installed on the lower surface of the connecting rod. The push rod is slidably installed on the inner wall of the pressing groove and contacts the circumferential surface of the rotating shaft. One end of the second short rod is fixedly installed on the lower surface of the disc. The rotating plate is rotatably installed on the other end of the second short rod. The L-shaped rod is fixedly installed on the lower surface of the rotating plate. The square block is fixedly installed on the lower surface of the pressing groove. The disc extrudes the material for pre-compression. Pre-compression helps ensure that the material is evenly stressed during grinding, reducing cracks and defects generated during processing. Lack of pre-compression may lead to poor contact between particles, thereby reducing grinding efficiency.

[0010] According to the above technical solution, a clamping plate is provided on the side of the push rod near the rotating shaft. The clamping plate clamps the rotating shaft. A spring is provided between the clamping plate and the push rod. The spring is provided to push the clamping plate to contact the rotating shaft when the inclined block is not in contact with the clamping plate. The upper surface of the clamping plate is in contact with the inclined block.

[0011] According to the above technical solution, a discharge groove is provided on the lower surface of the pressing groove. The rotating plate is larger than the discharge groove. The rotating plate is larger than the discharge groove in order to seal the discharge groove. The rotating plate is in contact with the discharge groove, and the upper surface of the L-shaped rod is in contact with the lower surface of the block.

[0012] According to the above technical solution, the lubrication device includes a hydraulic cylinder, a hydraulic rod, a one-way valve, a sliding plate, an inclined plate, a second rotating rod, a first scraper, and a second scraper. The hydraulic cylinder is fixedly installed on the inner wall of the conical cylinder. One end of the hydraulic rod is slidably installed on the inner wall of the hydraulic cylinder. The one-way valve is fixedly installed on the inner wall of the hydraulic cylinder. The sliding plate is fixedly installed on the other end of the hydraulic rod. The inclined plate is fixedly installed on the upper surface of the sliding plate. The second rotating rod is rotatably installed on the inner wall of the conical cylinder. The first scraper is fixedly installed on the lower surface of the grinding head. The hydraulic cylinder sprays lubricating oil through a water spray head to cool and lubricate the material being ground. Without lubrication, friction between silicon nitride particles may cause particles to break or fall off, affecting the integrity and quality of the material. Lack of lubrication may lead to instability in the grinding process, thereby reducing the processing accuracy and consistency.

[0013] According to the above technical solution, the upper surface of the grinding disc is provided with a discharge port, the upper surface of the discharge port is provided with a filter screen, the second scraper is rotatably mounted on the upper surface of the filter screen, and a second torsion spring is provided between the second scraper and the filter screen. The second torsion spring is provided to facilitate pulling the second scraper back to its original position to clean the filter screen. A second spring is provided between the slide plate and the conical cylinder. The second spring is provided to drive the slide plate back to its original position.

[0014] According to the above technical solution, the spray head is connected to the hydraulic cylinder through a hose. The hose is fixedly installed on the side of the one-way valve near the spray head. The water tank is connected to the hydraulic cylinder. A pressure control valve is provided at the position where the water tank is connected to the hydraulic cylinder. The pressure control valve is provided to ensure that the lubricating oil inside the water tank can only flow into the hydraulic cylinder in one direction. A torsion spring is provided between the second rotating rod and the conical cylinder. The torsion spring is provided to drive the second rotating rod back to its original position.

[0015] This invention provides a silicon nitride grinding apparatus. It has the following beneficial effects:

[0016] (1) In this invention, the rotation of the No. 2 gear shaft will drive the sweeping plate to rotate, the rotation of the sweeping plate will push the push rod to move, the movement of the push rod will push the pressure rod to slide downward, the downward sliding of the pressure rod will press the inclined rod to rotate, the rotation of the inclined rod will drive the unblocking rod to move to unblock the material inside the feed trough, so as to avoid the material from blocking the feed trough. When the feed trough is blocked, it will affect the grinding efficiency and may cause a decrease in output or production stoppage. Blockage will cause the material to accumulate in the feed trough, increasing the pressure and stress of the material. If it lasts for a long time, it may damage the feed trough.

[0017] (2) In this invention, the rotation of the rotating shaft will drive the ejector rod to rotate and stir the internal material. The rotation of the vertical rod will push the horizontal rod to move. The horizontal rod will contact the first short rod and push the first short rod to move downward. The first short rod will push the disc to slide downward. The disc will slide downward and drive the connecting rod to move. The connecting rod will push the inclined block to move. The inclined block will push the clamping plate to move and release the clamping of the rotating shaft. This avoids the rotating shaft driving the pusher rod to rotate and contact the pressed material when the disc is squeezing and pre-frictioning the material. This would cause the pusher rod to be blocked by the material, increasing the reverse stress on the rotating shaft and affecting the normal use of the rotating shaft. The disc squeezes the material to perform pre-pressure. Pre-pressure can help ensure that the material is evenly stressed during grinding and reduce cracks and defects generated during processing. Lack of pre-pressure may lead to poor contact between particles, thereby reducing grinding efficiency.

[0018] (3) In this invention, the rotation of the rotating shaft will drive the grinding head to rotate, the rotation of the grinding head will drive the first scraper to rotate, the rotation of the first scraper will drive the second scraper to rotate to scrape the surface of the filter screen, the rotation of the first scraper will drive the second rotating rod to rotate, the rotation of the second rotating rod will drive the slide to move, the movement of the slide will drive the inclined block to move, and the hydraulic cylinder will spray the lubricating oil through the water spray head to cool and lubricate the grinding material. Without lubrication, the friction between silicon nitride particles may cause the particles to break or fall off, affecting the integrity and quality of the material. Lack of lubrication may cause the grinding process to be unstable, thereby reducing the processing accuracy and consistency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the position and structure of the rotating shaft and grinding head of the present invention;

[0021] Figure 3 This is a schematic diagram showing the position and structure of the vertical rod and the first baffle plate of the present invention;

[0022] Figure 4 This is a schematic diagram showing the position and structure of the conical cylinder and hydraulic cylinder of the present invention;

[0023] Figure 5 This is a schematic diagram of the position structure of the connecting rod and the inclined block in this invention;

[0024] Figure 6 This is a schematic diagram of the position structure of the connecting rod and the disk in this invention;

[0025] Figure 7 This is a schematic diagram showing the position and structure of the hydraulic cylinder and hydraulic rod of the present invention.

[0026] In the diagram: 1. Support frame; 2. Conical cylinder; 3. Feed chute; 4. Collection box; 5. Water storage tank; 6. Spray head; 7. Rotating shaft; 8. Grinding head; 9. Grinding disc; 101. Vertical rod; 102. No. 1 baffle plate; 103. Push rod; 104. No. 1 rotating rod; 105. No. 1 gear shaft; 106. No. 2 gear shaft; 107. Sweeping plate; 108. Push rod; 109. Pressure rod; 110. Inclined rod; 111. Unblocking rod; 112. Inclined rod Head rod; 201, crossbar; 202, short rod No. 1; 203, disc; 204, connecting rod; 205, inclined block; 206, push rod; 207, short rod No. 2; 208, rotating plate; 209, block; 210, L-shaped rod; 211, pressing groove; 301, hydraulic cylinder; 302, hydraulic rod; 303, one-way valve; 304, sliding plate; 305, inclined plate; 306, rotating rod No. 2; 307, scraper No. 1; 308, scraper No. 2. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-7 One embodiment of the present invention is: a silicon nitride grinding device, including a support frame 1 and a collection box 4. A conical cylinder 2 is fixedly installed on the upper surface of the support frame 1, and the collection box 4 is disposed on the lower surface of the support frame 1. A feed trough 3 is fixedly installed on the upper surface of the conical cylinder 2. A water storage tank 5 is fixedly installed on the circumferential surface of the conical cylinder 2. A water spray head 6 is provided on the inner wall of the conical cylinder 2. A rotating shaft 7 is rotatably installed on the upper surface of the inner wall of the conical cylinder 2. A grinding head 8 is fixedly installed on the lower surface of the rotating shaft 7. A grinding disc 9 is fixedly installed on the inner wall of the conical cylinder 2. A material unloading device is also provided inside the conical cylinder 2.

[0029] The material unloading device includes a vertical rod 101, a first baffle plate 102, a push rod 103, a first rotating rod 104, a first gear shaft 105, a second gear shaft 106, a sweeping plate 107, a push rod 108, a pressure rod 109, an inclined rod 110, a unloading rod 111, and an inclined head rod 112. The inclined head rod 112 is fixedly installed on the circumferential surface of the rotating shaft 7. The first baffle plate 102 is rotatably installed on the feed trough 3. The vertical rod 101 is fixedly installed on the lower surface of the first baffle plate 102. The push rod 103 is fixedly installed on the upper surface of the first baffle plate 102. One end of the first rotating rod 104 is rotatably installed on the upper end of the push rod 103. The first gear shaft 105 is rotatably installed on the inner wall of the feed trough 3. The other end of rod 104 is rotatably mounted on the circumferential surface of gear shaft 105, gear shaft 106 is rotatably mounted on the upper surface of feed trough 3, sweeping plate 107 is fixedly mounted on the circumferential surface of gear shaft 106, push rod 108 is slidably mounted on the inner wall of feed trough 3, pressure rod 109 is slidably mounted on the inner wall of feed trough 3, inclined rod 110 is rotatably mounted on the inner wall of feed trough 3, and unblocking rod 111 is fixedly mounted on one end of inclined rod 110. When feed trough 3 is blocked, it will affect the grinding efficiency and may cause a decrease in output or production stoppage. Blockage will cause material to accumulate in feed trough 3, increasing the pressure and stress of the material. If it lasts for a long time, it may damage feed trough 3.

[0030] The other end of the inclined rod 110 contacts the lower surface of the pressure rod 109, the push rod 108 contacts the pressure rod 109, the first gear shaft 105 and the second gear shaft 106 mesh with each other, and a first torsion spring is provided between the first baffle plate 102 and the feed trough 3. The first torsion spring is provided to drive the first baffle plate 102 to rotate and intermittently open and close the feed trough 3.

[0031] In this embodiment, during normal operation: The rotating shaft 7 operates normally, driving the grinding head 8 to grind the material on the grinding disc 9. The rotation of the rotating shaft 7 causes the inclined rod 112 to rotate, which in turn drives the vertical rod 101 to rotate. The movement of the vertical rod 101 causes the first baffle plate 102 to rotate, which in turn drives the push rod 103 to rotate. The rotation of the push rod 103 then drives the first rotating rod 104 to rotate. Rotating rod 104 will drive the first gear shaft 105 to rotate, which in turn will drive the second gear shaft 106 to rotate. Rotating gear shaft 106 will drive the sweeping plate 107 to rotate, which will push the push rod 108 to move. Moving the push rod 108 will push the pressure rod 109 to slide downwards, which will press the inclined rod 110 to rotate. Rotating the inclined rod 110 will drive the unblocking rod 111 to move and unblock the material inside the feed trough 3.

[0032] Please see Figures 1-7Based on the above embodiments, in another embodiment of the present invention, the conical cylinder 2 is further provided with an extrusion device and a lubrication device. The extrusion device includes a crossbar 201, a first short rod 202, a disc 203, a connecting rod 204, an inclined block 205, a push rod 206, a second short rod 207, a rotating plate 208, a square block 209, an L-shaped rod 210, and a pressing groove 211. The pressing groove 211 is fixedly installed on the inner wall of the conical cylinder 2, the disc 203 is slidably installed on the inner wall of the pressing groove 211, the first short rod 202 is fixedly installed on the upper surface of the disc 203, the connecting rod 204 is movably and fixedly installed on the lower surface of the disc 203, and the inclined block 205 is fixedly installed. On the lower surface of the connecting rod 204, the push rod 206 is slidably installed on the inner wall of the pressing groove 211. The push rod 206 is in contact with the circumferential surface of the rotating shaft 7. One end of the second short rod 207 is fixedly installed on the lower surface of the disc 203. The rotating plate 208 is rotatably installed on the other end of the second short rod 207. The L-shaped rod 210 is fixedly installed on the lower surface of the rotating plate 208. The block 209 is fixedly installed on the lower surface of the pressing groove 211. The disc 203 extrudes the material for pre-compression. Pre-compression helps to ensure that the material is evenly stressed during grinding, reducing cracks and defects generated during processing. Lack of pre-compression may lead to poor contact between particles, thereby reducing grinding efficiency.

[0033] A clamping plate is provided on the side of the push rod 206 near the rotating shaft 7. The clamping plate clamps the rotating shaft 7. A No. 1 spring is provided between the clamping plate and the push rod 206. The No. 1 spring is provided so that when the inclined block 205 is not in contact with the clamping plate, it pushes the clamping plate to contact the rotating shaft. The upper surface of the clamping plate contacts the inclined block 205.

[0034] The lower surface of the pressing groove 211 is provided with a discharge groove. The rotating plate 208 is larger than the discharge groove. The rotating plate 208 is larger than the discharge groove in order to seal the discharge groove. The rotating plate 208 is in contact with the discharge groove. The upper surface of the L-shaped rod 210 is in contact with the lower surface of the block 209.

[0035] The lubrication device includes a hydraulic cylinder 301, a hydraulic rod 302, a one-way valve 303, a sliding plate 304, an inclined plate 305, a second rotating rod 306, a first scraper 307, and a second scraper 308. The hydraulic cylinder 301 is fixedly installed on the inner wall of the conical cylinder 2. One end of the hydraulic rod 302 is slidably installed on the inner wall of the hydraulic cylinder 301. The one-way valve 303 is fixedly installed on the inner wall of the hydraulic cylinder 301. The sliding plate 304 is fixedly installed on the other end of the hydraulic rod 302. The inclined plate 305 is fixedly installed on the upper surface of the sliding plate 304. The second rotating rod 306 is rotatably installed on the inner wall of the conical cylinder 2. The first scraper 307 is fixedly installed on the lower surface of the grinding head 8. The hydraulic cylinder sprays lubricating oil through the water spray head 6 to cool and lubricate the material being ground. Without lubrication, the friction between silicon nitride particles may cause the particles to break or fall off, affecting the integrity and quality of the material. Lack of lubrication may lead to instability in the grinding process, thereby reducing the processing accuracy and consistency.

[0036] The upper surface of the grinding disc 9 has a discharge port, and the upper surface of the discharge port is equipped with a filter screen. The second scraper 308 is rotatably mounted on the upper surface of the filter screen. A second torsion spring is provided between the second scraper 308 and the filter screen. The second torsion spring is provided to facilitate pulling the second scraper 308 back to its original position to clean the filter screen. A second spring is provided between the slide plate 304 and the conical cylinder 2. The second spring is provided to drive the slide plate 304 back to its original position.

[0037] The spray head 6 is connected to the hydraulic cylinder 301 via a hose. The hose is fixedly installed on the side of the one-way valve 303 near the spray head 6. The water tank 5 is connected to the hydraulic cylinder 301. A pressure control valve is provided at the connection between the water tank 5 and the hydraulic cylinder 301. The pressure control valve is provided to ensure that the lubricating oil inside the water tank 5 can only flow into the hydraulic cylinder 301 in one direction. A torsion spring is provided between the second rotating rod 306 and the conical cylinder 2. The torsion spring is provided to drive the second rotating rod 306 back to its original position.

[0038] In this embodiment, during operation: the rotation of the rotating shaft 7 drives the push rod 206 to rotate, agitating the internal material; the rotation of the vertical rod 101 pushes the horizontal rod 201 to move; the horizontal rod 201 moves and contacts the first short rod 202, pushing the first short rod 202 downward; the downward movement of the first short rod 202 pushes the disc 203 to slide downward; the downward movement of the disc 203 drives the connecting rod 204 to move; the movement of the connecting rod 204 pushes the inclined block 205 to move; the movement of the inclined block 205 pushes the clamping plate to move, releasing it from the gripping of the rotating shaft 7; the movement of the disc 203 pushes the second short rod 207 to move; the movement of the second short rod 207 pushes the rotating plate 208 to move; the movement of the rotating plate 208 drives the L-shaped rod 210 to move; the movement of the L-shaped rod 210 releases its contact with the square block 209; the release of the L-shaped rod 210 from the square block 209 causes the rotating plate 208 to rotate; the rotation of the rotating plate 208 releases its contact with the discharge chute.

[0039] The rotation of the rotating shaft 7 drives the grinding head 8 to rotate, which in turn drives the first scraper 307 to rotate. The rotation of the first scraper 307 drives the second scraper 308 to rotate, scraping the surface of the filter screen. The rotation of the first scraper 307 drives the second rotating rod 306 to rotate, which in turn drives the slide plate 304 to move. The movement of the slide plate 304 drives the inclined plate 305 to move, which in turn drives the hydraulic rod 302 to move into the hydraulic cylinder 301. The movement of the hydraulic rod 302 into the hydraulic cylinder 301 causes the lubricating oil inside the hydraulic cylinder 301 to enter the water spray head 6 through the hose and be sprayed out through the water spray head 6. The lubricating oil sprayed out through the water spray head 6 lubricates and cools the material being ground.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silicon nitride grinding apparatus, comprising a support frame (1) and a collection box (4), characterized in that: A conical cylinder (2) is fixedly installed on the upper surface of the support frame (1), and a collection box (4) is set on the lower surface of the support frame (1). A feed trough (3) is fixedly installed on the upper surface of the conical cylinder (2). A water storage tank (5) is fixedly installed on the circumferential surface of the conical cylinder (2). A water spray head (6) is provided on the inner wall of the conical cylinder (2). A rotating shaft (7) is rotatably installed on the upper surface of the inner wall of the conical cylinder (2). A grinding head (8) is fixedly installed on the lower surface of the rotating shaft (7). A grinding disc (9) is fixedly installed on the inner wall of the conical cylinder (2). A material unloading device, a squeezing device, and a lubrication device are also provided inside the conical cylinder (2). The material unloading device includes a vertical rod (101), a first baffle plate (102), a push rod (103), a first rotating rod (104), a first gear shaft (105), a second gear shaft (106), a sweeping plate (107), a push rod (108), a pressure rod (109), an inclined rod (110), a unloading rod (111), and an inclined head rod (112). The inclined head rod (112) is fixedly installed on the circumferential surface of the rotating shaft (7). The first baffle plate (102) is rotatably installed on the feed trough (3). The vertical rod (101) is fixedly installed on the lower surface of the first baffle plate (102). The push rod (103) is fixedly installed on the upper surface of the first baffle plate (102). One end of the first rotating rod (104) is rotatably installed on the upper end of the push rod (103). The first gear shaft (105) is rotatably installed on the inner wall of the feed trough (3). The other end of the first rotating rod (104) is rotatably installed on the circumferential surface of the first gear shaft (105). The second gear shaft (106) is rotatably installed on the upper surface of the feed trough (3). The sweeping plate (107) is fixedly installed on the circumferential surface of the second gear shaft (106). The push rod (108) is slidably installed on the inner wall of the feed trough (3). The pressure rod (109) is slidably installed on the inner wall of the feed trough (3). The inclined rod (110) is rotatably installed on the inner wall of the feed trough (3). The unblocking rod (111) is fixedly installed at one end of the inclined rod (110), the other end of the inclined rod (110) is in contact with the lower surface of the pressure rod (109), the push rod (108) is in contact with the pressure rod (109), the first gear shaft (105) and the second gear shaft (106) mesh with each other, a first torsion spring is provided between the first baffle plate (102) and the feed chute (3), and the rotation of the inclined rod (112) will push the vertical rod (101) to rotate; The extrusion device includes a crossbar (201), a first short rod (202), a disc (203), a connecting rod (204), an inclined block (205), a push rod (206), a second short rod (207), a rotating plate (208), a square block (209), an L-shaped rod (210), and a pressing groove (211). The pressing groove (211) is fixedly installed on the inner wall of the conical cylinder (2), and the disc (203) is slidably installed on the inner wall of the pressing groove (211). The first short rod (202) is fixedly installed on the inner wall of the pressing groove (211). Mounted on the upper surface of the disc (203), the vertical rod (101) rotates to push the horizontal rod (201) to move. The horizontal rod (201) moves and contacts the first short rod (202), pushing the first short rod (202) to move downward. The connecting rod (204) is fixedly mounted on the lower surface of the disc (203). The inclined block (205) is fixedly mounted on the lower surface of the connecting rod (204). The push rod (206) is slidably mounted on the inner wall of the pressing groove (211). The push rod (206) rotates with the disc (203). The circumferential surface of the shaft (7) is in contact. One end of the second short rod (207) is fixedly installed on the lower surface of the disc (203). The rotating plate (208) is rotatably installed on the other end of the second short rod (207). The L-shaped rod (210) is fixedly installed on the lower surface of the rotating plate (208). The block (209) is fixedly installed on the lower surface of the pressing groove (211). The push rod (206) has a clamping plate on the side near the rotating shaft (7). The clamping plate clamps the rotating shaft (7). The clamping plate and the push rod are in contact. A spring is provided between the material rods (206). The upper surface of the clamp plate is in contact with the inclined block (205). The movement of the inclined block (205) will push the clamp plate to move and release the clamping of the rotating shaft (7). The lower surface of the pressing groove (211) is provided with a discharge groove. The rotating plate (208) is larger than the discharge groove. The rotating plate (208) is in contact with the discharge groove. The rotation of the rotating plate (208) will release the contact with the discharge groove. The upper surface of the L-shaped rod (210) is in contact with the lower surface of the block (209).

2. The silicon nitride grinding apparatus according to claim 1, characterized in that: The lubrication device includes a hydraulic cylinder (301), a hydraulic rod (302), a one-way valve (303), a sliding plate (304), an inclined plate (305), a second rotating rod (306), a first scraper (307), and a second scraper (308). The hydraulic cylinder (301) is fixedly installed on the inner wall of the conical cylinder (2). One end of the hydraulic rod (302) is slidably installed on the inner wall of the hydraulic cylinder (301). The one-way valve (303) is fixedly installed on the inner wall of the hydraulic cylinder (301). The sliding plate (304) is fixedly installed on the other end of the hydraulic rod (302). The inclined plate (305) is fixedly installed on the upper surface of the sliding plate (304). The second rotating rod (306) is rotatably installed on the inner wall of the conical cylinder (2). The first scraper (307) is fixedly installed on the lower surface of the grinding head (8).

3. The silicon nitride grinding apparatus according to claim 2, characterized in that: The upper surface of the grinding disc (9) is provided with a discharge port, and the upper surface of the discharge port is provided with a filter screen. The second scraper (308) is rotatably mounted on the upper surface of the filter screen. A second torsion spring is provided between the second scraper (308) and the filter screen. A second spring is provided between the slide plate (304) and the conical cylinder (2). The rotation of the first scraper (307) will push the second scraper (308) to rotate and scrape the surface of the filter screen. The rotation of the first scraper (307) will push the second rotating rod (306) to rotate. The rotation of the second rotating rod (306) will push the slide plate (304) to move.

4. The silicon nitride grinding apparatus according to claim 3, characterized in that: The spray head (6) is connected to the hydraulic cylinder (301) via a hose. The hose is fixedly installed on the side of the one-way valve (303) near the spray head (6). The water tank (5) is connected to the hydraulic cylinder (301). A pressure control valve is provided at the position where the water tank (5) is connected to the hydraulic cylinder (301). A torsion spring is provided between the second rotating rod (306) and the conical cylinder (2).

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