SIC crystal growth raw material production device

Abstract

The invention discloses an SIC crystal growth raw material production device, and relates to the technical field of silicon carbide crystal growth. The device comprises an outer machine cover, a screening frame is slidably connected to the interior of the outer machine cover, a screening cam is rotatably installed in the outer machine cover and driven by a motor, a screening spring is arranged between the screening frame and the outer machine cover, and an upper screening net and a lower screening net are arranged in the screening frame; a top frame is arranged on the top of the outer machine cover. The cam and the screening spring drive the screening frame to slide left and right, the screening frame drives the upper screening net and the lower screening net to slide left and right, the upper screening net slides left and right relative to the upper stripping plate, large crystals and purification materials can be stripped, the lower screening net slides left and right relative to the lower stripping plate, small crystals and the purification materials can be stripped, and heating is not needed; and the crystal can be quickly stripped from the purification material by utilizing twisting force generated by mutual dislocation of the screening net and the stripping plate.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide crystal growth, and in particular to a device for producing raw materials for SIC crystal growth. Background Art

[0002] During the growth of silicon carbide crystals, the atmosphere inside the crucible is different, rich in silicon in the early stage and rich in carbon in the later stage. These two states are prone to produce impurities such as silicon droplets and carbon inclusions, leading to crystal defects. In order to reduce the occurrence of the above situation, purification materials are usually set above the silicon carbide powder in the crucible. The purification materials can inhibit the generation of silicon atoms and carbon atoms, thereby reducing the generation of impurities such as silicon droplets and carbon inclusions and improving the yield of crystal growth. The purification materials will be stained with silicon carbide crystals. In order to reduce the cost of use, the used purification materials are generally processed and put into use again.

[0003] A Chinese patent (application number: CN202222868081.X) discloses a screening device for growing silicon carbide crystals, comprising: a shell having a containing cavity formed therein, and a sealing door installed on the side wall of the shell; a heating assembly, the heating assembly being arranged in the containing cavity; a screening mechanism, the screening mechanism comprising a screening frame, a screen assembly, a material conveying pipeline and a power mechanism, the screening frame being arranged in the containing cavity and being rotatably installed on the shell.

[0004] This patent and the prior art have the following technical problems in actual use:

[0005] 1. This patent heats the used purification material by heating the heating component to assist in the separation of silicon carbide crystals from the purification material. The equipment needs to increase the heat to achieve good separation. Therefore, it takes a long time to reach the desired temperature, and the separation energy consumption is large;

[0006] 2. This patent can only screen crystals and impurities that are smaller than the purification material, but cannot screen large crystals that are larger than the purification material. Large crystals need to be removed in advance for manual screening, and the screening efficiency is low. Summary of the invention

[0007] The purpose of the present invention is to solve the above problems and provide a device for producing raw materials for SIC crystal growth.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A SIC crystal growth raw material production device comprises an outer cover, a screening frame is slidably connected to the inside of the outer cover, a screening cam is rotatably installed inside the outer cover, the screening cam is driven by a motor, a screening spring is arranged between the screening frame and the outer cover, an upper screening net and a lower screening net are arranged inside the screening frame, the lower screening net is located below the upper screening net, a horizontal slide groove and a vertical slide groove are opened inside the screening frame, the horizontal slide groove is connected to the vertical slide groove, and a buffer bevel is arranged at the connection between the horizontal slide groove and the vertical slide groove;

[0010] The upper and lower screening nets are provided with adjusting cavities, and two sets of lower stripping plates are arranged inside the adjusting cavity, and a horizontal sliding block is rotatably installed at the lower sides of the outer sides of the two sets of lower stripping plates, and the horizontal sliding block is slidably connected to the horizontal sliding groove, and a vertical sliding block is rotatably installed above the outer sides of the two sets of lower stripping plates at the same time, and the vertical sliding block is slidably connected to the vertical sliding groove, and the vertical sliding block can automatically slide up and down along the vertical sliding groove when the two sets of lower stripping plates are horizontal. The vertical sliding block can slide along the horizontal sliding groove, and a stripping cavity is formed between the lower stripping plates and the lower screening net, and a scraper is arranged at one end of the two sets of lower stripping plates away from the vertical sliding block, and the scraper can automatically slide along the lower stripping plates, and a retaining edge is arranged at one end of the scraper away from the vertical sliding block. The front and back sides of the screening frame are both provided with suction ports, and the suction ports are located above the lower screening net, and a suction component is arranged on the outside of the outer machine cover, and the suction component has two sets of suction ports connected at the same time;

[0011] A top frame is arranged on the top of the outer hood, a lifting cylinder is fixedly installed on the top of the top frame, an upper stripping plate is arranged on the bottom of the telescopic end of the lifting cylinder, and a blanking frame is arranged on the bottom of the outer hood.

[0012] Furthermore, two groups of reels are rotatably installed on the inner top of the top frame, and transmission wheels are fixedly installed on the outer sides of the two groups of reels. The two groups of transmission wheels are meshed with each other, and one group of reels is driven by a motor. Driving steel wire ropes are wound on the outer sides of the two groups of reels, and the ends of the driving steel wire ropes away from the reels are connected to the lower stripping plate, and the driving steel wire ropes pass through the upper stripping plate and the upper screening net.

[0013] Furthermore, a telescopic sleeve is fixedly installed on the top of the lower stripping plate, a telescopic rod is slidably connected inside the telescopic sleeve, the telescopic rod is fixedly connected to the scraper, a tension spring is arranged between the telescopic rod and the inner wall of the telescopic sleeve, a rope hole is opened inside the lower stripping plate, the driving wire rope passes through the rope hole and is fixedly connected to one end of the telescopic rod away from the tension spring.

[0014] Furthermore, the top of the scraper is designed to be arc-shaped, and the telescopic sleeve and the telescopic rod are designed to be cylindrical.

[0015] Furthermore, two groups of telescopic sleeves and telescopic rods are arranged on the top of a group of lower peeling plates, and four groups of reels are arranged, and the two groups of reels corresponding to a group of lower peeling plates are connected through a transmission shaft.

[0016] Furthermore, a sliding hole is provided at the bottom of the telescopic end of the lifting cylinder, a sliding column is provided at the top of the upper stripping plate, the sliding column is slidably connected in the sliding hole, and a compression spring is provided between the sliding column and the top of the sliding hole.

[0017] Furthermore, the suction assembly includes a negative pressure machine fixedly installed on the outside of the outer hood, the negative pressure machine is provided with two groups of suction ends, both groups of suction ends are provided with solenoid valves, and both groups of solenoid valves are provided with suction pipes on the outside, suction boxes are provided on the front and back of the outer hood, and a suction pipe is provided on the outside of the suction port, and the suction pipe and the suction pipe are respectively located at both ends of the suction box, and a collecting bag is installed inside the suction box, the suction pipe is connected with the collecting bag, the suction pipe is connected with the suction box, and a sealing door is provided on the outside of the suction box.

[0018] Furthermore, a first slide groove and a second slide groove are formed through the front and back of the outer hood, a guide slider is provided on the outer side of the screening frame, the guide slider is slidably connected in the first slide groove, and the suction pipe is slidably connected in the second slide groove.

[0019] Furthermore, the upper screening net is slidably connected to the screening frame, a pull plate is arranged on the outer side of the upper screening net, a lock buckle is arranged on the outer side of the pull plate, and the lock buckle can be fixed on the screening frame.

[0020] Furthermore, a moving wheel is provided at the bottom of the blanking frame.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention drives the screening frame to slide left and right through the cam and the screening spring, and the screening frame drives the upper screening net and the lower screening net to slide left and right. The upper screening net slides left and right relative to the upper stripping plate to strip large crystals and purification materials, and the lower screening net slides left and right relative to the lower stripping plate to strip small crystals and purification materials. No heating is required, and the friction force generated by the mutual displacement of the screening net and the stripping plate can be used to quickly achieve the separation of crystals and purification materials.

[0023] The two lower stripping plates are moved upwards and the two lower stripping plates are moved downwards and the two lower stripping plates are moved downwards and the two lower stripping plates are moved upward ... BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the whole Figure 1 ;

[0025] Figure 2 The present invention is a schematic diagram of the whole Figure 2 ;

[0026] Figure 3 It is a schematic diagram of the internal structure of the outer hood of the present invention;

[0027] Figure 4 It is a schematic diagram of the screening frame of the present invention;

[0028] Figure 5 It is a schematic diagram of the internal structure of the screening frame of the present invention;

[0029] Figure 6 is a schematic cross-sectional view of the lower peeling plate of the present invention;

[0030] Figure 7 is a schematic cross-sectional view of the upper peeling plate of the present invention;

[0031] Figure 8 is a schematic diagram of the suction assembly of the present invention;

[0032] Fig. 9 It is a schematic diagram of the vertical chute and the horizontal chute of the present invention.

[0033] Reference numerals: 1, outer hood; 11, first slide; 12, second slide; 13, screening cam; 14, screening spring; 2, top frame; 21, lifting cylinder; 22, upper stripping plate; 23, slide column; 24, compression spring; 3, screening frame; 31, guide slider; 32, upper screening net; 321, pull plate; 322, lock; 33, lower screening net; 34, horizontal slide; 35, vertical slide; 35 1. Buffer bevel; 36. Suction port; 4. Feeding frame; 5. Lower stripping plate; 51. Horizontal slider; 52. Vertical slider; 53. Scraper; 54. Telescopic sleeve; 55. Telescopic rod; 56. Tension spring; 57. Driving wire rope; 58. Reel; 59. Transmission wheel; 6. Suction pipe; 61. Negative pressure machine; 62. Solenoid valve; 63. Suction pipe; 64. Suction box; 65. Collection bag; 66. Sealing door. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] A SIC crystal growth raw material production device according to a preferred embodiment of the present invention will be described in detail below.

[0036] Embodiment 1

[0037] like Figure 1-Figure 9 As shown, a SIC crystal growth raw material production device comprises an outer cover 1, a screening frame 3 is slidably connected inside the outer cover 1, a screening cam 13 is rotatably installed inside the outer cover 1, the screening cam 13 is driven by a motor, a screening spring 14 is arranged between the screening frame 3 and the outer cover 1, an upper screening net 32 ​​and a lower screening net 33 are arranged inside the screening frame 3, the lower screening net 33 is located below the upper screening net 32, a horizontal slide 34 and a vertical slide 35 are opened inside the screening frame 3, the horizontal slide 34 is connected to the vertical slide 35, and a buffer bevel 351 is arranged at the connection between the horizontal slide 34 and the vertical slide 35;

[0038] The upper screening net 32 ​​and the lower screening net 33 are provided with an adjustment cavity, and two groups of lower stripping plates 5 are provided inside the adjustment cavity. A horizontal slider 51 is rotatably installed below the outer sides of the two groups of lower stripping plates 5, and the horizontal slider 51 is slidably connected in the horizontal slide groove 34. A vertical slider 52 is rotatably installed above the outer sides of the two groups of lower stripping plates 5 at the same time, and the vertical slider 52 is slidably connected in the vertical slide groove 35. The vertical slider 52 can automatically slide up and down along the vertical slide groove 35. When the two groups of lower stripping plates 5 are horizontal, the vertical slider 52 It can slide along the horizontal slide 34, and a stripping cavity is formed between the lower stripping plate 5 and the lower screening net 33. The two groups of lower stripping plates 5 are provided with a scraper 53 at one end away from the vertical slider 52. The scraper 53 can automatically slide along the lower stripping plate 5. The scraper 53 is provided with a retaining edge at one end away from the vertical slider 52. The front and back sides of the screening frame 3 are provided with suction ports 36, which are located above the lower screening net 33. A suction assembly is provided on the outside of the outer cover 1, and the two groups of suction ports 36 are connected to the suction assembly at the same time.

[0039] A top frame 2 is provided on the top of the outer hood 1 , a lifting cylinder 21 is fixedly installed on the top of the top frame 2 , an upper stripping plate 22 is provided at the bottom of the telescopic end of the lifting cylinder 21 , and a blanking frame 4 is provided at the bottom of the outer hood 1 .

[0040] The upper screening net 32 ​​can pass the purification material stained with small crystals, and the purification material cannot pass the lower screening net 33. When in use, the mixed purification material is poured onto the upper screening net 32, and the vertical slider 52 is controlled to rise. The vertical slider 52 drives the two sets of lower stripping plates 5 to be vertically close together. At this time, the equipment is started, and the motor drives the screening cam 13 to rotate. The screening cam 13 cooperates with the screening spring 14 to drive the screening frame 3 to slide left and right. The screening frame 3 drives the upper screening net 32 ​​and the lower screening net 33 to swing left and right, and the purification material stained with small crystals, the purification material not stained with crystals and the small crystals fall through the upper screening net 32. The purified materials with small crystals and the purified materials without crystals are accumulated on the lower screening net 33, and the small crystals fall into the material discharge frame 4 to complete the preliminary screening of the materials. Then the vertical slider 52 is controlled to slide downward, and the vertical slider 52 drives the two groups of lower stripping plates 5 to unfold to a nearly horizontal state. At the same time, since the connection position between the horizontal slider 51 and the lower stripping plate 5 is located at the bottom end of the lower stripping plate 5, when the lower stripping plate 5 is vertically closed, the bottom end of the lower stripping plate 5 is lifted upward relative to the lower screening net 33, and the distance between the lower end of the lower stripping plate 5 and the lower screening net 33 is greater than the diameter of the purified materials. Figure 6As shown, when the lower stripping plate 5 is unfolded, there is enough space between its lower end and the lower screening net 33, and the lower stripping plate 5 flattens the material on the lower screening net 33 without pushing the material away from the lower screening net 33. At this time, the vertical slider 52 slides into the buffer bevel 351 and the horizontal slide groove 34. As the lower screening net 33 slides left and right, the vertical slider 52 slides slightly in the buffer bevel 351, and the lower screening net 33 can stably move relative to the lower stripping plate 5 by a small distance, and the small crystals on the purification material are initially rubbed off. As the small crystals are rubbed off, the two groups of lower stripping plates 5 gradually become horizontal. When the lower stripping plate 5 is completely horizontal, the space between the lower stripping plate 5 and the lower screening net 33 can just accommodate the purification material, completing the purification material screening below.

[0041] At the same time, the lifting cylinder 21 is controlled to operate, and the lifting cylinder 21 drives the upper stripping plate 22 to gradually descend. When the upper stripping plate 22 is pressed on the purification material, the upper screening net 32 ​​is displaced relative to the upper stripping plate 22, and the large crystal grains are stripped from the purification material. The stripped purification material passes through the upper screening net 32 ​​and falls onto the lower stripping plate 5. The purification material will not fall onto the lower screening net 33 due to the blocking of the scraper 53 and its retaining edge. At this time, the purification material may be mixed with crystal grains of the same size as the purification material, and directly falling onto the lower screening net 33 will affect the screening effect of the lower screening net 33. Therefore, the isolation of the lower stripping plate 5 can prevent mutual mixing.

[0042] After screening for a period of time, the screening cam 13 stops rotating, controls the scraper 53 to slide relative to the lower stripping plate 5, and then controls the vertical slider 52 to rise. The vertical slider 52 drives the two groups of lower stripping plates 5 to vertically close together in the middle. The scraper 53 scrapes the purified material to the suction port 36 position, and the suction component sucks out the purified material. When the lower stripping plates 5 are vertically closed together, the purified material is completely sucked out, and the purified material above the lower stripping plates 5 falls onto the lower screening net 33. The vertical slider 52 is controlled to descend and rise again, and the suction component sucks out the purified material. The purified material may be mixed with a small amount of crystals of the same size. Due to the small amount, it can be easily picked out, thereby completing the efficient separation of the purified material and the crystal, and the screening efficiency is high.

[0043] Embodiment 2 provides a vertical slider 52 driving structure based on embodiment 1;

[0044] like Figure 4-Figure 6 Two sets of reels 58 are rotatably installed on the inner top of the top frame 2, and transmission wheels 59 are fixedly installed on the outer sides of the two sets of reels 58. The two sets of transmission wheels 59 are meshed with each other, and one set of reels 58 is driven by a motor. Driving steel wire ropes 57 are wound around the outer sides of the two sets of reels 58. The end of the driving steel wire rope 57 away from the reel 58 is connected to the lower stripping plate 5, and the driving steel wire rope 57 passes through the upper stripping plate 22 and the upper screening net 32.

[0045] By controlling the motor to rotate, the motor drives the reel 58 to rotate, and the reel 58 reels in the driving wire rope 57, which drives the lower stripping plate 5 to move upward, and the lower stripping plate 5 drives the vertical slider 52 to slide upward. When the control reel 58 is reversed, the lower stripping plate 5 and the vertical slider 52 descend and unfold under the action of gravity. Due to the soft transmission of the driving wire rope 57, when the vertical slider 52 is located in the vertical slide groove 35, the screening frame 3 slides left and right relative to the reel 58, the screening frame 3 drives the lower stripping plate 5 and the screening frame 3 to slide left and right synchronously through the vertical slide groove 35, which does not affect the preliminary screening and has a good transmission effect.

[0046] Embodiment 3, based on the above embodiment, provides a scraper 53 telescopic structure:

[0047] like Figure 4-Figure 6 As shown, a telescopic sleeve 54 is fixedly installed on the top of the lower stripping plate 5, and a telescopic rod 55 is slidably connected inside the telescopic sleeve 54. The telescopic rod 55 is fixedly connected to the scraper 53, and a tension spring 56 is arranged between the telescopic rod 55 and the inner wall of the telescopic sleeve 54. A rope hole is opened inside the lower stripping plate 5, and a driving wire rope 57 passes through the rope hole and is fixedly connected to one end of the telescopic rod 55 away from the tension spring 56.

[0048] By controlling the motor to rotate, the motor drives the reel 58 to rotate, and the reel 58 reels in the driving wire rope 57. The driving wire rope 57 first drives the telescopic rod 55 to extend, and the telescopic rod 55 drives the scraper 53 to slide downward, and the scraper 53 presses on the lower screening net 33 to rise, and then the driving wire rope 57 drives the lower stripping plate 5 to move upward, and the lower stripping plate 5 drives the vertical slider 52 to slide upward. Since the distance between the bottom end of the lower stripping plate 5 and the lower screening net 33 always changes when the lower stripping plate 5 rises, the distance between the scraper 53 and the lower screening net 33 changes, and the driving wire rope 57 gives the scraper 53 a continuous driving force, so the scraper The plate 53 is always stably attached to the lower screening net 33 to ensure a good scraping effect. When the control reel 58 is reversed, the driving wire rope 57 is relaxed, and the tension spring 56 drives the telescopic rod 55 to retract into the telescopic sleeve 54. The telescopic rod 55 drives the scraper 53 away from the lower screening net 33 without affecting the lower stripping plate 5 to flatten the material. At the same time, the lower stripping plate 5 and the vertical slider 52 are lowered and unfolded under the action of gravity. Therefore, when the lower stripping plate 5 is close together, the scraper 53 automatically presses on the lower screening net 33. When the lower stripping plate 5 is unfolded, the scraper 53 automatically moves away from the lower screening net 33. No additional drive control is required, and the structure is compact.

[0049] Furthermore, the top of the scraper 53 is designed to be arc-shaped, and the telescopic sleeve 54 and the telescopic rod 55 are designed to be cylindrical, so as to prevent material from accumulating on the surfaces of the scraper 53, the telescopic sleeve 54 and the telescopic rod 55, and the lower stripping plate 5 is close together for a good discharge effect.

[0050] Furthermore, two sets of telescopic sleeves 54 and telescopic rods 55 are arranged on the top of a set of lower stripping plates 5, and four sets of rollers 58 are arranged. The two sets of rollers 58 corresponding to a set of lower stripping plates 5 are connected through a transmission shaft, so that the scraper 53 can run more stably.

[0051] Embodiment 4

[0052] like Figure 7 As shown, a sliding hole is provided at the bottom of the telescopic end of the lifting cylinder 21, a sliding column 23 is provided at the top of the upper stripping plate 22, the sliding column 23 is slidably connected in the sliding hole, and a compression spring 24 is provided between the sliding column 23 and the top of the sliding hole.

[0053] According to the configuration of this embodiment, the peeling distance between the upper peeling plate 22 and the upper screening net 32 ​​can be automatically changed by controlling the lifting cylinder 21 to descend a fixed distance without continuous descending, thereby achieving better peeling effect and convenient control.

[0054] Embodiment 5

[0055] like Figure 1-Figure 8 As shown, the suction assembly includes a negative pressure machine 61 fixedly mounted on the outside of the outer hood 1, two groups of suction ends of the negative pressure machine 61 are provided, both groups of suction ends are provided with solenoid valves 62, and suction pipes 63 are provided on the outside of the two groups of solenoid valves 62, suction boxes 64 are provided on the front and back of the outer hood 1, and a suction pipe 6 is provided on the outside of the suction port 36, and the suction pipe 6 and the suction pipe 63 are respectively located at the two ends of the suction box 64, and a collecting bag 65 is installed inside the suction box 64, the suction pipe 6 is connected to the collecting bag 65, the suction pipe 63 is connected to the suction box 64, and a sealing door 66 is provided on the outside of the suction box 64.

[0056] After screening for a period of time, the screening cam 13 stops rotating, controls the scraper 53 to slide relative to the lower stripping plate 5, and then controls the vertical slider 52 to rise, and the vertical slider 52 drives the two groups of lower stripping plates 5 to vertically close together in the middle, and the scraper 53 scrapes the purified material to the position of the suction port 36. At this time, the front solenoid valve 62 is controlled to open, and the front suction pipe 63 causes the suction box 64 to generate negative pressure, and the suction box 64 causes the suction pipe 6 to generate negative pressure, and the suction pipe 6 sucks out the purified material, and the purified material is collected in the collecting bag 65. When the lower stripping plates 5 are vertically closed together, the purified material is completely sucked out, and the purified material above the lower stripping plate 5 falls onto the lower screening net 33, and the vertical slider 52 is controlled to descend and rise again. At this time, the solenoid valve 62 on the back is controlled to open, and the purified material is sucked out into the collecting bag 65 on the back, which is convenient for collection. The sealing door 66 is opened to take out the collecting bag 65.

[0057] Furthermore, a first slide groove 11 and a second slide groove 12 are formed through the front and back of the outer hood 1, and a guide slider 31 is provided on the outer side of the screening frame 3. The guide slider 31 is slidably connected in the first slide groove 11, and the suction pipe 6 is slidably connected in the second slide groove 12.

[0058] The front and back of the screening frame 3 are closely attached to the inner wall of the outer hood 1, and the material will not be discharged through the vertical chute 35 and the horizontal chute 34, and the first chute 11 and the second chute 12 are never connected with the vertical chute 35 and the horizontal chute 34, so as to ensure that the material will not leak out.

[0059] Embodiment 6

[0060] like Figure 1-Figure 4 As shown, the upper screening net 32 ​​is slidably connected in the screening frame 3, a pull plate 321 is provided on the outer side of the upper screening net 32, and a lock buckle 322 is provided on the outer side of the pull plate 321. The lock buckle 322 can be fixed on the screening frame 3 to facilitate dumping of large crystals on the upper screening net 32.

[0061] Furthermore, moving wheels are provided at the bottom of the blanking frame 4 to facilitate moving the blanking frame 4 .

[0062] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A SIC crystal growth raw material production device, comprising an outer cover (1), characterized in that: The outer hood (1) is internally slidably connected with a screening frame (3), the outer hood (1) is internally rotatably mounted with a screening cam (13), the screening cam (13) is driven by a motor, a screening spring (14) is arranged between the screening frame (3) and the outer hood (1), an upper screening net (32) and a lower screening net (33) are arranged inside the screening frame (3), the lower screening net (33) is located below the upper screening net (32), a horizontal slide groove (34) and a vertical slide groove (35) are arranged inside the screening frame (3), the horizontal slide groove (34) and the vertical slide groove (35) are connected, and a buffer bevel (351) is arranged at the connection between the horizontal slide groove (34) and the vertical slide groove (35); The upper screening net (32) and the lower screening net (33) are provided with an adjustment cavity, and two groups of lower stripping plates (5) are provided inside the adjustment cavity. A horizontal slider (51) is rotatably installed below the outer sides of the two groups of lower stripping plates (5), and the horizontal slider (51) is slidably connected in the horizontal slide groove (34). A vertical slider (52) is rotatably installed above the outer sides of the two groups of lower stripping plates (5), and the vertical slider (52) is slidably connected in the vertical slide groove (35). The vertical slider (52) can automatically slide up and down along the vertical slide groove (35). When the two groups of lower stripping plates (5) are horizontal, the vertical slider (52) It can slide along the horizontal slide groove (34), and a stripping cavity is formed between the lower stripping plate (5) and the lower screening net (33). The two groups of lower stripping plates (5) are provided with a scraper (53) at one end away from the vertical slider (52). The scraper (53) can slide automatically along the lower stripping plate (5). The scraper (53) is provided with a retaining edge at one end away from the vertical slider (52). The front and back sides of the screening frame (3) are both provided with suction ports (36). The suction ports (36) are located above the lower screening net (33). The outer side of the outer machine cover (1) is provided with a suction assembly. The suction assembly simultaneously connects the two groups of suction ports (36). A top frame (2) is arranged on the top of the outer hood (1), a lifting cylinder (21) is fixedly mounted on the top of the top frame (2), an upper stripping plate (22) is arranged at the bottom of the telescopic end of the lifting cylinder (21), and a blanking frame (4) is arranged at the bottom of the outer hood (1).

2. The SIC crystal growth raw material production device according to claim 1, characterized in that: Two groups of reels (58) are rotatably mounted on the inner top of the top frame (2), and transmission wheels (59) are fixedly mounted on the outer sides of the two groups of reels (58). The two groups of transmission wheels (59) are meshed with each other, and one group of reels (58) is driven by a motor. Driving steel wire ropes (57) are wound around the outer sides of the two groups of reels (58). One end of the driving steel wire rope (57) away from the reels (58) is connected to the lower stripping plate (5), and the driving steel wire rope (57) passes through the upper stripping plate (22) and the upper screening net (32).

3. The SIC crystal growth raw material production device according to claim 2, characterized in that: A telescopic sleeve (54) is fixedly installed on the top of the lower stripping plate (5), and a telescopic rod (55) is slidably connected inside the telescopic sleeve (54). The telescopic rod (55) is fixedly connected to the scraper (53), and a tension spring (56) is arranged between the telescopic rod (55) and the inner wall of the telescopic sleeve (54). A rope hole is opened inside the lower stripping plate (5), and the driving wire rope (57) passes through the rope hole and is fixedly connected to one end of the telescopic rod (55) away from the tension spring (56).

4. The SIC crystal growth raw material production device according to claim 3, characterized in that: The top of the scraper (53) is designed to be arc-shaped, and the telescopic sleeve (54) and the telescopic rod (55) are designed to be cylindrical.

5. The SIC crystal growth raw material production device according to claim 4, characterized in that: Two groups of telescopic sleeves (54) and telescopic rods (55) are arranged on the top of one group of lower peeling plates (5), and four groups of reels (58) are arranged. The two groups of reels (58) corresponding to one group of lower peeling plates (5) are connected through a transmission shaft.

6. The SIC crystal growth raw material production device according to claim 1, characterized in that: A sliding hole is provided at the bottom of the telescopic end of the lifting cylinder (21), a sliding column (23) is provided at the top of the upper stripping plate (22), the sliding column (23) is slidably connected in the sliding hole, and a compression spring (24) is provided between the sliding column (23) and the top of the sliding hole.

7. The SIC crystal growth raw material production device according to claim 1, characterized in that: The suction assembly comprises a negative pressure machine (61) fixedly mounted on the outside of the outer hood (1); the negative pressure machine (61) is provided with two groups of suction ends, both of which are provided with solenoid valves (62); suction pipes (63) are provided on the outside of the two groups of solenoid valves (62); suction boxes (64) are provided on the front and back of the outer hood (1); a suction pipe (6) is provided on the outside of the suction port (36); the suction pipe (6) and the suction pipe (63) are respectively located at two ends of the suction box (64); a collecting bag (65) is installed inside the suction box (64); the suction pipe (6) is connected to the collecting bag (65); the suction pipe (63) is connected to the suction box (64); and a sealing door (66) is provided on the outside of the suction box (64).

8. The SIC crystal growth raw material production device according to claim 7, characterized in that: The front and back sides of the outer hood (1) are both penetrated by a first slide groove (11) and a second slide groove (12); a guide slider (31) is provided on the outer side of the screening frame (3); the guide slider (31) is slidably connected in the first slide groove (11); and the suction pipe (6) is slidably connected in the second slide groove (12).

9. The SIC crystal growth raw material production device according to claim 1, characterized in that: The upper screening net (32) is slidably connected in the screening frame (3); a pull plate (321) is provided on the outer side of the upper screening net (32); a lock buckle (322) is provided on the outer side of the pull plate (321); and the lock buckle (322) can be fixed on the screening frame (3).

10. The SIC crystal growth raw material production device according to claim 1, characterized in that: The bottom of the blanking frame (4) is provided with moving wheels.

Images