A crystal growth system and method of growing the same

Abstract

The application discloses a crystal growth system and a growth method thereof, wherein the growth system comprises a crystal growth furnace, a cutting and unloading device and a raw material feeding device; the cutting and unloading device comprises a telescopic mechanism, a clamping mechanism and a cutting mechanism; and the raw material feeding device comprises a lifting crucible mechanism, a translation pushing mechanism and a quantitative conveying mechanism. The crystal growth system and the growth method thereof utilize the raw material feeding device to quantitatively feed raw materials into the lifting crucible mechanism, so that manual feeding of raw materials is not needed every time the crystal growth furnace is opened, and the production efficiency of crystals is improved; the cutting and unloading device can cut and take out the well-grown crystal ball, so that manual cutting and taking out are not needed every time the crystal growth furnace is opened, and the production efficiency of crystals is further improved; and the clamping mechanism is used for wrapping clamping the lower end of a seed crystal rod, which can reduce the flying of cutting dust on one hand and ensure the stability during cutting on the other hand.

Description

Technical Field

[0001] This invention relates to a crystal production apparatus and method, and more particularly to a crystal growth system and its growth method. Background Technology

[0002] Among existing methods for preparing artificial crystals, the Czochralski method is a common approach, allowing for the growth of high-quality single-crystal materials from a melt. The Czochralski method has been applied to the growth of important artificial crystal materials such as sapphire, yttrium aluminum garnet, silicon-germanium, and calcium fluoride. Compared to other crystal growth techniques, Czochralski-grown crystals exhibit lower dislocation density, higher optical uniformity, and lower internal stress.

[0003] Crystal growth furnaces are the main equipment for artificial crystal preparation. However, existing crystal growth furnaces have relatively simple structures, and operations such as cutting crystal rods and adding raw materials are all done manually. Each time the furnace is started, it needs to be completely shut down, resulting in significant energy loss and low crystal preparation efficiency. Therefore, it is necessary to design a crystal growth system and its growth method that can enhance the automated management of crystal growth, reduce manual intervention, and effectively improve crystal preparation efficiency. Summary of the Invention

[0004] Purpose of the invention: To provide a crystal growth system and method that can enhance the automated management of crystal growth, reduce manual intervention, and effectively improve the efficiency of crystal preparation.

[0005] Technical Solution: The crystal growth system of the present invention includes a crystal growth furnace, a cutting and unloading device, and a raw material feeding device; the cutting and unloading device includes a telescopic mechanism, a clamping mechanism, and a cutting mechanism; the raw material feeding device includes a lifting crucible mechanism, a translational pushing mechanism, and a quantitative conveying mechanism; the telescopic mechanism is installed on the upper side of the crystal growth furnace, and the clamping mechanism and the cutting mechanism are both installed on the telescopic mechanism. The telescopic mechanism drives the clamping mechanism and the cutting mechanism to enter and exit the crystal growth furnace. The clamping mechanism clamps the lower end of the seed crystal rod in the crystal growth furnace, and the cutting mechanism cuts the lower end of the seed crystal rod; the lifting crucible mechanism is installed on the bottom of the crystal growth furnace, the translational pushing mechanism is installed on the lower side of the crystal growth furnace, and the quantitative conveying mechanism is installed on the translational pushing mechanism. The quantitative conveying mechanism feeds raw material to the translational pushing mechanism, and the translational pushing mechanism pushes the raw material into the lifting crucible mechanism. The lifting crucible mechanism rises and drives the raw material into the heating zone of the crystal growth furnace for heating and melting.

[0006] Furthermore, the crystal growth furnace includes a furnace body, a furnace door, a vacuum pump, a crucible heating mechanism, a lifting mechanism, and a rotating mechanism. The furnace door is hinged at the front opening of the furnace body to seal the front opening. The vacuum pump is connected to the furnace body to evacuate the furnace. The crucible heating mechanism is installed inside the furnace to heat the lifting crucible mechanism. The lifting mechanism is installed through the top of the furnace body, and the rotating mechanism is installed on the lifting mechanism. The upper end of the seed crystal rod is detachably installed on the rotating mechanism. The rotating mechanism drives the seed crystal rod to rotate, and the lifting mechanism raises the height of the rotating mechanism.

[0007] Furthermore, the lifting mechanism includes a lifting bracket, a lifting drive motor, a lifting drive tube, and a lifting drive seat; the rotating mechanism includes a rotating drive rod and a rotating drive motor; the lifting drive seat is rotatably mounted on the lifting bracket, the upper end of the lifting drive tube is vertically slidably mounted on the lifting bracket, and the lower end of the lifting drive tube penetrates the top of the crystal growth furnace; the lifting drive tube is threadedly mounted on the lifting drive seat, and the lifting drive motor drives the lifting drive seat to rotate via a worm gear; the rotating drive rod is rotatably mounted on the lifting drive tube, and the rotating drive motor is used to drive the rotating drive rod to rotate; the upper end of the seed crystal rod is detachably mounted on the lower end of the rotating drive rod.

[0008] Furthermore, the lifting crucible mechanism includes a lifting drive unit and a crucible; the crucible is mounted on the lifting drive unit and is located inside the crystal growth furnace. The lifting drive unit is installed through the bottom of the crystal growth furnace, and the height of the crucible is adjusted by the lifting drive unit.

[0009] Furthermore, the translation and pushing mechanism includes a translation pipe, a translation drive unit, and a pushing hopper; the translation pipe is installed through the lower part of the crystal growth furnace, and the pushing hopper is slidably installed inside the translation pipe; the translation drive unit is used to translate the pushing hopper out of the translation pipe to above the loading side of the lifting crucible mechanism.

[0010] Furthermore, the quantitative conveying mechanism includes a raw material bin and a screw conveyor unit; the discharge port of the screw conveyor unit is connected to a translational pipe for conveying raw materials to the push hopper; the inlet of the screw conveyor unit is connected to the bottom of the raw material bin.

[0011] Furthermore, the telescopic mechanism includes a discharge channel, a telescopic drive unit, and a U-shaped frame; the discharge channel is installed on the upper side of the crystal growth furnace, and the upper and lower side frames of the U-shaped frame are slidably installed on the upper and lower inner walls of the discharge channel, respectively; the telescopic drive unit is used to drive the U-shaped frame to slide along the discharge channel; the clamping mechanism and the cutting mechanism are both installed on the U-shaped frame; a material picking window is provided on the lower side of the discharge channel, and a window cover is detachably installed at the material picking window.

[0012] Furthermore, the clamping mechanism includes an opening and closing drive unit and two clamping covers; the top corners of the clamping edges on the upper and lower sides of the two clamping covers are respectively rotatably mounted on the upper and lower side frames of the U-shaped frame; the opening and closing drive unit is mounted on the lower side frame of the U-shaped frame and is used to push and pull the two clamping covers to open and close synchronously; a clamping positioning slot for clamping the lower end of the seed crystal rod is provided in the middle of the clamping edge on the upper side of the two clamping covers.

[0013] Furthermore, the cutting mechanism includes a feed drive unit, a cutting drive unit, and a rotary cutting blade; a feed window is provided on each of the two clamping covers opposite to the cutting mechanism; the rotary cutting blade is rotatably mounted on the end of the feed drive unit, and the feed drive unit pushes the rotary cutting blade through the feed window to cut; the cutting drive unit is used to drive the rotary cutting blade to rotate.

[0014] The present invention also provides a growth method for a crystal growth system, comprising the following steps:

[0015] Step 1, System preparation: Install the seed crystal rod on the rotating mechanism of the crystal growth furnace, and then drive the seed crystal rod down by the lifting mechanism of the crystal growth furnace so that the lower end of the seed crystal rod extends into the heating zone of the crucible heating mechanism of the crystal growth furnace. Then load the raw material into the raw material box of the quantitative conveying mechanism, seal the crystal growth furnace, and use the vacuum pump of the crystal growth furnace to evacuate the crystal growth furnace.

[0016] Step 2, Raw material loading: The lifting drive unit of the lifting crucible mechanism drives the crucible to descend to the loading side. The quantitative conveying mechanism quantitatively conveys the raw material into the pushing hopper of the translation pushing mechanism. Then, the translation pushing mechanism moves the pushing hopper to above the loading side of the crucible, so that the raw material in the pushing hopper falls into the crucible. Then, the lifting drive unit drives the crucible to rise into the heating zone of the crucible heating mechanism, and the lower end of the seed crystal rod extends into the crucible.

[0017] Step 3, Crystal growth: The crucible is heated at high frequency by the crucible heating mechanism of the crystal growth furnace, so that the raw material inside the crucible melts. The lifting mechanism and the rotating mechanism of the crystal growth furnace work together to continuously rotate and lift the seed crystal rod to achieve the growth of crystal spheres.

[0018] Step 4, Cutting and Unloading: The crystal ball is moved upward from the heating zone of the crucible heating mechanism to a set height by the lifting mechanism of the crystal growth furnace; then the telescopic mechanism pushes the clamping mechanism into the crystal growth furnace, and the clamping mechanism clamps the lower end of the seed crystal rod, so that the crystal ball is located in the two clamping covers of the clamping mechanism; then the feed drive unit of the cutting mechanism pushes the rotating cutting blade into the two clamping covers, and the feed drive unit and the cutting drive unit of the cutting mechanism work together to drive the rotating cutting blade to cut the lower end of the seed crystal rod, so that the crystal ball falls into the two clamping covers; then the telescopic mechanism pulls the clamping mechanism into the unloading channel of the telescopic mechanism, and then the clamping mechanism drives the two clamping covers to open, so that the crystal ball falls into the unloading window on the lower side of the unloading channel, and the window cover is opened to remove the crystal ball;

[0019] Step 5, System Check: Check if the length of the seed crystal rod meets the requirements for the next growth. If it does, continue using it; if not, replace it. Check if there is enough raw material in the raw material box of the quantitative conveying mechanism. If not, replenish the raw material. After the check is completed, return to Step 2.

[0020] Compared with the prior art, the beneficial effects of this invention are as follows: the raw material feeding device can quantitatively feed raw materials into the lifting crucible mechanism, thus eliminating the need for manual feeding of raw materials each time the crystal growth furnace is opened, thereby improving the crystal production efficiency; the cutting and unloading device can cut the lower end of the seed crystal rod to obtain well-grown crystal spheres, eliminating the need for manual removal and cutting each time the crystal growth furnace is opened, further improving the crystal production efficiency; the clamping mechanism can wrap and clamp the lower end of the seed crystal rod, which can reduce the flying of cutting dust on the one hand, and ensure the stability during cutting on the other hand. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall system structure of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of the system structure of the present invention;

[0023] Figure 3 This is a top view of the clamping mechanism of the present invention.

[0024] Figure 4 This is a schematic diagram of the circuit structure of the present invention. Detailed Implementation

[0025] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0026] Example 1:

[0027] like Figure 1-4As shown, the crystal growth system disclosed in this invention includes: a crystal growth furnace, a cutting and unloading device, and a raw material feeding device; the cutting and unloading device includes a telescopic mechanism, a clamping mechanism, and a cutting mechanism; the raw material feeding device includes a lifting crucible mechanism, a translational pushing mechanism, and a quantitative conveying mechanism; the telescopic mechanism is installed on the upper side of the crystal growth furnace, and the clamping mechanism and the cutting mechanism are both installed on the telescopic mechanism. The telescopic mechanism drives the clamping mechanism and the cutting mechanism to enter and exit the crystal growth furnace. The clamping mechanism clamps the lower end of the seed crystal rod 21 in the crystal growth furnace, and the cutting mechanism cuts the lower end of the seed crystal rod 21; the lifting crucible mechanism is installed on the bottom of the crystal growth furnace, the translational pushing mechanism is installed on the lower side of the crystal growth furnace, and the quantitative conveying mechanism is installed on the translational pushing mechanism. The quantitative conveying mechanism feeds raw material to the translational pushing mechanism, and the translational pushing mechanism pushes the raw material into the lifting crucible mechanism. The lifting crucible mechanism rises and drives the raw material into the heating zone of the crystal growth furnace for heating and melting.

[0028] The raw material feeding device can quantitatively feed raw materials into the lifting crucible mechanism, eliminating the need for manual feeding each time the crystal growth furnace is opened, thus improving crystal production efficiency. The cutting and unloading device can cut the lower end of the seed crystal rod 21 to obtain the grown crystal ball 22, eliminating the need for manual removal and cutting each time the crystal growth furnace is opened, further improving crystal production efficiency. The clamping mechanism can wrap and clamp the lower end of the seed crystal rod 21, which can reduce the flying of cutting dust and ensure stability during cutting.

[0029] Furthermore, the crystal growth furnace includes a furnace body 1, a furnace door 2, a vacuum pump 4, a crucible heating mechanism, a lifting mechanism, and a rotating mechanism; the furnace door 2 is hinged to the front furnace opening of the furnace body 1 to seal the front furnace opening; the vacuum pump 4 is connected to the furnace body 1 to evacuate the furnace body 1; the crucible heating mechanism is installed inside the furnace body 1 to heat the lifting crucible mechanism; the lifting mechanism is installed through the top of the furnace body 1, the rotating mechanism is installed on the lifting mechanism, and the upper end of the seed crystal rod 21 is detachably installed on the rotating mechanism, the rotating mechanism drives the seed crystal rod 21 to rotate, and the lifting mechanism raises the height of the rotating mechanism.

[0030] Furthermore, the furnace body 1 is fixedly mounted on the support base plate 28 by vertical support legs 29, thereby effectively increasing the height of the furnace body 1 from the ground and ensuring the stability of the furnace body 1; a latch 30 is provided at the corresponding position of the furnace body 1 and the furnace door 2, so as to achieve the sealing and locking of the furnace body 1 and the furnace door 2 by locking bolts; a glass window 31 for easy observation is also provided on the furnace door 2; a sealing ring 32 is provided on the inner edge of the furnace door 2 to achieve the sealing function after closing.

[0031] Furthermore, the crucible heating mechanism includes a heating coil 6 and an insulating cylinder 5; the insulating cylinder 5 is vertically fixedly installed on the inner bottom of the furnace body 1; the heating coil 6 is located on the outer side of the upper opening of the insulating cylinder 5, and is used to heat the crucible 52 after it has been raised and positioned; the crucible 52 is located inside the insulating cylinder 5 and can move up and down within the insulating cylinder 5. The insulating cylinder 5 enhances the heat preservation performance of the crucible 52.

[0032] Furthermore, the pulling mechanism includes a pulling bracket, a pulling drive motor 15, a pulling drive tube 12, and a pulling drive seat 16; the rotating mechanism includes a rotating drive rod 9 and a rotating drive motor 8; the pulling drive seat 16 is rotatably mounted on the pulling bracket, the upper end of the pulling drive tube 12 is vertically slidably mounted on the pulling bracket, and the lower end of the pulling drive tube 12 penetrates the top of the crystal growth furnace; the pulling drive tube 12 is threadedly mounted on the pulling drive seat 16, and the pulling drive motor 15 drives the pulling drive seat 16 to rotate via a worm gear; the rotating drive rod 9 is rotatably mounted on the pulling drive tube 12, and the rotating drive motor 8 drives the rotating drive rod 9 to rotate; the upper end of the seed crystal rod 21 is detachably mounted on the sleeve 20 at the lower end of the rotating drive rod 9. The pulling mechanism allows for upward micro-pulling of the rotating drive rod 9, thereby enabling the rotating drive rod 9 to have rotational and axial movement capabilities, meeting the requirements of pull-type crystal growth.

[0033] Furthermore, the lifting support includes two vertical support rods 7 and a lifting beam 10. The two vertical support rods 7 are vertically fixed to the top of the furnace body 1, and each of the two vertical support rods 7 has a guide groove vertically provided on its opposite side. The two ends of the lifting beam 10 are slidably installed in the two guide grooves through lifting sliders 11. The upper end of the lifting drive tube 12 is fixedly installed through the middle of the lifting beam 10. By utilizing the cooperation of the guide grooves and the lifting sliders 11, the lifting beam 10 can be stably lifted and lowered, thereby ensuring the stable lifting and lowering of the lifting drive tube 12.

[0034] Furthermore, a gear housing 14 is fixedly installed between the two vertical support rods 7, and a lifting drive seat 16 is rotatably installed inside the gear housing 14 via a support bearing; a lifting drive threaded hole is provided at the center of the lifting drive seat 16, and a lifting drive external thread 13 is provided on the outer wall of the lifting drive tube 12. The lifting drive external thread 13 cooperates with the lifting drive threaded hole to achieve through-thread installation of the lifting drive tube 12.

[0035] Furthermore, the worm gear includes a lifting drive worm wheel 17 and a lifting drive worm 18. The lifting drive worm 18 is rotatably mounted inside the gear housing 14, and the lifting drive motor 15 drives the lifting drive worm 18 to rotate. The lifting drive worm wheel 17 is fixedly mounted on the lifting drive seat 16 and meshes with the lifting drive worm 18. By utilizing the cooperation of the lifting drive worm wheel 17 and the lifting drive worm 18, precise rotational drive of the lifting drive seat 16 can be achieved. Then, through the cooperation of the lifting drive external thread 13 and the lifting drive threaded hole, precise control of the lifting height of the rotating drive rod 9 can be achieved.

[0036] Furthermore, the lifting crucible mechanism includes a lifting drive unit and a crucible 52. The crucible 52 is mounted on the lifting drive unit and is located inside the crystal growth furnace. The lifting drive unit is installed through the bottom of the crystal growth furnace and drives the adjustment of the height of the crucible 52. A conical pot opening slope 53 is provided at the upper open edge of the crucible 52 to allow the raw material to fall smoothly into the crucible 52. The lifting drive unit can drive the crucible 52 to move up and down, thereby switching back and forth between the feeding side and the heating zone.

[0037] Furthermore, the lifting drive unit includes a lifting drive motor 23, a lifting drive screw 24, and a lifting internal threaded tube 26; the upper end of the lifting internal threaded tube 26 passes through the furnace body 1 and the insulation cylinder 5, and is fixedly installed on the lower side of the crucible 52; the upper end of the lifting drive screw 24 is threadedly installed inside the lifting internal threaded tube 26, and the lower end is rotatably installed on the support base plate 28; the lifting drive motor 23 drives the lifting drive screw 24 to rotate through the sprocket transmission mechanism 25.

[0038] Furthermore, a support sleeve 27 is vertically fixedly installed on the bottom of the furnace body 1, and the lifting internal threaded pipe 26 passes through the support sleeve 27; a lifting guide groove is vertically provided on the outer wall of the lifting internal threaded pipe 26, and a lifting guide slider is provided on the inner wall of the support sleeve 27 that is slidably embedded in the lifting guide groove, thereby effectively enhancing the stability of the lifting internal threaded pipe 26 during lifting movement.

[0039] Furthermore, the translation and pushing mechanism includes a translation pipe 60, a translation drive unit, and a pushing hopper 54; the translation pipe 60 is installed through the lower part of the crystal growth furnace, and the pushing hopper 54 is slidably installed inside the translation pipe 60; the translation drive unit is used to translate the pushing hopper 54 out of the translation pipe 60 to above the feeding side of the lifting crucible mechanism; the translation pipe 60 is connected to the lower part of the heat preservation cylinder 5.

[0040] Furthermore, a hopper 55 for loading raw materials is provided in the middle of the push hopper 54, and a conical funnel hole 56 is provided at the bottom of the hopper 55 for feeding raw materials into the crucible 52.

[0041] Furthermore, the translation drive unit includes a translation drive motor 59, a translation drive screw 58, and a translation internal thread tube 57. One end of the translation internal thread tube 57 is fixed to the feeding hopper 54, and the other end is threadedly connected to the translation drive screw 58. The translation drive motor 59 is used to drive the translation drive screw 58 to rotate. The translation drive unit can drive the feeding hopper 54 to switch back and forth between the feeding side of the crucible 52 and the discharge port of the screw conveyor unit.

[0042] Furthermore, the quantitative conveying mechanism includes a raw material box 62 and a screw conveying unit; the discharge port of the screw conveying unit is connected to the translation pipe 60 for conveying raw materials to the push hopper 54; the inlet of the screw conveying unit is connected to the bottom of the raw material box 62.

[0043] Furthermore, the spiral conveying unit includes a conveying drive motor 61, a conveying pipe 63, and a conveying auger 64. One end of the conveying pipe 63 is connected to the translational pipe 60, and the other end of the conveying pipe 63 is connected to the conical bottom of the raw material box 62. The conveying auger 64 is rotatably installed inside the conveying pipe 63, and the conveying drive motor 61 drives the conveying auger 64 to rotate. The cooperation between the conveying pipe 63 and the conveying auger 64 enables quantitative conveying of raw materials. This quantitative conveying does not require extremely precise measurement, as each crystal ball 22 produced has slight size variations and will ultimately be sliced.

[0044] Furthermore, the telescopic mechanism includes a discharge channel 33, a telescopic drive unit, and a U-shaped frame 36. The discharge channel 33 is connected and installed on the upper side of the crystal growth furnace. The upper and lower side frames of the U-shaped frame 36 are slidably installed on the upper and lower inner walls of the discharge channel 33, respectively. The telescopic drive unit is used to drive the U-shaped frame 36 to slide along the discharge channel 33. The clamping mechanism and the cutting mechanism are both installed on the U-shaped frame 36. A material picking window 49 is provided on the lower side of the discharge channel 33, and a window cover 50 is detachably installed at the material picking window 49, so that the cut crystal ball 22 can be taken out without opening the furnace door 2.

[0045] Furthermore, the telescopic drive unit includes a telescopic drive motor 34 and a telescopic drive screw 35; the telescopic drive screw 35 is rotatably installed in the unloading channel 33 and threadedly screwed onto the U-shaped frame 36; the telescopic drive motor 34 drives the telescopic drive screw 35 to rotate; a channel groove 51 is provided on both the upper and lower inner walls of the unloading channel 33, and the upper and lower side frames of the U-shaped frame 36 are slidably installed in the corresponding channel grooves 51. The channel grooves 51 effectively enhance the stability of the sliding of the U-shaped frame 36.

[0046] Furthermore, the clamping mechanism includes an opening and closing drive unit and two clamping covers 43; the top corners of the clamping edges on the upper and lower sides of the two clamping covers 43 are rotatably mounted on the upper and lower side frames of the U-shaped frame 36, respectively; the opening and closing drive unit is mounted on the lower side frame of the U-shaped frame 36 and is used to push and pull the two clamping covers 43 to open and close synchronously; a clamping positioning slot 65 for clamping the lower end of the seed crystal rod 21 is provided in the middle of the clamping edge on the upper side of each of the two clamping covers 43. The lower end of the seed crystal rod 21 is clamped and limited by the two clamping positioning slots 65, thereby ensuring stability during cutting; the lower end of the seed crystal rod 21 is wrapped by the two clamping covers 43, so that it is cut in an internal cavity during cutting, reducing the flying of cutting dust.

[0047] Furthermore, the opening and closing drive unit includes an opening and closing drive motor 47, an opening and closing drive screw 46, a drive longitudinal beam 45, a sliding rail 48, and two connecting rods 44. The sliding rail 48 is horizontally fixedly installed on the upper side of the lower side frame of the U-shaped frame 36. The middle part of the drive longitudinal beam 45 is slidably installed on the sliding rail 48, and the drive longitudinal beam 45 is perpendicular to the sliding rail 48. The opening and closing drive screw 46 is horizontally threaded and screwed onto the middle part of the drive longitudinal beam 45. The opening and closing drive motor 47 is used to drive the opening and closing drive screw 46 to rotate. One end of each of the two connecting rods 44 is pivotally hinged to both ends of the drive longitudinal beam 45, and the other end is pivotally hinged to the two clamping covers 43, thereby synchronously pushing and pulling the two clamping covers 43 to achieve the opening and closing motion of clamping. The sliding rail 48 can enhance the stability of the sliding of the drive longitudinal beam 45.

[0048] Furthermore, the cutting mechanism includes a feed drive unit, a cutting drive unit, and a rotary cutting blade 42; a feed window 19 is provided on each of the two clamping covers 43 opposite to the cutting mechanism; the rotary cutting blade 42 is rotatably mounted on the end of the feed drive unit, and the feed drive unit pushes the rotary cutting blade 42 through the feed window 19 to cut; the cutting drive unit is used to drive the rotary cutting blade 42 to rotate.

[0049] Furthermore, the feed drive unit includes a feed drive motor 38, a feed drive sleeve 37, a feed drive screw, and a feed cantilever tube 39. The feed drive sleeve 37 is horizontally fixedly installed on the lower side of the upper frame of the U-shaped frame 36, and the feed drive screw is rotatably installed inside the feed drive sleeve 37. One end of the feed cantilever tube 39 is inserted into the feed drive sleeve 37, and the feed drive screw is threadedly engaged with the threaded drive hole at the insertion end of the feed cantilever tube 39. The feed drive motor 38 is used to drive the feed drive screw to rotate, thereby driving the feed cantilever tube 39 to achieve telescopic feed movement. A feed guide groove is provided on the outer wall of the feed cantilever tube 39, and a feed guide slider is provided on the inner wall of the tube opening of the feed drive sleeve 37, which is slidably embedded in the feed guide groove.

[0050] Furthermore, the cutting drive unit includes a cutting drive motor 40 and a pulley drive mechanism; a blade slot 41 is provided on the cantilever end of the feed cantilever tube 39, and the rotary cutting blade 42 is rotatably mounted at the blade slot 41 via the blade spindle; the cutting drive motor 40 drives the blade spindle to rotate via the pulley drive mechanism, thereby realizing the rotary drive of the rotary cutting blade 42.

[0051] Furthermore, to achieve automated control during system operation, an electrical control cabinet 3 is also provided. The electrical control cabinet 3 includes a cabinet body, a controller, a display screen, and a button panel. The controller is located inside the cabinet, and the cabinet also houses pump drive circuits, lifting drive circuits, rotation drive circuits, hoisting drive circuits, translation drive circuits, conveying drive circuits, telescopic drive circuits, opening and closing drive circuits, feed drive circuits, and cutting drive circuits that are electrically connected to the controller. These circuits are used to drive and control the vacuum pump 4, lifting drive motor 15, rotation drive motor 8, hoisting drive motor 23, translation drive motor 59, conveying drive motor 61, telescopic drive motor 34, opening and closing drive motor 47, feed drive motor 38, and cutting drive motor 40, respectively. The controller drives and controls the heating coil 6 for heating control by sending frequency control signals to the high-frequency heating circuit. A temperature sensor for measuring the temperature of the crucible 52 and a pressure sensor for measuring the gas pressure inside the furnace are installed inside the furnace body 1 to provide feedback control for the heating coil 6 and the vacuum pump 4.

[0052] The crystal growth method of the crystal growth system provided by the present invention includes the following steps:

[0053] Step 1, System preparation: Install the seed crystal rod 21 on the rotating mechanism of the crystal growth furnace, and then drive the seed crystal rod 21 down by the lifting mechanism of the crystal growth furnace so that the lower end of the seed crystal rod 21 extends into the heating zone of the crucible heating mechanism of the crystal growth furnace. Then, load the raw material into the raw material box 62 of the quantitative conveying mechanism, seal the crystal growth furnace, and use the vacuum pump 4 of the crystal growth furnace to evacuate the crystal growth furnace.

[0054] Step 2, Raw material loading: The lifting drive unit of the lifting crucible mechanism drives the crucible 52 to descend to the loading side, and the quantitative conveying mechanism quantitatively conveys the raw material into the pushing hopper 54 of the translation pushing mechanism. Then, the translation pushing mechanism moves the pushing hopper 54 to above the loading side of the crucible 52, so that the raw material in the pushing hopper 54 falls into the crucible 52. Then, the lifting drive unit drives the crucible 52 to rise into the heating zone of the crucible heating mechanism, and the lower end of the seed crystal rod 21 extends into the crucible 52.

[0055] Step 3, Crystal growth: The crucible 52 is heated at high frequency by the crucible heating mechanism of the crystal growth furnace, so that the raw material in the crucible 52 melts. The lifting mechanism and the rotating mechanism of the crystal growth furnace work together to continuously rotate and lift the seed crystal rod 21 to achieve the growth of crystal ball 22.

[0056] Step 4, Cutting and Unloading: The lifting mechanism of the crystal growth furnace drives the crystal ball 22 to move upward away from the heating zone of the crucible heating mechanism to a set height; then the telescopic mechanism pushes the clamping mechanism into the crystal growth furnace, and the clamping mechanism clamps the lower end of the seed crystal rod 21 in a wrapping manner, so that the crystal ball 22 is located in the two clamping covers 43 of the clamping mechanism; then the feed drive unit of the cutting mechanism pushes the rotating cutting blade 42 into the two clamping covers 43, and the feed drive unit and the cutting drive unit of the cutting mechanism cooperate to drive the rotating cutting blade 42 to cut the lower end of the seed crystal rod 21, so that the crystal ball 22 falls into the two clamping covers 43; then the telescopic mechanism pulls the clamping mechanism into the unloading channel 33 of the telescopic mechanism, and then the clamping mechanism drives the two clamping covers 43 to open, so that the crystal ball 22 falls into the unloading window 49 on the lower side of the unloading channel 33, and the window cover 50 is opened to remove the crystal ball 22;

[0057] Step 5, System Check: Check if the length of the seed crystal rod 21 meets the requirements for the next growth. If it does, continue to use it. If it does not, replace it. Generally, the seed crystal rod 21 is replaced about once every 10 furnaces. Check if there is enough raw material in the raw material box 62 of the quantitative conveying mechanism. If not, replenish the raw material. After the check is completed, return to Step 2.

[0058] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A crystal growth system, characterized in that: The system includes a crystal growth furnace, a cutting and unloading device, and a raw material feeding device. The cutting and unloading device includes a telescopic mechanism, a clamping mechanism, and a cutting mechanism. The raw material feeding device includes a lifting crucible mechanism, a translational pushing mechanism, and a quantitative conveying mechanism. The telescopic mechanism is installed on the upper side of the crystal growth furnace. The clamping mechanism and the cutting mechanism are both installed on the telescopic mechanism. The telescopic mechanism drives the clamping mechanism and the cutting mechanism to enter and exit the crystal growth furnace. The clamping mechanism clamps the lower end of the seed crystal rod (21) in the crystal growth furnace. The cutting mechanism cuts the lower end of the seed crystal rod (21). The lifting crucible mechanism is installed on the bottom of the crystal growth furnace. The translational pushing mechanism is installed on the lower side of the crystal growth furnace. The quantitative conveying mechanism is installed on the translational pushing mechanism. The quantitative conveying mechanism feeds the raw material to the translational pushing mechanism. The translational pushing mechanism pushes the raw material into the lifting crucible mechanism. The lifting crucible mechanism rises and drives the raw material into the heating zone of the crystal growth furnace for heating and melting. The translation and pushing mechanism includes a translation pipe (60), a translation drive unit, and a pushing hopper (54); the translation pipe (60) is installed through the lower part of the crystal growth furnace, and the pushing hopper (54) is slidably installed inside the translation pipe (60); the translation drive unit is used to translate the pushing hopper (54) out of the translation pipe (60) to the upper part of the loading side of the lifting crucible mechanism; The quantitative conveying mechanism includes a raw material box (62) and a screw conveying unit; the outlet of the screw conveying unit is connected to the translation pipe (60) for conveying raw materials to the push hopper (54); the inlet of the screw conveying unit is connected to the bottom of the raw material box (62); The telescopic mechanism includes a discharge channel (33), a telescopic drive unit, and a U-shaped frame (36). The discharge channel (33) is installed on the upper side of the crystal growth furnace. The upper and lower side frames of the U-shaped frame (36) are slidably installed on the upper and lower inner walls of the discharge channel (33). The telescopic drive unit is used to drive the U-shaped frame (36) to slide along the discharge channel (33). The clamping mechanism and the cutting mechanism are both installed on the U-shaped frame (36). A material picking window (49) is provided on the lower side of the discharge channel (33), and a window cover (50) is detachably installed at the material picking window (49). The clamping mechanism includes an opening and closing drive unit and two clamping covers (43); the top corners of the clamping edges on the upper and lower sides of the two clamping covers (43) are respectively rotatably mounted on the upper and lower side frames of the U-shaped frame (36); the opening and closing drive unit is mounted on the lower side frame of the U-shaped frame (36) and is used to push and pull the two clamping covers (43) to open and close synchronously; a clamping positioning slot (65) for clamping the lower end of the seed crystal rod (21) is provided in the middle of the clamping edge on the upper side of the two clamping covers (43). The cutting mechanism includes a feed drive unit, a cutting drive unit, and a rotary cutting blade (42); a feed window (19) is provided on each of the two clamping covers (43) opposite to the cutting mechanism; the rotary cutting blade (42) is rotatably mounted on the end of the feed drive unit, and the feed drive unit pushes the rotary cutting blade (42) through the feed window (19) to cut; the cutting drive unit is used to drive the rotary cutting blade (42) to rotate.

2. The crystal growth system according to claim 1, characterized in that: The crystal growth furnace includes a furnace body (1), a furnace door (2), a vacuum pump (4), a crucible heating mechanism, a lifting mechanism, and a rotating mechanism; the furnace door (2) is hinged to the front furnace opening of the furnace body (1) to seal the front furnace opening; the vacuum pump (4) is connected to the furnace body (1) to evacuate the furnace body (1); the crucible heating mechanism is installed inside the furnace body (1) to heat the lifting crucible mechanism; the lifting mechanism is installed through the top of the furnace body (1), the rotating mechanism is installed on the lifting mechanism, and the upper end of the seed crystal rod (21) is detachably installed on the rotating mechanism. The rotating mechanism drives the seed crystal rod (21) to rotate, and the lifting mechanism raises the height of the rotating mechanism.

3. The crystal growth system according to claim 2, characterized in that: The lifting mechanism includes a lifting bracket, a lifting drive motor (15), a lifting drive tube (12), and a lifting drive seat (16); the rotating mechanism includes a rotating drive rod (9) and a rotating drive motor (8); the lifting drive seat (16) is rotatably mounted on the lifting bracket, the upper end of the lifting drive tube (12) is vertically slidably mounted on the lifting bracket, and the lower end of the lifting drive tube (12) penetrates the top of the crystal growth furnace; the lifting drive tube (12) is threadedly mounted on the lifting drive seat (16), and the lifting drive motor (15) drives the lifting drive seat (16) to rotate through a worm gear; the rotating drive rod (9) is rotatably mounted on the lifting drive tube (12), and the rotating drive motor (8) is used to drive the rotating drive rod (9) to rotate; the upper end of the seed crystal rod (21) is detachably mounted on the lower end of the rotating drive rod (9).

4. The crystal growth system according to claim 1, characterized in that: The lifting crucible mechanism includes a lifting drive unit and a crucible (52); the crucible (52) is mounted on the lifting drive unit and is located inside the crystal growth furnace. The lifting drive unit is installed through the bottom of the crystal growth furnace and the height position of the crucible (52) is adjusted by the lifting drive unit.

5. The growth method of the crystal growth system according to claim 1, characterized in that, Includes the following steps: Step 1, System preparation: Install the seed crystal rod (21) on the rotating mechanism of the crystal growth furnace, and then drive the seed crystal rod (21) down by the lifting mechanism of the crystal growth furnace so that the lower end of the seed crystal rod (21) extends into the heating zone of the crucible heating mechanism of the crystal growth furnace. Then load the raw material into the raw material box (62) of the quantitative conveying mechanism, seal the crystal growth furnace, and use the vacuum pump (4) of the crystal growth furnace to evacuate the crystal growth furnace. Step 2, raw material loading: The lifting drive unit of the lifting crucible mechanism drives the crucible (52) to descend to the loading side, and the quantitative conveying mechanism conveys the raw material quantitatively to the pushing hopper (54) of the translation pushing mechanism. Then, the translation pushing mechanism moves the pushing hopper (54) to the upper part of the loading side of the crucible (52), so that the raw material in the pushing hopper (54) falls into the crucible (52). Then, the lifting drive unit drives the crucible (52) to rise to the heating zone of the crucible heating mechanism, and the lower end of the seed crystal rod (21) extends into the crucible (52). Step 3, crystal growth: The crucible (52) is heated at high frequency by the crucible heating mechanism of the crystal growth furnace, so that the raw material in the crucible (52) melts. The lifting mechanism and the rotating mechanism of the crystal growth furnace work together to continuously rotate and lift the seed crystal rod (21) to achieve the growth of crystal ball (22). Step 4, Cutting and Unloading: The crystal ball (22) is moved upward from the heating zone of the crucible heating mechanism to a set height by the lifting mechanism of the crystal growth furnace; then the telescopic mechanism pushes the clamping mechanism into the crystal growth furnace, and the clamping mechanism clamps the lower end of the seed crystal rod (21) in a wrapping manner, so that the crystal ball (22) is located in the two clamping covers (43) of the clamping mechanism; then the feed drive unit of the cutting mechanism pushes the rotating cutting blade (42) into the two clamping covers (43), and the cutting mechanism feeds the crystal ball (22) into the furnace. The drive unit and the cutting drive unit work together to drive the rotating cutting blade (42) to cut the lower end of the seed crystal rod (21), so that the crystal ball (22) falls into the two clamping covers (43); then the telescopic mechanism pulls the clamping mechanism into the unloading channel (33) of the telescopic mechanism, and then the clamping mechanism drives the two clamping covers (43) to open, so that the crystal ball (22) falls into the material picking window (49) on the lower side of the unloading channel (33), and the window cover (50) is opened to take out the crystal ball (22); Step 5, System check: Check whether the length of the seed crystal rod (21) meets the requirements for the next growth. If it does, continue to use it. If it does not, replace it. Check whether the raw material in the raw material box (62) of the quantitative conveying mechanism is sufficient. If it is insufficient, replenish the raw material. After the check is completed, return to step 2.

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