A quartz crucible preparation device and preparation method thereof

Abstract

The present invention belongs to the technical field of inorganic non-metallic material manufacturing, and in particular, relates to a quartz crucible preparation device and a preparation method thereof, including a base, and also including: a melting placement mechanism, an arc heating mechanism, a crucible wall thickness detection feedback mechanism, a temperature rise control mechanism, an exhaust temperature adjustment mechanism, an exhaust time control mechanism, and a temperature rise speed conversion mechanism. The present invention can automatically control the rotation speed of the mold during the heating process based on the wall thickness of the crucible to be processed, and can automatically control the heating speed of the entire arc heating work based on the wall thickness of the crucible, so that the greater the wall thickness of the crucible, the slower the heating speed, and can automatically control the required exhaust temperature based on the wall thickness of the crucible, so that the greater the wall thickness of the crucible, the higher the final exhaust temperature value, and can automatically control the exhaust time based on the wall thickness of the crucible.

Description

Technical Field

[0001] The invention belongs to the technical field of inorganic non-metallic material manufacturing, and in particular relates to a quartz crucible preparation device and a preparation method thereof. Background Art

[0002] The main component of quartz is silicon dioxide, which is a typical inorganic non-metallic compound. Inorganic non-metallic materials usually have the characteristics of high temperature resistance, corrosion resistance, high hardness, good insulation, etc. Quartz crucibles have these excellent properties, can work stably in high temperature environments, do not react with most chemical substances, and are often used in chemical experiments, high temperature smelting and chemical reactions in industrial production.

[0003] At present, quartz crucibles are mainly melted by high-temperature electric arc method. The heating method adopts high-temperature electric arc heating. Before the quartz crucible is melted, high-purity quartz sand is poured into the inner surface of the mold and formed by a molding device. Then, multiple graphite electrodes discharge each other to form a high-temperature arc to heat the quartz sand on the inner surface of the melting mold until it is melted. At this time, the mold rotates at a certain speed. Due to the effect of centrifugal force, the molten quartz sand in the mold is guaranteed not to fall. After cooling, it is taken out, and the production of a quartz crucible blank is completed. In the process of high-temperature arc melting, if the heating speed is too fast, the gas inside the crucible will be wrapped by the rapidly solidified quartz before it can escape, which will cause too many bubbles inside the crucible, which will have a greater impact on the quality of the final molding of the crucible. In addition, the thicker the wall of the crucible is, the longer the time required for heat conduction. If the heating speed is too fast, it will cause a large temperature difference between the inside and outside of the crucible. This will generate greater thermal stress and cause defects such as crucible cracking. At present, the heating rate during the melting process of quartz crucibles is usually adjusted based on production experience. However, the heating rate adjustment accuracy is not enough, which can easily cause multiple batches of quartz crucibles to be scrapped, resulting in higher production costs. Summary of the invention

[0004] The object of the present invention is to provide a quartz crucible preparation device and a preparation method thereof in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: a quartz crucible preparation device, including a base, and also including:

[0006] A melting and placing mechanism is fixedly mounted on the upper end of the base;

[0007] An arc heating mechanism is fixedly mounted on the upper end of the base and arranged on one side of the melting and placing mechanism;

[0008] A crucible wall thickness detection feedback mechanism is fixedly mounted on the upper end of the base and is used to quickly measure the wall thickness of the crucible to be melted;

[0009] A temperature rise control mechanism, fixedly mounted on the upper end of the base, for controlling the heating temperature of the arc heating mechanism;

[0010] An exhaust temperature regulating mechanism, arranged at the upper end of the temperature rising control mechanism, for regulating the final exhaust temperature of the crucible;

[0011] An exhaust time control mechanism is fixedly mounted on the upper end of the temperature rise control mechanism and is used to adjust the time of the crucible temperature rise and exhaust work;

[0012] The temperature rise speed conversion mechanism is fixedly mounted on the upper end of the temperature rise control mechanism and is transmission-connected with the exhaust time control mechanism.

[0013] In the above-mentioned quartz crucible preparation device, the melting and placing mechanism includes a support shaft rotatably connected to the upper end of the base, the upper end of the support shaft is fixedly connected to a melting seat, a melting mold is installed in the melting seat, and a motor rotating assembly for driving the support shaft to rotate is fixedly installed on the upper end of the base.

[0014] In the above-mentioned quartz crucible preparation device, the arc heating mechanism includes a fixed frame fixedly mounted on the upper end of the base, the inner wall of the fixed frame is rotatably connected with a vertically arranged rotating screw, the upper end of the fixed frame is fixedly mounted with a driving motor for driving the rotating screw to rotate, the rod wall of the rotating screw is threadedly sleeved with a lifting seat, one end of the lifting seat is fixedly connected with a mounting frame, and a plurality of graphite electrodes distributed in a ring are fixedly mounted on the mounting frame.

[0015] In the above-mentioned quartz crucible preparation device, the crucible wall thickness detection feedback mechanism includes an L-shaped vertical plate fixedly mounted on the upper end of the base, the inner side of the L-shaped vertical plate is rotatably connected to an electric push rod, the upper end of the base is fixedly mounted with a motor drive assembly for driving the electric push rod to rotate, the upper movable end of the electric push rod is fixedly connected to a feedback shell, a plurality of sockets are provided on the side of the feedback shell close to the melting seat, and push-pull rods are movablely sleeved in the corresponding sockets, one end of the plurality of push-pull rods passes through and extends out of the feedback shell, and is fixedly connected to the same detection rod, one end of the plurality of push-pull rods located in the feedback shell is fixedly connected to the same moving block, and the moving block and the feedback shell are fixedly connected to the opposite side. A push-back spring is sleeved on the outside of the push-pull rod, the side of the moving block away from the push-pull rod is fixedly connected to a thrust permanent magnet plate, the inner wall of the feedback shell is fixedly provided with a thrust electromagnetic plate arranged opposite to the thrust permanent magnet plate, the lower end of the moving block is fixedly provided with a micro electric push rod, the lower end output end of the micro electric push rod is fixedly connected with an anti-slip limit plate, the upper end of the feedback shell is also fixedly provided with an insulating shell, the inner wall of the insulating shell is fixedly provided with a wall thickness feedback resistor rod, the upper end of the moving block is fixedly connected with an insulating block, the upper end of the insulating block extends into the insulating shell through a strip opening opened at the upper end of the feedback shell, and the upper end of the insulating block is fixedly connected with a wall thickness feedback conductive contact electrically in contact with the wall thickness feedback resistor rod.

[0016] In the above-mentioned quartz crucible preparation device, the temperature rising control mechanism includes a control shell fixedly mounted on the upper end of the base, an adjusting screw is rotatably connected inside the control shell, an adjusting motor for driving the adjusting screw to rotate is fixedly mounted on the outer wall of the control shell, an adjusting block is threadedly sleeved on the rod wall of the adjusting screw, a temperature adjusting resistor rod is fixedly mounted on the lower side of the inner wall of the control shell, and a temperature adjusting conductive contact piece electrically in contact with the temperature adjusting resistor rod is fixedly connected to the lower end of the adjusting block.

[0017] In the above-mentioned quartz crucible preparation device, the exhaust temperature adjustment mechanism includes an adjustment shell fixedly mounted on the front side of the upper end of the control shell, the upper end of the control shell is provided with a strip-shaped opening extending through the adjustment shell, and the inner wall corresponding to the strip-shaped opening is fixedly connected to a plurality of guide slide rods arranged side by side, and the plurality of guide slide rods are externally slidably sleeved with the same adjustment plate, the side wall of the adjustment plate and the inner wall of the corresponding strip-shaped opening of the control shell are fixedly connected with a plurality of compensation springs sleeved outside the guide slide rods, the lower end of the adjustment plate is fixedly connected with an in-place confirmation switch, the upper end of the adjustment block is fixedly connected with a pressing round head arranged corresponding to the position of the in-place confirmation switch, the upper end side wall of the adjustment plate is fixedly connected with an adjustment permanent magnet plate, and the inner wall of the adjustment shell is fixedly provided with an adjustment electromagnetic plate arranged opposite to the adjustment permanent magnet plate.

[0018] In the above-mentioned quartz crucible preparation device, the exhaust time control mechanism includes a trigger round shell fixedly mounted on the upper end of the control shell, a rotating shaft is rotatably connected to the center of the inner wall of the trigger round shell, a servo motor for driving the rotating shaft to rotate is fixedly mounted on the upper end of the trigger round shell, a trigger switch is fixedly mounted on one side of the upper end of the inner wall of the trigger round shell, an extension rod is fixedly connected to the outside of the rotating shaft, and an arc-shaped pressing block arranged opposite to the trigger switch is fixedly mounted on the upper side of one end of the extension rod.

[0019] In the above-mentioned quartz crucible preparation device, the heating speed conversion mechanism includes a conversion shell fixedly mounted on the upper end of the control shell, one side of the inner wall of the conversion shell is rotatably connected with a vertically arranged transmission screw, the rod wall of the transmission screw is threadedly sleeved with an extrusion plate, and a high-power starting switch and a low-power starting switch are fixedly mounted on the upper and lower ends of the inner wall of the control shell respectively, and the transmission screw and the lower end of the rotating shaft are transmission-connected via a pulley assembly.

[0020] A method for preparing a quartz crucible preparation device comprises the following steps:

[0021] S1. Crucible wall thickness detection feedback mechanism detects the thickness of the crucible wall to be heated and prepared;

[0022] S2. Melting and placing mechanism and arc heating mechanism to heat the crucible embryo body;

[0023] S3. The temperature rise control mechanism automatically controls the temperature rise rate of the entire arc heating operation;

[0024] S4. The exhaust temperature regulating mechanism regulates the exhaust temperature required by the crucible;

[0025] S5. The exhaust time control mechanism automatically regulates the duration of the crucible exhaust operation;

[0026] S6. The heating rate conversion mechanism realizes the process of heating the crucible. In the initial stage, the temperature is slowly increased to give the gas in the crucible enough time to escape, and then the temperature rise rate is increased to the required process temperature.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Through the provided melting and placing mechanism, arc heating mechanism and crucible wall thickness detection and feedback mechanism, the quartz crucible can be prepared by rapid high-temperature arc heating, and the rotation speed of the mold during the heating process can be automatically adjusted based on the wall thickness of the crucible to be processed. A slower rotation speed is used for crucibles with thicker walls, because the increase in the crucible wall thickness means that it takes longer for heat to transfer from the outer surface of the crucible to the inner core. The slower rotation speed allows each part of the crucible to stay in the heating area longer, so that it has enough time to absorb heat, thereby ensuring uniform heating and good forming of the crucible.

[0029] 2. By setting up the crucible wall thickness detection feedback mechanism and temperature rise control mechanism, the heating speed of the entire arc heating work can be automatically adjusted based on the wall thickness of the crucible, so that the thicker the wall of the crucible, the slower the heating speed, because the thicker the wall, the longer the time required for heat conduction. Too fast a heating speed will cause a large temperature difference between the inside and outside of the crucible, thereby generating a large thermal stress, which will cause the crucible to crack, thereby effectively improving the molding quality of the crucible and reducing the scrap rate.

[0030] 3. Through the crucible wall thickness detection feedback mechanism and exhaust temperature adjustment mechanism, the required exhaust temperature can be automatically adjusted based on the crucible wall thickness, so that the thicker the crucible wall is, the higher the final exhaust temperature value is. This is because the increase in wall thickness will cause the heat conduction path to become longer, and the speed at which heat is transferred from the crucible surface to the inside will become slower. Higher temperatures can provide more powerful thermal power, ensuring that heat can penetrate into the interior of the crucible, causing the internal gas to expand and be discharged due to heat, thereby better ensuring the molding quality of the crucible.

[0031] 4. Through the crucible wall thickness detection feedback mechanism, exhaust time control mechanism, and heating rate conversion mechanism, the exhaust time can be automatically adjusted based on the wall thickness of the crucible, so that the greater the wall thickness, the longer the exhaust time. This is because the thicker the wall thickness of the crucible, the longer the gas exhaust path, and the longer the time required to exhaust the gas. Increasing the exhaust time can ensure that the gas in the crucible is fully exhausted, and in the initial exhaust process, the temperature rise rate is slower to give the gas enough time to escape. After the gas is completely discharged, the subsequent temperature rise rate is increased until the required process temperature is reached. While ensuring the preparation efficiency, the exhaust effect of the gas in the crucible is guaranteed to avoid the problem of too many bubbles inside the crucible affecting the molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a quartz crucible preparation device provided by the present invention;

[0033] Figure 2 It is a cross-sectional structural schematic diagram of a melting and placing mechanism of a quartz crucible preparation device provided by the present invention;

[0034] Figure 3 It is a cross-sectional structural schematic diagram of an arc heating mechanism of a quartz crucible preparation device provided by the present invention;

[0035] Figure 4 It is a schematic cross-sectional structural diagram of a crucible wall thickness detection feedback mechanism of a quartz crucible preparation device provided by the present invention;

[0036] Figure 5 It is a cross-sectional structural schematic diagram of a temperature rising control mechanism of a quartz crucible preparation device provided by the present invention;

[0037] Figure 6 It is a cross-sectional structural schematic diagram of an exhaust temperature regulating mechanism of a quartz crucible preparation device provided by the present invention;

[0038] Figure 7 It is a cross-sectional structural schematic diagram of an exhaust time control mechanism of a quartz crucible preparation device provided by the present invention;

[0039] Figure 8 The present invention provides a schematic cross-sectional structural diagram of a heating rate conversion mechanism of a quartz crucible preparation device.

[0040] In the figure: 1 base, 2 melting placement mechanism, 21 support shaft, 22 melting seat, 23 melting mold, 24 motor rotating assembly, 3 arc heating mechanism, 31 fixed frame, 32 rotating screw, 33 driving motor, 34 lifting seat, 35 mounting frame, 36 graphite electrode, 4 crucible wall thickness detection feedback mechanism, 41 L-shaped vertical plate, 42 electric push rod, 43 motor drive assembly, 44 feedback shell, 45 push-pull rod, 46 detection rod, 47 moving block, 48 push-back spring, 49 thrust permanent magnet plate, 410 thrust electromagnetic plate, 411 micro electric push rod, 412 anti-slip limit plate, 413 insulating shell, 414 wall thickness feedback resistor rod, 415 insulating block, 416 wall thickness feedback conductive contact, 5 temperature control Control mechanism, 51 control shell, 52 adjusting screw, 53 adjusting motor, 54 adjusting block, 55 temperature adjusting resistor rod, 56 temperature adjusting conductive contact, 6 exhaust temperature adjustment mechanism, 61 adjusting shell, 62 strip port, 63 guide slide bar, 64 adjusting plate, 65 compensation spring, 66 in-place confirmation switch, 67 pressing round head, 68 adjusting permanent magnet plate, 69 adjusting electromagnetic plate, 7 exhaust time control mechanism, 71 trigger round shell, 72 rotating shaft, 73 servo motor, 74 trigger switch, 75 extension rod, 76 arc pressing block, 8 heating speed conversion mechanism, 81 conversion shell, 82 transmission screw, 83 extrusion plate, 84 high-power starting switch, 85 low-power starting switch, 86 pulley assembly. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] like Figure 1-Figure 8 As shown, a quartz crucible preparation device includes a base 1 and also includes:

[0043] The melting and placing mechanism 2 is fixedly mounted on the upper end of the base 1. The melting and placing mechanism 2 includes a support shaft 21 rotatably connected to the upper end of the base 1. The upper end of the support shaft 21 is fixedly connected with a melting seat 22. A melting mold 23 is mounted in the melting seat 22. A motor rotating assembly 24 for driving the support shaft 21 to rotate is fixedly mounted on the upper end of the base 1, so that the crucible embryo can be quickly formed and a stable supporting position is provided.

[0044] The arc heating mechanism 3 is fixedly mounted on the upper end of the base 1 and is arranged on one side of the melting and placing mechanism 2. The arc heating mechanism 3 includes a fixed frame 31 fixedly mounted on the upper end of the base 1. The inner wall of the fixed frame 31 is rotatably connected with a vertically arranged rotating screw 32. A driving motor 33 for driving the rotating screw 32 to rotate is fixedly mounted on the upper end of the fixed frame 31. A lifting seat 34 is threadedly sleeved on the rod wall of the rotating screw 32. One end of the lifting seat 34 is fixedly connected with a mounting frame 35. A plurality of graphite electrodes 36 arranged in a ring shape are fixedly mounted on the mounting frame 35 to increase the high heat released by the arc for melting quartz.

[0045] The crucible wall thickness detection feedback mechanism 4 is fixedly mounted on the upper end of the base 1 and is used for quickly measuring the wall thickness of the crucible to be melted. The crucible wall thickness detection feedback mechanism 4 comprises an L-shaped vertical plate 41 fixedly mounted on the upper end of the base 1. An electric push rod 42 is rotatably connected to the inner side of the L-shaped vertical plate 41. A motor drive assembly 43 for driving the electric push rod 42 to rotate is fixedly mounted on the upper end of the base 1. A feedback shell 44 is fixedly connected to the upper movable end of the electric push rod 42. A plurality of sockets are provided on the side of the feedback shell 44 close to the melting seat 22, and push-pull rods 45 are movably sleeved in the corresponding sockets. One end of the plurality of push-pull rods 45 extends through the outside of the feedback shell 44 and is fixedly connected to the same detection rod 46. One end of the plurality of push-pull rods 45 located in the feedback shell 44 is fixedly connected to the same moving block 47. A plurality of push-pull springs 48 sleeved on the outside of the push-pull rods 45 are fixedly connected to the opposite side of the moving block 47 and the feedback shell 44. A thrust permanent magnet plate 49 is fixedly connected to the side away from the push-pull rod 45, a thrust electromagnetic plate 410 arranged opposite to the thrust permanent magnet plate 49 is fixedly installed on the inner wall of the feedback shell 44, a micro electric push rod 411 is fixedly installed on the lower end of the moving block 47, and an anti-slip limit plate 412 is fixedly connected to the lower output end of the micro electric push rod 411, an insulating shell 413 is also fixedly installed on the upper end of the feedback shell 44, a wall thickness feedback resistor rod 414 is fixedly installed on the inner wall of the insulating shell 413, an insulating block 415 is fixedly connected to the upper end of the moving block 47, the upper end of the insulating block 415 extends into the insulating shell 413 through a strip opening opened at the upper end of the feedback shell 44, and a wall thickness feedback conductive contact 416 in electrical contact with the wall thickness feedback resistor rod 414 is fixedly connected to the upper end of the insulating block 415, which can quickly detect the wall thickness of the crucible and automatically adjust the subsequent melting work based on the wall thickness, so that the melting work is more stable and efficient.

[0046] The temperature rise control mechanism 5 is fixedly mounted on the upper end of the base 1 and is used to control the heating temperature of the arc heating mechanism 3. The temperature rise control mechanism 5 includes a control shell 51 fixedly mounted on the upper end of the base 1. An adjusting screw 52 is rotatably connected inside the control shell 51. An adjusting motor 53 for driving the adjusting screw 52 to rotate is fixedly mounted on the outer wall of the control shell 51. An adjusting block 54 is threadedly sleeved on the rod wall of the adjusting screw 52. A temperature regulating resistor rod 55 is fixedly mounted on the lower side of the inner wall of the control shell 51. A temperature regulating conductive contact piece 56 in electrical contact with the temperature regulating resistor rod 55 is fixedly connected to the lower end of the regulating block 54, so that the melting temperature can be gradually increased and the temperature rise rate can be accurately regulated.

[0047] The exhaust temperature regulating mechanism 6 is arranged at the upper end of the temperature raising control mechanism 5, and is used to regulate the final exhaust temperature of the crucible. The exhaust temperature regulating mechanism 6 comprises an regulating shell 61 fixedly arranged at the front side of the upper end of the control shell 51. The upper end of the control shell 51 is provided with a strip-shaped opening 62 extending through the regulating shell 61, and the inner wall of the corresponding strip-shaped opening 62 is fixedly connected to a plurality of guide slide bars 63 arranged side by side. The plurality of guide slide bars 63 are slidably sleeved with the same regulating plate 64. The side wall of the regulating plate 64 is fixedly connected to the inner wall of the corresponding strip-shaped opening 62 of the control shell 51. It is connected to a plurality of compensation springs 65 which are sleeved outside the guide slide bar 63, the lower end of the adjustment plate 64 is fixedly connected to a position confirmation switch 66, the upper end of the adjustment block 54 is fixedly connected to a pressing round head 67 which is arranged corresponding to the position of the position confirmation switch 66, the upper end side wall of the adjustment plate 64 is fixedly connected to an adjustment permanent magnet plate 68, and the inner wall of the adjustment shell 61 is fixedly provided with an adjustment electromagnetic plate 69 which is arranged opposite to the adjustment permanent magnet plate 68, which can automatically adjust the required exhaust temperature based on the wall thickness of the crucible, so that the gas in the crucible can be better discharged and the residual bubbles can be reduced.

[0048] The exhaust time control mechanism 7 is fixedly mounted on the upper end of the temperature rise control mechanism 5, and is used for regulating the time of the crucible heating and exhaust work. The exhaust time control mechanism 7 comprises a trigger round shell 71 fixedly mounted on the upper end of the control shell 51, and a rotating shaft 72 is rotatably connected at the center of the inner wall of the trigger round shell 71, and a servo motor 73 for driving the rotating shaft 72 to rotate is fixedly mounted on the upper end of the trigger round shell 71, and a trigger switch 74 is fixedly mounted on one side of the upper end of the inner wall of the trigger round shell 71, and an extension rod 75 is fixedly connected to the outside of the rotating shaft 72, and an arc-shaped pressing block 76 arranged opposite to the trigger switch 74 is fixedly mounted on the upper side of one end of the extension rod 75.

[0049] The heating speed conversion mechanism 8 is fixedly mounted on the upper end of the heating control mechanism 5 and is connected to the exhaust time control mechanism 7 in transmission. The heating speed conversion mechanism 8 includes a conversion shell 81 fixedly mounted on the upper end of the control shell 51. A vertically arranged transmission screw 82 is rotatably connected to one side of the inner wall of the conversion shell 81. The rod wall of the transmission screw 82 is threadedly sleeved with an extrusion plate 83. A high-power starting switch 84 and a low-power starting switch 85 are fixedly mounted on the upper and lower ends of the inner wall of the control shell 51 respectively. The transmission screw 82 and the lower end of the rotating shaft 72 are connected in transmission through a pulley assembly 86, which can convert the temperature rise rate of exhaust and the temperature rise rate of subsequent melting, so as to achieve a slow temperature rise rate for the initial exhaust work and a fast temperature rise rate for subsequent melting, based on sufficient time for the gas in the crucible to be discharged.

[0050] A PLC controller (not shown in the figure) is also fixedly installed on the upper end of the base 1, and the PLC controller is electrically connected to the melting and placing mechanism 2, the arc heating mechanism 3, the crucible wall thickness detection feedback mechanism 4, the temperature rise control mechanism 5, the exhaust temperature adjustment mechanism 6, the exhaust time control mechanism 7 and the temperature rise speed conversion mechanism 8 respectively.

[0051] The operating principle of the present invention is now described as follows: quartz sand is added into the melting mold 23, and the crucible is formed in cooperation with the molding device. The PLC controller controls the electric push rod 42 to push the feedback shell 44 and the detection rod 46 upward, and the PLC controller then controls the motor drive assembly 43 to drive the electric push rod 42 to rotate, so that the detection rod 46 moves to one side of the melting mold 23. The PLC controller controls the power supply device to supply power to the thrust electromagnetic plate 410. The thrust electromagnetic plate 410 is energized to generate the same magnetism as the thrust permanent magnet plate 49, thereby generating a thrust on the moving block 47, so that the detection rod 46 moves away from the feedback shell 44. The PLC controller then controls the electric push rod 42 to drive the feedback shell 44 to move downward, so that the detection rod 46 extends into the inner side of the melting mold 23. At this time, the PLC controller controls the power supply device to cut off the power supply to the thrust electromagnetic plate 410, and under the action of the push-back spring 48, the moving block 47 cooperates with the push-pull rod 45 to drive the detection rod 46 to move backward. , until the detection rod 46 contacts the inner wall of the crucible, and during the movement of the moving block 47, the wall thickness feedback conductive contact 416 is synchronously driven to slide on the wall thickness feedback resistor rod 414. Specifically, the greater the wall thickness of the crucible, the shorter the sliding distance of the wall thickness feedback conductive contact 416 on the wall thickness feedback resistor rod 414, so that the access resistance of the wall thickness feedback resistor rod 414 is greater. After the thrust electromagnetic plate 410 is powered off for 3s, the PLC controller controls the micro electric push rod 411 to push the anti-slip limit plate 412 downward, so that the anti-slip limit plate 412 is stably in contact with the bottom of the inner wall of the feedback shell 44, so that the relative position of the wall thickness feedback conductive contact 416 on the wall thickness feedback resistor rod 414 is fixed, and the PLC controller controls the electric push rod 42 to push the feedback shell 44 and the detection rod 46 upward, and then the PLC controller controls the motor drive assembly 43 to drive the electric push rod 42 to rotate, so that the feedback shell 44 and the detection rod 46 move to the side;

[0052] The PLC controller controls the driving motor 33 to drive the rotating screw 32 to rotate. The screw 32 and the lifting seat 34 are connected by threads, so that the lifting seat 34 drives the graphite electrode 36 to move downward and extend into the melting mold 23. The PLC controller then controls the motor rotating assembly 24 to drive the support shaft 21 and the melting seat 22 to rotate. The PLC controller controls the power supply device to supply power to the graphite electrode 36. Multiple graphite electrodes 36 discharge each other to form a high-temperature arc to heat the quartz sand on the inner surface of the melting mold 23 to a melted state. At this time, the melting mold 23 rotates at a certain speed. Due to the effect of centrifugal force, the melting mold 23 is ensured. The molten quartz sand in the tool 23 does not fall, and during the heating process, the PLC controller controls the regulating motor 53 to drive the regulating screw 52 to rotate, and the regulating block 54 drives the temperature regulating conductive contact 56 to slide on the temperature regulating resistor rod 55 through the threaded sleeve effect of the regulating screw 52 and the regulating block 54, so that the access resistance of the temperature regulating resistor rod 55 gradually decreases, and the temperature regulating conductive contact 56 and the temperature regulating resistor rod 55 are connected in series to the power supply circuit of the graphite electrode 36, so that the current of the graphite electrode 36 gradually increases, so that the discharge heating power of the graphite electrode 36 gradually increases;

[0053] The wall thickness feedback conductive contact 416 and the wall thickness feedback resistor rod 414 are connected in series to the power supply circuit of the regulating motor 53. The regulating motor 53 is a DC motor. When the molding thickness of the crucible is greater, the access resistance of the wall thickness feedback resistor rod 414 is greater, and the power supply current of the regulating motor 53 is smaller, thereby making the speed of the regulating motor 53 slower, so that the temperature rise rate of the graphite electrode 36 discharged and heated is slower;

[0054] Moreover, the wall thickness feedback conductive contact piece 416 and the wall thickness feedback resistor rod 414 are also connected in series to the power supply circuit of the adjustment electromagnetic plate 69. When the molding thickness of the crucible is larger, the access resistance value of the wall thickness feedback resistor rod 414 is larger, and the power supply current of the adjustment electromagnetic plate 69 is relatively small, so that the magnetism of the adjustment electromagnetic plate 69 is relatively weak, and the adjustment electromagnetic plate 69 is energized to generate the same magnetism as the adjustment permanent magnet plate 68, thereby generating a smaller extrusion force on the adjustment plate 64, so that the adjustment plate 64 moves a smaller distance along the guide slide bar 63 to overcome the elastic force of the compensation spring 65, thereby making the in-place confirmation switch 66 in a relatively rearward position in the control shell 51, until the adjustment block 54 drives the pressing round head 67 to act on the in-place confirmation switch 66, indicating that the exhaust temperature of the crucible is reached, because the in-place confirmation switch 66 is in a relatively rearward position, so that the final exhaust temperature of the crucible will be relatively high, so that the greater the crucible wall thickness, the higher the final exhaust temperature;

[0055] When the in-place confirmation switch 66 is pressed and triggered, the PLC controller first controls the regulating motor 53 to stop working, so that the discharge heating temperature of the graphite electrode 36 is relatively maintained, and the PLC controller synchronously controls the servo motor 73 to move. The servo motor 73 drives the extension rod 75 and the arc-shaped pressing block 76 to move in the trigger round shell 71 through the rotating shaft 72, until the arc-shaped pressing block 76 acts on the trigger switch 74, indicating that the exhaust time is in place, and the wall thickness feedback conductive contact 416 and the wall thickness feedback resistor rod 414 are also connected in series to the power supply circuit of the servo motor 73. The servo motor 73 is a DC reduction motor. When the molding thickness of the crucible is greater, the access resistance value of the wall thickness feedback resistor rod 414 is greater, and the power supply current of the servo motor 73 is smaller, so that the rotation speed of the servo motor 73 is slower, and then the interval time of the arc-shaped pressing block 76 acting on the trigger switch 74 is longer, so that the greater the wall thickness of the crucible, the longer the heating exhaust time of the crucible;

[0056] After the trigger switch 74 is pressed and triggered, the PLC controller continues to control the action of the regulating motor 53, and the discharge heating temperature of the graphite electrode 36 continues to increase until the final heating working temperature is reached. While the servo motor 73 drives the rotating shaft 72 to rotate, the rotating shaft 72 drives the transmission screw 82 to rotate synchronously through the pulley assembly 86. The threaded sleeve action of the transmission screw 82 and the extrusion plate 83 makes the extrusion plate 83 relatively move upward in the conversion shell 81. It is additionally explained that the extrusion plate 83 initially acts on the low-power starting switch 85. The low-power starting switch 85 controls the regulating motor 53 to work at a lower speed, so that the initial exhaust and heating work of the crucible is carried out at a slower temperature rise rate, giving the gas in the crucible enough time to escape. After the exhaust work is completed, when the arc-shaped pressing block 76 acts on the trigger switch 74, the extrusion plate 83 also presses on the high-power starting switch 84, so that the regulating motor 53 continues to work at a higher speed, thereby increasing the subsequent temperature rise rate of heating the crucible.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A quartz crucible preparation device, comprising a base (1), characterized in that: Also includes: A melting and placing mechanism (2) is fixedly mounted on the upper end of the base (1); An arc heating mechanism (3) is fixedly mounted on the upper end of the base (1) and is arranged on one side of the melting and placing mechanism (2); A crucible wall thickness detection feedback mechanism (4) is fixedly mounted on the upper end of the base (1) and is used to quickly measure the wall thickness of the crucible to be melted; A temperature rise control mechanism (5) is fixedly mounted on the upper end of the base (1) and is used to control the heating temperature of the arc heating mechanism (3); An exhaust temperature regulating mechanism (6) is arranged at the upper end of the temperature rising control mechanism (5) and is used to regulate the final exhaust temperature of the crucible; An exhaust time control mechanism (7) is fixedly mounted on the upper end of the temperature increase control mechanism (5) and is used to control the time of the crucible temperature increase and exhaust work; The temperature rise speed conversion mechanism (8) is fixedly mounted on the upper end of the temperature rise control mechanism (5) and is transmission-connected to the exhaust time control mechanism (7).

2. A quartz crucible preparation device according to claim 1, characterized in that: The melting placement mechanism (2) comprises a support shaft (21) rotatably connected to the upper end of the base (1); a melting seat (22) is fixedly connected to the upper end of the support shaft (21); a melting mold (23) is arranged in the melting seat (22); and a motor rotating assembly (24) for driving the support shaft (21) to rotate is fixedly arranged at the upper end of the base (1).

3. A quartz crucible preparation device according to claim 1, characterized in that: The arc heating mechanism (3) comprises a fixed frame (31) fixedly mounted on the upper end of the base (1); the inner wall of the fixed frame (31) is rotatably connected to a vertically arranged rotating screw (32); a driving motor (33) for driving the rotating screw (32) to rotate is fixedly mounted on the upper end of the fixed frame (31); a lifting seat (34) is threadedly sleeved on the rod wall of the rotating screw (32); one end of the lifting seat (34) is fixedly connected to a mounting frame (35); and a plurality of graphite electrodes (36) arranged in an annular pattern are fixedly mounted on the mounting frame (35).

4. A quartz crucible preparation device according to claim 2, characterized in that: The crucible wall thickness detection feedback mechanism (4) comprises an L-shaped vertical plate (41) fixedly mounted on the upper end of the base (1), an electric push rod (42) being rotatably connected to the inner side of the L-shaped vertical plate (41), a motor drive assembly (43) for driving the electric push rod (42) to rotate is fixedly mounted on the upper end of the base (1), a feedback shell (44) is fixedly connected to the upper movable end of the electric push rod (42), and a side of the feedback shell (44) close to the melting seat (22) is opened. A plurality of sockets are provided, and push-pull rods (45) are movablely sleeved in the corresponding sockets. One end of the plurality of push-pull rods (45) extends through the feedback shell (44) and is fixedly connected to the same detection rod (46). One end of the plurality of push-pull rods (45) located in the feedback shell (44) is fixedly connected to the same moving block (47). The moving block (47) and the feedback shell (44) are fixedly connected to a plurality of push-back springs (48) sleeved outside the push-pull rods (45) on the opposite side thereof. A thrust permanent magnet plate (49) is fixedly connected to a side of the moving block (47) away from the push-pull rod (45); a thrust electromagnetic plate (410) arranged opposite to the thrust permanent magnet plate (49) is fixedly mounted on the inner wall of the feedback shell (44); a micro electric push rod (411) is fixedly mounted on the lower end of the moving block (47); an anti-slip limit plate (412) is fixedly connected to the lower output end of the micro electric push rod (411); and a thrust electromagnetic plate (410) is fixedly mounted on the upper end of the feedback shell (44). An insulating shell (413) is provided, a wall thickness feedback resistor rod (414) is fixedly mounted on the inner wall of the insulating shell (413), an insulating block (415) is fixedly connected to the upper end of the moving block (47), the upper end of the insulating block (415) extends into the insulating shell (413) through a strip-shaped opening opened at the upper end of the feedback shell (44), and a wall thickness feedback conductive contact piece (416) which is in electrical contact with the wall thickness feedback resistor rod (414) is fixedly connected to the upper end of the insulating block (415).

5. A quartz crucible preparation device according to claim 1, characterized in that: The temperature rise control mechanism (5) comprises a control shell (51) fixedly mounted on the upper end of the base (1), an adjusting screw (52) being rotatably connected inside the control shell (51), an adjusting motor (53) for driving the adjusting screw (52) to rotate being fixedly mounted on the outer wall of the control shell (51), an adjusting block (54) being threadedly sleeved on the rod wall of the adjusting screw (52), a temperature adjusting resistor rod (55) being fixedly mounted on the lower side of the inner wall of the control shell (51), and a temperature adjusting conductive contact piece (56) being in electrical contact with the temperature adjusting resistor rod (55) being fixedly connected at the lower end of the adjusting block (54).

6. A quartz crucible preparation device according to claim 5, characterized in that: The exhaust temperature regulating mechanism (6) comprises an regulating shell (61) fixedly mounted on the front side of the upper end of the control shell (51); the upper end of the control shell (51) is provided with a strip-shaped opening (62) extending through the regulating shell (61); and a plurality of guide slide bars (63) arranged in parallel are fixedly connected to the inner wall of the corresponding strip-shaped opening (62); the plurality of guide slide bars (63) are slidably sleeved with the same regulating plate (64) on the outside; and the side wall of the regulating plate (64) and the inner wall of the corresponding strip-shaped opening (62) of the control shell (51) are connected to each other. The wall is fixedly connected to a plurality of compensation springs (65) sleeved outside the guide slide bar (63); the lower end of the adjustment plate (64) is fixedly connected to an in-position confirmation switch (66); the upper end of the adjustment block (54) is fixedly connected to a pressing round head (67) arranged corresponding to the position of the in-position confirmation switch (66); the upper end side wall of the adjustment plate (64) is fixedly connected to an adjustment permanent magnet plate (68); and the inner wall of the adjustment shell (61) is fixedly provided with an adjustment electromagnetic plate (69) arranged opposite to the adjustment permanent magnet plate (68).

7. A quartz crucible preparation device according to claim 5, characterized in that: The exhaust time control mechanism (7) comprises a triggering round shell (71) fixedly mounted on the upper end of the control shell (51); a rotating shaft (72) is rotatably connected to the center of the inner wall of the triggering round shell (71); a servo motor (73) for driving the rotating shaft (72) to rotate is fixedly mounted on the upper end of the triggering round shell (71); a triggering switch (74) is fixedly mounted on one side of the upper end of the inner wall of the triggering round shell (71); an extension rod (75) is fixedly connected to the outside of the rotating shaft (72); and an arc-shaped pressing block (76) arranged opposite to the triggering switch (74) is fixedly mounted on the upper side of one end of the extension rod (75).

8. A quartz crucible preparation device according to claim 7, characterized in that: The heating speed conversion mechanism (8) comprises a conversion shell (81) fixedly mounted on the upper end of the control shell (51); a vertically arranged transmission screw (82) is rotatably connected to one side of the inner wall of the conversion shell (81); an extrusion plate (83) is threadedly sleeved on the rod wall of the transmission screw (82); a high-power starting switch (84) and a low-power starting switch (85) are respectively fixedly mounted on the upper and lower ends of the inner wall of the control shell (51); and the transmission screw (82) and the lower end of the rotating shaft (72) are transmission-connected via a pulley assembly (86).

9. A method for preparing a quartz crucible using the quartz crucible preparation device according to claim 1, characterized in that: The steps include: S1. Crucible wall thickness detection feedback mechanism (4) to be heated to prepare the crucible wall thickness detection; S2. The melting and placing mechanism (2) and the arc heating mechanism (3) heat the crucible embryo body for preparation; S3. The temperature rise control mechanism (5) automatically controls the temperature rise rate of the entire arc heating operation; S4. The exhaust temperature regulating mechanism (6) regulates the exhaust temperature required by the crucible; S5. Exhaust time control mechanism (7) automatically controls the duration of the crucible exhaust operation; S6. The heating rate conversion mechanism (8) realizes the process of heating the crucible, slowly heating it up in the initial stage to give the gas in the crucible enough time to escape, and then increases the temperature rise rate to the required process temperature.

Images