Quartz crucible forming device and method
By designing an adjustable quartz crucible molding device, the problem of single type of bottom quartz sand and high production cost is solved, and the molding and production cost of multiple layers of different types of quartz sand is achieved.
Patent Information
- Application Number
- CN202411797588.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-07
AI Technical Summary
In the existing quartz crucible production technology, the type of bottom quartz sand is single, resulting in an increase in production costs and the molding rod cannot be replaced, which limits the change in the ratio of bottom quartz sand.
A quartz crucible forming device is designed, including a fixing rod, a molding scraper, a guide slider, an adjustment screw and a central thimble. By adjusting screw, the gap between the molding scraper and the bottom of the mold can be adjusted, and the forming of multiple layers of different types of quartz sand is achieved.
It realizes the adjustment of the bottom molding thickness according to requirements during the molding process, and can form multiple layers of different types of quartz sand, enriching the formula for bottom sand and reducing production costs.
Smart Images
Figure CN119569315A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of quartz crucible production technology, and in particular to a quartz crucible forming device and method. Background Art
[0002] At present, the commonly used production methods of quartz crucibles are all high-temperature arc melting; before the quartz crucible is melted, the mold is tilted at a certain angle, and different types of quartz sand are poured into the straight wall of the mold in turn, and different forming rods are used to shape each layer of quartz sand, so as to obtain the thickness of each layer of quartz sand required by the process. After the straight wall quartz sand is formed, the mold is adjusted to the 0° position, and the bottom forming rod is used to position the straight wall quartz sand through the center hole to scrape the straight wall quartz sand to the bottom of the mold, and finally the bottom quartz sand is formed. However, in this way, during the bottom quartz sand forming process, the forming rod cannot be replaced, and the gap between the forming rod and the bottom of the mold is fixed, which will cause the bottom quartz sand to be single in type, and it is difficult to change the ratio of the bottom quartz sand; and the inner layer of sand at the bottom requires high-purity quartz sand. Since the forming rod cannot be replaced, only one type of bottom quartz sand can be used, that is, only high-purity quartz sand can be used, which will increase production costs. Summary of the invention
[0003] In view of this, the present invention provides a quartz crucible forming device and method to solve the technical problem of single type of quartz sand at the bottom and increased production cost.
[0004] The technical solution adopted by the present invention to solve its technical problem is: A quartz crucible forming device comprises: a fixed rod, a forming scraper, a guide slider, an adjusting screw, and a center ejector; the forming scraper is connected to the fixed rod through the guide slider, and the forming scraper can move up and down along the fixed rod to adjust the distance between the forming scraper and the bottom of the mold; the adjusting screw is connected to the guide slider through a threaded connection, and is used to fix, clamp or loosen the forming scraper for adjustment; the center ejector is installed at the end of the bottom of the fixed rod, and is used to be positioned with the center hole of the bottom of the mold.
[0005] Preferably, a threaded hole is provided on the forming scraper, and the guide slider is connected to the forming scraper via a bolt; the fixing rod passes through the guide slider and is connected to the forming scraper.
[0006] Preferably, a scale is provided on the upper portion of the fixing rod to facilitate adjustment of the distance between the forming scraper and the bottom of the mold.
[0007] Preferably, it also includes a guide screw; a guide hole is opened at the bottom of the forming scraper near the center ejector pin, and the guide screw passes through the guide hole and is connected to the fixing rod through a nut.
[0008] Preferably, the guide slider comprises a first guide slider and a second guide slider, and the first guide slider is installed on the straight arm of the forming scraper at a preset distance from the second guide slider.
[0009] The present invention also provides a quartz crucible forming method, using the quartz crucible forming device as described above, comprising the following steps: S1. Tilt the mold at a certain angle, pour different types of quartz sand into the mold wall in turn, and use different quartz crucible molding devices to mold each layer of quartz sand; S2. After the straight-wall quartz sand is formed, adjust the mold to the 0° position; S3. According to the required molding thickness of each layer of sand at the bottom, adjust the gap between the molding scraper and the bottom of the mold to the corresponding thickness, pour different quartz sands into the bottom of the mold in sequence, and use a quartz crucible molding device for molding.
[0010] Preferably, in step S1, the mold is tilted at a certain angle, different types of quartz sand are poured into the mold wall in sequence, and different quartz crucible molding devices are used to mold each layer of quartz sand, including the following steps: S11, opening and rotating the mold, adjusting the mold angle so that the angle between its axis and the vertical direction is 55-70°, pouring the outer layer of sand into the straight wall portion of the mold, and using the first molding device to mold the outer layer of sand; S12, after the outer layer of sand is formed, the middle layer of sand is poured into the straight wall portion of the mold, and the middle layer of sand is formed by a second forming device; S13, after the middle layer of sand is formed, the second forming device is replaced with a quartz crucible forming device, and the distance between the forming scraper of the quartz crucible forming device and the bottom of the mold is adjusted to H, and the adjusting screw is rotated to fix and clamp the forming scraper; S14. Pour the inner layer of sand into the straight wall of the mold, align the center pin with the center hole at the bottom of the mold for positioning, move the fixed rod by hand to a position parallel to the inner wall of the mold, and use the forming scraper to scrape the inner layer of sand flat.
[0011] Preferably, in step S2, after the straight-wall quartz sand is formed, adjusting the mold to the 0° position includes: after the straight-wall quartz sand is formed, taking out the quartz crucible forming device, and adjusting the mold angle so that the angle between its axis and the vertical direction is 0°.
[0012] Preferably, in step S3, the gap between the forming scraper and the bottom of the mold is adjusted to a corresponding thickness according to the required forming thickness of each layer of sand at the bottom, and different quartz sands are poured into the bottom of the mold in sequence, and the forming is performed using a quartz crucible forming device, which specifically includes the following steps: S31, turn the adjusting screw to loosen the forming scraper and the fixing rod, and adjust the distance between the forming scraper and the bottom of the mold to H1; S32, rotate the adjusting screw in the opposite direction to clamp the forming scraper and the fixing rod, and align the center pin with the center hole at the bottom of the mold for positioning; S33, pouring a first preset amount of outer layer sand into the bottom of the mold, holding the fixed rod and moving it to a position parallel to the inner wall of the mold, and using the forming scraper to scrape the outer layer sand at the bottom flat; S34, adjusting the distance between the forming scraper and the bottom of the mold to H2 by adjusting the screw, pouring a second preset amount of middle layer sand into the bottom of the mold, and using the forming scraper to scrape the bottom middle layer sand flat; S35, adjusting the distance between the forming scraper and the bottom of the mold to H3 by adjusting the screw, pouring a third preset amount of inner layer sand into the bottom of the mold, and using the forming scraper to scrape the bottom inner layer sand flat.
[0013] Preferably, H1 is 3-5 mm, H2 is 11-13 mm, and H3 is 23-25 mm.
[0014] Compared with the prior art, the present invention has the following beneficial effects: When the quartz crucible forming device of the present invention is used, the forming scraper is first loosened by rotating the adjusting screw, and then the forming scraper is pulled up and down according to the required thickness of each layer of sand at the bottom. When the distance between the forming scraper and the bottom of the mold reaches the required thickness, the adjusting screw is rotated in the opposite direction to fix and clamp the forming scraper, and finally the center top pin is aligned with the center hole at the bottom of the mold for positioning, and each layer of sand at the bottom is scraped flat by the forming scraper. In this way, the bottom forming thickness can be adjusted as required during the forming process, and multiple layers of different types of quartz sand can be formed at the bottom, enriching the sand formula for the bottom and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of the quartz crucible forming device of the present invention.
[0016] Figure 2 It is a schematic diagram of the scale of the fixing rod of the present invention.
[0017] Figure 3 The present invention is a diagram of a quartz crucible forming device in use.
[0018] Figure 4 For the general Figure 3 A is an enlarged schematic diagram.
[0019] Figure 5 This is another usage state diagram of the quartz crucible forming device of the present invention.
[0020] Figure 6 For the general Figure 5 Schematic diagram of the enlarged view at B.
[0021] In the figure: a fixing rod 1, a forming scraper 2, a guide slider 3, an adjusting screw 4, a guide screw 5, a center ejector pin 6, and a mold 7. DETAILED DESCRIPTION
[0022] The technical solutions and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.
[0023] Please see Figure 1 A quartz crucible forming device comprises: a fixed rod 1, a forming scraper 2, a guide slider 3, an adjusting screw 4, and a center ejector 6; the forming scraper 2 is connected to the fixed rod 1 through the guide slider 3, and the forming scraper 2 can move up and down along the fixed rod 1 to adjust the distance between the forming scraper 2 and the bottom of the mold 7; the adjusting screw 4 is connected to the guide slider 3 through a threaded connection, which is used to fix, clamp or loosen the forming scraper 2 for adjustment; the center ejector 6 is installed at the end of the bottom of the fixed rod 1, and is used to position with the center hole of the bottom of the mold.
[0024] When the quartz crucible forming device of the present invention is used, the forming scraper 2 is first loosened by rotating the adjusting screw 4, and then the forming scraper 2 is pulled up and down according to the required thickness of each layer of sand at the bottom. When the distance between the forming scraper 2 and the bottom of the mold 7 reaches the required thickness, the adjusting screw 4 is rotated in the opposite direction to fix and clamp the forming scraper 2, and finally the center top pin is aligned with the center hole at the bottom of the mold for positioning, and each layer of sand at the bottom is scraped flat by the forming scraper 2. In this way, the bottom forming thickness can be adjusted as required during the forming process, and multiple layers of different types of quartz sand can be formed at the bottom, enriching the sand formula for the bottom and reducing production costs.
[0025] Furthermore, a threaded hole is provided on the forming scraper 2, and the guide slider 3 is connected to the forming scraper 2 by bolts; the fixing rod 1 passes through the guide slider 3 and is connected to the forming scraper 2. After the guide slider 3 is connected to the forming scraper 2, a channel is formed between the guide slider and the forming scraper for the fixing rod to pass through, thereby guiding the moving direction of the forming scraper, that is, limiting the forming scraper to move up and down only along the fixing rod. At the same time, the adjusting screw 4 is threadedly connected to the guide slider. When it is necessary to fix and clamp the forming scraper 2, the adjusting screw 4 is rotated so that the bottom end of the adjusting screw is tightly pressed against the fixing rod, thereby clamping and fixing the forming scraper and the fixing rod.
[0026] In some embodiments, please refer again to Figure 1The guide slider 3 includes a first guide slider and a second guide slider, and the first guide slider and the second guide slider are installed on the straight arm of the forming scraper at a preset distance. Specifically, the forming scraper includes a straight arm, a bottom arm, and an arc arm connecting the straight arm and the bottom arm. The first guide slider is installed on the straight arm close to the top of the forming scraper, and the second guide slider is installed on the straight arm close to the arc arm of the forming scraper. The moving direction of the forming scraper is limited by the first guide slider and the second guide slider to prevent the forming scraper from moving left and right, thereby avoiding scraping the formed straight wall part when bottom forming is performed. In some embodiments, an adjusting screw is provided on the first guide slider, and the second guide slider may not be provided with an adjusting screw, which only plays a guiding role.
[0027] For further information, see Figure 2 The upper part of the fixed rod 1 is provided with a scale to facilitate the adjustment of the distance between the forming scraper and the bottom of the mold. The scale on the fixed rod is determined according to the customer's demand for the thickness of the sand at the bottom of the quartz crucible. Generally, the thickness of the sand at the bottom of the quartz crucible is between 22-28mm. Therefore, if Figure 2 As shown, the scale on the fixed rod can be designed to be 0-30 mm. When the thickness of each layer of sand at the bottom is determined, the top of the forming scraper 2 can be aligned with the scale corresponding to the thickness to be adjusted, so that the quartz crucible forming device does not need to be taken out during the bottom forming process, and the gap between the forming scraper and the bottom of the mold can be easily and accurately adjusted through the scale.
[0028] Further, please refer again to Figure 1 The quartz crucible forming device of the present invention further includes a guide screw 5; a guide hole is provided at the bottom of the forming scraper 2 near the center ejector pin 6, and the guide screw 5 passes through the guide hole and is connected to the fixing rod 1 through a nut. Specifically, a guide hole is provided at the bottom of the forming scraper 2 near the center ejector pin 6 along the direction of its movement, that is, the vertical direction, and the guide screw 5 passes through the guide hole and can move up and down along the guide hole. When the forming scraper 2 is moved, the guide screw 5 moves up and down in the guide hole following the moving direction of the forming scraper 2, thereby further preventing the forming scraper from moving left and right through the guide hole and the guide screw, and at the same time, the distance of the forming scraper moving up and down can be limited.
[0029] The present invention also provides a quartz crucible forming method, using the quartz crucible forming device as described above, comprising the following steps: S1. Tilt the mold at a certain angle, pour different types of quartz sand into the mold wall in turn, and use different quartz crucible molding devices to mold each layer of quartz sand; S2. After the straight-wall quartz sand is formed, adjust the mold to the 0° position; S3. According to the required molding thickness of each layer of sand at the bottom, adjust the gap between the molding scraper and the bottom of the mold to the corresponding thickness, pour different quartz sands into the bottom of the mold in sequence, and use a quartz crucible molding device for molding.
[0030] When performing straight-wall molding, the mold is tilted, and the outer layer of sand, the middle layer of sand, and the inner layer of sand are poured into the straight wall of the mold in turn, and different quartz crucible molding devices are used to mold each layer of quartz sand. After the straight-wall quartz sand is molded, the mold 7 is adjusted to be vertical to the ground, and the molding scraper is moved according to the required molding thickness of each layer of sand at the bottom to adjust the gap between the molding scraper and the bottom of the mold to the corresponding thickness, and different quartz sands are poured into the bottom of the mold in turn, and the quartz crucible molding device is used for molding. Therefore, the bottom molding thickness can be adjusted as needed during the bottom molding process, and multiple layers of different types of quartz sand can also be molded at the bottom to enrich the sand formula for the bottom and reduce production costs.
[0031] In some embodiments, since the thickness of the straight wall changes after each layer of quartz sand is poured, each layer of sand needs to be molded using a different quartz crucible molding device. Here, the different quartz crucible molding devices mainly have different widths of the molding scraper to adapt to the thickness of different layers of quartz sand. Furthermore, the quartz crucible molding device of the present invention is mainly used in the bottom molding process. When the quartz crucible is molded with straight-walled quartz sand, the existing molding device can be used, and the quartz crucible molding device of the present invention can also be used, which is not limited here.
[0032] In the specific implementation process, in step S1, the mold is tilted at a certain angle, different types of quartz sand are poured into the mold wall in sequence, and different quartz crucible molding devices are used to mold each layer of quartz sand, including the following steps: S11, opening and rotating the mold, adjusting the angle of the mold so that the angle between its axis and the vertical direction is 55-70 degrees, pouring the outer layer of sand into the straight wall of the mold, and using the first molding device to mold the outer layer of sand; under the action of centrifugal force, the quartz sand on the straight wall is close to the surface of the mold and will not fall to the bottom, and the outer layer of sand is scraped flat by the first molding device to form the outer layer of the quartz crucible; S12, after the outer layer of sand is formed, the middle layer of sand is poured into the straight wall portion of the mold, and the middle layer of sand is formed by a second forming device, and the middle layer of sand is flattened by the second forming device to form a transparent layer of the quartz crucible; S13. After the middle layer of sand is formed, the second forming device is replaced with a quartz crucible forming device, and the distance between the forming scraper of the quartz crucible forming device and the bottom of the mold is adjusted to H, and the adjusting screw is rotated to fix and clamp the forming scraper. The forming of the straight-walled inner layer of sand and the forming of the quartz sand at the bottom of the crucible are achieved by the quartz crucible forming device of the present invention. In some embodiments, the quartz crucible forming device at this time is mainly used to form the straight-walled inner layer of sand, and the distance between the forming scraper of the quartz crucible forming device and the bottom of the mold is not important, so H can be set to any distance, which is not limited here.
[0033] S14. Pour the inner layer of sand into the straight wall of the mold, align the center pin with the center hole at the bottom of the mold for positioning, and hold the fixed rod and move it to Figure 3 The inner layer of sand is scraped flat by the forming scraper. After the fixing rod is parallel to the inner wall of the mold, the straight arm of the forming scraper contacts the inner layer of sand at the straight wall of the mold. During the rotation of the mold, the forming scraper scrapes flat the inner layer of sand to ensure that the inner layer of sand is evenly formed on the straight wall of the mold to form the inner layer of the quartz crucible. Thus, steps S11-S14 are completed as follows. Figure 4 The molding of straight-walled quartz sand is shown.
[0034] In the specific implementation process, in step S2, after the straight-wall quartz sand is formed, adjusting the mold to the 0° position includes: after the straight-wall quartz sand is formed, taking out the quartz crucible forming device, and adjusting the mold angle so that the angle between its axis and the vertical direction is 0°. During the entire forming process, the mold is always in a rotating state. Maintaining the mold rotation speed, adjusting the mold angle so that the angle between its axis and the vertical direction is 0°, under the action of centrifugal force, the quartz sand of the straight wall part will not fall to the bottom.
[0035] In the specific implementation process, in step S3, according to the required molding thickness of each layer of sand at the bottom, the gap between the molding scraper and the bottom of the mold is adjusted to the corresponding thickness, and different quartz sands are poured into the bottom of the mold in sequence, and the molding is performed using a quartz crucible molding device, which specifically includes the following steps: S31, rotating the adjusting screw to loosen the forming scraper and the fixing rod, and adjusting the distance between the forming scraper and the bottom of the mold to H1; wherein H1 is determined according to the thickness of the outer layer of sand, and after the forming scraper and the fixing rod are loosened, the forming scraper is moved up and down until the top of the forming scraper is aligned with the scale corresponding to H1; S32, rotate the adjusting screw in the opposite direction to clamp the forming scraper and the fixing rod, and align the center pin with the center hole at the bottom of the mold for positioning; after the top of the forming scraper is aligned with the scale corresponding to H1, the forming scraper and the fixing rod can be clamped and fixed to limit the thickness of the outer layer of sand, and then the center pin is inserted into the center hole at the bottom of the mold; S33, pour a first preset amount of outer layer sand into the bottom of the mold, hold the fixed rod 1 and move it to Figure 5 The bottom outer layer of sand is scraped flat by the forming scraper at a position parallel to the inner wall of the mold; after the fixing rod is parallel to the inner wall of the mold, the bottom arm of the forming scraper contacts the outer layer of sand at the bottom of the mold, and during the rotation of the mold, the forming scraper scrapes flat the outer layer of sand at the bottom to ensure that the outer layer of sand is evenly formed at the bottom of the mold. The first preset amount is determined according to the thickness of the outer layer of sand.
[0036] S34. Adjust the distance between the forming scraper and the bottom of the mold to H2 by adjusting the screw, pour a second preset amount of middle layer sand into the bottom of the mold, and use the forming scraper to scrape the bottom middle layer sand flat; wherein H2 includes the thickness of the outer layer sand and the thickness of the middle layer sand. After adjusting the distance between the forming scraper and the bottom of the mold to H2, there is a gap between the forming scraper and the formed outer layer sand for placing the middle layer sand.
[0037] S35, adjust the distance between the forming scraper and the bottom of the mold to H3 by adjusting the screw rod, pour the third preset amount of inner sand into the bottom of the mold, and use the forming scraper to scrape the inner sand at the bottom flat. Among them, H3>H2>H1, H3 includes the thickness of the outer sand, the thickness of the middle sand and the thickness of the inner sand. After the distance between the forming scraper and the bottom of the mold is adjusted to H3, there is a gap between the forming scraper and the formed middle sand for placing the inner sand. Thus, through steps S31-S35, the following is obtained: Figure 6 The bottom of the shaped quartz crucible is shown as quartz sand.
[0038] In some embodiments, H1 is 3-5 mm, H2 is 11-13 mm, and H3 is 23-25 mm.
[0039] As a specific implementation method, after the straight-wall quartz sand is formed, the crucible rotation speed is maintained, the quartz crucible forming device is taken out, the mold angle is adjusted so that the angle between its axis and the vertical direction is 0°, and the bottom of the quartz crucible is formed. The adjusting screw 4 is turned to loosen the forming scraper 2 and the fixed rod 1, and the forming scraper 2 is moved up and down until the top of the forming scraper 2 is aligned with the 4mm scale on the fixed rod 1, where 4mm is the thickness of the required outer layer of sand; the adjusting screw is turned in the opposite direction to clamp the forming scraper and the fixed rod, and then the center ejector pin is inserted into the center hole at the bottom of the mold 7 to achieve the positioning of the quartz crucible forming device. The outer layer of sand is poured into the bottom of the mold 7, and the fixed rod 1 is held and moved to a position parallel to the inner wall of the mold 7. After the fixed rod is parallel to the inner wall of the mold, the bottom arm of the forming scraper 2 contacts the outer layer of sand at the bottom of the mold 7. During the rotation of the mold, the forming scraper 2 scrapes the outer layer of sand at the bottom flat to ensure that the outer layer of sand is evenly formed at the bottom of the mold, thereby forming the outer layer of the bottom of the quartz crucible.
[0040] After the outer layer of sand is formed, there is no need to take out the quartz crucible forming device. Just turn the adjusting screw 4 to loosen the forming scraper 2 and the fixed rod 1, and move the forming scraper 2 upward until the top of the forming scraper 2 is aligned with the 12mm scale on the fixed rod 1, where 12mm is the required thickness of the middle layer of sand; turn the adjusting screw in the opposite direction to clamp the forming scraper 2 and the fixed rod 1, and then pour the middle layer of sand into the bottom of the mold 7, and use the forming scraper 2 to scrape the middle layer of sand flat to form a transparent layer at the bottom of the quartz crucible.
[0041] After the middle layer of sand is formed, there is no need to take out the quartz crucible forming device. Just turn the adjusting screw 4 to loosen the forming scraper 2 and the fixed rod 1, and move the forming scraper 2 upward until the top of the forming scraper 2 is aligned with the 25mm scale on the fixed rod 1, where 25mm is the required thickness of the middle layer of sand; turn the adjusting screw in the opposite direction to clamp the forming scraper 2 and the fixed rod 1, and then pour the inner layer of sand into the bottom of the mold 7, and use the forming scraper 2 to scrape the inner layer of sand flat to form the inner layer of the bottom of the quartz crucible. Therefore, the quartz crucible forming device disclosed in the present invention is combined with the corresponding quartz crucible forming method, which can not only adjust the bottom forming thickness as needed during the forming process, but also form multiple layers of different types of quartz sand at the bottom, enrich the sand formula for the bottom, and reduce production costs.
[0042] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.
Claims
1. A quartz crucible forming device, characterized in that: include: A fixing rod, a forming scraper, a guide slider, an adjusting screw and a center ejector pin; the forming scraper is connected to the fixing rod through a guide slider, and the forming scraper can move up and down along the fixing rod to adjust the distance between the forming scraper and the bottom of the mold; the adjusting screw is connected to the guide slider through a threaded connection, and is used to fix, clamp or loosen the forming scraper for adjustment; the center ejector pin is installed at the end of the bottom of the fixing rod, and is used to position with the center hole of the bottom of the mold.
2. The quartz crucible forming device according to claim 1, characterized in that: The forming scraper is provided with a threaded hole, and the guide slider is connected to the forming scraper via a bolt; the fixing rod passes through the guide slider and is connected to the forming scraper.
3. The quartz crucible forming device according to claim 2, characterized in that: The upper part of the fixing rod is provided with a scale to facilitate the adjustment of the distance between the forming scraper and the bottom of the mold.
4. The quartz crucible forming device according to claim 3, characterized in that: It also includes a guide screw; a guide hole is opened at the bottom of the forming scraper near the center ejector pin, and the guide screw passes through the guide hole and is connected to the fixing rod through a nut.
5. The quartz crucible forming device according to claim 4, characterized in that: The guide slider comprises a first guide slider and a second guide slider, and the first guide slider is installed on the straight arm of the forming scraper at a preset distance from the second guide slider.
6. A quartz crucible forming method, using the quartz crucible forming device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Tilt the mold at a certain angle, pour different types of quartz sand into the mold wall in turn, and use different quartz crucible molding devices to mold each layer of quartz sand; S2. After the straight-wall quartz sand is formed, adjust the mold to the 0° position; S3. According to the required molding thickness of each layer of sand at the bottom, adjust the gap between the molding scraper and the bottom of the mold to the corresponding thickness, pour different quartz sands into the bottom of the mold in sequence, and use a quartz crucible molding device for molding.
7. The method for forming a quartz crucible according to claim 6, characterized in that: In step S1, the mold is tilted at a certain angle, different types of quartz sand are poured into the mold wall in sequence, and different quartz crucible molding devices are used to mold each layer of quartz sand, including the following steps: S11, opening and rotating the mold, adjusting the mold angle so that the angle between its axis and the vertical direction is 55-70°, pouring the outer layer of sand into the straight wall portion of the mold, and using the first molding device to mold the outer layer of sand; S12, after the outer layer of sand is formed, the middle layer of sand is poured into the straight wall portion of the mold, and the middle layer of sand is formed by a second forming device; S13, after the middle layer of sand is formed, the second forming device is replaced with a quartz crucible forming device, and the distance between the forming scraper of the quartz crucible forming device and the bottom of the mold is adjusted to H, and the adjusting screw is rotated to fix and clamp the forming scraper; S14. Pour the inner layer of sand into the straight wall of the mold, align the center pin with the center hole at the bottom of the mold for positioning, move the fixed rod by hand to a position parallel to the inner wall of the mold, and use the forming scraper to scrape the inner layer of sand flat.
8. The method for forming a quartz crucible according to claim 6, characterized in that: In step S2, after the straight-wall quartz sand is formed, adjusting the mold to the 0° position includes: after the straight-wall quartz sand is formed, taking out the quartz crucible forming device, and adjusting the mold angle so that the angle between its axis and the vertical direction is 0°.
9. The method for forming a quartz crucible according to claim 6, characterized in that: In step S3, according to the required molding thickness of each layer of sand at the bottom, the gap between the molding scraper and the bottom of the mold is adjusted to the corresponding thickness, and different quartz sands are poured into the bottom of the mold in sequence, and the molding is performed using a quartz crucible molding device, which specifically includes the following steps: S31, turn the adjusting screw to loosen the forming scraper and the fixing rod, and adjust the distance between the forming scraper and the bottom of the mold to H1; S32, rotate the adjusting screw in the opposite direction to clamp the forming scraper and the fixing rod, and align the center pin with the center hole at the bottom of the mold for positioning; S33, pouring a first preset amount of outer layer sand into the bottom of the mold, holding the fixed rod and moving it to a position parallel to the inner wall of the mold, and using the forming scraper to scrape the outer layer sand at the bottom flat; S34, adjusting the distance between the forming scraper and the bottom of the mold to H2 by adjusting the screw, pouring a second preset amount of middle layer sand into the bottom of the mold, and using the forming scraper to scrape the bottom middle layer sand flat; S35, adjusting the distance between the forming scraper and the bottom of the mold to H3 by adjusting the screw, pouring a third preset amount of inner layer sand into the bottom of the mold, and using the forming scraper to scrape the bottom inner layer sand flat.
10. The method for forming a quartz crucible according to claim 9, characterized in that: H1 is 3-5mm, H2 is 11-13mm, and H3 is 23-25mm.