Automatic forming device and method for quartz crucible

Abstract

The invention relates to an automatic forming device and method for a quartz crucible. By additionally arranging the forming structure which comprises the supporting frame, the forming plate connected to the supporting frame through the connecting plate, the forming plate vertical driving mechanism and the forming plate horizontal driving mechanism, and the forming plate vertical driving mechanism and the forming plate horizontal driving mechanism are arranged on the supporting frame, feeding and forming before quartz sand melting are efficiently completed, meanwhile, manpower is reduced, and the production efficiency is improved. The quartz sand is prevented from being polluted, and the product cleanliness is improved. Furthermore, an automatic feeding structure comprising a fixed frame, a feeder vertical driving mechanism and a feeder horizontal driving mechanism which are arranged on the fixed frame, and at least two groups of feeding mechanisms is additionally arranged, so that the automatic feeding device can be adapted to feeding of quartz crucibles with different sizes and specifications; the automatic degree of feeding is improved, the possibility of pollution caused by a traditional feeding mode can be reduced, the quartz sand feeding efficiency is improved, the production cost of quartz crucibles is effectively reduced, and the product quality of the quartz crucibles is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of crucible manufacturing, and particularly to an automatic forming device and method for a quartz crucible. Background Art

[0002] A quartz crucible is a product manufactured from natural or synthetic quartz sand as raw materials after a series of processes such as melting, cutting, and washing. It is widely used in the photovoltaic, semiconductor, and chemical industries, mostly as a container. For example, in the semiconductor industry, a quartz crucible is an essential container for crystal growth and affects the quality of crystal growth. In the manufacture of quartz crucibles, the feeding and forming of quartz sand is a relatively crucial step. Currently, most quartz crucible manufacturers on the market adopt the method of manual feeding and forming, relying on a forming rod manually grasped by personnel according to a special shape design to complete the loading and forming of quartz sand in the mold before melting. The existing manual forming method not only consumes labor but also has very high technical requirements for personnel. Especially in a high-temperature environment, the sweat of the operator is an important factor affecting the finished product index of the crucible. Therefore, there are many drawbacks in the manual forming method. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic forming device and method for a quartz crucible, which can efficiently complete the feeding and forming of quartz sand before melting, reduce the use of labor, avoid polluting the quartz sand, and increase the cleanliness of the product.

[0004] According to some embodiments, the present invention provides an automatic forming device for a quartz crucible, including: a melting mold structure, including a melting mold body, a melting mold horizontal driving mechanism, and a melting mold rotating mechanism. The melting mold body has a receiving cavity for receiving the fed quartz sand. The melting mold horizontal driving mechanism is used to drive the melting mold body to horizontally move to the material receiving process position. The melting mold rotating mechanism is used to drive the melting mold body to rotate at a set process speed; a feeding structure, including a quartz sand feeder, a quartz sand feeding pipe connected to the quartz sand feeder, and a gas purging pipe connected to the quartz sand feeding pipe. The feeding structure can continuously feed the quartz sand contained in the quartz sand feeder into the receiving cavity through the quartz sand feeding pipe under the gas purging of the gas purging pipe; and a forming structure, including a support frame, a forming plate connected to the support frame through a connecting plate, and a forming plate vertical driving mechanism and a forming plate horizontal driving mechanism arranged on the support frame. The forming plate vertical driving mechanism is used to drive the forming plate to vertically move, and the forming plate horizontal driving mechanism is used to drive the forming plate to horizontally move to move the forming plate to the forming process position in the receiving cavity. The shape of the forming side of the forming plate close to the inner wall of the melting mold body is adapted to the sectional contour line shape of the inner wall of the melting mold body.

[0005] In some embodiments, the feeding structure and the shaping structure are respectively arranged on opposite sides of the melting mold body; in the rotation direction of the melting mold body, the discharge port of the quartz sand feeding pipe is located at the front end of the shaping plate; at the shaping process position, a set spacing is provided between the shaping plate and the inner wall of the melting mold body to form an annular space region, and the shaping plate can shape the fed quartz sand within the annular space region.

[0006] According to some other embodiments, the present invention further provides a method for automatically forming a quartz crucible. Using the quartz crucible automatic forming device of the present invention, the method includes the following steps: Before the start of quartz sand feeding, drive the melting mold body to move horizontally to the material receiving process position through the horizontal driving mechanism of the melting mold, and drive the melting mold body to rotate at a set process speed through the melting mold rotation mechanism; move the discharge port of the quartz sand feeding pipe to the feeding process position within the accommodating cavity; respectively drive the shaping plate to move through the vertical driving mechanism of the shaping plate and the horizontal driving mechanism of the shaping plate, and move the shaping plate to the shaping process position within the accommodating cavity; feed quartz sand into the accommodating cavity through the quartz sand feeding pipe, and scrape and shape the fed quartz sand through the relative movement between the shaping plate and the inner wall of the melting mold body; and after the completion of the quartz sand feeding and shaping, move the discharge port of the quartz sand feeding pipe away from the accommodating cavity and respectively drive the shaping plate to move through the vertical driving mechanism of the shaping plate and the horizontal driving mechanism of the shaping plate to move the shaping plate away from the accommodating cavity.

[0007] In some embodiments, the method further includes the following steps: Shaping plate movement step: respectively drive the shaping plate to move through the vertical driving mechanism of the shaping plate and the horizontal driving mechanism of the shaping plate, and move the shaping plate to the target shaping process position within the accommodating cavity; Feeding and shaping step: feed target quartz sand into the accommodating cavity through the quartz sand feeding pipe, and scrape and shape the target quartz sand through the relative movement between the shaping plate and the inner wall of the melting mold body to form a target quartz sand layer, the thickness of the target quartz sand layer being the spacing between the target shaping process position and the inner wall of the melting mold body; and repeatedly execute the above shaping plate movement step and feeding and shaping step to form at least two quartz sand layers with gradually increasing quartz sand purity along the inner side surface of the melting mold body towards the axis of the melting mold body.

[0008] In some embodiments, when the feeding structure includes a fixed frame, a feeder vertical drive mechanism and a feeder horizontal drive mechanism arranged on the fixed frame, and at least two groups of feeding mechanisms, each group of the feeding mechanisms includes the quartz sand feeder, the quartz sand feeding pipe and the gas purge pipe, the purity of the quartz sand contained in different quartz sand feeders is different, a material stop valve is arranged between each of the quartz sand feeders and the corresponding quartz sand feeding pipe, each group of the feeding mechanisms also includes a weighing sensor, and all the feeding mechanisms can work in time sharing, the feeding and molding step also includes the following steps: controlling the corresponding material stop valve to open according to the feeding control signal, and continuously feeding the corresponding target weight of quartz sand contained in the corresponding quartz sand feeder through the quartz sand feeding pipe into the containing cavity for molding under the gas purge of the corresponding gas purge pipe; and when the weighing sensor senses that the weight of the quartz sand fed reaches the target weight, controlling the corresponding material stop valve to close.

[0009] The above technical solution, by adding a forming structure including a support frame, a forming plate connected to the support frame through a connecting plate, and a forming plate vertical driving mechanism and a forming plate horizontal driving mechanism arranged on the support frame, takes into account the efficient completion of the quartz sand before melting feeding and forming, while reducing the use of manual labor, avoiding the contamination of quartz sand, and increasing the cleanliness of the product. Further, by adding an automatic feeding structure including a fixed frame, a feeder vertical driving mechanism and a feeder horizontal driving mechanism arranged on the fixed frame, and at least two groups of feeding mechanisms, all the feeding mechanisms can work in time-sharing mode under the gas purge of the corresponding gas purge pipe to continuously feed the quartz sand contained in the corresponding quartz sand feeder into the containing cavity through the quartz sand feeding pipe for forming, which can adapt to the feeding of quartz crucibles of different sizes and specifications, improve the degree of automation of feeding, reduce the possibility of pollution caused by traditional feeding methods, improve the efficiency of quartz sand feeding, effectively reduce the production cost of quartz crucibles, and improve the product quality of quartz crucibles. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 is a schematic front cross-sectional view of the automatic quartz crucible forming device according to the first embodiment of the present invention;

[0012] Figure 2 yes Figure 1 A schematic cross-sectional view of the middle molding structure;

[0013] Figure 3 It is a top view schematic diagram of the automatic quartz crucible forming device according to the first embodiment of the present invention;

[0014] Figure 4 It is a front view cross-sectional schematic diagram of the automatic quartz crucible forming device according to the second embodiment of the present invention;

[0015] Figure 5 It is a side view cross-sectional schematic diagram of the automatic quartz crucible forming device according to the second embodiment of the present invention;

[0016] Figure 6 It is a flowchart of the automatic feeding method for manufacturing a quartz crucible according to an embodiment of the present invention.

[0017] Description of reference numerals:

[0018] 11, melting die body; 111, accommodation cavity; 119, axis;

[0019] 12, horizontal driving mechanism of melting die; 13, rotating mechanism of melting die;

[0020] 21, quartz sand feeder; 211, material cut-off valve;

[0021] 22, quartz sand feeding pipe; 23, gas purge pipe;

[0022] 221, first vertical section; 222, bending section; 223, second vertical section; 229, discharge port;

[0023] 24, fixing frame; 241, vertical beam; 242, cross beam;

[0024] 25, vertical driving mechanism of feeder; 26, horizontal driving mechanism of feeder

[0025] 27, weighing sensor;

[0026] 31, support frame; 32, vertical driving mechanism of forming plate; 321, vertical sliding rod;

[0027] 33, horizontal driving mechanism of forming plate; 331, horizontal sliding rod;

[0028] 34, forming plate; 341, forming side; 342, fixed side;

[0029] 35, connecting plate; 351, connecting support part; 352, bending part. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] The present invention provides an automatic forming device for a quartz crucible.

[0032] For the convenience of description, in the following embodiments, the horizontal direction may be the X-axis or Y-axis direction in the Cartesian coordinate system, and the vertical direction is the Z-axis direction in the Cartesian coordinate system.

[0033] Please refer to Figures 1 to 3 , wherein Figure 1 is the front view sectional schematic diagram of the automatic forming device for a quartz crucible according to the first embodiment of the present invention; Figure 2 is Figure 1 the sectional schematic diagram of the forming structure part in Figure 3 is the top view schematic diagram of the automatic forming device for a quartz crucible according to the first embodiment of the present invention. As Figures 1 to 3 shown, the automatic forming device for a quartz crucible described in this embodiment includes: a melting die structure, a feeding structure, and a forming structure.

[0034] Specifically, the melting die structure includes a melting die body 11, a melting die horizontal driving mechanism 12, and a melting die rotating mechanism 13. The melting die body 11 has a receiving cavity 111 for receiving the put quartz sand. The melting die horizontal driving mechanism 12 is used to drive the melting die body 11 to horizontally move to the material receiving process position. The melting die horizontal driving mechanism 12 is also used to drive the melting die body 11 to horizontally move to the process position where crucible melting and crucible taking can be completed. The melting die rotating mechanism 13 is used to drive the melting die body 11 to rotate at a set process speed, so that the quartz sand put into the receiving cavity 111 forms a quartz sand crucible blank under the action of rotational centrifugal force. The ways of fixing, moving, and rotating the melting die body 11 can refer to the existing implementation ways, which will not be elaborated here.

[0035] Specifically, the feeding structure includes a quartz sand feeder 21, a quartz sand feeding pipe 22 connected to the quartz sand feeder 21, and a gas purging pipe 23 connected to the quartz sand feeding pipe 22. The feeding structure can continuously put the quartz sand contained in the quartz sand feeder 21 into the receiving cavity 111 through the quartz sand feeding pipe 22 under the gas purging of the gas purging pipe 23.

[0036] Specifically, the forming structure includes a support frame 31, a forming plate 34 connected to the support frame 31 through a connecting plate 35, and a forming plate vertical driving mechanism 32 and a forming plate horizontal driving mechanism 33 arranged on the support frame 31. The forming plate vertical driving mechanism 32 is used to drive the forming plate 34 to move vertically (move vertically along the vertical slide bar 321), and the forming plate horizontal driving mechanism 33 is used to drive the forming plate 34 to move horizontally (move horizontally along the horizontal slide bar 331) to move the forming plate 34 to the forming process position in the accommodation cavity 111. The shape of the forming side 341 of the forming plate 34 close to the inner wall of the melting mold body 11 is adapted to the shape of the cross-sectional contour line of the inner wall of the melting mold body 11, so that when the forming plate 34 moves to the forming process position in the accommodation cavity 111, the forming side 341 and the inner wall of the melting mold body 11 are arranged at a set distance to form an annular space area. Through the relative movement between the forming plate 34 and the inner wall of the melting mold body 11, the put quartz sand can be shaped in the annular space area. By putting quartz sand with a target purity into the accommodation cavity 111, a quartz crucible blank is automatically formed by the action of the forming plate and centrifugal force. The distance between the forming plate 34 and the inner wall of the melting mold body 11 is set according to the product process.

[0037] In some embodiments, when the melting mold rotating mechanism 13 drives the melting mold body 11 to rotate at a set process speed, the axis 119 of the melting mold body 11 is parallel to the vertical direction Y. Compared with the traditional inclined feeding of the melting mold body, the amount of quartz sand scattered during the feeding process is greatly reduced in this embodiment.

[0038] In some embodiments, the quartz sand feeding pipe 22 feeds quartz sand in a direction perpendicular to the bottom surface of the inner wall of the melting mold body 11, and the discharge port 229 of the quartz sand feeding pipe 22 extends into the accommodation cavity 111. Further, the distance between the discharge port 229 of the quartz sand feeding pipe 22 and the bottom surface of the inner wall of the melting mold body 11 is a preset distance (the preset distance is greater than the thickness of the to-be-formed quartz sand crucible blank), so that the discharge port 229 of the quartz sand feeding pipe 22 can extend into the accommodation cavity 111 as much as possible, reducing the amount of quartz sand scattered during the feeding process.

[0039] In some embodiments, the quartz sand feeding pipe 22 has a first vertical section 221 connected to the quartz sand feeder 21, a bent section 222 connecting the first vertical section 221 and bent in the direction of the axis 119 of the melting mold body 11, and a second vertical section 223 connecting the bent section 222 and extending away from the quartz sand feeder 21, so as to facilitate the discharge port 229 located in the second vertical section 223 to extend into the accommodation cavity 111.

[0040] In some embodiments, a material cut-off valve 211 is provided between the quartz sand feeder 21 and the quartz sand feeding pipe 21 to control the opening and closing of the feeding. The material cut-off valve 211 can be controlled by a feeding control signal to open for continuous feeding of quartz sand, and controlled to close after the feeding is completed. The material cut-off valve 211 can also control the amount of the fed material.

[0041] In some embodiments, a solenoid valve is provided between each gas purge pipe 23 and the corresponding quartz sand feeding pipe 22 to control the opening and closing of the gas purge. The solenoid valve can also control the amount of the purging gas.

[0042] In some embodiments, the forming plate 34 is made of quartz to avoid contamination of the quartz sand by the forming plate 34 during the quartz sand forming process and improve the product cleanliness.

[0043] In some embodiments, the connecting plate 35 is made of a metal plate member to provide sufficient connection and support strength.

[0044] In some embodiments, the connecting plate 35 has a connection and support portion 351 connected to the support frame 31 and a bent portion 352 connecting the connection and support portion 351 and fixedly connected to the fixed side 342 of the forming plate 34 away from the inner wall of the melting die body 11, so as to facilitate the forming plate 34 to extend into the accommodation cavity 111.

[0045] In some embodiments, the feeding structure and the forming structure are respectively arranged on opposite sides of the melting die body 11 to facilitate the layout.

[0046] In some embodiments, in the rotation direction of the melting die body 11, the discharge port 229 of the quartz sand feeding pipe 22 is located at the front end of the forming plate 34 to improve the forming effect. There is a spacing between the feeding process position of the discharge port 229 of the quartz sand feeding pipe 22 in the accommodation cavity 111 and the forming process position of the forming plate 34 in the accommodation cavity 111 to improve the forming effect.

[0047] In some embodiments, at the forming process position, a set spacing is formed between the forming plate 34 and the inner wall of the melting die body 11 to form an annular space region, and the forming plate 34 can shape the fed quartz sand in the annular space region.

[0048] Please refer to Figures 4 to 5 , wherein, Figure 4 is the main view cross-sectional schematic diagram of the automatic quartz crucible forming device according to the second embodiment of the present invention; Figure 5It is a schematic side cross-sectional view of the automatic forming device for quartz crucibles described in the second embodiment of the present invention; Figures 4 to 5 For simplicity of illustration, the forming plate is not shown in the figure. As Figures 4 to 5 shown, the difference from the embodiment shown in Figures 1 to 3 is that in this embodiment, the feeding structure is an automatic feeding structure, including a fixed frame 24, a feeding device vertical driving mechanism 25 and a feeding device horizontal driving mechanism 26 provided on the fixed frame 24, and at least two groups of feeding mechanisms. Each group of the feeding mechanisms includes the quartz sand feeder 21, the quartz sand feeding pipe 22, and the gas purging pipe 23; all the feeding mechanisms can work in a time-sharing manner to feed the quartz sand contained in the corresponding quartz sand feeder 22 into the accommodation cavity 111. Among them, the purity of the quartz sand contained in different quartz sand feeders is different.

[0049] The feeding device vertical driving mechanism 25 is used to drive the feeding mechanism to move vertically, and the feeding device horizontal driving mechanism 26 is used to drive the feeding mechanism to move horizontally; through the cooperation of the feeding device vertical driving mechanism 25 and the feeding device horizontal driving mechanism 26, the discharge port 229 of the quartz sand feeding pipe 22 is moved to the feeding process position in the accommodation cavity 111; wherein, there is a spacing between the feeding process position and the forming process position.

[0050] In some embodiments, all the feeding mechanisms are arranged side by side and can be moved simultaneously. All the feeding mechanisms can work in a time-sharing manner, and under the gas purging of the corresponding gas purging pipe 23, the quartz sand contained in the corresponding quartz sand feeder 21 is continuously fed into the accommodation cavity 111 through the quartz sand feeding pipe 22 for forming; among them, the purity of the quartz sand contained in different quartz sand feeders 21 is different. Before the quartz sand feeding starts, the feeding mechanism is driven to move by the feeding device vertical driving mechanism 25 and the feeding device horizontal driving mechanism 26 respectively, so that the discharge port 229 of the quartz sand feeding pipe 22 is moved to the feeding process position in the accommodation cavity 111; after the quartz sand feeding and forming are completed, the feeding mechanism is driven to move by the feeding device vertical driving mechanism 25 and the feeding device horizontal driving mechanism 26 respectively, so that the discharge port 229 of the quartz sand feeding pipe 22 is moved away from the accommodation cavity 111 (for example, back to the original position). The structure of the automatic feeding structure is simple, can adapt to the feeding of quartz crucibles with different size specifications, reduce the possibility of pollution caused by the traditional feeding method, improve the efficiency of quartz sand feeding, effectively reduce the production cost of quartz crucibles, and improve the product quality of quartz crucibles.

[0051] In this embodiment, the fixing frame 24 is fixed in an area outside the outer periphery of the melting die body 11. The vertical driving mechanism 25 of the feeder is arranged on the vertical beam 241 of the fixing frame 24, and the quartz sand feeder 21 and the horizontal driving mechanism 26 of the feeder are both arranged on the cross beam 242 of the fixing frame 24.

[0052] In some embodiments, each quartz sand feeder 21 contains quartz sand of a corresponding target weight. The required target weight of quartz sand can be pre-weighed and placed into the corresponding quartz sand feeder 21. After moving the discharge port 229 of the quartz sand feeding pipe 22 to the feeding process position in the accommodation cavity 111, the corresponding target weight of quartz sand is continuously fed. When there is no quartz sand in the corresponding quartz sand feeder 21, the feeding is completed; then switch to the next quartz sand feeder 21 to start feeding.

[0053] In some embodiments, a material cut-off valve 211 is provided between each quartz sand feeder 21 and the corresponding quartz sand feeding pipe 22 to control the opening and closing of the feeding. The corresponding material cut-off valve 211 can be controlled to open by a feeding control signal for continuous feeding of quartz sand, and controlled to close after the feeding is completed; then switch to the next quartz sand feeder 21 to start feeding. The material cut-off valve 211 can also control the amount of the fed material.

[0054] In some embodiments, each set of the feeding mechanisms further includes a weighing sensor 27 for sensing the weight of the quartz sand fed by the corresponding quartz sand feeder 21. The automatic feeding structure further includes a controller (not shown) for controlling the corresponding material cut-off valve 211 to open according to the feeding control signal, and for controlling the corresponding material cut-off valve 211 to close when the weight of the fed quartz sand sensed by the weighing sensor 27 reaches the target weight.

[0055] Figures 4 to 5Two groups of feeding mechanisms are shown. The two groups of feeding mechanisms are arranged side by side and can be moved simultaneously. According to the process ratio of the quartz layers required for the quartz crucible, the outer-layer quartz sand and the inner-layer quartz sand are respectively fed. Specifically, the material cut-off valve 211 of the quartz sand feeder 21 containing the outer-layer quartz sand is opened (it can be opened according to the set valve opening degree) for continuous feeding, and the corresponding gas purge pipe 23 blows air simultaneously until the feeding of the outer-layer quartz sand is completed (until the corresponding weighing sensor 27 reaches the set target weight value); during the feeding, the corresponding quartz sand layer can be formed by using the forming plate 34. The feeding mechanism containing the inner-layer quartz sand completes the feeding of the inner-layer quartz sand according to the same process. Among them, the purity of the outer-layer quartz sand is less than that of the inner-layer quartz sand. According to the process ratio of the quartz layers required for the quartz crucible, three groups of feeding mechanisms or more can also be set. For a three-layer or more process formula, the above feeding process is also executed. Specifically, multiple quartz sand layers are sequentially formed along the inner side surface of the melting mold body towards the axis of the melting mold body, and the purity of the quartz sand in the multiple quartz sand layers increases sequentially.

[0056] Based on the same inventive concept, the present invention also provides an automatic feeding method for manufacturing a quartz crucible.

[0057] Please refer to Figure 6 , which is a flowchart of the automatic feeding method for manufacturing a quartz crucible according to an embodiment of the present invention. As Figure 6 shown, the automatic feeding method for manufacturing a quartz crucible described in this embodiment uses the quartz crucible automatic forming device according to Figures 1 to 5 any one of the embodiments of the present invention. The method includes the following steps: S1. Before the start of quartz sand feeding, drive the melting mold body to move horizontally to the material receiving process position through the melting mold horizontal drive mechanism, and drive the melting mold body to rotate at a set process speed through the melting mold rotation mechanism; S2. Move the discharge port of the quartz sand feeding pipe to the feeding process position in the accommodating cavity; S3. Drive the forming plate to move respectively through the forming plate vertical drive mechanism and the forming plate horizontal drive mechanism, and move the forming plate to the forming process position in the accommodating cavity; S4. Feed quartz sand into the accommodating cavity through the quartz sand feeding pipe, and scrape and shape the quartz sand fed into the accommodating cavity through the relative movement between the forming plate and the inner wall of the melting mold body; and S5. After the completion of quartz sand feeding and shaping, move the discharge port of the quartz sand feeding pipe away from the accommodating cavity and drive the forming plate to move respectively through the forming plate vertical drive mechanism and the forming plate horizontal drive mechanism to move the forming plate away from the accommodating cavity.

[0058] In some embodiments, the method further includes the following steps: (1) Forming plate moving step: driving the forming plate to move respectively through the forming plate vertical driving mechanism and the forming plate horizontal driving mechanism, and moving the forming plate to the target forming process position in the accommodation cavity; (2) Feeding and forming step: feeding target quartz sand into the accommodation cavity through the quartz sand feeding pipe, and scraping and shaping the target quartz sand through the relative movement between the forming plate and the inner wall of the melting mold body to form a target quartz sand layer, the thickness of the target quartz sand layer being the distance between the target forming process position and the inner wall of the melting mold body; and (3) Repeatedly executing the above-mentioned forming plate moving step and feeding and forming step to form at least two quartz sand layers with gradually increasing quartz sand purity along the inner side surface of the melting mold body towards the axis of the melting mold body.

[0059] For example, (1) driving the forming plate to move respectively through the forming plate vertical driving mechanism and the forming plate horizontal driving mechanism, and moving the forming plate to the first forming process position in the accommodation cavity; (2) feeding first-purity quartz sand into the accommodation cavity through the quartz sand feeding pipe, and scraping and shaping the first-purity quartz sand fed into the accommodation cavity through the relative movement between the forming plate and the inner wall of the melting mold body to form a first target quartz sand layer, the thickness of the first target quartz sand layer being the first distance between the first target forming process position and the inner wall of the melting mold body; (3) driving the forming plate to move respectively through the forming plate vertical driving mechanism and the forming plate horizontal driving mechanism, and moving the forming plate to the second forming process position in the accommodation cavity, the second distance between the second forming process position and the inner wall of the melting mold body being greater than the first distance; (4) feeding second-purity quartz sand into the accommodation cavity through the quartz sand feeding pipe, and scraping and shaping the second-purity quartz sand through the relative movement between the forming plate and the inner wall of the melting mold body to form a second target quartz sand layer. The second purity is greater than the first purity, thereby forming at least two quartz sand layers with gradually increasing quartz sand purity along the inner side surface of the melting mold body towards the axis of the melting mold body. According to the process ratio of the quartz layers required for the quartz crucible, three or more quartz sand layers can also be formed by executing the above-mentioned feeding and forming process.

[0060] In some embodiments, such as Figures 4 to 5As shown, when the feeding structure is an automatic feeding structure, it includes a fixed frame 24, a feeder vertical drive mechanism 25 and a feeder horizontal drive mechanism 26 arranged on the fixed frame 24, and at least two groups of feeding mechanisms; each group of the feeding mechanism includes the quartz sand feeder 21, the quartz sand feeding pipe 22 and the gas purge pipe 23, and the purity of the quartz sand contained in different quartz sand feeders is different; a material stop valve 211 is arranged between each of the quartz sand feeders 21 and the corresponding quartz sand feeding pipe 22, and each group of the feeding mechanism also includes a weighing sensor 27. When all the feeding mechanisms can work in time sharing, the The step of feeding target quartz sand into the containing cavity through the quartz sand feeding pipe, and scraping and shaping the target quartz sand to form a target quartz sand layer through the relative movement of the molding plate and the inner wall of the melting mold body also includes the following steps: (21) controlling the corresponding material shut-off valve to open according to the feeding control signal, and continuously feeding the corresponding target weight of quartz sand contained in the corresponding quartz sand feeder into the containing cavity through the quartz sand feeding pipe under the gas purge of the corresponding gas purge pipe for molding; and (22) when the weight of the quartz sand fed reaches the target weight as sensed by the weighing sensor, controlling the corresponding material shut-off valve to close.

[0061] The above embodiment of the present invention, by adding a molding structure including a support frame, a molding plate connected to the support frame through a connecting plate, and a molding plate vertical drive mechanism and a molding plate horizontal drive mechanism disposed on the support frame, takes into account the efficient completion of the quartz sand before melting feeding molding, while reducing the use of labor, avoiding the contamination of quartz sand, and increasing the cleanliness of the product. Further, by adding an automatic feeding structure including a fixed frame, a feeder vertical drive mechanism and a feeder horizontal drive mechanism disposed on the fixed frame, and at least two groups of feeding mechanisms, all the feeding mechanisms can work in time-sharing mode under the gas purge of the corresponding gas purge pipe to continuously feed the quartz sand contained in the corresponding quartz sand feeder into the containing cavity through the quartz sand feeding pipe for molding, which can adapt to the feeding of quartz crucibles of different sizes and specifications, improve the degree of automation of feeding, reduce the possibility of pollution caused by traditional feeding methods, improve the efficiency of quartz sand feeding, effectively reduce the production cost of quartz crucibles, and improve the product quality of quartz crucibles.

[0062] It should be noted that the terms "including" and "having" and their variants involved in the documents of the present invention are intended to cover non-exclusive inclusion. The terms "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. Unless the context clearly indicates otherwise, it should be understood that the data used in this way can be interchanged under appropriate circumstances. The term "one or more" depends at least in part on the context and can be used to describe a feature, structure or property in the singular sense, or can be used to describe a combination of features, structures or features in the plural sense. The term "based on" can be understood as not necessarily intended to express a set of exclusive factors, but rather, alternatively, and also at least in part depending on the context, allows for the existence of other factors that are not necessarily explicitly described. Additionally, in the case of no conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Furthermore, in the above description, the description of well-known components and technologies is omitted to avoid unnecessarily confusing the concepts of the present invention. In each of the above embodiments, the key point of each embodiment is to illustrate the differences from other embodiments. For the same / similar parts among the embodiments, reference can be made to each other.

[0063] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic forming device for a quartz crucible, characterized in that, Comprising: A melting mold structure, including a melting mold body, a horizontal driving mechanism of the melting mold, and a rotating mechanism of the melting mold. The melting mold body has a receiving cavity for receiving the quartz sand to be put in. The horizontal driving mechanism of the melting mold is used to drive the melting mold body to horizontally move to the material receiving process position, and the rotating mechanism of the melting mold is used to drive the melting mold body to rotate at a set process speed; A feeding structure, including a quartz sand feeder, a quartz sand feeding pipe connected to the quartz sand feeder, and a gas purging pipe connected to the quartz sand feeding pipe. The feeding structure can continuously put the quartz sand contained in the quartz sand feeder into the receiving cavity through the quartz sand feeding pipe under the gas purging of the gas purging pipe; And A forming structure, including a support frame, a forming plate connected to the support frame through a connecting plate, and a vertical driving mechanism and a horizontal driving mechanism of the forming plate arranged on the support frame. The vertical driving mechanism of the forming plate is used to drive the forming plate to vertically move, and the horizontal driving mechanism of the forming plate is used to drive the forming plate to horizontally move, so as to move the forming plate to the forming process position in the receiving cavity. The shape of the forming side of the forming plate close to the inner wall of the melting mold body is adapted to the cross-sectional contour line shape of the inner wall of the melting mold body.

2. The automatic forming device for quartz crucibles according to claim 1, wherein When the rotating mechanism of the melting mold drives the melting mold body to rotate at a set process speed, the axis of the melting mold body is parallel to the vertical direction; The quartz sand feeding pipe has a first vertical section connected to the quartz sand feeder, a bent section connecting the first vertical section and bent towards the axis direction of the melting mold body, and a second vertical section connecting the bent section and extending away from the quartz sand feeder; The quartz sand feeding pipe feeds the quartz sand in a direction perpendicular to the bottom surface of the inner wall of the melting mold body, and the discharge port of the quartz sand feeding pipe extends into the receiving cavity.

3. The automatic forming device for quartz crucibles according to claim 1, wherein The connecting plate has a connecting support portion connected to the support frame and a bent portion connecting the connecting support portion and fixedly connected to the fixed side of the forming plate away from the inner wall of the melting mold body; The material of the forming plate is quartz, and the connecting plate is made of a metal plate.

4. The automatic forming device for quartz crucibles according to claim 1, characterized in that, The feeding structure and the forming structure are respectively arranged on opposite sides of the melting mold body; In the rotating direction of the melting mold body, the discharge port of the quartz sand feeding pipe is located at the front end of the forming plate; At the forming process position, a set spacing is formed between the forming plate and the inner wall of the melting mold body to form an annular space area, and the forming plate can shape the put quartz sand in the annular space area.

5. The automatic forming device for quartz crucibles according to claim 1, wherein, A material cut-off valve is arranged between the quartz sand feeder and the quartz sand feeding pipe for controlling the opening and closing of feeding; an electromagnetic valve is arranged between the gas purging pipe and the quartz sand feeding pipe for controlling the opening and closing of gas purging.

6. The automatic forming device for quartz crucibles according to claim 5, wherein, The feeding structure includes a fixed frame, a vertical driving mechanism of the feeder and a horizontal driving mechanism of the feeder arranged on the fixed frame, and at least two groups of feeding mechanisms. Each group of the feeding mechanisms includes the quartz sand feeder, the quartz sand feeding pipe and the gas purging pipe. The vertical driving mechanism of the feeder is used to drive the feeding mechanism to move vertically, and the horizontal driving mechanism of the feeder is used to drive the feeding mechanism to move horizontally, so as to move the discharge port of the quartz sand feeding pipe to the feeding process position in the accommodating cavity. There is a spacing between the feeding process position and the forming process position. All the feeding mechanisms can work in a time-sharing manner to put the quartz sand contained in the corresponding quartz sand feeder into the accommodating cavity, and the purity of the quartz sand contained in different quartz sand feeders is different.

7. The automatic forming device for quartz crucibles according to claim 6, wherein, Each group of the feeding mechanisms further includes a weighing sensor for sensing the weight of the quartz sand discharged from the corresponding quartz sand feeder. The automatic feeding structure further includes a controller for controlling the opening of the corresponding material cut-off valve according to the feeding control signal, and for controlling the closing of the corresponding material cut-off valve when the weight of the discharged quartz sand sensed by the weighing sensor reaches the target weight.

8. An automatic forming method for a quartz crucible, characterized in that, Using the quartz crucible automatic forming device according to any one of claims 1 to 7, the method includes the following steps: Before the quartz sand feeding starts, drive the melting mold body to move horizontally to the material receiving process position by the horizontal driving mechanism of the melting mold, and drive the melting mold body to rotate at a set process speed by the melting mold rotating mechanism; Move the discharge port of the quartz sand feeding pipe to the feeding process position in the accommodating cavity; Drive the forming plate to move by the vertical driving mechanism of the forming plate and the horizontal driving mechanism of the forming plate respectively, and move the forming plate to the forming process position in the accommodating cavity; Feed quartz sand into the accommodating cavity through the quartz sand feeding pipe, and scrape and shape the quartz sand fed into the accommodating cavity through the relative movement between the forming plate and the inner wall of the melting mold body; and After the quartz sand feeding and forming are completed, move the discharge port of the quartz sand feeding pipe away from the accommodating cavity and drive the forming plate to move by the vertical driving mechanism of the forming plate and the horizontal driving mechanism of the forming plate respectively to move the forming plate away from the accommodating cavity.

9. The automatic forming method of the quartz crucible according to claim 8, characterized in that, The method further includes the following steps: Forming plate moving step: Drive the forming plate to move by the vertical driving mechanism of the forming plate and the horizontal driving mechanism of the forming plate respectively, and move the forming plate to the target forming process position in the accommodating cavity; Feeding and forming step: Feed the target quartz sand into the accommodating cavity through the quartz sand feeding pipe, and scrape and shape the target quartz sand through the relative movement between the forming plate and the inner wall of the melting mold body to form a target quartz sand layer, and the thickness of the target quartz sand layer is the spacing between the target forming process position and the inner wall of the melting mold body; And The above-mentioned forming plate moving step and the feeding and forming step are executed cyclically to form at least two layers of quartz sand layers with sequentially increasing quartz sand purity along the inner side surface of the melting die body towards the axis of the melting die body.

10. The automatic forming method of the quartz crucible according to claim 9, characterized in that, When the feeding structure includes a fixing frame, a feeding device vertical driving mechanism and a feeding device horizontal driving mechanism arranged on the fixing frame, and at least two groups of feeding mechanisms, each group of the feeding mechanisms includes the quartz sand feeder, the quartz sand feeding pipe and the gas purging pipe, the purity of the quartz sand contained in different quartz sand feeders is different, a material cut-off valve is arranged between each quartz sand feeder and the corresponding quartz sand feeding pipe, and each group of the feeding mechanisms further includes a weighing sensor, and all the feeding mechanisms can work in a time-sharing manner. At this time, the feeding and forming step further includes the following steps: Controlling the opening of the corresponding material cut-off valve according to the feeding control signal, and continuously feeding the corresponding target weight of the quartz sand contained in the corresponding quartz sand feeder into the accommodating cavity through the quartz sand feeding pipe under the gas purging of the corresponding gas purging pipe for forming; and When the weight of the fed quartz sand sensed by the weighing sensor reaches the target weight, controlling the closing of the corresponding material cut-off valve.

Images