Quartz crucible melting mold

Abstract

The utility model relates to the technical field of quartz crucible production, in particular to a quartz crucible founding mold which comprises a water-cooled jacket and a mold body, and a vertically extending columnar space is formed in the water-cooled jacket; the mold body is supported in the columnar space, the edge of the upper part of the mold body is provided with a flange part extending horizontally, and a plurality of upper air holes are formed in the flange part corresponding to an upper opening of the quartz crucible; wherein a negative pressure cavity is formed between the inner wall of the water-cooled jacket and the outer wall of the mold body, and the upper air hole forms an air inlet of the negative pressure cavity. The mold has the beneficial effects that by adding the upper air hole, the air permeability of the upper opening position of the quartz crucible is effectively improved, and timely discharge of gas generated in the melting process is facilitated; the melting speed of the quartz material is also increased, the upper opening melting time and the energy consumption can be reduced, and the production cost is saved; the scheme is simple in structure, easy to manufacture and maintain and capable of remarkably improving the problem of bubbles at the upper opening of the quartz crucible.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of quartz crucible production, especially to a quartz crucible melting mold. BACKGROUND

[0002] In the quartz crucible manufacturing process, the gas generated during high-temperature melting is easy to gather on the upper part of the crucible to form bubbles, which further causes the formation of relatively concentrated or large number of bubbles in the transparent layer of the upper part of the finished product, and the bubbles cannot be removed by subsequent processing methods. Since the bubbles in the transparent layer of the upper part of the quartz crucible have a certain impact on the single yield and crystal formation rate during the crystal pulling process, both the crucible manufacturer and the crystal pulling factory are always focused on the problem of bubbles in the upper part of the crucible.

[0003] In the prior art, the generation of bubbles is mainly reduced by optimizing the melting process parameters, but the effect is limited. Or increase the cutting height of the upper part of the quartz crucible to cut off the bubble-rich transparent layer of the upper part, which causes a lot of waste of manpower and material resources. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a quartz crucible melting mold, which solves the technical problems that the effect of reducing bubble generation by optimizing the melting process parameters in the prior art is limited, and the cutting height of the upper part of the quartz crucible is increased to cut off the bubble-rich transparent layer of the upper part, which causes a lot of waste of manpower and material resources.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned purposes, the utility model adopts the main technical scheme comprising:

[0008] Firstly, the utility model provides a quartz crucible melting mold, which is suitable for manufacturing a quartz crucible, comprising a water cooling jacket and a mold body, the water cooling jacket forms a vertically extending columnar space inside; the mold body is supported in the columnar space, the upper edge of the mold body has a horizontally extending flange part, and a plurality of upper air holes are formed on the flange part corresponding to the upper part position of the quartz crucible; wherein, the inner wall of the water cooling jacket and the outer wall of the mold body form a negative pressure cavity, and the upper air holes are communicated with the negative pressure cavity.

[0009] (III) Beneficial effects

[0010] The quartz crucible melting mold has the advantages that the upper air vent is corresponding to the upper opening position of the quartz crucible, the air permeability of the upper opening position of the quartz crucible is effectively improved by adding the upper air vent, the gas generated in the melting process is discharged in time, the melting speed of the quartz material is improved, the melting time and energy consumption of the upper opening are reduced, the production cost is saved, the structure is simple, the quartz crucible upper opening bubble problem can be improved obviously, and the quartz crucible melting mold is easy to manufacture and maintain.

[0011] Through actual application, the quartz crucible upper opening bubble density prepared by the mold body is reduced from 4-6 per square millimeter to 0-2 per square millimeter, and the product quality is obviously improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 Fig. 1 is a structural schematic view of a quartz crucible melting mold in an embodiment of the utility model;

[0013] Figure 2 Fig. 2 is a partial enlarged structural schematic view of X in the utility model; Figure 1

[0014] Figure 3 Fig. 3 is a structural schematic view of a quartz crucible melting mold in another embodiment of the utility model;

[0015] Figure 4 Fig. 4 is a structural schematic view of a quartz crucible melting mold in still another embodiment of the utility model;

[0016] Figure 5 Fig. 5 is a structural schematic view of a quartz crucible melting mold in still another embodiment of the utility model;

[0017] Figure 6 Fig. 6 is a structural schematic view of a vacuum distributor of the utility model;

[0018] Figure 7 Fig. 7 is a partial enlarged structural schematic view of Z in the utility model. Figure 5

[0019]

Explanation of reference signs

[0020] 1, water cooling jacket;

[0021] 2, mold body; 200, flange part; A, upper air vent; C, gas passage; D, positioning ring groove;

[0022] 100, negative pressure cavity; 101, upper chamber; 102, lower chamber;

[0023] 3, sealing assembly; 31, sealing gasket; 32, plug; ​​

[0024] 4. The partition assembly;

[0025] 5. The rotating shaft;

[0026] 6. The vacuum distributor; 61. The shell; 62. The inner sealing ring; 63. The outer sealing ring; 64. The connecting seat; 65. The spring; 66. The sliding part; 67. The sliding sealing ring. DETAILED DESCRIPTION

[0027] In order to better explain the utility model, so as to facilitate understanding, the following combining with the attached Figures 1-7 , through specific implementation, the utility model is described in detail. Wherein, the "upper", "lower" and other orientation terms mentioned in this paper are with the orientation of the drawing as reference. Figure 1

[0028] Example 1:

[0029] Referring to Figures 1-7 , the embodiment of the utility model provides a quartz crucible melting mold, is suitable for manufacturing quartz crucible, including water cooling jacket 1 and mold body 2, the inside of water cooling jacket 1 forms the columnar space of vertical extension;Mold body 2 is supported in the columnar space, the upper edge of mold body 2 has the flange portion 200 of horizontal extension, and a plurality of upper air holes A are set up on the flange portion 200 corresponding to the upper opening position of quartz crucible;Wherein, the inner wall of water cooling jacket 1 and the outer wall of mold body 2 form negative pressure cavity 100, and the upper air hole A forms the air inlet of negative pressure cavity 100.

[0030] In the embodiment, since the upper air hole A is corresponding to the upper opening position of the quartz crucible, therefore, by increasing the upper air hole A, the gas permeability of the upper opening position of the quartz crucible is effectively improved, which is beneficial to promote the gas generated in the melting process to be discharged in time;Since the gas permeability of the upper opening position of the quartz crucible is improved, therefore, the melting speed of the quartz material is also improved, the upper melting time and energy consumption can be reduced, and the production cost can be saved;The scheme has simple structure, easy to manufacture and maintain, and can significantly improve the bubble problem of the upper opening of the quartz crucible.

[0031] Through practical application, the bubble density of the upper opening of the quartz crucible prepared by the mold body 2 is reduced from 4-6 per square millimeter to 0-2 per square millimeter, which significantly improves the product quality.

[0032] The upper air hole A is distributed along the circumference of the mold body 2, and is distributed along the axis of the mold body 2 in multiple layers;Further comprising a plurality of first filter plugs, the first filter plug is one-to-one corresponding to each upper air hole A.

[0033] ​The upper air vents A are evenly distributed along the circumference of the mold body 2, ensuring that the gas can be discharged in all directions and uniformly. At the same time, the air vents are designed in a multi-layer structure along the axial direction of the mold body 2, which further enhances the gas discharge efficiency and effectively avoids the accumulation of gas inside the mold body 2. The first filter plug not only effectively blocks the quartz sand from entering the upper air vent A and prevents it from entering the negative pressure cavity 100, affecting the normal operation of the mold body 2, but also allows the gas to be divided by the filter screen of the first filter plug when flowing through the upper air vent A, thereby improving the uniformity and stability of gas flow and further improving the discharge efficiency of bubbles at the upper position of the quartz crucible.

[0034] Specifically, the first filter plug includes a plurality of filter layers connected to the upper air vent A by interference fit.

[0035] The mold body 2 also has a lower air vent corresponding to the position below the upper air vent A on the inner wall of the quartz crucible; the device also includes a second filter plug corresponding to the lower air vent. This further enhances the overall air permeability of the mold body 2, which helps to discharge gas in all directions during the melting process, thereby more effectively reducing bubble formation.

[0036] Similar to the upper air vent A, the second filter plug is also provided one-to-one in the lower air vent. These second filter plugs have the same structure and function as the first filter plug and will not be described in detail here.

[0037] The diameter of the upper air vent A is 3-10mm, and the lateral spacing is 15-50mm; the upper air vent A is distributed in 1-5 rows along the axial direction of the mold body 2.

[0038] Controlling the diameter of the upper air vent A within the range of 3 to 10 mm is based on the comprehensive consideration of the flow characteristics of the gas during the melting process and the structure of the mold body 2, aiming to ensure that the gas can be efficiently and smoothly discharged through the air vent, while avoiding the adverse effects of the air vent being too large on the structural stability of the mold body 2.

[0039] In addition, the lateral spacing of the upper air vent A on the surface of the mold body 2 is also planned to be between 15 and 50 millimeters. This spacing is chosen to maintain a reasonable distribution between the air vents to ensure that the gas inside the mold body 2 can be uniformly and fully discharged, avoiding the accumulation of gas in local areas and thus affecting the melting effect.

[0040] In the axial direction of the mold body 2, the upper vent hole A is designed as 1 to 5 rows of layout. The design of such multi-row vent holes can more effectively guide the gas to be discharged from the inside of the mold body 2, especially during the melting process, as the temperature rises and gas is generated, the multi-row vent holes can provide a smoother exhaust passage, significantly reduce the residence time of the gas inside the mold body 2, and thus improve the melting efficiency and product quality.

[0041] Embodiment 2:

[0042] With reference to Figure 1 , Figure 2 and Figure 5 , the embodiments of the utility model further have the following technical solutions in addition to all the technical solutions of the above-mentioned embodiments:

[0043] The flange part 200 is vertically provided with a gas passage C corresponding to the position of the upper vent hole A and communicating with the negative pressure cavity 100, and the upper vent hole A extends radially and communicates with the gas passage C. A plurality of vertically distributed upper vent holes A corresponding to the position of the gas passage C are in communication with the gas passage C. The quartz crucible melting mold further comprises a sealing assembly 3 fixedly connected to the upper end of the gas passage C.

[0044] The sealing assembly 3 comprises a sealing gasket 31 and a plug 32, and the gas passage C comprises a sealing section and a communication section which are in communication with each other and are distributed from top to bottom. The communication section communicates with the upper vent hole A, the plug 32 is detachably fixedly connected in the sealing section, and the sealing gasket 31 is pressed against the bottom surface of the sealing section by the plug 32.

[0045] In this embodiment, the gas passage C provides a smooth discharge path for the gas generated during the melting process. The upper vent hole A extends radially and communicates with the corresponding position of the vertically distributed gas passage C. Such design ensures that the gas can be efficiently discharged from the inside of the mold body 2.

[0046] The design of the sealing assembly 3 not only ensures the airtightness of the mold body 2 during the melting process, but also prevents the entry of external air or impurities. At the same time, since the upper vent hole A is in communication with the outside world and extends in a regular vertical direction, it is beneficial to improve the maintenance convenience of the upper vent hole A.

[0047] Embodiment 3:

[0048] With reference to Figure 3 , the embodiments of the utility model further have the following technical solutions in addition to all the technical solutions of the above-mentioned embodiments:

[0049] The upper vent hole A is obliquely arranged in the flange part 200, one end of the upper vent hole A close to the axis of the mold body 2 is the first end, and the other end of the upper vent hole A away from the axis of the mold body 2 is the second end, the first end is higher than the second end, and the second end is communicated with the negative pressure cavity 100; the angle between the axis of the upper vent hole A and the horizontal direction is 30-40 degrees.

[0050] In the embodiment, the upper vent hole A adopts an inclined layout, and the inclined upper vent hole A is designed to help guide the gas to be discharged more smoothly from the inside of the mold body 2, avoiding the accumulation and retention of the gas in the mold body 2.

[0051] At the same time, since the upper vent hole A is not completely horizontal, the quartz sand generates a radial force directed to the mold body 2 under the action of the centrifugal force, and since the direction of the centrifugal force is not parallel to the extension direction of the upper vent hole A, the quartz sand particles are more difficult to enter the inside of the upper vent hole A, thereby improving the cleanliness and smoothness of the upper vent hole A and reducing the maintenance frequency of the first filter plug.

[0052] By limiting the angle of the upper vent hole A to 30-40 degrees, the exhaust smoothness can be further improved, the cleanliness and smoothness of the upper vent hole A can be further improved, and the maintenance frequency of the first filter plug can be reduced.

[0053] Embodiment 4:

[0054] With reference to Figure 4 The embodiments of the utility model further have the following technical solutions in addition to all the technical solutions of the above-mentioned embodiments.

[0055] The lower surface of the flange part 200 is provided with an upwardly extending accommodation ring groove D, and the upper vent hole A is horizontally arranged in the flange part 200 and communicated with the accommodation ring groove D, so as to ensure that the gas can be discharged more smoothly from the inside of the mold body 2 through the upper vent hole A during the melting process, and at the same time, the accumulation of the gas in the mold body 2 is avoided. The existence of the accommodation ring groove D provides additional space for the upper vent hole A, so that the design of the upper vent hole A is more flexible and diverse, and can better adapt to different melting requirements and the structure of the mold body 2. The accommodation ring groove is the top wall of the negative pressure cavity 100.

[0056] In addition, the design of the accommodation ring groove D also helps to improve the strength and stability of the mold body 2. During the melting process, the mold body 2 will be subjected to high temperature and high pressure, and the accommodation ring groove D can effectively disperse these stresses, reducing the deformation and damage risk of the mold body 2.

[0057] Embodiment 5:

[0058] With reference to Figures 5-7The embodiment of the utility model further has the following technical solutions in addition to all the technical solutions of the above embodiment.

[0059] The negative pressure cavity 100 comprises an upper chamber 101 and a lower chamber 102 separated by the separation assembly 4, the upper chamber 101 is communicated with the upper air hole A, the lower chamber 102 is communicated with the lower air hole, and the upper chamber 101 and the lower chamber 102 are correspondingly connected with the first negative pressure device and the second negative pressure device.

[0060] The separation assembly 4 comprises a first sealing ring fixedly connected to the inner wall of the water cooling jacket 1, a second sealing ring fixedly connected to the outer wall of the mold body 2, and a sealing ring located between the first sealing ring and the second sealing ring.

[0061] In the embodiment, the negative pressure cavity 100 is separated into the upper chamber 101 and the lower chamber 102 by the separation assembly 4, specifically, the upper chamber 101 is communicated with the upper air hole A and is responsible for guiding the gas generated in the upper part of the mold body 2 to be discharged, while the lower chamber 102 is communicated with the middle air hole and the lower air hole and is responsible for processing the gas generated in the lower part of the mold body 2. The separation design ensures that the gas can be smoothly discharged according to the predetermined path, provides a hardware basis for the flexible working mode of the upper air hole A and the lower air hole with different negative pressure values and different negative pressure opportunities, greatly improves the use flexibility of the quartz crucible melting mold, and further helps to improve the overall quality and production efficiency of the quartz crucible produced by the quartz crucible melting mold.

[0062] The separation assembly 4 forms a tight separation interface. Meanwhile, the sealing ring is arranged between the first sealing ring and the second sealing ring, further enhancing the sealing performance of the separation.

[0063] Specifically, the water cooling jacket 1 extends the rotating shaft 5; the quartz crucible melting mold further comprises a vacuum distributor 6, the vacuum distributor 6 comprises a shell 61, the shell 61 is arranged on the rack, the rotating shaft 5 penetrates the shell 61, two independent air chambers are formed between the shell 61 and the rotating shaft 5, the air chambers are correspondingly communicated with the first negative pressure device and the second negative pressure device, and the upper chamber 101 and the lower chamber 102 are correspondingly communicated with the two air chambers. Specifically, two gas channels can be arranged inside, one end of the two gas channels is correspondingly connected with the upper chamber 101 and the lower chamber 102 respectively, and the other end of the two gas channels is correspondingly connected with the two air chambers respectively.

[0064] The vacuum distributor 6 further comprises three sets of inner sealing rings 62 and outer sealing rings 63, the inner sealing rings 62 are directly or indirectly connected to the rotating shaft 5, the outer sealing rings 63 are directly or indirectly connected to the shell 61, and the contact surfaces of the inner sealing rings 62 and the outer sealing rings 63 abut against each other. The contact surfaces of the inner sealing rings 62 and the outer sealing rings 63 are arranged as tapered surfaces; the vacuum distributor 6 further comprises a connecting seat 64 and a spring 65, the connecting seat 64 is provided with a mounting groove, the spring 65 is arranged in the mounting groove, and the connecting seat 64 is connected to the inner wall of the shell 61; the outer sealing ring 63 extends out a sliding part 66, the sliding part 66 is slidingly arranged in the mounting groove and extrudes the spring 65, so that the spring 65 applies an elastic force to the sliding part 66, and then applies an acting force to the outer sealing ring 63, so that the contact surfaces of the outer sealing ring 63 and the inner sealing ring 62 abut against each other.

[0065] The vacuum distributor 6 further comprises a sliding sealing ring 67 arranged between the sliding part 66 and the mounting groove, so as to establish sliding sealing between the sliding part 66 and the mounting groove.

[0066] It can be understood that, except for the parts in conflict, the above-mentioned embodiments 1-5 can be freely combined to form other embodiments of the present application.

[0067] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0068] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0069] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0070] The term "comprising" or any other similar word is intended to encompass non-exclusive inclusion, so that a process, article or device / apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, article or device / apparatus.

[0071] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the present application, and the technical schemes after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A quartz crucible melting mold characterized by comprising: include: Water-cooled jacket (1) forms a vertically extending columnar space inside; The mold body (2) is supported in the columnar space. The upper edge of the mold body (2) has a horizontally extending flange (200). The flange (200) has several upper vent holes (A) corresponding to the upper opening of the quartz crucible. A negative pressure cavity (100) is formed between the inner wall of the water cooling jacket (1) and the outer wall of the mold body (2), and the upper vent hole (A) is connected to the negative pressure cavity (100).

2. The quartz crucible melt mold according to claim 1, wherein The upper vent holes (A) are distributed in multiple circumferential directions along the mold body (2) and in multiple axial directions along the mold body (2).

3. The quartz crucible melt mold according to claim 2, wherein The flange (200) is vertically provided with a gas channel (C) that communicates with both the upper vent (A) and the negative pressure chamber (100). The upper vent (A) extends radially, and multiple vertically distributed upper vents (A) corresponding to the positions of the gas channel (C) are all connected to the gas channel (C). It also includes a sealing assembly (3) that is fixedly connected to the upper end of the gas passage (C); The sealing assembly (3) includes a sealing gasket (31) and a plug (32). The gas channel (C) includes a sealing section and a connecting section that are interconnected and distributed from top to bottom. The connecting section is connected to the upper vent (A). The plug (32) is detachably and fixedly connected inside the sealing section. The sealing gasket (31) is pressed against the bottom surface of the sealing section by the plug (32).

4. The quartz crucible melt mold according to claim 2, wherein The upper vent (A) is obliquely opened in the flange (200). The end of the upper vent (A) close to the axis of the mold body (2) is the first end, and the end of the upper vent (A) away from the axis of the mold body (2) is the second end. The second end is connected to the negative pressure chamber (100), and the first end is higher than the second end. The angle between the axis of the upper vent (A) and the horizontal direction is 30°-40°.

5. The quartz crucible melt mold according to claim 2, wherein The lower surface of the flange (200) is provided with an upwardly extending relief ring groove (D), and the upper vent hole (A) is horizontally opened in the flange (200) and communicates with the relief ring groove (D). The relief ring groove is the top wall of the negative pressure chamber (100).

6. The quartz crucible melt mold according to any one of claims 2 to 5, wherein The diameter of the upper vent (A) is 3-10mm, and the lateral spacing is 15-50mm; The upper ventilation holes (A) are distributed in 1-5 rows along the axial direction of the mold body (2).

7. The quartz crucible melt mold according to claim 6, wherein The mold body (2) is also provided with a number of lower ventilation holes, which are distributed on the inner wall of the quartz crucible below the upper ventilation holes (A); It also includes a second filter plug that is disposed in a corresponding manner within the lower vent hole.

8. The quartz crucible melt mold according to claim 7, wherein The negative pressure cavity (100) comprises an upper cavity (101) and a lower cavity (102) separated by the separation assembly (4), the upper cavity (101) is communicated with the upper air vent (A), the lower cavity (102) is communicated with the lower air vent, and the upper cavity (101) and the lower cavity (102) are both correspondingly connected with the first negative pressure device and the second negative pressure device.

9. The quartz crucible melt mold according to claim 8, wherein The separation assembly (4) comprises a first sealing ring fixedly connected to the inner wall of the water cooling jacket (1), a second sealing ring fixedly connected to the outer wall of the mold body (2), and a sealing ring located between the first sealing ring and the second sealing ring.

10. The quartz crucible melt mold according to claim 2, wherein A plurality of first filter plugs are further included, and each of the first filter plugs is detachably arranged in each of the upper air vents (A).

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