Mold pressing and shaping tool for crucible support prefabricated body

Abstract

The utility model relates to a mould pressing and shaping tool for a crucible support prefabricated body. The mould pressing and shaping tool comprises a supporting plate and a connecting assembly. A plurality of supporting plates are arranged; a plurality of connecting assemblies are arranged, each connecting assembly comprises a supporting piece, and one supporting piece is arranged between every two adjacent supporting plates, so that a placing area is formed between every two adjacent supporting plates. The device has the effects of reducing pits of the crucible support prefabricated body and improving the product percent of pass.

Description

Technical Field

[0001] This application relates to the field of carbon-carbon composite material production technology, and in particular to a tooling for molding and shaping a crucible preform. Background Technology

[0002] Currently, in the production of monocrystalline silicon, using a single-crystal furnace to achieve high-temperature crystal growth is a key technology. To ensure crystal quality, the growth environment must be precisely controlled, and the design of the crucible directly affects the uniformity and stability of the temperature field. Existing crucibles are typically made of graphite, which is widely used due to its good thermal conductivity and mechanical strength. However, with the growth of market demand and technological advancements, the demand for higher purity and larger size monocrystalline silicon is increasing, placing higher demands on crucibles. Carbon-carbon composite materials offer advantages such as high strength, light weight, low coefficient of thermal expansion, good thermal shock resistance, no cracking in rapid heating and cooling environments, and long service life.

[0003] Under relevant technologies, the conventional crucible holder manufacturing process involves using plain-weave carbon cloth with a surface density of 300-400 g / m² and mesh fabric with a surface density of 50-120 g / m² as raw materials. These materials are then layered and needle-punched according to a set layup process to form the crucible holder preform. The preform is then hardened at a temperature of 200-280℃ for 3-6 hours. In conventional techniques, multiple crucible holder preforms are typically stacked vertically at the bottom of the furnace during hardening.

[0004] Regarding the aforementioned technologies, due to the special size and layup characteristics of crucible tray products, when stacked, the weight of multiple crucible tray preforms easily causes pits and indentations on their inner and outer surfaces, affecting the inspection pass rate of the preform blanks and resulting in insufficient local dimensional processing and pit / pock defects during subsequent product processing. Therefore, there is an urgent need for a tooling that can reduce pitting in crucible tray preforms and improve product pass rate. Utility Model Content

[0005] In order to reduce the pits in the preformed crucible holder and improve the product qualification rate, this application provides a molding and shaping tooling for the preformed crucible holder.

[0006] This application provides a molding and shaping fixture for a preformed crucible support, which adopts the following technical solution:

[0007] A molding and shaping fixture for a preformed crucible support includes a support plate and a connecting assembly;

[0008] The support plate is provided with multiple components;

[0009] The connecting components are provided in multiple ways, and each connecting component includes a support member. A support member is provided between each pair of adjacent support plates so that a placement area is formed between the two adjacent support plates.

[0010] By adopting the above technical solution, when multiple crucible support preforms need to be hardened, due to the special size and layup of the crucible support preforms, they are prone to pits on the inner and outer surfaces and minor internal defects, which affect the inspection pass rate of the preform blanks. To address this, by setting multiple support plates and connecting components, the crucible support preforms are placed in the placement area, and support members are provided between two adjacent support plates to support the support plates, thereby improving the stability of stacking multiple support plates. By setting multiple support plates, the pits in the crucible support preforms can be further reduced and the product pass rate can be improved.

[0011] Optionally, the connecting assembly further includes a fixing rod, an upper locking nut, and a lower locking nut. Multiple fixing rods are provided, passing through the support plate and the support member. When multiple support plates are stacked, the upper locking nut is located on the top wall of the uppermost support plate and is threaded to the fixing rod. The lower locking nut is located on the bottom wall of the lowermost support plate and is threaded to the fixing rod. Each placement area also includes an auxiliary locking nut, which is threaded to the fixing rod and located between one of the support plates and the support member.

[0012] By adopting the above technical solution, in order to fix two adjacent support plates, a fixing rod, an upper locking nut, and a lower locking nut are set. The fixing rod passes through the support plate and the support member, and the upper locking nut and the lower locking nut lock and fix the fixing rod and the support plate.

[0013] Optionally, each of the support plates has multiple air holes extending through its surface.

[0014] By adopting the above technical solution, in order to reduce the occurrence of bulging in the crucible holder preform during baking or molding, multiple air holes are provided through the surface of the support plate to allow impurity gases generated during the baking process to be discharged, thereby reducing bulging and improving the product qualification rate.

[0015] Optionally, a limiting groove is provided on the side of the support plate near the placement area.

[0016] By adopting the above technical solution, when the precast crucible is located in the placement area, and the precast crucible undergoes significant internal and external deformation due to the release of thermal stress after baking, the limiting groove can limit the precast crucible.

[0017] Optionally, the support member is a telescopic structure.

[0018] By adopting the above technical solution, in order to enable the support plate to support precast crucibles of different sizes, the support component is a telescopic structure so that the placement area can support precast crucibles of different heights.

[0019] Optionally, the support member includes a first support portion and a second support portion, one end of the first support portion is fitted with a support plate, and the end of the second support portion away from the first support portion is fitted with the auxiliary locking nut, and the ends of the first support portion and the second support portion that are close to each other are slidably connected.

[0020] By adopting the above technical solution, one end of the locking member passes through the side wall of the first support part and abuts against the outer wall of the second support part. The locking member is threadedly connected to the first support part. By sliding the first support part, the height of the placement area can be changed so that the placement area can support the precast crucibles of different heights.

[0021] Optionally, the system further includes a buffer assembly comprising an elastic element disposed between the support member and a support plate, the elastic element having a force that drives the support plate and the support member to separate under recoverable deformation.

[0022] By adopting the above technical solution, when two adjacent support plates are stacked, the upper support plate will exert instantaneous gravitational pressure on the precast crucible in the placement area when it presses on the support member. Therefore, by setting a buffer component, when the upper support plate presses on the support member, the instantaneous pressure of the upper support plate on the precast crucible can be reduced under the action of the elastic member.

[0023] Optionally, one end of the support member is provided with a receiving groove, and one end of the elastic member is fixedly connected to the groove wall of the receiving groove. The receiving groove is used to allow the elastic member to fully extend into the groove in the deformed state.

[0024] By adopting the above technical solution, when the upper support plate is pressed onto the support member, the elastic member is compressed into the receiving groove so that the support member supports the support plate, thereby improving the stability of the support plate.

[0025] Optionally, the buffer assembly further includes a pressure block, which is fixedly connected to the end of the elastic member away from the receiving groove. Under normal conditions, the pressure block is located outside the receiving groove, and when two adjacent support plates are stacked, the pressure block is located inside the receiving groove.

[0026] By adopting the above technical solution, in order to reduce the direct contact between the elastic element and the support plate, which would cause wear on the support plate, a pressure block is set up so that the pressure block contacts the support plate, thereby reducing wear on the support plate and improving its service life.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. This application sets up multiple support plates and connecting components, and the crucible tray preform is placed in the placement area. There are support members between two adjacent support plates, and the support members support the support plates, which improves the stability of stacking multiple support plates. By setting up multiple support plates, the pitting of the crucible tray preform can be further reduced and the product qualification rate can be improved.

[0029] 2. This application improves the product qualification rate by setting up a buffer component, which uses pressure blocks and elastic elements to reduce the weight pressure of the upper support plate on the lower crucible preform.

[0030] 3. This application uses a telescopic support structure to support precast crucible bodies of different sizes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the crucible support prefabricated body of this application;

[0032] Figure 2 This is a schematic diagram of the structure of the connecting component of this application;

[0033] Figure 3 This is a schematic diagram of the support plate of this application;

[0034] Figure 4 This is a structural schematic diagram of the support component of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the buffer component in this application;

[0036] Figure 6 This application Figure 5 Enlarged view of part A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 01, precast crucible support; 1, support plate; 11, placement area; 12, groove; 13, vent; 14, limiting groove; 2, connecting assembly; 21, support member; 211, first support part; 212, second support part; 213, locking member; 214, receiving groove; 22, fixing rod; 23, upper locking nut; 24, lower locking nut; 25, auxiliary locking nut; 3, buffer assembly; 31, elastic member; 32, pressure block. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] Example 1:

[0040] This application discloses a molding and shaping fixture for a precast crucible support. (Refer to...) Figure 1 and Figure 2 The crucible support preform molding and shaping fixture includes a support plate 1 and a connecting assembly 2. Multiple support plates 1 and multiple connecting assemblies 2 are provided. The connecting assembly 2 includes a support member 21. A support member 21 is provided between each two adjacent support plates 1 so that a placement area 11 is formed between the two adjacent support plates 1. The support member 21 separates the two support plates 1. During operation, the crucible support preform 01 is placed in the placement area 11 formed by the two support plates 1. In this embodiment, the support member 21 is a rod-shaped structure with a circular cross-section.

[0041] Reference Figure 1 In this embodiment, the support plate 1 is a horizontally placed plate structure. Since the shape of the crucible support preform product is that the bottom is convex, in order to better support the crucible support preform 01, a groove 12 is provided on one side of the support plate 1. Similarly, since the other side of the crucible support preform 01 is arc-shaped, in order to adapt the support plate 1 to the shape of the crucible support preform 01, the other side of the support plate 1 is arc-shaped. When the crucible support preform 01 is located in the placement area 11, the groove 12 supports the convex part of the crucible support preform 01. The arc-shaped side of the other support plate 1 is set close to the placement area 11, thereby improving the stability of the crucible support preform 01 in the placement area 11.

[0042] Reference Figure 2 To fix two adjacent support plates 1, the connecting assembly 2 also includes a fixing rod 22, an upper locking nut 23, and a lower locking nut 24. Multiple fixing rods 22 are provided, arranged along the stacking direction of the crucible support preform 01. The fixing rods 22 pass through the support plates 1 and the support members 21, and are threaded to the support plates 1. The support members 21 are threaded to the fixing rods 22. When multiple support plates 1 are stacked, the upper locking nut 23 is located on the top wall of the uppermost support plate 1 and is threaded to the fixing rod 22. The lower locking nut 24 is located on the bottom wall of the lowermost support plate 1 and is threaded to the fixing rod 22. Each placement area 11 also has an auxiliary locking nut 25, which is threaded to... The fixed rod 22 is fixed, and the auxiliary locking nut 25 is located between a support plate 1 and a support member 21. That is, one side of the support member 21 abuts against the auxiliary locking nut 25, and the other end abuts against the surface of the support plate 1. During operation, first place a precast crucible holder 01 on the support plate 1, install the fixed rod 22, the lower locking nut 24 and the auxiliary locking nut 25, then thread the support member 21 onto the fixed rod 22, then place another support plate 1 on the support member 21, and then thread another fixed rod 22 through the upper support plate 1 and onto the support member 21, and then fix it with the auxiliary locking nut 25. Repeat the above steps to stack them, and finally install the upper locking nut 23 on the uppermost fixed rod 22 to achieve the connection and fixation of multiple support plates 1 and support members 21.

[0043] Reference Figure 3 In order to reduce the occurrence of bulging of the crucible preform 01 during baking or molding, the support plate 1 has multiple air holes 13 through it to discharge impurity gases during the baking process of the crucible preform 01, thereby reducing the occurrence of bulging of the crucible preform 01 and improving the product qualification rate.

[0044] Reference Figure 2 When the crucible support preform 01 is located in the placement area 11, in order to improve the stability of the crucible support preform 01 and reduce the movement during the reaction, a limiting groove 14 is opened on the arc-shaped side of the support plate 1. The crucible support preform 01 is located in the limiting groove 14. After baking, when the internal and external deformation of the crucible support preform 01 is large due to the release of thermal stress, the limiting groove 14 can limit the crucible support preform 01.

[0045] Example 2:

[0046] Reference Figure 4 In order to enable the support plate 1 to support precast crucibles 01 of different sizes, the support member 21 is a telescopic structure. Specifically, the support member 21 includes a first support part 211 and a second support part 212. One end of the first support part 211 is attached to a support plate 1, and the end of the second support part 212 away from the first support part 211 is attached to an auxiliary locking nut 25. The ends of the first support part 211 and the second support part 212 that are close to each other are slidably connected. The first support part 211 and the second support part 212 are fixed together by a locking member 213. Specifically, one end of the locking member 213 passes through the side wall of the first support part 211 and abuts against the outer wall of the second support part 212. The locking member 213 is threaded to the first support part 211. By sliding the first support part 211, the height of the placement area 11 can be changed so that the placement area 11 can support precast crucibles 01 of different heights.

[0047] Example 3:

[0048] Reference Figure 5 and Figure 6 When two adjacent support plates 1 are stacked, the upper support plate 1 pressing on the support member 21 will generate instantaneous gravitational pressure on the crucible tray preform 01 in the placement area 11. For this reason, the molding and shaping tooling for the crucible tray preform 01 also includes a buffer assembly 3. The buffer assembly 3 includes an elastic element 31, which is disposed between the support member 21 and a support plate 1. Under recoverable deformation, the elastic element 31 has a force that drives the support plate 1 and the support member 21 to separate. In this embodiment, the elastic element 31 is a compression spring. By setting the elastic element 31, when the upper support plate 1 presses on the support member 21, the instantaneous pressure of the upper support plate 1 on the crucible tray preform 01 can be reduced under the action of the elastic element 31.

[0049] Reference Figure 6 To further improve the stability of the support plate 1 placed on the support block, the buffer assembly 3 also includes a pressure block 32. One end of the support member 21 is provided with a receiving groove 214, and one end of the elastic member 31 is fixedly connected to the groove wall of the receiving groove 214. The receiving groove 214 is used to allow the elastic member 31 to fully extend into the groove in the deformed state. The pressure block 32 is fixedly connected to the end of the elastic member 31 away from the receiving groove 214. Under normal conditions, the pressure block 32 is located outside the receiving groove 214. When two adjacent support plates 1 are stacked, the pressure block 32 is located inside the receiving groove 214. In this embodiment, the pressure block 32 is annular, and multiple elastic members 31 are spaced apart along the circumference of the pressure block 32. When the upper support plate 1 is pressed onto the support member 21, the elastic member 31 is compressed, and the pressure block 32 is further compressed into the receiving groove 214. The support member 21 still supports the support plate 1, thereby improving the stability of the support plate 1.

[0050] The implementation principle of the crucible support preform molding and shaping tooling in this application embodiment is as follows: During operation, a crucible support preform 01 is first placed on the support plate 1, and a support member 21 is placed on the support plate 1. Then, another support plate 1 is placed on the support member 21, and the two support plates 1 are fixed by the upper locking nut 23 and the lower locking nut 24.

[0051] When the height of the placement area 11 needs to be adjusted, the height of the placement area 11 can be changed by sliding the first support part 211, and the first support part 211 and the second support part 212 can be fixed by the locking part 213.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tooling for molding and shaping a precast crucible support, characterized in that: It includes a support plate (1) and a connecting assembly (2); The support plate (1) is provided with multiple parts; The connecting component (2) is provided in multiple ways. The connecting component (2) includes a support member (21). A support member (21) is provided between each two adjacent support plates (1) so that a placement area (11) is formed between the two adjacent support plates (1).

2. The molding and shaping fixture for a preformed crucible holder according to claim 1, characterized in that: The connecting assembly (2) further includes a fixing rod (22), an upper locking nut (23), and a lower locking nut (24). There are multiple fixing rods (22), which pass through the support plate (1) and the support member (21). When multiple support plates (1) are stacked, the upper locking nut (23) is located on the top wall of the uppermost support plate (1) and is threaded to the fixing rod (22). The lower locking nut (24) is located on the bottom wall of the lowermost support plate (1) and is threaded to the fixing rod (22). Each placement area (11) is also provided with an auxiliary locking nut (25), which is threaded to the fixing rod (22) and is located between one of the support plates (1) and the support member (21).

3. The molding and shaping fixture for a preformed crucible holder according to claim 1, characterized in that: Each of the support plates (1) has multiple air holes (13) through its surface.

4. The molding and shaping fixture for a preformed crucible support according to claim 1, characterized in that: The support plate (1) has a limiting groove (14) on the side near the placement area (11).

5. The molding and shaping fixture for a preformed crucible support according to claim 2, characterized in that: The support member (21) is a telescopic structure.

6. The molding and shaping fixture for a preformed crucible holder according to claim 5, characterized in that: The support member (21) includes a first support part (211) and a second support part (212). One end of the first support part (211) is attached to a support plate (1), and the end of the second support part (212) away from the first support part (211) is attached to the auxiliary locking nut (25). The ends of the first support part (211) and the second support part (212) that are close to each other are slidably connected.

7. The molding and shaping fixture for a preformed crucible support according to claim 1, characterized in that: It also includes a buffer assembly (3), which includes an elastic element (31) disposed between the support member (21) and a support plate (1), and the elastic element (31) has a force that drives the support plate (1) and the support member (21) to separate under recoverable deformation.

8. The molding and shaping fixture for a preformed crucible support according to claim 7, characterized in that: The support member (21) has a receiving groove (214) at one end, and the elastic member (31) is fixedly connected to the groove wall of the receiving groove (214) at one end. The receiving groove (214) is used to allow the elastic member (31) in the deformed state to fully extend into it.

9. The molding and shaping fixture for a precast crucible support body according to claim 8, characterized in that: The buffer assembly (3) further includes a pressure block (32), which is fixedly connected to the end of the elastic member (31) away from the receiving groove (214). Under normal conditions, the pressure block (32) is located outside the receiving groove (214). When two adjacent support plates (1) are stacked, the pressure block (32) is located inside the receiving groove (214).

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