Quartz crucible forming rod

Abstract

The utility model discloses a quartz crucible forming rod which comprises a first forming rod, a second forming rod, an adjusting device and a rod tip, inclined surfaces are arranged at the bottoms of the adjusting devices; the radius of the straight arm of the first forming rod is smaller than the radius of the upper opening of the quartz crucible mold, and the radius of the straight arm of the second forming rod is equal to the radius of the lower portion of the quartz crucible mold minus the thickness of a corresponding material layer. Through cooperation of the two-section type forming rod and the adjusting device, the forming device is suitable for preparation of the quartz crucible with a thin upper wall, a thick lower wall and an inclined plane at the joint, the utilization rate of raw materials of the quartz crucible can be effectively improved, the manufacturing cost of the quartz crucible is reduced, and therefore the low-cost and high-quality quartz crucible manufacturing is achieved. The first forming rod and the second forming rod are connected through the adjusting device, and the total height of the first forming rod and the second forming rod can be adjusted, so that manufacturing of quartz crucibles with different heights or quartz crucibles with inclined planes at different positions is achieved correspondingly.

Description

Technical Field

[0001] The utility model relates to the technical field of quartz crucible manufacturing, in particular to a quartz crucible forming rod. Background Art

[0002] Quartz crucibles for solar photovoltaics are an important material for drawing single-crystal silicon rods for solar and semiconductor applications. When producing these crucibles using the electric arc process, a graphite or metal mold is first installed in a melting machine, connected by flanges and bolts. High-purity quartz sand is then poured into the mold. Forming rods are used to evenly shape the sand onto the mold's inner surface. During the crucible forming process, the distance between the forming rods and the mold is the thickness of the quartz sand layer. The mold is then placed into the melting machine, where the high temperature of the electric arc generated by the graphite electrodes melts the sand. To extract gases from the sand during the melting process, forming the transparent layer of the crucible, the crucible mold must have numerous through-holes to facilitate extraction of gases from the sand.

[0003] During the quartz sand molding process, the existing molding rod device ensures a uniform layer thickness. To prevent mold damage, the quartz sand must completely cover the mold's inner wall. Due to the characteristics of quartz sand, the molded surface forms a 45° slope at the top edge.

[0004] After the quartz crucible is melted, the thickness and quality of the quartz transparent layer within 50-100mm from the upper mouth of the quartz crucible cannot meet the product requirements, so this part needs to be cut and removed. The weight of this part accounts for 4-5% of the weight of the quartz crucible, greatly reducing the effective utilization rate of the quartz material. Further analysis found that the main reason for this anomaly is that the mold flange position is in a compatible installation position, and it is impossible to process and form an exhaust hole in the transparent layer.

[0005] High-purity quartz sand is made by cleaning and processing various quartz ores. It is a non-renewable resource. As the demand for quartz materials in photovoltaic and other industries increases, the cost of high-purity quartz sand will rise accordingly. In order to effectively improve the utilization of resources and reduce the utilization rate of quartz crucible materials.

[0006] Therefore, it is necessary to develop a quartz crucible forming rod to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to design a quartz crucible forming rod in order to solve the above problems.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A quartz crucible forming rod, comprising:

[0010] a first forming rod;

[0011] The second forming rod; the first forming rod is placed on the upper part of the second forming rod;

[0012] An adjusting device; one end of the adjusting device is connected to the lower end of the first forming rod, the other end of the adjusting device is connected to the upper end of the second forming rod, and the bottom of the adjusting device is provided with an inclined surface;

[0013] rod tip; the rod tip is installed at the bottom of the lower end of the second forming rod; with the rod tip as the center of the circle, the radius of the straight arm of the first forming rod is greater than the radius of the straight arm of the second forming rod; the radius of the straight arm of the first forming rod is less than the radius of the upper position of the quartz crucible mold, and the radius of the straight arm of the second forming rod is equal to the radius of the lower part of the quartz crucible mold minus the thickness of the corresponding material layer.

[0014] The beneficial effects of the present invention are:

[0015] The utility model cooperates with the two-stage forming rod and the adjusting device, making the application suitable for the preparation of quartz crucibles with a thin upper wall, a thick lower wall, and an inclined surface at the connection point, which can effectively improve the utilization rate of quartz crucible raw materials and reduce the manufacturing cost of quartz crucibles, thereby realizing low-cost and high-quality quartz crucible manufacturing.

[0016] The first forming rod and the second forming rod are connected by an adjusting device, and the total height of the first forming rod and the second forming rod can be adjusted to realize the production of quartz crucibles of different heights or quartz crucibles with different bevel positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the main view of this application;

[0018] Figure 2 This is a top view of the application.

[0019] The main corresponding reference numerals in the accompanying drawings are as follows:

[0020] In the figure: 1, handle; 2, first forming rod; 3, second forming rod; 4, adjustment device; 41, sleeve; 42, first bolt; 42, second bolt; 5, rod tip. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0025] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-2 As shown, a quartz crucible forming rod comprises:

[0029] First forming rod 2;

[0030] Handle 1; the handle 1 is sleeved on the outside of the upper end of the first forming rod 2;

[0031] The second forming rod 3; the first forming rod 2 is placed on the upper portion of the second forming rod 3; the second forming rod 3 includes a vertical section and an arc section, the lower end of the vertical section is connected to the upper end of the arc section, and the shape of the arc section is matched with the shape of the bottom of the quartz crucible mold;

[0032] Adjusting device 4; one end of the adjusting device 4 is connected to the lower end of the first forming rod 2, the other end of the adjusting device 4 is connected to the upper end of the second forming rod 3, and the bottom of the adjusting device 4 is provided with a slope;

[0033] Rod tip 5; the rod tip 5 is installed at the bottom of the lower end of the second forming rod 3; with the rod tip 5 as the center of the circle, the radius of the straight arm of the first forming rod 2 is greater than the radius of the straight arm of the second forming rod 3; the radius of the straight arm of the first forming rod 2 is less than the radius of the upper position of the quartz crucible mold, and the radius of the straight arm of the second forming rod 3 is equal to the radius of the lower part of the quartz crucible mold minus the thickness of the corresponding material layer.

[0034] In some embodiments, the adjustment device 4 includes a sleeve 41, a connecting portion, and three bolts. The connecting portion is inclined at a 30-45° angle, with the inclined surface located below the connecting portion. The upper end of the connecting portion is connected to the lower end of the first forming rod 2, and the lower end of the connecting portion is connected to the wall of the sleeve 41. The sleeve 41 is mounted on the second forming rod 3. The sleeve 41 is provided with a first bolt hole and two second bolt holes. The two second bolt holes (the two second bolt holes are arranged in the same vertical row) are perpendicular to the other first bolt hole. After the bolts are screwed into the bolt holes, they press against the two mutually perpendicular side walls of the second forming rod 3. There is one first bolt 42 and two second bolts 43. The first bolt 42 is screwed into the first bolt hole, and the two second bolts 43 are screwed into the two second bolt holes respectively.

[0035] The handle 1 in this application is made of wood or steel and is primarily used for operation and gripping. The first forming rod 2 is made of a wear-resistant metal material and is secured to the handle 1 by threads or welding, preventing relative rotation between the two. The second forming rod 3 is also made of a wear-resistant metal material. The rod tip 5 is made of a wear-resistant inorganic or metallic material and is connected to the second forming rod 3 by threads or welding. The height of the straight arm of the first forming rod 2 plus the adjustment device 4 is H1, which is adjusted to produce quartz crucibles of different heights. H1 is equal to the height required to cut off the top of the quartz crucible in the prior art (this cut is not required due to the configuration of this application). The height of the straight arm of the second forming rod 3, H2, is equal to the mold interior height minus H1. H2 is equal to the height of the lower portion of the produced quartz crucible. This device is used with a metal or graphite mold, with exhaust holes evenly distributed below the mold flange. A φ3-5mm inverted triangular countersunk hole is located at the center of the mold bottom to mate with the rod tip 5 of the device.

[0036] Description of working principle:

[0037] During the quartz crucible manufacturing process, quartz sand is first poured into the mold. The rod tip 5 is placed in the rotating hole at the bottom of the mold. The handle 1 is then mechanically or manually cranked, rotating the device continuously to scrape and shape the material. Depending on the desired thickness of the quartz crucible product, the material layer thickness ranges from 20-60mm. The difference between the radius of the first forming rod 2 at the top of the device and the inner radius of the mold is 3-10mm, corresponding to the thickness of the quartz sand layer during molding. This reduces the amount of quartz sand used while ensuring 100% coverage of the mold, preventing it from burning out due to high temperatures.

[0038] At the same time, the first forming rod 2 and the second forming rod 3 can be adjusted up and down by the adjusting block, which can ensure that the forming height H1 is adjusted according to different products, so that the utilization rate of quartz sand in producing different quartz crucibles with the same height mold can be maximized.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A quartz crucible forming rod, characterized in that: include: a first forming rod; The second forming rod; the first forming rod is placed on the upper part of the second forming rod; An adjusting device; one end of the adjusting device is connected to the lower end of the first forming rod, the other end of the adjusting device is connected to the upper end of the second forming rod, and the bottom of the adjusting device is provided with an inclined surface; rod tip; the rod tip is installed at the bottom of the lower end of the second forming rod; with the rod tip as the center of the circle, the radius of the straight arm of the first forming rod is greater than the radius of the straight arm of the second forming rod; the radius of the straight arm of the first forming rod is less than the radius of the upper position of the quartz crucible mold, and the radius of the straight arm of the second forming rod is equal to the radius of the lower part of the quartz crucible mold minus the thickness of the corresponding material layer.

2. A quartz crucible forming rod according to claim 1, characterized in that: The adjusting device includes a sleeve, a connecting part, and at least one bolt. The connecting part is arranged at an angle, and the inclined surface is arranged below the connecting part. The upper end of the connecting part is connected to the lower end of the first forming rod, and the lower end of the connecting part is connected to the sleeve wall. The sleeve is sleeved on the second forming rod, and at least one bolt hole is provided on the sleeve. After the rod of the bolt is screwed into the bolt hole, it presses against the side wall of the second forming rod.

3. The quartz crucible forming rod according to claim 1, characterized in that: The second forming rod includes a vertical section and an arc section. The lower end of the vertical section is connected to the upper end of the arc section. The shape of the arc section is matched with the shape of the bottom of the quartz crucible mold.

4. The quartz crucible forming rod according to claim 1, characterized in that: The quartz crucible forming device also includes a handle, which is sleeved on the outer portion of the upper end of the first forming rod.

5. The quartz crucible forming rod according to claim 2, characterized in that: The connection part is set at an inclination of 30-45 degrees.

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