Mold for preparing quartz glass rod

Abstract

The utility model relates to a mold, in particular to a mold for preparing a quartz glass rod. The mold is composed of a mold body, the mold body is a rhombic frame body with an upper opening and a lower opening, and the mold body is formed by splicing long graphite plates and short graphite plates through connecting pieces. The mold is rhombic, so that the adjacent quartz glass rods can be arranged in a staggered manner, and the quartz glass rods are arranged and sleeved in a triangular manner, so that the material waste between the quartz glass rods is reduced, the maximum material utilization rate is ensured, the material utilization rate can be increased to more than 75%, and the quantity of the quartz glass rods can be increased under the condition of limited materials. The problems that an existing production mode wastes more materials and is low in utilization rate are solved.

Description

Technical Field

[0001] This utility model relates to a mold, specifically a mold for preparing quartz glass rods. Background Technology

[0002] Quartz glass rods are made from high-purity quartz glass material and possess excellent physical and chemical properties, finding wide applications in optical communication, semiconductor manufacturing, photovoltaics, and high-end optical instruments. Currently, there are two main manufacturing processes for quartz glass rods: deposition and cutting.

[0003] The deposition method directly prepares quartz glass rods of the required diameter through CVD deposition. However, this method has low energy efficiency when producing small-diameter quartz glass rods because it requires heating the furnace environment during the heating process. It is only suitable for the preparation of large-diameter quartz glass rods.

[0004] The cutting method involves preparing a large-volume quartz glass ingot through CVD deposition, and then cutting quartz glass rods of the required diameter from the ingot. The cutting method includes the following processes:

[0005] 1 is to prepare quartz glass blanks by CVD method, cut them into blocks, and then use a straight-sleeve process to produce the product.

[0006] 2 involves preparing quartz glass blanks by CVD method into square or round quartz glass blanks through a thermal modification process, and then using a straight-sleeving process to process them.

[0007] Process 1 has high requirements for the size of raw materials. Due to the irregularity of the raw materials, there are a lot of scraps and the material utilization rate is low, only about 60%.

[0008] Process 2 is limited by the use of square or round graphite crucible molds, resulting in mostly square or round quartz glass ingots. Even after further molding, the material utilization rate remains limited. Therefore, it is necessary to design a mold for preparing quartz glass rods to address these issues. Summary of the Invention

[0009] The purpose of this invention is to provide a mold for preparing quartz glass rods that can effectively reduce material waste and increase the yield.

[0010] The technical solution of this utility model is:

[0011] A mold for preparing quartz glass rods, comprising a mold body, characterized in that: the mold body is a rhomboid frame with open top and bottom, and is composed of long graphite plates and short graphite plates spliced ​​together by connectors.

[0012] A graphite pad is provided at the acute angle between the graphite long plate and the graphite short plate. The graphite pad is a long strip with an acute triangular cross-section. The inner surfaces of the graphite long plate and the graphite short plate corresponding to the graphite pad are respectively provided with a mounting groove. The graphite pad is movably installed in the mold body through the mounting groove.

[0013] The connecting parts are arranged in an alternating vertical manner on the outer surface of the mold body connection.

[0014] The connector consists of fixing bolts and a connecting plate; the connecting plate is fixedly connected to the long graphite plate and the short graphite plate by fixing bolts.

[0015] The connector consists of a T-shaped connecting block and a connecting plate; the T-shaped connecting block is fixedly installed on the outer surface of the ends of the graphite long plate and the graphite short plate.

[0016] The connecting plate is bent, corresponding to the splicing angle of the long and short graphite plates;

[0017] The two ends of the connecting plate are provided with T-shaped connecting grooves corresponding to the T-shaped connecting blocks. The graphite long plate and the graphite short plate are movably connected by the connecting plate through the cooperation of the T-shaped connecting blocks and the T-shaped connecting grooves.

[0018] One end of the T-shaped connecting groove is closed.

[0019] The beneficial effects of this utility model are as follows:

[0020] The mold used to prepare quartz glass rods has a rhomboid cross-section. During operation, it allows adjacent rows of quartz glass rods to be staggered, enabling them to be nested in a triangular pattern. This effectively reduces material waste and increases material utilization to over 75%, maximizing material utilization and increasing the number of quartz glass rods that can be nested with limited materials. This solves the problems of excessive material waste and low utilization in existing production methods, and has a positive impact on improving enterprise efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged structural diagram at point A in the diagram;

[0023] Figure 3 This is an exploded view of the improved connector;

[0024] Figure 4 This is a schematic diagram of the T-shaped connection groove of the improved connector;

[0025] Figure 5This is a schematic diagram of the structure of the graphite pad of this utility model;

[0026] Figure 6 This is a schematic diagram of the arrangement of the quartz glass rods of this utility model;

[0027] Figure 7 This is a schematic diagram of the arrangement of quartz glass rods in Comparative Example 1;

[0028] Figure 8 This is a schematic diagram of the arrangement of quartz glass rods in Comparative Example 2.

[0029] In the diagram: 1. Graphite long plate, 2. Graphite short plate, 3. Graphite pad, 4. Connecting plate, 5. T-shaped connecting groove, 6. T-shaped connecting block, 7. Clip-on groove, 8. Quartz glass rod, 9. Fixing bolt. Detailed Implementation

[0030] The mold used to prepare quartz glass rods consists of a mold body, which is a rhomboid frame with open top and bottom, and is made of graphite long plate 1 and graphite short plate 2 spliced ​​together by connectors.

[0031] A graphite pad 3 is provided at the acute angle between the graphite long plate 1 and the graphite short plate 2 that constitute the mold body. The graphite pad 3 is a long strip with an acute triangular cross section. The inner surfaces of the graphite long plate 1 and the graphite short plate 2 corresponding to the graphite pad 3 are respectively provided with a mounting groove 7. The graphite pad 3 is movably installed in the mold body through the mounting groove 7.

[0032] The connecting parts are arranged in an alternating vertical pattern on the outer surface of the mold body connection. The connecting parts consist of fixing bolts 9 and connecting plates 4; the connecting plates 4 are fixedly connected to the graphite long plate 1 and the graphite short plate 2 by fixing bolts 9.

[0033] This mold, by fixing the graphite long plate 1 and graphite short plate 2 together with connectors to form a rhomboid frame, allows for rapid assembly and disassembly. Furthermore, because the mold is rhomboid, the cross-section of the quartz glass ingot formed after heat modification (heating and melting followed by re-solidification) is also rhomboid. This allows for misalignment between adjacent quartz glass rods 8 during insertion, enabling them to be inserted in a triangular arrangement, effectively reducing material waste and maximizing material utilization. Additionally, graphite's excellent heat resistance allows it to maintain its shape at temperatures sufficient to melt quartz glass (above 1800°C), thus preventing mold deformation through the graphite long plate 1 and graphite short plate 2. Graphite pads 3 are provided at the acute angle between the graphite long plate 1 and graphite short plate 2, filling the mold and reducing material waste at the acute angles of the heat-modified quartz glass ingot, further improving material utilization.

[0034] During operation, the graphite short plate 2 and graphite long plate 1 are sequentially connected via connector 4 to form a rhombus-shaped mold, which is placed on the base. Graphite pads 3 are placed at the acute angles of the mold. After the mold is assembled, a sufficient amount of quartz glass is filled into the mold, and the quartz glass is heat-shaped to form a rhombus-shaped quartz glass ingot. After heat-shaped, the quartz glass ingot is demolded, and quartz glass rods 8 are individually fitted onto the ingot using straight sleeves. The cross-sectional area of ​​the rhombus-shaped quartz glass ingot is 2407.57 cm², and thirty-six 4 cm quartz glass rods 8 are fitted onto it, resulting in a material utilization rate of 75%.

[0035] Because the mold is rhomboid in shape, the quartz glass rods 8 can be staggered horizontally, allowing them to be arranged in a triangular pattern for nesting. This effectively reduces material waste and maximizes material utilization, raising it to over 75%. It also increases the number of quartz glass rods 8 available with limited materials, solving the problems of excessive material waste and low utilization rates in existing production methods.

[0036] As an improvement, the connector is composed of a T-shaped connecting block 6 and a connecting plate 4; the T-shaped connecting block 6 is fixedly installed on the outer surface of the ends of the graphite long plate 1 and the graphite short plate 2.

[0037] The connecting plate 4 is bent, corresponding to the splicing angle of the graphite long plate 1 and the graphite short plate 2;

[0038] The connecting plate 4 has T-shaped connecting grooves 5 at both ends corresponding to the T-shaped connecting blocks 6. The graphite long plate 1 and the graphite short plate 2 are movably connected by the connecting plate 4 through the cooperation of the T-shaped connecting blocks 6 and the T-shaped connecting grooves 5. One end of the T-shaped connecting groove 5 is closed.

[0039] Comparative Example 1

[0040] Forty-nine quartz glass rods with a radius of 3 cm were fitted onto a cylindrical quartz glass ingot with a radius of 26.35 cm. From the outer layer to the inner layer, the number of quartz glass rods fitted were 22, 11, 11 and 5 respectively, with a material utilization rate of 63%.

[0041] Comparative Example 2

[0042] Thirty-six quartz glass rods with a radius of 3.7 cm were fitted onto a square quartz glass ingot with a side length of 47.12 cm, resulting in a material utilization rate of 69%.

Claims

1. A mold for preparing a quartz glass rod, which is composed of a mold body, characterized in that: The die body is an open rhombic frame body, which is composed of graphite long plates (1) and graphite short plates (2) through connecting pieces.

2. A mold for making a quartz glass rod according to claim 1, characterized in that: The graphite long plates (1) and the graphite short plates (2) are provided with graphite pads (3) at acute angles, the inner surfaces of the graphite long plates (1) and the graphite short plates (2) corresponding to the graphite pads (3) are respectively provided with clamping grooves (7), and the graphite pads (3) are movably installed in the die body through the clamping grooves (7).

3. A mold for making a quartz glass rod according to claim 2, characterized in that: The graphite pad (3) is a long strip body with an acute triangle cross section.

4. The mold for making a quartz glass rod according to claim 1, wherein: The connecting pieces are arranged on the outer surfaces of the connecting positions of the die body in an up-and-down interval manner.

5. The mold for making a quartz glass rod according to claim 1, wherein: The connecting pieces are composed of fixed bolts (9) and connecting plates (4); the connecting plates (4) are fixedly connected with the graphite long plates (1) and the graphite short plates (2) through the fixed bolts (9).

6. The mold for making a quartz glass rod according to claim 1, wherein: The connecting pieces are composed of T-shaped connecting blocks (6) and connecting plates (4); the T-shaped connecting blocks (6) are fixedly installed on the outer surfaces of the end heads of the graphite long plates (1) and the graphite short plates (2); and the connecting plates (4) are in a bending shape and correspond to the joint angles of the graphite long plates (1) and the graphite short plates (2).

7. A mold for making a quartz glass rod according to claim 6, characterized in that: The two ends of the connecting plate (4) are provided with T-shaped connecting grooves (5) corresponding to the T-shaped connecting blocks (6), and the graphite long plates (1) and the graphite short plates (2) are movably connected through the connecting plate (4), the T-shaped connecting blocks (6) and the T-shaped connecting grooves (5).

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