A rod-like raw material production apparatus for electronic-grade quartz glass fiber cloth

Abstract

The utility model discloses a kind of bar-shaped raw material production equipment of electronic grade quartz glass fiber cloth, including furnace body and the furnace cover located at the upper end of furnace body, heat preservation layer is equipped in furnace body, crucible is installed in heat preservation layer, furnace cover is connected with the feeding pipe that is inserted into crucible, electric heating net is equipped in the periphery of crucible, the exhaust pipe that is inserted into the upper of crucible is connected with one side of furnace cover, inert gas pipe that is inserted into the upper portion of crucible is connected with the penetration of furnace body, forming mould and the rod-pulling pipeline for quartz finished product are connected with the lower end of crucible, air cooling jacket and water cooling jacket are sequentially equipped from top to bottom in the periphery of rod-pulling pipeline.The utility model can carry out echelon cooling to bar-shaped quartz finished product in forming, prevent bar-shaped raw material of melting forming to produce bubble and other defects, inert gas pipe can assist exhaust pipe to discharge impurity gas in crucible, further avoid bar-shaped raw material of melting forming to produce bubble and other defects, guarantee the forming quality of bar-shaped raw material.

Description

Technical Field

[0001] This utility model relates to the field of quartz glass technology, and in particular to a rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth. Background Technology

[0002] Electronic-grade quartz glass fiber cloth, also known as "electronic cloth," is a precision base material made from electronic-grade quartz glass fiber through special weaving and surface treatment processes. It is primarily used in the manufacture of PCB copper-clad laminates. Key performance parameters of electronic cloth (such as thickness, fiber openness, warp and weft uniformity, and surface treatment compatibility) directly affect the signal transmission integrity, heat dissipation efficiency, and reliability of PCBs in high-frequency, high-speed, and high-power scenarios. The quality and purity of the rod-shaped raw materials used in electronic cloth directly impact its performance. This is because the presence of trace amounts of metallic impurities in the rod-shaped raw materials will result in conductive impurities in the electronic cloth, leading to poor electrical insulation performance of the PCB copper-clad laminate. Furthermore, the presence of microbubbles in the rod-shaped raw materials will affect the insulation reliability of PCB copper-clad laminates used in high-precision applications such as computers and other electronic devices. Therefore, the quality and purity of the rod-shaped raw materials used in electronic cloth are of paramount importance.

[0003] However, in the existing continuous melting method for producing rod-shaped raw materials for electronic-grade quartz glass fiber cloth, the cooling of the quartz solution in the crucible during the continuous melting furnace is not uniform enough, and the venting zone does not precisely control the venting volume in the crucible. This causes defects such as bubbles and air lines to easily form in the melted rod-shaped raw materials. Consequently, the quality of the electronic-grade quartz glass fiber produced by melting and drawing the rod-shaped raw materials is poor. As a result, the quality of the processed and woven electronic cloth is poor, and the performance of the printed PCB copper-clad laminate is also poor. Utility Model Content

[0004] To address the technical problems in existing continuous melting furnace production where the cooling of the quartz solution in the crucible is not uniform and the exhaust volume is not precisely controlled, resulting in defects such as bubbles and gas lines in the melted rod-shaped raw materials, this utility model provides the following technical solution.

[0005] This utility model discloses a rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth, comprising a furnace body and a furnace cover located at the upper end of the furnace body. The furnace body is provided with a heat insulation layer, and a crucible is installed inside the heat insulation layer. The furnace cover is connected to a feed pipe extending into the crucible. An electric heating grid is provided around the outer periphery of the crucible. An exhaust pipe extending above the crucible is connected to one side of the furnace cover. An inert gas pipe extending into the upper part of the crucible is connected through the furnace body. A forming mold and a rod-drawing pipe for the quartz finished product are connected to the lower end of the crucible. An air-cooled jacket and a water-cooled jacket are arranged sequentially from top to bottom around the outer periphery of the rod-drawing pipe.

[0006] As a further technical solution, the air-cooled jacket is connected to a ventilation pipe that runs through the furnace body, and the ventilation pipe is connected to a blower.

[0007] As a further technical solution, the water-cooling jacket is connected to a circulating water tank.

[0008] As a further technical solution, the inert gas pipe is connected to an inert gas tank located on one side of the furnace body, and the outlet end of the inert gas tank is connected to a heating device.

[0009] As a further technical solution, the intake volume of the inert gas pipe is not less than the exhaust volume of the exhaust pipe.

[0010] As a further technical solution, the electric heating mesh is uniformly arranged around the outer periphery of the crucible.

[0011] The beneficial effects of this invention are as follows: The crucible of this invention is connected to a forming mold and a drawing pipe for the quartz product to pass through at its lower end. The outer circumference of the drawing pipe is provided with an air-cooling jacket and a water-cooling jacket from top to bottom. This allows for stepped cooling of the forming rod-shaped quartz product, preventing defects such as bubbles from forming in the molten rod-shaped raw material, and ensuring the forming quality of the electronic-grade quartz glass fiber cloth rod-shaped raw material. Simultaneously, an exhaust pipe is provided above the crucible to discharge impurity gases generated during the quartz sand melting process. An inert gas pipe is located above the molten quartz liquid surface in the upper part of the crucible, and the inlet volume of the inert gas pipe is not less than the exhaust volume of the exhaust pipe. This ensures stable gas pressure inside the crucible while assisting the exhaust pipe in discharging impurity gases from the crucible, further preventing defects such as bubbles from forming in the molten rod-shaped raw material, ensuring the forming quality of the rod-shaped raw material. Consequently, the quality of the electronic-grade quartz glass fiber subsequently produced by melting and drawing the rod-shaped raw material is better, resulting in better quality electronic cloth after processing and weaving. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth of this utility model; In the diagram: 1-furnace body; 2-furnace cover; 3-insulation layer; 4-crucible; 5-electric heating grid; 6-feed pipe; 7-exhaust pipe; 8-forming mold; 9-air cooling jacket; 10-ventilation pipe; 11-blower; 12-water cooling jacket; 13-circulating water tank; 14-inert gas pipe; 15-inert gas tank; 16-drawing rod pipe; 17-quartz finished product. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0014] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] like Figure 1 As shown, this utility model discloses a rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth, comprising a furnace body 1 and a furnace cover 2 located at the upper end of the furnace body 1. Both the furnace body 1 and the furnace cover 2 are made of stainless steel and are sealed together. The furnace body 1 is provided with a heat insulation layer 3, which is filled with heat insulation sand to effectively insulate the interior and prevent heat loss.

[0016] In a preferred embodiment, a crucible 4 is installed inside the insulation layer 3, and a feed pipe 6 extending into the crucible 4 is connected to the furnace cover 2. High-purity quartz sand raw material enters the crucible 4 through the feed pipe 6. At this time, an electric heating mesh 5 is provided around the outer periphery of the crucible 4. The electric heating mesh 5 is evenly arranged around the outer periphery of the crucible 4, and the electrodes of the electric heating mesh 5 penetrate through the furnace body 1 and are connected to an external power source. The electric heating mesh 5 heats the crucible 4 and the quartz sand inside the crucible 4, melting the high-purity quartz sand. The mesh structure of the electric heating mesh 5 can uniformly heat the quartz sand inside the crucible 4, ensuring the quality of the quartz sand melting. At the same time, a forming mold 8 and a pull rod pipe 16 for the quartz finished product 17 to pass through are connected to the lower end of the crucible 4. The molten quartz solution is pulled out and cut by the existing pull rod mechanism through the forming mold 8 and the pull rod pipe 16.

[0017] In a preferred embodiment, the outer periphery of the rod-drawing pipe 16 is provided with an air-cooling jacket 9 and a water-cooling jacket 12 from top to bottom. This allows the air-cooling jacket 9 and water-cooling jacket 12 to provide stepped cooling for the forming rod-shaped quartz product, preventing defects such as air bubbles from forming the melted rod-shaped material and ensuring the forming quality of the rod-shaped material. The air-cooling jacket 9 is connected to a ventilation pipe 10 that penetrates the furnace body 1. The ventilation pipe 10 is connected to a blower 11, which blows ambient temperature air through the ventilation pipe 10 onto the air-cooling jacket 9 and removes heat through a through-hole on the other side of the air-cooling jacket 9. The water-cooling jacket 12 is connected to a circulating water tank 13. A circulating water pump draws water from the circulating water tank 13 into the water-cooling jacket 12 to further cool the outer periphery of the rod-drawing pipe 16.

[0018] In a preferred embodiment, an exhaust pipe 7 is connected to one side of the furnace cover 2. The exhaust pipe 7 penetrates the furnace cover 2 and extends above the crucible 4. The exhaust pipe 7 is used to discharge trace amounts of impurity gases generated during the quartz sand melting process, reducing the adverse effects of impurity gases on the quartz solution. Simultaneously, an inert gas pipe 14 is connected to the furnace body 1, extending into the upper part of the crucible 4. The inert gas pipe 14 also penetrates the crucible 4, and its outlet is above the surface of the quartz solution inside the crucible 4. Furthermore, the inert gas pipe 14 is connected to an inert gas container 15 located on one side of the furnace body 1. A heating device is connected to the outlet end of the inert gas container 15. The heated inert gas enters the crucible 4 through the inert gas pipe 14 and purges the impurity gases above the surface of the quartz solution inside the crucible 4, causing the impurity gases to be discharged from the exhaust pipe 7.

[0019] It should be understood that the inlet volume of the inert gas pipe 14 is not less than the exhaust volume of the exhaust pipe 7, so as to discharge the impurity gas while keeping the gas pressure inside the crucible 4 stable.

[0020] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A rod-shaped raw material production device for electronic-grade quartz glass fiber cloth, comprising a furnace body (1) and a furnace cover (2) located at the upper end of the furnace body (1), wherein a heat insulation layer (3) is provided inside the furnace body (1), a crucible (4) is installed inside the heat insulation layer (3), and a feed pipe (6) extending into the crucible (4) is connected to the furnace cover (2), characterized in that: The crucible (4) is provided with an electric heating grid (5) on its outer periphery. The furnace cover (2) is connected to an exhaust pipe (7) extending into the top of the crucible (4) on one side. The furnace body (1) is connected through an inert gas pipe (14) extending into the upper part of the crucible (4). The lower end of the crucible (4) is connected to a molding mold (8) and a pull rod pipe (16) for the quartz finished product (17) to pass through. The pull rod pipe (16) is provided with an air-cooled jacket (9) and a water-cooled jacket (12) from top to bottom on its outer periphery.

2. The rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth according to claim 1, characterized in that: The air-cooled jacket (9) is connected to a ventilation pipe (10) that runs through the furnace body (1), and the ventilation pipe (10) is connected to a blower (11).

3. The rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth according to claim 1, characterized in that: The water cooling jacket (12) is connected to a circulating water tank (13).

4. The rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth according to claim 1, characterized in that: The inert gas pipe (14) is connected to an inert gas tank (15) located on one side of the furnace body (1), and the outlet end of the inert gas tank (15) is connected to a heating device.

5. The rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth according to claim 1, characterized in that: The intake volume of the inert gas pipe (14) is not less than the exhaust volume of the exhaust pipe (7).

6. The rod-shaped raw material production equipment for electronic-grade quartz glass fiber cloth according to claim 1, characterized in that: The electric heating mesh (5) is evenly arranged around the outer periphery of the crucible (4).

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