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Pressure control device for preparing fused quartz product by high-temperature casting method

A technology of fused silica and products, which is applied in glass manufacturing equipment, manufacturing tools, glass molding, etc. It can solve problems such as high viscosity and difficult molding, and achieve the effects of simple device structure, long molding time, and reduced production costs.

Pending Publication Date: 2022-03-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention relates to a pressure control device for preparing fused quartz products by a high-temperature melting and casting method, that is, a pressure transmission device and a pressure difference forming device are arranged in the high-temperature melting and casting equipment, aiming at solving the molding difficulty caused by high viscosity in the quartz glass melting and casting process

Method used

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  • Pressure control device for preparing fused quartz product by high-temperature casting method
  • Pressure control device for preparing fused quartz product by high-temperature casting method
  • Pressure control device for preparing fused quartz product by high-temperature casting method

Examples

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Effect test

Embodiment 1

[0025] see figure 1 , a pressure control device for preparing fused silica products by high-temperature melting and casting method. A crucible operating rod 6, a transmission motor 7, and an air pressure sensor 21 are respectively installed on the outer top and side parts of the melting and casting furnace 9, and the crucible 11 is horizontally connected to the operating rod 6. , the crucible 6 is loaded with quartz raw material 13, the bottom of the transmission motor 7 is connected to the pressure rod 10, and the bottom of the pressure rod 10 is connected with a raw material overflow-proof cover 22 with an overflow-proof structure, and the mold 12 is placed on the lower sample platform 5 inside the casting furnace 9. The graphite tube 16 connected at both ends, the upper end of the graphite tube 16 is connected to the external pipeline 15 of the mold, and the external pipeline 15 is connected to the double-sided pipe 14 connected to the bottom of the mold; The vacuum chamber...

Embodiment 2

[0029] In this example, see Figure 1-3, be provided with mold double side pipe 14 and mold outer pipeline 15, the lower end of graphite tube 16 on the sample table 5 is connected with valve 19, vacuum chamber 17 through pipeline, the upper end of graphite tube 16 is connected with mold outer pipeline 15, and the mold outer The pipeline 15 communicates with the bottom of the double-sided pipe 14 of the mold, and the molten quartz raw material is poured from the crucible 11 to the mold 12, and the formed quartz melt is closely attached to the inner wall of the mold 12, so that two sealed environments are formed above and below the quartz melt. The air at the bottom of the mold 12 is extracted through the vacuum chamber 17 to reduce the air pressure below the quartz melt, resulting in a pressure difference between the upper and lower sides of the quartz melt, and the resulting pressure difference pushes the high-viscosity quartz melt to flow to the complex molding area 20 at the ...

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Abstract

The invention relates to a pressure control device for preparing fused quartz products through a high-temperature casting method. A transmission motor and an air pressure sensor are installed at the top of a casting cavity, a pressure rod is installed at the motor, a sample table is arranged under the pressure rod, a graphite pipe with the two ends communicated is machined on the sample table, and the bottom of the graphite pipe is connected with a vacuum chamber and a vacuum pump; a valve is arranged between the graphite pipe and the vacuum chamber, the top end of the graphite pipe is connected with the interior of the mold, the crucible is installed on the operation table, and an airflow controller is arranged on a pipeline on the melting and casting furnace wall and connected with the gas cylinder. By means of the design, gas pressure and motor pressure are combined and jointly act on a high-temperature melt, flow forming of the high-viscosity quartz melt is promoted, and volatilization of raw materials and formation of bubbles in the casting process are reduced. The problem that forming is difficult in the traditional quartz casting process is solved, the production period is shortened, the production cost is saved, and the method is easily put into industrial production.

Description

technical field [0001] The invention relates to a pressure control device for preparing fused quartz products by high-temperature melting and casting, and belongs to the technical field of material processing and molding. Background technique [0002] Fused quartz, also known as quartz glass, is made of natural quartz, including silica and crystal, which is melted at high temperature. Because of its excellent physical and chemical properties, it is widely used in electronics, electrical appliances, chemical engineering and other fields. The interior of quartz glass is a network skeleton composed of silicon-oxygen tetrahedrons. The silicon-oxygen bonds with larger bond energy make the mechanical strength of quartz glass very high, which is 2-3 times that of ordinary glass. However, like most glass materials, quartz glass has The characteristics of poor toughness. [0003] Commonly used quartz glass device processing includes glass blowing, precision machining and other proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B20/00
CPCC03B20/00
Inventor 李瑛孙家斌胡永峰龙昊王常虹李文献朱明原金红明
Owner SHANGHAI UNIV