Chalcogenide glass component pressing device

Abstract

The invention discloses a moulding press for chalcogenide glass components and belongs to the technical field of glass mould pressing and hot-forming. The moulding press is mainly used for solving the problem that the existing open-structured optical glass moulding press has devitrification, oxidation and forming defects. The moulding press is mainly characterized by comprising a pressing system, a mould system, a temperature control system, a heating system, a workbench, a press body and an atmosphere control system, wherein the press body is of a sealing structure; the atmosphere control system consists of two parts, namely an air extraction system and an inflation system; the workbench is arranged at the bottom of the inside of the press body, and the workbench is provided with a support plate through a semicircular guide rail; the heating system comprises a heating plate and an annular heating element, the heating plate is arranged in the middle of the support plate, and the annular heating element is arranged around the heating plate; and the pressing system is composed of a pneumatic pump, an air cylinder, a flange, and a replaceable press head. The moulding press disclosed by the invention has the characteristics that chalcogenide glass is internally heated uniformly in the process of secondary mould pressing, the oxidation is avoided, the material utilization rate is improved and the production efficiency is improved, and is mainly applied to secondary mould pressing devices for chalcogenide glass components.

Description

technical field [0001] The invention belongs to the technical field of glass molding thermoforming and relates to a secondary molding device for chalcogenide glass elements. Background technique [0002] With the development of society, the application of infrared thermal imaging in skynet monitoring, security, automobiles and weaponry is becoming more and more extensive. It can break through the barriers of night, facilitate the implementation of night operations, and ensure the safety of people's lives. The improvement of the overall level of the infrared thermal imaging system depends on the level of optical components, and the level of components depends on the development level of basic materials. Chalcogenide glass is an excellent basic material for making infrared optical components, and can be widely used in emerging technology fields such as infrared thermal imaging, energy transmission, chemical sensing, near-field microscopic imaging, and optical frequency doubler...

AI Technical Summary

Problems solved by technology

Usually, chalcogenide glass components are cut and processed from block glass blanks, which results in low utilization rate of materials, and due to the limitation of blank specifications, it is not easy to prepare large-scale components

[0004] The existing optical glass molding machine belongs to the open structure, which directly radiates and heats the glass blank. Using this equipment to prepare chalcogenide glass components, the open structure design will lead to oxidation of the chalcogenide glass blank, which will reduce the infrared transmission of the chalcogenide glass. On the other hand, since chalcogenide glass is a black material, compared with optical glass, the softening temperature is lower, and the heat absorption of the outer layer of the direct radiation glass blank is accelerated, resulting in uneven internal and external temperature fields, which is inevitable during the molding process. There are disadvantages such as bursting and crystallization, so the optical glass pressing equipment and pressing methods cannot meet the pressing requirements of chalcogenide glass

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