Moulding press for chalcogenide glass components

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 mould pressing and thermoforming, and relates to a secondary pressing device for chalcogenide glass elements. Background technique [0002] With the development of society, infrared thermal imaging applications for Skynet surveillance, security, automobiles, and weaponry are becoming more and more widely used. It can break through the barriers of night, facilitate night operations, and ensure the safety of people's lives. The key to improving the overall level of infrared thermal imaging systems depends on the level of optical components, which in turn depends on the level of development of basic materials. Chalcogenide glass is an excellent basic material for the production of infrared optical components, and can be widely used in emerging technology fields such as infrared thermal imaging, energy transmission, chemical sensing, near-field microscopy, and optical frequency doublers. [0003] Compared wit...

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Problems solved by technology

[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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