Manufacturing method of glass precast body for compression molding

A technology for molding and prefabrication, applied in glass manufacturing equipment, glass molding, glass re-molding, etc., can solve the problems of increasing processing consumables and processing waste, reducing production efficiency, costing production costs, etc., and increasing raw materials. Utilization rate, increased production efficiency, no waste effect

Inactive Publication Date: 2013-04-24
汪国年
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AI Technical Summary

Problems solved by technology

In the prior art, cold processing methods such as grinding and polishing are mainly used to produce small-sized glass preforms from large-sized glass blanks, which requires multiple processes, which not only wastes processing time, but also increases processing consumables and processing waste. It also consumes a lot of production costs and reduces production efficiency

Method used

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  • Manufacturing method of glass precast body for compression molding
  • Manufacturing method of glass precast body for compression molding

Examples

Experimental program
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Embodiment 1

[0024] Lanthanum borates (B 2 o 3 -La 2 o 3 class, containing 21 wt% B 2 o 3 and 35wt% La 2 o 3 ,T g at 580°C, T s For 710°C) the glass is made with a diameter of 10mm and a volume of 150mm 3 The aspheric mirror element and the glass preform for precision molding are manufactured as follows:

[0025] First, to B 2 o 3 -La 2 o 3 Glass-like materials, through cutting, grinding, polishing, etc., to prepare a glass rod with a diameter of 30mm, and the side surface of the glass rod is polished with high precision.

[0026] (2) Fix the processed glass rod vertically in the heating furnace of the wire drawing machine through the fixture of the wire drawing machine; through the heating element of the wire drawing machine, the place close to the lower end of the large glass rod is slowly heated to 720-740 at a heating rate of 2°C / min. ℃, the glass rod is softened, the heating area of ​​the glass rod becomes thinner gradually due to gravity, the material head falls and the...

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Abstract

The invention discloses a simple method for manufacturing a glass precast body with high surface finish. The method comprises the following steps: (1) machining a cylindrical optical glass rod having a lateral surface with the high finish; and (2) preparing the glass precast body by using a hot machining method, i.e. preparing a fine glass rod with the required diameter and the high lateral surface finish in a drawing manner through an optical fibre drawing machine by utilizing the hot machining method, and cutting the fine glass rod into the required length in an online cutting manner during the drawing process, thereby obtaining the glass precast body for compression molding. The compression molding is carried out as follows: with the adoption of the traditional precise optical element for the compression molding, the lateral surface of the glass precast body is pressed by a mold during the mold pressing process, thereby forming a required optical element. As a result, the high surface finish of the optical element is achieved.

Description

technical field [0001] The invention relates to a method for manufacturing a glass preform, and belongs to the field of precision optical element manufacturing. Background technique [0002] In recent years, the development direction of optical instruments tends to be miniaturized and high-performance, which promotes the development of optical components such as lenses widely used in optical instruments to also require light weight, miniaturization and high performance. Aspherical mirrors have been widely used because of the advantages of good imaging quality, small size, light weight, and simple structure in optical systems. [0003] At present, aspherical optical lenses are mainly manufactured by advanced precision molding method. This method is to directly press the glass preform into the glass product with the required function through the precision mold under a certain temperature and pressure. The manufacturing of optical parts by optical glass molding method has the ...

Claims

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Application Information

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IPC IPC(8): C03B23/047
Inventor 汪国年
Owner 汪国年
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