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
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[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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