Glass plate manufacturing apparatus, glass plate, glass material for press molding, optical element, and method for manufacturing thin glass
A manufacturing method and technology for glass sheets, which can be applied to optical components, glass pressing, glass manufacturing equipment, etc., and can solve problems such as forming glass sheets
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no. 1 Embodiment approach
[0132] When a plurality of cooling medium supply pipes having the same number of discharge ports as each other are used, as figure 1 As shown, the shape, size, interval, arrangement and number of the discharge ports 41 provided in each cooling medium supply pipe 4 may be equal. This enables the cooling zones to have approximately the same width towards the downstream. figure 1 An example of three coolant supply pipes 4 arranged in parallel so that four discharge ports 41 are directed upward (in the direction of the upper surface of the bottom 13 ) is shown. and figure 2 and image 3A state in which three coolant supply pipes 4 are inserted into three holes 14 is shown. The number of discharge ports 41 can be appropriately selected according to the cooling area. A plurality of cooling medium supply pipes 4 are inserted into the holes 14 of the mold bottom 13 so that the center one of the plurality of outlets provided in each cooling medium supply pipe coincides with the ...
no. 2 Embodiment approach
[0144] When using a plurality of cooling medium supply pipes having different numbers of discharge ports from each other, although the shape, size, and interval of the discharge ports 51 provided on the respective cooling medium supply pipes 5 are equal, the number of discharge ports 51 is However, the more downstream the cooling medium supply pipe 5 is, the more the number of discharge ports 51 is, so that the width of the cooling promotion region increases intermittently or continuously toward the downstream. Figure 4 It shows six coolant supply pipes 5 arranged in parallel so that the discharge ports 51 provided on the side faces upward. On the side surface of the leftmost pipe of the six cooling medium supply pipes, five outlets 51 are provided at equal intervals. Regarding the number of ejection outlets, the adjacent pipes on the right are increased by 2 successively compared with the adjacent pipes on the left. From the pipe with the above-mentioned 5 ejection outlets t...
Embodiment approach A
[0160] In the case of Embodiment A, even if the flow rate of the molten glass which flows out from a nozzle is small, a desired effect can be acquired. When the thickness of the glass plate to be formed is relatively thin, for example, it means that the width is greater than or equal to 100 mm, preferably greater than or equal to 150 mm, more preferably in the range of 200 to 300 mm, and the thickness is in the range of 6 to 30 mm, preferably in the range of 6 to 20 mm. Width / thickness It is in the range of 3-50, preferably 5-40, more preferably 10-40. The flow rate of the molten glass flowing out from a nozzle can be in the range of 20-140 mL / min, for example, Preferably it is the range of 30-120 mL / min, More preferably, it is the range of 30-80 mL / min.
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Abstract
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