Manufacturing method of drawn glass member, manufacturing method of spacer, and manufacturing method of image display apparatus
The technology of an image display device and manufacturing method, which is applied in glass forming, glass reshaping, manufacturing tools, etc., can solve the problem that warping of drawn glass parts cannot be corrected, etc.
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no. 1 example
[0032] 2 and 3 are explanatory diagrams showing a first example of a method for manufacturing a spacer of an image display device according to the present invention. Fig. 3 is a sectional view taken along line A-A' of Fig. 2 .
[0033] For example, "SK18" manufactured by Sumita Optical Glass, Inc. was used as the glass substrate 10, which was drawn into the spacer 9 of the image display device.
[0034] One end of a glass substrate 10 processed into a predetermined shape (having a groove 10') is held by a holding member 11 of a substrate supply device 15. By the substrate supply device 15 , the holding member 11 is gradually lowered, and the other end of the glass substrate 10 is supplied into the heating furnace 12 including the heating coils 18 to 21 . The other end of the glass substrate 10 is continuously pulled out, and heated and softened to a temperature at which it can be drawn. As the heating temperature, a temperature not lower than the softening temperature is app...
no. 2 example
[0049] 4 is an explanatory diagram showing a second example of a method for manufacturing a spacer of an image display device according to the present invention. In FIG. 4, the same reference numerals as those in FIG. 3 denote the same components and parts.
[0050] Basically, the example in FIG. 4 is similar to the first example shown in FIGS. 2 and 3 , but differs in that the heating coils 18 and 19 that mainly heat the long side of the glass substrate 10 The grooves are gradually separated from each other in the direction of the groove 10' from one side to the groove 10' (increasing distance).
[0051] In the case where the heaters heating the long sides of the glass substrate are gradually separated, similar to the case shown in FIG. irregularity. As a result, a drawn part free from warpage can be obtained.
[0052] The cutting of the drawn glass member 13' (further processing performed if necessary for manufacturing the spacer 9 (see Fig. 1)) and the manufacturing proc...
no. 3 example
[0054] In this embodiment, the distance between the heater coils 18 to 21 and the glass substrate 10 in FIG. 3 is constant, but the diameter of the heater 21 is made larger than that of the heaters 18 to 20 so that the radiation energy is enhanced. .
[0055] In this example, the glass substrate having a region where the heat capacity is asymmetrical on both sides with respect to the central axis of the drawing direction can be heated so that the temperature of the glass substrate is bilaterally symmetrical. For this reason, the drawn glass parts 13 and 13' and the separator 9 (see FIG. 1 ) produced have excellent straight-ahead properties, and the obtained separator 9 has satisfactory shape reproducibility. Therefore, high precision between the face plate 5 and the back plate 1 shown in FIG. 1 is satisfactory in terms of each partition 9 and between a plurality of partitions 9 . As a result, distortion on the image display surface, bending and collapse of the spacer 9 at and...
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Abstract
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