| CPC B29C 43/52 (2013.01) [B29C 35/0288 (2013.01); B29C 43/04 (2013.01); B29C 2043/147 (2013.01); B29C 2043/3615 (2013.01); B29C 2043/5816 (2013.01); B29C 2043/5891 (2013.01); B29L 2007/002 (2013.01)] | 5 Claims |
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1. A processing method of a curved plastic panel, comprising:
providing a flat plastic substrate;
forming a flat hard coating layer on at least one surface of the flat plastic substrate;
forming a flat optical functional layer on the hard coating layer of the flat plastic substrate;
forming a flat printing layer on at least one surface of the flat plastic substrate;
cutting the flat plastic substrate into a predetermined shape by a cutting machine; and
after cutting the flat plastic substrate into the predetermined shape, using a hot pressing and curving device to perform a hot pressing and curving processing on the flat plastic substrate having the hard coating layer, the optical function layer and the printing layer, in order to obtain a curved plastic substrate having the hard coating layer, the optical function layer and the printing layer;
wherein, the hot pressing and curving device comprises: an upper die with variable curvature, a lower die with variable curvature, a plurality of upper heaters, a plurality of upper temperature sensors, a plurality of lower heaters, and a plurality of lower temperature sensors; the plurality of the upper heaters and the plurality of the upper temperature sensors are distributed in each area of the upper die; the plurality of the lower heaters and the plurality of the lower temperature sensors are distributed in each area of the lower die; the upper die and the lower die are matched correspondingly, and curvatures of the upper die and the lower die can be adjusted at least locally; the hot pressing and curving device is used to process the hot pressing and curving process of the flat plastic substrate in the following steps:
adjusting the curvatures of the upper die and the lower die to be flat, and sandwiching the flat plastic substrate between the upper die and the lower die, and using the plurality of the upper heaters and the plurality of the lower heaters to heat the flat plastic substrate to a predetermined temperature, and using the plurality of the upper temperature sensors and the plurality of the lower temperature sensors to sense and monitor the temperature of each area of the flat plastic substrate in order to maintain the temperature of each area of the flat plastic substrate at the predetermined temperature;
adjusting the curvatures of the upper die and the lower die to a first curvature, such that the flat plastic substrate sandwiched between the upper die and the lower die is processed by the upper die and the lower die into the curved plastic substrate with the first curvature; in the meantime, the plurality of the upper temperature sensors and the plurality of the lower temperature sensors continue to sense and monitor that the temperature of each area of the curved plastic substrate with the first curvature is maintained at the predetermined temperature; and
adjusting the curvatures of the upper die and the lower die to a second curvature, such that the curved plastic substrate sandwiched between the upper die and the lower die is processed by the upper die and the lower die into the curved plastic substrate with the second curvature; in the meantime, the plurality of the upper temperature sensors and the plurality of the lower temperature sensors continue to sense and monitor that the temperature of each area of the curved plastic substrate with the second curvature is maintained at the predetermined temperature; wherein the second curvature is larger than the first curvature.
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