Analyses on Forming Process of Ultrathin Light Guide Plate by Isothermal Equivalent Substitution Hot Embossing

LI Kai; WU Da-ming; LIU Ying; CAO Ya-nan; XU Hong; ZHAO Zhong-li; SUN Jing-yao

doi:10.3788/fgxb20194005.0616

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Analyses on Forming Process of Ultrathin Light Guide Plate by Isothermal Equivalent Substitution Hot Embossing

Device Fabrication and Physics | 更新时间：2020-08-12

- Analyses on Forming Process of Ultrathin Light Guide Plate by Isothermal Equivalent Substitution Hot Embossing
- Chinese Journal of Luminescence Vol. 40, Issue 5, Pages: 616-622(2019)
- 作者机构：
  
  北京化工大学机电工程学院, 高分子材料加工装备教育部工程研究中心北京,100029
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(51673020)
- DOI：10.3788/fgxb20194005.0616
  CLC： O439
- Received：14 August 2018，
  
  Revised：13 October 2018，
  
  Published Online：05 November 2018，
  
  Published：05 May 2019
- 稿件说明：
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李楷, 吴大鸣, 刘颖等. 等温等效替代热压印法成型超薄导光板的工艺分析[J]. 发光学报, 2019,40(5): 616-622

LI Kai, WU Da-ming, LIU Ying etc. Analyses on Forming Process of Ultrathin Light Guide Plate by Isothermal Equivalent Substitution Hot Embossing[J]. Chinese Journal of Luminescence, 2019,40(5): 616-622
李楷, 吴大鸣, 刘颖等. 等温等效替代热压印法成型超薄导光板的工艺分析[J]. 发光学报, 2019,40(5): 616-622 DOI： 10.3788/fgxb20194005.0616.

LI Kai, WU Da-ming, LIU Ying etc. Analyses on Forming Process of Ultrathin Light Guide Plate by Isothermal Equivalent Substitution Hot Embossing[J]. Chinese Journal of Luminescence, 2019,40(5): 616-622 DOI： 10.3788/fgxb20194005.0616.

摘要

针对超薄导光板微结构模具难加工的问题，结合等温热压印法，提出了一种新型的"等效替代"压印工艺，即通过控制成型工艺参数来降低微结构复制高度，实现了在基片上成型出小于模具微结构尺寸的等效结构，突破了热压印过程中模具微结构完全等大复制的思想禁锢，降低了微结构模具加工难度，从而革新了高质量超薄导光板的成型工艺。以聚甲基丙烯酸甲酯（PMMA）为基片，设计具体实验，加工0.25 mm厚的导光板，验证这一方法的可行性。实验结果表明，这种新型的"等效替代"压印工艺不仅可以降低模具的制造难度和加工成本，而且可以大大改善超薄导光板的性能，与等温热压印工艺相比均匀度提高了23%，整个成型时间缩短到了20 s。

Abstract

Aiming at the problem that the ultra-thin light guide micro-die is difficult to process

combined with the isothermal hot stamping method

a new "equivalent substitution" imprinting process is proposed

which is to reduce the microstructure replication height by controlling the molding process parameters. The equivalent structure smaller than the microstructure of the mold is formed on the substrate

which breaks through the idea of completely replicating the microstructure of the mold during the hot stamping process

reduces the difficulty of processing the microstructure mold

and thus innovates the high quality super forming process of a thin light guide plate. The specific experiment was designed with polymethyl methacrylate (PMMA) as the substrate

and the 0.25 mm thick light guide plate was processed to verify the feasibility of this method. The experimental results show that this new "equivalent substitution" imprint process can not only reduce the manufacturing difficulty and processing cost of the mold

but also greatly improve the performance of the ultra-thin light guide plate. Compared with the thermostatic upper and lower mold differential thermal imprint process

the uniformity was increased by 23% and the overall molding time was shortened to 20 s.

关键词

Keywords

references

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