A rapid and precision hot embossing of LGP micro-arch lens array inside core microgrooves: simulation and experiment

The hot embossing needs the heat preservation for precision micro-forming, thus leading to inefficiency. A hot embossing of polymer micro-arch lens array in half molten is proposed for the application of light guide plate (LGP). It only performs a thermal deformation for micron-scale surface layer t...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology Vol. 95; no. 1-4; pp. 171 - 180
Main Authors: Xie, Jin, Jiang, Yuning, Liu, Jinan, Man, Tianrong
Format: Journal Article
Language:English
Published: London Springer London 01.03.2018
Springer Nature B.V
Subjects:
Arches
Arrays
CAE) and Design
Computer simulation
Computer-Aided Engineering (CAD
Deformation
Embossing
Engineering
Industrial and Production Engineering
Irradiance
Lenses
Light
Mathematical models
Mechanical Engineering
Media Management
Original Article
Parameters
Plates (structural members)
Surface layers
Micro-grinding
Microlens array
LGP
Hot embossing
Die core
Micro-optics
ISSN:0268-3768, 1433-3015
Online Access:Get full text
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Summary:The hot embossing needs the heat preservation for precision micro-forming, thus leading to inefficiency. A hot embossing of polymer micro-arch lens array in half molten is proposed for the application of light guide plate (LGP). It only performs a thermal deformation for micron-scale surface layer to be squeezed into core microgrooves. First, the micro-optic illumination of LGP was analyzed to design the micro-arch lens array; then the micro-grinding was employed to machine smooth microgrooves on ceramic core die; finally, the hot embossing experiments were conducted to adjust the thermal and structural parameters for modeling micro-arch height. It is shown that the micro-arch lens array may be rapidly and precisely formed inside the core microgrooves in half molten. The micro-arch height reaches 22 μm at a loading time of 5 s. The loading temperature and the core microgroove angle greatly influence the micro-arch height. The parameterized model of micro-arch height and radius may be used to optimize the hot embossing variables and the core microgroove parameters. The LGP patterned with the micro-arch lens array increases the irradiance intensity by 16% and its uniformity by 210% compared with smooth one, respectively.
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ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-017-1142-z