A Study of Two-Stage Micro Injection Compression Molding Process for Diffractive Optical Lens

2007 ◽  
pp. 1211-1214
Author(s):  
Chao Chang A. Chen ◽  
Shi Chi Kao
Keyword(s):  
Compression Molding ◽  
Molding Process ◽  
Two Stage ◽  
Optical Lens ◽  
Injection Compression Molding

Injection Compression Molding Process and Mould Design of Plastic Optical Lens

2012 ◽  
Vol 501 ◽  
pp. 321-324 ◽  
Author(s):  
Qiu Xiang Bu ◽  
Jian Yi Zhu ◽  
Qing Zhen Yin
Keyword(s):  
Dimensional Accuracy ◽  
Compression Molding ◽  
Molding Process ◽  
Optical Lens ◽  
Stress Problem ◽  
Injection Process ◽  
Deformation Problem ◽  
Mould Design ◽  
Injection Compression Molding

The characteristic of injection compression molding technology and the application of the technology in mould for the plastic optical lens were introduced. The structure and the work principle of the mould for optical lens were designed and described, The stress problem in the injection process was resolved, the deformation problem and dimensional accuracy of product were improved.

A Study of Two-Stage Micro Injection Compression Molding Process for Diffractive Optical Lens

2007 ◽  
Vol 364-366 ◽  
pp. 1211-1214 ◽  
Author(s):  
Chao Chang Arthur Chen ◽  
Shi Chi Kao
Keyword(s):  
Mold Insert ◽  
Fresnel Lens ◽  
Compression Molding ◽  
Piezo Actuator ◽  
Molding Process ◽  
Spherical Lens ◽  
Two Stage ◽  
Optical Elements ◽  
Micro Features ◽  
Injection Compression Molding

This research aimed to develop a novel two-stage micro injection compression molding (μ-ICM) process for fabrication of plastic diffractive optic elements (DOE). The DOE was designed with the spherical coefficients and the Fresnel lens. A piezo actuator was installed inside the mold plate for activating the mold insert for the second compression motion for micro ICM of the DOE lens. The first experiment proceeded to find the operation window of Fresnel lens and then compare the product weight of flat spherical lens by injection molding (IM), injection compression molding (ICM) and μ-ICM. The second experiment was to investigate the effectiveness of micro compression activated by the piezo actuator by the transfer ratio of grooves (TRG) of the DOE lens with spherical lens and Fresnel lens. Results showed that the μ-ICM of the DOE can obtain the highest TRG than that of IM and conventional ICM processes. Therefore, results of this research can be explored to related aspheric optical elements with micro features, such as fine lens used in the zoom lens of camera.

Three-dimensional numerical analysis of injection-compression molding process

2011 ◽  
Vol 52 (4) ◽  
pp. 901-911 ◽  
Author(s):  
Jae-Yun Ho ◽  
Jang Min Park ◽  
Tae Gon Kang ◽  
Seong Jin Park
Keyword(s):  
Numerical Analysis ◽  
Three Dimensional ◽  
Compression Molding ◽  
Molding Process ◽  
Injection Compression Molding

A Numerical Study of an Injection-Compression Molding Process by Using a Moving Grid

2012 ◽  
Vol 249-250 ◽  
pp. 472-476 ◽  
Author(s):  
Bambang Arip Dwiyantoro
Keyword(s):  
Stokes Equations ◽  
Numerical Study ◽  
Three Dimensional ◽  
Compression Molding ◽  
Navier Stokes ◽  
Molding Pressure ◽  
Moving Grid ◽  
Molding Process ◽  
Melt Temperature ◽  
Injection Compression Molding

A numerical study for the simulation of melt in an injection-compression molding process by using moving grid is proposed in this paper. The fully three-dimensional Navier-Stokes equations are solved together with the front transport equation using a front capturing approach. Different from previous studies, the proposed model can take the movement of cavity through a moving grid approach. The melt filling of a disk is conducted to illustrate the applications of the proposed numerical model with several computations under different processing conditions. The numerically predicted results show the influence of compression time or compression speed in determining the molding pressure and the melt temperature.

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