Ultraprecision ELID-Grinding of Aspheric WC Lens Mold for Plastic Injection Molding

Akihiko Nemoto; Hitoshi Ohmori; Yasuhiko Murata; Nobuhide Itoh

doi:10.4028/www.scientific.net/KEM.447-448.155

Paper Titles

Analysis of Motion Trajectory and Dwell Time of Abrasive in Magnetorheological Finishing with Tiny-Grinding Wheel Cluster
p.136

Polishing Mechanism of Glass Substrates with its Processing Characteristics by Cerium Oxide and Manganese Oxide Slurries
p.141

Advanced Lapping and Polishing Methods for Planarizing a Single-Crystal 4H-Sic Utilizing Fe Abrasive Particles
p.146

Methods for Prevention of Ignition during Machining of Magnesium Alloys
p.150

Ultraprecision ELID-Grinding of Aspheric WC Lens Mold for Plastic Injection Molding
p.155

Effects of Electrolyte Formulas on Electrochemical Polish Planarization of Pure Copper
p.159

Development of 2DOF Ultrasonic Vibration Cutting Device for Ultraprecision Elliptical Vibration Cutting
p.164

Investigation on Influences by Adapting Additives to Electrolytic In-Process Dressing (ELID) Grinding
p.169

Focused Ion Beam Nano-Precision Machining for Analyzing Photonic Structures in Butterfly
p.174

HomeKey Engineering MaterialsKey Engineering Materials Vols. 447-448Ultraprecision ELID-Grinding of Aspheric WC Lens...

Ultraprecision ELID-Grinding of Aspheric WC Lens Mold for Plastic Injection Molding

Abstract:

To cope with increasing demands on ultraprecision profiling and finishing of aspheric lens molds, we have implemented an ultra/ nanoprecision aspheric grinding system to be mounted with an ELID- capability and on-line feedback capability of profile accuracy. A WC mold has successfully ground and finished to be with several nanometric surface smoothness and with ultraprecise profile accuracy by just grinding process with ELID mechanism. Some specific conditions have been investigated to achieve better accuracy and quality on molds. This paper presentation introduce those R&D activities and also discuss on the latest achievements on this topics, with showing injected aspheric lenses by the molds.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 447-448)

Pages:

155-158

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.447-448.155

Citation:

Cite this paper

Online since:

September 2010

Authors:

Akihiko Nemoto, Hitoshi Ohmori, Yasuhiko Murata, Nobuhide Itoh

Keywords:

Aspheric WC Lens Mold, Aspherical Plastic Lens, ELID (ELectrolytic In-Process Dressing) Grinding, Injection Molding, Mirror Surface Finishing

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M. Saeki, T. Kuriyagawa, K. Syoji, Machining of Aspherical Molding Dies Utilizig parallel Grinding Method, Journal of the Japan Society of Grinding Engineers (JAPE), 68(8), (2002), 1067-1071.

DOI: 10.2493/jjspe.68.1067

Google Scholar

[2] H. Ohmri, Electrolytic in-process dressing (ELID) grinding for optical parts manufacturing, International Progress in Precision Engineering IPES 7(1993)134-148.

DOI: 10.1016/b978-0-7506-9484-1.50018-x

Google Scholar

[3] H. Ohmri, T. Nakagawa, Analysis of mirror surface generation of hard and brittle materials by ELID (Electrolytic in-process dressing) grinding with superfine grain metallic bond wheels, Annals of the CIRP 44(1)(1997)261-264 0.

DOI: 10.1016/s0007-8506(07)62327-0

Google Scholar

[5] [10] [15] [20] [25] [30] [35] [40] [60] 300 600 900 cooling time (sec) shape error PV(μm).

Google Scholar

[5] [10] [15] [20] [25] [30] [35] [40] 125 140 155 170 holding pressure (MPa) shape error PV (μm) Figure 9 Relation between holding pressure and shape error PV Figure 8. Relation between injection rate and shape error PV Figure 10 Relation between resin temperature and shape error PV Figure 11 Relation between cooling time and shape error PV.

DOI: 10.7454/mssh.v21i2.727.s82

Google Scholar