Paper Titles
A Study of the Scallop Generation Mechanism in Ultra-Precision Raster Milling
p.1262
Modeling and Tolerancing for Complex Aperture Imaging Systems
p.1268
A Framework of a Surface Generation Model in Fast Tool Servo (FTS) Machining of Optical Microstructures
p.1274
Investigation on the Modeling and Ageing Characteristics of the HID Car Headlight Automotive System
p.1280
Grain Size Effect in Sheet Metal Microforming Simulation Adopting Strain Gradient Concept
p.1285
Target Tracking in Micro Injection Molding
p.1292
Research of Surface Generation Mechanisms in Single-Point Diamond Turning
p.1296
Fabrication of Nanotemplate and Nanowires from Bulk Aluminum at Room Temperature
p.1302
Study on Flow Imbalance during Filling a Multi-Cavity Mold Using a H-type Runners
p.1306

Study on Flow Imbalance during Filling a Multi-Cavity Mold Using a H-type Runners

Article Preview

Abstract:

This study reports the experimental investigation on the flow imbalance phenomena during filling symmetrical multi-cavity in injection molding of optic elements. There are two aspects in this study: First, the flow imbalance in the eight-cavity mold with normal H-type symmetric runners were observed and measured with aid of short-shot experiments. Second, the effects of three processing conditions including injection speed, melt temperature and mold temperature on flow imbalance were investigated. Flow imbalances are consistently observed and quantitatively measured. The results have shown that proper injection speed, high melt and high mold temperature can reduce the flow imbalance.

You might also be interested in these eBooks
Optics Design and Precision Manufacturing Technologies View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 364-366)

Pages:

1306-1311

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.364-366.1306

Citation:

Cite this paper

Online since:

December 2007

Authors:

Sen Yeu Yang, Tzu Chien Huang, Po Hsun Huang, Tai Yu Ko

Keywords:

Flow Imbalance, Multi-Cavity Injection Molding, Shear Heating

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] J. Beaunomt, J. Ralston, A. Shuttleworth and M. Camovale, Troubleshooting cavity to cavity various in multi cavity injection molds, Journal of Injection Molding technology, v. 3, issue 2, PP 88-99. (1999).

Google Scholar

[2] J. W. Bozzelli, Some Reasons Not To Use Multi-Cavity(>4) Tools, ANTEC (2000).

Google Scholar

[3] H. E. Casaldi, T. Michel, Process Window as Effected by Shear Induced Flow Imbalance in Multicavity Molds, ANTEC (2001).

Google Scholar

[4] P. Auell and M. Bailey, Effect of Thermoplastic Elastomer Material Properties on Mold Filling Imbalances, ANTEC (2002).

Google Scholar

[5] G. Y. Su, H. Yokoi, W. M. Yang, Study on Filling Balance of Plastic Injection Molding in Multi-Cavity Mold with"H"Pattern Runner System, PPS (2003).

Google Scholar

[6] Information of Beaumont Runner Technologies, Inc. on http: /www. meltflipper. com.

Google Scholar