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Información tecnológica

On-line version ISSN 0718-0764

Abstract

LOPEZ, Francisco; BASELGA, Juan  and  BRAVO, Julio. Use of CAE Tools to Determine Critical Dimensions of Lenses Processed by Plastic Injection. Inf. tecnol. [online]. 2006, vol.17, n.4, pp.59-63. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642006000400011.

C-MOLD software (CAE tools, Computational Assistant Engineering) has been used to simulate the injection process of biconcave lenses. It has been found that for a given geometry the variables that control de process attain values that are excessively high. Lenses of 50 mm in diameter and very different thickness have been designed and a relationship between the geometrical parameters (thickness and curvature) and the process variables (maximum injection pressure and temperature difference at the end of injection) has been established. From the plots of the process variables against the geometrical parameters it has been possible to obtain the critical values of the geometrical parameters: 2,2 mm for the edge thickness, 0.75 mm for sagitta, 420 mm for the curvature radius and 0,4 mm for the thickness at the center of the lens.

Keywords : injection; plastics; critical dimensions; CAE tools; C-MOLD..

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