Computer-Aided Design of a Respirator Facepiece Model

摘要

This paper describes the evaluation and acquisition of CAD/CAM technology required for the design and development of complex sculptured surfaces for molding rubber and elastomeric materials. Benchmark tests incorporating the complex 3-D geometry that such a design project must handle were performed with various systems vendors and a time-sharing system was chosen. Geometry was constructed using bi-parametric cubic patches and cutter paths were plotted over these surfaces. A post-processor has been prepared for a three-axis numerical control milling machine and a cavity cut to vacuum-form a thermoplastic rubber for a prototype. Keywords: Human factors engineering; Anthropometric data; CADD(Computer Aided Design and Drafting); French language; and Numerical code programming. (Author)