Power-adjustable spectacle lenses, based on the Alvarez-Lohmann principle, can be used to provide affordable spectacles for subjective refractive errors measurement and its correction. A new mechanical frame has been designed to maximize the advantages of this technology. The design includes a mechanism to match the interpupillary distance with that of the optical centers of the lenses. The fra...

Injection molding technology should assure a high level of quality control of the molded parts in an automated way. Inherent complexities of the process make mathematical modeling di¢cult, hindering the control quality demands of conventional methods. Neural networks adaptive data based technology has been successfully applied in industrial applications since these rely on highly nonlinear mode...

An interactive computer-based design system is developed to eliminate the need for costly iterations of protype tooling in injection molding. A knowledge-based synthesis system is constructed to embody the principle of a rational design strategy for injection molding by combining a rule-based expert system with process analysis programs. The thermomechanical properties of a molded part are pred...

Injection molding is widely used to produce plastic components with large lot size. However, quality failures occur during cycles. These can be minimized through real-time process monitoring. This article reports on a cloud-based digital twin (DT) that supported by A-based control of parameters and help companies detect product in real time. Process their interrelationship failure were studied ...

The presence of an already molded component during the second and subsequent molding stages makes multi-material injection molding different from traditional injection molding process. Therefore, designing multi-material molded objects requires addressing many additional manufacturability considerations. In this paper, we first present an approach to systematically identifying potential manufac...

We demonstrate a simple process for the fabrication of rigid plastic master molds for soft lithography directly from (poly)dimethysiloxane devices. Plastics masters (PMs) provide a cost-effective alternative to silicon-based masters and can be easily replicated without the need for cleanroom facilities. We have successfully demonstrated the use of plastics micromolding to generate both single a...