Quality control is an important aspect of manufacturing processes. Product quality of injection molded parts is influenced by the injection molding process. In this study statistical tools were used to develop a model that relates injection molding process variables to part quality. A statistically based model predictive control algorithm was developed for controlling part quality with manipula...

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...

It is well known that in blend modification, PC(Polycarbonate)/ABS(Acrylonitrile-Butadiene -Styrene) alloy polymers were used very common , but because of its high production cost and poor processing performance limited its application in marine materials. To improve the problem, We studied the behavior of ABS/PC alloy performance, and made a lot of exploration to increase the toughness, made i...

In this paper, some molding process parameters such as injection time, packing time, packing pressure and process temperature etc. were optimized by the Computer Aided Engineering (CAE) simulation (Moldex 3D) for injection molding of a plastic lens. Some experimental trials were carried out for verifying of the CAE simulation results with checking of the lens shrinkage and birefringence etc. as...

Taking the special-shaped plastic part as the research object, numeric simulation and experimental study of the injection molding process are completed based on the synthetical application of numeric simulation technology, orthogonal experiment method, Moldflow, injection machine and CMM. Optimal feeding system and molding process parameters are obtained and qualified products are produced. The...

Many prototype microfluidic devices are manufactured by some form of micromachining or injection molding which often leaves poor quality surface. This work presents a simple method that both significantly reduces surface roughness of microfluidic chips and at the same time is used to bond devices. The method has been tested on devices made from poly(methyl methacrylate) (PMMA) and cyclic olefin...

In this study, an adaptive optimization method based on artificial neural network model is proposed to optimize the injection molding process. The optimization process aims at minimizing the warpage of the injection molding parts in which process parameters are design variables. Moldflow Plastic Insight software is used to analyze the warpage of the injection molding parts. The mold temperature...