BACKGROUND Secondary to circulating maternal estrogens, a baby's ear cartilage is unusually plastic during the first few weeks of life, providing an opportunity to correct ear deformities by molding. If molding is initiated during the first days of life with a more rigid molding system than previously described in the literature, the authors hypothesized that treatment time would be reduced and...

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...

Creating highly articulated miniature structures requires assembling a large number of small parts. This is a very challenging task and increases cost of mechanical assemblies. Insert molding presents the possibility of creating a highly articulated structure in a single molding step. This can be accomplished by placing multiple metallic bearings in the mold and injecting plastic on top of them...

Injection molding is a manufacturing process for producing parts from both thermoplastic and thermosetting plastic materials. When the material is in contact with the mold wall surface, one has three choices: i no slip which implies that thematerial sticks to the surface ii partial slip, and iii complete slip 1–5 . Navier 6 in 1827 first proposed a partial slip condition for rough surfaces, rel...

This paper will present recent technological advances in the field of replicated, microstructured plastic optics, and their applications in display optics. A number of technology areas will be discussed, including moth-eye Antireflective MicrostructureTM, High Precision Molding (HPM), high temperature polymers, and one-piece, diffusive imaging screens. Applications discussed will include field ...

With science and technology development, the world plastics production and consumption have been increasing continuously in the recent twenty years. The plastic injection molding has become the most widely applied mass-production technology, as it can shorten the finished product manufacturing cycle to raise productivity with products of low plastics waste, high size precision and high quality ...

The "RapidTool" Short Run (SR) Tooling Process using the Copper Polyamide material provides a route to mold inserts for injection molding made directly in the Selective Laser Sintering machine. The STL files for the mold inserts are shelled and conformal cooling lines and ejector pin guides are added before SLS processing. Sintering of the material in the SLS machine provides quick metal/plasti...

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...

A plastic, 95-GHz rectangular waveguide with an integrated plastic flange has been successfully demonstrated using micro hot embossing and electroplating technologies. Two prototype devices with integrated flanges on both ends have been tested using an Agilent PNA 5250 network analyzer. The prototype with non-metallized flange shows return loss s11 and insertion loss s21 values of −21.5 and −1....