نتایج جستجو برای: molding
تعداد نتایج: 5327 فیلتر نتایج به سال:
This paper describes a geometric algorithm for automated design of multi-stage molds for manufacturing multi-material objects. In multi-stage molding process, the desired multimaterial object is produced by carrying out multiple molding operations in a sequence, adding one material in the target object in each mold-stage. We model multi-material objects as an assembly of single-material compone...
A stiffness-based ejection condition for injection molding is introduced and utilized for evaluation of different polymer materials. Comparison with industrial practice and other commonly used ejection criteria, such as molded part temperature, indicates that this approach not only can be an alternative when the ejection temperature of the polymer part is unavailable, but also is able to better...
Special potentials of plaster causes that it becomes one of the mostly used materials in Iranian architecture in various historical periods. The potentials including low price than other materials, optimum resistance to environmental factors, fast hardening, ductility and good paintability are the main reasons for being using widely in Iranian architecture. These features results in using the p...
In this Account, we describe the use of perfluoropolyether (PFPE)-based materials that are able to accurately mold and replicate micro- and nanosized features using traditional techniques such as embossing as well as new techniques that we developed to exploit the exceptional surface characteristics of fluorinated substrates. Because of the unique partial wetting and nonwetting characteristics ...
Injection molding process is one of the most important methods of forming in the plastics manufacturing industry. Shrinkage and out of roundness are phenomenons that affect the final product quality. In this study, the effect of the thickness of cylindrical parts from polypropylene material on shrinkage and out of roundness has been investigated. For this purpose, injection molding process is s...
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