Development of Flexible Extrusion Process for Producing Tube with Greatly Twisted Fins

Upper Bound Analysis of Tube Extrusion Process Through Rotating Conical Dies with Large Mandrel Radius

In this paper, an upper bound approach is used to analyze the tube extrusion process through rotating conical dies with large mandrel radius. The material under deformation in the die and inside the container is divided to four deformation zones. A velocity field for each deformation zone is developed to evaluate the internal powers and the powers dissipated on all frictional and velocity disco...

Development and Simulation of Extrusion Lamination Process with Polyethylene

The types of packages and containers in circulation are extremely wide-ranging: glass bottles, aluminum cans, detergent containers, gift-wraps, food packaging films and so forth. According to the statistics for 2007, total expenditure on packages and containers reached 6.2 trillion yen 1). The theme of this article, extrusion lamination processing, plays an important role in manufacturing paper...

An Upper Bound Solution for Analysis of Twist Extrusion Process with Elliptical Die Cross-section

Twist extrusion process is a rather new route to produce highly strained materials. In this process, severe plastic deformation is applied by large shear strains. In current article, required energy for twist extrusion by use of admissible velocity field together with the upper bound technique is predicted. The proposed model is capable of considering the effect of various parameters such as di...

Twisted Tube Heat Exchanger Technology

Over 85% of all new heat exchanger applications in oil refining, chemical, petro-chemical, and power generation are accommodated through the use of conventional shell and tube type heat exchangers. The fundamental basis for this statistic is shell and tube technology is a cost effective, proven solution for a wide variety of heat transfer requirements. However, there are limitations associated ...

Aadenoidectomy efficacy on the extrusion of tympanostomy tube