And the process of extrusion through rotating container is in-depth analysis by using of numerical simulation.
Each container contained two capsules.
In this study, an algorithm is proposed which takes into account the manufacturing (EDM and extrusion) constraints as well as container design, temperature drop criterion between the evaporator and condenser together the with the vapor and liquid pressure losses for axially grooved heat pipes.
The major objective of the present paper is to explore the complicated interactions between die design, forming parameters (i.e. ram speed, container temperature, billet temperature and extrusion ratio) and the product qualities (extrudate shape, surface condition and microstructure) by the use of finite element modelling (FEM).
A new analysis for the three-dimensional solution for the extrusion of sections with larger dimensions than the initial billet or container is presented in this paper.
The fabricated flat heat pipe in this study uses an aluminum container with 2 mm thickness and 12 channels to width direction via extrusion.
The problem tackled in this paper is a practical one encountered in the extrusion industry where for the production of sections whose dimensions are larger than the container or billet diameter there exist some difficulties and sometime it is impossible to produce such products.
The ease of processing was highly dependant on the container (tooling) temperature, the heating time of the billet, the ram speed during extrusion, the composition and the aluminide system in question.
In order to observe the development of grains and their orientation under severe plastic deformation, a small-scale forward extrusion setup was designed which allows quenching the extrusion butt together with the die and the container immediately after extrusion to preserve the grain structure evolved during the deformation.
In general, the porthole die extrusion process consists of three stages (dividing, welding, and forming stage) through the complex die structure composed of container, porthole, mandrel, welding chamber and bearing part.
