The evaluation of a free fluid surface in a porous medium has several mathematical applications that are important in industries using molds, particularly in the fluid injection process. The vacuum-assisted resin transfer molding (VARTM) process is a promising technology in the primary composite industry. An accurate computational simulation of the VARTM process would be a cost-effective tool i...

The quantity of plastic parts in mechanical and electronic industry during past 2-3 decades has a tendency to grow up. Mechatronics systems, in particular, apply many parts of plastic materials. A plastic, which is one of the most versatile materials in the modern age, is widely used because this is an easiest way to get parts of complicated geometrical form and properties. The injection moldin...

Injection molding is one of the most common processes which are used for manufacturing different plastic parts. This method includes 3 continuous steps: filling of the mold, cooling and driving the part out. A wide range of plastic and Non-Plastic materials can be used as raw material in this process. One of the most important advantages of this way of production is that it is very economic. In...

INTRODUCTION Refractive and diffractive hybrid lenses have been designed and implemented for some industrial applications. These optical elements however are limited to low volume production or specific materials such as polymers. Although plastic lenses can be fabricated using injection molding into different geometries at high volume, these optics do not perform well under rigorous conditions...

Metal injection molding (MIM) is a metal forming technique that combines powder metallurgy with plastic molding. MIM very efficient in manufacturing small and complex products large quantities. The process has four steps: mixing, debinding, molding, sintering. This research was conducted to determine the effect of variations Sn addition, temperature, holding time on density Al-PP after sinterin...

This paper presents measurements of acoustic emission (AE) signals during the injection molding of polypropylene with new and damaged mold. The damaged injection mold has cracks induced by laser surface heat treatment. Standard test specimens were injection molded, commonly used for examining the shrinkage behavior of various thermoplastic materials. The measured AE burst signals during injecti...

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 ...

Injection velocity control in plastic injection molding is challenging as this process is inherently nonlinear, requiring an adaptive control strategy for good tracking of complex velocity trajectories. In this paper, a surface based model approach is developed tracking complex trajectories of injection velocity. This technique employs a 3-dimensional (3D) nonlinear surface model of the control...