An experimental study of the thermorheological behavior of polypropylene (PP) reinforced with short glass fibers during the injection processing is described in this paper. This study was carried out using a proprietary rheometer which was designed and developed within our laboratory and is mounted on the injection machine. We have studied the variations of PP viscosity and elasticity, during isothermal flow, as a function of temperature, shear rate and glass fiber content. Furthermore we have studied the influence of the injection thermomechanical parameters during non-isothermal flowing and a pressure drop inside the feed channels and within a molding cavity of cylindrical cross section.

Industrial companies looking for permanent performance are facing challenges of reducing production costs, reducing customer delivery delays and improving their quality products, this lead them to improve their responsiveness and flexibility to meet the varying needs of customers. To cope with these constraints, several industrial companies have adopted the Lean Manufacturing (LM)  concept, based on the Toyota production system, to reduce wastage according to a methodical and structured approach that has given this proof for several years, this approach currently finds its limits, since it is based on static data, while a dynamic approach, with real-time data on customer needs and production performance, will readjust the levers of Lean Manufacturing to improve its efficiency. This paper has been aimed to show that the concept Industry 4.0 incarnates the lean Manufacturing approach by feeding it by real-time data and a real-time analysis of Big Data in a Cyber Physical Production System (CPPS), in order to improve decision-making and readjust in real time the levers of the Lean Manufacturing approach

We present in this paper a numerical simulation of the filling stage of injection molding process of thermoplastic composite reinforced with short fibers. We focused on analyzing the distribution of fiber's orientation given by the variation of values of second-order orientation's tensor in a rectangular geometry. The originality of our work is the introduction of a thermo-dependent law describing the behavior of material. This law is obtained experimentally using rheological measurements on online rheometer.

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Bio-composites with vegetal reinforcement have experienced great industrial development in various sectors of activity such as: automotive, electronics, medical, or construction. Compared with synthetic fibers, plant fibers have numerous environmental, technical, processing, economic and health advantages. With the objective of application in the dental field, we present in this paper the study of bacterial adhesion on a biomaterial composite with polypropylene reinforced vegetable fibers extracted from the Alfa plant (stepa tenassicma).For this study, two strains of bacteria from the oral bacterial flora were chosen, Lactobacillus acidophilus and Streptococcus mutans, and analyzed by spectrophotometric method.The results analysis shows clearly the formation of biofilm by bacterial adhesion is remarkable in the presence of the composite not reinforced by vegetable fibers in comparison with the biocomposite reinforced by Alfa fibers, and more remarkably formed by the strain Streptococcus mutans than with the strain Lactobacillus acidophilus.