Paul Bere

Research Concerning the Optimum Extrusion Temperature for Reinforced Polyamide

Polymeric materials extrusion is a very complex manufacturing process opened for new research. In this paper the authors use for extrusion polyamide 6.6 reinforced with 20% glass fibres. This material offers very good mechanical, thermal and frictional proprieties. The improvement of these proprieties can be realized through the optimization of the extrusion process. Temperature is a very important parameter for obtaining good quality products, so to choose the proper values of it, is an interesting challenge. It was proved that the main influence upon the products quality have the temperatures from the metering zone and from the forming zone so the optimization of these is of maximum importance for the quality of the products. The Response Surface Method (RSM), based on ANOVA - Analysis of Variance model was used for optimization the temperatures from the metering zone and from the forming zone.

Methodology for evaluate the form deviations for formula one nose car

The paper presents a measuring strategy for a Formula One car using a Coordinate Measuring Machine (CMM) and a 3D laser scanning devices. The measurement procedures outlined the dimensional deviation of the CAD model and prototype made of composite material. The authors present two methods for the determination of symmetry for components of a Formula One car based on measuring and 3D scanning.

Experimental and Theoretic Research Regarding Extrusion Optimization for Reinforced Polyamide (PA 6.6 – 10 % GF)

This paper presents the possibility of extrusion optimization using Design Expert software for statistical analyze and also for the recommendation of some manufacturing data. Mechanical characteristics are determined on samples from extruded tubes. On these samples, ANOVA (Analysis of variance) software is used, in order to determine the optimal values of the temperatures in different zones. The material is polyamide 6.6, reinforced with 10 % glass fiber (PA 6.6 – 10 % GF). The authors want to present the influence of the reinforcement degree upon some mechanical characteristics of the products made by extrusion. Considering the homogeneity of the polymeric melt the product’s quality will be analyzed. During the extrusion process a series of parameters (extrusion speed, the pellets feed, processing temperature etc.) are involved and they must be taken into account to achieve calibrated and qualitative products.

Mold Design for Polystyrene Plastic Anchor

The paper presents the entire process of designing and optimizing an injection mold for a polystyrene plastic anchor. The design process begins with a comprehensive market study of the polystyrene plastic anchors available on the Romanian market, and the results of this study are then used for the creation of a new model of anchor. After this first stage of design, the resulted model is optimized in terms of the injection process using the simulation software Autodesk Moldflow Adviser. After establishing the final form of the polystyrene plastic anchor, the mold is designed in Catia V5 using a series of standardized components. Manufacturing set-up is done in Catia V5 and Cimatron. In the end, the validation of the mold is performed using the injection machine Haitian Mars 2-2500.

Research Concerning Chalk‘s Influence on Composite-Based Melamine's Compressive Strength

The main goal of the research is to find new recipe for composite based melamine, in order to obtain less toxic products. In the paper there are presented the equipment and the experiments made by the authors in order to obtain samples from a composite material made from melamine and different ratio of chalk. A compression test was performed and the results were graphically presented. A mathematical approach was realised and the results are presented.

Experimental Research Regarding the Tensile Strength of some Reinforced Composite Materials

The fiber-reinforced polymer composites are of great scientific and technical interest and a very impressive development. This justifies both the development of the research in this area, and the extension of the production of such materials.This paper presents research regarding three different composite materials, plates of carbon fibre, glass fiber and Kevlar in epoxy matrix. The mechanical characteristics of plates made of composite materials (CM) reinforced are presented. Based on the results, a comparative study between the reinforced materials used to manufacture the plates of CM is carried out.

Methods for Checking the Symmetry of the Formula One Car Nose

Checking the symmetry of a Formula One (F1) car nose requires the measurement and inspection of complex surfaces and raises a number of challenges both in terms of the equipment used and the measurement strategy. Verifying the symmetry allows the identification of the asymmetrical areas regarding the critical aerodynamic elements of F1 car nose. This paper presents three methods to check the symmetry of a F1 car nose and to determine the deviation using symmetry points (by points measuring) in plane using 2D scanned profiles and 3D laser scanned surfaces. In order to acquire the symmetry points, and to scan the profiles and the surfaces, a state of the art multi-sensor CMM (Coordinated Measuring Machine) has been used and the data has been processed in CATIA V5.

Design and Analysis of Carbon/Epoxy Composite Tubular Parts

The paper presents a design and analysis methods of carbon /epoxy composite tubular parts. Testing and analytical computations, based on classical laminated plate theory, of the proposed and manufactured material delivered the engineering constants that have been used in the finite element simulations of two important safety tests for the handlebar (bending and torsion). The experimental results obtained for lateral bending test (critical test) are in agreement with the finite element simulations.

Quality of the Hydroformed Tubular Parts

In this paper the authors shows hydroforming of tubular parts. Also it presents the technology of the hydroforming of the tubular parts. It is presented some experimental research compared with the prediction of the numerical simulation of this process. There are presented also the mechanical parameters of the material which are used in the field of the deforming process.

Mechanical Behavior of New Composite Materials Reinforced by Waste Glass Fibre

In this paper the authors propose a new material which includes waste composites reinforced with glass fibres, sand and polyester matrix. Through a new manufacturing method were obtained composites plaques. The experimental tests of compressive strength to the material were presented. Also, the authors presented a study of reinforcement degree.