Browsing by Author "Neves, P."
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- Implementing Lean Tools in the Manufacturing Process of Trimmings ProductsPublication . Neves, P.; Silva, F.J.G.; Ferreira, Luís Pinto; Pereira, Maria Teresa; Gouveia, A.; Pimentel, C.The increasing requirements regarding quality assurance and processes traceability require the implementation of continuous improvement procedures, with a view of maintaining the company’s levels of competitiveness and satisfaction for its customers in terms of quality. The optimization of information flows and manufacturing processes are, in general, extremely important factors in any company’s life. It is therefore important that companies quickly self-adapt to this kind of reality and adopt policies of product innovation and standardization of its production processes, in order to allow rapid adaptation to the constant market changes. The present work aims to identify problems and finding solutions through a combination of PDCA (Plan-Do-Check-Act) cycle, 5S (Seiri, Seiton, Seiso, Seiketsu, Shitzuke) and 5W2H (5 Whys + 2 Hows) tools those can be implemented into a program of continuous improvement, with a view of standardizing of processes, ensuring real profits in products typically with critical added-value. The combination of tools was implemented and the results have been checked, showing a significant impact in the Weaving production process, with gains of 10% in the useful available time by the operator.
- Influence of textile cord tension in cap ply productionPublication . Costa, C.; Silva, F.J.G.; Campilho, R.D.S.G.; Neves, P.; Godina, R.; Ferreira, S.The deep knowledge about manufacturing processes, as well as their optimization, present themselves as indispensable factors in the search for the best product quality. It is this point of view of continuous improvement that makes companies in profitable and sustainable way. This paper presents a study about unwinding tension of textile cords in the cap ply manufacturing process, using machines called cap-strips for production. In this work, tension can be understood as the tensile force exerted on the cord. This study determines the influence of unwinding tension on the physical and shrinkage properties of the cord, as well as on the properties of cap ply, namely green adhesion and peel adhesion. Furthermore, the impact of cord tension on tire uniformity and the manufacturing process itself was also studied. All conclusions are based on the performed experiments and the execution of statistical tests. This work allows to conclude that the unwinding tension of the textile cords have some impact on the cap ply properties but have no influence on the tire uniformity.
- Occupational exposure to metals fumes: A case study in a metalworking industryPublication . Reis, P.; Pinto, Edgar; Neves, P.; Ferreira, T.; Rodrigues, MatildeDuring welding process, a visible smoke that contains harmful metal fume and gas byproducts is produced. The exposure to these welding fumes can bring adverse effects for workers’ health, such as fever, bronchitis, fibrosis, chronic inflammation, functional changes in the lung and increased risk of cancer. The workers performing welding tasks are directly exposed to the metal particles produced by the weld. However, it is important to realize that not only the welders may be exposed to these fumes. If there is no particle suppression, these particles can reach other workers.
- Occupational noise exposure and cardiovascular diseases: A pilot study in a metalworking industryPublication . Filipe, J.; Carvalhais, Carlos; Neves, P.; Sena, M.; Baeta, Cristina; Teixeira, J. P.; Pereira, C. C.Exposure to noise is an important risk to human health. Despite that, its control in the occupational environment is only made considering the prevention of hearing loss. Portuguese law for this subject neglect the non-auditory effects, such as sleep disturbances, annoyance and stress, reduction of cognitive performance and cardiovascular diseases.