Empresa Brasileira de Pesquisa AgropecuÃria / Gomas sÃo amplamente utilizadas em processos industriais. As gomas sÃo polÃmeros de alto peso molecular e podem ser provenientes de algas, sementes, animais ou microrganismos. A indÃstria de alimentos faz uso desses polÃmeros, principalmente goma arÃbica, para atribuir aos seus produtos algumas caracterÃsticas necessÃrias à sua melhor qualidade, atravÃs de modificaÃÃes e controle de viscosidade, estabilidade, textura, durabilidade e consistÃncia. A goma de cajueiro apresenta-se como uma possÃvel sucedÃnea à goma arÃbica e esta possibilidade vem sendo investigada com resultados muito promissores. Entretanto, nÃo hà metodologia ou estudo para a produÃÃo em larga escala de goma de cajueiro. Todos os mÃtodos trabalhados sÃo descritos para a escala de laboratÃrio. O presente trabalho se propÃe a trazer contribuiÃÃes para a produÃÃo em larga escala de goma de cajueiro e avaliaÃÃes da composiÃÃo e propriedades relevantes da goma que possam ser afetadas por tratamentos tÃrmicos durante o processamento industrial. Portanto, este trabalho consistiu na avaliaÃÃo de parÃmetros para a produÃÃo contÃnua e automatizada da goma de cajueiro, a qual apresentou a etapa de solubilidade e separaÃÃo da parte insolÃvel como principal obstÃculo no processo. AlÃm disso, a goma purificada foi submetida a tratamentos tÃrmicos e comparada à goma purificada sem tratamento tÃrmico como modo de observar possÃveis mudanÃas estruturais em decorrÃncia de produÃÃo ou usos industriais da goma de cajueiro. Os resultados mostraram estabilidade da goma nas condiÃÃes de teste, composiÃÃo semelhante à goma arÃbica, comportamento pseudoplÃstico com platà newtoniano a 3,3 mPa.s em soluÃÃo a 5%, altos teores de arabinose e Ãcido glicurÃnico e baixos teores de galactose quando comparados a valores relatados na literatura para goma de cajueiro do Brasil. / Gums are widely used in industrial processes. The gums are high molecular weight polymers and may be derived from algae, seeds, animals or microorganisms. The food industry makes use of these polymers to assign some of their products for their best quality characteristics through changes and control of viscosity, stability, texture, durability and consistency. The cashew tree gum is presented as a possible substitute for gum arabic and studies have brought very promising results. However there is no study or methodology for large scale production of cashew tree gum. All methods are described for laboratory scale. This paper aims to bring contributions to large-scale production of cashew tree gum and reviews the composition and relevant properties of the gum which can be affected by heat treatments during the manufacturing process. Therefore, this study was the evaluation of parameters for continuous and automated production of cashew tree gum, which presented the step of solubility and separation of insoluble part as the main obstacle in the process. Furthermore, the gum was purified and subjected to heat treatment compared to the purified gum without heat treatment so as to observe possible structural changes due to production or industrial uses of cashew tree gum. The results showed the gum stability under the test conditions. The composition of cashew gum is similar to gum arabic. A 5% solution shows shear thinning behavior and Newtonian plateau at 3.3 mPa.s The cashew gum has high levels of arabinose and glucuronic acid and low levels of galactose when compared to values reported in the literature for cashew gum from Brazil.

<p>Examensarbetet genomfördes åt företaget Corus Byggsystem AB. Ett företag placerat i Halmstad som tillverkar profilplåt och lättbalk till tak och fasader. Företaget erbjuder även god rådgivning och skapar optimala lösningar för kunden.</p><p>I företagets produktion finns det en maskin som pressar specialbalkar. Denna arbetsplats är varken produktionseffektiv eller ergonomiskt riktig då materialet och balkarna lyftes manuellt, i vissa fall även över huvudet. På tunga arbetsplatser är det oerhört viktigt att se över ergonomin, både för att förbättra säkerheten och för att öka produktionsvolymen. Fokus lades därför vid att förbättra arbetsplatsen ergonomiskt för att resultera i ett säkert och produktionseffektivt resultat.</p><p>Som metod har tre olika varianter använts. Främst Ullmans metod <em>The Mechanical Design Process</em> och Fredy Olssons <em>Primär- och Principkonstruktion</em>. Även SVID’s <em>Designprocess</em> har funnits väl till pass.</p> / <p>This thesis work has been conducted for Corus Byggsystem AB. The company is located in Halmstad and manufactures profile claddings and purlins from sheet metal. The company also offers the customers professional advice and creates optimal solutions.</p><p>In the production there is a press brake that manufactures purlins. This work station has neither efficient production or is ergonomically correct. The material and purlins are lifted manually by the workers and in some cases over the head. For heavy work, it is extremely important to apply an ergonomic approach, both to improve security for the workers and to increase the manufacturing volume. The focus was therefore on how to improve the workplace ergonomically to result in a safe workplace with efficient manufacturing results.</p><p>The method that was mainly used in this project was David G. Ullmans <em>The Mechanical Design Process</em> and Fredy Olssons <em>Primärkonstruktion</em> and <em>Principkonstruktion</em>. Also SVID’s <em>Design Process</em> has been used as support.</p>

Most manufacturing processes produce parts that can only be correctly measured after the process cycle has been completed. Even if in-process measurement and control is possible, it is often too expensive or complex to practically implement. In this paper, a simple control scheme based on output measurement and input change after each processing cycle is proposed. It is shown to reduce the process dynamics to a simple gain with a delay, and reduce the control problem to a SISO discrete time problem. The goal of the controller is to both reduce mean output errors and reduce their variance. In so doing the process capability (e.g. Cpk) can be increased without additional investment in control hardware or in-process sensors. This control system is analyzed for two types of disturbance processes: independent (uncorrelated) and dependent (correlated). For the former the closed-loop control increased the output variance, whereas for the latter it can decrease it significantly. In both cases, proper controller design can reduce the mean error to zero without introducing poor transient performance. These finding were demonstrated by implementing Cycle to Cycle (CtC) control on a simple bending process (uncorrelated disturbance) and on an injection molding process (correlated disturbance). The results followed closely those predicted by the analysis. / Singapore-MIT Alliance (SMA)

In today's industry it is of mayor concern to keep the manufacturing processes as effective and flexible as possible. The usage of robots and automatic technology is a much known way to achieve the goals of rationalization. The disadvantage lays in the fact that implementation of robots is usually a very resource consuming task. However, in some circumstances a solution to this matter may be to simply implement mobile robots instead of fixed robots. The task of this project is to successfully control and understand the system of a mobile robot in a automatic manufacturing process.

Polylactones are biodegradable polymers which may be used as alternatives to conventional plastics and have shown promise in novel medical applications. Industrial production of polylactones requires the use of a catalyst. The work described herein is directed toward the development of novel cationic magnesium-based lactone-polymerization catalysts. These cationic species are produced by alkide abstraction from a neutral precursor; a strategy which has seen only preliminary exploration in the context of lactone polymerization. The target catalyst system features a neutral phosphinimine-derivative ligand structure which was developed and produced specifically for the purpose of lactone polymerization catalysis. Target complexes were obtained by reaction of neutral alkylmagnesium precursors with protonated ligand derivatives. Syntheses and characterization of novel species are described herein. These catalysts are very active in the polymerization of 6-caprolactone, generating high molecular weight polymers in mere minutes under mild conditions. A preliminary study of polymerization catalysis is also reported. / xxiii, 126 leaves ; 29 cm

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This thesis is focused on using FMECA in a manufacturing company. Analysis was developed in conjunction with a manufacturing company and its main goal is to decrease number of scrap. FMECA helped to find the most critical possible defects and then some actions for decreasing number of scrap were suggested.

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Yes / In advanced manufacturing systems, the production of complex and highly customisable products requires the preparation of many different product specifications and associated manufacturing process plans. The creation of these plans involves the search for the production resources (e.g. robots, machine tools, inspection devices) that are needed to implement the product specifications and how to orchestrate them. We present a model-based approach to the automatic generation of manufacturing process plans from the models of the target products and available resources. The modelling language is based on labelled transition systems, which are useful to represent sequences of operations that can be executed in parallel by multiple production resources. Some preliminary experimental results demonstrate the feasibility of the presented approach. / This conference paper will be released for public view at the end of the 12-month embargo period established by SpringerNature for their book series.